Holder for fixing a busbar, a housing comprising the holder and a method for fixing a busbar, as well as a battery and a motor vehicle

Abstract

Holder (4) for fixing a busbar (3) in a housing (2), comprising a holding area (5) designed to hold a busbar (3) and a contact area (6) designed to fix the holder (4) in the housing (2), wherein a joining surface (7) of the contact area (6) is designed to adhere to a corresponding joining surface (8) of the housing (2) and / or to a busbar receiving body (9) arranged in the housing (2), characterized in that it includes a bore (18) and / or an elongated hole (19) designed to form a joining connection with a corresponding structure (15).

Description

Technical FieldThe present invention relates to a holder for fixing a bus bar in a housing, a housing comprising the holder and a method of fixing a bus bar in the housing, and a battery and a motor vehicle.Prior ArtIn the field of batteries for electrically driven motor vehicles, it is known to interconnect the battery cells and battery modules electrically with one another by means of busbars, which are referred to as busbars in synonym terms of current. The busbars can be formed as rigid current guides from a highly conductive metal, more precisely from sheet metal tracks, for example from copper or aluminum. Alternatively, the busbars can be formed not only as sheet metal tracks, but also as a solid solid material line or as braid tapes and as strip tapes. Since highly conductive metals such as copper or aluminum are comparatively expensive and have a high weight, attempts are made to use them economically. For example, there are efforts to keep the cross section of the busbars used as small as possible. A criterion opposing the reduction of the cross section is the generation of heat in the busbars in comparison to an electrical load-bearing capacity, because the better the heat generated by the current flow can be dissipated, the smaller the cross section of the busbar can become. A cooler busbar can also have a lower electrical resistance, which is important from an efficiency point of view.For example, DE 10 2013 204 825 A1 discloses a busbar arrangement and a method for producing a busbar arrangement. DE 10 2007 003 937 A1 discloses a supporting device for power busbars. DE 86 09 413 U discloses a holder for current-carrying busbars. DE 10 2018 109 863 A1 discloses a multicomponent seal for sealing a rail, in particular a busbar for an on-board power supply system of a motor vehicle, with respect to a housing.To secure against accidental contact of the busbar and to shield the busbar from the environment, the busbars can be accommodated in a half-shell or both-sided housing or can be equipped with extrusion insulation. The busbar must be fixed in the housing in order to avoid noises during the travel of the motor vehicle and also vibrations which can cause damage to the busbar itself. In addition, protection against breakdown to other components (for example short circuits, etc.) is also intended to be provided. For example, the busbar is fixed in the housing by means of a screw connection, which is problematic with regard to sealing against liquids. In a motor vehicle, the housing must be tight with respect to liquids. In addition, a screw connection must be tight in addition to absorbing the screw torque and have a sufficient area for electromagnetic compatibility (EMC) contacting. Furthermore, there is a need to compensate for manufacturing tolerances between the busbars and the housing.SUMMARY OF THE INVENTIONProceeding from the known prior art, it is an object of the present invention to provide an improved holder and a housing comprising the holder for fixing a busbar and a corresponding production method.The object set out above is furthermore achieved by a holder for fixing a busbar in a housing having the features of claim 1. Advantageous refinements of the holder are evident from the dependent claims and from the present description and the figures.Accordingly, a holder for fixing a bus bar in a housing is proposed. The holder comprises a holding region which is configured to hold a busbar and a contact region which is configured to fix the holder in the housing. According to the invention, a joining surface of the contact region is configured to adhere to a corresponding joining surface of the housing or to a busbar receiving body arranged in the housing.In other words, the contact region can comprise a joining surface for an adhesive or adhesive connection, via which a joining connection to the housing, for example an inner side of a housing shell, or another structure of the housing or of a busbar receiving body, can then be produced. For example, the contact region can also be integrally formed on the correspondence joining surface, in particular can be foamed on."Designed for adhesion" can also mean that the holder in the contact region, in particular the joining surface, is formed from a self-adhesive plastic. As a result, no additional adhesive is required for forming an adhesive connection.This results in the advantage that a screw connection between the holder and the housing can be dispensed with, as a result of which a tightness of the housing is optionally improved. Furthermore, by omitting the screw connection for fixing the holder, a number of components can be reduced and a production method can thus be improved. Further, a weight of the bus bar assembly can be reduced by using the holder. In addition, by using an adhering mechanical connection instead of the screw connection, an adaptation to manufacturing tolerances can be improved.The holder, in particular the contact region, can have a structure comprising an elevation and / or a depression which is designed to form a joint connection with a corresponding structure corresponding thereto. In other words, the holder can have, in particular in the contact region on at least one wall side facing the inner wall of a housing and / or on a busbar side facing the busbar, a structure comprising at least one elevation and / or a depression which is designed to form a joint connection with a corresponding structure corresponding thereto comprising at least one corresponding depression and / or corresponding elevation.The joining connection can also be a positive joining connection, in particular a clamping connection. For example, the elevation can be designed as a nub and the depression can be designed as a depression and / or a bore which are designed to form the joining connection, in particular the clamping connection, with a nub and / or depression and / or bore corresponding thereto. This results in the advantage that stability of the adhesive connection with respect to a shear force can be improved.Additionally or alternatively, the depression and / or the correspondence depression can be designed as a trough-shaped depression or, in particular, as a depression. The elevation and / or the correspondence elevation can be designed to correspond to the trough-shaped depression and / or to the depression. This results in the advantage that stability of the adhesive connection with respect to a shear force can be improved.Additionally or alternatively, the holding region can have the mentioned structure.The holder can comprise a plastic and / or a foam or be formed therefrom. By the construction from plastic and / or foam material, in addition to good shapeability of the functional regions, improved vibration damping can also be achieved at the same time. Furthermore, in this way, a reliable electrical insulation behavior of the holder can also be achieved.The holder may be formed integrally.According to the invention, the holder, in particular the