The invention provides a vehicle-mounted charger and a high-voltage direct-current side active discharging method thereof.The high-voltage direct-current side active discharging method comprises the steps that after connection between the high-voltage direct-current side of the vehicle-mounted charger and a high-voltage power battery is disconnected, the voltage of the high-voltage direct-current side is obtained; when the voltage of the high-voltage direct current side is larger than a preset safety threshold value, a circuit in the vehicle-mounted charger is controlled to work, and electric energy on a first capacitor between the positive electrode and the negative electrode of the high-voltage direct current side is discharged to other sides of the vehicle-mounted charger until the voltage of the high-voltage direct current side is smaller than or equal to the preset safety threshold value; furthermore, by means of a circuit in the vehicle-mounted charger, an additional discharging branch in the prior art is replaced, discharging of the capacitor connected between the positive electrode and the negative electrode of the high-voltage direct-current side is achieved, and increase of the size and the cost and reduction of the power density caused by the fact that the discharging branch is added are avoided.
本申请提供一种车载充电机及其高压直流侧主动放电方法,该高压直流侧主动放电方法,在车载充电机的高压直流侧与高压动力电池之间的连接断开后,获取高压直流侧的电压;并在该高压直流侧的电压大于预设安全阈值时,控制车载充电机内的电路工作,将高压直流侧正负极之间第一电容上的电能泄放至车载充电机的其它侧,直至该高压直流侧的电压小于等于预设安全阈值;进而,借助于车载充电机内的电路,代替现有技术中额外的放电支路,实现了对于该高压直流侧正负极之间所接电容的放电,避免了增加放电支路所带来的体积和成本的增加以及功率密度的减小。
Vehicle-mounted charger and high-voltage direct-current side active discharging method thereof
一种车载充电机及其高压直流侧主动放电方法
2023-10-27
Patent
Electronic Resource
Chinese
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