# US 12,759,385 B2 · Battery pack for electric vehicle and electric vehicle comprising battery pack > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,385 B2 - Document ID: US12759385B2 - Status: Granted - Kind: B2 - Application number: 18/572,797 - Filed: 2022-11-30 - Published: 2024-08-29 - Granted: 2026-10-13 - Earliest claimed: 2021-11-30 - Assignees: Aulton New Energy Automobile Technology Co., Ltd.; Shanghai Dianba New Energy Technology Co., Ltd. - Applicants: Aulton New Energy Automobile Technology Co., Ltd.; Shanghai Dianba New Energy Technology Co., Ltd. - Inventors: Jianping Zhang; Danliang Qiu; Meng Liu; Xinrui Yu - Web page: https://patentgrep.com/patent/US12759385B2 ## CPC - B60K 1/04: of the electric storage means for propulsion - B60L 50/64: Constructional details of batteries specially adapted for electric vehicles - B60L 53/80: Exchanging energy storage elements, e.g. removable batteries - H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/244: Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method - 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 50/262: with fastening means, e.g. locks - H01M 50/264: for cells or batteries, e.g. straps, tie rods or peripheral frames - H01M 50/289: characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) - B60K 2001/0405: {characterised by their position} - B60K 2001/0438: {Arrangement under the floor} - B60K 2001/0455: {Removal or replacement of the energy storages} - B60K 2001/0472: {from below} - H01M 50/242: adapted for protecting batteries against vibrations, collision impact or swelling - 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 - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY ## Abstract Disclosed in the present invention are a battery pack for an electric vehicle, and an electric vehicle comprising the battery pack. The battery pack for an electric vehicle is mounted on a vehicle body longitudinal beam of the electric vehicle, and comprises: a box body comprising at least two box body units, battery modules for externally charging and discharging being arranged in the box body units; and locking shafts provided horizontally, arranged on the upper part between two adjacent box body units, and corresponding to the position of a locking mechanism on the longitudinal beam. As for an electric vehicle, the center of gravity can be reduced, the driving stability is improved, and the height space below the vehicle can be fully utilized, so that a battery swapping device can conduct battery swapping easily, the station building cost, time and difficulty of a battery swapping station are reduced. ## Claims ### Claim 1 A battery pack for an electric vehicle, which is installed on a vehicle body longitudinal beam of the electric vehicle, wherein the battery pack for the electric vehicle comprises: a box, the box comprising at least two box units, and the box unit being provided with a battery module for external charging and discharging; a locking shaft arranged horizontally, the locking shaft being provided on upper part between two adjacent box units and corresponding to the location of a locking mechanism on the vehicle body longitudinal beam; a mounting plate is provided on the box, and one end of the locking shaft is connected to the mounting plate; there is a gap between the adjacent box units, and the box further comprises: a gap connection structure, the adjacent box units being connected by the gap connection structure, and the gap connection structure being respectively connected to the box bodies of the adjacent box units; the mounting plate is disposed on the gap connection structure. ### Claim 2 (depends on 1) The battery pack for the electric vehicle according to claim 1, wherein both ends of the locking shaft are connected to another mounting plate and the mounting plate respectively. ### Claim 3 (depends on 1) The battery pack for the electric vehicle according to claim 1, wherein the mounting plate is at least partially provided between two adjacent box units. ### Claim 4 (depends on 3) The battery pack for the electric vehicle according to claim 3, wherein the mounting plate extends along a longitudinal direction of the vehicle body longitudinal beam; there are a plurality of locking shafts, and the plurality of locking shafts are sequentially distributed on an end surface of the mounting plate close to the locking mechanism along the longitudinal direction of the vehicle body longitudinal beam. ### Claim 5 (depends on 4) The battery pack for the electric vehicle according to claim 4, wherein the battery pack for the electric vehicle further comprises a guide block, the guide block is elastically arranged on an end surface of the mounting plate close to the vehicle body longitudinal beam, and the guide block has a clamping surface for abutting against a side surface of the vehicle body longitudinal beam. ### Claim 6 (depends on 5) The battery pack for the electric vehicle according to claim 5, wherein one end of the guide block away from the box is obliquely provided with a guide surface, and the guide surface gradually approaches the mounting plate from bottom to top along a height direction of the battery pack for the electric vehicle; and/or, the locking shaft and the guide block are arranged on the mounting plate at intervals along a horizontal direction. ### Claim 7 (depends on 4) The battery pack for the electric vehicle according to claim 4, wherein each of the box units comprises: a box body, the box body being provided with a battery cell accommodating groove for placing a battery module; a box cover plate, the box cover plate being detachably connected to a notch of the battery cell accommodating groove of the box body and closing the notch. ### Claim 8 (depends on 7) The battery pack for the electric vehicle according to claim 7, wherein the battery pack for the electric vehicle further comprises a reinforcement beam, a first end of the reinforcement beam extends above the box and is connected to the mounting plate, and a second end of the reinforcement beam is connected to the gap connection structure. ### Claim 9 (depends on 8) The battery pack for the electric vehicle according to claim 8, wherein the gap connection structure comprises an upper plate and a lower plate, two ends of the lower plate are respectively connected to bottoms of the box bodies of the adjacent