US 12,334,601 B2
Battery cell, electrolyte injection apparatus for battery cell, and electrolyte injection method using the same
Jong Hyuk Lee, Daejeon (KR); and Hee Gyoung Kang, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Dec. 22, 2021, as Appl. No. 17/559,188.
Claims priority of application No. 10-2020-0181313 (KR), filed on Dec. 22, 2020.
Prior Publication US 2022/0200112 A1, Jun. 23, 2022
Int. Cl. H01M 50/636 (2021.01)
CPC H01M 50/636 (2021.01) [H01M 2220/20 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A battery cell, formed as a pouch-type battery cell, comprising:
a case including an accommodation space accommodating an electrode assembly therein and a sealing portion disposed along a periphery of the accommodation space where an upper case and a lower case are in contact with each other to seal the accommodation space; and
a connection unit formed to have a tubular shape and having one end bonded to an external surface of the case,
wherein the case includes a projection formed to protrude outwardly,
wherein the projection is disposed in an internal surface of the connection unit,
wherein an internal space of the projection is disposed outwardly from an internal space of the case,
wherein the connection unit is spaced apart from the sealing portion, and a length of the connection unit in a first direction is less than the width of the sealing portion in the first direction, the first direction being a direction in which the sealing portion extends from the case,
wherein the sealing portion extends from the external surface of the case farther than the connection unit, and
wherein the connection unit is disposed side by side with the sealing portion in a position adjacent to the sealing portion.