WO2012034639A2

WO2012034639A2 - Motor vehicle charging apparatus

Info

Publication number: WO2012034639A2
Application number: PCT/EP2011/004271
Authority: WO
Inventors: Thomas Beikert; Alexander Guist; Thorsten Locht; Peter Ziegler
Original assignee: Daimler Ag
Priority date: 2010-09-16
Filing date: 2011-08-25
Publication date: 2012-03-22
Also published as: DE102010045686A1; WO2012034639A3

Abstract

The invention proceeds from a motor vehicle charging apparatus having at least two charging connections (10a, 11a; 10b, 11b) and having at least one charging unit (12a; 12b) which is provided for the purpose of charging an energy storage means via one of the two charging connections (10a, 11a; 10b, 11b). The invention proposes that the motor vehicle charging apparatus has at least one changeover unit (13a; 13b) which is provided for the purpose of selectively electrically connecting one of the at least two charging connections (10a, 11a; 10b, 11b) to the charging unit (12a; 12b).

Description

Car charger

The invention relates to a motor vehicle loading device according to the preamble of claim 1.

From DE 603 19 570 T2 a Kraftfahrzeugiadevornchtung is already known with at least two charging terminals and at least one charging unit, which is intended to charge an energy storage device via one of the two charging ports.

The invention is in particular the object of increasing the ease of use of Kraftfahrzeugiadevornchtung. It is achieved according to the invention by the features of claim 1. Further embodiments emerge from the subclaims.

The invention is based on a motor vehicle charging device with at least two charging connections and with at least one charging unit, which is intended to charge an energy store via one of the two charging connections.

It is proposed that the Kraftfahrzeugiadevornchtung has at least one switching unit, which is provided to selectively connect one of the at least two charging terminals electrically connected to the charging unit. As a result, a simultaneous use or a simultaneous connection of the charging connections to the charging unit can be avoided, whereby an incorrect operation of the Kraftfahrzeugiadevornchtung can be prevented. By avoiding the incorrect condition, a plurality of vehicle-side charging ports can be used, which can increase accessibility in a charging process, whereby an ease of use of the motor vehicle charging device can be increased. A "charging connection" is to be understood as meaning, in particular, a unit which has at least one contact which can be connected to the energy storage unit electrically, the charging connection being preferably for connection to an external one Power source provided for charging the energy storage. In this context, an "external power source" is to be understood in particular as meaning a power grid independent of the motor vehicle charging device, in particular a public power grid In this context, "optionally" is to be understood in particular as meaning that the switching unit only connects the first charging connection in a first switching state and only the second charging connection with the charging unit in a second switching state. When the first charging connection is connected, the second charging connection is preferably electrically separated from the charging unit. When the second charging connection is connected, the first charging connection is preferably electrically separated from the charging unit. In this case, "electrically separated" is to be understood in particular as meaning that at least one line between the charging connection and the charging unit has an infinite electrical resistance, wherein preferably at least all lines carrying voltage in a charging operation are separated between the charging connection and the charging unit in a disconnected state In the loading operation, the electrically separate charging connection is voltage-free or potential-free, and the term "provided" should be understood to mean in particular specially programmed, equipped and / or designed.

It is further proposed that the at least two charging connections are arranged in parallel. As a result, a particularly advantageous motor vehicle charging device can be provided. By "arranged in parallel", it should be understood, in particular, that the charging connections are switched priority-free with respect to a charging process, ie, neither of the two charging ports is particularly distinguished from the other.Preferably, the charging process by which the energy storage device is charged is independent of the one used Advantageously, the charging connections are connected in an equivalent manner to the charging unit.

In an advantageous embodiment, the at least two charging ports are formed equivalent. As a result, accessibility can be increased particularly easily. By "equivalent charging connections" is meant, in particular, charging connections having identical functions, identical dimensions and / or identical contacts Advantageously, it is completely immaterial which of the charging connections is used to charge the energy storage device Charging unit is connected, and a charging operation in which the second charging port is connected to the charging unit, are preferably identical. Preferably, the charging ports differ only by their position on a motor vehicle.

