EP4000122A1 - Système de boîtier servant à recevoir des moyens de stockage électriques - Google Patents

Système de boîtier servant à recevoir des moyens de stockage électriques

Info

Publication number
EP4000122A1
EP4000122A1 EP20742238.7A EP20742238A EP4000122A1 EP 4000122 A1 EP4000122 A1 EP 4000122A1 EP 20742238 A EP20742238 A EP 20742238A EP 4000122 A1 EP4000122 A1 EP 4000122A1
Authority
EP
European Patent Office
Prior art keywords
frame
housing arrangement
thickness
elements
arrangement according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20742238.7A
Other languages
German (de)
English (en)
Inventor
Björn SCHOLEMANN
Turan NURCAN
DR. Elisabeth DANGER
Bünyamin ÖZCAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Muhr und Bender KG
Original Assignee
Muhr und Bender KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Muhr und Bender KG filed Critical Muhr und Bender KG
Publication of EP4000122A1 publication Critical patent/EP4000122A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch 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
    • H01M10/6554—Rods or plates
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/236—Hardness
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • Housing arrangement for accommodating electrical storage means
  • the invention relates to a housing arrangement for receiving electrical Speicherermit tel for an electric motor-driven motor vehicle and a method for producing such a housing arrangement.
  • An electric vehicle includes, among other things, an electric machine as a drive source, which is electrically connected to electrical storage means. In the drive mode, the electrical machine converts electrical energy into mechanical energy for driving the motor vehicle.
  • the electrical storage means which are also referred to as Batte rie or accumulator, are usually included in a battery box that is attached to the vehicle body on the underside of the vehicle.
  • the battery housing for a vehicle driven by an electric motor is known.
  • the battery housing comprises a trough part with a base and side walls formed thereon and a frame structure which surrounds the trough part on the outside and which forms a hollow chamber.
  • a housing arrangement for receiving electrical shear storage means for an electrically drivable motor vehicle is known.
  • the housing assembly includes a tub assembly and a lid assembly.
  • the tub assembly and / or cover assembly has a first molded part and a second molded part, which are made of flexibly rolled metallic material and connected to each other so that they have a variable sheet metal thickness in the longitudinal direction of the respective molded part.
  • a battery holder for a motor vehicle is known from DE 10 2016 108 849 B3, which has a floor panel, a laterally encircling frame and a cover.
  • the base plate and the frame are made in one piece and trough-shaped from a three-layer composite steel as a sheet metal component.
  • An inner layer is formed from an acid-resistant steel alloy and an outer layer is formed from a stainless steel alloy.
  • the battery box comprises a side wall structure with a connection profile for connecting the battery box to the motor vehicle.
  • the battery box includes side walls that are constructed from a strut construction.
  • a battery cooling arrangement for a motor vehicle is known from EP 3 026 753 A1.
  • the battery cooling arrangement comprises a first and a second metal sheet, which are connected to one another by means of roll bonding.
  • the two metal sheets are connected to one another in some areas and spaced apart from one another in other areas with the formation of cavities in order to form cooling channels.
  • the present invention is based on the object of proposing a housing arrangement for receiving electrical storage means for an electric motor-driven motor vehicle that can accommodate high loads and has a low weight. Furthermore, a corresponding method for producing such a housing arrangement is to be provided.
  • a housing arrangement for accommodating electrical storage means for driving an electrically drivable motor vehicle, comprising: a frame which comprises several frame elements made of a metallic material, at least one of the frame elements having a variable sheet metal thickness over a longest length; a base which is connected to the frame in such a way that a tight trough is formed, and a cover which is releasably connectable to the frame, the base, the frame and the cover having a receptacle include space for electrical storage media.
  • the floor can in particular have an integrated cooling structure through which a coolant can flow.
  • One advantage is that individual parts of the housing arrangement, at least the frame elements, can be individually adapted to the requirements in terms of strength and rigidity with regard to the material thickness of the respective part.
  • the dimensioning of the individual sections of the frame elements, and possibly also the base and / or cover elements, can take place individually depending on the loads to be expected.
  • material By deliberately reducing the thickness of the frame parts in less stressed areas, material can be saved, so that the housing arrangement ultimately has a low weight without sacrificing mechanical properties and can therefore be manufactured inexpensively.
  • the base, the frame and the cover can at least be connected to one another, which in the context of the present disclosure is intended to include that some of the named elements, or sections thereof, are firmly connected to one another, and / or that some of the named elements, or sections because of, are releasably connected to each other.
  • the frame elements can be manufactured separately from or integrally with the base and / or cover.
  • the frame elements can initially be manufactured individually and then connected to one another to form a circumferentially closed frame.
  • the frame elements can be connected to one another directly or optionally via corner elements.
  • the individual frame elements can also be individually connected to the respective connection edge of the floor.
  • the designs with separate frame elements can also be referred to as a built-up housing arrangement.
