DE102022104051B3 - Wall charging station and system of charging socket and such - Google Patents

Abstract

The present invention relates to a wall charging station (10) for charging an electric vehicle, comprising a charging current connection (16) and an emergency stop device (18) which is designed and set up to switch the charging current connection (16) when the emergency stop device (18) is in a activated state. The emergency stop device (18) has a lock interface (20) which is designed and set up to put the emergency stop device (18) into an activated state when a key means (100) is engaged. The present invention further relates to a system consisting of such a wall charging station (10) and a charging plug (200)

Description

technical field

The present invention relates to a wall charging station and a system comprising such a wall charging station and a charging plug.

State of the art

The proportion of purely electric vehicles and electric hybrid vehicles, referred to below as "electric vehicles" for the sake of simplicity, is growing continuously. The need to recharge vehicle batteries for storing electrical energy, for example in the form of rechargeable traction batteries of such an electric vehicle or electric hybrid vehicle, is also growing accordingly. This is realized, among other things, with wall charging stations, also known as wall boxes. Wall charging stations of this type are installed in public parking lots, for example. Alternatively, wall charging stations can also be found in private customer areas, where they can be mounted on the wall in carports or garages.

Depending on the type of motor vehicle, the actual charging process is initiated by plugging a charging plug into a charging socket or charging socket of the vehicle, whereupon, for example, the charging process is started immediately.

During the charging process, the charging current connection may have to be switched for a variety of reasons. For example, the case can arise that a charging error occurs on the vehicle and/or on the wall charging station and the charging current connection has to be electrically interrupted. Nevertheless, it can happen that the charging current connection has to be manually decoupled from the electric vehicle due to an external circumstance.

However, depending on the use and application of the wall charging station, it may be necessary to prevent any form of such unplanned, manual measures as far as possible, for example to prevent such manual intervention being used for abusive or simply improper handling of the wall charging station.

Different approaches to solving this are known from the prior art. From the DE 10 2020 108 950 A1 For example, an emergency release device on the vehicle is known, which is released for activation by means of a wireless device such as a vehicle key or smartphone. The disadvantage here is that no indirect barrier is provided on the wall charging station that would guarantee the operator of the wall charging station safe and proper handling of the wall charging station.

Out of CN 1 13 561 830 A an emergency stop device with an intelligent lock for a cover is known, wherein the lock can be switched using data processing. When open, the cover allows access to an emergency stop button. Also from the CN 2 11 792 473 U a cover is known which surrounds an emergency stop button and which can be locked by means of a padlock.

From the DE 10 2012 211 295 A1 a DC charging device for a battery of a vehicle is known, which includes an emergency stop device. The DE 10 2019 112 083 A1 discloses a charging station for charging an electric vehicle, wherein a detection element for an arc fault and a switching element for short-circuiting a pilot conductor are provided. In the DE 299 10 338 U1 discloses a DC charging device for a battery of a vehicle, which allows an emergency stop button to be switched on again only under a specific control.

The DE 10 2011 016 979 A1 discloses an actuator for a lift truck, wherein removal of the actuator causes an emergency stop switch to switch.

Presentation of the invention

Proceeding from the known prior art, it is an object of the present invention to provide an improved wall charging station for charging an electric vehicle.

The object is achieved by a wall charging station for charging an electric vehicle with the features of claim 1. Advantageous developments result from the dependent claims, the description and the figures.

Accordingly, a wall charging station for charging an electric vehicle is proposed, comprising a charging current connection and an emergency stop device which is designed and set up to switch the charging current connection in an activated state. In this case, the emergency stop device has a lock interface which is designed and set up to bring the emergency stop device into an activated state upon physical intervention with a complementary key means which is not part of the wall charging station and can be brought into engagement with the lock interface.

The wall charging station initially serves as an interface between the mains power provided by the respective energy supplier, which is fed into the wall charging station. The electric vehicle is ultimately charged via the charging current connection. Within the meaning of the present disclosure, the charging current connection can include all electrical components that are required for conducting electrical energy from a mains current connection to the charging socket of the electric vehicle.

For the purposes of the present disclosure, charging current can be delivered exclusively via the charging current connection. For the purposes of the present disclosure, switching the charging current connection via the emergency stop device is generally to be understood as meaning that the charging current is interrupted directly as a result and/or that the charging current can be interrupted as a result.

