BATTERY MODULE, METHOD FOR THE PRODUCTION THEREOF AND BATTERY

Description

State of the art

[0001] The invention is based on a battery module according to the preamble of the independent claim. Furthermore, the invention relates to a method for producing such a battery module and a battery.

[0002] It is known from the prior art that batteries, in particular lithium-ion batteries, consist of at least one battery module or, advantageously, a plurality of battery modules. Furthermore, a battery module preferably comprises a plurality of individual battery cells that are interconnected to form the battery module, wherein the individual battery cells can be interconnected in series or in parallel.

[0003] State of the art includes, for example, DE 10 2013 207 357 A1, which discloses a cell contacting system, or DE 10 2013 213 848 A1, which discloses a battery module with a number of electrically interconnected battery cells. Disclosure of the invention

[0004] A battery module with the features of the independent claim has the advantage that at least one electrical or electronic element is protected from external influences during operation of the battery module. In particular, adhesion of particles to the at least one electrical or electronic element can be reduced. Furthermore, damage caused by mechanical stress can be reduced. As a result, the service life of the at least one electrical and electronic element can be extended and, associated with this, the service life of the battery module as well. Furthermore, the at least one electrical component or the at least one electronic component is arranged in the battery module after assembly in such a way that gravity additionally impedes the adhesion of particles.

[0005] For this purpose, a battery module is provided. The battery module comprises a battery module housing which is designed to accommodate a plurality of battery cells. The battery module further comprises a cover element which has a housing wall with a first surface and a second surface. The second surface is arranged on a side of the housing wall opposite the first surface. Furthermore, the cover element of the battery module housing is designed such that, in an assembled state, the first surface is arranged adjacent to an area surrounding the battery module housing and the second surface is arranged adjacent to the battery cells of the battery module. At least one electrical or electronic element can be connected to the second surface.Furthermore, at least one electrical or electronic element can be integrated into the housing wall of the cover element in such a way that its electrical or electronic components are arranged on the second surface.

[0006] The at least one electrical element comprises a cell connector, and the at least one electronic element comprises a circuit board, which are connected to one another by means of a cell contact system. The housing wall covers the at least one electrical or electronic element from the environment in those regions of the first surface that are arranged opposite the regions of the second surface covered by the at least one electrical or electronic element.

[0007] The measures listed in the dependent claims enable advantageous further developments and improvements of the device specified in the independent claims or of the method specified in the independent claim.

[0008] In particular, by connecting the at least one electrical element or the at least one electronic element to the cover element or integrating them into the cover element, an additional cover element can be dispensed with. Furthermore, the size and thus the cost of the cover element can be reduced.

[0009] Preferably, the at least one electrical element can further comprise a busbar. An electrical element is understood to be an element that conducts electrical current and has a defined resistance. This makes it possible to protect the at least one electrical element of a battery module from external influences, such as the entry and adhesion of particles, by connecting it to the second surface of the cover element of the battery module housing or integrating it into the cover element so that the electrical components are arranged on the second surface. Furthermore, the housing wall can ensure electrical insulation of the at least one electrical element from the environment and thus increase safety.

[0010] Preferably, the at least one electronic element can further comprise a relay and a fuse. An electronic element is understood to be an element that can regulate and / or monitor the battery module by actively influencing the flow of electrical current. In particular, in the case of the components of the circuit board, the adhesion of particles leads to a reduction in service life or a reduction in performance. Thus, the probability of particle adhesion can be reduced by connecting the at least one electronic element to the second surface of the cover element of the battery module housing or by integrating it into the cover element so that the electronic components are arranged on the second surface. This may make it possible to dispense with further measures to protect the electronic components from particle adhesion.Furthermore, the housing wall protects at least one electronic element from mechanical influences.

[0011] It is expedient if the cover element has at least one voltage tap arranged on the first surface. In particular, the cover element has a positive voltage tap and a negative voltage tap. The cover element is preferably designed such that the entire voltage supplied by the battery cells of the battery module can be tapped at the positive voltage tap and the negative voltage tap. For this purpose, the voltage taps of the individual battery cells are advantageously connected to one another and to the at least one voltage tap arranged on the first surface via cell connectors and / or busbars. The battery cells can be connected in series or in parallel. Furthermore, it is possible to combine serial and parallel connections.

