DE102019124061B3 - Battery case with a spacer - Google Patents

Abstract

A battery housing 1 for a motor vehicle is disclosed, comprising a base part with a base plate 8 and a cover part with a cover plate 3, the base part and the cover part delimiting a receiving volume for receiving at least one battery module, and the two plates 3, 8 being provided by at least one inside of the receiving volume, spacers 10 supported on both plates 3, 8 are spaced apart. In the area of at least one support, the corresponding plate 3, 8 has an opening. The spacer 10 has an insertion section 12 which protrudes into the opening 11 and is fastened to this plate 3, 8. The plug-in section 12 protrudes into the opening 11 at the most so far that its end surface 13 is flush with the outside 14 of the plate 8.

Description

The invention relates to a battery housing for a motor vehicle, comprising a base part with a base plate and a cover part with a cover plate, the base part and the cover part delimiting a receiving volume for receiving at least one battery module and wherein the two plates are connected by at least one arranged within the receiving volume spacers supporting the two plates are spaced apart and the respective plate has an opening in the region of at least one support, the spacer having an insertion section which protrudes into the opening and the spacer is attached to this plate and the insertion section is at most as far into the opening protrudes so that its end surface is flush with the outside of the plate.

Battery housings are used for electric vehicles and hybrid vehicles in order to accommodate batteries or battery modules that are required to electrically drive the vehicle. Such batteries are typically powerful batteries and are divided into several modules. Due to the high energy density, special safety standards must be observed with regard to the fastening of the battery housing to the motor vehicle and the strength and rigidity of the battery housing. The requirements in this regard are quite considerable, especially in view of the weight of 700 kg to be carried.

Due to their high weight, the battery modules are preferably arranged in the underfloor area of a motor vehicle, a flat arrangement being preferred for even weight distribution in order not to impair the driving behavior of a vehicle. In such an arrangement, a plurality of battery modules are arranged next to one another in a flat configuration. In many cases, the battery housing takes up a large part of the underfloor area of a motor vehicle.

Such a battery housing is composed of a base part and a cover part. Both parts each comprise a plate that represents the base areas of the battery housing and determines the two-dimensional extent of the receiving volume of the battery volume. Both plates are connected to one another at their edges via side walls, it being possible for these side walls to be part of the base part and / or the cover part. Such a plate carrying side walls forms a trough. The tub structure can be provided by reshaping a circuit board and thus in one piece. In other configurations, the tub is composed of the plate and a frame profile, typically made of extruded profiles. Both parts - bottom part and cover part - are connected to one another in a circumferential sealing manner, for example via a screw connection or by gluing the two parts together. For the purpose of the connection, these often have a circumferential, outward-facing mounting flange. The seal is typically gas, water and dust tight.

The battery housing, assembled from the bottom part and the cover part, encloses a receiving volume in which battery modules can be received. This receiving volume is limited by the inside surfaces of the base plate, the cover plate and the side walls.

Against the background of the high weight of the battery modules, the typically large area of the battery housing and the requirement for rigidity of the battery housing, it is sometimes necessary to support the base plate against the cover plate and to brace the two plates against each other in order to avoid opposing vibrations and uniform forces to distribute.

DE 10 2017 100 612 A1 discloses a sleeve-shaped spacer for a battery housing. This spacer is arranged in the receiving volume enclosed by the battery housing and supported between the base plate and the cover plate. The base plate and the cover plate each have an opening in the area of the support of the spacer so that a screw bolt can be inserted through the base plate, the sleeve-shaped spacer and the cover plate. The spacer has an insertion section which reaches through the opening in the base plate. The screw head of the screw bolt is supported on its end face or end face, which is at a distance from the outside of the base plate. The screw head is supported on a distal end of the spacer inserted through the base plate. The spacer protruding through the base plate is welded to the base plate on the inside and outside. The other end of the screw shaft protrudes from the opening in the cover plate with a screw thread section. This screw thread section is used to fasten the battery housing to the vehicle. The cover plate is braced against the spacer when the screw bolt is braced in the anchorage on the vehicle side. The purpose of the spacer is to prevent the floor from being deformed when the screw bolt is tightened. The design of the spacer also serves this purpose with its section protruding from the bottom part on which the screw head is supported so that the through the The force introduced by the bolt head acts exclusively on the spacer.

