BATTERY HOUSING FOR A TRACTION BATTERY HAVING IMPROVED MAINTENANCE POSSIBILITIES AND TRACTION BATTERY FOR ELECTRIC VEHICLES - Patent application

Abstract

- the first housing shell has a first collar extending at least partially around the first housing shell; - the second housing shell has a second collar extending at least partially around the second housing shell; - the battery housing has at least one connecting element with two pressure rims; - the at least one connecting element is designed to engage around the first and second collars and to clamp the first and second collars together by means of the two pressure rims of the connecting element, exerting a normal force on the first and second collars; - the first collar and / or the second collar have at least one first latching means; - the connecting element has at least one second latching means; - the connecting element can be latched to the first collar and / or the second collar by means of the first and second latching means.

Description

[Technical field]

[0001] The present invention relates to a battery housing for a traction battery for an electrically drivable electric vehicle, the battery housing having a first housing shell and a second housing shell connectable to the first housing shell to bound an interior designed to receive at least one battery module.

[0002] Battery housings known from the prior art often have housing shells made of metal in the form of an upper shell and a lower shell, each having a peripheral collar. Battery housings are also known in which the upper and lower shells are made of a plastic material. The housing shells are connected to each other by connecting screws, with the two collars of the upper and lower shells being connected to each other by connecting screws.

[0003] For example, self-tapping screws can be used for the connecting threads. Furthermore, it is possible to insert threaded inserts into the collars of the housing shells. A disadvantage of the corresponding design is that many components are used, which makes handling during assembly and / or service very complicated. Furthermore, problems when assembling a corresponding battery housing are, for example, that screws can be dropped into the battery housing and / or that screws can be left behind in the battery housing. In addition, in the case of corresponding embodiments of the battery housing, high demands are made on the fitting precision and on the positional tolerance of the hole pattern of the upper housing shell relative to the lower housing shell. A further disadvantage of a battery housing designed accordingly is that in the presence of an incomplete internal thread on the battery housing, complex re-machining is necessary, as a result of which, for example, metal chips can reach the inside of the battery housing again, which must be absolutely avoided in order to reduce the risk of short circuits.

[0004] Finally, in the case of battery housings designed accordingly, there is a problem of leakage of the battery housing, since due to the stiffness requirements for the flange system or the collars of the housing shells, the sealing elements arranged between the housing shells or between the collars of the housing shells are not uniformly compressed due to the strong variations in preload, and as a result the battery housing may leak, since a different preload occurs between the screw tips of the battery housing compared to the immediate vicinity of the screw tips.

[0005] SUMMARY OF THE PRESENT EMBODIMENT It is an object of the present invention to provide a battery housing for a traction battery which does not have the disadvantages explained above.

[0006] The object of the invention is achieved by a battery housing having the features of claim 1. Advantageous embodiments of the battery housing are set forth in the claims dependent on claim 1.

[0007] More precisely, the object of the invention is achieved by a battery housing for a traction battery, the battery housing having a first housing shell and a second housing shell that can be connected to the first housing shell to bound an interior designed to receive at least one battery module. The first housing shell of the battery housing has a first collar that extends at least partially around the first housing shell and the second housing shell of the battery housing has a second collar that extends at least partially around the second housing shell. The battery housing further comprises at least one connecting element with two pressure rims that are designed to surround the first collar and the second collar and to clamp them together by means of the two pressure rims of the connecting element exerting a normal force on the first collar and the second collar. The battery housing according to the invention is characterized in that the first collar and / or the second collar have at least one first latching means and the connecting element has at least one second latching means, allowing the connecting element to be latched to the first collar and / or the second collar by the first latching means and the second latching means.

[0008] The battery housing according to the invention has several advantages: it thus has an improved seal, since the collar and the sealing element which may be arranged between the collars are clamped together uniformly over the entire longitudinal extension of the connecting element, so that no pressure differences arise along the longitudinal extension of the collar.

