The invention discloses an independent diagnosis device and method for a high-voltage contactor of a power battery system. The device comprises a first current detection module, a second current detection module, a power supply module, a processing module and a communication module, the first current detection module is used for acquiring a first current between the second ends of the main positive contactor and the pre-charging contactor and the negative electrode of the battery pack; the second current detection module is used for acquiring a second current between the power supply module and the second end of the main negative contactor; the processing module is used for obtaining diagnosis results of the main positive contactor, the pre-charging contactor and the main negative contactor and sending the diagnosis results to the battery management system through the communication module. According to the device and method, the problem that the measurement precision is influenced by external voltage interference is solved, and independent diagnosis of the main positive contactor, the pre-charging contactor and the main negative contactor is realized, so that the diagnosis accuracy and reliability of the high-voltage contactor of the electric vehicle are improved.
本发明公开了一种动力电池系统的高压接触器独立诊断装置及方法。该装置包括第一电流检测模块、第二电流检测模块、电源模块、处理模块及通信模块;第一电流检测模块用于获取主正接触器和预充接触器的第二端和电池包的负极之间的第一电流;第二电流检测模块用于获取电源模块和主负接触器的第二端之间的第二电流;处理模块用于获取主正接触器、预充接触器和主负接触器诊断结果、并将诊断结果通过通信模块发送至电池管理系统。本发明不仅解决了外接电压干扰影响测量精度的问题,同时还实现了主正接触器和预充接触器与主负接触器的独立诊断,从而提高了电动车高压接触器诊断的准确性和可靠性。
Independent diagnosis device and method for high-voltage contactor of power battery system
一种动力电池系统的高压接触器独立诊断装置及方法
2021-07-09
Patent
Elektronische Ressource
Chinesisch
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