CN111416408A - Charger and charging control method thereof - Google Patents
Charger and charging control method thereofDownload PDFInfo
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- CN111416408A CN111416408ACN202010264639.6ACN202010264639ACN111416408ACN 111416408 ACN111416408 ACN 111416408ACN 202010264639 ACN202010264639 ACN 202010264639ACN 111416408 ACN111416408 ACN 111416408A
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- 238000007600chargingMethods0.000titleclaimsabstractdescription61
- 238000000034methodMethods0.000titleclaimsabstractdescription20
- 238000001514detection methodMethods0.000claimsabstractdescription32
- 230000008569processEffects0.000claimsdescription9
- 238000010586diagramMethods0.000description3
- WHXSMMKQMYFTQS-UHFFFAOYSA-NLithiumChemical compound[Li]WHXSMMKQMYFTQS-UHFFFAOYSA-N0.000description2
- 238000010277constant-current chargingMethods0.000description2
- 230000000694effectsEffects0.000description2
- 229910052744lithiumInorganic materials0.000description2
- 208000032953Device battery issueDiseases0.000description1
- 230000002411adverseEffects0.000description1
- 230000009286beneficial effectEffects0.000description1
- 230000008859changeEffects0.000description1
- 230000000875corresponding effectEffects0.000description1
- 230000001419dependent effectEffects0.000description1
- 230000005611electricityEffects0.000description1
- 238000012986modificationMethods0.000description1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Technical Field
The invention relates to the field of automatic mechanical equipment, in particular to power consumption management of industrial vehicles.
Background
Industrial vehicles refer to power-driven motor vehicles used to carry, push, pull, lift, stack, or palletize various loads. Common industrial vehicles are forklifts, side-lifts, tractors, trucks, fork lifts, and the like.
The energy sources of the industrial vehicles in operation are often driven by electric energy, and a chinese patent document with publication number CN200820030930.1 discloses a storage battery for the industrial vehicles, which provides electric energy for the operation of the vehicles, and an operator regularly relies on a charger to perform charging operation on the storage battery.
The accumulator is a product which can be used for a long time and can be recycled for many times. During the use process, the battery performance may be unstable, the battery activity may change, and even the battery may be damaged. Under the condition that the working state of the battery is unstable, the damage degree of the battery is aggravated by continuous charging of the charger, even the battery is heated and burnt, and the transportation safety is adversely affected.
Disclosure of Invention
The invention aims to provide a charger and a charging control method thereof, which execute different charging strategies under the condition of different battery performances, improve the power utilization safety and protect the charger and a storage battery.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides a charger, contains the plug of being connected with the power and the connector of being connected with the battery, include the output that is used for the output voltage electric current on the connector, this kind of charger still includes to be connected the plug with main part between the connector, the main part contains:
the current output adjusting module is used for adjusting the output voltage of the charger to the storage battery;
the voltage output adjusting module is used for adjusting the output current of the charger to the storage battery;
the alternating module is used for converting alternating current into direct current;
the battery voltage detection module is used for detecting the current voltage value of the storage battery in real time;
when the battery voltage detection module detects that the voltage value of the storage battery is in a low voltage interval, the current output adjustment module adjusts the output current to be low output current, and when the battery voltage detection module detects that the voltage value of the storage battery is in a high voltage interval, the current output adjustment module adjusts the output current to be high output current.
Preferably, when the battery voltage detection module detects that the voltage value of the storage battery is in a low voltage interval, a medium voltage interval and a high voltage interval, the current output adjustment module adjusts the output current to a low output current, a medium output current and a full power charging current with the highest current value.
Preferably, the battery charger further includes a timing module, wherein the voltage output adjustment module outputs an output voltage of a fully charged battery during a charge initialization period, the timing module starts timing, the current output detection module detects an output current value after a time of the output voltage reaches a predetermined value, and the voltage output adjustment module immediately adjusts the output voltage to zero if an actually output current value is lower than the predetermined value.
Preferably, the connector includes a communication terminal for receiving data transmitted from a BMS system of the battery, the main body further includes a temperature reading module for reading a real-time temperature value of the battery transmitted from the BMS system through the communication terminal, and the current output module adjusts the magnitude of the output current based on the real-time temperature value.
Preferably, when the temperature is lower than the lowest working threshold, the current output module outputs zero current, when the temperature is between the lowest working threshold and the low temperature set value, the current output adjusting module outputs a low current value, and when the temperature is higher than the low temperature set value, the current output adjusting module outputs a high current value.
