Battery block and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9799931-B2
Application number	US-201213813307-A
Country	US
Kind code	B2
Filing date	May 8, 2012
Priority date	May 30, 2011
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

A cell block including a metal case including a plurality of pipe-shaped members and a plurality of single cells housed in each of the pipe-shaped members. Each of the pipe-shaped members is joined at joining surfaces, and the pipe-shaped members are joined and integrated. A member for housing single cells is provided, and the housing member is molded with a high degree of accuracy and is capable of being manufactured at low cost and in a simple manner.

First claim

The invention claimed is:

1. A battery block, comprising:
a metallic case that includes a plurality of pipe-shaped members, each of the pipe-shaped members comprising a first brazed joint between mating faces of each of the pipe-shaped members; and
a plurality of unit cells that are accommodated in the plurality of pipe-shaped members, wherein the plurality of pipe-shaped members are joined to each other with a plurality of second brazed joints and are integrated with each other, wherein
each of the pipe-shaped members has a hollow interior and a protrusion at the mating faces, the protrusion protruding into the hollow interior of the pipe-shaped member, the protrusion extending continuously along the mating faces, wherein
the first brazed joint extends from the outer periphery surface of the pipe-shaped member to the hollow interior and is formed integrally with the protrusion as a brazing material, and
the protrusion is in contact with each of the plurality of unit cells.

2. The battery block according to claim 1 , wherein each of the pipe-shaped members comprises a metallic plate including a core material and a brazing material layer.

3. The battery block according to claim 1 , wherein each of the pipe-shaped members comprises aluminum, copper, brass, or stainless steel.

4. The battery block according to claim 1 , wherein each of the pipe-shaped members is a circular pipe or a polygonal pipe.

5. The battery block according to claim 1 , wherein each of the pipe-shaped members has a penetration slot or a notch portion.

6. The battery block according to claim 1 , wherein a gap between the mating faces is 0.05 to 0.2 mm.

7. The battery block according to claim 1 , wherein each protrusion suppresses vibration or rotation of the plurality of the unit cells accommodated in the plurality of the pipe-shaped members.

8. A method of manufacturing a battery block, the method comprising: a step of:
forming a plurality of pipe-shaped metallic plates having a brazing material layer on an outer circumferential surface by bending a plurality of metallic plates including a core material and the brazing material layer to constitute a plurality of corresponding mating faces;
forming an assembly of the plurality of pipe-shaped metallic plates by bringing the plurality of pipe-shaped metallic plates into contact with each other and fixing the plurality of pipe-shaped plates to each other;
forming a battery case by heating the assembly of the plurality of pipe-shaped metallic plates, brazing the plurality of corresponding mating faces of each of the plurality of pipe-shaped metallic plates to form a plurality of pipe-shaped members, and brazing the plurality of pipe-shaped metallic plates to each other, wherein each of the pipe-shaped members has a hollow interior and a protrusion at the mating faces, the protrusion protruding into the hollow interior of the pipe-shaped member; and
accommodating a unit cell in the hollow interior of each of the plurality of pipe-shaped members of the battery case such that the protrusion is in contact with the unit cell.

Assignees

• Hamada Hideaki
• Nishikawa Yukio
• Kurumaya Kazunori
• Okutani Oose
• Panasonic Ip Man Co Ltd

Inventors

• Hamada Hideaki
• Nishikawa Yukio
• Kurumaya Kazunori
• Okutani Oose

Classifications

• H01M50/264

  for cells or batteries, e.g. straps, tie rods or peripheral frames · CPC title

• H01M50/224

  Metals · CPC title

• H01M50/213 Primary

  adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) · CPC title

• B21C37/14

  Making tubes from doubled flat material · CPC title

• H01M10/04

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title