DE102013014997A1 - Charging station for the inductive, stationary charging of at least one electrical energy store of an electric vehicle - Google Patents

Abstract

The invention relates to a charging station (1) for inductive, stationary charging of at least one electrical energy store (14) of an electric vehicle (2), with a charging station parking space (3), in the central area of which a charging primary coil (5) of the inductive charging device is arranged recessed in the floor, and with an associated charging secondary coil (13) of the charging device, which is attached in the floor area of an electric vehicle (2) parked in the parking lot for a charging process. According to the invention, the electric vehicle (2) parked for the charging process or a parked non-electric vehicle is equipped with induction-capable tires (15, 16). In addition to the inductive charging device, the charging station comprises an inductive tire warming-up device, the inductive tire warming-up device consisting of four warm-up primary coils (6, 7, 8, 9) attached in each case in the tire contact area of the four vehicle tires (15, 16) and the warm-up secondary coil each by the a warm-up primary coil (6, 7, 8, 9) associated with tires (15, 16) is formed.

Description

The invention relates to a charging station for inductive, stationary charging of at least one electrical energy store of an electric vehicle according to the preamble of claim 1.

Electric vehicles, especially electric passenger cars are powered by one or more battery-powered electric motors, it being necessary to recharge the batteries regularly. In the simplest case, this is done with a charging cable, with which the electric vehicle is connected to a power outlet of a power supply.

However, there are already known wireless charging stations for an inductive stationary charging an electrical energy storage of an electric vehicle. For example, it is off DE 20 2011 100 062 U1 a charging station known with an inductive charging device having a charging primary coil, which is arranged recessed in the bottom of a charging station parking lot. Furthermore, the charging station comprises an associated charging secondary coil, which is arranged in the vehicle floor panel. For the charging process, an AC line voltage is converted into a high-frequency current, which is fed by means of the RF transformer of primary winding and secondary winding in the electric vehicle. In a further known inductive charging path EP 2 524 834 A1 the secondary circuit is designed as a double dipole loop in the middle floor area of the electric vehicle.

It is well known that tires are relatively hard when cold and therefore extend the braking distance and worsen traction and comfort. In particular, fuel-efficient tires are particularly hard when cold and the above disadvantages are particularly serious.

In racing, it is particularly important to use the optimal driving characteristics and the optimal grip of a tire. It is therefore, for example, off WO 03/103991 A1 It is known to pre-heat tires prior to a wheel change, in particular before a pit stop, to an optimum tire temperature. For this purpose, the wheel with its tires in a closed preheating housing is exposed to electromagnetic energy and preheated to its predetermined optimum tire temperature up to a wheel change.

An inductive preheating of a wheel tire before a vehicle use is also off US 2009/0314407 A1 known. For example, an inductive tire warm-up device may be mounted in a garage, where the tires may be warmed to a parked vehicle. The tires are equipped here by metal rings in the tire sidewalls and by metal inserts in the treads as secondary circuits capable of induction.

It's over Patent Abstracts of Japan, Application no. 031 89 216 A known to heat by means of an inductive heating device by generating eddy currents a vehicle tire, wherein in the tread metal wires are embedded as secondary coils.

The object of the invention is to use the advantages of an optimal tire temperature in conjunction with a charging station for inductive stationary charging an electrical energy storage of an electric vehicle.

This object is achieved in that the parked for charging on a charging station parking lot above a charging primary coil electric vehicle or possibly also a non-electric vehicle is equipped with induction tires. Much of the tires offered on the market which are equipped with passenger vehicles are capable of being induced by stabilizing metal inserts which can act as secondary coils.

According to the invention, the charging station comprises, in addition to the inductive charging device, an inductive tire-warming device which consists of four warm-up primary coils each mounted in the tire contact area of the four vehicle tires. For the warm-up process by induction while the warm-up secondary coils are each formed by the a primary heating coil associated tire. The tire warm-up can be coordinated during the charging process during and / or subsequently. In addition to a charged battery, pre-heated tires with optimum handling characteristics are available.

Preferably, the warm-up primary coils are each sunk under the tire contact patch areas in the ground.

Alternatively, the warm-up primary coils may optionally also be arranged laterally outside next to a tire above the ground.

Since the marginal states of different vehicles may differ, it is proposed in a development for an optimal location and coupling of the respective warm-up primary coil and the associated tire as a warm-up secondary coil, the warm-up primary coils and / or their brackets in the longitudinal and / or transverse direction and / or vertical direction displaceable, so that an optimal induction position with respect to a tire is adjustable.

Such a setting can advantageously be automated, wherein the respective tire position is determined by a position sensor, in particular with a proximity sensor. Subsequently, a predetermined relative position between a warm-up primary coil and an associated tire is adjusted by displacement of the warm-up primary coil with a servomotor.

For an appropriate, optimal tire warm-up, the tire warm-up device may have a temperature control with at least one temperature sensor, which may be approached by a tire, for detecting a tire actual temperature. The temperature sensor is connected to a controller on which an optimum tire temperature can be set as setpoint. With a setpoint-actual deviation below the set optimum tire temperature, the controller regulates the switch-on time and / or the intensity of the induction using a predetermined control algorithm.

Thus, in already warm tires on a parked in the charging station vehicle, the tire warming device is not activated, so that not useless energy is consumed and possibly an unfavorably high tire temperature is reached. Particularly advantageous here, the tire warming can take place in time in conjunction with the charge of an electrical energy storage of an electric vehicle. The tire heating can be made dependent on the time of charging.

