# US 12,759,388 B2 · Vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,388 B2 - Document ID: US12759388B2 - Status: Granted - Kind: B2 - Application number: 18/775,631 - Filed: 2024-07-17 - Published: 2024-11-07 - Granted: 2026-10-13 - Earliest claimed: 2022-03-31 - Assignees: BYD Company Limited - Applicants: BYD Company Limited - Inventors: Yubo Lian; Bengang Yi; Heping Ling; Junfei Yan; Tengyong Liu - Web page: https://patentgrep.com/patent/US12759388B2 ## CPC - B60K 1/04: of the electric storage means for propulsion - B60L 50/64: Constructional details of batteries specially adapted for electric vehicles - B60L 50/66: {Arrangements of batteries} - B62D 21/03: transverse members providing body support - B62D 25/025: {Side sills thereof} - H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells - H01M 50/242: adapted for protecting batteries against vibrations, collision impact or swelling - 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) - B60K 2001/0438: {Arrangement under the floor} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - 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 - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY ## Abstract A vehicle includes an underbody, a rear subframe, and a battery pack. The rear subframe is connected to the underbody. The battery pack is connected to the underbody and is disposed on a lower side of the underbody. A front end surface of the rear subframe includes a limiting surface for the battery pack to extend backward, and at least a part of an upper surface of the battery pack forms a portion of at least a portion of a floor of a vehicle body. ## Claims ### Claim 1 A vehicle, comprising: an underbody; a rear subframe connected to the underbody; and a battery pack connected to the underbody and disposed on a lower side of the underbody, wherein a front end surface of the rear subframe comprises a limiting surface for the battery pack to extend backward, and at least a part of an upper surface of the battery pack forms at least a portion of a floor of a vehicle body, wherein the underbody further comprises: a first rocker rail; and a second rocker rail disposed opposite to the first rocker rail in a width direction of the vehicle body, and the battery pack connected and mounted to the first rocker rail and the second rocker rail; wherein the underbody further comprises a rear cross beam; wherein a lower surface of the rear cross beam is spaced apart from the upper surface of the battery pack in a height direction of the vehicle body to form a sealed gap. ### Claim 2 (depends on 1) The vehicle according to claim 1, wherein a minimum distance between a rear end surface of the battery pack and the front end surface of the rear subframe is L, wherein L satisfies: 10 mm≤L≤100 mm. ### Claim 3 (depends on 1) The vehicle according to claim 1, wherein the underbody further comprises: two rear longitudinal beams disposed spaced apart in the width direction of the vehicle body, and a height of a bottom surface of a front section of the rear longitudinal beam with respect to the ground in a height direction of the vehicle body being higher than a height of a top surface of the battery pack with respect to the ground in the height direction of the vehicle body. ### Claim 4 (depends on 3) The vehicle according to claim 3, wherein: the rear cross beam extends in the width direction of the vehicle body, and is connected to the rear longitudinal beams, the first rocker rail, and the second rocker rail. ### Claim 5 (depends on 3) The vehicle according to claim 3, wherein the rear cross beam comprises: a left connecting plate; a right connecting plate; and a rear cross beam body, wherein the left connecting plate, the rear cross beam body, and the right connecting plate are connected. ### Claim 6 (depends on 5) The vehicle according to claim 5, wherein the rear longitudinal beam comprises: a left rear longitudinal beam connected to the left connecting plate of the rear cross beam; and a right rear longitudinal beam connected to the right connecting plate of the rear cross beam. ### Claim 7 (depends on 6) The vehicle according to claim 6, wherein: the left connecting plate of the rear cross beam is disposed on a front section of the left rear longitudinal beam, and the right connecting plate of the rear cross beam is disposed on a front section of the right rear longitudinal beam; the left connecting plate of the rear cross beam is connected to the first rocker rail and a left section of the rear cross beam body; and the right connecting plate of the rear cross beam is connected to the second rocker rail and a right section of the rear cross beam body. ### Claim 8 (depends on 6) The vehicle according to claim 6, wherein the rear cross beam further comprises a first boss disposed on the left connecting plate of the rear cross beam, and a second boss disposed on the right connecting plate of the rear cross beam, wherein: a rear subframe mounting point is disposed on each of the first boss and the second boss, and the first boss and the second boss are disposed on a rear side of the rear cross beam body in a length direction of the vehicle body; and heights of a lower side surface of the first boss and of a lower end surface of the second boss with respect to the ground in the height direction of the vehicle body are higher than a height of a lower side surface of the rear cross beam body with respect to the ground in the height direction of the vehicle body. ### Claim 9 (depends on 8) The vehicle according to claim 8, wherein the underbody further comprises a rear-seat front cross beam extending in the width direction of the vehicle body and connected to the rear longitudinal beam, the first rocker rail, and the second rocker rail, and a height of a lower surface of the rear-seat front cross