DE102013202127A1 - Energy transmission assembly for energy transmission system located in public space, has sensing unit that detects motion quantity and provides sensor signal based on motion quantity - Google Patents

Abstract

The energy transmission assembly (14) has an energy transmission unit (22) that is coupled with a connection unit (20), in order to exchange electrical power between a power supply network (24) and an electrical energy store (12). A sensing unit (28) detects a motion quantity and provides a sensor signal based on motion quantity. An evaluation unit (32) introduces predefined actions based on sensor signal, and measures a transmission of a message signal (38) by using data transmission unit (34) and/or an electrical decoupling of energy transmission unit and connection unit. An independent claim is included for an energy transmission system.

Description

The present invention relates to an energy transmission arrangement, in particular a charging station, with a connection unit which can be coupled to an electrical energy store of an electrically driven vehicle, and to an energy transmission unit which is connected to a power supply network and which can be electrically coupled to the connection unit to generate electrical energy to exchange between the power grid and the electrical energy storage.

Furthermore, the present invention relates to a power transmission system with a plurality of power transmission arrangements according to the type described above.

State of the art

In the field of motor vehicle drive technology, it is well known to use an electric machine as a sole drive or together with a drive motor of another type (hybrid drive). In such electric or hybrid vehicles, electric machines are typically used as a drive motor, which are powered by an electrical energy storage, such. an accumulator to be supplied with electrical energy. The electrical energy storage of electric vehicles or plug-in hybrid vehicles must be regularly connected depending on the state of charge with an electrical power grid to load the energy storage with electrical energy.

For the charging of the electrical energy storage, the vehicle must be electrically connected to a so-called charging station. This is usually done by means of a cable which is connected to a socket of the charging station.

Electric energy storage with a high load capacity, on the one hand, a high weight and on the other hand lead to high costs. For this reason, in many cases energy storage devices with a lower charging capacity are installed in electric vehicles or plug-in hybrid vehicles. As a result, the vehicle must be connected to a charging station as often as possible in order to ensure the vehicle is ready to drive. This requires that a large number of charging stations be provided in public (or semi-public) space.

Since the charging stations are arranged in public space, they must be constructed very solid in order to be able to absorb even large shocks (for example due to vandalism, vehicle collisions, etc.). However, this leads to a very costly overall construction of the charging station. This disadvantage weighs the heavier, since a very large number of charging stations is needed.

Even though major damage to the charging stations is extremely rare, the charging stations must nevertheless be designed for such situations, as the charging stations are located in public areas and can pose a safety risk in the event of damage. For example, after damage, live parts of the charging station can come into contact with the housing of the charging station. Last but not least, there is also a liability risk for the operator of the charging stations, who for this reason is interested in reliably securing the charging stations.

Disclosure of the invention

The present invention therefore provides an energy transmission arrangement with a connection unit that can be coupled to an electrical energy store of an electrically driven vehicle, a power transmission unit that is connected to a power supply network and that can be electrically coupled to the connection unit in order to generate electrical energy between the power supply network and the electrical system Energy storage to replace, a sensor unit which is adapted to detect at least one motion variable and on the basis of the amount of motion to provide a sensor signal, and an evaluation ready, which is electrically coupled to the sensor unit and which is designed to predefined on the basis of the sensor signal Initiate measures, wherein the measures a sending a message signal by means of a data transmission unit and / or an electrical decoupling of the power transmission unit of the terminal have unit.

Further, the present invention provides a power transmission system having a plurality of power transmission devices according to the present invention and a central processing unit connected to the power transmission devices via a communications network and configured to determine a routing pattern based on an order of the received communications signals using a model. according to which the energy transmission arrangements are exposed to an acceleration effect.

Advantages of the invention

By the sensor unit shocks / shocks can be reliably detected against the power transmission arrangement. With the help of the evaluation unit, the detected shocks are evaluated and appropriate measures have been initiated. For example, a message signal may be sent out to register the detected bursts in a data processing unit. Furthermore, the energy transmission unit can be electrically decoupled from the connection unit to ensure that, for example, no live parts are in contact with a housing of the energy transmission arrangement. As a result, the power transmission assemblies can be constructed less massive and thus cost savings.

By sending the message signals to the central processing unit damage to the power transmission arrangements are detected immediately. With the help of an evaluation of the order of the received message signals in the central processing unit further hazards can be reduced or further damage can be avoided. Thus, based on the evaluation, a prediction can be made as to which energy transmission arrangement will possibly be exposed to another vandalism attack. Thus, by means of the central detection of the message signals, the security of the power transmission system can be increased.

