WO2023079687A1 - 電動車両の電池パック構造 - Google Patents

電動車両の電池パック構造 Download PDF

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Publication number
WO2023079687A1
WO2023079687A1 PCT/JP2021/040801 JP2021040801W WO2023079687A1 WO 2023079687 A1 WO2023079687 A1 WO 2023079687A1 JP 2021040801 W JP2021040801 W JP 2021040801W WO 2023079687 A1 WO2023079687 A1 WO 2023079687A1
Authority
WO
WIPO (PCT)
Prior art keywords
cross member
battery pack
tray
notch
electric vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/040801
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
拓哉 寺内
信義 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to EP21963282.5A priority Critical patent/EP4429000A4/en
Priority to JP2022524638A priority patent/JP7244811B1/ja
Priority to US18/578,271 priority patent/US20240383344A1/en
Priority to PCT/JP2021/040801 priority patent/WO2023079687A1/ja
Priority to CN202180102348.XA priority patent/CN117957702A/zh
Publication of WO2023079687A1 publication Critical patent/WO2023079687A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0438—Arrangement under the floor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery pack structure for electric vehicles.
  • Patent Literature 1 discloses a battery structure installed in the rear luggage compartment of a vehicle, in which a partition plate is arranged so as to divide the battery housing case into upper and lower sides, and a battery module is installed on the lower side of the partition plate.
  • high-voltage equipment is installed on the partition plate.
  • the partition plate is provided with a bent portion, and when rear-collided by another vehicle or the like, the partition plate is deformed upward with the bent portion as a boundary to separate from the battery module for protection.
  • Patent Document 2 in a battery pack mounted on a vehicle, a plurality of crossing members extending in the vehicle width direction are arranged side by side in the front-rear direction at predetermined intervals, and when the battery pack is side-collided by another vehicle It is designed to protect the battery module housed in the
  • Patent Document 1 merely deforms the partition plate in an expected deformation mode for the purpose of protecting the battery module.
  • Patent Document 2 improves the rigidity of the battery pack by arranging a plurality of crossing members inside, the effect is limited to protection of the internal battery modules.
  • the impact load is input to the battery pack from the side, so it not only protects the internal battery modules, but also distributes and absorbs the impact load to each part of the vehicle body to reduce vehicle deformation.
  • the techniques of each patent document are sufficient for this demand.
  • the present invention was made in order to solve such problems, and its object is to distribute and absorb the collision load input in the event of a side collision to each part of the vehicle body, thereby reducing the deformation of the vehicle body.
  • a battery pack structure for an electric vehicle includes a tray containing battery modules, and a battery module disposed across the tray and vertically spaced apart from each other in the entire longitudinal direction.
  • a hollow cross member formed with an upper structural wall and a lower structural wall extending continuously over the cross member;
  • a pair of reinforcements joined to the outside of the side surface of the tray on the extension line of at least one of the lower structural walls.
  • the upper structural wall and the lower structural wall of the cross member are continuous over the entire longitudinal direction of the cross member at vertically spaced positions.
  • the load path structure is formed on the path along the cross member that crosses the battery pack. It is formed. Therefore, the collision load in the event of a side collision is transmitted to one reinforcement, the cross member, and the other reinforcement, and dispersed and absorbed toward the vehicle body.
  • the battery modules are bisected by being spaced apart in the longitudinal direction of the cross member, and the cross member has upper and/or lower edges corresponding to the gaps between the battery modules.
  • a notch may be formed to narrow the vertical width.
  • the region of the cross member where the notch is formed functions as a crushable zone and deforms, so that the deformation of the regions corresponding to both sides of the notch is suppressed, and the battery modules installed in this region. damage is prevented.
  • the hollow cross member can easily adjust the deformation mode when a collision load is input, the cross member can be deformed in a desired deformation mode in the event of a side collision.
  • the battery modules are bisected in the longitudinal direction of the cross member, and the cross member has an upper edge and/or a lower edge corresponding to the gap between the battery modules.
  • a first notch may be formed on one of the two, and a second notch may be formed on the other to narrow the vertical width.
  • the region where the first notch of the cross member is formed functions as a crushable zone and deforms, so the deformation of the regions corresponding to both sides of the notch is suppressed, and the cross member is installed in this region. Damage to the battery module is prevented.
  • the hollow cross member facilitates adjustment of the deformation mode when a collision load is applied. Further, since the first and second notches are formed in the upper edge and lower edge of the cross member, it becomes easier to adjust the deformation mode, and the cross member can be deformed in the desired deformation mode in the event of a side collision. .
