Fuel cartridge coupling valve

• US 20070231621A1
• Filed: 01/19/2007
• Published: 10/04/2007
• Est. Priority Date: 01/19/2006
• Status: Abandoned Application

• Current Assignee: Direct Methanol Fuel Cell Corp. (VIASPACE, Inc.)
• Original Assignee: Direct Methanol Fuel Cell Corp. (VIASPACE, Inc.)
• Inventors: Chave, Robert, Arias, Jeffrey, Rosal, Manuel, Evans, Robert, Dubenko, John, Kim, Dae, Lee, Kook
• Application Number:
  US11/655,782
• Publication Number:
  US 20070231621A1
• Time in Patent Office: Days
• US Class Current: 137/614.200
• CPC Class Codes: H01M 8/04201 Reactant storage and supply, e.g. means for feeding, pipes
• CPC Class Codes: H01M 8/04208 Cartridges, cryogenic media or cryogenic reservoirs
• CPC Class Codes: Y02E 60/50 Fuel cells
• CPC Class Codes: Y10T 137/88054 Direct response normally closed valve limits direction of flow

Abstract

Fuel cartridges for delivering fuel to a fuel consuming device, such as a fuel cell, are provided. Valves for use on cartridges or devices may include one or more internal seals that prevent fuel flow except when a valve is connected to a properly coupled corresponding valve and a seal between the two vales is established. Cartridge housings may include venting to maintain pressure equilibrium. A flexible or deformable fuel reservoir may be used with a pressurizing system that causes fuel to flow from a cartridge to a device independent of orientation.

Claims

1. An apparatus comprising:

an internal flow path having a first flow end and a second flow end;

a fuel reservoir connected to the first flow end;

a deformable ring comprising a substantially cylindrical outer surface, a first end and a second end, a circumferential ridge disposed between the first end and the second end encircling the outer surface, and an annular opening that leads from a first opening on the first end to a second opening on the second end, the annular opening comprising an approximately cylindrical region near the first end and a conical region that tapers from the cylindrical region to the second end, the second opening being of smaller diameter than the first hole;

a movable internal sealing member disposed within the internal flow path proximate to the second opening, the internal sealing member being biased against the second opening by a biasing force to form a liquid-tight internal seal that closes the second opening to block the internal flow path, the internal sealing member breaking the internal seal when a device valve of a separate apparatus contacts and forms an external seal with the conical region and then extends an actuating member through the annular opening to exert an opening force directed substantially opposite to the direction of the biasing force on the internal sealing member.

2. An apparatus as in claim 1, wherein the deformable ring comprises a raised circular ridge around the second opening and the internal sealing member comprises a convex sealing head that forms the internal seal when biased against the raised circular ridge.

3. An apparatus as in claim 1, further comprising:

a biasing support disposed within the internal flow path; and

an outwardly biased element providing the internal biasing force and comprising a first spring end in contact with the biasing support and a second spring end in contact with the internal sealing member.

4. An apparatus as in claim 1, wherein the separate apparatus comprises a fuel consuming device or a fuel cell.

5. An apparatus as in claim 1, wherein the fuel reservoir comprises a bladder, or a container with two opposing, substantially similarly sized, and substantially parallel sides that are connected by a deformable side wall.

6. An apparatus as in claim 1, wherein the deformable ring comprises an absorbent material that absorbs fuel released during a coupling or a decoupling of the external sealing interface with the coupling member of the device valve.

7. An apparatus as in claim 1, wherein the internal sealing member comprises:

a poppet pin comprising a poppet head and a poppet stem, the poppet head having a sealing face comprising a poppet sealing feature that mates with an internal sealing interface feature of the internal sealing interface to create the internal seal, the poppet stem extending from the poppet head opposite the sealing face; and

a poppet spring disposed around the poppet stem, the poppet spring providing the internal biasing force.

8. An apparatus as in claim 7, further comprising a valve body with an open valve body end, a closed valve body end that comprises a fuel port hole, and a seating surface disposed within the valve body between the open end and the closed end, the valve body enclosing the internal sealing member and the deformable ring, the second end of the deformable ring seating on the seating surface, a first end of the poppet spring contacting the closed valve body end and a second end of the poppet spring contacting the poppet head opposite the poppet face.

