CN112782601A - Method, system and equipment for acquiring health degree of battery and readable storage medium - Google Patents

Method, system and equipment for acquiring health degree of battery and readable storage medium Download PDF

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Publication number
CN112782601A
CN112782601A CN201911068427.4A CN201911068427A CN112782601A CN 112782601 A CN112782601 A CN 112782601A CN 201911068427 A CN201911068427 A CN 201911068427A CN 112782601 A CN112782601 A CN 112782601A
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Prior art keywords
soc
charging
data
battery
current
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Chinese (zh)
Inventor
牛子铜
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Aulton New Energy Automotive Technology Co Ltd
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Aulton New Energy Automotive Technology Co Ltd
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Priority to CN201911068427.4A priority Critical patent/CN112782601A/en
Priority to PCT/CN2020/130900 priority patent/WO2021089057A1/en
Priority to PCT/CN2020/142035 priority patent/WO2021089062A1/en
Priority to EP20885366.3A priority patent/EP4057019A4/en
Priority to US17/774,846 priority patent/US20220402396A1/en
Publication of CN112782601A publication Critical patent/CN112782601A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • 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
    • B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
    • 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 method, a system, equipment and a readable storage medium for acquiring the health degree of a battery, wherein the acquisition method comprises the following steps: constructing an SOC table; acquiring battery information of a target rechargeable battery; acquiring target SOC data corresponding to the target rechargeable battery according to the battery information and the SOC table; acquiring current charging data of a target rechargeable battery in a charging time period, wherein the current charging data comprises current charging quantity and current SOC data in the charging time period; correcting the current SOC data according to the target SOC data; and calculating the current SOH of the target rechargeable battery according to the corrected current charging data. According to the invention, the accurate SOC values of the batteries with different battery types under different driving mileage sections are obtained to construct the SOC meter, and further the SOC value in the actual charging process of any battery is corrected, so that more accurate SOH of the battery is obtained, and the attenuation condition of the battery is solved.

Description

Method, system and equipment for acquiring health degree of battery and readable storage medium
Technical Field
The invention belongs to the field of battery health degree detection, and particularly relates to a method, a system and equipment for acquiring battery health degree and a readable storage medium.
Background
At present, a power battery pack is a power source of an electric vehicle, and monitoring and management of a battery are particularly important for stable and efficient operation of the electric vehicle, while an important index of the battery is battery Health (SOH), the SOH is used for representing capacity, Health and performance states of the battery, and is simply a ratio of a performance parameter to a nominal parameter after the battery is used for a period of time, and an SOH value is calculated by a ratio of the capacity discharged by discharging the battery to a cut-off voltage at a certain multiplying power under a full-charge State to the corresponding nominal capacity. The solution is to consider the charging process of the battery as constant, however, the charging process of any battery is not constant through analysis, which results in inaccurate results of the prior solution of the SOH value. How to obtain an accurate SOH value, timely know the current health state of the battery, and predict the future attenuation of the battery has important significance for the use of electric vehicles.
Disclosure of Invention
The invention aims to overcome the defect that the SOH value of a battery acquired in the prior art is inaccurate, and provides a method, a system, equipment and a readable storage medium for acquiring the health degree of the battery.
The invention solves the technical problems through the following technical scheme:
a method for obtaining battery health, the method comprising:
constructing an SOC (state of charge) table, wherein the SOC table is used for reflecting the residual capacity of the battery and storing SOC data of the batteries with different battery types in the charging process under different driving mileage sections;
acquiring battery information of a target rechargeable battery, wherein the battery information comprises a battery model and a current driving mileage of the target rechargeable battery;
acquiring target SOC data corresponding to the target rechargeable battery according to the battery information and the SOC table;
acquiring current charging data of the target rechargeable battery in a charging time period, wherein the current charging data comprises current charging quantity and current SOC data in the charging time period;
correcting the current SOC data according to the target SOC data;
and calculating the current SOH of the target rechargeable battery according to the corrected current charging data.