With this previously known embodiment, several problem areas arise: On the one hand, when the battery housing is not mounted on a vehicle, the cover is loose in the area of the spacer and therefore leaks. On the other hand, there is a desire for an underfloor construction that is as flat as possible, so that any protruding components cannot be damaged or even knocked off if the vehicle hits the ground.

DE 10 2016 214 289 A1 discloses a battery housing with the features of the preamble of claim 1. In this battery housing, the spacer is formed by at least one strut connecting two side walls. Such a strut has annular extensions which each engage in a through hole in the base plate and are flush on the outside with the outside of the base plate. Such a strut is connected to the base plate by a weld seam that follows over its entire length. The strut can also be connected by a welded connection to those side walls which are connected to one another by the struts.

DE 10 2018 211 471 B3 discloses a battery housing in which sleeves are provided as spacers which are supported at the end on the base plate or the cover plate. The sleeve is held in its intended position within the battery volume by a bolt reaching through the sleeve.

DE 10 2015 907 960 A1 discloses a configuration similar to DE 10 2018 211 471 B3 . In this prior art, the connection between the spacer sleeve and the base plate protrudes beyond the underside of the base plate.

Starting from a battery case, as in DE 10 2016 214 289 A 1, the invention is based on the object of proposing a battery housing which can also be implemented with other spacers instead of struts and in which production is also simplified.

This object is achieved by the aforementioned, generic battery housing for a motor vehicle with a spacer, in which the end surface of the plug-in section is materially connected to the plate and the center of a weld is arranged on the end surface of the plug-in section of the spacer.

The term “plug-in section” used in the context of these explanations is that section of the spacer which, starting from the plane of the inside of the plate, projects into the opening.

The spacer arranged in the battery housing does not protrude on the outside from the opening in the base plate or the cover plate. This advantageously means that the end surface formed by the material of the spacer is arranged within the opening, while at the same time preventing parts of the spacer from protruding from the plate on which this support arrangement is made from the battery housing.

The plug-in section rests with its outer jacket surface, preferably at least in sections, on the jacket surface of the opening. By contacting the two lateral surfaces, a form fit acting in the plane of the plate is formed between the spacer and the base plate. A stop is provided through the opening. This simplifies the positioning of the spacer on the plate to be supported. The insertion section preferably has the same cross-sectional geometry as the opening. The circumferential surface of the plug-in section can then bear against the surface of the opening. An embodiment is also conceivable in which the jacket surface of the insertion section is supported on the jacket surface of the opening in at least two areas. Such a support is sufficient to ensure that the spacer is aligned to simplify assembly.

The spacer is attached to the plate in order to ensure pressure and tensile strength support in the axial direction of the spacer. In a preferred embodiment, such a fastening can be formed with a material fit or a form fit.

The end face of the insertion section of the spacer facing the outside of the plate is connected to the plate with a material fit. In this way, the spacer can be materially connected to the plate from the outside. Internal joining is generally not required. The welding process is typically carried out as a MIG, MAG or laser welding process. The arc is typically ignited on the more massive component. The arc is ignited on the end surface of the insert section of the spacer. In this way, the weld pool is created during the welding process initially on the end surface, namely by melting the material of the spacer. This melt combines with the Hole edge areas of the opening when the melt extends up to this. As a result, the hole edge area is typically also partially or partially melted, but without an arc being directed at the plate, which is generally thinner than the spacer material available for the intended weld. The risk of inadvertent burning through is effectively prevented in this way. In the welded connection, the center of the weld seam is on the end surface. It was recognized that by using the material provided by the spacer to form a weld seam, a possible welding distortion in the battery housing, in particular with regard to the plate, can be reduced, so that higher process reliability, which also has a positive effect on the tightness of the battery housing affects is given. In addition, the arc acts in the direction of the axial extent of the spacer and thus in a direction in which an unintentional burning through cannot occur.

