Charging unit for electric vehicles

Abstract

The invention relates to a charging unit for electric vehicles, comprising a power module, a communication module and a user interface module, wherein the power module has a first charging control circuit for charge control with an electric vehicle. A communication bus connects the communication module and the user interface module to the power module.

Description

[0001] PW / PW 180680DE

[0002] January 30, 2019

[0003] Charging unit for electric vehicles

[0004] The subject matter concerns a charging station for electric vehicles, a docking station for charging stations, a charging unit, and modules installed in a charging station.

[0005] The development of charging infrastructure is crucial for the widespread adoption of electric mobility. This requires the installation of a large number of charging stations for electric vehicles in both public and semi-public spaces. These charging stations should blend seamlessly into the streetscape and are therefore typically designed as charging columns. Charging columns are characterized by their compact design and small footprint. They are usually stele-like and feature integrated or connectable charging electronics.

[0006] As mentioned, the extensive expansion of the charging infrastructure is a key factor for the acceptance of electromobility. Therefore, charging stations must be installed as comprehensively and in large numbers as possible within a short timeframe. This presents a challenge in terms of the design, construction, and actual on-site installation of the charging stations, as the mass deployment necessitates that they be manufactured on an industrial scale and be particularly easy to install on-site, ideally by a single person.

[0007] This is only partially true for existing charging stations. Firstly, on-site installation is complex and time-consuming, and secondly, the electronics in charging stations cannot yet be produced cost-effectively and in large quantities.

[0008] For particularly easy installation of charging technology, it is essential that it can be installed in just a few steps, even by inexperienced users. The connection to the power supply should ideally be decoupled from the other charging equipment to ensure that even laypersons can install the charging technology. Maintenance and replacement of charging equipment, which may be necessary due to defects or technology changes, should also be as simple as possible.

[0009] The above-mentioned problem is solved in the present case by a charging unit according to claim 1 and a system according to claim 18.

[0010] The charging unit comprises a power module (HPS module), a communication module (ECU module), and a user interface module (UI module). The power module includes a primary charging control circuit for managing charging with an electric vehicle. The requirements for charging units can vary significantly depending on the application. Nevertheless, it is desirable to create a standardized charging unit structure that can be adapted as needed. In particular, it is essential that the charging unit includes basic charging control functions. Therefore, a primary charging control circuit is integrated into the power module.

[0011] Additional functions, such as extended charging functionalities, billing, communication, user interaction, and the like, may or may not be required. For this reason, it is proposed that a communication bus connects the communication module and the user interface module to the power module. The communication module and / or the user interface module can be connected via the communication bus as needed. The function of the power module, particularly the charging control circuit, is initially independent of this, so the charging unit is configured to provide charging functionalities even without a communication module connected to the communication bus. If the communication module is connected, further functions such as encryption of billing data and the exchange of...

[0012] PW / PW 180680DE January 30, 2019 Charging parameters, transmission of information and the like, are provided by the communication module.

[0013] If user interaction is desired, it can be provided by the user interface module as soon as it is connected to the communication bus. The communication bus serves to coordinate and synchronize the respective functions on the different modules, so that, if necessary, the power module is always aware of the presence of a communication module and / or a user interface module and can also control, trigger, and / or detect their functions. The same applies, of course, to the communication module and the user interface module themselves.

[0014] According to one embodiment, it is proposed that the communication module and the user interface module can optionally be connected to the power module via the communication bus. As already mentioned, the functions of the first charging control circuit of the power module are at least partially independent of this. If, for example, a second charging control circuit is present on the communication module, it can override the first charging control circuit, at least in part, but can also take over and supplement functions of the first charging control circuit.

[0015] According to one embodiment, it is proposed that the communication module and the user interface module can be connected to the power module via the communication bus in a plug-and-play manner. The connected modules can then register and deregister with the power module via the bus. In addition to communication functionality, the communication bus also provides, for example, a power supply for the communication module and / or the user interface module. A multi-voltage supply is also possible, for example, 3.3 V, 5 V, and / or 12 V. Both communication and power supply can be managed via a

[0016] PW / PW 180680DE January 30, 2019. A single, multi-core cable, for example a flat cable, is used. An RS422 bus is particularly suitable as a communication bus between the respective modules. The power module, the communication module, and the user interface module are each mounted on their own circuit board. This also achieves mechanical decoupling of the functions of the respective modules, allowing them to be located in the charging unit if required.

[0017] As previously mentioned, the charging unit with the power module is intended to provide basic functionalities for charging an electric vehicle. Therefore, it is proposed that the first charging control circuit be set up independently of the communication module and / or the user interface module for controlling charging with an electric vehicle.

[0018] It is proposed that the charging control circuit be configured for charging control using pulse width modulation. In particular, communication with the electric vehicle should take place exclusively via a single power conductor. The first charging control circuit is specifically configured for charging control according to DIN 61851.

[0019] In addition to the charging control circuit on the power module, the communication module can have a second, independent charging control circuit for charging with an electric vehicle.

[0020] It is proposed that the second charging control circuit have an expanded range of functions compared to the first charging control circuit. This expanded functionality relates in particular to the ability to negotiate charging parameters with the electric vehicle. It is proposed that the second charging control circuit be configured to communicate with the electric vehicle via a pilot conductor for charging control. Specifically, the second charging control circuit supports a communication protocol according to DIN 15118 or CHAdeMO.

[0021] PW / PW 180680DE January 30, 2019 A charging outlet is arranged on the power module. In addition to the connections for phase and neutral conductors, this charging outlet also has a connection for an earth conductor, a connection for a PP (Plug Present) contact, and a CP (Pilot) contact.

[0022] In particular, the PP and CP contacts of the charging outlet are connected to the second charging control circuit via the communication bus. This allows the second charging control circuit to communicate with the electric vehicle, at least via the CP and PP contacts.

[0023] The second charging control circuit may contain functions that are complementary to functions of the first charging control circuit. In this case, it is proposed that the second charging control circuit overrides the charging control of the first charging control circuit, at least in part.

[0024] The power module serves primarily for power monitoring and protection. For power protection, it incorporates, in particular, a circuit breaker, a fuse, a residual current device (RCD), a ground fault circuit interrupter (GFCI) sensor, a welding detection sensor, and / or a control unit for an electrical connector release. Monitoring can be performed phase-by-phase or for all phases simultaneously, with phase-by-phase monitoring always being preferred.

[0025] The communication module can include components for wireless communication in a local area network and / or a wide area network. In particular, radio protocols such as LTE, UMTS, GSM, 5G, WLAN (e.g., according to IEEE E802.11), Bluetooth, RFID, NFC, or other protocols for wired and / or wireless communication are integrated into the communication module.

[0026] PW / PW 180680DE January 30, 2019 The communication module can also contain an encryption circuit, which can, for example, be implemented as a TPM (Trusted Platform Module). This allows, for example, communication with a smart meter or iMS in the docking station using SML or TLS, and conversely, secure communication with a billing center.