[0012] According to one aspect of the invention, it can be provided that the housing wall has at least one opening. The at least one opening is designed to accommodate a voltage tap of a battery cell of the battery module. In this case, the at least one opening can be closed on the side of the first surface by a cover element. This has the advantage that the cover element can be connected to the housing of the battery module and the voltage taps of the battery cells are still accessible from the environment of the battery module. This makes it possible to reliably connect a voltage tap to a cell connector. This enables direct contact between the cell connector and the voltage tap of the battery cell after the cover element has been connected to the battery module.In particular, the cell connector is connected to the cover element or integrated into it, as already described above, wherein the cell connector further comprises a connection region which is not connected to the cover element or is integrated into it and which is designed for connection to a voltage tap. The voltage tap and the connection region of the cell connector can then be connected to one another, for example by laser welding. It is expedient if the connection region of the cell connector is arranged within the at least one opening or in the region of the at least one opening on the side of the second surface, so that a simple connection is possible. After the voltage tap and the cell connector are connected to one another, the at least one opening, in which the voltage tap connected to the cell connector is now arranged, can be closed by a cover element.This protects the battery cell's voltage tap from external influences, such as mechanical stress and the ingress of dirt or particles. In particular, this also protects the connection between the cell connector and the battery cell's voltage tap from external influences. Advantageously, the cover element is made of or comprises an electrically insulating material. This allows the cover element to isolate the voltage tap from the battery module's surroundings, thereby increasing safety.

[0013] It is advantageous if the cover element has a seal arranged all the way around the cover element. The cover element can be connected to the battery module reversibly or irreversibly in such a way that, in an assembled state, the seal seals off an interior space accommodating the battery cells from the environment of the battery module. In this context, an irreversible connection means that the cover element and the housing of the battery module are joined together by material-to-material joining processes such as welding, soldering, or gluing. In this context, a reversible connection means that the cover element and the housing of the battery module are joined together by a detachable connection such as screwing or clipping. The clipping can be designed in such a way that the clips break off when opened, thus making it possible to prove, for example, deliberate opening.

[0014] It is expedient if a positioning element is also connected to the second surface, which positioning element is designed to fasten the at least one electrical element or the at least one electronic element to the second surface. The positioning element is designed in such a way that the fastening takes place by remelting the material of the positioning element. This allows the electrical element or the electronic element to be connected to the second surface in a simple manner, in particular before the cover element is connected to the battery module housing. Remelting should be understood here to mean that the positioning element is heated to a temperature which is above the melting temperature of the material of the positioning element, as a result of which the shape of the positioning element can be changed.

[0015] Furthermore, it is also expedient if the cover element has at least one fastening means designed to secure the cover element to the battery module housing. The fastening means can be connected to the battery module housing. The fastening means can, in particular, be an opening, a projection, or a locking element. This allows a simple connection between the cover element and the battery module housing to be established. In particular, complex manufacturing processes for material-to-material connection, such as welding, can be dispensed with.

[0016] An embodiment of a battery module according to the invention can simplify its manufacture. In particular, the production of the serial and / or parallel interconnection of the battery cells and their contacting by a printed circuit board during assembly is simplified because electronic elements can already be integrated into the cover element. Furthermore, it is possible to connect the electrical and / or electronic elements required for controlling and / or regulating a battery module and for interconnecting the battery cells to the cover element before the battery module is assembled, or to integrate them into it and interconnect them. This can reduce the assembly effort compared to conventional assembly, i.e., assembly with battery cells already arranged in the housing, because the cover element is not yet assembled and is therefore easily accessible for assembly steps.

[0017] Furthermore, the reduced weight of the lid element simplifies handling during production.

[0018] Furthermore, the only assembly step after the arrangement of the cover element can only involve connecting the voltage taps of the battery cells to the cell connectors and covering the openings with a cover element.

[0019] The invention further relates to a method for producing a battery module. For this purpose, in a first step, the battery cells are arranged in a housing, and in a second step, the housing is closed with the cover element such that the battery cells are electrically connected to one another in series or parallel. In particular, the cover element can further comprise an opening designed to receive a voltage tap of a battery cell. In this case, the second step further comprises receiving the voltage tap of the battery cell of the battery module in the at least one opening and connecting the voltage tap to a cell connector.

