# US 11,909,067 B2 · Battery pack and aircraft > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,067 B2 - Document ID: US11909067B2 - Status: Granted - Kind: B2 - Application number: 17/688,936 - Filed: 2022-03-08 - Published: 2022-09-22 - Granted: 2024-02-20 - Earliest claimed: 2021-03-22 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Yuya Ishihara - Web page: https://patentgrep.com/patent/US11909067B2 ## CPC - H01M 50/367: Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems - B60L 58/26: by cooling - H01M 10/613: Cooling or keeping cold - H01M 10/625: Vehicles - H01M 10/6567: Liquids - H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells - 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 50/284: with incorporated circuit boards, e.g. printed circuit boards [PCB] - H01M 50/691: Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings - B60L 2200/10: Air crafts - B60L 2240/545: Temperature - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 2200/00: Safety devices for primary or secondary batteries - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using 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 ## Abstract In a battery pack, a housing includes an exhaust portion provided on an upper side in a gravity direction with respect to a housing portion that houses a live part. The exhaust portion includes: a storage portion configured to store a liquid; a first communication portion that communicates between an interior of the housing portion and an interior of the exhaust portion; and a second communication portion that communicates between an outside of a housing and an inside of the exhaust portion. When the battery pack is viewed from the upper side in the gravity direction, an opening of the second communication portion on an inner side of the exhaust portion is provided at a position that overlaps the storage portion and that does not overlap an opening of the first communication portion on the inner side of the exhaust portion. ## Claims ### Claim 1 A battery pack comprising: a housing; and a live electrical part housed in the housing, wherein the housing includes: a housing portion in which the live electrical part is housed; and an exhaust portion provided on an upper side in a gravity direction with respect to the housing portion in a state where the battery pack is placed, wherein the exhaust portion includes: a storage portion configured to store a liquid; a first communication portion that communicates between an interior of the housing portion and an interior of the exhaust portion; and a second communication portion that communicates between an outside of the housing and an inside of the exhaust portion, and wherein when the battery pack is viewed from the upper side in the gravity direction, an opening of the second communication portion on an inner side of the exhaust portion is provided at a position that overlaps the storage portion and that does not overlap an opening of the first communication portion on the inner side of the exhaust portion, an opening of the first communication portion on an inner side of the exhaust portion is provided at a position that is located on the upper side in the gravity direction with respect to a bottom surface of the storage portion, and the first communication portion is provided at a position that is located on a lower side in the gravity direction with respect to the opening of the second communication portion on the inner side of the exhaust portion. ### Claim 2 (depends on 1) The battery pack according to claim 1, wherein the opening of the second communication portion on the inner side of the exhaust portion is provided on the upper side in the gravity direction with respect to the storage portion. ### Claim 3 (depends on 1) The battery pack according to claim 1, further comprising: a third communication portion that is provided between the storage portion and the second communication portion in the gravity direction and that enables the storage portion, the first communication portion, and the second communication portion to communicate with each other. ### Claim 4 (depends on 1) The battery pack according to claim 1, wherein the storage portion includes a drain hole on a bottom surface side of a side surface thereof, the drain hole allowing an outside of the housing and an inside of the storage portion to communicate with each other, and in a direction toward the drain hole, a bottom surface of the storage portion is inclined downward in the gravity direction. ### Claim 5 (depends on 1) The battery pack according to claim 1, further comprising: a water supply and discharge nozzle configured to supply and discharge cooling water for cooling the live electrical part; and a junction box to which electrodes of the live electrical part are connected, wherein when the battery pack is viewed from a side thereof, the exhaust portion is disposed between the water supply and discharge nozzle and the junction box in a horizontal direction orthogonal to the gravity direction. ### Claim 6 An aircraft equipped with a battery pack, the battery pack including: a housing; and a live electrical part housed in the housing, wherein the housing includes: a housing portion in which the live electrical part is housed; and an exhaust portion provided on an upper side in a gravity direction with respect to the housing portion in a state where the battery pack is placed, wherein the exhaust portion includes: a storage portion configured to store a liquid; a first communication portion that communicates between an interior of the housing portion and an interior of the exhaust portion; and a second communication portion that communicates between an outside of the housing and an inside of the exhaust portion, and wherein when the battery pack is viewed from the upper side in the gravity direction, an opening of the second communication portion on an inner side of the exhaust portion is provided at a position that overlaps the storage portion and that does not overlap an opening of the first communication portion on the inner side of the exhaust portion, an opening of the first communication portion on an inner side of the exhaust portion is provided at a position that is located on the upper side in the gravity direction with respect to a bottom surface of the storage portion, and the first communication portion is provided at a position that is located on a lower side in the gravity direction with respect to the opening of the second communication portion on the inner side of the exhaust portion, the aircraft comprising: an exhaust pipe that communicates between the second communication portion and an outside of the aircraft.