A kind of charging method and device[technical field]
The present invention relates to battery technology field more particularly to a kind of charging method and devices.
[background technique]
Existing charging modes, be it is a kind of a certain current potential is persistently charged to by constant current after, then with the progress of this current potentialThe charging modes of constant-voltage charge.
In realizing process of the present invention, at least there are the following problems in the prior art for inventor's discovery:
When being charged the battery using existing charging modes, the anode potential of battery is constantly reduced, and works as anode potentialAnode is reduced to not analyse the minimum anode potential of lithium or less and continue for some time, will lead to lithium ion galvanic anode surface alsoOriginal is precipitated at lithium metal, and lithium metal will affect the security performance of battery in the accumulation of electrode surface.
[summary of the invention]
In view of this, the embodiment of the invention provides a kind of charging method and devices, electricity can be alleviated to a certain extentPond anode analyses the problem of the problem of lithium and therefore caused cell safety hidden danger.
On the one hand, the embodiment of the invention provides a kind of charging methods, comprising: charges the battery；The charging packetInclude the first charging stage and the second charging stage；
First charging stage includes at least two charging sub-stages, in each charging sub-stage, to describedBattery carries out invariable power charging, and carries out constant-current discharge to the battery；
In second charging stage, constant-voltage charge is carried out to the battery.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the method is alsoInclude:
Determine that the galvanic anode does not occur to analyse the maximum charging current of lithium；
Do not occurred to analyse the maximum charging current of lithium and the blanking voltage of the battery according to the galvanic anode, described in acquisitionGalvanic anode does not occur to analyse the maximum charge power of lithium；
The maximum charge power that analysis lithium does not occur according to the galvanic anode, obtains what the invariable power charging stage usedCharge power.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the invariable powerThe charge power that charging stage uses is more than or equal to the galvanic anode and does not occur to analyse the maximum charge power of lithium.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation determines the electricityPond anode does not occur to analyse the maximum charging current of lithium, comprising:
It is charged respectively to the battery at least two candidate electric currents；
Detect whether the galvanic anode occurs analysis lithium in each charging process；
Determine that the galvanic anode does not occur to analyse the candidate electric current set of lithium in the charging process, and by the candidateMaximum one candidate electric current does not occur to analyse the maximum charging current of lithium as the galvanic anode in electric current set.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, described first fillsAfter the electric stage, before second charging stage, the method also includes；
Stewing process is carried out to the battery；
Constant-current charge is carried out to the battery Jing Guo stewing process, until the voltage of the battery reaches charge cutoff electricityPressure.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
Charging method provided in an embodiment of the present invention includes charging the battery；The charging included the first charging stageWith the second charging stage；First charging stage includes at least two charging sub-stages, in each charging sub-stage,Invariable power charging is carried out to the battery, and constant-current discharge is carried out to the battery；In second charging stage, to instituteIt states battery and carries out constant-voltage charge.In the embodiment of the present invention, in the first charging stage, battery is carried out by invariable power charging and constant currentThe cyclic process for the charging sub-stage constituted of discharging carries out powerful charging to battery by invariable power charging, is filled with being promotedElectric speed；And the constant-current discharge in each charging sub-stage can make the anode potential of battery raise, thus, so that nextThe anode potential of battery reduces smaller when charging subcycle starts, in turn, so that battery does not analyse the minimum anode of lithium in anodeDuration is shorter under current potential, alleviates the anode analysis lithium phenomenon of battery, also, the embodiment of the present invention improves filling for batteryElectric speed improves the safety of battery, can alleviate the problem of galvanic anode analyses lithium to a certain extent and therefore causeCell safety hidden danger the problem of.
On the other hand, the embodiment of the invention provides a kind of charging unit, described device is applied to charge the batteryMethod, it is described charging include the first charging stage and the second charging stage；
Described device includes charhing unit and discharge cell；
First charging stage includes at least two charging sub-stages, described to fill in each charging sub-stageElectric unit is used to carry out the battery invariable power charging, and the discharge cell is used to carry out constant-current discharge to the battery；
In second charging stage, the charhing unit is also used to carry out constant-voltage charge to the battery.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, described device is alsoIncluding acquiring unit；
The acquiring unit, is used for:
Determine that the galvanic anode does not occur to analyse the maximum charging current of lithium；
Do not occurred to analyse the maximum charging current of lithium and the blanking voltage of the battery according to the galvanic anode, described in acquisitionGalvanic anode does not occur to analyse the maximum charge power of lithium；
The maximum charge power that analysis lithium does not occur according to the galvanic anode, obtains what the invariable power charging stage usedCharge power.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the invariable powerThe charge power that charging stage uses is more than or equal to the galvanic anode and does not occur to analyse the maximum charge power of lithium.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the acquisition are singleWhen member is specifically used for determining that the galvanic anode does not occur to analyse the maximum charging current of lithium, it is specifically used for:
It is charged respectively to the battery at least two candidate electric currents；
Detect whether the galvanic anode occurs analysis lithium in each charging process；
Determine that the galvanic anode does not occur to analyse the candidate electric current set of lithium in the charging process, and by the candidateMaximum one candidate electric current does not occur to analyse the maximum charging current of lithium as the galvanic anode in electric current set.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, described first fillsAfter the electric stage, before second charging stage, the charhing unit is also used to；
Stewing process is carried out to the battery；
Constant-current charge is carried out to the battery Jing Guo stewing process, until the voltage of the battery reaches charge cutoff electricityPressure.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
Charging unit provided in an embodiment of the present invention is applied to the method charged the battery, and the charging includes firstCharging stage and the second charging stage；Described device includes charhing unit and discharge cell, and first charging stage includes extremelyFew two charging sub-stages, in each charging sub-stage, the charhing unit is used to carry out invariable power to the batteryCharging, the discharge cell are used to carry out constant-current discharge to the battery；The charhing unit is also used in second chargingIn stage, constant-voltage charge is carried out to the battery.In the embodiment of the present invention, in the first charging stage, battery is carried out by permanent functionThe cyclic process for the charging sub-stage that rate charging and constant-current discharge are constituted carries out powerful fill to battery by invariable power chargingElectricity, to promote charging rate；And the constant-current discharge in each charging sub-stage can make the anode potential of battery raise, fromAnd so that the anode potential of next charging subcycle battery when starting reduce it is smaller, in turn, so that battery is not analysed in anodeDuration is shorter under the minimum anode potential of lithium, alleviates the anode analysis lithium phenomenon of battery, also, the embodiment of the present invention mentionsThe high charging rate of battery, the problem of improving the safety of battery, galvanic anode analysis lithium can be alleviated to a certain extentAnd therefore caused by cell safety hidden danger the problem of.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attachedFigure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this fieldFor those of ordinary skill, without any creative labor, it can also be obtained according to these attached drawings other attachedFigure.