Preferably, the SOC data is SOC data of a single battery in a single charging cycle, and the step of constructing an SOC table specifically includes:
equally dividing the charging period into a plurality of unit charging periods;
in the charging process, respectively calculating unit SOC data corresponding to each unit charging period based on an integral electric quantity algorithm;
and constructing the SOC table according to all the unit SOC data.
Preferably, the current SOC data includes a charging start SOC and a charging end SOC, and the step of correcting the current SOC data according to the target SOC data specifically includes:
extracting target unit SOC data between unit SOC data corresponding to a charge start SOC and unit SOC data corresponding to a charge end SOC from the target SOC data;
and correcting the difference value between the charging start SOC and the charging end SOC according to the target unit SOC data.
Preferably, the obtaining method solves the current SOH through the following formula, specifically including:
Figure BDA0002260143440000021
(SOCE-SOCS)X＝(SOCE-SOCn-1)+(SOCn-1-SOCn-2)+…+(SOC1-SOCS)
wherein, SOHdIs the current SOH, QCharging deviceFor the current charge, SOCETo end of charge SOC, SOCSTo start the charging SOC, (SOC)E-SOCS)XFor corrected current SOC data, QForehead (forehead)Is a known rated powerN is the number of unit charging cycles included in the charging period, SOCn-1The SOC corresponding to the nth unit charging period from the charging start to the charging end of the target rechargeable battery is obtained by inquiring the SOC table.
An electronic device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the battery health degree acquisition method.
A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the above-mentioned battery health degree acquisition method.
A system for acquiring the health degree of a battery comprises an SOC (system on chip) table construction module, a battery information acquisition module, a target SOC data acquisition module, a current charging data acquisition module, a correction module and an SOH (state of health) acquisition module;
the SOC meter construction module is used for constructing an SOC meter, and the SOC meter stores SOC data of batteries with different battery types in the charging process under different driving mileage sections;
the battery information acquisition module is used for acquiring battery information of a target rechargeable battery, wherein the battery information comprises the battery model and the current driving mileage of the target rechargeable battery;
the target SOC data acquisition module is used for acquiring target SOC data corresponding to the target rechargeable battery according to the battery information and the SOC table;
the current charging data acquisition module is used for acquiring current charging data of the target rechargeable battery in a charging time period, wherein the current charging data comprises current charging quantity and current SOC data in the charging time period;
the correction module is used for correcting the current SOC data according to the target SOC data;
and the SOH acquisition module is used for calculating the current SOH of the target rechargeable battery according to the corrected current charging data.
Preferably, the SOC data is SOC data of a single battery in a single charging cycle, and the SOC table construction module includes a cycle division unit, a unit data acquisition unit, and a construction unit;
the cycle dividing unit is used for averagely dividing the charging cycle into a plurality of unit charging cycles;
the unit data acquisition unit is used for respectively calculating unit SOC data corresponding to each unit charging period based on an integral electric quantity algorithm in the charging process;
the construction unit is used for constructing the SOC table according to all the unit SOC data.
Preferably, the current SOC data includes a charge start SOC and a charge end SOC;
the correction module is used for extracting target unit SOC data between unit SOC data corresponding to the charging start SOC and unit SOC data corresponding to the charging end SOC from the target SOC data, and correcting the difference value between the charging start SOC and the charging end SOC according to the target unit SOC data.
Preferably, the obtaining system solves the current SOH through the following formula, specifically including:
Figure BDA0002260143440000041
(SOCE-SOCS)X＝(SOCE-SOCn-1)+(SOCn-1-SOCn-2)+…+(SOC1-SOCS)
wherein, SOHdIs the current SOH, QCharging deviceFor the current charge, SOCETo end of charge SOC, SOCSTo start the charging SOC, (SOC)E-SOCS)XFor corrected current SOC data, QForehead (forehead)Is a given rated charge, n is the number of unit charging cycles included in the charging period, SOCn-1The SOC corresponding to the nth unit charging period from the charging start to the charging end of the target rechargeable battery is obtained by inquiring the SOC table.
