WO2020044792A1 - バッテリパックの配置構造 - Google Patents

バッテリパックの配置構造 Download PDF

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Publication number
WO2020044792A1
WO2020044792A1 PCT/JP2019/026641 JP2019026641W WO2020044792A1 WO 2020044792 A1 WO2020044792 A1 WO 2020044792A1 JP 2019026641 W JP2019026641 W JP 2019026641W WO 2020044792 A1 WO2020044792 A1 WO 2020044792A1
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WO
WIPO (PCT)
Prior art keywords
case
cross member
floor
battery
battery pack
Prior art date
Application number
PCT/JP2019/026641
Other languages
English (en)
French (fr)
Inventor
香苗 大熊
クリストファー ラング
Original Assignee
本田技研工業株式会社
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 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to US17/271,335 priority Critical patent/US11685249B2/en
Priority to DE112019004338.2T priority patent/DE112019004338T5/de
Priority to JP2020540115A priority patent/JP7126552B2/ja
Priority to CN201980056617.6A priority patent/CN112638681B/zh
Publication of WO2020044792A1 publication Critical patent/WO2020044792A1/ja

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    • 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
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • 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
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
    • H01M50/276—Inorganic material
    • 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
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • 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
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/28—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/46—Series type
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • the present invention relates to an arrangement structure of a battery pack in which a battery pack in which a driving battery of an electric vehicle is accommodated inside a case body and a cover is arranged at a lower part of a vehicle body.
  • a recess is formed in the cover of the battery case that houses the driving battery of the electric vehicle and extends downward in the vehicle width direction and is recessed downward.
  • the battery case is made of a press-formed steel plate, and the vertical bone fixed along the side wall of the battery case is fastened to the side sill of the vehicle body with bolts.
  • it is necessary to reinforce the battery case with a reinforcing member or to provide an impact absorbing portion inside the side sill, which causes a problem of an increase in the number of parts and an increase in weight.
  • the present invention has been made in view of the above-described circumstances, and has as its object to improve the side impact resistance of a battery pack while avoiding an increase in the number of parts and weight.
  • an arrangement structure of a battery pack in which a battery pack containing a drive battery of an electric vehicle is accommodated in a case body and a cover, and arranged at a lower part of a vehicle body.
  • a battery pack containing a drive battery of an electric vehicle is accommodated in a case body and a cover, and arranged at a lower part of a vehicle body.
  • a cross member which is made of cast, and which is raised upward from the case bottom wall and extends in the vehicle width direction, is integrally formed, a first fixing portion provided on the cross member is fixed to the second floor cross member, A second fixing portion protruding outward from the case side wall in the vehicle width direction is fixed to the floor frame, and the cover is recessed toward the cross member; Are formed, the arrangement of the battery pack to the first, characterized in that overlap at least in part is proposed with the recess in the vertical direction as viewed from the second floor crossmember.
  • a protruding portion for covering an electrical component disposed above the driving battery protrudes upward from the cover, and the protruding portion is provided on the first floor.
  • a second feature of the present invention is that a battery pack is arranged between the cross member and the second floor cross member.
  • a third feature is that the case rear wall is located forward of the front end of the fuel tank or the front end of the rear subframe.
  • a pack arrangement is proposed.
  • the battery module 34 of the embodiment corresponds to the driving battery of the present invention.
  • the battery pack containing the driving battery of the electric vehicle inside the case body and the cover is arranged at the lower part of the vehicle body.
  • the cross member that protrudes upward from the case bottom wall and extends in the vehicle width direction and the second fixing portion that protrudes outward from the case side wall in the vehicle width direction are integrated with the case body. Not only can it be formed to reduce the number of parts and weight, but also the strength of the case body including the cross member and the second fixing portion can be increased to improve the side impact resistance.
  • the second fixing portion protruding outward from the case side wall in the vehicle width direction is fixed to the floor frame, the collision load of the side collision is directly transmitted from the floor frame to the cross member of the case main body to be supported. Even if the strength of the floor frame is reduced to reduce the weight, the side impact resistance can be secured, and the cover is formed with a concave portion that is depressed toward the cross member. Since the member overlaps at least partially, the battery pack can be arranged at a high position while avoiding interference with the second floor cross member, and the minimum ground clearance of the vehicle can be secured.
