WO2021066180A1 - 自動車の下部構造 - Google Patents
自動車の下部構造 Download PDFInfo
- Publication number
- WO2021066180A1 WO2021066180A1 PCT/JP2020/037658 JP2020037658W WO2021066180A1 WO 2021066180 A1 WO2021066180 A1 WO 2021066180A1 JP 2020037658 W JP2020037658 W JP 2020037658W WO 2021066180 A1 WO2021066180 A1 WO 2021066180A1
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- WO
- WIPO (PCT)
- Prior art keywords
- battery
- floor
- automobile
- vehicle body
- load
- Prior art date
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Classifications
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- 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
-
- 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
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
-
- 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
- B62D21/157—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 for side impacts
-
- 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
- B62D25/02—Side panels
- B62D25/025—Side sills thereof
-
- 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
- B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
- B62D25/2036—Floors or bottom sub-units in connection with other superstructure subunits the subunits being side panels, sills or pillars
-
- 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
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/005—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric storage means
-
- 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
- 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
- B60K2001/0455—Removal or replacement of the energy storages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/91—Electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection
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- 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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to the substructure of an automobile.
- the battery Since the battery has a high specific gravity and is relatively heavy, a large load is applied to the battery when a car equipped with the battery collides. Deformation of a loaded battery can cause the battery to ignite or leak. Therefore, when the battery is housed in a container such as a battery box and attached to the vehicle body, the container needs to have high structural rigidity. This is because if the rigidity of the container is low, the container may be broken and the battery may be deformed at the time of a collision, and the container containing the battery may be separated from the vehicle body.
- the battery pack described in Patent Document 1 includes a high-rigidity member such as a battery cross member and a vertical bone.
- the battery pack described in Patent Document 2 includes a highly rigid side wall portion, a front wall portion, and a rear wall portion made of an extruded product.
- the battery pack described in Patent Document 3 includes an in-pack cloth which is a highly rigid skeleton member that protects the battery pack.
- the battery frame described in Patent Document 4 includes a highly rigid second cross member below the ICU.
- the battery case described in Patent Document 5 includes first to fourth cross members having high rigidity.
- the battery pack described in Patent Document 6 includes a subcross member in the battery frame.
- an object of the present invention is to provide an automobile substructure capable of mounting a battery in an automobile with a simple configuration and efficiently transmitting a load at the time of a collision.
- the gist of this disclosure is as follows.
- a substructure of an automobile comprising a vehicle body floor constituting the floor portion of the automobile, and a battery cell or a battery module directly suspended from the vehicle body floor and fixed to the lower side of the vehicle body floor.
- the battery cell or the battery module is further provided with a cooling panel through which a cooling liquid circulates, and the battery cell or the battery module is fixed to the vehicle body floor with the cooling panel interposed between the battery cell or the battery module.
- the vehicle body floor is arranged on the floor panel and has a cross member extending in the left-right direction of the automobile, and the battery cell or the battery module is fixed to the floor panel or the cross member.
- the vehicle body floor has a side sill extending in the front-rear direction of the automobile at the outermost side in the left-right direction of the automobile, and the floor panel is provided between the left and right side sill.
- the present invention it is possible to mount a battery in an automobile with a simple configuration, and it is possible to provide an automobile substructure capable of efficiently transmitting a load at the time of a collision.
- FIG. 4 is a schematic view showing an enlarged vicinity of the side sill.
- FIG. 5 is a schematic view showing an enlarged vicinity of the side sill.
- the automobile substructure 100 according to the present embodiment relates to a substructure of an automobile equipped with a battery such as an electric vehicle.
- This substructure has a structure in which the battery cell or battery module of the automobile is directly fixed to the members constituting the vehicle body floor of the automobile.
- FIG. 1 is a schematic view for explaining the lower structure 100 of the automobile according to the present embodiment, and is a plan view of the lower structure 100 of the automobile as viewed from above.
- FIG. 2 is a view of the lower structure 100 of the automobile as viewed from below.
- FIG. 3 is a schematic view showing a cross section along the alternate long and short dash line I-I'in FIG. In FIG. 2, the undercover 18 is not shown.
- the vehicle body floor 110 includes a floor panel 12, floor cross members 14a to 14f, front bumper 15, front side members 16a and 16b, rear side members 17a and 17b, undercover 18, rear bumper 19, side sill 20 and the like. have.
- the side sill 20 extends in the front-rear direction (vehicle length direction, y-axis direction shown in the figure) along the left and right side surfaces of the vehicle.
- the floor cross members 14a to 14f extend in the left-right direction (vehicle width direction, x-axis direction shown in the drawing) of the automobile.
- the z-axis direction shown in the figure is a direction orthogonal to both the x-axis and the y-axis, and indicates the height direction of the automobile (vehicle height direction).
- Each of the floor cross members 14a to 14f is joined to each of the left and right side sills 20 at both ends by welding, riveting, bolting or the like (hereinafter referred to as welding or the like).
