Connection system

Abstract

Connection system (2) comprising an electronic module (4) and an electronic connector (6) that can be coupled to it via a signal connection, - wherein the electronic module (4) has a pot-shaped battery compartment (10) for receiving a battery cell, in particular a button cell, which can be closed by means of a lid, - wherein the cover can be attached to the battery compartment (10) by means of a fastening contour (14) in a form-fitting and / or force-fitting manner, - wherein the electronic module (4) comprises an electronic control unit (20) with a contact element (24), - wherein the contact element (24) is accessible in the battery compartment (10), - wherein the connector (6) has a connector housing (26) with a mating contact element (28) arranged at the end face, - wherein the plug housing (26) can be inserted axially into the battery compartment (10) such that the mating contact element (28) is electrically contacted with the contact element (24).

Description

[0001] The invention relates to a connection system comprising an electronic module and an electronic connector that can be coupled thereto via a signal. The invention further relates to an electronic module and a connector for such a connection system.

[0002] Electronic modules are implemented, for example, as electronic control units (ECUs) and are frequently used for controlling, monitoring, or regulating electric or internal combustion engine machines. Such electronic modules are used, for example, for engine control, for reading machine parameters (e.g., pressure, temperature, state of charge, etc.), or as interfaces for implementing a connected infrastructure, such as the Internet of Things (IoT).

[0003] In mobile applications or applications with limited installation space, electronic modules often feature compact or low-profile module housings. The electronic module is powered, for example, by a battery cell integrated into the module housing, with button cells being particularly common to further reduce the required installation space.

[0004] For such battery-powered electronic modules, an electrical interface for coupling with an external accessory is often desired to ensure reliable communication with the module during maintenance, service, or diagnostic work. These interfaces are preferably designed for a physical or wired connection to enable a secure communication path.

[0005] To implement such an interface, a plug-based connection system is often used, in which a connector coupled to a signal cable can be plugged into a corresponding socket on the module housing. This requires an additional socket on the module housing, which adversely increases the space required for the electronic module.

[0006] Furthermore, such a connector must be protected from moisture and external influences, especially in applications in harsh environments, which is why comparatively high demands are placed on the tightness of the connector in such connection systems, for example according to automotive or military standards (e.g. MIL-STD).

[0007] Such connection systems are therefore a cost driver in the manufacture of electronic modules, especially in applications where the connector is not permanently connected. Consequently, expensive, complex connectors and / or sockets are often used, which, for example, feature a protective cap for the unconnected state.

[0008] Electronic modules, especially in applications in harsh environments, are therefore often implemented without a physical connection system, or only have a needle adapter for manual contacting during debugging.

[0009] The invention is based on the objective of providing a particularly suitable connection system. In particular, a compact connection system is to be provided that enables a tight and reliable signal connection even in harsh environments. The invention is further based on the objective of providing a particularly suitable electronic module and a particularly suitable connector.

[0010] With regard to the connection system, the problem is solved according to the invention by the features of claim 1, with regard to the electronic module by the features of claim 11, and with regard to the connector by the features of claim 12. The advantages and embodiments mentioned with regard to the connection system are also transferable mutatis mutandis to the electronic module and / or the connector, and vice versa.

[0011] The connection system according to the invention is designed, suitable, and implemented for establishing a physical or wired signal connection. The connection system comprises an electronic module and an electronic connector that can be coupled to it for signal transmission. The connection system is thus designed as a plug-in or connector system, enabling a simple and quick connection between the electronic module and the connector.

[0012] The electronic module is battery-powered and features a pot-shaped battery compartment for a battery cell, which is integrally molded, i.e., monolithically, onto a module housing. The module housing is, for example, an injection-molded part, with the battery compartment preferably being formed as a recess in a module housing wall, particularly an outer wall.

[0013] In this context, and in the following, a "battery compartment" refers specifically to a housing element of the module housing designed to hold and secure a battery cell. The battery compartment has electrical contacts to connect to the inserted battery cell and thus supply the electronic module with electrical energy.

