# US 10,312,490 B2 · Vent devices for electrified vehicle battery packs > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,490 B2 - Document ID: US10312490B2 - Status: Granted - Kind: B2 - Application number: 15/090,668 - Filed: 2016-04-05 - Published: 2017-10-05 - Granted: 2019-06-04 - Earliest claimed: 2016-04-05 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Patrick Daniel Maguire - Web page: https://patentgrep.com/patent/US10312490B2 ## CPC - H01M 50/3425: {in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member} - B60L 50/64: Constructional details of batteries specially adapted for electric vehicles - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) - H01M 50/317: Re-sealable arrangements - H01M 50/333: Spring-loaded vent valves - H01M 50/35: Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages - H01M 50/262: with fastening means, e.g. locks - H01M 50/271: Lids or covers for the racks or secondary casings - H01M 2200/20: Pressure-sensitive devices - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A battery pack according to an exemplary aspect of the present disclosure includes, among other things, an enclosure that houses at least one battery cell and a vent device comprised of a polymeric material and adapted to discharge battery vent byproducts vented by the battery cell to a location external to the enclosure while preventing ingress of environmental fluids into the enclosure. ## Claims ### Claim 1 A battery pack, comprising: an enclosure that houses a plurality of battery cells; and a vent device comprised of a polymeric material and adapted to discharge battery vent byproducts vented by said battery cells to a location external to said enclosure while preventing ingress of environmental fluids into said enclosure, wherein said vent device is non-contiguous with a housing of any of said battery cells. ### Claim 2 (depends on 1) The battery pack as recited in claim 1, wherein said vent device includes a vent tube and a removable cap received over said vent tube. ### Claim 3 A battery pack, comprising: an enclosure that houses at least one battery cell; and a vent device comprised of a polymeric material and adapted to discharge battery vent byproducts vented by said battery cell to a location external to said enclosure while preventing ingress of environmental fluids into said enclosure, wherein said vent device is separate and remote from said battery cell, wherein said vent device includes a vent tube and a removable cap received over said vent tube, and said vent tube includes a barb received within a groove of said removable cap. ### Claim 4 (depends on 1) The battery pack as recited in claim 1, wherein said vent device includes a flap movable between a first position in which an outlet of said vent device is closed and a second position in which said outlet is open. ### Claim 5 (depends on 4) The battery pack as recited in claim 4, wherein said flap is part of a grommet of said vent device. ### Claim 6 (depends on 4) The battery pack as recited in claim 4, wherein said flap is part of a vent tube of said vent device. ### Claim 7 (depends on 1) The battery pack as recited in claim 1, wherein said vent device includes a predefined failure area configured to plastically deform in response to pressure build-up inside said vent device. ### Claim 8 (depends on 7) The battery pack as recited in claim 7, wherein said predefined failure area includes a notch formed in an outer surface of a vent tube. ### Claim 9 (depends on 1) The battery pack as recited in claim 1, wherein said vent device includes a vent tube having a closed end, a predefined failure area formed adjacent to said closed end, and an enlarged section that is enlarged compared to a remainder of said vent tube, said enlarged section disposed between said predefined failure area and said closed end. ### Claim 10 (depends on 1) The battery pack as recited in claim 1, wherein said vent device includes a vent tube, a bulb formed on an end of said vent tube, and a stress notch formed in said bulb. ### Claim 11 (depends on 1) The battery pack as recited in claim 1, wherein said vent device is mounted externally of said enclosure. ### Claim 12 (depends on 1) The battery pack as recited in claim 1, wherein said vent device is at least partially mounted inside the enclosure. ### Claim 13 A battery pack, comprising: an enclosure; a plurality of battery cells housed inside said enclosure; a vent device extending through said enclosure and including a flap that is movable between a first position and a second position to expose an outlet of said vent device if a pressure inside said vent device exceeds a threshold pressure, wherein said enclosure is separate from a housing of any of said battery cells. ### Claim 14 A battery pack, comprising: a vent device including a flap that is movable between a first position and a second position to expose an outlet of said vent device if a pressure inside said vent device exceeds a threshold pressure, wherein said flap is part of a grommet of said vent device. ### Claim 15 (depends on 13) The battery pack as recited in claim 13, wherein said flap is part of a vent tube of said vent device. ### Claim 16 (depends on 13) The battery pack as recited in claim 13, wherein said flap is connected to a base of said vent device by a hinge. ### Claim 17 (depends on 13) The battery pack as recited in claim 13, wherein battery vent byproducts are discharged from said vent device if said flap is in said second position and environmental elements are block from ingress into said vent device if said flap is in said first position. ### Claim 18 A battery pack, comprising: a vent device configured to plastically deform at a predefined failure area to expose an outlet of said vent device if a pressure inside said vent device exceeds a threshold pressure, wherein said vent device is non-contiguous with a housing of any battery cell housed inside the battery pack. ### Claim 19 (depends on 18) The battery pack as recited in claim 18, wherein said predefined failure area is a notch formed in an external surface of a tube. ### Claim 20 (depends on 18) The battery pack as recited in claim 18, wherein said predefined failure area is a stress notch formed in a bulb of said vent device.