By the immediate detection of the damage can also be estimated whether a repair must be done immediately or can be carried out as part of a regular maintenance of the power transmission arrangement. In addition, it is possible to determine the required spare parts due to the nature of the shocks detected. Thus, the spare parts can be carried along with the upcoming repair.

It is particularly advantageous if the sensor unit has at least one acceleration sensor which is designed to detect an acceleration of the energy transmission arrangement as the movement variable.

With the aid of the acceleration sensor, shocks against the energy transmission arrangement or even vibrations of the energy transmission arrangement can be detected very reliably. The resulting measures ensure the greatest possible security.

In a further embodiment, the sensor unit is designed to carry out a self-monitoring.

The self-monitoring function ensures that the sensor unit is working properly. Thus, the reliability of the sensor unit and the power transmission device can be increased.

In a further embodiment, the energy transmission arrangement can also have a plurality of sensor units each having an acceleration sensor. Thus, the respective sensor signals can be compared for plausibility. Due to the associated redundancy, the power transmission arrangement is also protected against the failure of one of the sensor units. This leads to increased safety of the energy transmission arrangement.

According to a further embodiment, the sensor unit is arranged on a substantially rigid frame structure of the energy transmission arrangement.

By this measure, shocks / shocks against the energy transmission arrangement can be detected particularly reliable.

In a further embodiment, the evaluation unit is designed to compare the detected sensor signal with a predefined threshold value and to initiate the measures if the detected sensor signal exceeds the threshold value.

As a result, the predefined measures are only initiated when the impact against the energy transmission arrangement is deemed to be relevant. As a result, for example, a decoupling of the power transmission unit can be avoided by the terminal unit due to small shocks or shocks. This leads to a more reliable operation of the power transmission arrangement. The number of false alarms is minimized.

According to a further embodiment, the evaluation unit is configured to compare the detected sensor signal with a predefined value profile and to select and initiate the measures based on the comparison.

For example, measurements of characteristic impacts can be stored as value profiles in the evaluation unit. A steep increase in acceleration may indicate a hard object such as a hammer. This is in all likelihood a vandalism attack. By contrast, if a very flat increase in acceleration is recorded, this indicates softer parts such as a bumper. Thus, only one vehicle could collide with the energy transfer assembly. Depending on the value profile determined by the comparison, the appropriate measure is selected and initiated. If, for example, due to the detected acceleration, a risk for the environment outside the energy transmission arrangement is estimated, then the flow of the Power transmission arrangement by decoupling the power transmission unit of the connection unit off.

According to a further embodiment, the evaluation unit is designed to evaluate the detected sensor signal by means of a mathematical model and to select and initiate the measures on the basis of the evaluation.

In this embodiment, the evaluation of the sensor signal is on a mathematical basis (e.g., similar to known airbag systems). Accordingly, in this embodiment it is not necessary to carry out measurements of characteristic impacts and store them in the evaluation unit. Consequently, the detected sensor signal does not have to be compared with the stored value profiles either. This leads to a more precise evaluation of the sensor signal, since the sensor signal is evaluated individually and does not have to be assigned to a discrete value profile.

In a further embodiment, the detected sensor signal is evaluated by means of a mathematical model and additionally compared with the value profiles stored in the evaluation unit.

Thus, e.g. the result of a mathematical evaluation based on the existing value profiles are plausibility. This increases the reliability of the evaluation of the sensor signal.

According to a further embodiment, the data transmission unit is coupled to a communication network, wherein the evaluation unit is configured to transmit the message signal to an external receiver of the communication network.

The communication network may e.g. a wireless communication network such as e.g. a GSM or UMTS mobile network. Alternatively, a wired communication network may also be used, e.g. the power transmission arrangement connects to the central processing unit. By transmitting the message signal, e.g. Task forces are informed who perform a repair of the power transmission arrangement. If strong impacts are detected by the energy transmission arrangement, which indicate vandalism, police forces can also be requested in good time, which counteract further damage to the energy transmission arrangement.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the invention.

Brief description of the drawings

1 shows a schematic view of an embodiment of a power transmission arrangement according to the invention; and

2 shows in schematic form a power transmission system having a plurality of power transmission arrangements.

Embodiments of the invention

In 1 is a motor vehicle shown schematically and generally with 10 designated. The car 10 has an in 1 unspecified drive train, which includes an electric induction machine for the provision of drive power in the present case.