- the floor cross member 14a located on the frontmost side and the floor cross member 14f located on the rearmost side have the same thickness as the side sill 20 in the vertical direction.
- the floor cross members 14b to 14e are arranged so as to extend in the vehicle width direction within the area surrounded by the left and right side sills 20, the floor cross member 14a, and the floor cross member 14f. As shown in FIG. 3, the upper surfaces of the floor cross members 14a and 14f, the floor cross members 14b to 14d, and the side sills 20 are arranged at substantially the same positions. The lower surfaces of the floor cross members 14b to 14e are arranged at the same position in the vertical direction, and are located above the lower surfaces of the floor cross members 14a and 14f and the side sill 20.
- Floor panels 12 are arranged under the floor cross members 14b to 14e.
- the floor panel 12 is fixed to the floor cross members 14a to 14f and the side sill 20 by welding or the like.
- the floor cross members 14a to 14f may be made of a hat material (cross-section hat-shaped member), or the flange of the hat material may be joined to the floor panel 12. Further, the floor cross members 14a to 14f may be formed of a hollow tubular member, or may have a rectangular cross section orthogonal to the longitudinal direction.
- Two front side members 16a and 16b extend in the vehicle length direction inside the side sill 20 in the vehicle width direction. As shown in FIG. 2, the rear ends of the front side members 16a and 16b may be in contact with the floor cross member 14f and fixed to the floor cross member 14f by welding or the like.
- the vertical position of the lower surface of the front side member 16b may coincide with the position of the lower surface of the floor cross members 14a and 14f, and may be higher than the lower surface by the thickness of the undercover 18. It may be located in. Further, the vertical position of the lower surface of the front side member 16b may coincide with the position of the lower surface of the side sill 20, or may be located above the lower surface by the thickness of the undercover 18. The vertical position of the lower surface of the front side member 16a may coincide with the position of the lower surface of the front side member 16b.
- the upper surfaces of the front side members 16a and 16b may be in contact with the floor panel 12, or may be fixed to the floor panel 12 by welding or the like.
- the floor cross member 14a may be provided with a groove-shaped retracting portion 14a'.
- the front side members 16a and 16b may be inserted into these retracting portions 14a'and are joined to the floor cross member 14a by welding or the like. You may be.
- the front bumper 15 may be fixed to the front end of the front side members 16a and 16b.
- Two rear side members 17a and 17b extend in the vehicle length direction behind the floor cross member 14f.
- the front ends of the rear side members 17a and 17b may be fixed to the floor cloth member 14f by welding or the like.
- the rear bumper 19 may be fixed to the rear end of the rear side members 17a and 17b.
- a cross member 17c that connects the rear side member 17a and the rear side member 17b may be arranged in the middle of the rear side members 17a and 17b in the front-rear direction.
- the end portion of the cross member 17c may be fixed to each of the rear side member 17a and the rear side member 17b by welding or the like.
- FIG. 4 is a schematic view showing a cross section along the alternate long and short dash line II-II'in FIG.
- the floor panel 12 is arranged under the floor cross member 14c, and the front side members 16a and 16b are arranged under the floor panel 12.
- the front side members 16a and 16b are joined to the floor panel 12 by welding or the like.
- the side sill 20 has a hollow structure in a cross section orthogonal to the longitudinal direction.
- energy absorbing members 22 are arranged so as to correspond to the positions of the floor cross members 14a to 14f in the vertical direction.
- the energy absorbing member 22 is made of, for example, an extruded aluminum material or a steel structure, and when the energy absorbing member 22 is an extruded aluminum material, the extrusion direction coincides with the longitudinal direction of the floor cross members 14a to 14f. It may be in the direction of
- FIG. 5 is a schematic view showing a cross section along the alternate long and short dash line III-III' of FIG.
- the cross-sectional structure shown in FIG. 5 is the same as that of FIG. 4 except that the floor cross member 14c does not exist.
- the area inside the side sill 20 and below the floor panel 12 is the area where the battery 50 is mounted.
- the undercover 18 covers the lower side of the battery 50 and is fixed to the lower surfaces of the front side members 16a and 16b or the lower surface of the side sill 20.
- the basic structure of the vehicle body floor 110 is composed of the side sill 20, the floor cross members 14a to 14f, the front side members 16a and 16b, and the floor panel 12.
- the rear side members 17a and 17b, the front bumper 15, the undercover 18, the rear bumper 19, and the like may be attached to this basic structure.
- the battery 50 is attached to the lower side of the vehicle body floor 110 and is suspended from the vehicle body floor 110.
- the battery 50 according to this embodiment is a battery cell or a battery module.
- a battery pack for a vehicle that houses a plurality of battery modules and has collision resistance is not included in the battery 50 in this embodiment.
