WO2023002047A1 - Antriebsbatterie für ein kraftfahrzeug und kraftfahrzeug mit derartiger antriebsbatterie - Google Patents
Antriebsbatterie für ein kraftfahrzeug und kraftfahrzeug mit derartiger antriebsbatterie Download PDFInfo
- Publication number
- WO2023002047A1 WO2023002047A1 PCT/EP2022/070695 EP2022070695W WO2023002047A1 WO 2023002047 A1 WO2023002047 A1 WO 2023002047A1 EP 2022070695 W EP2022070695 W EP 2022070695W WO 2023002047 A1 WO2023002047 A1 WO 2023002047A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- drive battery
- layer
- drive
- battery cell
- Prior art date
Links
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- 238000011161 development Methods 0.000 description 8
- 230000018109 developmental process Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
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Classifications
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- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D63/00—Motor vehicles or trailers not otherwise provided for
- B62D63/06—Trailers
- B62D63/062—Trailers with one axle or two wheels
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
-
- 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
- H01M50/249—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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/11—Electric energy storages
- B60Y2400/112—Batteries
-
- 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
- B62D25/2018—Floors or bottom sub-units in connection with other superstructure subunits the subunits being front structures
-
- 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
- B62D25/2027—Floors or bottom sub-units in connection with other superstructure subunits the subunits being rear structures
-
- 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
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
-
- 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
-
- 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 a drive battery for a motor vehicle with a drive battery housing and a method for producing such a drive battery.
- a motor vehicle with an electric drive usually has a drive battery, which has a drive battery housing in which a number of battery modules with battery cells, electrics/electronics and a cooling device are installed.
- the traction battery housing is in turn mounted below a floor assembly on a vehicle body.
- the well-known drive battery housing is made of aluminum, for example, and has side supports, a cover and a base.
- the side supports are designed, for example, as extruded profiles or cast parts. If necessary, further longitudinal members and cross members are also provided in the battery housing in order to give the drive battery a certain degree of rigidity and resistance to collisions.
- a known drive battery housing has longitudinal members and several cross members that run between the longitudinal members. Furthermore, the drive battery housing has an upper wall and a lower wall, which are each connected to at least one outer support structure, ie the outer longitudinal members and the outer cross members.
- the longitudinal beams and also the cross beams are made from extruded profiles.
- the traction battery case is mounted below a body floor. It is the object of the present invention to create a drive battery or a motor vehicle with such a drive battery, the drive battery having a higher power density per installation space and at the same time greater rigidity and strength.
- the drive battery for a motor vehicle has a drive battery housing which has a top wall and a bottom wall.
- a battery cell layer with a multiplicity of battery cells arranged vertically and next to one another and a support layer, which can also be referred to as a degassing layer, spacing layer or deformation layer, are arranged in the drive battery housing.
- the battery cell layer is bonded to the cover wall by means of an upper layer of adhesive and to the support layer by means of a lower layer of adhesive, in particular over a large area, i.e. over its entire surface.
- the support layer is also bonded to the bottom wall by means of another layer of adhesive.
- the battery cells can be designed to be relatively high, as a result of which the storage capacity of the drive battery is increased.
- the drive battery has high torsional and flexural rigidity overall, so that no further support structure is required within the drive battery. All layers of the drive battery contribute to the rigidity and strength of the drive battery.
- the drive battery is designed for installation in the motor vehicle in such a way that the cover wall is at the top and the bottom wall is at the bottom. In the installed state, the floor wall thus preferably forms an underbody of the motor vehicle.
- the support layer has the function of a spacer layer, so that there is a certain distance between the battery cell layer and the bottom wall, so that sufficient deformation space is available when driving over a bollard or the like, ie in the event of a collision from below.
- the support layer is designed to adequately dissipate collision energy through deformation. By gluing the support layer, it contributes to the rigidity and strength of the drive battery despite its deformability.
- the upper adhesive layer and/or the lower adhesive layer and/or the further adhesive layer can be formed from a foamed material.
- a foamed material is also referred to as structural foam.
- the foamed material can be polyurethane.
- the battery cell layer is formed from a large number of battery cells, each battery cell consisting of a battery cell housing and a cell winding which is accommodated in the battery cell housing.
