Battery pack aging detection method and system

Abstract

The invention provides a battery pack aging detection method and system, and the method comprises the steps: obtaining battery pack structure data, a battery pack charging and discharging mode and operation environment data of a battery pack, and constructing a battery pack model of the battery pack based on the battery pack structure data and the battery pack charging and discharging mode; identifying sub-operation environment data of each environment type, and acquiring historical operation data of the battery pack of each environment type; through a parameter conversion program, generating an operation environment parameter of each environment type and a battery pack operation parameter range, and generating a battery pack aging test strategy of each environment type; and based on the environment parameters of each environment type and the battery pack aging test strategy of each environment type, controlling a battery pack aging cabinet, and executing the charging and discharging process of the battery pack under the aging test strategy condition to obtain an aging test result of each environment type. By adopting the scheme, the aging test comprehensiveness and the aging test accuracy of the battery pack can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack aging detection, and in particular to a battery pack aging detection method and system. Background Art

[0002] Battery pack aging testing is designed to evaluate the performance and life of the battery. This process involves charging and discharging the battery to simulate actual use, while monitoring the battery's performance indicators, such as voltage and current, to evaluate the battery's health and life. During the test, the accuracy of the aging test is greatly affected by the deviation between the test environment and the actual environment, the deviation between the test frequency and actual use, and the deviation between the test battery operation mode and the actual battery operation mode. Therefore, how to improve the accuracy of the aging test is the current research focus.

[0003] The traditional method of battery pack aging detection is to perform aging tests on each battery pack through an aging cabinet. However, there is a deviation between the simulation process of the traditional aging cabinet and the actual use process, which leads to poor accuracy of the battery pack aging test. Summary of the invention

[0004] The main purpose of the present invention is to provide a battery pack aging detection method, which aims to solve the problem in the prior art that the aging test accuracy of the battery pack is poor due to the deviation between the simulation process of the traditional aging cabinet and the actual use process.

[0005] To achieve the above object, the present invention provides a battery pack aging detection method, the method comprising:

[0006] Acquire battery pack structure data of a battery pack, a battery pack charge and discharge mode of the battery pack, and operating environment data of the battery pack, and construct a battery pack model of the battery pack based on the battery pack structure data and the battery pack charge and discharge mode;

[0007] Based on the operating environment data, identifying sub-operating environment data of each environment type, and obtaining historical operating data of the battery pack of each environment type in a historical database;

[0008] Based on the sub-operating environment data of each environment type and the historical operating data of the battery pack of each environment type, the operating environment parameters of each environment type and the operating parameter range of the battery pack of each environment type are generated through a parameter conversion program, and based on the operating parameter range of the battery pack of each environment type and the battery pack model, an aging test strategy for the battery pack of each environment type is generated;

[0009] Based on the environmental parameters of each of the environmental types and the battery pack aging test strategy of each of the environmental types, the battery pack aging cabinet is controlled to execute the charging and discharging process of the battery pack under the aging test strategy conditions to obtain the aging test results of each of the environmental types.

[0010] Optionally, constructing a battery pack model of the battery pack based on the battery pack structure data and the battery pack charging and discharging mode includes:

[0011] Based on the battery pack structure data, identifying the three-dimensional structure data of each battery of the battery pack and the structural connection relationship between the batteries, and constructing a three-dimensional structure model of each battery based on the three-dimensional structure data of each battery;

[0012] Based on the structural connection relationship between the batteries, the three-dimensional structural models of the batteries are structurally spliced ​​to obtain the three-dimensional structural model of the battery pack, and based on the charging and discharging mode of the battery pack, the charging and discharging parameters of the battery pack are generated through a parameter conversion program;

[0013] Based on the charge and discharge parameters of the battery pack, a model assignment process is performed on the three-dimensional structure model of the battery pack to obtain a battery pack model of the battery pack.

[0014] Optionally, the identifying, based on the operating environment data, sub-operating environment data of each environment type includes:

[0015] Obtaining each piece of environment identification information of the operating environment data, and querying the environment type corresponding to each piece of environment identification information in the environment database;

[0016] Based on each of the environment identification information, the data content corresponding to each environment identification information is queried in the operating environment data, and the data content corresponding to each environment identification information is used as sub-operating environment data of the environment type corresponding to each environment identification information.

[0017] Optionally, the generating of the operating environment parameters of each environment type and the operating parameter range of the battery pack of each environment type through a parameter conversion program based on the sub-operating environment data of each environment type and the historical operating data of the battery pack of each environment type includes:

[0018] For each environment type, based on the sub-operating environment data of the environment type, identifying the influencing factor value of each environment influencing factor of the environment type, and based on the influencing factor value of each environment influencing factor, identifying the influencing parameter value of each environment influencing factor through a parameter conversion program;

[0019] Taking the influencing parameter values ​​of all environmental influencing factors as the operating environment parameters of the environment type, and identifying the operating data distribution information of the battery pack based on the historical operating data of the battery pack of the environment type;

[0020] Based on the operation data distribution information of the battery pack, the operation data range of the battery pack is identified, and the operation data range is converted into the battery pack operation parameter range through the parameter conversion program.