9. An apparatus as in claim 8, wherein the poppet stem passes through the fuel port when the opening force is exerted on the internal sealing member and the poppet stem comprises a channel that allows fuel to flow past the poppet stem between the fuel reservoir and the external sealing interface.

10. An apparatus as in claim 8, wherein the valve body further comprises a fuel conducting groove along an internal surface, the fuel conducting groove extending from near the closed end to the seating surface to conduct fuel around the poppet head.

11. An apparatus as in claim 1, further comprising a substantially planar pressure plate that applies a pressure against a side of the fuel reservoir, the pressure being substantially uniform with distance across the side of the fuel reservoir.

12. An apparatus as in claim 1, further comprising:

a fuel cartridge housing to substantially enclose the fuel reservoir;

a substantially planar pressure plate disposed proximately to a side of the fuel reservoir; and

a pressure plate biasing element disposed between an internal surface of the fuel cartridge housing and the pressure plate, the pressure plate biasing element providing a pressure plate biasing force that biases the pressure plate against the side of the fuel reservoir to provide a pressure that is substantially uniform with distance over the side of the fuel reservoir.

13. An apparatus as in claim 12, further comprising a ventilation plug disposed in ventilation port that passes through the housing, the ventilation plug allowing air pressure within the fuel cartridge housing to equalize with ambient pressure and comprising:

a first plug section, a second plug section, and a third plug section, all disposed along a common axis, the first plug section comprising an outer face disposed opposite to the second plug section and the third plug section, the second plug section having a smaller cross-sectional area than the first plug section, the third plug section comprising at least one wing that extends wider than the second plug section;

a blind hole aligned along the common axis and extending from the outer face and at least partially through the second plug section;

a through hole passing through the second plug section substantially perpendicularly to the common axis, the through hole intersecting the blind hole; and

a porous material filling the blind hole, the porous material being permeable to gases but substantially impermeable to liquids.

15. A method as in claim 10, wherein the device is a fuel consuming device or a fuel cell.

16. A method as in claim 10, wherein the fuel cartridge valve further comprises:

a biasing support disposed within the internal flow path; and

an outwardly biased element providing the internal biasing force and comprising a first spring end in contact with the biasing support and a second spring end in contact with the internal sealing member.

14. A method comprising:

initiating a coupling of a fuel cartridge valve with a device valve of a device, the fuel cartridge valve comprising an internal flow path having a first flow end and a second flow end;

a fuel reservoir connected to the first flow end;

a deformable ring comprising a substantially cylindrical outer surface, a first end and a second end, a circumferential ridge disposed between the first end and the second end encircling the outer surface, and an annular opening that leads from a first opening on the first end to a second opening on the second end, the annular opening comprising an approximately cylindrical region near the first end and a conical region that tapers from the cylindrical region to the second end, the second opening being of smaller diameter than the first hole;

a movable internal sealing member disposed within the internal flow path proximate to the second opening, the internal sealing member being biased against the second opening by a biasing force to form a liquid-tight internal seal that closes the second opening to block the internal flow path; and

the device valve comprising a coupling member configured to form a liquid-tight external seal with the conical region and provide a liquid-tight external flow path connecting the device valve to the fuel reservoir via the internal flow path, and an actuating member;

extending the actuating member through the annular opening to exert an opening force directed substantially opposite to the direction of the biasing force on the internal sealing member to break the break the internal seal; and

causing fuel to flow between the fuel cartridge housing and the device.

17. A valve element comprising:

a ring formed of a deformable material and comprising a substantially cylindrical outer surface, a first end and a second end, and an annular opening that leads from a first opening on the first end to a second opening on the second end, the annular opening comprising an approximately cylindrical region near the first end and a conical region that tapers from the cylindrical region to the second end, the second opening being of smaller diameter than the first hole.

18. A valve element as in claim 17, further comprising a raised circular ridge on the second end that encircles the second hole.

19. A valve element as in claim 17, further comprising a circumferential ridge disposed between the first end and the second end and that encompasses the outer surface, the circumferential ridge securing the valve element in place when the valve element is assembled in a compatible valve body.

20. A method as in claim 17, wherein the deformable ring comprises an absorbent material that absorbs fuel released during a coupling or a decoupling of the conical region with the coupling member of the device valve.