Electrical filter module, charging device and battery system

Abstract

The invention relates to an electrical filter module (1) designed for common use with a charging interface (6) for AC operation of a vehicle battery, the filter module (1) being designed for capacitively coupling a protective conductor (18) leading to the vehicle battery to a neutral conductor (20) leading to the vehicle battery, the protective conductor (18) is capacitively coupled to at least one outer conductor (22) leading to the vehicle battery, and the filter module (1) is designed to be attachable to the charging interface (6) from outside the charging interface (6). Due to the installability, the filter module (1) can be easily installed. The invention further relates to an assembly (4) having an electrical filter module (1) and at least two charging interfaces (6a, 6b). The invention further relates to a charging device (2) for a vehicle battery and to a battery system of an electric vehicle.

Description

Technical Field

[0001] The present invention relates to an electrical filter module for common use with a charging interface for AC operation of a vehicle battery. Furthermore, the present invention also relates to an assembly having an electrical filter module and at least two charging interfaces. Furthermore, the present invention also relates to a charging device for a vehicle battery and a battery system of an electric vehicle. Background Art

[0002] An electric vehicle is herein understood to be a vehicle operating purely electrically or a vehicle having an electric drive as a partial drive, such as a hybrid vehicle, in particular a plug-in hybrid vehicle, regardless of its size, i.e., including passenger cars, trucks and commercial vehicles, as well as agricultural and forestry vehicles.

[0003] Such electric vehicles are usually connected to an AC or DC current source via a charging interface in order to charge their vehicle batteries. In particular, when using the public power grid as the current source, there is a risk that grid faults may cause damage or negative impacts to the electric vehicle and its components.

[0004] In particular, the following electric vehicles are particularly vulnerable to grid faults, i.e., their initial usage characteristics do not stipulate the use of the public power grid, but later require the use of the public power grid. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to provide a possibility to avoid or at least reduce the above-mentioned drawbacks in a simple manner.

[0006] The technical problem is solved by the aforementioned electrical filter module, wherein the filter module is designed to capacitively couple the protective conductor guided to the vehicle battery with the neutral conductor guided to the vehicle battery, and further capacitively couple the protective conductor with at least one outer conductor guided to the vehicle battery, wherein the filter module is designed to be externally plugged onto the charging interface.

[0007] The charging interface can be a vehicle-side or grid-side device of the charging infrastructure, such as a charging socket or a charging plug. The protective conductor serves as a ground conductor here, the neutral conductor as a neutral conductor, and at least one outer conductor as a phase conductor. Each conductor extends along a common conductor extension direction.

[0008] One advantage achieved by the present invention is that with the aid of the filter module, it is possible to better protect the vehicle battery and all associated electrical and electronic components from grid faults, especially so-called surge or impulse events. Through the capacitive coupling of the corresponding conductors, voltage peaks in the kV range that occur briefly (e.g., 40 ns) during such events can already be completely or at least sufficiently guided from the neutral conductor or the outer conductor to the protective conductor at the system input.

[0009] Due to the installability of the filter module according to the present invention, the filter module can be simply installed, so that not only can the initial manufacture of the charging interface be carried out at low cost, but the charging interface can also be retrofitted in a simple manner.

[0010] The present invention can also be further improved by the following design solutions, which are each advantageous in themselves and can be combined arbitrarily.

[0011] According to a first feasible embodiment, the filter module can be designed such that when it is installed on the charging interface, it forms a material-free electrical connection with the protective conductor, the neutral conductor, and at least one outer conductor respectively. This has the advantage on the one hand that the filter module can be installed at the charging interface without using soldering and / or welding tools. On the other hand, the filter module in this embodiment can also be removed from the charging interface in a non-destructive manner, so that the filter module can be maintained or repaired particularly simply.

