The invention provides a charging method and device of a power battery, a vehicle, equipment and a program product, and the method comprises the steps: detecting the terminal voltage of the power battery in response to the connection of an external power supply and a charging interface, and controlling a boost switch to be switched off if the terminal voltage is greater than the output voltage of the external power supply; controlling the step-up and step-down circuit to work in a step-down mode so as to charge the pre-charge capacitor until the voltage of the pre-charge capacitor reaches a first preset voltage; then controlling the buck-boost circuit to work in a direct connection mode so as to continuously charge the pre-charge capacitor until the voltage of the pre-charge capacitor reaches a second preset voltage; the second preset voltage is closer to the terminal voltage of the power battery than the first preset voltage; and finally, the boost switch is controlled to be closed, and the buck-boost circuit is controlled to work in a boost mode, so that the output voltage of the external power supply is boosted to charge the power battery. According to the embodiment of the invention, the voltage difference between the pre-charging capacitor and the power battery can be reduced, so that the current impact damage to the pre-charging capacitor is reduced.
本公开提供了一种动力电池的充电方法、装置、车辆、设备以及程序产品,该方法首先响应于外部电源与充电接口连接,检测动力电池的端电压,若端电压大于外部电源的输出电压,控制升压开关断开,并控制升降压电路工作于降压模式以对预充电容进行充电,直至预充电容的电压达到第一预设电压;然后控制升降压电路工作于直通模式以对预充电容继续充电,直至预充电容的电压达到第二预设电压;第二预设电压比第一预设电压更靠近动力电池的端电压;最后控制升压开关闭合,并控制升降压电路工作于升压模式,以将外部电源的输出电压升压后为动力电池进行充电。本公开实施例,可以降低预充电容与动力电池之间的电压差,从而减少对预充电容的电流冲击损伤。
Charging method and device of power battery, vehicle, equipment and program product
动力电池的充电方法、装置、车辆、设备以及程序产品
27.08.2024
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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