A Low-Temperature Self-Heating Method with Temperature Consistency Control Capability Based on Reconfigurable Battery System

In the process of low temperature heating, the temperature rise of the batteries is significantly different, which is mainly because of the inconsistency of the internal resistance of the battery and the inconsistency of the thermal resistance between the battery and the external environment. Battery temperature inconsistency not only leads to nonuniform aging, but also causes the battery energy to be excessively consumed. In order to eliminate the inconsistent temperature rise of the battery in the process of low temperature heating, this paper proposes a low temperature self-heating method with local temperature control capability based on reconfigurable battery system. This innovative method can uniformly raise the temperature of the battery under extreme conditions, and significantly reduce energy consumption and heating time. Firstly, the reconfigurable battery system is designed and the modular reconfiguration topology is proposed. Secondly, the local temperature control heating strategy is designed and analyzed. Finally, the proposed heating method is verified.