WO2019197079A1

WO2019197079A1 - System for inserting at least one battery module into a battery case

Info

Publication number: WO2019197079A1
Application number: PCT/EP2019/055377
Authority: WO
Inventors: Peter Wurster
Original assignee: Audi Ag
Priority date: 2018-04-12
Filing date: 2019-03-05
Publication date: 2019-10-17
Also published as: DE102018205550A1; CN111954942A; CN111954942B

Abstract

The invention relates to a system for inserting at least one battery module (44) into a battery case (42) and for releasing the at least one inserted battery module (44) from the battery case (42), wherein the system has at least one securing module (60) on at least one outer wall of the at least one battery module (44) and at least one opening (76) on at least one internal wall of the battery case (44), wherein the at least one securing module (60) has a snap element (66) and a releasing tab (72), wherein, when the at least one battery module (44) is inserted into the battery case (42), the snap element (66) snaps into the at least one opening (76) and is arranged in the at least one opening (76), wherein the at least one inserted battery module (44) can be released by applying a force to the releasing tab (72) of the at least one securing module (60).

Description

System for inserting at least one battery module into one

battery box

DESCRIPTION:

The invention relates to a system for inserting at least one battery module into a battery box and for releasing the at least one inserted battery module from the battery box and a method for inserting at least one battery module into a battery box and for releasing the at least one inserted battery module from the battery box.

A high-voltage battery or HV battery of an electric vehicle includes a plurality of battery modules, which are inserted into a battery box.

A battery for a vehicle and a method for manufacturing a battery are known from the publication DE 10 2011 102 765 A1, wherein it is provided that the battery comprises a plurality of battery cells, which are arranged in a housing.

The publication DE 10 2016 115 647 B3 describes a battery carrier for an electric vehicle and a method for assembling and mounting a battery carrier. A handheld power tool described in the document DE 10 2016 211 710 A1 comprises a housing, a battery pack for supplying power to the handheld power tool and a battery interface for the detachable connection of the battery pack in the housing. Against this background, it was an object to enable a mounting of a battery module in a battery box and a disassembly of the battery module.

This object is achieved by a system and a method having the features of the independent patent claims. Embodiments of the system and method are evident from the dependent claims.

The inventive system is for inserting at least one battery module in a battery box, for example. In an interior of the battery box, and for releasing the at least one inserted battery module from the battery box formed and has at least one to be arranged on an outer wall or outer skin of the at least one battery module or Anordenbares and / or arranged fixing module for the at least one battery module and at least one opening or recess as a receiving module on an inner wall or inner skin of the battery box. In this case, the at least one fixing module has a resilient and / or resilient snap element, for example a latching lug, and a release latch, wherein the snap element is inserted into the at least one battery module in the at least one opening or recess, for example an undercut , snaps and in this opening, for example. In the undercut, is arranged. In addition, the at least one inserted battery module can be released and / or released again by the release tab, for example by applying the release tab of the at least one fixing module.

Here, the release tab and the snap element are indirectly connected to each other directly or via a connecting element, wherein the release tab and the connecting element to each other at an angle greater than 0 ° and less than 180 °, in particular greater than 30 ° and less than 150 °, in particular greater than 60 ° and less than 120 Are oriented or arranged. In a possible embodiment, they are oriented or arranged substantially perpendicular to one another, ie they enclose an angle of, for example, 90 ° ± 5 °. The at least one fixing module has a connection element which is connected to the snap element, wherein the connection element is integrated into the outer wall and / or is formed as part of the outer wall. The connection element is to be connected in an alternative embodiment with the outer wall of the at least one battery module via at least one fastening means connected and / or connected. The snap element is, for example, arranged between a recess of the release tab and / or the connecting element and the connection element.

The at least one opening is formed and / or arranged in a profile of the battery box. The inner wall forms a surface of the profile. The interior of the battery box is limited by several, for example. Side inner walls. When inserting the battery module is inserted in an insertion direction in the interior.

