CN112415403B - Battery self-discharge test method and device, storage medium and equipment - Google Patents
Battery self-discharge test method and device, storage medium and equipment Download PDFInfo
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- CN112415403B CN112415403B CN202011157948.XA CN202011157948A CN112415403B CN 112415403 B CN112415403 B CN 112415403B CN 202011157948 A CN202011157948 A CN 202011157948A CN 112415403 B CN112415403 B CN 112415403B
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
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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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
Abstract
The embodiment of the invention discloses a battery self-discharge testing method, a device, a storage medium and equipment, wherein the method comprises the following steps: the method comprises the steps of obtaining charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, and determining the self-discharging current value of the battery to be tested according to the obtained charging data of the two times of charging, wherein the self-discharging current value is used for evaluating the self-discharging performance of the battery to be tested. The self-discharge test method of the battery is simple in operation process, low in test equipment investment and beneficial to batch operation.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery self-discharge testing method, a device, a storage medium and equipment.
Background
The use of batteries in many fields needs to be combined and used in parallel or/and series, and the consistency of various performances of each combined single battery needs to be ensured in the combined use process, wherein the self-discharge of the battery is a key performance. The current method for testing the self-discharge of the battery comprises the following steps: voltage comparison method, residual capacity method and float current method. However, the current method for testing the self-discharge of the battery has low accuracy, and the matching effect is influenced; or the test process is complicated and is not beneficial to batch operation; or the equipment investment for testing is high.
Disclosure of Invention
In view of the above, it is desirable to provide a method, an apparatus, a storage medium and a device for testing self-discharge of a battery, which are used to calculate a self-discharge current value of a battery to be tested by performing two charging operations including a first charging and a second charging on the battery to be tested, so as to evaluate the self-discharge performance of the battery to be tested by using the self-discharge current value of the battery to be tested.
In a first aspect, the present application provides a battery self-discharge testing method, the method comprising:
acquiring charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, wherein the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is kept still for a preset time, and the charging capacity value of the second charging of the battery to be tested;
and determining the self-discharge current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, wherein the self-discharge current value is used for evaluating the self-discharge performance of the battery to be tested.
Optionally, the determining the self-discharge current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging, and the charging capacity value of the second charging includes:
performing difference operation on the starting time of the second charging and the ending time of the first charging to obtain a difference value between the starting time of the second charging and the ending time of the first charging;
and carrying out ratio operation on the charging capacity value of the secondary charging and the difference value to obtain a self-discharging current value of the battery to be detected.
Optionally, the same environment refers to having the same environmental parameter, and the environmental parameter includes an environmental temperature; the charging parameters include a charging current, a cutoff voltage, and a cutoff current.
In a second aspect, the present application provides a battery self-discharge testing apparatus, the apparatus comprising:
the system comprises an acquisition module, a charging module and a charging module, wherein the acquisition module is used for acquiring charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, and the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is kept still for a preset time length, and the charging capacity value of the second charging of the battery to be tested;
and the determining module is used for determining the self-discharge current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, wherein the self-discharge current value is used for evaluating the self-discharge performance of the battery to be tested.
In a third aspect, the present application provides a computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of:
acquiring charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, wherein the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is kept still for a preset time, and the charging capacity value of the second charging of the battery to be tested;
and determining the self-discharge current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, wherein the self-discharge current value is used for evaluating the self-discharge performance of the battery to be tested.
In a fourth aspect, the present application provides a battery self-discharge testing device comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of:
acquiring charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, wherein the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is kept still for a preset time, and the charging capacity value of the second charging of the battery to be tested;
and determining the self-discharge current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, wherein the self-discharge current value is used for evaluating the self-discharge performance of the battery to be tested.
Optionally, the test side of the battery self-discharge test equipment is electrically connected to the battery to be tested.
Optionally, the battery self-discharge test equipment is used for controlling the connection and disconnection of a charging circuit between the battery to be tested and the battery to be tested, and acquiring the charging data.
Optionally, the battery self-discharge test equipment is provided with a frame, and the battery to be tested is placed in the frame.
Optionally, the battery self-discharge testing device is provided with a temperature control device, and the temperature control device is used for controlling the temperature in the frame, so that the battery to be tested is tested in the same environment.
The embodiment of the invention has the following beneficial effects:
the invention discloses a battery self-discharge test method, a device, a storage medium and equipment, wherein the method comprises the following steps: the method comprises the steps of obtaining charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, wherein the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is kept still for a preset time, and the charging capacity value of the second charging of the battery to be tested, and determining the self-discharging current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, wherein the self-discharging current value is used for evaluating the self-discharging performance of the battery to be tested. The self-discharge test method of the battery is simple in operation process, low in test equipment investment and beneficial to batch operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a schematic flow chart of a method for testing self-discharge of a battery according to an embodiment;
FIG. 2 is a schematic diagram of a self-discharge testing apparatus for a battery according to an embodiment;
FIG. 3 is a block diagram of a self-discharge testing apparatus for a battery according to an embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of a battery self-discharge testing method in one embodiment, the method includes:
in the embodiment of the present application, the same environment means having the same environmental parameters, including the environmental temperature; the charging parameters include a charging current, a cutoff voltage, and a cutoff current.