[0014] The battery cell is specifically a button cell, meaning it's a small, disc-shaped battery with a low profile. Accordingly, the battery compartment is specifically designed as a button cell battery compartment.

[0015] The following information pertains to spatial directions, particularly with regard to the battery compartment. "Axial" or "axial direction" refers specifically to a direction parallel (coaxial) to a central axis, i.e., perpendicular to the end faces of the battery compartment. Similarly, "radial" or "radial direction" refers specifically to a direction perpendicular (transverse) to the central axis along a radius of the battery compartment. "Tangential" or "tangential direction" refers specifically to a direction along the circumference of the battery compartment (circumferential direction, azimuthal direction), i.e., a direction perpendicular to both the axial and radial directions.

[0016] The (circular) cylindrical battery compartment, for example, has a battery compartment base on one end face facing the inside of the module housing, and a (battery compartment) cover can be arranged on an opposite end face facing the environment to cover the battery compartment.

[0017] The battery compartment features a mounting contour for the form-fitting and / or force-fit attachment of the cover. When attached, the cover seals the battery compartment. In other words, when the cover is attached, a battery compartment is formed for the battery cell. In the attached state, the cover seals the battery compartment, particularly in a pressure-, water-, and / or moisture-tight manner, thus creating a substantially enclosed space for the battery cell. The attachment of the cover by means of the mounting contours can be designed such that, when attached, the cover presses axially onto the battery cell to, for example, ensure electrical contact between the battery cell and the contacts of the battery compartment.

[0018] The conjunction “and / or” is to be understood here and in the following as meaning that the features linked by means of this conjunction can be both common and alternative to each other.

[0019] The term "positive locking" or "positive locking connection" between at least two interconnected parts is understood here and in the following to mean, in particular, that the cohesion of the interconnected parts is achieved, at least in one direction, by a direct interlocking of the contours of the parts themselves or by an indirect interlocking via an additional connecting element. The blocking of mutual movement in this direction is thus due to the form.

[0020] In the following, a "friction-fit" or "force-fit connection" between at least two connected parts is understood to mean, in particular, that the connected parts are prevented from sliding against each other due to a frictional force acting between them. If a connecting force generating this frictional force is absent (this means the force that presses the parts against each other, for example, a screw force or the force of gravity itself), the force-fit connection cannot be maintained and can therefore be broken.

[0021] The electronic module also includes an electronic control unit. The electronic control unit comprises an electrical circuit with at least one contact element for electrical or signal communication. This contact element is positioned within the module housing in such a way that it is accessible from the battery compartment. This means that the contact element can be contacted from inside the battery compartment. For example, the contact element is located inside the battery compartment. In other words, the contact element is, for instance, at least partially inserted into the battery compartment.

[0022] The connector has a plug housing for holding at least one mating contact element. The mating contact element is designed to be complementary to the contact element and is configured to establish an electrical connection with the contact element. The connector is, for example, arranged on a signal cable to establish a wired electrical or signal connection between the electronic control unit and another device, wherein this device itself is not part of the connection system according to the invention.

[0023] For connection, the connector can be inserted axially into the battery compartment. To do this, the battery compartment is opened by removing the cover, preferably also removing any battery cell that may be present in the compartment. When connected, the mating contact element of the connector contacts the contact element of the electronic control unit. This results in a particularly suitable connection system.

[0024] According to the invention, an advantageous functional integration is thus achieved in which the socket for the connector is integrated into the battery compartment. This eliminates the need for an additional or separate socket on the module housing, enabling a particularly compact design of the electronic module and its housing. In particular, the connection system according to the invention does not require any additional components for a socket, as the battery compartment already fulfills the necessary requirements.

