CN116031510B - Battery equalization method and device and related equipment - Google Patents
Battery equalization method and device and related equipment Download PDFInfo
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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
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Abstract
The application provides a battery equalization method, a device and related equipment, which are used for acquiring the working state information of each battery core in a battery; for each electric core, calculating a voltage difference value corresponding to the electric core according to the current voltage value of the electric core and the average voltage value of each electric core in the battery; calculating a temperature difference value corresponding to each battery cell to be evaluated according to the current temperature value of each battery cell to be evaluated and the average temperature value of each battery cell in the battery; calculating the score of each to-be-evaluated cell by a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell; and determining the sequence of voltage equalization of all the to-be-evaluated electric cores according to the score of each to-be-evaluated electric core. Therefore, the sequence of voltage equalization of the battery cells in the battery is comprehensively determined through the voltage difference value and the temperature difference value, overheat of the single battery cells can be avoided, and accordingly the equalization reliability of the battery is improved.
Description
Technical Field
The present application relates to the field of battery technologies, and in particular, to a battery equalization method, apparatus, and related devices.
Background
The problem of non-uniformity in the voltage of each cell in a battery is increasingly accentuated as the battery is continuously cycled through charge and discharge, subject to battery manufacturing techniques. Therefore, voltage equalization processing needs to be performed on the battery cells in the battery, in the prior art, the battery cells with larger difference between the current voltage value and the average voltage value are usually subjected to the voltage equalization processing preferentially, but the sequence of the battery cells needing to be subjected to the voltage equalization processing in the battery is determined only by the factor in the actual processing process, which may cause overheating of the battery or overheating of a battery equalization device, so that safety problems are caused.
Therefore, the prior art has a problem that the reliability of battery equalization is low.
Disclosure of Invention
The embodiment of the application aims to provide a battery equalization method, a device and related equipment, which are used for solving the problem of low reliability of battery equalization.
In a first aspect, an embodiment of the present application provides a battery equalization method, including:
Acquiring working state information of each electric core in the battery, wherein the working state information comprises a current voltage value and a current temperature value of each electric core in the battery;
For each electric core, calculating a voltage difference value corresponding to the electric core according to the current voltage value of the electric core and the average voltage value of each electric core in the battery, wherein the average voltage value of the electric core is the average value of the current voltage value of each electric core in the battery, and the voltage difference value is the difference value between the current voltage value of each electric core and the average voltage value of each electric core in the battery;
Calculating a temperature difference value corresponding to each battery cell to be evaluated according to the current temperature value of each battery cell to be evaluated and the average temperature value of each battery cell in the battery, wherein the battery cell to be evaluated is a battery cell with the absolute value of the voltage difference value being larger than a preset value;
calculating the score of each to-be-evaluated cell by a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell;
and determining the sequence of voltage equalization of all the to-be-evaluated electric cores according to the score of each to-be-evaluated electric core.
Optionally, after determining the order of voltage equalization of all the cells to be evaluated according to the score of each cell to be evaluated, the method further includes:
Under the condition that the voltage difference value corresponding to the to-be-evaluated electric core is a positive number, determining that the to-be-evaluated electric core needs to be subjected to power consumption balancing, wherein the power consumption balancing is to reduce the voltage of the to-be-evaluated electric core;
And under the condition that the voltage difference value corresponding to the to-be-evaluated electric core is negative, determining that the to-be-evaluated electric core needs to be subjected to power compensation equalization, wherein the power compensation equalization is to raise the voltage of the to-be-evaluated electric core.
Optionally, under the condition that the to-be-evaluated electrical cores need to be subjected to power supply equalization, calculating the score of each to-be-evaluated electrical core by a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated electrical core includes:
Acquiring a current temperature value of the battery charging chip;
determining an availability score of the charging chip according to a current temperature value of the charging chip in the battery and a preset temperature value of the charging chip, wherein the preset temperature value of the charging chip is an bearable temperature value of the charging chip in a working state, the availability score of the charging chip is a probability that the charging chip can continue to work, and the charging chip is used for controlling the battery to be evaluated to perform power supply equalization;
And calculating the score of each to-be-evaluated cell according to the availability score of the charging chip and the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell by using the good and bad solution distance method, wherein the score of each to-be-evaluated cell is used for representing the sequence of voltage equalization of each to-be-evaluated cell.