[0009] Furthermore, the battery housing according to the invention is easily assembled by placing the housing shells on top of each other and then pressing the connection element onto the collars of the housing shells and clamping the collars together by the connection element. Locking the connection element to the first and / or second collar prevents it from being pulled out. However, during maintenance operations on the traction battery, deformation of the first latching means and / or deformation of the second latching means allows the connection element to be released from the two collars, so that the battery housing can be easily opened for maintenance purposes.

[0010] A further advantage of the battery housing according to the invention is that the required positioning accuracy of the housing shells relative to one another can be reduced, as a result of which the battery housing can be assembled in a more simplified manner.

[0011] Furthermore, the battery housing according to the present invention has the advantage that no screws and / or no metal chips can reach the inside of the battery housing, thereby greatly reducing the risk of short circuits.

[0012] A further advantage of the battery housing according to the present invention is that it has a minimal overall height since the collar of the housing shell can have a low profile extension.

[0013] A still further advantage of the battery housing according to the invention is that in the event of an accident, crash and / or crush loads are distributed in an improved manner, whereby the battery housing according to the invention provides increased safety in the event of an accident, since the flange or collar areas of the battery housing are mechanically stabilized by the connection elements in the event of introduction of loads when twisting and / or bending of the battery housing occurs.

[0014] A still further advantage of the battery housing according to the invention is that the stiffening requirements for the flange area or for the collar area of ​​the battery housing are reduced, since they are stiffened by the connection elements, thus allowing a reduction in the use of material of the battery housing in that collar area, and as a result the weight of the battery housing according to the invention is also reduced.

[0015] In the case of a connecting element made of metal, there is the further advantage that a continuous electromagnetic current flow of the flange or collar area of ​​the battery housing is provided. Furthermore, in the case of a connecting element made of metal, it is advantageous for the collar area of ​​the battery housing to have an improved fire resistance.

[0016] Of course, the interior of the battery housing can also be designed to accommodate more than one battery module, ie, any number of at least two or more than two battery modules.

[0017] The first collar may also be referred to as a first protrusion or a first connecting flange, and the second collar may also be referred to as a second protrusion or a second connecting flange.

[0018] The first housing shell and / or the second housing shell are preferably made of a plastic material. More preferably, the plastic material is fiberglass and / or carbon fiber reinforced fiberglass embedded in a plastic material matrix. The advantage of a housing shell made of a plastic material is that it is light in weight and the housing shell has sufficient rigidity and strength. A further advantage of a housing shell made of a plastic material is that during machining of the housing shell, no metal chips are generated that can reach the inside of the battery housing, thereby reducing the risk of short-circuiting the traction battery. Suitable plastic materials for the first housing shell and / or the second housing shell are polyamide and / or polypropylene and / or polycarbonate and / or polyethylene, or mixtures of these plastic materials.

[0019] The connection elements may also be referred to as holding clamps and / or clamp rails. The connection elements are preferably made of metal. Suitable metals for the connection elements are, for example, steel and / or aluminum and / or copper and / or brass. A correspondingly designed connection element has the advantage that the second latching means can have a suitable plastic deformability, whereby the second latching means can be plastically deformed between a release position, in which the second latching means is not latched to the first latching means, and a latched position, in which the second latching means is latched to the first latching means. As a result, the corresponding design of the connection elements allows the assembly of the battery housing in a further simplified manner.

[0020] The connecting element preferably has a cross section with a U-shaped or V-shaped profile, the two pressure limbs of the connecting element forming the limbs of the U-profile or V-profile. More preferably, the two pressure limbs of the connecting element are connected to each other by a rear wall, which can also be called a belt.

[0021] Latching is according to the invention understood to mean that the first latching means engages against the rear face of the second latching means and / or the second latching means engages against the rear face of the first latching means, thereby preventing the connecting element from being pulled out of the two collars of the housing shell when the second latching means is in the latched position. Preferably, the first latching means and the second latching means contact each other.

[0022] The battery housing is preferably designed such that the connection element is designed to engage the back surface of the first collar and / or the second collar.