[0027] The communication module allows the charging unit to be configured as either a master or a slave. This can be achieved by optionally integrating a master controller or a slave controller onto the communication module. When configured as a master, the communication module can, for example, be equipped with advanced communication functionalities for wireless communication. A charging unit with a communication module configured as a master can control other charging units that only have a communication module with a slave controller. This allows multiple charging units to be equipped with advanced communication capabilities via a local network, which is controlled, for example, by the communication module. Only one of the charging units acts as the master, while all others operate as slaves.

[0028] A display interface and / or a touch display interface can also be integrated into the communication module. One of these interfaces can be used to control a display or touch display located on the user interface module. Alternatively, one of these interfaces can also be used to control a display or touch display that is physically separate from the user interface module, for example, housed in a separate enclosure from the charging unit. This allows the charging unit to be used as a control center for, for example, information and / or advertising displays. The communication and control capabilities are integrated into the communication module, and the displays themselves no longer require these functionalities.

[0029] PW / PW 180680DE January 30, 2019 According to one embodiment, it is proposed that a communication module equipped with a master controller can receive measured values ​​from a communication module equipped with a slave controller via an interface, for example, a LAN interface. These measured values ​​can be acquired by the measuring device on the charging unit, which is equipped with the slave controller, and transmitted to the charging unit with the master controller. The communication module with the master controller can encrypt the received measured values ​​for further billing. The encrypted measured values ​​can be transmitted by the encryption circuit to a billing center.

[0030] Various sensors can be arranged on at least one side of the circuit board of the user interface module. These sensors are typically located on the side of the circuit board that faces a cover surface when connected. Examples of sensors include radar sensors, capacitive or inductive proximity sensors, and similar devices. A radio antenna, particularly a near-field antenna, can also be arranged on the user interface module to support RFID and / or NFC functionality. The antenna can be integrated directly into the PCB.

[0031] Furthermore, a display interface for at least one display and / or a touch display interface for at least one touch display can be arranged on the user interface module.

[0032] A display, a touch display and / or a brightness sensor can also be arranged on the user interface module.

[0033] The touch display is preferably controlled via a touch display interface on the communication module. The (touch) display is controlled by the communication module. The user interface module

[0034] PW / PW 180680DE 30 January 2019 preferably only records the (touch) display itself and positions it correctly on the lid relative to the lid surface.

[0035] According to one embodiment, it is proposed that the power module is arranged in a tub assembly and that the communication module and / or the user interface module are arranged in a cover assembly.

[0036] The docking station features a tray-shaped housing with a base and surrounding side walls. It also includes a cable entry point into the housing. This cable entry point can be located in either the side walls or the base. Since the docking station is designed for installation either directly against a wall or in a recess, such as a pedestal, the cable entry point is located either laterally in the side walls or in the base.

[0037] Inside the docking station's housing, at least one terminal block for a power cable is provided. The power cable, for example, multi-phase (single-phase or three-phase), can be connected to this terminal block along with, for example, a neutral conductor and / or a protective earth conductor. The terminal block is preferably located at the bottom of the housing. In addition to the power cable terminal block, a contact strip or a socket for a network connection, for example, according to the Cat 5, Cat 6, or Cat 7 standard or similar, may also be provided. The network connection enables connection to a local area network (LAN) external to the docking station or to a wide area network (WAN), such as DSL, ADSL, or similar.In order to form a local network (charging network) with other charging stations starting from the docking station and to be connected to a network that is external to the charging network, the network connection can be set up to connect two independently operable networks.

[0038] PW / PW 180680DE January 30, 2019 To simplify the installation of charging technology, a systematic separation between a connection level for the power supply and a supply level for the charging technology is proposed. The docking station, particularly by utilizing the terminal strip, serves as the connection level for a power supply network and includes, within its housing, a receptacle for an energy meter, such as an intelligent metering system (iMS) or a smart meter. The docking station housing separates this connection level for the power supply network from the supply level for the charging technology by providing a power connection within the docking station for a charging unit located outside the docking station.The power connection has in particular a socket with several connection contacts, each of which can be contacted with a phase of the mains connection cable, the neutral conductor and, if applicable, a protective conductor.

[0039] Furthermore, a converter or rectifier may be provided within the docking station, which supplies at least two additional connection contacts of the power connection, and through which the charging technology located outside the docking station may, if necessary, draw additional electrical power.

[0040] The separation between the connection and power supply levels makes it possible for even laypersons to install charging technology. In practice, it is only necessary for a qualified technician to connect the docking station to the mains cable. Once this connection is complete, the charging station housing can be largely closed. No further installation of charging equipment is initially required.

[0041] The docking station itself has no "intelligence" in the sense of being able to control the charging process. Rather, a separate charging unit can be easily and later added.

[0042] The PW / PW 180680DE (January 30, 2019) can be easily connected to the docking station via the power connection by a layperson. Since the power connection to the mains supply is located inside the docking station, there is no risk of electric shock for the person connecting the charging unit to the docking station.

[0043] It is proposed that the docking station be connectable to a charging unit. This charging unit serves as the power supply level for the charging technology and, in particular, includes a charging control circuit. Depending on the application, different requirements may exist for the charging technology. A universally applicable docking station that secures the high-voltage connection to the electrical grid offers the advantage that differently configured charging units can be mechanically and electrically connected to it. This means that initially only the docking station needs to be installed, and the charging technology can then be connected to the docking station.

[0044] If newer or modified charging technology becomes necessary, it is possible to simply detach the charging unit from the docking station and connect a new charging unit to the docking station via the power connection. If the charging unit is also encapsulated in its own housing, connecting the charging unit to the docking station can be done by someone without technical expertise.

[0045] This offers particular advantages in the installation process, as the provision of the charging unit can be decoupled from the docking station installation. After a professional has installed the docking station, any layperson can connect their preferred charging technology to the docking station using a suitably prepared charging unit. This significantly simplifies the installation process for the charging technology provider. In a single, straightforward installation step, the docking station is connected to the power supply network. Afterward, the installation can be completed by a layperson.

[0046] PW / PW 180680DE January 30, 2019 The connection level is free of charging technology for an electric vehicle. The connection level is located within the docking station housing. It is designed to accommodate the mains power cable. In addition to the cable entry, a means of securing and strain relief may be provided. Furthermore, the connection level accommodates the terminal block for the mains power cable. The connection level is also designed to accommodate the energy meter and the power connection for connecting to the charging unit. The connection level is designed so that the energy meter can be optionally installed. An initial configuration of the docking station may provide for the mains connection to be directly connected to the power connection via the terminal block.A second configuration of the docking station can provide that the network connection is first connected to the energy meter via the connection strip and from there to the power connection.

[0047] Inside the docking station housing, a recess for the energy meter is enclosed by side walls. These side walls can accommodate cable glands for power cables to and from the energy meter, connecting the meter to the terminal block on one side and the energy meter to the power connection on the other. This recess allows the energy meter to be isolated from the interior of the housing, which is necessary, for example, for tamper-proof measurement of electrical energy. The side walls of the recess can also include cable glands for a communication cable used to read the energy meter. The protocol for reading the energy meter can be SML and / or TLS.

