底面液冷方式を適用したリチウムイオン電池モジュールの冷却性能評価

抄録

When lithium-ion batteries are used long time by high temperature, their battery capacities may decay. Therefore, we developed lithium-ion battery modules to which bottom water-cooling is applied in order to reduce the rise in heat of batteries. As a result of evaluating the rise in heat of lithium-ion battery module, it was proved that the rise in heat would be less than 15K in 6C charge-discharge cycle. Heat resistance of lithium-ion battery module became low so that Reynolds number was high, but it turned out that the amount of change is a tendency which becomes small gradually. The most important thing to improve performance of bottom water-cooling system is structure which carries the heat from the inside of batteries efficiently.