LFP Battery Pack Combined Heat Dissipation Strategy Structural Design

During the high-power charging and discharging process, the heat generated by the energy storage battery increases significantly, causing the battery temperature to rise sharply and the temperature distribution to become uneven, thus posing safety risks. To optimize the heat dissipation performance of the energy storage battery pack, this article conducts a simulation analysis of heat generation and heat conduction on 21 280Ah lithium iron phosphate (LFP) square aluminum shell battery packs and explores the effects of natural convection and liquid cooling on heat dissipation under 1C charging conditions. The method affects the temperature rise of the battery pack, and based on this, it proposes a heat dissipation strategy that combines air cooling and liquid cooling. The simulation finds that under natural convection conditions, the maximum temperature of the battery pack can reach approximately 61.6°C; when liquid cooling is used, the maximum temperature can be reduced to approximately 59.5°C; and after applying the proposed joint heat dissipation strategy, the maximum temperature of the battery pack is further reduced to approximately 49.8°C. These results show that the heat dissipation performance of the energy storage battery pack can be effectively improved by adopting a joint heat dissipation strategy, thereby reducing safety risks.