[0048] The housing may be closed by a removable cover. The cover, along with the side walls, may have a recess for a seal. After the energy meter has been installed in the housing and

[0049] Once the PW / PW 180680DE was electrically connected on January 30, 2019, the opening for the energy meter can be closed with the cover. A seal can then be applied, preventing any subsequent non-destructive access to the energy meter.

[0050] For installation of the energy meter in the docking station, the station can have locking tabs on the side walls facing away from the ground, allowing the meter to be securely held in place. In particular, tool-free installation of the energy meter within the docking station is possible, which significantly simplifies the installation process.

[0051] According to one embodiment, it is proposed that a protective housing cover, detachably attached to the housing, has a through-hole that, when connected to the side walls, lies above the power connector located inside the housing. To close the docking station, the protective housing cover is placed onto the docking station. The electrical connections inside the docking station should be protected from external contact, so the protective housing cover should have as few through-holes as possible. A first through-hole can be located above the power connector. The power connector itself can be protected from contact with its terminals, as is common with power cable connectors.

[0052] In addition to the access point above the power connection, another access point may be located near a communication connection to allow the charging unit to be connected to the wide area network and / or the charging network, if necessary. Further access points are avoided as much as possible, so that the protective housing cover essentially seals the housing, particularly in areas where electrical cables run inside the housing between the terminal block, the energy meter, and / or the power connection.

[0053] PW / PW 180680DE January 30, 2019 As a rule, the protective housing cover is positioned at a distance from the power terminal, particularly its upper edge. To prevent manual access through the gap formed between the protective housing cover and the power terminal, i.e., between the lower edge of the protective housing cover and the upper edge of the power terminal, it is proposed that the protective housing cover have a first circumferential collar in the area of ​​the access opening, the collar engaging into the interior of the housing when installed. Alternatively, the power terminal may have a circumferential collar that, when installed, projects from the interior of the housing into the access opening of the protective housing cover. In particular, the collar has a depth that is at least equal to the distance between the underside of the protective housing cover and the top of the power terminal.The collar can also be larger and extend to the support, especially the circuit board, on which the power connector is mounted.

[0054] When mounting the charging unit on the docking station, a power connector of the charging unit can be inserted into a socket-shaped power port. To ensure protection against accidental contact when inserting the connector into the socket, the power connector of the charging unit is also protected by a circumferential second collar. According to an advantageous embodiment, this second collar can engage in an annular gap that is formed around the circumference between the first collar and the power port when the protective housing cover is mounted.

[0055] For manual monitoring of the meter reading and / or for the possibility of reading a meter identification, it is proposed that an opening be provided in the housing and / or in the protective housing cover in the area of ​​the reception for the energy meter as a viewing window for a reading area of ​​an energy meter.

[0056] PW / PW 180680DE January 30, 2019 The power cable of the mains connection is usually a rigid cable with only a single strand. The cable typically has a cross-sectional area of ​​at least 2.5 mm². 2 , preferably also, for example, 6 mm 2 , 10 mm 2 , 16 mm 2or the like. Such a rigid cable is difficult to bend and therefore also difficult to route. To ensure that the installation of the power cable at the terminal block is carried out correctly and, in particular, to simplify the wiring, it is proposed that a scale be provided on the bottom and / or side walls of the docking station housing. This scale is used to cut the power cable to length as it enters the housing through the cable entry point. The scale is positioned so that the power cable can be terminated for connection to the terminal block. This means that the installer can position the power cable against the scale and cut it to length, thus ensuring that the power cable can be precisely connected to the terminal block after stripping.Over- or under-length of the cut power cord is thus avoided, so that incorrect installations are virtually eliminated.

[0057] As explained earlier, the docking station is intended to serve as a connection point and be mechanically connectable to a charging unit forming the power supply level. It is proposed that the side walls and / or the protective housing cover have recesses that interact with the mounting hardware of a charging unit, ensuring that the charging unit rests completely on the protective housing cover of the docking station. The charging unit is installed on the docking station in a layered manner, with the charging unit resting completely on the docking station as an additional layer. The footprint of the docking station is essentially congruent with the footprint of the charging unit. Once the docking station is closed, the charging unit can be easily docked to the station using the mounting hardware.In a top view, the charging unit completely or substantially completely covers the docking station, in particular, the charging unit covers all electrical components within the housing of the docking station.

[0058] PW / PW 180680DE January 30, 2019 To prevent external access to the fasteners, it is proposed that the receptacles for the fasteners be located between the side walls and the protective housing. Specifically, radially inward-facing recesses are provided on the outer circumferential edge of the protective housing cover, into which the fasteners can be inserted. Thus, the fasteners are enclosed within the side walls of the docking station.

[0059] The fasteners can preferably be inserted through to the outer surface of the docking station's base for fastening. Therefore, it is proposed that corresponding openings be provided in the base of the housing, with the openings and the receptacles aligned. The fasteners can then be inserted through the receptacles into the base openings in a linear motion parallel to their length. This simplifies the installation of the charging unit on the docking station.

[0060] As previously explained, the docking station represents the connection level, while the charging unit represents the power supply level. To simplify installation between the charging unit and the docking station, the docking station only has connections for a power connection and preferably also a communication connection. Therefore, only a power connection and preferably a communication connection are established between the docking station and the charging unit. The power connection is established via the power connector, and the communication connection via, for example, a network cable.

[0061] The charging unit preferably surrounds the housing walls of the docking station completely. Only in the area of ​​a cable entry and / or cable exit are there any gaps.

[0062] PW / PW 180680DE 30 January 2019 a recess may be provided in the side walls of the charging unit encompassing the docking station.

[0063] The protective housing cover is preferably recessed from the upper level of the docking station, so that the side walls, when the protective housing cover is installed, extend beyond it in a collar-like fashion. This allows the side walls to ensure a seal of the docking station, for example, by providing circumferential sealing lips in the charging unit that correspond to the side walls and are pressed against the edges of the side walls when installed. The recessed design of the protective housing cover ensures that the sealing lips completely encircle the side walls.

[0064] Another aspect concerns a charging station with a base and a head, as well as a docking station, as described. This charging station has a recess in the head, surrounded by side walls. The docking station can be positioned within this recess. The power cable can be inserted into the docking station within this recess.

[0065] After the docking station is installed in the mounting bracket, an annular gap forms between the side wall of the docking station and the bracket. A housing wall of the charging unit can engage in this annular gap. When the charging unit is coupled to the docking station, it is placed onto the docking station from above. The surrounding side walls of the charging unit can engage in the annular gap, so that from the outside of the charging station it is not apparent that the charging unit is mounted on a docking station.

[0066] The charging station head can also have a receptacle for a docking station on each of two opposing front surfaces.

[0067] PW / PW 180680DE January 30, 2019 The charging unit can be mounted as a power supply level on a docking station configured as a connection level. For this purpose, the charging unit comprises a tub assembly and a cover assembly. The tub assembly, together with the cover assembly, forms a housing containing the charging technology for the charging unit. The charging technology is connected to a power supply in a modular system by mounting the charging unit to a docking station. This mounting is preferably tool-free.

