EP4200932A1 - Batterieschale aus kunststoff aufweisend ein einlegeteil, werkzeug sowie verfahren zum herstellen einer batterieschale, traktionsbatterie und kraftfahrzeug - Google Patents
Batterieschale aus kunststoff aufweisend ein einlegeteil, werkzeug sowie verfahren zum herstellen einer batterieschale, traktionsbatterie und kraftfahrzeugInfo
- Publication number
- EP4200932A1 EP4200932A1 EP22757975.2A EP22757975A EP4200932A1 EP 4200932 A1 EP4200932 A1 EP 4200932A1 EP 22757975 A EP22757975 A EP 22757975A EP 4200932 A1 EP4200932 A1 EP 4200932A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insert
- battery
- battery shell
- indentation
- tool
- 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
Links
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
- 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
- H01M50/229—Composite material consisting of a mixture of organic and inorganic materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
-
- 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
- H01M10/04—Construction or manufacture in general
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/218—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
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14163—Positioning or centering articles in the mould using springs being part of the positioning means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7146—Battery-cases
-
- 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
- Battery shell made of plastic having an insert, tool and method for producing a battery shell, traction battery and motor vehicle
- the invention relates to a battery shell made of plastic, having an insert, a tool and a method for producing a battery shell, a traction battery and a motor vehicle.
- the invention relates to a battery shell, in particular a battery shell of a traction battery, the battery shell having a base and at least four side walls, the battery shell having an inside and an outside, the battery shell being formed in a hybrid construction from an insert and a molding compound.
- the object of the invention is to provide an improvement or an alternative to the prior art.
- the task is solved by a battery tray, in particular a battery tray of a traction battery, the battery tray having a base and at least four side walls, the battery tray having an inside and an outside, the battery tray having a hybrid construction consisting of an insert and a molding compound is formed, wherein the battery shell has at least one indentation, preferably two indentations and particularly preferably more than two indentations, one indentation extending in an area of the battery shell formed by the molding compound, one indentation having a point that corresponds to the insert and wherein a distance from the corresponding point of the indentation to the insert is less than or equal to 2 mm, preferably less than or equal to 1 mm and particularly preferably less than or equal to 0.5 mm.
- a “battery shell” is understood to mean a housing component of a battery, in particular a traction battery.
- a battery shell is set up to accommodate components of a battery and accordingly has a receiving space for accommodating components, so that they can be protected from external influences by the battery shell and/or at least indirectly secured in the battery shell.
- a battery shell is preferably understood to mean a lower battery shell or an upper battery shell, with the lower battery shell and upper battery shell preferably together forming the essential components of the housing of a traction battery.
- a battery shell has a “bottom” and, preferably, a traction battery with a substantially rectangular outline, at least four “side walls”.
- the bottom and side walls of the battery tray form the capacity of a battery tray, with the capacity of the battery tray describing the “inside” of the battery tray.
- the “outside” of the battery tray is on the side of the floor and side walls that faces away from the capacity.
- hybrid design a design of battery shells, in which different components with partially different properties can be combined to form a battery shell.
- an insert as a solid body, having a higher tensile strength than a molding compound, is connected to the molding compound to form a hybrid battery shell. Due to its high degree of geometric variability, the molding compound can make it possible to achieve an almost unlimited geometric complexity of the battery shell. At the same time, the insert part, which is high-strength compared to the molding compound, can be used to achieve a battery shell with outstanding structural-mechanical properties.
- the hybrid construction of a battery shell can improve characteristics of the battery shell compared to the sole use of a molding compound.
- an “insert” is understood to mean a solid body which can be introduced into a battery shell to reinforce the battery shell, in particular for local reinforcement.
- an insert can be understood to mean a stiffening element and/or a local stiffening means.
- An insert preferably has a higher tensile strength than a consolidated molding composition.
- An insert is preferably a semi-finished product, in particular a semi-finished product which extends at least in regions with a constant cross-section in the direction of main extension.
- An insert is preferably formed from a metallic material.
- an insert is formed from plastic, in particular from a thermoplastic plastic or a duroplastic plastic, with one being made of a Plastic molded insert can also have a fiber volume content, whereby additional stiffening of the insert can be achieved.
- an “insert” is understood to mean an insert which can remain rigid and dimensionally stable under the influence of the melting pressure and/or the temperature of the molding compound when the battery shell is formed, i.e. preferably not plastically deformed.
- an insert can during the handling of the insert be dimensionally stable, preferably when inserting the insert into the tool
- the insert can deform during the molding of the battery shell, in particular due to the melting pressure when the insert is overflowed with molding compound, provided it is an insert with a thermoplastic matrix.
- An insert is preferably dimensionally stable, in particular an insert consisting of a metal or an insert comprising a duroplastic is preferably dimensionally stable.
- a dimensionally stable insert can be understood to mean a dimensionally stable insert.
