阅读说明：本技术 电池模块控制器、其在另外元件处的布置及两者连接方法 (Battery module controller, arrangement thereof at a further element and method for connecting the two ) 是由 M.吕克 E.伯肯哈根 M.克内泽尔 A.科汉斯基 于 2019-08-02 设计创作，主要内容包括：本发明涉及一种电池模块控制器、其在另外元件处的布置及两者连接方法。该控制器用于为了车辆的驱动所设置的电池模块(10),其带有至少一个壳体(18)、带有至少一个冷却剂流体引导部(38)以及至少一个电气接口(50),其中,在控制器(12)的至少一个连接侧(14,16)处设置有用于与其他元件(36)建立插接-流体连接的冷却剂-联结器件(58)和用于与其他元件(36)建立插接-电连接的至少一个接口-联结器件(52),其中,插接-流体连接和插接-电连接具有相同的插接-连接方向(S)。本发明此外涉及这样的控制器(12)在电池模块(10)处的一种布置以及一种用于在这样的控制器(12)与电池模块(10)之间建立连接的方法。(The invention relates to a battery module controller, its arrangement at a further element and a method for connecting the two. The control unit is used for a battery module (10) provided for driving a vehicle, having at least one housing (18), having at least one coolant fluid guide (38) and having at least one electrical interface (50), wherein a coolant coupling means (58) for establishing a plug-in fluid connection with a further element (36) and at least one interface coupling means (52) for establishing a plug-in electrical connection with the further element (36) are provided on at least one connection side (14,16) of the control unit (12), wherein the plug-in fluid connection and the plug-in electrical connection have the same plug-in connection direction (S). The invention further relates to an arrangement of such a controller (12) at the battery module (10) and to a method for establishing a connection between such a controller (12) and the battery module (10).)

1. A control unit for a battery module (10) provided for driving a vehicle, having a housing (18), having at least one coolant fluid guide (38) and having at least one electrical connection (50), characterized in that a coolant coupling means (58) for establishing a plug-in fluid connection with a further element (36) and at least one interface coupling means (52) for establishing a plug-in electrical connection with the further element (36) are provided on at least one connection side (14,16) of the control unit (12), wherein the plug-in fluid connection and the plug-in electrical connection have the same plug-in connection direction (S).

2. Control according to the preceding claim, characterized in that the housing (18) is fixedly connected with at least one separate profile element (24, 30), at the end side (26) of which a coolant coupling means (58) and/or an interface coupling means (52) is provided.

3. The control device according to one of the preceding claims, characterized in that at least two profile elements (24, 30) are provided in each case outside the housing (18), wherein the profile elements (24, 30) are fixedly connected to the housing (18), and wherein at least one coolant coupling means (58) and/or interface coupling means (52) is provided at the end side at each of the profile elements (24, 30).

4. A control according to any preceding claim, characterised in that mechanical coupling means (28) are provided which enable the control (12) to be mechanically coupled with other elements (36).

5. A control according to the preceding claim, characterised in that a protrusion (74) and/or a recess (76) is provided as a mechanical coupling means (28).

6. Control according to the preceding claim, characterized in that a hole (78) is formed in the projection (74) and/or in the region around the recess (76) in each case, such that a mechanical connection between the control (12) and the further element (36) can be established by inserting a locking element (80).

7. An arrangement of a control unit (12) and a further element (36) according to one of the preceding claims, wherein at least one coolant coupling means (58) for establishing a plug-fluid connection with the control unit (12) and at least one interface coupling means (52) for establishing a plug-electrical connection with the control unit (12) are provided on at least one connection side (14,16) of the further element (36), wherein the plug-fluid connection and the plug-electrical connection have the same plug-connection direction (S), characterized in that the connection side (14) of the control unit is arranged in such an orientation relative to the connection side (16) of the further element (36) that a direct plug-fluid connection and a direct plug-electrical connection are established between the control unit (12) and the further element (36) And (4) connecting.

8. An arrangement according to the preceding claim, characterized in that a mechanical connection is additionally established between the controller (12) and the further element (36) via at least one mechanical coupling means (28).

