Energy storage battery packs generate a significant amount of heat during operation, affecting battery performance and lifespan, and potentially leading to safety risks. Consequently, the design of efficient battery cooling plates is essential for maintaining the performance of energy-storage battery packs. This study performs a comparative investigation of the cooling efficacy of entire cooling plate vs. micro-channel cooling plate. We created and enhanced three model sets for the two types of cooling plates. The findings indicate that lowering the coolant inlet temperature reduces the peak temperature of the batteries in both cooling plate types, while simultaneously increasing the maximum temperature differential. Augmenting the coolant flow rate concurrently diminishes both the peak battery temperature and the maximum temperature differential. From the three models of entire cooling plates, it was found that optimization measures such as reducing channel spacing and increasing the coolant flow distance can improve cooling efficiency. After op¬timization, the maximum temperature of the A-group model decreased by 1.57°C compared to the initial model. The optimization of the micro-channel cooling plate ensured uniform distribution over the battery module while preserving fluid dynamics inside the micro-channel configuration. Following optimization, the E-group model demonstrated a temperature decrease of 1.35°C relative to the baseline model, attaining a cooling effect comparable to that of the solid cooling plate. By comparing and analyzing the convective heat transfer coefficient and Nusselt number of the cooling plate at a min of 3 Lpm, it was verified that the optimized micro-channel cooling plate heat dissipation performance is consistent with entire cooling plates.