In the present embodiment, it should be assumed that the drive train is adapted to the motor vehicle 10 to drive alone by means of the electric induction machine (electric vehicle). In an alternative embodiment, however, the electric induction machine can be part of a hybrid drive train, wherein the drive train another, in 1 unspecified drive motor such as an internal combustion engine or the like. May include. For example, the alternative embodiment may be a plug-in hybrid vehicle.

The electric vehicle 10 has a traction battery 12 on, which provides electrical energy for operating the electric induction machine. Depending on the operating time and the power provided, the traction battery 12 be recharged with electrical energy at certain intervals. This is the electric vehicle 10 with a charging station 14 electrically connected. Specifically, the traction battery becomes exemplary 12 via a charger 16 and a charging cable 18 with a connection unit 20 the charging station 14 coupled.

The charging station 14 also has an energy transfer unit 22 on that with a power grid 24 is connected and which has a switch 26 with the connection unit 20 electrically coupled. The energy transfer unit 22 serves to provide electrical energy between the power grid 24 and the traction battery 12 exchange. In the present case is from the power grid 24 electrical energy is fed to the traction battery 12 again charge. Here is the switch 26 while charging the traction battery 12 closed.

According to the invention, the charging station 14 a sensor unit 28 with an acceleration sensor, which is designed to accelerate the charging station 14 capture. For example, with the aid of the acceleration sensor, a shock 30 (eg with a hammer) against the charging station 14 be recorded.

Furthermore, for example, a collision 30 ' of the electric vehicle 10 with the charging station 14 (eg when maneuvering the electric vehicle 10 ). Furthermore, a collision 30 ' any vehicle with the charging station 14 be recorded. Here is the sensor unit 28 advantageously on a rigid frame of the charging station 14 attached to a reliable detection of the acceleration of the charging station 14 to be able to guarantee.

In a further embodiment, the charging station 14 also several sensor units 28 each having an acceleration sensor. Due to the redundancy implemented with it, a higher level of reliability with regard to the detection of possible shocks of the charging station 14 guaranteed. In addition, by a plurality of sensor units 28 a plausibility check of the measurement results and a mutual monitoring of the sensor units 28 will be realized.

Furthermore, the charging station 14 an evaluation unit 32 on that with the sensor unit 28 and with a data transmission unit 34 the charging station 14 is electrically coupled. In addition, the evaluation unit 32 designed to be the switch 26 between the power transmission unit 22 and the connection unit 20 to press.

The data transmission unit 34 is with a communication network 36 , in this case a mobile network 36 (eg GSM network), coupled. Alternatively, the data transmission unit 34 also with a wired communication network 36 be connected.

For example, during a vandalism attack with a hammer a blow 30 against the charging station 14 executed, so will the blow 30 from the sensor unit 28 detected by the motion sensor and provided a sensor signal to the evaluation unit 32 is forwarded. In the evaluation unit 32 the detected sensor signal is first compared with a predefined threshold to determine whether the detected beat 30 is a valuation-relevant event. This is to prevent insignificant events (such as leaning against the charging station 14 ) lead to a false alarm.

If the detected sensor signal exceeds the threshold value, then the sensor signal with predefined value profiles, which are in the evaluation unit 32 stored compared.

The value profiles may, for example, be measurements that are in advance for characteristic impacts against the charging station 14 were carried out. For example, a steep increase in acceleration points to a hard object (such as a hammer). In contrast, a relatively flat increase in acceleration is characteristic of softer parts, such as a bumper of the electric vehicle 10 ,

Alternatively or additionally, the sensor signal can be evaluated using a mathematical model (comparable to algorithms used in airbag systems). An additional evaluation by means of the mathematical model achieves a further assurance of the evaluation results.

If the detected sensor signal exceeds the threshold value, then the evaluation unit 32 initiated predefined actions. If, for example, the detected acceleration poses a risk to the environment outside the charging station 14 estimated by the evaluation unit 32 the desk 26 opened to the power transmission unit 22 electrically from the connection unit 20 to decouple. This will be a possible charging of the traction battery 12 interrupted. Even if no charging is active, this measure provides additional electrical protection of the charging station 14 reached.

