US 6,418,962 B1Granted

Low cost, compressed gas fuel storage system

AssigneeThe Johns Hopkins University

InventorsJohn J. Wozniak, Paul D. Wienhold, Dale B. Tiller

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Abstract

A compressed gas vehicle fuel storage system comprised of a plurality of compressed gas pressure cells supported by shock-absorbing bumpers positioned within a low cost, shape-conforming container. The container is dimensioned relative to the compressed gas pressure cells whereby a radial air gap surrounds each compressed gas pressure cell. The radial air gap allows pressure-induced expansion of the pressure cells without resulting in the application of pressure to adjacent pressure cells or physical pressure to the container. The pressure cells are interconnected by a gas control assembly including a thermally activated pressure relief device, a manual safety shut-off valve, and means for connecting the fuel storage system to a vehicle power source and a refueling adapter. The gas control assembly is enclosed by a protective cover attached to the container. The system is attached to the vehicle with straps to enable the chassis to deform as intended in a high-speed collision.

Claims10

Dependent claims

An integrated compressed gas vehicle fuel storage system, comprising:

a plurality of compressed gas pressure cells of the type incorporating domed ends and cylindrical bodies;
a container for said plurality of compressed gas pressure cells, wherein said container is comprised of mirror image top and bottom halves configured to conform to the shape of said plurality of compressed gas pressure cells;
means for securing said plurality of compressed gas pressure cells within said container and for isolating said plurality of compressed gas pressure cells from each other and from said container whereby expansion of one of said compressed gas pressure cells will not apply pressure against adjacent compressed gas pressure cells or the inside of said container;
a gas control assembly pneumatically interconnecting said plurality of compressed gas pressure cells;
a protective cover for said gas control assembly fastened to said container;
valleys formed in the interior of said top and bottom halves between adjacent compressed gas pressure cells;
reinforcing webbing located within said valleys;
pillars located within said valleys as mirror image pillars in said top and bottom halves and dimensioned to engage their respective mirror image pillar when said top and bottom halves are assembled;
and
a means for securing said system to the vehicle which allows for deformation of the vehicle chassis for protection of the passenger compartment in the event of a high-impact collision.

7 more elements

An integrated compressed gas vehicle fuel storage system, comprising:

a plurality of compressed gas pressure cells of the type incorporating domed ends and cylindrical bodies;
a container for said plurality of compressed gas pressure cells comprising:
a molded bottom half;
a molded top half;
said top and bottom halves including walls which are opposing when said halves are assembled as said container;
said opposing walls including a curved section for each one of said plurality of compressed gas cylinders;
and
adjoining edges of said curved sections create valley shaped partitions there between, wherein said valleys shaped partitions comprise reinforcing webs created as part of the molded unitized structure comprising each of said top and bottom halves;
means for preventing the direct mechanical coupling of said compressed gas pressure cells with each other or said container comprising a radial space about said cylindrical bodies of said compressed gas pressure cells;
shock absorbing means for positioning and holding said domed ends of said compressed gas pressure cells within said container, said radial space being created by the configuration of said shock absorbing means and the relative dimensions of said container and said compressed gas pressure cells;
a gas control assembly pneumatically interconnecting said plurality of compressed gas pressure cells;
and
a protective cover for said gas control assembly fastened to said container.

10 more elements

Dependencies are inferred from the claim text.