CN111953034A - Battery equalization method and battery equalization equipment - Google Patents
Battery equalization method and battery equalization equipment Download PDFInfo
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- CN111953034A CN111953034A CN202010689404.1A CN202010689404A CN111953034A CN 111953034 A CN111953034 A CN 111953034A CN 202010689404 A CN202010689404 A CN 202010689404A CN 111953034 A CN111953034 A CN 111953034A
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- battery
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- voltage
- internal resistance
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/22—Balancing the charge of battery modules
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- 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
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- 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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a battery equalization method and a battery equalization device, wherein the battery equalization method comprises the following steps: collecting battery information of each battery in a battery pack electrically connected with the battery balancing equipment, wherein the battery information at least comprises voltage, and the battery pack comprises a plurality of batteries which are connected in series and/or in parallel; analyzing the battery information of each battery through a battery health degree model to obtain the current capacity and the internal resistance of each battery; and determining a target balancing strategy according to the current capacity, the internal resistance and the voltage of each battery, and balancing the battery pack according to the target balancing strategy. Therefore, the battery pack is balanced by combining the historical data, the current capacity, the voltage and the internal resistance value of each battery, the inconsistency among the single batteries can be better improved, the charge-discharge capacity of the whole battery pack is improved, and the balancing efficiency and the balancing effect are effectively improved.
Description
Technical Field
The invention relates to the field of batteries, in particular to a battery equalization method and battery equalization equipment.
Background
The battery is used as a source of the power of the electric automobile and can provide the required power for the electric automobile. Due to the limitations of battery energy and terminal voltage, multiple batteries are often used in series or parallel combinations to achieve higher voltages and higher energies. Due to the high non-linearity of the battery characteristics, there may be differences between batteries during long-term charge and discharge, and the increased inconsistency between individual batteries may result in rapid degradation of the capacity of the entire battery pack, and even in individual batteries that are damaged by overcharge or overdischarge, and therefore, it is necessary to balance the batteries in order to condition the state of the entire battery pack.
The BMS (BATTERY MANAGEMENT SYSTEM ) of the electric vehicle can balance the BATTERY, but currently the BMS can only balance the BATTERY passively. The conventional battery active balancing equipment only balances single batteries respectively, neglects the overall balancing effect of a battery pack, and is easy to cause the imbalance condition again after balancing.
Therefore, in the prior art, the effect of balancing the battery pack is not good.
Disclosure of Invention
In view of the above, the present invention provides a battery equalization method and a battery equalization apparatus to solve the above technical problems.
Firstly, in order to achieve the above object, the present invention provides a battery equalization method applied to a battery equalization apparatus, the method including:
collecting battery information of each battery in a battery pack electrically connected with the battery balancing equipment, wherein the battery information at least comprises voltage, and the battery pack comprises a plurality of batteries which are connected in series and/or in parallel;
analyzing the battery information of each battery through a battery health degree model to obtain the current capacity and the internal resistance of each battery;
and determining a target balancing strategy according to the historical data, the current capacity, the internal resistance and the voltage of each battery, and balancing the battery pack according to the target balancing strategy.
Optionally, the battery information further includes a current charge/discharge temperature, a current internal resistance, and historical charge/discharge data of each battery, the historical charge/discharge data including a historical charge/discharge current, a historical charge/discharge voltage, and a historical charge/discharge temperature.
Optionally, the determining a target balancing strategy according to the historical data, the current capacity, the internal resistance, and the voltage of each battery includes:
and if the current capacity of the first battery is smaller than the preset capacity and/or the internal resistance of the first battery is larger than the preset resistance value, replacing the first battery by the target balancing strategy, and balancing a second battery according to the voltage of each battery, wherein the second battery is a battery except the first battery in the battery pack.
Optionally, the method further comprises:
and determining a target balancing strategy according to the battery type of the battery pack, wherein different battery types correspond to different balancing strategies, and the different balancing strategies comprise different current output modes.
Optionally, the different current output modes include different current output values and different current output interval durations.
