Method for manufacturing prismatic secondary battery

Patent metadata

Field	Value
Publication number	US-11050092-B2
Application number	US-201916403914-A
Country	US
Kind code	B2
Filing date	May 6, 2019
Priority date	Oct 30, 2015
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A first electrode body element and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a lead portion of a positive electrode collector attached to a sealing plate, a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a lead portion of a negative electrode collector attached to the sealing plate, and the first electrode body element and the second electrode body element are arranged together as one such that an electrode body is formed.

First claim

What is claimed is:

1. A method for manufacturing a prismatic secondary battery including an electrode body that includes a positive electrode plate and a negative electrode plate, an outer package that includes an opening and that houses the electrode body, a sealing plate that seals the opening, a positive electrode terminal electrically connected to the positive electrode plate and attached to the sealing plate, a negative electrode terminal electrically connected to the negative electrode plate and attached to the sealing plate,
a positive electrode collector electrically connected to the positive electrode plate and the positive electrode terminal, and a negative electrode collector electrically connected to the negative electrode plate and the negative electrode terminal, the method comprising:
disposing a first electrode body element on a first side of the sealing plate in a short direction of the sealing plate and disposing a second electrode body element on a second side of the sealing plate in the short direction of the sealing plate,
wherein the first electrode body element includes the positive electrode plate including a first positive electrode tab portion and the negative electrode plate including a first negative electrode tab portion,
wherein the second electrode body element includes the positive electrode plate including a second positive electrode tab portion and the negative electrode plate including a second negative electrode tab portion,
electrically connecting the first positive electrode tab portion and the second positive electrode tab portion to the positive electrode terminal via the positive electrode collector and electrically connecting the first negative electrode tab portion and the second negative electrode tab portion to the negative electrode terminal via the negative electrode collector,
arranging the first electrode body element and the second electrode body element together as one; and
the first positive electrode tab portion and the second positive electrode tab portion are joined to a surface of the positive electrode collector which faces the electrode body and the first negative electrode tab portion and the second negative electrode tab portion are joined to a surface of the negative electrode collector which faces the electrode body.

2. The method for manufacturing a prismatic secondary battery according to claim 1 ,
wherein the positive electrode collector is disposed on the sealing plate with a positive electrode insulating member in between, and
wherein the negative electrode collector is disposed on the sealing plate with a negative electrode insulating member in between.

3. The method for manufacturing a prismatic secondary battery according to claim 1 ,
wherein the first electrode body element includes a plurality of the first positive electrode tab portions and a plurality of the first negative electrode tab portions,
the plurality of the first positive electrode tab portions are stacked and the plurality of the first negative electrode tab portions are stacked,
wherein the second electrode body element includes a plurality of the second positive electrode tab portions and a plurality of the second negative electrode tab portions, and
the plurality of the second positive electrode tab portions are stacked and the plurality of the second negative electrode tab portions are stacked.

4. The method for manufacturing a prismatic secondary battery according to claim 1 ,
wherein in the arranging, the first positive electrode tab portion, the second positive electrode tab portion, the first negative electrode tab portion, and the second negative electrode tab portion are bent.

5. The method for manufacturing a prismatic secondary battery according to claim 1 , further comprising:
covering the first electrode body element and the second electrode body element, which have been arranged together as one, with an insulating sheet, and subsequently inserting the first electrode body element and the second electrode body element covered with the insulating sheet into the outer package; and
an inner side insulating member disposed between the sealing plate and the negative electrode collector;
wherein an edge of the insulating sheet adjacent to the sealing plate is closer to the sealing plate than a surface of the inner side insulating member facing the first electrode body element and the second electrode body element.

6. The method for manufacturing a prismatic secondary battery according to claim 1 , further comprising:
covering the first electrode body element and the second electrode body element, which have been arranged together as one, with an insulating sheet, and subsequently inserting the first electrode body element and the second electrode body element covered with the insulating sheet into the outer package; and
an inner side insulating member is disposed between the sealing plate and the negative electrode collector;
the outer package includes a bottom, a pair of large-area side walls, and a pair of small-area side walls;
the insulating sheet is interposed between one of the pair of large-area side walls and the inner side insulating member, and between the other one of the pair of large-area side walls and the inner side insulating member.

7. The method for manufacturing a prismatic secondary battery according to claim 1 , wherein:
a distal end of the first positive electrode tab portion and a distal end of the second positive electrode tab portion are spaced apart from each other in the short direction of the sealing plate;
a distal end of the first negative electrode tab portion and a distal end of the second negative electrode tab portion are spaced apart from each other in the short direction of the sealing plate.

8. A method for manufacturing a prismatic secondary battery including an electrode body that includes a positive electrode plate and a negative electrode plate, an outer package that includes an opening and that houses the electrode body, a sealing plate that seals the opening,
a positive electrode terminal electrically connected to the positive electrode plate and attached to the sealing plate, a negative electrode terminal electrically connected to the negative electrode plate and attached to the sealing plate,
a positive electrode collector electrically connected to the positive electrode plate and the positive electrode terminal, and a negative electrode collector electrically connected to the negative electrode plate and the negative electrode terminal, the method comprising:
disposing a first electrode body element on a first side of the positive electrode collector and a first side of the negative electrode collector and disposing a second electrode body element on a second side of the positive electrode collector and a second side of the negative electrode collector,
wherein the first electrode body element includes the positive electrode plate including a first positive electrode tab portion and the negative electrode plate including a first negative electrode tab portion,
wherein the second electrode body element includes the positive electrode plate including a second positive electrode tab portion and the negative electrode plate including a second negative electrode tab portion,
electrically connecting the first positive electrode tab portion and the second positive electrode tab portion to the positive electrode collector and electrically connecting the first negative electrode tab portion and the second negative electrode tab portion to the negative electrode collector,
arranging the first electrode body element and the second electrode body element together as one; and
the first positive electrode tab portion and the second positive electrode

Assignees

• Sanyo Electric Co

Inventors

• Wakimoto Ryoichi
• Furukawa Hirofumi
• Kitaoka Kazuhiro
• Yamauchi Yasuhiro

Classifications

• H01M50/645

  Plugs · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title

• H01M50/55

  on the same side of the cell · CPC title

• H01M50/54

  Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges · CPC title

• H01M50/147

  Lids or covers · CPC title