  • a protruding portion that covers the electrical component disposed above the driving battery protrudes upward from the cover, and the protruding portion includes a first floor cross member and a second floor cross member. Since the battery pack is disposed between the first and second floor cross members, the battery pack having the raised portion can be mounted on the vehicle body while avoiding interference with the first and second floor cross members.
  • the rear wall of the case is located forward of the front end of the fuel tank or the front end of the rear subframe, so that the battery pack does not protrude rearward and the rear seat is comfortable. Can be secured.
  • FIG. 1 is a side view of a vehicle body of a plug-in hybrid vehicle.
  • FIG. 2 is a view in the direction of arrows in FIG.
  • FIG. 3 is a sectional view taken along line 3-3 of FIG.
  • FIG. 4 is a view taken along line 4-4 in FIG.
  • FIG. 5 is an exploded perspective view of the battery pack.
  • FIG. 6 is a perspective view showing an attached state of the battery pack.
  • FIG. 7 is a view taken in the direction of arrow 7 in FIG. (First Embodiment)
  • the front-rear direction, the left-right direction (vehicle width direction), and the up-down direction in this specification are defined with reference to an occupant seated in a driver's seat.
  • an electric motor 11 for driving front wheels, an engine 12 for driving a generator for charging a battery, and an electric A power drive unit 13 including an inverter for controlling the driving of the motor 11 is mounted.
  • a pair of left and right side sills 14 extending in the front-rear direction are arranged on both left and right sides of the center of the vehicle body, and a pair of left and right floor frames 15 extending in the front-rear direction are arranged inside the left and right side sills 14 in the vehicle width direction.
  • a first floor cross member 16 extending between the left and right side sills 14 and the left and right floor frames 15 in the vehicle width direction is connected to each other, and a front and rear middle portion of the left and right side sills 14 and the left and right floor frames 15 is connected in the vehicle width direction.
  • a second floor cross member 17 extending to The first floor cross member 16 and the second floor cross member 17 are connected by a plurality of seat rails 18 extending in the front-rear direction, and a front seat 19 is supported by these seat rails 18.
  • the battery pack 21 that houses the battery that drives the electric motor 11 in the battery case 20 is supported on the lower surfaces of the left and right floor frames 15 and the second floor cross member 17.
  • a charger 22 (or a non-contact type charging pad) connected to an external power supply via a charging cable to charge the battery is disposed on the front side of the battery pack 21, and the engine 12 is disposed on the rear side of the battery pack 21.
  • a fuel tank 23 for storing driving fuel is arranged.
  • the battery case 20 includes a metal (aluminum) die-cast case main body 31 that opens upward and a metal (aluminum) die-cast cover 32 that opens downward.
  • a metal (aluminum) die-cast cover 32 that opens downward.
  • Eight battery modules 34 are mounted on the bottom of the case main body 31, and electrical components 35 such as a battery control device, a junction board, and a cell voltage sensor are arranged on the upper part thereof.
  • the shallow container-shaped case main body 31 includes a substantially flat case bottom wall 31a, a case front wall 31b, a case rear wall 31c, left and right case side walls 31d, and left and right case side walls 31d rising from the outer periphery of the case bottom wall 31a. And a cross member 31e connected in the vehicle width direction.
  • the cross member 31e of the present embodiment is an aggregate of a large number of ribs rising from the case bottom wall 31a (see FIG. 5), but the structure is arbitrary.
  • a pair of left and right cylindrical first fixing portions 31f are formed on the cross member 31e of the case main body 31, and a pair of front and rear cylindrical second fixing portions are respectively formed on outer surfaces of the left and right case side walls 31d in the vehicle width direction.
  • a portion 31g is formed.
  • the pair of front and rear second fixing portions 31g are connected by a connecting wall 31h having an L-shaped cross section extending parallel to the case side wall 31d.
  • a space opened downward is formed so as to be surrounded by the case side wall 31d, the pair of second fixing portions 31g, and the connection wall 31h, and a plurality of ribs connecting the case side wall 31d and the connection wall 31h are formed in this space.
  • 31i are formed.
  • the cover 32 of the battery case 20 is formed with a groove-shaped recess 32a that is recessed downward at a position corresponding to the cross member 31e of the case body 31, and a pair of first fixing portions 31f of the case body 31 are formed on the recess 32a.
