US 11,837,705 B2
Partition member, assembled battery and method for controlling heat transfer in an assembled battery
Yoko Watanabe, Chiyoda-ku (JP); Tomohiro Kawai, Chiyoda-ku (JP); and Iwao Soga, Chiyoda-ku (JP)
Assigned to Mitsubishi Chemical Corporation, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Mar. 25, 2022, as Appl. No. 17/656,632.
Application 17/656,632 is a division of application No. 16/452,587, filed on Jun. 26, 2019, abandoned.
Application 16/452,587 is a continuation of application No. PCT/JP2017/047090, filed on Dec. 27, 2017.
Claims priority of application No. 2016-254342 (JP), filed on Dec. 27, 2016.
Prior Publication US 2022/0223946 A1, Jul. 14, 2022
Int. Cl. H01M 10/617 (2014.01); H01M 10/625 (2014.01); H01M 10/627 (2014.01); H01M 10/651 (2014.01); H01M 10/658 (2014.01); H01M 10/6555 (2014.01); H01M 50/291 (2021.01); H01M 50/204 (2021.01)
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
OG exemplary drawing
 
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.