Specifically, the battery to be tested is charged for the first time at a certain environmental temperature, and the first charging of the battery to be tested is performed in a constant-current and constant-voltage mode, so that the first charging process has certain charging parameters, and the charging parameters comprise certain charging current, certain cut-off voltage and certain cut-off current. When the first charging of the battery to be tested reaches the preset electric quantity, stopping the charging of the battery to be tested and recording the time point when the charging is stopped, namely the ending time t of the first charging1. And standing the battery to be tested after the first charging in a constant temperature environment for a preset time, wherein the preset time is preferably more than 3 days. After the battery to be tested is kept still for a preset time, the battery to be tested is charged for the second time, the second charging of the battery to be tested is also carried out in a constant-current and constant-voltage mode, the environment temperature for carrying out the second charging on the battery to be tested is the same as the environment temperature for carrying out the first charging on the battery to be tested, and the charging current, the cut-off voltage and the cut-off current of the second charging are also the same as those of the first charging. When the second charging of the battery to be measured is started, the time point when the charging is started, namely the starting time t of the second charging is recorded2. And when the electric quantity for carrying out secondary charging on the battery to be tested reaches the preset electric quantity, stopping charging the battery to be tested and recording the charging capacity value when the charging is stopped, namely the charging capacity value Q of the secondary charging.
In order to ensure the accuracy of the battery self-discharge testing method, the cut-off voltage during the two times of charging can be selected from the required voltage during the general shipment or warehousing of the battery, and can also be adjusted according to the actual requirement; the charging current in the two times of charging is not more than 0.3C, and in the embodiment of the application, the preferable charging current value is 0.1C to 0.2C; the off current at the time of the two-time charging should not exceed 0.05C, and in the present embodiment, the preferred off current value is 0.01C to 0.02C.
And 102, determining a self-discharge current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, wherein the self-discharge current value is used for evaluating the self-discharge performance of the battery to be tested.
In the embodiment of the present application, a self-discharge current value of the battery to be tested is determined according to the end time of the first charging, the start time of the second charging, and the charging capacity value of the second charging, specifically, a difference between the start time of the second charging and the end time of the first charging is obtained by performing a difference operation on the start time of the second charging and the end time of the first charging, and a ratio operation is performed on the charging capacity value of the second charging and the difference value to obtain the self-discharge current value of the battery to be tested.
Specifically, the obtained end time of the first charging is t1The acquired starting time of the second charging is t2The obtained charge capacity value of the second charge is Q, where t1And t2In hours, and Q in milliamp hours. Therefore, the specific calculation formula of the self-discharge current value is: q/(t)2-t1) The unit of the self-discharge current value is milliampere.
In an embodiment of the present application, a method for testing self-discharge of a battery includes: the method comprises the steps of obtaining charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, wherein the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is kept still for a preset time, and the charging capacity value of the second charging of the battery to be tested, and determining the self-discharging current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, wherein the self-discharging current value is used for evaluating the self-discharging performance of the battery to be tested. The self-discharge test method of the battery is simple in operation process, low in test equipment investment and beneficial to batch operation.
As shown in fig. 2, which is a schematic structural diagram of a battery self-discharge testing apparatus in an embodiment, the apparatus includes:
the acquiring module 201 is configured to acquire charging data of a battery to be tested that is charged twice in an adjacent manner under the same environment and the same charging parameters, where the charging data includes an end time of a first charging of the battery to be tested, a start time of a second charging of the battery to be tested that is performed after the battery to be tested is placed for a preset time period, and a charging capacity value of the second charging of the battery to be tested;
a determining module 202, configured to determine a self-discharge current value of the battery to be tested according to the end time of the first charging, the start time of the second charging, and the charge capacity value of the second charging, where the self-discharge current value is used to evaluate a self-discharge performance of the battery to be tested.
In an embodiment of the present application, a battery self-discharge testing apparatus includes: the device comprises an obtaining module 201, a determining module 202, and a self-discharging current value, wherein the obtaining module 201 is used for obtaining charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is placed for a preset time length, and the charging capacity value of the second charging of the battery to be tested, and the determining module is used for determining the self-discharging current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, and the self-discharging current value is used for evaluating the self-discharging performance of the battery to be tested. The self-discharge testing method of the battery is simple in operation process, low in equipment investment for testing and beneficial to batch operation.
