Sealing assembly having connecting means, in particular adhesive strip

Abstract

The invention relates to a sealing assembly (10) for sealing a housing, in particular a battery housing, having at least one sealing portion (1.1, 1.2) which has two end regions (2.1, 2.2) arranged at the ends, wherein either both end regions (2.1, 2.2) of the sealing portion (1.1, 1.2) abut one another, or wherein the end regions (2.1, 2.2) of the sealing portion (1.1, 1.2) abut the end regions (2.1, 2.2) of adjacent sealing portions (1.1, 1.2), and wherein at least two of the abutting end regions (2.1, 2.2) are interconnected via a connecting means (6) covering the joint (5) located between the two end regions (2.1, 2.2). The invention further relates to a method for producing a sealing arrangement (10).

Description

[0001] Sealing arrangement with connecting element, in particular adhesive strips

[0002] The invention relates to a sealing arrangement for sealing a housing, in particular a battery housing, with at least one sealing section having two end regions arranged at the ends, wherein either the two end regions of the sealing section abut each other or wherein the end regions of the sealing section abut each of the end regions of adjacent sealing sections. The invention further relates to a method for manufacturing a sealing arrangement.

[0003] Seals are commonly used to seal fluids between two components. A typical application for seals is in housings, where the seal is intended to protect the interior from unwanted fluid ingress from the outside or to prevent fluid from escaping from the inside of the housing. Especially in larger housings, such as oil pans, engine housings, or battery housings, corresponding sealing arrangements can consist of several sealing sections that are then joined together to create a closed seal. It is also theoretically possible to assemble a single, for example, strand-shaped sealing section into a closed seal and join the two ends together.

[0004] The multiple sealing sections each have end sections arranged at their ends, allowing them to be connected to adjacent sealing sections. This means that each sealing section is connected at its end to another sealing section, similar to a chain. By connecting the last sealing section to the first, a circumferentially closed sealing arrangement of any size can be created. Particularly in the case of a long sealing section, the two end sections of a single sealing section can also be connected to each other to create a circumferentially closed sealing arrangement.

[0005] While such sealing arrangements have proven effective in practice and allow for high variability, particularly when connecting multiple sealing sections, and the production of sealing arrangements of different sizes, leaks can quickly occur at the joint between two connected end sections, especially if the sealing sections or the adjacent end sections can move relative to each other to some extent. Particularly when very high sealing requirements are placed on the seal and also under comparatively high pressure differentials, such seals quickly reach their limits.

[0006] Based on this, the invention aims to provide a sealing arrangement that is characterized by a more reliable seal.

[0007] This problem is solved in a sealing arrangement of the type mentioned above by connecting at least two of the adjacent end regions to each other via a connecting element covering the seam located between the two end regions.

[0008] The connecting element ensures that the two end sections are in contact with each other to guarantee sufficient fluid tightness and do not move relative to each other. The assembly of the sealing device is also simplified by ensuring a defined position of the sealing sections or end areas, as the sealing arrangement can be used as a continuous and circumferentially closed sealing profile. This means that the end areas can be connected to each other before the sealing arrangement is assembled and therefore cannot move relative to each other during assembly.

[0009] The joint between the adjoining end sections is usually the main cause of leaks, and by covering this joint and thus a potential leak point, the connector can not only join the two end sections but also provide a degree of sealing. To connect the two end sections, the connector can be attached to both end sections. That is, the connector can be attached to one end section on one side and to the other end section on the other side.

[0010] The seam can lie in a plane vertical to the longitudinal extent of the sealing sections, so that the two end regions can butt against each other. However, the seam can also lie in a plane inclined to this plane. This can be the case, for example, if the end regions do not butt against each other, but rather overlap. Furthermore, the end regions can also have one or more steps, so that the seam does not lie in a single plane, but rather has a more complex structure.

[0011] By using a sealing assembly consisting of several interconnected sealing sections, material waste during the manufacturing of the individual sealing sections can be significantly reduced compared to a single-piece sealing assembly, as the sealing sections can be stamped from sealing material close together. The waste generated when stamping a single-piece sealing assembly—that is, the area not used for sealing and surrounded by the assembly—is eliminated when stamping multiple sealing sections. Depending on the size of the sealing assembly, this can result in material savings of sometimes over 70%.

[0012] It has proven advantageous if the connecting element is bonded to at least one of the two adjacent end regions, preferably to both, by force and / or material bonding. This design prevents the two end regions from moving relative to each other, which could negatively affect the seal. The force and / or material bonding to the two end regions ensures that the two end regions cannot be pulled apart, which would enlarge the joint and thus cause leaks, nor does it prevent the two end regions from moving laterally relative to each other. The connecting element can therefore be adapted to the forces expected during assembly as well as during use of the sealing arrangement.

[0013] Furthermore, it has proven advantageous for the fastener to circumferentially enclose the end regions. This allows the fastener to contact both end regions over a comparatively large area, ensuring a reliable hold and connection between the fastener and the two end regions.

[0014] From a design perspective, it has proven advantageous for the connecting element to be a shrink element, particularly a heat-shrink tube. A shrink element is characterized by its ability to contract when exposed to temperature changes, especially heating. This shrinkage allows the shrink element to be positively connected to the two end sections. As it shrinks, the shrink element conforms to the circumference of the end sections and exerts a radial force on them along the longitudinal direction of the sealing sections, resulting in a positive connection. The use of a heat-shrink tube has proven particularly advantageous.This is because it is a circumferentially closed shrink element, meaning that the shrink tubing is pressed or pulled against both end sections with a certain force when heated or when the shrinking temperature is reached. Furthermore, the shrinking of the shrink element ensures good adhesion between the fastener and the corresponding end section.

[0015] A heat source, such as an oven, particularly a convection oven or an infrared oven, can be provided to shrink or heat the shrink element. After the correct positioning of the connector(s), the sealing device can be placed in the oven, causing the connector or shrink element to shrink and join the end sections. Alternatively, the connector(s) can be heated only at specific points, so that the sealing sections are not heated, or only heated to a certain extent. This can be particularly advantageous if the sealing sections do not have sufficient temperature tolerance. Heating only the shrink elements, and not the other parts of the sealing assembly, also reduces the overall energy required. For targeted heating of the shrink elements, the heat source can be, for example, an infrared heater or a hot air gun.In practice, heating temperatures of approximately 80 degrees have proven effective, although the heating temperature depends primarily on the material of the shrink element.