[0012] By equipping the filter module with at least three contact springs, a material-free electrical connection with the corresponding conductors can be generated in a simple manner. When the filter module is installed on the charging interface, the contact springs can deform elastically and / or plastically, so that the contact springs exert a corresponding contact force on the correspondingly assigned conductors. The aforementioned capacitive coupling is based on this contact force.

[0013] According to another feasible embodiment, the filter module can have at least one such contact spring for each conductor leading to the vehicle battery. The filter module can in particular be designed such that all outer conductors leading to the vehicle battery are capacitively coupled to the protective conductor respectively. Thus, if the charging interface has more than one outer conductor, the filter module has at least one contact spring for each outer conductor, especially for each current phase, in addition to the contact springs for the protective conductor and the neutral conductor.

[0014] The filter module can also advantageously be used for charging interfaces operating with polyphase current.

[0015] The filter module can optionally be designed to be pluggable onto the charging interface. The filter module can thus be installed on the charging interface completely without tools. The filter module can have at least three through-holes for this purpose, which are each designed for a protective conductor, a neutral conductor, or at least one outer conductor to pass through. The filter module preferably has through-holes for each conductor leading to the vehicle battery. The through-holes can extend parallel to each other and in the direction of the conductor run. In addition, the ends of the respective conductors can each pass through the through-holes.

[0016] The filter module can have, for example, a latching element, which is designed to hold the filter module on the charging interface preferably in a non-destructively detachable manner, or to be fixed in the charging interface, understood synonymously herein. The charging interface can have a latching element designed corresponding to the latching element of the filter module.

[0017] Tools, especially commercially common and usually available tools, can of course also be used when installing the filter module at the charging interface. The filter module can be fixed to the charging interface, for example, by a threaded connection after plugging in, or can be fixed to the charging interface without plugging in by a threaded connection. This improves the stability of the fixation without causing significant additional costs during installation.

[0018] For each of the at least three contact springs already mentioned, each contact spring can protrude into another one of the at least three through-holes. If there are more contact springs than through-holes, as long as at least one contact spring is assigned to each through-hole, multiple contact springs can also protrude into the same through-hole. In addition, it is sufficient that the contact spring is aligned with the correspondingly assigned through-hole along the conductor extension direction.

[0019] According to another feasible embodiment, the filter module can have at least two capacitors, one capacitor being arranged in the filter module in a switchable manner between the protective conductor and the neutral conductor, and at least one additional capacitor being arranged in the filter module in a switchable manner between the protective conductor and at least one outer conductor. The filter module preferably has a capacitor for each neutral conductor and / or outer conductor leading to the vehicle battery. Since capacitors are standard components, this embodiment can be manufactured particularly inexpensively.

[0020] The contact springs already mentioned can be used to connect one electrode terminal of each capacitor to the conductor leading to the vehicle battery respectively. The contact spring can be conductively connected to the electrode terminal of the capacitor, for example, and protrude into the through-hole provided for the protective conductor. Another contact spring can be conductively connected to the other electrode terminal of the same capacitor and protrude into the through-hole provided for the neutral conductor.

[0021] A similar contact spring connection structure for the vias used to protect the conductor and at least one outer conductor may be present in at least one additional capacitor. The contact spring protruding into the via of the protective conductor can be conductively connected to at least two capacitors via a branch here.

[0022] The at least two capacitors are preferably each designed as Y-type capacitors and are thus particularly well-suited for the filter applications here.

[0023] The filter module may have a printed circuit board on which the at least two capacitors are arranged. In addition, the at least three contact springs may be arranged on this printed circuit board. Optionally, a module housing may also be provided, and the printed circuit board together with the above-mentioned components is accommodated in this module housing. At least three vias may extend through the substrate of the printed circuit board and through the module housing. The printed circuit board and, if necessary, the module housing improve the operability of the filter module.