Fig. 1 is the first schematic diagram of charging method provided by the embodiment of the present invention；
Fig. 2 is the second schematic diagram of charging method provided by the embodiment of the present invention；
Fig. 3 is the galvanic anode current potential and charging time relation curve that the embodiment of the present invention obtains；
Fig. 4 is existing charging method schematic diagram；
Fig. 5 is the galvanic anode current potential and charging time relation curve that the prior art obtains；
Fig. 6 is the functional block diagram of charging unit provided by the embodiment of the present invention.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawingIt states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.BaseEmbodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all itsIts embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodimentsThe present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicateThere may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these threeSituation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It will be appreciated that though the charging stage may be described in embodiments of the present invention using term first, second etc., butThese charging stages should not necessarily be limited by these terms.These terms are only used to be distinguished from each other open the charging stage.For example, not departing fromIn the case where range of embodiment of the invention, the first charging stage can also be referred to as the second charging stage, similarly, the second chargingStage can also be referred to as the first charging stage.
Depending on context, word as used in this " if " can be construed to " ... when " or " when ...When " or " in response to determination " or " in response to detection ".Similarly, depend on context, phrase " if it is determined that " or " if detection(condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when the detection (condition of statementOr event) when " or " in response to detection (condition or event of statement) ".
Embodiment one
The embodiment of the present invention provides a kind of charging method, this method comprises: charging the battery.
Specifically, the charging includes the first charging stage and the second charging stage in the embodiment of the present invention.Wherein, firstCharging stage includes at least two charging sub-stages, in each charging sub-stage, to battery progress invariable power charging and rightBattery carries out constant-current discharge；In the second charging stage, constant-voltage charge is carried out to battery.
In the embodiment of the present invention, in the first charging stage of the charging process, at least two charging are being carried out to batteryDuring the mode in stage is charged, if the voltage of battery reaches the charge cutoff voltage of the battery, the first charging rankSection terminates, and starts the charging for carrying out for the second charging stage to battery.
In the embodiment of the present invention, in the first charging stage of the charging process, in the process for carrying out constant-voltage charge to batteryIn, if the electric current of battery reaches the charging cut-off current of the battery, the second charging stage terminated, and the battery is filled in completionElectricity.
Referring to FIG. 1, it is first schematic diagram of charging method provided by the embodiment of the present invention, abscissa table in Fig. 1Show that time t, ordinate indicate electric current I.
It is the second of the charging process after A point as shown in Figure 1, being the first charging stage of the charging process before A pointCharging stage, B point indicate that the charging process terminates.
As shown in Figure 1, the stage between X point and Y point is one of charging sub-stage in the first charging stage, specifically, the stage between X point and Z point is the invariable power charging stage in each charging sub-stage, and in this stage, performance number is keptIt is constant, current value increase at any time and reduce；Stage between Z point and Y point is the constant-current discharge in each charging sub-stageStage, in this stage, current value remain unchanged；Stage between A point and B point is constant voltage charging phase, in this stage, electricityFlow valuve increase at any time and reduce.
Specifically, if P1For the performance number for carrying out invariable power charging to battery in the invariable power charging stage, I2For in constant currentThe current value of discharge regime, t1For the duration of invariable power charging stage in each charging sub-stage, t2For in each charging sub-stageThe duration in constant-current discharge stage.
Specifically, determining battery performance number P used in the invariable power charging stage1When, it can include but is not limited toFollowing implementations: it determines that galvanic anode does not occur to analyse the maximum charging current of lithium, then, is not occurred to analyse lithium according to galvanic anodeMaximum charging current and battery blanking voltage, obtain galvanic anode do not occur analyse lithium maximum charge power, in turn, according toGalvanic anode does not occur to analyse the maximum charge power of lithium, the charge power that the acquisition invariable power charging stage uses.
During a concrete implementation, the charge power that the invariable power charging stage uses is more than or equal to battery sunPole does not occur to analyse the maximum charge power of lithium.