  • the integral design at least some of the frame elements are designed in one piece with the floor and / or with the cover. This includes, as an option, that all frame elements are made in one piece with one of the base or cover parts and together with this form an integral molded tub part or molded base part.
  • two opposite frame elements be designed in one piece with the bottom, while the frame elements extending transversely to this are designed in one piece with the cover.
  • the base frame elements molded onto the base and the cover frame elements molded onto the cover alternately form the circumferential frame over the circumference.
  • the frame comprises a first frame element and a second frame element, which are opposite each other, and a third frame element and a fourth frame element, which are opposite each other and extend transversely to the first and second frame element.
  • one or more reinforcing elements can optionally be attached to at least a partial number of the frame elements from the outside and / or inside, for example by means of welded or screwed connections.
  • the reinforcement elements can form one or more flea chambers with the wall of the associated frame element.
  • a reinforcement element can have a sheet thickness profile analogous to the variable sheet metal thickness profile of the associated frame element, or it can also have a constant sheet metal thickness.
  • the frame elements can have a flange section for connecting the cover, which also has a stabilizing effect.
  • the width of the reinforcing element that is to say the extension from the frame element to a wall section of the reinforcing element that is maximally spaced therefrom, and the width of a flange section of the frame element can at least substantially approximate one another.
  • both elements that is to say both the reinforcement element and the flange section, can absorb corresponding forces in the event of a lateral impact.
  • the width of the flange section can be at least half the width of the reinforcement element, in particular at least two thirds of the width of the reinforcement element.
  • the width of the flange section can be between 0.8 times and 1.2 times the width of the reinforcing element.
  • the third and fourth frame elements can be shorter than the first and second frame elements.
  • An average thickness of the first and second frame elements preferably deviates from an average thickness of the third and fourth frame elements from, whereby the deviation can be up or down.
  • the “average thickness” of a component with variable thickness can be, for example, the average thickness accumulated over the length of the respective component, or the average thickness between a largest and a smallest absolute thickness of the component.
  • the mean thickness is equal to the nominal thickness.
  • an average thickness of the first and second frame elements can each be smaller than an average thickness of the third and fourth frame elements.
  • a higher load-bearing capacity is provided on the third and fourth sides of the arrangement than on the first and second sides.
  • This refinement is well suited when the third and fourth sides are at the front and rear in the longitudinal direction of the motor vehicle, so that the third and fourth frame elements can absorb correspondingly high loads in the event of a frontal crash.
  • the mean thickness of the first and second frame elements is greater than that of the third and fourth frame elements.
  • end sections of the first and second frame elements can have a smaller sheet metal thickness than at least one intermediate section lying between the end sections.
  • end sections of the third and fourth frame elements can have a smaller thickness than at least one intermediate section of the third and fourth frame elements lying between them. This is possible without sacrificing strength in order to reduce the weight, since the end sections are located on the already very stiff corner areas of the frame.
  • the third and fourth frame elements can each have a constant sheet metal thickness over at least 0.5 times the element length, preferably at least 0.75 times the element length.
  • the sheet metal elements of the frame are made of a metallic material, in particular a steel material or light metal, such as aluminum or an aluminum alloy.
  • hardenable steel is preferably used, in particular a manganese-boron-alloyed heat-treatable steel, such as 17MnB3, 22MnB5, 26MnB5 or 34MnB5, although other steel grades are also possible.
  • the frame can be produced, for example, in such a way that the individual sheet metal elements are first produced separately and then connected to one another in a materially bonded manner, for example by means of welding. If the frame elements are made of a hardenable steel material and forming operations are to be subjected to, this can be done in the context of hot forming. For this purpose, the respective component is first heated to austenitizing temperature, then placed in the hot form in the hot-forming tool, reshaped and quickly cooled so that a martensitic structure is created.
  • the starting material that is to say an uncured sheet metal element for the frame, can have a tensile strength of at least 500 MPa.
  • the finished, ie hardened, component can have a final tensile strength of at least 900 MPa, preferably at least 1300 MPa.
  • a light metal such as aluminum or an aluminum alloy can also be used for the frame elements. This also applies to the base and / or the cover, whereby in principle the use of fiber-reinforced plastic is also possible here.
  • At least one web element can be provided which extends between the first and second frame sections and which is connected to the floor and / or to the two frame sections.
  • the Stegele element separates two chambers from each other, in each of which an electrical storage medium can be used.
  • two, three or more web elements can also be provided.
  • the first frame element and the second frame element can each have at least one connecting section for connecting the at least one web element.
  • the connecting section is preferably thinner than the intermediate sections of the first and second frame elements that are adjacent thereto.
  • the bottom can also have a connecting section for connecting the at least one web element, which is in particular thinner than the sections of the bottom that are adjacent thereto.
  • the connecting sections run transversely to the longitudinal extension of the battery housing, preferably over the entire width of the base.