[0020] It is advantageous if, prior to the second step, the at least one electrical element or the at least one electronic element is also fastened to the second surface of the cover element. To fasten the at least one electrical element or the at least one electronic element to the second surface, the positioning element is remelted, i.e. heated to a temperature which is above the melting temperature of the material of the positioning element. The electrical element or the electronic element has at least one opening and after remelting, i.e. in a state in which the electrical element or the electronic element is fastened to the second surface, the positioning element has a first section and a second section. The first section of the positioning element is arranged running in the opening and connected to the second surface of the cover element.The second portion of the positioning element is arranged outside the opening and at least partially contacts a surface of the electrical element or the electronic element.

[0021] As a result, the electrical element or the electronic element is attached to the second surface of the cover element.

[0022] It is also advantageous if, in the second step, the fastening means of the cover element is further connected to the battery module housing, whereby the connection is formed.

[0023] A battery module according to the invention can be used for batteries in mobile applications, in particular in electric vehicles and e-bikes, and for batteries for use in stationary operation. Short description of the drawings

[0024] Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. It shows

[0025] Figure 1 a schematic representation of a battery module according to the invention, Figure 2 an embodiment of a cover element in a perspective top view, Figure 3 an embodiment of a lid element with a cover element in a perspective top view, Figure 4 an embodiment of a cover element in a perspective view from below, Figure 5 a section of a lid element with an opening in a perspective view from below, Figure 6 another embodiment of a cover element with positioning elements in a perspective view from below, Figures 7a to 7c a possibility of attaching an electrical element or an electronic element to the cover element by remelting a positioning element, Figure 8 an embodiment of a cover element with fastening means in a perspective top view, Figure 9an embodiment of a battery module housing with fastening means in a perspective top view, Figure 10 an embodiment of a battery module housing with further fastening means in a perspective view and Figure 11 a cover element connected to the battery module housing.

[0026] The Figure 1 shows a schematic representation of a battery module according to the invention with a cover element 1 of a battery module housing 2.

[0027] The battery module housing 2 comprises a housing 3 in addition to the cover element 1. The housing 3 essentially comprises a housing base 4 and a plurality of side walls 5. The Figure 1 also shows the battery module housing 2 in a side view, wherein the front side wall 5 is not shown in order to be able to recognize the interior of the housing 3.

[0028] The battery module housing 2 is designed to accommodate a plurality of battery cells 6. In the Figure 1 It is shown that three battery cells 6 are accommodated in the battery module housing 2, in particular in the housing 3. Since the Figure 1 Although only a cover element 1 is to be described schematically, it is self-evident that the design of the housing 3 and the number of battery cells 6 shown there are not to be considered limiting for the invention. The battery cells 6 each have a voltage tap 24, in particular a positive voltage tap 25 and a negative voltage tap 26.

[0029] As in the Figure 1 As shown, the cover element 1 has a housing wall 7. The housing wall 7 has a first surface 8 and a second surface 9. Furthermore, Figure 1 It is shown that the second surface 9 is arranged on a side of the housing wall 7 opposite the first surface 8. The reverse is also true, of course.

[0030] To connect the cover element 1 to the housing 3, the cover element 1 is displaced in the direction 10 shown without rotating the cover element 1. As a result, the first surface 8 is arranged adjacent to an area 11 of the battery module housing 2. Furthermore, the second surface 9 is arranged adjacent to the battery cells 6 of the battery module.

[0031] In particular, at least one electrical element 12 is connected to the second surface 9. Furthermore, in particular, at least one electronic element 13 is connected to the second surface 9. Furthermore, it is also possible for the at least one electrical element 12 or the at least one electronic element 13, as shown by reference numeral 14, to be integrated into the housing wall 7. The integration is designed such that the electrical or electronic components 15 of the at least one electrical element 12 or of the at least one electronic element 13, which is to be clarified by reference numeral 15, are arranged on the second surface 9.

[0032] The at least one electrical element 12 or the at least one electronic element 13 cover the second surface 9, as can be seen from Figure 1can be seen, at least in regions. At least one region 16 of the first surface 8 is arranged opposite this region of the second surface 9 covered in this way. The intersection points of the Figure 1The dashed lines 17 shown and the surface 8 are intended to clarify the delimitation of the area 16. The housing wall 7 covers the at least one electrical element 12 or the at least one electronic element 13 in those areas 16 of the first surface 8 towards the environment 11. In particular, the volume lying within the dashed lines 17 and the first surface 8 as well as the second surface 9 and at least partially filled by the material of the housing wall 7 covers the at least one electrical element 12 or the at least one electronic element 13 towards the environment 11. The dashed line 17 is arranged perpendicular to the second surface 9. Furthermore, it is possible for the dashed line 17 to also be arranged at an angle to the first surface 9.

