Battery Cell And Battery Module

Patent metadata

Field	Value
Publication number	US-2022320588-A1
Application number	US-202017616062-A
Country	US
Kind code	A1
Filing date	Jun 30, 2020
Priority date	Jul 9, 2019
Publication date	Oct 6, 2022
Grant date	—

Abstract

A battery cell with an electrode assembly and a pouch case is disclosed herein. The electrode assembly can including a positive electrode, a negative electrode, and a separator interposed therebetween. The electrode assembly can have a planar shape with four sides. The pouch case can accommodate the electrode assembly. The pouch case can include a first accommodating portion to accommodate a portion of the electrode assembly, a second accommodating portion to accommodate the remaining portion of the electrode assembly. A folding portion of the pouch case can be configured to fold the pouch case such that the first accommodating portion and the second accommodating portion face each other. The pouch case can include a seam allowance formed by boning an extension of a sealing portion of the pouch case to an extension of the folding portion at an intersection of the folding portion and the sealing portion.

First claim

1 . A battery cell comprising:
an electrode assembly including a positive electrode, a negative electrode, and a separator interposed therebetween, the electrode assembly having a planar shape with four sides; and a pouch case, the electrode assembly being accommodated in the pouch case, the pouch case including a first accommodating portion in which a portion of the electrode assembly is accommodated, a second accommodating portion in which the remaining portion of the electrode assembly is accommodated, and a folding portion configured to fold the pouch case such that the first accommodating portion and the second accommodating portion face each other,
the folding portion contacting one side of the electrode assembly,
the first accommodating portion and the second accommodating portion being in contact with each other adjacent three sides of the electrode assembly excluding the folding portion along an outer periphery of the electrode assembly to form a sealing portion,
wherein the pouch case includes a seam allowance portion formed by bonding an extension of the sealing portion to an extension surface of the folding portion at an intersection of the folding portion and the sealing portion.

2 . The battery cell of claim 1 , wherein
the sealing portion and the seam allowance portion form a T shape cross-section perpendicular to a thickness of the electrode assembly.

3 . The battery cell of claim 1 , wherein
the extension surface of the folding portion does not extend away from the sealing portion.

4 . The battery cell of claim 1 , wherein
the extension surface of the folding portion and one of the side surfaces of the electrode assembly lie on a common plane.

5 . The battery cell of claim 1 , wherein
the seam allowance portion has a symmetrical shape about the sealing portion.

6 . The battery cell of claim 1 , wherein
the electrode assembly includes an electrode lead connected to the positive electrode or the negative electrode, the electrode lead extending outside the sealing portion at one side perpendicular the folding portion.

7 . The battery cell of claim 1 , wherein
the pouch case is made of a sheet-like base material in which the first accommodating portion, the second accommodating portion, the folding portion, and the seam allowance portion are integrally formed.

8 . The battery cell of claim 1 , wherein
the sealing portion and the seam allowance portion form an arrow shape in a cross-section perpendicular to a thickness of the electrode assembly.

9 . A battery module comprising:
a battery cell stacked body formed by stacking a plurality of the battery cells according to claim 1 ; and a frame accommodating the battery cell stacked body.

10 . A battery pack comprising:
at least one battery module according to claim 9 ; and a pack case packaging for the at least one battery module.

11 . A device comprising at least one battery pack according to claim 10 .

Assignees

• Lg Energy Solution Ltd

Inventors

• Jung Kitaek
• Seong Junyeob
• Jeong Jee Hoon

Classifications

• H01M50/211

  adapted for pouch cells · CPC title

• H01M50/105 Primary

  Pouches or flexible bags · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/124

  having a layered structure · CPC title

• H01M50/186 Primary

  characterised by the disposition of the sealing members · CPC title