- An upper face of the battery cell housing is in each case glued to the cover wall and a lower face of the battery cell housing is in each case glued to the support layer.
- the multiplicity of battery cell housings thus form a multi-chamber structure which is similar to a honeycomb structure and which significantly increases flexural rigidity and torsional rigidity by being bonded to the other layers of the drive battery.
- the battery cell housings are thin-walled and made of metal, such as aluminum or steel.
- Adjacent battery cell housings can be glued to one another on the lateral surface.
- adjacent battery cell housings can be glued to one another on the lateral surface using a foamed material.
- the foamed material can be polyurethane foam.
- the battery cell can be a so-called round cell, i.e. circular-cylindrical, or a so-called prismatic cell, i.e. essentially cuboid.
- the battery cell layer can also consist of an integrally designed multi-chamber structure - which runs transversely, in particular perpendicularly, to the plane of the top wall or bottom wall - with a large number of vertical chambers, each containing a cell coil or several cell wraps are recorded.
- An upper face of the multi-chamber structure is glued to the cover wall and a lower face of the multi-chamber structure is glued to the support layer.
- the multi-chamber structure can be produced, for example, by extrusion.
- the individual chambers can have a square or other polygonal cross-section, for example similar to honeycombs.
- the integrally formed multi-chamber structure can give the drive battery even greater rigidity with less weight. Furthermore, a larger number of cell coils can be accommodated in the same area.
- the drive battery has a battery cell contacting system that is embedded in the upper adhesive layer and/or in the lower adhesive layer.
- the battery cell contacting system is protected in the adhesive layer, for example protected against corrosion. At the same time, the battery cell contacting system can thereby contribute to the rigidity and strength of the drive battery described above.
- the battery cell contacting system is preferably embedded with both contacting poles in the upper layer of adhesive. Through this is that Battery cell contact system housed particularly well protected. In particular, it is better protected in the event of collisions with the bottom wall.
- a degassing opening is advantageously formed in each battery cell on the side facing the support layer.
- the degassing openings of the battery cells are thus aligned downwards and not in the direction of the cover wall and thus of a passenger compartment when the drive battery is installed. At the bottom there is more space for the gases to escape and it is easier to prevent gases from flowing towards the passenger compartment.
- a recess i.e. a degassing space or free space
- Adjacent recesses can be suitably connected to one another by degassing channels, so that gas escaping from a battery cell can be easily passed on and sufficient space is available.
- the support layer can be formed from a foamed material, in particular a foamed plastic, for example foamed polyurethane.
- a foamed material is light, but can still make a sufficient contribution to the rigidity and strength of the drive battery if it is bonded to the adjacent layers over the entire surface. Furthermore, the foamed material can serve very well to reduce collision energy through deformation.
- the cover wall can be designed as a heat exchanger for temperature control of the battery cell layer.
- the top wall can also be used as a temperature control surface for the passenger compartment when the drive battery is installed.
- the support layer is designed as a heat exchanger for temperature control of the battery cell layer.
- heat exchange devices can be provided alternatively or additionally between the battery cells.
- the heat exchange devices can be provided on lateral surfaces, ie not on the end faces, of the battery cells. This is also called intercell tempering.
- a higher temperature control performance can be achieved by the temperature control over the lateral surface, so that the drive battery reaches the desired target working temperature more quickly and can be cooled correspondingly quickly with increased power consumption, so that the target working temperature is not exceeded.
- top wall and the bottom wall are preferably connected to one another via a flange connection.
- a fluid-tight drive battery housing can be formed here by means of a corresponding seal, for example on the flange connection.
- the top wall and/or the bottom wall can be designed in the form of a trough or can be part of a trough.
- a lightning protection layer for example a mica plate, can be arranged on an inner side of the bottom wall.
- the bottom wall can be glued to the cord protection layer or otherwise formed integrally with the cord protection layer.
- the stranded wire protection layer is in turn preferably glued to the support layer.
- the wire protection layer serves as wire protection for the bottom wall, especially if hot gases escape from the battery cells.
- This is particularly advantageous when the bottom wall is made of aluminum, an aluminum alloy or fiber-reinforced plastic.
- this can be advantageous if degassing openings of the battery cells are arranged on an underside, for example a lower end face, of the battery cells.