[0024] The printed circuit board preferably has two conductor lines for each capacitor. One of the conductor lines can lead from the capacitor to the protective conductor here, while the corresponding other conductor line can lead from the same capacitor to the zero-conductor or at least one outer conductor. In particular, the above-mentioned conductive connection between the contact spring and the respectively assigned capacitor can be achieved through these conductor lines.

[0025] According to another alternatively implementable embodiment, the filter module may have a grid structure, where the grid structure has two grid elements for each capacitor. The grid elements perform a dual function here because they can simultaneously perform the function of the contact spring and the conductor lines of the printed circuit board.

[0026] The grid structure can be blanked from a conductive material, for example, where all the grid elements initially exist in the form of a continuous blanked grid. Then, the blanked grid is at least sectionally injection-molded with plastic to form the above-mentioned module housing. Finally, the blanked grid is mechanically separated into individual grid elements. To save materials, the resulting separation positions between the individual grid elements do not need to be injection-molded with plastic.

[0027] According to another feasible embodiment, the filter module can be designed as a retrofit element for a type 1 charging interface, a type 2 charging interface, and / or a GB-AC charging interface. This advantageously results in compatibility with common interfaces. This expands the application scope of the present invention.

[0028] Furthermore, the technical problem raised at the beginning is solved by a charging device for a vehicle battery, wherein the charging device has an electrical filter module according to one of the above embodiments, a charging interface for the vehicle battery, a protective conductor leading to the vehicle battery, a neutral conductor leading to the vehicle battery, and at least one outer conductor leading to the vehicle battery, wherein the filter module capacitively couples the protective conductor to the neutral conductor and capacitively couples the protective conductor to at least one outer conductor in the state of being installed on the charging interface.

[0029] The charging device benefits from the functions and advantages of the filter module. In particular, the charging device can be manufactured more easily than a conventional charging device with a fixedly installed filter. If the filter module is not required in the charging device, it can be omitted in a simple manner.

[0030] According to a feasible exemplary embodiment, the filter module can be installed on the charging interface without material bonding, especially without soldering. Thereby, the charging device can not only be manufactured at low cost, but also the charging device can be modified, maintained, and / or repaired particularly at low cost.

[0031] Optionally, the charging interface can have a user-side plugging surface and a device-side plugging surface pointing away from the user-side plugging surface. Without considering the cover plate and / or the protective cover, the user-side plugging surface is accessible from the outside for the vehicle user and is used to form a temporary plug connection with the mating plug of the charging interface during the duration of the charging process. The device-side plugging surface is not directly accessible to the vehicle user because it is fixedly installed on the vehicle side, the battery side, or the grid side. In the scope of device manufacturing, an internal cable plug is inserted into the device-side plugging surface, and the plug connection exists throughout the entire operation.

[0032] The protective conductor, the neutral conductor, and at least one outer conductor of the charging device can extend through the cable extending from the cable plug. The charging interface can have contact elements, especially a contact pin or a contact sleeve, for each of the above conductors at the device plugging surface. Corresponding mating parts of the contact elements are provided in the cable plug. The filter module is inserted over the contact elements through its through holes here. The contact springs themselves contact the respectively assigned contact elements and thus contribute to the capacitive coupling.

[0033] If the filter module is installed, especially inserted over, the device-side plugging surface, a saving in construction space is achieved. The filter module can also be placed, especially inserted into, the finger protection flange of the device-side plugging surface here. The filter module is preferably located between the device-side plugging surface and the cable plug already mentioned.

[0034] A component, in particular a mounting component, having an electrical filter module and at least two charging interfaces according to one of the above-described embodiments also solves the technical problem stated at the beginning. Each charging interface can here have a user-side plugging face and a device-side plugging face pointing away from the user side, where the charging interfaces are different from one another with respect to their user-side plugging faces and are constructed identically with respect to their device-side plugging faces, and where the filter module is designed to be installable, in particular pluggable, onto the identically constructed device-side plugging faces.