[0021] Optionally, the generating of a battery pack aging test strategy for each environment type based on the battery pack operating parameter range for each environment type and the battery pack model includes:

[0022] Acquire the operation process of the battery pack and the aging test process of the battery pack, and for each environment type, generate each simulation operation process of the battery pack based on the battery pack operation parameter range of the environment type and the operation process by a single variable method;

[0023] By using the battery pack model, the operation process of each simulation operation process is simulated to obtain the operation result of each simulation operation process, and the simulation operation process corresponding to the operation result without operation abnormality is used as the target simulation operation process;

[0024] Based on the battery group target operating parameters corresponding to each of the target simulation operating processes and the aging test process, a sub-battery group aging test strategy corresponding to each battery group target operating parameter is constructed, and the sub-battery group aging test strategies corresponding to all battery group target operating parameters are used as the battery group aging test strategies for the environment type.

[0025] Optionally, the environmental parameters of each environment type and the battery pack aging test strategy of each environment type are used to control the battery pack aging cabinet, execute the charging and discharging process of the battery pack under the aging test strategy conditions, and obtain the aging test results of each environment type, including:

[0026] Based on the environmental parameters of each of the environmental types, the instruction generation program of the battery pack aging cabinet is used to generate simulation environment instructions corresponding to each of the environmental types, and based on each sub-aging test strategy of each environmental type, the instruction generation program of the battery pack aging cabinet is used to generate test instructions for each of the sub-aging test strategies;

[0027] Sending the simulation environment instructions corresponding to each of the environment types and the test instructions of each sub-aging test strategy of each of the environment types to the battery aging cabinet respectively, and controlling the battery aging cabinet to generate a simulation environment of the environment type based on the simulation environment instructions;

[0028] Based on the test instructions of each sub-aging test strategy, control the battery pack aging cabinet to simulate the charge and discharge process of each sub-aging test strategy to obtain the sub-aging test result of each sub-aging test strategy;

[0029] The sub-aging test results of each sub-aging test strategy of each environment type are used as the aging test results of the environment type.

[0030] In addition, to achieve the above-mentioned purpose, the present invention also provides a battery pack aging detection system, the battery pack aging detection system comprising:

[0031] an acquisition module, used to acquire battery pack structure data of a battery pack, a battery pack charge and discharge mode of the battery pack, and operating environment data of the battery pack, and construct a battery pack model of the battery pack based on the battery pack structure data and the battery pack charge and discharge mode;

[0032] An identification module, used to identify sub-operating environment data of each environment type based on the operating environment data, and obtain historical operating data of the battery pack of each environment type in a historical database;

[0033] A generating module, configured to generate operating environment parameters of each environment type and operating parameter ranges of the battery packs of each environment type through a parameter conversion program based on the sub-operating environment data of each environment type and the historical operating data of the battery packs of each environment type, and to generate an aging test strategy for the battery packs of each environment type based on the operating parameter ranges of the battery packs of each environment type and the battery pack model;

[0034] The control module is used to control the battery pack aging cabinet based on the environmental parameters of each environmental type and the battery pack aging test strategy of each environmental type, execute the charging and discharging process of the battery pack under the aging test strategy conditions, and obtain the aging test results of each environmental type.

[0035] Optionally, the acquisition module is specifically used to:

[0036] Based on the battery pack structure data, identifying the three-dimensional structure data of each battery of the battery pack and the structural connection relationship between the batteries, and constructing a three-dimensional structure model of each battery based on the three-dimensional structure data of each battery;

[0037] Based on the structural connection relationship between the batteries, the three-dimensional structural models of the batteries are structurally spliced ​​to obtain the three-dimensional structural model of the battery pack, and based on the charging and discharging mode of the battery pack, the charging and discharging parameters of the battery pack are generated through a parameter conversion program;

[0038] Based on the charge and discharge parameters of the battery pack, a model assignment process is performed on the three-dimensional structure model of the battery pack to obtain a battery pack model of the battery pack.

[0039] Optionally, the identification module is specifically used to:

[0040] Obtaining each piece of environment identification information of the operating environment data, and querying the environment type corresponding to each piece of environment identification information in the environment database;

[0041] Based on each of the environment identification information, the data content corresponding to each environment identification information is queried in the operating environment data, and the data content corresponding to each environment identification information is used as sub-operating environment data of the environment type corresponding to each environment identification information.

[0042] Optionally, the generating module is specifically used for:

[0043] For each environment type, based on the sub-operating environment data of the environment type, identifying the influencing factor value of each environment influencing factor of the environment type, and based on the influencing factor value of each environment influencing factor, identifying the influencing parameter value of each environment influencing factor through a parameter conversion program;

[0044] Taking the influencing parameter values ​​of all environmental influencing factors as the operating environment parameters of the environment type, and identifying the operating data distribution information of the battery pack based on the historical operating data of the battery pack of the environment type;

[0045] Based on the operation data distribution information of the battery pack, the operation data range of the battery pack is identified, and the operation data range is converted into the battery pack operation parameter range through the parameter conversion program.

[0046] Optionally, the generating module is specifically used for:

[0047] Acquire the operation process of the battery pack and the aging test process of the battery pack, and for each environment type, generate each simulation operation process of the battery pack based on the battery pack operation parameter range of the environment type and the operation process by a single variable method;

[0048] By using the battery pack model, the operation process of each simulation operation process is simulated to obtain the operation result of each simulation operation process, and the simulation operation process corresponding to the operation result without operation abnormality is used as the target simulation operation process;

[0049] Based on the battery group target operating parameters corresponding to each of the target simulation operating processes and the aging test process, a sub-battery group aging test strategy corresponding to each battery group target operating parameter is constructed, and the sub-battery group aging test strategies corresponding to all battery group target operating parameters are used as the battery group aging test strategies for the environment type.

