DE102011118287A1 - Mobile induction charging device for horizontal wireless charging and/or discharging of high-volt battery of e.g. passenger car, has energy transmission unit comprising contour with positioning course that changes charging coverage - Google Patents

Abstract

The device (11) has an inductive energy transmission unit (13) comprising an outer contour (14) and contacting an energy receiving unit (15) for charging and/or discharging a motor vehicle battery (12), where the device is arranged in a front side (28) of a motor vehicle (26). The outer contour comprises a positioning course (16) that changes charging coverage by cooperating with an outer contour of the energy receiving unit. A resetting unit (23) is provided for pressing the energy transmission unit against the energy receiving unit.

Description

The invention relates to an induction charging device according to the preamble of claim 1.

From the DE 10 2009 023 409 A1 is already an induction charging device to a wireless horizontal loading of an electrical motor vehicle battery, with an inductive energy transmission unit, which has an outer contour and is intended to contact the horizontal charge of the motor vehicle battery with the outer contour of a corresponding inductive energy receiving unit known.

The invention is in particular the object to simplify setting a charge coverage for wireless charging and / or discharging. This object is achieved according to the invention by the features of claim 1. Further embodiments emerge from the subclaims.

The invention is based on an induction charging device for a wireless charging and / or discharging of an electrical motor vehicle battery, in particular for a wireless horizontal charging and / or discharging, with an inductive energy transmission and / or energy receiving unit, which has an outer contour and is provided for Charging and / or discharging the motor vehicle battery with the outer contour to contact a corresponding inductive energy transmission and / or energy receiving unit.

It is proposed that the outer contour has a positioning profile which is intended to change a charge overlap by interacting with an outer contour of the corresponding energy end and / or energy receiving unit. As a result, the energy end and / or energy receiving unit can be brought to the exact charge coverage particularly quickly and safely, whereby an efficiency of wireless charging and / or discharging, in particular horizontal loading and / or unloading of the motor vehicle battery can be set particularly advantageously to an optimum. It may further be dispensed with a need for accurate positioning of a motor vehicle accumulator having motor vehicle. In addition, the charge coverage without complicated control and / or regulation and without a dedicated sensor to be set to the optimum, whereby a purely mechanical positioning of the energy end and / or energy receiving unit can be realized to an optimum. As a result, the setting of the charge coverage for wireless charging and / or discharging, in particular for horizontal charging and / or discharging, can be simplified and thus customer satisfaction can be increased.

An "induction charging device" should in particular be understood to mean a device which uses a principle of inductive energy transfer for wireless charging and / or discharging, in particular for wireless horizontal charging and / or discharging of the motor vehicle accumulator. Advantageously, two induction charging devices are necessary for charging and / or discharging, in particular for horizontal charging and / or discharging, wherein one induction charging device is electrically connected to a public power grid and the other induction charging device is electrically connected to the motor vehicle accumulator. The induction charging device connected to the public power grid is preferably as a stationary, d. H. stationary induction charging device and the induction charging device connected to the motor vehicle accumulator as a mobile, d. H. vehicle-mounted induction charging device formed. Preferably, the induction charging device comprises an inductive energy transmission unit, which is intended to be connected to charge and / or discharge, in particular horizontal loading and / or unloading wirelessly connected to an externally disposed inductive energy receiving unit, and / or an inductive energy receiving unit, the is provided, for charging and / or discharging, in particular for horizontal loading and / or unloading wirelessly to be connected to an externally arranged, inductive energy transmission unit to transmit energy. An "externally arranged energy transmission and / or energy reception unit" should be understood in particular to mean an energy transmission and / or energy reception unit which is associated with another induction charging device with regard to the induction charging device considered. The corresponding inductive energy transmission and / or energy reception unit is preferably designed as the externally arranged energy transmission and / or energy reception unit. An "induction" is to be understood in particular as an electromagnetic induction.

