The invention discloses a control system for preventing an adhesion fault of a high-voltage relay in an electric vehicle, and the system outputs a low-voltage control signal to a second end of a coil in the high-voltage relay through a battery pack management module, so as to enable the coil in the high-voltage relay to be powered on, and attract the high-voltage relay. And when the power supply voltage of the coil in the high-voltage relay is detected to be smaller than a first preset voltage value, the standby power supply module is controlled to work so as to supply power to the coil in the high-voltage relay in a compensation manner. Voltage compensation is carried out on a coil in the high-voltage relay in time, adhesion of the high-voltage relay during on-load high-voltage cut-off is prevented, and the safety of a vehicle is improved.
本发明公开了一种电动车辆中防止高压继电器发生粘连故障的控制系统,通过电池包管理模块输出低压控制信号至高压继电器中的线圈的第二端,以使高压继电器中的线圈上电,吸合高压继电器,并在检测到高压继电器中线圈的供电电压小于第一预设电压值时控制备用供电模块进行工作,以对高压继电器中的线圈补偿供电,从而在当高压继电器中线圈两端电压较低可能发生粘连故障时,及时对高压继电器中的线圈进行电压补偿,防止高压继电器在带载切断高压时发生粘连,提高车辆的安全性。
Control system for preventing adhesion failure of high-voltage relay in electric vehicle
电动车辆中防止高压继电器发生粘连故障的控制系统
2022-07-01
Patent
Electronic Resource
Chinese
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