- An insert in a battery shell preferably has a flatness tolerance according to DIN ISO 1101 with a tolerance range of less than or equal to 4 mm, preferably with a tolerance range of less than or equal to 2 mm and particularly preferably with a tolerance range of less than or equal to 1 mm.
- an insert comprising a thermoplastic material can only be dimensionally stable in its core until it reaches its melting temperature, so that in the case of an insert comprising a thermoplastic material, it can be provided that the core of this insert is before or during the off not to heat up to the melting temperature when shaping the battery shell.
- the use of an insert made of a thermoplastic material does not differ fundamentally from the use of a duroplastic or metal insert, particularly since an insert can remain dimensionally stable even when placed in the tool and can thus also be placed upright.
- An insert preferably remains dimensionally stable even under the influence of the melt pressure and the temperature of the molding composition.
- an insert for the battery shell proposed here can be demonstrated in the micrograph of a cross section of the battery shell intersecting the insert.
- An insert is preferably not plastically deformed.
- a material connection between the insert and the molding compound can be achieved. It is expressly pointed out here that a material connection is no indication against the use of an insert.
- an insert with a thermoplastic base material is heated before it is introduced into the article cavity, in particular to a temperature that is slightly below the melting temperature of the base material, in particular to a temperature of more than or equal to 5 °C below the melting temperature of the thermoplastic base material, and the molding compound which also has a thermoplastic material suitable for a cohesive connection as the base material, heats up the insert part on its surface in such a way that a cohesive connection between the
- an insert does not mean an organo sheet heated above the melting temperature, since an organo sheet heated above the melting temperature can form folds and/or bulges due to the temperatures and forces that act on the organo sheet when a battery shell is formed, resulting in an organo sheet cannot be reproducibly and/or loaded path-fairly introduced into a battery shell having a molding compound, in particular not using an injection molding process or a compression molding process.
- thermoplastic or a duroplastic material is to be thought of in particular, which is optionally mixed with a fiber material, in particular glass fiber, carbon fiber, aramid fiber or the like.
- the molding composition preferably has fibers with a length of less than or equal to 15 mm, particularly if the molding composition is a polyamide, preferably fibers with a length of less than or equal to 12 mm and particularly preferably fibers with a length of less than or equal to 10 mm.
- the molding composition expediently has fibers with a length of less than or equal to 35 mm, particularly if the molding composition is a polypropylene, preferably fibers with a length of less than or equal to 30 mm and particularly preferably fibers with a length of less than or equal to 25 mm.
- the molding composition especially if the molding composition is a duroplastic SMC (sheet molding compound), fibers with a length of less than or equal to 65 mm, preferably fibers with a length of less than or equal to 57 mm and particularly preferably fibers with a length of shorter than or equal to 50 mm.
- the molding compound preferably has fibers with a length of greater than or equal to 8 mm, particularly if the molding compound is a thermosetting SMC, preferably fibers with a length greater than or equal to 10 mm and more preferably fibers having a length greater than or equal to 12 mm.
- a “indentation” is understood as meaning a hollow shape in relief on the surface of the battery shell.
- An indentation is preferably a concave and/or convex depression in the surface of the battery shell, and an indentation can preferably have a large number of spatial curvatures.
- the geometry of an indentation corresponds to a segment of a sphere.
- the material thickness of the molding compound decreases between the surface of the battery shell and the insert; in particular, the material thickness of the molding compound can also drop locally to 0 mm.
- an indentation can be understood to mean a local reduction in the material thickness of the molding compound in relation to the insert.
- An indentation preferably has a longitudinal extent which corresponds to at least three times a transverse extent of the same indentation and preferably runs transversely to the preferred direction of designated endless fibers in a designated insert.
- An indentation in the battery tray corresponds to an elevation in the article cavity of the tool for forming the battery tray.
- an indentation can serve as a support and as a means for reproducible positioning of the insert within the battery shell, which can ensure that the insert remains in place when the molding compound overflows.
- an indentation is used for quality control of a manufactured battery shell, since the positioning of the insert in the battery shell can be checked by means of one or more indentations.
- a “distance” is understood to mean a distance between the insert and the surface of the battery shell, in particular in the area of an indentation.
- the distance from the corresponding point of the indentation to the insert is preferably less than or equal to 0.1 mm and particularly preferably equal to 0 mm .
- a battery shell is specifically proposed here, which has a form-fitting and/or material-locking connection between at least one insert part and the molding compound.
- the insert advantageously enables local reinforcement of the battery shell, while the molding compound enables a geometrically complex shape to be produced.
- an insert also enables reproducible positioning of the insert within the battery shell, since an insert can also be positioned reproducibly in a tool for producing a battery shell, in particular with respect to the molding compound flowing during the molding of the battery shell.
- a reproducible local reinforcement of the battery shell can thus also be achieved, preferably a reproducible reinforcement of the battery shell that is appropriate for the load path.
- an insert prevents the formation of folds and/or buckling of a local reinforcement measure and thus a reduction in the overall component rigidity.
