Secondary battery

Patent metadata

Field	Value
Publication number	US-2021399348-A1
Application number	US-201917279592-A
Country	US
Kind code	A1
Filing date	Aug 30, 2019
Priority date	Sep 28, 2018
Publication date	Dec 23, 2021
Grant date	—

Abstract

A secondary battery according to an embodiment includes a container, an electrolytic solution, a cathode and an anode, and a flow mechanism. The container includes an opening on a bottom surface thereof. The electrolytic solution is disposed in the container. The cathode and the anode are disposed in the electrolytic solution. The flow mechanism includes a generation part that is connected to the container via the opening and generates a gas bubble(s) in the container through the opening, and that causes the electrolytic solution to flow. A protrusion part that is positioned at an edge part of the opening and extends in upward and downward directions is disposed on the bottom surface.

First claim

1 . A secondary battery, comprising:
a container that includes an opening on a bottom surface thereof; an electrolytic solution that is disposed in the container; a cathode and an anode that are disposed in the electrolytic solution; and a flow mechanism that includes a generation part that is connected to the container via the opening and generates a gas bubble(s) in the container through the opening, and that causes the electrolytic solution to flow, wherein a protrusion part that is positioned at an edge part of the opening and extends in upward and downward directions is disposed on the bottom surface.

2 . The secondary battery according to claim 1 , further comprising
a visor member that includes the protrusion part and a receiving surface that is disposed at a tip part of the protrusion part and overlaps with the opening in a plan view thereof.

3 . The secondary battery according to claim 2 , wherein the receiving surface overlaps with a region from a peripheral part to a center of the opening in a plan view thereof.

4 . The secondary battery according to claim 2 , wherein a length from an end part of the receiving surface to the opening in a horizontal direction is a diameter of the opening or greater.

5 . The secondary battery according to claim 2 , wherein a length from an end part of the receiving surface to the opening in a horizontal direction is 3 times a diameter of the opening or less.

6 . The secondary battery according to claim 2 , wherein an area of a space that is interposed between the receiving surface and a placing surface for the visor member in a side view from a width direction of the receiving surface is 10 times a diameter of the opening or greater.

7 . The secondary battery according to claim 2 , wherein the receiving surface includes a sloping surface with an upward slope from a side of the opening toward a side of an end part of the receiving surface.

8 . The secondary battery according to claim 7 , wherein an angle θ 1 of the sloping surface is 0°<θ 1 ≤30°.

9 . The secondary battery according to claim 7 , wherein the receiving surface includes a upward convex curved surface that extends from a part that overlaps with the opening in a plan view toward a side of an end part of the receiving surface.

10 . The secondary battery according to claim 7 , wherein the receiving surface includes a groove part that extends from a part that overlaps with the opening in a plan view toward a side of an end part of the receiving surface.

11 . The secondary battery according to claim 2 , wherein:
the visor member is arranged between the cathode and the anode in a plan view; and the receiving surface extends along a width direction of the anode.

12 . The secondary battery according to claim 2 , wherein:
a plurality of the receiving surfaces are arranged in a width direction of the anode; and the opening is arranged on each of the receiving surfaces.

13 . The secondary battery according to claim 2 , wherein the opening discharges a gas in a direction with a depression angle of 0° or greater.

14 . The secondary battery according to claim 1 , wherein a length of a bottom part of the protrusion part that is connected to the bottom surface in a horizontal direction is less than a length of a tip part thereof in a horizontal direction.

15 . A secondary battery, comprising:
a container; an electrolytic solution that is disposed in the container; a cathode and an anode that are disposed in the electrolytic solution; and a flow mechanism that causes the electrolytic solution to flow, wherein the flow mechanism includes a supply part that supplies a gas and a generation member that is disposed from an outside of the container to an inside of the container and includes an opening that is positioned below the cathode and the anode in the container, is connected to the supply part, and discharges a gas in a direction with a depression angle to generate a gas bubble(s) in the electrolytic solution.

16 . The secondary battery according to claim 15 , wherein:
the generation member includes a receiving surface that extends in a radial direction of the opening; and a width of the receiving surface in the radial direction is greater than a diameter of the opening.

17 . The secondary battery according to claim 16 , wherein a width of the receiving surface in the radial direction is 3 times a diameter of the opening or less.

18 . The secondary battery according to claim 15 , wherein an angle θ 2 of the receiving surface is 0°<θ 2 ≤30°.

19 . The secondary battery according to claim 15 , wherein the opening is arranged between the cathode and the anode in a plan view and discharges the gas along a width direction of the anode.

20 . (canceled)

21 . The secondary battery according to claim 15 , further comprising
a powder that includes zinc and is mixed in the electrolytic solution to be movable therein.

Assignees

• Kyocera Corp

Inventors

• Hosomi Kazunori
• Ohkuma Takeshi

Classifications

• H01M4/32

  Nickel oxide or hydroxide electrodes · CPC title

• H01M10/049

  Processes for forming or storing electrodes in the battery container · CPC title

• H01M2300/0014

  Alkaline electrolytes · CPC title

• H01M50/70

  Arrangements for stirring or circulating the electrolyte · CPC title

• H01M4/244

  Zinc electrodes · CPC title