Assembled battery

Patent metadata

Field	Value
Publication number	US-11777177-B2
Application number	US-201916968462-A
Country	US
Kind code	B2
Filing date	Feb 14, 2019
Priority date	Feb 15, 2018
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

Provided is an assembled battery in which a large number of flat batteries can be stacked easily. An assembled battery 1 includes stacked multiple flat batteries A, B, and C in the shape of an N-sided polygon (N is an integer of 3 or more). Each of the multiple flat batteries A, B, and C in the shape of the N-sided polygon has a positive-electrode terminal 21 a and a negative-electrode terminal 61 a that extend in different directions having 360°/N in between, and the multiple flat batteries A, B, and C are electrically connected in series. The assembled battery 1 also includes multiple N-sided polygonal separating films 71 and 72 disposed between each pair of adjacent ones of the stacked multiple flat batteries A, B, and C to insulate the flat batteries from one another.

First claim

The invention claimed is:

1. An assembled battery comprising
stacked N flat batteries, N being an integer of 3 or more, wherein
each of the flat batteries has a positive-electrode terminal and a negative-electrode terminal having an angle of 360°/N in between, and
the N flat batteries are electrically connected in series so that when the stacked N flat batteries are horizontally disposed, the positive-electrode terminal of a first flat battery and the negative-electrode terminal of a last flat battery of the stacked N flat batteries are vertically overlapping and are in parallel alignment.

2. The assembled battery according to claim 1 , wherein
the flat battery is N-sided polygonal, and
the positive-electrode terminal and the negative-electrode terminal extend from different sides of the flat battery.

3. The assembled battery according to claim 1 , comprising
separating films each disposed between each pair of adjacent ones of the N flat batteries to separate the pair of adjacent flat batteries.

4. The assembled battery according to claim 3 , wherein
one of the separating films has an insulating portion that is associated with a positive-electrode terminal of one flat battery of the stacked assembled battery, that has a width larger than the width of the positive-electrode terminal, and that extends outward.

5. The assembled battery according to claim 1 , wherein
a positive electrode and a negative electrode of each flat battery has a planar shape of a regular N-sided polygon.

6. The assembled battery according to claim 3 , comprising
an exterior film bounding the stacked N flat batteries, wherein
the exterior film and the separating films each have a hole extending therethrough.

7. The assembled battery according to claim 6 , comprising
a sealing seal that covers the hole of the exterior film, wherein
when the sealing seal is peeled off, air flows in through the hole, and the assembled battery starts electrical discharge.

8. The assembled battery according to claim 6 , wherein
when an electrolytic solution or a solvent is put in through the hole, the assembled battery starts electrical discharge.

9. The assembled battery according to claim 3 , wherein one of the separating films has an insulating portion that projects between the positive-electrode terminal of the first flat battery and the negative-electrode terminal of the last flat battery so as to separate the positive-electrode terminal of the first flat battery from the negative-electrode terminal of the last flat battery.

10. The assembled battery according to claim 9 , wherein the insulation portion of the one of the separating films has a width larger than a width of the positive-electrode terminal.

11. The assembled battery according to claim 1 , wherein the stacked N flat batteries are disposed between opposing sheets of film that are bound together, at least one of the opposing sheets of film having a linear cut-line markings formed thereon.

12. The assembled battery according to claim 11 , wherein each N flat battery comprises:
a separator;
a negative electrode current collector;
a negative electrode disposed between the separator and the negative electrode current collector;
a positive electrode current collector; and
a positive electrode disposed between the separator and the positive electrode current collector, the positive electrode and the negative electrode being disposed on opposing sides of the separator,
wherein the linear cut-line marking inwardly extends from a perimeter edge of the at least one of the opposing sheets of film but does not overlay the separator.

13. The assembled battery according to claim 11 , wherein each N flat battery comprises:
a separator;
a negative electrode current collector;
a negative electrode disposed between the separator and the negative electrode current collector;
a positive electrode current collector; and
a positive electrode disposed between the separator and the positive electrode current collector, the positive electrode and the negative electrode being disposed on opposing sides of the separator,
wherein the linear cut-line marking inwardly extends from a perimeter edge of the at least one of the opposing sheets of film and overlays at least a portion the separator.

14. The assembled battery according to claim 6 , wherein each N flat battery comprises:
a separator;
a negative electrode current collector;
a negative electrode disposed between the separator and the negative electrode current collector;
a positive electrode current collector; and
a positive electrode disposed between the separator and the positive electrode current collector, the positive electrode and the negative electrode being disposed on opposing sides of the separator,
wherein each hole extending through the separating films is positioned so that each hole does not overly the separators but is disposed outwardly away from each separator.

15. The assembled battery according to claim 1 , wherein each N flat battery comprises:
a separator;
a negative electrode current collector;
a negative electrode disposed between the separator and the negative electrode current collector;
a positive electrode current collector; and
a positive electrode disposed between the separator and the positive electrode current collector, the positive electrode and the negative electrode being disposed on opposing sides of the separator, the positive electrode having an inside face facing the separator and an opposing outside face,
wherein the positive electrode current collector comprises:
a body overlaying the outside face of the positive electrode, the body having a polygonal shape with opposing side faces that extend to an encircling perimeter edge, the perimeter edge being comprised of a plurality of interconnected linear side edges each having a length; and
the positive-electrode terminal outwardly projecting from a select one of the linear side edges of the body, the positive-electrode terminal having a width extending along the select linear side edge that is shorter than the length of the select linear side edge.

16. The assembled battery according to claim 15 , wherein the separator, negative electrode, the positive electrode, and the body of the positive electrode current collector each have the same polygonal shape.

17. The assembled battery according to claim 15 , wherein the body of the positive electrode current collector completely covers the outside face of the positive electrode.

18. The assembled battery according to claim 3 , wherein one of the separating films comprises:
a body having a polygonal shape with opposing side faces that extend to an encircling perimeter edge, the perimeter edge being comprised of a plurality of interconnected linear side edges each having a length; and
an insulating portion outwardly projecting from a select one of the linear side edges of the body, the insulating portion having a width extending along the select linear side edge that is shorter than the length of the select linear side edge.

19. The assembled battery according to claim 18 , wherein each N flat battery comprises:
a separator;
a negative electrode current collector;
a negative electrode disposed between the separator and the negative electrode current collector;
a positive electrode current collector; and
a positive electrode disposed between the separator and the positive electrode current collector, the positive electrode and the negative electrode being disposed on opposing sides of the

Assignees

• Nippon Telegraph & Telephone

Inventors

• Nohara Masaya
• Iwata Mikayo
• Hayashi Masahiko
• Komatsu Takeshi

Classifications

• H01M50/50 Primary

  Current conducting connections for cells or batteries · CPC title

• H01M50/103

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• H01M50/291

  characterised by their shape · CPC title

• H01M50/548

  on opposite sides of the cell · CPC title