  • a pair of overlapping bolt holes 32b are formed, and a pair of bolt holes 32c overlapping the pair of second fixing portions 31g of the case main body 31 are formed on left and right outer walls of the cover 32 in the vehicle width direction.
  • Protrusions 32d and 32e for housing the electrical components 35 are provided at the front of the cover 32 to project upward.
  • the second floor cross member 17 fixed to the lower surface of the vehicle body floor 36 overlaps the cross member 31e of the case main body 31 and the concave portion 32a of the cover 32 when viewed in the vertical direction (see FIG. 3).
  • the two bolts 37 penetrating from the bottom to the top through the two left and right first fixing portions 31f of the case main body 31 and the two left and right bolt holes 32b of the cover 32 are attached to the first case.
  • the two nuts 38 provided on the upper surface of the floor cross member 16 are screwed together, and the two left and right second fixing portions 31g of the case body 31 and the two left and right bolt holes 32c of the cover 32 are placed from bottom to top.
  • the two bolts 39 penetrating are screwed into the two nuts 40 provided on the upper surfaces of the left and right floor frames 15, thereby being fixed to the lower surface of the vehicle body floor 36.
  • the first and second fixing portions 31f and 31g can be formed integrally with the case body 31 to reduce the number of parts and the weight.
  • the strength of the case main body 31 can be increased while minimizing the increase in the number of parts and weight, thereby improving the side impact resistance.
  • two case fixing parts 31g are formed on the case side wall 31d of the case body 31 of the battery case 20 facing the floor frame 15, and two second fixing parts 31g are formed in a surface shape facing the case side wall 31d. Since the connecting wall 31h that connects the fixing portion 31g in the front-rear direction is formed integrally, when the vehicle side impacts and a collision load is input from the floor frame 15 to the case body 31 of the battery case 20, two second The collision energy can be effectively absorbed by collapsing the space surrounded by the second fixing portion 31g, the connecting wall 31h, and the case side wall 31d.
  • the second fixing portion 31g and the connecting wall 31h are formed integrally with the case body 31 made of metal die-casting, not only the number of parts can be reduced, but also the case is formed by the second fixing portion 31g and the connecting wall 31h.
  • the rigidity of the main body 31 is increased.
  • the case body 31 includes the rib 31i connecting the case side wall 31d and the connecting wall 31h in the vehicle width direction between the two second fixing portions 31g, the second fixing portion 31g and the connecting wall 31h are reinforced by the rib 31i.
  • the side impact resistance can be further improved.
  • the second fixing portion 31g protruding outward in the vehicle width direction from the case side wall 31d of the case main body 31 is fixed to the floor frame 15 with the bolt 39 and the nut 40, so that the collision load of the side collision is reduced from the floor frame 15 to the case main body 31. Is directly transmitted to and supported by the cross member 31e, the strength of the floor frame 15 can be reduced and the weight of the floor frame 15 can be reduced, so that the side collision resistance can be secured.
  • a concave portion 32a that is recessed downward toward the cross member 31e of the case body 31 is formed, and the concave portion 32a and the second floor cross member 17 of the vehicle body overlap when viewed in the vertical direction. It is possible to secure the minimum ground clearance of the vehicle by placing the battery case 20 at a high position while avoiding interference Kill.
  • the battery case 20 On the upper surface of the cover 32 of the battery case 20, raised portions 32d and 32e for housing electrical components 35 such as a battery control device, a junction board, and a cell voltage sensor are formed. Since the battery case 20 is disposed between the first floor cross member 16 and the second floor cross member 17 when viewed, the battery case 20 having the raised portions 32d and 32e while avoiding interference with the first and second floor cross members 16 and 17 is provided. Can be mounted on the vehicle body.
  • the rear case can be secured so that the battery case 20 does not project rearward.
  • a rear sub-frame may be provided at the position of the fuel tank 23, and the case rear wall 31c of the case main body 31 may be positioned forward of the front end of the rear sub-frame.
  • both the case body 31 and the cover 32 of the battery case 20 are made of metal die-cast, but the cover 32 is not necessarily made of metal die-cast.