Within the meaning of the present disclosure, the terms key means and key interface are to be understood as meaning a key-lock pair, but without being restricted to the literal meaning. Accordingly, the term tampering is understood to mean a condition in which there is a physical tampering of a key means with a lock interface.

Because the emergency stop device has a lock interface that is designed and set up to put the emergency stop device in an activated state when a key is engaged, an indirect barrier can be provided on the wall charging station that provides the operator of the wall charging station with a safe and Proper handling of the wall charging station is guaranteed. In particular, this can prevent the emergency stop device from being actuated arbitrarily or negligently to end the charging process. In addition to these advantages, this also opens up the possibility of putting the wall charging station according to the present disclosure into an activated state only by an authorized person. This can ensure that incorrect operation, carelessness or vandalism in connection with operating the wall charging station does not automatically lead to activation of the emergency stop device.

The emergency stop device can be designed and set up to de-energize the charging current connection in the activated state. By de-energizing is meant to interrupt the flow of current between a mains power connection and an output of the charging power connection. If the charging current connection is switched off, no electrical energy can be drawn from the wall charging station.

The emergency stop device can preferably have a CP breaker for the controlled interruption of the electrical connection. This has the advantage that the electrical connection is interrupted simply, safely and clearly when the emergency stop device is in the activated state and thereby switches the charging current connection.

The CP breaker can preferably be electrically connected to the charging current connection by means of a direct circuit. This allows the CP breaker to be easily, clearly and safely integrated into the circuit of the charging current connection.

According to a further embodiment, the wall charging station can further comprise a lockable charging socket arranged on the charging current connection, the emergency stop device being designed and set up to switch the charging socket from a locked state to an unlocked state in the activated state.

If, for example, a malfunction or an emergency situation occurs at the wall charging station, it can happen that the charging socket is in a locked state and has to be switched from this to an unlocked state. Because the emergency stop device is designed and set up to switch the charging socket from a locked state to an unlocked state in the activated state, this can be done by engaging the lock interface with a key means. For example, this can be done by an authorized person who has access to a suitable key means.

According to an advantageous development, the lock interface can have a lock and/or an electrical connection socket. According to the present disclosure, in both cases it is necessary to engage the key means with a key means complementary to the lock interface.

Using a lock as a lock interface can provide a simple, secure, and indirect barrier that must be overcome to bring the emergency stop device into an activated state. By using an electrical connection socket, a flexibly changeable, safe and indirect barrier can be provided, which must be overcome in order to activate the emergency stop device to set an activated state and thereby to switch the charging current connection.

According to an advantageous development, the emergency stop device also has a flap surrounding the lock interface. As a result, an indirect barrier can be created between the emergency stop device and an operator of the wall charging station. This has the advantage that improper activation of the emergency stop device can be avoided. The flap can be attached to a housing of the wall charging station, for example.

According to an advantageous development, the flap is designed and set up in such a way that opening of the flap is irreversible. The term irreversible is to be understood as meaning that the flap cannot be closed again in its original state after it has been opened once or for the first time. This has the advantage that it can be recognized simply and clearly when the flap has been opened once. As a result, future users of the wall charging station can quickly see that the wall charging station has apparently been triggered in an emergency and that it may not be possible or safe to operate the wall charging station at the moment.

In a further development, the flap can be designed in such a way that opening the flap leads to at least partial destruction of the flap. As a result of the at least partial destruction of the flap, after it has been opened once it is irreversibly changed to the extent of the at least partial destruction, as a result of which it can be easily and clearly recognized that the flap has already been opened once. This can prevent the wall charging station from being put back into operation immediately after a malfunction of the wall charging station, which led to the activation of the emergency stop device. In other words, it can be visually signaled that the wall charging station needs to be overhauled or replaced and that it may not be possible or safe to operate the wall charging station at the moment.

The flap and/or the emergency stop device can advantageously be designed in such a way that the flap can be exchanged or replaced. For example, this can be done by a suitable holder or mounting of the flap, in particular by a suitable hinge or a hinge connection. The advantage here is that a previously irreversibly opened flap can be easily replaced in this way and the wall charging station can be used again with a closed, functional flap after the flap has been replaced and, if necessary, after a malfunction has been rectified that may have led to the activation of the emergency stop device can be put into operation. Consequently, in this case, the closed flap is the exchanged or replaced flap. By exchanging or replacing only the flap, waste production can be avoided.