  • a plurality of connecting sections can accordingly be provided which run parallel to one another.
  • a web element is supported in each case on the upper side of an associated connecting section and can be connected to the floor along the connecting section, for example in a materially bonded manner by means of welding, without being restricted to this.
  • the bottom can be composed of several sheet metal elements.
  • the sheet metal elements can each have a uniform or variable sheet metal thickness over the length of the respective sheet metal element.
  • the Blechele elements are preferably made of metallic material and can be materially connected to one another, in particular by means of welding.
  • a plurality of sheet metal elements can be provided in one plane, for example one, two or three sheet metal elements, which are arranged next to one another and are joined to one another along adjacent longitudinal edges of the sheet metal elements and form a group of sheet metal elements.
  • two sheet metal elements can be arranged one above the other, which can be connected to one another by means of a rolling process, in particular by means of roll bonding.
  • the end sections of the base can have a greater thickness than at least one intermediate section lying between them. A frame-like thick structure is thus formed, so that the bottom of the housing arrangement has a high degree of rigidity.
  • the base has an integrated cooling structure through which a coolant can flow.
  • the floor is preferably made of several aluminum sheets connected to one another by means of roll bonding.
  • the aluminum sheets are connected to one another by rolling in connection areas, with areas outside the connection areas then being pressurized so that corresponding cavities or cooling channels are formed.
  • a total cooling area formed by the hollow areas is at least 0.2 times the total area of the floor, in particular at least 0.3 times, and possibly also at least 0.5 times the total area of the floor.
  • the total cooling surface can be determined, for example, in the joining plane between the upper and lower sheet metal elements.
  • the total area of the floor can relate, for example, to the projection area in plan view or the net contact area to which electrical storage means can be set off.
  • the aluminum sheets can be spaced apart from one another in second hollow areas, which form a reinforcement structure. It is provided that the first and second hollow areas are formed separately, that is, are not fluidically connected to one another. In this case, with two hollow areas, it is provided that only the first hollow areas are flowed through by coolant, while the second hollow areas are not flowed through and bring about a structural mechanical improvement in relation to the crash properties, compressive strength and noise and vibration properties (NVH properties) .
  • the hollow areas of the bottom are preferably only formed in one of the two stacked sheet metal elements or sheet metal element groups, that is, one sheet metal element remains flat while the other sheet metal element is deformed.
  • the flat sheet metal element can have a greater thickness and / or greater strength and / or greater yield point than the formed sheet metal element.
  • the thickness of the reshaped sheet is less than 0.9 times the thickness of the flat sheet.
  • the sheet metal thickness of the flat sheet metal element can be, for example, between 0.5 and 2.5 mm, while the sheet metal thickness of the formed sheet metal element can be between 0.3 and 2.0 mm, for example.
  • the process steps of rolling and inflation limit the quality of the material to be processed due to the rolling force acting on the material and the blowing pressure.
  • the tensile strength of the floor can be above 60 MPa and / or below 900 MPa, for example.
  • individual, several or all of the aluminum sheets of the floor can have a yield strength (Rp0.2) of at least 30 MPa and at most 400 Mpa. Accordingly, it is advantageous if the material is selected for the frame in such a way that it has a correspondingly high tensile strength, which can for example be above 900 MPa.
  • a frame structure with higher strength can compensate for a floor with lower strength, so that the battery housing as a whole can withstand the stresses even in the event of a crash.
  • the two or more floor elements to be connected to one another have a high thermal conductivity of in particular greater than 100 W / mK.
  • the coefficient of thermal expansion of the material can be, for example, over 20 (10 6 / K).
  • temperature changes at the connection point between the floor and the frame can lead to shear loads due to different coefficients of thermal expansion. This load can be taken into account in a sufficient dimensioning of a hybrid connection technology.
  • the two components can be adequately protected against the ingress of moisture with a sealant and at the same time mechanically decoupled.
  • Roll bonding as a manufacturing process for producing the floor offers various advantages. Depending on the application, different aluminum alloys from soft to high-strength can be used. With higher grades, there is a strength advantage, which has a positive effect on the crash behavior.
  • the connections for the coolant can be designed specifically for the application, in particular also horizontally to the cooling plate.
  • roll bonding enables very high bursting pressures of over 10 bar and / or up to 20 bar, depending on the material, thickness variation and geometry. Another advantage is that the strength of a roll-bonded cooling floor is temperature-independent.
  • the floor which can be made in one piece (with only one upper and lower sheet metal element) or in several parts (with a group of upper and lower sheet metal elements).
  • the channel structure can be introduced on one side or on both sides.
  • a mixed steel construction is also possible for the connection technology, for example through the use of friction welding elements and / or adhesives.
  • rollbonding has strength advantages that allow a lower sheet thickness, which leads to weight savings.
  • cooling ducts produced by roll bonding have a clean duct inside compared to soldered connections, which has a favorable effect on the service life of the cooling system.
