Laminated battery

Patent metadata

Field	Value
Publication number	US-2019334155-A1
Application number	US-201716474535-A
Country	US
Kind code	A1
Filing date	Nov 21, 2017
Priority date	Dec 27, 2016
Publication date	Oct 31, 2019
Grant date	—

Abstract

A laminated battery according to the present invention is a secondary battery where a first sheet battery, a second sheet battery, a third sheet battery, and a fourth sheet battery are laminated in this order. When an X-Y plane is viewed from above, a tab part of the first sheet battery is placed projecting outward of the sheet battery, and a tab part of the fourth sheet battery is placed projecting outward of the third sheet battery. A second electrode on a surface of the first tab part and a second electrode on a surface of the fourth tab part tab part, are placed face-to-face with each other and connected.

First claim

1 . A secondary battery in which a plurality of sheet batteries are laminated, comprising:
a first sheet battery, a second sheet battery, a third sheet battery and a fourth sheet battery, each including a first electrode on a front side surface and a second electrode on a back side surface, wherein when viewed from above in a state where the first sheet battery, the second sheet battery, the third sheet battery and the fourth sheet battery are laminated, the first sheet battery includes a first tab part placed so as to project outward of the second sheet battery, and the second sheet battery includes a second tab part placed so as to project outward of the first sheet battery in a state where the second electrode of the first sheet battery and the second electrode of the second sheet battery are placed face-to-face to each other, the third sheet battery includes a third tab part placed so as to project outward of the fourth sheet battery, and the fourth sheet battery includes a fourth tab part placed so as to project outward of the third sheet battery in a state where the second electrode of the third sheet battery and the second electrode of the fourth sheet battery are placed face-to-face to each other, and the first tab part and the fourth tab part overlap each other so that the second electrode on the surface of the first tab part and the second electrode on the surface of the fourth tab part are placed face-to-face to each other.

2 . The laminated battery according to claim 1 , wherein the second electrode on the surface of the first tab part and the second electrode on the surface of the fourth tab part are connected through a conductive bonding agent.

3 . The laminated battery according to claim 2 , wherein a thickness of the conductive bonding agent is equal to a total thickness of the second sheet battery and the third sheet battery.

4 . The laminated battery according to claim 1 , wherein the first to fourth sheet batteries are laminated and folded without folding the first tab part, the second tab part, the third tab part and the fourth tab part.

5 . The laminated battery according to claim 1 , wherein
each of the first sheet battery, the second sheet battery, the third sheet battery and the fourth sheet battery includes a base material serving as the first electrode, and peripheral parts of the base materials of the first sheet battery, the second sheet battery, the third sheet battery and the fourth sheet battery are bonded together.

6 . The laminated battery according to claim 1 , wherein the second tab part and the third tab part are placed so as to overlap each other when viewed from above in a state where the first to fourth sheet batteries are laminated.

7 . The laminated battery according to claim 1 , further comprising:
a fifth sheet battery and a sixth sheet battery, each including a first electrode on a front side surface and a second electrode on a back side surface, wherein when viewed from above in a state where the first to sixth sheet batteries are laminated, the fifth sheet battery includes a fifth tab part placed so as to project outward of the sixth sheet battery, and the sixth sheet battery includes a sixth tab part placed so as to project outward of the fifth sheet battery in a state where the second electrode of the fifth sheet battery and the second electrode of the sixth sheet battery are placed face-to-face to each other, and the third tab part and the sixth tab part overlap each other so that the second electrode on the surface of the third tab part and the second electrode on the surface of the sixth tab part are placed face-to-face to each other and connected.

8 . The laminated battery according to claim 7 , wherein the second electrode on the surface of the third tab part and the second electrode on the surface of the sixth tab part are connected through a conductive bonding agent.

9 . The laminated battery according to claim 1 , wherein the first electrode of the second sheet battery and the first electrode of the third sheet battery are placed face-to-face to each other and connected.

10 . The laminated battery according to claim 9 , wherein
a first insulating material is formed on the first sheet battery, a second insulating material is formed on the second sheet battery, a third insulating material is formed on the third sheet battery, a fourth insulating material is formed on the fourth sheet battery, the first insulating material is formed in close proximity to the second tab part, the second insulating material is formed in close proximity to the first tab part, the third insulating material is formed in close proximity to the fourth tab part, and the fourth insulating material is formed in close proximity to the third tab part.

11 . The laminated battery according to claim 1 , wherein
the first to fourth sheet batteries include rectangular parts placed so as to overlap each other when viewed from above in a state where the first to fourth sheet batteries are laminated, and the first to fourth tab parts project outward from one side of the rectangular parts.

12 . The laminated battery according to claim 1 , wherein
the first to fourth sheet batteries include rectangular parts placed so as to overlap each other when viewed from above in a state where the first to fourth sheet batteries are laminated, the first tab part and the fourth tab part project outward from a first side of the rectangular parts, and the second tab part and the third tab part project outward from a second side opposed to the first side.

13 . The laminated battery according to claim 1 , wherein
each of the first to fourth sheet batteries includes a base material serving as the first electrode, the second electrode is formed on both surfaces of the base material, and the second electrode of the second sheet battery and the second electrode of the third sheet battery are placed face-to-face to each other and connected.

Assignees

• Nihon Micronics Kk

Inventors

• Sano Masami
• Ueki Isao
• Igarashi Masayuki

Classifications

• H01M10/0413 Primary

  Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes · CPC title

• H01M10/0585 Primary

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

• H01M10/0436

  Small-sized flat cells or batteries for portable equipment · CPC title

• H01M2/266 Primary

  Electricity · mapped topic

• H01M2/30

  Electricity · mapped topic