[0016] Regarding the shrink element, it has proven advantageous for it to be made of heat-shrinkable film. Specifically, polyethylene or PVC can be used as suitable materials. PVC is particularly advantageous because it is characterized by both good stability at a low thickness and a certain degree of elasticity. Furthermore, PVC exhibits high temperature resistance and can be used for sealing against various fluids.

[0017] In its unshrunk state, the inner circumference of the shrink element or shrink tubing can be slightly larger than the circumference of the end sections to be joined. Advantageously, the inner circumference is less than 10%, preferably less than 5%, and most preferably less than 2% larger than the circumference of the end section. This allows the shrink element to be easily slipped onto an end section, as will be explained in more detail below with regard to the manufacturing process. After shrinking, the shrink element or shrink tubing then fits as tightly as possible around the circumference of the end sections, so that the circumference is essentially identical.

[0018] The shrink element is advantageously very thin, as excessive thickness can lead to leaks at its ends. If the thickness is too great, a gap can form on the top and bottom surfaces of the sealing sections, extending transversely to their longitudinal direction. The size of this gap depends not only on the shrink element's thickness but also on the elasticity of the material used for both the shrink element and the sealing sections, as well as on the force pressing the two components together. Furthermore, a comparatively large shrink element thickness can potentially cause undesirable deformation of the sealing sections or their ends. Additionally, the shrink element material can also provide some compensation for the surface roughness of the components.

[0019] Advantageously, the thickness or wall thickness of the shrink element is thinner than that of the sealing section. In particular, the thickness or wall thickness of the shrink element is less than the thickness of the sealing section by a factor of more than 2, preferably by a factor of more than 5, particularly preferably by a factor of more than 10, and most preferably by a factor of more than 20. The thickness of the sealing section refers to the thickness of the compressed sealing section, which will be explained in more detail below. Advantageously, the thickness or wall thickness of the shrink element is less than 1 mm, preferably less than 0.5 mm, particularly preferably less than 0.2 mm, and most preferably less than 0.1 mm.

[0020] Furthermore, it has proven particularly advantageous with regard to the connector designed as a shrink-fit element if the connector is positively connected to at least one of the two end regions, and preferably to both end regions, in addition to the force-fit connection. A combination of force-fit and positive-fit connections can further improve the hold between the connector and the end regions, thus further reducing the risk of leakage due to even minimal relative movement. It is also possible to provide for an additional material-bonded connection between the elements. This can be achieved, for example, by applying an adhesive layer to the shrink-fit element on the side that comes into contact with the end regions.This material-bonded connection can further improve the hold and stability of the connection, which can also have a further beneficial effect on the tightness.

[0021] To achieve a positive-locking connection between the end section(s) and the fastener, at least one end section may have a profiled contour. This profiled contour allows the end section and the fastener to interlock, further improving the fastener's hold on the end section. Advantageously, both end sections have a corresponding profiled contour, ensuring that the fastener is reliably connected to the end sections of the sealing sections on both sides. The profiling can extend longitudinally along the sealing sections and, in particular, be arranged laterally, so that the profiling does not negatively affect the sealing effect. The end sections can thus have a nearly constant height to ensure a reliable seal. This is especially important when the fastener is used as a shrink-fit element or...Designed as a heat shrink tube, the profiled contour of the end(s) ensures a good connection. When the heat shrink element is shrunk on, it can fit snugly against the end(s) and, due to its profiled contour, form a positive connection with them.

[0022] Regarding the profiled contour, a wave-like shape has proven advantageous. A wave-like shape provides a secure grip for the fastener and ensures that the fastener, particularly during shrink-fitting, is not perforated or damaged by the profiled contour. The wave troughs and crests can extend transversely to the longitudinal direction of the sealing section and lie in the same plane as the sealing section. However, if the fastener is sufficiently stable, a zigzag shape or other profile can be used instead of a wave-like shape. The profiled contour can have one or more undercuts in the transverse direction to the longitudinal direction of the corresponding sealing section, which primarily contribute to a secure connection.In a wavy profile, the troughs of the waves can represent the corresponding undercuts.

[0023] To produce a sealing arrangement of the type described above, a manufacturing process is described below in which the adjacent end areas are connected to each other via a shrink element.

[0024] In this system, at least one sealing section with two end sections is initially provided, and then optionally another sealing section with two end sections is added. A shrink element, in particular a heat shrink tube, is also provided. The shrink element is positioned on one end section. Specifically, the shrink element or heat shrink tube can be attached to the end of a sealing section or end section, or the end section of the sealing section can be inserted into the shrink element. The corresponding sealing section and the shrink element can be moved relative to each other in the longitudinal direction of the sealing section. The end section can thus be positioned, at least partially, within the shrink element. After the shrink element has been positioned accordingly, it can protrude from the end section of the sealing section.The shrink element, with its half-length, is advantageously positioned opposite the end area.

[0025] In the next step, the shrink element is positioned on the other end section so that the two end sections are in contact. The other end section can be inserted into the protruding part of the shrink element, or the protruding part of the shrink element can be attached to the other end section. The two end sections can then touch each other and can each be positioned equally within the shrink element. This ensures a reliable and similarly strong connection at both end sections.

[0026] Finally, the shrink element is heated, causing it to shrink onto the two end sections. This shrinking process makes it impossible to remove the two end sections from the shrink element without damaging them and to move them longitudinally. As a result, the shrink element reliably holds the two end sections in position and connects them. Because the two end sections can no longer move relative to each other, a reliable seal is achieved even across the seam between the two end sections, preventing media from passing through the seam from one side of the sealing assembly to the other.

[0027] Furthermore, a mounting plate is proposed with which a sealing arrangement, in particular consisting of several sealing sections, preferably a sealing arrangement of the type described above, can be manufactured or assembled. The mounting plate has a top and a bottom surface, and several fixing bolts are arranged on the top surface for fixing the sealing sections. The mounting plate also has at least one recess over which a connecting element, in particular a shrink element, of the sealing arrangement can extend, so that the connecting element can be heated from the underside of the mounting plate by a heat source.