A "horizontal loading" should in particular be understood to mean a charging process in which the energy-transmitting and / or energy-receiving unit and the externally arranged energy-transmitting and / or energy-receiving unit are arranged horizontally relative to one another. A "horizontal discharge" is to be understood in particular as a discharging process in which the energy-transmitting and / or energy-receiving unit and the externally arranged energy-transmitting and / or energy-receiving unit are arranged horizontally relative to one another. By "horizontal to each other" should be understood in particular that the energy end and / or energy receiving unit and the externally arranged Energy End and / or energy receiving unit in the horizontal direction next to each other and / or adjacent to each other. Advantageously, the horizontal loading and / or unloading is designed as a front loading and / or unloading. A "front loading" should in particular be understood to mean a horizontal load, wherein the energy end and / or energy receiving unit is arranged in a front of a motor vehicle. A "front discharge" should in particular be understood to mean a horizontal discharge, wherein the energy end and / or energy receiving unit is arranged in a front of the motor vehicle. An "inductive energy transmission unit" is to be understood in particular as meaning a unit which is intended to generate a magnetic alternating field for electromagnetic energy transmission. An "inductive energy receiving unit" is to be understood in particular as meaning a unit which is intended to receive the electromagnetic alternating field generated by the energy-emitting unit for electromagnetic energy transmission and to convert it into electrical current. Advantageously, the energy-emitting unit and the energy-receiving unit each have at least one coil, each having a coil surface. Preferably, the Kraftfahrzeugakkumulator is designed as a Traktionsakkumulator, which is intended to provide an electric drive of the motor vehicle for providing a drive power with electrical energy. An "outer contour" is to be understood as meaning, in particular, a geometric profile of a contact surface of the energy transmission and / or energy reception unit, the contact surface being in contact with the corresponding energy transmission and / or energy reception unit, preferably for contacting a corresponding contact surface of the external energy transmission and / or energy reception unit is provided. Preferably, the energy end and / or energy receiving unit has a housing which forms and / or has the outer contour. The outer contour of the energy end and / or energy receiving unit and the outer contour of the corresponding external energy end and / or energy receiving unit are advantageously designed opposite to each other. A "positioning course" should in particular be understood to mean a deliberately and / or intentionally produced course of the entire contact surface of the outer contour, which differs from a straight course and is preferably designed specifically for changing the loading overlap. A "cooperation" should in particular be understood to mean pressing against one another, mutual support and / or at least partial intermeshing of the energy-transmitting and / or energy-receiving units.

A "charge coverage" is to be understood in particular as an arrangement of the energy transmission and / or energy reception unit which is preferably aligned relative to a main magnetic field direction relative to the corresponding energy transmission and / or energy reception unit. An "aligned arrangement" of the energy transmission and / or energy reception unit relative to the corresponding energy transmission and / or energy reception unit should in particular be understood that in the case of a perpendicular projection of coil surfaces of the energy transmission and / or energy reception unit and the corresponding energy transmission and / or Energy reception unit on a coil surface of the energy end and / or energy receiving unit-containing plane, the centroids of the projections of the coil surfaces come to cover. The charge overlap is preferably designed as a measure of a usable surface for the electromagnetic energy transfer. To change the charge coverage, the energy-transmitting and / or energy-receiving unit is preferably moved only parallel to its coil surface. The energy end and / or energy receiving unit is advantageously moved only perpendicular to the main magnetic field direction to change the charge coverage. The efficiency of charging and / or discharging, in particular horizontal loading and / or unloading, is advantageously dependent on the charge overlap. The efficiency of the charging and / or discharging, in particular of the horizontal charging and / or discharging, preferably increases with increasing charge coverage. The charge overlap is advantageously designed as a horizontal charge overlap. Preferably, when the charge coverage is changed, a distance between the energy transmission and / or energy reception unit and the corresponding energy transmission and / or energy reception unit remains unchanged. Preferably, the charge coverage changes by relative movement of the energy transmitting and / or receiving units in a horizontal spatial direction, which is arranged at least substantially perpendicular to a motor vehicle travel direction, and / or in a vertical spatial direction. A "main magnetic field direction" should be understood to mean in particular a direction which is arranged parallel to a direction of a magnetic field, preferably of the magnetic alternating field generated by the energy-emitting unit, in a point of the strongest magnetic field.

