The content of the invention
Based on this, it is necessary to provide a kind of discharge control method and dress for the service life of batteries of electric automobile is delayedPut.
A kind of discharge control method, is applied to electric automobile, and methods described includes：
Gather the battery information of battery in the electric automobile；
Whether the electricity for detecting the battery according to the battery information meets outside need for electricity；
If so, then judging the pre-set interval belonging to the temperature value of battery that is included in the battery information；
The selection strategy that discharges corresponding with affiliated pre-set interval makes the battery discharging.
Wherein in one embodiment, the battery information includes the voltage of cell in the battery, the sideMethod also includes：
Detect the voltage of the cell whether less than or equal to default protection voltage；
If so, then controlling the battery to terminate electric discharge.
Wherein in one embodiment, the pre-set interval includes being less than the first interval of predetermined minimum temperature value and is more thanIf the second interval of predetermined maximum temperature value and the involvement divided between the predetermined minimum temperature value and maximum temperature valuesContinuous interval.
Wherein in one embodiment, the battery corresponds to first interval, the continuum and second being arranged in orderInterval discharge current changes from large to small again from small to large.
Wherein in one embodiment, the predetermined minimum temperature value is zero degree, and the predetermined maximum temperature value is 35 degree.
Wherein in one embodiment, the continuum includes 0-10 DEG C, 10-30 DEG C and 30-35 DEG C, the selection withThe affiliated pre-set interval strategy that discharges accordingly includes the battery discharging：
When affiliated pre-set interval is the first interval less than zero degree, then the discharge current for making the battery is0.1C；
When affiliated pre-set interval is 0-10 DEG C, then the discharge current for making the battery is 0.2C；
When affiliated pre-set interval is 10-30 DEG C, then the discharge current for making the battery is 0.3C；
When affiliated pre-set interval is 30-35 DEG C, then the discharge current for making the battery is 0.2C；
When affiliated pre-set interval is the second interval more than 35 DEG C, then the temperature and the storage of the battery are reducedThe discharge current of battery.
Wherein in one embodiment, the discharge current bag of the temperature and the battery for reducing the batteryInclude：
The temperature of the battery is reduced to 30-35 DEG C, and the discharge current of the battery is reduced to by 0.2C0.1C；Or
The temperature of the battery is reduced to 30-35 DEG C, and stops reducing the discharge current of the battery；Or
The temperature of the battery is reduced to 30-35 DEG C, and is reduced in the discharge current for detecting the batteryDuring less than 0.2C, the discharge current of the battery is set to increase to 0.2C.
In the above discharge control method, when the accumulator electric-quantity in electric automobile can meet outside need for electricityWhen, then the bulk temperature according to battery determines corresponding pre-set interval, and the corresponding electric discharge strategy of selection makes battery discharging,So that battery can be discharged with most suitable discharge current at different temperature, so as in delaying electric automobileThe service life of battery.
A kind of discharge control device, described device is connected with the battery in electric automobile, and described device includes：
Acquisition module, the battery information for gathering battery in the electric automobile；
Whether electric power detection module, the electricity for detecting the battery according to the battery information meets outside electricity consumptionDemand；
Judge module, for the battery for judging to be included in the battery information temperature value belonging to pre-set interval；
Selecting module, for selecting the strategy that discharges corresponding with affiliated pre-set interval to make the battery discharging.
Wherein in one embodiment, described device also includes：
Voltage detection module, for detecting the voltage of the cell whether less than or equal to default protection voltage；
Control module, the voltage for being detected in the voltage detection module is yes, controls the battery to terminate electric discharge.
Wherein in one embodiment, the pre-set interval includes being less than the first interval of predetermined minimum temperature value and is more thanIf the second interval of predetermined maximum temperature value and the involvement divided between the predetermined minimum temperature value and maximum temperature valuesContinuous interval.
In the above discharge control device, when the accumulator electric-quantity in electric automobile can meet outside need for electricityWhen, then the bulk temperature according to battery determines corresponding pre-set interval, and the corresponding electric discharge strategy of selection makes battery discharging,So that battery can be discharged with most suitable discharge current at different temperature, so as in delaying electric automobileThe service life of battery.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and ExamplesThe present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, andIt is not used in the restriction present invention.
