Valve structure for power storage device and power storage device

Patent metadata

Field	Value
Publication number	US-2023395930-A1
Application number	US-202118032249-A
Country	US
Kind code	A1
Filing date	Oct 15, 2021
Priority date	Oct 16, 2020
Publication date	Dec 7, 2023
Grant date	—

Abstract

A valve structure for a power storage device includes a passage that communicates the interior of a container housing a power storage device element with the exterior of the container, and a check valve disposed to block the passage and configured to open when the internal pressure of the container increases due to gas produced inside the container and pass the gas from the internal side of the container to the external side, the check valve including a valve seat and a valve body, and the valve structure including a liquid disposed to come in contact with the valve seat and the valve body.

First claim

1 . A valve structure for a power storage device, comprising:
a passage configured to communicate an interior of a container housing a power storage device element with an exterior of the container; and a check valve disposed to block the passage, and configured to open when an internal pressure of the container increases due to gas produced inside the container and pass the gas from an internal side of the container to an external side, wherein the check valve includes a valve seat and a valve body, and the valve structure comprises a liquid disposed to come in contact with the valve seat and the valve body.

2 . The valve structure for a power storage device according to claim 1 , wherein the liquid has a melting point not higher than 10° C.

3 . The valve structure for a power storage device according to claim 1 , wherein the liquid has a boiling point not less than 150° C.

4 . The valve structure for a power storage device according to claim 1 , wherein the liquid includes liquid paraffin.

5 . The valve structure for a power storage device according to claim 1 ,
wherein the liquid has a viscosity in a range of 0.1 mPa·s to 2000 mPa·s.

6 . The valve structure for a power storage device according to claim 1 ,
wherein the passage includes an outlet facing an external space, and the valve structure comprises a sealing member attached to close the outlet.

7 . The valve structure for a power storage device according to claim 1 , comprising:
a lid disposed at least on one of a primary side and a secondary side of the check valve and configured to permeate the gas.

8 . A power storage device comprising:
the valve structure for a power storage device according to claim 1 ; and the container to which the valve structure for a power storage device is attached.

9 . The valve structure for a power storage device according to claim 2 , wherein the liquid has a boiling point not less than 150° C.

10 . The valve structure for a power storage device according to claim 2 , wherein the liquid includes liquid paraffin.

11 . The valve structure for a power storage device according to claim 3 , wherein the liquid includes liquid paraffin.

12 . The valve structure for a power storage device according to claim 2 ,
wherein the liquid has a viscosity in a range of 0.1 mPa·s to 2000 mPa·s.

13 . The valve structure for a power storage device according to claim 3 ,
wherein the liquid has a viscosity in a range of 0.1 mPa·s to 2000 mPa·s.

14 . The valve structure for a power storage device according to claim 4 ,
wherein the liquid has a viscosity in a range of 0.1 mPa·s to 2000 mPa·s.

15 . The valve structure for a power storage device according to claim 2 ,
wherein the passage includes an outlet facing an external space, and the valve structure comprises a sealing member attached to close the outlet.

16 . The valve structure for a power storage device according to claim 3 ,
wherein the passage includes an outlet facing an external space, and the valve structure comprises a sealing member attached to close the outlet.

17 . The valve structure for a power storage device according to claim 4 ,
wherein the passage includes an outlet facing an external space, and the valve structure comprises a sealing member attached to close the outlet.

18 . The valve structure for a power storage device according to claim 5 ,
wherein the passage includes an outlet facing an external space, and the valve structure comprises a sealing member attached to close the outlet.

19 . The valve structure for a power storage device according to claim 2 , comprising:
a lid disposed at least on one of a primary side and a secondary side of the check valve and configured to permeate the gas.

20 . The valve structure for a power storage device according to claim 3 , comprising:
a lid disposed at least on one of a primary side and a secondary side of the check valve and configured to permeate the gas.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Sasaki Miho
• Sasaki Tomohiro

Classifications

• H01M50/333 Primary

  Spring-loaded vent valves · CPC title

• H01M50/394

  Gas-pervious parts or elements · CPC title

• H01M2200/20

  Pressure-sensitive devices · CPC title

• H01M50/317 Primary

  Re-sealable arrangements · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title