US 12,355,038 B2
Battery module, and method of manufacturing battery module
Manabu Fukuoka, Kanagawa (JP); Masayuki Nakai, Kanagawa (JP); Gen Takayama, Kanagawa (JP); Yuta Motohashi, Kanagawa (JP); Fumio Kishida, Kanagawa (JP); and Masahiro Nakamoto, Kanagawa (JP)
Assigned to Envision AESC Japan Ltd., Kanagawa (JP)
Appl. No. 16/976,734
Filed by Envision AESC Japan Ltd., Kanagawa (JP)
PCT Filed Mar. 30, 2018, PCT No. PCT/JP2018/013744
§ 371(c)(1), (2) Date Aug. 28, 2020,
PCT Pub. No. WO2019/187043, PCT Pub. Date Oct. 3, 2019.
Prior Publication US 2021/0043981 A1, Feb. 11, 2021
Int. Cl. H01M 10/28 (2006.01); H01M 50/204 (2021.01); H01M 50/211 (2021.01); H01M 50/291 (2021.01); H01M 50/293 (2021.01); H01M 50/54 (2021.01)
CPC H01M 10/281 (2013.01) [H01M 50/204 (2021.01); H01M 50/211 (2021.01); H01M 50/291 (2021.01); H01M 50/293 (2021.01); H01M 50/54 (2021.01)] 19 Claims
OG exemplary drawing
 
1. A battery module including a cell stack in which a plurality of plate-shaped cells is stacked such that each main surface, which is a surface of each of the plate-shaped cells in a cell thickness direction, faces one another, the battery module comprising:
a frame-shaped protruding portion that is formed on a main surface of one plate-shaped cell among the plurality of plate-shaped cells, protrudes from the main surface of the one plate-shaped cell in the cell thickness direction, and is formed in a frame shape that is opened in the cell thickness direction; and
a filler that fills an inner space of the frame-shaped protruding portion, the inner space being defined by the frame-shaped protruding portion, the main surface of the one plate-shaped cell, and a main surface of another plate-shaped cell facing the one plate-shaped cell in a stacking direction among the plurality of plate-shaped cells, wherein:
the filler is a plastic fluid having fluidity at least when pressurized,
the one plate-shaped cell and the another plate-shaped cell are connected to spacers, respectively, and
as the spacers adjoin to be brought into close contact with each other, the filler is compressed by the one plate-shaped cell and the another plate-shaped cell to have fluidity, and then is cured into a gel state to apply a pressing force to the one plate-shaped cell and to the another plate-shaped cell,
wherein a protective protruding portion is formed on the main surface at a position located outside the frame-shaped protruding portion.