Reference to a drawing, the invention will be further explained.

Show it:

1 a top view of a charging station parking lot for an electric vehicle with a charging primary coil and four warm-up primary coils,

2 a side view of the charging station parking lot after 1 with an electric vehicle, and

3 a top view of the charging station parking lot after 2 ,

In 1 is a plan view of a charging station 1 for the inductive, stationary charging of at least one electrical energy store 14 an electric vehicle 2 illustrated with a charging station parking lot 3 whose area is defined by the rectangle 4 is limited. In the middle area of the charging station parking lot 3 is sunk in the ground a charging primary coil 5 an inductive charging device arranged. The charging primary coil 5 is shown only schematically. In the tire contact area for two front tires and two rear tires is also each a warm-up primary coil 6 . 7 . 8th . 9 an inductive tire warming device sunk in the ground. Again, the warm-up primary coils 6 . 7 . 8th . 9 only shown schematically. With the longitudinal arrows 10 and the cross arrows 11 schematically is the possibility of longitudinal and transverse displacement of the warm-up primary coils 6 to 9 located. Next is schematically a respective position sensor 12 as a proximity sensor for finding a suitable tire position of each warm-up primary coil 6 to 9 assigned.

Alternatively to the shown, sunk in the ground position of the warm-up primary coils 6 to 9 If appropriate, the warm-up primary coils can also each be arranged laterally outside next to a tire above the ground (optionally also adjustable in position). An example of such a situation is a warm-up primary coil 6 ' drawn dashed for the rear right vehicle tire.

In 2 is the charging station 1 in a side view with a parked for a charge electric vehicle 2 shown, with a longitudinal section through the bottom plate along the line AA 1 is guided.

The charging secondary coil 13 the charging device for the energy storage as a battery 14 is in the middle floor area of the electric vehicle 2 arranged and thus lies above the charging primary coil 5 , The right front tire 15 and the right rear tire 16 are available as inductive tires and thus as secondary coils each on the warm-up primary coils 6 and 7 , If necessary, these were warm-up primary coils 6 and 7 with the help of their position sensors 12 automatically automates the situation below the footprint of the tires 15 and 16 relocated.

In 3 is again a top view of the charging station 1 with the charging station parking lot 3 and the parked electric vehicle 2 showing the dashed line the position of the charging primary coil 5 and the warm-up primary coils 6 to 9 or the respectively overlying charging secondary coil 13 and the warm-up primary coils 6 to 9 associated tire is shown.

The charging station 1 with the additional tire warming device has the following function: the electric vehicle 2 is used in the usual way for a wireless inductive charging of the battery 14 in the charging station 1 switched off. At the same time or with a time delay and / or tire temperature-dependent, the inductive tire-warming device with the warm-up primary coils 6 to 9 activated, until an optimum tire temperature is reached.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• DE 202011100062 U1 [0003]
• EP 2524834 A1 [0003]
• WO 03/103991 A1 [0005]
• US 2009/0314407 A1 [0006]
• JP 03189216 A [0007]

Claims (7)

Charging station for inductive, stationary charging of at least one electrical energy store ( 14 ) of an electric vehicle ( 2 ), with a charging station parking ( 3 ), in the middle region of a charging primary coil ( 5 ) of the inductive charging device is sunk in the ground, and with an associated charging secondary coil ( 13 ) of the loader in the ground area of a parking lot ( 3 ) for a charge parked Elektrofahrzeus ( 2 ), characterized in that the parked for the charging electric vehicle ( 2 ) or, where appropriate, a parked non-electric vehicle with induction tires ( 15 . 16 ), that the charging station ( 1 ) comprises, in addition to the inductive charging device, an inductive tire-warming device which is activatable independently or during or after a charging process, and in that the inductive tire-warming device comprises four each in the tire-tread region of the four vehicle tires ( 15 . 16 ) mounted warm-up primary coils ( 6 . 7 . 8th . 9 ) and the warm-up secondary coil each by a warm-up primary coil ( 6 . 7 . 8th . 9 ) associated with induction capable tires ( 15 . 16 ) is formed. Charging station according to claim 1, characterized in that a warm-up primary coils ( 6 . 7 . 8th . 9 ) are each mounted recessed under a tire contact patch in the ground. Charging station according to claim 1, characterized in that the warm-up primary coils ( 6 ' ) in each case laterally outside next to a tire ( 16 ) are mounted above the ground. Charging station according to one of claims 1 to 3, characterized in that the warm-up primary coils ( 6 . 7 . 8th . 9 ) and / or their mounting in the longitudinal direction and / or transverse direction and / or vertical direction displaceable and with respect to the respective associated tire for an optimal induction position ( 15 . 16 ) are position adjustable. Loading station according to claim 4, characterized in that the position adjustment is automated, with a position sensor ( 12 ), in particular with a proximity sensor the respective tire position is determined and with a servomotor a predetermined relative position between a warm-up primary coil ( 6 . 7 . 8th . 9 ) and an associated tire ( 15 . 16 ) is set. Loading station according to one of claims 1 to 5, characterized in that the tire warming device has a temperature control with at least one optionally approachable to a tire temperature sensor for detecting a tire actual temperature and a controller with a setpoint specification for an optimal tire temperature, the at a Target / actual deviation below the set optimum tire temperature regulates the switch-on time and / or the intensity of the induction. Charging station according to one of claims 1 to 6, characterized in that the induction-capable tires ( 15 . 16 ) Metal inserts in the tire sidewalls and / or treads.

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