CN-122017592-A - Method and device for determining gas production of battery, storage medium, electronic device and program product

CN122017592ACN 122017592 ACN122017592 ACN 122017592ACN-122017592-A

Abstract

The application discloses a method, a device, a storage medium, an electronic device and a program product for determining the gas production of a battery, which relate to the technical field of gas production calculation of the battery and comprise the steps of obtaining the gas production parameter of the battery from the operating condition parameters of the battery, wherein the gas production parameter of the battery comprises a stored internal pressure parameter and a circulating internal pressure parameter; and obtaining the battery gas yield by utilizing the first gas yield and the second gas yield, solving the technical problem that the battery gas yield cannot be predicted accurately in time, and further improving the prediction accuracy and timeliness of the battery gas yield.

Inventors

GAO PO
GAO MENGMENG
LING HAO
MA RUIJUN

Assignees

中创新航科技集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260210

Claims (18)

1. A method for determining the gas production of a battery, comprising at least: Acquiring a battery gas production parameter from battery operation condition parameters, wherein the battery gas production parameter comprises a stored internal pressure parameter and a circulating internal pressure parameter; calculating a first gas production using the stored internal pressure parameter and a second gas production using the cyclical internal pressure parameter; And obtaining the gas yield of the battery by utilizing the first gas yield and the second gas yield.
2. The method of determining the gas production of a battery according to claim 1, wherein calculating the first gas production using the stored internal pressure parameter comprises: Acquiring a battery charge state, a first temperature and a storage time from the stored internal pressure parameter; determining a stored gas production equation for calculating a first gas production, and calculating the battery charge state, the first temperature and the storage time by using the stored gas production equation to obtain the first gas production.
3. The method of determining the gas production of a battery of claim 2, wherein calculating the battery state of charge, the first temperature, and the storage time using the stored gas production equation to obtain the first gas production comprises: Substituting the battery charge state into a charge state factor of the stored gas production equation, substituting the first temperature into a first temperature factor of the stored gas production equation, and substituting the storage time into a time factor of the stored gas production equation to obtain the first gas production.
4. A method of determining the gas production of a battery according to claim 3, wherein the stored gas production equation is expressed as: △p s =A×f（SOC）×f 1 (T)×f(t); Wherein a represents a constant, f (SOC) represents the state of charge factor term, f 1 (T) represents the first temperature factor term, and f (T) represents the time factor term.
5. The method of determining gas production of a battery of claim 4, further comprising: Acquiring a historical temperature, a historical state of charge (SOC) corresponding to the historical temperature and a historical stored gas production corresponding to the historical SOC from the historical stored internal pressure parameter; Fitting the historical temperature, the historical SOC and the historical stored gas production by using a fitting algorithm to obtain a first fitting equation, wherein the first fitting equation is used for representing the historical stored gas production corresponding to the historical SOC at the historical temperature, and the first fitting equation at least comprises one of a polynomial equation corresponding to a first SOC interval and a linear equation corresponding to a second SOC interval, the SOCs in the first SOC interval are all smaller than a preset threshold, and the SOCs in the second SOC interval are equal to or larger than the preset threshold; the charge state factor term and the first temperature factor term are determined based on fitting parameters of the first fitting equation.
6. The method of claim 5, wherein the fitting parameters of the first fitting equation include at least a fitting temperature parameter for indicating a degree of influence of the historical temperature on the historical stored gas yield, a fitting SOC parameter for indicating a degree of influence of the historical SOC on the historical stored gas yield, and determining the state of charge factor term and the first temperature factor term based on the fitting parameters of the fitting equation, comprising: determining a first temperature coefficient according to the fitting temperature parameter, and determining a first temperature factor item according to the first temperature coefficient and a first equation corresponding to the first temperature coefficient; and determining the charge state factor according to the fitting SOC parameters.
7. The method of claim 6, wherein the first equation is expressed as f 1 (T) =exp (-k 2/(273.15+t)), k2 is a fitting temperature coefficient, T is a temperature, and the state of charge factor term is expressed as f (SOC) =k1soc, and k1 is a fitting SOC parameter.
8. The method of determining the gas yield of a battery according to claim 1, wherein calculating a second gas yield using the cyclical internal pressure parameter comprises: Obtaining the battery discharging depth, the second temperature and the discharging multiplying power from the circulating internal pressure parameter; Determining a circulating gas production equation for calculating a second gas production, and calculating the depth of discharge of the battery, the second temperature and the discharge multiplying power by using the circulating gas production equation to obtain the second gas production.
9. The method of claim 8, wherein calculating the depth of discharge, the second temperature, and the discharge rate of the battery using the cyclic gas production equation to obtain the second gas production comprises: Substituting the battery depth of discharge into a depth of discharge factor term of the cyclic gas production equation, substituting the second temperature into a second temperature factor term of the cyclic gas production equation, and substituting the discharge multiplying power into a discharge multiplying power factor term of the cyclic gas production equation to obtain the second gas production.
10. The method of claim 9, wherein the cyclic gas production equation is expressed as: △P c =B×f（DOD）×f（Drate）×f 2 (T); Wherein B represents a constant, f (DOD) represents the depth of discharge factor term, f (date) represents the discharge rate factor term, and f 2 (T) represents the second temperature factor term.
11. The method of determining gas production of a battery of claim 10, further comprising: Acquiring a historical temperature, a historical depth of discharge DOD corresponding to the historical temperature and a historical cycle gas production corresponding to the historical DOD from the historical cycle internal pressure parameter; Fitting the historical temperature, the DOD and the historical circulating gas production by using a fitting algorithm to obtain a second fitting equation, wherein the second fitting equation is used for representing the historical stored gas production corresponding to the historical DOD at the historical temperature; The depth of discharge factor term is determined based on fitting parameters of the second fitting equation.
12. The method of claim 11, wherein the fitting parameters of the second fitting equation include at least fitting DOD parameters for indicating a degree of influence of the historical DOD on the historical stored gas production, wherein determining the depth of discharge factor term based on the fitting parameters of the second fitting equation comprises: and determining the depth of discharge factor term based on a second equation corresponding to the fitting DOD parameter, wherein the second equation is expressed as f (DOD) =k3DOD, and k3 is the fitting DOD parameter.
13. The method of determining gas production of a battery of claim 10, further comprising: acquiring a historical temperature, a historical discharge multiplying power Drate corresponding to the historical temperature and a historical circulating gas production corresponding to the history Drate from the historical stored internal pressure parameter; Fitting the historical temperature, the history Drate and the historical cyclic gas production by using a fitting algorithm to obtain a third fitting equation, wherein the third fitting equation is used for representing the historical stored gas production corresponding to the history Drate at the historical temperature; and determining the discharge rate factor item based on fitting parameters of the third fitting equation.
14. The method of claim 13, wherein the fitting parameters of the third fitting equation include at least fitting Drate parameters for indicating a degree of influence of the history Drate on the historic stored gas yield, wherein determining the discharge rate factor term based on the fitting parameters of the third fitting equation comprises: and determining the discharge rate factor item based on a third party program corresponding to the fitting Drate parameter, wherein the third party program is expressed as f (date) =k Drate, and k4 is the fitting Drate parameter.
15. A device for determining the gas production of a battery, comprising: The device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring battery gas production parameters from battery operation condition parameters, and the battery gas production parameters comprise stored internal pressure parameters and circulating internal pressure parameters; a calculation module for calculating a first gas production using the stored internal pressure parameter and a second gas production using the cyclical internal pressure parameter; and the obtaining module is used for obtaining the battery gas yield by utilizing the first gas yield and the second gas yield.
16. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored program, wherein the program when run performs the method of any one of claims 1 to 14.
17. An electronic device comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to execute the method according to any of claims 1 to 14 by means of the computer program.
18. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method as claimed in any one of claims 1 to 14.