- the surface quality of the battery shell can also be improved in some cases, because no endless fibers introduced for reinforcement are pressed onto the surface of the battery shell by the overflowing molding compound.
- thermally induced expansion of the local reinforcement can be reduced or prevented by using an insert.
- the use of an insert can reduce or prevent a change in the position of a local stiffening measure in the tool, in particular during the molding of the battery shell and/or by suitably designing the tool, due to overflowing molding compound.
- a battery shell can also have a plurality of inserts, in particular two inserts, three inserts, four inserts, five inserts, six inserts, seven inserts, eight inserts, nine inserts and so on.
- a battery shell preferably has a plurality of indentations, in particular a plurality of indentations arranged to correspond to one another, preferably a plurality of indentations arranged symmetrically to the insert part.
- An indentation can advantageously achieve a reproducible and load path-oriented positioning of an insert that locally reinforces the battery shell. Furthermore, an indentation can be used for quality control of the battery tray.
- the insert is continuously fiber-reinforced.
- An “endless fiber-reinforced” insert is understood to mean an insert comprising a thermoplastic and/or a duroplastic material, the insert comprising endless fibers in the form of fabrics and/or in the form of unidirectional tapes and/or in the form of scrims.
- An endless fiber-reinforced insert preferably has unidirectional endless fibers oriented primarily in the longitudinal direction of the insert.
- an insert with a comparatively high stiffness can be used, which means that the battery shell also has a high local
- a contact area between the insert and the molding compound is particularly preferably greater than or equal to 50% of the surface of the insert, preferably greater than or equal to 55% of the surface of the insert and particularly preferably greater than or equal to 60% of the surface of the insert.
- a "contact surface” between an insert and the molding compound is understood to mean the surface of the insert wetted by the molding compound.
- the surface of the insert wetted by the molding compound is preferably understood to mean the surface of the insert on which the molding compound has a thickness of greater than or equal to 0.5 mm, preferably a thickness of greater than or equal to 1.0 mm and particularly preferably a thickness of greater than or equal to 1.5 mm.
- a contact area between the insert and the molding composition is greater than or equal to 65% of the surface of the insert, preferably greater than or equal to 70% of the surface of the insert and particularly preferably greater than or equal to 80% of the surface of the insert. Also preferably, a contact area between the insert and the molding composition is greater than or equal to 85% of the surface of the insert, preferably greater than or equal to 90% of the surface of the insert and particularly preferably greater than or equal to 95% of the surface of the insert.
- a contact area between the insert and the molding compound is greater than or equal to 25% of the surface of the insert, preferably greater than or equal to 35% of the surface of the insert and particularly preferably greater than or equal to 45% of the surface of the insert.
- the value for the contact area can also be used to ensure that part of the area of the insert is completely wetted with the molding compound. Furthermore, it can preferably be achieved that at least a partial area of the insert can be surrounded on both sides by the molding compound, as a result of which a particularly advantageous form-fitting connection can be achieved.
- the insert part can be introduced practicably and/or conveniently into a tool for molding the battery shell, since the insert part is in the tool before the designated flow of the molding compound at least partially on two sides of a partial area of the designated insert part is arranged at a distance from the border of the mold cavity, which means that it can be handled well on the one hand, especially on both sides, and on the other hand, in the case of a pre-tempered insert part, it does not lose its desired temperature difference to the mold wall so quickly, since a direct Contact between the tool wall and the insert can be reduced or largely avoided.
- the value of the contact surface proposed here can be used to reduce any component distortion due to the at least partial form fit, in particular the form fit on both sides, between the insert and the molding compound, since the components consisting of the molding compound and the insert can be arranged symmetrically to each other.
- the value for the contact surface can also be used to ensure that the insert part can be completely enclosed by the molding compound, at least in some areas, in relation to its lateral surface.
- the above values for the contact area should not be understood as sharp limits, but rather that they should be able to be exceeded or fallen below on an engineering scale without departing from the described aspect of the invention. In simple terms, the values should provide an indication of the size of the contact surface area proposed here. Also preferred is a contact area between the insert and the molding compound that is less than or equal to 99.5% of the surface of the insert, preferably less than or equal to 99% of the surface of the insert and particularly preferably less than or equal to 97.5% of the surface of the insert.
- a contact area between the insert and the molding compound is advantageously less than or equal to 95% of the surface of the insert, preferably less than or equal to 92.5% of the surface of the insert and particularly preferably less than or equal to 90% of the surface of the insert.
- the value of the contact area proposed here enables a reproducible fixation of the insert within the designated tool for shaping the battery shell and thus also a reproducible positioning of the insert within the battery shell.
- the means for reproducibly positioning the insert in the tool which preferably correspond to the contact surface, can prevent a change in the position of the insert in the tool due to overflowing molding compound during the molding of the battery shell being so pronounced that the insert in the area reaches the wall of the article cavity between corresponding means for reproducible positioning.