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Abstract

バッテリパックの配置構造において、バッテリケース（２０）のケース本体（３１）は金属ダイキャスト製であるので、ケース底壁（３１ａ）から上方に隆起して車幅方向に延びるクロスメンバ（３１ｅ）と、ケース側壁（３１ｄ）から車幅方向外側に突出する第２固定部（３１ｇ）とをケース本体（３１）と一体に形成して部品点数や重量を削減できるだけでなく、クロスメンバ（３１ｅ）および第２固定部（３１ｇ）を備えるケース本体（３１）の強度を増加させて耐側面衝突性能を高めることができる。またケース側壁（３１ｄ）から車幅方向外側に突出する第２固定部（３１ｇ）がフロアフレーム（１５）に固定されるので、側面衝突の衝突荷重がフロアフレーム（１５）からケース本体（３１）のクロスメンバ（３１ｅ）に直接的に伝達されて支持されることで、フロアフレーム（１５）の強度を下げて軽量化を図っても耐側面衝突性能を確保することができる。

Description

バッテリパックの配置構造
　本発明は、電動車両の駆動用バッテリをケース本体およびカバーの内部に収容したバッテリパックを車体の下部に配置するバッテリパックの配置構造に関する。
　電動車両の駆動用バッテリを収容するバッテリケースのカバーに車幅方向に延びて下向きに窪む凹部を形成し、この凹部に車体のフロアクロスメンバを上方から嵌合させることで、フロアクロスメンバとの干渉を回避しながらバッテリケースを高い位置に配置して最低地上高を確保するものが、下記特許文献１により公知である。
日本特開２０１７－２２６３５３号公報
　ところで、上記従来のものは、バッテリケースがプレス成形した鋼板で構成されており、バッテリケースの側壁に沿って固定した縦骨がボルトで車体のサイドシルに締結されているため、バッテリケースの耐側面衝突性能を高めようとすると、バッテリケースを補強部材で補強したり、サイドシルの内部に衝撃吸収部を設けたりする必要が生じ、部品点数の増加や重量の増加の原因となる問題があった。
　本発明は前述の事情に鑑みてなされたもので、部品点数や重量の増加を回避しながらバッテリパックの耐側面衝突性能を高めることを目的とする。
　上記目的を達成するために、本発明によれば、電動車両の駆動用バッテリをケース本体およびカバーの内部に収容したバッテリパックを車体の下部に配置するバッテリパックの配置構造であって、前記車体は、前後方向に延びる左右のフロアフレームと、前記左右のフロアフレームを車幅方向に接続する前側の第１フロアクロスメンバおよび後側の第２フロアクロスメンバとを備え、前記ケース本体は金属ダイキャスト製であって、ケース底壁から上方に隆起して車幅方向に延びるクロスメンバが一体に形成され、前記クロスメンバに設けられた第１固定部は前記第２フロアクロスメンバに固定され、ケース側壁から車幅方向外側に突出する第２固定部は前記フロアフレームに固定され、前記カバーは前記クロスメンバに向かって窪む凹部が形成され、上下方向視で前記凹部と前記第２フロアクロスメンバとは少なくとも一部でオーバーラップすることを第１の特徴とするバッテリパックの配置構造が提案される。
　また本発明によれば、前記第１の特徴に加えて、前記駆動用バッテリの上部に配置された電装部品を覆う隆起部が前記カバーから上方に突出しており、前記隆起部は前記第１フロアクロスメンバおよび前記第２フロアクロスメンバ間に配置されることを第２の特徴とするバッテリパックの配置構造が提案される。
　また本発明によれば、前記第１または第２の特徴に加えて、ケース後壁は燃料タンクの前端部またはリヤサブフレームの前端部よりも前方に位置することを第３の特徴とするバッテリパックの配置構造が提案される。
　なお、実施の形態のバッテリモジュール３４は本発明の駆動用バッテリに対応する。
　本発明の第１の特徴によれば、電動車両の駆動用バッテリをケース本体およびカバーの内部に収容したバッテリパックを車体の下部に配置する。
