Fuel cartridge

• US 20080029156A1
• Filed: 01/19/2007
• Published: 02/07/2008
• 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: Miranda, Omar, Chave, Robert, Arias, Jeffrey, Rosal, Manuel, Evans, Robert, Dubenko, John
• Application Number:
  US11/655,788
• Publication Number:
  US 20080029156A1
• Time in Patent Office: Days
• US Class Current: 137/2
• CPC Class Codes: H01M 8/04208 Cartridges, cryogenic media or cryogenic reservoirs
• CPC Class Codes: Y02E 60/50 Fuel cells
• CPC Class Codes: Y10T 137/0324 With control of flow by a condition or characteristic of a fluid
• CPC Class Codes: Y10T 137/0874 Vent opening or closing on tipping container
• CPC Class Codes: Y10T 137/7504 Removable valve head and seat unit
• CPC Class Codes: Y10T 137/9247 With closure

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:

a septum comprising an outer face and an inner face;

a fuel exchange chamber proximately disposed to the inner face;

an internal sealing interface disposed intermediately between the inner face and the fuel exchange chamber;

a movable hollow member comprising a closed member end proximately disposed to the inner face, an open member end opposite the closed end, one or more walls connecting the closed member end and the member open end, and a hole in the one or more walls near the closed member end, the closed member end biased toward the inner face by a biasing force that aligns the hole with the internal sealing interface; and

a valve cover comprising an orifice configured to allow a device valve coupling member of a separate apparatus to enter and pass through the septum to exert an opening force on the closed member end to move the movable hollow member away from the septum and the internal sealing interface and connect the hole to the fuel chamber, the head entering the fuel exchange chamber to connect a fuel port in a side of the coupling member to the fuel exchange chamber and create a flow path between the open end and the device valve.

2. An apparatus as in claim 1, further comprising

a cartridge plunger comprising a first end disposed proximate the open plunger end of the movable hollow member, a second plunger end opposite the first end, one or more plunger walls between the first plunger end and the second plunger end, and a plunger flow path between a first plunger hole in the first end and a second plunger hole in the one or more walls near the second plunger end;

and

a plunger biasing element providing the biasing force on the cartridge plunger, the biasing force being transmitted by the plunger to the movable hollow member.

3. An apparatus as in claim 1, wherein the movable hollow member is substantially cylindrical and the orifice is substantially circular.

4. An apparatus as in claim 1, further comprising an absorbent material disposed outside of the valve cover to absorb fuel that might escape when coupling member enters or exits the septum.

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

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

7. An apparatus as in claim 1, further comprising a substantially planar pressure plate that applies pressure against a side of the fuel reservoir.

8. An apparatus as in claim 7, wherein the pressure applied by the pressure plate is substantially uniform with distance across the side of the fuel reservoir.

9. An apparatus as in claim 1, further comprising a fuel cartridge housing comprising a first housing element that can be mated with a second housing element to substantially enclose the fuel reservoir.

10. An apparatus as in claim 9, further comprising:

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.

11. An apparatus as in claim 9, wherein the first housing element comprises a ventilation port that allows air pressure within the fuel cartridge housing to equalize with ambient pressure.

12. An apparatus as in claim 11, further comprising a ventilation plug disposed in the ventilation port, the ventilation plug comprising:

a first plug section, 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.

13. An apparatus as in claim 12, wherein the ventilation port comprises a porous plug.

14. An apparatus as in claim 13, wherein the porous plug is permeable to air flow but substantially impermeable to liquid flow.

15. An apparatus as in claim 1, further comprising a removable cover that covers the external sealing interface to reduce contamination, the removable cover being removed prior to coupling the apparatus to a device valve.

16. An apparatus comprising:

a coupling member of a first valve comprising a fuel port hole disposed on a coupling member and connected to a flow path within the apparatus, the coupling member being configured to pass through a septum of a second valve of a separate apparatus and to extend into the second valve such that the fuel port enters a fuel exchange chamber in the second valve to provide a flow connection between the flow path and the fuel chamber, the fuel chamber being disposed behind the septum and a sealing interface of the second valve.

17. An apparatus as in claim 16, wherein the coupling member comprises a substantially cylindrical body with a cross-sectional area that passes through an orifice on a valve cover on the second valve to reach the septum and a coupling end configured to pass through the septum.

18. An apparatus as in claim 17, wherein the fuel port is disposed on a side of the cylindrical body near the coupling end.

19. An apparatus as in claim 16, further comprising:

a fuel consuming component; and

a first flow path connected at a first end to the fuel consuming component and at a second end to the fuel port.

20. An apparatus as in claim 19, wherein the fuel consuming component is a fuel cell.

22. A method as in claim 18, wherein the device is a fuel consuming device.

23. A method as in claim 18, wherein the device comprises a fuel cell.

21. A method comprising:

initiating a coupling of a fuel cartridge valve with a device valve of a device, the fuel cartridge valve comprising a septum comprising an outer face and an inner face;

a fuel exchange chamber proximately disposed to the inner face;

an internal sealing interface disposed intermediately between the inner face and the fuel exchange chamber;

a movable hollow member comprising a closed member end proximately disposed to the inner face, an open member end opposite the closed end, one or more walls connecting the closed member end and the member open end, and a hole in the one or more walls near the closed member end, the closed member end biased toward the inner face by a biasing force that aligns the hole with the internal sealing interface; and

a valve cover comprising an orifice;

the device valve comprising a coupling member and a fuel port in a side of the coupling member, the coupling member being configured to pass through the orifice and exert an opening force on the closed member end to move the movable hollow member away from the septum and the internal sealing interface and connect the hole to the fuel chamber, the coupling member entering the fuel exchange chamber to connect the fuel port to the fuel exchange chamber and create a flow path between the open end and the device valve; and

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

24. An apparatus comprising:

a fuel reservoir,

a fuel cartridge housing;

a substantially planar pressure plate disposed proximately to a side of the fuel reservoir that applies pressure against the fuel reservoir;

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; and

a fuel cartridge valve connected to the fuel reservoir by a flow path.

25. An apparatus as in claim 24, wherein the pressure applied by the pressure plate is substantially uniform with distance across the side of the fuel reservoir.

26. An apparatus as in claim 24, further comprising a ventilation port disposed in a ventilation port on the housing, the ventilation plug comprising:

a first plug section, 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.

27. An apparatus as in claim 24, wherein the housing comprises a first housing element that can be mated with a second housing element to substantially enclose the fuel reservoir.