WO2015051876A1

WO2015051876A1 - Method for positioning a vehicle on an inductive charging station

Info

Publication number: WO2015051876A1
Application number: PCT/EP2014/002584
Authority: WO
Inventors: Matthias Kronewitter; Stefan Weis
Original assignee: Daimler Ag
Priority date: 2013-10-11
Filing date: 2014-09-24
Publication date: 2015-04-16
Also published as: DE102013016880A1

Abstract

The invention relates to a method for positioning a vehicle (2) on an inductive charging station (1). According to the invention, when the vehicle (2) approaches a charging station (1), a first wireless communication link (K) is established for a first transfer of data between the vehicle (2) and at least one charging place (1.1, 1.2) of the charging station (1), as soon as the vehicle (2) is in the communication range with the at least one charging place (1.1, 1.2). The position of the vehicle (2) relative to the at least one charging place (1.1, 1.2) is determined by evaluating the transfer of data and the vehicle (2) is manually or automatically guided to the at least one charging place (1.1, 1.2) of the charging station (1) in accordance with the determined position.

Description

Method for positioning a vehicle at an inductive charging station

The invention relates to a method for positioning a vehicle at an inductive charging station according to the features of the preamble of claim 1.

As described in DE 10 2010 063 665 A1, a method for guiding an electric car to a charging position with at least one feed coil is known from the prior art. The electric car is guided such that at least one

Pickup coil of the electric car is positioned over the at least one feed coil without offset to Abnehmerspule for inductive energy transfer between the coils. A radar-based guidance of the electric car with a measurement of a distance and two angles between the electric car and the charging position makes it possible to locate the electric car located at a greater distance from the charging position. Determined position data serve as the basis for a journey of the electric car to the charging station and for a mutual positioning of the at least one charging and the at least one supply coil without mutual offset.

The invention is based on the object, a comparison with the prior art improved method for positioning a vehicle on an inductive

Indicate charging station.

The object is achieved by a method for positioning a vehicle at an inductive charging station with the features of claim 1.

Advantageous embodiments of the invention are the subject of the dependent claims.

In a method for positioning a vehicle at an inductive charging station, according to the invention, when the vehicle approaches the charging station, a first wireless communication connection is established for a first data transmission between the vehicle and at least one charging station of the charging station as soon as the vehicle is stationary Vehicle is in communication range to the at least one loading place, wherein an evaluation of the data transmission, a position of the vehicle is determined relative to at least one loading place and the vehicle is guided manually or automatically depending on the determined position on the at least one loading place of the charging station.

In an inductive charging such, for example, as a hybrid or

An electric vehicle trained vehicle charging is controlled and / or regulated, for example via a wireless charging communication link between the vehicle and the loading place. For this purpose, an unambiguous assignment of the vehicle to be loaded to the loading space is required. If a charging station has, for example, two or more charging stations next to one another, there is a risk that the vehicle driver will position the vehicle on one of the charging stations, but the vehicle will establish a wireless charging communication link to another of the charging stations. Then, an inductive energy transfer for charging at least one electrical energy storage of the vehicle, such as a traction battery of the vehicle, not possible. By means of the method according to the invention, this is avoided, since the method enables an exact positioning of the vehicle on the respective loading place, with which the wireless charging communication connection is also established.

Embodiments of the invention are explained in more detail below with reference to drawings.

Showing:

Fig. 1 shows schematically an approach of a vehicle to a first

Embodiment of a charging station,

2 is a schematic view of an approach of a vehicle to a first loading bay of a second embodiment of a charging station;

3 shows schematically an approach of a vehicle to a second loading space of a second embodiment of a charging station, and 4 schematically shows a vehicle before driving onto a second loading location of a second embodiment of a charging station.

Corresponding parts are provided in all figures with the same reference numerals.

FIG. 1 shows a non-inventive first embodiment of an inductive charging station 1. A second embodiment of such an inductive charging station 1 is shown in FIGS. 2 to 4 as an exemplary embodiment according to the invention. In this case, the inductive charging station 1 has in each case two charging stations 1.1, 1 .2 in the examples illustrated here. In further, not shown examples, more or less loading places 1.1, 1.2 are possible.