[0025] The connection system according to the invention can, for example, be implemented as a developer interface for the electronic control unit. In a preferred application of the connection system according to the invention, the electronic module is implemented as a sensor, for example as an IoT sensor (IoT: Internet of Things). For example, when replacing the battery or button cell, it is possible to read out collected data from the sensor or electronic module via the connector and / or to install a software update on the electronic control unit.

[0026] Since the contact elements are protected within the module housing or battery compartment, their design is particularly simple. The contact element of the electronic control unit is preferably designed to be flat, ensuring that its accessibility from inside the battery compartment does not lead to a collision with a battery cell inserted therein.

[0027] In particular, when a battery cell is inserted into the battery compartment and connected, there is no contact between the contact element and the battery cell. For example, the contact element is designed as a contact pad, i.e., as an electrically conductive surface, which serves as a connection point for the mating contact element to establish an electrical connection.

[0028] The mating contact element of the connector preferably projects axially or vertically from the end face of the connector housing. This ensures that the mating contact element engages as deeply as possible into the battery compartment when the connector is plugged in. This allows for a particularly deep placement of the contact element, spaced apart from the contacts for the battery cell. The mating contact element is, for example, designed as a contact pin, i.e., as an approximately pin-shaped, electrically conductive component, which is at least partially embedded in or overmolded with the connector housing. The mating contact element preferably penetrates the end face wall of the connector housing and is connected inside the housing, for example, to electrical conductors of a signal cable.

[0029] In one conceivable embodiment, the electronic control unit has a number of contact elements, i.e., several, in particular more than two, contact elements, wherein the connector preferably has a number of mating contact elements corresponding to the number of contact elements. The control unit can, for example, have more contact elements than the connector has mating contact elements, so that in the connected state not all contact elements of the control unit are also in contact with a mating contact element of the connector.

[0030] For example, the electronic control unit has at least three contact elements. Two of the contact elements are provided for supplying power (positive, negative) to the electronic control unit, in order to ensure that the electronic control unit is powered when a battery cell is removed, while the third contact element is provided for data, signal or communication transmission.

[0031] In a preferred embodiment, the battery compartment has a support for the battery cell. This support is formed, for example, by the battery compartment base and serves as an axial support surface for the battery cell within the battery compartment. The contact element is arranged axially recessed relative to this support. This means that one plane of the contact element is offset parallel to the battery compartment base or the support, so that the contact element is positioned below the receiving volume for the battery cell, i.e., towards the interior of the module housing. Thus, contact and / or an electrical connection between a battery cell arranged in the battery compartment and the contact element is easily prevented by design.

[0032] In an advantageous embodiment, the contact element is arranged on a circuit carrier, in particular on a printed circuit board (PCB), of the control unit. The contact element is specifically designed as a PCB pad. The circuit carrier is guided axially below the battery compartment. In other words, the circuit carrier is arranged offset from the battery compartment towards the interior of the module housing. The circuit carrier is positioned, in particular, parallel to the battery compartment base or the support surface within the module housing. The battery compartment, in particular the battery compartment base, has a central opening for the contact element. Thus, in this embodiment, the contact element is positioned outside the battery compartment, i.e., within the module housing.

[0033] The opening, for example a hole, is arranged axially aligned with the contact element, so that when the connector is inserted, at least the mating contact passes through the opening section by section and contacts the contact element located below the battery compartment.

[0034] The arrangement of the contact element on the circuit carrier allows for particularly easy installation of the contact element within the module housing, ensuring that the contact element is always reliably positioned in the area of ​​the feed-through opening. Furthermore, its placement outside the battery compartment guarantees that no contact is made with the contact element if a battery cell is located within the battery compartment.

[0035] In one possible design, the connector housing is held radially in the battery compartment by a positive locking mechanism when inserted. For example, the battery compartment base has an axial recess or indentation into which the connector housing engages, at least partially, when plugged in. This means that radial forces acting on the connector are directly supported by the battery compartment, so that they do not affect the electrical contact between the contact element and the mating contact element.