It is further proposed that the motor vehicle charging device has a sensor which is provided to detect at least one state parameter of the charging connections. As a result, a particularly advantageous motor vehicle charging device can be realized. A "state parameter" is to be understood as meaning, in particular, a parameter by means of which a charging connection which is used first for charging the energy store can be determined Advantageously, the state parameter is a current applied to the charging connection as an electrical voltage applied to the charging connection A "charging plug" should in particular be understood to mean an element which is connected to the external power source and connected to the charging device for charging the external energy source to the motor vehicle charging device and thus to charge the energy storage device.

It is also proposed that the switching unit has at least one first changeover switch, which is provided to switch a communication connection. As a result, the charging unit is always connected via the communication connection with only one of the charging ports, which can be dispensed with a constructive adaptation of the charging unit to multiple charging circuits and existing charging units can be used. A "communication connection" is to be understood, in particular, as a connection by which a control and / or regulating unit is or is connected to further control and / or regulating units and / or to sensor units, whereby the units communicate with one another and data and / or Preferably, the control and / or regulating units transmit and / or receive data from the sensor system via the communication connection.

In particular, it is advantageous if the sensor system has at least two sensor units assigned to the charging terminals, and the first switch is provided to selectively connect at least one of the at least two sensor units to the charging unit. Thereby, a communication of the charging unit with the sensor can be realized particularly advantageous. In this context, the term "optionally" is to be understood in particular as meaning that the first changeover switch and thus the changeover unit only have the sensor unit assigned to the first charge connection in a first switching state of the first changeover switch and only the sensor unit associated with the second charge connection in a second switching state of the first changeover switch of the Charging unit connects. If the sensor unit which is assigned to the first charging connection is connected to the charging unit, the sensor unit which is assigned to the second charging connection is preferably decoupled from the charging unit. If the sensor unit which is assigned to the second charging connection is connected to the charging unit, the sensor unit which is assigned to the first charging connection is preferably decoupled from the charging unit. Advantageously, the first switch selectively sets the communication link between the sensor units and the control and / or regulating unit.

Furthermore, it is advantageous if the switching unit has at least one second change-over switch, which is coupled to the first change-over switch with the first change-over switch and is intended to switch a charging connection. As a result, it is particularly easy to realize an optional connection of the charging connections and the charging unit. A "charging connection" is to be understood, in particular, as a connection by which the charging connections are or are connected to the charging unit and thus to the energy store in order to charge the energy store.

Particularly preferably, the motor vehicle charging device has a control and / or regulating unit, which is provided to control the switching unit as a function of the state parameter of the sensor system. As a result, an independent or automatic connection of the charging connections to the charging unit can be realized. A "control and / or regulating unit" should be understood to mean, in particular, a unit having at least one control unit, in particular a unit with a processor unit and with a memory unit and with one in the

Memory unit stored operating program are understood. In principle, the control and / or regulating unit can have a plurality of interconnected control units, which are preferably provided via a bus system, such as

in particular a CAN bus system to communicate with each other.

In a further embodiment according to the invention, it is proposed that the control and / or regulating unit is provided for independently electrically connecting only the charging connection to the charging unit, on which a charging connector was first arranged. As a result, a particularly advantageous independent connection of the charging connections to the charging unit can be realized, whereby the incorrect operation can be avoided particularly easily. Preferably, the charging port on which the charging plug was first arranged, at least as long connected to the charging unit until the Charging plug is removed from the charging port. Advantageously, the charging connection at which the charging plug was first arranged remains even if an additional charging plug has additionally been arranged on the other charging connection. In principle, it is also conceivable to decouple an electrical connection between the two terminals of the charging unit in the event of the arrangement of two charging plugs in both charging connections and thus to interrupt the charging process. Alternatively or additionally, a sensor system can be attached to the charging connections, by means of which the simultaneous use is recognizable and possibly signaled. By "arranged at the charging port" should be understood in this context, in particular inserted or introduced in the charging port.

Furthermore, it is advantageous if the sensor system has at least one proximity sensor. As a result, a particularly simple state detection of the charging connections can be realized. A "proximity sensor" is to be understood in particular as meaning a sensor which reacts without contact on the approach of an element, in particular without direct contact with the element can be designed inductively, capacitively, magnetically and / or optically.

