CPC H01M 10/617 (2015.04) [H01M 10/625 (2015.04); H01M 10/627 (2015.04); H01M 10/651 (2015.04); H01M 10/658 (2015.04); H01M 10/6555 (2015.04); H01M 50/204 (2021.01); H01M 50/291 (2021.01); H01M 2220/10 (2013.01); H01M 2220/20 (2013.01)] | 11 Claims |
1. A partition member which separates single cells that make up an assembled battery, the partition member comprising:
a bag structure made from a first material, the bag structure having a hollow interior and having two surfaces in a thickness direction,
wherein the bag structure retains a second material within the hollow interior,
wherein a thermal resistance of one of the two surfaces per unit area (θ1) of the bag structure in the thickness direction satisfies θ1≥5.0×10−3 (m2·K/W) at a temperature greater than 180° C.,
wherein a thermal resistance of both of the two surfaces per unit area (θ2) of the bag structure in the thickness direction satisfies θ2≤4.0×10−3 (m2·K/W) at a temperature below 80° C., and
wherein the second material includes a substance that is in a fluid state that is liquid or other than liquid at 80° C. to 180° C.
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