- the above values for the contact area should not be understood as sharp limits, but rather that they should be able to be exceeded or fallen below on an engineering scale without departing from the described aspect of the invention. In simple terms, the values should provide an indication of the size of the contact surface area proposed here.
- the insert is preferably produced using a pultrusion process.
- a “pultrusion process” is understood to mean an automated or automated continuous process for the production of inserts, in particular endless fiber-reinforced inserts, which is preferably suitable for large-scale production.
- inserts with a very high degree of geometric and structural-mechanical design freedom can advantageously be produced reproducibly in large-scale production.
- an insert part can be optimally adapted to the needs of the battery shell in terms of its properties.
- an insert part can have a complex geometry and preferably a homogeneous structure of endless fibers. These properties can be demonstrated in a profile section of the battery shell, so that an insert manufactured using the pultrusion process can also be verified by means of a profile section.
- the battery shell is formed using an injection molding process or a pressing process.
- injection molding process is understood to mean a primary shaping process, in which the material to be processed, in particular plastic, is liquefied by means of an injection molding machine and injected under pressure into a mold, the injection mold becomes .
- the material returns to its solid state as a result of cooling and/or a crosslinking reaction and can be removed as a component after the injection molding tool has been opened.
- a “pressing process” is understood to mean a primary molding process in which the molding compound is introduced into the cavity of an associated pressing tool in a first step, with the pressing tool being closed in a second step, in particular using a pressure piston. By closing the pressing tool, the The molding compound has the shape specified by the pressing tool
- the pressing tool is preferably temperature-controlled.
- a pressing process can also be understood as a direct compounding process (D-LFT), in which a fiber material is drawn into an extruder, impregnated there with the already melted matrix polymer, in particular a thermoplastic, and transferred to an injection piston and is then introduced as a molding compound into the pressing tool.
- D-LFT direct compounding process
- An indentation expediently has a rectilinear course at least in regions at a point corresponding to the insert part.
- an indentation should be considered here, which has the shape of a groove at least in some areas. Particularly preferably, it should be remembered that an indentation with the shape a groove corresponds to a guide area within the article cavity of the tool for producing the battery shell, with an indentation inside the battery bowl enabling the insert part to rest linearly on the guide area in the article cavity.
- the course of the deepest point of the indentation which is rectilinear at least in some areas, ends at least on one side in the plane of the solid surface of the battery shell. In this way, notch stresses in this area can be avoided or reduced.
- An indentation is also expediently in the form of a groove.
- an indentation at a point corresponding to the insert has, at least in regions, a plane which runs parallel to a plane of the insert.
- parallel to a plane is understood to mean that the plane of the indentation runs essentially parallel to the plane of the corresponding insert, with the normal vectors of the respective planes having a difference angle of less than or equal to the corresponding manufacturing tolerances and positioning tolerances 5°, preferably a difference angle of less than or equal to 2°, preferably a difference angle of less than or equal to 1° and particularly preferably a difference angle of less than or equal to 0.5°
- the planes preferably even coincide.
- an indentation should be considered here, which with a stop in an article cavity in a designated Corresponds tool for producing the battery shell, wherein the stop for reproducible positioning of the insert is set up in the battery shell.
- an indentation runs horizontally and/or vertically relative to the bottom of the battery shell, at least in certain areas.
- An indentation expediently has a transverse extent, the transverse extent having a width of greater than or equal to 1 mm at its widest point and/or the transverse extent having a width of less than or equal to 20 mm at its widest point.
- a "transverse extent” of the indentation is understood to mean the extent of the indentation which the indentation has transversely from a direction of symmetry of the indentation.
- An indentation preferably has a width of greater than or equal to 2 mm, preferably greater than or equal to 3 mm and particularly preferably greater than or equal to 5 mm.
- an indentation preferably has a width of less than or equal to 25 mm, preferably a width of less than or equal to 15 mm and particularly preferably a width of less than or equal to 10 mm
- an indentation merges steadily and/or continuously and dif ferentiably into the immediately adjacent and at least partially planar surface of the battery shell.
- An indentation preferably encloses an edge of the insert at least in regions, preferably two edges of the insert at least in regions.
- An “edge” is understood to be a continuous, but not differentiable, transition between two surfaces of the insert.
- an indentation is proposed which is provided for the positioning of the insert as a stop and/or as a support and/or as a guide, the indentation corresponding to two, in particular at least two and/or three, surfaces of the insert.
- an indentation on the side of the region of the battery shell that is opposite the insert part has a corresponding opposite indentation; the opposite indentations are preferably arranged symmetrically to one another.
- a geometry of the battery shell which corresponds to a means for reproducibly positioning the insert part within the article cavity and/or within the battery shell.
- a geometry that corresponds to a guide area within the article cavity is preferably considered here. It should preferably be considered that the opposite indentation is arranged opposite one another in relation to at least one axis of symmetry, preferably two axes of symmetry.
- an opposite indentation can also be contiguously connected to the corresponding indentation, with preferably at least two edges of the insert being surrounded by the contiguous indentation.