9. Method for connecting a controller (12) according to one of claims 1 to 6 with a further element (36), wherein at least one coolant coupling means (58) for establishing a plug-in fluid connection with the controller (12) and at least one interface coupling means (52) for establishing a plug-in electrical connection with the controller (12) are provided on at least one connection side (14,16) of the further element (36), wherein the plug-fluid connection and the plug-electrical connection have the same plug-connection direction (S), characterized in that the control device (12) and the further element (36) are moved relative to one another in the plug-connection direction (S) in such a way that a plug-fluid connection and a plug-electrical connection are established.

10. Method according to the preceding claim, characterized in that additionally a mechanical connection is established between the controller (12) and the further element (36).

Technical Field

The invention relates to a controller for a battery module (in particular a high-voltage battery module) provided for driving a vehicle, to the arrangement of such a controller at a further element (in particular a battery module), and to a method for establishing a connection between such a controller and a further element (in particular a battery module). A battery module provided for the drive of a vehicle is also referred to in part as a traction battery module.

A nominal voltage in the range from 300V to 1200V is provided in particular by means of a battery module which is provided for the drive of a vehicle in the sense of the present invention. In this regard, the battery module preferably comprises between 90 and 120 battery cells, which each provide a voltage in the range of 2V to 10V. The power of the battery module according to the invention is in the range of about 120kW to 480 kW. Preferred dimensions of the battery module in the sense of the present invention lie in the range of at least 50cm × 25cm, in particular between this value and 100cm × 50cm or 100cm × 100 cm. The weight lies in particular at least 20kg, preferably at least 50kg and may also be at least 80kg, 90kg or at least 100 kg.

The present invention relates to a hybrid vehicle or a purely electric vehicle, in particular a motorcycle or a motor vehicle, wherein the vehicle is electrically driven at least in certain operating phases or also only by means of a battery module.

Background

An electronic installation controller is known from DE 102006001890 a1, which is intended to be used in conjunction with a controllable device, a carrier plate and an electronic module mounted on the carrier plate. The installation controller is to be connected to the actuators and/or sensors of the installation via a conventional cable plug connection. From this document, the relationship with a battery module provided for the driving of a vehicle cannot be understood.

DE 102011107075 a1 discloses a battery module with battery cells integrated in cell modules, wherein the cell modules and control modules are arranged on a carrier plate which is constructed in a modular manner. The cell modules are surrounded by a housing and can be cooled by means of a cooling medium which is guided in a closed cooling circuit in a cooling channel. The cooling channels are integrated into the carrier plate, and plug connections are provided to the cooling channels forming the forward row (Vorlauf) and to the return row (Ruecklauf). The connection of the unit modules to each other and to the controller and the unit modules is not described in detail in this document.

A fastening device for a housing of a control device is known from DE 102010063155 a 1.

Disclosure of Invention

The invention is based on the object of providing a control unit for a battery module provided for driving a vehicle, the arrangement of such a control unit at a further element and a method for establishing a connection between such a control unit and a further element, which simplifies the handling and assembly.

The solution of this object is achieved according to the invention with the features of the independent claims. Further practical embodiments and advantages of the invention are specified in the dependent claims.

The control device according to the invention for a battery module provided for driving a vehicle has a housing, furthermore at least one coolant fluid guide (kuehltetlfidfuehrung), and at least one electrical interface. At least one coolant coupling device (Kopplungsmittel) is provided on at least one connection side of the control unit for establishing a plug-in fluid connection with other components. The other components are in particular battery modules or further functional components with correspondingly compatible coupling means. The further functional element may be, for example, a heat exchanger or a measuring device.

Furthermore, at least one interface connection means is provided on the at least one connection side of the control unit for establishing a plug-in electrical connection with other components, in particular battery modules. A battery module provided for connection to a controller has at least one cell module in which a plurality of battery cells are arranged. The cell module has in particular between 90 and 120 battery cells. The battery cells are arranged in particular in rows extending parallel to one another, wherein each row is preferably formed by a large number of battery cells arranged in the same direction. Plug-in electrical connections are, in particular, high-voltage (HV) connections, via which voltages in the range from 300V to 1200V can be transmitted. Alternatively or additionally thereto, the plug-in electrical connection is a low-voltage (NV) connection, via which the voltage of the individual battery cells in the range of 2V to 10V can be transmitted and/or the voltage of the individual battery cell combinations (batteriezellverbutton) can be transmitted. Preferably, the plug-in electrical connection has an HV connection and an NV connection. The plug-fluid connection and the plug-electrical connection have the same plug-connection direction S, in particular so that the HV connection and the NV connection can be simultaneously established by a plug process.