As shown in figure 1, the discharge control method of an embodiment includes step S120 to step S180.
Step S120, the battery information of battery in collection electric automobile；
Whether step S140, the electricity for detecting battery according to battery information meets outside need for electricity；
Step S160, if so, then judging the pre-set interval belonging to the temperature value of battery that is included in battery information；
Step S180, selects the strategy that discharges corresponding with affiliated pre-set interval to make battery discharging.
In the above discharge control method, when the accumulator electric-quantity in electric automobile can meet outside need for electricityWhen, then the bulk temperature according to battery determines corresponding pre-set interval, and the corresponding electric discharge strategy of selection makes battery discharging,So that battery can be discharged with most suitable discharge current at different temperature, so as in delaying electric automobileThe service life of battery.
Wherein, the battery information of the battery of step S120 collections includes the temperature of cell, voltage etc. in batteryInformation.
When with outside need for electricity, the V2G/V2H systems of electric automobile can be divided outside need for electricity firstAnalysis, and detect whether the electricity of battery meets outside need for electricity according to battery information.If meeting demand, electricity can be madeElectrical automobile can be connected offer power supply with external discharge equipment.
If the not enough power supply of battery is to meet during outside need for electricity in single electric automobile, according to electric automobileLocal mesh information, the V2G/V2H systems of the electric automobile can send use by wireless WIFI modes to other electric automobilesElectric demand, if the electricity of battery meets outside need for electricity in two or more electric automobiles, can control two orBattery discharges jointly in above electric automobile.
In discharge process, if battery over-discharge, it is unfavorable for the extension of battery life.Therefore, such as Fig. 2 institutesShow, the discharge control method of another embodiment also includes step S191 and step S192.
Step S191, detects whether the voltage of cell is less than or equal to default protection voltage；
Step S192, if so, then control battery terminates electric discharge.
In the discharge process of battery, if in battery the voltage of cell dropped in discharge process it is defaultProtection voltage when, then need terminate battery discharging to prevent its overdischarge.
Wherein, pre-set interval includes the first interval less than predetermined minimum temperature value and more than predetermined maximum temperature value theTwo some continuums that are interval and being divided between predetermined minimum temperature value and maximum temperature values.
For the first interval, continuum and the second interval that are arranged in order, the discharge current of battery is being arranged in orderInterval under, first change from small to big and changed from large to small again.This transformation is adapted to the interval requirement of different temperatures, makes storageBattery has the discharge current being best suitable under said temperature interval, so as to continue the life-span of battery.
In the present embodiment, predetermined minimum temperature value is zero degree, and predetermined maximum temperature value is 35 degree.The present embodiment is by continuumBetween be divided into 0-10 DEG C, 10-30 DEG C and 30-35 DEG C.Wherein, step S180 selects plan of discharging corresponding with affiliated pre-set intervalSlightly making battery discharging includes：
When affiliated pre-set interval is the first interval less than zero degree, then the discharge current for making battery is 0.1C；
When affiliated pre-set interval is 0-10 DEG C, then the discharge current for making battery is 0.2C；
When affiliated pre-set interval is 10-30 DEG C, then the discharge current for making battery is 0.3C；
When affiliated pre-set interval is 30-35 DEG C, then the discharge current for making battery is 0.2C；
When affiliated pre-set interval is the second interval more than 35 DEG C, then the temperature of battery and putting for battery are reducedElectric current.
In the present embodiment, C is 5 hour rates of battery.
Wherein, default maximum temperature values can also be 45 degree or other values, and default maximum temperature values can be with rootIt is configured according to the temperature difference of different regions, is defined by meeting practical application.The setting of continuum is needed according to maximum temperatureAngle value is adjusted.Equally, default minimum temperature value needs reasonably to be set with default maximum temperature values.
It is pointed out that first interval less than zero degree, 0-10 DEG C, 10-30 DEG C, 30-35 DEG C and more than 35 DEG CSecond interval setting, for can be applied to domestic market optimal selection set.
In the present embodiment, when affiliated pre-set interval is the second interval more than 35 DEG C, then the temperature of battery is reducedDuring with the discharge current of battery, can specifically include three kinds of schemes.
