CN117098642A - Method for connecting two components and battery module - Google Patents

Method for connecting two components and battery module Download PDF

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Publication number
CN117098642A
CN117098642A CN202280026277.4A CN202280026277A CN117098642A CN 117098642 A CN117098642 A CN 117098642A CN 202280026277 A CN202280026277 A CN 202280026277A CN 117098642 A CN117098642 A CN 117098642A
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CN
China
Prior art keywords
connection
components
cavity
potting compound
freedom
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
CN202280026277.4A
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Chinese (zh)
Inventor
M·特米尔
F·迪里塞梅尔
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.)
Audi AG
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Audi AG
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Filing date
Publication date
Application filed by Audi AG filed Critical Audi AG
Publication of CN117098642A publication Critical patent/CN117098642A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • H01M50/26—Assemblies sealed to each other in a non-detachable manner
    • 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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006—Joining parts moulded in separate cavities
    • B29C45/0062—Joined by injection moulding
    • 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
    • B29C45/14311—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 using means for bonding the coating to the articles
    • 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
    • B29C45/14467—Joining articles or parts of a single article
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/40—Applying molten plastics, e.g. hot melt
    • B29C65/42—Applying molten plastics, e.g. hot melt between pre-assembled parts
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/40—Applying molten plastics, e.g. hot melt
    • B29C65/42—Applying molten plastics, e.g. hot melt between pre-assembled parts
    • B29C65/425—Applying molten plastics, e.g. hot melt between pre-assembled parts characterised by the composition of the molten plastics applied between pre-assembled parts
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4865—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives
    • B29C65/487—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their shape, e.g. being fibres or being spherical
    • B29C65/488—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their shape, e.g. being fibres or being spherical being longitudinal, e.g. fibres
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/54—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive between pre-assembled parts
    • B29C65/542—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive between pre-assembled parts by injection
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1242—Tongue and groove joints comprising interlocking undercuts
    • B29C66/12423—Dovetailed interlocking undercuts
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
    • B29C66/3032—Particular design of joint configurations the joint involving an anchoring effect making use of protusions or cavities belonging to at least one of the parts to be joined
    • B29C66/30325—Particular design of joint configurations the joint involving an anchoring effect making use of protusions or cavities belonging to at least one of the parts to be joined making use of cavities belonging to at least one of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • 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
    • H01M50/227—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to a method for connecting two components (12, 18) and to a battery module (10) produced therefrom, wherein the components (12, 18) each have connecting elements (22, 24) that cooperate with one another, the connecting elements being joined to one another in order to provide a pre-connection, wherein a cavity (26) is formed between the connecting elements (22, 24) in the event of the pre-connection, the cavity providing (S10) at least one degree of freedom of movement and thereby an allowable range of the two components (12, 18) relative to one another in the direction of the at least one degree of freedom of movement. The method comprises the following steps: the components (12, 18) are arranged (S12) relative to one another, so that a pre-connection is provided, the components (12, 18) being aligned (S14) in the installed position using a tolerance range, the cavity (26) being filled (S16) with a curable potting compound, wherein at least one degree of freedom of movement is locked by the potting compound after the potting compound has been cured.