It is also possible that the plug-in section protrudes only partially into the opening in the plate, and consequently its end surface does not end flush with the outside of the plate, but is located within the opening. As a result, the end surface of the insertion section, together with the jacket surface of the opening, forms a step in which a weld seam can be placed as a fillet weld. In such a configuration, the end surface of the plug-in section is materially connected to the jacket surface of the opening.

Due to the material connection between the spacer and the plate, the spacer is supported in the axial direction on the plate. If the weld is extensive and continuous, the connection is also tight, typically gas-tight.

In order to achieve a uniform heat input during the welding process, the outer surface of the spacer is aligned with the opening in the area of the transition from the spacer to the plate, without the spacer having a protrusion that rests against the inside of the plate. This avoids excessive heat input into the plate.

In an alternative embodiment, which can also be used in addition to the embodiment described above, the spacer is connected to the plate via a form fit, in particular in the form of a screw connection to the plate. For this purpose, the spacer has a support surface that contacts the inside of the plate, for example a shoulder, and an internal thread made in its end surface. The spacer is attached to the plate by means of a screw connection which engages in the internal thread and acts with a head or collar against the outside of the plate. A screw connection is particularly advantageous when the bottom part is to be separated from the cover part for dismantling purposes. At the same time, the screw connection, which is independent of additional assembly steps, ensures that the battery housing can be designed to be tight, in particular also gas-tight, even during transport.

The screw connection can take place by means of a sleeve which, in a section of its outer jacket surface, has an external thread meshing with the internal thread of the spacer and has a collar acting against the outside of the plate. It goes without saying that the collar has, at least in sections, a larger diameter than the smallest diameter of the opening in the plate. Positioning aids from the body can engage in the sleeve. The weight of the battery housing is also reduced in this way.

The sleeve can also be designed as an internally threaded sleeve so that the battery housing can be fastened to the body of the vehicle by means of a screw connection that engages in the internal thread of the sleeve. Such a configuration opens up the possibility of attaching the battery housing to the vehicle from the body.

In order to ensure the tightness of the fastening area, a seal can be arranged between a collar of the screw connection acting against the outside of the plate and the plate, so that the screw connection is protected from any environmental influences. Such a seal can be implemented via a sealing compound, a solid seal or also via an adhesive bond. Corrosion problems in the screw connection are thus avoided. It is also possible to arrange a seal between the end face of the spacer which supports the plate on the inside and the plate. It can be provided that the end face has a groove into which the seal, for example an O-ring, can be inserted. As a result of this configuration, provided the connection between the bottom part and the cover part is also made gas-tight, despite an opening made in the battery housing, this can be made gas-tight in the area of the spacer supports.

In principle, the spacer can be designed as a sleeve body. Is the spacer materially bonded to the plate or by means of a Sleeve connected, opens the inner hollow chamber of the spacer on the outer sides of the plates of the battery housing, creating a possibility of inserting a screw bolt through the spacer to fasten the battery housing to the vehicle.

It goes without saying that the spacer can be supported on the other plate in the same way. It is also possible to design the support on the other plate differently. If the support arrangement described is located, for example, on the cover plate, the support on the then opposite base plate can be provided either by the spacer itself or by a strut inserted into the trough structure of the base part on which a spacer element is placed. The spacer is then formed from the strut and the spacer element which is placed on the top of the strut.

In one embodiment, the connection of the spacer to the other plate of the battery housing is characterized in that it is supported with its end face on the other plate and this plate has an opening in the area of this support, the end face of the spacer circumferentially over the edge of the opening in the radial direction inwards in the plane of the support of the end face on the plate and the spacer is attached to this plate.

The spacer is then supported on the plate with its end face formed by its material. The spacer is thus on the inside on the plate to be supported. In one embodiment, this support can take place directly, and consequently the end face makes contact with the plate. In another embodiment, a seal, for example an O-ring, is arranged between the end face and the plate. Such a seal can be arranged in a groove on the end face of the spacer for easy assembly.

