DE102019131086A1 - Charging system for electric or hybrid vehicles with at least one rollable charging mat - Google Patents

Abstract

The present invention relates to a charging system (10) for electric or hybrid vehicles (11) comprising at least one charging mat (12) which is set up to charge at least one electric or hybrid vehicle (11), the charging system (10) being a conductive charging system is set up, wherein the loading mat (12) is set up and designed so that it can be rolled up.

Description

The present invention relates to a charging system for electric or hybrid vehicles comprising at least one charging mat which is set up to charge at least one electric or hybrid vehicle.

Various systems are currently being developed for the automatic charging of electric and hybrid vehicles. There are systems that establish contact with the vehicle underbody. These systems usually work either with high voltage or with protective extra-low voltage. These systems also include an on-board infrastructure and a permanently installed ground unit. The ground unit is usually designed as a "on the ground" or "in the ground" unit.

Thus, charging systems for electric and hybrid vehicles are already known in the prior art.

For example, from the document DE 10 2012 216 660 A1 a method for positioning or selecting an inductor and associated devices are known. The method is used for inductive charging of a traction battery of a motor vehicle with a roll-out device that is positioned under the vehicle for inductive charging.

From the document DE 10 2014 005 732 A1 a charging coupling device for inductive charging of an electrical energy store of a motor vehicle, a charging arrangement and methods are known. The charging coupling device has a charging mat which is brought from a stowed position into a use position by means of an adjusting device.

From the document DE 10 2018 105 624 A1 an active suspension for inductive charging is known. A vehicle is inductively charged via a charging mat and adjusted to a target charging height by means of a variable suspension before the charging process.

The charging systems known in the prior art are each permanently installed. As a result, the desired installation space or cargo space may no longer be available. This can be the case, for example, if the charging system is permanently installed on the floor of parking garages with prefabricated ceilings. A customer's permanent installation of a charging system on the ground can also lead to complaints, for example, since these permanently installed charging systems can be obstacles or trip hazards.

It is therefore the object of the present invention to provide a flexible and space-saving charging device for electric and hybrid vehicles.

This object is achieved by a charging system with the features of claim 1. Advantageous developments and designs are the subject of the description and description of the figures.

The subject matter of the present invention is a charging system for electric or hybrid vehicles comprising at least one charging mat which is set up to charge at least one electric or hybrid vehicle.

According to the invention, the charging system is set up as a conductive charging system, the charging mat being set up and designed so that it can be rolled up. This offers the advantage that no complex floor installation, such as in reinforced concrete, is necessary. The charging system is set up to charge the electric or hybrid vehicle via an electrical connection. As a rule, the charging system is set up to receive a charging device of an electric or hybrid vehicle or to form a coupling with a charging device. The charging mat is usually flexible, and the charging mat can usually be rolled up into a housing.

This offers the advantage that an installation space or charging area that has to be provided for the charging system is released if the installation space or charging area is not occupied by an electric or hybrid vehicle. As a result, the charging system does not become a tripping hazard or does not occupy the installation space or loading space when it is not in use. By rolling up the charging mat in a housing, the charging mat is also protected from external influences.

As a rule, the charging system is set up to automatically roll out the charging mat from the housing when an electric or hybrid vehicle approaches. As a rule, the loading mat has a width which is dimensioned such that it can be rolled out under different types of electric or hybrid vehicles. Typically, the width of the loading mat is between 300 mm and 1450 mm, in particular between 350 mm and 1400 mm.

In one embodiment, the charging mat has at least one reinforcement area, at least one self-guiding bearing being arranged in the at least one reinforcing area, the charging system being set up to roll out the loading mat over the at least one self-guiding bearing.

As a rule, a respective reinforcement area is designed as a guide and positioning rail. The self-governing camp is in the Usually set up as a slide bearing, the self-guiding slide bearing being driven or controlled as a rule by an electric motor during a roll-out or roll-in process. The charging mat is thus designed to be able to be rolled out under an electric or hybrid vehicle with the help of the electric motor via the at least one slide bearing arranged in the at least one reinforcement area or on the at least one guide and positioning rail.

