The invention relates to the technical field of new energy automobiles, and discloses a power battery thermal runaway monitoring and alarming method, which comprises the following steps: acquiring a battery pressure value in real time, and entering a mode 1 when in a low power consumption mode; entering a mode 2 when in a high power consumption mode; mode 1, the whole vehicle and the BMS system are in a dormant state, a pressure slope value is calculated through a pressure sensor, when the pressure slope value is larger than or equal to a threshold value and continuous N cycles reach a set condition, the BMS is awakened, fault information and battery pack information are received and judged, and when thermal runaway is detected, reporting is carried out; and mode 2, the pressure value is only transmitted to the BMS, the BMS calculates the pressure slope value of the BMS, and when the pressure slope value is larger than or equal to a threshold value and N continuous periods reach set conditions respectively, the BMS receives and judges the fault information and the battery pack information and then reports the thermal runaway fault. According to the method, the thermal runaway signal can be accurately reported on the premise of not adding extra equipment, and the thermal runaway alarm time can be greatly shortened on the premise that false alarm is avoided.
本发明涉及新能源汽车技术领域,公开了一种动力电池热失控监测报警方法,包括实时获取电池压力值,当处于低功耗模式时进入方式1;当处于高功耗模式时进入方式2;方式1,将整车及BMS系统处于休眠状态,通过压力传感器计算压力斜率值,当压力斜率值≥阈值,且持续N个周期达到设定条件时,唤醒BMS,接收并判断故障信息和电池包信息,当检测到热失控时进行上报;方式2,将压力值仅传输至BMS,BMS计算其压力斜率值,当压力斜率值≥阈值,且持续N个周期分别达到设定条件时,BMS接收并判断故障信息和电池包信息后上报热失控故障。本发明在不增加额外设备的前提下,能够准确报出热失控信号,在满足不误报的前提下,能极大减少热失控报警时间。
Power battery thermal runaway monitoring and alarming method
一种动力电池热失控监测报警方法
2025-05-13
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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