# US 2025/0145274 A1 · High voltage junction box for a battery pack > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0145274 A1 - Document ID: US20250145274A1 - Status: Published application - Kind: A1 - Application number: 19/014,981 - Filed: 2025-01-09 - Published: 2025-05-08 - Earliest claimed: 2022-11-14 - Assignees: Archer Aviation Inc. - Applicants: Archer Aviation Inc. - Inventors: Alex CLARABUT; Michael SCHWEKUTSCH; Paul FRIHAUF; Alan D. TEPE; Stephen SPITERI - Web page: https://patentgrep.com/patent/US20250145274A1 ## CPC - H01M 10/613: Cooling or keeping cold - B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors} - B60L 3/04: Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H) - B60L 50/60: using power supplied by batteries (in combination with fuel cells B60L50/75) - B60L 50/66: {Arrangements of batteries} - B60L 53/62: in response to charging parameters, e.g. current, voltage or electrical charge - B60L 58/10: for monitoring or controlling batteries - B60L 58/12: responding to state of charge [SoC] - B60L 58/18: of two or more battery modules - B60L 58/20: having different nominal voltages - B60L 58/26: by cooling - B64C 3/32: specially adapted for mounting power plant - B64C 29/0033: {the propellers being tiltable relative to the fuselage} - B64D 27/31: within, or attached to, wings - B64D 27/34: All-electric aircraft - B64D 27/357: using batteries - B64D 31/16: for electric power plants - B64D 33/08: of power plant cooling systems - B64D 35/021: for electric power plants - B64D 35/026: the electric power plant being integral with the propeller or rotor - B64D 45/00: Aircraft indicators or protectors not otherwise provided for - F28F 3/04: the means being integral with the element - F28F 3/044: {the deformations being pontual, e.g. dimples} - F28F 3/12: Elements constructed in the shape of a hollow panel, e.g. with channels {(F28D1/02, F28D1/03 take precedence)} - H01H 85/041: characterised by the type - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - H01M 10/441: {for several batteries or cells simultaneously or sequentially} - H01M 10/443: {in response to temperature} - H01M 10/46: Accumulators structurally combined with charging apparatus (circuits for charging H02J7/00) - H01M 10/482: {for several batteries or cells simultaneously or sequentially} - H01M 10/486: {for measuring temperature} - H01M 10/625: Vehicles - H01M 10/63: Control systems (charging or discharging in response to temperature H01M10/44 {, H01M10/443}; measurement of temperature H01M10/48 {, H01M10/486}) - H01M 10/6554: Rods or plates - H01M 10/6556: Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) - H01M 10/6568: characterised by flow circuits, e.g. loops, located externally to the cells or cell casings - 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 50/502: Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing - H01M 50/583: in response to current, e.g. fuses - H02H 7/20: for electronic equipment (for converters H02H7/10; for electric measuring instruments G01R1/36; for DC voltage or current semiconductor regulators G05F1/569; for amplifiers H03F1/52; for electronic switching circuits H03K17/08) - H02J 1/086: {for providing alternative feeding paths between load or loads and source or sources when the main path fails} - H02J 1/106: {for load balancing, symmetrisation, or sharing} - H02J 7/60: including safety or protection arrangements - H02J 7/62: against overcurrent - H02J 7/64: against overvoltage - H02J 7/65: against overtemperature - H02J 7/80: including monitoring or indicating arrangements - H02J 7/82: Control of state of charge [SOC] - H02J 9/06: with automatic change-over {, e.g. UPS systems} - B60L 2200/10: Air crafts - B64C 29/0008: {having its flight directional axis horizontal when grounded} - B64D 2045/0085: {Devices for aircraft health monitoring, e.g. monitoring flutter or vibration} - B64D 2221/00: Electric power distribution systems onboard aircraft - F28D 1/03: with plate-like or laminated conduits {(stacked plates having one or more openings therein to form tubular heat-exchange passages F28F3/086)} - F28D 2021/0021: {for aircrafts or cosmonautics} - F28D 2021/0029: {Heat sinks} - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - H01M 2010/4278: {Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller} - H01M 2200/103: Fuse - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H02G 3/08: Distribution boxes; Connection or junction boxes - H02J 2105/32: {for aircrafts} - 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 - B64C: AEROPLANES; HELICOPTERS - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract “A battery pack assembly, comprising: a battery pack, the battery pack comprising: a battery pack enclosure, and one or more battery cells within the battery pack enclosure, and a junction box, the junction box comprising: a junction box enclosure including one base wall, four side walls connected to the base wall, and one open end, and a battery management unit, at least one fuse, and at least one switch, each located within the junction box enclosure and mounted to the base wall. The four side walls of the junction box enclosure are removably secured to the battery pack enclosure at the open end.” ## Claims ### Claim at position 1 1-21. (canceled) ### Claim 22 A battery pack assembly, comprising: a battery pack, the battery pack comprising: a battery pack enclosure; and one or more battery cells within the battery pack enclosure; and a junction box, the junction box comprising: a junction box enclosure including one base wall, four side walls connected to the base wall, and one open end; and a battery management unit, at least