Specifically, determining that galvanic anode does not occur to analyse the implementation of the maximum charging current of lithium in the embodiment of the present inventionIt can include but is not limited to following manner: being charged the battery respectively at least two candidate electric currents, it is then detected that battery is positiveWhether pole occurs analysis lithium in each charging process, thus, determine that galvanic anode does not occur to analyse candidate's electricity of lithium during the charging processAdfluxion is closed, and in turn, the maximum for not occurring to analyse lithium using maximum one in candidate electric current set candidate electric current as galvanic anode is filledElectric current.
In the embodiment of the present invention, performance number P1Numerical value can be determined according to actual needs, specifically, can be P1Biggish performance number is selected, to promote the charging rate of battery.During a concrete implementation, performance number P1Numerical value canIn [0.7CV0, 3CV0] in the range of selected.
In the embodiment of the present invention, the duration t of invariable power charging stage1Numerical value can be determined according to actual needs,Specifically, can be t1Biggish numerical value is selected, so that the charging rate of battery gets a promotion.In a concrete implementation mistakeCheng Zhong, t1Numerical value can be selected in the range of [0.1s, 20s].
In the embodiment of the present invention, current value I2Numerical value can be determined according to actual needs, specifically, can be I2Lesser current value is selected, to promote the charging rate of battery.During a concrete implementation, current value I2Numerical value canTo be selected in the range of [0,0.2C].
In the embodiment of the present invention, the duration t in constant-current discharge stage2Numerical value can be determined according to actual needs, haveBody, can be t2Lesser numerical value is selected, so that the charging rate of battery gets a promotion.In a concrete implementation processIn, t2Numerical value can be selected in the range of [0.01s, 2s].
It is understood that in the embodiment of the present invention, make the duration of the invariable power charging stage in the first charging stage compared withGreatly, meanwhile, so that the duration in the constant-current discharge stage of the first charging stage is shorter, i.e., so that t1Greater than t2.In this way, can pass throughThe high-power charging of longer duration improves the charging rate of battery, it is also possible to shorten battery battery during the charging processAnode is in the minimum anode potential duration below that anode does not analyse lithium, to reduce due to high-power charging bring anode tableThe increase of face lithium concentration shortens anode and is in the time of low potential, and then the safety for avoiding galvanic anode analysis lithium from causing is askedTopic.
During a concrete implementation, t1/t2Numberical range can be in the range of [5,50], according to practical needIt is determined, the embodiment of the present invention is without being particularly limited to.
Specifically, after the first charging stage, before the second charging stage, this method may be used also in the embodiment of the present inventionTo include: to carry out stewing process to battery；Constant-current charge is carried out to the battery Jing Guo stewing process, until the voltage of battery reachesCharge cutoff voltage.
Referring to FIG. 2, it is second schematic diagram of charging method provided by the embodiment of the present invention, abscissa table in Fig. 2Show that time t, ordinate indicate electric current I.
It is the second of the charging process after D point as shown in Fig. 2, being the first charging stage of the charging process before A pointCharging stage.B point indicates that the charging process terminates.
As shown in Fig. 2, the stage between X point and Y point is one of charging sub-stage in the first charging stage, specifically, the stage between X point and Z point is the invariable power charging stage in each charging sub-stage, and in this stage, performance number is keptIt is constant, current value increase at any time and reduce；Stage between Z point and Y point is the constant-current discharge in each charging sub-stageStage, in this stage, increase at any time, current value remain unchanged.As shown in Fig. 2, being the second charging between D point and B pointThe constant voltage charging phase in stage, in this stage, current value increase at any time and reduce.
As shown in Fig. 2, being stewing process stage, in this stage, current value zero between A point and C point；C point and D point itBetween be constant-current charging phase, in this stage, current value remains unchanged.
Specifically, if P1For the performance number for carrying out invariable power charging to battery in the invariable power charging stage, I2For in constant currentThe current value of discharge regime, t1For the duration of invariable power charging stage in each charging sub-stage, t2For in each charging sub-stageThe duration in constant-current discharge stage, t3For the duration in stewing process stage, I1For the current value of constant-current charging phase, I3For chargingCut-off current.
It is understood that the first charging stage as shown in Figure 2 is identical with the first charging stage as shown in Figure 1,In charging method as shown in Figure 2, performance number P1, current value I2, invariable power charging duration t1With constant-current discharge duration t2ValueIn mode and charging method shown in FIG. 1, performance number P1, current value I2, invariable power charging duration t1With constant-current discharge duration t2'sValue mode is consistent, and the embodiment of the present invention no longer repeats this.
Specifically, in the embodiment of the present invention, the duration t in stewing process stage3It can be taken in the range of [0,30s]Value, the embodiment of the present invention is to this without being particularly limited to.
It is understood that if duration t3Value be 0, battery has reached the charge cutoff voltage of battery in A point, at this timeCharging process is charging process shown in FIG. 1；If duration t3Value be not 0, namely through stewing process rank after a period of timeThe voltage of section, battery is less than charge cutoff voltage, so, the voltage of battery can be made to reach filling for battery by constant-current chargeElectric blanking voltage can enter for the second charging stage, i.e., carry out constant-voltage charge to battery in turn.
Specifically, carrying out current value I used in constant-current charging phase to battery1It can be in the range of [0.7C, 3C]Value is carried out, the embodiment of the present invention is to this without being particularly limited to.
Charging method provided by the embodiment of the present invention can be applied to battery in the prior art.The embodiment of the present inventionThe battery being applicable in can include but is not limited to following several.