[0068] The tank assembly contains at least one power module. This power module, also referred to below as the HPS module (High Power Safety module), comprises components necessary for power control and monitoring.

[0069] Within the charging tray assembly, a first charging control circuit and a charging outlet can also be arranged. The components arranged in the charging tray assembly can be sufficient to provide basic functionalities for charging an electric vehicle. The charging tray assembly comprises a base which, in the assembled state, faces a protective housing cover of the docking station. The side of the charging tray assembly opposite the base is preferably substantially closed by the cover assembly. The cover assembly serves to accommodate at least one communication module and at least one user interface module. The communication module allows the charging functions of the power module to be extended and, in particular, extended protocol functionalities to be implemented. A user interface module enables interaction with a user.The power module provides energy for both a communication module and a user interface module. The communication module can optionally be connected to a wide area network within the docking station. It can also optionally be connected to a charging network within the docking station.

[0070] PW / PW 180680DE January 30, 2019, must be connected to the docking station. The communication module can also establish communication in a short-range environment.

[0071] The communication module, hereinafter also referred to as ECU (Electronic Control Unit module), can function as a control computer and communication gateway.

[0072] The user interface module, hereinafter also referred to as UIB (User Interface Board), comprises operating and / or display elements, for example, at least one display, one touch display, one pictogram, one capacitive / inductive touch sensor, and / or one environmental sensor. These can be controlled and / or read by the UIB. The UIB can be connected to the ECU module in a modular fashion. In its basic configuration, a UIB has only status LEDs to indicate the operating state as a display element. In a multi-unit configuration, it includes and / or controls at least one of the additional operating and / or display elements mentioned above.

[0073] The charging unit can be connected to a docking station without tools via a power connector. A circuit board, designated as the main board, can be located within the docking station for this purpose, and it will house the power connector. For secure, tool-free connection between the charging unit and the docking station, either the main board circuit board can be mounted in the docking station in a plane parallel to the base of the docking station and / or parallel to the plane of the docking station's protective housing cover, or the HPS module can be mounted in a floating position parallel to the base of the docking station assembly.

[0074] Within the docking station, a functional separation between the power electronics and the communication electronics can be achieved. For this purpose, a circuit board can be installed within the docking station alongside the main board as an interface board, on which external data connections are linked to corresponding sockets. The sockets can be connected via patch cables, which are inserted into the

[0075] PW / PW 180680DE 30 January 2019 tub assembly will be introduced and connected there, in particular, to the ECU module.

[0076] The interface board preferably has a connector that provides connections for a general-purpose input / output bus (GPIO) on the one hand and a CAN bus on the other. This makes the wiring between the interface board and the ECU module particularly simple, as two different buses can be carried over a single cable.

[0077] The LAN connection between the interface board and the ECU is preferably established via a patch cable, whereby connections from two separately operated LAN networks can be carried on a single cable and in the respective sockets. Thus, a connection between two different local networks is possible via a single cable.

[0078] The housing assembly is preferably a trough-shaped enclosure with side walls. The side walls enclose the power module completely, preferably entirely. This provides a lateral seal for the housing assembly. An outlet for a charging cable can be provided in the side wall. A permanently attached charging cable can be connected via the charging port if an electrical charging socket is not desired. The charging cable outlet is preferably located in a recess in a side wall. The side wall can be recessed into the interior of the housing assembly, particularly in the area where a charging socket is located. If a permanently attached charging cable is used, an unwired charging socket can be provided in the housing assembly to function as a "plug garage."

[0079] The tub assembly preferably also has a base. In the assembled state, the base of the tub assembly rests against the protective housing cover of the docking station. Preferably, the base faces the protective housing cover of the docking station.

[0080] PW / PW 180680DE January 30, 2019 As previously explained, the HPS module can be configured as a printed circuit board. To ensure that the HPS module can be easily connected to the power connector on the docking station, it is mounted in a floating manner. This floating mounting allows the plug and socket of the power connector to be aligned during assembly by using guides to move the floating circuit board within the plane of the mounting.

[0081] Like the docking station, the charging unit also has a power connector. This is located on the HPS module. The power connector is preferably a connector corresponding to the power connector on the docking station. The power connectors correspond to each other according to the plug-and-socket principle, with the power connector on the HPS module preferably being a plug, whereas the power connector on the docking station is a socket.

[0082] The power connector is located in a recess in the base of the tub assembly. To prevent at least one contact of the power connector from being exposed during the assembly of the charging unit onto the docking station, when the power connectors are also being plugged in, it is proposed that the power connector of the HPS module be enclosed by a circumferential collar. The collar preferably completely surrounds the power connector and extends from the interior of the tub assembly through its base. The collar can be located on the base itself or on the circuit board of the HPS module. The collar preferably has a length approximately equal to the length of the longest contact of the power connector.The power connector is therefore only open at the bottom, enclosed laterally by the collar, and concealed at the top by the circuit board of the HPS module. This ensures sufficient protection against accidental contact for tool-free mounting of the charging unit onto the docking station.

[0083] PW / PW 180680DE January 30, 2019 Furthermore, the base of the tub assembly may have an opening in the area of ​​the charging socket. This opening may be a recess for receiving the charging socket. In particular, the opening allows the charging socket to be manually operated from below, i.e., from the base, especially for unlocking. In the event of a fault, a charging plug inserted into the charging socket may be locked. This lock is usually released by a powered emergency release. However, this release may be inoperative in the event of a power failure. Since it should be ensured, if possible, that the charging unit is de-energized for the emergency release, access from the base is recommended. Because the emergency release is then only possible from the base, it is necessary to remove the charging unit from the docking station.This process necessarily disconnects the electrical connection between the power connections of the docking station and the charging unit, ensuring that the charging unit is completely de-energized and that the mechanical emergency release can be carried out safely.

[0084] The charging unit should be as modular as possible to accommodate a wide variety of equipment options as needed. This also means that different charging sockets should be able to be received by the tub assembly. Therefore, a modular receptacle for the charging socket is proposed, which is preferably tool-free. For this purpose, a receptacle for a charging socket is provided in the tub assembly, the receptacle having fixing means for the detachable attachment of the charging socket to the tub assembly. The charging socket can be arranged in the tub assembly with corresponding fixing means. For this purpose, the charging socket can be arranged on a receiving body. The receiving body has a larger base area than any possible charging socket. The charging socket is preferably arranged centrally on a surface of the receiving body. The receiving body is designed to accommodate a wide variety of charging socket types.However, the fixing elements of the receiving body, which correspond to the fixing elements and form the interface, are identical in all different charging sockets. This is achieved by...

[0085] PW / PW 180680DE, dated January 30, 2019, ensures that the mounting body is dimensioned so that the interface remains unchanged even with modified charging sockets. This achieves modularity, as the charging unit can accommodate and operate a wide variety of charging socket types. The mounting bodies are designed to accept different charging sockets. These can be, in particular, Type 1, 2, or 3 sockets, as well as CCS according to IEC 62196 or CHAdeMO. Other types of charging sockets can also be arranged in the mounting body.