Description

Method for connecting two components and battery module
Technical Field
The invention relates to a method for connecting two components and to a battery module produced by means of said method.
Background
In particular in motor vehicles, the connection is usually produced by welding or screws. However, these manufacturing processes are generally only applicable to metallic materials. In particular, in the production of battery modules, there is a problem in that a plurality of connection parts are provided, which should also have heat insulation properties and electrical insulation properties.
A joint structure for a vehicle body is known from DE 10 2015 014 360 A1, which has at least two profile elements and a connecting joint formed from fiber-reinforced plastic, which connects the profile elements at the joint-side profile ends, wherein the connecting joint is formed from synthetic fiber-reinforced plastic in a reorientation and is additionally reinforced in at least one region by an insert.
A motor vehicle structural component and a method for producing the same are known from DE 10 2010 050 874 A1. The motor vehicle structural component comprises at least two semifinished components made of a fiber-plastic composite extrusion, which are connected by means of a cast joint element. The semifinished components have at least one hollow volume located inside and the node elements are cast in a form-fitting manner on at least one wall of the connecting end of each semifinished component to be connected. The semifinished component has no casting material on the outside of the node element.
A node structure for a vehicle body is known from DE 10 2015 014 357 A1, which has at least two profile elements and a connecting node formed from fiber-reinforced plastic, which connects the profile ends of the profile elements on the node side, wherein the connecting node has at least one molded functional element on the outside, which forms part of the outer contour.
Disclosure of Invention
The object of the present invention is to provide a method for connecting two components, in particular two motor vehicle components.
This object is achieved by the subject matter of the independent claims. Advantageous developments of the invention are disclosed in the dependent claims, the following description and the figures.
The invention provides a method for connecting two components, wherein the components each have a connecting element that cooperates with one another, the connecting elements being joined to one another in order to provide a pre-connection, wherein a cavity is formed between the connecting elements in the pre-connection, the cavity providing at least one degree of freedom of movement and thus an allowable range of movement of the two components relative to one another in the direction of the at least one degree of freedom of movement. The method comprises the following steps: the components are arranged relative to one another so as to provide a pre-connection, the components being aligned in the assembly position using a tolerance range and the cavity being filled with curable potting compound/caulking compound/casting compound, wherein at least one degree of freedom of movement is locked by the potting compound after the potting compound has been cured.
In other words, two components, in particular motor vehicle components, are provided, each having a connecting element that cooperates with one another. The connecting elements can be joined to one another in the arrangement to form a pre-connection, so that a positive connection is produced in at least one spatial direction, preferably in both spatial directions. In addition, in another spatial direction, a cavity or gap may be provided between the connecting elements, which cavity or gap enables the components to be moved relative to one another in the direction of at least one degree of freedom of movement. In other words, in the pre-connection, the two components still have at least one degree of freedom of movement by means of the cavity and can therefore be moved relative to one another. The cavity may thus be a tolerance range within which the components may also be aligned with each other.
After the alignment of the respective components in the assembly position which they should have relative to one another, the cavity can be filled with a curable potting compound, wherein after the potting compound has cured the cavity is locked and the connecting elements are thereby connected to one another in a form-locking and/or material-locking and/or force-locking manner. As potting compound, for example, an adhesive and/or a plastic can be used, which can be injected into the cavity.
The invention provides the advantage that a cost advantage can be achieved in that no additional components, for example screws, have to be used, and therefore fewer components have to be produced and assembled. Thus, a connection method that can be used for nonmetallic components can also be provided. The connecting elements can be fixed to each other significantly more rigidly, since a single piece can be formed by pouring with the pouring compound.
The invention also includes embodiments that yield additional advantages.
One embodiment proposes that the connecting elements cooperating with one another are designed to form a dovetail connection, undercut connection/undercut connection (Hinterschnittverbinding) or a mortise-tenon connection with one another. In particular, these connections may be provided as pre-connections. Dovetail connection means a connection similar to a tongue-and-groove (spandong) in which a tongue or a tenon having a substantially triangular or angular taper is inserted into the corresponding counterpart. However, in the pre-connection the connection is only a partial form-locking and a cavity may be provided on at least one side inside the connection, which allows the dovetail to move within the cooperating connection structure for alignment in the final assembly position. By undercut connection is meant a protruding, e.g. hooked, area of one of the connection elements that can be engaged into a cooperating hook structure in order to establish a pre-connection. Mortise and tenon joints refer to tenons that can be inserted into a mortise or slot, wherein the slot preferably has a larger volume than the tenon, thereby forming a cavity for later filling with a potting compound. By means of these connections, a preferred connection element can be provided.