[0050] Optionally, the control module is specifically used to:

[0051] Based on the environmental parameters of each of the environmental types, the instruction generation program of the battery pack aging cabinet is used to generate simulation environment instructions corresponding to each of the environmental types, and based on each sub-aging test strategy of each environmental type, the instruction generation program of the battery pack aging cabinet is used to generate test instructions for each of the sub-aging test strategies;

[0052] Sending the simulation environment instructions corresponding to each of the environment types and the test instructions of each sub-aging test strategy of each of the environment types to the battery aging cabinet respectively, and controlling the battery aging cabinet to generate a simulation environment of the environment type based on the simulation environment instructions;

[0053] Based on the test instructions of each sub-aging test strategy, control the battery pack aging cabinet to simulate the charge and discharge process of each sub-aging test strategy to obtain the sub-aging test result of each sub-aging test strategy;

[0054] The sub-aging test results of each sub-aging test strategy of each environment type are used as the aging test results of the environment type.

[0055] In a third aspect, the present application provides a computer device, wherein the computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of any one of the methods in the first aspect are implemented.

[0056] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.

[0057] In a fifth aspect, the present application provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.

[0058] The present invention provides a battery pack aging detection method and system, the method comprising: obtaining battery pack structure data of a battery pack, a battery pack charging and discharging mode of the battery pack, and operating environment data of the battery pack, and constructing a battery pack model of the battery pack based on the battery pack structure data and the battery pack charging and discharging mode; identifying sub-operating environment data of each environment type based on the operating environment data, and obtaining battery pack historical operating data of each environment type in a historical database; generating operating environment parameters of each environment type and a battery pack operating parameter range of each environment type through a parameter conversion program based on the sub-operating environment data of each environment type and the battery pack historical operating data of each environment type, and generating a battery pack aging test strategy for each environment type based on the battery pack operating parameter range of each environment type and the battery pack model; controlling a battery pack aging cabinet based on the environmental parameters of each environment type and the battery pack aging test strategy of each environment type, executing the charging and discharging process of the battery pack under the aging test strategy conditions, and obtaining aging test results of each environment type. This solution, by splitting and analyzing the actual operating environment data of the battery pack, obtains the environmental parameters of each environment type. Then, for different environments, this solution generates the battery pack operating parameter range of each environment type through the historical operating data of the battery pack in different environment types. After that, the terminal uses the constructed battery pack model to screen the target battery pack data in the individual battery operating parameter ranges to construct a battery pack aging test strategy. Therefore, when performing aging tests through the battery pack aging cabinet, the differences in the environments in which the battery pack is located and the differences in the battery pack operating data applicable to different environments are comprehensively considered to comprehensively generate an aging test strategy for the battery pack aging test. Then, the aging test is performed, and the aging test results of each environment type are obtained, which improves the comprehensiveness and accuracy of the aging test on the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0060] Figure 1 is a flow chart of a battery pack aging detection method provided by an embodiment of the present invention;

[0061] Figure 2 is a structural schematic diagram of a battery pack aging detection system provided by an embodiment of the present invention;

[0062] Figure 3An internal structure diagram of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0063] The battery pack aging detection method provided by the embodiment of the present invention is applied to the battery pack aging detection system. Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as those generally understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned figures are used to distinguish different objects, not to describe a specific order.

[0064] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0065] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0066] The battery pack aging detection method provided in the embodiment of the present application can be applied to the application environment of the battery pack aging detection system. Among them, the method can be applied to the terminal, can also be applied to the server, and can also be applied to the system including the terminal and the server, and is realized through the interaction between the terminal and the server. Among them, the terminal can be, but is not limited to, various computer devices, or battery pack detection equipment, etc. Among them, the terminal splits and analyzes the actual operating environment data of the battery pack to obtain the environmental parameters of each environment type, and then, for different environments, this solution generates the battery pack operating parameter range of each environment type through the historical operating data of the battery pack in different environment types, and then, the terminal uses the constructed battery pack model to select the target battery pack data in the sub-operating parameter range of each battery to construct the battery pack aging test strategy, so that when the aging test is performed through the battery pack aging cabinet, the different environments in which the battery pack is located and the different battery pack operating data applicable to different environments are comprehensively considered to comprehensively generate the aging test strategy of the battery pack aging test, and then the aging test is performed, and the aging test results of each environment type are obtained, which improves the comprehensiveness and accuracy of the aging test of the battery pack.

[0067] In one embodiment, Figure 1 As shown, a battery pack aging detection method is provided, and the method is applied to a terminal as an example for description, including the following steps:

[0068] Step S101 , obtaining battery pack structure data of a battery pack, a battery pack charge and discharge method of the battery pack, and operating environment data of the battery pack, and constructing a battery pack model of the battery pack based on the battery pack structure data and the battery pack charge and discharge method.