- the battery pack may be referred to as a battery box, a battery case, an IPU case, a battery housing, or the like, but all of them have a structure having collision resistance.
- a battery cell is a unit cell in which a common electrolyte is contained in one housing (case), and a battery module is an aggregate in which a plurality of battery cells are bundled.
- a liquid or solid electrolyte is used as the electrolyte contained in the battery cell.
- the battery pack is provided with, for example, a structure (skeleton, etc.) for increasing the rigidity for the purpose of improving collision resistance, or a component for increasing the rigidity.
- the battery module does not have a structure for increasing the rigidity or a component for increasing the rigidity.
- the battery module may have a frame-shaped component that connects a plurality of battery cells, but this component is for connecting a plurality of battery cells and enhances the rigidity of the battery module itself. It's not a thing.
- the battery pack has a box structure that seals the internal battery module, and the inside of the battery pack is airtight.
- the battery module does not have a structure for sealing the battery cell, and a part of the battery cell may be exposed to the outside.
- the battery pack is equipped with a battery ECU (Electronic Control Unit) for controlling charging and discharging, but the battery module is not equipped with a battery ECU.
- a battery ECU Electronic Control Unit
- the battery 50 according to this embodiment does not have a structure or a component for increasing rigidity like a battery pack. Further, when the battery 50 is a battery module, the battery module does not have a structure for sealing the battery cell and does not have a battery ECU. Therefore, the battery 50 according to the present embodiment does not correspond to a so-called battery pack.
- the battery pack for vehicles is configured in consideration of collision resistance and maintainability such as replacement.
- the battery 50 according to the present embodiment is provided with a high-rigidity member such as a battery pack in order to consolidate the load paths at the time of collision into one system and efficiently transmit the load at the time of collision as described later. Absent.
- a plurality of batteries 50 are arranged on the vehicle body floor 110.
- the battery 50 is arranged so as to be spread over almost the entire surface in the area surrounded by the left and right side sills 20, the floor cross member 14a, and the floor cross member 14f, except for the area where the front side members 16a and 16b are arranged. You may.
- the upper surface of the battery 50 is in contact with the lower surface of the floor panel 12 and is fixed to the floor panel 12.
- the battery 50 may be fixed to the floor cross members 14a to 14f at the positions corresponding to the floor cross members 14a to 14f in the front-rear direction.
- removable fastening mechanisms such as bolt fastening, thumb turn clamper fastening, and fitting fastening can be used, and battery replacement / maintenance is required. If there is almost no property, rivet fastening, welding, adhesion, etc. can be used.
- the batteries 50 are spread over the entire surface of the floor panel 12 on the lower side of the vehicle body floor 110, more batteries 50 can be mounted.
- the battery 50 is also mounted between the front side members 16a and 16b and the side sill 20 outside the front side members 16a and 16b. Therefore, the load capacity of the battery 50 is increased, and the cruising range of the automobile can be lengthened.
- the battery 50 When the battery 50 is mounted on an automobile, the battery 50 is relatively heavy. Therefore, if the battery 50 is mounted at a high position in the vertical direction, the center of gravity of the automobile becomes high and the steering stability is hindered. In the present embodiment, the battery 50 is fixed below the vehicle body floor 110. Therefore, the position of the center of gravity of the automobile is lowered, and the steering stability is improved.
- the battery 50 is directly fixed to the vehicle body floor 110 on the lower side and suspended from the vehicle body floor 110, parts such as a battery box that supports the battery 50 from the lower side are unnecessary. Become. As a result, the number of parts is reduced and the manufacturing cost is reduced. Further, since the load applied when the automobile collides is concentrated on the floor cross members 14a to 14f, the load path of the load is concentrated and the design is simplified, so that the design process can be reduced.
- FIG. 6 is a schematic view showing an enlarged vicinity of the side sill 20 in FIG.
- FIG. 6 shows an example in which the floor cross member 14c is composed of a square pipe.
- the floor panel 12 may be bent upward in an L-shaped cross section at a position adjacent to the side sill 20, and is inserted between the end of the floor cross member 14c and the side sill 20. May be good.
- the side sill 20, the floor panel 12, and the floor cross member 14c may be joined and integrated by welding or the like with the floor panel 12 inserted between the side sill 20 and the floor cross member 14c. The same applies to the joint portion between the other floor cross members 14b, 14d, 14e and the side sill 20.
- the undercover 18 may be fixed to the front side members 16a and 16b by tightening the bolts 72 to the front side members 16a and 16b. Further, the undercover 18 may be fixed to the side sill 20 by tightening the bolt 74 to the side sill 20.
- the battery 50 may be fixed to the floor panel 12 or the floor cross member 14c by bolts 70.
- the battery 50 may be provided with a bolt insertion hole 52 into which the bolt 70 is inserted.
- the floor panel 12 or the floor cross member 14 may be provided with screw holes into which the bolts 70 are tightened.