- a first indentation has a second indentation on the side of the area of the battery shell that is opposite the insert part, which is arranged offset to a position opposite the first indentation.
- An insert is expediently arranged in an inner reinforcement of the battery shell, in particular in a frame.
- An “internal stiffening means” is understood to mean a geometric configuration of the battery shell on the inside of the battery shell, which is designed to stiffen the battery shell.
- An internal stiffening means is preferably a frame.
- a frame is understood to mean a geometry exhibited in the interior of the battery shell, which is set up to stiffen the battery shell.
- a frame is preferably a longitudinal frame, with a longitudinal frame extending in the longitudinal direction of the battery shell and being set up to increase at least one area moment of inertia, particularly preferably two area moments of inertia, of a cross section of the battery shell running normal to the longitudinal direction, so that the battery shell is reinforced.
- a frame is preferably a transverse frame, with a transverse frame extending in the transverse direction of the battery shell and being set up to increase at least one area moment of inertia, particularly preferably two area moments of inertia, of a cross section of the battery shell running normal to the transverse direction, so that the battery shell is reinforced.
- a frame is preferably arranged in such a way that it is set up as a spatial separation between two designated adjacent battery cells and/or battery modules.
- a battery module can be attached to an inner stiffening means.
- a battery module is preferably carried by an inner stiffening means.
- An inner stiffening means preferably has at least one longitudinal frame and at least one transverse frame.
- the at least one longitudinal frame and the at least one transverse frame are preferably connected to one another.
- the insert part can be introduced into the battery shell in a particularly advantageous manner in line with the load path, while at the same time the available space, for example in a separating frame arranged between the designated battery modules, can be used.
- An insert is also expediently arranged in an outer reinforcement of the battery shell. The following is explained conceptually:
- an “external stiffening means” is understood to mean a geometric configuration of the battery shell on the outside of the battery shell and/or a material change in the battery shell, which is designed to stiffen the battery shell.
- An outer stiffening means is preferably set up to stiffen the bottom of the battery tray and/or at least one side wall of the battery tray.
- a profiling of at least one side wall of the battery shell is preferably considered, with the profiling of the at least one profiled side wall of the battery shell having at least one area moment of inertia of the at least one profiled side wall of the battery shell, particularly preferably two area moments of inertia of the at least one profiled side wall of the battery shell. increased compared to a side wall of a battery tray without profiling and with a comparable wall thickness and comparable material composition.
- a profiling is preferably an I-profile, a U-profile, a T-profile, a Z-profile, an L-profile, a hollow profile, a profile cumulatively composed of the aforementioned profiles or a different profiling.
- profiling can be understood to mean any geometric change compared to a planar extension of at least one side wall and/or the bottom of the battery shell.
- an external stiffening means presented here does not apply a reinforcement of a side wall of the battery tray is limited, but also two or more side walls of the battery tray, preferably all side walls of the battery tray, can have an external reinforcement.
- a side wall can be a component of an outer stiffening means.
- an insert can advantageously be arranged as a local stiffening measure in a region of the battery shell that is particularly advantageous for this purpose.
- the outer stiffening means is used to fasten the battery tray to the designated motor vehicle, so that greater loads act on the battery tray for this reason alone.
- an area of the battery shell can be reinforced in this way, which is exposed to large external loads in the event of a side pole impact.
- the insert has a thermoplastic, a duroplastic or a metallic base material.
- An insert can consist entirely of a homogeneous "base material" or, in addition to the base material, can have reinforcement, in particular in the form of glass fibers, carbon fibers, aramid fibers and/or basalt fibers.
- thermoplastic base material can be deformed in a material-dependent temperature range, whereby this process is reversible and can be repeated as often as desired by cooling and reheating until it reaches the molten state.
- thermosetting base material can no longer be deformed after it has hardened by heating or other measures.
- the molding compound preferably has a thermoplastic or a duroplastic base material.
- a polyamide is preferably thought of here, in particular a polyamide 6, a polyamide 6. 6 or a polyamide 12 .
- the molding compound can preferably contain polypropylene or polycarbonate.
- the insert has a chamfer.
- a "chamfer” is understood to mean a beveled surface on a first edge of the insert.
- a chamfer can have an angle of greater than or equal to 20°, preferably an angle of greater than or equal to 30°, more preferably an angle of greater than or equal to 40° and particularly preferably an angle of greater than or equal to 50°
- a bevel can have an angle of less than or equal to 70°, preferably an angle of less than or equal to 60°, further preferably an angle of less than or equal to 50° and particularly preferably one Angles less than or equal to 40°.
- the insert part preferably has a chamfer on the edge of the insert part that is designed to face away from the article cavity and/or from the surface of the battery shell.
- the chamfer can extend over a thickness of greater than or equal to 20% of the thickness of the insert, preferably over a thickness of greater than or equal to 40% of the thickness of the insert, more preferably over a thickness of greater than or equal to 60% of the thickness of the insert and more preferably over a thickness greater than or equal to 80% of the thickness of the insert.
