Preheating charging control method and new energy logistics vehicle

You are here: Homepage > Search

Preheating charging control method and new energy logistics vehicle

Free access

CHEN YAO / YAN YIFEI / SU SONGLIN / WU ZHAOLIANG / ZHU YONGCHANG

The invention discloses a preheating charging control method and a new energy logistics vehicle, and the method comprises the steps: a low-temperature charging preheating stage of a whole vehicle: controlling a main positive relay and a main negative relay to be disconnected through a battery management system after power-on; in the battery charging and heating stage, after battery preheating is completed, high-voltage pre-charging is carried out firstly, then the main positive relay is closed, and the battery is charged and heated at the same time. According to the preheating charging control method and the new energy logistics vehicle, under the condition that the power-on time sequence in the charging stage is not affected, during low-temperature charging preheating, the BMS controls the main positive relay and the main negative relay to be switched off, current is prevented from flowing into the battery in the low-temperature charging stage, charging preheating is conducted when the Tmin battery is smaller than or equal to 0 DEG C, and the charging time is shortened. The problem of dendritic lithium precipitation of the lithium iron phosphate battery caused by current flowing through the battery is reduced, and the service life of the battery is prolonged.

本发明公开了一种预热充电控制方法及新能源物流车，包括：整车低温充电预热阶段，上电后，通过电池管理系统控制主正继电器和主负继电器断开；电池边充电边加热阶段，完成电池预热后，先进行高压预充，再闭合主正继电器，进行电池边充电边加热。本发明的预热充电控制方法及新能源物流车，在不影响充电阶段上电时序的情况下，在低温充电预热时，BMS控制主正、负继电器断开，杜绝低温充电阶段电流流入电池，在Tmin电池≤0℃时进行充电预热，降低电流流过电池造成磷酸铁锂电池产生枝晶析锂问题，延长电池使用寿命。