Power storage device

Patent metadata

Field	Value
Publication number	US-11715843-B2
Application number	US-202117150101-A
Country	US
Kind code	B2
Filing date	Jan 15, 2021
Priority date	Jan 24, 2020
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

A power storage device includes a power storage module, a conductive plate, and a sealing member. The power storage module includes an electrode laminate and a sealing body. The sealing body includes a plurality of resin portions. Metal plates at laminate ends of the electrode laminate each have an exposed surface exposed from the resin portion. The exposed surface includes a contact region and a non-contact region. The sealing member includes a first sealing portion. The first sealing portion is provided along an inner edge of the resin portion to be in contact with the resin portion. The first sealing portion adheres to the conductive plate and the non-contact region and fills a portion between the conductive plate and the non-contact region. The first sealing portion seals a portion between the conductive plate and the exposed surface.

First claim

What is claimed is:

1. A power storage device comprising:
a power storage module;
a conductive plate disposed to be laminated with the power storage module; and
a sealing member provided between the conductive plate and the power storage module,
wherein the power storage module includes an electrode laminate including a plurality of laminated metal plates and a sealing body that is provided to surround a side surface of the electrode laminate, forms an internal space between electrodes adjacent to each other, and seals the internal space,
the plurality of metal plates includes a metal plate of a negative terminal electrode, a metal plate of a positive terminal electrode, and metal plates of a plurality of bipolar electrodes provided between the negative terminal electrode and the positive terminal electrode,
the sealing body includes a plurality of resin portions each having a frame shape and provided at individual edge portions of the plurality of metal plates included in the electrode laminate,
metal plates at laminate ends of the electrode laminate each have an exposed surface exposed from the resin portion,
the exposed surface includes a contact region in contact with the conductive plate and a non-contact region not in contact with the conductive plate, and
the sealing member includes a first sealing portion that is provided along an inner edge of the resin portion to be in contact with the resin portion, adheres to the conductive plate and the non-contact region, fills a portion between the conductive plate and the non-contact region, and seals a portion between the conductive plate and the exposed surface.

2. The power storage device according to claim 1 ,
wherein the conductive plate includes a plurality of plate members coupled to each other, and
the sealing member includes a second sealing portion that is provided along a coupling portion formed between the plate members adjacent to each other, adheres to each of the plate members adjacent to each other and the non-contact region, fills a portion between each of the plate members adjacent to each other and the non-contact region, and seals the portion between the conductive plate and the exposed surface.

3. The power storage device according to claim 2 ,
wherein the conductive plate includes a first surface and a second surface in a laminating direction of the electrode laminate, and
the second sealing portion fills a portion between the plate members adjacent to each other and is continuously provided from the first surface to the second surface.

4. The power storage device according to claim 2 ,
wherein, at an end portion of the coupling portion in a laminating direction of the electrode laminate, an interval between the plate members adjacent to each other becomes wide as the plate members approach the metal plate at the laminate end.

5. The power storage device according to claim 3 ,
wherein, at an end portion of the coupling portion in a laminating direction of the electrode laminate, an interval between the plate members adjacent to each other becomes wide as the plate members approach the metal plate at the laminate end.

6. The power storage device according to claim 1 ,
wherein the sealing member is a liquid-form gasket.

7. The power storage device according to claim 2 ,
wherein the sealing member is a liquid-form gasket.

8. The power storage device according to claim 3 ,
wherein the sealing member is a liquid-form gasket.

9. The power storage device according to claim 4 ,
wherein the sealing member is a liquid-form gasket.

10. The power storage device according to claim 5 ,
wherein the sealing member is a liquid-form gasket.

11. The power storage device according to claim 1 ,
wherein the resin portion overlaps an outer edge of the conductive plate when seen in a laminating direction of the electrode laminate.

12. The power storage device according to claim 2 ,
wherein the resin portion overlaps an outer edge of the conductive plate when seen in a laminating direction of the electrode laminate.

13. The power storage device according to claim 3 ,
wherein the resin portion overlaps an outer edge of the conductive plate when seen in a laminating direction of the electrode laminate.

14. The power storage device according to claim 4 ,
wherein the resin portion overlaps an outer edge of the conductive plate when seen in a laminating direction of the electrode laminate.

15. The power storage device according to claim 5 ,
wherein the resin portion overlaps an outer edge of the conductive plate when seen in a laminating direction of the electrode laminate.

16. The power storage device according to claim 6 ,
wherein the resin portion overlaps an outer edge of the conductive plate when seen in a laminating direction of the electrode laminate.

17. The power storage device according to claim 7 ,
wherein the resin portion overlaps an outer edge of the conductive plate when seen in a laminating direction of the electrode laminate.

18. The power storage device according to claim 9 ,
wherein the resin portion overlaps an outer edge of the conductive plate when seen in a laminating direction of the electrode laminate.

19. The power storage device according to claim 1 , further comprising:
a detecting element coupled to an end surface of the conductive plate,
wherein the first sealing portion extends from the inner edge to a position corresponding to a coupling portion formed between the detecting element and the conductive plate in the metal plate at the laminate end.

20. A power storage device comprising:
a power storage module;
a conductive plate disposed to be laminated with the power storage module; and
a sealing member provided between the conductive plate and the power storage module,
wherein the power storage module includes an electrode laminate including a plurality of laminated metal plates and a sealing body that is provided to surround a side surface of the electrode laminate, forms an internal space between electrodes adjacent to each other, and seals the internal space,
the plurality of metal plates includes a metal plate of a negative terminal electrode, a metal plate of a positive terminal electrode, and metal plates of a plurality of bipolar electrodes provided between the negative terminal electrode and the positive terminal electrode,
the sealing body includes a plurality of resin portions each having a frame shape and provided at individual edge portions of the plurality of metal plates included in the electrode laminate,
metal plates at laminate ends of the electrode laminate each have an exposed surface exposed from the resin portion,
the exposed surface includes a contact region in contact with the conductive plate and a non-contact region not in contact with the conductive plate, wherein the non-contact region is (i) spaced apart from the conductive plate and (ii) faces the conductive plate, in the laminating direction of the electrode laminate, and
the sealing member includes a first sealing portion that is provided along an inner edge of the resin portion to be in contact with the inner edge of the resin portion, adheres to the conductive plate and the non-contact region, fills a portion between the conductive plate and the non-contact region, and seals a portion between the conductive plate and the exposed surface.

Assignees

• Toyota Jidoshokki Kk
• Toyota Motor Co Ltd

Inventors

• Hamaoka Satoshi
• Inoue Taku
• Mune Shimpei
• Ueda Hiromi
• Iida Junichi
• Morioka Satoshi
• Okumura Motoyoshi

Classifications

• H01M10/0418 Primary

  with bipolar electrodes · CPC title

• H01M4/66

  Selection of materials · CPC title

• H01M4/70

  characterised by shape or form · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M50/183

  Sealing members · CPC title