For example, the cathode composition of battery can include but is not limited to: cobalt-lithium oxide (LiCoO in battery composition2)、LiFePO4 (LiFePO4), one of cobalt nickel lithium manganate ternary material (NCMn) and nickel cobalt aluminium lithium ternary material (NCAl) orIt is several；The anode composition of battery can include but is not limited to: one of graphite, hard carbon and carbonaceous mesophase spherules (MCMB) are severalKind.
It is understood that galvanic anode does not analyse the minimum anode electricity that the maximum charging current of lithium, galvanic anode do not analyse lithiumPosition, the charging cut-off current and battery composition of the charge cutoff voltage of battery and battery are related, the embodiment of the present invention to this not intoRow is particularly limited to.
It should be noted that the executing subject of the above method can be charging unit, which includes but is not limited to chargeDevice, charging manager, charge controller etc..
One technical solution of the embodiment of the present invention has the advantages that
Charging method provided in an embodiment of the present invention includes charging the battery；Charging includes the first charging stage and theTwo charging stages；First charging stage included at least two charging sub-stages, in each charging sub-stage, was carried out to battery permanentPower charging, and constant-current discharge is carried out to battery；In the second charging stage, constant-voltage charge is carried out to battery.The present invention is realIt applies in example, in the first charging stage, to the circulation for the charging sub-stage that battery be made of invariable power charging and constant-current dischargeProcess carries out powerful charging to battery by invariable power charging, to promote charging rate；And in each charging sub-stageConstant-current discharge can make the anode potential of battery raise, thus, so that the anode of next charging subcycle battery when startingCurrent potential reduces smaller, in turn, so that battery duration under the minimum anode potential that anode does not analyse lithium is shorter, alleviatesThe anode of battery analyses lithium phenomenon, also, the embodiment of the present invention improves the charging rate of battery, improves the safety of battery,The problem of the problem of galvanic anode analysis lithium can be alleviated to a certain extent and therefore caused cell safety hidden danger.
Embodiment two
Charging method provided by one based on the above embodiment, the embodiment of the present invention provide a kind of specific reality of charging methodExisting mode.
Specifically, battery composition used in the embodiment of the present invention are as follows: by cobalt-lithium oxide (LiCoO2) it is used as cathode, by stoneInk is used as anode, in addition diaphragm, electrolyte and pack case, are made up of techniques such as assembling, chemical conversion and ageings.
At 25 DEG C, expiring for the battery fills charging capacity for 3500mAh, charge cutoff voltage V0For 4.4V, the charging of batteryCut-off current is 0.05C.Also, the maximum charging current that the battery measured anode at 25 DEG C does not analyse lithium is 0.7C, anodeThe minimum anode potential for not analysing lithium is -50mV.
It charges to the battery, which includes: the first charging stage and the second charging stage:
Specifically, in each charging sub-stage in the first charging stage, the charging process of invariable power charging stage are as follows:Invariable power charging is carried out with the firm power of 18.5W to battery, the charging duration of invariable power charging stage is 0.1s；It is filled firstIn each charging sub-stage in the electric stage, the discharge process in constant-current discharge stage are as follows: to battery with the constant current of 0.02C intoRow constant-current discharge, when electric discharge in constant-current discharge stage a length of 0.01s；
Above-mentioned charging sub-stage is carried out in the first charging stage circulation, until the voltage of battery reaches charge cutoff voltage4.4V, the first charging stage terminate；
Start to carry out for the second charging stage, constant-voltage charge is carried out with the constant voltage of 4.4V to battery, until the electricity of batteryStream reaches charging cut-off current 0.05C.
Referring to FIG. 3, it is the galvanic anode current potential and charging time relation curve that the embodiment of the present invention obtains.Such as Fig. 3Shown, the curve 1 in Fig. 3 is the galvanic anode current potential and charging time relation curve that the embodiment of the present invention obtains, void in Fig. 3Line is the line of demarcation -50mV for the minimum anode potential that anode does not analyse lithium, and the E point and F point in Fig. 3 are curve 1 and the line of demarcation -50mVCrosspoint.
As shown in figure 3, by the galvanic anode that above-mentioned charging method obtains be in -50mV it is below when a length of 7min.It is logicalIt crosses charging method provided by the embodiment of the present invention to charge the battery, there is no analysis lithium phenomenons for galvanic anode, also, willBattery is charged to battery and fills the time used in the 80% of charging capacity completely for 48.5min.
In contrast, referring to FIG. 4, it is existing charging method schematic diagram.Referring to FIG. 4, existing charging methodIt is with the constant current of 0.7C to battery progress constant-current charge to charge cutoff voltage 4.4V, and then with the constant electricity of 4.4VStream carries out constant-voltage charge to charging cut-off current 0.05C to battery.
It is charged with charging method shown in Fig. 4 to the battery, obtains galvanic anode current potential and charging time relationship is bentLine, referring to FIG. 5, it is the galvanic anode current potential and charging time relation curve that the prior art obtains.As shown in figure 5, in Fig. 5Curve 2 is the galvanic anode current potential and charging time relation curve that the prior art obtains, and dotted line is that anode does not analyse lithium in Fig. 5The line of demarcation -50mV of minimum anode potential, M point and N point in Fig. 5 are the crosspoint of curve 2 and the line of demarcation -50mV.