[0036] The radial positive locking mechanism also provides axial guidance of the connector housing during the insertion process, ensuring consistently reliable and safe contact between the mating contact element and the contact element.

[0037] An additional aspect of the invention provides that the connector has a clamping sleeve guided on the connector housing. The clamping sleeve is rotatably mounted on the connector housing. The connector can be attached to the battery compartment by means of the clamping sleeve, thus securing the connector against axial slippage out of the battery compartment when inserted. This ensures stable and reliable electrical contact between the connector and the electronic control unit.

[0038] The clamping sleeve is designed, for example, as a separate, snap-on sleeve that is slipped onto the connector housing and attached to the battery compartment to securely and preferably (pressure-, moisture-, and water-)tightly attach the connector to the battery compartment or the module housing. Alternatively, the clamping sleeve can also be designed as a rotatable coupling sleeve of the connector housing, securely held in place by the connector housing, and thus form a single assembly with it.

[0039] In a preferred embodiment, the clamping sleeve has a mating contour by means of which the clamping sleeve can be screwed into the mounting contour of the battery compartment in a form-fit and / or force-fit manner. In other words, the clamping sleeve is attached to the mounting contour provided for the cover. This embodiment takes advantage of the fact that the cover is removed from the battery compartment during the plug connection, so that the mounting contours provided for this purpose can be used to hold the connector. Thus, no additional retaining contours of the battery compartment are required for attaching the clamping sleeve, enabling a particularly simple design for the battery compartment.

[0040] The connector is locked in place using the same mechanism as the cover, so that the plug connection achieved by the connection system can also be used in the electronic module.

[0041] The mounting contour is integrated into an inner wall or surface of the battery compartment, while the counter contour is located on an outer wall or surface of the clamping sleeve. The rotary mounting allows for particularly simple attachment of the clamping sleeve to the battery compartment.

[0042] In a practical embodiment, the mounting contour and the mating contour are designed for a threaded or bayonet connection. This allows for a particularly simple and stable rotary fastening of the clamping sleeve. Specifically, the clamping sleeve and the battery compartment are pressed axially against each other by a threaded or bayonet connection, whereby this axial pressing or clamping force can be used, for example, as a sealing force (sealing pressure) to seal the connector. The axial clamping force can also be used as contact pressure for the electrical contact between the mating contact elements and the contact elements to ensure a reliable electrical connection.

[0043] A bayonet connection (bayonet lock) allows for a quick and easy mechanical plug-and-twist connection between the connector and the battery compartment. A threaded connection (screw connection) provides a particularly stable and reliable connection between the components.

[0044] For example, the mounting contour is designed as an internal thread of the battery compartment, with the clamping sleeve being provided with a corresponding external thread.

[0045] In an advantageous embodiment, the connector housing has a radially widened mounting flange (ring collar). The mounting flange acts, for example, as an axial stop when the connector housing is inserted into the battery compartment, thus protecting the contact element from damage by the mating contact element.

[0046] In one possible design, when attached to the battery compartment, the clamping sleeve fixes the mounting flange, and thus the connector or the connector housing, axially in the battery compartment in a form-fit and / or force-fit manner.

[0047] The mounting flange, for example, features a sealing element (sealing ring, sealing lip) that tangentially surrounds the connector housing. When plugged in, this element creates a wet / dry compartment separation between a dry compartment located inside the module housing or battery compartment and a wet compartment located outside the module housing. It is conceivable, for instance, that the threaded or bayonet-type clamping of the terminal sleeve exerts axial sealing pressure on the mounting flange, thus ensuring a reliable and operationally safe seal of the connector. This enables a particularly tight connector connection using the connection system. Alternatively, the mounting flange itself can also be designed as a sealing element.

