Granted Patent B2

US 12,626,957 · App. 16/555,932 · Granted May 12, 2026

Inventor: Hee Gyoung Kang (Daejeon, KR)

Assignee: SK On Co., Ltd.

H01M10/0587H01M50/103H01M50/105H01M50/178H01M50/54H01M50/548H01M50/55H01M50/553H01M50/557

Abstract

Claims (45)

1 . A battery cell comprising:

an electrode assembly; and

a case configured to house the electrode assembly,

wherein the case includes:

a first member configured to cover a lower portion of the electrode assembly, and

a second member configured to cover an upper portion of the electrode assembly and sealing with the first member,

wherein a first rear side of the first member and a second rear side of the second member are continuously connected and positioned behind the electrode assembly,

wherein the first member includes:

a first recess part configured to provide a space in which the lower side of the electrode assembly is housed and form the first rear side of the first member, and

a first sealing part extending forward from an upper end of the first recess part,

wherein the second member includes:

a second recess part configured to provide a space in which the upper side of the electrode assembly is housed and form the second rear side of the second member, and

a second sealing part extending forward from a lower end of the second recess part and in contact with the first sealing part,

wherein the second rear side of the second member includes:

a second rear side body leaning forward, and

a second rear edge portion bent forward from an upper end of the second rear side body,

wherein the first rear side of the first member includes:

a first rear side body connected to the second rear side body, and

a first rear edge portion which forms a lower end of the first rear side body,

wherein a front end of the second sealing part is in front of a front end of the first sealing part, and

wherein a rear end of the second sealing part is in front of a rear end of the first sealing part,

wherein the front end of the first sealing part and the front end of the second sealing part are positioned in front of the electrode assembly,

wherein the second rear side is inclined toward the electrode assembly with respect to the first rear side, and the second rear edge portion is positioned closer to the electrode assembly than the first rear edge portion.

2 . The battery cell according to claim 1 , wherein the first recess part and the second recess part have a smaller depth formed at a front side of the case than a depth formed at a rear side of the case.

3 . The battery cell according to claim 1 , wherein the rear side of the first member and the rear side of the second member form a close contact surface,

wherein the close contact surface has a longer length than a length in which the case extends in a direction perpendicular to a longitudinal direction of the close contact surface.

4 . The battery cell according to claim 3 , wherein the close contact surface has a longer length at least two times than the length in which the case extends in the direction perpendicular to the longitudinal direction of the close contact surface.

5 . The battery cell according to claim 1 , wherein the first recess part and the second recess part have inner volumes different from each other.

6 . A battery cell comprising:

an electrode assembly; and

a case enclosing the electrode assembly, the case including a first member including a first recess part and a first sealing part and a second member including a second recess part and a second sealing part,

wherein a lower portion of the electrode assembly is covered inside the first recess part, and a remaining upper portion of the electrode assembly is covered inside the second recess part,

wherein the second recess part is larger in width than the first recess part,

wherein the first and second members form a close contact side with which the electrode assembly is brought into close contact,

wherein the close contact side is positioned behind of the electrode assembly,

wherein the first and second sealing parts are sealed along the other sides of the case except for the one close contact side,

wherein an upper part of the close contact side includes:

an upper part body leaning forward; and

an upper part edge portion bent forward from an upper end of the upper part body, and

wherein a lower part of the close contact side includes:

a lower part body connected to the upper part body; and

a lower part edge portion which forms a lower end of the lower part body,

wherein a front end of the second sealing part is in front of a front end of the first sealing part, and a rear end of the second sealing part is in front of a rear end of the first sealing part,

wherein the front end of the first sealing part and the front end of the second sealing part are positioned in front of the electrode assembly, and

wherein the upper part body is inclined toward the electrode assembly with respect to the lower part body, and the upper part edge portion is positioned closer to the electrode assembly than the lower part edge portion.

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (44)