The electric motor is typically designed to be integrated into the charging system. Optionally, the electric motor can be integrated into the charging mat. In an alternative embodiment, the electric motor is designed as an external electric motor. By designing the loading mat with the guide and positioning rails as well as with the self-guiding slide bearings, it is not necessary to mount additional guide rails on the floor of a loading area. This leaves the installation space or the loading area free for alternative uses.

In an alternative embodiment, the loading mat is designed to be foldable out of the housing. The charging mat generally has at least one reinforcement area or at least one guide and positioning rail, which comprises at least two sections, a first section being designed to be movable or foldable to a second section.

In a further development, the charging system comprises at least one electric motor and at least one communication-capable control device, the control device being set up to control an unrolling or rolling-in process of the charging mat with the aid of the electric motor. The roll-out length of the loading mat is individually adjustable. As a rule, the roll-out length of the charging mat is at least a quarter of the length of an electric or hybrid vehicle to be charged. The roll-out length is typically between 1200 mm and 2500 mm. In an advantageous embodiment, the roll-out length is between 1300 mm and 1700 mm, in particular between 1400 mm and 1500 mm, particularly preferably 1500 mm.

The control unit is set up to automatically roll out the charging mat under an electric or hybrid vehicle to be charged with the help of the electric motor. Due to the individual roll-out length of the charging mat, the charging system can be used universally for different vehicle types. In addition, the individual roll-out length allows different charging positions to be implemented for charging the electric or hybrid vehicle.

Due to the motor forces provided by the electric motor and the self-guiding slide bearing, the loading mat can be developed to be very robust against dirt, since the friction on the underside of the floor can be neglected due to the slide bearing. Thus, the nature of the soil is only of secondary importance in the design. Due to the motor power and the low sliding friction, usually only a blockage protection in the form of a maximum unrolling length or a maximum unwinding time needs to be implemented for the system. This has the advantage that further mechanisms are not necessary.

In a further development, the control device is set up to start or end a charging process. As a rule, the control device is set up to start a rolling process of the charging mat out of the housing when an electric or hybrid vehicle approaches or when it reaches an end-of-parking position, the control unit being set up to start the charging process automatically. As a rule, the control device is set up to be WiFi-enabled. Usually the charging system is connected to a power source.

The control device is optionally set up to be able to be coupled to a wallbox or to communicate with a wallbox in a wired or wireless manner. This has the advantage that a wallbox can serve as a power source for the control unit. The control unit enables fully automated charging of an electric or hybrid vehicle. The control device can be set up to charge an electric or hybrid vehicle with direct current or alternating current. The control device is optionally set up to start or begin charging an electric or hybrid vehicle as a function of the available current communicated by a wallbox. The control unit can optionally be set up to charge an electric or hybrid vehicle based on the current available. The control device is usually set up to communicate or transmit status feedback to the wallbox about the charging readiness of the charging mat. Furthermore, the control device is set up to transmit position information, in particular a maximum roll-out length or a vehicle contact, to the wallbox. The charging system is typically set up to signal readiness for charging to the vehicle. The original charging communication according to ISO15118 usually remains unchanged.

In one embodiment, the control device is set up to automatically start a charging process when a charging mat is rolled out. As a rule, the control device is set up to automatically start charging the electric or hybrid vehicle when the charging mat has finished rolling out under the electric or hybrid vehicle. In an alternative embodiment, the control device is set up to issue a Request activation of the charging process by a vehicle user or tanker.

In a further embodiment, the charging mat has at least one charging contact, the charging contact being set up to establish an electrical connection to a charging device of the at least one electric or hybrid vehicle. The at least one charging contact is usually designed as a metallic contact surface. As a rule, the at least one charging contact is dimensioned in such a way that the charging mat can be rolled up or unrolled without any problems.

As a rule, the charging mat comprises at least two charging contacts, at least one of the charging contacts establishing an electrical connection to the charging device of the at least one electric or hybrid vehicle or being set up to accommodate the charging device of an electric or hybrid vehicle. The charging device of the at least one electric or hybrid vehicle can optionally be a recessed connector which is formed in the underbody of the electric or vehicle and which can be lowered fully automatically onto the at least one charging contact of the charging mat.

In a development, the at least one charging contact is flat or punctiform, the at least one charging contact being made from a conductive material. As a rule, the charging contacts at least partially comprise copper. Thus, the charging contacts are usually made of copper. Alternatively, the charging contacts are made from a different conductive material. The design of the charging contacts from a conductive or conductive material ensures the transmission of electrical energy from the charging system via the charging device to the electric or hybrid vehicle.

