DE102023003586A1 - Component composite and process for its production - Google Patents

Abstract

The invention relates to a component assembly (1) with a first component (B1), a second component (B2) and several screw connection arrangements (2) by means of which the second component (B2) is fastened to the first component (B1). According to the invention, the respective screw connection arrangement (2) comprises: a first screw element (S1) fastened to the first component (B1), a first seal (D1) between the first component (B1) and the second component (B2) which completely encloses the first screw element (S1) on the circumference, a connection opening (7) in the second component (B2), a bushing (8) which is fastened in the connection opening (7) in a rotationally fixed manner and which projects through the connection opening (7) on both sides of the second component (B2) and rests with a respective angled collar formation (9, 10) on the respective side of the second component (B2), wherein the collar formation (9) of the bushing (8) facing the first component (B1) rests on a support formation (11) of the first screw element (S1), a second screw element (S2) screwed to the first screw element (S1), wherein the bushing (8) is arranged between the two screw elements (S1, S2) and a second seal (D2) between the second screw element (S2) and the collar formation (10) of the bushing (8) facing away from the first component (B1). Furthermore, the invention relates to a method for producing the component assembly (1).

Description

The invention relates to a component composite according to the features of the preamble of claim 1 and a method for its production.

In the CN 102916147 A A pressure compensation device for compensating an internal pressure in a housing of an electrochemical device is described, comprising at least one gas passage opening and at least one membrane element with a gas-permeable membrane that can be deformed depending on a change in the internal pressure and by which the gas passage opening is blocked. The pressure compensation device comprises an emergency degassing element that is designed and arranged such that when a critical deformation of the membrane is reached, it damages the membrane in such a way that the membrane opens the gas passage opening for emergency degassing of the housing.

The invention is based on the object of specifying a component composite that is improved compared to the prior art and a method for its production that is improved compared to the prior art.

The object is achieved according to the invention by a component composite having the features of claim 1 and a method for its production having the features of claim 8.

Advantageous embodiments of the invention are the subject of the subclaims.

A component assembly comprises a first component, a second component and a plurality of screw connection arrangements by means of which the second component is fastened to the first component.

• - ein am ersten Bauteil befestigtes erstes Schraubelement,
• - eine das erste Schraubelement umfangsseitig vollständig umschließende erste Dichtung zwischen dem ersten Bauteil und dem zweiten Bauteil,
• - eine Verbindungsöffnung im zweiten Bauteil,
• - eine in der Verbindungsöffnung drehfest befestigte Buchse, die zu beiden Seiten des zweiten Bauteils durch die Verbindungsöffnung hindurchragt und mit einer jeweiligen abgewinkelten Kragenausformung an der jeweiligen Seite des zweiten Bauteils anliegt, wobei die dem ersten Bauteil zugewandte Kragenausformung der Buchse auf einer Abstützausformung des ersten Schraubelementes aufliegt,
• - ein mit dem ersten Schraubelement verschraubtes zweites Schraubelement, wobei die Buchse zwischen den beiden Schraubelementen angeordnet ist, und
• - eine zweite Dichtung zwischen dem zweiten Schraubelement und der vom ersten Bauteil abgewandten Kragenausformung der Buchse.

According to the invention, the respective screw connection arrangement has the following:

• - a first screw element attached to the first component,
• - a first seal between the first component and the second component, completely enclosing the first screw element on the circumference,
• - a connection opening in the second component,
• - a bushing which is fixed in the connection opening in a rotationally fixed manner and which projects through the connection opening on both sides of the second component and rests with a respective angled collar formation on the respective side of the second component, wherein the collar formation of the bushing facing the first component rests on a support formation of the first screw element,
• - a second screw element screwed to the first screw element, the bushing being arranged between the two screw elements, and
• - a second seal between the second screw element and the collar formation of the bushing facing away from the first component.

Since, in the solution described, all components of the screw connection arrangements are located on the side of the first component facing the second component, this solution makes it possible to fasten the second component to the first component by means of the screw connection arrangements and also to detach it from the first component again without requiring access to the side of the first component facing away from the second component.