According to an advantageous development, the emergency stop device can also include a seal that is arranged on the flap in such a way that opening the flap inevitably leads to the destruction of the seal. This has the advantage that the destroyed seal can be used to identify easily and clearly when the flap has been opened. The broken seal indicates that the wall charging station needs to be inspected or replaced and that it may not be possible or safe to operate the wall charging station at the moment. Furthermore, this has the advantage that not the entire flap but only the seal has to be replaced in order to put the wall charging station into operation again with a closed flap, if necessary after eliminating a malfunction that may have led to the activation of the emergency stop device. As a result, costs and waste production can be further reduced.

According to an advantageous development, the emergency stop device also has an illuminated display for displaying an electrical voltage situation on the emergency stop device. As a result, a signal can be provided in a simple, unambiguous and reliable manner that provides information about the electrical voltage situation regardless of the weather or time of day. For example, this can be information about an electrical voltage situation as it is currently present in the charging current connection.

The light display advantageously has one or more LEDs for displaying one or different electrical voltage situations on the emergency stop device. For example, this can be information about an electrical voltage situation as it is currently present at the charging current connection. This can improve the user-friendliness of the wall charging station. Instead of the voltage, any other variable can also be used that allows a statement to be made about the relevant voltage situation on the emergency stop device or the charging current connection.

According to an advantageous development, the indicator light can be designed and set up to indicate the absence of voltage in the charging current connection and/or to indicate that the charging socket has been unlocked and/or locked. For example, an LED can be used to indicate whether or not a voltage is present at the charging current connection. Alternatively or additionally Several LEDs indicate whether or not a voltage is present at the charging current connection. Alternatively or additionally, LEDs can indicate whether the emergency stop device has been activated or deactivated. In particular, the light display can have a number of LEDs, each of which has different color tones. As a result, it can be visually recognized, for example, that the emergency stop device has been activated successfully. Ultimately, this further improves the safety and user-friendliness of the wall charging station. Specifically, on the one hand this can be used to warn that a voltage is still present at the charging current connection. Alternatively or additionally, it can be signaled that there is no voltage present. The light displays are advantageously designed in such a way that each voltage situation is associated with a lit LED. Instead of LEDs, HMI lamps can also be used.

According to an advantageous development, the wall charging station also has a key that is designed and set up to be brought into engagement with the lock interface. As a result, a suitable key means can be provided, with which activation of the emergency stop device can be successfully initiated.

According to an embodiment of the present disclosure, the lock interface includes a lock, and the key means includes a key. As a result, a key-lock pair can be formed in a simple and cost-effective manner, with which activation of the emergency stop device can be successfully initiated when the key engages with the lock.

According to a further embodiment of the present disclosure, the lock interface has an electrical connection socket, wherein the key means has a computer hardware with an electrical connection complementary to the connection socket. For the purposes of the present disclosure, computer hardware can be understood to mean an electronic tool such as a dongle or a USB storage medium. Because the lock interface has an electrical connection socket and the key means has computer hardware with an electrical connection complementary to the connection socket, a counterfeit-proof and adjustable or changeable key-lock pair can be provided, which activates when the computer hardware engages with the electrical connection socket the emergency stop device can be successfully initiated.

According to an advantageous development, the key means also has an executable computer program product that is designed and set up to put the emergency stop device into an activated state when the key means engages with the lock interface, as a result of which the charging current connection is switched. Because the key means also has a computer program product, software can be used to influence the functioning of the key means. For example, the computer program product can be set in such a way that it only activates the emergency stop device under certain conditions. In this case, the term intervention is to be understood in such a way that, in addition to the physical intervention of the computer program product in the electrical connection socket, the programmatically provided conditions must also be met.

According to an advantageous development, the computer hardware has a display that shows that the emergency stop device has been activated successfully. This makes it possible to determine, for example, that there is no voltage at the charging connection. Alternatively or additionally, it can be established that the charging socket has been unlocked. This means that, for example, there is no need for a light bulb on the wall charging station, which can further reduce the costs and the need for maintenance of the wall charging station.

Furthermore, the object of the present invention is achieved with a system made up of a wall charging station according to the present disclosure and a charging plug.

Accordingly, a system consisting of a wall charging station according to the present disclosure and a charging plug is proposed, the wall charging station having a lockable charging socket which is arranged on the charging current connection and in which the charging plug can be received in a lockable manner, the emergency stop device being designed and set up for this purpose, the charging socket in the activated state mechanically unlocked and / or electrically decoupled.

In principle, different variants are conceivable for this.