[0023] A correspondingly designed battery housing has the advantage that the battery housing can be assembled in a simplified manner, since the second latch means of the connecting element can be preformed in such a way that the second latch means is in its latched position, so that during assembly of the battery housing, when the connecting element is pressed against the collar of the housing shell, the second latch means elastically deforms and returns to its latched position after engaging with the rear surface of the first latch means.

[0024] Alternatively, it is possible for the second latching means of the connecting element to be preformed in such a way that it is in its released position and is deformed into its latched position by crimping after the connecting element is pressed against the collar.

[0025] More preferably, the battery housing is designed such that the first latch means is designed as a latch recess and / or latch edge and the second latch means is designed as a latch protrusion, and at least one latch protrusion is capable of engaging with a rear surface of at least one latch recess and / or latch edge.

[0026] The correspondingly designed battery housing is further simplified in assembly. Moreover, the structure of the correspondingly designed battery housing is very simple.

[0027] The second latching means of the connecting element may also be referred to as a latch tongue.

[0028] More preferably, the battery housing is designed such that at least one latch projection is formed on at least one of the pressure rims of the connecting element.

[0029] The battery housing is preferably designed so that at least one latch projection is formed on each of the pressure rims of the connecting element.

[0030] A correspondingly designed battery housing has a simple structure and at the same time ensures reliable protection against removal or detachment of the connecting element from the collar of the housing shell.

[0031] More preferably, the battery housing is designed such that at least one of the pressure rims has at least one material recess in which the at least one latch projection is located.

[0032] The battery housing is preferably designed such that both pressure rims of the connecting element each have at least one material recess in which a latch projection is disposed.

[0033] The corresponding design of the battery housing allows the latch projection to be moved to its latched and open positions in a simplified manner, and therefore allows its assembly and its disassembly or opening in an even simplified manner. Furthermore, due to the material recess, the latch projection is more easily accessible by a suitable tool. For example, a screwdriver can be used to move the latch projection from its latched position to its open position.

[0034] More preferably, the battery housing is designed such that at least one disassembly opening is formed in one of the pressure rims.

[0035] A correspondingly designed battery housing can be disassembled in a further improved manner and therefore opened for maintenance operations, since by providing a disassembly opening, it is easily possible to displace the connection element relative to the collar of the housing shell, thereby disengaging the first and second latch means.

[0036] The at least one disassembly opening is preferably located adjacent to the latch projection.

[0037] More preferably, the at least one pressure rim has two disassembly openings and the latch projection is disposed between the two disassembly openings.

[0038] More preferably, the battery housing is designed such that at least one latch projection is plastically or elastically deformable by crimping into a latched position in which the latch projection engages the back surface of a latch recess or latch edge.

[0039] The battery housing is preferably designed such that the first and second pressure rims are connected to each other by a rear wall, the first latch means is designed as a latch hook and the second latch means is designed as a latch opening in the rear wall, and under elastic deformation of the latch hook by pressing the connecting element against the first and second collars, it is possible to guide the latch hook through the latch opening, whereby the latch hook engages with the rear surface of the latch opening.

[0040] Correspondingly designed battery housings are particularly easy to assemble, since the connection elements can be easily pressed against the mating collar of the housing shell, the latch hooks being guided through the latch openings under elastic deformation and engaging the rear side of the latch openings under a restoring movement after the connection elements have been pressed against the collar, so that the connection elements cannot be pulled out of the collar. To open the battery housing (e.g. for maintenance operations and / or for installation or removal of battery modules), the latch hooks can be disengaged from the latch openings under elastic deformation or, where appropriate, under plastic deformation, and the connection elements can be pulled out of the collar.

[0041] The rear wall of the connecting element may also be referred to as a belt.

[0042] The latching of the latch hook into the latch opening may also be referred to as clipping.

[0043] The battery housing is preferably designed such that the battery housing has at least one sealing element disposed between the first collar and the second collar.

[0044] By providing the sealing element, the battery housing has further improved adhesion. Preferably, the sealing element has an X-shaped or O-shaped or L-shaped cross section. According to the present invention, there is no restriction on the design of the sealing element. This further improves the adhesion of the battery housing.

