The invention provides a low-temperature preheating device for a vehicle power battery and a control method of the low-temperature preheating device for the vehicle power battery. The low-temperaturepreheating device for the vehicle power battery comprises a power battery pack, wherein the power battery pack is connected with a direct-current bus capacitor through a first contactor; the power battery pack is connected with a one-phase stator winding of a first driving motor through a second contactor; at least one temperature sensor is arranged on a temperature sampling point of the power battery pack; the direct-current side of a motor driving inverter is connected with the bus capacitor, and the alternating-current output side is connected with a driving motor stator winding; a currentsensor is arranged at the alternating-current output end of the motor driving inverter; and a battery preheating control system is in control connection with the motor driving inverter, the temperature sensor, the current sensor and the contactors. The preheating control system switches a motor driving mode and a battery preheating mode by controlling the on-off state of the first contactor and the second contactor. The additional hardware equipment and cost investment is not needed, and self energy of the battery can be used for heating.
本发明提供了一种车用动力电池低温预热装置及其控制方法,包括:动力电池组;动力电池组与直流母线电容通过第一接触器连接;动力电池组与驱动电机一相定子绕组通过第二接触器连接;至少一个温度传感器,设于动力电池组的温度采样点上;电机驱动逆变器直流侧与母线电容连接,交流输出侧与驱动电机定子绕组连接;电流传感器设于电机驱动逆变器交流输出端;与电机驱动逆变器、温度传感器、电流传感器及接触器控制连接的电池预热控制系统。预热控制系统依靠控制第一接触器和第二接触器的通断切换电机驱动及电池预热模式,本发明无需增加额外的硬件设备和成本投入,能够使用电池自身能量进行加热。
Low-temperature preheating device for vehicle power battery and control method of low-temperature preheating device for vehicle power battery
车用动力电池低温预热装置及其控制方法
2020-12-15
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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