[0028] First, the pre-assembled sealing assembly can be positioned on the mounting plate using the fixing bolts. A pre-assembled sealing assembly is defined as one in which fasteners or shrink elements have already been positioned at the adjacent end sections, but where a final connection between the fasteners and the respective end sections or sealing sections has not yet been established. In the case of a shrink element, this means it has not yet been heated and shrunk onto the end sections. The fixing bolts can have a circular cross-section and extend perpendicularly from the top of the mounting plate. The sealing sections can have holes that are adapted to the geometry of the fixing bolts, allowing the bolts to pass through the holes and thus fixing the sealing sections to the mounting plate. For pre-assembly, the shrink element or...The shrink elements can already be positioned on the end regions of the sealing sections, so that the sealing assembly already has its final geometric shape, but the shrink elements have not yet been shrunk onto the end regions of the sealing sections. It is therefore possible that the mounting plate has sufficient space for the entire pre-assembled sealing assembly, or it is possible that different sections of the pre-assembled sealing assembly are completed successively on the mounting plate.

[0029] The sealing assembly can be positioned entirely on the top of the mounting plate, allowing the shrink elements to be heated from above without any issues. However, the recesses also allow for heating from below, ensuring uniform heating and shrinkage. Multiple heat sources can be used to heat the shrink element(s) simultaneously from above and below, or a single, movable heat source can be used to alternately heat the shrink element(s) from above and below. The recess can be adapted to the position of the shrink elements. It is advantageous to have multiple recesses so that each connection point of the sealing sections or each shrink element can be heated from both sides.Advantageously, the entire pre-assembled sealing assembly can be easily finalized by shrinking the shrink elements onto it. After shrinking and the resulting secure connection between the sealing sections, the entire sealing assembly can be removed from the mounting plate and then used to seal the two components.

[0030] According to an advantageous embodiment of the invention, the connecting element is designed as an adhesive strip. The adhesive strip can be affixed to the two end regions to join them, thus preventing relative movement between the two end regions. The adhesive strip can be self-adhesive, which simplifies the joining process. Alternatively, the end regions can first be provided with an adhesive layer, and the adhesive strip can then be applied to this adhesive layer.

[0031] The adhesive strip can advantageously be made of PVC. PVC is characterized by both good stability at low thickness and a certain degree of elasticity. Furthermore, PVC exhibits high temperature resistance and can be used for sealing against a wide variety of fluids. The importance of thickness is explained in more detail below. Alternatively, the adhesive strip can also be designed as a foam adhesive strip. Such a foam adhesive strip may be thicker than a strip made of a non-foamed material; however, a foamed material is characterized by greater flexibility, allowing it to compensate for surface irregularities or a high degree of surface roughness on the components, thus preventing leaks at the contact point between the component and the adhesive strip. Polyethylene, for example, is a suitable material.

[0032] To achieve sufficient adhesion, it has proven advantageous for the adhesive strip to have a silicone adhesive layer. Silicone exhibits sufficient adhesive strength on various substrates and, in particular, on the material of the sealing section. Furthermore, the use of silicone, due to its good chemical compatibility, allows the bonding agent or adhesive strip to be used in a wide range of applications. In addition, silicone can be removed from the bonded surface relatively easily and without leaving any residue. The adhesive strip can be coated with the adhesive layer on only one side, so that the outer side of the strip, i.e., the side that comes into contact with the component during application, does not adhere to the component. Furthermore, the adhesive strip can be rolled up before use or before being applied to the end sections, which facilitates easy transport.

[0033] To prevent leaks caused by the adhesive strip, it is advantageously designed to be very thin. Reference is also made to the above statements regarding the thickness of the heat shrink tubing, which is also advantageously designed to be as thin as possible. Nevertheless, sufficient mechanical stability of the adhesive strip must also be ensured so that it does not tear during application and reliably connects the two end sections.

[0034] With regard to the thickness of the adhesive film, it has proven advantageous for it to be less than the thickness of the sealing section. In particular, the thickness of the adhesive film is less than twice, preferably more than five times, especially preferably more than ten times, and most preferably more than twenty times, than the thickness of the sealing section. The thickness of the sealing section refers to the thickness of the compressed sealing section, which will be explained in more detail below. Advantageously, the thickness of the adhesive film is less than 1 mm, preferably less than 0.5 mm, especially preferably less than 0.2 mm, and most preferably less than 0.1 mm. Adhesive films with a thickness of 0.09 mm have proven particularly effective.

[0035] According to a further advantageous embodiment of the invention, the adhesive strip forms a laterally projecting overhang compared to the end regions, with the adhesive strip being adhered to itself in the area of ​​the overhang. The adhesive strip can thus be wrapped once around the two end regions to be joined and then adhered to itself laterally in the area of ​​the overhang. That is, the two ends of the adhesive strip can be adhered to each other. The two sides of the adhesive strip provided with the adhesive film can be adhered to each other, so that there is no risk of the components coming into contact with the adhesive film. The length of the adhesive strip advantageously corresponds to the circumference of the end regions plus twice the length of the overhang.

[0036] Alternatively, it may sometimes suffice if the adhesive strip is shorter than the circumference of the end area. The adhesive strip then cannot extend around the entire end area, so the ends of the adhesive strip do not touch and a certain gap remains between them. Provided that a sufficient connection between the two end areas can still be ensured with such a shorter adhesive strip, this design can lead to an overall reduction in adhesive strip consumption.

[0037] To produce a sealing arrangement of the type described above, a manufacturing process is described below in which the adjacent end areas are joined together using an adhesive strip.

[0038] In this process, at least one sealing section with two end sections is provided, and optionally, another sealing section with two end sections is added. An adhesive strip is also provided, which has been pre-cut to the appropriate length, for example, by trimming. The two end sections to be joined are then positioned so that they abut each other. The two end sections can simply touch and rest against each other. Alternatively, the two end sections can interlock in a form-fitting manner, as will be explained in more detail below. To join and secure the two end sections, the adhesive strip is then applied to them. This method fixes and joins the two end sections together.The adhesive strip can be bonded to both end areas during application and extend across the seam located between the end areas.

[0039] It has proven particularly advantageous to first position the adhesive strip on a mounting plate, with the adhesive film facing away from the mounting plate so that it does not stick to the plate. In a subsequent step, the two end sections can then be placed on the adhesive strip, positioning the strip between the end sections and the mounting plate. The adhesive strip can run perpendicular to the longitudinal direction of the sealing sections and can protrude from both sides of the sealing sections or end sections. By placing the end sections on the adhesive strip, the strip can be bonded to them from below via the adhesive film.