In a further development, the control device is set up to control or switch the at least one charging contact as a function of a charging current. This offers the advantage that the at least one electrically conductive charging contact can be designed differently for different charging options.

As a rule, the at least one electrically conductive charging contact is set up to be blocked when the charging system is used with high voltage. The at least one charging contact must first be activated for use with high voltage. As a rule, when the charging mat is used with high voltage, the control device is set up to request activation by a user.

If a charging system in the area of protective extra-low voltage or low voltage is used, the control device is usually set up to output a corresponding voltage directly to the charging contacts. For this purpose, for example, one side can be designed as a positive potential (plus) and another side as a ground plane (minus).

In one embodiment, the charging mat is set up and designed to be able to be arranged on a wall, in particular in a garage, or on the front of a parking lot. For this purpose, the device can be mounted on the wall in a garage or at a point at the front of a parking lot, both on the floor and on an elevation. Wall mounting in particular eliminates the risk of tripping and obstacles on the floor.

In a further development, the loading mat is set up as a vehicle underbody. The charging mat is optionally set up as a vehicle underbody, which can optionally be attached to an underside of an electric or hybrid vehicle. If the charging mat is configured as a vehicle underbody, the charging system is generally set up to automatically establish an electrical connection to a wallbox when a charging park position is reached and to automatically charge the electric or hybrid vehicle.

• 1 eine Draufsicht auf eine Ausführungsform eines erfindungsgemäßen Ladensystems,
• 2 eine Seitenansicht auf eine Ausführungsform des erfindungsgemäßen Ladesystems.

The invention is shown schematically on the basis of embodiments in the drawing and is described further with reference to the drawing, the same components being identified by the same reference numerals. It shows:

• 1 a plan view of an embodiment of a shop system according to the invention,
• 2 a side view of an embodiment of the charging system according to the invention.

1 shows a plan view of an embodiment of a charging system according to the invention 10 . Here is the charging system 10 shown this is a loading mat 12th as well as an electric motor 15th and a control unit 16 includes. In the present embodiment, the charging system is 10 on a front 19th a parking lot 20th arranged.

The loading mat 12th comprises two reinforcement areas in the present embodiment 13a , 13b , being in a respective gain area 13a , 13b each a self-guided warehouse 14a , 14b , usually a plain bearing, is formed. In the present embodiment, the self-guiding slide bearing 14a , 14b each at the end of the loading mat 12th or at the end of the respective reinforcement area 13a , 13b educated. Alternatively, a respective self-guiding slide bearing 14a , 14b in another area of a respective one of the gain area 13a , 13b be trained.

The reinforcement areas 13a , 13b are designed in the present embodiment as guide and positioning rails. In alternative configurations, the reinforcement areas 13a , 13b be formed at least in some areas. The reinforcement areas 13a , 13b are therefore usually reinforced by the guide and positioning rails.

The loading mat 12th has charging contacts 17th that are set up to establish an electrical connection. The charging contacts 17 are set up to establish an electrical connection to a charging device of the at least one electric or hybrid vehicle. The charging contacts 17th are designed as metallic contact surfaces.

1 shows the charging system 10 with the loading mat rolled out 12th . The control unit 16 is set up with the help of the electric motor 15th , the loading mat that has already been rolled out in the present embodiment 12th to be rolled up or retrieved after a charging process. In particular, the control unit is 16 set up the loading mat 12th in a housing 23 to catch up.

The electric motor 15th is with the help of the control unit 16 controllable. Usually the electric motor is 15th into the charging system 10 integrated trained. In alternative configurations, the electric motor 15th be trained externally.

The control unit 16 is set up at least one charging contact 17th to control or switch depending on a charging current. In the present embodiment, the charging system 10 used with a protective extra-low voltage. Will the charging system 10 The control unit is used in the area of safety extra-low voltage or at low voltage 16 usually set up a corresponding voltage directly on the charging contacts 17th to spend. One side of the loading mat, for example, can do this 12th as a positive potential (plus) and another side of the charging mat 12th be designed as a ground plane (minus).

2 shows a side view of an embodiment of the charging system according to the invention 10 . In the present embodiment is the charging system according to the invention 10 in a garage on a front 19th a parking lot 20th on a wall 18th educated.