In the area of the spacer, the plate, which is supported on the end face of the spacer, has an opening. The geometry of the end face of the spacer and that of the opening are matched to one another, specifically in such a way that the end face supported on the inside of the plate extends over the edge of the opening. Thus, the end face protrudes over the edge of the opening in the direction of the center of the opening over its edge. The spacer is thus supported by only part of its end face on the inside of the plate. Another part of its end face protrudes beyond the edge of the opening.

With this configuration, an extremely simple and effective tolerance of the spacer relative to the plate to be supported is achieved. The spacer can be moved to the extent that its end face in the plane of its support on the plate in the direction of the center of the opening into this, for proper positioning relative to the plane of the plate and thus for tolerance compensation in the plane of the support . The end face of the spacer thus also represents a tolerance compensation surface with regard to the support of the spacer on the plate. A special feature is that this succeeds due to the circumferential support without having to accept leaks or undercuts. The outer shape of the end face preferably corresponds to the shape of the opening. In this way, optimal utilization of the available area for tolerance compensation is provided. In the case of the design of the spacer with an end face provided by a sleeve section, the end face is to be understood as that area which is provided by the material of the sleeve.

If an opening in the plate in the support area of the end face of the spacer is mentioned in the context of the statements of this exemplary embodiment, this opening can also be provided by a plurality of openings, typically arranged in a grid. In such a case, the surrounding lateral surface of these openings can represent the edge over which the end surface of the spacer extends.

The spacer is attached to the supported plate. In one embodiment, fastening takes place by means of a materially bonded joining process, for example by welding, preferably by means of a MIG or MAG welding process. A laser welding process is also conceivable. The step provided by the protrusion of the end face of the spacer over the edge of the opening from the outside of the plate is used here. A fillet weld can be made in this. If the weld seam is provided over the entire circumference of the opening, which should be the rule in many cases, this also ensures the required tightness.

In another configuration of this exemplary embodiment, which can also be used in addition to the welding process described above, the spacer is screwed to the plate. The spacer has a for this purpose internal thread opening into its end face supported on the plate. A screw connector can be screwed into this internal thread. The plate is arranged between the screw head and the end face of the spacer, so that the spacer clamps the plate from the inside and the screw head from the outside when the screw connector is tensioned. In this embodiment, a seal can be attached between the outside of the plate and the screw head, for example in the form of an O-ring. Of course, in addition to the solid seal already mentioned, a sealing compound can also be used as a seal at this point. Such an outside seal has the advantage that any environmental influences not only cannot penetrate into the battery housing, but are also kept out of the threaded area. This makes dismantling, which may have to be carried out, considerably easier, since signs of corrosion between the intermeshing threads are avoided. It is also possible to seal the thread.

The screw connector can be a screw bolt, for example. In another embodiment, the screw connector is a screw sleeve. In such a configuration, the sleeve has a support flange which protrudes radially outward at the end and represents the screw head of such a screw connector. The use of a sleeve opens up additional possibilities: If the spacer itself is a sleeve, the passage created in this way can be used to dissipate heat from the heat generated within the receiving volume. For a fixation, such a screw connector designed as a sleeve body can have an internal thread. The battery housing can then be fastened on the vehicle side by means of screws that are brought in from the vehicle side. In such an embodiment, despite the screw connection, there are no protruding elements from the underside of the base part.

The above-described spacer of this exemplary embodiment can be displaced with respect to its position relative to the plate to be supported, without this resulting in disadvantages with respect to the load-bearing capacity or the mounting options. At the same time, a possibility is created to provide an opening in the plate at the position of a spacer, which opening can be sealed off from the receiving volume by the spacer in a simple and secure manner, in particular also gas-tight. Even in the delivery state of a battery housing, the described support of the spacer on the base plate or the cover plate is tight and protected from any environmental influences.

In one embodiment of such a battery housing, the spacer and the base plate and / or the cover plate are made from the same material. This does not mean that these elements are made of identical material, but that they belong to a material group, for example these parts are steel components. This is advantageous in terms of avoiding galvanic corrosion and also brings advantages when joining.

