Non-aqueous electrolyte battery and battery pack

Patent metadata

Field	Value
Publication number	US-10305146-B2
Application number	US-201715420387-A
Country	US
Kind code	B2
Filing date	Jan 31, 2017
Priority date	Jan 14, 2015
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

A non-aqueous electrolyte battery includes a bipolar electrode and a non-aqueous electrolyte. The electrode includes positive-pole and negative-pole active material layers formed on both side surfaces of a current collector. The electrode is divided into plural parts each having a predetermined length in one direction, and is sequentially and alternately bent at every lines between the parts in opposite directions so that the parts are overlapped with each other.

First claim

The invention claimed is:

1. A non-aqueous electrolyte battery comprising:
a bipolar electrode including a current collector, a positive-pole active material layer formed on one side surface of the current collector, and a negative-pole active material layer formed on the other side surface of the current collector; and
a non-aqueous electrolyte, wherein
the bipolar electrode is divided into a plurality of parts each having a predetermined length in one direction, and is sequentially and alternately bent between the plurality of parts in opposite directions to produce bent portions so that the plurality of parts are overlapped with each other,
a position of a center of one bent portion is shifted by a predetermined constant distance, in a direction perpendicular to an overlapped direction in which the plurality of parts are overlapped with each other, from a position of a center of another bent portion neighboring the one bent portion in the overlapped direction, and
positions of centers of bent portions alternatively positioned in the overlapped direction are identical to each other in the direction perpendicular to the overlapped direction.

2. The non-aqueous electrolyte battery according to claim 1 , wherein a reaction potential of the negative-pole active material layer is 1.5 V.

3. The non-aqueous electrolyte battery according to claim 1 , wherein the current collector comprises aluminum.

4. The non-aqueous electrolyte battery according to claim 2 , wherein the positive-pole active material layer is able to occlude and discharge lithium.

5. The non-aqueous electrolyte battery according to claim 1 , wherein a current collection tab is attached to each bent portion.

6. A battery pack comprising:
non-aqueous electrolyte batteries; and
an outer member configured to store the non-aqueous electrolyte batteries, wherein
each non-aqueous electrolyte battery includes
a bipolar electrode including a current collector, a positive-pole active material layer formed on one side surface of the current collector, and a negative-pole active material layer formed on the other side surface of the current collector, and
a non-aqueous electrolyte, and

the bipolar electrode is divided into a plurality of parts each having a predetermined length in one direction, and is sequentially and alternately bent between the plurality of parts in opposite directions to produce bent portions so that the plurality of parts are overlapped with each other,
a position of a center of one bent portion is shifted by a predetermined constant distance, in a direction perpendicular to an overlapped direction in which the plurality of parts are overlapped with each other, from a position of a center of another bent portion neighboring the one bent portion in the overlapped direction, and
positions of centers of bent portions alternatively positioned in the overlapped direction are identical to each other in the direction perpendicular to the overlapped direction.

7. The battery pack according to claim 6 , wherein a reaction potential of the negative-pole active material layer is 1.5 V.

8. The battery pack according to claim 6 , wherein the current collector comprises aluminum.

9. The battery pack according to claim 7 , wherein the positive-pole active material layer is able to occlude and discharge lithium.

10. The battery pack according to claim 6 , wherein a current collection tab is attached to each bent portion.

11. The non-aqueous electrolyte battery according to claim 1 , further comprising a plurality of bipolar electrodes, each being the bipolar electrode, wherein
the plurality of bipolar electrodes are laminated on each other and provide a laminated body including the plurality of bipolar electrodes laminated on each other,
the laminated body is divided into a plurality of parts each having a predetermined length in one direction, and is sequentially and alternately bent between the plurality of parts in opposite directions to produce bent portions so that the plurality of parts are overlapped with each other,
a position of a center of one bent portion of the laminated body is shifted by a predetermined constant distance, in a direction perpendicular to an overlapped direction in which the plurality of parts of the laminated body are overlapped with each other, from a position of a center of another bent portion of the laminated body neighboring the one bent portion in the overlapped direction, and
positions of centers of bent portions of the laminated body alternatively positioned in the overlapped direction are identical to each other in the direction perpendicular to the overlapped direction.

12. The non-aqueous electrolyte battery according to claim 11 , wherein a current collection tab is attached to each bent portion.

13. The non-aqueous electrolyte battery according to claim 1 , wherein the negative-pole active material layer includes a metal composite oxide containing titanium.

14. The battery pack according to claim 6 , further comprising a plurality of bipolar electrodes, each being the bipolar electrode, wherein
the plurality of bipolar electrodes are laminated on each other and provide a laminated body including the plurality of bipolar electrodes laminated on each other,
the laminated body is divided into a plurality of parts each having a predetermined length in one direction, and is sequentially and alternately bent between the plurality of parts in opposite directions to produce bent portions so that the plurality of parts are overlapped with each other,
a position of a center of one bent portion of the laminated body is shifted by a predetermined constant distance, in a direction perpendicular to an overlapped direction in which the plurality of parts of the laminated body are overlapped with each other, from a position of a center of another bent portion of the laminated body neighboring the one bent portion in the overlapped direction, and
positions of centers of bent portions of the laminated body alternatively positioned in the overlapped direction are identical to each other in the direction perpendicular to the overlapped direction.

15. The battery pack according to claim 14 , wherein a current collection tab is attached to each bent portion.

16. The battery pack according to claim 6 , wherein the negative-pole active material layer includes a metal composite oxide containing titanium.

Assignees

• Toshiba Kk

Inventors

• Yoshima Kazuomi
• Harada Yasuhiro
• Takami Norio

Classifications

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• H01M2004/029

  Bipolar electrodes · CPC title