A charging control method of a charger comprises the following steps:
s01, a battery judgment step;
a voltage output adjusting module in the main body adjusts the output voltage into a voltage signal of full charge of the battery, a current output detecting module detects the output current, if no current is output, the main body immediately stops charging the storage battery, and if current is output, the next step is carried out;
s02, voltage detection;
the battery voltage detection module detects the voltage of the storage battery, and when the voltage is respectively positioned in a low voltage interval and a middle voltage interval, the current output adjustment module respectively adjusts the charging current into a low output current and a middle output current, wherein the current value of the middle output current is larger than that of the low output current;
s03, a full-power charging step;
the battery voltage detection module continues to detect the voltage of the storage battery, and when the voltage of the storage battery is located in a high voltage interval, the current output adjustment module adjusts the charging current into a full-power output current, wherein the current value of the full-power output current is larger than that of the medium output current.
Preferably, in step S01, the timing module counts a time when the voltage output module outputs the voltage signal indicating that the battery is fully charged, and the current output detection module detects the output current after a predetermined time.
Preferably, in the timing process of the timing module, the predetermined time is 2 seconds to 8 seconds.
As a preferable aspect of the present invention, after S01, before S02, there is further a temperature detection step; in the step, the temperature reading module reads the real-time temperature of the storage battery sent by the communication terminal, and adjusts the output current according to the temperature.
Preferably, when the temperature is lower than the lowest working threshold, the current output module outputs zero current, when the temperature is between the lowest working threshold and the low temperature set value, the current output adjusting module outputs a low current value, and when the temperature is higher than the low temperature set value, the current output adjusting module outputs a high current value.
Preferably, in the step S02 and the step S03, the current output detection module detects the output current in real time, and the main body immediately cuts off the charging output function of the main body when the output current is lower than a safety threshold.
In conclusion, the invention has the following beneficial effects:
1. the charging process of the charger to the storage battery comprises a plurality of stages, and the electricity utilization strategies of each stage are different, so that the charging safety is protected to the greatest extent.
2. In the charging initialization process, the state of the storage battery is judged by detecting the current, so that the danger caused by forced charging under the condition of storage battery failure is avoided.
3. The charging efficiency is optimized and the safety is considered by adjusting the charging current under the states of different temperatures and different voltages of the storage battery.
4. If the storage battery breaks down suddenly in the charging process, the charger can stop charging immediately.
Description of the drawings:
FIG. 1 is a schematic diagram of the hardware configuration of embodiment 1;
fig. 2 is a schematic diagram of the module of fig. 1.
In the figure: 4. plug, 5, main part, 6, connector.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Embodiment 1, a charger, as shown in fig. 1, comprises three parts, aplug 4 for connecting a power supply, amain body 5 as a main part, each electric appliance installed in an inner cavity of a housing of themain body 5, and aconnector 6 for connecting with a storage battery (not shown) of a vehicle. In this embodiment, theconnector 6 is a three-core plug-in, in which the pin 1 and the pin 2 are output terminals of the charger, and are used for outputting the voltage and current during charging, and meanwhile, the detection of the voltage and current is also completed by the pin 1 and the pin 2. And pin 3 in the figure is a wire communication for receiving communication signals from the battery BMS. BMS is an abbreviation of battery management SYSTEM (battery SYSTEM).
As shown in fig. 2, fig. 2 is a logic diagram of each module of the charger. It should be noted that, in practical applications, each functional module is implemented by means of each digital circuit. Such as the alternating module of fig. 2, which functions to convert the alternating current to direct current that is acceptable to the battery. Which relies on a mature alternating circuit to implement. The composition of the specific digital circuit and the connection and arrangement of each electronic component are the content of the prior art and are not the inventive part of this document, and those skilled in the art can realize this by means of the text explanation of this embodiment, and detailed description is not given here.
In this embodiment, the charging process is divided into four stages, which are respectively the first stage: battery state detection stage, second stage: temperature detection control charging stage, third stage: the voltage detection control phase, the fourth phase is a full power charging phase, which is described in detail below.
In the first stage, the battery state detection stage, the voltage output adjusting module in the main body adjusts the output voltage to be a voltage signal of full battery and lasts for a period of time. It should be noted that the type of the storage battery matched with one charging wire is often fixed, for example, a certain charging wire can only match with a storage battery with a 48V specification, and the charging wire is not suitable for storage batteries with other voltage specifications. This embodiment exemplifies a 48V battery.