contact region, comprises a bore and / or an elongated hole which is designed to form the joint connection with a correspondence structure. Alternatively, the elongated hole can be formed as a depression, in particular as a long sink. The correspondence increase can be formed as a nub corresponding to the elongated hole, in particular as a long nub. This results in the advantage that, in addition to improving the stability against a shear force, a guide for positioning the holder in the busbar arrangement is provided.The depression and / or the elevation can have a variable wall thickness, in particular a stepped wall thickness, in a height direction which is orthogonal to a longitudinal direction and a transverse direction of the busbar orthogonal to the longitudinal direction, wherein the depression and / or the elevation optionally comprises a phase. In other words, a material thickness of the holder can vary along the height direction, in particular in the depression and / or at the elevation. The wall thickness may decrease with an increasing depth of the depression and / or an increasing height of the elevation, in particular along the height direction, for example by means of a phase in the depression and / or at the elevation. This results in the advantage that an elasticity of the holder is increased for an improved tolerance balance.The depression and / or the elevation can comprise a depression and / or the bore and / or the slot in the height direction, wherein the depression and / or the bore and / or the slot can have different diameters along the height direction, wherein optionally the diameter can increase or decrease with increasing depth along the height direction. In other words, the depression and / or the depression and / or the bore and / or the slot can comprise a plurality of depressions each having a different diameter, such that the wall thickness decreases with increasing depth of the depression, in particular along the height direction. A stepped wall thickness corresponding to the diameter is thus achieved. As a result, the wall thickness of an elevation lying opposite the depression on another side, in particular a spacer, also correspondingly decreases, as a result of which a stepped decrease in the wall thickness is achieved. This results in the advantage that the elevation can be pushed in telescopically, whereby an elasticity of the holder is further increased for an improved tolerance balance.The joining surface can be arranged in the depression and / or on the elevation and optionally comprise the depression and / or the bore and / or the elongated hole. In other words, the correspondence joining surface can be arranged on a corresponding correspondence elevation and / or correspondence depression, such that, for joining the holder, the respective elevation and / or depression can be joined into the corresponding correspondence depression and / or to the correspondence elevation for forming a joint connection. The joint connection can optionally be designed as a clamping connection. This has the advantage that stability against a shear force is further improved.The holder can comprise, in particular in the holding region, a spacer which is formed integrally with the holder or at least from a material different from the holder, in particular a more elastic material than a material of the holder, wherein the spacer can optionally have a contact shape and / or a cavity and can be configured to press against the busbar for fixing. In other words, the spacer can be designed as an elevation of the holder and optionally comprise at least one chamfer. The spacer, in particular the contact shape, can have a wedge shape or a pyramid shape. Optionally, the spacer and / or the contact shape can have a tip, in particular a rounded tip, by means of which it can press against a surface, in particular a depression in the surface of the busbar corresponding to the tip. The material can be a plastic, for example.As an alternative to a cavity, the spacer on the busbar side of the holder can have a depression on the wall side of the holder, which depression corresponds to the spacer, as a result of which a wall thickness of the holder is reduced. Optionally, the depression can have a phase, whereby an elasticity of the spacer is further increased.The holder can comprise at least two spacers, in particular in the holding region in the longitudinal direction of the busbar, wherein the spacers are separated in the longitudinal direction by means of a gap and optionally the gap is filled with a heat dissipation medium. In other words, the spacer can have the gap or an interruption along the longitudinal direction, which is optionally filled with the heat-conducting medium. This results in the advantage that a heat dissipation from the busbar in the busbar arrangement is further improved.The holder can have an inclination in the height direction with respect to a plane along the transverse direction and / or the holding region can have a thinner wall thickness than the contact region, in particular in the transverse direction. In other words, in the plane with respect to the transverse direction, the holder can have a waveform which optionally comprises the inclination or an offset. The inclination can comprise an inclination and / or an offset of the holder in particular in the height direction. This results in the advantage that busbars of different sizes can be fixed by the holder.The object is furthermore achieved by a housing having the features of claim 9. Advantageous refinements emerge from the dependent claims, the description and the figures.Accordingly, a housing for a busbar is proposed, which comprises the above-mentioned holder for fixing the busbar. The holder comprises a holding region and a contact region, wherein the holding region is configured to hold the at least one busbar and the contact region is configured to fix the holder in the housing.According to the invention, the contact region of the holder has a joining surface and the holder is joined on the joining surface to a corresponding mating surface of the housing and / or on a busbar receiving body arranged in the housing for fixing the busbar and / or adheres to the corresponding mating surface of the housing by means of the joining surface.In other words, the contact region of the holder can have a joining surface and the holder can be joined and / or bonded on the joining surface to the corresponding correspondence joining surface of the housing, for example on the inner side of the housing and / or on a busbar receiving body arranged in the housing, for fixing the busbar.Additionally or alternatively, the holder can be integrally formed, in particular foamed, on the correspondence joining surface of the inner side and / or of the busbar receiving body and optionally on the busbar. Optionally, an electrical insulation can be provided between the busbar and the inner wall of the housing, in particular by the holder.The holder can be arranged and designed within the scope of a degassing concept such that a targeted conduction of the gases is achieved in a propagation case of the battery, that is to say in the event of a thermal runaway of one or more battery cells. For this purpose, the holder can be designed to form a gas-tight joint connection with the correspondence joining surface, in particular a correspondence structure of the correspondence joining surface, and / or to surround the respective busbar at least partially in a gas-tight manner. Furthermore, gas-conducting structures can also be incorporated.The busbars can be designed in the form of sheet metal tracks, preferably copper sheet metal tracks and / or aluminum