[0040] In the next step, the protruding part of the adhesive strip can be folded upwards so that it lies against the sides of the end sections. Then, the adhesive strip can be folded over the top of the end sections, so that it is now applied to both the top and bottom surfaces. Finally, by trimming off the excess adhesive strip, the two end sections can be reliably joined.

[0041] However, it is also possible to stick the folded end of the adhesive strip to the other end of the adhesive strip, creating a lateral overhang in which the ends of the adhesive strip protrude laterally from the end areas. This design allows the end areas to be covered and connected circumferentially with the adhesive strip.

[0042] The individual steps can be carried out manually or by machine. It is possible to cut the adhesive strip to the desired length beforehand, or to cut it only after the two end sections have been joined.

[0043] Regarding the connection of the end sections, it has proven advantageous for each adjacent end section to have at least one connecting section, wherein at least one connecting section of one end section is connected to a connecting section of an adjacent end section. It is thus possible for the end sections to be connected to each other via the connecting sections, even independently of the connecting element. Nevertheless, the additional connecting element can reinforce the overall connection between the two end sections and ensure that the two connecting sections cannot unintentionally detach from each other. The sealing sections can be connected via the connecting sections to form a continuous sealing assembly.

[0044] To achieve a reliable connection, it has proven advantageous for the connecting sections of the adjacent end areas to be designed to be complementary in shape. This complementary design prevents the end areas from slipping during assembly. It also ensures that the end areas do not slip when the fastener is applied. The complementary design allows the end areas to be positively locked together, preventing one end area from moving independently of the other. However, this positive locking connection does not necessarily have to be present in all spatial directions. For example...It may be designed so that one connecting section projects at least partially into the other connecting section, preventing the two end sections from moving relative to each other in a transverse direction to the longitudinal direction of the sealing sections. However, relative movement in the longitudinal direction of the sealing sections may still be possible. In simplified terms, the connecting sections can be designed such that the two end sections can still pull apart, but cannot move relative to each other in a transverse direction. One connecting section can be designed as a male connecting section, and the connecting section connected to it as a female connecting section.

[0045] According to an advantageous embodiment of the invention, the connecting sections of the adjacent end regions interlock like puzzle pieces. Such interlocking ensures a reliable connection. One of the connecting sections may have an undercut into which the other connecting section can engage. This design ensures that the end regions are also positively connected to each other in the longitudinal direction of the sealing sections, thus preventing any relative movement in the longitudinal direction.

[0046] However, the two connecting sections can separate again if one connecting section is lifted relative to the other. This is because the two connecting sections can then disengage. Such movement can, however, be prevented by the connecting element.

[0047] To further improve the connection between two end regions, it has proven advantageous for each adjacent end region to have two connecting sections, which are linked to form a first pair of connecting sections and a second pair of connecting sections with complementary connecting sections. In this way, two adjacent end regions can be positively connected to each other at two points: by the first pair of connecting sections and by the second pair of connecting sections. Advantageously, each end region can have a male connecting section and a female connecting section, which can then engage with complementary connecting sections of the adjacent end region. It can also be provided that two connecting sections forming a connecting section pair create a puzzle connection.The corresponding connecting sections can therefore be designed as puzzle pieces. Furthermore, the connecting sections of both pairs of connecting sections can also form a puzzle connection.

[0048] In this context, it has proven advantageous for the two connecting sections of an end region to be arranged at an angle to each other, particularly at right angles. This design allows the connecting sections, or pairs of connecting sections, to absorb forces from different directions, thereby improving the hold and reducing the risk of unintentional separation of the connected end regions. One connecting section can be arranged transversely to the longitudinal direction of the sealing sections, and another connecting section can extend parallel to the longitudinal direction of the sealing sections. The two interconnected connecting sections arranged transversely to the longitudinal direction can be located on the facing sides of the respective end regions. The longitudinal direction of the interconnected sealing sections can, in particular transversely, run through the two connecting sections.

[0049] Furthermore, it has proven advantageous if one of the connecting sections has a recess extending transversely to the longitudinal direction of the sealing section. Advantageously, another connecting section has a projection extending transversely to the longitudinal axis of the sealing section. The projection can engage in the recess to connect the two connecting sections. The projection and the recess allow the two connecting sections, and thus also the two end regions of the sealing sections, to be positively connected. The recess and the projection can be designed to be complementary in shape, particularly like interlocking puzzle pieces.Furthermore, the projection and the recess can be designed such that the two sealing sections cannot move either longitudinally or transversely when the two connecting sections are joined. Separation of the connected sections is advantageously only possible if one of the two end regions is lifted, thus disengaging the two connecting sections. Such movement is not possible during use of the sealing sections due to the components compressing the seal. Advantageously, the two connecting sections, or the projection and the recess, form a dovetail joint that prevents transverse movement. For this purpose, the projection can be widened transversely to the longitudinal direction, and the recess can be correspondingly narrowed transversely to the longitudinal direction.In the area of ​​the connecting section with the recess, the end region of the sealing section can be wider than the end region containing the connecting section with the projection. This allows the laterally projecting projection to be accommodated in the recess.

[0050] Furthermore, it has proven advantageous if one of the connecting sections positively engages another connecting section. The connecting section arranged parallel to the longitudinal direction of the sealing section can positively engage the connecting section of the other end region, which is also arranged parallel to the longitudinal direction of the sealing section, particularly laterally. This allows a connection between the end regions to be achieved that lies outside the longitudinal direction of the sealing sections. That is, the longitudinal direction can extend parallel to both connecting sections. Certain forces can be absorbed particularly well with this design, thus improving the stability of the connection between the two end regions. It can also be provided that one connecting section engages transversely to the longitudinal direction of the sealing sections in the contour of the other end region or the connecting section.The connecting sections, designed like puzzle pieces, can thus extend transversely to the longitudinal direction of the sealing sections.