As shown in figure 5, by the galvanic anode that existing charging method obtains be in -50mV it is below when a length of 25min.It is charged the battery by existing charging method, galvanic anode has occurred analysing lithium phenomenon, also, battery is charged to batteryCompletely filling the time used in the 80% of charging capacity is 55.4min.
In conclusion charging method provided by the embodiment of the present invention carries out by permanent function battery in the first charging stageThe cyclic process for the charging sub-stage that rate charging and constant-current discharge are constituted carries out powerful fill to battery by invariable power chargingElectricity, to promote charging rate；And the constant-current discharge in each charging sub-stage can make the anode potential of battery raise, fromAnd so that the anode potential of next charging subcycle battery when starting reduce it is smaller, in turn, so that battery is not analysed in anodeDuration is shorter under the minimum anode potential of lithium, alleviates the anode analysis lithium phenomenon of battery, also, the embodiment of the present invention mentionsThe high charging rate of battery, the problem of improving the safety of battery, galvanic anode analysis lithium can be alleviated to a certain extentAnd therefore caused by cell safety hidden danger the problem of.
Embodiment three
Charging method provided by one based on the above embodiment, the embodiment of the present invention provide a kind of specific reality of charging methodExisting mode.
Specifically, battery composition used in the embodiment of the present invention are as follows: by cobalt-lithium oxide (LiCoO2) it is used as cathode, by stoneInk is used as anode, in addition diaphragm, electrolyte and pack case, are made up of techniques such as assembling, chemical conversion and ageings.
At 25 DEG C, expiring for the battery fills charging capacity for 3500mAh, charge cutoff voltage V0For 4.4V, the charging of batteryCut-off current is 0.05C.Also, the maximum charging current that the battery measured anode at 25 DEG C does not analyse lithium is 0.7C, anodeThe minimum anode potential for not analysing lithium is -50mV.
It charges to the battery, which includes: the first charging stage and the second charging stage:
Specifically, in each charging sub-stage in the first charging stage, the charging process of invariable power charging stage are as follows:Invariable power charging is carried out with the firm power of 15.4W to battery, the charging duration of invariable power charging stage is 10s；It is filled firstIn each charging sub-stage in the electric stage, the discharge process in constant-current discharge stage are as follows: to battery with the constant current of 0.1C intoRow constant-current discharge, when electric discharge in constant-current discharge stage a length of 0.2s；
Above-mentioned charging sub-stage is carried out in the first charging stage circulation, until the voltage of battery reaches charge cutoff voltage4.4V, the first charging stage terminate；
After first charging stage terminated, stewing process carried out to battery, the when a length of 10s in stewing process stage, later,The charge cutoff voltage 4.4V of constant-current charge to battery is carried out with the constant current of 0.7C to battery；
Start to carry out for the second charging stage, constant-voltage charge is carried out with the constant voltage of 4.4V to battery, until the electricity of batteryStream reaches charging cut-off current 0.05C.
Provided charging method charges the battery through the embodiment of the present invention, and there is no analysis lithium is existing for galvanic anodeAs, also, battery is charged to battery and fills the time used in the 80% of charging capacity completely for 51.4min.In the embodiment of the present invention,In the first charging stage, cyclic process to the charging sub-stage that battery be made of invariable power charging and constant-current discharge is logicalIt crosses invariable power charging and powerful charging is carried out to battery, to promote charging rate；And the constant current in each charging sub-stage is putElectricity can make the anode potential of battery raise, thus, so that the anode potential fall of next charging subcycle battery when startingLow is smaller, in turn, so that battery duration under the minimum anode potential that anode does not analyse lithium is shorter, alleviates batteryAnode analyses lithium phenomenon, also, the embodiment of the present invention improves the charging rate of battery, the safety of battery is improved, certainThe problem of the problem of galvanic anode analysis lithium can be alleviated in degree and therefore caused cell safety hidden danger.
Example IV
Charging method provided by one based on the above embodiment, the embodiment of the present invention provide a kind of specific reality of charging methodExisting mode.
Specifically, battery composition used in the embodiment of the present invention are as follows: by cobalt-lithium oxide (LiCoO2) it is used as cathode, by stoneInk is used as anode, in addition diaphragm, electrolyte and pack case, are made up of techniques such as assembling, chemical conversion and ageings.
At 25 DEG C, expiring for the battery fills charging capacity for 3500mAh, charge cutoff voltage V0For 4.4V, the charging of batteryCut-off current is 0.05C.Also, the maximum charging current that the battery measured anode at 25 DEG C does not analyse lithium is 0.7C, anodeThe minimum anode potential for not analysing lithium is -50mV.
It charges to the battery, which includes: the first charging stage and the second charging stage:
Specifically, in each charging sub-stage in the first charging stage, the charging process of invariable power charging stage are as follows:Invariable power charging is carried out with the firm power of 15.4W to battery, the charging duration of invariable power charging stage is 2s；In the first chargingIn each charging sub-stage in stage, the discharge process in constant-current discharge stage are as follows: battery is carried out with the constant current of 0.2CConstant-current discharge, when electric discharge in constant-current discharge stage a length of 0.05s；
Above-mentioned charging sub-stage is carried out in the first charging stage circulation, until the voltage of battery reaches charge cutoff voltage4.4V, the first charging stage terminate；
After first charging stage terminated, stewing process carried out to battery, the when a length of 10s in stewing process stage, later,The charge cutoff voltage 4.4V of constant-current charge to battery is carried out with the constant current of 0.7C to battery；
Start to carry out for the second charging stage, constant-voltage charge is carried out with the constant voltage of 4.4V to battery, until the electricity of batteryStream reaches charging cut-off current 0.05C.