If, for example, very strong impacts are detected, which indicate vandalism, then, as a further measure, by means of the data transmission unit 34 a message signal 38 over the communication network 36 to a central processing unit 40 be transmitted. In this case, the central processing unit 40 be a central computer of a control center or the police. Thus, with the help of the message signal 38 eg a service emergency service and / or the police are informed about the vandalism attack. This means that the appropriate measure is selected as a function of the evaluation of the sensor signal and then initiated. It is understood that depending on the evaluation of the sensor signal, several measures can be selected from a variety of measures. In principle, a blow 30 to local measures (eg switching off the power by means of the switch 26 ) or to notify the central processing unit 40 (eg for requesting emergency services).

In 2 is an energy transfer system 42 with a plurality of charging stations 14a to 14d shown. Each of the charging stations 14a to 14d is over the communication network 36 with the central processing unit 40 connected to a control center.

For clarity, the individual units of the charging stations 14 and the connections to the power grid 24 not shown. It is understood, however, that the charging stations 14a to 14d analogous to that in 1 illustrated embodiment may be formed.

It should now be assumed that the charging stations 14 are exposed to a vandalism attack and, as a result, the beatings 30a . 30b against the charging stations 14a . 14b be executed. Due to the recorded beats 30a . 30b transmit the charging stations 14a . 14b the message signals 38a . 38b to the central processing unit 40 , By means of the central processing unit 40 is the order of received message signals 38a . 38b analyzed to expiration pattern of damage or shocks 30a . 30b against the charging stations 14 to investigate. This makes it possible, using the determined sequence pattern that of the charging stations 14 to predict against which a possible further vandalism attack (see beat 30c ) could be directed. Will eg the charging station 14c predicted, so police forces can already in advance to the charging station 14c ordered to convict the perpetrators.

Due to the inventive design of the charging stations 14 The charging stations can be constructed less massive. This leads to a high cost saving potential in the provision of the charging stations 14 ,

Claims (9)

Energy transfer arrangement ( 14 ) with: - a connection unit ( 20 ), which are connected to an electrical energy store ( 12 ) of an electrically driven vehicle ( 10 ), - a power transmission unit ( 22 ) connected to a power grid ( 24 ) and connected to the connection unit ( 20 ) is electrically coupled to electrical energy between the power grid ( 24 ) and the electrical energy storage ( 12 ), - a sensor unit ( 28 ) which is designed to detect at least one movement variable and to provide a sensor signal on the basis of the movement variable, and - an evaluation unit ( 32 ) connected to the sensor unit ( 28 ) is electrically coupled and which is adapted to initiate predefined measures on the basis of the sensor signal, wherein the measures include sending a message signal ( 38 ) by means of a data transmission unit ( 34 ) and / or electrical decoupling of the energy transfer unit ( 22 ) from the connection unit ( 20 ) exhibit. Energy transfer assembly according to claim 1, wherein the sensor unit ( 28 ) has at least one acceleration sensor, which is designed to provide an acceleration ( 30 ) of the energy transfer arrangement ( 14 ) as the motion quantity. Energy transfer arrangement according to claim 1 or 2, wherein the sensor unit ( 28 ) is adapted to carry out a self-monitoring. Energy transfer arrangement according to one of claims 1 to 3, wherein the sensor unit ( 28 ) on a substantially rigid frame structure of the energy transfer arrangement ( 14 ) is arranged. Energy transmission arrangement according to one of claims 1 to 4, wherein the evaluation unit ( 32 ) is adapted to compare the detected sensor signal with a predefined threshold value and to initiate the measures if the detected sensor signal exceeds the threshold value. Energy transfer arrangement according to one of claims 1 to 5, wherein the evaluation unit ( 32 ) is adapted to compare the detected sensor signal with a predefined value profile and to select and initiate the measures based on the comparison. Energy transfer arrangement according to one of claims 1 to 6, wherein the evaluation unit ( 32 ) is designed to evaluate the detected sensor signal by means of a mathematical model and to select and initiate the measures on the basis of the evaluation. Power transmission arrangement according to one of Claims 1 to 7, the data transmission unit ( 34 ) with a communications network ( 36 ) and wherein the evaluation unit ( 32 ) is adapted to the message signal ( 38 ) to an external receiver ( 40 ) of the communication network ( 36 ). Energy transfer system comprising: - a plurality of energy transfer arrangements ( 14 ) according to claim 8, and - a central processing unit ( 40 ) transmitted via the communications network ( 36 ) with the energy transfer arrangements ( 14 ) and the adapted to be based on an order of received message signals ( 38 ) to determine by means of a model a sequence pattern according to which the energy transmission arrangements ( 14 ) of an acceleration effect ( 30 ) are exposed.

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