The invention provides a diagnosis circuit and method for a high-voltage relay in a vehicle battery pack, a positive electrode and a negative electrode of a battery in the vehicle battery pack are respectively connected with external equipment of the battery pack through a main positive relay and a main negative relay, and the diagnosis circuit is characterized in that one end, close to the negative electrode of the battery, of the main negative relay is grounded to form a grounding reference point; two ends of the main positive relay and one end of the main negative relay far away from the negative electrode of the battery are respectively connected with a grounding reference point through sampling resistors; one end, close to the positive electrode of the battery, of the main positive relay is connected with one end, away from the negative electrode of the battery, of the main negative relay through a circuit provided with a first cable-stayed resistor, and the resistance value of the first cable-stayed resistor is megohm order of magnitude.
本发明提供了一种车辆电池包中高压继电器的诊断电路及方法,在车辆电池包中电池的正极和负极分别通过主正继电器和主负继电器与电池包外部设备相连接,诊断电路包括:主负继电器靠近电池负极的一端接地以构成接地参考点,主正继电器的两端以及主负继电器远离电池负极的一端分别通过采样电阻与接地参考点相连接;将主正继电器靠近电池正极的一端与主负继电器远离电池负极的一端之间通过设有第一斜拉电阻的电路相连接,第一斜拉电阻的阻值为兆欧姆数量级。
Diagnostic circuit and method for high-voltage relay in vehicle battery pack
一种车辆电池包中高压继电器的诊断电路及方法
2023-05-23
Patent
Electronic Resource
Chinese
DIAGNOSIS CIRCUIT FOR HIGH-VOLTAGE RELAY IN VEHICLE BATTERY PACK, AND METHOD
European Patent Office | 2024
|Battery diagnostic device, battery diagnostic method, battery pack, and vehicle
European Patent Office | 2022
|Battery diagnostic device, battery diagnostic method, battery pack, and electric vehicle
European Patent Office | 2023
|Relay circuit of power battery pack and relay fault identification method
European Patent Office | 2023
|