The invention provides a multi-branch battery system charging method and a vehicle, and belongs to the technical field of vehicle charging. The method comprises the following steps: calculating branch SOC of each battery branch and single SOC of an abnormal single battery cell corresponding to the highest voltage in each battery branch in real time; and judging the difference between the branch SOC of each battery branch and the difference between the single SOC of the abnormal single battery cell and the branch SOC of the battery where the abnormal single battery cell is located. After charging for a period of time, if the branch SOC difference delta SOC branch-branch between the battery branches is higher than the difference delta SOC monomer-branch between the monomer SOC of the abnormal monomer cell and the branch SOC of the battery branches, the BMS adopts a stepped charging current reducing method, so that the SOC difference between the battery branches is reduced; therefore, the single overvoltage phenomenon caused by the fact that the abnormal single battery cell is charged after the charging stage is finished is avoided.
本发明提供了一种多支路电池系统充电方法及车辆,属于车辆充电技术领域。通过实时计算各电池支路的支路SOC以及各个电池支路中对应最高电压的异常单体电芯的单体SOC;判断各电池支路的支路SOC之间的差异、异常单体电芯的单体SOC和其所在电池的支路SOC之间的差异。在充电一段时间后,若电池支路之间的支路SOC差异ΔSOC支路‑支路高于异常单体电芯的单体SOC与电池支路的支路SOC之间的差异ΔSOC单体‑支路时,BMS采用阶梯式减小充电电流的方法,使各电池支路之间的SOC差异减小,从而避免异常单体电芯在充电阶段结束后被充电导致的单体过压现象。
Multi-branch battery system charging method and vehicle
一种多支路电池系统充电方法及车辆
17.03.2023
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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