sheet metal tracks. The housing can be formed half-shelled or on both sides. In the variant on both sides, the housing has a lower shell and an upper shell, which are joined to one another to form the housing and are optionally connected to one another by means of a connecting element. By connecting the upper shell and lower shell, the holder can be pressed against the inner side and / or the busbar receiving body and / or the busbar by means of a mechanical tension. The connecting element can be a welded, soldered, riveted, screwed and / or an adhesive connection.The holder can be designed as a hold-down device. The holding region of the holder and / or of the busbar receiving body can comprise, for example, a receptacle which is formed smaller by a predefined amount than a width of the respective received busbar. The holding region of the busbar receiving body can be bounded by a web, which can optionally comprise the correspondence joining surface. As a result, a clamping effect on the busbar for fixing can be achieved. The holder and / or the busbar receiving body can surround the respective busbar in the circumferential direction by its cross section orthogonally to its longitudinal extent at least on three sides, in particular completely.The "surrounding" of the busbars by the holder and / or by the busbar receiving body described herein can be an adhering surrounding in which at least one plastic of the holder and / or of the busbar receiving body adheres permanently by means of the joining surface to the correspondence joining surface and optionally to an outer surface of the respective busbar in the holding region, in particular by means of the receptacle and / or by means of a spacer.The holder and / or the busbar receiving body can comprise at least one elastic plastic, in particular made of an elastomer and / or a thermoplastic elastomer, or be formed therefrom. The holder may be formed integrally.Additionally or alternatively, the holder can be formed from at least one foam body, in particular comprising a plastic foam, for example a polyurethane foam. The foam body can optionally have a density of 0.5 to 1.5 kg / dm 3 in particular of 0.8 to 1.2 kg / dm 3. The plastic of the holder, in particular the foam body, can have a Shore A hardness of 60 to 100, in particular a Shore A hardness of 80 to 90, and / or a flammability requirement of UL94 V0 or UL94 HB. In this way, the holder can be designed to be elastic and thus optionally provide vibration insulation. The holder can be molded, in particular injection-molded and / or foamed, at least on the inner side of the housing and / or the foam body and optionally the busbar.The term "integrally formed" or "molding" is defined here as adhesion of the adhesive and / or reactive plastic material, which occurs during a flowable state during a molding, for example an injection molding or casting, of the holder, to the surface, in particular the correspondence joining surface, of an adhesion partner, for example to the surface of the respective busbar and / or the inner side of the housing and / or of the busbar receiving body.The term "foaming" or "foamed" is defined here as adhesion of the reactive foam material to the surface of an adhesion partner, in particular the correspondence joining surface, which occurs during a foaming process of a plastic foam. Here, correspondingly, during a foaming process for forming the holder in the form of a foam body, the foam can be permanently adhesively connected to the inner side of the housing and / or the busbar receiving body and optionally the respective busbar on account of the adhesive effect of the reactive foam during foaming. In this case, no adhesive bonding step takes place with an additional adhesive. Thus, no additional adhesive layer can be located between the foam material of the foam body and the respective correspondence joining surface. Rather, the foam body, in particular the holder, can optionally adhere directly to the respective correspondence joining surface with the joining surface. "foaming" can, such as "injection molding" or "injection molding", thus represent a configuration of "forming".The joining surface and / or the corresponding joining surface may have been subjected beforehand to a pretreatment, for example a cleaning or roughening. An adhesion promoter or an adhesion-promoting layer, in particular a primer, can be applied to the joining surface and / or the correspondence joining surface.This results in the advantage that a screw connection between the holder and the housing can be dispensed with, as a result of which a tightness of the housing is optionally improved. Furthermore, by omitting the screw connection for fixing the holder, a number of components can be reduced and a production method can be improved. Further, a weight of the bus bar assembly can be reduced by using fewer components. In addition, by using an adhering mechanical connection instead of the screw connection, an adaptation to manufacturing tolerances can be improved.The holder can have, in particular in the contact region, a structure comprising an elevation and / or a depression which can form a joint connection with a corresponding structure which is arranged on the inner side of the housing and / or on the busbar receiving body and corresponds to the structure of the holder and comprises a corresponding corresponding elevation and / or corresponding depression. In other words, the structure of the holder may be joined into the corresponding structure on the inside of the housing and / or into the corresponding structure of the bus bar accommodating body. The elevation and / or depression can be configured to form a joining connection, in particular a positively locking joining connection, with the correspondence depression and / or correspondence elevation. For example, the joining connection can be a clamping connection. The structure and / or the correspondence structure can therefore be configured to form the joint connection. For example, the elevation and / or the correspondence elevation may be formed as a nub and the depression and / or the correspondence depression may be formed as a depression which can accommodate the nub. This results in the advantage that a shear force can be counteracted and thus a stability of the busbar arrangement is improved.Additionally or alternatively, the holding portion may have the structure, and optionally, a surface of the bus bar may have the correspondence structure.The holder and optionally the elevation and / or the depression can comprise a bore and / or an elongated hole, in particular in the contact region, which can form the joint connection with the correspondence structure, in particular with the correspondence elevation corresponding thereto. Alternatively, the holder can comprise a long trough or the depression instead of an elongated hole. The structure of the holder can have a depression and / or a bore which can form a joint connection with a corresponding nub, in particular a long nub, of the correspondence structure. In addition, the depression and / or the bore can optionally provide, together with the nub of the correspondence structure, a guide during the positioning of the holder. This results in the advantage that a shear force can be counteracted and a positioning aid can be provided.The depression and / or the elevation can have a variable wall thickness, in particular a stepped wall thickness, in a height direction which is orthogonal to a longitudinal direction and a transverse direction of the busbar orthogonal to the longitudinal direction, wherein the depression and / or the elevation optionally comprises a phase. This results in the advantage