　ケース本体は金属ダイキャスト製であるので、ケース底壁から上方に隆起して車幅方向に延びるクロスメンバと、ケース側壁から車幅方向外側に突出する第２固定部とをケース本体と一体に形成して部品点数や重量を削減できるだけでなく、クロスメンバおよび第２固定部を備えるケース本体の強度を増加させて耐側面衝突性能を高めることができる。
　またケース側壁から車幅方向外側に突出する第２固定部がフロアフレームに固定されるので、側面衝突の衝突荷重がフロアフレームからケース本体のクロスメンバに直接的に伝達されて支持されることで、フロアフレームの強度を下げて軽量化を図っても耐側面衝突性能を確保することができ、しかもカバーはクロスメンバに向かって窪む凹部が形成され、上下方向視で凹部と第２フロアクロスメンバとは少なくとも一部でオーバーラップするので、第２フロアクロスメンバとの干渉を回避しながらバッテリパックを高い位置に配置し、車両の最低地上高を確保することができる。
　また本発明の第２の特徴によれば、駆動用バッテリの上部に配置された電装部品を覆う隆起部がカバーから上方に突出しており、隆起部は第１フロアクロスメンバおよび第２フロアクロスメンバ間に配置されるので、第１、第２フロアクロスメンバとの干渉を回避しながら隆起部を有するバッテリパックを車体に搭載することができる。
　また本発明の第３の特徴によれば、ケース後壁は燃料タンクの前端部またはリヤサブフレームの前端部よりも前方に位置するので、バッテリパックが後方に突出しないようにしてリヤシートの居住性を確保することができる。
図１はプラグインハイブリッド車両の車体側面図である。（第１の実施の形態） 図２は図１の２方向矢視図である。（第１の実施の形態） 図３は図２の３－３線断面図である。（第１の実施の形態） 図４は図３の４－４線矢視図である。（第１の実施の形態） 図５はバッテリパックの分解斜視図である。（第１の実施の形態） 図６はバッテリパックの取付状態を示す斜視図である。（第１の実施の形態） 図７は図６の７方向矢視図である。（第１の実施の形態）
１５　　　　フロアフレーム
１６　　　　第１フロアクロスメンバ
１７　　　　第２フロアクロスメンバ
２１　　　　バッテリパック
２３　　　　燃料タンク
３１　　　　ケース本体
３１ａ　　　ケース底壁
３１ｃ　　　ケース後壁
３１ｄ　　　ケース側壁
３１ｅ　　　クロスメンバ
３１ｆ　　　第１固定部
３１ｇ　　　第２固定部
３２　　　　カバー
３２ａ　　　凹部
３２ｄ　　　隆起部
３２ｅ　　　隆起部
３４　　　　バッテリモジュール（駆動用バッテリ）
３５　　　　電装部品
　以下、図１～図７に基づいて本発明の実施の形態を説明する。なお、本明細書における前後方向、左右方向（車幅方向）および上下方向は運転席に着座した乗員を基準として定義される。
第１の実施の形態
　図１、図２および図４に示すように、前輪駆動のプラグインハイブリッド車両の車体前部には、前輪を駆動する電動モータ１１と、バッテリを充電する発電機を駆動するエンジン１２と、電動モータ１１の駆動を制御するインバータを備えるパワードライブユニット１３とが搭載される。
　車体中央の左右両側部には前後方向に延びる左右一対のサイドシル１４が配置されるとともに、左右のサイドシル１４の車幅方向内側には前後方向に延びる左右一対のフロアフレーム１５が配置されており、左右のサイドシル１４および左右のフロアフレーム１５の前部間が車幅方向に延びる第１フロアクロスメンバ１６で接続され、左右のサイドシル１４および左右のフロアフレーム１５の前後方向中間部間が車幅方向に延びる第２フロアクロスメンバ１７で接続される。第１フロアクロスメンバ１６および第２フロアクロスメンバ１７は前後方向に延びる複数のシートレール１８で接続されており、これらのシートレール１８にフロントシート１９が支持される。
　電動モータ１１を駆動するバッテリをバッテリケース２０内に収納するバッテリパック２１が左右のフロアフレーム１５および第２フロアクロスメンバ１７の下面に支持される。バッテリパック２１の前側には、外部電源に充電ケーブルを介して接続されてバッテリを充電するチャージャ２２（あるいは非接触式の充電パッド）が配置され、バッテリパック２１の後側には、エンジン１２を駆動する燃料を貯留する燃料タンク２３が配置される。