According to a first variant of this system, the emergency stop device can be designed in such a way that, in the activated state, it merely de-energizes the charging current connection. This can be done along the entire length of the charging current connection, for example also in the charging socket. This allows for simple, clear and a charging process can be electrically interrupted in a safe way.

According to a further variant of this system, the emergency stop device can be designed such that, when activated, it switches the charging socket from a locked state to an unlocked state, as a result of which a charging plug previously locked in the charging socket is mechanically unlocked and can be removed. As a result, a charging process can be mechanically interrupted by removing the charging plug in a simple, clear and safe manner.

According to a further variant of this system, the emergency stop device can be designed in such a way that, in the activated state, it both de-energizes the charging current connection and also switches the charging socket from a locked state to an unlocked state. This allows the charging process to be interrupted both electrically and mechanically in a simple, clear and safe manner.

character list

• 1 eine perspektivische Ansicht einer Wandladestation gemäß einem ersten Ausführungsbeispiel;
• 2 eine perspektivische Ansicht einer Wandladestation gemäß einem zweiten Ausführungsbeispiel; und
• 3 eine perspektivische Ansicht eines Systems aus einer Wandladestation und einem Ladestecker.

Preferred further embodiments of the invention are explained in more detail by the following description of the figures. show:

• 1 a perspective view of a wall charging station according to a first embodiment;
• 2 a perspective view of a wall charging station according to a second embodiment; and
• 3 a perspective view of a system of a wall charging station and a charging connector.

Detailed description of preferred embodiments

Preferred exemplary embodiments are described below with reference to the figures. Elements that are the same, similar or have the same effect are provided with identical reference symbols in the different figures, and a repeated description of these elements is sometimes dispensed with in order to avoid redundancies.

In 1 is shown schematically a perspective view of a wall charging station 10 according to a first embodiment.

The wall charging station 10 is designed for charging an electric vehicle and includes a housing 12, a charging current connection 16 and an emergency stop device 18. The charging current connection 16 is in the in 1 example shown on a front cover 14 is formed.

The emergency stop device 18 is designed and set up to switch the charging current connection 16 when the emergency stop device is in an activated state. The emergency stop device 18 has a lock interface 20 which is designed and set up to put the emergency stop device 18 into an activated state and thus switch off the charging current connection 16 when a key means 100 is engaged.

According to the 1 In the exemplary embodiment shown, the charging current connection 16 can have a lockable charging socket 17 . The lockable charging socket 17 is electrically connected to the charging current connection 16 . As an alternative to the charging socket 17, the charging current connection 16 can also have an electrical charging cable (not shown) with a charging plug (not shown) arranged on it.

The emergency stop device 18 can be designed and set up to de-energize the charging current connection 16 in the activated state. According to the illustrated embodiment, the charging socket 17 is thus switched off.

According to an alternative variant of this embodiment that is not shown, an electrical charging cable (not shown) could be formed on the wall charging station instead of the charging socket 17 . According to this alternative, the charging cable would also be de-energized.

Alternatively or additionally, the emergency stop device 18 can be designed and set up to switch the charging socket 17 from a locked state to an unlocked state in the activated state. This can be done, for example, by mechanically or electrically unlocking a mechanical lock 19 in the charging socket 17 . The locked and unlocked state can relate to a locking or unlocking of a charging plug (not shown) arranged in the charging socket 17 .

The lock interface 20 of the emergency stop device 18 can have an electrical connection socket 20B.

Furthermore, the emergency stop device 18 can have a flap 22 surrounding a lock interface 20 . The flap 22 can be attached to the housing 12, for example. Furthermore, the flap 22 can be designed and set up in such a way that opening of the flap 22 is irreversible. By this it is meant that once the flap 22 has been opened, it is no longer in its original condition can be closed. For this purpose, the flap 22 can preferably be designed in such a way that the opening of the flap 22 leads to the at least partial destruction of the same. Advantageously, the emergency stop device 18 and/or the flap 22 can be designed in such a way that the flap 22 can be exchanged or replaced. For example, the emergency stop device 18 can have a flap holder 23 for this purpose, which is designed as a hinge, for example.

In order to put the emergency stop device 18 into an activated state, according to this variant, the flap 22 must first be opened irreversibly in order to then engage the lock interface 20 with a key means 100, whereby the emergency stop device 18 is brought into an activated state and thereby the charging current connection 16 switches.

Furthermore, the emergency stop device 18 can also include a seal 24 which is arranged on the flap 22 in such a way that opening the flap 22 inevitably leads to the destruction of the seal 24 .