that an elasticity of the holder can be increased for improved tolerance compensation.Additionally or alternatively, the depression and / or the elevation in the height direction can comprise a depression and / or the bore and / or the slot, wherein the depression and / or the bore and / or the slot have different diameters along the height direction, wherein optionally the diameter increases or decreases with increasing depth along the height direction. This makes it possible to achieve a stepped wall thickness which increases or decreases along the height direction. This results in the advantage that an elasticity of the holder can be further increased for improved tolerance compensation. The depression and / or the bore and / or the elongated hole of the structure can receive a corresponding nub of the corresponding structure for a positive-locking joining connection. This has the advantage that stability against a shear force can be further improved.The correspondence joining surface can be arranged in the correspondence depression and / or the correspondence elevation and can each optionally comprise the depression and / or the bore and / or the elongated hole.Additionally or alternatively, the joining surface of the holder can be arranged in the depression and / or on the elevation and in each case optionally comprise the depression and / or the bore and / or the slot.This has the advantage that stability against a shear force can be further improved.The holder can comprise a spacer in the holding region, which is formed from one piece with the holder or at least from a material different from the holder, in particular a more elastic material than a material of the holder, wherein the spacer optionally has a contact shape and / or a cavity and is configured to press the busbar against the inner side of the housing and / or the busbar receiving body. In other words, the spacer can be formed from the same plastic as the holder, wherein the spacer can be formed as a raised portion. The contact shape of the spacer can be designed to adapt to the busbar in particular in a form-fitting manner and / or to hold the busbar under a mechanical tension.For example, the spacer can be designed, in particular by means of the contact shape, to adapt to the busbar on the one hand and to keep the busbar under a mechanical stress under temperature and dynamics on the other hand.For example, the contact shape of the spacer may be a wedge shape or a pyramid shape. The material can be a plastic, for example. This results in the advantage that an elasticity of the holder is improved when the busbar is fixed.Additionally or alternatively, the spacer can have a rounded tip and / or a phase, wherein the spacer presses against the busbar, in particular with the tip on a surface, in particular in a depression on the surface of the busbar corresponding to the tip. This results in the advantage that an elasticity of the holder is further improved.Alternatively to the cavity, the holder can have a depression in the holding region corresponding thereto on an opposite wall side of the holder in relation to the spacer on a busbar side of the holder, such that a wall thickness in the region of the spacer and / or the elevation is reduced. The holder can thus also have the depression in the holding region. This results in the advantage that an elasticity of the holder is further improved.Additionally or alternatively, the holder can comprise at least two spacers, in particular in the holding region in the longitudinal direction of the busbar, wherein the spacers are separated in the longitudinal direction by means of a gap and optionally the gap is filled with a heat dissipation medium. In other words, the spacer may have the gap in the longitudinal direction, which is optionally filled with the heat dissipation medium. This results in the advantage that, in addition to the elasticity, thermal conductivity is improved.The holder can have an inclination in the height direction with respect to a plane along the transverse direction, and / or the holder can optionally have a thinner wall thickness in the holding region than in the contact region. In other words, the holder can have a wave shape in the plane along the transverse direction, which in particular comprises the slope. In contrast to the elevation and / or the depression, the slope can be formed, for example, as an inclination of a body of the holder and / or as an offset of the body, in particular in the height direction. This results in the advantage that the holder can be adapted to busbars of different sizes.The object set forth above is furthermore achieved by a battery or a battery system comprising said busbar arrangement and / or said holder. The battery or the battery system can be designed as a primary drive battery of a motor vehicle, which can deliver (high-voltage) power for an electric motor of the motor vehicle, in particular as a primary drive. The battery system may be as an electrical interconnect of a plurality of battery packs each including a plurality of battery cells.The object set forth above is furthermore achieved by a motor vehicle comprising said battery or said battery system. The motor vehicle can preferably be designed as a motor vehicle, in particular as a passenger car or truck, or as a passenger bus or motorcycle. The motor vehicle may be electrically powered (EV) or, in particular, a hybrid electric vehicle (HEV, PHEV), wherein the components provided for this purpose in the motor vehicle may each be an electrical load of the battery or of the battery system.The object set out above is furthermore achieved by a method for fixing a busbar having the features of claim 14 or claim 15. Advantageous refinements of the method are evident from the dependent claims and from the present description and the figures.Accordingly, a method for fixing at least one busbar by means of the above-mentioned holder is proposed, comprising the steps:molding, in particular foaming, the holder to a correspondence joining surface of the housing and / or to a correspondence structure on an inner side of the housing and / or to a busbar receiving body in the housing;arranging the at least one busbar in the housing and fixing by means of the holder.Accordingly, a method for fixing at least one busbar by means of the above-mentioned holder is also proposed, comprising the steps:arranging the at least one busbar in the housing and / or on a busbar receiving body arranged in the housing;applying an adhesive to a joining surface of the holder and / or to a corresponding joining surface of the housing and / or to a busbar receiving body;joining the joining surface of the holder to the corresponding joining surface;fixing the at least one busbar in the housing by means of the holder.In other words, the plastic may be a foam. The busbar arrangement can comprise the housing and at least one busbar and optionally the holder. The housing may be the above-mentioned housing and / or the holder may be the above-mentioned holder. The holder, in particular the foam, can be molded, in particular foamed, onto a corresponding structure on the inner side of the housing and / or on the busbar receiving body and optionally onto a surface of the busbar. As a result, the structure of the holder corresponding to the correspondence structure can be formed by means of the molding of the plastic, in particular foaming, of the foam onto the correspondence structure.The holder can then be joined to the correspondence joining surface by the joining of the upper shell and lower shell at the joining surface and can optionally be pressed against the correspondence joining surface and / or against the inner side of