Another embodiment provides that a flow channel for the potting compound is provided in at least one of the connecting elements. The flow channels may for example extend over the surface of the respective connecting element or be formed through the connecting element. Thus, the potting compound may be injected into the flow channel and introduced into the cavity through the flow channel. By this embodiment, a better accessibility of the cavity is obtained, whereby the method can be better performed.
Another embodiment provides that the component and the corresponding connecting element are made of plastic. Thus, the components and the connecting elements may be made of polyethylene or polypropylene, for example. In particular, the potting compound injected into the cavity can liquefy at high temperature and combine with the plastic (hot melt) so that the potting compound forms one piece with the plastic of the respective connection element. That is to say, a material-and/or form-locking connection can be produced by means of the potting compound by means of the connecting element formed as plastic. Alternatively, the component and/or the connecting element may be made of wood or metal, for example, and as a connection may establish a form-locking and/or force-locking connection.
Another embodiment provides that the potting compound has a plastic, in particular a fiber-reinforced plastic. In other words, thermoplastics, in particular thermoplastics with fiber reinforcement, such as polyethylene or polypropylene, can be used as potting compound. This has the advantage that a particularly strong structure can be achieved after hardening of the potting compound. Furthermore, if the connecting element is made of plastic, a fusion is achieved by the liquefied plastic of the potting compound, which results in a cohesive connection and thus in a particularly secure connection. Preferably, the connecting element and the potting compound are formed from the same plastic.
Another embodiment provides that at least one connecting element has a recess into which the potting compound enters when filling the cavity. In other words, the connecting element, preferably both connecting elements, can have a recess, in particular a recess which protrudes or is recessed into the respective connecting element. The recesses may be filled with a potting compound during the filling process, whereby the hardenable potting compound may wedge or become stuck in the recesses. That is, the potting compound may enter the side recess of the machine with the recess. By means of the additional wedging, the hardened potting compound can hold the connecting element in place in a fixed manner, in particular in the direction of the previously opened degree of freedom of movement.
It is preferably provided that the cavity is filled by a casting method, in particular an injection method. Thus, the thermoset plastic may be injected into the cavity by injection techniques to lock at least one degree of freedom of movement. Preferably, in the casting method, the casting compound is pre-liquefied, in particular thermally liquefied, and then filled into the cavity. By cooling, the potting compound can harden and thus firmly fix the connecting elements to one another.
Furthermore, it is preferably provided that the respective connecting element is provided as a one-piece component with the associated component. In other words, the connecting element and the component can be provided as a unitary component. This can be achieved, for example, by means of a molding process, for example, by means of extrusion, or the monolithic component can be produced by means of an injection process. The advantage obtained thereby is that additional method steps for mounting the connecting element on the respective component can be dispensed with and no additional connection has to be provided.
Another embodiment proposes to provide the components for producing the battery module, in particular as a base plate and lateral pressure plate of the battery module. In other words, the method for connecting the components can be used for producing a battery module, wherein lateral pressure plates or side walls are to be connected to the base plate in order to provide a housing of the battery module. The method is particularly suitable here, since the cell stack must be clamped by the lateral pressure plate and the clamping requires a tolerance range that can be provided by the cavity. The respective components of the battery module may then be connected to each other by injecting a potting compound.
Another aspect of the invention relates to a battery module having a cell stack and a housing, wherein the housing is manufactured by a method according to one of the foregoing embodiments. In particular, in the housing, the aforementioned base plate is connected to the lateral pressure plate, wherein the cell stack is clamped by the lateral pressure plate and the opposing pressure plate before the cell stack is firmly fixed inside the housing by the filling compound. The same advantages and variants are obtained here as in the method described.
The battery module according to the invention can preferably be arranged in a motor vehicle, wherein the motor vehicle is preferably designed as a motor vehicle, in particular as a passenger vehicle or a truck, or as a passenger car or a motorcycle.
The invention also comprises improvements of the battery module according to the invention, which have the features as already described in connection with the improvements of the method according to the invention. For this reason, corresponding improvements of the battery module according to the present invention will not be described here.
The invention also includes combinations of features of the described embodiments. Thus, the present invention also includes implementations having combinations of features of a plurality of the described embodiments, respectively, as long as the embodiments are not described as mutually exclusive.