- the top wall and/or the bottom wall can be made of aluminum or an aluminum alloy or of steel.
- the cover wall and/or the base wall can also consist of a fiber-reinforced plastic, for example a carbon-fiber-reinforced plastic.
- the top wall and/or the bottom wall can each be provided on the inside with an electrical insulation layer, for example in the form of a coating. This is advantageous when electrical insulation from the top wall and/or bottom wall is required and the top wall and/or bottom wall are electrically conductive.
- top, bottom, and/or additional adhesive layers may be thermally conductive adhesive when enhanced heat exchange is required to remove or supply heat to the battery cells.
- the drive battery is preferably designed for installation on an underbody of a body of the motor vehicle, with the underbody having a left-hand side member and a right-hand side member, with the drive battery or the drive battery housing being mounted on the underbody from below, and with the cover wall having at least one section Forms the bottom of the floor assembly.
- the floor wall preferably forms an underbody of the motor vehicle.
- the drive battery according to the invention can be designed and connected to the underbody in such a way that the drive battery increases body rigidity for driving operation of the motor vehicle and that the drive battery increases body strength for a collision load case of the motor vehicle.
- a further aspect of the present invention relates to a motor vehicle, in particular a passenger vehicle or a truck, with a drive battery described as understood.
- the motor vehicle has an electric drive.
- a body of the motor vehicle has an underbody with a left side member and a right side member. Such body side members are also used as side skirts or outer, lower side rails.
- the drive battery has a drive battery housing, with the drive battery or the drive battery housing being mounted on the underbody from below.
- the installed drive battery or the installed drive battery housing forms at least in sections a floor of the floor assembly.
- the drive battery replaces the floor of the floor assembly.
- an installation space in the vehicle height direction (Z direction) can be reduced as a result, or taller battery cells can be installed.
- the drive battery extends essentially over the entire width of the underbody, i.e. essentially over an entire installation space between the left side member and the right side member.
- the drive battery housing can extend in an area or over as large an area as possible between a front axle and a rear axle of the motor vehicle.
- the drive power housing extends from a front bulkhead (a passenger compartment) or from below the front bulkhead to front ends of a left wheelhouse and a right wheelhouse.
- the drive battery housing can extend below a second row of seats in the motor vehicle.
- the traction battery case may extend and be located at least from a region between a front body pillar (an A pillar) and a rear body pillar (specifically, a C pillar).
- the drive battery and the floor assembly together form a fluid-tight floor of a passenger cell of the motor vehicle.
- the floor assembly would not have a fluid-tight floor, or the floor assembly alone is not fluid-tight down.
- the drive battery housing thus replaces the function of a continuous, fluid-tight floor of the floor assembly.
- the term “fluid-tight” in this context does not exclude the floor assembly or the drive storage housing having openings that can be closed in cooperation with the floor assembly for a cable bushing, a water drain or the like.
- Fluid-tight means in particular "liquid-tight”.
- a seal or a sealing adhesive can be suitably arranged between the drive battery housing and the floor assembly, so that the mounted drive battery housing completely seals the floor assembly at the bottom.
- the seal can be made of butyl, for example.
- the seal can be designed as a flat seal, lip seal or profile seal.
- the drive battery housing has a circumferential sealing flange, which can also be a mounting flange at the same time, with a continuous circumferential sealing surface for sealing the drive accumulator housing with respect to the floor assembly.
- the peripheral sealing flange is advantageously located in one plane, i.e. in a plane parallel to an xy plane of a vehicle coordinate system. As a result, tightness can be produced better.
- the underbody can have a front cross member structure and a rear cross member structure, with the drive battery being mounted on the left side member and on the right side member as well as on the front cross member structure and on the rear cross member structure.
- the aforesaid sealing flange In this case, io rests against corresponding flange sealing surfaces of the side members and the cross member structures.
- the underbody advantageously has at least one further cross member between the front cross member structure and the rear cross member structure, which is connected to the left side member and the right side member or runs between the left side member and the right side member.
- the additional cross member can be a seat cross member or a heel plate cross member.
- the floor assembly has several additional cross members, between which a free space is formed, so that the floor assembly is open at the bottom.