[0045] More preferably, the battery housing is designed such that the first collar and / or the second collar has a receiving groove in which the at least one sealing element is located.

[0046] The correspondingly designed battery housing has further improved adhesion because the sealing element has a fixed position between the first collar and the second collar. Furthermore, the sealing element can be compressed in a manner determined by the depth extension of the receiving groove when the housing shells are mated, so that the sealing effect of the sealing element is further improved.

[0047] The battery housing is preferably designed such that the first collar and / or the second collar have at least two protrusions between which the connecting element can be positioned, thereby preventing translational displacement of the connecting element relative to the housing shell.

[0048] A correspondingly designed battery housing provides improved stability and adhesion since displacement of the connecting elements along the longitudinal extension of the collar is prevented.

[0049] The object of the invention is also achieved by a traction battery having the features of claim 12. More precisely, the object of the invention is achieved by a traction battery for an electric vehicle, the traction battery having a battery housing as described above, at least one battery module being accommodated inside the battery housing.

[0050] Further advantages, details and features of the invention can be found in the embodiments described below. [Brief description of the drawings]

[0051] [Figure 1A] FIG. 2 is a perspective view of a battery housing according to the present invention in the contact area of ​​the first housing shell and the second housing shell. [Figure 1B] FIG. 1B is a cross-sectional view of the cutout shown in FIG. 1A. [Diagram 2] FIG. 13 is a perspective view of a battery housing according to a further embodiment of the invention in the contact area of ​​the first housing shell and the second housing shell. [Diagram 3] FIG. 2 is a perspective view of a corner region of the battery housing. [Figure 4A] 13 is a perspective view of a corner region of a battery housing according to a further embodiment of the present invention. FIG. [Figure 4B] FIG. 4B is a plan view of the area of ​​the battery housing shown in FIG. 4A. [Figure 4C] FIG. 4C is a cross-sectional view of the cutout shown in FIG. 4B.

[0052] In the following description, the same reference numbers represent the same components or features, so that the description of a component with reference to one drawing also applies to the other drawings, in order to avoid repetition of the description. Moreover, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0053] Figure 1A is a perspective view of a battery housing 1 according to the present invention in the contact area of ​​a first housing shell 10 and a second housing shell 20. Figure 1B is a cross-section of a portion of the battery housing 1 shown in Figure 1A.

[0054] The battery housing 1 is designed to receive a traction battery for an electrically drivable electric vehicle, which may for example be a purely electrically drivable electric vehicle or a hybrid electric vehicle in which an internal combustion engine takes over the drive of the electric vehicle together with and / or instead of an electric motor.

[0055] In the connected state of the first housing shell 10 and the second housing shell 20, the battery housing 1 bounds and thus forms an interior 2 designed to receive at least one battery module, preferably to receive multiple battery modules.

[0056] As can be seen in Figures 1A and 1B, the first housing shell 10 has a first collar 11 that extends at least partially around the first housing shell 10. As can be seen, the first collar 11 is L-shaped and extends away from the first housing shell 10 to the outside of the battery housing 1. The second housing shell 20 has a second collar 21 that extends at least partially around the second housing shell 20. The second collar 21 also extends from the interior 2 away from the second housing shell 20. In the embodiment shown, the second collar 21 is also L-shaped, and one of the rims of the second collar 21 together with the housing wall of the second housing shell 20 forms a receiving groove 33 in which, in the embodiment shown, a sealing element 60 is placed, the sealing element 60 having an X-shaped cross section. In this case, the sealing element 60 is positioned between the first collar 11 and the second collar 21 and accommodated in the receiving groove 33, whereby a defined compression of the sealing element 60 is achieved by bringing the first housing shell 10 and the second housing shell 20 together or by pressing them together.

[0057] The battery housing 1 according to the invention comprises at least one connection element 40 with two pressure rims, where a first pressure rim 41 is connected to a second pressure rim 42 via a common rear wall 43. As a result, the connection element 40 has a U-shaped cross section. The connection element 40 can also be referred to as a connection rail 40 or a connection flange 40.

