| 摘要 |
A battery system of the invention includes a plurality of electrical cells, a battery accommodation casing, and a cooling fan. A bottom portion of an accommodation portion of the battery accommodation casing is provided with a cooling fluid introduction port that introduces the cooling air, and any one or both of the side portion side of a cover portion of the battery accommodation casing and the upper portion side of a side portion of the accommodation portion are provided with a cooling fluid discharge port (a first cooling fluid discharge port) that discharges air inside the battery accommodation casing. Furthermore, the cover portion facing the accommodation portion is provided with a cooling air guide portion.
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