In an embodiment, the snap element has two outer sides or legs, whereas the opening or recess has two inner sides. Each outer side gets into contact on each inner side.

In addition, a release angle ß is provided for the fixing module. An insertion angle e = 90 ° -β which can be calculated from the release angle β indicates how at least one outer side or at least one leg of the snap element and at least one inner side of the opening are oriented relative to the intended insertion direction. Here, the insertion direction is oriented in each case parallel to the outer wall and the inner wall. Accordingly, in each case an outer side of the snap element and in each case an inner side of the opening is oriented at the insertion angle of e = 90 ° -β relative to the insertion direction. Since an opening or a recess in the inner wall forms an offset to the snap element, the release angle β or insertion angle e = 90 ° -β is the same for the snap element and the opening. The system is, for example, designed for a battery box of a vehicle, for example a motor vehicle, in particular a car, and for at least one battery module for supplying the vehicle with electrical energy.

Accordingly, a battery arrangement comprises a battery box, at least one battery module and at least one embodiment of the presented system.

The system has at least one pair of a fixing module and an opening or recess, wherein the fixing module and the opening or recess of a respective pair are associated with each other and / or be. Thus, for example, it is possible that the system comprises a plurality of such pairs of one fixing module and one opening or recess each. Alternatively or additionally, it is possible that the system has an opening or recess, which are assigned to a plurality of fixing modules, wherein a corresponding plurality of snap elements along the opening snap next to each other and are arranged therein. It is conceivable that an opening is assigned a single-digit number of, for example, six to eight fixing modules and thus a single-digit number of, for example, six to eight snap elements which snap into one opening.

The method according to the invention is provided for inserting at least one battery module into a battery box and for releasing the at least one inserted battery module from the battery box. In this case, at least one fixing module is arranged on an outer wall or outer skin of the at least one battery module, and at least one opening or recess as an accommodating module for the at least one fixing module on an inner wall or inner skin of the battery box. The at least one fixing module has a resilient and / or resilient snap element, for example a detent, and a release tab. When the at least one battery module is inserted into the battery box, the snap element is snapped or snapped into the at least one opening or recess, for example an undercut, and arranged in the at least one opening. The at least one already Inserted battery module can be solved by applying the release tab again.

An application of the release tab is provided, for example, if a battery module originally inserted into the battery module is replaced by the vehicle for a long period of use, if the vehicle has traveled several distances during several journeys, or if a defect occurs or is replaced by a new battery module ,

In an embodiment, the release tab of the at least one fixing module when inserting on a portion of the inner wall, which limits the inner wall and is accessible from the outside, arranged.

In a further embodiment, the at least one fixing module is deformed when removing the at least one battery module from the interior of the battery box by acting on the release tab of the at least one fixing module, wherein the snap element is stretched.

The proposed method is, for example, provided for joining battery modules in a battery box, whereby a battery assembly or a battery for high voltages (HV battery) is provided. With one embodiment of the system, when carrying out an embodiment of the method, the at least one battery module is mounted in the battery box and also dismantled again.

In one embodiment of the system, it is possible that a connection element of a respective fixing module is adapted to attach the fixing module to a respective battery module and / or to connect with this. It is possible to form the fixing module on the outer wall, wherein the connecting element is formed as a component of the outer wall and / or integrated therein. It is also possible to separately produce a fixing module and to fix this via the connecting element on the outer wall of the battery module, whereby it is possible, inter alia, an existing battery module subsequently equip with the fixing module. It is also possible, in addition to produce a respective complete fixing module in Fierstellung the outer wall of the battery and form as part and / or additional extension of the outer wall.

When Fierstellen the inner wall of the battery box, it is also possible, the opening or recess as an undercut opening or undercut a profile, eg. An extruded profile form, this profile forms a total of a portion and / or region of the inner wall of the battery box.