It is also proposed that the switching unit is at least partially integrated in the loading unit. Thereby, a complexity of the vehicle loading device can be reduced. The term "integrated" is to be understood in particular as meaning that the switching unit is arranged at least partially in a common housing with the charging unit. The switching unit and the charging unit are at least partially embodied in one piece, the switching unit and the charging unit particularly advantageously having a common control unit ,

Furthermore, a method is proposed with a motor vehicle charging device having at least two separately arranged charging connections and with at least one charging unit, in which the charging unit charges an energy store via one of the two of the charging connections, wherein optionally one of the at least two charging connections is electrically connected to the charging unit, whereby one Operating comfort of the motor vehicle charging device can be increased. Preferably, a state parameter of the charging connections is detected for switching over. Further advantages emerge from the following description of the drawing. In the drawings, two embodiments of the invention are shown. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Showing:

Fig. 1 is a circuit diagram of a motor vehicle loading device and

Fig. 2 is a circuit diagram of an alternative motor vehicle loading device.

FIG. 1 shows a circuit diagram of a motor vehicle charging device. The motor vehicle charging device is formed as a motor vehicle energy storage charging device. The motor vehicle charging device is provided for charging an energy accumulator of a motor vehicle loading device having motor vehicle. The energy store is designed as a traction battery. The motor vehicle is designed as a hybrid motor vehicle. In principle, the motor vehicle can also be designed as an electric motor vehicle and / or have a plurality of energy stores.

For connection to an external power source, the motor vehicle charging device has a first charging connection 10a and a second charging connection 11a. The charging terminals 10a, 11a are arranged parallel to each other. A connection of the two charging connections is the same in each case, as a result of which the charging connections 10a, 11a can in principle also be exchanged without the connection changing.

The two charging ports 10a, 11a are spaced from each other. The two charging terminals 10a, 11a are formed equivalently. The charging ports 10a, 11a are provided in particular for connection to the same external power source. The charging ports 10a, 11a are each provided for receiving a charging plug 21a, 22a. In both charging ports 10a, 11a while the same charging plug can be inserted. The charging ports 10a, 11a are arranged on a body outer wall of the motor vehicle. The first charging port 10a and the second charging port 11a are each arranged in mirror image on two opposite body outer walls of the motor vehicle. The charging ports 10a, 11a are each arranged in a mirror triangle of the motor vehicle. For detecting a plurality of state parameters of the charging connections 0a, 11a, the motor vehicle charging device has a sensor system 14a. The state parameters are formed as an applied current at the charging terminals 10a, 11a as an applied voltage at the charging terminals 0a, 11a. For this purpose, the sensor system 14a has a plurality of sensors. In principle, the sensor system 14a can additionally or alternatively also detect further state parameters. Additional state parameters may be, for example, a mains frequency, a ground fault, a fault current, and the like.

The sensor system 14a has a first sensor unit 17a and a second sensor unit 18a. The sensor units 17a, 18a are formed equivalently. The two sensor units 17a, 18a are each assigned to a charging port 10a, 11a. The first sensor unit 7a is associated with the first charging port 10a and the second sensor unit 18a is associated with the second charging port 11a. The first sensor unit 17a detects the state parameters of the first charging port 10a. The second sensor unit 18a detects the state parameters of the second charging port 11a.

For charging the energy storage device via one of the two charging connections 10a, 11a, the motor vehicle charging device has a charging unit 12a. The charging unit 12a has an input 24a and an output 25a. The input 24a of the charging unit 12a is provided for electrical connection to one of the charging terminals 10a, 11a and thus for connection to a charging connection 26a. The input 24a of the charging unit 12a is further provided for electrical connection to one of the sensor units 17a, 18a and thus for connection to a communication connection 16a. The output 25a of the charging unit 2a is electrically permanently connected to the energy storage unit.

The charging unit 12a has an inverter 23a. The inverter 23a is formed as an AC / DC converter. The inverter 23a converts an AC voltage of the external power source which is applied to the input 24a of the charging unit 2a into a DC voltage for the energy store which is applied to the output 25a of the charging unit 12a. The inverter 23a charges the energy store with the DC voltage. The charging unit 12a is formed as an on-board charging unit.