- the seat crossmember(s) are advantageously arranged in the area behind the bulkhead up to a B-pillar and serve to fasten a front row of seats, i.e. front seats, as well as collision resistance of the floor assembly in the transverse direction.
- the heel plate cross member is usually arranged in the area of a front end of a second row of seats and is used to fasten the second row of seats and also to provide collision resistance for the floor assembly in the transverse direction.
- the drive battery is preferably mounted on the further cross member, in particular by means of a screw connection. Additionally or alternatively, the drive battery can be connected to the cross member by an adhesive connection, i.e. glued.
- the overall rigidity of the underbody with the drive battery can be further increased and the vibration behavior of the motor vehicle in driving mode can also be positively influenced. Furthermore, the drive battery thereby supports the cross member or cross member structures against buckling in the event of a lateral collision.
- the floor assembly does not have a floor panel between the front cross member structure and the rear cross member structure or between the front cross member structure and a further cross member - in other words, the floor assembly is advantageously designed without a floor panel or is floor panel-free. Thus, a larger area of the floor assembly is open.
- open means that a free, open area is formed, which forms a through opening, so that the floor assembly is open at the bottom.
- the floor assembly can have at least one further longitudinal member between the left longitudinal member and the right longitudinal member, which is connected to the front cross member structure and/or the rear cross member structure.
- the additional longitudinal member can be arranged in the middle, for example, and can form a center tunnel there.
- the floor assembly advantageously has no floor panel at all.
- a floor panel is usually a single-shell component, in particular a flat component, optionally a single-layer component that does not have or form a hollow profile or the like and therefore does not form a body support.
- Preferably 40 to 85% of the area between the right side member and the left side member and the front cross member structure and the rear cross member structure is open, i.e. without a floor panel and without a cross member.
- a cover wall, optionally an upper and/or lower battery cell contacting system, a battery cell layer and optionally a support layer are arranged one on top of the other (arranging step).
- a bottom wall, a support layer, optionally the upper and/or lower battery cell contacting system, and the battery cell layer are arranged one on top of the other (arranging step).
- spaces between the individual layers and the battery cells are filled with a liquid foam precursor, in particular a two-component mixture or a multi-component mixture. This reacts in a further process step (foaming step).
- Two-component mixture or multi-component mixture i.e.
- the foam precursor after the filling process and forms a foamed material, in particular polyurethane foam, so that the bottom wall, if necessary the upper and/or lower battery cell contacting system, the battery cell layer and if necessary the support layer are glued together or the cover wall, which Support layer, optionally the upper and / or lower battery cell contact system, and the battery cell layer are glued together.
- a foamed material in particular polyurethane foam
- the individual layers of the drive battery involved in the arranging step can be bonded particularly easily and in one work step.
- the bottom wall or the top wall is preferably at the bottom and optionally the battery cell contacting system, the battery cell layer and optionally the support layer are stacked/arranged accordingly.
- the liquid foam precursor can flow from top to bottom due to gravity and is suitably distributed as a result.
- the method described can be applied analogously to the production of all the traction batteries described here.
- the method can be applied to a drive battery with a battery cell contacting system arranged at the top or a battery cell contacting system arranged at the bottom or a battery cell contacting system arranged on both sides of the battery cell.
- the method can also be implemented on drive batteries with the different heat exchanger systems described herein on the lateral surface of the battery cells and/or on the end faces.
- the layers involved can be pressed together during the foaming step, in particular using a corresponding tool. This means that the layers are not pushed apart by the foam and the adhesive effect is improved Spacers may be provided between the plies, either integral with a respective ply or formed separately from the plies.
- the upper adhesive layer and optionally the lower adhesive layer and optionally the further adhesive layer thus have a defined dimension in the vertical direction (z-direction in the vehicle coordinate system) of the drive battery.
- the bottom wall or alternatively the top wall can be attached using, for example, a further layer of adhesive, which is then preferably not a foamed material (mounting the bottom wall or the top wall).
- a further layer of adhesive which is then preferably not a foamed material (mounting the bottom wall or the top wall).
- the spacer layer can be attached by a lower adhesive layer, which is then preferably not a foamed material.
- the bottom wall or, alternatively, the top wall can already be arranged in the arranging step.