[0069] In this embodiment, the terminal obtains the battery pack model and battery pack specifications of the battery pack in response to the user's battery pack information upload operation. Then, the terminal queries the battery pack structure data that meets the battery pack model and battery pack specifications in the battery pack database. Among them, the battery pack structure data includes the three-dimensional structure data of each battery constituting the battery pack. Then, the terminal obtains the charging and discharging mode of the battery pack in the battery pack database, wherein the charging and discharging mode includes the charging mode and the discharging mode. Then, the terminal obtains the operating environment data of the battery pack by obtaining the environmental data of the daily operating environment of the battery pack, wherein the operating environment data includes the environmental data of each environment type, wherein the environment type includes but is not limited to the rainy day type, the high temperature environment type, the high pressure environment type, the low temperature environment type, the electromagnetic radiation environment type, and the humid environment type. Then, the terminal constructs a battery pack model of the battery pack based on the battery pack structure data and the battery pack charging and discharging mode. Among them, the battery pack model is a model that can simulate the operation process of the battery pack, and the model is a model constructed by a finite element simulation model construction program. The specific construction process will be described in detail later.

[0070] Step S102: identifying sub-operating environment data of each environment type based on the operating environment data, and acquiring historical operating data of the battery pack of each environment type in a historical database.

[0071] In this embodiment, the terminal splits and identifies the operating environment data, identifies the environmental data corresponding to each environment type, and uses the environmental data corresponding to each environment type as sub-operating environment data of each environment type. Then, the terminal obtains the historical operating data of the battery pack of each environment type from the historical operating database of the battery pack. The historical operating database is a database storing the operating log information of the battery pack during operation. The database stores the historical operating data of battery packs of different environment types.

[0072] Step S103, based on the sub-operating environment data of each environment type and the historical operating data of the battery pack of each environment type, generate the operating environment parameters of each environment type and the battery pack operating parameter range of each environment type through a parameter conversion program, and generate the battery pack aging test strategy for each environment type based on the battery pack operating parameter range of each environment type and the battery pack model.

[0073] In this embodiment, the terminal generates operating environment parameters of each environment type and operating parameter ranges of battery packs of each environment type through a parameter conversion program based on the sub-operating environment data of each environment type and the historical operating data of the battery packs of each environment type, and generates an aging test strategy for the battery packs of each environment type based on the operating parameter ranges of the battery packs of each environment type and the battery pack model. Among them, the parameter conversion program can be a program for converting the adopted numbers through the parameter conversion program of the COMSOL Multiphysics software. The program can convert the data of physical properties into parameters for simulation. Each battery pack aging test strategy includes multiple sub-aging test strategies, and each sub-aging test strategy is the battery pack test operation data obtained after adjusting and screening the battery packs of each environment type within the operating parameter range. The specific adjustment and screening process will be described in detail later.

[0074] Step S104, based on the environmental parameters of each environment type and the battery pack aging test strategy of each environment type, the battery pack aging cabinet is controlled to execute the charging and discharging process of the battery pack under the aging test strategy conditions to obtain the aging test results of each environment type.

[0075] In this embodiment, the terminal controls the battery pack aging cabinet based on the environmental parameters of each environment type and the battery pack aging test strategy of each environment type, executes the charging and discharging process of the battery pack under the aging test strategy conditions, and obtains the aging test results of each environment type. The specific test process will be described in detail later.

[0076] Based on the above scheme, the actual operating environment data of the battery pack is split and analyzed to obtain the environmental parameters of each environment type. Then, for different environments, this scheme generates the battery pack operating parameter range of each environment type through the historical operating data of the battery pack in different environment types. Then, the terminal uses the constructed battery pack model to screen the target battery pack data in the individual battery operating parameter ranges to construct a battery pack aging test strategy. Therefore, when the aging test is performed through the battery pack aging cabinet, the different environments in which the battery pack is located and the different battery pack operating data applicable to different environments are comprehensively considered to comprehensively generate the aging test strategy for the battery pack aging test. Then, the aging test is performed to obtain the aging test results of each environment type, thereby improving the comprehensiveness and accuracy of the aging test on the battery pack.

[0077] Optionally, a battery pack model of the battery pack is constructed based on the battery pack structure data and the charging and discharging method of the battery pack, including: based on the battery pack structure data, identifying the three-dimensional structure data of each battery of the battery pack and the structural connection relationship between the batteries, and constructing a three-dimensional structure model of each battery based on the three-dimensional structure data of each battery; based on the structural connection relationship between the batteries, performing structural splicing processing on the three-dimensional structure model of each battery to obtain the three-dimensional structure model of the battery pack, and based on the charging and discharging method of the battery pack, generating the charging and discharging parameters of the battery pack through a parameter conversion program; based on the charging and discharging parameters of the battery pack, performing model assignment processing on the three-dimensional structure model of the battery pack to obtain the battery pack model of the battery pack.

[0078] In this embodiment, the terminal identifies the three-dimensional structure data of each battery of the battery pack and the structural connection relationship between the batteries based on the battery pack structure data, and constructs a three-dimensional structure model of each battery based on the three-dimensional structure data of each battery. The three-dimensional structure model is constructed by performing three-dimensional modeling through any software program capable of implementing three-dimensional modeling.

[0079] Then, based on the structural connection relationship between the batteries, the terminal performs structural splicing processing on the three-dimensional structural models of each battery to obtain a three-dimensional structural model of the battery pack, and generates the charging and discharging parameters of the battery pack through a parameter conversion program based on the charging and discharging mode of the battery pack. Among them, the charging and discharging mode includes the charging and discharging frequency, the charging voltage value, the charging and discharging current value, and the charging and discharging power consumption range. The parameter conversion program is the parameter conversion program of the COMSOL Multiphysics software described above.

[0080] Finally, the terminal performs model assignment processing on the three-dimensional structural model of the battery pack based on the charging and discharging parameters of the battery pack to obtain a battery pack model of the battery pack. The assignment process can also be performed through COMSOL Multiphysics software.