The controller is used in particular for controlling the voltage supply of the vehicle via the at least one battery module. In particular, the voltage supply can be switched on or off and the at least one battery module can be electrically separated from the drive. The charging process of the at least one battery module is preferably controlled by a controller. In addition, by detecting and, if necessary, modifying the state of charge and the voltage of the individual battery cells arranged in the at least one battery module, a balancing of the individual battery cells can be achieved via the controller. Additionally, a temperature measurement can be provided, which can be read by means of the controller. For this purpose, the controller has at least one electrical interface. Furthermore, the controller has a coolant fluid guide to cool the electronic components arranged in the housing of the controller.

The coolant coupling means and the at least one interface coupling means are provided for establishing a plug connection (which can preferably be easily fitted) with the other component, in particular in such a way that both the coolant connection and the electrical connection can be established by simply pushing the control unit together with the other component.

The coolant coupling means for producing the plug-fluid connection and the interface coupling means for producing the plug-electrical connection enable the controller to be connected to the further element in a simple manner (by bringing the controller and the further element close to one another in the plug-connection direction S and plugging the corresponding coupling means together). In particular, such a connection can be realized in an automated manner, without additional tools and without additional components to be additionally assembled, in a simple and cost-effective manner.

The plug-in fluid connection can be established in particular simply as described below if the end section of the coolant coupling means, which is the coolant fluid guide, projects at the connection side relative to the control device and the coolant coupling means has a smaller or larger cross-sectional extent than the corresponding coolant fluid guide of the other element. In this case, the coolant coupling means can be inserted together with the coolant fluid guide of the other element, in particular by inserting one element into the other element. At least one O-ring is provided in particular at the coolant coupling means for establishing a sealed arrangement. In order to provide a clip-type retention of the plug connection, it can be designed as a transition fitting (uebergangsparung) or as a press fitting. The coolant coupling means has in particular a preferably circumferential stop with a stop surface. Such a stop can advantageously be used for assembly in order to achieve a mechanical assembly (by inserting the control and the further element together up to the stop) during the insertion together, largely independently of the force level and/or the assembly speed.

The interface coupling means are in particular designed as a projecting contact, or as a projecting plurality of contacts, contact pins or pins, or alternatively as one or more contact holes, which engage in corresponding contact holes or contact pins when establishing the plug-in electrical connection. Furthermore, individual plugs can be provided which in particular protect the contact pins and/or which respectively provide the contact holes and the contact pins as a whole. If plugs are provided on both sides, the correspondingly complementarily configured plugs are preferably inserted into one another when the control unit is pushed together with the other elements and are therefore professionally fitted to one another.

As a whole, it can be seen that the control unit according to the invention makes it possible to establish at least two different connection types simultaneously by plugging, i.e. in particular to establish an electrical plug-electrical connection and to establish a plug-fluid connection for the coolant.

In a practical embodiment, the housing of the controller is fixedly connected to at least one individual profile element, at the end side of which coolant and/or interface coupling means are provided. The contour element is in particular designed as a hollow profile (hohlprofile), which can be used as a coolant flow guide and/or in which a fluid line and/or an electrical line can be arranged, that is to say can be arranged or designed. Preferably, cost-effective extruded profiles (strangpressprofile) can be used as profile elements, in particular made of aluminum. In such an extruded profile, a cavity can be formed or provided in a simple manner in order to guide a coolant fluid therein. Alternatively or additionally to this, a pipe or a plurality of pipes can be arranged in such an extruded profile. In particular, the at least one contour element is screwed to the housing of the control unit. It is preferably designed and arranged such that it serves as protection of the control against mechanical damage or other influences, in particular in the region of one or more sides, preferably in the region of two opposite sides, respectively.

The coolant is guided in the at least one profile element, in particular outside the housing, via a continuous fluid line. In order to cool the control electronics within the housing, the fluid lines branch off and conduct the coolant through the housing and/or along the housing into the region adjacent to the control electronics.

As already mentioned above, at the control unit according to the invention, in particular at least two contour elements are provided in each case outside the housing. Preferably, the at least two profile elements are arranged on opposite sides of the housing. The profile elements are in this case in particular fixedly connected to the housing, and at least one coolant coupling means and/or interface coupling means is provided at the end face at each of the profile elements. In particular, a supply line for the coolant can be arranged in one of the profile elements and a discharge line for the coolant can be arranged in the other profile element, so that the coolant flows from the one profile element with the supply line through the housing in the direction of the other profile element with the discharge line. By arranging at least two contour elements, which are not arranged in particular at the connection side of the control, the control is protected particularly well against damage.