[0033] The Figure 2shows an embodiment of a cover element 1 in a perspective top view, wherein the housing 3 of the battery module housing 2 together with the battery cells 6 arranged therein is not shown.

[0034] In this case, Figure 2 the first surface 8 can be seen. Furthermore, the cover element 1 has a positive voltage tap 20 arranged on the first surface 8. Furthermore, the cover element 1 has a negative voltage tap 19 arranged on the first surface 8. The positive voltage tap 20 and the negative voltage tap 19 serve to allow a consumer to tap the entire voltage generated by the battery cells 6, in particular the positive and negative voltages, respectively.

[0035] Furthermore, the Figure 2 It can be seen that the cover element 1 has a plug-in element 21, which serves as an interface for connecting the battery module to a vehicle not shown here.

[0036] The housing wall 7 of the cover element 1 of the battery module housing 2 has at least one opening 23. In particular, the Figure 2 The cover element 1 shown has, for example, thirteen openings 23. The at least one opening 23 is designed to receive a voltage tap 24. In particular, the opening 23 is designed to receive a positive voltage tap 25 and a negative voltage tap 26. The at least one voltage tap 24, 25, 26 can be connected to a cell connector 34, which will be described later.

[0037] The Figure 3 shows an embodiment of a lid element 1 with a cover element 27 in a perspective top view.

[0038] This corresponds to Figure 3 shown cover element 1 corresponds to the Figure 2shown cover element 1, the only difference being that a cover element 27 closes the at least one opening 23 on the side of the first surface 8. In particular, a first cover element 28 closes seven openings 23, as can be seen from the comparison of Figures 2 and 3 In particular, a second cover element 29 closes six openings 23, as can be seen from the comparison of Figures 2 and 3 can be seen. The at least one cover element 27, 28, 29 is formed from an electrically insulating material or comprises an electrically insulating material.

[0039] Furthermore, the representation of the lid element in Figure 3 compared to Figure 2 rotated so that the Figure 3 It can be seen that the cover element 1 has a control element 22. The control element 22 has a fuse 30 and a relay 31, the design of which is explained below in the description of Figure 4described.

[0040] The Figure 4 shows an embodiment of a cover element 1 in a perspective view from below.

[0041] This means that Figure 4 in contrast to the Figures 2 and 3 the second surface 9 of the housing wall 7 can be seen. Electrical elements 12 and electronic elements 13 are arranged on the second surface 9 of the housing wall 7, which will be discussed in detail below.

[0042] The cover element 1 has, as already shown Figure 3As can be seen, a control element 22. The control element 22 has a fuse 30 and a relay 31. The relay 31 is connected to the cover element 1 in a particularly reversible manner; for example, the relay 31 can be clipped to the cover element 1. Furthermore, this connection can also be irreversible if replacement is not necessary. The fuse 30 is preferably welded to the relay 31. Furthermore, the fuse 30 is welded to a positive busbar 32.

[0043] Furthermore, a printed circuit board 33 is connected to the second surface 9 of the housing wall 7 of the cover element 1 or integrated into the housing wall 7.

[0044] Furthermore, the Figure 4 It can be seen that the housing wall 7 has at least one opening 23. In particular, the housing wall 7 of the Figure 4 The cover element 1 shown has thirteen openings 23. From the comparison of the Figures 2 and 4 it becomes clear that the at least one opening 23 is designed to run continuously through the housing wall 7.

[0045] The connections between the busbars and relay 31 and between the busbars and the busbar can be made in a pre-assembly step.

[0046] Furthermore, the Figure 4 that the cover element 1 has a seal 38 arranged on the second surface 9 of the housing wall 7. The seal 38 is arranged circumferentially on the first surface 9. As a result, the seal can seal an interior of the battery module from the environment 11. A seal 38 can be omitted if the interior of the battery module can be sealed in another way. For example, if the cover element 1 is glued to the housing 3, the adhesive can provide a seal.

