| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery pack which secures the sealability of a storage case and cools the interior of the storage case.SOLUTION: A battery pack 11 includes a storage case 33 which stores battery cells 31 and may be attached to or removed from a tool body. The battery pack 11 includes: an insulative covering material which covers the battery cells 31 with electrodes of the battery cells 31 exposed; a holder 32 which holds the battery cells 31 covered by the covering material in the storage case 33; and an opening part 45 provided at the holder 32 and exposing portions of the battery cells 31, which are covered by the covering material, to a passage 66 of air flowing in the storage case 33. |