[0051] Regarding the design of the sealing sections, it has proven advantageous for one of the sealing sections to be configured as a corner sealing section and at least one as a linear sealing section. Depending on the geometric requirements, the different sealing section types allow for the combination of multiple corner sealing sections and multiple linear sealing sections to form a sealing arrangement. Advantageously, four corner sealing sections are provided, each connected to one or more linear sealing sections to form a rectangular sealing arrangement. Therefore, at least four linear sealing sections can also be provided. The various sealing sections can form a set and be combined as required, depending on the necessary dimensions.The linear sealing sections and the corner sealing sections can each be designed as identical parts, which reduces complexity and thus overall costs. The sealing sections can be equipped with complementary connecting sections at their ends, allowing each sealing section to connect to any other sealing section. For example, if one end of a sealing section has a male connecting section, the other end of the same sealing section can have a female connecting section. Furthermore, it has proven advantageous for the sealing sections to have a metal core, particularly made of spring steel, and a surrounding jacket, particularly made of rubber. The core can provide the sealing section(s) with sufficient stability while also offering a degree of spring action. In this respect, spring steel has proven particularly effective in practice.The material encasing the core provides the actual sealing effect and can therefore come into contact with the components to be sealed. To ensure a good seal, the material encasing the core can be softer than the core itself, allowing it to conform to the shape of both components. Rubber, especially foamed rubber, has proven advantageous in this regard. Alternatively, plastics, particularly foamed plastics, can also be used.

[0052] According to an advantageous embodiment of the invention, the sealing sections have a cross-section comprising a first leg, a second leg, and an intermediate section offset from the two legs. The two legs can lie in the same plane and contact one of the two components, while the intermediate section can contact the other component. This design allows a certain contact force to be exerted by the sealing sections on the two components, thus improving the sealing effect. The intermediate section can be arranged perpendicular to the longitudinal direction of the sealing sections. Overall, the sealing sections can have a bridge-like cross-section. The two legs can preferably be connected to the intermediate section via inclined connecting areas.This design allows the sealing sections to exhibit a certain spring effect and deform when the two components are compressed. The two legs and the intermediate section can move towards each other. Overall, the sealing arrangement, or the sealing sections themselves, can be designed as a flat gasket. In the installed state, the sealing sections may be deformed into a substantially flat geometry by the components.

[0053] Further details and advantages of the invention will be explained in more detail below with reference to the accompanying drawings. These show:

[0054] Fig. 1 several process steps for joining two end areas of a sealing section by means of a connecting element designed as a shrink element;

[0055] Fig. 2 shows a schematic longitudinal section through the two interconnected sealing sections;

[0056] Fig. 3 shows a mounting plate with several sealing sections;

[0057] Fig. 4 shows a schematic cross-section of a sealing section;

[0058] Fig. 5 shows a sealing section designed as a corner sealing section; Fig. 6 shows a sealing section designed as a linear sealing section;

[0059] Fig. 7 shows two sealing sections that are connected to each other via a connecting element designed as an adhesive strip;

[0060] Fig. 8 schematic cross-sectional views through an end area;

[0061] Fig. 9 shows several sealing sections connected to form a sealing arrangement.

[0062] To seal two components against each other, gaskets are used that are compressed by the two components, thereby achieving a sealing effect. Figure 9 shows a corresponding gasket in the form of a sealing assembly 10, which consists of several interconnected sealing sections 1.1, 1.2. These sealing sections 1.1, 1.2 can be connected to each other in a modular manner, so that geometrically different shaped and differently sized sealing assemblies 10 can be produced from the sealing sections 1.1, 1.2. To prevent the several sealing sections 1.1, 1.2 from slipping and thus from leaking, it is important that they are reliably held in position. The sealing sections 1.1, 1.2 must therefore be connected to each other so firmly that as little fluid as possible passes through the interfaces 5 between two adjacent sealing sections 1.1, 1.2.The following section will focus in particular on various connection options that can minimize leakage, especially in the area of ​​the seams 5.

[0063] Figure 1 illustrates various steps in the process of connecting two sealing sections 1.1 and 1.2. Each sealing section 1.1 and 1.2 has two end regions 2.1 and 2.2, indicated by dashed lines. The illustration also shows that the sealing sections 1.1 and 1.2 have complementary contours at their ends, or rather, each sealing section 1.1 and 1.2 has a connecting section 3.1 at its end, and these two connecting sections 3.1 are complementary in shape, allowing them to interlock. For example, the right sealing section 1.2 has a male connecting section 3.1, and the left sealing section 1.1 has a female connecting section 3.1.

[0064] To hold the end sections 2.1 and 2.2 in position and prevent them from moving relative to each other, a connecting element 6 is provided, which in the embodiment shown in Fig. 1 is designed as a heat-shrink tube. This heat-shrink tube, open at both ends and therefore cylindrical in shape, is first pulled over the end section 2.1 of the right sealing section 1.1, as shown in the upper illustration of Fig. 1. The diameter of the heat-shrink tube is slightly larger than the circumference of the end section 2.1, so that the heat-shrink tube sits loosely on the corresponding end section 2.1. The length of the heat-shrink tube is approximately twice as long as the end section 2.1, so that it protrudes about half its length from the end section 2.1. This can also be seen in the second illustration of Fig. 1.

[0065] In the next step, the end section 2.2 of the other sealing section 1.2 is inserted into the open end that protrudes from the first sealing section 1.1 until the two sealing sections 1.1 and 1.2 touch and the two end sections 2.1 and 2.2 are abutting each other. The complementary sealing sections 1.1 and 1.2 then lie against each other, and due to the geometry of the ends, the seam 5 does not run in a straight line from one side to the other, but rather has a specific shape corresponding to the complementary ends.

[0066] The third illustration in Fig. 1 shows how the two end sections 2.1, 2.2 protrude into the heat shrink tubing to approximately equal proportions, so that the heat shrink tubing covers the seam 5 between the sealing sections 1.1, 1.2. Initially, the connection between the sealing sections 1.1, 1.2 and the heat shrink tubing is still quite loose, and the sealing sections 1.1, 1.2 can therefore be moved both longitudinally L and to a certain extent transversely to it. The sealing sections 1.1, 1.2 are thus in contact with each other, but are not yet firmly connected.

[0067] The heat shrink tubing is then heated, causing it to contract and conform tightly to the contours of the two end sections 2.1, 2.2. This can be seen in the bottom image of Fig. 1. The heat shrink tubing no longer protrudes from the contours of the end sections 2.1, 2.2, but is shrunk onto them and fits snugly. The heat shrink tubing consists of a film only a few tenths of a millimeter thick, so the outer circumference does not increase, or only minimally, and a reliable seal is maintained. If the film were too thick, a small channel could form at the ends of the heat shrink tubing, allowing fluid to flow back and forth between the components perpendicular to the longitudinal direction L of the sealing sections 1.1, 1.2.On the other hand, the shrink tubing must not be too thin, as it could otherwise tear more easily, and the two sealing sections 1.1, 1.2 or their end areas 2.1, 2.2 would not be sufficiently firmly connected to each other.