  • the second notch may have a stepped shape that descends from both sides of the cross member toward the center.
  • the second notch has a stepped shape that descends from both sides of the cross member to the center, both sides of the cross member have a sufficient vertical width, and the batteries positioned on both sides are particularly susceptible to damage in the event of a side collision. Module can be protected.
  • the stepped notch of the cross member tends to cause stress concentration when transmitting the collision load, so that it is easier to adjust the deformation mode.
  • the cross member may be arranged directly above an underfloor cloth fixed to the lower surface of the tray in order to support the battery pack on the vehicle body side.
  • the collision load input at the time of a side collision can be well dispersed and absorbed by each part of the vehicle body, and the deformation of the vehicle body can be reduced.
  • FIG. 1 is a plan view showing a battery pack structure for an electric vehicle according to a first embodiment
  • FIG. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1 showing a cross member arranged inside the battery pack
  • FIG. 3 is a detailed view of part A in FIG. 2 showing the relationship between the details of the cross member and the reinforcement.
  • FIG. 4 is a schematic diagram corresponding to FIG. 3 showing a deformation state of the cross member at the time of side collision; It is a figure corresponding to FIG. 3 which shows 2nd Embodiment which changed the cross-sectional shape of reinforcement.
  • FIG. 1 is a plan view showing the battery pack structure of an electric vehicle according to the present embodiment
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 showing cross members arranged in the battery pack
  • FIG. 3 is a detailed view of part A in FIG. 2 showing the relationship with reinforcement.
  • the electric vehicle of this embodiment is configured as a plug-in hybrid vehicle that is equipped with a motor and an engine as power sources for running, and that can be charged from an external charging facility with a battery pack that is a power source for running.
  • the battery pack is mounted under the floor of the vehicle body in the posture shown in FIG.
  • the tray 2 of the battery pack 1 has a substantially square shape in plan view, and a total of eight battery modules 3 are housed inside.
  • Two battery modules 3 are used as one set, and a total of four battery modules 3 are arranged side by side in the front, rear, left, and right directions. In other words, each set of battery modules 3 is divided into front and rear and left and right, respectively.
  • a device space 4 is formed in front of the battery modules 3 in the tray 2 .
  • the left and right battery modules 3 are spaced apart, and an equipment space 5 (corresponding to the "gap" of the present invention) is formed therebetween.
  • these equipment spaces 4 and 5 accommodate electrical equipment such as a BMU (battery module unit) that controls and controls the charging and discharging performance of the battery module and a junction box that connects and disconnects the battery circuit. It is a BMU (battery module unit) that controls and controls the charging and discharging performance of the battery module and a junction box that connects and disconnects the battery circuit. It is a
  • a pair of left and right side frames 6 , a front frame 7 and a rear frame 8 surround the tray 2 in plan view.
  • the upper portion 6a of the side frame 6 is welded to the side surface 2a of the tray 2
  • the lower portion 6b is welded to the lower surface 2b of the tray 2, thereby forming a closed cross section with the tray 2.
  • a plurality of underfloor cloths 9 are fixed to the lower surface 2b of the tray 2 at predetermined intervals in the front-rear direction. It suspends and supports the tray 2.
  • the front and rear battery modules 3 are arranged slightly apart and the cross member 11 is arranged between them, and the front and rear position of the cross member 11 is also directly above one of the plurality of underfloor cloths 9 .
  • the cross member 11 of the present embodiment is made of an extruded aluminum material, and has a plate-like shape extending linearly in the horizontal direction as a whole, and is disposed so as to traverse the inside of the tray 2 . Both left and right ends of the cross member 11 are opposed to the inside of the side surface 2a of the tray 2 with a small gap therebetween.
  • the cross member 11 when viewed from the side, has a vertically elongated rectangular cross section, and has a hollow shape in which a front wall 11e and a rear wall 11f are connected to each other by four horizontal structural walls 11a to 11d. None.
  • Each of the structural walls 11a-11d extends over the entire longitudinal direction of the cross member 11, and both left and right ends of the cross member 11 are open.
  • the structural walls are hereinafter referred to as first to fourth structural walls 11a to 11d in order from the top.
  • the first structural wall 11a forms the upper surface of the cross member 11, and below it, second to fourth structural walls 11b to 11d are arranged vertically at predetermined intervals, respectively. 11f extends further downward from the fourth structural wall 11d.
  • a total of eight bolt insertion pipes 12a to 12d are inserted and fixed to the cross member 11 from above at predetermined intervals in the left-right direction.
  • the outermost two are referred to as first bolt insertion pipes 12a