The emergency stop device 18 can also have an illuminated display 26 for displaying the electrical voltage situation on the emergency stop device 18 . The light display 26 can preferably have one or more LEDs for displaying one or different electrical voltage situations on the emergency stop device 18 .

The indicator light 26 can be designed and set up, for example, to indicate that the charging current connection 16 is free of voltage. If the lock interface 20 is brought into engagement with a key means 100 and the emergency stop device 18 is thereby put into an activated state, the charging current connection 16 is thereby switched and the charging process is interrupted. As soon as the charging current connection 16 is de-energized, this can be indicated by the indicator light 26 . For example, an LED can be provided to indicate by means of lights that a voltage is present at the charging current connection 16 . Another LED can be provided to indicate by means of lights that no voltage is present at the charging current connection 16 .

In order to interrupt the voltage at the charging current connection 16, the emergency stop device 18 can have a CP breaker, for example, which is designed and set up to interrupt the electrical connection in a controlled manner.

Alternatively or additionally, the indicator light 16 can be designed and set up to indicate that the charging socket 17 has been unlocked. If the lock interface 20 is brought into engagement with a key means 100 and the emergency stop device 18 is thereby placed in an activated state, the charging current connection 16 is thereby switched and the charging socket 17 placed in an unlocked state. As soon as the charging socket 17 is in an unlocked state, this is indicated by the indicator light 26 .

1 FIG. 10 further shows a key means 100 which is not part of the wall charging station 10. FIG. For the person skilled in the art it is evident from the present disclosure that the wall charging station is in principle suitable for engagement with a key means 100 .

However, the wall charging station 10 can also have a key means 100 which is designed and set up to be brought into engagement with the lock interface 20 .

According to the 1 In the illustration shown, the key means 100 can have computer hardware 100B with an electrical connection 110B that is complementary to the connection socket 20B. In particular, the electrical connector 110B may include a commercially available cable connector adapter, in which case the lock interface 20 includes a complementary electrical connector.

The key means 100 can also have an executable computer program product which is designed and set up to put the emergency stop device 18 into an activated state when the key means 100 engages with the connection interface 20, as a result of which the charging current connection 16 is switched. For example, the executable computer program product can be designed and set up in such a way that the charging current connection 16 is de-energized.

Alternatively or additionally, the executable computer program product can be designed and set up such that when the key means 100 engages with the connection interface 20, the emergency stop device 18 is switched to an activated state, as a result of which the charging current connection 16 is switched. For example, the executable computer program product can be designed and set up in such a way that the charging socket 17 is switched from a locked state to an unlocked state.

2 shows a perspective view of a wall charging station according to a second embodiment. The same explanations, modes of operation and alternatives as described for the first exemplary embodiment apply to the second exemplary embodiment. The embodiment according to 2 differs from off example according to 1 in that the lock interface 20 has a lock 20A instead of an electrical connection socket 20B.

Accordingly, the wall charging station 10 may further include a key 100A as the key means 100 or as part of the key means 100. FIG. In this case, the term engagement means inserting the key 100A into the lock 20A, preferably in connection with a clockwise rotation of the inserted key.

3 12 shows an embodiment of the wall charging station in connection with a charging plug 200. For example, this is a system of a wall charging station 10 according to the present disclosure and a charging plug 200 which can be lockably received in the lockable charging socket 17. In this case, the emergency stop device 18 can be designed and set up, for example, to mechanically unlock and/or electrically decouple the charging socket 17 in the activated state.

In summary, different variants of wall charging stations 10 in a system consisting of a wall charging station 10 and a charging plug 200 are therefore conceivable.

According to a first variant of the wall charging station 10, the emergency stop device 18 can be designed in such a way that it only de-energizes the charging current connection 16 in the activated state. In this variant, the lock interface and the key means can optionally be designed as a lock and key and/or as a connection socket and a pair of computer hardware. The indicator light 26 can be designed in such a way that it indicates that there is no current or no voltage in the charging current connection 16 and/or the charging socket 17 .

According to a second variant of the wall charging station 10, the emergency stop device 18 can be designed in such a way that, in the activated state, it switches the charging socket 17 from a locked state to an unlocked state. In this variant, the lock interface and the key means can optionally be designed as a lock and key and/or as a connection socket and computer hardware pair. The indicator light 26 can be designed in such a way that it indicates unlocking and/or locking of the charging socket 17 .