[0048] In a practical design, the plug connection between the battery compartment and the connector is equipped with a positioning and / or contact aid to ensure a desired angular position of the connector relative to the battery compartment when plugged in, and to prevent the connector from rotating relative to this position when clamped. The battery compartment and / or the connector thus have anti-rotation features. For this purpose, the mounting flange, for example, has a corresponding coding, particularly in the form of a radial recess, which optionally creates a tangential positive fit to the battery compartment.

[0049] The electronic module according to the invention is designed, suitable, and configured for a connection system as described above. The electronic module comprises a pot-shaped battery compartment for receiving a battery cell and an electronic control unit with at least one contact element. The battery compartment can be reversibly closed by means of a cover, the cover being attachable to the battery compartment by means of a fastening contour in a form-fit and / or force-fit manner. The contact element is accessible within the battery compartment. This results in a particularly suitable electronic module.

[0050] The connector according to the invention is designed, suitable, and configured for a connection system as described above. The connector has a plug housing with at least one mating contact element arranged at the end face for electrically contacting a contact element.

[0051] An embodiment of the invention is explained in more detail below with reference to a drawing. The drawing shows, in schematic and simplified representations: Fig. 1 a connection system comprising an electronic module and a connector plugged into it in a first embodiment, Fig. 2 the connection system in a second embodiment, Fig. 3 a connector housing in a third embodiment, and Fig. 4a, Fig. 4b Means to prevent the plug connection between the module and the connector from twisting.

[0052] Corresponding parts and sizes are always marked with the same reference symbols in all figures.

[0053] The Fig. Figure 1 shows a simplified and schematic representation of a connection system 2 with an electronic module 4 and a connector 6 plugged into it.

[0054] The electronic module 4 is battery-operated and has a module housing 8 and a battery compartment 10 molded onto it for receiving a battery cell, in particular a button cell.

[0055] The pot-shaped battery compartment 10 is specifically designed as a button cell battery compartment and has a correspondingly shallow depth. The battery compartment 10 has a support 12 as a base, on which the battery cell (not shown in detail) rests when inserted.

[0056] The following information concerns the spatial directions for the connection system 2, particularly as a function of the position of the battery compartment 10. Here and in the following, axial or an axial direction A is understood to mean, in particular, a direction parallel (coaxial) to a central axis, i.e., perpendicular to the end faces of the battery compartment 10. Similarly, radial or a radial direction R is understood here and in the following to mean, in particular, a direction oriented perpendicular (transverse) to the central axis along a radius of the battery compartment 10.

[0057] The axial distance between the support 12 and the cover or the battery compartment opening that can be closed thereby corresponds to a height of the battery compartment 10, which is dimensioned with respect to the height of a battery cell or button cell.

[0058] The battery compartment 10 is integrally molded, i.e., monolithically, onto the module housing 8. The battery compartment 10 is formed as an axial recess in a side wall (outer wall) of the module housing 8.

[0059] The inner wall of the battery compartment 10 is provided with a fastening contour 14 at an upper opening edge facing the environment, by means of which a (battery compartment) cover (not shown) can be attached in a form-fit and / or force-fit manner. When attached, the cover covers the housing-side opening of the battery compartment 10 and seals it, in particular, in a pressure- and fluid-tight manner, and especially in a watertight and / or dustproof manner. In the illustrated embodiment, the fastening contour 14 is designed as an internal thread.

[0060] The battery compartment 10 further comprises an annular wall 16, which surrounds the support 12 on its inner side. The annular wall 16 forms an axially stepped offset from the support 12. The support 12 is thus arranged axially offset from the annular wall 16. In other words, the support 12 is essentially a blind-hole-like recess in the annular opening of the annular wall 16. The diameter of the support 12 corresponds essentially to the diameter of a battery or button cell, so that the support 12 and the annular wall 16 provide a radially positive-locking recess for a button cell.

[0061] An axial through-hole 18 is provided in the support 12, which opens the battery compartment 10 to the interior of the module housing 8. The hole-like through-hole 18 is centrally located in the support 12 and is therefore positioned in the middle of the battery compartment 10.