In this stage, the voltage signal of the full charge of the battery corresponds to a value of 54.6V, i.e., the voltage output adjustment module adjusts the output voltage to 54.6V in this stage for a predetermined time. The predetermined time is generally 2 to 8 seconds, and in the present embodiment, is set to 5 seconds. And after the timing module counts 5 seconds, the current detection module detects the current of the output end, if no current is output at the moment, the battery is proved to be damaged and cannot be charged, and the charger immediately cuts off the charging function. If the charger has current output, the state of the storage battery is normal, and the charger enters the next charging stage.
It should be noted here that the output of the charging voltage and current and the detection of the voltage and current are both accomplished by means of pin No. 1 and pin No. 2 in fig. 1.
The next phase, the second phase, is the temperature sensing control charging phase. At this stage, the battery BMS system transmits a battery internal environment temperature parameter, and the main body performs a corresponding action according to the parameter. Specifically, the temperature parameter is sent to the temperature reading module through the communication terminal in fig. 2, i.e., pin 3 in fig. 1. When the temperature is less than-5 ℃, the charger does not work, the display module is an indicator light, and the green light is turned on. When the temperature is more than or equal to-5 ℃ and less than or equal to 0 ℃, the charger enters a low-current working state, the charging current is not more than 0.3A, and whether the temperature is more than 0 ℃ is detected every 5 minutes. If the temperature does not rise to more than 0 ℃, the charging with small current is continued until the temperature rises to more than 0 ℃. When the temperature is higher than 0 ℃, the charger enters the next stage to work.
This is because many batteries, for material reasons, have temperature-dependent operating states and safety. For example, lithium batteries have a problem that the activity of lithium electrons is reduced in a low-temperature environment, and when the temperature is too low, charging is performed using a large current, which causes a series of safety problems.
When the temperature is above a specified temperature, such as > 0 ℃ as described above, the charging process then enters a third stage, the voltage detection control stage.
In this phase, the battery voltage detection module detects the voltage in the output terminal, which is the voltage of the secondary battery. The same is achieved by the No. 1 pin and the No. 2 pin. The charger detects the voltage of the storage battery, when the voltage is more than 0V and less than 23V, the charger is switched into an ultra-low voltage small current constant current charging mode, the current output adjusting module controls the charging current in a small mode, and the charging current is not more than 0.3A.
When the voltage is detected to rise to be more than or equal to 23V and less than 33V, the charger is switched into a low-voltage low-current constant-current charging mode, and the charging current is not more than 2A.
When the voltage is detected to be increased to be more than or equal to 33V, the fourth stage is entered, namely the full-strategy charging stage, namely the normal charging mode is entered, and the battery is fully charged by using the rated charging current.
In addition, in the processes of the second, third and fourth stages, the current output detection module detects the charging current in real time, and if the sudden charging current is lower than a set safety threshold, for example, zero, a certain fault is likely to occur to the storage battery, the voltage output adjustment module immediately adjusts the voltage to zero, that is, the charger immediately cuts off the charging output function of the charger, protects each component, and improves safety.
Claims (11)
1. The utility model provides a charger, contains plug (4) of being connected with the power and connector (6) of being connected with the battery, contain the output that is used for the output voltage electric current on connector (6), its characterized in that: this kind of charger still contains and is connected main part (5) between plug (4) and connector (6), main part (5) contain: the current output adjusting module is used for adjusting the output voltage of the charger to the storage battery; the voltage output adjusting module is used for adjusting the output current of the charger to the storage battery; the alternating module is used for converting alternating current into direct current; the battery voltage detection module is used for detecting the current voltage value of the storage battery in real time; when the battery voltage detection module detects that the voltage value of the storage battery is in a low voltage interval, the current output adjustment module adjusts the output current to be low output current, and when the battery voltage detection module detects that the voltage value of the storage battery is in a high voltage interval, the current output adjustment module adjusts the output current to be high output current.
2. A charger according to claim 1, wherein: when the battery voltage detection module detects that the voltage value of the storage battery is respectively located in a low voltage interval, a medium voltage interval and a high voltage interval, the current output adjustment module adjusts the output current to be the low output current, the medium output current and the full-power charging current with the highest current value.
3. A charger according to claim 1, wherein: the charging device further comprises a timing module, wherein during the charging initialization period, the voltage output adjusting module outputs the output voltage of the full battery, the timing module starts timing, when the time of the output voltage reaches a preset value, the current output detecting module detects the output current value, and if the actually output current value is lower than the preset value, the voltage output adjusting module immediately adjusts the output voltage to zero.