[0068] To improve the connection between end regions 2.1, 2.2 and the connecting element 6 or the heat shrink tubing, end regions 2.1, 2.2 each have a profiled contour 7. The profiled contour 7 has a kind of wave-like pattern against which the heat shrink tubing can conform after shrinking. Thus, not only is a force-fit or friction-fit connection created between end regions 2.1, 2.2 and the heat shrink tubing, but because the shrunk-on heat shrink tubing engages in the profiled contour 7, it is also at least partially form-fit with end regions 2.1, 2.2.

[0069] Figure 3 shows a mounting plate 8, which holds the individual sealing sections 1.1, 1.2 in position when they are connected to each other via the connecting element 6. The mounting plate 8 has a cuboid geometry and is adapted to the size of the sealing assembly 10. On its upper surface, the mounting plate 8 has several fixing bolts 8.1, which have a cylindrical cross-section and extend vertically upwards from the upper surface. The sealing sections 1.1, 1.2 each have corresponding recesses in the form of bores through which the fixing bolts 8.1 can extend, so that the sealing sections 1.1, 1.2 are arranged immovably on the mounting plate 8 with respect to the fixing bolts 8.1 in the radial direction. As can be seen from a comparison of the representation in Fig. 3 with the third and fourth representations in Fig. 1, the connecting element 6 orThe heat shrink tubing has not yet shrunk onto the end regions 2.1, 2.2 and therefore, in the top view according to Fig. 3, it still has a slightly greater width than the end regions 2.1, 2.2. Furthermore, it can be seen that the mounting plate 8 has a recess 8.2 over which the heat shrink tubing extends. This recess has an essentially L-shaped geometry, so that both heat shrink tubes are accessible not only from the top of the mounting plate 8, but also simultaneously from the underside of the mounting plate 8. This circumferential access makes it possible to heat the heat shrink tubing(s) uniformly around their circumference, thus ensuring that the heat shrink tubing engages evenly with the profiled contour 7 during shrinking.

[0070] Figure 2 shows a longitudinal section through the two interconnected sealing sections 1.1, 1.2. The two sealing sections 1.1, 1.2 are abutting each other at their ends, and the remaining seam 5 between them is visible. The connecting element 6 and the heat shrink tubing, respectively, are visible on both the top and bottom surfaces. However, the dimensions are not to scale; the thickness Ds of the heat shrink tubing is significantly smaller than the thickness Dd of the two sealing sections 1.1, 1.2.

[0071] Figure 4 shows a cross-section through one of the sealing sections 1.1. In the longitudinal direction L of the sealing sections 1.1 and 1.2, these sections have a homogeneous shape. It can be seen that the sealing section 1.1 is not flat, or rather, does not necessarily have to be flat; instead, the depicted sealing section 1.1 has a bridge-like geometry. Specifically, the sealing section 1.1 has two legs 1.3 arranged apart from each other and lying in the same plane. Between these legs 1.3, an intermediate element 1.4 is arranged, offset from the legs 1.3. This intermediate element 1.4 is connected to each of the legs 1.3 at both its sides via inclined connecting areas 1.5. In operation, the two legs 1.3 rest against one of the two components, and the intermediate element 1.4 rests against the other component. As can be clearly imagined from the illustration in Fig. 4, the sealing section 1 acts.When the two components are pressed together, the sealing section 1.1, due to its design, acts like a spring, creating a surface pressure between one component and the legs 1.3, as well as between the intermediate section 1.4 and the other component. This pressure ultimately ensures a sealing effect. If the contact force of the components is sufficient, the sealing section 1.1 is flattened so that the two legs 1.3 and the intermediate section 1.4 lie in the same plane. Furthermore, as can be seen in Fig. 4, the cross-section of the sealing section 1.1 is not homogeneous. Rather, the sealing section 1.1 has a core, which is indicated by a thick black line. This core is made of spring steel and provides the spring action of the sealing section 1.1 described above.The core is encased in a sealing material, specifically a foamed rubber, which comes into contact with the two components and provides the seal. This sealing material is able to conform to the components, thereby achieving a good seal. Furthermore, the sealing material is sufficiently soft so that the connecting element 5 cannot negatively affect the seal. Rather, the thickness Ds of the shrink tubing or the thickness Dk of the adhesive strip, which will be described in more detail below, is so thin that the elasticity of the connecting element 5 can compensate for the corresponding thickness Ds / Dk of the connecting element 5.

[0072] The further illustrations in Figures 5 to 9 now show sealing sections 1.1, 1.2 whose end regions 2.1, 2.2 differ from the sealing sections 1.1, 1.2 described above. However, the remaining above statements also apply to the sealing sections 1.1, 1.2 shown in Figures 5 to 9.

[0073] The illustration in Fig. 5 shows a sealing section 1.2 designed as a corner sealing section, very similar to the one shown in Fig. 3. The sealing section 1.2 has two end sections 2.1, 2.2 arranged at right angles to each other. However, unlike the sealing sections 1.1, 1.2 described with regard to Figs. 1 and 3, this sealing section has not just one connecting section 3.1, but two connecting sections 3.1, 3.2 at its end. The first connecting section 3.1 is designed very similarly to the connecting section 3.1 of the sealing sections 1.1, 1.2 shown in Figs. 1 and 3. The second connecting section 3.2 is designed somewhat more complexly and resembles a puzzle piece.

[0074] The illustration in Fig. 6 shows a sealing section 1.1 designed as a linear sealing section, in which the two end regions 2.1, 2.2 are aligned. As can be seen when comparing the illustrations in Figs. 5 and 6, the two end regions 2.1, 2.2, or the connecting sections 3.1, 3.2, are adapted to one another and designed to be complementary in form, such that the two sealing sections 1.1, 1.2 can be positively connected to each other. The illustration in Fig. 9 shows a sealing arrangement 10, which is composed of several of the sealing sections 1.1 and 1.2 shown in the illustrations in Figs. 5 and 6. The sealing sections 1.1, 1.2 are arranged such that the adjacent end regions 2.1, 2.1 are complementary in form and thus fit together.

