Exterior for Secondary Battery and Apparatus and Method for Manufacturing Exterior for Secondary Battery

Patent metadata

Field	Value
Publication number	US-2022158282-A1
Application number	US-202017437568-A
Country	US
Kind code	A1
Filing date	Mar 25, 2020
Priority date	Apr 1, 2019
Publication date	May 19, 2022
Grant date	—

Abstract

Disclosed are an exterior for a secondary battery and an apparatus and method for manufacturing the exterior for the secondary battery.According to one aspect of the present invention, a method for manufacturing an exterior for a secondary battery comprises: a first step of preparing a sheet and a mold in which a recess part (I) is formed; a second step of locating the sheet so that a portion of the sheet faces the recess part (I); and a third step of supplying a fluid from the side of the mold toward the recess part (I) to form a forming part having a shape corresponding to that of the recess part (I) in an area of the sheet, which is provided on the recess part (I).

First claim

1 . A method for manufacturing an exterior for a secondary battery, the method comprising:
a first step of preparing a sheet and a mold in which a recess part having a recessed shape is formed; a second step of locating the sheet so that a portion of the sheet faces the recess part of the mold; and a third step of supplying a fluid from a side of the mold toward the recess part to form a forming part having a shape corresponding to a shape of the recess part in an area of the sheet, which is provided on the recess part.

2 . The method of claim 1 , wherein, in the first step, the mold comprises a first mold and a second mold provided above the first mold, and
in the second step, a portion of the sheet is provided between the first mold and the second mold, wherein a recess part of the first mold and a recess part of the second mold are provided to face each other.

3 . The method of claim 2 , wherein, in the second step, the sheet is folded, and the sheet is disposed between the first mold and the second mold in a state in which the sheet is divided into a first sheet part and a second sheet part by using a folded area as a boundary, and
in the third step, the fluid is introduced between the first sheet part and the second sheet part.

4 . (canceled)

5 . The method of claim 2 , wherein, in the third step, a circumference of the recess part of the first mold of the mold and a circumference of the recess part of the second mold of the mold are pressed with respect to each other to seal an inner space formed by the recess part of the first mold and the recess part of the second mold, which face each other, from an outside.

6 . The method of claim 1 , wherein, in the second step, the sheet is disposed so that a portion of an area of the recess part faces the sheet, and another portion of the area of the recess part does not face the sheet.

7 . The method of claim 6 , wherein, in the third step, an area of the sheet, which faces the recess part is elongated by the supplied fluid, and at least a portion of the another portion of the area of the recess part, which does not face the sheet in the second step, faces the sheet.

8 . An apparatus for manufacturing an exterior for a secondary battery, the apparatus comprising:
a mold in which a recess part having a recessed shape is provided; and a fluid supply device configured to supply a fluid toward the recess part (I), wherein the fluid supply device comprises: a duct extending from a side of the mold toward the recess part to provide a path through which the fluid flows.

9 . The apparatus of claim 8 , wherein the mold comprises a first mold and a second mold,
one or more grooves are defined in each of the first mold and the second mold, a recess part of the first mold and a recess part of the second mold are provided to face each other, the one or more grooves of the first mold and the one or more grooves of the second mold are provided to face each other, and the duct is configured to be inserted into a hole defined by the one or more grooves of the first mold and the one or more grooves of the second mold, which face each other.

10 . The apparatus of claim 9 , wherein the duct extends up to the recess part of the first mold and the recess part of the second mold.

11 . The apparatus of claim 9 , wherein the duct extends up to the one or more grooves of the first mold and the one or more grooves of the second mold.

12 . The apparatus of claim 9 , wherein the hole defined by the one or more grooves of the first mold and the one or more grooves of the second mold, which face each other, is provided in plurality.

13 . The apparatus of claim 9 , wherein a vertical cross-section of the hole defined by the one or more grooves of the first mold and the one or more grooves of the second mold, which face each other, has a circular shape, an oval shape, or a rectangular shape.

14 . An exterior for a secondary battery, comprising:
a forming part having a predetermined thickness (t) and defining a space therein; and a sealing part disposed on a circumference of the forming part, wherein an entire area of the sealing part has a structure in which two sheets are entirely bonded to each other, and the sealing part is spaced a predetermined length (L) from one side surface of the forming part.

15 . The exterior of claim 14 , wherein the circumference of the forming part is constituted by the one side surface and three additional side surfaces,
the sealing part is disposed along the three additional side surfaces of the forming part, and the sealing part is spaced the predetermined length from the one side surface of the forming part, on which the sealing part is not disposed.

16 . The method of claim 1 , wherein the fluid is air.

17 . The method of claim 1 , wherein the fluid is a liquid that does not react with the sheet.

Assignees

• Lg Energy Solution Ltd

Inventors

• Kim Hyun Beom
• Jang Nam Jin
• Kim Gi Man

Classifications

• H01M50/105 Primary

  Pouches or flexible bags · CPC title

• B29C51/105 Primary

  Twin sheet thermoforming, i.e. deforming two parallel opposing sheets or foils at the same time by using one common mould cavity and without welding them together during thermoforming (B29C51/267, B29C49/0691 take precedence) · CPC title

• H01M50/183

  Sealing members · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• B29C49/06912 Primary

  using folded sheets as a preform, e.g. folded into parallel sheets or rolled into cylindrical shape · CPC title