- the bolt 70 is inserted into the bolt insertion hole 52 from the lower side, and the bolt 70 is tightened into the screw hole of the floor panel 12 or the floor cross member 14c, whereby the battery 50 is tightened with respect to the floor panel 12 or the floor cross member 14c. It may be fixed.
- FIG. 6 shows a cross section at the position of the floor cross member 14c
- the battery 50 is fixed at the positions of the other floor cross members 14b, 14d, 14e as in FIG.
- FIG. 7 is a schematic view showing an enlarged vicinity of the side sill 20 in FIG. At the cross-sectional position shown in FIG. 5, there is no floor cross member above the battery 50. Therefore, the battery 50 may be fixed to the floor panel 12 by bolts 70.
- the floor panel 12 may be provided with screw holes into which the bolts 70 are tightened.
- the battery 50 may be fixed to the floor panel 12 by inserting the bolt 70 into the bolt insertion hole 52 from below and tightening the bolt 70 into the screw hole of the floor panel 12.
- the floor panel 12 or the floor cloth members 14b to 14e are thin, instead of providing the screw holes in the floor panel 12 or the floor cloth members 14b to 14e, the floor panel 12 or the floor cloth member 14 is provided with screw holes.
- the nut to be held may be fixed by welding or the like.
- the bolt 70 for fixing the battery 50 is tightened to the nut fixed to the floor panel 12 or the floor cross member 14, and the battery 50 is fixed.
- the battery box described later can be omitted, the vehicle weight does not increase even if the thickness of the floor panel 12 and the floor cross members 14b to 14e is increased by the amount that the battery box is omitted. .. Therefore, the floor panel 12 and the floor cross members 14b to 14e can be made thick enough to form screw holes.
- the battery 50 When a running vehicle collides with another vehicle or a ground-fixed object, the battery 50 is suddenly decelerated, and the load (inertial force) generated by the deceleration is applied to the battery 50.
- the battery 50 When another vehicle collides with a stopped vehicle, the battery 50 is suddenly accelerated, and the load (inertial force) generated by the acceleration is applied to the battery 50.
- the side sills 20 extending in the front-rear direction and the front side members 16a and 16b extend in the left-right direction.
- the vehicle body floor 110 has high rigidity due to the floor cross members 14a to 14f.
- the floor cross members 14a to 14f increase the rigidity against a collision from the side surface
- the front side members 16a and 16b increase the rigidity against a collision from the front surface. Since the battery 50 is directly fixed to the high-rigidity vehicle body floor 110, the load (inertial force) during deceleration or acceleration is directly transmitted to the high-rigidity vehicle body floor 110. In particular, when the upper surface of the battery 50 is fixed in contact with the lower surface of the floor panel 12, the frictional force generated between the upper surface of the battery 50 and the lower surface of the floor panel 12 and / or the bolt used for fixing the frictional force.
- the load during deceleration or acceleration is applied to the vehicle body floor 110 having high rigidity. It is transmitted directly and reliably. As a result, the support function of the battery 50 is enhanced.
- FIG. 8 is an enlarged view showing the vicinity of the side sill 20, and is a schematic view showing an example in which the water cooling panel 40 is arranged between the battery 50 and the floor panel 12.
- FIG. 8 shows a cross section of the floor cross member 14c along the extending direction, as in FIG.
- the water-cooled panel 40 is composed of, for example, a rectangular parallelepiped hollow structure, and a cooling liquid circulates inside.
- the battery 50 may be fixed to the floor panel 12 or the floor cross member 14 by bolts 70 with the water cooling panel 40 interposed between the battery 50 and the floor panel 12.
- FIG. 9 is a perspective view showing a state in which the battery 50 and the water cooling panel 40 are viewed from below.
- the battery 50 is provided with a bolt insertion hole 52 into which the bolt 70 is inserted.
- the water cooling panel 40 may be provided with a bolt insertion hole 42 into which the bolt 70 is inserted.
- the battery 50 and the water-cooled panel 40 are so-called co-tightened by inserting bolts 70 into the bolt insertion holes 52 and 42 from below and tightening the bolts 70 into the screw holes of the floor panel 12 or the floor cross members 14b to 14e. May be fixed to the floor panel 12 or the floor cross members 14b to 14e.
- a bolt insertion hole 52 is provided in the housing of the battery cell containing the electrolyte, and the bolt 70 is tightened into the screw hole of the floor panel 12 or the floor cross members 14b to 14e to tighten the battery cell. Is fixed to the floor panel 12 or the floor cross members 14b-14e. Further, even when the battery 50 is a battery module, a bolt insertion hole 52 is provided in the housing of the battery cell, and the bolt 70 is tightened into the screw holes of the floor panel 12 or the floor cross members 14b to 14e to tighten the battery module. May be fixed to the floor panel 12 or the floor cross members 14b-14e.
