US 12,224,443 B2
Secondary battery electrode plate and secondary battery using same
Hiroyuki Tajima, Hyogo (JP); and Tetsuya Sato, Hyogo (JP)
Assigned to SANYO Electric Co., Ltd., Osaka (JP)
Appl. No. 17/311,967
Filed by SANYO Electric Co., Ltd., Daito (JP)
PCT Filed Dec. 17, 2019, PCT No. PCT/JP2019/049491
§ 371(c)(1), (2) Date Jun. 8, 2021,
PCT Pub. No. WO2020/130000, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 2018-236843 (JP), filed on Dec. 19, 2018.
Prior Publication US 2022/0029167 A1, Jan. 27, 2022
Int. Cl. H01M 50/534 (2021.01); H01M 4/134 (2010.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 4/02 (2006.01); H01M 50/588 (2021.01); H01M 50/593 (2021.01)
CPC H01M 4/623 (2013.01) [H01M 4/134 (2013.01); H01M 4/661 (2013.01); H01M 50/534 (2021.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 50/588 (2021.01); H01M 50/593 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A secondary battery electrode plate comprising a metal core body and an active material layer on both major surfaces of the core body, the both major surfaces of the core body being opposite to each other, wherein
the electrode plate has a first side, a second side opposite to the first side, and a tab that protrudes from the first side,
a coating containing fluorine is formed on an end surface of the core body on the first side, the end surface of the core body being connected to the both major surfaces of the core body,
the active material layer is located away from the first side of the electrode plate,
the coating containing fluorine is disposed on a portion of the end surface which is non-coplanar with the major surfaces of the core body,
the coating is a coating containing aluminum fluoride, and
the thickness of the coating is less than 1 μm.