The invention discloses an electric vehicle, a charger thereof, and a charger control method. The charger comprises: a pre-charging switch; a pre-charging resistor and a first pre-charging capacitor which are connected with the pre-charging switch; an alternating current switch; an alternating current module connected with the alternating current switch, the pre-charging resistor and the first pre-charging capacitor; a second pre-charging capacitor connected with the alternating current module in parallel; a high-voltage direct-current module connected with the second pre-charging capacitor inparallel and connected with a high-voltage battery pack; and a controller used for controlling the high-voltage direct-current module to pre-charge the second pre-charging capacitor, closing the pre-charging switch to charge the first pre-charging capacitor through a power grid after the voltage of the second pre-charging capacitor is greater than a first preset threshold value and less than a second preset threshold value, and closing the alternating-current switch after the first pre-charging capacitor finishes pre-charging. Therefore, the pre-charging time can be greatly shortened, so thata relatively large current is effectively prevented from being generated when a relay is attracted, the relay is prevented from being sintered, and the reliability of the system is improved.
本发明公开了一种电动汽车及其充电器和充电器控制方法,其中,该充电器包括:预充开关;与预充开关相连的预充电阻和第一预充电容;交流开关;与交流开关、预充电阻和第一预充电容相连的交流模块;与交流模块并联的第二预充电容;与第二预充电容并联的高压直流模块,高压直流模块与高压电池包连接;控制器,用于控制高压直流模块为第二预充电容进行预充电并在第二预充电容的电压大于第一预设阈值且小于第二预设阈值之后,闭合预充开关以通过电网对第一预充电容进行充电,以及在第一预充电容完成预充电之后,闭合交流开关。由此,能够大大降低预充电的时间,从而有效地避免吸合继电器时产生较大的电流,防止继电器发生烧结,提高了系统的可靠性。
Electric automobile, charger thereof and charger control method
电动汽车及其充电器和充电器控制方法
2020-06-09
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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