The sealing concept implemented using the seals permanently protects the screw connection arrangements, in particular the fastenings of the first screw elements to the first component, from environmental influences, in particular from contact with water, and thus permanently from corrosion. Furthermore, the solution described, in particular the described design of the bushings and their rotationally fixed arrangement in the second component, prevents stress on the connection of the first screw elements to the first component during screwing. Such stress could, for example, lead to stress cracks in the connection and thus to leaks in the first component. Since the bushings rest on the support formations of the first screw elements, a predetermined distance between the two components is ensured, thereby achieving a predetermined, even compression of the first seals. The bushings and their collar formations also prevent stress on the second component from the screw connections, since forces from the screw connections only act on the bushings and are transmitted by them, but do not act on the second component.

The component assembly is designed in particular as a housing unit for a battery, for example for a drive battery of a vehicle. The first component is a battery housing, wherein at least one housing wall of the battery housing has at least one pressure compensation opening on the housing side, wherein the first screw element of the respective screw connection arrangement is fastened to an outside of this housing wall. The second component is a pressure compensation device which is attached to the outside the housing wall is arranged on the housing-side pressure equalization opening and has a base body with a device-side pressure equalization opening closed by a bursting disk, which is in, in particular fluidic, connection to the housing-side pressure equalization opening, wherein the connection opening of the respective screw connection arrangement is formed in this base body. It is particularly provided that the base body is designed as an injection-molded part made of plastic and the respective bushing is injected into the base body, i.e. is circumferentially molded by the base body, in particular by its plastic material. As a result, the respective connection opening is formed at the same time and the bushing is connected to the base body in a rotationally fixed manner. By means of the screw connection arrangements, the base body of the pressure equalization device is thus attached in particular to the outside of the housing wall of the battery housing.

The first seals of the screw connection arrangements are in particular components of a sealing element that is arranged between the base body of the pressure compensation device and the housing wall of the battery housing and completely encloses the pressure compensation opening on the housing side and the pressure compensation opening on the device side on the circumference. As a result, the plurality of first seals can be arranged in a particularly simple manner, for example on the second component, i.e. on the base body of the pressure compensation device, and can be arranged together with the pressure compensation device on the first component, i.e. on the housing wall of the battery housing.

In particular, it is intended that the first screw element is welded to the first component. In the case of such welded joints in particular, the corrosion protection described above and protection against stress when tightening the screw, which is achieved with the solution described, is particularly important.

In particular, it is provided that the first screw element is a threaded bolt and the second screw element is a screw nut. The threaded bolt is also referred to as a welding bolt if it is or will be welded to the first component or is intended to be welded to the first component.

It is particularly provided that the second screw element, designed as a screw nut, has a receiving formation on a side facing away from the bushing, in which a third seal is arranged that completely encloses the first screw element on the circumference and seals against the first screw element and the second screw element. This prevents moisture from penetrating via a thread of the threaded bolt and a thread of the screw nut.

To further ensure this sealing, it is particularly provided that threads of the second screw element designed as a screw nut have a coating, in particular a sealing coating.

In a method for producing the component assembly, the invention provides that the first screw elements, in particular the threaded bolts, are fastened to the first component, in particular by welding. It is also provided that the connection openings are formed in the second component and the bushings are fastened therein, in particular by forming the base body of the pressure compensation device designed as the second component by injection molding and the bushings are injected into the base body, i.e. are molded around the circumference by the material of the base body. It is also provided that the first seals are arranged between the components and the components are arranged on one another, in particular by arranging the sealing element having these first seals on the second component, i.e. on the base body of the pressure compensation device, and the base body of the pressure compensation device is then pushed onto the first screw elements designed as threaded bolts on the housing wall of the first component designed as a battery housing. Furthermore, it is provided that the second screw elements are screwed to the first screw elements, with the second seals being arranged between the second screw elements and the collar formations of the bushings facing away from the first component. This is done in particular by fastening the second seals to the second screw elements designed as screw nuts before screwing them on, and then screwing these second screw elements onto the first screw elements designed as threaded bolts. The second screw elements are screwed tight in particular with a predetermined torque so that the first screw elements are prevented from tearing off.