one fuse, and at least one switch, each located within the junction box enclosure and mounted to the base wall; wherein the four side walls of the junction box enclosure are removably secured to the battery pack enclosure at the open end. ### Claim 23 (depends on 22) The battery pack assembly of claim 22, wherein the battery pack enclosure includes a cut-out portion that is covered by the junction box upon securing the junction box enclosure to the battery pack enclosure. ### Claim 24 (depends on 22) The battery pack assembly of claim 22, wherein each side wall of the junction box enclosure has a flanged end that is secured to the battery pack enclosure. ### Claim 25 (depends on 22) The battery pack assembly of claim 22, wherein the at least one switch is a contactor configured to control power from the one or more battery cells. ### Claim 26 (depends on 22) The battery pack assembly of claim 22, wherein the battery pack includes at least one cell management unit mounted within the battery pack enclosure to monitor voltage and temperature of the one or more battery cells of the battery pack. ### Claim 27 (depends on 22) The battery pack assembly of claim 22, wherein the battery pack includes at least two cell management units mounted within the battery pack enclosure and wherein the at least two cell management units are daisy chained together. ### Claim 28 (depends on 27) The battery pack assembly of claim 27, wherein the battery pack assembly comprises a wired connection between the battery management unit and a cell management unit of the at least two cell management units; and wherein the battery management unit is configured to receive voltage and temperature measurements of the one or more battery cells through the wired connection. ### Claim 29 (depends on 22) The battery pack assembly of claim 22, wherein the junction box base wall includes at least one access panel configured to provide access to electrically connect the junction box and the battery pack. ### Claim 30 (depends on 22) The battery pack assembly of claim 22, wherein the battery pack assembly is mounted inside an aircraft wing; and wherein the aircraft wing includes at least one access panel configured to provide access to electrically connect the junction box to the battery pack. ### Claim 31 (depends on 30) The battery pack assembly of claim 30, wherein the battery pack is towards the bottom of the aircraft wing and the junction box is towards the top of the aircraft wing relative to the battery pack and wherein the access panel is on the top of the aircraft wing. ### Claim 32 (depends on 30) The battery pack assembly of claim 30, wherein the battery pack includes at least one stiffener and a crush core on the side of the battery pack opposite the junction box. ### Claim 33 An aircraft wing, comprising: a battery pack, the battery pack comprising: a battery pack enclosure; and one or more battery cells within the battery pack enclosure; and a junction box, the junction box comprising: a junction box enclosure including one base wall, four side walls connected to the base wall, and one open end; and a battery management unit, at least one fuse, and at least one switch, each located within the junction box enclosure and mounted to the base wall; wherein the four side walls of the junction box enclosure are removably secured to the battery pack enclosure at the open end. ### Claim 34 (depends on 33) The aircraft wing of claim 33, wherein the battery pack enclosure includes a cut-out portion that is covered by the junction box upon securing the junction box enclosure to the battery pack enclosure. ### Claim 35 (depends on 33) The aircraft wing of claim 33, wherein each side wall of the junction box enclosure has a flanged end that is secured to the battery pack enclosure. ### Claim 36 (depends on 33) The aircraft wing of claim 33, wherein the at least one switch is a contactor configured to control power from the one or more battery cells. ### Claim 37 (depends on 33) The aircraft wing of claim 33, wherein the battery pack includes at least one cell management unit mounted within the battery pack enclosure to monitor voltage and temperature of the one or more battery cells of the battery pack. ### Claim 38 (depends on 33) The aircraft wing of claim 33, wherein the battery pack includes at least two cell management units that are mounted within the battery pack enclosure and wherein the at least two cell management units are daisy chained together. ### Claim 39 (depends on 38) The aircraft wing of claim 38, wherein the aircraft wing comprises a wired connection between the battery management unit and a cell management unit of the at least two cell management units; and wherein the battery management unit is configured to receive voltage and temperature measurements of the one or more battery cells through the wired connection. ### Claim 40 (depends on 33) The aircraft wing of claim 33, wherein the junction box base wall includes at least one access panel configured to provide access to electrically connect the junction box and the battery pack. ### Claim 41 (depends on 40) The aircraft wing of claim 40, wherein the battery pack is towards the bottom of the aircraft wing and the junction box is towards the top of the aircraft wing relative to the battery pack and wherein the top of the aircraft wing includes at least one access panel configured to provide access to electrically connect the junction box to the battery pack. ### Claim 42 (depends on 33) The aircraft wing of claim 33, wherein the battery pack includes at least one stiffener and a crush core on the side of the battery pack opposite the junction box.