Further, in order to achieve the above object, the present invention further provides a battery balancing apparatus, where the battery balancing apparatus includes a controller, an acquisition module, and a balancing module, and the controller is configured to implement the following steps:
the method comprises the steps that battery information of each battery in a battery pack electrically connected with the battery balancing equipment is collected through a collection module, wherein the battery information at least comprises voltage, and the battery pack comprises a plurality of batteries which are connected in series and/or in parallel;
analyzing the battery information of each battery through a battery health degree model to obtain the current capacity and the internal resistance of each battery;
and determining a target balancing strategy according to the historical data, the current capacity, the internal resistance and the voltage of each battery, and controlling the balancing module to balance the battery pack according to the target balancing strategy.
Optionally, the battery information further includes a current charge/discharge temperature, a current internal resistance, and historical charge/discharge data of each battery, the historical charge/discharge data including a historical charge/discharge current, a historical charge/discharge voltage, and a historical charge/discharge temperature.
Optionally, the determining a target balancing strategy according to the historical data, the current capacity, the internal resistance, and the voltage of each battery includes:
and if the current capacity of the first battery is smaller than the preset capacity and/or the internal resistance of the first battery is larger than the preset resistance value, replacing the first battery by the target balancing strategy, and balancing a second battery according to the voltage of each battery, wherein the second battery is a battery except the first battery in the battery pack.
Optionally, the controller is further configured to:
and determining a target balancing strategy according to the battery type of the battery pack, wherein different battery types correspond to different balancing strategies, and the different balancing strategies comprise different current output modes.
Optionally, the collection module includes a power module, each battery of the battery pack is connected to the power module, and the voltage of each battery is collected by the power module.
Compared with the prior art, the battery balancing method provided by the invention collects the battery information of each battery in the battery pack electrically connected with the battery balancing equipment, wherein the battery information at least comprises voltage, and the battery pack comprises a plurality of batteries which are mutually connected in series and/or in parallel; analyzing the battery information of each battery through a battery health degree model to obtain the current capacity and the internal resistance of each battery; and determining a target balancing strategy according to the historical data, the current capacity, the internal resistance and the voltage of each battery, and balancing the battery pack according to the target balancing strategy. Therefore, the battery pack is balanced by combining the current capacity and the content of the battery, the inconsistency among the single batteries can be better improved, the charge and discharge capacity of the battery pack is improved, and the balancing efficiency and the balancing effect are effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of a battery equalization apparatus according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a battery equalization method according to an embodiment of the present invention;
fig. 3 is a second schematic structural diagram of a battery equalization apparatus according to an embodiment of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The Mobile terminal mentioned in the embodiments of the present invention may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or the like.
Fig. 1 is a schematic structural diagram of a battery equalization apparatus according to an embodiment of the present invention, and as shown in fig. 1, a battery equalization apparatus 100 includes a controller 101, an equalization module 102, and an acquisition module 103, where the controller 101, the equalization module 102, and the acquisition module 103 are electrically connected to each other, and the electrical connection according to the embodiment of the present invention includes an electrical signal connection and a communication signal connection, and is used for implementing a circuit connection and data transmission. The acquisition module 103 is configured to acquire battery information, and the balancing module 102 is configured to balance the battery under the control of the controller 101.
Based on the hardware structure of the battery balancing apparatus 100, various embodiments of the method of the present invention are proposed.
Referring to fig. 2, fig. 2 is a schematic flow chart of a battery equalization method according to an embodiment of the present invention, where the method is applied to a battery equalization apparatus, and as shown in fig. 2, the method includes:
In this step, the battery balancing method collects battery information of each battery in a battery pack through a collection module of the battery balancing device, where the battery information at least includes voltage, and the battery pack includes a plurality of batteries connected in series and/or in parallel. In some embodiments of the present invention, the battery information further includes historical data of the battery, such as historical charge/discharge data.