[0058] As can be seen, the connecting element 40 is designed to surround the first collar 11 and the second collar 21 and clamp them together by means of two pressure rims 41, 42 of the connecting element 40, exerting a normal force on the first collar 11 and the second collar 21. As a result, the sealing element 60 is compressed by pressing the connecting element 40 against the mated collars 11, 21.

[0059] As can be seen, first latching means 30, 31 in the form of a recess 31 is formed in the outer surface of the first collar 11, the recess 31 having a latching edge 31. The second collar 21 also has first latching means 30, 31, which in the embodiment shown is also designed as a latch recess 31 having a latching edge 31.

[0060] In the embodiment shown, the connection element 40 then has second latching means 50, 51, which are designed in the form of a latching protrusion 51. A respective latching protrusion is formed on the pressure rims 41, 42 of the connection element 40. More precisely, the first pressure rim 41 has at least one latching protrusion 51 and the second pressure rim 42 of the connection element 40 also has at least one latching protrusion 51. In the assembled state of the battery housing 1 shown in Figs. 1A and 1B, the connection element 40 can be latched to the first collar 11 and the second collar 21 by means of the latching recesses 31 and the latching protrusions 51, so that the connection element 40 cannot be pulled out of the two collars 11, 21. As a result, the connection element 40 can be latched to the first collar 11 and the second collar 21.

[0061] As can further be seen from the figure, the first pressure rim 41 and the second pressure rim 42 each have a number of material recesses and 53 in which the latch projections 51 are arranged. As a result of the corresponding design, deformation of the latch projections 51 is possible in a simplified manner.

[0062] The latch protrusions 51 are preformed in such a way that they are in the latched position shown in Figures 1A and 1B, or the latch protrusions 51 are deformed by plastic deformation or by crimping into the position shown in Figures 1A and 1B after the connecting element 40 is pressed against the first collar 11 and the second collar 21.

[0063] As a result, the connecting element 40 is designed to engage with the rear surface of the first collar 11 and the second collar 21. However, it is also possible that the connecting element 40 only engages with the rear surface of the first collar 11 or the second collar 21.

[0064] It can be seen that the connecting element 40 and the first collar 11 are spaced apart from each other, so that water that penetrates into the intermediate space between the connecting element 40 and the first collar 11 can flow out through the gap to the bottom of the connecting element 40 as shown in the figure, and can flow out again from the connecting element 40 and out of the recess 53.

[0065] It can also be seen from FIG. 1A that the connection element 40 has a disassembly opening 54 at least in the first pressure rim 41. A corresponding disassembly opening 54 can also be formed in the second pressure rim 42. Each material recess 53 is surrounded by two disassembly openings 54, whereby the material recess 53 is located between the two disassembly openings 54. The disassembly openings 54 are used to disassemble the battery housing 1. For this purpose, a suitable tool or a number of suitable tools (e.g. one or more screwdrivers) are inserted into the disassembly opening 54 or openings 54, so that the connection element 40 is displaced relative to the first collar 11 and the second collar 21, whereby the latch projections 51 emerge from the latch recesses 31, whereby the connection element 40 can then be pulled out of the first collar 11 and the second collar 21.

[0066] 2 is a perspective view of a battery housing 1 according to a further embodiment of the invention in the connection area between the first housing shell 10 and the second housing shell 20. In the embodiment shown in FIG. 2, the first pressure rim 41 is likewise connected to the second pressure rim 42 by the rear wall 43, whereby the connection element 40 shown in FIG. 2 also has a U-shaped cross section. In the embodiment shown in FIG. 2, the first latch means 30 is formed as a latch hook 32 and the second latch means 50, 52 is formed as a latch opening 52 in the rear wall 43 of the connection element 40. The latch hook 32 or the latch hook 32 can be guided through the respective latch opening 52 under elastic deformation of the respective latch hook 32 by pressing the connection element 40 against the first collar 11 and the second collar 21, whereby the respective latch hook 32 engages with the rear side of the respective latch opening 52.