- all layers of the drive battery including the bottom wall and the top wall are arranged one on top of the other in the arranging step.
- the foaming step is carried out.
- all layers of the drive battery are advantageously braced or pressed together, so that the individual layers are not pushed away from one another during foaming. After all the layers of the drive battery have been glued together by foaming, no further step for attaching further layers is then required.
- FIG. 1 schematically shows a sectional view of a drive battery according to an exemplary embodiment of the present invention.
- FIG. 2 schematically shows a perspective view of a motor vehicle with a body and a drive battery before the drive battery is mounted on the body according to the exemplary embodiment of the present invention.
- FIG. 3 schematically shows a sectional view of the motor vehicle with the body and the mounted drive battery according to the exemplary embodiment of the present invention.
- Fig. 4 schematically shows a perspective view from below of the motor vehicle with the body without the drive battery.
- FIG. 5 schematically shows a perspective view from above of the motor vehicle with the body and the drive battery mounted according to the embodiment of the present invention.
- a drive battery 1 according to the embodiment of the present invention is shown very schematically in a sectional view.
- the drive battery 1 is designed for mounting on a body of a passenger vehicle.
- the drive battery 1 is a so-called high-voltage storage device for driving an electric drive motor of the passenger vehicle.
- the drive battery 1 is made up of several layers like a sandwich. Starting from the top, the drive battery 1 has a cover wall 35 as part of a drive battery housing 3.
- the cover wall 35 is connected over an area of an upper adhesive layer 9 to a top side of a battery cell layer 5.
- an underside of the battery cell layer 5 is connected over a surface area to a support layer 7 via a lower adhesive layer 11 .
- the support layer 7 is again on its underside connected to a bottom wall 33 of the drive battery housing 3 via a further adhesive layer 13 .
- the battery cell layer 5 consists of a large number of battery cells.
- Each battery cell 51 in turn consists of a battery cell housing 53 made of aluminum or steel, in which a cell coil 55 is accommodated.
- the battery cells 51 are so-called round cells with a circular-cylindrical shape.
- the battery cells 51 are arranged on edge, i.e. vertically, in the battery cell layer 5, so that their outer surfaces abut one another.
- the upper end faces of the battery cells 51 are each connected to the adhesive layer 9 and thus to the cover wall 35 .
- the lower end faces of the battery cells 51 are each connected to the adhesive layer 11 and thus to the support layer 7 .
- a battery cell contacting system which is not shown in any more detail, is embedded in the upper adhesive layer 9 and suitably connects the poles of the battery cells 51 to one another.
- the adhesive surrounds the conductor tracks of the battery cell contacting system. Both poles of the battery cells 51 are located on the upper end of the battery cells 51.
- Degassing openings are formed on the lower end face of the battery cells 51 .
- recesses or degassing spaces are formed in the support layer 7 .
- the adhesive layer 11 has recesses. The recesses are suitably connected to one another via degassing channels, so that gas escaping from a battery cell 51 can be discharged via the degassing channels of the support layer 7 .
- the support layer 7 consists of a foamed polyurethane and is deformable. In the event of a ground collision of the drive battery 1 installed in the motor vehicle, the base wall 33 may be deformed together with the support layer 7 and can thus absorb collision energy through deformation to protect the battery cell layer 5.
- the adhesive layers 9, 11, 13 of the embodiment can be formed by polyurethane foam.
- FIG. 2 shows the state before the drive battery 1 is mounted on a body 100 .
- the body 100 is not shown in full in Fig. 1, but essentially only an underbody 105 of the body 100.
- the body 100 or the underbody 105 has a left side sill 107 and a right side sill 108, i.e. longitudinal members.
- Drive battery 1 has a drive battery housing 3 as described above, which essentially has the same fleas over its entire extent - with the exception of an attached additional housing in the rear area of drive battery 1.
- Battery cell layer 5 is housed in drive battery housing 3.
- Power electronics for example, are housed in the additional housing.
- the drive battery 1 is mounted from below on the floor assembly 105 by means of screw connections 121, 123 and, if necessary, additionally by adhesive connections.
- FIG. 3 shows a very schematic sectional view of body 100 along a y-direction and a z-direction.
- the section runs through a passenger compartment 109 of the motor vehicle.