The battery information may further include a current charge/discharge temperature of each battery and historical charge/discharge data including a historical charge/discharge current, a historical charge/discharge voltage, and a historical charge/discharge temperature. It is to be understood that the collection module may include a temperature sensor, and the battery balancing apparatus may acquire the historical charge/discharge data of the battery from the BMS system of the battery pack by establishing a communication connection with the BMS system of the battery pack in case the battery information includes the historical charge/discharge data. In some embodiments of the present invention, historical charging/discharging data of the battery may be stored in the cloud, and the battery balancing device may also obtain the historical charging/discharging data of each battery from the cloud, where the manner of obtaining the historical charging/discharging data of the battery is merely an example, and the embodiment of the present invention is not limited thereto.
In this step, the battery balancing device inputs the acquired battery information of each battery as input data into the battery health degree model, and analyzes the battery information of each battery through the battery health degree model to obtain the current capacity and the internal resistance of each battery. It is understood that as the number of charging/discharging times of the battery increases, the actual capacity of the battery gradually decreases and the internal resistance gradually increases, and in this step, the current capacity and the internal resistance of each battery are obtained by analyzing the current charging/discharging information and the historical charging/discharging information of each battery.
In this step, the battery balancing device determines a target balancing strategy according to the historical data, the current capacity, the internal resistance and the voltage of each battery, and controls the balancing module to balance the battery pack according to the target balancing strategy.
The battery balancing device may determine whether to replace the battery according to the current capacity and the internal resistance of the battery, and specifically, if the current capacity of the first battery is smaller than a preset capacity and/or the internal resistance of the first battery is larger than a preset resistance value, the battery balancing device determines that the target balancing strategy is to replace the first battery, and balances a second battery according to the voltage of each battery, where the second battery is a battery in the battery pack except the first battery.
It can be understood that if the actual capacity and/or internal resistance of a certain battery in the battery pack is low, the average capacity and/or internal resistance of the battery pack is high, and thus the overall performance of the battery pack is reduced, and even if the battery pack is equalized, the equalization effect is not good. In this embodiment, the first battery with lower actual capacity and/or higher internal resistance is replaced, and the second battery is balanced according to the voltage of each battery, so that the overall performance of the battery pack can be effectively improved, and the balancing effect is improved. It should be noted that, the equalizing the second battery according to the voltage of each battery is the same as the equalizing the batteries according to the voltage of the battery pack in the prior art, and the present invention will not be described in detail herein.
In the embodiment of the invention, the identification information can be set for each battery in the battery pack, and the battery balancing device sends the prompt message carrying the identification information of the first battery to the manager when determining that the first battery needs to be replaced, so that the manager can replace the first battery quickly. In some embodiments of the present invention, a warning device (e.g., a warning lamp) may be disposed for each battery, and when it is determined that the first battery needs to be replaced, the warning device corresponding to the first battery is controlled to send a warning message, so that a manager can determine the first battery needing to be replaced according to the warning device sending the warning message, and then replace the first battery.
The battery balancing equipment can also determine a target balancing strategy according to the battery type of the battery pack, wherein different battery types correspond to different balancing strategies, and the different balancing strategies comprise different current output modes. The battery type may be specifically a cell type, such as a lithium iron phosphate cell, a ternary lithium cell, a lithium manganate cell, and the like.
In the embodiment of the invention, the battery balancing method acquires the battery information of each battery in a battery pack electrically connected with the battery balancing equipment, wherein the battery information at least comprises voltage, and the battery pack comprises a plurality of batteries which are mutually connected in series and/or in parallel; analyzing the battery information of each battery through a battery health degree model to obtain the current capacity and the internal resistance of each battery; and determining a target balancing strategy according to the historical data, the current capacity, the internal resistance and the voltage of each battery, and balancing the battery pack according to the target balancing strategy. Therefore, the battery pack is balanced by combining the historical data, the current capacity and the content of each battery, the systematic balancing of the battery pack is realized, the inconsistency among the single batteries can be better improved, the charge-discharge capacity of the whole battery pack is improved, the balancing efficiency and the balancing effect are effectively improved, and the accuracy of the SOC (state of charge) in the running process of the batteries is improved.
Optionally, the battery information further includes a current charge/discharge temperature and historical charge/discharge data of each battery, the historical charge/discharge data including a historical charge/discharge current, a historical charge/discharge voltage, and a historical charge/discharge temperature.