It is particularly provided that the respective third seal is arranged in the receiving formation of the respective second screw element. This takes place in particular before screwing onto the respective first screw element. The respective third seal is arranged in particular in the receiving formation of the respective second screw element in such a way that that it is attached to the second screw element, in particular is held in the receiving formation and in particular is connected to the second screw element in a rotationally fixed manner. This is achieved, for example, by a flange on the receiving formation, which is created, for example, after the third seal has been arranged in the receiving formation or which is already present beforehand, wherein the third seal is then deformed, for example, in order to insert it past the flange into the receiving formation.

By means of the solution described, in particular the second component designed as a pressure compensation device can be screwed from the outside onto the first component designed as a battery housing and can also be removed again without any major effort, for example in the event of servicing, without having to open the battery housing.

The described sealing concept, in particular with the first, second and third seals and advantageously with the coating of the threads of the second screw element designed as a screw nut, permanently protects the fastening points, in particular the welds of the screw elements designed as threaded bolts, from corrosion. Likewise, as already described, the weld seam cannot be stressed when screwing, which could otherwise lead to stress cracks and resulting leaks in the battery housing.

The solution described is particularly advantageous for high-voltage batteries, i.e. drive batteries for battery-electric vehicles, because these are used in different climatic and weather conditions. This repeatedly leads to corrosion at housing breakthrough points, which in the prior art are intended, for example, for fastening the pressure compensation device using screws through the housing wall. Seals at such housing breakthrough points can be undermined and water can penetrate into the battery. This can, for example, cause a short circuit or it can lead to battery failure due to corrosion. In addition, in the prior art, the battery housing has to be opened in order to unscrew the pressure compensation device for replacement.

These disadvantages are avoided by the solution described, since this solution does not require any housing breakthroughs to attach the pressure compensation device to the battery housing. The solution described, in particular the described fastening and sealing concept, thus makes it possible to easily replace the pressure compensation device, while at the same time providing a robust and durable corrosion-protected attachment to the high-voltage battery.

In summary, the solution described enables easy attachment of the pressure compensation device, is service-friendly, corrosion-protected and enables easy leak testing.

Embodiments of the invention are explained in more detail below with reference to drawings.

• 1 schematisch eine Draufsicht auf einen Ausschnitt eines als Batteriegehäuse ausgebildeten ersten Bauteils eines Bauteilverbundes,
• 2 schematisch eine Schnittdarstellung des als Gehäuseeinheit für eine Batterie ausgebildeten Bauteilverbundes im Bereich einer Schraubverbindungsanordnung,
• 3 schematisch eine perspektivische Darstellung eines Gewindebolzens der Schraubverbindungsanordnung,
• 4 schematisch eine Schnittdarstellung des Gewindebolzens,
• 5 schematisch eine weitere Schnittdarstellung des Gewindebolzens,
• 6 schematisch eine Draufsicht auf eine Schraubenmutter der Schraubverbindungsanordnung,
• 7 schematisch eine weitere Draufsicht auf die Schraubenmutter,
• 8 schematisch eine Schnittdarstellung der Schraubenmutter, und
• 9 schematisch eine weitere Schnittdarstellung der Schraubenmutter.

The following show:

• 1 schematically a plan view of a section of a first component of a component assembly designed as a battery housing,
• 2 schematically a sectional view of the component assembly designed as a housing unit for a battery in the area of a screw connection arrangement,
• 3 schematically a perspective view of a threaded bolt of the screw connection arrangement,
• 4 schematically a sectional view of the threaded bolt,
• 5 schematically another sectional view of the threaded bolt,
• 6 schematically a top view of a screw nut of the screw connection arrangement,
• 7 schematically another top view of the screw nut,
• 8 schematically a sectional view of the screw nut, and
• 9 schematically another sectional view of the screw nut.

Corresponding parts are provided with the same reference numerals in all figures.

Based on the 1 to 9 In the following, a component assembly 1 with a first component B1, a second component B2 and several screw connection arrangements 2, by means of which the second component B2 is fastened to the first component B1, and a method for producing the component assembly 1 are described.

In the embodiment shown, the component assembly 1 is designed as a housing unit for a battery of a vehicle, in particular for a high-voltage battery, i.e. drive battery, of an electric vehicle, and is therefore also referred to below as housing unit 1.

