US 11,757,293 B2
Battery pack, and electric appliance using battery pack
Tomomasa Nishikawa, Ibaraki (JP); Masayuki Ogura, Ibaraki (JP); Masaru Hirano, Ibaraki (JP); Takuhiro Murakami, Ibaraki (JP); Nobuhiro Takano, Ibaraki (JP); Osamu Kawanobe, Ibaraki (JP); Akira Matsushita, Ibaraki (JP); and Hayato Yamaguchi, Ibaraki (JP)
Assigned to Koki Holdings Co., Ltd., Tokyo (JP)
Appl. No. 16/346,117
Filed by Koki Holdings Co., Ltd., Tokyo (JP)
PCT Filed Oct. 27, 2017, PCT No. PCT/JP2017/038951
§ 371(c)(1), (2) Date Apr. 30, 2019,
PCT Pub. No. WO2018/079724, PCT Pub. Date May 3, 2018.
Claims priority of application No. 2016-213113 (JP), filed on Oct. 31, 2016; application No. 2016-213115 (JP), filed on Oct. 31, 2016; application No. 2016-213118 (JP), filed on Oct. 31, 2016; and application No. 2017-190371 (JP), filed on Sep. 29, 2017.
Prior Publication US 2019/0260209 A1, Aug. 22, 2019
Int. Cl. H02J 7/00 (2006.01); B25F 5/00 (2006.01); H01M 50/247 (2021.01); H01M 50/519 (2021.01); H01M 50/213 (2021.01); H01M 50/502 (2021.01)
CPC H02J 7/0024 (2013.01) [B25F 5/00 (2013.01); H01M 50/247 (2021.01); H01M 50/519 (2021.01); H02J 7/00 (2013.01); H01M 50/213 (2021.01); H01M 50/502 (2021.01); H01M 2220/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A battery pack, comprising:
a plurality of cell units, each cell unit having at least one cell;
a case body, housing the plurality of cell units, and having a mounting part configured to mount the battery pack on an electrical device body forward in a front-rear direction, and
an operation part, housed in the case body, and configured to switch a connection state of the plurality of cell units when the operation part moves from a first position to a second position,
wherein, the operation part is configured to abut a switching element of the electrical device body and to move from the first position to the second position when the battery pack is mounted to the electrical device body, thereby switching the connection state of the plurality of cell units, and
wherein, the operation part is configured to stay at the second position when the battery pack is removed from the electrical device body, thereby keeping the connection state of the plurality of cell units.