Optionally, the determining a target balancing strategy according to the historical data, the current capacity, the internal resistance, and the voltage of each battery includes:
and if the current capacity of the first battery is smaller than the preset capacity and/or the internal resistance of the first battery is larger than the preset resistance value, replacing the first battery by the target balancing strategy, and balancing a second battery according to the voltage of each battery, wherein the second battery is a battery except the first battery in the battery pack.
Optionally, the method further comprises:
and determining a target balancing strategy according to the battery type of the battery pack, wherein different battery types correspond to different balancing strategies, and the different balancing strategies comprise different current output modes.
Optionally, the different current output modes include different current output values and different current output interval durations.
The different current output modes include different current output values and different current output interval durations, for example, a front-stage large current, a rear-stage trickle and a rear-stage pulse output mode can be adopted.
Referring to fig. 1 and fig. 3, in an embodiment of the present invention, a battery equalization apparatus is provided, where the controller 101 is configured to implement the following steps:
acquiring battery information of each battery in a battery pack electrically connected to the battery balancing apparatus 100 through an acquisition module 103, wherein the battery information at least includes voltage, and the battery pack includes a plurality of batteries connected in series and/or in parallel;
analyzing the battery information of each battery through a battery health degree model to obtain the current capacity and the internal resistance of each battery;
and determining a target balancing strategy according to the historical data, the current capacity, the internal resistance and the voltage of each battery, and controlling the balancing module to balance the battery pack according to the target balancing strategy.
In this embodiment, the battery balancing device collects, through a collection module, battery information of each battery in a battery pack electrically connected to the battery balancing device, where the battery information at least includes a voltage, and the battery pack includes a plurality of batteries connected in series and/or in parallel; analyzing the battery information of each battery through a battery health degree model to obtain the current capacity and the internal resistance of each battery; and determining a target balancing strategy according to the historical data, the current capacity, the internal resistance and the voltage of each battery, and controlling the balancing module to balance the battery pack according to the target balancing strategy. Therefore, the battery pack is balanced by combining the historical data, the current capacity and the content of each battery, the inconsistency among the single batteries can be better improved, the charge-discharge capacity of the whole battery pack is improved, and the balancing efficiency and the balancing effect are effectively improved.
Optionally, the battery information further includes a current charge/discharge temperature and historical charge/discharge data of each battery, the historical charge/discharge data including a historical charge/discharge current, a historical charge/discharge voltage, and a historical charge/discharge temperature.
Optionally, the determining a target balancing strategy according to the historical data, the current capacity, the internal resistance, and the voltage of each battery includes:
and if the current capacity of the first battery is smaller than the preset capacity and/or the internal resistance of the first battery is larger than the preset resistance value, replacing the first battery by the target balancing strategy, and balancing a second battery according to the voltage of each battery, wherein the second battery is a battery except the first battery in the battery pack.
Optionally, the controller is further configured to:
and determining a target balancing strategy according to the battery type of the battery pack, wherein different battery types correspond to different balancing strategies, and the different balancing strategies comprise different current output modes.
Optionally, referring to fig. 3, the collecting module 103 includes a power module 1031, each battery of the battery pack is connected to a power module 1031, and the voltage of each battery is collected by the power module 1031.
In this embodiment, when the battery pack is connected to the battery balancing apparatus 100, each battery of the battery pack is connected to a power module 1031, and the battery balancing apparatus 100 collects the voltage of each battery through the power module 1031. It is understood that the power module 1031 supplies power to the battery pack without collecting the voltage of the battery during the charging of the battery pack.
The voltage of the batteries is collected through the power supply module 1031 connected with each battery, so that on one hand, mutual data interference does not exist among the batteries, and accurate collection of the battery voltage can be realized; on the other hand, the voltage acquisition speed is high, the acquisition period is short, and the acquired voltage of each battery can be guaranteed to be the voltage at the same moment.
In the embodiment of the invention, the battery balancing device can be externally connected with a Power Conversion System (PCS), a load and the like to charge/discharge the battery.
