Power storage device

Patent metadata

Field	Value
Publication number	US-12080900-B2
Application number	US-201816978282-A
Country	US
Kind code	B2
Filing date	Dec 12, 2018
Priority date	Mar 9, 2018
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

A power storage device includes a power storage module and a pair of conductive plates configured to sandwich the power storage module. The power storage module has an electrode laminate and a sealing body configured to seal the electrode laminate. The electrode laminate includes a plurality of laminated bipolar electrodes and a pair of terminal electrodes. The pair of terminal electrodes is disposed at laminate ends of the electrode laminate and each includes an electrode plate. The sealing body has a pair of resin portions provided at the edge portions of the terminal electrodes. At least one conductive plate of the pair of conductive plates is disposed to oppose the terminal electrode in the laminating direction of the electrode laminate and to overlap a corresponding resin portion of the pair of resin portions when seen in the laminating direction.

First claim

The invention claimed is:

1. A power storage device, comprising:
a power storage module; and
a pair of conductive plates configured to sandwich the power storage module,
wherein the power storage module has an electrode laminate including a plurality of laminated bipolar electrodes and a pair of terminal electrodes, and a sealing body configured to seal the electrode laminate,
the pair of terminal electrodes is disposed at laminate ends of the electrode laminate and each includes an electrode plate and an active material layer provided on a surface of the electrode plate that faces an inside of the electrode laminate,
the sealing body has a pair of resin portions provided at edge portions of the pair of terminal electrodes,
at least one conductive plate of the pair of conductive plates is disposed to face a corresponding terminal electrode of the pair of terminal electrodes in a laminating direction of the electrode laminate and overlap a corresponding resin portion of the pair of resin portions when seen in the laminating direction,
the at least one conductive plate directly contacts the electrode plate of the corresponding terminal electrodes at a surface that faces away from the electrode laminate,
the active material layer of each terminal electrode is provided only on the surface of the electrode plate that faces the inside of the electrode laminate, and
the at least one conductive plate has a plurality of flow paths extending in a direction perpendicular to the laminating direction and configured to circulate coolant across a length of the at least one conductive plate in the direction perpendicular to the laminating direction.

2. The power storage device according to claim 1 ,
wherein the one conductive plate is disposed to overlap the corresponding resin portion throughout an entire circumference of the edge portion of the corresponding terminal electrode when seen in the laminating direction.

3. The power storage device according to claim 1 ,
wherein a length of an edge portion of the electrode laminate in the laminating direction is shorter than a length of a central portion of the electrode laminate in the laminating direction.

4. The power storage device according to claim 1 ,
wherein the one conductive plate is in contact with the corresponding resin portion.

5. The power storage device according to claim 1 ,
wherein each of the pair of conductive plates is disposed to oppose each of the pair of terminal electrodes in the laminating direction of the electrode laminate and to overlap each of the pair of resin portions when seen in the laminating direction.

6. The power storage device according to claim 2 ,
wherein a length of an edge portion of the electrode laminate in the laminating direction is shorter than a length of a central portion of the electrode laminate in the laminating direction.

7. The power storage device according to claim 2 ,
wherein the one conductive plate is in contact with the corresponding resin portion.

8. The power storage device according to claim 3 ,
wherein the one conductive plate is in contact with the corresponding resin portion.

9. The power storage device according to claim 2 ,
wherein each of the pair of conductive plates is disposed to oppose each of the pair of terminal electrodes in the laminating direction of the electrode laminate and to overlap each of the pair of resin portions when seen in the laminating direction.

10. The power storage device according to claim 3 ,
wherein each of the pair of conductive plates is disposed to oppose each of the pair of terminal electrodes in the laminating direction of the electrode laminate and to overlap each of the pair of resin portions when seen in the laminating direction.

11. The power storage device according to claim 4 ,
wherein each of the pair of conductive plates is disposed to oppose each of the pair of terminal electrodes in the laminating direction of the electrode laminate and to overlap each of the pair of resin portions when seen in the laminating direction.

12. The power storage device according to claim 1 ,
wherein the at least one conductive plate overlaps a portion of the corresponding resin portion disposed on a surface of the corresponding terminal electrode that faces away from the electrode laminate.

13. The power storage device according to claim 1 , wherein the pair of resin portions includes a first resin portion disposed on the edge portions of the pair of terminal electrodes and a second resin portion disposed on outward facing edges of the first resin portion.

14. A power storage device, comprising:
a plurality of power storage modules; and
a plurality of stacked conductive plates, each adjacent conductive plate being stacked with one of the plurality of power storage modules interposed therebetween,
wherein each of the power storage modules has an electrode laminate including a plurality of laminated bipolar electrodes and a pair of terminal electrodes, and a sealing body configured to seal the electrode laminate,
the pair of terminal electrodes is disposed at laminate ends of the electrode laminate and each includes an electrode plate and an active material layer provided on a surface of the electrode plate that faces an inside of the electrode laminate,
the sealing body has a pair of resin portions provided at edge portions of the pair of terminal electrodes,
at least one conductive plate of each pair of adjacent conductive plates is disposed to face a corresponding terminal electrode of the pair of terminal electrodes in a laminating direction of the electrode laminate and overlap a corresponding resin portion of the pair of resin portions when seen in the laminating direction,
the at least one conductive plate directly contacts the electrode plate of the corresponding terminal electrode at a surface of the corresponding terminal electrode that faces away from the electrode laminate,
the active material layer of each terminal electrode is provided only on the surface of the electrode plate that faces the inside of the electrode laminate, and
the at least one conductive plate has a plurality of flow paths extending in a direction perpendicular to the laminating direction and configured to circulate coolant across a length of the at least one conductive plate in the direction perpendicular to the laminating direction.

15. The power storage device according to claim 14 , wherein the pair of resin portions includes a first resin portion disposed on the edge portions of the pair of terminal electrodes and a second resin portion disposed on outward facing edges of the first resin portion.

Assignees

• Toyota Jidoshokki Kk
• Toyota Motor Co Ltd

Inventors

• CHUJO Yuki
• Hirose Takayuki
• Nakamura Tomohiro
• Yamada Masahiro
• Haga Nobuyasu
• Okumura Motoyoshi
• Kikuchi Takuro

Classifications

• H01M50/184

  characterised by their shape or structure · CPC title

• H01M50/193

  Organic material · CPC title

• H01M50/552

  characterised by their shape · CPC title

• H01M50/50

  Current conducting connections for cells or batteries · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title