Temperature monitoring processing method of battery management system based on function safety

Abstract

The invention discloses a temperature monitoring processing method of a battery management system based on function safety. The temperature monitoring processing method comprises the steps that the temperatures of all temperature sampling points of a battery pack are collected to set a temperature threshold value, if the temperature values collected in the temperature sampling points exceed the range of the temperature threshold value, it is judged that the function of the temperature sampling points is abnormal, and if the number of the abnormal temperature sampling points exceeds a set percentage, an alarm signal is output to a VCU, otherwise, the data of the temperature sampling points with the abnormal function are deleted; the variation trend of the temperatures along with time is monitored to judge whether the data of temperature sampling points with the normal function are failed or not, and the temperature data of the temperature sampling points with the effective temperature data are judged and regulated to be within the set working temperature range; the maximum value and the minimum value are found out through a bubbling method, and the difference of the maximum value and the minimum value is regulated to be smaller than or equal to 5 DEG C, so that the thermal balance requirement of the battery pack is met, and the normal signal of the temperature of the battery pack is output to the VCU. According to the temperature monitoring processing method, the problem that at present, the temperature of power batteries is lack of functional diagnosis and monitor based onfunction safety is solved.

Description

technical field [0001] The invention relates to a state monitoring and management of a battery of a new energy vehicle, in particular to a temperature monitoring and processing method of a battery management system based on functional safety. Background technique [0002] With the rapid development of new energy vehicles, the application of battery packs in new energy vehicles is gradually increasing. The battery management system is responsible for real-time monitoring and management of battery pack voltage, current and temperature. Temperature is one of the important parameters that reflect the characteristics of the battery pack. The battery pack needs to work in an ideal temperature range to maintain relatively stable performance and output a stable voltage value. If it exceeds the ideal operating temperature range, the output voltage of the battery pack will drop, the performance will be unstable, and even cause battery leakage or fire in serious cases, threatening th...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a battery management system temperature monitoring and processing method based on functional safety, which mainly solves the problem of lack of functional safety-based functional diagnosis and monitoring of the temperature of the battery pack

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