  • the tub When the frame is connected to the floor, a trough is formed which is preferably inherently tight. Battery fluid leaking from the tub or the ingress of dirt into the housing is effectively avoided. Due to the design of the bottom and the frame in the form described, the tub has a self-supporting structure with a high degree of rigidity and strength.
  • the surface of the base facing the cover is preferably flat, at least in the area for receiving the battery modules, that is, the changes in thickness of the base elements or the cooling channel structure are directed outwards here. This provides a flat support surface for the battery modules.
  • the cover can be designed in one or more parts, each optionally with a variable or uniform material thickness.
  • Figure 1 A shows a housing arrangement according to the invention for receiving electrical
  • FIG. 1B shows the frame and base of the housing arrangement from FIG. 1A in a perspective exploded view with the course of the material thickness drawn over the length of a first and second frame element;
  • FIG. 2A shows a first frame element of the housing arrangement from FIG. 1A as an individual with a schematically plotted thickness profile
  • FIG. 2B shows the thickness profile of the first frame element from FIG. 1A and FIG. 2A as a detail
  • FIG. 3A shows a third frame element of the housing arrangement from FIG. 1A as an individual with a schematically plotted thickness profile
  • FIG. 3B shows the thickness profile of the third frame element from FIG. 1A or FIG. 3A as a detail;
  • FIG. 4A shows the cover of the housing arrangement from FIG. 1A with a schematically applied thickness profile of the cover elements
  • Figure 4B shows the thickness profile of the first and second cover element
  • FIG. 4C shows the thickness profile of the third cover element from FIG. 1A or respectively
  • Figure 5 shows a housing arrangement according to the invention for receiving electrical
  • FIG. 6A schematically shows a cross section through a frame section with the orientation of the variable thickness profile drawn in in a first embodiment
  • FIG. 6B schematically shows a cross section through a frame section with the orientation of the variable thickness profile drawn in in a second embodiment
  • FIG. 6C schematically shows a cross section through a frame section with the orientation of the variable thickness profile drawn in in a third embodiment
  • Figure 7A shows a housing arrangement according to the invention for receiving electrical
  • FIG. 7B shows the housing arrangement according to FIG. 7A in a perspective exploded view from obliquely below (without cover);
  • FIG. 8A shows the bottom of the housing arrangement according to FIG. 7A as a detail obliquely from below;
  • FIG. 8B shows the bottom of the housing arrangement according to FIG. 7A as a detail obliquely from above;
  • FIG. 9 shows a method according to the invention for producing a frame element and / or cover element for a housing arrangement according to the invention in one embodiment;
  • FIG. 10A shows the base for a housing arrangement according to FIG. 7A in a modified embodiment as a detail from below;
  • FIG. 10B shows a detail of the base from FIG. 10A according to section line X-X
  • Figure 1 1 A a connector for a floor in a modified first Auspar approximately
  • FIG. 1 1 B shows a connection piece for a floor in a modified second embodiment
  • FIG. 12A shows a base for a housing arrangement according to FIG. 7A in another
  • FIG. 12B shows a base for a housing arrangement according to FIG. 7A in another
  • FIGS. 1A to 4C show a housing arrangement 2 according to the invention, in which electrical storage means 3, 3 'can be received, in a first embodiment.
  • a housing arrangement 2 can be connected to the body of a motor vehicle.
  • the electrical storage means 3, 3 ‘are used to store electrical energy with which an electric motor of the electrically driven motor vehicle can be provided with electricity ver; they can also be referred to as battery modules.
  • the housing arrangement 2 has a base 4, a frame 5 and a cover 6.
  • the bottom 4 and the frame 5 are sealingly connected to one another, for example by means of welding or by means of screw connections, and when joined together form a trough for receiving the storage means 3.
  • the cover 6 can be detachably connected to the frame 5, for example by means of screw connections (not shown).
  • web elements 8, 8 ' are optionally provided which are firmly connected to the floor 4 and / or the frame parts 31, 32, for example by means of welding or screw connections (not shown).
  • the bottom 4 can be composed of one or more elements.
  • the floor Before lying, the floor has three base plate elements 9, 10, 11, which extend transversely to the longitudinal extent of the battery box.
  • One or more of the base plate elements can have a variable thickness over the respective length. It goes without saying that, depending on the respective structural framework conditions of the battery box, a one-piece base or a base composed of two, four or more base plate elements is also possible. If one or more of the floor elements 9, 10, 11 have a variable thickness, this is preferably produced by flexible rolling.
  • the frame 5 comprises four individual frame elements which can be produced separately and then connected to one another or to the floor 4. In this way a built tub assembly is formed.
  • the individual frame elements are preferably each made of flexibly rolled sheet steel, so that they have a variable sheet thickness over the length of the respective element.
  • the frame elements can also be referred to as frame parts.