beam with respect to the ground in the height direction of the vehicle body is higher than a height of the upper surface of the battery pack with respect to the ground in the height direction of the vehicle body. ### Claim 10 (depends on 9) The vehicle according to claim 9, wherein: two ends of the rear-seat front cross beam are respectively connected to the left rear longitudinal beam and the right rear longitudinal beam, and the rear-seat front cross beam, the left rear longitudinal beam, the rear cross beam, and the right rear longitudinal beam are connected to form a closed frame structure. ### Claim 11 (depends on 9) The vehicle according to claim 9, wherein: the left rear longitudinal beam comprises a front section, a front portion of the front section of the left rear longitudinal beam is connected to the rear-seat front cross beam, a rear portion of the front section of the left rear longitudinal beam is connected to the left connecting plate of the rear cross beam, and a height of a bottom of the front section of the left rear longitudinal beam with respect to the ground in the height direction of the vehicle body is higher than the height of the upper surface of the battery pack with respect to the ground in the height direction of the vehicle body; and the right rear longitudinal beam comprises a front section, a front portion of the front section of the right rear longitudinal beam is connected to the rear-seat front cross beam, a rear portion of the front section of the right rear longitudinal beam is connected to the right connecting plate of the rear cross beam, and a height of a bottom of the front section of the right rear longitudinal beam with respect to the ground in the height direction of the vehicle body is higher than the height of the upper surface of the battery pack with respect to the ground in the height direction of the vehicle body. ### Claim 12 (depends on 4) The vehicle according to claim 4, wherein the underbody further comprises a front longitudinal beam, a bottom surface of a rear end of the front longitudinal beam is spaced apart from the top surface of the battery pack in the height direction of the vehicle body to form a sealed gap; or the underbody further comprises a front cross beam, a front longitudinal beam, and A-pillars disposed oppositely, two ends of the front cross beam are connected to the A-pillars, and the front longitudinal beam is connected to the front cross beam. ### Claim 13 (depends on 12) The vehicle according to claim 12, further comprising a sealing plate assembly disposed on the underbody, wherein: the upper surface of the battery pack is sealed by the sealing plate assembly, and the sealing plate assembly comprises: a sealing plate; and at least one sealing member disposed between the sealing plate and the battery pack, wherein the sealing plate comprises a first plane portion, the battery pack comprises a second plane portion, the first plane portion is opposite to the second plane portion, and the sealing member is disposed between the first plane portion and the second plane portion, the first rocker rail is disposed on a left side of the underbody, and the second rocker rail is disposed on a right side of the underbody; and the sealing plate comprises a left sealing plate section and a right sealing plate section, a left end of the left sealing plate section comprises a left bent edge, the left sealing plate section is connected to the first rocker rail by the left bent edge, a right end of the right sealing plate section comprises a right bent edge, and the right sealing plate section is connected to the second rocker rail by the right bent edge, and the sealing plate further comprises a front sealing plate section and a rear sealing plate section, the front sealing plate section is connected to the front longitudinal beam, and the rear sealing plate section is connected to the rear cross beam. ### Claim 14 (depends on 1) The vehicle according to claim 1, wherein a rear end surface of the battery pack is beyond a rear end surface of the first rocker rail and a rear end surface of the second rocker rail in a length direction of the vehicle body. ### Claim 15 (depends on 1) The vehicle according to claim 1, further comprising: a front subframe connected to the underbody, wherein a rear end surface of the front subframe comprises a limiting surface for the battery pack to extend forward. ### Claim 16 (depends on 1) The vehicle according to claim 1, wherein the battery pack comprises: an upper housing; a lower housing; and at least one battery core, wherein the upper housing and the lower housing form an accommodating space, the at least one battery core is disposed in the accommodating space, at least a part of an upper surface of the upper housing forms at least a portion of a floor of the vehicle body, the battery core is connected to the upper housing, a top surface of the battery core is bonded with the upper housing, the lower housing is a cooling plate, and a bottom surface of the at least one battery core is bonded with the lower housing through a heat-conductive adhesive. ### Claim 17 (depends on 16) The vehicle according to claim 16, wherein the at least one battery core comprises a plurality of battery cores, a length direction of the battery cores is consistent with the length direction of the vehicle body, and the battery cores are disposed side by side in a width direction of the vehicle body. ### Claim 18 (depends on 1) The vehicle according to claim 1, further comprising a seat cross beam extending in a width direction of the vehicle body and disposed on the underbody; and a battery pack reinforcing beam extending in the width direction of the vehicle body and disposed on the battery pack, wherein the battery pack reinforcing beam is connected to the seat cross beam.