[0047] A cell connector 34 is arranged in the at least one opening 23 of the housing wall 7, even before the cover element 1 is connected to the housing 2. The cell connectors 34 can be connected to the cover element 1 in a particularly reversible manner, such as by clipping. The method described below Figure 5 is intended to illustrate the connection of the cell connector 34 with a voltage tap 24, 25, 26.

[0048] The Figure 5 shows a section of a cover element 1 with an opening 23 in a perspective view from below.

[0049] In this case, Figure 5 The circuit board 33 can be partially seen. Furthermore, the second surface 9 of the housing wall 7 can be seen.

[0050] The cell connector 34 is partially connected to the second surface 9 of the housing wall 7, as reference numerals 91 and 92 are intended to illustrate. The cell connector 34 has, in particular, a first side 35, which is configured for connection to a positive voltage tap 25 of a battery cell 6. The cell connector 34 has, in particular, a second side 36, which is configured for connection to a negative voltage tap 26 of a battery cell 6.

[0051] In particular, the first side 35 and / or the second side 36 of the cell connector 34 each have an opening 37. The opening 37 is designed to accommodate a positive voltage tap 25 or a negative voltage tap 26. Therefore, when the cover element 1 is connected to the housing 2, the at least one voltage tap 24, in particular the positive voltage tap 25 or the negative voltage tap 26, is accommodated in the opening 23 of the housing wall 7 of the cover element 1 and the opening 37 of the first side 35 or the second side 36 of the cell connector 34. Since the opening 23 of the housing wall 7 is accessible from the surroundings 11 of the battery module housing 2, a connection can be established, in particular by laser welding, between the at least one voltage tap 24, in particular the positive voltage tap 25 or the negative voltage tap 26, and the cell connector 34, in particular the first side 35 or the second side 36.Then it is advantageous as in . Figure 3 shown the opening 23 to the environment 11 is closed by a cover element 27, 28, 29.

[0052] In particular, other designs of the cell connector 34 are also possible which do not have an opening 37.

[0053] Furthermore, the Figure 5 It can be seen that the circuit board 33 and the cell connector 34 are connected by a cell contacting element 39. The connection between the cell contacting element 39 and the circuit board 33, as well as between the cell contacting element 39 and the cell connector 34, can be established, for example, by laser bonding.

[0054] The Figure 6 shows a further embodiment of a cover element 1 in a perspective view from below.

[0055] The Figure 6shown further embodiment of the cover element 1 has positioning elements 41. The positioning elements 41 are arranged on the second surface 9 and in particular connected to the second surface 9 of the cover element 1. The positioning elements 41 are designed to fasten the at least one electrical element 12 or the at least one electronic element 13 to the second surface 9. The Figure 6 The positioning elements 41 shown are preferably designed for fastening an electronic circuit board.

[0056] Based on the Figures 7a to 7c The fastening of the at least one electrical element 12 or the at least one electronic element 13 to the second surface 9 by remelting the positioning elements 41 is to be described.

[0057] The Figure 7ashows a section of a cross-section through the cover element 1, wherein a positioning element 41 is arranged on the second surface 9, wherein the positioning element 41 is in particular connected to the second surface 9. The positioning element 41 is shown in a not yet remelted state.

[0058] Furthermore, the Figure 7athe electrical element 12 or the electronic element 13, which is to be fastened to the second surface 9 of the cover element 1. The electrical element 12 or the electronic element 13 has an opening 42 which is designed such that the electrical element 12 or the electronic element 13 can be pushed in the direction 43 shown towards the cover element 1 until a contact surface 44 of the electrical element 12 or the electronic element 13 at least partially contacts the second surface 9 of the cover element 1. In other words, this means that cross-sectional areas of the opening 42 arranged perpendicular to the direction 43 shown are larger than cross-sectional areas of the positioning element 41 arranged perpendicular to the direction 43 shown. As a result, the positioning element 41 is, after the electrical element 12 or the electronic element 13 has been pushedof the electronic element 13 is arranged at least partially in the opening 42, which in the . Figure 7b is shown. The Figure 7b thus shows the arrangement immediately before the remelting of the positioning element 41, after which the electrical element 12 or the electronic element 13 was displaced in the direction 43 shown in the direction of the cover element 1.

[0059] To secure the electrical element 12 or the electronic element 13, the positioning element 41 is heated to a temperature above the melting temperature of the material of the positioning element 41. This allows the positioning element 41 to be deformed due to gravity or a manually applied force. It should be noted at this point that the force of gravity acts in the direction 43 shown.