The positive progress effects of the invention are as follows: the method has the advantages that the misinterpretation that the battery charging process is uniform charging in the general meaning is avoided, the SOC table is built based on a large amount of historical battery charging data, accurate SOC values of batteries of different battery types under different driving mileage sections are obtained, further, the SOC value of any battery in the actual charging process is corrected based on the SOC table, more accurate SOH of the battery is further obtained based on the corrected SOC value, and the attenuation condition of the battery is timely solved.
Drawings
Fig. 1 is a flowchart of a method for acquiring a battery health degree according to embodiment 1 of the present invention.
Fig. 2 is a flowchart of step 10 of the method for acquiring the battery health degree according to embodiment 2 of the present invention.
Fig. 3 is an SOC curve diagram of a certain battery model in a range of 0 to 5 kilometers in driving, which is constructed in the method for acquiring the health degree of a battery according to embodiment 2 of the present invention.
Fig. 4 is an SOC curve diagram of a certain battery model constructed in the method for acquiring the health degree of a battery according to embodiment 2 of the present invention, at a distance of 5 to 10 kilometers in driving.
Fig. 5 is a flowchart of step 50 of the method for acquiring the battery health degree according to embodiment 2 of the present invention.
Fig. 6 is a schematic structural diagram of an electronic device according to embodiment 3 of the present invention.
Fig. 7 is a block diagram of a system for acquiring the battery health degree according to embodiment 5 of the present invention.
Fig. 8 is a module diagram of an SOC table constructing module in the system for acquiring battery health degree according to embodiment 6 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
A method for acquiring a battery health degree, as shown in fig. 1, the method includes:
step 10, constructing an SOC (system on chip) table; the SOC table stores SOC data of batteries with different battery types in the charging process under different driving mileage sections;
step 20, acquiring battery information of a target rechargeable battery; the battery information comprises the battery model and the current driving mileage of the target rechargeable battery;
step 30, acquiring target SOC data corresponding to the target rechargeable battery according to the battery information and the SOC table;
step 40, acquiring current charging data of the target rechargeable battery in a charging time period; the current charging data comprises current charging quantity and current SOC data in a charging time period;
it should be noted that the battery capacity may be used as a basis for data calculation, and the battery capacity may also be obtained as a basis for data calculation.
Step 50, correcting the current SOC data according to the target SOC data;
and step 60, calculating the current SOH of the target rechargeable battery according to the corrected current charging data.
In the embodiment, the misinterpretation that the battery charging process is uniform charging in the general meaning is avoided, the SOC table is constructed based on a large amount of historical battery charging data, accurate SOC values of batteries of different battery types under different driving mileage sections are obtained, further the SOC value of any battery in the actual charging process is corrected based on the SOC table, more accurate SOH of the battery is further obtained based on the corrected SOC value, and the attenuation condition of the battery is solved.
Example 2
The method for acquiring the battery health degree in the present embodiment is further improved on the basis of embodiment 1, where the SOC data is SOC data of a single battery in a single charging cycle, as shown in fig. 2, and step 10 specifically includes:
step 101, averagely dividing a charging period into a plurality of unit charging periods; specifically, the whole charging process can be divided into 250 small cycles, and each unit charging cycle occupies 0.4 percentage point.
102, respectively calculating to obtain unit SOC data corresponding to each unit charging period based on an integral electric quantity algorithm in the charging process;
it should be noted that, in the present application, in order to ensure the accuracy of data, an integrated power algorithm may be used to calculate the SOC value, and if the SOC is used as the basis for data calculation, the specific calculation method may be solved by the following formula: the current load voltage and the current load current, if based on the battery capacity as a data calculation basis, the specific calculation method may be solved by the following formula: the current load current is time or is solved based on other better integration algorithms, and the application is not limited in particular.
And 103, constructing an SOC table according to all unit SOC data.
It should be noted that, when constructing the SOC meter, in order to more intuitively understand the SOC values of the batteries of different battery types in different driving mileage sections, the SOC values can be presented in a form of a meter, specifically, as shown in fig. 3 and 4, SOC curves of a battery of a certain battery type in 0 to 5 kilometers driving mileage sections and 5 to 10 kilometers driving mileage sections are respectively listed.
