Pressure relief device

Patent metadata

Field	Value
Publication number	US-11788638-B2
Application number	US-202217847850-A
Country	US
Kind code	B2
Filing date	Jun 23, 2022
Priority date	Feb 22, 2022
Publication date	Oct 17, 2023
Grant date	Oct 17, 2023

Abstract

A pressure relief device includes a housing member having an inner space, a piston member provided in the inner space of the housing member, and a fusible member provided in a region below the piston member. The piston member includes an upper end region formed at an upper end in the up-down direction (H), and a connection region which is formed below the upper end region and extends downward from the upper end region while being connected to the upper end region. A first width (W1) of the upper end region in a left-right direction (A) is equal to a second width (W2) of the connection region in the left-right direction (A) or less than the second width (W2).

First claim

The invention claimed is:

1. A pressure relief device comprising:
a housing member having an inner space that communicates with an outside through an upper region;
a piston member positioned in the inner space of the housing member and capable of moving in an up-down direction (H); and
a fusible member positioned in a region below the piston member;
wherein the piston member comprises:
an upper end region formed at an upper end in the up-down direction (H); and
a connection region formed below the upper end region and extending downward from the upper end region and being connected to the upper end region;
wherein a first width (W 1 ) of the upper end region in a left-right direction (A) is equal to or less than a second width (W 2 ) of the connection region in the left-right direction (A); and
wherein the upper end region does not have a shape that protrudes in the left-right direction (A) with respect to the connection region.

2. The pressure relief device of claim 1 , further comprising a first sealing member surrounding an outer surface of the connection region.

3. The pressure relief device of claim 2 , further comprising a first back-up member surrounding the outer surface of the connection region, and positioned below the first sealing member.

4. The pressure relief device of claim 2 , wherein the piston member further comprises:
a protrusion region formed below the connection region, and having a third width (W 3 ) in the left-right direction (A) greater than the second width (W 2 ); and
a recess region formed below the protrusion region, extending downward from the protrusion region and being connected to the protrusion region, and having a fourth width (W 4 ) in the left-right direction (A) smaller than the third width (W 3 );
wherein the pressure relief device further comprises a second sealing member which surrounds an outer surface of the recess region.

5. The pressure relief device of claim 4 , further comprising a second back-up member surrounding the outer surface of the recess region, and provided below the second sealing member.

6. The pressure relief device of claim 3 , wherein a brittleness of the first back-up member is greater than a brittleness of the first sealing member.

7. The pressure relief device of claim 3 , wherein an elongation of the first sealing member is greater than an elongation of the first back-up member.

8. The pressure relief device of claim 4 , wherein the inner space comprises:
a first inner space communicating with the outside through the upper region of the housing member, and having a first space width (S 1 ) in the left-right direction (A); and
a second inner space positioned below the first inner space, communicating with the first inner space, and having a second space width (S 2 ) in the left-right direction (A) greater than the first space width (S 1 );
wherein the connection region and the protrusion region are inserted into the second inner space.

9. The pressure relief device of claim 8 , wherein a width of the first sealing member in the left-right direction (A) is greater than the first space width (S 1 ) of the first inner space.

10. The pressure relief device of claim 8 , wherein the inner space further comprises a third inner space positioned below the second inner space, communicating with the second inner space, and having a third space width (S 3 ) in the left-right direction (A) greater than the second space width (S 2 ).

11. The pressure relief device of claim 10 , further comprising a spring member surrounding an outer surface of the piston member and pressing the piston member downward.

12. The pressure relief device of claim 11 , wherein the spring member is inserted into the third inner space; and
a width of the spring member in the left-right direction (A) is greater than the second space width (S 2 ).

13. The pressure relief device of claim 1 , further comprising a porous member provided in a region below the fusible member, and supporting the fusible member upward.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Ham Jeong Hyun

Classifications

• F16K17/383 Primary

  the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug (F16K17/386 takes precedence) · CPC title

• F16K17/003

  reacting to pressure and temperature · CPC title

• F16K31/002

  actuated by temperature variation (thermo-electric F16K31/025) · CPC title

• F17C13/04 Primary

  Arrangement or mounting of valves (valves per se F16K {; snap-coupling of nipples F16L37/00}) · CPC title

• F17C2270/0763

  Fuel cells · CPC title