[0060] The Figure 7cshows an electrical element 12 or electronic element 13 fastened to the second surface 9 of the cover element 1. The positioning element 41 has a first section 45 which is arranged to run in the opening 42. The first section 45 is also connected to the second surface 9 of the cover element 1. Furthermore, the positioning element 41 has a second section 46 which is arranged outside the opening 42 and is connected to the first section 45. The second section 46 at least partially contacts a surface 47 of the electrical element 12 or the electronic element 13, wherein the surface 47 is preferably arranged on a side of the electrical element 12 or the electronic element 13 opposite the contact surface 44.In other words, this means that the cross-sectional area of ​​the positioning element 41 perpendicular to the direction 43 shown in the plane of the contact surface 47 is larger than the cross-sectional area of ​​the opening 42, whereby the electrical element 12 or the electronic element 13 is attached to the second surface 9.

[0061] The Figure 8 shows an embodiment of a cover element 1 in a perspective top view, wherein the Figure 8 shown cover element 1 has fastening means 50.

[0062] The fastening means 50 are designed as openings 51 and are designed to connect the cover element 1 to a battery module housing 2.

[0063] The Figure 9shows a battery module housing 2 in which a plurality of battery cells 6 are accommodated. The battery cells 6 each have a voltage tap 24, in particular a positive voltage tap 25 and a negative voltage tap 26. Furthermore, the Figure 9 The battery module housing 2 shown has fastening means 52. The fastening means 52 of the battery module housing 2 are designed as locking elements 53.

[0064] For reversible connection of the Figure 8 shown cover element 1 with the one shown in the Figure 9In the battery module housing 2 shown, the fastening means 50 of the cover element 1 are connected to the fastening means 52 of the battery module housing 2. In particular, the locking elements 53 engage in the openings 51, so that the locking elements 53 can prevent the cover element 1 from being lifted off, i.e., from being displaced in a direction perpendicular to the first surface 8. This should be understood to mean that the locking elements 53 have a first section and a second section. The first section is connected to the battery module housing 2 and is arranged to extend at least partially within the opening 51 of the cover element 1. The second section of the locking element 53 is arranged outside the opening 51 and has a projection, wherein the projection at least partially contacts the first surface 8 of the cover element 1.Preferably, the reversible connection is designed such that the locking elements 53 can be clipped or snapped into the openings 51. This should be understood to mean that the locking elements 53 can be temporarily deformed during the connection to engage the opening and then return to their original shape.

[0065] The Figure 10 shows a further embodiment of the battery module housing 2 with a fastening means 52, wherein in the Figure 10 shown embodiment, the fastening means 52 of the battery module housing 2 in contrast to the one in the Figure 9 shown embodiment is designed as an opening 54. The opening 54 is delimited by four housing walls 55.

[0066] The Figure 11 shows a sectional view through a cover element 1 and a battery module housing 2 according to the Figure 10, which are connected to each other. The cover element 1 has a fastening means 50, which is designed as a locking element 56. The locking element 56 has a first section 561, which is connected to the cover element 1, in particular the second surface 9, and is arranged to run at least partially in the opening 54 of the battery module housing 2. Furthermore, the locking element 56 has a second section 562, which is arranged outside the opening 54 and a projection 563. The projection 563 at least partially contacts a surface 571 of one of the housing walls 55, which form the opening 54. The one of the housing walls 55, which has the surface 571 at least partially contacted by the projection 563, is in the Figures 10 and 11 each designated by the reference numeral 57.

[0067] Preferably, the surface 571 is arranged opposite a surface 572 which faces the cover element 1.

