Air cell

Patent metadata

Field	Value
Publication number	US-10923748-B2
Application number	US-201916592150-A
Country	US
Kind code	B2
Filing date	Oct 3, 2019
Priority date	Apr 4, 2012
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

An air cell includes a plurality of electrode structures each including a filling chamber for an electrolyte liquid interposed between an air electrode and a metal negative electrode; an electrode housing portion individually housing the plural electrode structures; and a liquid supply unit which supplies the electrolyte liquid to the plural electrode structures. The electrode housing portion includes a plurality of liquid injection holes to inject the electrolyte liquid into the filling chambers of the respective electrode structures and a plurality of liquid junction prevention portions each dividing a space between the liquid injection holes adjacent to each other. The liquid supply unit includes a liquid injection device allowing the electrolyte liquid to flow into the plural liquid injection holes.

First claim

We claim:

1. An air cell comprising:
a first electrode structure including a first filling chamber for electrolyte liquid interposed between a first air electrode and a first metal negative electrode;
a second electrode structure including a second filling chamber for the electrolyte liquid interposed between a second air electrode and a second metal negative electrode;
an electrode housing portion individually housing the first electrode structure and the second electrode structure adjacent to one another;
a liquid supply unit that supplies the electrolyte liquid from a storage tank to the first and second electrode structures via a liquid injection device,
wherein a liquid junction prevention portion, a first liquid injection hole, and a second liquid injection hole are directly provided on an upper surface of the electrode housing portion;
wherein the first liquid injection hole is associated with the first electrode structure to inject the electrolyte liquid into the first filling chamber of the first electrode structure;
wherein the second liquid injection hole is associated with the second electrode structure to inject the electrolyte liquid into the second filling chamber of the second electrode structure;
wherein the liquid junction prevention portion divides a first space between the first liquid injection hole and the liquid injection device and a second space between the second liquid injection hole and the liquid injection device,
wherein the liquid injection device is separated from each of the first liquid injection hole and the second liquid injection hole by an empty space, and there is no structure interposed between the liquid injection device and the first liquid injection hole and between the liquid injection device and the second liquid injection hole,
wherein the electrode housing portion is connected to the first filling chamber via the first liquid injection hole, and the electrode housing portion is connected to the second filling chamber via the second liquid injection hole, and
wherein the liquid junction prevention portion protrudes upward from the upper surface of the electrode housing portion.

2. The air cell according to claim 1 , wherein two additional liquid junction prevention portions are located towards arrangement end portions of the electrode housing portion to direct the electrolyte liquid into third and fourth filling chambers of third and fourth electrode structures, respectively, the third and fourth electrode structures located at the arrangement end portions.

3. The air cell according to claim 1 , wherein the liquid junction prevention portion has a protruding structure.

4. The air cell according to claim 3 , wherein the liquid junction prevention portion has a surface inclined downward toward the first liquid injection hole adjacent thereto.

5. The air cell according to claim 4 , wherein the liquid junction prevention portion has a triangular cross-section.

6. The air cell according to claim 4 , wherein the liquid junction prevention portion has a trapezoidal cross-section.

7. The air cell according to claim 3 , wherein the liquid junction prevention portion has a downward step towards the first liquid injection hole adjacent thereto.

8. The air cell according to claim 3 , wherein the liquid junction prevention portion has a concave curved surface inclined downward toward the first liquid injection hole adjacent thereto.

9. The air cell according to claim 3 , wherein the liquid junction prevention portion has a convex curved surface inclined downward toward the first liquid injection hole adjacent thereto.

10. The air cell according to claim 3 , wherein the liquid junction prevention portion includes plural projections arranged at predetermined intervals in an arrangement direction of the first and second electrode structures.

11. The air cell according to claim 10 , wherein the plural projections have a common height.

12. The air cell according to claim 10 , wherein the plural projections have different heights.

13. The air cell according to claim 1 , wherein the liquid injection device includes a switching body which controls a flow of the electrolyte liquid.

14. The air cell according to claim 1 , wherein the liquid injection device is placed to allow the electrolyte liquid to concurrently flow into the first and second liquid injection holes.

15. The air cell according to claim 1 , wherein at least a peripheral surface of the liquid injection device has water repellency.

16. The air cell according to claim 3 , wherein a top surface of the liquid junction prevention portion has water repellency.

17. The air cell according to claim 1 , wherein a periphery of an opening of the first liquid injection hole is a hydrophilic region having hydrophilicity.

18. The air cell according to claim 17 , wherein an outer side of the periphery of the opening of the first liquid injection hole has a water-repellent region having water repellency.

19. An air cell comprising:
a first electrode structure including a first filling chamber for electrolyte liquid interposed between a first air electrode and a first metal negative electrode;
a second electrode structure including a second filling chamber for the electrolyte liquid interposed between a second air electrode and a second metal negative electrode;
an electrode housing portion individually housing the first and second electrode structures adjacent to one another;
a liquid supply unit that supplies the electrolyte liquid from a storage tank to the first and second electrode structures via a liquid injection device,
wherein a liquid junction prevention portion, a first liquid injection hole, and a second liquid injection hole are directly provided on an upper surface of the electrode housing portion;
wherein the first liquid injection hole is associated with the first electrode structure to inject the electrolyte liquid into the first filling chamber of the first electrode structure;
wherein the second liquid injection hole is associated with the second electrode structure to inject the electrolyte into the second filling chamber of the second electrode structure;
wherein the liquid injection device is separated from the first liquid injection hole and the second liquid injection hole and there is no structure intervening between the liquid injection device and the first liquid injection hole and between the liquid injection device and the second liquid injection hole,
wherein the electrode housing portion is connected to the first filling chamber via the first liquid injection hole, and the electrode housing portion is connected to the second filling chamber via the second liquid injection hole, and
wherein the liquid junction prevention portion protrudes upward from the upper surface of the electrode housing portion.

Assignees

• Nissan Motor

Inventors

• Tsukada Yoshiko
• Nagayama Mori
• Miyazawa Atsushi

Classifications

• H01M50/627

  Filling ports · CPC title

• H01M12/065

  with plate-like electrodes or stacks of plate-like electrodes · CPC title

• H01M12/06 Primary

  with one metallic and one gaseous electrode · CPC title

• H01M12/02

  Details (of electrodes H01M4/00; of non-active parts H01M50/00) · CPC title

• H01M12/08

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title