A particularly simple handling and assembly of the control device according to the invention is achieved if, in addition, mechanical coupling means are provided at the control device, which effect a mechanical coupling of the control device to other elements. The other components are, as mentioned above, in particular, battery modules or other functional components with compatible coupling means.

The mechanical coupling element serves to establish a fixed connection of the control device to the further element, in particular in such a way that the control device and the further element can be moved in the connected state as a particularly rigid structural unit and installed in the motor vehicle.

The mechanical connection is preferably likewise designed as a plug connection having the same plug connection direction S as the plug electrical connection and the plug fluid connection. A total of three coupling means are provided, wherein not only a plug-fluid connection, but also a plug-electrical connection and a mechanical connection can be established by a connecting operation (that is to say by a single method step). As will be explained further below, in order to ensure a mechanical connection, a locking element may additionally be provided or applied.

In particular, a plug element, for example at least one spring-elastic latching element, is provided as a mechanical coupling means, which engages in a corresponding recess with a corresponding shoulder or undercut (hinderschneidung).

Alternatively or additionally, the mechanical coupling means may be provided with projections and/or recesses. The projections or recesses at the control device are configured correspondingly to the recesses and projections at the further element. Preferably, the projection and the corresponding recess are designed such that the projection is enclosed at least on two sides in the inserted state in the recess (i.e. in the assembled position). Preferably, the design is such that the projection of the control engages with the recess of the battery module, so that the battery module and the control are moved towards one another in the plug connection direction and are thus coupled to one another.

In order to additionally or exclusively ensure a mechanical connection between the control device and the further element, holes are optionally formed in the projections and/or in the region around the recesses, respectively, such that they allow the insertion of the locking element. In the assembled position, that is to say when the control device is connected to a further element, the projections and the corresponding holes formed in the region around the recess are arranged in alignment with one another, so that the locking element can be arranged so as to extend through both holes. The locking element is in particular designed as a pin or as a bolt. Preferably, the locking element is configured as a sleeve. The sleeve offers the advantage that, after insertion, a screw can additionally be inserted therein, which screw can be used, for example, for connecting the control unit to the vehicle.

The invention also relates to an arrangement of at least one controller and further elements as described above. In particular, battery modules or other functional elements are provided as further elements. At least one coolant coupling means for producing a plug-in fluid connection with the control unit and at least one interface coupling means for producing a plug-in electrical connection with the control unit are provided on at least one connection side of the further element. The plug-in electrical connection is in particular an HV connection or alternatively an HV connection and an NV connection. The plug-fluid connection and the plug-electrical connection have the same plug-connection direction S. The connection side of the control device is arranged in such an orientation relative to the connection side of the further element that a direct plug-fluid connection and a direct plug-electrical connection are established between the control device and the further element. Preferably, the connection sides of the control device and the further element are arranged in such an orientation that the connection sides are arranged directly adjacent to one another.

The arrangement according to the invention of the control unit and the further elements can thus be established in a simple manner by plugging together in the plug-in direction. Reference is made to the preceding description for further advantages of the arrangement according to the invention.

In a practical embodiment of the arrangement according to the invention, in addition to the plug-electrical and plug-fluid connections, a mechanical connection is established between the control unit and the further element via at least one mechanical coupling means. The mechanical connection is achieved in particular via a projection and a corresponding recess as explained above. Preferably, the projection and the region surrounding the recess have bores which are aligned with one another, wherein the bores are additionally penetrated by the locking element.

The invention also relates to a method for connecting a controller as explained above with a further element. For the definition of the further elements reference is made to the previous description. At least one coolant coupling means for producing a plug-in fluid connection with the control unit and at least one interface coupling means for producing a plug-in electrical connection with the control unit are provided on at least one connection side of the further element, wherein the plug-in fluid connection and the plug-in electrical connection have the same plug-in direction S. To establish the connection, the control unit and the further element are moved relative to one another in the plug-connection direction S in such a way that a plug-fluid connection and a plug-electrical connection are established. In order to establish all plug connections, in particular only one connection side of the control unit and the compatible connection side of the further element are moved toward one another and optionally also directly contact one another.