- the bottom left and bottom right in FIG. 2 show the side skirts 107, 108, on which the drive battery housing 3 is mounted from below by means of screw connections 121.
- the traction battery housing 3 is mounted at its peripheral flange 34, 36 to the underbody 105 with a gasket 19 interposed therebetween.
- a cross member 115, 116, 117, 118 of the floor assembly 105 is shown schematically in the sectional view.
- the drive energy storage housing 3 is connected to the cross member 115, 116, 117, 118 by means of screw connections 123 and additionally glued.
- the mounted drive energy storage housing 3 forms a floor of the floor assembly 105 at least in sections and extends over the entire width of the floor assembly 105 between the left side sill 107 and the right side sill 108.
- the seal 19 seals the passenger compartment 109 downwards. Due to the sandwich-like structure of the drive battery 1 and the bonding of the layers to one another, the drive battery 1 has high bending and torsional rigidity. As a result, the mounted drive battery 1 can interact with the floor assembly 105 accordingly, so that the motor vehicle has greater bending and torsional rigidity overall. In other words, the drive battery 1 can take over a body structure function particularly well due to the structure described above.
- FIG. 4 shows only the floor pan 105 without the drive battery 1 in a perspective view from below.
- the floor assembly 105 behind front wheel houses or behind a front axle has a front cross member structure 111 with a so-called front end wall, which delimits the passenger cell to the front of the vehicle and front ends of the side skirts 107 and 108 with each other.
- the floor assembly 105 has a rear cross member structure 113 in front of the rear wheel housings or in front of a rear axle, which connects the rear ends of the side skirts 107 and 108 to one another and which is arranged in the area of a rear bench seat (not shown) that forms a second row of seats in the motor vehicle.
- the floor pan 105 also has further cross members between the front cross member structure 111 and the rear cross member structure 113 , such as the seat cross members 115 , 116 , 117 in the area of a front row of seats and a B pillar of the body 100 .
- a heel plate cross member 118 which also forms a further cross member, is arranged in the area of the rear row of seats. All cross members 115, 116, 117, 118 run between the left side sill 107 and the right side sill 108 and are connected to them.
- the area between the side sills 107 and 108 and the respective cross member structures 111 and 113 or the further cross members 115, 116, 117, 118 is open.
- the floor assembly 105 is designed without a floor panel between these supports.
- FIG. 5 shows the floor assembly 105 with the installed drive battery 1 in a perspective view obliquely from above.
- the hatched areas between the side sills 107 and 108 and the front cross member support structure 111 and the rear cross member structure 113 of the floor pan 105 show an upper side of the drive battery 1, in particular the drive battery housing 3 and the additional housing 37, in the open areas between the respective supports of the floor assembly 105.
- the top of the drive battery 1 forms a floor of the passenger compartment 109 in the hatched areas and thus replaces a conventional floor panel.
- the drive battery 1 extends from a front cross member structure 111 with an end wall to a rear cross member structure 113, which connects the rear ends of the side skirts 107 and 108 to one another, ie to a rear wheel house of the floor assembly 105 below a rear bench seat, which forms the second row of seats.
- an assembly sealing flange 36 of the drive battery housing 3 is in contact with the corresponding components of the floor assembly 105 so that the drive battery housing 3 and the floor assembly 105 interact to form a fluid-tight floor of the passenger compartment 109 of the motor vehicle.
- the peripheral assembly sealing flange 36 is located in a sealing plane.
- the floor assembly 105 has no floor panel and thus free spaces between the adjacent cross members/cross member structures. These free spaces are closed by the drive battery housing 3 and the additional housing 37 .
- 65% of the underbody 105 between the front cross member structure 111 and the heel plate support 118 without the drive battery housing 3 between the side sills 107, 108 and the cross member structures 111 and 113 are open at the bottom.
- the drive battery 1 has the additional housing 37, which is placed on the drive battery housing 3 in the rear area of the drive battery housing 3, in the area under the rear seat bench, i.e. behind the heel plate cross member 118.
- the additional housing 37 electrical and electronic components of the drive battery 1 are housed, such as power electronics.
- the auxiliary housing 37 protrudes into the space between the heel plate cross member 118 and the rear cross member structure 113 .