[0086] The fixing elements in the trough assembly are preferably formed by comb-shaped flanges with aligned openings. Corresponding fixing elements can be provided on the receiving body of the charging socket or the charging socket itself. Comb-shaped flanges can also be provided on the receiving body of the charging socket, which interact with and engage the flanges of the fixing elements. Pins can be inserted through the aligned openings of the flanges, allowing the receiving body or the charging socket to be positively locked to the fixing elements and thus to the trough assembly.

[0087] To secure the loading unit to the docking station, it is proposed that the hull assembly be equipped with bottom-mounted ribs extending away from the interior of the hull assembly. These ribs can be designed to engage with recesses on the docking station. By inserting the ribs into these recesses, they can be positively locked to the docking station.

[0088] For power monitoring, the HPS module can include at least one circuit breaker. Specifically, the power module can include a sensor for monitoring the neutral conductor as well as the earth conductor, and / or a residual current device (RCD), and / or a short-circuit protection device (SCD), and / or a welding detection sensor. All of these sensors can have switching functions or control a switch.

[0089] PW / PW 180680DE January 30, 2019 The first charging control circuit, a charging outlet, and the circuit breaker can be arranged on the power module's circuit board. The charging outlet is wired so that the charging socket can be connected to it via terminal blocks. The charging outlet provides contact points for phases L1, L2, L3, as well as neutral (PE) and earth (N). In addition, the charging outlet can have CP and PP connections, which may be located in a connector separate from the power terminals.

[0090] According to one embodiment, it is proposed that the first charging control circuit on the power module is configured for communication with an electric vehicle on a power conductor, in particular by means of pulse width modulation. The first charging control circuit enables communication according to DIN 61851. This charging control includes basic functionality to initially negotiate charging readiness with an electric vehicle.

[0091] As previously explained, the charging outlet serves to connect either a charging socket or a charging cable permanently attached to the tub assembly. The charging outlet is located within the tub assembly and is connected to a charging cable located on or extending from the tub assembly, or to a charging socket within the tub assembly. The charging outlet preferably comprises a terminal block with connections for the individual phases, a neutral conductor, and a protective conductor on one side, and a connector with at least two poles for accepting PP and CP connections on the other.

[0092] As previously explained, the tub assembly can be closed by the cover assembly, with the exception of the charging socket. The communication module and the user interface module can be housed in the cover assembly. When attaching the user interface module or the communication module...

[0093] PW / PW 180680DE January 30, 2019 In the cover assembly, the user interface module and then the communication module can be arranged starting from the cover surface. Thus, the user interface module is sandwiched between the cover surface and the communication module.

[0094] The communication module and the user interface module are preferably each mounted on their own circuit board. This increases the modularity of the charging unit, as both the communication module and the user interface module can be installed separately in the cover assembly. This allows either a communication module, a user interface module, or both modules to be arranged in the cover assembly as needed. Furthermore, temperature management is significantly optimized. If the power module is located at the bottom of the tub assembly and the communication module and / or the user interface module is in the cover assembly, the modules are spaced apart, thus optimizing temperature management within the tub assembly.

[0095] The lid assembly preferably corresponds completely to the tub assembly; in particular, the base surfaces of the lid assembly and tub assembly are such that the lid assembly rests completely on the tub assembly when assembled. For fixation, locking elements are provided on the side walls of the lid assembly, which can engage with the inner sides of the tub assembly. This allows the lid assembly to be connected to the tub assembly. The locking elements can be designed such that fixation occurs by engaging from behind. Furthermore, the locking elements can be designed such that they can only be released from the bottom, i.e., only when the tub assembly has been mechanically detached from the docking station.This increases safety, as the lid assembly always provides protection against contact and cannot be lifted off the tub assembly as long as the tub assembly is resting on the docking station at its base. Only when the tub assembly is lifted off the...

[0096] PW / PW 180680DE January 30, 2019 Once the docking station has been removed and the charging unit is therefore necessarily free of electrical voltage, the lid assembly can be detached from the tub assembly by releasing the locking elements.

[0097] According to one embodiment, it is proposed that the communication module and the user interface module are arranged in a first area of ​​the cover surface, and that a shutter is arranged on the cover surface in a second area, corresponding to the charging socket in the housing assembly. The shutter has a movable element that is slidable on the inside of the cover assembly. The shutter can be spring-loaded so that it is always in a closed position when unloaded. By manually sliding the shutter open, it can be moved parallel to the inner surface of the cover assembly, thus creating an opening that lies directly above the charging socket. This allows a charging plug to be inserted into the charging socket. After the charging plug is removed, the spring elements ensure that the shutter closes automatically.

[0098] According to one embodiment, it is proposed that the user interface module is attached to the inside of the lid surface.

[0099] In particular, the user interface module is permanently attached to the cover surface of the cover assembly. Signal transmitters and / or signal sensors can be arranged on the circuit board of the user interface module on the side facing the cover surface. Operating elements or displays can be provided on the outside of the cover surface. The mechanical fixation of the user interface module to the cover assembly ensures that the sensors and / or signal transmitters of the user interface module are aligned with the operating elements or displays located on the outside of the cover surface and that their relative positioning to each other is always correct.

[0100] The communication module and / or the user interface module are attached to the lid assembly. Attachment to the tub assembly is also possible.

[0101] PW / PW 180680DE January 30, 2019 exclusively indirectly via the attachment of the cover assembly to the tub assembly. Thus, the communication module and user interface module are mechanically connected to the power module only indirectly via the connection between the cover assembly and the tub assembly.

[0102] An electrical connection between the communication module and / or user interface module and the power module is made via at least one flexible cable.

[0103] The communication module features a second charging control circuit. This second charging control circuit is used to communicate with an electric vehicle via a pilot conductor. For this purpose, the second charging control circuit can access at least the pilot conductor of the charging outlet. Specifically, the second charging control circuit operates according to DIN 15118. Other higher-level protocols are also possible. The second charging control circuit is connected to the first charging control circuit in such a way that the second charging control circuit can override the first. Parallel operation is also possible, allowing communication via both the first and second charging control circuits simultaneously, with the first charging control circuit then being synchronized with the second.

[0104] According to one embodiment, it is proposed that the communication module includes an encryption module. The encryption module is specifically designed as a TPM module. The encryption module can be used to encrypt measured values ​​from the measuring device installed in the docking station. For this purpose, a connection can be established between a measured value output of the measuring device in the docking station and the encryption module via a suitable patch cable. The encryption module can encrypt the measured values ​​from the measuring device (smart meter, iMS).

[0105] PW / PW 180680DE January 30, 2019 and receive measurement data and, if necessary, transmit it to a billing center via a wide area network.

[0106] The subject matter is explained in more detail below with reference to a drawing showing an exemplary embodiment. The drawing shows:

[0107] Fig. 1 shows a schematic view of a charging station;

[0108] Fig. 2 shows an exploded view of a charging station with docking station and charging unit;

[0109] Fig. 3 shows a view of an open docking station;

[0110] Fig. 4 shows a view of a closed docking station;

[0111] Fig. 5 shows an exploded view of a tub assembly;

[0112] Fig. 6 shows a tub assembly in a partially assembled state;

[0113] Fig. 7 shows a tub assembly from below;

[0114] Fig. 8a-c assembled tub assemblies without lid;

[0115] Fig. 9 shows a view of a cover assembly;

[0116] Fig. 10 shows a bottom view of a cover assembly;

[0117] Fig. 11 shows a sectional view of a cover assembly.