• 1: ein geschlossenes Batteriegehäuse mit einem Bodenteil und einem Deckelteil,
• 2: das Batteriegehäuse gemäß 1, bei dem das Deckelteil entfernt ist,
• 3: ein hülsenförmiger Abstandshalter in einer ersten Ausgestaltung, der im unteren Bereich durch eine Schweißverbindung an dem Batteriegehäuse befestigt ist,
• 4: ein hülsenförmiger Abstandshalter, der gemäß einer anderen Ausgestaltung im unteren Bereich mittels einer Schweißverbindung an dem Batteriegehäuse befestigt ist und
• 5: ein Abstandshalter gemäß einer weiteren Ausgestaltung, der durch eine in dem Aufnahmevolumen des Batteriegehäuses befindlichen Querstrebe und einem Abstandshalteelement befestigt ist.

The invention is described below by way of example with reference to the accompanying figures. Show it:

• 1 : a closed battery case with a bottom part and a cover part,
• 2 : the battery case according to 1 with the cover part removed,
• 3 : a sleeve-shaped spacer in a first embodiment, which is attached to the battery housing in the lower area by a welded connection,
• 4th : a sleeve-shaped spacer which, according to another embodiment, is fastened to the battery housing in the lower region by means of a welded connection and
• 5 : A spacer according to a further embodiment, which is fastened by a transverse strut located in the receiving volume of the battery housing and a spacer element.

1 shows a battery case 1 the longitudinal extent and transverse extent of which is significantly greater than its extent in height. The battery case 1 has a relatively large area, for example 1 x 2 m. The battery case 1 has a cover part 2 . The lid part 2 includes a cover plate 3 that emerges as the base of the battery case 1 extends in one plane. The lid part 2 is on a bottom part 4th connected. The bottom part 4th includes side walls 5 , 5.1 , 5.2 , 5.3 and a base plate not visible in this view. The side walls 5 , 5.1 , 5.2 , 5.3 are provided by a housing frame made from individual extruded profile parts. The lid part 2 is on its edges 6th , 6.1 , 6.2 , 6.3 all around with the side walls 5 - 5.3 screwed. In addition, there is the cover plate 3 in their center opposite the in 1 non-visible base plate supported by a non-visible spacer. The cover plate 3 is with the invisible spacer by means of a fastening 7th connected.

2 shows that in 1 Battery case shown 1 , in which the lid part 2 away. The base plate is recognizable 8th of the bottom part 4th , Which like the cover plate 3 flat as the base of the battery housing 1 extends in one plane. The space that goes through the battery case 1 is included when the lid part 2 with the bottom part 4th is mounted, is referred to below as the receiving volume, in which battery modules, not shown in the figures, can be inserted. Additionally is in the bottom part 4th one the side walls 5.1 , 5.3 connecting cross brace 9 arranged. In the cross brace 9 is a spacer 10 used.

The spacer 10 is in 3 shown in detail. For the sake of clarity, the cross strut is in this figure 9 not shown. The sleeve-shaped spacer 10 is from the side walls 5 , 5.1 , 5.2 , 5.3 of the battery case 1 spaced apart and is located within the receiving volume, in the illustrated embodiment in the center of the receiving volume. The spacer 10 is in this embodiment a sleeve-shaped body with the bottom plate 8th is welded.

In the area where the spacer 10 on the base plate 8th is arranged, has the base plate 8th about a breakthrough 11 . Into the breakthrough 11 the spacer protrudes 10 with an insertion section 12 inside. In this exemplary embodiment, the end surface is 13 of the insertion section 12 with the outside 14th the base plate 8th flush. In this exemplary embodiment, the end surface is 13 the face of the spacer 10 . The breakthrough 11 has a larger diameter than the insertion section by a necessary assembly clearance 12 of the spacer 10 . The insertion section is hereby located 12 with its jacket surface on the jacket surface of the opening 11 at. The breakthrough 11 is used as a positioning hole for aligning the spacer 10 opposite the base plate 8th used.