[0035] In addition to the already described advantages of the filter module, the advantage of the component according to the invention lies in that it can be smoothly adapted to the charging interfaces required according to the application situation. In particular, no changes need to be made to the filter module. Accordingly, the scope of application of the invention is expanded.

[0036] Finally, the technical problem stated at the beginning is also solved by a battery system which, in addition to a vehicle battery, has a charging device and / or the above-described component. The protective conductor, the neutral conductor and at least one outer conductor are here each connected to the vehicle battery. In addition to the already described protective effect of the filter module, the battery system also benefits from the above-described advantages of the filter module, which are reflected in the manufacturing process of the battery system. Description of the Drawings

[0037] The invention will be explained in more detail below on the basis of a plurality of embodiments with reference to the drawings, and the different features according to the above description of these embodiments can be combined with one another as required.

[0038] In the drawings:

[0039] Figure 1 A schematic perspective view of a filter module according to a first embodiment is shown;

[0040] Figure 2 A schematic perspective view of a filter module according to a second embodiment is shown;

[0041] Figure 3 A schematic perspective view of a charging device according to a feasible embodiment is shown;

[0042] Figure 4 A schematic perspective view of a component according to a feasible embodiment is shown;

[0043] Figure 5 A schematic cross-sectional view of a filter module according to a third embodiment is shown;

[0044] Figure 6 A schematic cross-sectional view of a charging device according to another feasible embodiment is shown in a top view. Detailed Description of the Embodiments

[0045] First, refer to Figure 1 , Figure 2 and Figure 5 which schematically shows a possible embodiment of the electrical filter module 1. Then, refer to Figure 3 and Figure 6 to describe the schematic structure of a possible embodiment of the charging device 2 according to the present invention. Finally, refer to Figure 4 to explain the components according to the present invention.

[0046] The filter module 1 according to the present invention is provided for common use with an alternating current operating charging interface 6 (see Figure 3 ) of a vehicle battery (not shown). The charging interface 6 and the filter module 1 together form components of the charging device 2.

[0047] The charging interface 6 can be a vehicle-side or grid-side device of the charging infrastructure, such as a charging socket 8 or a charging plug (not shown). The charging interface 6 is used to charge by connecting the vehicle battery of an electric vehicle (not shown) to an alternating current source (not shown).

[0048] An electric vehicle is understood here as a vehicle operating purely electrically or a vehicle having an electric drive device as a partial drive device, such as a hybrid vehicle, especially a plug-in hybrid vehicle, regardless of its size, that is, including passenger cars, trucks, and commercial vehicles, as well as agricultural and forestry vehicles.

[0049] As can be seen from Figure 3 , the charging interface 6 can have a user-side plugging surface 10 and a device-side plugging surface 12 pointing away from the user-side plugging surface 10. The user-side plugging surface 10 is externally accessible to the vehicle user here and is used to form a temporary plug connection with a mating plug (not shown) of the charging interface 6 during the duration of the charging process. The device-side plugging surface 12 is not directly accessible to the vehicle user because it is fixedly mounted on the vehicle side, battery side, or grid side. In the context of device manufacturing, an internal cable plug 14 is inserted into the device-side plugging surface 12, and during the entire duration of operation, this plug connection always exists.

[0050] The cable 16 extends from the vehicle battery or the current source to the cable plug 14. The cable 16 has a protective conductor 18, a neutral conductor 20, and at least one outer conductor 22. The protective conductor 18 serves as a ground conductor 24 here, the neutral conductor 20 serves as a neutral conductor 26, and at least one outer conductor 22 serves as a phase conductor 28. The respective conductors 18, 20, 22 all extend through the cable 16 along a common conductor running direction 30.

[0051] On the plug-in surface 12 on the device side, the charging interface 6 can have contact elements 32 assigned thereto, in particular contact pins 34 or contact sleeves (not shown), for each of the above-mentioned conductors 18, 20, 22. Corresponding mating parts (not shown) of the contact elements 32 are provided in the cable plug. Thus, the contact elements 32 are parts of the respectively assigned conductors 18, 20, 22.

