US 12,283,699 B2
Solid state battery
Osamu Chikagawa, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Mar. 17, 2022, as Appl. No. 17/697,299.
Application 17/697,299 is a continuation of application No. PCT/JP2020/038273, filed on Oct. 9, 2020.
Claims priority of application No. 2019-187609 (JP), filed on Oct. 11, 2019.
Prior Publication US 2022/0209338 A1, Jun. 30, 2022
Int. Cl. H01M 50/141 (2021.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01); H01M 50/103 (2021.01); H01M 50/117 (2021.01); H01M 50/133 (2021.01); H01M 50/543 (2021.01)
CPC H01M 50/141 (2021.01) [H01M 10/0525 (2013.01); H01M 10/0562 (2013.01); H01M 50/103 (2021.01); H01M 50/117 (2021.01); H01M 50/133 (2021.01); H01M 50/543 (2021.01)] 13 Claims
OG exemplary drawing
 
1. A solid state battery comprising:
a battery element including, along a stacking direction, one or more battery constituent units including a positive electrode layer having a positive electrode extended portion, a negative electrode layer having a negative electrode extended portion, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer;
a first external terminal joined to the positive electrode extended portion of the positive electrode layer;
a second external terminal joined to the negative electrode extended portion of the negative electrode layer; and
a protective layer that covers a surface of the battery element other than the positive electrode extended portion of the positive electrode layer and the negative electrode extended portion of the, the protective layer including a side portion which is located on a central region of a side portion of the battery element extending in substantially a same direction as the stacking direction, a first portion of the side portion of the protective layer having a first thickness dimension that is larger than a second thickness dimension of a second portion of the side portion of the protective layer other than the first portion, and
a third thickness dimension of at least one of mutually opposing upper side portion and lower side portion of the protective layer on a main surface of the battery element extending in a direction substantially perpendicular to the stacking direction is larger than the first thickness dimension of the side portion of the protective layer.