For optional electrical connection of the two charging ports 10a, 11a to the charging unit 12a, the motor vehicle charging device has a switching unit 13a. The switching unit 13a electrically connects either the two charging ports 10a, 11a via the charging unit 12a with the energy storage. The switching unit 13a binds the Input 24a of the charging unit 12a to the charging connection 26a. The switching unit 3a has an input 27a and an output 28a. The input 27a of the switching unit 13a is electrically permanently connected to the two charging terminals 10a, 11a and to the two sensor units 17a, 18a. The input 27a is permanently connected to the charging connection 26a and to the communication connection 16a. The output 28a of the switching unit 13a is electrically permanently connected to the input 24a of the charging unit 12a.

The switching unit 13a has a first changeover switch 15a and a second changeover switch 19a. The first changeover switch 15a and the second changeover switch 19a are interconnected by switching technology. Actuation of the first changeover switch 15a results in equivalent operation of the second changeover switch 19a. The switches 15a, 19a are thus operated simultaneously. The first switch 15a is associated with the communication link 16a. The second changeover switch 19a is associated with the charging connection 26a. In this embodiment, the first changeover switch 15a and the second changeover switch 19a are formed by a relay.

The changeover switches 15a, 19a electrically connect in each case the input 27a of the switching unit 13a to the output 28a of the switching unit 13a. The first change-over switch 15a selectively switches the communication connection 16a between the sensor units 17a, 18a of the charging terminals 10a, 11a and the charging unit 12a. The first change-over switch 15a optionally connects the sensor unit 17a assigned to the charging terminal 10a and the sensor unit 18a assigned to the charging terminal 11a to the input 24a of the charging unit 12a. The first switch 15a connects the input 24a of the charging unit 12a to the communication link 16a. The charging unit 12a communicates through the communication link 16a with either the sensor unit 17a or the sensor unit 18a. By the first switch 15a, only a single communication link 16a is switched, i. either the sensor unit 17a of the charging port 10a or the sensor unit 18a of the charging port 11a is electrically connected to the charging unit 12a.

The second changeover switch 19a selectively switches the charging connection 26a between the charging terminals 10a, 11a and the charging unit 12a. The second switch 19a selectively switches the electrical connection between the charging terminals 10a, 1a and the input 24a of the charging unit 12a. The second changeover switch 19a connects the input 24a of the charging unit 12a to the charging connection 26a. The second changeover switch 19a thus selectively connects the charging port 10a and the charging port 11a to the charging unit 12a. The charging unit 12a is electrically connected through the charging connection 26a to either the charging port 10a or the charging port 11a. The charging unit 12a charges the energy store by means of a voltage applied to the charging connection 26a. Only a single charging connection 26a is connected through the second changeover switch 19a, ie either the charging connection 10a or the charging connection 11a is electrically connected to the charging unit 12a.

For controlling the switching unit 13a, and thus of the first switch 15a and the second switch 19a, in dependence on the state parameters of the sensor 14a, the motor vehicle charging device has a control and regulation unit 20a. In this embodiment, the control unit 20a controls the switching unit 13a in response to a state parameter formed as a contact of the charging plugs 21a, 22a with the charging terminals 10a, 11a.

The sensor units 17a, 18a each include a proximity sensor. The proximity sensor is capacitive. Based on the proximity sensor recognizes the control unit 20a as soon as one of the charging connector 21a, 22a is plugged into one of the charging ports 10a, 11a.

The control unit 20a has a switching control unit 29a and a charge control unit 30a. The switching control device 29a and the charge control device 30a are self-contained. The switching control device 29a is integrated in the switching unit 13a. The charge controller 30a is integrated in the charging unit 12a. The switching unit 13a and the charging unit 12a thus each have an integrated intelligence.

The switching control device 29a is permanently connected to the sensor unit 17a of the charging port 10a and to the sensor unit 18a of the charging port 11a. The switching control device 29a is permanently connected through the communication link 16a to both sensor units 17a, 18a and thus communicates with the sensor units 17a, 18a of the charging ports 10a, 11a constantly. The switching control device 29a controls the second changeover switch 19a and thus the first changeover switch 15a as a function of the state parameter formed as the contact of the charging connectors 21a, 22a.