[0052] Figure 1 and Figure 2 the charging interface 6 shown by dashed lines 36 in each of them has a protective conductor 18, a neutral conductor 20 and an outer conductor 22. While Figure 3 and Figure 4 the charging interface 6 shown has a protective conductor 18, a neutral conductor 20 and three outer conductors 22a, 22b, 22c, because these charging interfaces operate with three-phase current. Of course, two, four or more outer conductors 22 can also be provided.

[0053] The filter module 1 is designed to be externally mounted on the charging interface 6. The filter module 1 can also be selectively designed to be plugged onto the charging interface 6, in particular its contact elements 32. The filter module 1 can have at least three through-holes 28 for this purpose, and the through-holes are respectively designed for the protective conductor 18, the neutral conductor 20 or at least one outer conductor 22, in particular the respectively assigned contact elements 32, to pass through. Due to the number of conductors, Figure 3 and Figure 4 the filter module 1 shown has five through-holes 28.

[0054] As can be seen from Figure 1 and Figure 2 the through-holes 28 can extend parallel to each other and along the direction of the conductor 30. The relative position 40 between the through-holes 28 is adapted to the position 42 of the conductors 18, 20, 22 or their respectively assigned contact elements 32 within the charging interface 6. The filter module 1 can be designed, for example, for a type 1 charging interface, a type 2 charging interface and / or a GB-AC charging interface.

[0055] As can be seen from Figure 3 and Figure 4 the filter module 1 can be mounted, in particular plugged, on the plug-in surface 12 on the device side. The filter module 1 can preferably be arranged between the plug-in surface 12 on the device side and the cable plug 14. The filter module 1 can also be inserted, in particular inserted, into the finger protection flange 44 of the plug-in surface 12 on the device side. If the conductors 18, 20, 22 or their respectively assigned contact elements 32 are separated from each other by a partition wall 46 in the finger protection flange 44, the filter module 1 can have corresponding openings 48 and / or slots 50 into which the partition wall 46 can extend.

[0056] The filter module 1 is also designed to capacitively couple the protective conductor 18 to the neutral conductor 20. In addition, the filter module 1 is also designed to capacitively couple the protective conductor 18 to at least one outer conductor 22. In other words, the filter module 1 can capacitively couple the protective conductor 18 to the neutral conductor 20 and the protective conductor 18 to at least one outer conductor 22 in the state 52 when installed on the charging interface 6 (see Figure 6 ). The capacitive coupling between the two conductors is generated by connecting a capacitive element, such as a capacitor, between the two conductors.

[0057] Therefore, the filter module 1 can be used to protect the vehicle battery and all associated electrical and electronic components from grid faults, especially so-called surges or impulse events. Through the capacitive coupling of the corresponding conductors, the voltage peaks in the kV range that occur briefly (e.g., 40 ns) in such events are completely or at least sufficiently guided from the neutral conductor 20 or the outer conductor 22 to the protective conductor 18.

[0058] To achieve this capacitive coupling, the filter module 1 can have at least two capacitors 54, where one capacitor 54 can be arranged in the filter module 1 in a switchable manner between the protective conductor 18 and the neutral conductor 20, and at least one additional capacitor 54 can be arranged in the filter module 1 in a switchable manner between the protective conductor 18 and at least one outer conductor 22. Figure 3 and Figure 4 The shown filter module 1 has a capacitor 54 for each neutral conductor 20 and outer conductor 22 (a total of four capacitors 54).

[0059] The capacitors 54 are preferably each designed as Y - type capacitors 56. In the capacitor 54 that can be switched between the protective conductor 18 and the neutral conductor 20, the electrode connection 58 can be conductively connected to the protective conductor 18, while the other electrode connection 58 of the capacitor 54 is conductively connected to the neutral conductor 20. This also applies to the capacitor 54 that can be switched between the protective conductor 18 and the outer conductor 22.