For fastening and supporting the spacer 10 on the base plate 8th , is the spacer 10 with the base plate 8th from the outside of the bottom part 2 extensively welded. The extensive weld seam also ensures the required tightness. A MIG, MAG or laser welding process is used as the welding process. A laser welding process is also conceivable. This is done by the spacer during the welding process 10 provided material in the area of the insertion section 12 or the end surface 13 used to provide a weld pool. To do this, the arc is on the end face 13 ignited. That is on the end face 13 The weld pool that forms is firmly bonded to the base plate 8th , where the the breakthrough 11 framing hole edge area of the base plate 8th is preferably only partially melted. The result is the spacer 10 on the base plate 8th attached with a weld, the center of which, therefore the starting center of the weld pool, on the end surface 13 is arranged. This weld is on the right half of the spacer 10 in 3 dashed in outline with reference numerals 15th indicated. By directing the arc on the end face 13 of the spacer 10 is in a clever way the risk of burning through the relatively thin base plate 8th avoided. This represents the longitudinal extension of the spacer 10 in the area of its insertion section 12 an adequate material reservoir. An unintentional burning through of the sleeve jacket of the spacer 10 is avoided because the arc in the direction of the material extension of the spacer 10 is directed. The heat emanating from this is sufficient to cover the edge areas of the opening 11 to melt for the desired joint. In addition, this measure and the resulting reduced heating of the base plate prevents warpage of the same or at least reduces it to a minimum.

The spacer 10 has a penetrating channel. Thus, a screw bolt, not shown in detail, can be used to fasten the battery housing 1 be plugged into a vehicle through this component.

4th shows the connection between another spacer 10.1 and a base plate 8.1 according to an alternative embodiment. In this configuration, the insertion section protrudes 12.1 only partially in the opening 11.1 inside. Its closing surface 13.1 is thus located within the opening 11.1 and is adjacent to its outer surface 16 . By facing the outside of the base plate 8.1 recessed end surface 13.1 is together with the lateral surface 16 the breakthrough 11.1 a throat forming step is formed. In this embodiment, this is used to limit a circumferential fillet weld 15.1 used, their schematized outline in 4th only on the right side of the breakthrough 11.1 is shown in dashed lines. Here too, MIG, MAG or laser welding processes in particular come into consideration as welding processes in order to ensure that the weld seam is sealed. The fillet ensures the formation of a secure, in particular circumferentially tight welded connection, to be precise without the inner or outer lateral surface of the spacer 10.1 to affect. This is in relation to the inner surface of the spacer 10.1 of interest if the sleeve channel is to be used for the passage of a screw connector. The fillet weld carries in the direction of the longitudinal extension of the spacer 10.1 not on, so on the outside of the bottom plate 8.1 the head of a screw connector at the edge of the opening 11.1 the base plate 8.1 can be brought to the plant all around.

Another alternative embodiment is shown in 5 shown. The spacer 10.2 this embodiment is through a cross brace 9.1 and a spacer element connected thereto 17th provided. The cross brace 9.1 is inserted into a bottom part of a battery housing in exactly the same way as this to the cross brace 9 of the embodiment 1 to 3 is described. The spacer element 17th is on the cross brace 9.1 attached by means of a weld. The connection to the cover plate 3.1 takes place in accordance with one of the configurations described above. In the illustrated embodiment, the end surface is 13.2 of the spacer element 17th flush with the outside 14.1 the cover plate 3.1 . On the base plate 8.2 is this spacer 10.2 with outwardly flared support legs of the cross brace 9 supported.

The invention has been explained using exemplary embodiments. Without departing from the valid scope of protection, described by the claims, numerous further refinements arise for the person skilled in the art for realizing the subject matter of the invention without these having to be explained in more detail in the context of these explanations.