[0118] Fig. 1 shows a charging station with a charging column 2, in which a receptacle 2a is provided. The receptacle 2a of the charging column 2 is designed to receive a docking station.

[0119] PW / PW 180680DE January 30, 2019 Station 4 and a charging unit 6 are provided. The docking station 4 can be fixed in the receptacle 2a in a manner not described in detail below. An electrical connection to a power supply network can be introduced into the docking station 4 via the charging column 2. The charging unit 6 can be assembled as a module with a tub assembly and a cover assembly, which are described in more detail below, and placed on the docking station 4 and mechanically fixed to the docking station 4.

[0120] Along with the mechanical fixing, the charging unit can be electrically connected to the docking station 4 via a plug / socket. Communication can be established via at least one patch cable between the docking station 4 and the charging unit 6.

[0121] When installed, the docking station 4 is completely enclosed in the recess 2a, and the charging unit 6 essentially completely surrounds the outer edge of the docking station 4 and is also at least partially recessed in the recess 2 with its side edges.

[0122] However, if required, the docking station 4 can also be mounted directly on a wall without the need for the charging column 2 with the mount 2a. Even then, the side walls of the docking station are at least partially enclosed by the side walls of the charging unit 6.

[0123] As can be seen in Fig. 1, the base areas of Docking Station 4 and Charging Unit 6 are approximately congruent to each other, so that when viewed from the front in the assembled state, the Charging Unit 6 completely covers the Docking Station 4.

[0124] The modular design of docking station 4 and charging unit 6 is shown in more detail in Fig. 2.

[0125] PW / PW 180680DE January 30, 2019 Figure 2 shows the docking station 4, which has a cable entry 8 in a side wall 10. The docking station 4 is at least partially closed on the side facing the charging unit 6 by a protective housing cover 12. The cover 12 has recesses 14a and 14b, which are described in more detail below.

[0126] The loading unit 6 can be formed from a tub assembly 20 and a lid assembly 26.

[0127] Openings 16 can be provided between the lid 12 and the side wall 10. Through these openings 16, webs 18 of the tub assembly 20 can be inserted into the docking station 4, so that the tub assembly 20 can be fixed to the docking station 4 via the webs 18.

[0128] As previously explained, the tub assembly 20 can be coupled with the docking station 4. The tub assembly 20 is part of the charging unit 6, which also includes the cover assembly 26. The tub assembly 20 accommodates a power module 22 and a charging socket 24. The tub assembly 20 is essentially closed at the bottom by a base and is closed at the top by the cover assembly 26.

[0129] The lid assembly 26 can be fixed to locking elements 30 in the side walls of the tub assembly 20 via locking elements 28. The lid assembly 26 can include a shutter 32 and operating elements, such as a display 34.

[0130] In its assembled state, the cover assembly 26 is mechanically joined to the trough assembly 20, thus sealing the trough assembly 20 on one side. On the bottom side, the trough assembly 20 is joined to the docking station 4, and the side walls 10 provide a seal between the docking station 4 and the trough assembly 20.

[0131] PW / PW 180680DE January 30, 2019 A seal is formed between the cover assembly 26 and the tub assembly 20 along the outer edge facing the cover assembly 26. The docking station 4 serves as a connection point and can be connected to a power supply network independently of the charging unit 6. As long as the charging unit 6 is not connected to the docking station 4, it is de-energized. Connecting the charging unit 6 to the docking station 4 connects it to the power supply network. The charging unit 6 can be understood as a supply level, which includes charging technology and other "intelligence." This modular design allows the docking station 4 to be installed first by a qualified technician without the need to immediately install a charging unit 6.

[0132] The charging unit 6 can be easily connected to the docking station 4 at any later time, even by someone without technical expertise, without the need for tools. This automatically electrifies the charging unit 6. As previously explained, the charging unit 6, with its special design consisting of the tub assembly 20 and the cover assembly 26, is particularly flexible and modular, allowing it to be adapted to the specific application.

[0133] The docking station 4 is shown in more detail in Fig. 3. The docking station 4 has a base and side walls 32. A mains board 34 and an interface board 36 are arranged on the base of the docking station 4. A terminal block 38 for connecting a power supply cable is provided on the mains board 34.

[0134] Scale markings (40) may be provided on the side walls (32) and / or the floor.

[0135] In addition to the connector strip 38, a power connector 42 is also arranged as a socket on the main board 34.

[0136] PW / PW 180680DE January 30, 2019 Furthermore, a receptacle 44 is provided between the side walls 32. The receptacle 44 can be closed with a cover. A measuring device, e.g., a smart meter or an iMS, can be snapped into place in the receptacle 44. Cable entry points through the side walls of the receptacle 44 for wiring the measuring device are not shown. The receptacle 44 can be sealed via suitable bores, which is not shown in detail.

[0137] Interface board 36 has connectors 46 and 48 for a network cable, as well as for a CAN bus and / or a GPIO bus. In addition, it may have connectors for connecting to the modules within the charging unit.

[0138] External wiring to a local area network (LAN) is achieved via a terminal block, which can then be accessed via an RJ45 socket. Sufficient contacts are provided here to connect at least two independent LANs. For example, a first LAN can be established with a central unit, and a second LAN can be established between master and slave units—that is, between a charging unit with a master controller and at least one, preferably several, charging units, each with only one slave controller. Both LANs can be connected to the charging unit 6, or the modules located within it, via a single patch cable.

[0139] To install Docking Station 4, it is first mechanically fixed either in the mounting bracket 2 or, for example, screwed to a wall. A multi-core power cable is then inserted into the interior of Docking Station 4 through cable entry 8. This cable has a particularly large cross-section and a rigid core. Therefore, the cables are difficult to handle. To ensure that the cables are always cut to the correct length, the installer can place the cable against scale 40 and cut it directly to length.

[0140] PW / PW 180680DE 30 January 2019, the technician can correctly assemble the connection cable so that he can then connect it to terminal block 38 without any problems.

[0141] Depending on the configuration, a measuring device can be installed in the mounting 44. This measuring device is wired from the terminal block 38 via flexible cables. From the measuring device, another connection is made via flexible cables to a power connection 42. If no measuring device is installed, a direct connection is made via a flexible cable between the terminal block 38 and the power connection 42. A terminal block for the respective cables is also provided at the power connection 42.

[0142] A network cable can also be inserted into the housing of the docking station 4 via the cable entry 8 and connected to the ports 48.

[0143] After the electrical wiring has been carried out, the housing of the docking station 4 is closed by a cover 12 as shown in Fig. 4.