[0062] An electronic control unit 20 of the electronic module is arranged within the module housing 8. The control unit 20 has a circuit carrier 22 on which the electronic components of the control unit 20 are arranged. In the illustrated embodiment, the circuit carrier 22 is designed as a printed circuit board.

[0063] In the illustrated embodiment, three contact elements 24 for contacting the control unit 16 are arranged on an upper surface of the circuit carrier 22 facing the battery compartment 10. The contact elements 24, which are only identified by reference numerals for illustrative purposes, are designed in this embodiment as flat contact pads of the circuit carrier 22. Two contact elements 24 are designed as connections for a power supply, for example as low-voltage connections (LV+, LV-), while the third contact element 24 is designed as a signal connection.

[0064] In the assembled state, the circuit carrier 22 is arranged in the module housing 8 such that the contact elements 24 are arranged axially below the feed-through opening 18, so that the contact elements 24 are accessible from the battery compartment 10. The contact elements 24 are thus axially recessed within the module housing 8 relative to the support 12, so that when the electronic module 4 is powered by a button cell inserted into and connected to the battery compartment 10, there is no contact between them and the button cell.

[0065] In the execution of the Fig. 2 Instead of the common feedthrough opening 18, several individual feedthrough openings are provided in the base of the pot 12, each of which makes one of the contact elements 24 accessible from the battery compartment 10.

[0066] The connector 6 has a cylindrical connector housing 26 with three mating contact elements 28. The mating contact elements 28, which are only identified by reference numerals for illustrative purposes, are arranged on the end face of the connector housing 26 and project axially upwards from it. The mating contact elements 28 are designed as contact pins, which are at least partially embedded in the end face of the connector housing 26. The mating contact elements 28 are, for example, overmolded as inserts with the connector housing 26, which is manufactured as an injection-molded part. The mating contact elements 28 completely penetrate the end face, so that they extend at least partially into the connector housing 26. The mating contact elements 28 are, for example, contacted by electrical conductors of a cable.Two opposing contact elements 28 are coupled as a connection to a power supply, for example a low voltage supply (NV+, NV-), wherein the third opposing contact element 28 is connected to a signal line.

[0067] In an embodiment not shown, the circuit carrier 22 has more contact elements 24 than the connector 6 has mating contact elements 28. In other words, it is possible that not every contact element 24 of the circuit carrier 22 is contacted with a mating contact element 28 of the connector 6.

[0068] The diameter of the plug housing 26 corresponds essentially to the diameter of a button cell, so that the plug housing 26 can be inserted radially into the receptacle formed by the ring wall 16 and the support 12 in a form-fitting manner.

[0069] The axial projection of the mating contact elements 28 on the connector housing end face is dimensioned such that the mating contact elements 28, when the connector 6 is plugged in, extend through the feedthrough opening 18 and axially contact each of the contact elements 24.

[0070] To lock or secure the connector housing 26 to the battery compartment 10, an annular clamping sleeve 30 is placed on the connector housing 26. The clamping sleeve 30 is guided axially on the connector housing 26 and is rotatably mounted around the connector housing 26. The clamping sleeve 30 is provided on its outer surface with a counter contour 32, which is designed to be complementary to the mounting contour 14. In this embodiment, the counter contour 32 is, in particular, an external thread which can be screwed into the internal thread formed by the mounting contour 14.

[0071] The connector housing 24 has a radially widened mounting flange 34. The outer diameter of the mounting flange 34 is larger than the inner diameter of the clamping sleeve 30, so that, in the unconnected state of the connector housing 26, the mounting flange 34 provides an axial stop to prevent the clamping sleeve 30 from being lost. The mounting flange 34 is, for example, integrally formed with the connector housing 26, i.e., monolithic.

[0072] The support flange 34 also serves as an axial stop when inserting the connector housing 26 into the battery compartment 10, which is axially supported on the ring wall 16.