In a kind of adaptable scheme, the temperature of battery can be reduced to 30-35 DEG C, and make putting for batteryElectric current is reduced to 0.1C by 0.2C.
In another implementation, when the temperature of battery is reduced into 30-35 DEG C, then stop reducing batteryDischarge current.Now, battery is discharged with a certain steady state value between 0.1C to 0.2C.
In another implementation, when the temperature of battery is reduced into 30-35 DEG C, battery can detectedDischarge current when decreasing below 0.2C, the discharge current of battery is increased to 0.2C.I.e. when the discharge current of batteryWhen being reduced to 0.1C or being more than a certain value of 0.1C less than 0.2C, then start to increase the discharge current of battery.
Below the present embodiment above charge control method is further described by taking electrocar actual measurement operating life data as an exampleThe benefit of the life of storage battery in electric automobile is continued.The electronic vapour of certain brand is applied to by this implementation above charge control methodCar (battery capacity 25kWh), after 5 years, 11.6 ten thousand kilometers of the distance travelled of electric automobile, remaining battery capacity SOC is69.7%, and the uniformity of all vehicles is very high, in all vehicles highest SOC and minimum the SOC difference 10% of battery withIt is interior, be conducive to delaying the service life of batteries of electric automobile；And the battery of the electric automobile using general discharge mode, 2 yearsHighest SOC and minimum SOC differences more than 36% are even more more during remaining battery capacity only has 46%, and batteries afterwards.
The discharge control device of an embodiment is illustrated in figure 3, it is connected with the battery in electric automobile, described deviceIncluding acquisition module 120, electric power detection module 140, judge module 160 and selecting module 180.
Acquisition module 120 is used to gather the battery information of battery in electric automobile；
Electric power detection module 140 is used to detect whether the electricity of battery meets outside need for electricity according to battery information；
Judge module 160 is used to judging the pre-set interval belonging to the temperature value of battery that is included in battery information；
Selecting module 180 is used for the selection strategy that discharges corresponding with affiliated pre-set interval makes battery discharging.
In the above discharge control device, when the accumulator electric-quantity in electric automobile can meet outside need for electricityWhen, then the bulk temperature according to battery determines corresponding pre-set interval, and the corresponding electric discharge strategy of selection makes battery discharging,So that battery can be discharged with most suitable discharge current at different temperature, so as in delaying electric automobileThe service life of battery.
Wherein, the battery information of the battery of the collection of acquisition module 120 includes temperature, the voltage of cell in batteryEtc. information.
When with outside need for electricity, the V2G/V2H systems of electric automobile can be divided outside need for electricity firstAnalysis, and detect whether the electricity of battery meets outside need for electricity according to battery information.If meeting demand, electricity can be madeElectrical automobile can be connected offer power supply with external discharge equipment.
If the not enough power supply of battery is to meet during outside need for electricity in single electric automobile, according to electric automobileLocal mesh information, the V2G/V2H systems of the electric automobile can send use by wireless WIFI modes to other electric automobilesElectric demand, if the electricity of battery meets outside need for electricity in two or more electric automobiles, can control two orBattery discharges jointly in above electric automobile.
In discharge process, if battery over-discharge, it is unfavorable for the extension of battery life.Therefore, such as Fig. 4 institutesShow, the discharge control device of another embodiment also includes voltage detection module 191 and control module 192.
Whether voltage detection module 191 is used to detect the voltage of cell less than or equal to default protection voltage；
It is yes that control module 192 is used in the voltage of voltage detection module detection, and control battery terminates electric discharge.
In the discharge process of battery, if in battery the voltage of cell dropped in discharge process it is defaultProtection voltage when, then need terminate battery discharging to prevent its overdischarge.
Wherein, pre-set interval includes the first interval less than predetermined minimum temperature value and more than predetermined maximum temperature value theTwo some continuums that are interval and being divided between predetermined minimum temperature value and maximum temperature values.
For the first interval, continuum and the second interval that are arranged in order, the discharge current of battery is being arranged in orderInterval under, first change from small to big and changed from large to small again.This transformation is adapted to the interval requirement of different temperatures, makes storageBattery has the discharge current being best suitable under said temperature interval, so as to continue the life-span of battery.
