| CPC H01M 10/653 (2015.04) [H01M 10/6556 (2015.04)] | 5 Claims |
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1. A temperature adjustment device configured to adjust temperatures of a plurality of batteries in a battery pack including the plurality of batteries arranged with axial directions aligned, the temperature adjustment device comprising:
an insulation layer provided in contact with bottom parts of the plurality of batteries; and
a flow passage forming member configured to be located on a side opposite to the plurality of batteries with the insulation layer interposed therebetween, and to form a flow passage of cooling medium, wherein
the flow passage includes
a plurality of cooling flow passages configured to face bottom surfaces of the plurality of batteries with at least the insulation layer interposed therebetween,
a common inflow passage configured to be connected to the plurality of cooling flow passages and to flow the cooling medium in the plurality of cooling flow passages, and
a common exhaust passage configured to collect and exhaust the cooling medium exhausted from the plurality of cooling flow passages,
a cross-sectional area of a cooling flow passage corresponding to a first battery of the plurality of batteries among cross-sectional areas of the plurality of cooling flow passages is larger than a cross-sectional area of a cooling flow passage corresponding to a second battery whose temperature is lower than the temperature of the first battery in a use state among the plurality of batteries, and
the cross-sectional areas of the plurality of cooling flow passages have cross sections parallel to a face of the insulation layer in contact with the bottom surfaces.
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