Simulation model for evaluating performance parameters of vehicle power battery

Abstract

The invention relates to a simulation model for evaluating the performance parameters of a vehicle power battery. The simulation model comprises a basic parameter input model, an algorithm model, an oscilloscope model and a failure warning model. The basic parameter input model is used for conducting input configuration according to the specific parameters of the vehicle power battery which is actually evaluated. The algorithm model is used for conducting real-time simulation calculation on the performance parameters of the battery. The oscilloscope model displays a two-dimension curve of dynamic change of each performance parameter in real time according to simulation data calculated by the algorithm model. The failure warning module conducts real-time warning when failure occurs on the performance parameters according to a set threshold value of each performance parameter. By the adoption of the simulation model for evaluating the performance parameters of the vehicle power battery, through model research of the lithium ion battery, a method for further improving the performance of the battery and optimizing the charge-discharge process can be provided, and the battery model can also be embedded into an electric vehicle model system to conduct simulation research on a finished vehicle.

Description

technical field [0001] The invention relates to the field of performance evaluation and testing of new energy vehicle power batteries, in particular to a simulation model for evaluating performance parameters of vehicle power batteries. Background technique [0002] As one of the power sources or the only power source for new energy vehicles, power batteries play an indispensable role. At present, the research on the performance of power batteries is not deep enough in the world. Especially in China, power batteries of the same specification produced by different battery manufacturers appear to be the same on the surface, but in actual testing or application, their performance is ever-changing. difference. [0003] The electric vehicle power battery model mainly describes the mathematical relationship between various influencing factors and battery operating characteristics. The mathematical models of batteries and battery packs directly affect the performance analysis, pa...

AI Technical Summary

Problems solved by technology

Through the research on the heat generation and heat transfer process of the battery, it is possible to establish a one-dimensional model, a two-dimensional model and a three-dimensional model. Although it is theoretically feasible, some parameters inside the battery, as well as the internal electric field and thermal field of the battery , chemical reactions are difficult to measure accurately, which will lead to low precision of the whole model

The operating current, voltage, and power of electric vehicles are subject to large changes in operating conditions and are unpredictable. Therefore, the current battery model is difficult to reflect the various operating states of the battery, which limits its application.

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