[0081] Based on the above scheme, by constructing a three-dimensional structural model, analyzing the charging and discharging parameters of the battery pack and then assigning parameters, a battery pack model of the battery pack is obtained, which improves the accuracy and authenticity of the battery pack model of the battery pack.

[0082] Optionally, based on the operating environment data, sub-operating environment data of each environment type is identified, including: obtaining each environment identification information of the operating environment data, and querying the environment type corresponding to each environment identification information in the environment database; based on each environment identification information, querying the data content corresponding to each environment identification information in the operating environment data, and using the data content corresponding to each environment identification information as the sub-operating environment data of the environment type corresponding to each environment identification information.

[0083] In this embodiment, the terminal obtains each environment identification information of the operating environment data, and queries the environment type corresponding to each environment identification information in the environment database. Among them, each environment identification information is used to identify the environment type corresponding to each environment data. Among them, the environment identification information includes but is not limited to text identification, symbol identification, color identification, letter identification, etc. And the environment database stores the corresponding relationship between the environment identification information and the environment type. The terminal identifies the environment type corresponding to each environment identification information by querying the corresponding relationship.

[0084] Then, based on each environmental identification information, the terminal queries the data content corresponding to each environmental identification information in the operating environment data, and uses the data content corresponding to each environmental identification information as the sub-operating environment data of the environment type corresponding to each environmental identification information. Among them, each environmental data in the operating environment data contains the environmental identification information of the environment type to which the environmental data belongs. Then, the terminal identifies the environment type corresponding to each environmental data by querying the environmental identification information contained in each environmental data.

[0085] Based on the above solution, the environmental data of each environment type in the operating environment data is identified through environmental identification information, thereby improving the comprehensiveness and accuracy of the analysis of different environment types.

[0086] Optionally, based on the sub-operating environment data of each environment type and the historical operating data of the battery pack of each environment type, a parameter conversion program is used to generate operating environment parameters of each environment type and a range of battery pack operating parameters of each environment type, including: for each environment type, based on the sub-operating environment data of the environment type, identifying the influencing factor value of each environmental influencing factor of the environment type, and based on the influencing factor value of each environmental influencing factor, identifying the influencing parameter value of each environmental influencing factor through a parameter conversion program; using the influencing parameter values ​​of all environmental influencing factors as the operating environment parameters of the environment type, and identifying the operating data distribution information of the battery pack based on the historical operating data of the battery pack of the environment type; identifying the operating data range of the battery pack based on the operating data distribution information of the battery pack, and converting the operating data range into a battery pack operating parameter range through a parameter conversion program.

[0087] In this embodiment, for each environment type, the terminal identifies the influencing factor value of each environmental influencing factor of the environment type based on the sub-operating environment data of the environment type, and based on the influencing factor value of each environmental influencing factor, identifies the influencing parameter value of each environmental influencing factor through a parameter conversion program.

[0088] The sub-operation environment data of each environment type includes multiple environment data, and each environment data corresponds to an environment influencing factor, wherein the environment influencing factor includes but is not limited to temperature influencing factor, pressure influencing factor, electromagnetic interference influencing factor, humidity influencing factor, etc. Each operation data includes the environment attribute corresponding to the operation data, and the attribute value of the environment attribute. The terminal presets the corresponding relationship between each environment attribute and the environment influencing factor, and the ratio value between each attribute value and the influencing parameter value. The terminal identifies the environment attribute corresponding to each environment data, thereby identifying the environment influencing factor corresponding to the environment data, and calculates the influencing factor value of the environment data based on the ratio value between the attribute value of the environment attribute and the influencing parameter value of the environment influencing factor.

[0089] Then, the terminal uses the influencing parameter values ​​of all environmental influencing factors as the operating environment parameters of the environment type, and identifies the operating data distribution information of the battery pack based on the historical operating data of the battery pack of the environment type. The operating data distribution information is the distribution information corresponding to the operating data range of the historical operating data of each battery pack of the environment type, the horizontal axis of the distribution information is the operating data, and the vertical axis of the distribution information is the number of historical operating data.

[0090] Then, the terminal identifies the operating data range of the battery pack based on the operating data distribution information of the battery pack, and converts the operating data range into the operating parameter range of the battery pack through a parameter conversion program. The parameter conversion program described in this step is the same as the parameter conversion program described above, and this step is not described redundantly.

[0091] Based on the above scheme, by identifying the influencing parameter values ​​of the environmental influencing factors corresponding to each environmental data and the operating data distribution information of each operating data, the operating environment parameters of the environmental type and the battery pack operating parameter range are identified, thereby improving the accuracy and comprehensiveness of the identification.

[0092] Optionally, based on the battery pack operating parameter range of each environment type and the battery pack model, an aging test strategy for the battery pack of each environment type is generated, including: obtaining the operating process of the battery pack and the aging test process of the battery pack, and for each environment type, based on the battery pack operating parameter range of the environment type and the operating process, generating each simulation operating process of the battery pack through a single variable method; simulating the operating process of each simulation operating process through the battery pack model to obtain the operating result of each simulation operating process, and taking the simulation operating process corresponding to the operating result without operating abnormalities as the target simulation operating process; based on the battery pack target operating parameters and the aging test process corresponding to each target simulation operating process, constructing a sub-battery pack aging test strategy corresponding to each battery pack target operating parameter, and taking the sub-battery pack aging test strategies corresponding to all battery pack target operating parameters as the battery pack aging test strategy for the environment type.