A "coil surface" is to be understood in particular a surface which is surrounded by a winding of the coil, wherein the surface is preferably surrounded in a projection direction, which passes through all windings, of the winding of the coil. Preferably, the projection direction is arranged parallel to the main magnetic field direction. A "motor vehicle travel direction" is to be understood in particular as meaning a direction in which the motor vehicle is absent Steering stroke would move or move. The motor vehicle travel direction is preferably designed as a direction in which the motor vehicle moves or moves for horizontal loading and / or unloading and / or for producing the energy-transmitting connection between the energy transmission and / or energy reception unit and the corresponding energy transmission and / or energy reception unit would. Advantageously, the motor vehicle travel direction is arranged parallel to a motor vehicle longitudinal axis. The motor vehicle travel direction is advantageously arranged horizontally. Preferably, the interaction takes place by moving the motor vehicle in the direction of travel of the motor vehicle. Advantageously, the motor vehicle travel direction is arranged at least substantially parallel to the main magnetic field direction. By "substantially" is meant in particular a deviation which is less than 20 °, advantageously less than 10 ° and particularly advantageously less than 5 °. "Provided" is to be understood in particular specially programmed, designed, equipped and / or arranged.

It is further proposed that the positioning course is intended to independently align the energy transmission and / or energy reception unit and the corresponding energy transmission and / or energy reception unit by the interaction. As a result, the charge coverage can be changed very easily. "Self-contained" should be understood in particular independently of a control and / or regulating unit and / or independently of a sensor system and preferably without a motor unit. "Aligning" is to be understood in particular as adjusting a position of the energy transmission and / or energy receiving unit to a position of the corresponding energy transmission and / or energy reception unit, the adaptation preferably being arranged in the horizontal spatial direction, which is at least substantially perpendicular to the motor vehicle travel direction is, and / or done in the vertical direction.

It is also proposed that the positioning course is intended to independently center the energy transmission and / or energy reception unit and the corresponding energy transmission and / or energy reception unit by the interaction. As a result, a particularly advantageous and in particular reproducible charge coverage can be found, whereby the efficiency can be adjusted to the optimum in a particularly simple and, in particular, reproducible manner. A "centering" is to be understood in particular as establishing a symmetry with regard to at least one point and / or one axis of the energy-transmitting and / or energy-receiving units, wherein the point is preferably designed as a center.

In particular, it is advantageous if the positioning course is provided to automatically set a defined charge coverage by the interaction, whereby a high efficiency can be set reproducibly for the charging processes reliably. A "defined charge coverage" should in particular be understood to mean charge coverage which is defined by a mutual contact of the outer contour of the energy transmission and / or energy reception unit and the outer contour of the corresponding energy transmission and / or energy reception unit, the entire contact surface of the outer contour of the energy transmission unit being defined. and / or energy receiving unit preferably contacts the entire contact surface of the corresponding outer contour of the external energy end and / or energy receiving unit. The defined charge overlap is preferably designed as a charge overlap, in which the efficiency of the energy transfer is maximum.

Further, it is advantageous if the inductive energy transmission and / or energy receiving unit is movably mounted in at least one horizontal spatial direction to change the charge coverage. As a result, the charge coverage can be changed very easily. Preferably, the horizontal spatial direction is arranged at least substantially perpendicular to the motor vehicle travel direction. The horizontal spatial direction is advantageously at least substantially perpendicular to the distance between the energy end and / or energy receiving unit and the corresponding energy end and / or energy receiving unit. In principle, the energy end and / or energy receiving unit for changing the charge coverage may be additionally or alternatively movably mounted in the vertical spatial direction. The inductive energy transmission and / or energy receiving unit is preferably movably mounted to change the charge coverage at least substantially perpendicular to the main magnetic field direction of the energy end and / or energy receiving unit. For mobile storage, the induction charging device preferably has guide elements such as guide rails.