- a bolt insertion hole 52 is provided in a frame-shaped component that bundles the battery cells, and the bolt 70 is tightened into the screw holes of the floor panel 12 or the floor cross members 14b to 14e.
- the battery module may be fixed to the floor panel 12 or the floor cross members 14b-14e.
- the individual battery cells may be fixed to the top plate of the frame-shaped component that connects the battery cells to each other.
- the electrodes of the battery 50 may be provided on the upper surface of the battery 50, or may be provided on the lower surface or the side surface. When the electrodes are provided on the upper surface of the battery 50, relief processing or the like is appropriately performed on the floor panel 12 or the floor cross members 14b to 14e to avoid interference with the electrodes.
- the battery 50 supplies electric power to the automobile by discharging it. Further, the battery 50 stores the electric power generated by the motor generator of the automobile or the electric power supplied from the outside. The battery 50 generates heat in the process of discharging or charging. The heat generated by the heat generated by the battery 50 moves upward in the battery 50. Therefore, by arranging the water cooling panel 40 on the upper part of the battery 50, the battery 50 can be effectively cooled. This makes it possible to further extend the life of the battery 50.
- FIGS. 10 to 12 the state in which the load path when the load (inertial force) is transmitted at the time of collision is aggregated by the substructure 100 of the present embodiment will be described.
- FIG. 10 in the configuration shown in FIG. 8, when the side surface (side sill 20) of the automobile collides with the pole 60 which looks like a utility pole, the direction in which the load is applied is indicated by a white arrow.
- FIG. 10 shows a side collision (side collision) of an automobile, in which the vehicle body floor 110 moves from right to left in the figure, and the side sill 20 of the vehicle body floor 110 collides with the pole 60.
- FIG. 11 is a plan view showing a state in which the vehicle body floor 110 is viewed from above of FIG. In FIG. 11, the floor panel 12 is not shown. On the plan view shown in FIG. 11, the load due to the collision is transmitted to the floor cross members 14b, 14c, 14d and transmitted to the side sill 20 as shown by the white arrows.
- the energy absorbing member 22 is made of an extruded aluminum material or the like, and is arranged in the side sill 20 so that the extrusion direction coincides with the longitudinal direction of the floor cross members 14a to 14f.
- the energy absorbing member 22 has a hollow structure and has a rectangular cross section orthogonal to the longitudinal direction. Therefore, when the side sill 20 collides with the pole 60, the energy absorbing member 22 is crushed and the energy of the collision is absorbed.
- the load generated by the sudden deceleration of the battery 50 at the time of a collision is transmitted from the floor cross member 14 to the side sill 20. Therefore, on the cross-sectional view shown in FIG. 10, there is only one path (load path) through which the load is transmitted.
- FIG. 12 shows an enlarged view of the vicinity of the side sill 20 in the structure of the comparative example in which the battery 50 is placed and fixed in the battery box 80 and the battery box 80 is fixed to the floor panel 12 for comparison with FIG. It is a schematic diagram.
- the battery 50 is placed and fixed on the lower surface of the battery box 80.
- the battery box 80 has a complicated structure from the viewpoint of supporting the weight of the battery 50 and collision safety.
- the battery box 80 has a highly rigid structure in order to withstand the load caused by a collision.
- the battery box 80 has a cross member 82 for reinforcing rigidity from the bottom surface to the side surface inside.
- the cross member 82 is arranged so as to extend in the same direction as the floor cross member, and is composed of a separate member having a hollow structure, ribs, and the like.
- the reason for providing such a cross member 82 is that if the cross member 82 is not provided, the battery box 80 may be deformed when a load is applied to the battery 50 due to a collision, or the battery box 80 may be mounted on the vehicle body together with the battery 50. This is because there is a possibility of leaving the floor.
- the battery box 80 has a structure having high rigidity equivalent to that of the vehicle body floor.
- the load applied to the battery 50 due to the deceleration of the battery 50 is transmitted to the cross members 82 provided from the bottom surface to the side surface of the battery box 80, and is transmitted to the floor cross members 14b to 14e. Therefore, the load applied to the battery 50 due to the deceleration of the battery 50 is transmitted in the direction indicated by the black arrow in FIG.
- both load paths have rigidity that can withstand the load at the time of collision. It is necessary to secure it.
- both the floor cross member and the battery box have overlapping functions, and the functions are wasted.
- the amount of the structural material used is increased in order to secure the required rigidity in both the battery box 80 and the floor cross member. It will increase and lead to an increase in the weight of automobiles.
- the load paths are aggregated into only one system indicated by the white arrow in FIG.
- This road path is the main path through which the load that stops the vehicle when it collides with the pole 60 is transmitted, and the rigidity of the vehicle body floor 110 is increased by members such as floor cross members 14a to 14f and front side members 16a and 16b.
- the battery box 80 Since the load due to the deceleration of the battery 50 is directly transmitted to the strong vehicle body floor 110, the battery box 80 as in the structure shown in FIG. 12 is unnecessary.