　図２～図７に示すように、バッテリケース２０は、上向きに開放する金属（アルミニウム）ダイキャスト製のケース本体３１と、下向きに開放する金属（アルミニウム）ダイキャスト製のカバー３２とを、それらの外周部において複数のボルト３３で上下方向に結合して構成される。ケース本体３１の底部には８個のバッテリモジュール３４が搭載され、その上部にバッテリ制御装置、ジャンクションボード、セル電圧センサ等の電装部品３５が配置される。
　浅い容器状のケース本体３１は、略平坦なケース底壁３１ａと、ケース底壁３１ａの外周から起立するケース前壁３１ｂ、ケース後壁３１ｃおよび左右のケース側壁３１ｄと、左右のケース側壁３１ｄを車幅方向に接続するクロスメンバ３１ｅとを備える。本実施の形態のクロスメンバ３１ｅは、ケース底壁３１ａから起立する多数のリブの集合体であるが（図５参照）、その構造は任意である。ケース本体３１のクロスメンバ３１ｅ上には左右一対の円筒状の第１固定部３１ｆが形成され、また左右のケース側壁３１ｄの車幅方向の外面には、それぞれ前後一対の円筒状の第２固定部３１ｇが形成される。前後一対の第２固定部３１ｇは、ケース側壁３１ｄに対して平行に延びるＬ字状断面の連結壁３１ｈで接続される。その結果、ケース側壁３１ｄ、一対の第２固定部３１ｇおよび連結壁３１ｈに囲まれるように下向きに開放する空間が形成され、この空間内にケース側壁３１ｄおよび連結壁３１ｈを接続する複数枚のリブ３１ｉが形成される。
　バッテリケース２０のカバー３２は、ケース本体３１のクロスメンバ３１ｅに対応する位置に下向きに窪む溝状の凹部３２ａが形成され、この凹部３２ａ上にケース本体３１の一対の第１固定部３１ｆに重なる一対のボルト孔３２ｂが形成され、またカバー３２の左右の車幅方向外壁にケース本体３１の一対の第２固定部３１ｇに重なる一対のボルト孔３２ｃが形成される。カバー３２の前部には電装部品３５を収納する隆起部３２ｄ，３２ｅが上向きに突設される。
　車体フロア３６の下面に固定された第２フロアクロスメンバ１７は、上下方向視でケース本体３１のクロスメンバ３１ｅおよびカバー３２の凹部３２ａに重なっている（図３参照）。
　このように構成されたバッテリケース２０は、ケース本体３１の左右２個の第１固定部３１ｆおよびカバー３２の左右２個のボルト孔３２ｂを下から上に貫通する２本のボルト３７を第１フロアクロスメンバ１６の上面に設けた２個ナット３８に螺合するとともに、ケース本体３１の左右各２個の第２固定部３１ｇおよびカバー３２の左右各２個のボルト孔３２ｃを下から上に貫通する各２本のボルト３９を左右のフロアフレーム１５の上面に設けた各２個ナット４０に螺合することで、車体フロア３６の下面に固定される。
　次に、上記構成を備えた本発明の実施の形態の作用を説明する。
　ケース本体３１およびカバー３２よりなるバッテリケース２０は金属ダイキャスト製であるため、その第１、第２固定部３１ｆ，３１ｇをケース本体３１と一体に形成して部品点数や重量を削減できるだけでなく、ケース本体３１にクロスメンバ３１ｅを一体に形成することで、部品点数や重量の増加を最小限に抑えながらケース本体３１の強度を増加させて耐側面衝突性能を高めることができる。
　すなわち、フロアフレーム１５に対向するバッテリケース２０のケース本体３１のケース側壁３１ｄには、前後２個の第２固定部３１ｇと、ケース側壁３１ｄに対向する面形状に形成されて２個の第２固定部３１ｇを前後方向に連結する連結壁３１ｈとが一体に形成されるので、車両が側面衝突して衝突荷重がフロアフレーム１５からバッテリケース２０のケース本体３１に入力したとき、２個の第２固定部３１ｇ、連結壁３１ｈおよびケース側壁３１ｄに囲まれた空間が潰れることで衝突エネルギーを効果的に吸収することができる。
　このとき、第２固定部３１ｇの車幅方向外端はフロアフレーム１５の車幅方向外端よりも車幅方向内側に位置するので、側面衝突の衝突荷重をフロアフレーム１５で優先的に支持し、受けきれなかった衝突荷重をバッテリケース２０で受けることで、バッテリケース２０の損傷を最小限に抑えることができる。
