CN-121978530-A - Battery pack module development method and related device aiming at simulation requirements of electric automobile

CN121978530ACN 121978530 ACN121978530 ACN 121978530ACN-121978530-A

Abstract

The application relates to the technical field of data processing, and provides a battery pack module development method and a related device aiming at the simulation requirement of an electric automobile, wherein the method comprises the steps of obtaining the end power of a virtual battery pack module, and obtaining an ambient temperature value and a state of charge; the method comprises the steps of determining the open-circuit voltage and the internal resistance value of a virtual battery pack module according to the ambient temperature value and the state of charge, determining the current state of charge of the virtual battery pack module according to the end power, the open-circuit voltage, the internal resistance value, the current of the last step, the battery capacity of the virtual battery pack module and the initial state of charge, determining the current state of charge of the virtual battery pack module according to the end voltage of the virtual battery pack module, the ambient temperature value, the state of charge and the like, and improving the efficiency accuracy when determining the current state of charge without verification and the like based on a physical model.

Inventors

LIU QI
LIU ZHEN
LIU JIANXIONG
FU JIANQIN

Assignees

重庆麓泱时代科技有限公司

Dates

Publication Date: 20260505
Application Date: 20251219

Claims (10)

1. A battery pack module development method for electric vehicle simulation requirements, the method comprising: acquiring the terminal power of the virtual battery pack module and acquiring an ambient temperature value and a state of charge; Determining an open-circuit voltage and an internal resistance value of the virtual battery pack module according to the ambient temperature value and the state of charge; and determining the current charge state of the virtual battery pack module according to the end power, the open circuit voltage, the internal resistance value, the current of the last step, the battery capacity of the virtual battery pack module and the initial charge state.
2. The method for developing a battery pack module according to claim 1, wherein determining the current state of charge of the virtual battery pack module according to the terminal power, the open circuit voltage, the internal resistance value, the battery capacity of the virtual battery pack module, and the initial state of charge comprises: Determining the current of the virtual battery pack module according to the end power, the open circuit voltage, the internal resistance value and the current of the last step; and determining the current charge state of the virtual battery pack module according to the current, the battery capacity of the virtual battery pack module and the initial charge state.
3. The method for developing a battery pack module for electric vehicle simulation requirements according to claim 2, wherein the determining the current of the virtual battery pack module according to the terminal power, the open circuit voltage, the internal resistance value, and the current of the previous step length comprises: Determining the current of the virtual battery pack module according to the end power, the open circuit voltage, the internal resistance value and the current of the last step by a method shown in the following formula: , Wherein, the As a current flow is present, For the value of the internal resistance, For open circuit voltage, P_tem is battery terminal power and I 0 is the current of the last step.
4. The battery pack module development method for electric vehicle simulation requirements according to any one of claims 1 to 3, wherein the obtaining the terminal power of the virtual battery pack module includes: Acquiring the required power of a motor and the consumption power of accessories of a vehicle; and determining the sum of the required power and the accessory consumption power as the end power of the virtual battery pack module.
5. The battery pack module development method for electric vehicle simulation requirements of claim 3, further comprising: Determining the terminal voltage of the virtual battery pack module by a method shown in the following formula: , Wherein, the The terminal voltage, U is the open circuit voltage, I is the present current, and r is the internal resistance.
6. The battery pack module development method for electric vehicle simulation requirements of claim 4, further comprising: The cumulative electricity consumption of the virtual battery pack module is determined by a method shown in the following formula: , Wherein, the To accumulate power consumption, P_tem is battery side power.
7. A battery pack module development device for electric vehicle simulation requirements, the device comprising: the acquisition unit is used for acquiring the end power of the virtual battery pack module and acquiring an ambient temperature value and a state of charge; a first determining unit for determining an open-circuit voltage and an internal resistance value of the virtual battery pack module according to the ambient temperature value and the state of charge; And the second determining unit is used for determining the current charge state of the virtual battery pack module according to the end power, the open circuit voltage, the internal resistance value, the current of the last step, the battery capacity of the virtual battery pack module and the initial charge state.
8. The battery pack module development method for electric vehicle simulation requirements of claim 7, wherein the second determining unit is specifically configured to: Determining the current of the virtual battery pack module according to the end power, the open circuit voltage, the internal resistance value and the current of the last step; and determining the current charge state of the virtual battery pack module according to the current, the battery capacity of the virtual battery pack module and the initial charge state.
9. A terminal comprising a processor, an input device, an output device, and a memory, the processor, the input device, the output device, and the memory being interconnected, wherein the memory is configured to store a computer program comprising program instructions, the processor being configured to invoke the program instructions to perform the battery pack module development method for electric vehicle simulation requirements of any of claims 1-6.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program comprising program instructions that when executed by a processor cause the processor to perform the battery pack module development method for electric vehicle simulation requirements according to any one of claims 1-6.