[0144] Figure 4 shows that the cover 12, in addition to the recess 14a for the power connector 42, has at least one further recess 14b for the communication connections of the interface board 36, in particular an RJ45 connector, a GPIO connector and a CAN bus connector. An RJ45 connector can establish a connection to two separate LAN networks via the RJ45 socket 46.

[0145] Openings 16 are provided on the side edges of the protective housing cover 12. The openings 16 are located between the cover 12 and the side wall 10 of the docking station 4. The webs 18 of the basin assembly 20 can be inserted into the docking station 4 through the openings 16, so that these webs 18 are completely enclosed by the side wall 10 of the docking station 4. Thus,

[0146] PW / PW 180680DE 30 January 2019 the charging unit 6 is mechanically anchored by the tub assembly 20 within the docking station 4.

[0147] After the docking station 4 has been installed in the manner shown, it can initially remain unequipped, protected by the protective housing cover 12, and at any later time be equipped with a charging unit 6 comprising a tub assembly 20 and a cover assembly 26.

[0148] A tub assembly 20 is shown in one configuration variant in Fig. 5. The tub assembly 20 has a housing with side walls 20a and a base 20b. A power module 50 can be mechanically anchored to the bottom of the tub assembly 20 in the area of ​​the side walls 20a and the base 20b, respectively. The power module 50 has a charging port 52 and a charging control circuit 54. On the underside of the power module, as also shown in Fig. 5, a connector 56 is arranged, which corresponds to the socket of the power connection 42. A collar 58 surrounds the connector 56. The collar 58 extends away from the surface of the circuit board of the power module 50. In particular, the collar 58 has an extension in this direction that is greater than the longest extension of each contact of the connector 56.

[0149] The power module 50 is equipped with additional components for power monitoring and / or power control. Furthermore, a connection 60 for a communication bus is located on the power module 50.

[0150] The communication bus connector 60 allows the communication bus to be connected to the power module 50. The communication bus can accommodate both a communication module and a user interface module, which will be described below, in a plug-and-play manner and connect them to the power module 50. This allows the power module 50 to be configured modularly using the communication module and / or the user interface module.

[0151] PW / PW 180680DE 30 January 2019 supplement to allow the charging unit 6 to be adapted to the respective requirements as needed.

[0152] The power module 50 is arranged in a first area of ​​the base 20b. In a second area of ​​the base 20b, a fixing element 62 is provided, which is formed from comb-like flanges arranged relative to each other with aligned openings. The fixing element 62 is formed from two opposing comb-like structures that frame an opening 64 in the base 20b. The fixing elements 62 correspond to fixing elements 66 of a receiving body 68 for a charging socket 70. The charging socket 70 is arranged directly above the opening 64 in the assembled state. Through the opening 64, it is possible to perform a manual emergency release of the charging socket 70 from the underside of the tub assembly 20, through the base 20b.

[0153] To mount the mounting body 68 to the tub assembly 20, the mounting body 68 with its fixing means 66 is aligned with the fixing means 62 so that pins 72 can be pushed through the mutually aligned openings. The pins 72 thereby fix the receiving body 68 to the housing of the tub assembly 20.

[0154] In a partially assembled state, the power module 50 is inserted into the base of the tray assembly 20, as shown in Fig. 6. The connector 56, including its collar 58, is inserted through the opening 74 on the base. The power module 50 is mechanically locked to the housing of the tray assembly 20 and can be suspended within it. Alternatively, or commutatively, the mains board 34 can be suspended within the housing of the docking station 4. This suspended mounting has the advantage that, when the tray assembly 20 is mounted onto the docking station 4, the connector 56 can automatically align itself with the socket of the power connector 42. This improves usability, particularly simplifying assembly by a layperson.

[0155] PW / PW 180680DE January 30, 2019 The underside of the tub assembly 20 is shown in Fig. 7. It can be seen that the webs 18 protrude from the tub assembly 20, pointing away from the base 20b. Furthermore, the collar 58 with the connector 56 can be seen protruding through the opening 74.

[0156] In its assembled state, the collar 58 engages with the opening 14a. As can be seen in Fig. 4, an annular gap 74 is formed in the opening 14a between the socket of the power connector 42 and a collar 78 projecting into the interior of the docking station 4 housing. The collar 78 provides touch protection for the docking station 4.

[0157] During assembly, the tub assembly 20 is placed onto the docking station 4, and as can be seen from the combination of Figures 4 and 7, the collar 58 slides into the annular gap 76. The collar 58 enters the annular gap 76 before a contact of the plug 56 makes electrical contact with a contact of the socket of the power connector 42. This prevents an electric shock from occurring during the assembly of the tub assembly 20 onto the docking station 4.

[0158] The receiving body 68 is designed to accommodate a wide variety of charging sockets 70, or in other words, a wide variety of charging sockets 70 can be equipped with different receiving bodies 68, with the fixing means 66 being equidistant from each other and thus forming a uniform mechanical interface to the fixing means 62. This allows a wide variety of charging sockets 70 to be installed in one and the same tub assembly 20, as shown in Figures 8a-c.

[0159] It can be seen there that the fixing elements 62, 64 interlock and are mechanically locked together via the pins 72. Fig. 8a shows a receiving body 68 with a CCS charging socket 70, Fig. 8b shows a receiving body 68 with a

[0160] PW / PW 180680DE 30 January 2019Chademo charging socket 70 and Fig. 8c shows a receiving body 68 with a Type 2 charging socket 70.

[0161] As can be seen in Figs. 8a-c, the receiving body 68 makes it possible to accommodate a wide variety of charging sockets 70 without having to make any structural changes to the housing of the tub assembly 20.

[0162] The charging sockets 70 do not necessarily have to be electrically connected to the charging port 52, but can also remain potential-free. In this case, the charging sockets 70 can serve as a "plug garage". The charging outlet 52 can be electrically connected to a charging cable permanently attached to the housing of the tub assembly 20. The charging cable can exit in the area of ​​a recess 80 in the side wall of the tub assembly 20.

[0163] If a permanently attached cable is not used, the charging socket 70 can be electrically connected to the charging control circuit 54 via the charging port 52. The charging port 52 has three terminals, one for each phase, on a terminal strip, another terminal strip with two terminals for the neutral conductor and the protective conductor, and optionally a terminal socket for a Plug Present (PP) contact and a Pilot Conductor (CP) contact.

[0164] To install the charging socket 70, the receiving body 68 is positioned on the tub assembly 20, the charging socket 70 is connected to the respective connections of the charging outlet 52 via pre-assembled cables, and then the receiving body 68 is fixed in the tub assembly 20 via the pins 72.

[0165] The loading unit 6 comprises, in addition to the tub assembly 20, the lid assembly 26, as shown in Fig. 9. The top surface of the lid assembly 26 can have various operating elements 82 and / or a shutter 84 on its upper surface. On the side of the lid assembly 26, on whose

[0166] PW / PW 180680DE January 30, 2019 Locking elements 86 can be provided on the side edges, which can engage with the inner side walls of the tub assembly 20. This allows the cover assembly 26 to be mounted on the tub assembly 20.