The first component B1 in this embodiment is a battery housing and is therefore also referred to below as battery housing B1, wherein at least one housing wall 3 of the battery housing B1 has at least one pressure equalization opening 4 on the housing side, as shown in 1 For reasons of clarity, the battery housing B1 is not shown in the 1 and 2 only this housing wall 3 is shown.

The second component B2 in this embodiment is a pressure compensation device and is therefore also referred to below as pressure compensation device B2. It is arranged on an outside of the housing wall 3 at the housing-side pressure compensation opening 4 and has a base body 5 with a device-side pressure compensation opening closed by a bursting disk, which is in, in particular, fluidic connection to the housing-side pressure compensation opening 4. By means of the four screw connection arrangements 2 in the embodiment shown, the base body 5 of the pressure compensation device B2 is fastened in particular to the outside of the housing wall 3 of the battery housing B1.

In the illustrated embodiment according to 2 only a section of the base body 5 is shown. The pressure equalization opening on the device side and the bursting disc are not shown for reasons of clarity.

The respective screw connection arrangement 2 has a first screw element S1 fastened to the outside of the housing wall 3 of the battery housing B1. This first screw element S1 is designed as a threaded bolt in the embodiment shown and is therefore also referred to below as threaded bolt S1. The threaded bolt S1 is fastened to the housing wall 3 of the battery housing B1 by welding, in particular welded to the housing wall 3 by means of a projection welding process or tip ignition welding process. The first screw element S1 is therefore also referred to as a welding bolt. In the 3 to 5 This first screw element S1, designed as a threaded bolt S1, is shown in more detail.

The respective screw connection arrangement 2 further comprises a first seal D1, which completely surrounds the threaded bolt S1 on the circumference, between the housing wall 3 of the battery housing B1 and the base body 5 of the pressure compensation device B2. This prevents moisture from penetrating between the housing wall 3 and the base body 5 to the threaded bolt S1, in particular to its weld connection, in particular the weld root 12, and thus prevents the risk of corrosion.

As in 1 As shown, the first seals D1 of the screw connection arrangements 2 are components of a sealing element 6, which is arranged between the base body 5 of the pressure compensation device B2 and the housing wall 3 of the battery housing B1 and completely encloses the pressure compensation opening 4 on the housing side and the pressure compensation opening on the device side on the circumference. This makes it particularly easy to arrange the several first seals D1 all together on the base body 5 of the pressure compensation device B2 and then push the pressure compensation device B2 onto the threaded bolts S1.

To make this possible, the respective screw connection arrangement 2 has a connection opening 7 in the base body 5 of the pressure compensation device B2 and a bushing 8 that is fixed in the connection opening 7 in a rotationally fixed manner. This bushing 8 protrudes through the connection opening 7 on both sides of the base body 5 and rests against the respective side of the base body 5 with a respective angled collar formation 9, 10. These connection openings 7 with the bushings 8 arranged therein in a rotationally fixed manner in the base body 5 are achieved, for example, by producing the base body 5 by injection molding, wherein the bushings 8 are injected into the base body 5, i.e. are molded around the circumference by a material, in particular plastic, of the base body 5.

The collar formation 9 of the bushing 8 facing the housing wall 3 of the battery housing B1 rests on a support formation 11 of the threaded bolt S1, which in the embodiment shown is formed, for example, in the shape of a plate or a plate edge around the circumference of the threaded bolt S1. This support formation 11 is particularly formed on the threaded bolt S1 in such a way that it has a predetermined distance from the housing wall 3 when the threaded bolt S1 is welded to the housing wall 3.

By the bushing 8 fastened in the base body 5 resting on the support formation 11 of the threaded bolt S1, the maintenance of a predetermined distance between the base body 5 of the pressure compensation device B2 and the housing wall 3 of the battery housing B1 and thus a predetermined uniform pressing of the sealing element 6, in particular also of the first seals D1, is ensured.

The respective screw connection arrangement 2 further comprises a second screw element S2 screwed to the threaded bolt S1, which in the embodiment shown is designed as a Screw nut and is therefore also referred to as screw nut S2. In the 6 to 9 the second screw element S2, designed as a screw nut S2, is shown in more detail.