  • the inner two are referred to as second bolt insertion pipes 12b
  • the inner two are referred to as third bolt insertion pipes 12c
  • the innermost two are referred to as third bolt insertion pipes 12b.
  • This is called a 4-bolt insertion tube 12d.
  • the first and second bolt insertion pipes 12a and 12b penetrate all structural walls 11a to 11d
  • the third bolt insertion pipe 12c penetrates the second to fourth structural walls 11b to 11d
  • the fourth bolt insertion pipe 12d The lower ends of all the bolt insertion tubes 12a to 12d penetrating through the third and fourth structural walls 11c and 11dd are positioned near the lower surface 2b of the tray 2. As shown in FIG.
  • brackets 13a and 13b are arranged in the horizontal direction along the cross member 11 and welded to the lower surface 2b respectively.
  • plugs 14 are welded at positions corresponding to the lower ends of the first bolt insertion tubes 12a, respectively, and a female screw 14a formed in each plug 14 opens upward.
  • plugs 14 are welded at positions corresponding to the lower ends of the second to fourth bolt insertion pipes 12b to 12d, respectively. It is open.
  • a bolt 15 (only the tip is shown in FIG.
  • the upper and lower edges of the cross member 11 are notched stepwise, thereby forming an upper notch 16 (corresponding to the "notch, first notch” of the present invention) in the upper edge and is formed with a lower notch 17 (corresponding to the "second notch” of the present invention).
  • the upper notch 16 in the area between the left and right second bolt insertion pipes 12b of the cross member 11 (the area inside each other), the second structure wall 11b is left and the upper part (front wall 11e and The rear wall 11f and the first structural wall 11a) are notched.
  • the upper portions (the front wall 11e, the rear wall 11f, and the second structural wall 11b) are notched while leaving the third structural wall 11c.
  • the upper edge of the cross member 11 is formed with a stepped upper notch 16 descending in two steps from both left and right sides toward the center.
  • the lower notch 17 is formed in correspondence with the front equipment space 5 having a narrower lateral width.
  • the upper notch 16 and the lower notch 17 are reversed so that the upper edge of the cross member 11 is notched in a shape corresponding to the lower notch 17 and the lower edge is notched in a shape corresponding to the upper notch 16.
  • the third structural wall 11c (corresponding to the "upper structural wall” of the present invention) and the fourth structural wall 11d (the “lower structural wall” of the present invention) ) remains unnotched.
  • the third and fourth structural walls 11c and 11d are continuously continuous over the entire longitudinal direction of the cross member 11 at positions separated from each other in the vertical direction.
  • each reinforcement 18 has a short front-rear length including the cross member 11 and its vicinity in the front-rear direction. As shown in FIG. 3, each reinforcement 18 has a shape in which an upper flange portion 18b and a lower flange portion 18c extend from a body portion 18a.
  • each reinforcement 18 forms a closed cross section with the side surface 2a.
  • the upper flange portion 18b of each reinforcement 18 is welded to the outside of the side surface 2a of the tray 2 on the extension line of the third structural wall 11c of the cross member 11 in the vertical direction.
  • the lower flange portion 18c of each reinforcement 18 is welded to the outside of the side surface 2a of the tray 2 on the extension line of the fourth structural wall 11d of the cross member 11 in the vertical direction.
  • each of frames 6 to 8 forming a closed cross section around battery pack 1 functions as a load path structure.
  • the collision load is distributed from the right side frame 6 through the front frame 7 to the left side frame 6, and further to the vehicle body side.
  • it is dispersed to the left side frame 6 via the rear frame 8.
  • the cross member 11 and the left and right reinforcements 18 cooperate to form a load path structure on the path along the cross member 11 that traverses the battery pack 1 as indicated by arrow F4. As shown, the crash load is distributed over this path.
  • the collision load is distributed to the reinforcement 18 via the side frame 6, and deforms the reinforcement 18 to the left.
  • the upper and lower flange portions 18b and 18c of the reinforcement 18 are welded to the outside of the side surface 2a of the tray 2 respectively on the extension lines of the third and fourth structural walls 11c and 11d of the cross member 11 in the vertical direction.
  • the flanges 18b and 18c deform the side surface 2a of the tray 2. , collide with and press against the right ends of the corresponding structural walls 11c and 11d.
  • the crash load is transferred quickly and efficiently to each structural wall 11c, 11d of the cross member 11 via the reinforcement 18. As shown in FIG.
  • the cross member 11 and the left and right reinforcements 18 also function as a load path structure, so that the impact load input by the side collision is well distributed to each part of the vehicle body. It is possible to reduce the deformation of the vehicle body.
  • the formation of the upper and lower notches 16 and 17 in the cross member 11 also contributes to preventing the battery module 3 from being damaged.
  • the vertical width of the cross member 11 is narrowest in the lateral center area (indicated by L in FIG. 2) due to the upper and lower cutouts 16 and 17.