Furthermore, it is advantageous if the positioning profile forms at least one contact surface, which is arranged obliquely at least to the spatial direction in which the inductive energy transmission and / or energy receiving unit is movably mounted for changing the charge overlap. As a result, the charge coverage can be changed particularly easily by the interaction. By "oblique to the spatial direction" should be understood in particular that the contact surface has at least one normal, which is oriented obliquely to the spatial direction.

In a further embodiment according to the invention, the positioning profile forms at least one kink. As a result, a particularly simple positioning course can be provided. A "kink" is to be understood in particular a course of the outer contour, which has two contact surfaces which face each other or facing away from each other. In principle, the positioning course can also form another form which appears expedient to the person skilled in the art, such as, for example, at least one conical jacket or at least one truncated cone jacket. A "conical surface" is to be understood as meaning, in particular, a course of the outer contour which has a contact surface running around an axis whose distance to the axis preferably increases continuously starting from a point, the axis passing through the point. Preferably, the contact surface is facing or facing away from the axis. A "truncated cone jacket" is to be understood as meaning, in particular, a profile of the outer contour which has a contact surface extending around an axis and a circular contact surface, wherein a distance of the contact surface extending around the axis from the circular contact surface preferably increases continuously and the distance between the contact surface Axle passes through a center of the circular contact surface. Preferably, the contact surface extending around the axis faces or faces away from the axis.

It is further proposed that the kink formed by the positioning profile is formed negative, whereby a particularly advantageous outer contour of the energy transmission and / or energy receiving unit can be realized. By "negative" is meant in particular a kink whose two contact surfaces face each other. In principle, the kink formed by the positioning profile can also be formed positively. By "positive" is meant in particular a kink whose two contact surfaces are facing away from each other.

Furthermore, it is proposed that the induction charging device has at least one restoring element, which is provided to press the energy-transmitting and / or energy-receiving unit against the corresponding inductive energy-transmitting and / or energy-receiving unit during the interaction. As a result, the defined charge coverage can be maintained particularly easily during a charging process.

In particular, it is advantageous if the induction charging device has a stationary arrangement. As a result, a particularly advantageous induction charging device can be realized. An "induction charging device having a stationary arrangement" should be understood in particular to mean a stationary induction charging device. Preferably, the other induction charging device, which has the corresponding energy end and / or energy receiving unit, is designed to be mobile. The other induction charging device having the corresponding energy end and / or energy receiving unit is advantageously integrated in the motor vehicle.

In addition, an induction charging system is proposed, with a motor vehicle device which has at least one electric motor vehicle accumulator, and with an induction charging device according to the invention, which is provided for wireless charging and / or discharging, in particular for a wireless horizontal loading and / or unloading, of the at least one motor vehicle accumulator , As a result, a particularly advantageous induction charging system can be provided, in which the charge coverage can be adjusted to an optimum without an expensive positioning of the motor vehicle device having motor vehicle to an optimum. The motor vehicle device preferably has an electric drive unit having at least the motor vehicle accumulator. An "electric drive unit" is to be understood, in particular, as a drive unit which has an electric drive for providing the electrical drive power. An "electric drive" is to be understood in particular as a motor vehicle drive with at least one electric motor. A "drive power" is to be understood, in particular, as meaning a power which is intended to drive the motor vehicle and thus driving wheels of the motor vehicle. The motor vehicle with the electric drive unit is preferably designed as an electric motor vehicle or as a hybrid motor vehicle.

Further advantages emerge from the following description of the drawing. In the drawings, an embodiment of the invention is 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.

Babel show:

1 schematically an induction charging system with a stationary induction charging device and a vehicle-mounted induction charging device,

2 schematically an energy transmission unit of the stationary induction charging device and a power receiving unit of the vehicle-side induction charging device, which contact each other and thus interaction and

3 schematically the energy transmission unit and the energy receiving unit which are optimally aligned by interaction against each other.

The 1 to 3 show schematically an induction charging system for wireless power transmission between two electromagnetic induction charging devices 10 . 11 , The induction charging devices 10 . 11 transfer energy according to a transformer principle. The energy transfer is horizontal. It takes place in a horizontal direction 25 , The induction charging system has a motor vehicle 26 on. The car 26 is designed as an electric motor vehicle. It is designed as a passenger vehicle.