[0060] Optionally, the filter module 1 can be designed to form a material - free electrical connection with the protective conductor 18, the neutral conductor 20, and at least one outer conductor 22 when installed on the charging interface 6. By equipping the filter module 1 with at least three contact springs 60, such a material - free electrical connection can be produced in a simple manner. When the filter module 1 is installed on the charging interface 6, the contact springs 60 can deform elastically and / or plastically, so that the contact springs exert corresponding contact forces on the correspondingly assigned conductors 18, 20, 22.

[0061] The capacitive coupling is based on this contact force, so that the filter module 1 can be mounted on the charging interface 6 without material bonding, in particular without soldering. The filter module 1 is here plugged over the contact elements via its through-holes 28. The contact springs 60 themselves contact the respectively assigned contact elements 32 and thus contribute to the capacitive coupling. The filter module 1 can also optionally be provided with a latching hook 62 which prevents the filter module 1 from inadvertently becoming detached from the charging interface 6 (see Figure 5 ).

[0062] As Figure 1 shown, each of at least three contact springs 60 can protrude into a different one of at least three through-holes 28. If more contact springs 60 are provided than through-holes as Figure 2 shown, as long as each through-hole 28 is assigned at least one contact spring 60, a plurality of contact springs 60 can also protrude into the same through-hole 28.

[0063] The contact springs 60 can be used to connect one of the electrode terminals 58 of the capacitor 54 to one of the conductors 18, 20, 22. For a capacitor 54 which can be switched between the protective conductor 18 and the neutral conductor 20, one of the contact springs 60 can, for example, be conductively connected to one of the electrode terminals 58 and protrude into the through-hole 28 provided for the protective conductor 18. Another contact spring 60 can be conductively connected to the other electrode terminal 58 of the same capacitor 54 and protrude into the through-hole 28 provided for the neutral conductor. This also applies to a capacitor 54 which can be switched between the protective conductor 18 and the outer conductor 22. Furthermore, it is sufficient for the contact springs 60 to be aligned with the respectively assigned through-holes 28 along the conductor running direction 30 without protruding therein (see Figure 2 ).

[0064] Optionally, the contact spring 60 protruding into the through-hole 28 of the protective conductor 18 can be conductively connected to at least two capacitors 54 via a branch 64 (see Figure 1 ). Alternatively, a separate contact spring 60 can be provided for each capacitor at the through-hole 28 of the protective conductor 18 (see Figure 2 ).

[0065] Figure 1 An embodiment of the filter module 1 which can be simply manufactured is shown, which has a grid structure 66 for an application with three conductors 18, 20, 22. Figure 5Shows a filter module 1 with a grid structure 66 for an application having five conductors 18, 20, 22a, 22b, 22c. The grid structure 66 can, for example, be blanked from a conductive material and optionally encapsulated by injection molding with plastic 68. The capacitor 54 can likewise be encapsulated by injection molding with plastic 68 (see Figure 5 ), or be arranged on the plastic after the curing process of the plastic 68 (see Figure 1 ).

[0066] In Figure 5 the illustrated embodiment, the plastic 68 forms a module housing 70 that holds the grid structure 66 and the capacitor 54. The through-hole 28 is guided through the module housing 70 here.

[0067] For each capacitor 54, the grid structure 66 can have no more than two grid elements 72a, 72b. Here, one grid element 72a or 72b is conductively connected (e.g., welded and / or brazed) to the electrode connection 58 of the correspondingly assigned capacitor 54.

[0068] In other words, each capacitor 54 is located between its two grid elements 72a and 72b. In addition, each grid element 72a, 72b forms a contact spring 60. The capacitor 54 can also share one grid element 72a on the side guided towards the protective conductor 18. In other words, each capacitor 54 can be conductively connected (e.g., welded and / or brazed) to the grid element 72a guided towards the protective conductor 18 at one of its electrode connections 58. This is shown in Figure 6 .