List of reference symbols

1

Battery case

2

Cover part

3, 3.1

Cover plate

4th

Bottom part

5 - 5.3

side walls

6 - 6.3

Edge of the lid part

7th

Attachment to spacers

8,8.1,8.2

Base plate

9, 9.1

Cross brace

10, 10.1, 10.2

Spacers

11, 11.1

Breakthrough

12, 12.1

Insertion section

13, 13.1, 13.2

End face

14, 14.1

Outside of the base plate

15, 15.1

Weld

16

Lateral surface of the opening

17th

Spacer element

Claims (14)

Battery housing (1) for a motor vehicle, comprising a base part (4) with a base plate (8, 8.1, 8.2) and a cover part (2) with a cover plate (3, 3.1), the base part (4) and the cover part (2 ) limit a receiving volume for receiving at least one battery module and wherein the two plates (3, 3.1, 8, 8.1, 8.2) are arranged within the receiving volume and supported on both plates (3, 3.1, 8, 8.1, 8.2) spacer (10, 10.1, 10.2) are spaced apart and the respective plate (3, 3.1, 8, 8.1) has an opening (11, 11.1) in the region of at least one support, the spacer (10, 10.1, 10.2) via an insertion section (12, 12.1) which protrudes into the opening (11, 11.1) and wherein the spacer (10, 10.1, 10.2) is attached to this plate (3, 3.1, 8, 8.1, 8.2), and the insertion section (12 , 12.1) extends into the opening (11, 11.1) at most so far that its end surface (13 , 13.1) is flush with the outside (14) of the plate (8, 8.1), characterized in that the end surface (13, 13.1) of the plug-in section (12, 12.1) is firmly connected to the plate (8, 8.1) and the The center of a weld seam (15, 15.1) on the end surface (13, 13.1) of the insertion section (12, 12.1) of the spacer (10, 10.1) is arranged. Battery case after Claim 1 , characterized in that the spacer (10, 10.1) is a sleeve body. Battery case after Claim 1 or 2 , characterized in that the jacket surface of the insertion section (12, 12.1) rests at least in sections against the jacket surface (16) of the opening (11, 11.1). Battery case according to one of the Claims 1 to 3 , characterized in that the insertion section (12.1) protrudes only partially into the opening (11.1) of the plate (8.1), so that through the end surface (13.1) of the insertion section (12.1) and the lateral surface (16) of the opening (11.1) a Step is formed, and wherein the end surface (13.1) of the plug-in section (12.1) is firmly connected to the jacket surface (16) of the opening (11.1). Battery case according to one of the Claims 1 to 4th , characterized in that the spacer (10, 10.1, 10.2) has a support surface contacting the inside of the plate and the spacer (10, 10.1, 10.2) is inserted into its End surface (13, 13.1, 13.2) has introduced internal thread and is attached to the plate (3, 3.1, 8, 8.1, 8.2) with a screw connection which engages in the internal thread and acts against the outside of the plate. Battery case after Claim 5 , characterized in that the screwing takes place by means of a sleeve which has an external thread meshing with the internal thread of the spacer (10, 10.1, 10.2) and a collar acting against the outside of the plate. Battery case after Claim 6 , characterized in that the sleeve is designed as an internally threaded sleeve. Battery case according to one of the Claims 5 to 7th , characterized in that a seal is arranged between a collar of the screw connection which acts against the outside of the plate and the plate (3, 3.1, 8, 8.1, 8.2). Battery case according to one of the Claims 1 to 8th , characterized in that the opening (11, 11.1) of the plate (8, 8.1) has the same cross-sectional geometry as the end surface of the spacer (10, 10.1, 10.2). Battery case according to one of the Claims 1 to 9 , characterized in that a seal is arranged between the end face and the plate (3, 3.1, 8, 8.1, 8.2). Battery case according to one of the Claims 1 to 10 , characterized in that the receiving volume is sealed circumferentially. Battery case according to one of the Claims 1 to 11 , characterized in that the spacer (10, 10.1, 10.2) is made of the same material as the base plate (8, 8.1, 8.2) or the cover plate (3, 3.1) on which the spacer (10, 10.1, 10.2) is supported. Battery case according to one of the Claims 1 to 12 , characterized in that part of the spacer (10.2) is a strut (9.1) inserted into the bottom part (8.2) or the cover part (3.1) with at least one spacer element (17) connected to it. Battery case according to one of the Claims 1 to 13 , characterized in that the spacer (10, 10.1, 10.2) is attached to both plates (3, 3.1, 8, 8.1, 8.2).

Images