The invention discloses an active equalization architecture of a multi-branch parallel battery system and a control method in the technical field of battery management, and aims to solve the problem of capacity deviation in the prior art. The system comprises a battery system, a bidirectional DC/DC module and a vehicle-mounted low-voltage battery module, the battery system comprises a plurality of first-level frameworks connected in parallel, a plurality of second-level frameworks connected in parallel and in one-to-one correspondence with the first-level frameworks, and a third-level framework, the first-stage framework is a battery pack, the second-stage framework is battery distribution units BDU, and the third-stage framework is a high-voltage box electrically connected with each battery distribution unit BDU; the bidirectional DC/DC module is electrically connected with the high-voltage box; and the vehicle-mounted low-voltage battery module is electrically connected with the bidirectional DC/DC module. According to the invention, the battery pack capacity of the low-SOC branch of the battery system can be charged, and the branch with high SOC can be discharged, so that active equalization of the battery pack capacity of each branch can be realized, and charging of the low-voltage battery can be realized.
本发明公开了一种电池管理技术领域的多支路并联电池系统的主动均衡架构及控制方法,旨在解决现有技术中容量偏差的问题。其包括电池系统、双向DC/DC模块和车载低压电池模块;电池系统包括:若干并联的第一级架构、若干并联的并与所述第一级架构一一对应的第二级架构、第三级架构;第一级架构为电池包,第二级架构为电池配电单元BDU,第三级架构为与每个所述电池配电单元BDU电连接的高压箱;双向DC/DC模块与高压箱电连接;车载低压电池模块与双向DC/DC模块电连接。本发明能够对电池系统的低SOC支路电池包容量进行充电,对SOC较高的支路进行放电,既实现各支路电池包容量的主动均衡,又实现对低压电池的补电。
Active equalization architecture of multi-branch parallel battery system and control method
一种多支路并联电池系统的主动均衡架构及控制方法
2025-03-07
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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