- the beveled surface of the chamfer may coincide with a second edge, the second edge being located adjacent to the first edge. This can cause the insert to end in a pointed edge at least on one side, with the pointed edge having an opening angle of less than or equal to 70°, preferably an opening angle of less than or equal to 50° and particularly preferably an opening angle of less than or equal to 30 ° .
- the molding compound When the mold is closed, the molding compound overflows the insert with a moving flow front, which can change the position of the insert or damage the insert in its structure.
- the chamfer can be set up to interact with a flow front of the molding compound when molding the battery shell, in particular through the specific design of the end of the insert that first comes into contact with the flow front, in particular through a chamfer on an edge of the insert.
- an edge around which the flow front of the molding compound is designed to flow at an angle can have a chamfer and thus a beveled surface.
- the flow resistance acting on the molding compound from the insert can be reduced and/or smaller forces are transmitted from the molding compound to the insert, as a result of which any structural damage to the insert can be reduced or prevented.
- this allows the insert to be pressed by the molding compound against the article cavity of the tool can be, whereby a reproducible arrangement of the insert in the battery tray can be effected.
- the task is solved by a tool for producing a battery tray according to the first aspect of the invention, the tool forming an article cavity, the tool having a means for reproducibly positioning an insert part within the article cavity, the tool having a means for Introducing a molding compound into the article cavity.
- a “tool” is understood to mean a device for primary shaping, in particular for primary shaping of a battery shell according to the first aspect of the invention from a molten z liquid molding compound.
- a tool is preferably understood to mean an injection molding tool.
- a tool is preferably understood to mean a pressing tool.
- a tool is preferably understood to mean a plunge edge tool.
- An “article cavity” is understood to mean the hollow space that is formed by a tool for the area-wise shaping of the component to be produced with the tool, in particular a battery shell.
- a "means for introducing the molding compound into the article cavity” is understood to mean a device that is directly or indirectly assigned to the tool and is set up for this purpose is to introduce a molten mass into the mold.
- a means for introducing the molding compound into the article cavity is preferably understood to mean a device which is set up to fill the article cavity of the tool and/or the mold cavity of the tool with a molten molding compound, in particular in connection with an injection mold and/or an injection molding device.
- a means for introducing the molding composition into the article cavity is preferably understood to mean a device with which a molten molding composition can be introduced into a previously opened tool, in particular can be inserted, in particular in connection with a pressing tool and/or a pressing device.
- a “means for reproducible positioning” is understood to mean a holding means and/or a connecting means which is set up to position the insert part in a reproducible position within the tool and thus also within the designated battery shell.
- a means for reproducible positioning corresponds to a Means for reproducible statically determined positioning or reproducible statically overdetermined positioning
- a means for reproducible positioning has a stop, preferably a plurality of stops, and/or a guide area, preferably a plurality of guide areas, and/or a spring-loaded clamping means, preferably a plurality of clamping means , and/or consists of any combination of these different means.
- a tool for producing a battery shell according to the first aspect of the invention is proposed here. It goes without saying that the previously explained advantages of a battery shell according to the first aspect of the invention extend to a tool for producing a battery shell according to the first aspect of the invention.
- the tool expediently has at least one stop, preferably at least two stops, the stop being at least part of the means for reproducibly positioning the insert.
- a “stop” is understood to mean a boundary at least on one side, against which an insert part can be placed when it is intended to be inserted into the tool, and as a result of which the position of the insert part within the article cavity can be designed to be reproducible.
- the tool expediently has at least one guide area, preferably at least two guide areas, with one guide area being set up to guide the insert at least on one side, preferably to guide the insert on two sides of the insert on two sides of the insert that correspond to one another via the insert, with a guide area having at least one Part of the means for reproducible positioning of the insert is.
- a “guidance area” is understood to be an area in the boundary of the article cavity, which is set up to hold an insert part when it is intended to be introduced into the article cavity and/or when the battery shell is formed and/or when the shape the battery tray.
- a guide area can interact with respect to one or more surfaces of the insert and contribute to positioning and/or aligning the insert within the article cavity in a reproducible manner.
- a guide area can advantageously be used to ensure that the insert is automatically centered when it is introduced into the article cavity in a designated manner.
- a guide area is preferably designed to correspond to an indentation in the battery shell.
- the means for reproducibly positioning the insert is expediently spring-loaded.
- a spring-loaded clamping means should be considered here, which is set up to give the insert part at least a degree of static certainty and which preferably only allows a relative movement between the article cavity and insert part again after the insert part has been inserted into the article cavity when the battery shell is removed from the mold.
- the object is solved by a method for manufacturing a battery tray according to the first aspect of the invention, by means of an injection molding device or a pressing device with an article cavity forming tool according to the second aspect of the invention Means for reproducibly positioning an insert within the article cavity and a means for introducing a molding compound into the article cavity, the method for producing the battery shell comprising the following steps: a) placing the insert in the article cavity; b) introducing the molding compound into the article cavity; c ) Forming the battery tray ; d) Demoulding of the battery shell.