[0067] By pressing down on each latch hook 32, the latch hook 32 can be moved to disengage from the latch opening 52, whereby the connection element 40 can then be pulled out from the first collar 11 and the second collar 21.

[0068] The remaining structure of the battery housing 1 shown in Figure 2 corresponds to that of the embodiment shown in Figures 1A and 1B, and therefore reference is made to the description of Figures 1A and 1B for the description of the battery housing 1 shown in Figure 2. However, the battery housing 1 shown in Figure 2 does not have an exploded opening 54.

[0069] 3 is a three-dimensional view of a further embodiment of the battery housing 1. In the figure, only a corner region of the battery housing 1 is shown. It can be seen that the first collar 11 has two protrusions 34. A connecting element 40 is located on each of these protrusions 34, so that the connecting element 40 cannot be displaced translationally relative to the first collar 11. Preferably, the respective connecting element 40 is arranged between the two protrusions 34, so that a displacement of the connecting element 40 in both directions along the longitudinal extension of the respective first collar 11 is prevented.

[0070] 3 also shows that the first housing shell 10 has a number of spacers 70 on which the respective connection elements 40 rest. This ensures a defined position of the respective connection elements 40 relative to the first collar 11 and thus also relative to the second collar 21. Furthermore, the spacers 70 are used as force introduction points for pressing the first housing shell 10 and the second housing shell 20 together when the battery housing is being assembled.

[0071] The embodiment shown in Figure 3 can be combined with the embodiment shown in Figures 1A and 1B. Furthermore, the embodiment shown in Figure 3 can be combined with the embodiment shown in Figure 2.

[0072] Figures 4A, 4B and 4C show a battery housing 1 according to a further embodiment of the invention. The embodiment shown in Figures 4A, 4B and 4C is based on the embodiment shown in Figure 3, whereby reference is made to the above description with regard to common features.

[0073] The battery housing 1 shown in Figures 4A, 4B and 4C differs from the battery housing 1 shown in Figure 3 in that the battery housing 1 shown in Figures 4A, 4B and 4C has a retaining clamp 80 that prevents removal of the connection element 40 or of the connection element 40 from the first collar 11 and / or the second collar 21. For this purpose, the retaining clamps 80, which are U-shaped in cross section, each have a latch device 81 on their free rim. In the embodiment shown, the latch devices 80 are designed as latch strips 81, but the invention is not limited to a corresponding design of the latch devices 81.

[0074] The retaining clamps 80 each surround the connecting element 40, in each case a retaining strip 81 of the retaining clamp 80 which engages in the fastening groove 12 of the first collar 11, and a further retaining strip 81 of the retaining clamp 80 which engages in the fastening groove 22 of the second collar 21, so that the retaining clamp 80 cannot be pulled out of the first collar 11 and the second collar 21 as long as the retaining strip 81 is engaged in the fastening grooves 12, 22.

[0075] As can be seen in particular in Fig. 4B, the fastening grooves 12, 22 are formed between two spacers 70, each on the outer side of the first collar 11 and the second collar 21. The latch strip 81 is therefore also arranged in each case between the two spacers 70, as a result of which displacement of the retaining clamp 80 in both directions along the longitudinal extension of the respective first collar 11 and second collar 21 is prevented.

[0076] The embodiments shown in Figures 4A, 4B, and 4C can be combined with the embodiments shown in Figures 1A and 1B. Furthermore, the embodiments shown in Figures 4A, 4B, and 4C can be combined with the embodiment shown in Figure 2. [Explanation of symbols]