Drawings
Embodiments of the present invention are described below. This is shown:
fig. 1 shows a schematic view of a battery module according to an exemplary embodiment;
fig. 2 shows a schematic diagram of the connection of two components according to an exemplary embodiment.
Detailed Description
The examples set forth below are preferred embodiments of the present invention. In the examples, the described individual features of the embodiments are each individually characteristic of the invention that can be considered independently of one another, which also individually modify the invention. Accordingly, the present disclosure is intended to include combinations of features of the embodiments other than those shown. Furthermore, the described embodiments may be supplemented by other of the already described features of the invention.
In the drawings, like reference numerals designate functionally identical elements, respectively.
A battery module 10 is shown in fig. 1, and a method for connecting members on the battery module will be described. The battery module 10 may have a base plate 12 and a cell stack 14, wherein the cell stack 14 is clamped between two press plates 16, 18. For this purpose, the first pressure plate 16 may already be connected to the base plate 12, wherein the second pressure plate 18 is intended to close the battery module 10 by pressing onto one side of the battery pack 14. In this example, the base plate 12 and the second platen 18 may be two members to be connected.
After the second pressure plate 18 has been pressed onto the cell stack 14, it is to be fixedly connected to the base plate 12 in the connection region 20. Since an allowable range should be provided for pressing the second press plate 18 against the cell stack 14, the base plate 12 and the second press plate 18 can have corresponding connecting elements 22, 24, which are illustrated in detail in fig. 2.
Fig. 2 shows a lateral pressure plate 18 and a base plate 12, which have cooperating connecting elements 22, 24, respectively, which are engaged with one another in order to provide a pre-connection. For example, as shown herein, the connection elements may include a dovetail connection as the pre-connection. The connecting elements 22, 24 are preferably connected to the respective components, in particular to the lateral pressure plate 18 and the base plate 12, in a material-locking manner, and are each provided as a single component.
The pre-connection structure that engages the respective connecting elements 22, 24 with each other may be designed such that a cavity 26 is formed between the connecting elements 22, 24, which cavity 26 enables at least one degree of freedom of movement, which in this example is directed out of the plane of the drawing or into the plane of the drawing. This allows a tolerance range that allows the lateral pressure plate 18 to be pressed onto the cell stack 14.
If the lateral pressure plate 18 is positioned into the assembly position using the tolerance range formed by the cavity 26, the cavity 26 can be filled with a potting compound by means of a potting method, in particular an injection method. The potting compound is preferably a fiber reinforced plastic, which may be made of the same material as the connection elements 22, 24. Preferably, the potting compound can be a thermoplastic, which is connected to the structure of the respective connecting element 22, 24 and thus forms a single piece. That is, the thermoplastic may melt the connecting elements 22, 24 and connect with these connecting elements.
After hardening of the potting compound, the degrees of freedom of movement previously provided by the cavity 26 can be locked, so that the connecting elements are connected in a form-locking and/or material-locking manner in all six degrees of freedom of movement.
For introducing the potting compound into the cavity 26, a flow channel 28 can be provided, which is provided on or in the connecting element or the component and through which the potting compound can be injected, in particular by means of injection.
In order to be able to further strengthen the hardened connection between the connecting elements 22, 24, in particular in the direction of the previously free degrees of freedom of movement, one or more recesses 30 can be provided on one or both connecting elements 22, 24. The recess 30 may be an inwardly directed aperture, i.e. a concave aperture, which is filled with an injection material when filling the cavity 26. After the potting compound hardens, these recesses 30 provide barbs or pins between the hardened potting compound and the connection elements 22, 24 in the direction of the previous free degree of freedom of movement.
The connection is shown at a corner between the two members 12, 18, but the connection may be used centrally at any point and is not limited to members that are perpendicular to each other.
In fig. 3, a schematic flow chart of a method for connecting two components 12, 18 is shown. In step S10, two components are provided, each having a connecting element 22, 24, for example a hook-shaped connecting element, which cooperate with one another, which are engaged with one another in order to provide a pre-connection, wherein a cavity 26 is formed between the connecting elements 22, 24 in the pre-connection, which cavity provides at least one degree of freedom of movement and thus an allowable range of the two components 12, 18 relative to one another in the direction of the at least one degree of freedom of movement.
In step S12, the members 12, 18 may be provided for achieving a pre-connection in which the members 12, 18 are engaged with each other by their connecting elements 22, 24. In the pre-connection, at least four degrees of freedom of movement can preferably be limited by form-locking.
In step S14, the components 12, 18 may be positioned into the installed position using the tolerance provided by the cavity 26.
Finally, in step S16, the cavity 26 may be filled with a curable potting compound, wherein at least one degree of freedom of movement is locked after the potting compound has been cured.
In summary, these examples demonstrate how the present invention can produce a connection with acceptable compensation.

