US 12,381,284 B2
Battery module
Kazunori Ojima, Hitachinaka (JP); Sadayuki Aoki, Hitachinaka (JP); Osamu Kubota, Hitachinaka (JP); and Yoshitaka Watahiki, Hitachinaka (JP)
Assigned to Vehicle Energy Japan Inc., Hitachinaka (JP)
Appl. No. 17/635,943
Filed by Vehicle Energy Japan Inc., Hitachinaka (JP)
PCT Filed Aug. 28, 2020, PCT No. PCT/JP2020/032510
§ 371(c)(1), (2) Date Feb. 16, 2022,
PCT Pub. No. WO2021/044952, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 2019-161427 (JP), filed on Sep. 4, 2019.
Prior Publication US 2022/0294073 A1, Sep. 15, 2022
Int. Cl. H01M 50/298 (2021.01)
CPC H01M 50/298 (2021.01) 3 Claims
OG exemplary drawing
 
1. A battery module comprising:
a plurality of battery cells that are stacked and disposed; and
a wiring member disposed on a terminal side of the plurality of battery cells and adapted to detect a state of the plurality of battery cells,
wherein:
in the wiring member, an insulative insulating layer, a wiring layer disposed on one surface side of the insulating layer and including a plurality of detection lines to detect the state of the plurality of battery cells, and a ground layer disposed in a position corresponding to at least the wiring layer, on another surface side of the insulating layer and having a ground potential are stacked,
the ground layer is a conductive pattern in which a plurality of through holes is formed on a conductive layer and that has the ground potential,
the conductive pattern includes at least a first pattern portion disposed in a first area of the conductive pattern so as to correspond to at least one of the detection lines and a second pattern portion disposed in a second area of the conductive pattern different from the first area so as to correspond to at least another of the detection lines, and
the first pattern portion has a first area ratio of an area of the conductive layer in the first pattern portion to an entire area of the first pattern portion including the through holes, the second pattern portion has a second area ratio of an area of the conductive layer in the second pattern portion to an entire area of the second pattern portion including the through holes, and the second area ratio is larger than the first area ratio.