[0077] 1 Battery Housing 2 (of the battery housing) interior 10 first housing shell 11 first collar 12 (first collar) fastening groove 20 second housing shell 21 second collar 22 (second collar) fastening groove 30 first latch means (of first or second color) 31 (of first or second color) latch recess / latch edge 32 (of first or second color) latch hook 33 receiving groove 34 protrusion 40 connecting element 41 first rim / pressure rim (of the connecting element) 42 second rim / pressure rim (of the connecting element) 43 rear wall (of the connecting element) 50 (of the connecting element) second latch means 51 (of the connecting element) latch protrusion 52 (of the connecting element) latch opening 53 material recess 54 Disassembly opening 60 Sealing element 70 Spacer 80 Retaining clamp 81 (of retaining clamp) latch device / latch strip / latch arm

Claims

1. A battery housing (1) for a traction battery, said battery housing (1) having a first housing shell (10) and a second housing shell (20) connectable to said first housing shell (10) to bound an interior (2) designed to receive at least one battery module, The battery housing (1) - said first housing shell (10) has a first collar (11) extending at least partially around said first housing shell (10); - said second housing shell (20) has a second collar (21) extending at least partially around said second housing shell (20); - said battery housing (1) comprises at least one connecting element (40) having two pressure rims (41, 42), and said at least one connecting element (40) is designed to surround said first collar (11) and said second collar (21) and to clamp said first collar (11) and said second collar (21) together by means of said two pressure rims (41, 42) of said connecting element (40) so as to exert a normal force on said first collar (11) and said second collar (21); The battery housing (1) said first collar (11) and / or said second collar (21) comprises at least one first latching means (30, 31, 32); - said connecting element (40) comprises at least one second latching means (50, 51, 52), and - said connecting element (40) can be latched to said first collar (11) and / or said second collar (21) by said first latching means (30, 31, 32) and said second latching means (50, 51, 52); The battery housing (1), characterized in that the first collar (11) and / or the second collar (21) have at least two protrusions (34) by which the connection element (40) can be positioned between them, thereby preventing translational displacement of the connection element (40) relative to the housing shells (10, 20).

2. 2. Battery housing (1) according to claim 1, characterized in that the connecting element (40) is designed to engage with a rear surface of the first collar (11) and / or the second collar (21).

3. - said first latch means (30, 31) are designed as a latch recess (31) and / or a latch edge (31); - said second latch means (50, 51) are designed as a latch projection (51), and A battery housing (1) according to claim 2, characterized in that said at least one latch projection (51) is capable of engaging with a rear surface of said at least one latch recess (31) and / or latch edge (31).

4. 4. The battery housing (1) according to claim 3, characterized in that said at least one latch projection (51) is formed on at least one of said pressure rims (41, 42) of said connecting element (40).

5. 5. The battery housing (1) according to claim 4, characterized in that at least one of the pressure rims (41, 42) has at least one material recess (53) in which the at least one latch projection (51) is located.

6. 6. Battery housing (1) according to claim 4 or 5, characterized in that at least one disassembly opening (54) is formed in one of the pressure rims (41, 42).

7. The battery housing (1) according to any one of claims 3 to 6, characterized in that the at least one latch protrusion (51) is plastically or elastically deformable by crimping into a latching position in which the latch protrusion (51) engages with a back surface of the latch recess (31) or latch edge (31).

8. - the first (41) and the second (42) pressure rims are connected to each other by a rear wall (43); - said first latch means (30, 32) are designed as a latch hook (32); - said second latch means (50, 52) are designed as a latch opening (52) in said rear wall (43), and The battery housing (1) according to any one of claims 1 to 7, characterized in that, under elastic deformation of the latch hook (32) by pressing the connecting element (40) against the first and second collars (11, 21), the latch hook (32) can be guided through the latch opening (52), whereby the latch hook (32) engages with a back surface of the latch opening (52).

9. The battery housing (1) according to any one of claims 1 to 8, characterized in that the battery housing (1) has at least one sealing element (60) arranged between the first collar (11) and the second collar (21).

10. 10. The battery housing (1) according to claim 9, characterized in that the first collar (11) and / or the second collar (21) have a receiving groove (33) in which the at least one sealing element (60) is arranged.

11. A traction battery for an electric vehicle, said traction battery comprising a battery housing (1) according to any one of claims 1 to 10, and at least one battery module being accommodated inside said battery housing (1).

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