The charging system according to the invention 10 includes the loading mat 12th as well as the control unit 16 . The loading mat 12th is in the case 23 rollable. The loading mat 12th comprises at least one reinforcement area 13a as well as at least one self-guided warehouse 14a , which is in the area of the reinforcement area 13a is trained. The control unit 16 is set up with the help of an electric motor - not shown - the charging mat 12th via the self-guided warehouse 14a under an electric or hybrid vehicle 11 to roll up. The axis of rotation is also shown 21 the loading mat 12th to which the loading mat 12th can be rolled up or unrolled.

The control unit 16 is WiFi capable and set up, with a wallbox 22nd to be connectable. This is a wallbox 22nd as a power source for the control unit 16 usable. The control unit is optional 16 set up a charge of the electric or hybrid vehicle 11 depending on one through the wallbox 22nd reported available current to start or to begin. The control unit is optional 16 set up the electric or hybrid vehicle 11 based on the available current. The control unit is via the WiFi connection 16 set up, both with the wallbox 22nd as well as to communicate with other - not shown - mobile devices.

The control unit 16 is set up when the loading mat is fully rolled out 12th under the electric or hybrid vehicle 11 to start the charging process automatically. The control unit can 16 the electric or hybrid vehicle 11 charge with direct current or alternating current.

When using the charging system 10 for charging the electric or hybrid vehicle 11 the control unit is high-voltage 16 usually set up before using the charging mat 12th to request activation by a user with high voltage. As a result, a voltage is not output directly to the charging contacts - not shown - but only after it has been released by the user. When using the charging system 10 for charging the electric or hybrid vehicle 11 with a safety extra-low voltage is the control unit 16 usually set up to output a corresponding voltage directly to the charging contacts (not shown).

List of reference symbols

10

Charging system

11

Electric or hybrid vehicle

12th

Loading mat

13a, 13b

Reinforcement area

14a, 14b

self-guided warehouse

15th

Electric motor

16

Control unit

17th

Charging contact

18th

Wall garage

19th

Front parking lot

20th

parking spot

21

Axis of rotation

22nd

Wallbox

23

casing

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102012216660 A1 [0004]
• DE 102014005732 A1 [0005]
• DE 102018105624 A1 [0006]

Claims (10)

Charging system (10) for electric or hybrid vehicles (11) comprising at least one charging mat (12) which is set up to charge at least one electric or hybrid vehicle (11), characterized in that the charging system (10) is set up as a conductive charging system , wherein the loading mat (12) is set up and designed so that it can be rolled up. Charging system (10) Claim 1 , characterized in that the loading mat (12) has at least one reinforcement area (13a, 13b), with at least one self-guiding bearing (14a, 14b) being arranged in the at least one reinforcement area (13a, 13b), the charging system (10) being set up is to roll out the loading mat (12) over the at least one self-guiding bearing (14a, 14b). Charging system (10) according to one of the preceding claims, characterized in that the charging system (10) comprises at least one electric motor (15) and at least one communication-capable control device (16), the control device (16) being set up with the aid of the electric motor (15) ) to control a roll-out or roll-in process of the loading mat (12). Charging system (10) according to one of the preceding claims, characterized in that the control device (16) is set up to start or end a charging process. Loading mat (10) according to one of the preceding claims, characterized in that the control device is set up to automatically start a charging process when a loading mat (12) is rolled out. Charging system (10) according to one of the preceding claims, characterized in that the charging mat (12) has at least one charging contact (17), the charging contact (17) being set up to provide an electrical connection to a charging device of the at least one electric or hybrid vehicle ( 11). Charging system (10) Claim 6 , characterized in that the at least one charging contact (17) is flat or punctiform, the at least one charging contact (17) being made from a conductive material. Loading system (10) according to one of the Claims 6 or 7th , characterized in that the control device (16) is set up to control or switch the at least one charging contact (17) as a function of a charging current. Charging system (10) according to one of the preceding claims, characterized in that the charging mat (10) is set up and designed to be able to be arranged on a wall (18), in particular in a garage, or on the front of a parking lot (19). Loading system (10) according to one of the preceding claims, characterized in that the loading mat (12) is set up as a vehicle underbody.

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