[0093] In this embodiment, the terminal obtains the operation process of the battery pack and the aging test process of the battery pack, and for each environment type, based on the battery pack operation parameter range of the environment type and the operation process, generates various simulation operation processes of the battery pack through a single variable method. Among them, the simulation operation process is a simulation operation process that is performed according to the operation process by changing the operation data of each operation data type of the battery pack operation parameter range through a single variable method, thereby obtaining new operation data of each operation data type of the battery pack. Among them, the operation data type includes but is not limited to data such as voltage type, current type, discharge frequency type, and charging rate type.

[0094] Then, the terminal simulates the operation process of each simulation operation process through the battery pack model, obtains the operation results of each simulation operation process, and uses the simulation operation process corresponding to the operation result without operation abnormality as the target simulation operation process. Each operation result includes the operation state, operation current fluctuation range, operation voltage fluctuation range, etc. of the battery pack. If there is an abnormal operation state, the current fluctuation range is greater than the current fluctuation range threshold, or the voltage fluctuation range is greater than the voltage fluctuation range threshold, it is determined that the operation result has an operation abnormality. Otherwise, the operation result does not have an operation abnormality.

[0095] Finally, based on the battery pack target operating parameters corresponding to each target simulation operation process and the aging test process, the terminal constructs a sub-battery pack aging test strategy corresponding to the target operating parameters of each battery pack, and uses the sub-battery pack aging test strategies corresponding to all battery pack target operating parameters as the battery pack aging test strategy of the environment type. The construction process is to obtain the sub-aging test process of each sub-battery pack by using the target operating parameters of each battery pack as the input parameters of the aging test process.

[0096] Based on the above scheme, the operating parameters are screened through the battery pack model to obtain the target operating adoption numbers, and then the aging test strategies for each sub-battery pack are constructed, which improves the practicality, authenticity, and test integrity of the constructed battery pack aging test strategies.

[0097] Optionally, based on the environmental parameters of each environment type and the battery aging test strategy of each environment type, the battery aging cabinet is controlled to execute the charging and discharging process of the battery under the conditions of the aging test strategy to obtain the aging test results of each environment type, including: based on the environmental parameters of each environment type, generating simulated environment instructions corresponding to each environment type through the instruction generation program of the battery aging cabinet, and based on each sub-aging test strategy of each environment type, generating test instructions of each sub-aging test strategy through the instruction generation program of the battery aging cabinet; sending the simulated environment instructions corresponding to each environment type and the test instructions of each sub-aging test strategy of each environment type to the battery aging cabinet respectively, and controlling the battery aging cabinet to generate a simulated environment of the environment type based on the simulated environment instructions; based on the test instructions of each sub-aging test strategy, controlling the battery aging cabinet to simulate the charging and discharging process of each sub-aging test strategy to obtain the sub-aging test result of each sub-aging test strategy; using the sub-aging test results of each sub-aging test strategy of each environment type as the aging test result of the environment type.

[0098] In this embodiment, the terminal generates simulated environment instructions corresponding to each environment type through the instruction generation program of the battery pack aging cabinet based on the environmental parameters of each environment type, and generates test instructions of each sub-aging test strategy based on each sub-aging test strategy of each environment type through the instruction generation program of the battery pack aging cabinet. Among them, the battery pack aging cabinet includes the correspondence between the simulated environment instructions and the environmental parameters of each environment type, and the correspondence between each test process and input parameter and the test instruction. Then, the terminal identifies the simulated environment instructions corresponding to each environment type and the test instructions of each sub-aging test strategy of each environment type by querying the above correspondence.

[0099] Afterwards, the terminal sends the simulation environment instructions corresponding to each environment type and the test instructions of each sub-aging test strategy of each environment type to the battery aging cabinet, and controls the battery aging cabinet to generate a simulation environment of the environment type based on the simulation environment instructions. Then, based on the test instructions of each sub-aging test strategy, the terminal controls the battery aging cabinet to simulate the charging and discharging process of each sub-aging test strategy to obtain the sub-aging test results of each sub-aging test strategy.

[0100] Finally, the terminal uses the sub-aging test results of each sub-aging test strategy of each environment type as the aging test result of the environment type.

[0101] Based on the above scheme, by generating aging test strategies for various environmental types, the aging test process of the battery pack aging cabinet is controlled, thereby improving the accuracy and comprehensiveness of the aging test of the battery pack.

[0102] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0103] Based on the same inventive concept, the embodiment of the present application also provides a battery pack aging detection system for implementing the battery pack aging detection method involved above. The implementation scheme for solving the problem provided by the system is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more battery pack aging detection system embodiments provided below can refer to the limitations of the battery pack aging detection method above, and will not be repeated here.