In addition, the current SOC data includes a charge start SOC and a charge end SOC, and further, as shown in fig. 5, step 50 specifically includes:
step 501, extracting target unit SOC data between unit SOC data corresponding to a charging start SOC and unit SOC data corresponding to a charging end SOC from the target SOC data;
step 502, correcting the difference value between the charging start SOC and the charging end SOC according to the target unit SOC data.
In this embodiment, the obtaining method solves the current SOH through the following formula, and specifically includes:
Figure BDA0002260143440000071
(SOCE-SOCS)X＝(SOCE-SOCn-1)+(SOCn-1-SOCn-2)+…+(SOC1-SOCS)
wherein, SOHdIs the current SOH, QCharging deviceFor the current charge, SOCETo end of charge SOC, SOCSTo start the charging SOC, (SOC)E-SOCS)XFor corrected current SOC data, QForehead (forehead)Is a given rated charge, n is the number of unit charging cycles included in the charging period, SOCn-1The SOC corresponding to the nth unit charging period from the charging start to the charging end of the target rechargeable battery is obtained by inquiring the SOC table.
In this embodiment, how to specifically correct the SOC value of any battery based on the SOC table in the construction process of the SOC table and the actual charging process of any battery is further provided.
Example 3
An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for obtaining battery health as described in embodiment 1 or 2 when executing the computer program.
Fig. 6 is a schematic structural diagram of an electronic device provided in this embodiment. FIG. 6 illustrates a block diagram of an exemplary electronic device 90 suitable for use in implementing embodiments of the present invention. The electronic device 90 shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in fig. 6, the electronic device 90 may take the form of a general purpose computing device, which may be a server device, for example. The components of the electronic device 90 may include, but are not limited to: at least one processor 91, at least one memory 92, and a bus 93 that connects the various system components (including the memory 92 and the processor 91).
The bus 93 includes a data bus, an address bus, and a control bus.
Memory 92 may include volatile memory, such as Random Access Memory (RAM)921 and/or cache memory 922, and may further include Read Only Memory (ROM) 923.
Memory 92 may also include a program tool 925 having a set (at least one) of program modules 924, such program modules 924 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The processor 91 executes various functional applications and data processing by running a computer program stored in the memory 92.
The electronic device 90 may also communicate with one or more external devices 94 (e.g., keyboard, pointing device, etc.). Such communication may be through an input/output (I/O) interface 95. Also, the electronic device 90 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via a network adapter 96. The network adapter 96 communicates with the other modules of the electronic device 90 via the bus 93. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 90, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.
It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module, according to embodiments of the application. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
Example 4
A computer-readable storage medium on which a computer program is stored, the program, when executed by a processor, implementing the steps of the battery health degree acquisition method described in embodiment 1 or 2.
More specific examples, among others, that the readable storage medium may employ may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.
In a possible implementation manner, the present invention can also be implemented in the form of a program product including program code for causing a terminal device to execute the steps of implementing the battery health degree acquisition method described in embodiment 1 or 2 when the program product is run on the terminal device.
Where program code for carrying out the invention is written in any combination of one or more programming languages, the program code may execute entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device and partly on a remote device or entirely on the remote device.
Example 5
A battery health degree acquisition system is shown in FIG. 7, and comprises an SOC table construction module 1, a battery information acquisition module 2, a target SOC data acquisition module 3, a current charging data acquisition module 4, a correction module 5 and an SOH acquisition module 6;
the SOC meter constructing module 1 is used for constructing an SOC meter, and the SOC meter stores SOC data of batteries with different battery types in the charging process under different driving mileage sections;
the battery information acquisition module 2 is used for acquiring battery information of a target rechargeable battery, wherein the battery information comprises the battery model and the current driving mileage of the target rechargeable battery;
the target SOC data acquisition module 3 is used for acquiring target SOC data corresponding to the target rechargeable battery according to the battery information and the SOC table;
the current charging data acquisition module 4 is used for acquiring current charging data of the target rechargeable battery in a charging time period, wherein the current charging data comprises current charging quantity and current SOC data in the charging time period;
it should be noted that the battery capacity may be used as a basis for data calculation, and the battery capacity may also be obtained as a basis for data calculation.
