| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery pack capable of raising temperature of a battery while preventing expansion of capacity of the battery pack.SOLUTION: A battery pack has: an upper stage side power accumulation part in which at least two power accumulation stacks formed by laminating electric cells in a first direction are arranged in a second direction orthogonal to the first direction; a lower stage side power accumulation part which is installed at a lower part of the upper stage side power accumulation part; a pack case which accommodates the upper stage side power accumulation part and the lower stage side power accumulation part; and a reinforcement frame which is the hollow structured reinforcement frame for reinforcing structure of the pack case, arranged at a corresponding position between the adjacent power accumulation stacks, and extends in the first direction along the power accumulation stacks, in which a heater extending in the first direction is installed at least at one of an inside bottom surface and an outer bottom surface of the reinforcement frame. |
