Secondary battery

Patent metadata

Field	Value
Publication number	US-2018241026-A1
Application number	US-201615753457-A
Country	US
Kind code	A1
Filing date	Jul 14, 2016
Priority date	Sep 9, 2015
Publication date	Aug 23, 2018
Grant date	—

Abstract

A secondary battery includes at least: a laminated electrode body 20 in which an electrode member 21 and a separator 26 are laminated, in which a suppressing member 31A suppressing a movement of the separator 26 with respect to the electrode member 21 is disposed between a portion 21A of the electrode member 21 and a portion of the separator 26, in an uneven portion 27A existing in the laminated electrode body 20.

First claim

1 . A secondary battery, comprising at least:
a laminated electrode body in which an electrode member and a separator are laminated, wherein a suppressing member suppressing a movement of the separator with respect to the electrode member is disposed between a portion of the electrode member and a portion of the separator, in an uneven portion existing in the laminated electrode body.

2 . The secondary battery according to claim 1 ,
wherein the suppressing member includes a tape-like base material, and an adhesive layer disposed on one surface of the base material, and the suppressing member adheres to the laminated electrode body through the adhesive layer.

3 . The secondary battery according to claim 2 , further comprising:
an electrolytic solution, wherein the other surface of the base material exhibits pressure-sensitive adhesiveness by being in contact with the electrolytic solution, and the other surface of the base material pressure-sensitively adheres to the separator.

4 . The secondary battery according to claim 2 , further comprising:
an electrolytic solution, wherein the other surface of the base material swells by being in contact with the electrolytic solution, and the other surface of the base material coheres to the separator.

5 . The secondary battery according to claim 1 , further comprising:
a laminated electrode body storage member, wherein a strip-like laminated electrode body is stored in the laminated electrode body storage member in a wound state.

6 . The secondary battery according to claim 5 ,
wherein an outer shape of the laminated electrode body storage member is a cylindrical shape or a square shape.

7 . The secondary battery according to claim 1 , further comprising:
a lead portion attached to the laminated electrode body, wherein the lead portion is included in the uneven portion, and the suppressing member is disposed between the portion of the electrode member and the lead portion, and the portion of the separator, in the uneven portion.

8 . The secondary battery according to claim 1 , further comprising:
a lead portion attached to the laminated electrode body, wherein the uneven portion is positioned in the vicinity of the portion of the electrode member to which the lead portion is attached.

9 . The secondary battery according to claim 1 , further comprising:
a lead portion attached to the laminated electrode body, wherein the lead portion includes a positive electrode lead portion attached to a positive electrode current collector and a negative electrode lead portion attached to a negative electrode current collector.

10 . The secondary battery according to claim 1 ,
wherein in the laminated electrode body, a positive electrode member in which a positive electrode active material layer is formed on a positive electrode current collector, and a negative electrode member in which a negative electrode active material layer is formed on a negative electrode current collector, are laminated through the separator.

11 . The secondary battery according to claim 5 ,
wherein an end portion of the laminated electrode body is included in the uneven portion.

12 . The secondary battery according to claim 1 ,
wherein in the laminated electrode body, a positive electrode member in which a positive electrode active material layer is formed on a positive electrode current collector, and a negative electrode member in which a negative electrode active material layer is formed on a negative electrode current collector, are laminated through the separator, the laminated electrode body further includes a lead portion including a positive electrode lead portion attached to the positive electrode current collector and a negative electrode lead portion attached to the negative electrode current collector, and a laminated electrode body storage member, the laminated electrode body is stored in the laminated electrode body storage member in a wound state, the positive electrode lead portion is attached to a portion of the positive electrode current collector positioned by being separated from an end portion of the positive electrode member, and the suppressing member is disposed between the positive electrode lead portion, the portion of the positive electrode current collector positioned in the vicinity of the positive electrode lead portion, and a portion of the positive electrode active material layer adjacent to the portion of the positive electrode current collector positioned in the vicinity of the positive electrode lead portion, and the separator.

13 . The secondary battery according to claim 1 ,
wherein in the laminated electrode body, a positive electrode member in which a positive electrode active material layer is formed on a positive electrode current collector, a negative electrode member in which a negative electrode active material layer is formed on a negative electrode current collector, are laminated through the separator, the laminated electrode body further includes a lead portion including a positive electrode lead portion attached to the positive electrode current collector and a negative electrode lead portion attached to the negative electrode current collector, and a laminated electrode body storage member, the laminated electrode body is stored in the laminated electrode body storage member in a wound state, an end portion of the laminated electrode body includes an end portion of the negative electrode current collector, and when a direction separated from the end portion of the laminated electrode body is set to an inside direction, an end portion of the negative electrode active material layer is disposed by being separated from the end portion of the negative electrode current collector in the inside direction, an end portion of the positive electrode active material layer and an end portion of the positive electrode current collector are disposed by being separated from the end portion of the negative electrode active material layer in the inside direction, the negative electrode lead portion is attached in the vicinity of the end portion of the negative electrode current collector, and the suppressing member is disposed between a region between the negative electrode lead portion and the end portion of the negative electrode active material layer, and the separator.

Assignees

• Murata Manufacturing Co

Inventors

• Shibutani Koji
• Matsui Takaaki

Classifications

• H01M10/0587 Primary

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

• H01M10/0585

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

• H01M10/05

  Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) · CPC title

• H01M10/0468

  Compression means for stacks of electrodes and separators · CPC title

• H01M50/595

  Tapes · CPC title