FIG. 3 is a block diagram showing a configuration of a battery self-discharge test apparatus according to an embodiment. The battery self-discharge testing device can be a terminal or a server. As shown in fig. 3, the battery self-discharge test apparatus includes a processor, a memory, and a network interface connected through a system bus. Wherein the memory includes a non-volatile storage medium and an internal memory. The nonvolatile storage medium of the battery self-discharge testing device stores an operating system and also stores a computer program, and when the computer program is executed by a processor, the computer program can enable the processor to realize the battery self-discharge testing method. The internal memory may also have a computer program stored therein, which when executed by the processor, causes the processor to perform a battery self-discharge testing method. It will be understood by those skilled in the art that the structure shown in fig. 3 is a block diagram of only a portion of the structure relevant to the present application, and does not constitute a limitation on the battery self-discharge testing device to which the present application is applied, and a particular battery self-discharge testing device may include more or less components than those shown in the drawings, or combine certain components, or have a different arrangement of components.
In one embodiment, the present application provides a battery self-discharge testing device comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of:
acquiring charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, wherein the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is kept still for a preset time, and the charging capacity value of the second charging of the battery to be tested;
and determining the self-discharge current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, wherein the self-discharge current value is used for evaluating the self-discharge performance of the battery to be tested.
In the embodiment of the application, the testing side of the battery self-discharge testing equipment is electrically connected with the battery to be tested.
In the embodiment of the application, the battery self-discharge test equipment is used for controlling the connection and the disconnection of a charging circuit between the battery self-discharge test equipment and a battery to be tested and collecting charging data.
In the embodiment of the application, the battery self-discharge test equipment is provided with a frame body, and a battery to be tested is placed in the frame body.
In the embodiment of the application, the battery self-discharge testing equipment is provided with a temperature control device, and the temperature control device is used for controlling the temperature in the frame body so as to test the battery to be tested in the same environment.
In one embodiment, the present application provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the steps of:
acquiring charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, wherein the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is kept still for a preset time, and the charging capacity value of the second charging of the battery to be tested;
and determining the self-discharge current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, wherein the self-discharge current value is used for evaluating the self-discharge performance of the battery to be tested.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A method for testing self-discharge of a battery, the method comprising:
acquiring charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, wherein the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is kept still for a preset time, and the charging capacity value of the second charging of the battery to be tested;
determining a self-discharge current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging, wherein the self-discharge current value is used for evaluating the self-discharge performance of the battery to be tested;
wherein, the determining the self-discharge current value of the battery to be tested according to the ending time of the first charging, the starting time of the second charging and the charging capacity value of the second charging comprises:
performing difference operation on the starting time of the second charging and the ending time of the first charging to obtain a difference value between the starting time of the second charging and the ending time of the first charging;
and carrying out ratio operation on the charging capacity value of the secondary charging and the difference value to obtain a self-discharging current value of the battery to be detected.
2. The battery self-discharge testing method of claim 1, wherein the same environment refers to having the same environmental parameters, including ambient temperature; the charging parameters include a charging current, a cutoff voltage, and a cutoff current.
3. A battery self-discharge testing apparatus, the apparatus comprising:
the system comprises an acquisition module, a charging module and a charging module, wherein the acquisition module is used for acquiring charging data of two adjacent times of charging of a battery to be tested under the same environment and the same charging parameters, and the charging data comprises the ending time of the first charging of the battery to be tested, the starting time of the second charging of the battery to be tested after the battery to be tested is kept still for a preset time length, and the charging capacity value of the second charging of the battery to be tested;
the determining module is specifically configured to perform difference operation on the start time of the second charging and the end time of the first charging to obtain a difference between the start time of the second charging and the end time of the first charging; and carrying out ratio operation on the charging capacity value of the secondary charging and the difference value to obtain a self-discharging current value of the battery to be detected.
4. A computer-readable storage medium, storing a computer program which, when executed by a processor, causes the processor to carry out the steps of the method according to any one of claims 1 to 2.
5. A battery self-discharge testing device, characterized in that the battery self-discharge testing device comprises a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to carry out the steps of the method according to any one of claims 1 to 2.
6. The battery self-discharge testing device of claim 5, wherein a testing side of the battery self-discharge testing device is electrically connected to the battery under test.
7. The battery self-discharge test device of claim 6, wherein the battery self-discharge test device is used for controlling the on and off of a charging circuit with the battery under test and the collection of the charging data.
8. The battery self-discharge test device of claim 7, wherein the battery self-discharge test device has a frame in which the battery under test is placed.
9. The battery self-discharge test device of claim 8, wherein the battery self-discharge test device has a temperature control device for controlling the temperature within the housing such that the battery under test is tested in the same environment.
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| CN113552487B (en) * | 2021-06-24 | 2023-04-07 | 武汉昊诚锂电科技股份有限公司 | Self-discharge measurement and service life evaluation method of lithium secondary battery |
| CN113359043B (en) * | 2021-08-09 | 2021-10-15 | 江苏时代新能源科技有限公司 | Method, device and equipment for detecting self-discharge current of battery cell and computer storage medium |
| CN114552039A (en) * | 2022-02-24 | 2022-05-27 | 深圳市涞顿科技有限公司 | Control method for battery constant-charge self-maintenance and constant-charge self-maintenance battery |
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