　また第２固定部３１ｇおよび連結壁３１ｈは金属ダイキャスト製のケース本体３１と一体に形成されるので、部品点数の削減が可能になるだけでなく、第２固定部３１ｇおよび連結壁３１ｈでケース本体３１の剛性が高められる。しかもケース本体３１は２個の第２固定部３１ｇ間にケース側壁３１ｄおよび連結壁３１ｈを車幅方向に連結するリブ３１ｉを備えるので、第２固定部３１ｇおよび連結壁３１ｈをリブ３１ｉで補強して耐側面衝突性能を一層高めることができる。
　さらにケース本体３１のケース側壁３１ｄから車幅方向外側に突出する第２固定部３１ｇがフロアフレーム１５にボルト３９およびナット４０で固定されるので、側面衝突の衝突荷重がフロアフレーム１５からケース本体３１のクロスメンバ３１ｅに直接的に伝達されて支持されることで、フロアフレーム１５の強度を下げて軽量化を図っても耐側面衝突性能を確保することができ、またバッテリケース２０のカバー３２はケース本体３１のクロスメンバ３１ｅに向かって下向きに窪む凹部３２ａが形成され、この凹部３２ａと車体の第２フロアクロスメンバ１７とは上下方向視でオーバーラップするので、第２フロアクロスメンバ１７との干渉を回避しながらバッテリケース２０を高い位置に配置し、車両の最低地上高を確保することができる。
　しかもバッテリケース２０のカバー３２の上面には、バッテリ制御装置、ジャンクションボード、セル電圧センサ等の電装部品３５を収納する隆起部３２ｄ，３２ｅが形成されるが、この隆起部３２ｄ，３２ｅは上下方向視で第１フロアクロスメンバ１６および第２フロアクロスメンバ１７間に配置されるので、第１、第２フロアクロスメンバ１６，１７との干渉を回避しながら隆起部３２ｄ，３２ｅを有するバッテリケース２０を車体に搭載することができる。
　またバッテリケース２０のケース後壁３１ｃは燃料タンク２３の前端部よりも前方に位置するので、バッテリケース２０が後方に突出しないようにしてリヤシートの居住性を確保することができる。
　以上、本発明の実施の形態を説明したが、本発明はその要旨を逸脱しない範囲で種々の設計変更を行うことが可能である。
　例えば、燃料タンク２３の位置にリヤサブフレームを設け、ケース本体３１のケース後壁３１ｃをリヤサブフレームの前端部よりも前方に位置させても良い。
　また実施の形態ではバッテリケース２０のケース本体３１およびカバー３２の両方が金属ダイキャスト製であるが、カバー３２は必ずしも金属ダイキャスト製である必要ではない。

Claims (3)

  1. 　電動車両の駆動用バッテリ（３４）をケース本体（３１）およびカバー（３２）の内部に収容したバッテリパック（２１）を車体の下部に配置するバッテリパックの配置構造であって、
    　前記車体は、前後方向に延びる左右のフロアフレーム（１５）と、前記左右のフロアフレーム（１５）を車幅方向に接続する前側の第１フロアクロスメンバ（１６）および後側の第２フロアクロスメンバ（１７）とを備え、
    　前記ケース本体（３１）は金属ダイキャスト製であって、ケース底壁（３１ａ）から上方に隆起して車幅方向に延びるクロスメンバ（３１ｅ）が一体に形成され、前記クロスメンバ（３１ｅ）に設けられた第１固定部（３１ｆ）は前記第２フロアクロスメンバ（１７）に固定され、ケース側壁（３１ｄ）から車幅方向外側に突出する第２固定部（３１ｇ）は前記フロアフレーム（１５）に固定され、
    　前記カバー（３２）は前記クロスメンバ（３１ｅ）に向かって窪む凹部（３２ａ）が形成され、上下方向視で前記凹部（３２ａ）と前記第２フロアクロスメンバ（１７）とは少なくとも一部でオーバーラップすることを特徴とするバッテリパックの配置構造。
  2. 　前記駆動用バッテリ（３４）の上部に配置された電装部品（３５）を覆う隆起部（３２ｄ，３２ｅ）が前記カバー（３２）から上方に突出しており、前記隆起部（３２ｄ，３２ｅ）は前記第１フロアクロスメンバ（１６）および前記第２フロアクロスメンバ（１７）間に配置されることを特徴とする、請求項１に記載のバッテリパックの配置構造。
  3. 　ケース後壁（３１ｃ）は燃料タンク（２３）の前端部またはリヤサブフレームの前端部よりも前方に位置することを特徴とする、請求項１または請求項２に記載のバッテリパックの配置構造。
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