[0069] The grid structure 66 can exist in the form of a blanked grid after blanking, where all grid elements 72a, 72b are initially continuous. Then the blanked grid can be combined with the module housing 70. Finally, the blanked grid is mechanically separated into individual grid elements 72a, 72b. It can be seen from Figure 5 the resulting separation positions 74 between the individual grid elements 72a, 72b here.

[0070] According to Figure 2 the shown alternative embodiment, the filter module 1 can have a printed circuit board 76 on which the capacitor 54 is arranged. In addition, the contact spring 60 can be arranged on the printed circuit board 76. The through-hole 28 can extend through the substrate 78 of the printed circuit board 76.

[0071] The printed circuit board 76 preferably has two conductor lines 80a, 80b for each capacitor 54. One of the conductor lines 80a can hereby lead from the respective capacitor to the protective conductor 18, while the respective other conductor line 80b can lead from the same capacitor 54 to the neutral conductor 20 or at least one outer conductor 22. In particular, the aforementioned conductive connection between the contact spring 60 and the respectively assigned capacitor 54 can be realized by means of these conductor lines 80a, 80b.

[0072] Figure 4 The component 4 shown is in particular a mounting component 82 which has an electrical filter module 1 and at least two charging interfaces 6a, 6b. As already mentioned, each of the at least two charging interfaces 6a, 6b can hereby have a user-side plug face 10a or 10b and a device-side plug face 12a or 12b which is directed away from the user-side plug face. The difference between the charging interfaces 6a, 6b lies in their user-side plug faces 10a, 10b. The charging interfaces 6a, 6b are constructed identically with respect to their device-side plug faces 12a, 12b. The filter module 1 is designed to be able to be installed accordingly, in particular to be plugged onto the identically constructed device-side plug faces 12a, 12b as shown by the dashed arrow 84.

[0073] 1 Filter module

[0074] 2 Charging device

[0075] 4 Component

[0076] 6 Charging interface

[0077] 8 Charging socket

[0078] 10, 10a, 10b User-side plug face

[0079] 12, 12a, 12b Device-side plug face

[0080] 14 Cable plug

[0081] 16 Cable

[0082] 18 Protective conductor

[0083] 20 Neutral conductor

[0084] 22, 22a, 22b, 22c Outer conductor

[0085] 24 Grounding conductor

[0086] 26 Neutral conductor

[0087] 28 Phase conductor

[0088] 30 Conductor running direction

[0089] 32 Contact elements

[0090] 34 Contact pins

[0091] 36 Dotted lines

[0092] 38 Through holes

[0093] 40 Relative positions

[0094] 42 Positions

[0095] 44 Finger protection flanges

[0096] 46 Partition walls

[0097] 48 Openings

[0098] 50 Grooves

[0099] 52 Installed states

[0100] 54 Capacitors

[0101] 56 Y - type capacitors

[0102] 58 Electrode connectors

[0103] 60 Contact springs

[0104] 62 Latching hooks

[0105] 64 Branches

[0106] 66 Grid structures

[0107] 68 Plastics

[0108] 70 Module housings

[0109] 72a, 72b Grid elements

[0110] 74 Separation positions

[0111] 76 Printed circuit boards

[0112] 78 Base materials

[0113] 80a, 80b Conductor lines

[0114] 82 Mounting components

[0115] 84 Dotted - line arrows

Claims

1. An electrical filter module (1) for common use with a charging interface (6) for alternating current operation of a vehicle battery, wherein, The filter module (1) is designed for - capacitively coupling a protective conductor (18) leading to the vehicle battery to a neutral conductor (20) leading to the vehicle accumulator, and furthermore - capacitively coupling the protective conductor (18) to at least one outer conductor (22) leading to the vehicle battery, wherein the filter module (1) is designed to be pluggable onto the charging interface (6) from the outside.