In one possible embodiment, a respective fixing module is divided into three sections, which merge into one another. In this case, the connection element is flat. The subsequent snap element has, for example, two outer sides or legs, wherein each such outer side is flat and flat. However, a first outside, which is directly connected to the attachment element, to the attachment element at an obtuse angle, d. H. oriented at an angle> 90 °. In contrast, the two outer sides of the snap element to each other at an acute angle, d. H. oriented at an angle <90 °. The connecting element, which connects directly to the second outer side, in turn is oriented at an obtuse angle to this, wherein it is further provided that the connecting element is arranged parallel to the connecting element, wherein the connecting element and the connecting element are further arranged in a common plane. The release tab is oriented to the connecting element and to the connecting element in a possible embodiment at an angle of, for example, 90 ° ± 5 °. However, it is also possible that such an angle between connecting element and connecting element is larger or smaller, for example. Greater than 0 ° and smaller than 180 °.

When inserting the battery module in the battery box, usually in the interior walls bounded by internal space, this is in the Introduced inserting direction or in an insertion direction in the battery box and / or interior, wherein first the connection element, then the snap element and then the connecting element is inserted into the battery box, wherein it is further provided that the snap element disposed in the opening on the inner wall of the battery module becomes. In contrast, the release tab, accessible from the outside, outside the battery box and / or the interior of the battery box and is only on an externally accessible portion of the inner wall that limits these arranged.

To provide an embodiment of the system, a plurality of snap elements are formed on the outer wall or outer skin of the battery module, wherein a snap element is part or element of a fixing module, which is also at least partially formed on the outer wall. Usually, the outer wall of a metal sheet, for example. Steel sheet, and has a wall thickness of, for example, about 1, 5 mm. In each case, a snap element of a fixing module on the outer wall of the battery module presses this against the inner wall of the battery box and thus also against cooling channels in the battery box, which are bounded by the inner wall to the outside. By designing a respective snap element, it is possible within the scope of process limits of the presented method deviations of components from one another, ie. H. a battery module and the battery box to compensate. With snap elements of several fixing modules, it is possible to fix the battery module against cooling channels of the battery box floating. It is possible, in particular on a floor as the inner wall of the battery box to dispense with a gap between the inner wall of the battery box and the outer wall of the battery module and thus between a cooling channel and the battery module, whereby an otherwise to be used amount of thermally conductive filler or a so-called gap filler can be drastically reduced.

Furthermore, it is provided that a release tab is arranged or attached to each fixing module, wherein the snap element by the Losing the fixing module deformed, for example. Stretched and can be destroyed depending on the definition. Here, the legs of the snap element, which are originally each oriented at the insertion angle e = 90 ° - ß relative to the insertion direction, oriented at an obtuse angle relative to the insertion direction, at most largely parallel to the insertion direction and thus maximally largely parallel to the outer wall , The insertion angle e = 90 ° -β is dependent on the release angle β. A detachment or removal of a battery module from the battery box is possible, for example, in the context of an exchange of a battery module, which was inserted as part of the method in the battery box, wherein between the battery module and the battery box a connection is made. By providing the release tab, releasability of such connection between the battery module and the battery box is ensured.

In each case, a fixing module, in particular its snap element, and in each case an opening in the inner wall of the battery box form a pair of joining partners. In this case, the opening in the inner wall with a front profile and a transverse profile, for example, designed as an extruded profile with continuous undercut. The opening thus produced or a corresponding undercut is designed to receive the snap element on the outer wall of the battery module, wherein the snap element engages in the assembly or during insertion into the opening and / or behind.

By an embodiment of the method with an embodiment of the system it follows that in each case one battery module is fixed in the battery box in a floating manner and "on block" against the cooling channels. As a result, a gap between the battery module and at least one cooling channel of the battery box is reduced to a minimum, regardless of prevailing dimensional deviations.

In this case, the battery module is pressed firmly against the cooling channels, the process side, no gap is provided for the Gapfiller. In places, so it comes to putting the battery module on the cooling channels.