[0075] In contrast to the first connecting section 3.1, the second connecting section 3.2 lies off the longitudinal direction L of the sealing sections 1.1, 1.2, as can be seen in the illustrations of Figs. 5 and 6. Rather, connecting section 3.1 extends parallel to the longitudinal direction L of the sealing sections 1.1, 1.2, and connecting section 3.2 of the end region 2.2 encompasses connecting section 3.2 of the end region 2.1.

[0076] The male part of the connecting section 3.2 is designed as a projection 3.3 extending transversely to the longitudinal direction L of the sealing section 1.1, 1.2, and the female part of the connecting section 3.2 is designed as a correspondingly shaped recess, which also extends transversely to the longitudinal direction L of the sealing section 1.1, 1.2. The projection 3.3 and the recess 3.4 are shown in Figures 5 and 6. The projection 3.3 and the recess 3.4 form a puzzle connection designed such that the two end regions 2.1, 2.2 are not movable relative to each other, either in the longitudinal direction L or transversely thereto. The two first connecting sections 3.1, which are also used in the embodiment according to Figures 1 and 3, cannot, however, prevent any relative movement in the longitudinal direction of the sealing sections 1.1, 1.2. This means that the sealing sections 1.1, 1.2 can be used despite these interconnected connecting sections 3.1. The sections can be pulled apart further. However, the first connecting sections 3.1 ensure that relative lateral movement is prevented. The end region 2.1, 2.2, in which the recess 3.4 is arranged, is wider than the central part of the sealing section 1.1, 1.2 located between the two end regions 2.1, 2.2, so that the recess 3.4 is laterally offset and can encompass the projection 3.3.

[0077] The interlocking first connecting sections 3.1 form a first pair of connecting sections 4.1, and the second connecting sections 3.2 form a second pair of connecting sections 4.2, as illustrated in Fig. 9. The forces acting can be transmitted from the two pairs of connecting sections 4.1,

[0078] 4.2, and due to the double connection of the sealing sections 1.1, 1.2 and the end sections 2.1, 2.2, a very stable connection is achieved. Although there is no risk of the connection loosening again during operation due to the contact force of the two components, an unintentional separation of the two components can occur, especially during assembly, which can ultimately have a negative impact on the sealing effect. This is because if one sealing section 1.1, 1.2 is lifted relative to another sealing section 1.1, 1.2, the connection can be loosened, regardless of whether the sealing sections 1.1, 1.2 are connected to each other via one pair of connecting sections 4.1 or via two pairs of connecting sections 4.1, 4.2.

[0079] To prevent this, a connecting element 6 in the form of an adhesive strip can be used, as shown in Figures 7, 8, and 9. The function of the adhesive strip is fundamentally similar to that of the heat shrink tubing, and it ensures that the interconnected sealing sections 1.1,

[0080] 1.2 and their end sections 2.1, 2.2 cannot move unintentionally relative to each other and therefore cannot be separated. If the sealing sections 1.1, 1.2 are to be separated, the connecting elements 6 must first be loosened or removed. However, this is not required for either the heat shrink tubing or the adhesive strip, so they permanently and reliably connect the sealing sections 1.1, 1.2. The adhesive strip shown in Fig. 7 is approximately as wide as the two end sections 2.1, 2.2, allowing them to be connected via the adhesive strip. The adhesive strip is provided with an adhesive layer on one side, which is used to adhere it to the two end sections 2.1, 2.2, creating a material-bonded connection between the adhesive strip and the two end sections 2.1, 2.2.

[0081] Specifically, the two sealing sections 1.1, 1.2 can initially be connected to each other via the connecting section(s) 3.1, 3.2 in the manner described above. The connecting sections 3.1, 3.2 interlock to form two pairs of connecting sections 4.1, 4.2, as can be seen in the upper illustration of Fig. 7. However, it is still possible to separate the two sealing sections 1.1, 1.2 by lifting them apart. To prevent this, an adhesive strip is placed under the end regions 3.1, 3.2, either after the connecting sections 3.1, 3.2 have been joined together, or the adhesive strip is first attached to the first end region 2.1 with a certain overhang, and then the other end region 2.2 is attached to the first end region 2.1, simultaneously coming into contact with the adhesive strip.

[0082] The adhesive strip is then folded over onto the upper side of the end regions 2.1 and 2.2. This can be seen, for example, in the cutaway cross-sectional view of Fig. 8. Depending on the length of the adhesive strip, the ends of the strip cannot touch each other, as can be seen in the right-hand illustration of Fig. 8. This means that a certain gap remains between the ends of the adhesive strip. However, due to the adhesive effect and the comparatively large adhesive surface, a sufficient bond can still be ensured by the adhesive strip even in this configuration.

[0083] Alternatively, the adhesive strip can also be longer, in particular longer than the circumference of the end regions 2.1, 2.2, as can be seen in the right-hand illustration of Fig. 8. It is not intended that the adhesive strip be wrapped multiple times around the end regions 2.1, 2.2, as this could lead to a comparatively large height difference in and around the end regions 2.1, 2.2, creating a risk of leaks or crossflows across the sealing sections 1.1, 1.2. Instead, the ends of the adhesive strip are glued together, resulting in a lateral overhang 6.1. This lateral overhang 6.1 can be seen in the right-hand illustration of Fig. 8. It can also be seen that the adhesive strip has a certain distance from the sealing section 1.1, 1.2 at its right edge.This distance is only for better illustration and ideally the adhesive strip is bonded to the sealing section 1.1, 1.2 as completely as possible around its circumference.

[0084] The adhesive strip prevents the two end sections 2.1 and 2.2 from being separated. In addition to the positive connection via the connecting sections 3.1 and 3.2, they are also bonded by the adhesive strip. The thickness of the adhesive strip is the same as that of the heat shrink tubing. Figure 8 illustrates that the adhesive strip should be as thin as possible to prevent leaks, as explained above. At the same time, sufficient strength must be ensured to prevent the adhesive strip from tearing. For example, an adhesive strip with a thickness of approximately 0.09 mm can be used. Figure 2 and the explanations above apply to both the thickness Ds of the heat shrink tubing and the thickness Dk of the adhesive strip.