- a top of the drive battery case 3 is in Essentially flat.
- FIG. 3 it is formed from a housing lower part 33 and a housing upper part 35, with the housing lower part 33 having a housing lower part flange 34 and the housing upper part 35 having a housing upper part flange 36, with the housing lower part 33 and the housing upper part 35 being connected via the housing lower part flange 34 and the housing upper part flange 36 are connected to one another, and wherein the housing upper part flange 36 is designed for mounting the drive battery housing 33 on the underbody 105.
- a seal 37 is arranged between the housing upper part flange 36 and the housing lower part flange 34 .
- the seal 19 is arranged between the housing upper part flange 36 and the base assembly 105 .
- the drive battery housing 3 is connected to the floor assembly 105 via the screw connections 21 via the assembly sealing flange 34 , 36 . Furthermore, the drive energy storage housing 3 or the upper part 35 of the housing is connected to the crossbeams 115 , 116 , 117 , 118 via the screw connections 23 .
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020237039300A KR20230171467A (ko) | 2021-07-23 | 2022-07-22 | 자동차용 구동 배터리 및 이러한 구동 배터리를 포함하는 자동차 |
CN202280042349.4A CN117480669A (zh) | 2021-07-23 | 2022-07-22 | 用于机动车的驱动蓄电池和具有这样的驱动蓄电池的机动车 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021119168.8A DE102021119168A1 (de) | 2021-07-23 | 2021-07-23 | Antriebsbatterie für ein Kraftfahrzeug und Kraftfahrzeug mit derartiger Antriebsbatterie |
DE102021119168.8 | 2021-07-23 |
Publications (1)
Publication Number | Publication Date |
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WO2023002047A1 true WO2023002047A1 (de) | 2023-01-26 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/EP2022/070695 WO2023002047A1 (de) | 2021-07-23 | 2022-07-22 | Antriebsbatterie für ein kraftfahrzeug und kraftfahrzeug mit derartiger antriebsbatterie |
Country Status (4)
Country | Link |
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KR (1) | KR20230171467A (de) |
CN (1) | CN117480669A (de) |
DE (1) | DE102021119168A1 (de) |
WO (1) | WO2023002047A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023161100A1 (de) * | 2022-02-22 | 2023-08-31 | Bayerische Motoren Werke Aktiengesellschaft | Antriebsbatterie für ein kraftfahrzeug und kraftfahrzeug mit derartiger antriebsbatterie |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102022118977B3 (de) | 2022-07-28 | 2023-10-05 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Unterbodenschutzvorrichtung zur Anordnung unterhalb einer Traktionsbatterie am Unterboden eines zumindest teilweise elektrisch antreibbaren Kraftfahrzeugs |
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JP2010186715A (ja) | 2009-02-13 | 2010-08-26 | Mitsubishi Heavy Ind Ltd | 組電池の放熱構造及び組電池 |
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DE102018133426B4 (de) | 2018-12-21 | 2022-07-14 | KÖNIG METALL GmbH & Co. KG | Mehrteiliges multifunktionales batteriegehäuse |
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2021
- 2021-07-23 DE DE102021119168.8A patent/DE102021119168A1/de active Pending
-
2022
- 2022-07-22 CN CN202280042349.4A patent/CN117480669A/zh active Pending
- 2022-07-22 KR KR1020237039300A patent/KR20230171467A/ko unknown
- 2022-07-22 WO PCT/EP2022/070695 patent/WO2023002047A1/de active Application Filing
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DE102007010751A1 (de) * | 2007-02-27 | 2008-08-28 | Daimler Ag | Batteriegehäuse |
DE102008059960B4 (de) * | 2008-12-02 | 2013-07-04 | Daimler Ag | Verfahren zur Herstellung einer Batterie, nach dem Verfahren hergestellte Batterie und Batterieverbund aus zwei derartigen Batterien |
DE102015219280A1 (de) * | 2015-10-06 | 2017-04-06 | Robert Bosch Gmbh | Batteriesystem mit Vergussmasse |
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Also Published As
Publication number | Publication date |
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CN117480669A (zh) | 2024-01-30 |
KR20230171467A (ko) | 2023-12-20 |
DE102021119168A1 (de) | 2023-01-26 |
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