Now that a smaller amount of the so-called gap filler or filler material is needed, it is possible to save costs and weight. Since the battery is now connected directly to the battery box, a cooling capacity is improved by the cooling channels. In addition, it is possible to reduce a manufacturing time when joining the battery module, since in each case a battery module is merely inserted into the battery box, wherein each one arranged on a battery module snap element of a fixing automatically behind in each case an opening of the battery box. By attaching the release tab, the solubility of each battery module is guaranteed. It is possible to disassemble each one battery module without special tools in any conventional workshop and thus to remove it from the battery box. In addition, it is possible to reduce a height or z-dimension chain of the battery box or a battery assembly by a height of a screw head otherwise to be used.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the present invention.

The invention is schematically illustrated by means of embodiments in the drawings and will be described schematically and in detail with reference to the drawings.

Figure 1 shows a schematic representation of a first known from the prior art arrangement of two different perspectives.

Figure 2 shows a schematic representation of a second known from the prior art arrangement. FIG. 3 shows a schematic representation of an embodiment of the system according to the invention and an embodiment of a fixing module of this system.

The figures are described coherently and comprehensively. Like reference numerals assign the same components.

Figure 1 a shows a schematic representation of a battery box 2, as it is known from the prior art, which here has several compartments, each in a compartment, a battery module 4 can be arranged, which is indicated by Figure 1 b.

Another known from the prior art arrangement is shown schematically in Figure 2. In this case, this arrangement comprises a battery box 6, with a front profile 8 and a rear profile 10 or transverse profile. In addition, this battery box 6 has a bottom 12, in which coolant channels 14 are arranged here. In addition, a battery module 16 is arranged in the battery box 6 here, which is located between the two profiles 8, 10 and is arranged on the floor 12. An interior of the battery box 6, in which the battery module 16 is located, is here covered by a cover 18, which is screwed here with two screws 20 with the two profiles 8, 10. It is possible that the screws are designed here as so-called FDS screws. In this regard, Figure 2 also shows a flange 22 for screwing the battery module 16, a seal 24 and a spacer 26. In Figure 2, an underrun protection 28 and a protective profile 30 are further shown.

In the prior art presented here, the battery module 16 is screwed from above via the screws 20 with the profiles 8, 10. The battery module 16 is cooled from below by the cooling channels 14. In order to compensate for deviations, a certain gap is provided between the cooling channels 14 and the battery module 16, with a so-called gap filler is filled to ensure heat transfer from the battery module 16 to the cooling channels 14 can.

An embodiment of a battery arrangement 40, shown in a sectional view in FIG. 3a, has as components a battery box 42 and a battery module 44, which is arranged here in an interior of the battery box 42, this interior being enclosed by a plurality of inner walls. The battery box 42 has as components a first profile 46, in particular a front profile, and a second profile 48, in particular a transverse profile, in which case the first profile 46 is designed as a front profile and / or designate. A second profile 48 is designed and / or designated here as a transverse profile. Both profiles 46, 48 have, as described in detail below, in each case at least one opening 76 and thus in each case at least one snap-fit point for the battery module 44 to be inserted.

In addition, the battery box 42 as a further module on a bottom 50, in which several cooling channels 52 are integrated here, said cooling channels 52 pass through the bottom 50. In addition, the battery box 42 is disposed on an underrun protection 54 of a vehicle designed here as a motor vehicle and thus arranged in the vehicle. Here, between at least one profile 46, 48 and the underrun protection 54 is a protective profile 56th

In the battery box 42 is provided that lateral inner walls are formed here by the profiles 46, 48, whereas a lower inner wall is formed by the bottom 50. In addition, the battery module 44 is limited by a plurality of outer walls.

FIG. 3 a also shows two pairs of joining partners of the system according to the invention, wherein each of these two pairs has a fixing module 60 as the first joining partner, which is shown schematically enlarged in FIG. 3 b. This fixing module 60 comprises as components a flat connecting element 62, here in a first leg 64 of a Snap element 66 passes, wherein this first leg 64 merges into a second leg 68 of the snap element 66. In addition, the second leg 68 and thus also the snap element 66 passes into a connecting element 70, which in turn merges into a release tab 72 having a recess 74.