Description

Method and device for determining gas production of battery, storage medium, electronic device and program product Technical Field The application relates to the technical field of battery gas production calculation, in particular to a method and a device for determining battery gas production, a storage medium, an electronic device and a program product. Background In modern energy systems, lithium batteries play an indispensable role by virtue of their excellent energy density and cycle performance. However, internal gas generation inherent in lithium batteries causes changes in internal pressure of the batteries, which threatens the safety and performance of the batteries. At present, the gas production internal pressure prediction method mainly depends on a traditional physicochemical model, but the model has limited prediction accuracy aiming at complex working conditions, and the model construction and verification processes are complicated and have long period, so that resources are consumed, instant prediction information cannot be provided during battery operation or product iteration, and timeliness of fault investigation is restricted. Therefore, in the related art, there is a technical problem that the gas production of the battery cannot be accurately predicted in time. Aiming at the technical problem that the gas production of a battery cannot be timely and accurately predicted in the related art, an effective solution is not proposed yet. Disclosure of Invention The embodiment of the application provides a method, a device, a storage medium, an electronic device and a program product for determining the gas production of a battery, which at least solve the technical problem that the gas production of the battery cannot be accurately predicted in time in the related technology. According to one embodiment of the application, a method for determining the gas production of a battery is provided, and the method comprises the steps of obtaining the gas production parameter of the battery from the operating condition parameters of the battery, wherein the gas production parameter of the battery comprises a stored internal pressure parameter and a circulating internal pressure parameter, calculating a first gas production by using the stored internal pressure parameter, calculating a second gas production by using the circulating internal pressure parameter, and obtaining the gas production of the battery by using the first gas production and the second gas production. In one exemplary embodiment, calculating the first gas production using the stored internal pressure parameter includes obtaining a battery state of charge, a first temperature, and a storage time from the stored internal pressure parameter, determining a stored gas production equation for calculating the first gas production, and calculating the battery state of charge, the first temperature, and the storage time using the stored gas production equation to obtain the first gas production. In one exemplary embodiment, calculating the battery state of charge, the first temperature, and the storage time using the stored gas production equation to obtain the first gas production includes substituting the battery state of charge into a state of charge factor term of the stored gas production equation, substituting the first temperature into a first temperature factor term of the stored gas production equation, and substituting the storage time into a time factor term of the stored gas production equation to obtain the first gas production. In one exemplary embodiment, the stored gas production equation is expressed as Δp s=A×f（SOC）×f1 (T). Times.f (T), where A represents a constant, f (SOC) represents the state of charge factor term, f 1 (T) represents the first temperature factor term, and f (T) represents the time factor term. In one exemplary embodiment, the method further comprises the steps of obtaining a historical temperature, a historical state of charge (SOC) corresponding to the historical temperature and a historical stored gas yield corresponding to the historical SOC from historical stored internal pressure parameters, fitting the historical temperature, the historical SOC and the historical stored gas yield by using a fitting algorithm to obtain a first fitting equation, wherein the first fitting equation is used for representing the historical stored gas yield corresponding to the historical SOC at the historical temperature, the first fitting equation at least comprises one of a polynomial equation corresponding to a first SOC interval, a linear equation corresponding to a second SOC interval, the SOCs in the first SOC interval are all smaller than a preset threshold value, the SOCs in the second SOC interval are equal to or larger than the preset threshold value, and the state of charge factor item and the first temperature factor item are determined based on the fitting parameters of the first fitting equation. In one ex