[0167] The locking elements 86 can be designed to engage with the side walls of the tub assembly 20 and, in particular, can only be released non-destructively from the underside, starting from the base 20b of the tub assembly 20. This prevents the cover assembly 26 from being detached from the tub assembly 20 while the tub assembly 20 is still electrically connected to the mains board 34 of the docking station 4.

[0168] On the rear side of the cover assembly 26, as shown in Fig. 10, the shutter 84 is mounted so that it can be moved in a direction 88 to release the charging port 70. As can be seen in Fig. 11, the shutter 84 is spring-loaded by a spring 98, so that it automatically moves into the closed position shown.

[0169] In another area of ​​the cover assembly 26, a communication module 90 and a user interface module 92 can be arranged. Both the communication module 90 and the user interface module 92 can be mechanically fixed to the cover assembly 26 or its housing.

[0170] The communication module 90 is connected to the power module 50 and the user interface module 92 via the communication bus.

[0171] The communication module 90 includes a charging control circuit (not shown in detail) which has electrical access to the charging port 52. The charging control circuit can override the charging control circuit 54 or at least be coupled to it, so that the two charging control circuits can coordinate the control of a charging process.

[0172] PW / PW 180680DE January 30, 2019. Figure 11 shows the arrangement of the communication module 90 and the user interface module 92 in the cover assembly 26. The user interface module 92 faces the inside of the cover wall and is mechanically connected to the housing of the cover assembly 26 via click connections 94. The communication module 90 is also connected to the housing of the cover assembly 26 via connections not shown.

[0173] The user interface module 92 is fixed to the inside of the cover assembly 26, thus ensuring precise positioning of sensors and signal transmitters on the user interface module 92 relative to the top of the cover assembly 26. In particular, a display 96 can be optionally arranged in the cover assembly 26 and controlled via the user interface module 92 and / or the communication module 90.

[0174] PW / PW 180680DE January 30, 2019 Reference List

[0175] 2 charging stations

[0176] 2a Recording

[0177] 4 Docking Station

[0178] 6 charging units

[0179] 8 Cable entry

[0180] 10 side wall

[0181] 12 lids

[0182] 14 Exclusion

[0183] 16 Opening

[0184] 18 Bridge

[0185] 20 Bathtub assembly

[0186] 22 Power module

[0187] 24 charging sockets

[0188] 26 Cover assembly

[0189] 28, 30 locking elements

[0190] 32 side walls

[0191] 34 Mains-Board

[0192] 36 Interface board

[0193] 38 connection strip

[0194] 40 scale

[0195] 42 Power connection

[0196] 44 recording

[0197] 46 Connection socket

[0198] 48 connections

[0199] 50 Power module

[0200] 52 charging ports

[0201] 54 Charging control circuit

[0202] 56 plugs

[0203] 58 collars

[0204] PW / PW 180680DE January 30, 2019 60 Connection

[0205] 62 Fixatives

[0206] 64 Opening

[0207] 66 Fixatives

[0208] 68 recording bodies

[0209] 70 charging socket

[0210] 72 pens

[0211] 74 Opening

[0212] 76 Annular gap

[0213] 78 collars

[0214] 80 rebound

[0215] 82 Control element

[0216] 84 Shutter

[0217] 86 locking element

[0218] 88 direction

[0219] 90 Communication module

[0220] 92 User Interface Module

[0221] 94-click connection

[0222] 96 Display

[0223] PW / PW 180680DE 30. Januar 2019

Claims

PW / PW 180680DE January 30, 2019 patent claims 1. Charging unit for electric vehicles, including a power module a communication module and a user interface module, whereby the power module has a first charging control circuit for charging with an electric vehicle characterized by that a communication bus connects the communication module and the user interface module to the power module.

2. Charging unit according to claim 1, characterized by that the communication module and the user interface module can optionally be connected to the power module via the communication bus, whereby the function of the first charging control circuit of the power module is at least partially independent of this.

3. Charging unit according to one of the preceding claims, characterized by that the communication bus connects the communication module and the user interface module to the power module in a plug-and-play manner.

4. Charging unit according to one of the preceding claims, characterized by the fact that the power module, the communication module and the user interface module are each implemented on a separate circuit board. Charging unit according to one of the preceding claims, characterized by that the first charging control circuit is set up independently of the communication module and / or the user interface module for charging control with an electric vehicle. Charging unit according to one of the preceding claims, characterized by that the first charging control circuit is set up for charging control by means of pulse width modulation and / or that the first charging control circuit is set up for charging control via an energy conductor, in particular that the first charging control circuit is set up for charging control according to DIN61851. Charging unit according to one of the preceding claims, characterized by that the communication module has a second charging control circuit for charging control with an electric vehicle. Charging unit according to one of the preceding claims, characterized by that the second charging control circuit is set up for charging control with an extended range of functions compared to the first charging control circuit, in particular that the second charging control circuit is set up for charging control via a pilot conductor with an electric vehicle, in particular is set up according to DIN 15118, CCS or Chademo, PW / PW 180680DE January 30, 2019 Charging unit according to one of the preceding claims, characterized by that the power module has a charging outlet, wherein the charging outlet has, in addition to the connections for phase, neutral and earth conductors, a connection for a plug present contact and a pilot conductor contact. Charging unit according to one of the preceding claims, characterized by that the charging outlet connections are at least partially connected to the second charging control circuit. Charging unit according to one of the preceding claims, characterized by that the first charging control circuit and the second charging control circuit are interconnected in such a way that the second charging control circuit at least partially overcontrols the first charging control circuit. Charging unit according to claim 1, characterized by that the power module has components for power monitoring during a charging process, in particular at least one circuit breaker, at least one fuse, at least one residual current device, at least one GFCI sensor, at least one welding detection sensor, at least one temperature sensor, at least one switching relay and / or a control for an electrical plug release. Charging unit according to one of the preceding claims, characterized by the communication module has components for wireless communication in a local area network and / or a wide area network and / or that PW / PW 180680DE 30 January 2019 the communication module has at least an encryption circuit, at least a master controller or a slave controller, at least a display interface, at least a touch display interface and / or a control processor. Charging unit according to one of the preceding claims, characterized by that when equipped with a master controller, an interface to a slave controller is arranged on the communication module and that the master controller forwards at least the measured values ​​received via the interface to the encryption circuit. Charging unit according to one of the preceding claims, characterized by that the user interface module has at least one near-field antenna, at least one radar sensor, at least one capacitive proximity sensor, at least one display interface, at least one display, at least one touch display and / or at least one brightness sensor. Charging unit according to one of the preceding claims, characterized by that the touch display is controlled via a touch display interface on the communication module and / or that a display is controlled via a display interface on the communication module. Charging unit according to one of the preceding claims, characterized by that the power module is arranged in a tub assembly and that the communication module and / or the user interface module is arranged in a cover assembly. PW / PW 180680DE 30 January 2019 System with at least two charging stations, each with a charging control circuit according to one of the preceding claims, characterized by that a first charging station is set up with a communication module with a master controller, that a second charging station is set up with a communication module with a slave controller, and that the slave controller transmits at least measured values ​​from an energy meter to the master controller. PW / PW 180680DE January 30, 2019

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