box units, and two ends of the upper plate are respectively connected to tops of the box bodies of the adjacent box units; the second end of the reinforcement beam passes through the upper plate and is connected to the lower plate; and/or, there are a plurality of reinforcement beams, and the plurality of reinforcement beams are arranged along the longitudinal direction of the longitudinal beam of the vehicle body. ### Claim 10 (depends on 9) The battery pack for the electric vehicle according to claim 9, wherein an upper end of the mounting plate is provided with a first extending portion, and the first extending portion wraps the first end of the reinforcement beam; and/or, a lower end of the mounting plate is provided with a second extending portion, and the second extending portion abuts against the upper plate. ### Claim 11 (depends on 9) The battery pack for the electric vehicle according to claim 9, wherein the lower plate comprises a first side plate, a top plate and a second side plate which are sequentially connected, the lower plate is connected with the box body of the box unit on a corresponding side through the first side plate and the second side plate, and the second end of the reinforcement beam is connected with the top plate; an end surface of the top plate is provided with a vertical rib. ### Claim 12 (depends on 7) The battery pack for the electric vehicle according to claim 7, wherein the box unit further comprises a sealing member, and the sealing member is annularly arranged at the notch of the battery cell accommodating groove and sandwiched between the box body and the box cover plate. ### Claim 13 (depends on 7) The battery pack for the electric vehicle according to claim 7, wherein a surface of the box cover plate has a reinforcement structure. ### Claim 14 (depends on 13) The battery pack for the electric vehicle according to claim 13, wherein the reinforcement structure comprises a protruding portion of the box cover plate protruding in a direction away from the box body and a reinforcement rib, and the protruding portion forms a reinforcement groove with an opening facing the direction of the box body, and the reinforcement rib is arranged in the reinforcement groove; the reinforcement groove extends along the longitudinal direction of the vehicle body longitudinal beam; there are a plurality of reinforcement ribs, and the plurality of reinforcement ribs are arranged in the reinforcement groove along the longitudinal direction of the vehicle body longitudinal beam. ### Claim 15 (depends on 7) The battery pack for the electric vehicle according to claim 7, wherein the battery pack for the electric vehicle further comprises a second electrical connector for docking with a first electrical connector on the vehicle body longitudinal beam, the second electrical connector is arranged at a position of the box corresponding to the first electrical connector, and the second electrical connector is electrically connected with the battery module; wherein the box further comprises: a cable duct, through which the battery cell accommodating grooves of the adjacent box units are connected; the cable duct is provided close to the second electrical connector. ### Claim 16 (depends on 7) The battery pack for the electric vehicle according to claim 7, wherein the battery pack for the electric vehicle further comprises a side reinforcement structure, the side reinforcement structure is arranged around the outside of the box, and the side reinforcement structure is respectively connected to an outer surface of each box body. ### Claim 17 (depends on 7) The battery pack for the electric vehicle according to claim 7, wherein the battery pack for the electric vehicle also comprises a bottom reinforcement structure, the bottom reinforcement structure is fixed on an inner bottom surface of the box body, two ends of the bottom reinforcement structure extend to an inner wall of the box body respectively. ### Claim 18 (depends on 17) The battery pack for the electric vehicle according to claim 17, wherein there are a plurality of bottom reinforcement structures, and the plurality of bottom reinforcement structures are arranged in the box body in parallel at intervals, and the battery module is carried and arranged on the plurality of bottom reinforcement structures simultaneously; and/or, there are a plurality of the locking shafts which are divided into two groups along a width direction of the vehicle body longitudinal beam, and the two groups of the locking shafts are symmetrically distributed on the box, and the box comprises three box units, the three box units are distributed at intervals, and two of the three box units are located outside the two groups of symmetrically arranged locking shafts, and the other box unit is arranged between the two groups of symmetrically arranged locking shafts. ### Claim 19 (depends on 1) An electric vehicle, comprising the longitudinal beam of the vehicle body and the battery pack for the electric vehicle according to claim 1, wherein the locking mechanism is arranged on the vehicle body longitudinal beam, and the battery pack for the electric vehicle is detachably connected to the vehicle body longitudinal beam through a cooperation of the locking shaft and the locking mechanism. ### Claim 20 (depends on 19) The electric vehicle according to claim 19, wherein the electric vehicle further comprises a vehicle body bracket, the locking mechanism is provided on the vehicle body bracket, and the vehicle body bracket is provided on the vehicle body longitudinal beam; wherein a height of a connection point between the locking mechanism and the locking shaft is higher than a height of a lower end of the vehicle body bracket or the longitudinal beam of the vehicle body; and/or, the battery pack for the electric vehicle has a plurality of the locking shafts, the locking shafts are symmetrically distributed on the box, and free ends of the locking shafts are oppositely arranged, and the locking mechanism is arranged on a back side of the vehicle body bracket; or, the battery pack for the electric vehicle has a plurality of the locking shafts, the locking shafts are symmetrically distributed on the box, and the free ends of the locking shafts are arranged back to back, and the locking mechanism is arranged on an opposite side of the vehicle body bracket.