It is envisaged that the snap element 66 and thus its two legs 64, 68 are arranged between the connection element 62 and the connection element 70, wherein the connection element 62 and the connection element 70 can lie in the same plane. The two legs 64, 68 form with said plane a triangle, wherein the two legs 64, 68 are oriented here at an acute angle to each other. In this case, this acute angle is greater than a release angle ß, for example. At least twice as large as the release angle ß. In addition, the release tab 72 is oriented perpendicular to the connecting element 62 and to the connecting element 70 and also a flat component.

In addition, it is provided here that the connection element 62 is formed here as part of the outer wall of the battery module 44 and thus also integrated in this. In this case, it is also possible to produce the fixing module 60 during the production of the outer wall of the battery module 44, wherein the connecting element 62 is integrated into the outer wall, whereas the snap element 66 with the legs 64, 68, the connecting element 70 and the release tab 72 of the fixing module 60 are formed as extensions of the outer wall and / or are to be designated.

Alternatively, it is also possible in each case to produce a fixing module 60, as is shown schematically in FIG. 3 b, and to fasten it subsequently on the outer wall of the battery module 44, it being possible here to fasten the connection element 62 to the outer wall.

As further components of the system, FIG. 3a shows openings 76 as joining partners on the inner lateral walls of the battery box 42, and thus in the two profiles 46, 48, wherein in each case one profile 46, 48 passes through one lateral inner wall of the battery box 42 is limited. In each case, such an opening 76 is formed here as an undercut in the inner wall and / or in the profile 46, 48. In each case, a fixing module 60 and an opening 76 in each case form joining partners to be assigned to each other, wherein each fixing module 60 is assigned, assigned or assigned to an opening 76 or is assigned to the interior of the battery box 42 when the battery module 44 is inserted. As an alternative or in addition, it is also possible to associate a plurality of adjacently arranged fixing modules 60 with an opening 76 which extends along a respective profile 46, 48.

When inserting and / or mounting the battery module 44, this is inserted with a plurality of fixing modules 60 arranged on the outer wall in the inner space of the battery box 42 delimited by the inner walls in an insertion direction (arrow 61) parallel to the inner walls and on the floor 50 with the cooling channels 52 arranged. Meanwhile, the two legs 64, 68 of the snap element 66 snap into the openings 76 on the side inner walls, the battery module 44 being fixed in the interior of the battery box 42. In each case, a leg 64, 68 in each case on an inner side of the opening 76 in Appendix. In addition, it follows that in each case a release tab 72 on an upper portion 78 and an upper edge of a respective lateral inner wall or in each case a profile 46, 48 in Appendix and rests on it. Such a portion 78 is also referred to as a flange for a Batterieverschnappung.

A total of several, eg. Six to eight fixing modules 60 are introduced on the outer wall or outer skin of the battery module 44 at several points, each such a fixing module 60 formed as an integral part of the outer wall and prepared by a separation and / or forming process and thus produced becomes. The two profiles 46, 48, which form the lateral inner walls of the battery box 42 are formed here as extruded profiles. In this case, each one of the battery module 44 facing inside or in each case a profile 46, 48 has a continuous undercut as an opening 76 for receiving legs 64, 68 respectively a snap element 66, wherein in each case a snap element 66 engages on an outer wall of the battery module 44 in each case an opening 76 on the inner wall.

The release angle β is indicated both in FIG. 3 a and in FIG. 3 b, with a resulting insertion angle e = 90 ° -β (FIG. 3 b) orientation or inclination of the second leg 68 relative to an outer wall of the battery module 44 and relative to one Inner wall of the battery box 42 shows. The release angle β shows an orientation of the second leg 68 relative to the release tab 72. Accordingly, an inside of the opening 76 at which the first leg 68 abuts is below the insertion angle e = 90 ° -β relative to the inside of the battery box 42 or relative to the outside of the battery module 44 oriented.