- the method proposed here facilitates the reproducible and/or load path-oriented positioning of a local reinforcement measure in the battery shell.
- the insert is a previously manufactured semi-finished product which, compared to the molding compound used here, preferably has greater strength and can therefore be used for local stiffening of the battery shell, while the molding compound introduced in the viscous state has a high degree of geometric flexibility allows for the geometry of the battery tray.
- the insert allows comparatively simple handling before and during insertion into the article cavity.
- the insert can advantageously interact with a means for reproducibly positioning the insert in the article cavity, which can also ensure that the insert has a substantially defined and reproducible relative position in relation to the molding compound of the battery shell when the battery shell is formed can take .
- an insert having a thermoplastic base material is heated before being placed in the article cavity, with the maximum temperature reached by the insert before being placed remaining below the melting point of the thermoplastic material, in particular at least 5° C. below the melting point of the thermoplastic material fs remains .
- the insert remains and on the other hand it can be achieved when using a molding compound having a thermoplastic that a materially bonded connection is created between the insert and the molding compound.
- a molding compound having a thermoplastic that a materially bonded connection is created between the insert and the molding compound.
- the molding compound overflows the heated insert part, it transfers a flow of heat to the surface of the insert part, which enables a material connection between the insert part and the molding compound.
- a traction battery in particular a traction battery for a motor vehicle, having a battery shell according to the first aspect of the invention and/or a battery shell manufactured with a tool according to the second aspect of the invention and/or a battery shell manufactured with a method according to the third aspect of the invention.
- a traction battery in particular a traction battery for a motor vehicle, having a battery shell according to the first aspect of the invention and/or a battery shell manufactured with a tool according to the second aspect of the invention and/or a battery shell manufactured with a method according to the third aspect of the invention.
- a “motor vehicle” is understood to mean a vehicle driven by a motor.
- a motor vehicle is preferably not tied to a rail or at least not permanently track-bound.
- the object is achieved by a motor vehicle having a battery tray according to the first aspect of the invention and/or a battery tray manufactured using a tool according to the second aspect of the invention and/or a battery tray manufactured using a method according to the third aspect of the invention .
- FIG. 1 schematically shows a section of a first embodiment of a battery shell in a perspective representation
- FIG. 2 schematically shows a section of a second embodiment of a battery shell in a perspective representation, the battery shell having a sectional representation
- FIG. 3 a schematic perspective view of a section of a third embodiment of a battery shell, the battery shell having a sectional view.
- ADJUSTED SHEET (RULE 91) ISA/EP
- the same reference characters designate the same components or Identical features, so that a description of a component given in relation to one figure also applies to the other figures, so that a repeated description is avoided.
- individual features that have been described in connection with one embodiment can also be used separately in other embodiments.
- the battery shell 100 is formed in a hybrid construction and has an insert part 120 in addition to the molding compound 140 .
- the battery shell 100 has an inner reinforcement 110 which is shaped in the form of a frame 111 .
- the insert 120 is accommodated in the battery shell 100 in the area of the inner reinforcement 110 .
- the battery shell 100 has a plurality of indentations 150 which can be used for quality control of the positioning of the insert 120 within the battery shell 100 .
- the wall thickness of the molding compound 140 is partially 0 mm. In other words, the insert part 120 is directly visible from the outside in areas of the indentations 150 .
- the insert 120 can have a chamfer.
- the insert part 120 preferably has a chamfer which is set up to interact with a flow front of the molding compound 140 when the battery shell 100 is formed, with a flow pressure of the Molding compound 140 advantageously interacts with the chamfer when molding battery shell 100 .
- the insert part can be pressed reproducibly against an article cavity (not shown) of a tool (not shown) by utilizing the flow pressure of the molding compound 140, whereby overall a reproducible arrangement of the insert part 120 in the battery shell 100 can be supported and/or or a reproducibility of an arrangement of the insert part 120 in the battery shell 100 can be improved.
- the section of an embodiment of a battery shell 100 in FIG. 2 shows an outer side 106 of the battery shell 100, the battery shell 100 being shown in section in such a way that the outer stiffening means 112 is also sectioned.
- the insert 120 is arranged in the area of the outer reinforcement 112 .
- the battery shell 100 has a plurality of indentations 150 through which the position of the insert part 120 can be checked.
- the indentation 150 is in the form of a groove.
- the indentation 150 On the front side of the insert part 120, the indentation 150 has the shape of a stop within the article cavity (not shown) of the tool (not shown) with which the battery shell 100 was produced.
- the section of an embodiment of a battery shell 100 in FIG. 3 shows an inside 108 of the battery shell, the battery shell 100 being shown in section such that the inner reinforcement 110 having two parallel frames 111 is also sectioned.
- Each frame 111 has a separate insert 120 .