In the present embodiment, predetermined minimum temperature value is zero degree, and predetermined maximum temperature value is 35 degree.The present embodiment is by continuumBetween be divided into 0-10 DEG C, 10-30 DEG C and 30-35 DEG C.Wherein, step S180 selects plan of discharging corresponding with affiliated pre-set intervalSlightly making battery discharging includes：
When affiliated pre-set interval is the first interval less than zero degree, then the discharge current for making battery is 0.1C；
When affiliated pre-set interval is 0-10 DEG C, then the discharge current for making battery is 0.2C；
When affiliated pre-set interval is 10-30 DEG C, then the discharge current for making battery is 0.3C；
When affiliated pre-set interval is 30-35 DEG C, then the discharge current for making battery is 0.2C；
When affiliated pre-set interval is the second interval more than 35 DEG C, then the temperature of battery and putting for battery are reducedElectric current.
In the present embodiment, C is 5 hour rates of battery.
Wherein, default maximum temperature values can also be 45 degree or other values, and default maximum temperature values can be with rootIt is configured according to the temperature difference of different regions, is defined by meeting practical application.The setting of continuum is needed according to maximum temperatureAngle value is adjusted.Equally, default minimum temperature value needs reasonably to be set with default maximum temperature values.
It is pointed out that first interval less than zero degree, 0-10 DEG C, 10-30 DEG C, 30-35 DEG C and more than 35 DEG CSecond interval setting, for can be applied to domestic market optimal selection set.
In the present embodiment, when affiliated pre-set interval is the second interval more than 35 DEG C, then the temperature of battery is reducedDuring with the discharge current of battery, can specifically include three kinds of schemes.
In a kind of adaptable scheme, the temperature of battery can be reduced to 30-35 DEG C, and make putting for batteryElectric current is reduced to 0.1C by 0.2C.
In another implementation, when the temperature of battery is reduced into 30-35 DEG C, then stop reducing batteryDischarge current.Now, battery is discharged with a certain steady state value between 0.1C to 0.2C.
In another implementation, when the temperature of battery is reduced into 30-35 DEG C, battery can detectedDischarge current when decreasing below 0.2C, the discharge current of battery is increased to 0.2C.I.e. when the discharge current of batteryWhen being reduced to 0.1C or being more than a certain value of 0.1C less than 0.2C, then start to increase the discharge current of battery.
Wherein, above discharge control device can be mounted to V2G/V2H systems and BMS (cell tubes in electric automobileReason system) combination.BMS includes main control module and from control module, is high-speed traffic, main control module and can pass through from control moduleCAN is connected.It is connected with battery from control module, the battery information of battery can be gathered, main control module can receives electricityPond information makes the electric quantity balancing of each cell in battery.
BMS can be connected by RS485 buses with V2G/V2H systems, and V2G/V2H systems can receive the electricity of BMS collectionsPond information, and whether the SOC of analysis battery disclosure satisfy that outside need for electricity according to this.If it is not, according to electric automobileLocal mesh information, need for electricity can be sent to other electric automobiles by wireless WIFI modes.
During battery discharging, if the voltage of certain cell in the battery of BMS collections is less than defaultProtection voltage, when V2G/V2H systems receive the information, then immediately control battery stop electric discharge.
Below the present embodiment above charge control method is further described by taking electrocar actual measurement operating life data as an exampleThe benefit of the life of storage battery in electric automobile is continued.The electronic vapour of certain brand is applied to by this implementation above charge control methodCar (battery capacity 25kWh), after 5 years, 11.6 ten thousand kilometers of the distance travelled of electric automobile, remaining battery capacity SOC is69.7%, and the uniformity of all vehicles is very high, in all vehicles highest SOC and minimum the SOC difference 10% of battery withIt is interior, be conducive to delaying the service life of batteries of electric automobile；And the battery of the electric automobile using general discharge mode, 2 yearsHighest SOC and minimum SOC differences more than 36% are even more more during remaining battery capacity only has 46%, and batteries afterwards.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned realityApply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not depositedIn contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneouslyCan not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the artSay, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the inventionScope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.