the housing and / or the busbar receiving body and optionally the busbar for fixing the busbar by a mechanical stress provided by the upper and lower shells.This results in the advantage that a screw connection for fixing the holder in the housing can be dispensed with, wherein stability against a shear force against the holder is additionally improved. In addition, an adaptation of tolerances by the elasticity of the holder is improved.Optionally, after the forming, in particular foaming, of the holder, a spacer can be arranged on the holder on a busbar side of the holder facing the busbar.In other words, the holder can be pressed against the inner side of the housing and / or against the busbar receiving body by a mechanical stress arising during the joining of the upper shell and lower shell against the correspondence joining surface and optionally against a surface of the busbar for fixing the busbar. The housing may be the above-mentioned housing and / or the holder may be the above-mentioned holder. The busbar can optionally be arranged in the housing with an electrical insulation against the inner side of the housing, which insulation is additionally or alternatively provided by the holder comprising at least one plastic. Optionally, during the joining of the holder, the holding region of the holder can be joined to the busbar. Optionally, the spacer can be joined against a depression on the surface of the busbar. This results in the advantage that a screw connection for fixing the holder in the housing can be dispensed with, wherein an adaptation of manufacturing tolerances by the elasticity of the holder and the joint connection is additionally improved.The invention also encompasses implementations comprising a combination of the features of a plurality of the described embodiments. Optionally, the described busbar arrangement and / or the holder can have structural features from the method and vice versa.Brief Description of the FiguresPreferred further embodiments of the invention are explained in more detail by the following description of the figures. The following are shown: FIG. 1 schematically shows a plan view of the busbar arrangement from above; FIG. 2 schematically shows a section of the busbar arrangement; FIG. 3 schematically shows a perspective view of a first embodiment of the holder; FIG. 4 schematically shows a plan view of the first embodiment of the holder; FIG. 5 schematically shows a perspective view of a second embodiment of the holder; FIG. 6 schematically shows a plan view of the second embodiment of the holder; FIG. 7 shows a schematic illustration of a first embodiment of the production method of the busbar arrangement; and FIG. 8 shows a schematic illustration of a second embodiment of the production method of the busbar arrangement.DETAILED DESCRIPTION OF PREFERRED EMBODIMENTSPreferred exemplary embodiments are described below with reference to the figures. Identical, similar or identically acting elements are provided with identical reference symbols in the different figures, and a repeated description of these elements is partly omitted in order to avoid redundancies.FIG. 1 schematically shows a plan view of the busbar arrangement 1 in a battery which comprises the housing 2 in which at least one busbar 3 is arranged in the longitudinal direction x. The busbar 3 can be formed as a metallic cuboid along the longitudinal direction x and transverse direction y, which forms the current-carrying element or in which at least one current-carrying element for electrically connecting the battery cells of the battery, such as a cable, is arranged. The housing 2 comprises a lower shell 11 and an upper shell (not shown), which are joined together to close the housing 2 and are held together by means of the screw connection 28. In order to fix the busbar 3 in the housing 2, in particular in the lower shell 11, a holder 4 is inserted into the housing 2, in particular into the lower shell 11 or into the upper shell (not shown).The holder 4 can comprise or be formed from at least one plastic, in particular an elastomer, and comprise a contact region 6 for fixing the holder 4 in the housing 2 and a holding region 5 for holding the busbar 3. The contact region 6 can comprise, for example, a joining surface 7, which can be configured in particular as an adhesion surface for an adhesive or adhesive connection. In particular, the joining surface 7 can comprise a self-adhesive plastic.In the contact region 6, the holder 4 is joined, in particular bonded, on the joining surface 7 to a corresponding mating joining surface 8 on the inner side 27 of the housing 2, in particular the lower shell 11, and / or to a corresponding mating joining surface 8 of a busbar receiving body (not shown) arranged in the housing 2.The correspondence joining surface 8 may also be formed as a correspondence adhesion surface. The joining surface 7 and / or the corresponding joining surface 8 and / or a surface of the bus bar 3 may have been subjected to a pretreatment, such as cleaning or roughening, in advance. Optionally, an adhesion promoter or an adhesion-promoting layer, in particular a primer, can be applied.Alternatively, the holder 4 can be molded or foamed onto the correspondence joining surface 8 and optionally onto a busbar 3 arranged in the housing 2. In this case, the holder 4 is permanently adhesively connected to the inner side 27 of the housing 2 and / or to the busbar receiving body (not illustrated) and optionally to the busbar 3 on the joining surface 7 and on the correspondence joining surface 8.The contact portion 6 optionally has a structure (not shown) that improves strength against a shear force by a corresponding correspondence structure (not shown).The holding region 5 of the holder 4 is configured to hold at least one busbar 3, for example by pressing by means of a spacer (not shown) against the inner side 27 and / or the respective busbar receiving body (not shown).Additionally or alternatively, the holding region 5 of the holder 4 can be designed to accommodate at least a part of the busbar 3 or at least a part of at least one busbar 3 in each case. In addition, the holder 4, in particular the holding region 5, can be integrally formed on the busbar 3, in particular injection-molded and / or foamed on. In addition, the holder 4 can be molded, in particular injection-molded and / or foamed, onto the inner side 27 of the housing 2, in particular an upper shell or lower shell, and / or onto the busbar receiving body (not shown).In addition, the holding region 5 can surround the busbar 3 in a circumferential direction at least on three sides by its cross section along the longitudinal direction x. Here, "surrounded" can mean an "adhesively surrounded", in which the material of the holder 4, in particular the elastomer, permanently adheres to an outer surface of the busbar 3.In addition, the holding region 5 can completely surround the busbar 3 in the circumferential direction by its cross section along the longitudinal direction x, wherein a surface facing away from the busbar 3 can be used as an optional joining surface 7.By using the adhesive bonding or molding of the holder 4 onto the inner side 27 of the housing 2 and / or of the busbar receiving body for fixing the holder 4, it is possible to dispense with a separate screw connection 28, by means of which the holder 4 could be fixed in the housing 2. By omitting a separate screw connection for fixing the holder 4 in the housing 2, a tightness of the housing 2 can be improved. In addition, an elasticity of the holder for compensating manufacturing tolerances can be improved.FIG. 2 schematically shows a section of the busbar arrangement 3 along the