After pushing the base body 5 with its bushings 8 fastened in the connection openings 7 onto the threaded bolts S1, the respective screw nut S2 is screwed onto the respective threaded bolt S1 and tightened with a predetermined torque so that the threaded bolts S1 are prevented from breaking off. This predetermined torque is, for example, in a range of approximately 6.3 Nm to approximately 7.7 Nm, preferably 7 Nm.

The bushing 8, which is arranged between the screw nut S2 and the support formation 11 of the threaded bolt S1 and which is connected to the base body 5 in a rotationally fixed manner, prevents a transmission of torque from the screw nut S2 to the threaded bolt S1, which can lead to stress cracks in the weld connection of the threaded bolt S1 with the housing wall 3. In addition, this avoids a load and the resulting possible damage to the base body 5 due to the base body 5 being pressed together when the screw nut S2 is tightened, because the forces of the screw connection of the screw nut S2 with the threaded bolt S1 only act on the bushing 8 and not on the base body 5, which means that the latter cannot be pressed by the screw connection and damaged.

For further sealing against moisture that could penetrate along the threaded bolt S1 to its welded connection with the housing wall 3, the screw nut S2 has a second seal D2, which is arranged between the screw nut S2 and the collar formation 10 of the bushing 8 facing away from the housing wall 3 when the screw nut S2 is screwed onto the threaded bolt S1. In the embodiment shown, this second seal D2 is designed as a sealing disk, which is attached to the screw nut S2 by enclosing a peripheral bead 13 of the screw nut S2.

Furthermore, for further sealing against moisture that could penetrate along the threaded bolt S1 to its welded connection with the housing wall 3, the screw nut S2 has a receiving formation 14 on a side facing away from the bushing 8, in which a third seal D3 is arranged, which completely encloses the threaded bolt S1 on the circumference and seals against the threaded bolt S1 and the screw nut S2. In the embodiment shown, this receiving formation 14 has a flange 15, so that the third seal D3 can be arranged therein, for example by pressing in with elastic deformation of the third seal D3, and is then held in a form-fitting and, for example, force-fitting manner by the flange 15. Alternatively, for example, the third seal D3 can first be inserted into the receiving formation 14 and then the flange 15 can take place, i.e. an edge of the screw nut S2 is flanged inwards in order to hold the third seal D3 in this way. This positive holding of the third seal D3 by means of the flange 15 in particular prevents the third seal D3 from lifting off the screw nut S2 when the screw nut S2 is screwed onto the threaded bolt S1.

Furthermore, the screw nut S2 has a, in particular sealing, coating 16 on its threads for further sealing against moisture that could penetrate along the threaded bolt S1 to its weld connection with the housing wall 3.

In the method for producing the component assembly 1, in the embodiment shown thus for producing the housing unit 1, the threaded bolts S1 are fastened to the outside of the housing wall 3 of the battery housing B1 by welding, in particular by means of the projection welding method or tip ignition welding method. The connection openings 7 are formed in the base body 5 of the pressure compensation device B2 and the bushings 8 are fastened therein, in particular by forming the base body 5 by injection molding and injecting the bushings 8 into the base body 5, i.e. by having the material of the base body 5 overmolded around the circumference. The first seals D1 are arranged between the base body 5 and the housing wall 3, in particular by arranging the sealing element 6 with the first seals D1 on the base body 5 and pushing the base body 5 onto the threaded bolts S1. The screw nuts S2, which each have the second seal D2 and the third seal D3 as well as the coating 16 of their threads, are screwed onto the threaded bolts S1, whereby the second seals D2 are arranged between the screw nuts S2 and the collar formations 10 of the bushings 8 facing away from the housing wall 3. The screw nuts S2 are screwed tight with the specified torque.

Since in the described solution all components of the screw connection arrangements 2 are on the side facing the base body 5 outside of the housing wall 3, this solution makes it possible to attach the pressure compensation device B2 to the outside of the housing wall 3 by means of the screw connection arrangements 2 and to detach it again from there without having to open the battery housing B1.

