US 12,142,783 B2
Battery module
Nobuo Iwatsuki, Hyogo (JP); Rui Ma, Hyogo (JP); Tsubasa Michikami, Hyogo (JP); and Eiji Kawasaki, Hyogo (JP)
Assigned to SANYO Electric Co., Ltd., Osaka (JP)
Appl. No. 17/266,690
Filed by SANYO Electric Co., Ltd., Osaka (JP)
PCT Filed Jul. 26, 2019, PCT No. PCT/JP2019/029351
§ 371(c)(1), (2) Date Feb. 8, 2021,
PCT Pub. No. WO2020/059298, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 2018-175025 (JP), filed on Sep. 19, 2018.
Prior Publication US 2021/0305654 A1, Sep. 30, 2021
Int. Cl. H01M 50/30 (2021.01); H01M 50/209 (2021.01); H01M 50/507 (2021.01)
CPC H01M 50/30 (2021.01) [H01M 50/209 (2021.01); H01M 50/507 (2021.01)] 4 Claims
OG exemplary drawing
 
1. A battery module comprising:
a battery stack configured to have a plurality of batteries stacked, each of the batteries including a valve portion and an output terminal on a terminal surface of the battery stack, the valve portion being configured to release a gas generated in the batteries;
a plurality of bus bars configured to electrically connect the output terminals of the plurality of batteries together, the plurality of bus bars grouping the plurality of batteries into a plurality of battery units each including at least two of the plurality of batteries, the plurality of bus bars each connecting in parallel the output terminals of at least two of the batteries in a corresponding one of the battery units, the plurality of bus bars connecting in series the battery units,
wherein the plurality of bus bars includes a first bus bar configured to connect together a first terminal group of the output terminals of a first subset of batteries of the plurality of batteries; and
a metal filter configured to be disposed within a predetermined region on one side of the valve portions when viewed in a direction perpendicular to the terminal surface,
the predetermined region is defined (i) between the valve portions and the first terminal group of the first subset of batteries in a first direction in which the valve portions and the first terminal group are arranged, and (ii) between ends of the first subset of batteries in a stacking direction of the plurality of batteries,
the battery module further comprising an exhaust duct configured to extend in the stacking direction of the plurality of batteries and to be connected to the valve portion of each of the plurality of batteries, wherein
the exhaust duct has a through-hole that connects inside and outside of the exhaust duct on a wall surface facing the first bus bar, and
the metal filter is disposed on a distribution path along which the gas travels from the valve portions toward the first bus bar via the through-hole.