- the side collision of the automobile has been described as an example, but even when the automobile collides from the front, the load is transmitted in the longitudinal direction of the front side members 16a and 16b, so that the road paths are integrated into one. ..
- the vehicle body floor 110 only needs to have the required rigidity, and the battery box itself becomes unnecessary.
- the structure for transmitting the load in the battery box 80 can be abolished, and the structure for transmitting the load of the battery 50 in the event of a collision can be integrated into the strong vehicle body floor 110.
- members such as floor cross members elastically buckle without plastic deformation due to the load at the time of collision.
- the cross-sectional area of the cross section in the direction orthogonal to the longitudinal direction of these cross members is small and the plate thickness is thick.
- the cross-sectional area of the cross section is made smaller and the plate thickness is increased without increasing the overall weight. Can be thickened. Therefore, according to the present embodiment, as compared with the structure shown in FIG. 12, it is possible to increase the impact absorption capacity by delaying the elastic buckling at the time of collision, and reduce the amount of structural material used. It is possible to achieve weight reduction and reduce manufacturing costs.
- the battery 50 since the battery 50 is fixed over the entire surface of the vehicle body floor 110, there may be an effect of reducing the transmitted sound rate-determined by the mass.
- the heavier the weight of the substructure 100 the less the transmitted sound from the outside of the automobile. Therefore, it is not necessary to provide a separate member such as an asphalt sheet in order to reduce the transmitted sound, and by reducing these separate members, it is possible to reduce the weight.
- FIG. 13 is a side view showing the hollow member 90 used when comparing the load bearing performance.
- FIG. 14 is a schematic view showing a cross section along the alternate long and short dash line IV-IV'in FIG. 13.
- the hollow member 90 corresponds to the floor cloth member 14c shown in FIGS. 10 and 12.
- a hollow member 90 having a length in the longitudinal direction of 250 mm, a rectangular cross section shown in FIG. 14 having a long side of 80 mm and a short side of 40 mm was used. Then, as shown in FIG. 13, the hollow member 90 is arranged so that the longitudinal direction is the direction of gravity, one end face in the longitudinal direction is brought into contact with the floor 92, and a flat plate-shaped impactor is provided with respect to the other end face.
- the load-bearing performance was compared by calculating the weight efficiency of the load-bearing capacity of the hollow member 90 with respect to the displacement of the impactor 94.
- one hollow member 90 made of a steel plate having a yield strength of 1470 MPa class and a plate thickness of 2.0 mm was used.
- two hollow members 90 made of a steel plate having a yield strength of 1470 MPa class and a plate thickness of 1.0 mm were used in parallel.
- FIG. 15 is a characteristic diagram showing a comparison result of the load bearing performance of the example and the comparative example.
- the horizontal axis represents the displacement of the impactor 94.
- F * on the vertical axis is a value indicating the load capacity in terms of weight efficiency, and is an example or a comparative example with respect to (maximum load applied to the hollow member 90 / member weight of the hollow member 90) of the comparative example. The ratio of (load applied to the hollow member 90 / member weight of the hollow member 90) is shown. As shown in FIG.
- the load capacity is withstood as compared with the comparative example in which the load paths are divided into two and the plate thickness is reduced. It can be seen that both performance and weight reduction can be achieved at a high level.
- the battery 50 is directly fixed to the lower side with respect to the vehicle body floor 110 without using the battery box 80, so that the case where the battery box 80 is used is compared with the case where the battery box 80 is used.
