The invention discloses a power battery system and an electric vehicle. The power battery system comprises a vehicle control unit and at least two independent working battery modules; the working battery modules are connected in series between a positive port of the vehicle control unit and a negative port of the vehicle control unit, and the working battery modules are detachably fixed on the electric vehicle; and each working battery module comprises a first battery cell group, a first BMS and a first switch unit, and the first BMS controls the first switch unit to act when monitoring that the first battery cell group has a fault, so that the working battery module is electrically disconnected from the power battery system. The electrical connection between the faulted working battery module and the power battery system can be disconnected, and the faulted working battery module is separated from the chassis of the electric vehicle, so the thermal runaway of the faulted working battery module is prevented from damaging people and vehicles due to other working battery modules, only the faulted working battery module needs to be replaced in subsequent maintenance, other working battery modules and the whole vehicle do not need to be discarded, and the maintenance cost is saved.
本发明公开一种动力电池系统及电动汽车,动力电池系统包括整车控制器和至少两个分立的工作电池模组;各工作电池模组串联连接在整车控制器的正极端口和整车控制器的负极端口之间,工作电池模组可拆卸固定在电动汽车上;工作电池模组包括第一电芯组、第一BMS和第一开关单元,第一BMS在监测到第一电芯组出现故障时,控制第一开关单元动作,以使工作电池模组与动力电池系统断开电连接。本发明能够断开故障的工作电池模组与动力电池系统的电连接,并使其脱离电动汽车底盘,避免该工作电池模组的热失控波及其他工作电池模组造成人、车伤害,在后续的维修中,只需要替换故障的工作电池模组即可,无需抛弃其他工作电池模组和整车,节省了维修成本。
Power battery system and electric vehicle
一种动力电池系统及电动汽车
2020-07-03
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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