In this case, the release angle β of the snap element 66 or in particular of the leg 68 and the undercut or the opening 76 is small and is, for example, 15 ° to 25 °. The resulting insertion angle e = 90 ° -β gives an orientation of at least one leg 64, 68 of the

Snap element 66 relative to the outer wall of the battery module 44 and an inner side of the opening 76 and the undercut relative to the inner wall. Due to this small release angle β, inter alia, there is no sliding of the snap element 66. Thus, a snap connection between the outer wall of the battery module 44 and the inner wall of the battery box 42, each having a pair of a fixing module 60 and an opening 76 as a joining partner, only under deformation of the fixing module 60 and thus not nondestructive solvable, resulting inter alia, the battery module 44 is securely fixed in the battery box 42 even in the event of an accident of the vehicle. In each case a release tab 72 is arranged or attached to the end of a fixing module 60. In this case, the release tab 72 is disposed outside the interior of the battery box 42 and freely accessible for disassembly of at least one battery module 44 from above. If the battery module 44 already inserted into the battery box 42 is to be removed therefrom and thus dismantled, the following steps are to be carried out.

In a first step, the entire battery assembly 40 is electrically isolated from the vehicle, this is necessary because each one battery module 44 is accessible only from above. In a second step, the release tab 72 is unfolded. In this case, the release tab 72 is, for example, bent vertically upwards with a tool designed as a screwdriver, it being possible for the release tab 72 to be gripped by the tool via its recess 74.

In a third step, the snap element 66 is deformed and destroyed depending on the definition. When the release tab 72 is bent upward, a tip of the tool, for example, designed as a screwdriver is usually inserted through the recess 74 in the release tab 72. Furthermore, the tool is manually or manually levered against the battery box 42, usually against its profiles 46, 48, wherein the snap element 66 is being pulled straight, wherein the two legs 64, 68 are arranged substantially parallel to each other in the same plane, in the the inner wall of the battery box 42 and the outer wall of the battery module 44, the connecting element 62 and the connecting element 74 are already arranged. By changing the original shape of the snap element 66 this is destroyed depending on the definition. Since the battery module 44 is usually fixed via a plurality of pairs of fixing modules 60 and openings 76 in the battery box 42, each release tab 72 is pulled out of each fixing module 60 and, depending on the definition, the snap element 66 is stretched, reshaped and / or destroyed. In order to remove a defective battery module, it is provided in a fourth step that fixing modules 60 or snap elements 66 of defective battery modules 44 are deformed and / or destroyed. Then it is possible to remove a defective battery module from the interior of the battery box 42 upwards. A possibly still existing gap filler or a corresponding thermally conductive filling material, which may still be located on the bottom 50 and / or the cooling channels 52, is usually removed in a fifth step using a sharp object. Furthermore, in a sixth step, it is optionally possible to arrange and / or apply new thermally conductive filling material, for example to apply it in order to ensure a sufficient cooling capacity of the newly inserted battery module 44, it being possible to apply such thermally conductive filling material also on a bottom of the battery module ,

In a seventh step, as already explained above, the new battery module 44 is inserted into the interior, wherein this is fixed in a plurality of fixing modules 60 in openings 76 of inner walls of the battery box 42 floating. Such insertion can be automated or manual by hand. In addition, the battery assembly thereby provided with the battery module 44, which is fixed in the battery box 42, again mounted in the vehicle or disposed therein.

With the presented system, it is possible, inter alia, to meet a central requirement for a battery assembly 40 for a vehicle, which is designed to provide a high voltage. In this case, this battery arrangement has only a small height in the z-direction (arrow 61), so that it is also suitable for a flat vehicle. Since the screws 20 are dispensed with in comparison with the prior art, it is possible to minimize the height of the battery assembly 40 in the z-direction. In addition, can be dispensed with the otherwise usual gap between the battery module 16 and the cooling channels 14 (Figure 2), since it is now possible to arrange a respective battery module 44 directly on cooling channels 52. As a result, a heat transfer between the battery module 44 and the cooling channels 52 is improved and thus also increases a cooling capacity. It is also possible to dispense with a costly introduction of the Gapfillers. Thus, weight is saved for the motor vehicle. The battery assembly 40 (Figure 3a) is now also for a flat electric vehicle suitable as a vehicle, since it is physically small in the z-direction. In addition, the insertion or joining the battery module 44 can be shortened in the battery box 42 in time, since it is no longer necessary to screw the battery module 44 via a plurality of screws with the battery box 42.