2. The electrical filter module (1) according to claim 1, characterized in that, The filter module (1) is designed to form a material-free electrical connection with the protective conductor (18), the neutral conductor (20), and at least one outer conductor (22) when mounted on the charging interface (6).

3. The electrical filter module (1) according to claim 1 or 2, characterized in that, The filter module (1) has at least three through-holes (38), which are each designed for the protective conductor (18), the neutral conductor (20), or at least one outer conductor (22) to pass through.

4. The electrical filter module (1) according to claim 3, characterized in that, The filter module (1) has at least three contact springs (60), wherein each contact spring (60) projects into another one of the at least three through-holes (38).

5. The electrical filter module (1) according to any one of claims 1 to 4, characterized in that, The filter module (1) has at least two capacitors (54), wherein one capacitor (54) can be arranged in the filter module (1) in a switchable manner between the protective conductor (18) and the neutral conductor (20), and at least one further capacitor (54) can be arranged in the filter module (1) in a switchable manner between the protective conductor (18) and at least one outer conductor (22).

6. The electrical filter module (1) according to claim 5, characterized in that, The at least two capacitors (54) are each designed as Y-capacitors.

7. The electrical filter module (1) according to claim 5 or 6, characterized in that, The filter module (1) has a printed circuit board (76), on which the at least two capacitors (54) are arranged, wherein the printed circuit board (76) has two conductor tracks (80a, 80b) for each capacitor (54).

8. The electrical filter module (1) according to claim 5 or 6, characterized in that, The filter module (1) has a grid structure (66) punched from a conductive material, wherein the grid structure (66) has two grid elements (72a, 72b) for each capacitor (54).

9. The electrical filter module (1) according to one of claims 1 to 8, characterized in that, The filter module (1) is designed to capacitively couple each outer conductor (22) leading to the vehicle battery to the protective conductor (18).

10. The electrical filter module (1) according to one of claims 1 to 9, characterized in that, The filter module (1) is designed as a retrofit element for a type 1 charging interface, a type 2 charging interface, and / or a GB-AC charging interface.

11. A charging device (2) for a vehicle battery, wherein, The charging device (2) has - an electrical filter module (1) according to one of claims 1 to 10, - a charging interface (6) of the vehicle battery, - a protective conductor (18) leading to the vehicle battery, - a neutral conductor (20) leading to the vehicle battery, and - at least one outer conductor (22) leading to the vehicle battery, wherein the filter module (1) capacitively couples the protective conductor (18) to the neutral conductor (20) and the protective conductor (18) to at least one outer conductor (22) in the state (52) of being mounted on the charging interface (6).

12. The charging device (2) according to claim 11, characterized in that, The filter module (1) is mounted on the charging interface (6) without material bonding.

13. The charging device (2) according to claim 11 or 12, characterized in that, The charging interface (6) has a plugging surface (10) on the user side and a device-side plugging surface (12) that points away from the plugging surface (10) on the user side, wherein the filter module (1) is arranged on the device-side plugging surface (12).

14. A component (4) having an electrical filter module (1) according to one of claims 1 to 10 and at least two charging interfaces (6a, 6b), wherein, Each charging interface (6) has a plugging surface (10a, 10b) on the user side and a device-side plugging surface (12a, 12b) that points away from the plugging surface (10a, 10b) on the user side, wherein the charging interfaces (6a, 6b) are different in terms of their plugging surfaces (10a, 10b) on the user side and are identical in terms of their plugging surfaces (12a, 12b) on the device side, and wherein the filter module (1) is designed to be arranged on the identically constructed device-side plugging surfaces (12a, 12b).

15. A battery system, the battery system having a charging device (2) according to one of claims 11 to 13 and / or a component (4) according to claim 14 and a vehicle battery, wherein, The protective conductor (18), the neutral conductor (20) and at least one outer conductor (22) are each connected to the vehicle battery.

Images