The switching control device 29a switches the first changeover switch 15a equivalent to the second changeover switch 19a. That is, the switching control unit 29a connects the first sensor unit 17a of the charging terminal 10a in an operating state by the first changeover switch 15a and also the first one at the same time by the second changeover switch 19a Charging terminal 10a electrically connected to the output 28a of the switching unit 13a and thus with the charging unit 12a. The switching control device 29a thus adjusts the communication connection 16a and the charging connection 26a of the first charging port 10a to the charging unit 12a. In this case, the sensor unit 18a of the other charging port 11a and the other charging port 11a are separated from the charging unit 12a. The charging port 11a is de-energized.

In another operating state, the changeover control device 29a connects the second sensor unit of the second charging connection 11a and the second changeover switch 19a simultaneously also electrically connects the second charging connection 11a to the output 28a of the switching unit 3a and thus to the charging unit 12a (as shown in FIG 1). The switching control device 29a thus adjusts the communication connection 16a and the charging connection 26a of the second charging port 1a to the charging unit 12a. In this case, the sensor unit 17a of the other charging port 10a and the other charging port 10a are separated from the charging unit 12a. The charging port 10a is de-energized. The switching control unit 29a of the control and regulation unit 20a electrically connects through the two switches 15a, 19a only the charging terminal 10a, 11a to the charging unit 12a, at which the conditional parameter formed as the contact of the charging connectors 21a, 22a was detected first and thus at the charging terminal 10a, 11a was placed first.

The charge controller 30a is permanently connected to the output 28a of the switching unit 3a. The charge controller 30a is permanently connected through the communication link 16a to the output 28a of the switching unit 13a. The charging controller 30a monitors the charging port 10a or the charging port 11a through the communication link 16a connected by the first changeover switch 15a. The charge control device 30a of the charging unit 12a thus monitors a charging process through the switched charging port 10a, 11a. The charge control device 30a thus monitors the applied current, the voltage applied and the contact of the charging plug 21a, 22a.

In principle, the charging control unit 30a could also monitor the mains frequency, the ground fault, the fault current, etc.

To connect the charging ports 10a, 11a, the sensor units 17a, 18a, the switching unit 13a, the charging unit 12a and the energy storage device, the motor vehicle charging device has the charging connection 26a and the communication connection 16a. The charging connection 26a runs from the charging terminals 10a, 11a into the input 27a of the switching unit 13a. The second switch 19a optionally connects the charging connection 26a of the charging port 0a or the charging connection 26a of the charging port 11a with the output 28a of the switching unit 13a. The charging connection 26a continues to run from the output 28a of the switching unit 13a into the input 24a of the charging unit 12a and from the output 25a of the charging unit 12a into the energy store. The charging connection 26a is designed as a high-voltage or high-voltage line. The charging terminals 10a, 11a, the second changeover switch 19a, the inverter 23a and the energy storage are connected to each other by the high voltage lines.

The communication link 16a passes from the sensor units 17a, 18a of the charging ports 10a, 11a to the input 27a of the switching unit 3. The communication link 16a goes to the switching control device 29 and the first changeover switch 15a. The first switch 15a selectively connects the communication connection 16a of the sensor unit 7a or the sensor unit 18a to the output 28a of the switching unit 13a. The communication link 16a continues to run from the output 28a of the switching unit 13a to the input 24a of the charging unit 12a. The communication link 16a runs in the charging controller 30a. The communication link 16a is formed as a low-voltage line. The sensor units 17a, 18a of the charging ports 10a, 11a, the first change-over switch 15a and the control and regulation unit 20a and the switching control device 29a and the charge control device 30a are connected to each other by the low-power line.

In an operating state in which a user of the motor vehicle inserts one of the charging plugs 21a, 22a for charging the energy accumulator into the first charging port 10a, the switching control device 29a detects a contact of the inserted charging plug 21a, 22a in the charging port 10a through the sensor unit 17a, whereby the Switchover control unit 29a, the charging connection 26a of the first charging port 0a and the communication link 16a of the first sensor unit 17a of the first charging port 10a connects to the charging unit 12a and thus activates the first charging port 10a. For this purpose, the changeover control unit 29a controls the first changeover switch 15a and the second changeover switch 19a upon detection of an inserted charging plug 21a, 22a in the first charging connection 10 and thereby connects the first sensor unit 17a of the active first charging connection 10a and the active first charging connection 10a to the output 28a the switching unit 13a. Due to the permanent connection of the charge control device 30a and the inverter 23a to the output 28a of the switching unit 13a, the active first charge connection 10a is electrically connected to the charging unit 12a. In the charging process, the inverter 23 a thus charges the energy store through the active first charging connection 10 a, and the charging control device 30 a checks the charging process. Operation by the first sensor unit 17a of the active first charging port 10a. In this case, the second sensor unit 18a of the second charging connection 11a and the second charging connection 11a are decoupled from the charging unit 12a and thus deactivated. The charging connection of the deactivated second charging connection 11a or the deactivated second charging connection 1a is de-energized.