It is provided that when inserting the battery module 44 into the interior of the battery box 42 at least one fixing module 60 associated with an opening 76 and the snap element 66 is snapped into it. In this case, a fixing module 60 can be assigned to a snap-in point of an opening 76. It is also possible that in each case an opening 76 extends along each of a profile 46, 48 elongated. In this case, it is possible for an opening 76 to be assigned a plurality of adjacently arranged fixing modules 60, with each snap element 66 being snapped along the opening 76 into this opening 76 at a plurality of snap-fit points next to one another.

REFERENCE NUMBER:

2 battery box

4 battery module

6 battery box

8, 10 profile

12 floor

14 cooling channel

16 battery module

18 lids

20 screw

22 flange

24 seal

26 spacers

28 Underride protection

30 protection profile

40 battery arrangement

42 battery box

44 battery module

46, 48 profile

50 floor

52 cooling channel

54 Underride protection

56 protection profile

60 fixing module

61 arrow

62 connection element

64 thighs

66 snap element

68 thighs

70 connecting element

72 release tab

74 recess

76 opening

78 section

Claims

CLAIMS:

A system for inserting at least one battery module (44) into a battery box (42) and for releasing the at least one inserted battery module (44) from the battery box (42), the system comprising at least one fixing module (60) on at least one outer wall of the at least one battery module (44) and at least one opening (76) on at least one inner wall of the battery box (44), wherein the at least one fixing module (60) has a snap element (66) and a release tab (72), wherein the snap element (66) in a Inserting the at least one battery module (44) into the battery box (42) snaps into the at least one opening (76) and is arranged in the at least one opening (76), the at least one inserted battery module (44) being actuated by applying the release tab (72 ) of the at least one fixing module (60) is releasable.

The system of claim 1, wherein the release tab (72) and the snap element (66) are interconnected.

A system according to claim 1 or 2, wherein the at least one fixing module (60) comprises a connection element (62) connected to the snap element (66), wherein the connection element (62) is integrated in the outer wall.

A system according to any one of the preceding claims, wherein the at least one aperture (76) is formed in a profile (46, 48) bounded by the inner wall of the battery box (42).

System according to one of the preceding claims, in which the snap-in element (66) has two outer sides (64, 68), wherein the at least one opening (76) has two inner sides, wherein one outer side abuts against one inner side in each case.

6. System according to any one of the preceding claims, wherein for the at least one fixing module (60) a release angle ß is provided.

7. System according to one of the preceding claims, which is designed for a battery box (42) of a vehicle and for at least one battery module (44) for supplying the vehicle with electrical energy.

8. A method for inserting at least one battery module (44) into a battery box (42) and for releasing the at least one inserted battery module (44) from the battery box (42), wherein on an outer wall of the at least one battery module (44) at least one fixing module ( 60), wherein an inner wall of the battery box (44) at least one opening (76) is arranged, wherein the at least one fixing module (60) has a snap element (66) and a release tab (72), wherein the snap element (66) when the at least one battery module (44) is inserted into the battery box (42), snapped into the at least one opening (76) and placed in the at least one opening (76), wherein the at least one inserted battery module (42) is replaced by the release tab ( 72) of the at least one fixing module (60) can be solved.

9. The method of claim 8, wherein the release tab (72) of the at least one fixing module (60) when inserting on a portion (78) of the inner wall is arranged.

10. The method of claim 8 or 9, wherein the fixing module (60) upon removal of the at least one battery module (44) from the battery box (42) by applying the release tab (72) is deformed.