longitudinal direction x. The housing 2 comprises an upper shell 10 and a lower shell 11, which are connected to one another by means of the screw connection 28 and form the housing 2. The busbar receiving body 9 is arranged on the lower shell 11 in the housing 2, and the holder 4 is arranged on the upper shell 10; the busbar 3 is arranged on the busbar receiving body 9, which has a holding region 5 for receiving at least one busbar 3. In this case, at least one busbar 3 can be arranged in each case in the holding region 5 of the busbar receiving body. In addition, the busbar receiving body 9 can be adhesively bonded to the inner side 27 of the housing 2, in particular of the lower shell 11 or upper shell 10. Additionally or alternatively, the busbar receiving body can be fixed in the housing 2 by means of the screw connection 28 between the upper shell 10 and lower shell 11.The holding region 5 of the busbar receiving body 9 can be formed analogously to the holding region 5 of the holder 4. In addition, the busbar receiving body 9, in particular the holding region 5, comprises a web 29 for holding the busbar 3. In this case, the busbar 3 is arranged in the holding region 5 in the circumferential direction of the cross section thereof along the longitudinal direction x on in each case two opposite sides on in each case one web 29 for fixing.On an inner side 27 of the housing 2 opposite the busbar receiving body 9, the holder 4 is arranged. For example, the holder 4 is glued or integrally formed on the inner side 27. The holder 4 presses by means of the contact region 6 against the busbar receiving body 9, in particular the web 29, while the holding region 5 presses by means of the spacer 23 against a surface of the busbar 3.Optionally, the contact region 6 of the holder 4 can have a thicker wall thickness 30 than the holding region 5 or the contact region 6 can have a thinner wall thickness 30 than the holding region 5.The holder 4 comprises, in particular in the contact region 6, a structure 12 which is formed at least from an elevation 13 and / or a depression 14 which is configured to be joined to a correspondence structure 15 of the busbar receiving body 9 and / or alternatively to the inner side 27 of the housing. The correspondence structure 15 is also formed of at least one correspondence ridge 16 and / or a correspondence groove (not shown). For example, the correspondence elevation 16 can be formed as a nub, which forms a joining connection, in particular a clamping connection, with the depression 14 of the holder 4, which can be formed as a depression. The correspondence enhancer 16 can therefore be inserted into the recess 14. This further improves stability against a shear force.The holder 4 has a spacer 23 in the holding region 5, which spacer is designed for holding the busbar 3. The spacer 23 is configured to be placed on a surface of the busbar 3 and press it against it for fixing the busbar 3. In this case, the spacers are shown in FIG. 2 in a starting position in which they are not pressed against the respective busbar 3. Thus, for example, tips of the spacers 23 are situated below an upper side of the busbars 3. The spacer 23 can have a smaller cross section on a side facing away from the holder 4 than on a side facing the holder 4. For example, the spacer 23 can be wedge-shaped or pyramid-shaped, which increases an elasticity.Additionally or alternatively, the spacer 23 can have a cavity 25 which further increases an elasticity. In addition, the spacer 23 can be formed from an elastomer which is optionally different from the elastomer of the holder 4, in particular softer.Alternatively, the holder 4 can have, on a side opposite the spacer 23, in particular along the height direction z, a depression 14 opposite the spacer 23, which can be formed analogously to the shape of the spacer 23. As a result, elasticity of the spacer 23 can be improved.The holder 4 can be pressed against the busbar 3 by means of a mechanical tension of the housing 2. For example, the pressure for the holder 4 for fixing the busbar 3 can be provided by the screw connection 28 which mechanically connects the upper shell 10 to the lower shell 11.For this purpose, the holder 4 can be designed according to a first and a second embodiment, which are shown in more detail in the following figures.FIG. 3 schematically shows a perspective view of the first embodiment of the holder 4. the holder 4 has the holding region 5 and the contact region 6 on a wall side 31 and a busbar side 32. The holding region 5 and / or the contact region 6 have, on the wall side 31 and / or the busbar side 32, a structure 12 comprising at least one elevation 14 and / or a depression 14, wherein the structure 12 on the busbar side 32 corresponds to the correspondence structure 15 for forming a joint connection.The holding region 5 of the busbar receiving body 9 can be configured to receive at least one busbar 3. The holding region 5 has, on the wall side 31, a depression 14 opposite the spacer 23 on the busbar side 32, which depression can optionally be formed analogously to the shape of the opposite elevation 13. This increases an elasticity of the elevation 13 on the busbar side 32 of the holder 4, which is formed in particular in one piece with the holder 4. The spacer 23 is configured to press a surface of a busbar 3, in particular by means of the tip 33, in order thus to fix the busbar 3 in the busbar receiving body 9. The spacer 23 is, for example, wedge-shaped or pyramidal.Additionally or alternatively, the spacer 23 and / or the elevation 13 and / or the depression 14 have a phase 22. As a result, an elasticity of the spacer 22 can be further improved.In the contact region 6, the holder 4 has the joining surface 7 and optionally the depression 14 on the wall side 31 and / or the busbar side 32. On the joining surface 7, the holder 4 is joined on the wall side 31 to the inner wall 27 of the housing 2, wherein the joining surface 7 is optionally configured as an adhesion surface for an adhesive bond or an adhesive bond. The depression 14 can optionally have a depression and / or a bore. In particular, the bore can be arranged in the depression. Compared to the depression 14, the holder 4 can have an elevation 13 in the contact region 6, in particular on the busbar side 32. The elevation 13 can be formed, for example, in the shape of a cylinder or a cuboid. In addition, the elevation 13 can be designed as a nub. The protrusion 13 corresponds to the corresponding recess 17 of the bus bar accommodating body 9, so that the protrusion 13 can be joined into the corresponding recess 17 for forming a joint connection, in particular a clamping connection. The corresponding recess 17 may be optionally formed as a valley. The ridge 13 and the corresponding recess 17 respectively include the joint surface 7 and the corresponding joint surface 8.In addition, the ridge 13 may include a valley and the corresponding recess 17 may include a corresponding nub, so that the ridge 13 locks in the corresponding recess 17.FIG. 4 schematically shows a plan view of the busbar side 32 of the first embodiment of the holder 4, which has the structure 12. The holding region 5 can be designed to press on at least one busbar 3, optionally by means of a spacer 23, for fixing the busbar 3. The spacer 23 in the holding portion 5 is formed integrally with the holder 4. The spacer 23 also has a phase 22, so that it is wedge-shaped or pyramidal in shape, which improves elasticity. Optionally, the spacer has a tip 33. When the holder 4 is arranged on the busbar receiving body 9, the tip 33 of the spacer 23 presses in the height direction z against a surface, in particular against a