Claims (10)

1. A method for connecting two components (12, 18),
-the components (12, 18) each have a connecting element (22, 24) cooperating with each other, which connecting elements are brought into engagement with each other in order to provide a pre-connection, wherein a cavity (26) is formed between the connecting elements (22, 24) in the pre-connection, said cavity providing (S10) at least one degree of freedom of movement and thereby providing an allowable range of the two components (12, 18) relative to each other in the direction of said at least one degree of freedom of movement, the method comprising the steps of:
-arranging (S12) the components (12, 18) relative to each other, thereby providing a pre-connection;
-positioning (S14) the component (12, 18) into the assembled position using the tolerance ranges;
-filling (S16) the cavity (26) with a hardenable potting compound, wherein the at least one degree of freedom of movement is locked by the potting compound after hardening of the potting compound.
2. The method of claim 1, wherein the cooperating connection elements (22, 24) are configured to form a dovetail connection, a undercut connection, or a mortise-tenon connection.
3. The method according to any of the preceding claims, wherein a flow channel (28) for the perfusion material is provided in at least one of the connecting elements (22, 24).
4. The method according to any of the preceding claims, wherein the component (12, 18) and the respective connecting element (22, 24) are made of plastic.
5. The method according to any of the preceding claims, wherein the potting compound has a plastic, in particular a fiber reinforced plastic.
6. The method according to any of the preceding claims, wherein at least one connecting element (22, 24) has a recess (30) into which the potting compound enters when filling the cavity (26).
7. The method according to any of the preceding claims, wherein the cavity (26) is filled by a casting method, in particular an injection method.
8. The method according to any of the preceding claims, wherein the respective connecting element (22, 24) is provided as a unitary component with the associated component (12, 18).
9. The method according to any of the preceding claims, wherein the components (12, 18) are provided for manufacturing a battery module (10), in particular as a bottom plate (12) and a lateral pressure plate (18) of the battery module (10).
10. A battery module (10) having a cell stack (14) and a housing (12, 16, 18), wherein the housing (12, 16, 18) is manufactured by the method according to any of the preceding claims.
CN202280026277.4A 2021-06-07 2022-05-12 Method for connecting two components and battery module Pending CN117098642A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102021114483.3A DE102021114483A1 (en) 2021-06-07 2021-06-07 Method of connecting two components and battery module
DE102021114483.3 2021-06-07
PCT/EP2022/062927 WO2022258299A1 (en) 2021-06-07 2022-05-12 Method for connecting two components, and battery module

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Family Cites Families (8)

* Cited by examiner, † Cited by third party
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DE102010050874B4 (en) 2010-11-09 2015-05-21 Daimler Ag Motor vehicle structural component made of semi-finished parts connected by means of a node element and manufacturing method
KR101500935B1 (en) * 2012-08-17 2015-03-11 주식회사 엘지화학 Battery Module Having Assembly Coupling Structure
CN104854354B (en) * 2012-11-13 2018-02-16 伍德韦尔丁公司 The method that part is connected with each other
DE102014113872A1 (en) * 2014-09-25 2016-03-31 Rehau Ag + Co Method for producing a frame
DE102015014360B4 (en) 2015-11-06 2020-10-08 Audi Ag Node structure for a vehicle body, method for the production thereof and vehicle body with at least one node structure
DE102015014357B4 (en) 2015-11-06 2019-12-19 Audi Ag Method for producing a node structure for a vehicle body
DE102017219928A1 (en) * 2017-11-09 2019-05-09 Lion Smart Gmbh Module housing for a stackable battery module, battery module and battery pack
CN117533110A (en) * 2019-11-29 2024-02-09 比亚迪股份有限公司 Battery pack and electric vehicle

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WO2022258299A1 (en) 2022-12-15

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