In an operating state in which the user inserts an additional charging plug 21a, 22a with the charging plug 21a, 22a plugged into the active first charging port 10a, the switching control device 29a deactivates the deactivated second charging port 11a and activates the active first charging port 10a. The charging connection 26a of the deactivated second charging connection 11a or the deactivated second charging connection 11a remains de-energized. The energy store is only charged by the first activated first charging port 10a. The charge control device 30a further communicates only with the sensor unit 17a of the first activated first charging port 10a. The energy store or the charging unit 12a is electrically connected only to the charging port 10a, in which the switching control device 29a has first detected the state parameter formed as the contact of a charging plug 21a, 22a by the sensor system 14a. The charge control device 30a is only electrically connected to the sensor unit 17a or only communicates with the sensor unit 17a associated with the charge connection 10a, in which the changeover control device 29a has first detected the state parameter formed as the contact of a charging plug 21a, 22a by the sensor system 14a.

In an operating state in which the user removes the plugged-in charging plug 21a, 22a from the active first charging port 10a and inserts a charging plug 21a, 22a into the deactivated second charging port 11a, the switching control device 29a detects a contact of the plugged-in charging plug 21a through the sensor unit 18a. 22a in the second charging port 11a, whereby the switching control device 29a connects the charging connection 26a of the second charging port 11a and the communication connection 16a of the second sensor unit of the second charging port 11a to the charging unit 12a, thus activating the second charging port 11a. For this purpose, the switching control unit 29a controls the first changeover switch 15a and the second changeover switch 19a, thereby connecting the second sensor unit 18a of the active second charging terminal 11a and the active second charging terminal 11a to the output 28a of the switching unit 13a. Due to the permanent connection of the charge control device 30a and the inverter 23a at the output 28a of the switching unit 13a, the second charging port 11a is electrically connected to the charging unit 12a. The inverter 23a thus charges the energy This time, the memory is accumulated through the second charging port 11a, and the charge control device 30a communicates with the second sensor unit 18a of the active second charging port 11a. In this case, the first sensor unit 17a of the first charging connection 10a and the first charging connection 10a are decoupled from the charging unit 12a and thus deactivated. The charging connection 26a of the deactivated first charging connection 10a or the deactivated first charging connection 10a is de-energized.

FIG. 2 shows a further exemplary embodiment of the invention. The

The following descriptions are essentially limited to the differences between the exemplary embodiments, it being possible to refer to the description of the other exemplary embodiment, in particular FIG. 1, with regard to components, features and functions that remain the same. To distinguish the

Embodiments is the letter a in the reference numerals of

Embodiment in Figure 1 replaced by the letter b in the reference numerals of the embodiment in Figures 2. With regard to identically designated components, in particular with regard to components having the same reference numerals, reference may in principle also be made to the drawings and / or the description of the other exemplary embodiment, in particular FIG.

FIG. 2 shows a circuit diagram of a second exemplary embodiment of the motor vehicle charging device. The motor vehicle charging device has two spaced-apart charging ports 10b, 11b, which are arranged in parallel and equivalent. The charging terminals 10b, 11b are provided for receiving a charging plug 21b, 22b. For charging an energy storage device via one of the charging connections 10b, 11b, the motor vehicle charging device has a charging unit 12b. The charging unit 12b has an inverter 23b, which is connected to the energy store at an output 25b.

For selective electrical connection of the charging connections 10b, 11b, the motor vehicle charging device has a switching unit 13b. The switching unit 13b is permanently connected to its input 27b by a charging connection 26b with both charging terminals 10b, 1b and by a communication connection 16b permanently connected to a sensor unit 14b, which has two sensor units 17b, 18b.

