Electrode plate, layered electrode group, and battery

Patent metadata

Field	Value
Publication number	US-2017084945-A1
Application number	US-201615275691-A
Country	US
Kind code	A1
Filing date	Sep 26, 2016
Priority date	Aug 2, 2011
Publication date	Mar 23, 2017
Grant date	—

Abstract

A layered electrode group according to the present invention includes a positive electrode plate, a negative electrode plate, and a separator. The positive electrode plate is formed into a substantial U-shape by disposing two active material retaining portions retaining the positive active material opposite to each other. The negative electrode plate is formed into a substantial U-shape by disposing two active material retaining portions retaining the negative active material opposite to each other. The positive electrode plate and the negative electrode plate are layered such that at least one active material retaining portion at the positive electrode plate is sandwiched between two active material retaining portions at the negative electrode plate.

First claim

1 - 9 . (canceled)

10 . A cylindrical battery comprising a layered electrode group in a cylindrical battery case, the layered electrode group comprising:
a positive electrode plate retaining a positive active material in a positive electrode current collector; a negative electrode plate retaining a negative active material in a negative electrode current collector; and a separator interposed between the positive electrode plate and the negative electrode plate, wherein the positive electrode plate is formed into a substantial U-shape by disposing two active material retaining portions retaining the positive active material opposite to each other, the negative electrode plate is formed into a substantial U-shape by disposing two active material retaining portions retaining the negative active material opposite to each other, and the positive electrode plate and the negative electrode plate are layered into a substantially rectangular parallelepiped shape such that at least one active material retaining portion of either one of the positive electrode plate and the negative electrode plate is sandwiched between two active material retaining portions of the other one of the positive electrode plate and the negative electrode plate.

11 . A manufacturing method for the cylindrical battery according to claim 10 , the method comprising:
a negative electrode plate folding step of folding a negative electrode plate in a developed state in a substantial U-shape to sandwich two active material retaining portions disposed at a positive electrode plate in a developed state between the folded negative electrode plate; and a positive electrode plate folding step of folding the positive electrode plate whose two active material retaining portions are sandwiched in the folded negative electrode plate in a substantial U-shape.

12 . The manufacturing method for the cylindrical battery according to claim 11 , further comprising a separator containing step of surrounding the positive electrode plate with a separator to sandwich both surfaces of the positive electrode plate in the developed state before the negative electrode plate folding step.

13 . A cylindrical battery comprising an electrode plate formed into a substantial U-shape, in which two active material retaining portions retaining an active material in a current collector are disposed opposite to each other,
wherein a current collecting terminal extends along a folding line of a folded portion formed between the two active material retaining portions from the folded portion.

14 . The cylindrical battery according to claim 13 , wherein the electrode plate is sandwiched at both surfaces thereof by a separator folded in half in a developed state.

15 . The cylindrical battery according to claim 13 ,
wherein the electrode plate is a first electrode plate, the cylindrical batter further comprises a second electrode plate configured to have a different polarity from that of the first electrode plate, in which a current collector is coated or filled with an active material, the second electrode plate includes a linear non-coated part that is not coated or filled with an active material and coated parts that are formed on both sides while sandwiching the non-coated part therebetween and are coated or filled with the active material, the current collector is folded at the non-coated part such that the coated parts on both sides face each other, and further, a part of the non-coated part is folded outward, thus forming a current collecting terminal, and the first electrode plate is sandwiched between the coated parts on both sides of the second electrode plate.

16 . The cylindrical battery according to claim 13 ,
wherein the electrode plate is configured to allow the current collector, which is substantially rectangular, to retain the active material, the electrode plate comprises:
an active material non-retaining portion that is substantially linearly formed and does not retain any active material;
active material retaining portions that are formed on both sides while sandwiching the active material non-retaining portion therebetween and retain the active material; and
a current collecting terminal disposed at the active material non-retaining portion,
the current collector is folded in a substantial U-shape at the active material non-retaining portion such that the active material retaining portions on both sides face each other, and the current collecting terminal extends outward along the folding line of the folded portion formed between the two active material retaining portions from the folded portion.

17 . The cylindrical battery according to claim 16 , wherein the current collector is made of a three-dimensional metallic porous substrate.

18 . A cylindrical battery comprising an electrode plate, the electrode plate comprising:
two active material retaining plates that retain an active material in a current collector; and a current collecting terminal for connecting the two active material retaining plates to each other, wherein the current collecting terminal is folded in a substantial U-shape such that the two active material retaining plates face each other, and the current collecting terminal has an extension portion extending outward along a folding line of a folded portion.

19 . The cylindrical battery according to claim 18 , wherein the current collecting terminal is a flat plate formed into a T-shape, as viewed on a plane.

20 . The cylindrical battery according to claim 18 , wherein the folded portion of the separator is located on a side edge other than a side edge on which a current collecting terminal at the electrode plate extends outward.

21 . The cylindrical battery according to claim 10 , wherein a folded portion formed between the two active material retaining portions at the positive electrode plate and a folded portion formed between the two active material retaining portions at the negative electrode plate face each other in stacking.

22 . The cylindrical battery according to claim 10 , wherein the positive electrode plates and the negative electrode plates are layered such that one active material retaining portion at each of the two positive electrode plates adjacent to each other is sandwiched between the two active material retaining portions facing each other at one of the negative electrode plates.

23 . The cylindrical battery according to claim 10 , wherein the positive electrode plates and the negative electrode plates are layered such that one active material retaining portion at each of the two negative electrode plates adjacent to each other is sandwiched between the two active material retaining portions facing each other at one of the positive electrode plates.

24 . The cylindrical battery according to claim 10 , wherein the separator is folded in half to sandwich both surfaces of the positive electrode plate or the negative electrode plate in a state in which the positive electrode plate or the negative electrode plate is developed.

25 . The cylindrical battery according to claim 10 , wherein the positive electrode plate or the negative electrode plate has a current collecting terminal extending from a folded portion formed between the two active material retaining portions outward along a folding line of the folded portion.

26 . The cylindrical battery according to claim 25 , wherein in the positive electrode plate or the negative electrode plate having the current collecting terminal extending from the folded portion,
the separator is dispos

Assignees

• Gs Yuasa Int Ltd

Inventors

• Kanemoto Manabu
• Kakeya Tadashi
• Kodama Mitsuhiro

Classifications

• Y10T29/49108

  Electric battery cell making · CPC title

• H01M10/0422

  Cells or battery with cylindrical casing · CPC title

• H01M10/0431

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• H01M10/0459

  Cells or batteries with folded separator between plate-like electrodes · CPC title

• H01M4/80

  Porous plates, e.g. sintered carriers · CPC title