Power storage module and method for manufacturing power storage module

Patent metadata

Field	Value
Publication number	US-11955593-B2
Application number	US-201916963376-A
Country	US
Kind code	B2
Filing date	Jan 28, 2019
Priority date	Jan 30, 2018
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

A power storage module includes an electrode laminate including a plurality of bipolar electrodes which are laminated and a sealing body sealing a space between a pair of the bipolar electrodes adjacent to each other in a laminating direction among the plurality of bipolar electrodes in the electrode laminate. Each of the plurality of bipolar electrodes includes an electrode plate. The sealing body includes a group of primary sealing bodies each provided at an edge portion of the electrode plate and a secondary sealing body. The secondary sealing body includes a first resin portion that is provided along a side surface of the electrode laminate extending in the laminating direction and bonds the group of primary sealing bodies, and a second resin portion covering the first resin portion.

First claim

The invention claimed is:

1. A power storage module comprising:
an electrode laminate including a plurality of bipolar electrodes which are laminated; and
a sealing body sealing a space between a pair of the bipolar electrodes adjacent to each other in a laminating direction among the plurality of bipolar electrodes in the electrode laminate,
wherein each of the plurality of bipolar electrodes includes an electrode plate,
the sealing body includes a group of primary sealing bodies each provided at an edge portion of the electrode plate of each of the plurality of bipolar electrodes and a secondary sealing body, and
the secondary sealing body includes
a first resin portion that is provided along a side surface of the electrode laminate extending in the laminating direction and bonds the group of primary sealing bodies, and
a second resin portion covering the first resin portion.

2. The power storage module according to claim 1 ,
wherein the first resin portion includes
a first side surface part that is provided along the side surface and bonds the group of primary sealing bodies, and
a first overhang part overhanging one end surface of the electrode laminate in the laminating direction from the first side surface part, and
the second resin portion includes
a second side surface part provided along the first side surface part, and
a second overhang part overhanging the other end surface of the electrode laminate in the laminating direction from the second side surface part.

3. The power storage module according to claim 2 ,
wherein a length of the first overhang part in the laminating direction is longer than a length of the second overhang part in the laminating direction.

4. The power storage module according to claim 1 ,
wherein the second resin portion includes
a side surface part provided along the first resin portion,
a first overhang part overhanging one end surface of the electrode laminate in the laminating direction from the side surface part, and
a second overhang part overhanging the other end surface of the electrode laminate in the laminating direction from the side surface part.

5. The power storage module according to claim 1 ,
wherein a resin forming the first resin portion is the same as a resin forming the second resin portion.

6. The power storage module according to claim 2 ,
wherein a resin forming the first resin portion is the same as a resin forming the second resin portion.

7. The power storage module according to claim 3 ,
wherein a resin forming the first resin portion is the same as a resin forming the second resin portion.

8. The power storage module according to claim 4 ,
wherein a resin forming the first resin portion is the same as a resin forming the second resin portion.

9. A method for manufacturing a power storage module comprising:
an electrode laminate-forming step of forming an electrode laminate by laminating bipolar electrodes each provided with a primary sealing body at an edge portion; and
a secondary sealing body-forming step of forming a secondary sealing body bonding a group of the primary sealing bodies by injection molding of a resin,
wherein the secondary sealing body-forming step includes
a first resin portion-forming step of forming a first resin portion bonding the group of the primary sealing bodies along a side surface extending in a laminating direction of the electrode laminate and
a second resin portion-forming step of forming a second resin portion covering the first resin portion.

10. The method for manufacturing a power storage module according to claim 9 ,
wherein, in the first resin portion-forming step, a first side surface part is formed along the side surface, and a first overhang part overhanging one end surface of the electrode laminate in the laminating direction from the first side surface part is formed, and,
in the second resin portion-forming step, a second side surface part is formed along the first side surface part, and a second overhang part overhanging the other end surface of the electrode laminate in the laminating direction from the second side surface part is formed.

11. The method for manufacturing a power storage module according to claim 9 ,
wherein, in the second resin portion-forming step, a side surface part is formed along the first resin portion, and a first overhang part overhanging one end surface of the electrode laminate in the laminating direction from the side surface part, and a second overhang part overhanging the other end surface of the electrode laminate in the laminating direction from the side surface part are formed.

12. The method for manufacturing a power storage module according to claim 9 , wherein the first resin portion-forming step and the second resin portion-forming step include the injection molding of the resin.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Tamaru Kojiro
• Yamasaki Takafumi
• Ueda Hiromi
• MARIYA Tsuyoshi
• Yamada Masahiro

Classifications

• H01M10/0418 Primary

  with bipolar electrodes · CPC title

• H01G11/12

  Stacked hybrid or EDL capacitors · CPC title

• H01G11/80

  Gaskets; Sealings · CPC title

• H01G11/84

  Processes for the manufacture of hybrid or EDL capacitors, or components thereof · CPC title

• H01M10/04

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