Provided charging method charges the battery through the embodiment of the present invention, and there is no analysis lithium is existing for galvanic anodeAs, also, battery is charged to battery and fills the time used in the 80% of charging capacity completely for 51.2min.In the embodiment of the present invention,In the first charging stage, cyclic process to the charging sub-stage that battery be made of invariable power charging and constant-current discharge is logicalIt crosses invariable power charging and powerful charging is carried out to battery, to promote charging rate；And the constant current in each charging sub-stage is putElectricity can make the anode potential of battery raise, thus, so that the anode potential fall of next charging subcycle battery when startingLow is smaller, in turn, so that battery duration under the minimum anode potential that anode does not analyse lithium is shorter, alleviates batteryAnode analyses lithium phenomenon, also, the embodiment of the present invention improves the charging rate of battery, the safety of battery is improved, certainThe problem of the problem of galvanic anode analysis lithium can be alleviated in degree and therefore caused cell safety hidden danger.
Embodiment five
Charging method provided by one based on the above embodiment, the embodiment of the present invention provide a kind of specific reality of charging methodExisting mode.
Specifically, battery composition used in the embodiment of the present invention are as follows: by cobalt-lithium oxide (LiCoO2) it is used as cathode, by stoneInk is used as anode, in addition diaphragm, electrolyte and pack case, are made up of techniques such as assembling, chemical conversion and ageings.
At 25 DEG C, expiring for the battery fills charging capacity for 3500mAh, charge cutoff voltage V0For 4.4V, the charging of batteryCut-off current is 0.05C.Also, the maximum charging current that the battery measured anode at 25 DEG C does not analyse lithium is 0.7C, anodeThe minimum anode potential for not analysing lithium is -50mV.
It charges to the battery, which includes: the first charging stage and the second charging stage:
Specifically, in each charging sub-stage in the first charging stage, the charging process of invariable power charging stage are as follows:Invariable power charging is carried out with the firm power of 15.4W to battery, the charging duration of invariable power charging stage is 20s；It is filled firstIn each charging sub-stage in the electric stage, the discharge process in constant-current discharge stage are as follows: to battery with the constant current of 0.1C intoRow constant-current discharge, when electric discharge in constant-current discharge stage a length of 2s；
Above-mentioned charging sub-stage is carried out in the first charging stage circulation, until the voltage of battery reaches charge cutoff voltage4.4V, the first charging stage terminate；
After first charging stage terminated, stewing process carried out to battery, the when a length of 10s in stewing process stage, later,The charge cutoff voltage 4.4V of constant-current charge to battery is carried out with the constant current of 0.7C to battery；
Start to carry out for the second charging stage, constant-voltage charge is carried out with the constant voltage of 4.4V to battery, until the electricity of batteryStream reaches charging cut-off current 0.05C.
Provided charging method charges the battery through the embodiment of the present invention, and there is no analysis lithium is existing for galvanic anodeAs, also, battery is charged to battery and fills the time used in the 80% of charging capacity completely for 51.8min.In the embodiment of the present invention,In the first charging stage, cyclic process to the charging sub-stage that battery be made of invariable power charging and constant-current discharge is logicalIt crosses invariable power charging and powerful charging is carried out to battery, to promote charging rate；And the constant current in each charging sub-stage is putElectricity can make the anode potential of battery raise, thus, so that the anode potential fall of next charging subcycle battery when startingLow is smaller, in turn, so that battery duration under the minimum anode potential that anode does not analyse lithium is shorter, alleviates batteryAnode analyses lithium phenomenon, also, the embodiment of the present invention improves the charging rate of battery, the safety of battery is improved, certainThe problem of the problem of galvanic anode analysis lithium can be alleviated in degree and therefore caused cell safety hidden danger.
Embodiment six
Charging method provided by one based on the above embodiment, the embodiment of the present invention provide a kind of specific reality of charging methodExisting mode.
Specifically, battery composition used in the embodiment of the present invention are as follows: by cobalt-lithium oxide (LiCoO2) it is used as cathode, by stoneInk is used as anode, in addition diaphragm, electrolyte and pack case, are made up of techniques such as assembling, chemical conversion and ageings.
At 25 DEG C, expiring for the battery fills charging capacity for 3500mAh, charge cutoff voltage V0For 4.4V, the charging of batteryCut-off current is 0.01C.Also, the maximum charging current that the battery measured anode at 25 DEG C does not analyse lithium is 0.7C, anodeThe minimum anode potential for not analysing lithium is -50mV.
It charges to the battery, which includes: the first charging stage and the second charging stage:
Specifically, in each charging sub-stage in the first charging stage, the charging process of invariable power charging stage are as follows:Invariable power charging is carried out with the firm power of 18.5W to battery, the charging duration of invariable power charging stage is 1s；In the first chargingIn each charging sub-stage in stage, the discharge process in constant-current discharge stage are as follows: battery is carried out with the constant current of 0.01CConstant-current discharge, when electric discharge in constant-current discharge stage a length of 0.1s；
Above-mentioned charging sub-stage is carried out in the first charging stage circulation, until the voltage of battery reaches charge cutoff voltage4.4V, the first charging stage terminate；
After first charging stage terminated, stewing process carried out to battery, the when a length of 10s in stewing process stage, later,The charge cutoff voltage 4.4V of constant-current charge to battery is carried out with the constant current of 0.7C to battery；
Start to carry out for the second charging stage, constant-voltage charge is carried out with the constant voltage of 4.4V to battery, until the electricity of batteryStream reaches charging cut-off current 0.01C.