[0085] The bonding of the two end sections 2.1, 2.2 via the adhesive strip can be carried out manually or automatically. Analogous to the mounting plate 8 according to Fig. 3, a mounting plate can be provided on which the sealing sections 1.1, 1.2 are placed. Preferably, the sealing sections 1.1, 1.2 with their already connected or interlocking end sections 2.1, 2.2 are placed on an adhesive strip arranged on the mounting plate, and the adhesive strip can then be folded around the end sections 2.1, 2.2 using a suitable tool, so that it is either completely bonded to the end sections 2.1, 2.2, forming an overhang 6.1 as shown on the right-hand side of Fig. 8, or at least partially bonded circumferentially to the end sections 2.1, 2.2.

[0086] Furthermore, the configurations of the sealing sections 1.1, 1.2 and the end regions 2.1, 2.2 described above can be combined with the various connecting elements 6. Therefore, it is not only possible to connect the sealing sections 1.1, 1.2 shown in Figures 1 and 3 using adhesive tape, but also to use heat-shrink tubing for the sealing sections 1.1, 1.2 as shown in Figures 5 and 6. Additionally, sealing sections 1.1, 1.2 with different end regions 2.1, 2.2 can be used in the sealing arrangement 10. This means that the sealing sections 1.1, 1.2 as shown in Figures 1 and 3, as well as in Figures 5 and 6, can sometimes be mixed, as can the various connecting elements 6.

[0087] REFERENCE MARK LIST

[0088] 1.1 Sealing section

[0089] 1.2 Sealing section

[0090] 1.3 Thighs

[0091] 1.4 Intermediate section

[0092] 1.5 Connection area

[0093] 2.1 first end area

[0094] 2.2 second end area

[0095] 3.1 First connection section

[0096] 3.2 second connecting section

[0097] 3.3 lead

[0098] 3.4 Exclusion

[0099] 4.1 Pair of connecting sections

[0100] 4.2 Pair of connecting sections

[0101] 5. Seam

[0102] 6 Fasteners

[0103] 6.1 Overhang

[0104] 7 profiled contour

[0105] 8 Mounting plate

[0106] 8.1 Fixing bolts

[0107] 8.2 Exclusion

[0108] 10 Sealing arrangement

[0109] Dd thickness of the sealing section

[0110] Dk thickness of the adhesive strip

[0111] The thickness of the shrink element

[0112] L Longitudinal direction

Claims

PATENT CLAIMS 1. Sealing arrangement for sealing a housing, in particular a battery housing, with at least one sealing section (1.1, 1.2) which has two end regions (2.1, 2.2) arranged at the ends, wherein either the two end regions (2.1, 2.2) of the sealing section (1.1, 1.2) abut each other or wherein the end regions (2.1, 2.2) of the sealing section (1.1, 1.2) abut each of the end regions (2.1, 2.2) of adjacent sealing sections (1.1, 1.2), characterized in that at least two of the abutting end regions (2.1, 2.2) are connected to each other via a connecting element (6) covering the seam (5) arranged between the two end regions (2.1, 2.2).

2. Sealing arrangement according to claim 1, characterized in that the connecting means (6) is connected to at least one of the two adjacent end regions (2.1, 2.2) by force and / or material connection.

3. Sealing arrangement according to one of claims 1 or 2, characterized in that the connecting element (6) is designed as an adhesive strip.

4. Sealing arrangement according to claim 3, characterized in that the adhesive strip is designed as a PVC strip.

5. Sealing arrangement according to one of claims 3 or 4, characterized in that the adhesive strip is designed as an adhesive foam strip.

6. Sealing arrangement according to one of claims 3 to 5, characterized in that the adhesive strip has an adhesive layer made of silicone.

7. Sealing arrangement according to one of claims 3 to 6, characterized in that the thickness (Dk) of the adhesive strip is less than the thickness (Dd) of the sealing section (1.1, 1.2) by a factor of 2, preferably by a factor of 5, more preferably by a factor of 10, and most preferably by a factor of 20.

8. Sealing arrangement according to one of claims 3 to 7, characterized in that the adhesive strip forms a laterally projecting protrusion (6.1) relative to the end regions (2.1, 2.2), wherein the adhesive strip is adhered to itself in the area of ​​the protrusion (6.1).

9. Sealing arrangement according to one of the preceding claims, characterized in that the adjacent end regions (2.1, 2.2) each have at least one connecting section (3.1, 3.2), wherein at least one connecting section (3.1, 3.2) of an end region (2.1, 2.2) is connected to a connecting section (3.1, 3.2) of an adjacent end region (2.1, 2.2), wherein the connected connecting sections (3.1, 3.2) are designed to be complementary in form to each other.

10. Sealing arrangement according to claim 9, characterized in that the connecting sections (3.1, 3.2) of the adjacent end regions (2.1, 2.2) interlock in the manner of puzzle pieces.

11. Sealing arrangement according to one of the preceding claims, characterized in that the adjacent end regions (2.1, 2.2) each have two connecting sections (3.1, 3.2) which are connected to form a first pair of connecting sections (4.1) and a second pair of connecting sections (4.2) with complementary connecting sections (3.1, 3.2).

12. Sealing arrangement according to claim 11, characterized in that the two connecting sections (3.1, 3.2) of an end region (2.1, 2.2) are arranged at an angle, in particular at right angles, to each other.

13. Sealing arrangement according to one of claims 11 or 12, characterized in that one of the connecting sections (3.1, 3.2) has a recess (3.4) extending transversely to the longitudinal direction (L) of the sealing section (1.1, 1.2) and another connecting section (3.1, 3.2) has a projection (3.3) extending transversely to the longitudinal axis (L) of the sealing section (3.1, 3.2), wherein the projection (3.3) engages in the recess (3.4) to connect the connecting sections (3.1, 3.2).

14. Sealing arrangement according to one of the preceding claims, characterized in that at least one of the sealing sections (1.1, 1.2) is designed as a corner sealing section and at least one sealing section (1.1, 1.2) is designed as a linear sealing section.

15. Method for manufacturing a sealing arrangement (10), in particular a sealing arrangement (10) according to claim 1, comprising the following steps: Providing at least one sealing section (1.1, 1.2) with two end-side arranged end areas (2.1, 2.2); Optional provision of a second sealing section (1.1, 1.2) with two end-side arranged end areas (2.1, 2.2); Providing adhesive tape; Positioning the two end areas to be joined (2.1, 2.2) so that they are adjacent to each other; Apply the adhesive strip to the two end areas (2.1, 2.2).

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