[0073] The mounting flange 34 is designed, for example, as a circumferential sealing element (sealing ring, sealing lip) of the connector housing 26, which, in the plugged-in state, seals the receptacle formed by the annular wall 16 and the support 12 – and thus the housing opening of the module housing 8 formed by the feedthrough opening 18. The mounting flange 34 is therefore made of an elastic material and is preferably axially compressible.

[0074] The Fig. Figure 3 shows an embodiment of the connector housing 26 in which the mounting flange 34 is made of a mechanically stable plastic and optionally includes a sealing element 36 made of an elastic material, for example in the form of a sealing ring. The mounting flange 34 is, in particular, integrally formed with the connector housing 26.

[0075] The electronic module 8 is designed, for example, as a battery-operated sensor, such as an IoT sensor. In sensor mode, a button cell is inserted into the battery compartment 10 and connected, with the cover being attached to the mounting contour 14, thus securely closing and sealing the battery compartment 10.

[0076] The connection system 2 is used to read the collected sensor data and / or to install a software update. For this purpose, the cover of battery compartment 10 is removed, and the button cell is taken out of battery compartment 10.

[0077] The connector 6 is then plugged into the battery compartment 10. For this purpose, the connector housing 26 is inserted axially into the battery compartment 10, so that the free end of the connector housing 26 engages in the receptacle of the ring wall 16 and the support 12, and the mating contact elements 28 engage in the feedthrough opening 18. The support flange 34 abuts axially against the ring wall 16.

[0078] The schematic representation of the figure shows such a plug-connected state of the connection system 2, in which the connector 6 is plugged into the battery compartment 10, but the contact elements 24 and mating contact elements 28 are not (yet) electrically contacted.

[0079] Finally, the clamping sleeve 30 is screwed into the mounting contour 14. In the screwed-in state, the clamping sleeve 30 provides axial locking against the connector 6 being pulled out. In particular, the clamping sleeve 30 forms an axial stop for the support flange 34. The support flange 34 is thus axially positively engaged between the annular wall 16 and the clamping sleeve 30.

[0080] For a stable and reliable connection, the clamping sleeve 30 is screwed into the mounting contour 14 such that it presses axially onto the support flange 34. The connector housing 26 is thus held radially in a form-fit manner by the receptacle of the ring wall 16 and the support 12. At the same time, the support flange 34 is axially clamped between the clamping sleeve 30 and the ring wall 16, so that the connector housing 26 – and thus the connector 6 – is securely and reliably fixed to the battery compartment 10. At least when the connector 6 is mounted, the contact elements 24 are electrically conductive with the mating contact elements 24.

[0081] Advantageously, the plug connection between the battery compartment 10 and the connector 6 is equipped with a positioning and / or contacting aid (not shown) to ensure a desired angular position of the connector 6 relative to the battery compartment 10 when plugged in, and to prevent the connector 6 from rotating relative to this position during clamping. The battery compartment 10 and / or the connector 6 thus also have anti-rotation means 38. For this purpose, the mounting flange 34, for example, has a corresponding coding, in particular in the form of a radial recess, which optionally creates a tangential positive fit with the battery compartment 10.

[0082] The Fig. 4a and Fig.Figure 4b shows a top view of an embodiment of the means 38. In this embodiment, the battery compartment 10 has a radial groove 40 as a recess, wherein the connector housing 26 is accordingly designed with a corresponding radial extension 42, which engages tangentially in the groove 40 in a form-fitting manner during the plug connection, and thus provides relative anti-rotation protection between the battery compartment 10 and the connector housing 26.

[0083] When connected, the electronic module 4 or the control unit 20 is supplied with electrical energy via connector 6. Furthermore, signal transmission takes place, whereby, for example, sensor data is transmitted from the control unit 20 via the cable of connector 6.