In contrast to the previous embodiment, the switching unit 13b is integrated in the charging unit 12b. The charging unit 12b and the switching unit 13b form a contiguous unit 31b. An output of the switching unit 13b and an input of the charging unit 12b are arranged in the continuous unit 31b. An input of the contiguous unit 31b corresponds to the input 27b of the switching unit 13b. An output of the contiguous unit 31b corresponds to the output 25b of the charging unit 12b. For selectively switching the electrical connection of the charging connections 10b, 11b, the switching unit 13b or the charging unit 12b with integrated switching unit 13b has a single changeover switch 19b. The switch 19b selectively connects either the charging port 10b or the other charging port 11b to the inverter 23b of the charging unit 12b. The changeover switch 19b is associated with the charging connection 26b. The changeover switch 19b is connected to the inverter 23b.

The charging unit 12b with integrated switching unit 13b has a control and regulation unit 20b. The control and regulation unit 20b is integrated into the charging unit 12b with integrated switching unit 13b. The control unit 20b communicates permanently through the communication link 16b with the sensor unit 17b of the charging port 10b and with the sensor unit 18b of the charging port 11b.

Claims

Patent claims

1. Motor vehicle charging device with at least two charging ports (10a, 11a; 10b, 11b) and with at least one charging unit (12a; 12b), which is intended to provide an energy storage device via one of the two charging ports (10a, 11a; 10b, 11b ) to charge,

marked by

at least one switching unit (13a; 13b), which is intended to electrically connect one of the at least two charging ports (10a, 11a; 10b, 11b) to the charging unit (12a; 12b).

2. Motor vehicle charging device according to claim 1,

characterized in that

the at least two charging ports (10a, 11a; 10b, 11b) are arranged in parallel.

3. Motor vehicle charging device according to claim 1 or 2,

characterized in that

the at least two charging ports (10a, 11a; 10b, 11b) are designed equivalently.

4. Motor vehicle charging device according to one of the preceding claims,

marked by

a sensor system (14a; 14b), which is intended to detect at least one status parameter of the charging connections (10a, 11a; 10b, 11b).

5. Motor vehicle charging device according to one of the preceding claims, characterized in that

the switching unit (13a) has at least one first switching switch (15a), which is intended to switch a communication connection (16a).

6. Motor vehicle charging device according to claims 4 and 5,

characterized in that

the sensor system (14a) has at least two sensor units (17a, 18a) assigned to the charging ports (10a, 11a) and the first switch (15a) is intended to selectively connect one of the at least two sensor units (17a, 18a) at least partially with the Connect charging unit (12a).

7. Motor vehicle charging device at least according to claim 5,

characterized in that

the switching unit (13a) has at least one second switching switch (19a) which is technically coupled to the first switching switch (15a) and is intended to switch a charging connection (26a).

8. Motor vehicle charging device at least according to claim 4,

marked by

a control and/or regulating unit (20a; 20b), which is intended to control the switching unit (13a; 13b) depending on the status parameter of the sensor system (14a; 14b).

9. Motor vehicle charging device according to claim 8,

characterized in that

the control and/or regulating unit (20a; 20b) is intended to independently electrically connect only the charging connection (10a, 11a; 10b, 11b) to the charging unit (12a; 12b), on which a charging plug (21a, 22a; 21 b, 22b) was arranged.

10. Motor vehicle charging device at least according to claim 4,

characterized in that

the sensor system (14a; 14b) has at least one proximity sensor.

1 . Motor vehicle charging device according to one of the preceding claims, characterized in that

the switching unit (13b) is at least partially integrated into the charging unit (12b).

12. Method for a motor vehicle charging device with at least two separately arranged charging ports (10a, 11a; 11b, 12b) and with at least one charging unit (12a; 12b), in which the charging unit (12a; 12b) via one of the two charging ports (10a , 11a; 11 b, 12b) charges an energy storage device, in particular for a motor vehicle charging device according to one of the preceding claims, characterized in that

optionally one of the at least two charging ports (10a, 11a; 11b, 12b) is electrically connected to the charging unit (12a; 12b).

13. Method according to claim 12,

characterized in that

for switching, a status parameter of the charging connections (10a, 11a; 11b, 12b) is detected.