depression arranged on the surface, of the busbar 3, such that said busbar is fixed in the busbar receiving body 9.The contact region 6 has the joining surface 7 on the busbar side 32. Additionally or alternatively, the contact region 6 has the elevation 13, which additionally comprises the joining surface 7. The elevation 13 additionally has the depression 20, which is alternatively designed as a bore. As a result, elasticity can be improved. The protrusion 13 may be inserted into a corresponding recess 17 of the busbar accommodating body 9, and / or the depression 20 may be joined to a corresponding protrusion 16 of the busbar accommodating body 9. This makes it possible to better counteract a shear force.FIG. 5 schematically shows a perspective view of a second embodiment of the holder 4.In contrast to the first embodiment, the holder 4 according to the second embodiment has a structure 12 comprising an elongated hole 19 and / or a depression 14, in particular in the contact region, which optionally comprises a depression 20 and a bore 18 each having different diameters.The contact region 6 has an elongated hole 19 which is designed to be joined to a corresponding projection 16 on the current-receiving body 9 and / or the inner side 27 of the housing. The correspondence elevation 16 can be, for example, a corresponding nub or the web 29 of the busbar receiving body 9, optionally comprising the correspondence elevation 16. As a result, a guide can be provided during the positioning of the holder 4. Alternatively, the elongated hole 19 can also be formed as an elongated depression.In addition, the contact region 6 has, in particular on the wall side 31, a depression 14 which comprises the joining surface 7. In addition, the depression 14 and / or the joining surface 7 has at least one depression 20 with optionally different, in particular decreasing, diameters 21.In addition, the depression 20 can comprise a bore 18. In addition, the holder 4 can have a raised portion 13 in the contact region opposite the depression 14, in particular on the busbar side 3. When the elevation 13 is pressed against the corresponding depression 17 onto the busbar receiving body 9, the latter can thus be pressed in stepwise, for example telescopically. This improves an elasticity for tolerance compensation. Furthermore, when joining the depression 14 and / or the elevation 13 and / or the depression 20 and / or the bore 18 to the corresponding correspondence elevation 16 and / or correspondence depression 17, a shear force can be better counteracted. In addition, the holder 4 can be latched to the busbar receiving body 9 by means of the depression 20 and / or the bore 18.In contrast to the first embodiment, the second embodiment has in the holding region 5 along the longitudinal direction x at least two spacers 23, which are separated from one another by the gap 23. The spacers 23 can be formed from a different elastomer than the holder 4. for example, the spacer 23 can be formed from a more elastic elastomer and / or an elastomer with a better thermal conductivity than the holder 4. The spacers 23 are designed to press the tip 33 against the busbar 3 and thus to fix it in the holding region 5 between the webs 29 of the busbar receiving body 9. The spacer 23 can be wedge-shaped or pyramid-shaped, for example, wherein the tip 33 can optionally be rounded.Additionally or alternatively, the respective spacer 23 can comprise a cavity 25 which further increases an elasticity.In addition, the holder 4 can have a bevel 26, so that the holder 4 can rest on busbars 3 of different sizes on the busbar side 32. The slope 26 may be formed as an inclination of the holder 4 and optionally have a wave shape.In addition, the holding region 5 can be designed to press, by means of at least one spacer 23, against a respective busbar 23 in the holding region 5 for fixing the busbar 3.FIG. 6 schematically shows a plan view of the busbar side 32 of the second embodiment of the holder 4. the contact region 6 has an elevation 13 which optionally lies opposite the depression on the wall side 31 of the holder 4. In addition, the elevation 13 can have a corresponding shape corresponding to the shape of the depression. The elevation 13 optionally comprises the bore 18, wherein the elevation 13 and / or the bore 18 are joined to a corresponding corresponding elevation 16 and / or corresponding depression 17 of the busbar receiving body and / or to the inner side 27 of the housing. In addition, the elevation 13 has the joining surface 7. As a result, a guide can be provided during the positioning of the holder 4 in the housing 2 and, in addition, can be better counteracted by a shearing force. For common features, reference is made in each case to FIGS. 3, 4 to 5.In addition, the contact region 6 on the busbar side 32 has a joining surface 7 which is joined to a correspondence joining surface 8 on the busbar receiving body 9. In addition, the joining surface 7 and / or the corresponding joining surface 8 can be provided as an adhesion surface for an adhesive bond.The holding region 5 has at least two spacers 23 along the longitudinal direction x, which are separated by the gap 23 and are designed to press with the tip 33 against a busbar 3 in the height direction z in order to fix it in the busbar receiving body 9.In addition, the holder 4 has the bevel 26, which is designed to adapt the holding region 5 to busbars 3 of different sizes.FIG. 7 shows a schematic illustration of a first embodiment of the production method of a busbar arrangement 1. in a first step S 1, at least one busbar 3 is arranged in a housing 2 of the busbar arrangement 1, in particular an upper shell 10 or a lower shell 11, and / or on a busbar receiving body 9 arranged in the housing 2, in particular in the upper shell 10 or in the lower shell 11.In a second step S 2, the holder 4, which is formed at least from a plastic or an elastomer, is integrally molded, in particular foamed, onto a correspondence joining surface 8 on the inner side 27 of the housing 2, in particular the upper shell 10 or the lower shell 11, and / or on the busbar receiving body 9 and optionally on a surface of the busbar 3.Additionally or alternatively, in the second step S 2, the holder 4 is molded or foamed onto a correspondence structure 15 on the inner side 27 and / or on the busbar receiving body 9, which optionally comprises the correspondence joining surface 8.In a supplementary third step S 3, the upper shell 10 and the lower shell 11 are assembled to form the housing 2. As a result, the holder 4 is optionally pressed against the busbar receiving body 9 by means of a mechanical stress which occurs during the joining together of the upper shell 10 and the lower shell 11, with the result that the respective busbar 3 is fixed in the housing 2 and / or the busbar receiving body 9 by means of the spacer 23.FIG. 8 shows a schematic illustration of a second embodiment of the production method of the busbar arrangement 1.In a first step S 1, at least one busbar 3 is arranged in the housing 2 of the busbar arrangement 1, in particular in the upper shell 10 or in the lower shell 11, and / or on the busbar receiving body 9 arranged in the housing 2, in particular in the upper shell 10 or in the lower shell 11.In an optional second step S 2, an adhesive is applied to a joining surface 7 of the holder 4 and / or to the correspondence joining surface 8 on the inner side 27 of the housing 2, in particular the upper shell 10 or the lower shell 11, and / or the busbar receiving body 9.In a third step S 3, the joining surface 7 of the holder 4 is joined to the corresponding joining surface 8 optionally for establishing permanent adhesion