  • the frame 5 has a first frame element 31 and a second frame element 32, which lie opposite one another, and a third and a fourth frame element 33, 34, which lie opposite one another and run transversely to the first and second frame elements.
  • the frame 5 is connected to the floor 4 in such a way that the first frame element 31 is attached to a first edge area 35 of the floor 4 and the opposite, second frame element 32 is correspondingly attached to a second edge area 36 of the floor.
  • the third frame element 33 is attached to a third edge region 37 of the floor 4.
  • the fourth frame element 34 opposite to this is attached to a fourth edge region 38 of the base 4.
  • the first and second frame elements 31, 32 have a variable thickness D31 over the length L31 and, in particular, are designed to be the same as one another, that is to say have the same sheet thickness profile over the length.
  • the third and fourth frame elements 33, 34 also have a variable thickness D33 over the length L33, wherein the sheet thickness profile can be the same or different.
  • an average thickness D31 m of the first and second frame elements 31, 32 is in each case smaller than an average thickness D33 of the third and fourth frame elements 33, 34.
  • the first and second frame elements 31, 32 are shown in detail in FIGS. 2A and 2B with a projection of the side surface or sheet thickness over the length. As far as the two frame elements 31, 32 are designed the same, the details described for one of the elements also apply to the other. It can be seen that the first or second frame element 31, 32 has end sections 41, 41 ‘with a reduced thickness D41.
  • Thicker sections 42, 42 ', 43 and thinner sections 44, 44' are formed between the end sections 41, 41 'and are arranged alternately. Between the thin end sections 41, 41 'and the thicker sections 42, 42' adjacent thereto, and between the thicker sections 42, 42 'and the thinner sections 44, 44' adjacent to them, and between the thinner sections 44, 44 'and the Central thick section 43 lying in between are each formed with transition sections 45, 45 ', 46, 46', 47, 47 'with continuously variable sheet metal thickness.
  • the first and second frame elements 31, 32 are designed in such a way that they have a flat surface 48 that faces outward, that is, the change in sheet metal thickness D31 is directed inward.
  • the thick Ren reinforcing sections 42, 42 ', 43 are in the overlap area with the in Arranged individual chambers to be used battery modules. They have a greater thickness D42 than the end sections 41, 41 ′′ and the sections 44, 44 '.
  • the thinner sections 44, 44 ' are arranged in the region of the webs 8, 8', which are fixed here in the assembled state. Specifically, the thinner sections 44, 44 'can have a sheet metal thickness of in particular 0.5 mm to 1.5 mm.
  • the reinforcement sections 42, 42 ', 43 can for example have a thickness D42 of 1.0 mm to 3.5 mm.
  • the third or fourth frame element 33, 34 is shown as a detail in FIGS. 3A and 3B with a projection of the side surface or sheet metal thickness profile over the length. It can be seen that the end sections 51, 51 ′′ of the third and fourth frame elements 33, 34 have a smaller thickness D51 than an intermediate section 52 in between. This is possible without sacrificing strength to reduce the weight, since the end sections 51 51 'lie on the corner areas of the frame 4 which are already quite stiff.
  • the intermediate section 52 is many times longer, in particular more than 10 times, than the end sections 51, 51 ′′. Between the end sections 51, 51 ′′ and the intermediate section with constant thickness, transition sections 53, 53 ′′ with continuously variable thickness are formed.
  • the thinner end sections 51, 51 ′′ can have a sheet thickness of 0.5 mm to 1.5 mm.
  • the intermediate reinforcement section 52 can have a thickness D52 of 1.0 mm to 3.5 mm, for example.
  • the cover 6 has a first lateral cover element 61, a second lateral cover element 62 and an intermediate cover element 63.
  • the three cover elements each have a variable thickness over their length.
  • the side cover elements 61, 62 have a mean thickness D61m which is greater than the mean thickness D63m of the third cover element 63. Furthermore, the middle cover element 63 has a width B63 which is many times greater than the width B61, B62 of the side elements 61, 62.
  • the first and second cover elements 61, 62 each have thin end sections 64, 64 ′′ and an intermediate reinforcement section 65 of greater thickness D65. Between the reinforcement section 65 and the end sections 64, 64 ′′ are each Transition sections 66, 66 'formed with variable thickness. There are also connecting areas 60, 60 'in the cover 6 can be seen, which run parallel to the webs 8, 8' and which are releasably connectable to the webs via suitable connecting means, such as screws.
  • the central cover element 63 has an inverted sheet metal thickness profile with thick end sections 67, 67 ‘and an intermediate thin section 68 of lesser thickness D68. Between the thin section 68 and the end sections 67, 67 Studentsgangs, transition sections 69, 69 ‘of variable thickness are formed.
  • FIG. 5 shows a housing arrangement 2 according to the invention in a modified embodiment. This largely corresponds to the embodiment according to FIGS. 1A to 4C, so that reference is made to the above description with regard to the similarities. The same or mutually corresponding components are provided with the same reference numerals as in the above FIGS. 1A to 4C.
