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Power battery temperature prediction system and method

A prediction system and power battery technology, applied in battery/fuel cell control devices, measuring electricity, electric vehicles, etc.

Active Publication Date: 2019-07-09
CHINA FIRST AUTOMOBILE
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Problems solved by technology

[0005] The present invention provides a power battery temperature prediction system capable of improving battery temperature estimation accuracy and thermal management pre-control, etc., which solves the above-mentioned deficiencies in the existing power battery temperature prediction system and temperature prediction method

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  • Power battery temperature prediction system and method

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Embodiment Construction

[0045] The purpose of the present invention is to provide a power battery temperature prediction system and method, which are used to predict the temperature change caused by the change of thermal energy and electric energy during the charging and discharging process of the power battery module.

[0046] A power battery temperature prediction system, the system includes an acquisition module and a temperature prediction module connected to it in communication, the sampling chip in the acquisition module collects the maximum temperature T of the battery collected by a voltage detection circuit, a current sensor and a temperature sensor max , battery minimum temperature T min and the current value I are input to the temperature prediction module; the operation chip of the temperature prediction module calculates the internal resistance R and the reaction heat coefficient k according to the real-time temperature and SOC, and uses it as the input of the temperature prediction equat...

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Abstract

The invention belongs to the field of power batteries, and particularly relates to a power battery temperature prediction system and method. The power battery temperature prediction system includes anacquisition module and a temperature prediction module. In the charging and discharging processes, a key temperature parameter is determined according to multi-objective functions such as the flux ofa lithium ion intercalation reaction, the attenuation amount of the battery capacity and the low-temperature heating charging time, and temperature prediction is performed. According to the method, the accuracy of battery temperature prediction is improved, and the adverse effect of the temperature on battery performance is reduced.

Description

technical field [0001] The invention belongs to the field of power batteries, and in particular relates to a power battery temperature prediction system and method. Background technique [0002] The performance of the power battery of an electric vehicle is greatly affected by temperature. The battery parameters, voltage output and discharge efficiency are different at different temperatures, which makes the maximum allowable power and remaining available energy of the battery different at different temperatures, which affects the use of real vehicles. The power output and driving range of the vehicle in the middle. The heat generated during charging and discharging of the battery during current and future use will also lead to changes in temperature, resulting in changes in battery performance. Therefore, in order to improve the prediction accuracy of the performance of the power battery, it is necessary to predict the temperature change of the battery in real time, improv...

Claims

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Application Information

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IPC IPC(8): B60L58/24G01R31/382
CPCY02T10/70
Inventor 荣常如孙焕丽王书洋王雯婷许立超刘轶鑫赵子亮姜涛孟祥宇任毅窦智
Owner CHINA FIRST AUTOMOBILE
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