Battery module and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-2016197315-A1
Application number	US-201414911815-A
Country	US
Kind code	A1
Filing date	Dec 26, 2014
Priority date	Mar 27, 2014
Publication date	Jul 7, 2016
Grant date	—

Abstract

A technique for sufficiently filling an adhesive between a battery retaining section of a holder and a battery cell in a battery module configured by the battery cell being inserted and adhered in the aperture-shaped battery retaining section provided in the holder is provided. An adhesive layer that adheres a holder and a battery cells in a battery module is formed in a two-layer structure of a holder-side adhesive layer making contact with an inner circumferential surfaces of a battery retaining sections and a cell-side adhesive layer making contact with an outer circumferential surfaces of the battery cells, and different types of adhesives are used for an adhesive configuring the holder-side adhesive layer and an adhesive configuring the cell-side adhesive layer.

First claim

1 . A method for manufacturing a battery module, the method comprising:
an inserting step of inserting a battery cell in a battery retaining section of a holder having the aperture-shaped battery retaining section, and provides an adhesive between an inner circumferential surface of the battery retaining section of the holder and an outer circumferential surface of the battery cell; and a cell fixing step of fixing the inner circumferential surface of the battery retaining section and the outer circumferential surface of the battery cell by the adhesive, wherein in the inserting step, an adhesive layer that is formed of the adhesive and provided between the inner circumferential surface of the battery retaining section and the outer circumferential surface of the battery cell on an entire circumference of the battery cell in a circumferential direction at least in a part of a region of the battery cell in an axial direction is formed, wherein the adhesive layer has a layer structure including a holder-side adhesive layer that makes contact with the inner circumferential surface of the battery retaining section and a cell-side adhesive layer that makes contact with the outer circumferential surface of the battery cell, and wherein different types of adhesives are used as the adhesive configuring the holder-side adhesive layer and the adhesive configuring the cell-side adhesive layer.

2 . The method for manufacturing a battery module according to claim 1 ,
wherein the different types of adhesives are a high viscosity adhesive, and a low viscosity adhesive with lower viscosity than the high viscosity adhesive.

3 . The method for manufacturing a battery module according to claim 1 ,
wherein in the inserting step, one of the adhesives is applied to the inner circumferential surface of the battery retaining section, the other of the adhesives is applied to the outer circumferential surface of the battery cell, and the battery cell is then inserted into the battery retaining section.

4 . The method for manufacturing a battery module according to claim 2 ,
wherein in the inserting step, the low viscosity adhesive is applied to the inner circumferential surface of the battery retaining section, and the high viscosity adhesive is applied to the outer circumferential surface of the battery cell.

5 . The method for manufacturing a battery module according to claim 4 ,
wherein the high viscosity adhesive is applied thicker than the low viscosity adhesive.

6 . A battery module comprising:
a holder including an aperture-shaped battery retaining section; a battery cell inserted into the battery retaining section; and an adhering layer that fixes an inner circumferential surface of the battery retaining section of the holder and an outer circumferential surface of the battery cell, wherein the adhering layer has a layer structure including a holder-side part making contact with the inner circumferential surface of the battery retaining section and a cell-side part making contact with the outer circumferential surface of the battery cell, and is provided between the inner circumferential surface of the battery retaining section and the outer circumferential surface of the battery cell on an entire circumference of the battery cell in a circumferential direction at least in a part of a region of the battery cell in an axial direction, and wherein the holder-side part and the cell-side part have different compositions.

7 . The battery module according to claim 6 ,
wherein one of the cell-side part and the holder-side part covers the other thereof at one end side of the adhering layer in the axial direction.

8 . The battery module according to claim 7 ,
wherein a thickness of a covering layer formed of the one of the cell-side part and the holder-side part and covering the other thereof at the one end side of the adhering layer in the axial direction is formed thicker toward the one end side.

Assignees

• Toyoda Gosei Kk

Inventors

• Tatsumi Yoshiaki
• Kusaba Kosuke

Classifications

• H01M50/213 Primary

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

• H01M50/51

  Connection only in series · CPC title

• H01M50/107

  having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/507

  comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules · CPC title

• H01M2/024 Primary

  Electricity · mapped topic