  • reinforcements 71, 72, 73, 74 are placed on the frame sections 31, 32, 33, 34 from the outside and connected to them in a suitable manner.
  • the connection can, for example, be made materially by means of welding and / or non-positively by means of screws.
  • FIGS. 6A, 6B and 6C different possibilities are shown how the changes in thickness of at least a partial number of the frame elements 31, 32, 33, 34 and reinforcing elements 71, 72, 73, 74 can be designed.
  • the arrows indicate in which direction the sheet thickness profile is variable. Representing several frame or reinforcing elements, only one is shown and described here.
  • the frame element 32 has a C-shaped profile, that is to say the upper and lower flange sections 55, 56 are both bent in the same direction from the wall section 57, namely inwardly with respect to the housing. It can be seen that the frame element 32 has an outwardly facing, flat surface 58 , that is to say that the change in the sheet metal thickness D31 is directed inwards. With this configuration, a cover 6 or base 4 can be connected to the flat joining surface 58 of the frame element 32 in a simple manner.
  • the reinforcing element 72 has a U-shaped profile, with connecting flanges 75, 76 bent on the legs.
  • the connecting flanges 75, 76 have an outwardly facing change in the sheet metal thickness or an inner flat connection surface which can be connected to the flat outer surface 58 of the frame element 32 accordingly.
  • the direction of the variable sheet thickness profile changes from outside to inside, which is shown schematically by a curved line S.
  • the change in the orientation of the sheet metal thickness profiles results in a flat outer surface 77 of the legs, so that a simple connection to the vehicle body is made possible in this area.
  • the frame element 32 has an S-shaped profile, that is, the upper and lower flange sections 55‘, 56 ‘are both bent in opposite directions from the wall section 57‘.
  • the lower flange section 56 is bent inward to connect the bottom 4, while the upper flange portion 55‘ is bent outward to connect the cover 6.
  • the frame element 32 ‘ can have an inwardly pointing, flat surface 58‘, that is to say that the change in the sheet metal thickness D31 is directed outward (solid arrows P).
  • the base 4 which can optionally be designed as an integrated cooling base, can have embossed embossments which are designed correspondingly opposite to the sheet thickness profile of the lower flange section 56 '.
  • the frame element 32 can also have an outer, flat upper surface, that is to say that the change in the sheet metal thickness D31 is directed inward (dashed arrows P‘).
  • the bottom 4 can have a smooth connection surface for connecting to the lower flange portions 56 '.
  • the reinforcement element 72 has a U-shaped profile, with connecting flanges 75, 76 being bent at the leg ends.
  • the change in the sheet metal thickness of the connecting flanges 75, 76 of the reinforcing element 72 is designed correspondingly in opposite directions. This means that if the outer surface of the frame element 32 'is flat, the connection surface of the flange sections 75, 76 is flat, and vice versa, if the outer surface of the frame element 32' has a variable thickness profile, the connection surface of the flange sections 75, 76 is also variable.
  • the reinforcement element 72 In the area of the legs, the reinforcement element 72 has a flat outer surface 77 or a variable inner surface.
  • the ratio of the width B72 of the reinforcing element 72, i.e. the extent from the wall section 58 'of the frame element 32' to a wall section of the reinforcing element which is maximally spaced therefrom, to the width B55 'of the flange section 55' of the frame element 32 ' is in the present embodiment slightly smaller than two (B72 / B55 ⁇ 2.0).
  • the embodiment according to FIG. 6C largely corresponds to the embodiment according to FIG. 6B insofar as reference is made to the description thereof.
  • the same or corresponding details are provided with the same reference characters.
  • the only difference is that the width B72 of the reinforcing element 72 is adapted to the width B55 ‘of the flange section 55‘, so that the outer wall of the reinforcing element 72 is approximately in one plane with the outer edge of the flange section 32 ‘.
  • the width B72 of the reinforcing element 72 can be designed between 0.8 times and 1.2 times the width B55 ‘of the flange section 32‘.
  • FIGS. 7A, 7B and 8A, 8B show a housing arrangement 2 according to the invention in a further embodiment.
  • This largely corresponds to the embodiment according to FIG. 5 or FIGS. 1A to 4C, so that reference is made to the above description with regard to the similarities.
  • the same or corresponding components are provided with the same reference numerals as in the above FIGS. 1A to 6C.
  • the orientation of the variable sheet metal thicknesses of the frame elements and reinforcement elements can be designed, for example, according to FIGS. 6A or 6B.
  • a special feature of the present embodiment is the design of the bottom 4, which has an integrated cooling structure 12 through which a coolant can flow.
  • the base 4 can be produced from several aluminum sheets connected to one another by means of roll bonding.
  • the tensile strength of the floor 4 or a floor element 9, 9 ‘; 10, 10 ‘; 1 1, 1 1 can be less than 900 MPa, for example.