Optionally, under the situation that the to-be-evaluated electrical cores need to perform power consumption balance, calculating the score of each to-be-evaluated electrical core according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated electrical core by using a good-bad solution distance method includes:
acquiring the current temperature of the equalization resistor of the battery;
Determining an availability score of the balancing resistor according to the current temperature of the balancing resistor of the battery and a preset temperature value of the balancing resistor, wherein the preset temperature value of the balancing resistor is an bearable temperature value of the balancing resistor in a working state, the availability score of the balancing resistor is the probability that the balancing resistor can continue to work, and the balancing resistor is used for controlling the battery core to be evaluated to perform power consumption balancing;
And calculating the score of each to-be-evaluated cell according to the availability score of the balancing resistor and the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell by using the good and bad solution distance method, wherein the score of each to-be-evaluated cell is used for representing the sequence of voltage balancing of each to-be-evaluated cell.
Optionally, the battery is provided with a plurality of electric cores connected in series in sequence, the positive electrode and the negative electrode of each electric core are respectively connected with different switch circuits, the switch circuits are used for controlling the corresponding electric cores to perform voltage equalization, the positive electrode of one electric core and the negative electrode of the other electric core in the two adjacent electric cores are connected with the same switch circuit, and the calculating of the score of each electric core to be evaluated through a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each electric core to be evaluated comprises:
Acquiring a circuit connection relation of each to-be-evaluated cell, wherein the circuit connection relation is used for representing the switching circuit of the positive electrode and the negative electrode of the to-be-evaluated cell;
Determining a switch safety score of each to-be-evaluated cell according to the circuit connection relation, wherein the switch safety score is used for indicating the number of switch circuits which need to switch states for performing voltage equalization twice;
And calculating the score of each to-be-evaluated cell according to the switch safety score of the to-be-evaluated cell and the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell by using the good and bad solution distance method, wherein the score of each to-be-evaluated cell is used for representing the sequence of voltage equalization of each to-be-evaluated cell.
In a second aspect, an embodiment of the present application further provides a battery equalization apparatus, including:
The first acquisition module is used for acquiring the working state information of each electric core in the battery, wherein the working state information comprises the current voltage value and the current temperature value of each electric core in the battery;
the first calculation module is used for calculating a voltage difference value corresponding to each electric core according to the current voltage value of the electric core and the average voltage value of each electric core in the battery, wherein the average voltage value of the electric core is the average value of the current voltage value of each electric core in the battery, and the voltage difference value is the difference value between the current voltage value of each electric core and the average voltage value of each electric core in the battery;
The second calculation module is used for calculating a temperature difference value corresponding to each battery cell to be evaluated according to the current temperature value of each battery cell to be evaluated and the average temperature value of each battery cell in the battery, wherein the battery cell to be evaluated is a battery cell with the absolute value of the voltage difference value being larger than a preset value;
the third calculation module is used for calculating the score of each to-be-evaluated cell through a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell;
And the first determining module is used for determining the sequence of voltage equalization of each to-be-evaluated cell according to the score of each to-be-evaluated cell.
Optionally, the battery equalization device further comprises:
The second determining module is used for determining that the to-be-evaluated electric core needs to be subjected to power consumption balancing under the condition that the voltage difference value corresponding to the to-be-evaluated electric core is positive, wherein the power consumption balancing is to reduce the voltage of the to-be-evaluated electric core;
And the third determining module is used for determining that the to-be-evaluated electric core needs to be subjected to power-up equalization under the condition that the voltage difference corresponding to the to-be-evaluated electric core is negative, and the power-up equalization is to raise the voltage of the to-be-evaluated electric core.