The method according to the invention can be carried out in particular automatically by gripping (holding) the control unit and the further elements by means of a robot and moving them relative to one another in the plug-connection direction S toward one another.

In particular, in the method according to the invention, a mechanical connection is additionally established between the control unit and the further element. For this purpose, the control device and the further elements have, in particular, compatible mechanical coupling means, such as projections and recesses. By arranging the locking element in a projecting manner in the bore formed in the region around the recess and in the bore formed in the projection, the mechanical connection can additionally be protected against unintentional release.

Drawings

Further advantages and practical embodiments of the invention are described in the following with reference to the figures. Wherein:

figure 1 shows an arrangement according to the invention of a battery module and a controller according to the invention before a plug connection is established,

figure 2 shows a controller according to the invention in an exploded view,

figure 3 shows a section marked iii of figure 1 in an enlarged perspective view,

figure 4 shows the controller according to the invention of figures 1 and 2 in a perspective view to one connection side,

figure 5 shows the battery module of figure 1 in a perspective view to the second connection side,

figure 6 shows the arrangement of the controller and the battery module according to figure 1 after the plug-in connection has been established in a sectional view through a first contour element,

figure 7 shows the arrangement of the controller and the battery module according to figure 1 after the plug-in connection has been established in a sectional view corresponding to line vii-vii in figure 6,

fig. 8 shows, in a first perspective view, the arrangement of the controller and the battery module according to fig. 1 before the plug-in connection is established and

fig. 9 shows the arrangement of the controller and the battery module according to fig. 1 before the plug-in connection is established in a second perspective view.

List of reference numerals

10 cell module

12 controller

14 first connection side

16 second connection side

18 casing

20 cavities

22 sealing plate

24 first profile element

26 end side

28 mechanical coupling device

30 second profile element

32 cavity

34 bolt

36 additional elements

38 coolant fluid guide

40 fluid line

42 fluid line

44 coupling part

46 Coolant distribution element

48 gusset plate (Anschlusspanel)

50 electrical interface

52 interface-coupling device

54 plug

56 holes

58 coolant coupling device

60 stop

62 stop

64O-ring

66 low-voltage contact

68 high-voltage contact

70 contact hole (NV)

72 contact Hole (HV)

74 projection

76 recess

78 holes

80 locking the element.

Detailed Description

Fig. 1 shows three structurally identical battery modules 10 and a controller 12, the battery modules 10 having been connected to one another by means of plug connections and the controller 12 being shown before the plug connections have been established. To establish the plug connection, the battery module 10 and the controller 12 are moved toward one another in the plug connection direction S. Each battery module 10 has a first connecting side 14 and an opposite second connecting side 16, wherein the respective connecting sides 14,16 abut during the connection of the battery modules 10. The control unit 12 likewise has a first connection side 14, which directly adjoins a corresponding second connection side 16 of the battery module 10. The battery module 10 is a further element 36 within the meaning of the invention.

The construction of the controller 12 will first be discussed in detail below in conjunction with fig. 2.

The controller 12 comprises a housing 18 in which, inter alia, control electronics (not shown) are arranged. The housing 18 is configured at least on the underside shown in fig. 2 as a hollow profile and has a plurality of cavities 20 (see also fig. 6 and 7). For fixing the position of the control electronics in the housing 18 and for sealing, sealing plates 22 are respectively provided on the right and left in the housing 18.

At the longitudinal sides of the housing 18, first profile elements 24 are respectively arranged, which extend over the entire height and length of the housing 18. The first profile element 24 is designed as a hollow profile and has mechanical coupling means 28 at its end face 26. This is discussed in detail in connection with fig. 3 to 6. On the side of the first profile element 24, a second profile element 30 is arranged, which has an L-shaped geometry. The second profile element 30 is likewise designed as a hollow profile and has a plurality of cavities 32. The first profile element 24 and the second profile element 30 are jointly fixed to the housing 18 by means of bolts 34 (see also fig. 3 and 6).

A coolant fluid guide 38 is formed in the respective second contour element 30, wherein in the present case a fluid line 40, 42 is respectively arranged in the cavity 32 of the second contour element 30. One fluid line 40 serves as a supply line for the coolant and the other fluid line 42 serves as a discharge line for the coolant. The fluid lines 40, 42 for the coolant each have a connection 44 for connecting a coolant distributor element 46, via which the coolant is guided into the cavity 20 of the housing 18 and thereby cools the control electronics from below.

