BATTERY PACK AND BATTERY PACK MANUFACTURING METHOD

摘要

A battery pack comprises battery cells, a battery holder holding the battery cells, a waterproof bag storing the battery holder holding the battery cells as a waterproof structure, and a potting resin being injected in the waterproof bag, and the waterproof bag has a check valve which opens only at the time of exhausting an inner air. In a state that the potting resin is injected in the waterproof bag, the air inside the waterproof bag is exhausted through the check valve, and equally the potting resin tightly contacts the surfaces of the battery cells and the battery holder.