Optionally, in the case that the to-be-evaluated electrical core needs to perform power up equalization, the third calculation module includes:
the first acquisition sub-module is used for acquiring the current temperature value of the battery charging chip;
The first determining submodule is used for determining an availability score of the charging chip according to a current temperature value of the charging chip in the battery and a preset temperature value of the charging chip, wherein the preset temperature value of the charging chip is an bearable temperature value of the charging chip in a working state, the availability score of the charging chip is a probability that the charging chip can continue to work, and the charging chip is used for controlling the battery cell to be evaluated to perform power supply equalization;
The first calculating sub-module is used for calculating the score of each to-be-evaluated cell through the good-bad solution distance method according to the availability score of the charging chip and the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell, and the score of each to-be-evaluated cell is used for representing the voltage balancing sequence of each to-be-evaluated cell.
In a third aspect, an embodiment of the present application provides an electronic device, including: the battery balancing device comprises a memory, a processor and a program stored on the memory and capable of running on the processor, wherein the processor is used for executing the program in the memory to realize the steps of the battery balancing method.
In a fourth aspect, an embodiment of the present application provides a readable storage medium storing a program, which when executed by a processor, implements the steps of the battery equalization method of any of the above.
In the embodiment of the application, the working state information of each electric core in the battery is obtained, wherein the working state information comprises the current voltage value and the current temperature value of each electric core in the battery; for each electric core, calculating a voltage difference value corresponding to the electric core according to the current voltage value of the electric core and the average voltage value of each electric core in the battery, wherein the average voltage value of the electric core is the average value of the current voltage value of each electric core in the battery, and the voltage difference value is the difference value between the current voltage value of each electric core and the average voltage value of each electric core in the battery; calculating a temperature difference value corresponding to each battery cell to be evaluated according to the current temperature value of each battery cell to be evaluated and the average temperature value of each battery cell in the battery, wherein the battery cell to be evaluated is a battery cell with the absolute value of the voltage difference value being larger than a preset value; calculating the score of each to-be-evaluated cell by a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell; and determining the sequence of voltage equalization of all the to-be-evaluated electric cores according to the score of each to-be-evaluated electric core. Therefore, the sequence of voltage equalization of the battery cells in the battery is comprehensively determined through the voltage difference value and the temperature difference value, overheat of the single battery cells can be avoided, and accordingly the equalization reliability of the battery is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a battery equalization method according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a battery equalization device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. "upper", "lower", "left", "right", etc. are used merely to indicate a relative positional relationship, which changes accordingly when the absolute position of the object to be described changes.
As shown in fig. 1, an embodiment of the present application provides a battery equalization method, which includes:
step 101, acquiring working state information of each electric core in the battery, wherein the working state information comprises a current voltage value and a current temperature value of each electric core in the battery;
in the embodiment of the application, the number of the electric cores in the battery can be any value; for example, 10 cells may be included in one battery, or 15 cells may be included in one battery.
It should be understood that the current voltage value of each electric core is obtained by measuring the voltage value of each electric core at the current moment; the current temperature value of each cell is obtained by measuring the temperature of each cell at the current moment. Further, both the current voltage value and the current temperature value may change over time.
102, Calculating a voltage difference value corresponding to each electric core according to the current voltage value of the electric core and the average voltage value of each electric core in the battery, wherein the average voltage value of the electric core is the average value of the current voltage value of each electric core in the battery, and the voltage difference value is the difference value between the current voltage value of each electric core and the average voltage value of each electric core in the battery;
in the embodiment of the application, the average voltage value of each electric core in the battery is calculated according to the current voltage value of each electric core in the battery;
for example, the battery includes three electric cells, and the current voltage values of the three electric cells are 3 volts, 4 volts and 5 volts respectively, and then the average voltage value of the electric cells is 4 volts.
Further, the current corresponding voltage differences of the three electric cores in the battery are-1 volt, 0 volt and 1 volt respectively.
Step 103, calculating a temperature difference value corresponding to each battery cell to be evaluated according to the current temperature value of each battery cell to be evaluated and the average temperature value of each battery cell in the battery, wherein the battery cell to be evaluated is a battery cell with the absolute value of the voltage difference value being larger than a preset value;
In the embodiment of the application, the average temperature difference value of each electric core in the battery is calculated according to the current temperature value of each electric core in the battery;
Illustratively, the battery includes three cells, and the current temperature values of the three cells are 30 ℃, 40 ℃ and 50 ℃, respectively, and the average temperature value of the cells is 40 ℃.