For coupling and for operating the control electronics, a coupling plate 48 is arranged at the housing 18.

The controller 12 furthermore has an electrical interface 50 for establishing an electrically conductive connection to the battery module 10 (see fig. 4). For this purpose, an interface coupling device 52 and a plug 54 are currently provided for establishing a plug-in electrical connection (see fig. 4). A bore 56 is formed in the housing 18 on the connection side 14, via which the interface coupling means 52 is accessible.

The construction of the battery module 10 is similar to that of the controller 12. The same reference numerals are therefore used for identical or functionally identical elements as are used to explain the construction of the controller 12.

The establishment of the connection of the controller 12 with the battery module 10 is explained next with reference to fig. 3 to 9. The controller 12 and the battery module 10 have three connection types here: plug-fluid connections, plug-electrical connections and mechanical connections. All three connections are set up or released by a relative movement in the plug-connection direction S.

The establishment of the plug-fluid connection will first be explained in detail. To establish the plug-in fluid connection, the controller 12 has a coolant coupling device 58 (see fig. 3 and 9). The coolant coupling means 58 is a section of the fluid line 40, 42 for the coolant which projects in the plug-in direction S relative to the remaining control unit 12. The coolant coupling means 58 is arranged at the end side 26 of the second profile element 30 at the first connection side 14, both at the supply line 40 for the coolant and at the outlet line 42 for the coolant. The coolant coupling means 58 has a smaller diameter than the remaining fluid lines 40, 42 and can therefore be inserted into the corresponding fluid lines 40, 42 of the further element 36 (as here the battery module 10) at the second connection 16. As can be clearly seen in fig. 9, the coolant coupling means 58 furthermore has a circumferential stop 60 which, when the plug connection is being established, comes into contact with a stop 62 at the second connection side 16. Furthermore, two O-rings 64 are arranged at the coolant coupling means 60 in order to establish a sealed connection.

To establish the plug-in electrical connection, the controller 12 has an electrical interface 50 with an interface coupling device 52 (see fig. 4 and 7). At the connection side 14, the control unit 12 currently has contacts 66, 68 or pins (contacts are only shown here at the first connection side in fig. 4) which project as an interface coupling means 52 and are embodied in this connection as male plugs ("male"). The contacts 66, 68 are disposed within and retracted relative to the housing 18. Fig. 7 shows that the interface coupling device 52 has a plurality of contacts 66 for producing a low-voltage (NV) connection and a contact 68 for producing a high-voltage (HV) connection.

The plug-in electrical connection is realized by inserting a separate plug 54, which has contact holes 70, 72 corresponding to the contact 66 for the NV connection and the contact 68 for the HV connection, respectively, on the side oriented with respect to the first connection side 14 and on the side oriented with respect to the second connection side 16. The plug 54 is thus embodied as a double female plug ("double female"). The plug-in electrical connection is realized in the example shown in fig. 3 and 8 in such a way that the plug 54 is plugged in the plug-in connection direction S onto the contacts 66, 68 of the second connection side 16 of the battery module 10 and in a second step is plugged with the contacts 66, 68 onto the first connection side 14 of the controller 12.

In addition to the coolant coupling means 58 and the interface coupling means 50 described above, a mechanical coupling means 28 is provided. As can be clearly seen in fig. 6 and 8, the first connection side 14 of the control device 12 has a projection 74, which is formed in correspondence with a recess 76 formed at the second connection side 16 of the battery module 10. The projection 74 is received in the recess 76 and is surrounded by two sides (here above and below) (see fig. 6 and 7).

In the projection 74 and in the region around the recess 76, a hole 78 is formed in each case (see fig. 4 and 5). These holes 78 are arranged in alignment with one another and are penetrated by the locking element 80 when the controller 12 is connected to the battery module 10 or the further element 36. The locking element 80 is now a sleeve (see fig. 6 and 7). The sleeve has an external thread and can furthermore be penetrated by a screw for fastening the control unit 12 and the battery module 10 to the vehicle.

The features of the invention disclosed in the present description, in the drawings and in the claims can be essential for the realization of the invention both individually and in any desired combination in their different embodiments. The invention may vary within the scope of the claims and taking into account the knowledge of the expert in the field.