Claims

1. Battery module comprising a battery module housing (2) in which a plurality of battery cells (6) are accommodated, comprising a cover element (1) of the battery module housing (2), wherein the cover element (1) has a housing wall (7) with a first surface (8) and a second surface (9) arranged on a side of the same housing wall (7) that is situated opposite the first surface (8), and the cover element (1) of the battery module housing (2) is formed in such a way that the first surface (8) is arranged adjacent to the surroundings (11) of the battery module housing (2) and the second surface (9) is arranged adjacent to battery cells (6) of the battery module accommodated in a housing (3) of the battery module housing (2), wherein the housing (3) of the battery module housing (2) comprises a housing base (4) and a plurality of side walls (5), and the cover element (1) closes the housing (3) in such a way that the plurality of battery cells (6) are electrically connected to each other in series and / or in parallel, wherein at least one electrical element (12) and at least one electronic element (13) are mechanically connected to the second surface (9) and / or at least one electrical element (12) and electronic element (13) are integrated into the housing wall (7) of the cover element (1) in such a way that their electrical or electronic components (15) are arranged on the second surface (9), wherein the at least one electrical element (12) comprises cell connectors (34) and the at least one electronic element (13) comprises a printed circuit board (33), wherein the cell connectors (34) and the printed circuit board (33) are connected to each other by means of a cell contacting element (39), and the housing wall (7), in those regions (16) of the first surface (8) which are arranged situated opposite the regions of the second surface (9) that are covered by the at least one electrical element (12) or the at least one electronic element (13), covers the at least one electrical element (12) or electronic element (13) with respect to the surroundings (11).

2. Battery module according to Claim 1, characterized in that the at least one electrical element (12) further comprises a busbar (32) and the electronic element (13) further comprises a relay (31) and a fuse (30).

3. Battery module according to either of the preceding claims, characterized in that the cover element (1) has at least one voltage tap (19, 20) arranged on the first surface (8), in particular a positive voltage tap (20) and a negative voltage tap (19).

4. Battery module according to any of the preceding claims, wherein the housing wall (7) has at least one opening (23), which is designed for receiving a voltage tap (24, 25, 26) of a battery cell (6) of the battery module, characterized in that the at least one opening (23), on the side of the first surface (8), can be closed by a covering element (27, 28, 29) which is formed, in particular, from an electrically insulating material or contains an electrically insulating material.

5. Battery module according to any of the preceding claims, characterized in that the cover element (1) has a seal (38) arranged circumferentially on the cover element (1) and the cover element (1) can be reversibly or irreversibly connected to a housing (2) of the battery module in such a way that, in an assembled state, the seal (38) seals off an interior space accommodating the battery cells (6) from the surroundings (11) of the battery module.

6. Battery module according to any of the preceding claims, characterized in that a positioning element (41) is further connected to the second surface (9) and is designed for connecting the at least one electrical element (12) or the at least one electronic element (13) on the second surface (9) by remelting the material of the positioning element (41).

7. Battery module according to any of the preceding claims, wherein the cover element (1) has at least one fastening means (50) designed for fastening the cover element (1) to the battery module housing (2), in particular an opening (51), a projection (563) or a latching element (56), characterized in that the fastening means (50) is connected to the housing (3) of the battery module housing (2).

8. Method for producing a battery module according to any of Claims 1 to 7, wherein in a first step battery cells (6) are arranged in a housing (3) of a battery module housing (2), wherein the housing (3) of the battery module housing (2) comprises a housing base (4) and a plurality of side walls (5), and in a second step the housing (3) is closed by way of a cover element (1) of the battery module housing (2) in such a way that the battery cells (6) are electrically interconnected with each other in series and / or in parallel, wherein the cover element (1) has a housing wall (7) with a first surface (8) and a second surface (9) arranged on a side of the same housing wall (7) that is situated opposite the first surface (8), and the cover element (1) of the battery module housing (2) is arranged in such a way that the first surface (8) is arranged adjacent to the surroundings (11) of the battery module housing (2) and the second surface (9) is arranged adjacent to battery cells (6) of the battery module accommodated in a housing (3) of the battery module, wherein at least one electrical element (12) and at least one electronic element (13) are mechanically connected to the second surface (9) and / or at least one electrical element (12) and electronic element (13) are integrated into the housing wall (7) of the cover element (1) in such a way that their electrical or electronic components (15) are arranged on the second surface (9), wherein the at least one electrical element (12) comprises cell connectors (34) and the at least one electronic element (13) is a printed circuit board (33), wherein the cell connectors (34) and the printed circuit board (33) are connected to each other by means of a cell contacting element (39), and the housing wall (7), in those regions (16) of the first surface (8) which are arranged situated opposite the regions of the second surface (9) that are covered by the at least one electrical element (12) or the at least one electronic element (13), covers the at least one electrical element (12) or electronic element (13) with respect to the surroundings (11).

9. Battery comprising a battery module according to any of Claims 1 to 7.