- the battery tray 100 has indentations 150 in the area of the molding compound 140 in the areas corresponding to the respective insert parts 120 .
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Aviation & Aerospace Engineering (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Battery Mounting, Suspending (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021123003.9A DE102021123003A1 (de) | 2021-09-06 | 2021-09-06 | Batterieschale aus Kunststoff aufweisend ein Einlegeteil, Werkzeug sowie Verfahren zum Herstellen einer Batterieschale, Traktionsbatterie und Kraftfahrzeug |
| PCT/EP2022/072605 WO2023030860A1 (de) | 2021-09-06 | 2022-08-11 | Batterieschale aus kunststoff aufweisend ein einlegeteil, werkzeug sowie verfahren zum herstellen einer batterieschale, traktionsbatterie und kraftfahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4200932A1 true EP4200932A1 (de) | 2023-06-28 |
Family
ID=83006046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22757975.2A Pending EP4200932A1 (de) | 2021-09-06 | 2022-08-11 | Batterieschale aus kunststoff aufweisend ein einlegeteil, werkzeug sowie verfahren zum herstellen einer batterieschale, traktionsbatterie und kraftfahrzeug |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240372191A1 (de) |
| EP (1) | EP4200932A1 (de) |
| JP (1) | JP2024536990A (de) |
| CN (1) | CN117882224A (de) |
| DE (1) | DE102021123003A1 (de) |
| WO (1) | WO2023030860A1 (de) |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6050127B2 (ja) * | 1981-07-22 | 1985-11-07 | 宮川化成工業株式会社 | 蓄電池電槽の製造方法 |
| EP0936045A1 (de) * | 1998-02-12 | 1999-08-18 | National-Standard Company | Geformte Gehäuse mit elektromagnetischer Abschirmung |
| JP2006286357A (ja) * | 2005-03-31 | 2006-10-19 | Tdk Corp | バッテリ装置及びバッテリケース |
| JP4771765B2 (ja) * | 2005-07-26 | 2011-09-14 | 小島プレス工業株式会社 | 電池ケース |
| CN101352845A (zh) * | 2007-07-25 | 2009-01-28 | 深圳富泰宏精密工业有限公司 | 真空吸附定位装置 |
| JP4386131B2 (ja) | 2007-12-05 | 2009-12-16 | 三菱自動車工業株式会社 | 電気自動車 |
| JP5212086B2 (ja) * | 2008-12-24 | 2013-06-19 | 三菱自動車工業株式会社 | 電気自動車用バッテリケース |
| JP2012018797A (ja) * | 2010-07-07 | 2012-01-26 | Toray Ind Inc | ケースおよびその製造方法 |
| KR101315741B1 (ko) | 2012-03-23 | 2013-10-10 | 현대자동차주식회사 | 치수안정성이 우수한 전기자동차용 배터리 팩 케이스 어셈블리와 그 제조 방법 |
| DE102015203952A1 (de) * | 2014-12-19 | 2016-06-23 | Volkswagen Aktiengesellschaft | Batteriegehäuseteil für eine Traktionsbatterie eines Elektro- oder Hybridfahrzeugs und Batteriegehäuse |
| JP6479544B2 (ja) | 2015-04-10 | 2019-03-06 | Nok株式会社 | ガスケットの製造方法 |
| DE102016124318A1 (de) | 2016-12-14 | 2018-06-14 | Webasto SE | Formwerkzeug zum Anformen eines Formabschnitts an ein Werkstück |
| KR102381962B1 (ko) | 2018-11-29 | 2022-04-01 | 주식회사 엘지에너지솔루션 | 방열 부재를 구비한 전지팩 |
| EP3706193B1 (de) * | 2019-03-05 | 2023-06-14 | Ranger Compositi S.r.l. | Batterieschutzgehäuse und herstellungsverfahren für ein batterieschutzgehäuse |
| DE102019006234A1 (de) | 2019-09-04 | 2021-03-04 | Erwin Quarder Systemtechnik Gmbh | Gehäuse zur Aufnahme eines Akkupacks sowie Verfahren zur Herstellung eines derartigen Gehäuses |
-
2021
- 2021-09-06 DE DE102021123003.9A patent/DE102021123003A1/de active Pending
-
2022
- 2022-08-11 WO PCT/EP2022/072605 patent/WO2023030860A1/de not_active Ceased
- 2022-08-11 US US18/688,552 patent/US20240372191A1/en active Pending
- 2022-08-11 CN CN202280058619.0A patent/CN117882224A/zh active Pending
- 2022-08-11 EP EP22757975.2A patent/EP4200932A1/de active Pending
- 2022-08-11 JP JP2024514543A patent/JP2024536990A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023030860A1 (de) | 2023-03-09 |
| CN117882224A (zh) | 2024-04-12 |
| US20240372191A1 (en) | 2024-11-07 |
| DE102021123003A1 (de) | 2023-03-09 |
| JP2024536990A (ja) | 2024-10-10 |
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