The charging stations 1.1, 1 .2 each have a feed coil S, also referred to as primary coil. A vehicle to be loaded 2 has a not shown here

Pickup on, also referred to as secondary coil. To carry out a

Charging is the vehicle 2 on one of the two loading stations 1.1, 1.2 to position such that an inductive energy transfer from the feed coil S of the respective loading place 1.1, 1.2 is made possible on the pickup coil of the vehicle 2. In this way, an electrical energy storage of the vehicle 2 can be charged. Expediently, the vehicle 2 is an electric vehicle or a hybrid vehicle, and the energy store to be charged in this way is designed as a traction battery of the vehicle 2.

In FIG. 1, the vehicle 2 approaches the inductive charging station 1 with the several charging stations 1.1, 1.2, in the example shown here with two charging stations 1.1, 1.2. To carry out the charging process, first a wireless

Charging communication link L between the vehicle 2 and one of

Loading stations 1.1, 1.2 constructed, over which the charging process is controlled and / or regulated. This wireless charging communication connection L is expediently designed as a radio communication connection, preferably as a WLAN connection. However, in the example shown in FIG. 1, it can not be ensured that a vehicle driver with his vehicle 2 drives those loading station 1 .1, 1.2, with which the charging communication link L is first established. Thus, in the example illustrated in FIG. 1, the charging communication link L is set up with the first charging station 1 .1. The driver now controls his vehicle 2 in the direction of the second loading station 1.2, it may cause a malfunction of a

Positioning algorithm come and by positioning the vehicle 2 on the second loading space 1.2, it can not be loaded.

In order to prevent this, in a method based on FIGS. 2 to 4 for positioning the vehicle 2 at the inductive charging station 1 when approaching the vehicle 2 to the charging station 1, a first wireless communication link K for a first data transmission between the vehicle 2 and at least one

Ladeplatz 1.1, 1.2 of the charging station 1 constructed as soon as the vehicle 2 in

Communication range to the at least one loading place 1.1, 1.2 is located. For this purpose, a keyless access device of the vehicle 2 is preferably used, also referred to as Keyless-Go system.

To make this possible, the charging stations 1.1, 1.2 each have a compatible transmitting and / or receiving unit 3, 4. These send and / or

Receiving units 3, 4 are each analogous to a key unit of such keyless-go system called keyless entry device.

Preferably, the transmitting and / or receiving units 3, 4 each formed as a so-called 3D coil or each have such on, d. H. they each have one in the x-direction, one in the y-direction and one in the z-direction of one

three-dimensional coordinate system aligned transmitting and / or

Receiving antenna on. The keyless-go system called keyless

Access device of the vehicle 2 is thus used for locating the transmitting and / or receiving unit 3, 4 of the respective loading place 1.1, 1.2. This makes it possible to determine a distance of the vehicle 2 to the respective loading point 1.1, 1.2 and finally to ensure a clear assignment to the respective loading point 1.1, 1.2, on which the vehicle 2 is positioned.

By an evaluation of the data transfer via this first

Communication link K, a position of the vehicle 2 is determined relative to the respective loading space 1 .1, 1.2 and the vehicle 2 is guided manually or automatically depending on the determined position to one of the loading stations 1.1, 1.2 of the charging station 1. This can be done by instructions to the driver and / or by controlling and / or regulating a steering device and / or a drive train and / or a braking device of the vehicle 2. For this purpose, when the vehicle 2 approaches the charging station 1 by means of the keyless entry system of the vehicle 2, the first communication link K with a low-frequency channel LF and a high-frequency channel HF is established between one of the charging stations 1.1, 1.2 and the vehicle 2 as soon as the vehicle 2 is in communication range to the respective loading place 1.1, 1.2. The low frequency channel LF is also referred to as LF channel or long wave channel. The high frequency channel HF is also referred to as RF channel and has, for example, a frequency of 433 MHz.

The vehicle 2 and the respective loading place 1.1, 1.2 communicate via the

Low frequency channel LF and the high frequency channel HF with each other, wherein the

Ladeplatz 1.1, 1.2 via the high frequency channel HF its identification code and a determined on the low frequency channel LF field strength, d. H. an LF signal strength transmitted to the vehicle 2. From the field strength, the vehicle 2 determines its distance to the respective loading place 1.1, 1.2, d. H. it evaluates the position of its transmitting and / or receiving unit 3, 4 relative to the vehicle 2 via the field strength. The

Identification identifier is composed, for example, of a WLAN SSID and a MAC address of the respective charging station 1.1, 1.2.