Provided charging method charges the battery through the embodiment of the present invention, and there is no analysis lithium is existing for galvanic anodeAs, also, battery is charged to battery and fills the time used in the 80% of charging capacity completely for 44.9min.In the embodiment of the present invention,In the first charging stage, cyclic process to the charging sub-stage that battery be made of invariable power charging and constant-current discharge is logicalIt crosses invariable power charging and powerful charging is carried out to battery, to promote charging rate；And the constant current in each charging sub-stage is putElectricity can make the anode potential of battery raise, thus, so that the anode potential fall of next charging subcycle battery when startingLow is smaller, in turn, so that battery duration under the minimum anode potential that anode does not analyse lithium is shorter, alleviates batteryAnode analyses lithium phenomenon, also, the embodiment of the present invention improves the charging rate of battery, the safety of battery is improved, certainThe problem of the problem of galvanic anode analysis lithium can be alleviated in degree and therefore caused cell safety hidden danger.
Embodiment seven
Charging method provided by one based on the above embodiment, the embodiment of the present invention provide a kind of specific reality of charging methodExisting mode.
Specifically, battery composition used in the embodiment of the present invention are as follows: by cobalt-lithium oxide (LiCoO2) it is used as cathode, by stoneInk is used as anode, in addition diaphragm, electrolyte and pack case, are made up of techniques such as assembling, chemical conversion and ageings.
At 25 DEG C, expiring for the battery fills charging capacity for 3500 milliampere hour mAh, charge cutoff voltage V0For 4.4V, batteryCharging cut-off current be 0.1C.Also, the maximum charging current that the battery measured anode at 25 DEG C does not analyse lithium is 0.7C,The minimum anode potential that anode does not analyse lithium is -50mV.
It charges to the battery, which includes: the first charging stage and the second charging stage:
Specifically, in each charging sub-stage in the first charging stage, the charging process of invariable power charging stage are as follows:Invariable power charging is carried out with the firm power of 18.5W to battery, the charging duration of invariable power charging stage is 5s；In the first chargingIn each charging sub-stage in stage, the discharge process in constant-current discharge stage are as follows: the constant current for being 0 with current value to batteryCarry out constant-current discharge, when electric discharge in constant-current discharge stage a length of 1s；
Above-mentioned charging sub-stage is carried out in the first charging stage circulation, until the voltage of battery reaches charge cutoff voltage4.4V, the first charging stage terminate；
After first charging stage terminated, stewing process carried out to battery, the when a length of 1s in stewing process stage, later,The charge cutoff voltage 4.4V of constant-current charge to battery is carried out with the constant current of 0.7C to battery；
Start to carry out for the second charging stage, constant-voltage charge is carried out with the constant voltage of 4.4V to battery, until the electricity of batteryStream reaches charging cut-off current 0.1C.
Provided charging method charges the battery through the embodiment of the present invention, and there is no analysis lithium is existing for galvanic anodeAs, also, battery is charged to battery and fills the time used in the 80% of charging capacity completely for 47.6min.In the embodiment of the present invention,In the first charging stage, cyclic process to the charging sub-stage that battery be made of invariable power charging and constant-current discharge is logicalIt crosses invariable power charging and powerful charging is carried out to battery, to promote charging rate；And the constant current in each charging sub-stage is putElectricity can make the anode potential of battery raise, thus, so that the anode potential fall of next charging subcycle battery when startingLow is smaller, in turn, so that battery duration under the minimum anode potential that anode does not analyse lithium is shorter, alleviates batteryAnode analyses lithium phenomenon, also, the embodiment of the present invention improves the charging rate of battery, the safety of battery is improved, certainThe problem of the problem of galvanic anode analysis lithium can be alleviated in degree and therefore caused cell safety hidden danger.
Embodiment eight
Charging method provided by one based on the above embodiment, the embodiment of the present invention provide a kind of specific reality of charging methodExisting mode.
Specifically, battery composition used in the embodiment of the present invention are as follows: by cobalt-lithium oxide (LiCoO2) it is used as cathode, by stoneInk is used as anode, in addition diaphragm, electrolyte and pack case, are made up of techniques such as assembling, chemical conversion and ageings.
At 25 DEG C, expiring for the battery fills charging capacity for 3500mAh, charge cutoff voltage V0For 4.4V, the charging of batteryCut-off current is 0.05C.Also, the maximum charging current that the battery measured anode at 25 DEG C does not analyse lithium is 0.7C, anodeThe minimum anode potential for not analysing lithium is -50mV.
It charges to the battery, which includes: the first charging stage and the second charging stage:
Specifically, in each charging sub-stage in the first charging stage, the charging process of invariable power charging stage are as follows:Invariable power charging is carried out with the firm power of 18.5W to battery, the charging duration of invariable power charging stage is 3s；In the first chargingIn each charging sub-stage in stage, the discharge process in constant-current discharge stage are as follows: battery is carried out with the constant current of 0.1CConstant-current discharge, when electric discharge in constant-current discharge stage a length of 0.5s；
Above-mentioned charging sub-stage is carried out in the first charging stage circulation, until the voltage of battery reaches charge cutoff voltage4.4V, the first charging stage terminate；
After first charging stage terminated, stewing process carried out to battery, the when a length of 30s in stewing process stage, later,The charge cutoff voltage 4.4V of constant-current charge to battery is carried out with the constant current of 0.7C to battery；
Start to carry out for the second charging stage, constant-voltage charge is carried out with the constant voltage of 4.4V to battery, until the electricity of batteryStream reaches charging cut-off current 0.05C.