In some embodiments of the present invention, the controller 101 may include a master controller and a slave controller, each master controller is electrically connected to a plurality of slave controllers, each slave controller is electrically connected to a plurality of power modules, each power module is connected to a battery, the slave controller performs data acquisition and management control and transmits information of the power modules to the master controller, and the master controller determines a battery balancing policy and transmits the determined battery balancing policy to the corresponding slave controller. For example, each slave controller may be electrically connected to 12 power modules.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A battery equalization method is applied to battery equalization equipment, and is characterized by comprising the following steps:
collecting battery information of each battery in a battery pack electrically connected with the battery balancing equipment, wherein the battery information at least comprises voltage, and the battery pack comprises a plurality of batteries which are connected in series and/or in parallel;
analyzing the battery information of each battery through a battery health degree model to obtain the current capacity and the internal resistance of each battery;
and determining a target balancing strategy according to the historical data, the current capacity, the internal resistance and the voltage of each battery, and balancing the battery pack according to the target balancing strategy.
2. The battery equalization method according to claim 1, wherein the battery information further includes a current charge/discharge temperature and historical charge/discharge data of each battery, the historical charge/discharge data including a historical charge/discharge current, a historical charge/discharge voltage, and a historical charge/discharge temperature.
3. The battery equalization method according to claim 1, wherein the determining a target equalization strategy according to the historical data, the current capacity, the internal resistance and the voltage of each battery comprises:
and if the current capacity of the first battery is smaller than the preset capacity and/or the internal resistance of the first battery is larger than the preset resistance value, replacing the first battery by the target balancing strategy, and balancing a second battery according to the voltage of each battery, wherein the second battery is a battery except the first battery in the battery pack.
4. The battery equalization method of claim 1, further comprising:
and determining a target balancing strategy according to the battery type of the battery pack, wherein different battery types correspond to different balancing strategies, and the different balancing strategies comprise different current output modes.
5. The battery equalization method of claim 4, wherein the different current output modes comprise different current output values and different current output interval durations.
6. The battery equalization device is characterized by comprising a controller, a collection module and an equalization module, wherein the controller is used for realizing the following steps:
the method comprises the steps that battery information of each battery in a battery pack electrically connected with the battery balancing equipment is collected through a collection module, wherein the battery information at least comprises voltage, and the battery pack comprises a plurality of batteries which are connected in series and/or in parallel;
analyzing the battery information of each battery through a battery health degree model to obtain the current capacity and the internal resistance of each battery;
and determining a target balancing strategy according to the historical data, the current capacity, the internal resistance and the voltage of each battery, and controlling the balancing module to balance the battery pack according to the target balancing strategy.
7. The battery equalization apparatus of claim 6, wherein the battery information further comprises a current charge/discharge temperature and historical charge/discharge data for each battery, the historical charge/discharge data comprising a historical charge/discharge current, a historical charge/discharge voltage, and a historical charge/discharge temperature.
8. The battery equalization apparatus according to claim 6, wherein the determining a target equalization strategy according to the history data, the current capacity, the internal resistance and the voltage of each battery comprises:
and if the current capacity of the first battery is smaller than the preset capacity and/or the internal resistance of the first battery is larger than the preset resistance value, replacing the first battery by the target balancing strategy, and balancing a second battery according to the voltage of each battery, wherein the second battery is a battery except the first battery in the battery pack.
9. The battery equalization apparatus of claim 6, wherein the controller is further configured to:
and determining a target balancing strategy according to the battery type of the battery pack, wherein different battery types correspond to different balancing strategies, and the different balancing strategies comprise different current output modes.
10. The battery equalization strategy of claim 6, wherein the collection module comprises a power module, and each battery of the battery pack is connected with a power module, and the voltage of each battery is collected by the power module.
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| CN113036242A (en) * | 2021-05-28 | 2021-06-25 | 蜂巢能源科技有限公司 | Battery module and battery pack |
| GB2623741A (en) * | 2022-10-14 | 2024-05-01 | Caterpillar Inc | Cell balancing strategy for a battery |
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