According to a third variant of the wall charging station, the emergency stop device can be designed in such a way that, when activated, it can de-energize the charging connection 16 and also switch the charging socket 17 from a locked state to an unlocked state. In this variant, the lock interface and the key means can optionally be designed as a lock and key and/or as a connection socket and computer hardware pair. The indicator light 26 can be designed in such a way that it indicates both the absence of current or voltage of the charging current connection 16 and/or the charging socket 17 and an unlocking and/or locking of the charging socket 17 .

As far as applicable, all individual features that are presented in the exemplary embodiments can be combined with one another and/or exchanged without departing from the scope of the invention.

Reference List

10

wall charging station

12

Housing

14

front cover

16

charge current connector

17

charging socket

18

emergency stop device

18A

activated state of the emergency stop device

20

lock interface

20A

Lock

20B

electrical connection socket

22

flap

23

flap mount

24

seal

26

indicator light

100

key means

100A

Key

100B

computer hardware

102B

bulbs

200

charging plug

Claims (15)

Wall charging station (10) for charging an electric vehicle, comprising a charging current connection (16) and an emergency stop device (18) which is designed and set up to switch the charging current connection (16) when the emergency stop device (18) is in an activated state, characterized characterized in that the emergency stop device (18) has a lock interface (20) to is designed and set up, upon physical intervention with a complementary key means (100), which is not part of the wall charging station (10) and can be brought into engagement with the lock interface (20), to put the emergency stop device (18) in an activated state. Wall charging station (10) after claim 1 , wherein the emergency stop device (18) is designed and set up to de-energize the charging current connection (16) in the activated state, preferably wherein the emergency stop device (18) has a CP breaker for controlled interruption of the electrical connection. Wall charging station (10) after claim 1 or 2 , further comprising a with the charging current connection (16) electrically connected, lockable charging socket (17), wherein the emergency stop device (18) is preferably designed and set up to switch the charging socket (17) from a locked state to an unlocked state in the activated state . Wall charging station (10) according to one of the preceding claims, wherein the lock interface (20) comprises a lock (20A) and/or an electrical connection socket (20B). Wall charging station (10) according to one of the preceding claims, wherein the emergency stop device (18) further comprises a flap (22) surrounding the lock interface (20). Wall charging station (10) after claim 5 , wherein the flap (22) is designed and set up in such a way that opening of the flap (22) is irreversible, preferably wherein the flap (22) is designed such that opening the flap leads to at least partial destruction of the flap (22). . Wall charging station (10) after claim 5 or claim 6 , The emergency stop device (18) and/or the flap (22) being designed in such a way that the flap (22) can be exchanged or replaced. Wall charging station (10) according to one of Claims 5 until 7 , wherein the emergency stop device (18) further comprises a seal (24) which is arranged on the flap (22) that opening the flap (22) inevitably leads to the destruction of the seal (24). Wall charging station (10) according to one of the preceding claims, in which the emergency stop device (18) also has an illuminated display (26) for displaying an electrical voltage situation on the emergency stop device (18), the illuminated display (26) preferably having one or more LEDs for displaying one or having different electrical voltage situations at the emergency stop device (18). Wall charging station (10) after claim 9 , wherein the indicator light (26) is designed and set up to indicate the absence of voltage in the charging current connection (16) and/or to indicate unlocking and/or locking of the charging socket (17). A wall charging station (10) according to any one of the preceding claims, further comprising key means (100) constructed and arranged to be engaged with the lock interface (20). Wall charging station (10) after claim 11 wherein the lock interface (20) includes a lock (20A) and wherein the key means (100) includes a key (100A). Wall charging station (10) after claim 11 , wherein the lock interface (20) has an electrical connection socket (20B) and the key means (100) has a computer hardware (100B) with a connection socket (20B) complementary electrical connection (200B). Wall charging station (10) according to one of Claims 12 or Claim 13 , wherein the key means (100) also has an executable computer program product which is designed and set up to put the emergency stop device (18) into an activated state when the key means (100) engages with the lock interface (20), whereby the charging current connection (16) is switched. System consisting of a wall charging station (10) according to one of the previous ones Claims 1 - 14 and a charging plug (200), the wall charging station (10) having a lockable charging socket (17) which is arranged on the charging current connection (16) and in which the charging plug (200) can be received in a lockable manner, the emergency stop device (18) being designed and set up for this purpose To mechanically unlock and/or electrically decouple the charging socket (17) in the activated state.

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