[0084] The claimed invention is not limited to the embodiment described above. Rather, other variants of the invention can also be derived by a person skilled in the art within the scope of the disclosed claims without departing from the subject matter of the claimed invention. In particular, all individual features described in the embodiment can also be combined completely or partially within the scope of the disclosed claims without departing from the subject matter of the claimed invention. Reference symbol list 2 Connection system 4 Electronic Module 6 connectors 8 module housings 10 Battery compartment 12th edition 14 Mounting contour 16 Ring wall 18 Feedthrough opening 20 Electronic control unit 22 circuit carriers 24 contact elements 26 connector housings 28 Counter contact element 30 clamping sleeve 32 Counter contour 34 Mounting flange 36 Sealing element 38 means 40 Nut 42 Extension A Axial direction R Radial direction

Claims

[1] Connection system (2) comprising an electronic module (4) and an electronic connector (6) that can be coupled to it via a signal connection, - wherein the electronic module (4) has a pot-shaped battery compartment (10) for receiving a battery cell, in particular a button cell, which can be closed by means of a lid, - wherein the cover can be attached to the battery compartment (10) by means of a fastening contour (14) in a form-fitting and / or force-fitting manner, - wherein the electronic module (4) comprises an electronic control unit (20) with a contact element (24), - wherein the contact element (24) is accessible in the battery compartment (10), - wherein the connector (6) has a connector housing (26) with a mating contact element (28) arranged at the end face, - wherein the plug housing (26) can be inserted axially into the battery compartment (10) such that the mating contact element (28) is electrically contacted with the contact element (24). [2] Connection system (2) according to claim 1, characterized by , that the battery compartment (10) has a support (12) for the battery cell, wherein the contact element (24) is arranged axially recessed to the support (12). [3] Connection system (2) according to claim 1 or 2, characterized by , - that the contact element (24) is arranged on a circuit carrier (22) of the control unit (20), which is guided axially below the battery compartment (10), and - that the battery compartment (10) has a central through-hole (18) to the contact element (24). [4] Connection system (2) according to any one of claims 1 to 3, characterized by , that the connector housing (26) is held radially in the battery compartment (10) when plugged in. [5] Connection system (2) according to any one of claims 1 to 4, characterized by , that the connector (6) can be attached to the battery compartment (10) by means of a clamping sleeve (30) guided on the connector housing (26). [6] Connection system (2) according to claim 5, characterized by , that the clamping sleeve (30) has a counter contour (32) which can be screwed into the mounting contour (14) of the battery compartment (10) in a form-fit and / or force-fit manner. [7] Connection system (2) according to claim 6, characterized by , that the fastening contour (14) and the counter contour (32) are designed for a threaded or bayonet connection. [8] Connection system (2) according to any one of claims 1 to 7, characterized by , that the connector housing (26) has a radially widened support flange (34) by means of which the connector housing (26) is axially supported in the battery compartment (10) when plugged in. [9] Connection system (2) according to claim 8, characterized by, that when the clamping sleeve (30) is attached to the battery compartment (10), the clamping sleeve (30) axially secures the support flange (34) in the battery compartment (10) in a form-fit and / or force-fit manner. [10] Connection system (2) according to any one of claims 1 to 9, characterized by , that the battery compartment (10) and / or the connector (6) shall have means (38) for anti-rotation protection. [11] Electronic module (4) for a connection system (2) according to one of claims 1 to 10, comprising a pot-shaped battery compartment (10) for receiving a battery cell and an electronic control unit (20) with at least one contact element (24), - wherein the battery compartment (10) can be closed by means of a cover, - wherein the cover can be attached to the battery compartment (10) by means of a fastening contour (14) in a form-fitting and / or force-fitting manner, and - wherein the contact element (24) is accessible in the battery compartment (10). [12] Connector (6) for a connection system (2) according to one of claims 1 to 10, comprising a connector housing (26) with a mating contact element (28) arranged on the end face for electrical contact with a contact element (24) of an electronic module (4).

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