In the example shown here, in which the charging station 1 has two charging stations 1.1 1.2, this process is carried out at a sufficient approximation to the respective loading point 1.1, 1.2 for each loading space 1.1, 1.2. Ie. The vehicle 2 initially approaches the first loading place 1.1, so that this process is first carried out with the first loading place 1.1, as shown in FIG. In this case, when approaching the vehicle 2 to the charging station 1 by means of Keyless-Go system designed keyless access device of the vehicle 2, the first

Communication link K with the low frequency channel LF and the

High-frequency channel HF first between the first loading place 1.1 and the

Vehicle 2 constructed as soon as the vehicle 2 is in communication range to the first loading place 1.1. The vehicle 2 and the first loading place 1.1

communicate via the low-frequency channel LF and the Hochfrequenzkana! HF with each other, wherein the first loading station 1.1 via the high-frequency channel HF its identification code and the determined on the low-frequency channel LF field strength, ie the LF signal strength, transmitted to the vehicle 2. From the field strength, the vehicle 2 determines its distance to the first loading place 1.1, ie it evaluates the field strength the position of the first transmitting and / or receiving unit 3 of the first loading station 1.1 relative to the vehicle 2.

Subsequently, the vehicle 2 also approaches the second loading station 1.2, so that this process is carried out with a sufficient approach of the vehicle 2 to the second loading station 1 .2 also with this second loading station 1.2, as shown in FIG. Ie. it is at an approach of the vehicle 2 to the second loading station 1.2 of the charging station 1 by means of Keyless-Go system designed keyless entry device of the vehicle 2, the first

Communication link K with the low frequency channel LF and the

High-frequency channel HF between the second loading station 1.2 and the vehicle 2 constructed as soon as the vehicle 2 is in communication range to the second loading station 1.2. The vehicle 2 and the second loading station 1.2 communicate with each other via the low-frequency channel LF and the high-frequency channel HF, the second loading station 1.2 via the high-frequency channel HF its identification code and the determined on the low-frequency channel LF field strength, d. H. the LF signal strength transmitted to the vehicle 2. From the field strength, the vehicle 2 determines its distance to the second loading place 1.2, d. H. it evaluates the position of the second transmitting and / or receiving unit 4 of the second loading station 1.2 relative to the vehicle 2 via the field strength.

Has, as shown in Figure 4, the vehicle 2 one of the transmitting and / or

Receiving units 3, 4 of the charging stations 1.2, 1.1, here the second transmitting and / or receiving unit 4 of the second loading station 1.2, so strongly approximated that a positioning of the vehicle 2 on the other loading place 1.1, 1.2 can be excluded, the wireless charging communication connection L in the form of

WLAN connection to this charging station 1.2, 1.1 with the identification tag transmitted from this charging station 1 .2, 1.1. In the example shown here, this is the case for the second loading station 1.2, as shown in FIG. Ie. it is by means of the identification identifier of the second loading station 1.2, the wireless

Charging communication link L between the vehicle 2 and the second

Ladeplatz 1.2 constructed as soon as the second loading space has been identified by the distance determination 1.2 clear as driven by the vehicle 2. If the wireless charging communication connection L is not established automatically, because, for example, the SSID of the respective charging station 1.2, 1.1, here the second

Ladeplatzes 1.2, the vehicle 2 is not known because, for example, in the vehicle 2 no corresponding PIN code is stored, so is the wireless

Charging communication connection L is conveniently started by a manual interaction. For this purpose, the driver is prompted for example to enter a so-called access PIN.

About this wireless charging communication link L driving commands for fine positioning of the vehicle 2 are now transmitted to the vehicle 2 by instructions to the driver and / or by the control and / or regulation of

Steering device and / or the drive train and / or the braking device of the vehicle 2 so exactly on this loading space 1.2, 1.1 of the charging station 1, here on the second loading space 1.2, to lead that an inductive energy transfer to the vehicle 2 is made possible.

By guiding the vehicle 2 via the control and / or regulation of

Steering device and / or the drive train and / or the braking device of the vehicle 2, this fine positioning of the vehicle 2 is carried out automatically by autonomous driving or at least partially autonomous driving, d. H. the vehicle 2 runs completely independently or the driver is guided by this control and / or regulation to corresponding actuations of the steering device and / or the drive train and / or the braking device of the vehicle 2.

Alternatively or additionally, the instructions may be output to the vehicle driver via at least one visual and / or audible and / or haptic output unit so as to give instructions to the vehicle driver on how to guide the vehicle 2 in order to position it accurately. This optical and / or acoustic and / or haptic output unit can be located at the respective loading point 1.1, 1.2 or in the vehicle 2, or both of the respective

Ladeplatz 1.1, 1.2 and the vehicle 2 each have an optical and / or acoustic and / or haptic output unit.