of the joining surface 7 to the corresponding joining surface 8 for fixing the busbar 3 in the housing 2. Additionally or alternatively, a structure 12 of the holder 4 is joined to the corresponding structure 15 on the inner side 27 of the housing 2, in particular the upper shell 10 or lower shell 11, and / or on the busbar receiving body 9 and optionally on the surface of the busbar 3. Optionally, the holding region 5 of the holder 4 is joined to the busbar 3.Optionally, in a fourth step S 4, the upper shell 10 and the lower shell 11 are assembled to form the housing 2. As a result, the holder 4 is optionally pressed against the busbar receiving body 9 by means of a mechanical stress which occurs during the joining together of the upper shell 10 and the lower shell 11, with the result that the respective busbar 3 is fixed in the housing 2 and / or the busbar receiving body 9 by means of the spacer 23.Where applicable, all individual features illustrated in the exemplary embodiments can be combined with one another and / or interchanged without departing from the scope of the invention.List of reference characters1 Busbar arrangement 2 Housing 3 Busbar 4 Holder 5 Holding region 6 Contact region 7 Joining surface 8 Correspondence joining surface 9 Busbar receiving body 10 Upper shell 11 Lower shell 12 Structure 13 Elevation 14 Depression 15 Correspondence structure 16 Correspondence elevation 17 Correspondence depression 18 Bore 19 Elongated hole x Longitudinal direction y Transverse direction z Height direction 20 Depression 21 Diameter 22 Phase 23 Spacer 24 Gap 25 Cavity 26 Slope 27 Inner side 28 Screw connection 29 Web 30 Wall thickness 31 Wall side 32 Busbar side 33 Tip S 1 First step S 2 Second step S 3 Third step S 4 Fourth step

Claims

Holder (4) for fixing a busbar (3) in a housing (2), comprising a holding region (5) which is designed for holding a busbar (3), and a contact region (6) which is designed for fixing the holder (4) in the housing (2), wherein a joining surface (7) of the contact region (6) is designed for adhesion to a correspondence joining surface (8) of the housing (2) and / or to a busbar receiving body (9) arranged in the housing (2), characterized in that a bore (18) and / or an elongated hole (19) is included which is designed for forming a joint connection with a correspondence structure (15).Holder (4) according to Claim 1, characterized in that the contact region (6) has a structure (12) comprising an elevation (13) and / or a depression (14) which is designed to form the joint connection with the corresponding corresponding structure (15) of the housing (2) which corresponds thereto.Holder (4) according to one of the preceding claims, characterized in that the depression (14) and / or the elevation (13) has a variable wall thickness (30) in a height direction (z) which is orthogonal to a longitudinal direction (x) and a transverse direction (y) of the busbar (3) orthogonal to the longitudinal direction (x).Holder (4) according to one of the preceding claims, characterized in that the depression (14) and / or the elevation (13) comprises a depression (20) and / or the bore (18) and / or the slot (19) in the height direction (z), wherein the depression (20) and / or the bore (18) and / or the slot (19) have different diameters (21) along the height direction (z).Holder (4) according to one of the preceding claims, characterized in that the joining surface (7) is arranged in the depression (14) and / or on the elevation (13), or the joining surface (7) is arranged in the depression (14) and / or on the elevation (13) and comprises the depression (20) and / or the bore (18) and / or the slot (19).Holder (4) according to one of the preceding claims, characterized in that a spacer (23) is provided in the holding region (5), which spacer is formed from one piece with the holder (4) or at least from a material different from the holder (4) or the spacer (23) is provided in the holding region (5), which spacer is formed from one piece with the holder (4) or at least from a material different from the holder (4), wherein the spacer (23) has a contact shape and / or a cavity (25) and is designed to press against the busbar (3) for fixing.Holder (4) according to one of the preceding claims, characterized in that at least two spacers (23) are provided in the holding region (5) in the longitudinal direction (x) of the busbar (3), wherein the spacers (23) are separated in the longitudinal direction (x) by means of a gap (24).Holder (4) according to one of the preceding claims, characterized in that a bevel (26) is provided in the height direction (z) with respect to a plane along the transverse direction (y) and / or the holding region (5) has a thinner wall thickness (30) than the contact region (6).Housing (2) for a busbar (3) comprising a holder (4) according to one of Claims 1 to 8, wherein the holder (4) comprises a holding region (5) and a contact region (6), wherein the holding region (5) is designed to hold the at least one busbar (3) in the housing (2) and the contact region (6) is designed to fix the holder (4) in the housing (2), wherein the contact region (6) of the holder (4) has a joining surface (7) and the holder (4) on the joining surface (7) is joined to a corresponding mating surface (8) corresponding thereto on an inner side (27) of the housing (2) and / or on a busbar receiving body (9) arranged in the housing (2) for fixing the busbar (3) and / or adheres to the corresponding mating surface (8) by means of the joining surface (7).Housing (2) according to Claim 9, characterized in that the holder (4) has a structure (12) comprising an elevation (13) and / or a depression (14) which forms a joint connection with a corresponding structure (15) which is arranged on the inner side (27) of the housing (2) and / or on the busbar receiving body (9) and corresponds to the structure (12) of the holder (4) and comprises a corresponding corresponding corresponding elevation (16) and / or corresponding depression (17).Housing (2) according to Claim 9 or 10, characterized in that the correspondence joining surface (8) is arranged in the correspondence depression (17) and / or in the correspondence elevation (16), or the correspondence joining surface (8) is arranged in the correspondence depression (17) and / or in the correspondence elevation (16) and in each case comprises a depression (20) and / or a bore (18) and / or an elongated hole (19).Battery or battery system comprising a holder according to one of Claims 1 to 8 and / or a housing according to one of Claims 9 to 11.Motor vehicle comprising a battery or a battery system according to claim 12.Method for fixing at least one busbar (3) by means of a holder (4) according to one of Claims 1 to 8 in a housing (2), comprising the steps: - forming the holder (4) on a correspondence joining surface (8) of the housing (2) and / or on a correspondence structure (15) on an inner side (27) of the housing (2) and / or on a busbar receiving body (9) in the housing (2); - arranging at least the busbar (3) in the housing (2) and fixing with the holder (4).Method for fixing a busbar (3) by means of a holder (4) according to one of Claims 1 to 8 in a housing (2), comprising the steps: - arranging the at least one busbar (3) in the housing (2) and / or on a busbar receiving body (9) arranged in the housing (2); - applying an adhesive to a joining surface (7) of the holder (4) and / or to a correspondence joining surface (8) of the housing (2) and / or on a busbar receiving body (9); - joining the joining surface (7) of the holder (4) to the correspondence joining surface (8); - fixing the busbar (3) in the housing (2) by means of the holder (4).

Images