Provided charging method charges the battery through the embodiment of the present invention, and there is no analysis lithium is existing for galvanic anodeAs, also, battery is charged to battery and fills the time used in the 80% of charging capacity completely for 44.9min.In the embodiment of the present invention,In the first charging stage, cyclic process to the charging sub-stage that battery be made of invariable power charging and constant-current discharge is logicalIt crosses invariable power charging and powerful charging is carried out to battery, to promote charging rate；And the constant current in each charging sub-stage is putElectricity can make the anode potential of battery raise, thus, so that the anode potential fall of next charging subcycle battery when startingLow is smaller, in turn, so that battery duration under the minimum anode potential that anode does not analyse lithium is shorter, alleviates batteryAnode analyses lithium phenomenon, also, the embodiment of the present invention improves the charging rate of battery, the safety of battery is improved, certainThe problem of the problem of galvanic anode analysis lithium can be alleviated in degree and therefore caused cell safety hidden danger.
Embodiment nine
Charging method provided by one based on the above embodiment, the embodiment of the present invention, which further provides, realizes that the above method is realApply the Installation practice of each step and method in example.
Referring to FIG. 6, its functional block diagram for charging unit provided by the embodiment of the present invention.As shown in figure 5, the dressThe method for being applied to charge the battery is set, charging includes the first charging stage and the second charging stage；
Device includes charhing unit 61 and discharge cell 62；
First charging stage included at least two charging sub-stages, and in each charging sub-stage, charhing unit 61 is used forInvariable power charging is carried out to battery, discharge cell 62 is used to carry out constant-current discharge to battery；
In the second charging stage, charhing unit 61 is also used to carry out constant-voltage charge to battery.
Specifically, the device further includes acquiring unit 63 in the embodiment of the present invention；
Acquiring unit 63, is used for:
Determine that galvanic anode does not occur to analyse the maximum charging current of lithium；
Do not occurred to analyse the maximum charging current of lithium and the blanking voltage of battery according to galvanic anode, obtains galvanic anode and do not send outThe maximum charge power of raw analysis lithium；
The maximum charge power of analysis lithium, the charging function that the acquisition invariable power charging stage uses does not occur according to galvanic anodeRate.
During a concrete implementation, the charge power that the invariable power charging stage uses is more than or equal to battery sunPole does not occur to analyse the maximum charge power of lithium.
In the embodiment of the present invention, acquiring unit 63 is specifically used for determining that galvanic anode does not occur to analyse the maximum charging current of lithiumWhen, it is specifically used for:
It is charged the battery respectively at least two candidate electric currents；
Detect whether galvanic anode occurs analysis lithium in each charging process；
Determine galvanic anode do not occur during the charging process analyse lithium candidate electric current set, and by candidate electric current set mostThe candidate electric current of big one does not occur to analyse the maximum charging current of lithium as galvanic anode.
Specifically, in the embodiment of the present invention, after the first charging stage, before the second charging stage, charhing unit 61, alsoFor；
Stewing process is carried out to battery；
Constant-current charge is carried out to the battery Jing Guo stewing process, until the voltage of battery reaches charge cutoff voltage.
Method shown in FIG. 1 is able to carry out by each unit in this present embodiment, the part that the present embodiment is not described in detail,It can refer to the related description to Fig. 1.
One technical solution of the embodiment of the present invention has the advantages that
Charging unit provided in an embodiment of the present invention is applied to the method charged the battery, and charging includes the first chargingStage and the second charging stage；Device includes charhing unit and discharge cell, and the first charging stage included at least two chargingStage, in each charging sub-stage, charhing unit be used for battery carry out invariable power charging, discharge cell be used for battery intoRow constant-current discharge；Charhing unit was also used in the second charging stage, carried out constant-voltage charge to battery.In the embodiment of the present invention,In the first charging stage, cyclic process to the charging sub-stage that battery be made of invariable power charging and constant-current discharge is logicalIt crosses invariable power charging and powerful charging is carried out to battery, to promote charging rate；And the constant current in each charging sub-stage is putElectricity can make the anode potential of battery raise, thus, so that the anode potential fall of next charging subcycle battery when startingLow is smaller, in turn, so that battery duration under the minimum anode potential that anode does not analyse lithium is shorter, alleviates batteryAnode analyses lithium phenomenon, also, the embodiment of the present invention improves the charging rate of battery, the safety of battery is improved, certainThe problem of the problem of galvanic anode analysis lithium can be alleviated in degree and therefore caused cell safety hidden danger.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided by the present invention, it should be understood that disclosed system, device and method can be withIt realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unitIt divides, only a kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or groupPart can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shownOr the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit it is indirectCoupling or communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unitThe component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multipleIn network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unitIt is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated listMember both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit being realized in the form of SFU software functional unit can store and computer-readable deposit at oneIn storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computerIt is each that device (can be personal computer, server or network equipment etc.) or processor (Processor) execute the present inventionThe part steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic or disk etc. it is variousIt can store the medium of program code.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the inventionWithin mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.