The sealing concept implemented by means of the seals D1, D2, D3 and the sealing coating 16 permanently protects the screw connection arrangements 2, in particular the welded fastenings of the threaded bolts S1 on the housing wall 3, from environmental influences, in particular from contact with water, and thus permanently from corrosion. Furthermore, the solution described, in particular the described design of the bushings 8 and their rotationally fixed arrangement in the base body 5 of the pressure compensation device B2, prevents stress on the welded connection of the threaded bolts S1 with the housing wall 3 during screwing and the resulting stress cracks. The bushings 8 resting on the support formations 11 of the threaded bolts S1 and firmly connected to the base body 5 also ensure a predetermined distance between the base body 5 and the housing wall 3 and thus a predetermined uniform pressing of the sealing element 6 and the first seals D1.

The bushings 8 are made in particular of steel and are coated in particular with a tin-nickel alloy or zinc-nickel alloy. The steel is in particular EN 10268-1.0550 HC380LA.

The battery housing B1 has in particular a cathodic dip coating and/or is coated with a tin-nickel alloy or zinc-nickel alloy.

The base body 5 is, as already mentioned, made in particular of plastic and in particular as an injection-molded part. It is made in particular of a thermoplastic, in particular of PP GF30, i.e. of polypropylene with 30% glass fibers. In addition, the base body 5 or the entire pressure compensation device B2 can be designed to be flame-retardant, in particular in accordance with UL94 V0.

The sealing element 6 with the first seals D1 is made in particular from an elastomer, for example from silicone, and has in particular a hardness of 60 Shore A. In one possible embodiment, the sealing element 6 with the first seals D1 is made, for example, from VMQ (vinyl methyl silicone). In one possible embodiment, the sealing element 6 with the first seals D1, in particular from an elastomer, in particular from silicone, is injection-molded onto the base body 5 and/or sprayed onto it and/or injected into it. The base body 5 is then designed, for example, as a two-component component, for example a two-component injection-molded component. The above-described arrangement of the sealing element 6 with the first seals D1 on the base body 5 is therefore carried out in this way in this embodiment.

The second seal D2 is in particular a sealing disk. It is made in particular from polyamide, in particular from PA66 or PA6.6. It has, for example, a notched impact strength 1 eA (ISO 179) of 4.2 kJ/m ² and/or a solution viscosity (m-cresol,c = 10 g/l) of 3.04 and/or a residual moisture content (Karl Fischer) of 0.06%. In particular, it is arranged on the screw nut S2 in a captive and easily rotatable manner.

The third seal D3 is in particular a so-called polyring. It is made in particular from polyamide, in particular from PA66 or PA6.6.

The coating 16 is in particular made of acrylate or has acrylate as a chemical base. It in particular has a thread speed of 0.12 to 0.18. It in particular has a screwing torque of 2 Nm to 5 Nm.

The threaded bolt S1 is made of C15C (1.0234) in accordance with EN 10263-2, suitable for welding. It has a strength of 6.8 in accordance with EN ISO 898-1. Its surface is galvanized, for example with a thickness of galvanization of 6 µm to 12 µm, preferably 9 µm. It is colorless chromated (chromium VI free). It has a fully formed thread.

The screw nut S2 is made of steel. The following applies in particular to the screw nut S2: strength class 8, expansion min. 6%, test force 17.2 kN. When coating 16 of the threads, the first thread (groove side) in particular is free.

The pressure compensation device B2 has, for example, a membrane which is made in particular of a plastic, in particular thermoplastic, in particular of polyethylene terephthalate (PET).

The pressure compensation device B2 comprises, for example, a particle filter which is made in particular of metal, in particular of steel, in particular or as a metal sheet, in particular steel sheet, in particular EN 10139-1.0330.

• Maß a (Durchmesser Abstützausformung 11): 13 mm
• Maß b (Gewindemaß): M6
• Maß c (Gesamtlänge): 23,3 mm
• Maß d (Länge gewindeseitiges Ende): 19,3 mm
• Maß e (Länge anderes Ende): 3,5 mm bis 4,1 mm, bevorzugt 4 mm
• Maß f (Länge Abstützausformung 11): 1,3 mm
• Maß g (insbesondere Länge vollausgeformtes Gewinde): 13 mm
• Maß h: 22,6 mm
• Maß i: 3 mm bis 3,3 mm, bevorzug 3,3 mm
• Maß j (Durchmesser): 2,5 mm bis 2,8 mm, bevorzugt 2,6 mm
• Maß k: 90°
• Maß I: 7°

Based 5 Example dimensions of the threaded bolt S1 are described below.