  • the frame 5 or a frame element 31, 32, 33, 34 can have a tensile strength of over 900 MPa sen aufwei.
  • a frame structure 5 with higher strength can compensate for a floor 4 with lower strength, so that the aforementioned features together lead to a stable battery box 2 with good cooling properties.
  • two or more floor elements 9, 9 ′′; 10, 10 "; 1 1, 1 1 ′′ have a high thermal conductivity of in particular greater than 100 W / mK.
  • the coefficient of thermal expansion of the material can be, for example, over 20 (10 6 / K).
  • shear loads can occur in the event of temperature changes at the connection point between the base 4 and the frame 5 due to different coefficients of thermal expansion.
  • the two components can be adequately protected against the ingress of moisture with a sealant and, at the same time, mechanically decoupled.
  • the bottom has three cooling sections 15, 16, 17 which are separated from one another by web sections 18. It is generally preferred that the number of cooling sections 15, 16, 17 corresponds to the number of storage elements 3. Between the storage elements 3, the web elements 8, 8 'are connected to the web sections 18, 18' of the base. Connections 19, 19 ′′ for circulating coolant through the hollow areas 14 can also be seen.
  • the floor elements 9, 9 '; 10, 10 '; 1 1, 1 1 'can have optional second hollow areas 20, 20', 20 ′′, in which the floor panels joined on top of one another are each designed at a distance from one another. These second hollow areas 20, 20 ′, 20 ′′ are separated from the first hollow areas 14 and serve to increase the rigidity of the floor 4 or to improve the crash properties, compressive strength and the noise and vibration properties (NVH properties).
  • FIG. 9 a method according to the invention for producing a frame element 31 for a housing arrangement 2 according to the invention is shown as an example in a possible embodiment.
  • the strip material 80 which is wound onto a coil 81 in the initial state, is processed by rolling, specifically by means of flexible rolling.
  • the strip material 80 which has a largely constant sheet metal thickness over its length before the flexible rolling, is rolled by means of rollers 82 in such a way that it has a variable sheet metal thickness along the rolling direction.
  • the strip material 80 can optionally be pre-coated with a coating that protects against rust in particular, such as a coating containing aluminum or zinc.
  • the process is monitored and controlled, the data ascertained from a sheet thickness measurement being used as an input signal for controlling the rollers 82.
  • the strip material 80 has regions with different thicknesses extending transversely to the rolling direction.
  • the strip material is rewound into a coil so that it can be fed to the next process step.
  • the flexibly rolled steel strip is separated into sheet metal blanks 83, 83 ‘.
  • two or more sheet metal blanks 83, 83 ' can be connected to one another to form a circuit board assembly 84, in particular welded.
  • the sheet metal blank 83, 83 ′ or the composite blank is formed by means of hot forming.
  • the hot forming comprises the sub-steps of heating in an oven 86, transfer to the hot forming tool 87, where the sheet metal blank 83 is formed into a frame element 31 and hardened.
  • FIGS. 10A and 10B which are described jointly below, show a base 4 for a housing arrangement according to FIG. 7A in a modified form Embodiment. This largely corresponds to the embodiment according to FIGS. 8A and 8B, to the description of which reference is made with regard to the similarities. Identical or corresponding details are provided with the same reference symbols as in the above figures.
  • a special feature of the present embodiment according to FIGS. 10A, 10B is that the base 4 is only composed of two aluminum sheets 9, 9 'connected to one another by roll bonding.
  • the cooling structure 12 can be clearly seen, which has been produced by pressurizing the areas 14 of the lower aluminum sheet 9 ′ that lie outside the connection areas 13 and in which corresponding flea spaces or cooling channels are formed.
  • the connection piece 19 for the flow can be seen as a detail in FIG. 10B, it being understood that the connection 19 'for the return can be designed analogously.
  • a special feature is that the end of the cooling channel 14 to which the connection piece 19 is connected lies in a plane with the cooling structure.
  • An alternative embodiment of an end section of the cooling channel 14 or connection 19 is shown in Figure 11A. Here the end of the channel penetrates the floor 4 upwards.
  • a further alternative embodiment of an end section of the cooling channel 14 or connection 19 is shown in FIG. 11B. Here the end of the channel is at the bottom, so that the connection 19 is also arranged below the base 4.
  • FIGS. 12A and 12B schematically show further alternative embodiments for a base 4 for a housing arrangement. This largely corresponds to the embodiment according to FIGS. 10A, 10B, the description of which is referred to in this respect. The same or corresponding individual units are provided with the same reference numerals as in the above figures.
  • a special feature of the embodiment according to FIG. 12A is that the cooling structure 12 is formed by parallel connecting areas 13 with linear channels 14 lying in between.