- the number of load paths can be reduced. As a result, it is possible to achieve both load bearing performance and weight reduction.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
Description
前記バッテリセルまたは前記バッテリモジュールは、前記サイドシルと隣接する領域を含む前記フロアパネルの全域に配置されている、上記(5)又は(6)に記載の自動車の下部構造。
14a~14f フロアクロスメンバー
15 フロントバンパー
16a,16b フロントサイドメンバー
17a,17b リアサイドメンバー
17c クロスメンバー
18 アンダーカバー
19 リアバンパー
20 サイドシル
22 エネルギー吸収部材
40 水冷パネル
42,52 ボルト挿入孔
50 バッテリ
60 ポール
70,72,74 ボルト
90 中空部材
92 床
94 インパクター
Claims (7)
- 自動車の床部を構成する車体フロアと、
前記車体フロアの下側に前記車体フロアから直接吊り下げられて固定されたバッテリセルまたはバッテリモジュールと、
を備える、自動車の下部構造。 - 前記バッテリセルまたは前記バッテリモジュールは、上面が前記車体フロアの下面に当接した状態で前記車体フロアに対して固定されている、請求項1に記載の自動車の下部構造。
- 冷却液が循環する冷却パネルを更に備え、
前記バッテリセルまたは前記バッテリモジュールは、前記車体フロアとの間に前記冷却パネルを介在させて前記車体フロアに対して固定されている、請求項1に記載の自動車の下部構造。 - 前記バッテリセルまたは前記バッテリモジュールの上面が前記冷却パネルの下面に当接している、請求項3に記載の自動車の下部構造。
- 前記車体フロアは、自動車の床面を構成するフロアパネルを有し、
前記バッテリセルまたは前記バッテリモジュールは、前記フロアパネルに対して固定されている、請求項1~4のいずれか一項に記載の自動車の下部構造。 - 前記車体フロアは、前記フロアパネル上に配置され、自動車の左右方向に延在するクロスメンバを有し、
前記バッテリセルまたは前記バッテリモジュールは、前記フロアパネル又は前記クロスメンバに対して固定されている、請求項5に記載の自動車の下部構造。 - 前記車体フロアは、自動車の左右方向の最外部において自動車の前後方向に延在するサイドシルを有し、
前記フロアパネルは、左右の前記サイドシルの間に設けられ、
前記バッテリセルまたは前記バッテリモジュールは、前記サイドシルと隣接する領域を含む前記フロアパネルの全域に配置されている、請求項5又は6に記載の自動車の下部構造。
Priority Applications (5)
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CN202080056510.4A CN114206712A (zh) | 2019-10-03 | 2020-10-02 | 汽车的下部构造 |
KR1020227007404A KR20220039805A (ko) | 2019-10-03 | 2020-10-02 | 자동차의 하부 구조 |
JP2021551629A JP7339565B2 (ja) | 2019-10-03 | 2020-10-02 | 自動車の下部構造 |
EP20871970.8A EP4039517A4 (en) | 2019-10-03 | 2020-10-02 | UNDERBODY FOR MOTOR VEHICLES |
US17/765,284 US20220363122A1 (en) | 2019-10-03 | 2020-10-02 | Under body structure of automobile |
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JP2019183315 | 2019-10-03 | ||
JP2019-183315 | 2019-10-03 |
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WO2021066180A1 true WO2021066180A1 (ja) | 2021-04-08 |
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PCT/JP2020/037658 WO2021066180A1 (ja) | 2019-10-03 | 2020-10-02 | 自動車の下部構造 |
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US (1) | US20220363122A1 (ja) |
EP (1) | EP4039517A4 (ja) |
JP (1) | JP7339565B2 (ja) |
KR (1) | KR20220039805A (ja) |
CN (1) | CN114206712A (ja) |
WO (1) | WO2021066180A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022261364A1 (en) * | 2021-06-09 | 2022-12-15 | Fisker Inc. | Methods and systems for disposing cells |
WO2023083606A1 (de) * | 2021-11-09 | 2023-05-19 | Mercedes-Benz Group AG | Karosserierohbau mit einer antriebsbatterie |
WO2023174829A1 (de) * | 2022-03-18 | 2023-09-21 | Mercedes-Benz Group AG | Anordnung eines elektrischen energiespeichers an einem rohbau für einen personenkraftwagen |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5411235B2 (ja) | 1973-08-31 | 1979-05-12 | ||
JPS6122807B2 (ja) | 1979-06-13 | 1986-06-03 | Mitsubishi Electric Corp | |
JPH11176487A (ja) * | 1997-12-10 | 1999-07-02 | Nissan Motor Co Ltd | 電気自動車のバッテリ温度調整装置および調整方法 |
JP2009143446A (ja) * | 2007-12-14 | 2009-07-02 | Mitsubishi Motors Corp | 電気自動車のバッテリユニット取付構造 |
JP2012066773A (ja) * | 2010-09-27 | 2012-04-05 | Toray Ind Inc | 電気自動車用フロア構造体 |
JP2013060160A (ja) | 2011-09-14 | 2013-04-04 | Toyota Motor Corp | 車両用電池搭載構造 |
WO2013084935A1 (ja) * | 2011-12-09 | 2013-06-13 | 本田技研工業株式会社 | バッテリパックの車載構造 |
US20160149277A1 (en) * | 2014-06-05 | 2016-05-26 | Lg Chem, Ltd. | Frame for secondary battery and battery module including the same |
JP2017226353A (ja) | 2016-06-23 | 2017-12-28 | 本田技研工業株式会社 | 車体の下部構造 |