Description

Battery pack module development method and related device aiming at simulation requirements of electric automobile Technical Field The application relates to the technical field of data processing, in particular to a battery pack module development method and a related device aiming at the simulation requirement of an electric automobile. Background At present, a physical model-based method is mainly adopted for the development of the virtual battery pack module. According to the method, by establishing a physical mathematical model of the battery, factors such as chemical reaction, thermal coupling effect, electrochemical characteristics and the like in the battery are considered, so that performance of the battery under different working conditions is predicted. While complex battery models can provide more detailed and accurate battery dynamic response characteristics in electric vehicle performance simulations, they also come with a number of challenges and shortcomings. These models typically have high computational complexity, require significant computational resources and time to simulate, and can face parameterization difficulties and model verification challenges. Disclosure of Invention The embodiment of the application provides a virtual battery pack module development method and a related device for simulating requirements of an electric automobile, which can determine the current state of charge of the virtual battery pack module according to terminal voltage, an ambient temperature value, the state of charge and the like of the virtual battery pack module, do not need to verify based on a physical model and the like, and improve efficiency accuracy in determining the current state of charge. A first aspect of an embodiment of the present application provides a method for developing a battery pack module for electric vehicle simulation requirements, where the method includes: acquiring the terminal power of the virtual battery pack module and acquiring an ambient temperature value and a state of charge; Determining an open-circuit voltage and an internal resistance value of the virtual battery pack module according to the ambient temperature value and the state of charge; and determining the current charge state of the virtual battery pack module according to the end power, the open circuit voltage, the internal resistance value, the current of the last step, the battery capacity of the virtual battery pack module and the initial charge state. In this example, by acquiring the terminal power of the virtual battery pack module, and acquiring the ambient temperature value and the state of charge, the open-circuit voltage and the internal resistance value of the virtual battery pack module are determined according to the ambient temperature value and the state of charge, and the current state of charge of the virtual battery pack module is determined according to the terminal power, the open-circuit voltage, the internal resistance value, the current of the last step, the battery capacity of the virtual battery pack module and the initial state of charge, so that the current state of charge of the virtual battery pack module can be determined according to the terminal voltage of the virtual battery pack module, the ambient temperature value, the state of charge and the like, verification based on a physical model is not required, and efficiency accuracy in determining the current state of charge is improved. In one possible implementation manner, the determining the current state of charge of the virtual battery pack module according to the end power, the open circuit voltage, the internal resistance value, the battery capacity of the virtual battery pack module, and the initial state of charge includes: Determining the current of the virtual battery pack module according to the end power, the open circuit voltage, the internal resistance value and the current of the last step; and determining the current charge state of the virtual battery pack module according to the current, the battery capacity of the virtual battery pack module and the initial charge state. In one possible implementation manner, the determining the current of the virtual battery pack module according to the end power, the open circuit voltage, the internal resistance value and the current of the previous step length includes: Determining the current of the virtual battery pack module according to the end power, the open circuit voltage, the internal resistance value and the current of the last step by a method shown in the following formula: , Wherein, the As a current flow is present,For the value of the internal resistance,For open circuit voltage, P_tem is battery terminal power and I 0 is the current of the last step. In one possible implementation manner, the obtaining the terminal power of the virtual battery pack module includes: Acquiring the required power of a motor and the consumption power of accessories of a ve