Further, the current corresponding temperature differences of the three electric cores in the battery are-10 ℃, 0 ℃ and 10 ℃ respectively.
Step 104, calculating the score of each to-be-evaluated cell by a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell;
In the embodiment of the application, the score of each electric core to be evaluated is calculated by a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each electric core to be evaluated, the voltage difference value and the temperature difference value of each electric core are normally normalized, so that a forward matrix x is obtained, the forward matrix is normalized to obtain a standardized matrix z, and the score of each electric core is calculated according to the standardized matrix z.
And 105, determining the sequence of voltage equalization of all the to-be-evaluated electric cores according to the score of each to-be-evaluated electric core.
In the embodiment of the application, the higher the score of the battery cell, the first voltage equalization of the battery cell is determined.
In the embodiment of the application, the working state information of each electric core in the battery is obtained, wherein the working state information comprises the current voltage value and the current temperature value of each electric core in the battery; for each electric core, calculating a voltage difference value corresponding to the electric core according to the current voltage value of the electric core and the average voltage value of each electric core in the battery, wherein the average voltage value of the electric core is the average value of the current voltage value of each electric core in the battery, and the voltage difference value is the difference value between the current voltage value of each electric core and the average voltage value of each electric core in the battery; calculating a temperature difference value corresponding to each battery cell to be evaluated according to the current temperature value of each battery cell to be evaluated and the average temperature value of each battery cell in the battery, wherein the battery cell to be evaluated is a battery cell with the absolute value of the voltage difference value being larger than a preset value; calculating the score of each to-be-evaluated cell by a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell; and determining the sequence of voltage equalization of all the to-be-evaluated electric cores according to the score of each to-be-evaluated electric core. Therefore, the sequence of voltage equalization of the battery cells in the battery is comprehensively determined through the voltage difference value and the temperature difference value, overheat of the single battery cells can be avoided, and accordingly the equalization reliability of the battery is improved.
As shown in fig. 2, an embodiment of the present application provides a battery equalization apparatus, including:
a first obtaining module 201, configured to obtain operation state information of each electric core in the battery, where the operation state information includes a current voltage value and a current temperature value of each electric core in the battery;
A first calculation module 202, configured to calculate, for each of the electrical cores, a voltage difference value corresponding to the electrical core according to a current voltage value of the electrical core and an average voltage value of each electrical core in the battery, where the average voltage value of the electrical core is an average value of the current voltage value of each electrical core in the battery, and the voltage difference value is a difference value between the current voltage value of each electrical core and the average voltage value of each electrical core in the battery;
The second calculating module 203 is configured to calculate a temperature difference value corresponding to each to-be-evaluated electrical core according to a current temperature value of each to-be-evaluated electrical core and an average temperature value of each electrical core in the battery, where the to-be-evaluated electrical core is an electrical core whose absolute value of the voltage difference value is greater than a preset value;
the third calculation module 204 is configured to calculate a score of each to-be-evaluated electrical core according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated electrical core by using a better-worse solution distance method;
the first determining module 205 is configured to determine a sequence of voltage equalization performed on each of the to-be-evaluated electrical cores according to the score of each of the to-be-evaluated electrical cores.
The battery equalization device 200 provided in the embodiment of the present application can implement each process in the above method embodiment, and in order to avoid repetition, the description is omitted here.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where, as shown in fig. 3, the electronic device includes: may include a processor 301, a memory 302, and a program 3021 stored on the memory 302 and executable on the processor 301.
The program 3021, when executed by the processor 301, may implement any steps and achieve the same advantageous effects in the method embodiment corresponding to fig. 1, which will not be described herein.
Those of ordinary skill in the art will appreciate that all or a portion of the steps of implementing the methods of the embodiments described above may be implemented by hardware associated with program instructions, where the program may be stored on a readable medium.
The embodiment of the present application further provides a readable storage medium, where a computer program is stored, where the computer program when executed by a processor may implement any step in the method embodiment corresponding to fig. 1, and may achieve the same technical effect, so that repetition is avoided, and no further description is given here.
The computer-readable storage media of embodiments of the present application may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium may be, for example, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or terminal. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
While the foregoing is directed to the preferred embodiments of the present application, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present application, and such modifications and adaptations are intended to be comprehended within the scope of the present application.