The method thus enables the exact positioning of the vehicle 2 on a respective loading place 1.1, 1.2 of the loading device 2 and the unique assignment of wireless charging communication connection L to the respective loading place 1.1, 1.2, ie the connection of the vehicle 2 with the respective loading place 1.1, 1.2 associated wireless charging communication connection L on the unique

Identification tag. As a result, positioning of the vehicle 2 on a wrong, for example, adjacent loading space 1.1, 1.2 is avoided. This can be done, for example, from a distance of the vehicle 2 of less than five meters to the charging station 1. On the vehicle side, preferably no additional device components are required for this because already existing transmission and / or

Reception antennas of Keyless-Go system trained keyless

Access device of the vehicle 2 can be used.

Daimler AG

LIST OF REFERENCE NUMBERS

1 charging station

1.1 first loading place

1.2 second loading place

2 vehicle

3 first transmitting and / or receiving unit

4 second transmitting and / or receiving unit

K first wireless communication connection

L wireless charging communication link

5 feed coil

LF low frequency channel

RF high frequency channel

Claims

Daimler AG

claims

Method for positioning a vehicle (2) on an inductive

Charging station (1),

characterized in that

when a convergence of the vehicle (2) to the charging station (1), a first wireless communication link (K) for a first data transmission between the vehicle (2) and at least one charging station (1.1, 1.2) of the charging station (1) is established as soon as the vehicle (2) is in communication range with the at least one charging station (1.1, 1.2), wherein an evaluation of the data transmission determines a position of the vehicle (2) relative to the at least one charging station (1.1, 1.2) and the vehicle (2) depending on the determined position manually or automatically on the at least one

Loading station (1.1, 1.2) of the charging station (1) is guided.

Method according to claim 1,

characterized in that

the guidance of the vehicle (2) on the at least one loading place (1.1, 1.2) is carried out by instructions to a driver and / or by a control and / or regulation of a steering device and / or a drive train and / or a braking device of the vehicle (2) ,

Method according to claim 1 or 2,

characterized in that

the first wireless communication link (K) between a keyless access device of the vehicle (2) and a compatible transmitting and / or receiving unit (3, 4) of the at least one loading place (1.1, 1.2) is constructed. Method according to one of claims 1 to 3,

characterized in that

the vehicle (2) and the at least one loading place (1.1, 1.2) via a

Low-frequency channel (LF) and a high-frequency channel (HF) communicate with each other, the charging station (1.1, 1.2) via the high-frequency channel (HF) its identification code and on the low-frequency channel (LF) field strength transmitted to the vehicle (2), wherein the vehicle (2) determined from the field strength its distance to the loading place (1.1, 1.2).

Method according to claim 4,

characterized in that

by means of the identification code of the charging station (1.1, 1.2) a wireless charging communication connection (L) between the vehicle (2) and the

Loading station (1.1, 1.2) is constructed as soon as the loading space (1.1, 1.2) on the distance determination clearly as the vehicle (2) controlled

Ladeplatz (1.1, 1.2) has been identified, using this wireless

Loading communication link (L) driving commands for a fine positioning of the vehicle (2) are transmitted to the vehicle (2) by instructions to the driver and / or by the control and / or regulation of

Guide the steering device and / or the drive train and / or the braking device of the vehicle (2) so exactly on the at least one loading place (1.1, 1.2) of the charging station (1) that an inductive energy transfer to the

Vehicle (2) is enabled.

Method according to one of claims 2 to 5,

characterized in that

the instructions are issued to the vehicle driver via at least one optical and / or acoustic and / or haptic output unit.

Method according to claim 5 or 6,

characterized in that

the wireless charging communication link (L) is started by a manual interaction if not automatically established.

8. The method according to any one of the preceding claims,

characterized in that

at a plurality of charging stations (1.1, 1.2) of the charging station (1) to each of the charging stations (1.1, 1.2) in each case a first wireless communication link (K) for a first data transmission between the vehicle (2) and the respective charging station (1.1, 1.2 ) of the charging station (1) is established as soon as the

Vehicle (2) is in communication range to the respective loading place (1.1, 1.2), wherein by an evaluation of the respective first data transmission, a position of the vehicle (2) relative to the respective loading place (1.1, 1.2) is determined and the vehicle (2) in Depending on the determined position manually or automatically to one of the charging points (1.1, 1.2) of the charging station (1) is performed.