[0104] Further references Figure 2 , as a response to the above Figure 1 To implement the method shown, the present application provides an embodiment of a battery pack aging detection system 200, the battery pack aging detection system comprising an acquisition module 210, an identification module 220, a generation module 230 and a control module 240, wherein:

[0105] An acquisition module 210, configured to acquire battery pack structure data of a battery pack, a battery pack charge and discharge mode of the battery pack, and operating environment data of the battery pack, and construct a battery pack model of the battery pack based on the battery pack structure data and the battery pack charge and discharge mode;

[0106] An identification module 220, for identifying sub-operating environment data of each environment type based on the operating environment data, and obtaining historical operating data of the battery pack of each environment type in a historical database;

[0107] A generating module 230, configured to generate operating environment parameters of each environment type and a battery pack operating parameter range of each environment type based on the sub-operating environment data of each environment type and the battery pack historical operating data of each environment type through a parameter conversion program, and generate a battery pack aging test strategy for each environment type based on the battery pack operating parameter range of each environment type and the battery pack model;

[0108] The control module 240 is used to control the battery pack aging cabinet based on the environmental parameters of each of the environmental types and the battery pack aging test strategy of each of the environmental types, execute the charging and discharging process of the battery pack under the aging test strategy conditions, and obtain the aging test results of each of the environmental types.

[0109] Optionally, the acquisition module 210 is specifically configured to:

[0110] Based on the battery pack structure data, identifying the three-dimensional structure data of each battery of the battery pack and the structural connection relationship between the batteries, and constructing a three-dimensional structure model of each battery based on the three-dimensional structure data of each battery;

[0111] Based on the structural connection relationship between the batteries, the three-dimensional structural models of the batteries are structurally spliced ​​to obtain the three-dimensional structural model of the battery pack, and based on the charging and discharging mode of the battery pack, the charging and discharging parameters of the battery pack are generated through a parameter conversion program;

[0112] Based on the charge and discharge parameters of the battery pack, a model assignment process is performed on the three-dimensional structure model of the battery pack to obtain a battery pack model of the battery pack.

[0113] Optionally, the identification module 220 is specifically configured to:

[0114] Obtaining each piece of environment identification information of the operating environment data, and querying the environment type corresponding to each piece of environment identification information in the environment database;

[0115] Based on each of the environment identification information, the data content corresponding to each environment identification information is queried in the operating environment data, and the data content corresponding to each environment identification information is used as sub-operating environment data of the environment type corresponding to each environment identification information.

[0116] Optionally, the generating module 230 is specifically configured to:

[0117] For each environment type, based on the sub-operating environment data of the environment type, identifying the influencing factor value of each environment influencing factor of the environment type, and based on the influencing factor value of each environment influencing factor, identifying the influencing parameter value of each environment influencing factor through a parameter conversion program;

[0118] Taking the influencing parameter values ​​of all environmental influencing factors as the operating environment parameters of the environment type, and identifying the operating data distribution information of the battery pack based on the historical operating data of the battery pack of the environment type;

[0119] Based on the operation data distribution information of the battery pack, the operation data range of the battery pack is identified, and the operation data range is converted into the battery pack operation parameter range through the parameter conversion program.

[0120] Optionally, the generating module 230 is specifically configured to:

[0121] Acquire the operation process of the battery pack and the aging test process of the battery pack, and for each environment type, generate each simulation operation process of the battery pack based on the battery pack operation parameter range of the environment type and the operation process by a single variable method;

[0122] By using the battery pack model, the operation process of each simulation operation process is simulated to obtain the operation result of each simulation operation process, and the simulation operation process corresponding to the operation result without operation abnormality is used as the target simulation operation process;

[0123] Based on the battery group target operating parameters corresponding to each of the target simulation operating processes and the aging test process, a sub-battery group aging test strategy corresponding to each battery group target operating parameter is constructed, and the sub-battery group aging test strategies corresponding to all battery group target operating parameters are used as the battery group aging test strategies for the environment type.

[0124] Optionally, the control module 240 is specifically configured to:

[0125] Based on the environmental parameters of each of the environmental types, the instruction generation program of the battery pack aging cabinet is used to generate simulation environment instructions corresponding to each of the environmental types, and based on each sub-aging test strategy of each environmental type, the instruction generation program of the battery pack aging cabinet is used to generate test instructions for each of the sub-aging test strategies;

[0126] Sending the simulation environment instructions corresponding to each of the environment types and the test instructions of each sub-aging test strategy of each of the environment types to the battery aging cabinet respectively, and controlling the battery aging cabinet to generate a simulation environment of the environment type based on the simulation environment instructions;

[0127] Based on the test instructions of each sub-aging test strategy, control the battery pack aging cabinet to simulate the charge and discharge process of each sub-aging test strategy to obtain the sub-aging test result of each sub-aging test strategy;

[0128] The sub-aging test results of each sub-aging test strategy of each environment type are used as the aging test results of the environment type.

[0129] Each module in the above battery pack aging detection system can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0130] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 3 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input system connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a battery pack aging detection method is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input system of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0131] Those skilled in the art will understand that Figure 3 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0132] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the steps of any one of the methods in the first aspect are implemented.

[0133] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.

[0134] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the steps of any one of the methods in the first aspect.

[0135] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0136] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0137] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0138] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery pack aging detection method, characterized in that: The method comprises: Acquire battery pack structure data of a battery pack, a battery pack charge and discharge mode of the battery pack, and operating environment data of the battery pack, and construct a battery pack model of the battery pack based on the battery pack structure data and the battery pack charge and discharge mode; Based on the operating environment data, identifying sub-operating environment data of each environment type, and obtaining historical operating data of the battery pack of each environment type in a historical database; Based on the sub-operating environment data of each environment type and the historical operating data of the battery pack of each environment type, the operating environment parameters of each environment type and the operating parameter range of the battery pack of each environment type are generated through a parameter conversion program, and based on the operating parameter range of the battery pack of each environment type and the battery pack model, an aging test strategy for the battery pack of each environment type is generated; Based on the environmental parameters of each of the environmental types and the battery pack aging test strategy of each of the environmental types, the battery pack aging cabinet is controlled to execute the charging and discharging process of the battery pack under the aging test strategy conditions to obtain the aging test results of each of the environmental types.