• Dimension a (diameter of support formation 11): 13 mm
• Dimension b (thread size): M6
• Dimension c (total length): 23.3 mm
• Dimension d (length of threaded end): 19.3 mm
• Dimension e (length of other end): 3.5 mm to 4.1 mm, preferably 4 mm
• Dimension f (length of support formation 11): 1.3 mm
• Dimension g (especially length of fully formed thread): 13 mm
• Dimension h: 22.6 mm
• Dimension i: 3 mm to 3.3 mm, preferably 3.3 mm
• Dimension j (diameter): 2.5 mm to 2.8 mm, preferably 2.6 mm
• Dimension k: 90°
• Dimension I: 7°

• A: Bezugspunkt
• Maß m (Außendurchmesser der Aufnahmeausformung 14): maximal 10 mm
• Maß n (Gesamtlänge): maximal 9,6 mm
• Maß o: 90° bis 120°, bevorzugt 90°
• Maß p (Durchmesser der zweiten Dichtung D2): 14,7 mm bis 15,3 mm, bevorzugt 15 mm Maß q (Durchmesser): 10,4 mm bis 10,7 mm, bevorzugt 10,7 mm
• Maß r (Durchmesser): maximal 6,75 mm
• Maß s (Gewindemaß): M6
• Maß t: 0,35 mm bis 0,65 mm, bevorzugt 0,5 mm
• Maß u: 0,7 mm bis 0,9 mm, bevorzugt 0,8 mm
• Maß v: 2,85 mm bis 3,15 mm, bevorzugt 3 mm
• Maß w: 0,15 mm senkrecht zum Bezugspunkt A
• Maß x: 9,78 mm bis 10 mm, bevorzugt 10 mm
• Maß y: mindestens 11,05 mm
• Maß z: 0,44 mm, d. h. die Achse der Mantelfläche des Maßes z muss in einem zylindrischen Toleranzbereich von 0,44 mm konzentrisch zum Bezugspunkt A sein.
• Maß zz: 0,06 mm, d. h. die Achse der Mantelfläche des Maßes zz muss in einem zylindrischen Toleranzbereich von 0,06 mm parallel zum Bezugspunkt A sein.

Based on the 7 and 9 Example dimensions of the screw nut S2 are described below.

• A: reference point
• Dimension m (outer diameter of the receiving formation 14): maximum 10 mm
• Dimension n (total length): maximum 9.6 mm
• Dimension o: 90° to 120°, preferably 90°
• Dimension p (diameter of the second seal D2): 14.7 mm to 15.3 mm, preferably 15 mm Dimension q (diameter): 10.4 mm to 10.7 mm, preferably 10.7 mm
• Dimension r (diameter): maximum 6.75 mm
• Dimension s (thread size): M6
• Dimension t: 0.35 mm to 0.65 mm, preferably 0.5 mm
• Dimension u: 0.7 mm to 0.9 mm, preferably 0.8 mm
• Dimension v: 2.85 mm to 3.15 mm, preferably 3 mm
• Dimension w: 0.15 mm perpendicular to reference point A
• Dimension x: 9.78 mm to 10 mm, preferably 10 mm
• Dimension y: at least 11.05 mm
• Dimension z: 0.44 mm, i.e. the axis of the lateral surface of dimension z must be concentric to the reference point A within a cylindrical tolerance range of 0.44 mm.
• Dimension zz: 0.06 mm, i.e. the axis of the lateral surface of dimension zz must be parallel to the reference point A within a cylindrical tolerance range of 0.06 mm.