  • the vertical width is narrowest in the area of the corresponding lower notch 17 . Therefore, when a collision load due to a side collision is input from the right side, the cross member 11 transmits the collision load from the right side to the left side while largely deforming mainly the area of the lower notch 17 as shown in FIG. , the lower surface 2b of the tray 2 is also deformed following the deformed state of the cross member 11. As shown in FIG.
  • the region of the lower notch 17 of the cross member 11 functions as a crushable zone and deforms before other regions, thereby suppressing the deformation of the regions corresponding to both sides of the lower notch 17 . Therefore, deformation of the areas of the lower surface 2b of the tray 2 corresponding to both sides of the lower notch 17 is also suppressed, and damage to the battery modules 3 installed in these areas can be more reliably prevented.
  • the cross member 11 is provided with not only the lower notch 17 but also the upper notch 16, together with the internal structure of the cross member 11 having a hollow shape, enables the desired deformation mode to be achieved. contribute significantly. That is, the cross member 11 is made of aluminum and has a hollow shape, and such material and internal structure make it easy to adjust the deformation mode of the cross member 11 when a collision load is input. Further, compared with the case where the notch 17 is formed only on the lower edge of the cross member 11, the deformation mode can be easily adjusted when the notch 16 is also formed on the upper edge.
  • the upper notch 16 is cut in a stepped manner, stress concentration is more likely to occur when transmitting a collision load than in the case of, for example, an oblique notch, and this point is also deformed. It becomes a factor that makes it easier to adjust the mode. As a result, the cross member 11 can be deformed in the desired deformation mode in the event of a side collision, thereby further reliably preventing damage to the battery modules 3 .
  • the upper notch 16 is formed in consideration of the deformation mode of the cross member 11 in this way, its area is mainly limited to the center of the cross member 11 in the left and right direction.
  • the left and right sides of the cross member 11 have substantially the same vertical width as the side surface 2a of the tray 2, and the battery modules 3 located on the left and right sides, which are particularly susceptible to damage in the event of a side collision, are placed on the cross member. 11 can be protected.
  • the cross member 11 is arranged directly above the underfloor cloth 9 in the front-rear direction, which is also a desirable structure for preventing the battery pack 1 from being damaged. That is, since the cross member 11 having high rigidity and the underfloor cloth 9 are aligned in the front-rear direction, the rigidity of the battery pack 1 can be increased, thereby further protecting the battery modules 3.
  • the upper end of the upper flange portion 18b and the lower end of the lower flange portion 18c of the reinforcement 18 form a shape floating from the side surface 2a of the tray 2, in other words, a warped shape. It functions as a rib 18d.
  • the upper flange portion 18b is vertically welded to the side surface 2a of the tray 2 on the extension line of the third structural wall 11c of the cross member 11, and the lower flange portion 18c is vertically welded to the cross member 11. is welded to the side surface 2a of the tray 2 on the extension line of the fourth structural wall 11d. Therefore, although redundant explanation is omitted, the collision load can be quickly and efficiently transmitted to the structural walls 11c and 11d of the cross member 11 via the reinforcement 18 in the event of a side collision, thereby providing the same structure as in the first embodiment. effect can be achieved.
  • the battery pack is intended for a plug-in hybrid vehicle, but the present invention is not limited to this, and may be applied to an ordinary hybrid vehicle or an electric vehicle equipped with only a motor.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Battery Mounting, Suspending (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Body Structure For Vehicles (AREA)
PCT/JP2021/040801 2021-11-05 2021-11-05 電動車両の電池パック構造 Ceased WO2023079687A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP21963282.5A EP4429000A4 (en) 2021-11-05 2021-11-05 ELECTRIC VEHICLE BATTERY PACK STRUCTURE
JP2022524638A JP7244811B1 (ja) 2021-11-05 2021-11-05 電動車両の電池パック構造
US18/578,271 US20240383344A1 (en) 2021-11-05 2021-11-05 Cell pack structure for electric vehicle
PCT/JP2021/040801 WO2023079687A1 (ja) 2021-11-05 2021-11-05 電動車両の電池パック構造
CN202180102348.XA CN117957702A (zh) 2021-11-05 2021-11-05 电动车辆的电池包结构

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/040801 WO2023079687A1 (ja) 2021-11-05 2021-11-05 電動車両の電池パック構造

Publications (1)

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WO2023079687A1 true WO2023079687A1 (ja) 2023-05-11

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PCT/JP2021/040801 Ceased WO2023079687A1 (ja) 2021-11-05 2021-11-05 電動車両の電池パック構造

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US (1) US20240383344A1 (https=)
EP (1) EP4429000A4 (https=)
JP (1) JP7244811B1 (https=)
CN (1) CN117957702A (https=)
WO (1) WO2023079687A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2025035196A (ja) * 2023-09-01 2025-03-13 トヨタ自動車株式会社 電池パック

Citations (5)

* Cited by examiner, † Cited by third party
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JP2009083600A (ja) * 2007-09-28 2009-04-23 Mitsubishi Motors Corp 電気自動車
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