BATTERY PACK THERMAL VENT PROTECTION
First Claim
Patent Images
1. A battery pack comprising:
- an enclosure;
one or more battery cells held within the enclosure;
a means for connecting the battery cells to a device to be powered;
a one-way check valve, the one way check valve fluidly connecting an area within the enclosure with an atmosphere outside of the enclosure, the one-way check valve allowing pressurized fluids to flow out of the enclosure and the one-way check valve preventing pressurized fluids from flowing from the atmosphere into the enclosure.
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Abstract
A battery pack includes a set of walls made of sturdy material, power interface terminals and battery cells and optionally electronics held within the walls. A spring-loaded check valve installed in a wall of the enclosure fluidly connects an area within the enclosure with an atmosphere outside of the enclosure. The one-way check valve allows pressurized fluids to flow out of the enclosure while preventing pressurized fluids from flowing from the atmosphere into the enclosure.
30 Citations
17 Claims
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1. A battery pack comprising:
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an enclosure; one or more battery cells held within the enclosure; a means for connecting the battery cells to a device to be powered; a one-way check valve, the one way check valve fluidly connecting an area within the enclosure with an atmosphere outside of the enclosure, the one-way check valve allowing pressurized fluids to flow out of the enclosure and the one-way check valve preventing pressurized fluids from flowing from the atmosphere into the enclosure. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of reducing battery pack failure during heat sterilization, the method comprising:
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providing one or more battery cells, the battery cells interconnected to provide power to a device; connecting the battery cells to connection terminals by a plurality of conductors, the conductors passing through the insulative layer; and enclosing the battery cells into a battery pack, the connection terminals accessible from outside of the battery pack; affixing a one-way check valve into a hole in a wall of the enclosure, the one way check valve fluidly connecting an area within the enclosure with an atmosphere outside of the enclosure, the one-way check valve allowing pressurized fluids to flow out of the enclosure and the one-way check valve preventing pressurized fluids from flowing from the atmosphere into the enclosure; whereby pressurized steam presented during a heat sterilization cycle is prevented from entering the battery pack by the one-way check valve while abnormal pressure from within the enclosure escapes through the one-way check valve and to the atmosphere. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A battery pack comprising:
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an enclosure; one or more battery cells held within the enclosure; a means for connecting the battery cells to a device to be powered; a one-way check valve, the one way check valve sealedly installed in a wall of the enclosure, the one-way check valve fluidly connecting an area within the enclosure with an atmosphere outside of the enclosure, the one-way check valve allowing pressurized fluids to flow out of the enclosure and the one-way check valve preventing pressurized fluids from flowing from the atmosphere into the enclosure; wherein the one-way check valve comprises a valve seat, a valve ball, a vented enclosure and a spring, the spring urging the valve ball against the valve seat, the valve seat fluidly interfaced to the area within the enclosure. - View Dependent Claims (14, 15, 16, 17)
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Specification