  • the connection areas 13 are formed by points, so that a grid-like cooling structure 12 results. List of reference symbols

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Body Structure For Vehicles (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un système de boîtier servant à recevoir des moyens de stockage électriques destinés à un véhicule automobile électrique, comprenant : un cadre (5) qui comprend plusieurs éléments de cadre (31, 32, 33, 34) constitués d'un matériau métallique, au moins l'un des éléments de cadre (31, 32, 33, 34) présentant une épaisseur de tôle variable sur la longueur la plus longue ; un fond (4) qui est relié au cadre (5) de telle sorte qu'une vanne épaisse est réalisée ; et un couvercle (6) pouvant être relié au cadre (5) de façon amovible, le fond (4), le cadre (5) et le couvercle (6) entourant un espace de réception destiné à des moyens de stockage électriques (3), le fond (4) présentant une structure de refroidissement intégrée à travers laquelle peut s'écouler un agent de refroidissement.
EP20742238.7A 2019-07-15 2020-07-15 Système de boîtier servant à recevoir des moyens de stockage électriques Pending EP4000122A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019210400.2A DE102019210400A1 (de) 2019-07-15 2019-07-15 Gehäuseanordnung zur Aufnahme elektrischer Speichermittel
PCT/EP2020/070044 WO2021009256A1 (fr) 2019-07-15 2020-07-15 Système de boîtier servant à recevoir des moyens de stockage électriques

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EP4000122A1 true EP4000122A1 (fr) 2022-05-25

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US (1) US20220247012A1 (fr)
EP (1) EP4000122A1 (fr)
CN (1) CN114175374A (fr)
DE (1) DE102019210400A1 (fr)
WO (1) WO2021009256A1 (fr)

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DE102020125498B3 (de) * 2020-09-30 2021-07-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kühlsegment zur Temperierung eines Batteriemoduls einer Kraftfahrzeugbatterie
JP2022091254A (ja) * 2020-12-09 2022-06-21 本田技研工業株式会社 バッテリケース構造
DE102021122913A1 (de) 2021-09-03 2023-03-09 Muhr Und Bender Kg Batteriekühlvorrichtung für ein elektrisches Batteriemodul eines Elektroantriebs
DE102021122902A1 (de) 2021-09-03 2023-03-09 Muhr Und Bender Kg Gehäuseanordnung
CN113782895B (zh) * 2021-09-09 2023-05-26 淮北银丰铝业有限公司 一种新能源汽车电池箱体
DE102021132283A1 (de) * 2021-12-08 2023-06-15 Bayerische Motoren Werke Aktiengesellschaft Energiespeichergehäuse, Kraftfahrzeug, elektrischer Energiespeicher sowie Baureihe

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EP3026753A1 (fr) 2010-11-10 2016-06-01 Valeo Systemes Thermiques Dispositif de refroidissement de véhicule, ensemble de refroidissement de batterie de commande de véhicule et procédé de fabrication d'un dispositif de refroidissement de véhicule
DE102014226566B3 (de) 2014-12-19 2016-04-28 Volkswagen Aktiengesellschaft Batteriekasten für eine Traktionsbatterie in Kraftfahrzeugen
DE102016108849B3 (de) 2016-05-12 2017-04-20 Benteler Automobiltechnik Gmbh Batteriehalter für ein Kraftfahrzeug
DE102016115037A1 (de) 2016-08-12 2018-02-15 Thyssenkrupp Ag Batteriekasten mit seitlicher Verstärkung
DE102016120826B4 (de) * 2016-11-02 2018-08-23 Kirchhoff Automotive Deutschland Gmbh Batteriegehäuse
EP3566253B1 (fr) * 2017-01-04 2022-12-28 Shape Corp. Structure de support de batterie pour un véhicule
DE102017104360A1 (de) * 2017-03-02 2018-09-06 Kirchhoff Automotive Deutschland Gmbh Batteriegehäuse
CN107123761B (zh) * 2017-05-18 2023-06-23 安徽乾源新能源科技有限公司 锌空气电池框构
CN207250598U (zh) * 2017-08-28 2018-04-17 比亚迪股份有限公司 电池托盘
CN108270050A (zh) * 2017-12-18 2018-07-10 合肥国轩高科动力能源有限公司 一种动力电池一体化液冷箱体
DE102018106399A1 (de) * 2018-03-19 2019-09-19 Muhr Und Bender Kg Gehäuseanordnung zur Aufnahme elektrischer Speichermittel und Verfahren zur Herstellung einer Gehäuseanordnung
CN108832054A (zh) * 2018-08-04 2018-11-16 丹阳科美汽车部件有限公司 一种变厚度蜂窝汽车电池包壳体结构
CN109361037A (zh) * 2018-11-07 2019-02-19 凌云工业股份有限公司上海凌云汽车研发分公司 新能源汽车电池包液冷板涨型成型方法及液密性检测方法

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CN114175374A (zh) 2022-03-11
DE102019210400A1 (de) 2021-01-21
US20220247012A1 (en) 2022-08-04

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