A battery system includes: a switch; two battery modules, each of the two battery modules including three strings of battery cells, the three strings of battery cells configured to, at different times: be connected in series via a plurality of first switches of the switches and connected to the first positive terminal; a plurality of second switches in the switches are connected in parallel and connected to a second positive terminal; and disconnect from both the first and second positive terminals; and a switching control module configured to: determine a state of charge (SOC) of each of the battery cell strings; respectively utilizing model predictive control to determine the period of the phase so as to balance the SOC of the battery module; determining the periods of the strings to be connected during the phase using model predictive control, respectively, to balance the SOC of the battery cell strings; and selectively actuating the switch based on the period of the phase and the period of the battery cell string.
一种电池系统包括:开关;两个电池模块,两个电池模块中的每个电池模块包括三串电池单体,三串电池单体构造成在不同的时间:经由开关中的多个第一开关串联连接并连接至第一正端子;经由开关中的多个第二开关并联连接并连接至第二正端子;和与第一和第二正端子两者断开;和开关控制模块,其构造成:分别确定电池单体串的荷电状态(SOC);分别利用模型预测控制确定相位的周期,以平衡电池模块的SOC;分别利用模型预测控制确定在相位期间要连接的串的周期,以平衡电池单体串的SOC;和基于相位的周期和电池单体串的周期选择性地致动开关。
Battery string state of charge balancing system and method
电池串荷电状态平衡系统和方法
2023-06-02
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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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