The correction module 5 is used for correcting the current SOC data according to the target SOC data;
and the SOH acquisition module 6 is used for calculating the current SOH of the target rechargeable battery according to the corrected current charging data.
In the embodiment, the misinterpretation that the battery charging process is uniform charging in the general meaning is avoided, the SOC table is constructed based on a large amount of historical battery charging data, accurate SOC values of batteries of different battery types under different driving mileage sections are obtained, further the SOC value of any battery in the actual charging process is corrected based on the SOC table, more accurate SOH of the battery is further obtained based on the corrected SOC value, and the attenuation condition of the battery is solved.
Example 6
The system for acquiring the battery health degree of the present embodiment is further improved on the basis of embodiment 5, and the SOC data is SOC data of a single battery in a single charging cycle, as shown in fig. 8, the SOC table building module 1 includes a cycle division unit 11, a unit data acquisition unit 12, and a building unit 13;
the period dividing unit 11 is configured to divide the charging period into a plurality of unit charging periods on average; specifically, the whole charging process can be divided into 250 small cycles, and each unit charging cycle occupies 0.4 percentage point.
The unit data acquisition unit 12 is configured to calculate unit SOC data corresponding to each unit charging cycle based on an integrated power algorithm in the charging process;
it should be noted that, in the present application, in order to ensure the accuracy of data, an integrated power algorithm may be used to calculate the SOC value, and if the SOC is used as the basis for data calculation, the specific calculation method may be solved by the following formula: the current load voltage and the current load current, if based on the battery capacity as a data calculation basis, the specific calculation method may be solved by the following formula: the current load current is time or is solved based on other better integration algorithms, and the application is not limited in particular.
The construction unit 13 is configured to construct an SOC table according to all the unit SOC data.
It should be noted that, when constructing the SOC meter, the SOC value of the battery with different battery types in different driving mileage ranges can be displayed in the form of a meter.
In addition, the current SOC data includes a charge start SOC and a charge end SOC;
further, the correction module 5 is configured to extract target unit SOC data between unit SOC data corresponding to the charging start SOC and unit SOC data corresponding to the charging end SOC from the target SOC data, and correct a difference between the charging start SOC and the charging end SOC according to the target unit SOC data.
In this embodiment, the obtaining system solves the current SOH through the following formula, which specifically includes:
Figure BDA0002260143440000111
(SOCE-SOCS)X＝(SOCE-SOCn-1)+(SOCn-1-SOCn-2)+…+(SOC1-SOCS)
wherein, SOHdIs the current SOH, QCharging deviceFor the current charge, SOCETo end of charge SOC, SOCSTo start the charging SOC, (SOC)E-SOCS)XFor corrected current SOC data, QForehead (forehead)Is a given rated charge, n is the number of unit charging cycles included in the charging period, SOCn-1The SOC corresponding to the nth unit charging period from the charging start to the charging end of the target rechargeable battery is obtained by inquiring the SOC table.
In this embodiment, how to specifically correct the SOC value of any battery based on the SOC table in the construction process of the SOC table and the actual charging process of any battery is further provided.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (10)

1. A method for acquiring a battery health degree is characterized by comprising the following steps:
constructing an SOC (system on chip) table, wherein the SOC table stores SOC data of batteries with different battery types in the charging process under different driving mileage sections;
acquiring battery information of a target rechargeable battery, wherein the battery information comprises a battery model and a current driving mileage of the target rechargeable battery;
acquiring target SOC data corresponding to the target rechargeable battery according to the battery information and the SOC table;
acquiring current charging data of the target rechargeable battery in a charging time period, wherein the current charging data comprises current charging quantity and current SOC data in the charging time period;
correcting the current SOC data according to the target SOC data;
and calculating the current SOH of the target rechargeable battery according to the corrected current charging data.
2. The method according to claim 1, wherein the SOC data is SOC data of a single battery in a single charging cycle, and the step of constructing an SOC table specifically includes:
equally dividing the charging period into a plurality of unit charging periods;
in the charging process, respectively calculating unit SOC data corresponding to each unit charging period based on an integral electric quantity algorithm;
and constructing the SOC table according to all the unit SOC data.