CN109204529A (zh) * | 2017-06-30 | 2019-01-15 | 比亚迪股份有限公司 | 车身结构和车辆 |
JP2019014349A (ja) | 2017-07-05 | 2019-01-31 | トヨタ自動車株式会社 | 電池搭載構造 |
JP2019156029A (ja) | 2018-03-09 | 2019-09-19 | トヨタ自動車株式会社 | 車両下部構造 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000344026A (ja) * | 1999-06-02 | 2000-12-12 | Nissan Motor Co Ltd | 電気自動車の線・管状部品配索構造 |
JP5531626B2 (ja) * | 2009-05-26 | 2014-06-25 | 日産自動車株式会社 | 車両のバッテリアセンブリ冷却構造、および、ウォータージャケット付きバッテリアセンブリ |
KR101220768B1 (ko) * | 2010-12-28 | 2013-01-21 | 주식회사 포스코 | 전기 자동차용 언더 바디 |
DE102011051698A1 (de) * | 2011-07-08 | 2013-01-10 | Thyssenkrupp Steel Europe Ag | Bodenstruktur für ein Fahrzeug |
DE102011113238A1 (de) * | 2011-09-13 | 2012-04-26 | Daimler Ag | Karosseriestruktur für einen Kraftwagen, sowie Kraftwagen |
JP2014201277A (ja) * | 2013-04-09 | 2014-10-27 | ユニプレス株式会社 | 電気自動車などに使用するバッテリー搭載構造 |
JP6520808B2 (ja) * | 2016-04-21 | 2019-05-29 | トヨタ自動車株式会社 | 車両のバッテリ搭載構造 |
JP6610412B2 (ja) * | 2016-04-26 | 2019-11-27 | トヨタ自動車株式会社 | 車両のバッテリ搭載構造 |
JP6614012B2 (ja) * | 2016-04-26 | 2019-12-04 | トヨタ自動車株式会社 | 車両のバッテリ搭載構造 |
US10479413B1 (en) * | 2016-09-20 | 2019-11-19 | Apple Inc. | Vehicle floor and subassemblies thereof |
CN109435661B (zh) * | 2017-09-05 | 2023-11-17 | 马勒国际有限公司 | 用于电动车辆或混合动力车辆的储能器组件 |
CN207565708U (zh) * | 2017-12-11 | 2018-07-03 | 北京新能源汽车股份有限公司 | 地板和电动汽车 |
-
2020
- 2020-10-02 EP EP20871970.8A patent/EP4039517A4/en active Pending
- 2020-10-02 CN CN202080056510.4A patent/CN114206712A/zh active Pending
- 2020-10-02 KR KR1020227007404A patent/KR20220039805A/ko not_active Application Discontinuation
- 2020-10-02 JP JP2021551629A patent/JP7339565B2/ja active Active
- 2020-10-02 WO PCT/JP2020/037658 patent/WO2021066180A1/ja unknown
- 2020-10-02 US US17/765,284 patent/US20220363122A1/en active Pending
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5411235B2 (ja) | 1973-08-31 | 1979-05-12 | ||
JPS6122807B2 (ja) | 1979-06-13 | 1986-06-03 | Mitsubishi Electric Corp | |
JPH11176487A (ja) * | 1997-12-10 | 1999-07-02 | Nissan Motor Co Ltd | 電気自動車のバッテリ温度調整装置および調整方法 |
JP2009143446A (ja) * | 2007-12-14 | 2009-07-02 | Mitsubishi Motors Corp | 電気自動車のバッテリユニット取付構造 |
JP2012066773A (ja) * | 2010-09-27 | 2012-04-05 | Toray Ind Inc | 電気自動車用フロア構造体 |
JP2013060160A (ja) | 2011-09-14 | 2013-04-04 | Toyota Motor Corp | 車両用電池搭載構造 |
WO2013084935A1 (ja) * | 2011-12-09 | 2013-06-13 | 本田技研工業株式会社 | バッテリパックの車載構造 |
US20160149277A1 (en) * | 2014-06-05 | 2016-05-26 | Lg Chem, Ltd. | Frame for secondary battery and battery module including the same |
JP2017226353A (ja) | 2016-06-23 | 2017-12-28 | 本田技研工業株式会社 | 車体の下部構造 |
CN109204529A (zh) * | 2017-06-30 | 2019-01-15 | 比亚迪股份有限公司 | 车身结构和车辆 |
JP2019014349A (ja) | 2017-07-05 | 2019-01-31 | トヨタ自動車株式会社 | 電池搭載構造 |
JP2019156029A (ja) | 2018-03-09 | 2019-09-19 | トヨタ自動車株式会社 | 車両下部構造 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022261364A1 (en) * | 2021-06-09 | 2022-12-15 | Fisker Inc. | Methods and systems for disposing cells |
WO2023083606A1 (de) * | 2021-11-09 | 2023-05-19 | Mercedes-Benz Group AG | Karosserierohbau mit einer antriebsbatterie |
WO2023174829A1 (de) * | 2022-03-18 | 2023-09-21 | Mercedes-Benz Group AG | Anordnung eines elektrischen energiespeichers an einem rohbau für einen personenkraftwagen |
Also Published As
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CN114206712A (zh) | 2022-03-18 |
US20220363122A1 (en) | 2022-11-17 |
JPWO2021066180A1 (ja) | 2021-04-08 |
JP7339565B2 (ja) | 2023-09-06 |
EP4039517A1 (en) | 2022-08-10 |
KR20220039805A (ko) | 2022-03-29 |
EP4039517A4 (en) | 2022-11-30 |
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