The features and advantages described herein with respect to a component composite may also relate to a method described herein for producing a component composite and vice versa.

list of reference symbols

1

component assembly, housing unit

2

screw connection arrangement

3

housing wall

4

pressure equalization opening on the housing side

5

base body

6

sealing element

7

connection opening

8

socket

9, 10

collar shape

11

support formation

12

sweat root

13

bead

14

recording design

15

flanging

16

coating

A

reference point

B1

first component, battery housing

B2

second component, pressure compensation device

D1

first poem

D2

second seal

D3

third poem

S1

first screw element, threaded bolt

S2

second screw element, screw nut

a to zz

measure

QUOTES INCLUDED IN THE DESCRIPTION

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Cited patent literature

• CN 102916147 A [0002]

Claims (10)

Component assembly (1) with a first component (B1), a second component (B2) and several screw connection arrangements (2), by means of which the second component (B2) is fastened to the first component (B1), characterized in that the respective screw connection arrangement (2) has: - a first screw element (S1) fastened to the first component (B1), - a first seal (D1) between the first component (B1) and the second component (B2), which completely encloses the first screw element (S1) on the circumference, - a connection opening (7) in the second component (B2), - a bushing (8) fastened in the connection opening (7) in a rotationally fixed manner, which projects through the connection opening (7) on both sides of the second component (B2) and rests with a respective angled collar formation (9, 10) on the respective side of the second component (B2), wherein the collar formation (9) of the bushing (8) facing the first component (B1) rests on a support formation (11) of the first screw element (S1), - a second screw element (S2) screwed to the first screw element (S1), wherein the bushing (8) is arranged between the two screw elements (S1, S2), and - a second seal (D2) between the second screw element (S2) and the collar formation (10) of the bushing (8) facing away from the first component (B1). Component assembly (1) according to claim 1 , characterized by a design as a housing unit (1) for a battery, - wherein the first component (B1) is a battery housing (B1), wherein at least one housing wall (3) of the battery housing (B1) has at least one housing-side pressure equalization opening (4), wherein the first screw element (S1) of the respective screw connection arrangement (2) is fastened to an outer side of this housing wall (3), and - wherein the second component (B2) is a pressure equalization device (B2) which is arranged on the outer side of the housing wall (3) at the housing-side pressure equalization opening (4) and has a base body (5) with a device-side pressure equalization opening closed by a rupture disk, which is in fluid communication with the housing-side pressure equalization opening (4), wherein the connection opening (7) of the respective screw connection arrangement (2) is formed in this base body (5). Component assembly (1) according to claim 2 , characterized in that the first seals (D1) of the screw connection arrangements (2) are components of a sealing element (6) which is arranged between the base body (5) of the pressure compensation device (B2) and the housing wall (3) of the battery housing (B1) and completely encloses the housing-side pressure compensation opening (4) and the device-side pressure compensation opening on the circumference. Component assembly (1) according to one of the preceding claims, characterized in that the first screw element (S1) is welded to the first component (B1). Component assembly (1) according to one of the preceding claims, characterized in that the first screw element (S1) is a threaded bolt (S1) and the second screw element (S2) is a screw nut (S2). Component assembly (1) according to claim 5 , characterized in that the second screw element (S2) designed as a screw nut (S2) has a receiving formation (14) on a side facing away from the bushing (8), in which a third seal (D3) is arranged which completely encloses the first screw element (S1) on the circumference and seals against the first screw element (S1) and the second screw element (S2). Component assembly (1) according to claim 5 or 6 , characterized in that threads of the second screw element (S2) designed as a screw nut (S2) have a coating (16). Method for producing a component assembly (1) according to one of the preceding claims, wherein - the first screw elements (S1) are fastened to the first component (B1), - the connecting openings (7) are formed in the second component (B2) and bushings (8) are fastened therein, - the first seals (D1) are arranged between the components (B1, B2) and the components (B1, B2) are arranged next to one another, and - the second screw elements (S2) are screwed to the first screw elements (S1), wherein the second seals (D2) are arranged between the second screw elements (S2) and the collar formations (10) of the bushings (8) facing away from the first component (B1). procedure according to claim 8 , characterized in that the second screw elements (S2) are tightened with a predefined torque. procedure according to claim 8 or 9 , characterized in that the respective third seal (D3) is arranged in the receiving formation (14) of the respective second screw element (S2).

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