Claims (10)
1. A method of battery equalization, the method comprising:
Acquiring working state information of each electric core in the battery, wherein the working state information comprises a current voltage value and a current temperature value of each electric core in the battery;
For each electric core, calculating a voltage difference value corresponding to the electric core according to the current voltage value of the electric core and the average voltage value of each electric core in the battery, wherein the average voltage value of the electric core is the average value of the current voltage value of each electric core in the battery, and the voltage difference value is the difference value between the current voltage value of each electric core and the average voltage value of each electric core in the battery;
Calculating a temperature difference value corresponding to each battery cell to be evaluated according to the current temperature value of each battery cell to be evaluated and the average temperature value of each battery cell in the battery, wherein the battery cell to be evaluated is a battery cell with the absolute value of the voltage difference value being larger than a preset value;
calculating the score of each to-be-evaluated cell by a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell;
Determining the sequence of voltage equalization of all the to-be-evaluated electric cores according to the score of each to-be-evaluated electric core;
The calculating the score of each to-be-evaluated cell by a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell comprises: and forward normalizing the voltage difference value and the temperature difference value of each cell to obtain a forward normalization matrix x, normalizing the forward normalization matrix to obtain a normalization matrix z, and calculating the score of each cell according to the normalization matrix z.
2. The method for balancing battery according to claim 1, wherein after determining the sequence of voltage balancing of all the cells to be evaluated according to the score of each cell to be evaluated, the method further comprises:
Under the condition that the voltage difference value corresponding to the to-be-evaluated electric core is a positive number, determining that the to-be-evaluated electric core needs to be subjected to power consumption balancing, wherein the power consumption balancing is to reduce the voltage of the to-be-evaluated electric core;
And under the condition that the voltage difference value corresponding to the to-be-evaluated electric core is negative, determining that the to-be-evaluated electric core needs to be subjected to power compensation equalization, wherein the power compensation equalization is to raise the voltage of the to-be-evaluated electric core.
3. The battery balancing method according to claim 1, wherein, in the case where the to-be-evaluated electrical cores need to perform the power-up balancing, calculating the score of each to-be-evaluated electrical core according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated electrical core by a good-bad solution distance method includes:
Acquiring a current temperature value of the battery charging chip;
determining an availability score of the charging chip according to a current temperature value of the charging chip in the battery and a preset temperature value of the charging chip, wherein the preset temperature value of the charging chip is an bearable temperature value of the charging chip in a working state, the availability score of the charging chip is a probability that the charging chip can continue to work, and the charging chip is used for controlling the battery to be evaluated to perform power supply equalization;
And calculating the score of each to-be-evaluated cell according to the availability score of the charging chip and the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell by using the good and bad solution distance method, wherein the score of each to-be-evaluated cell is used for representing the sequence of voltage equalization of each to-be-evaluated cell.
4. The battery balancing method according to claim 1, wherein, when the to-be-evaluated electrical core needs to perform power consumption balancing, calculating the score of each to-be-evaluated electrical core according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated electrical core by using a good-bad solution distance method includes:
acquiring the current temperature of the equalization resistor of the battery;
Determining an availability score of the balancing resistor according to the current temperature of the balancing resistor of the battery and a preset temperature value of the balancing resistor, wherein the preset temperature value of the balancing resistor is an bearable temperature value of the balancing resistor in a working state, the availability score of the balancing resistor is the probability that the balancing resistor can continue to work, and the balancing resistor is used for controlling the battery core to be evaluated to perform power consumption balancing;
And calculating the score of each to-be-evaluated cell according to the availability score of the balancing resistor and the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell by using the good and bad solution distance method, wherein the score of each to-be-evaluated cell is used for representing the sequence of voltage balancing of each to-be-evaluated cell.