2. The method according to claim 1, characterized in that The step of constructing a battery pack model of the battery pack based on the battery pack structure data and the battery pack charge and discharge mode includes: Based on the battery pack structure data, identifying the three-dimensional structure data of each battery of the battery pack and the structural connection relationship between the batteries, and constructing a three-dimensional structure model of each battery based on the three-dimensional structure data of each battery; Based on the structural connection relationship between the batteries, the three-dimensional structural models of the batteries are structurally spliced ​​to obtain the three-dimensional structural model of the battery pack, and based on the charging and discharging mode of the battery pack, the charging and discharging parameters of the battery pack are generated through a parameter conversion program; Based on the charge and discharge parameters of the battery pack, a model assignment process is performed on the three-dimensional structure model of the battery pack to obtain a battery pack model of the battery pack.

3. The method according to claim 1, characterized in that The identifying, based on the operating environment data, sub-operating environment data of each environment type includes: Obtaining each piece of environment identification information of the operating environment data, and querying the environment type corresponding to each piece of environment identification information in the environment database; Based on each of the environment identification information, the data content corresponding to each environment identification information is queried in the operating environment data, and the data content corresponding to each environment identification information is used as sub-operating environment data of the environment type corresponding to each environment identification information.

4. The method according to claim 3, characterized in that The sub-operating environment data of each environment type and the historical operating data of the battery pack of each environment type are used to generate the operating environment parameters of each environment type and the operating parameter range of the battery pack of each environment type through a parameter conversion program, including: For each environment type, based on the sub-operating environment data of the environment type, identifying the influencing factor value of each environment influencing factor of the environment type, and based on the influencing factor value of each environment influencing factor, identifying the influencing parameter value of each environment influencing factor through a parameter conversion program; Taking the influencing parameter values ​​of all environmental influencing factors as the operating environment parameters of the environment type, and identifying the operating data distribution information of the battery pack based on the historical operating data of the battery pack of the environment type; Based on the operating data distribution information of the battery pack, the operating data range of the battery pack is identified, and the operating data range is converted into a battery pack operating parameter range through the parameter conversion program.

5. The method according to claim 4, characterized in that The step of generating a battery pack aging test strategy for each environment type based on the battery pack operating parameter range of each environment type and the battery pack model includes: Obtaining an operating process of a battery pack and an aging test process of the battery pack, and for each environment type, generating each simulation operating process of the battery pack based on an operating parameter range of the battery pack of the environment type and the operating process by a single variable method; By means of the battery pack model, the operation process of each simulation operation process is simulated to obtain the operation result of each simulation operation process, and the simulation operation process corresponding to the operation result without operation abnormality is used as the target simulation operation process; Based on the battery group target operating parameters corresponding to each of the target simulation operating processes and the aging test process, a sub-battery group aging test strategy corresponding to each battery group target operating parameter is constructed, and the sub-battery group aging test strategies corresponding to all battery group target operating parameters are used as the battery group aging test strategies for the environment type.

6. The method according to claim 5, characterized in that The environmental parameters based on each of the environmental types and the battery pack aging test strategy for each of the environmental types control the battery pack aging cabinet, execute the charging and discharging process of the battery pack under the aging test strategy conditions, and obtain the aging test results for each of the environmental types, including: Based on the environmental parameters of each of the environmental types, the instruction generation program of the battery pack aging cabinet is used to generate simulation environment instructions corresponding to each of the environmental types, and based on each sub-aging test strategy of each environmental type, the instruction generation program of the battery pack aging cabinet is used to generate test instructions for each of the sub-aging test strategies; Sending the simulation environment instructions corresponding to each of the environment types and the test instructions of each sub-aging test strategy of each of the environment types to the battery aging cabinet respectively, and controlling the battery aging cabinet to generate a simulation environment of the environment type based on the simulation environment instructions; Based on the test instructions of each sub-aging test strategy, control the battery pack aging cabinet to simulate the charge and discharge process of each sub-aging test strategy to obtain the sub-aging test result of each sub-aging test strategy; The sub-aging test results of each sub-aging test strategy of each environment type are used as the aging test results of the environment type.

7. A battery pack aging detection system, characterized in that: The system comprises: an acquisition module, used to acquire battery pack structure data of a battery pack, a battery pack charge and discharge mode of the battery pack, and operating environment data of the battery pack, and construct a battery pack model of the battery pack based on the battery pack structure data and the battery pack charge and discharge mode; An identification module, used to identify sub-operating environment data of each environment type based on the operating environment data, and obtain historical operating data of the battery pack of each environment type in a historical database; A generating module, configured to generate operating environment parameters of each environment type and operating parameter ranges of the battery packs of each environment type through a parameter conversion program based on the sub-operating environment data of each environment type and the historical operating data of the battery packs of each environment type, and to generate an aging test strategy for the battery packs of each environment type based on the operating parameter ranges of the battery packs of each environment type and the battery pack model; The control module is used to control the battery pack aging cabinet based on the environmental parameters of each environmental type and the battery pack aging test strategy of each environmental type, execute the charging and discharging process of the battery pack under the aging test strategy conditions, and obtain the aging test results of each environmental type.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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