4. A charger according to claim 1, wherein: the connecting port (6) comprises a communication end, the communication end is used for receiving data sent by a BMS system of the storage battery, the main body (5) further comprises a temperature reading module, the temperature reading module reads a real-time temperature value of the storage battery sent by the BMS system through the communication end, and the current output module adjusts the size of output current based on the real-time temperature value.
5. A charger according to claim 4, characterized in that: when the temperature is lower than the lowest working threshold, the output current of the current output module is zero, when the temperature is between the lowest working threshold and the low-temperature set value, the output current of the current output adjusting module is low, and when the temperature is higher than the low-temperature set value, the output current of the current output adjusting module is high.
6. The charging control method of a charger according to any one of claims 1 to 5, comprising the steps of: s01, a battery judgment step; a voltage output adjusting module in the main body adjusts the output voltage into a voltage signal of full charge of the battery, a current output detecting module detects the output current, if no current is output, the main body immediately stops charging the storage battery, and if current is output, the next step is carried out; s02, voltage detection; the battery voltage detection module detects the voltage of the storage battery, and when the voltage is respectively positioned in a low voltage interval and a middle voltage interval, the current output adjustment module respectively adjusts the charging current into a low output current and a middle output current, wherein the current value of the middle output current is larger than that of the low output current; s03, a full-power charging step; the battery voltage detection module continues to detect the voltage of the storage battery, and when the voltage of the storage battery is located in a high voltage interval, the current output adjustment module adjusts the charging current into a full-power output current, wherein the current value of the full-power output current is larger than that of the medium output current.
7. The charging control method of a charger according to claim 6, characterized in that: in step S01, the timing module times the voltage output module outputs the voltage signal indicating that the battery is fully charged, and the current output detection module detects the output current only after a predetermined time.
8. The charging control method of a charger according to claim 7, characterized in that: in the timing process of the timing module, the preset time is 2-8 seconds.
9. The charging control method of a charger according to claim 6, characterized in that: after S01, before S02, there is also a temperature detection step; in the step, the temperature reading module reads the real-time temperature of the storage battery sent by the communication terminal, and adjusts the output current according to the temperature.
10. The charging control method of a charger according to claim 9, characterized in that: when the temperature is lower than the lowest working threshold, the output current of the current output module is zero, when the temperature is between the lowest working threshold and the low-temperature set value, the output current of the current output adjusting module is low, and when the temperature is higher than the low-temperature set value, the output current of the current output adjusting module is high.
11. The charging control method of a charger according to claim 6, characterized in that: in the steps S02 and S03, the current output detection module detects the output current in real time, and when the output current is lower than the safety threshold, the main body immediately cuts off the charging output function of the main body.
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| CN2020101554626 | 2020-03-09 | ||
| CN202010155462 | 2020-03-09 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624054A (en)* | 2012-03-26 | 2012-08-01 | 北京物资学院 | A charging device and method with adjustable output current in constant current charging stage |
| CN103259059A (en)* | 2013-04-17 | 2013-08-21 | 大连尚能科技发展有限公司 | Initial charging method of flow battery and circuit |
| CN104218638A (en)* | 2014-08-20 | 2014-12-17 | 惠州市亿能电子有限公司 | Charging current safety control method |
| CN106655432A (en)* | 2016-12-30 | 2017-05-10 | 广东欧珀移动通信有限公司 | Charging control method, device, adapter and system |
| CN107437642A (en)* | 2017-08-07 | 2017-12-05 | 北京臻迪科技股份有限公司 | A kind of intelligent charging method and device |
| US20190036354A1 (en)* | 2016-04-08 | 2019-01-31 | Huawei Technologies Co., Ltd. | Fast Charging Method and System, Terminal, and Charger |
- 2020
- 2020-04-07CNCN202010264639.6Apatent/CN111416408A/enactivePending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624054A (en)* | 2012-03-26 | 2012-08-01 | 北京物资学院 | A charging device and method with adjustable output current in constant current charging stage |
| CN103259059A (en)* | 2013-04-17 | 2013-08-21 | 大连尚能科技发展有限公司 | Initial charging method of flow battery and circuit |
| CN104218638A (en)* | 2014-08-20 | 2014-12-17 | 惠州市亿能电子有限公司 | Charging current safety control method |
| US20190036354A1 (en)* | 2016-04-08 | 2019-01-31 | Huawei Technologies Co., Ltd. | Fast Charging Method and System, Terminal, and Charger |
| CN106655432A (en)* | 2016-12-30 | 2017-05-10 | 广东欧珀移动通信有限公司 | Charging control method, device, adapter and system |
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