5. The battery balancing method according to claim 1, wherein the battery has a plurality of cells connected in series in sequence, the positive electrode and the negative electrode of each cell are respectively connected with different switch circuits, the switch circuits are used for controlling the corresponding cells to perform voltage balancing, the positive electrode of one cell and the negative electrode of the other cell of the two adjacent cells are connected with the same switch circuit, and the calculating the score of each cell to be evaluated by a better-worse solution distance method according to the voltage difference and the temperature difference corresponding to each cell to be evaluated comprises:
Acquiring a circuit connection relation of each to-be-evaluated cell, wherein the circuit connection relation is used for representing the switching circuit of the positive electrode and the negative electrode of the to-be-evaluated cell;
Determining a switch safety score of each to-be-evaluated cell according to the circuit connection relation, wherein the switch safety score is used for indicating the number of switch circuits which need to switch states for performing voltage equalization twice;
And calculating the score of each to-be-evaluated cell according to the switch safety score of the to-be-evaluated cell and the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell by using the good and bad solution distance method, wherein the score of each to-be-evaluated cell is used for representing the sequence of voltage equalization of each to-be-evaluated cell.
6. A battery equalization apparatus, characterized in that the battery equalization apparatus comprises:
The first acquisition module is used for acquiring the working state information of each electric core in the battery, wherein the working state information comprises the current voltage value and the current temperature value of each electric core in the battery;
the first calculation module is used for calculating a voltage difference value corresponding to each electric core according to the current voltage value of the electric core and the average voltage value of each electric core in the battery, wherein the average voltage value of the electric core is the average value of the current voltage value of each electric core in the battery, and the voltage difference value is the difference value between the current voltage value of each electric core and the average voltage value of each electric core in the battery;
The second calculation module is used for calculating a temperature difference value corresponding to each battery cell to be evaluated according to the current temperature value of each battery cell to be evaluated and the average temperature value of each battery cell in the battery, wherein the battery cell to be evaluated is a battery cell with the absolute value of the voltage difference value being larger than a preset value;
the third calculation module is used for calculating the score of each to-be-evaluated cell through a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell;
the first determining module is used for determining the sequence of voltage equalization of each to-be-evaluated cell according to the score of each to-be-evaluated cell;
The calculating the score of each to-be-evaluated cell by a good-bad solution distance method according to the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell comprises: and forward normalizing the voltage difference value and the temperature difference value of each cell to obtain a forward normalization matrix x, normalizing the forward normalization matrix to obtain a normalization matrix z, and calculating the score of each cell according to the normalization matrix z.
7. The battery equalization apparatus of claim 6, wherein the battery equalization apparatus further comprises:
The second determining module is used for determining that the to-be-evaluated electric core needs to be subjected to power consumption balancing under the condition that the voltage difference value corresponding to the to-be-evaluated electric core is positive, wherein the power consumption balancing is to reduce the voltage of the to-be-evaluated electric core;
And the third determining module is used for determining that the to-be-evaluated electric core needs to be subjected to power-up equalization under the condition that the voltage difference corresponding to the to-be-evaluated electric core is negative, and the power-up equalization is to raise the voltage of the to-be-evaluated electric core.
8. The battery equalization device according to claim 6, wherein, in a case where the to-be-evaluated electrical core needs to perform power up equalization, the third calculation module includes:
the first acquisition sub-module is used for acquiring the current temperature value of the battery charging chip;
The first determining submodule is used for determining an availability score of the charging chip according to a current temperature value of the charging chip in the battery and a preset temperature value of the charging chip, wherein the preset temperature value of the charging chip is an bearable temperature value of the charging chip in a working state, the availability score of the charging chip is a probability that the charging chip can continue to work, and the charging chip is used for controlling the battery cell to be evaluated to perform power supply equalization;
The first calculating sub-module is used for calculating the score of each to-be-evaluated cell through the good-bad solution distance method according to the availability score of the charging chip and the voltage difference value and the temperature difference value corresponding to each to-be-evaluated cell, and the score of each to-be-evaluated cell is used for representing the voltage balancing sequence of each to-be-evaluated cell.
9. An electronic device, comprising: memory, a processor and a program stored on the memory and executable on the processor, characterized in that the processor is adapted to execute the steps of the program in the memory for implementing the battery balancing method according to any one of claims 1 to 5.
10. A readable storage medium storing a program, wherein the program when executed by a processor implements the steps of the battery equalization method according to any one of claims 1 to 5.
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