3. The method according to claim 2, wherein the current SOC data includes a charge start SOC and a charge end SOC, and the step of correcting the current SOC data according to the target SOC data specifically includes:
extracting target unit SOC data between unit SOC data corresponding to a charge start SOC and unit SOC data corresponding to a charge end SOC from the target SOC data;
and correcting the difference value between the charging start SOC and the charging end SOC according to the target unit SOC data.
4. The method according to claim 1, wherein the obtaining method solves the current SOH by using the following formula, and specifically comprises:
Figure FDA0002260143430000021
(SOCE-SOCS)X
＝(SOCE-SOCn-1)+(SOCn-1-SOCn-2)+…+(SOC1-SOCS)
wherein, SOHdIs the current SOH, QCharging deviceFor the current charge, SOCETo end of charge SOC, SOCSTo start the charging SOC, (SOC)E-SOCS)XFor corrected current SOC data, QForehead (forehead)Is a given rated charge, n is the number of unit charging cycles included in the charging period, SOCn-1The SOC corresponding to the nth unit charging period from the charging start to the charging end of the target rechargeable battery is obtained by inquiring the SOC table.
5. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for obtaining battery health of any one of claims 1 to 4 when executing the computer program.
6. A computer-readable storage medium on which a computer program is stored, the program, when being executed by a processor, implementing the steps of the battery health acquisition method according to any one of claims 1 to 4.
7. The system for acquiring the health degree of the battery is characterized by comprising an SOC (system on chip) table construction module, a battery information acquisition module, a target SOC data acquisition module, a current charging data acquisition module, a correction module and an SOH (state of health) acquisition module;
the SOC meter construction module is used for constructing an SOC meter, and the SOC meter stores SOC data of batteries with different battery types in the charging process under different driving mileage sections;
the battery information acquisition module is used for acquiring battery information of a target rechargeable battery, wherein the battery information comprises the battery model and the current driving mileage of the target rechargeable battery;
the target SOC data acquisition module is used for acquiring target SOC data corresponding to the target rechargeable battery according to the battery information and the SOC table;
the current charging data acquisition module is used for acquiring current charging data of the target rechargeable battery in a charging time period, wherein the current charging data comprises current charging quantity and current SOC data in the charging time period;
the correction module is used for correcting the current SOC data according to the target SOC data;
and the SOH acquisition module is used for calculating the current SOH of the target rechargeable battery according to the corrected current charging data.
8. The system for acquiring battery health as claimed in claim 7, wherein the SOC data is SOC data of a single battery in a single charging cycle, and the SOC table constructing module includes a cycle division unit, a unit data acquiring unit, and a constructing unit;
the cycle dividing unit is used for averagely dividing the charging cycle into a plurality of unit charging cycles;
the unit data acquisition unit is used for respectively calculating unit SOC data corresponding to each unit charging period based on an integral electric quantity algorithm in the charging process;
the construction unit is used for constructing the SOC table according to all the unit SOC data.
9. The system for acquiring battery health as claimed in claim 8, wherein the current SOC data includes a charge start SOC and a charge end SOC;
the correction module is used for extracting target unit SOC data between unit SOC data corresponding to the charging start SOC and unit SOC data corresponding to the charging end SOC from the target SOC data, and correcting the difference value between the charging start SOC and the charging end SOC according to the target unit SOC data.
10. The system for acquiring battery health as defined in claim 7, wherein the system for acquiring solves the current SOH by the following formula, specifically comprising:
Figure FDA0002260143430000031
(SOCE-SOCS)X
＝(SOCE-SOCn-1)+(SOCn-1-SOCn-2)+…+(SOC1-SOCS)
wherein, SOHdIs the current SOH, QCharging deviceFor the current charge, SOCETo end of charge SOC, SOCSTo start the charging SOC, (SOC)E-SOCS)XFor corrected current SOC data, QForehead (forehead)Is a given rated charge, n is the number of unit charging cycles included in the charging period, SOCn-1The SOC corresponding to the nth unit charging period from the charging start to the charging end of the target rechargeable battery is obtained by inquiring the SOC table.
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