The car 26 has a motor vehicle device 24 with an electric drive unit. The electric drive unit has an electric drive and an electrical Kraftfahrzeugakkumulator 12 , which is intended to provide the electric drive with electric current to provide an electric drive power on. For electrical charging of the motor vehicle battery 12 includes the motor vehicle device 24 a vehicle-side loader 27 that electrically with the induction charger 11 and the motor vehicle accumulator 12 connected is. The loader 27 is fixed in the motor vehicle 26 integrated. He is trained as an on-board loader. The automobile accumulator 12 is designed as a high-voltage battery.

For wireless horizontal charging of the motor vehicle battery 12 has the motor vehicle device 24 the induction charger 11 on. The induction charger 11 is formed as an on-vehicle induction charging device. It is fixed in the motor vehicle 26 integrated. The induction charger 11 is designed as a mobile induction charging device. For wireless front loading of the motor vehicle battery 12 is the induction charger 11 in a front 28 of the motor vehicle 26 arranged. The induction charger 11 is inside a body shell of the motor vehicle 26 arranged.

For power transmitting connection with the induction charging device 10 has the Induktiansladevorrichtung 11 an energy receiving unit 15 on. The energy receiving unit 15 is arranged at the front. The energy receiving unit 15 is along the horizontal direction 25 behind a front license plate 29 of the motor vehicle 26 arranged. It is at the front bumper of the motor vehicle 26 attached. The license plate 29 is at the power reception unit 15 attached. The energy receiving unit 15 has a housing 30 , A coil, not shown, and a spool not shown. The spool and spool core are inside the housing 30 arranged. The license plate 29 is on the case 30 the energy receiving unit 15 attached. The housing 30 is geometric to the license plate 29 customized. The coil of the energy receiving unit 15 is designed as a secondary coil. The license plate 29 and the case 30 are made of plastic.

For wireless horizontal charging of the motor vehicle battery 12 The induction charging system has the induction charging device 10 on. The induction charger 10 has a stationary arrangement. It is arranged stationary and thus formed stationary. The induction charger 10 is in a parking lot of the motor vehicle 26 arranged. For power transmitting connection with the induction charging device 11 of the motor vehicle 26 has the induction charging device 10 an energy transmission unit 13 on. The energy transmission unit 13 has a housing 31 , A coil, not shown, and a spool not shown. The spool and spool core are inside the housing 30 arranged. The coil of the energy transmission unit 13 is formed as a primary coil. When looking at the induction charging device 10 is the induction charger 11 for the induction charging device 10 as another induction charging device, whereby the power receiving unit 15 for the induction charging device 10 is designed as a corresponding and thus external energy receiving unit. In principle, the stationary induction charging device 10 In addition, a power receiving unit for the stationary induction charging device 10 is designed as an internal power receiving unit, and the mobile induction charging device 11 In addition, an energy transmission unit, which is used for the stationary induction charging device 10 is formed as an external energy transmission unit, whereby the motor vehicle accumulator 12 can be unloaded wirelessly and the induction charging devices 10 . 11 thus also for wireless horizontal unloading of the motor vehicle battery 12 are provided. The housing 31 is made of plastic.

For horizontal loading of the motor vehicle battery 12 indicates the energy transmission unit 13 an outer contour 14 on, with the inductive energy transmission unit 13 indirectly over the license plate 29 the corresponding inductive energy receiving unit 15 contacted in a charge. The housing 31 forms the outer contour 14 out. The outer contour 14 has two contact surfaces 19 . 20 on that the energy receiving unit 15 in the loading indirectly via the license plate 29 to contact. The contact surfaces 19 . 20 are the energy receiving unit 15 and thus the motor vehicle 26 facing in the charging process. In principle, the energy transmission unit 13 with its outer contour 14 the energy receiving unit 15 by doing Contact charging directly. In the charging process, the wireless power transmission from the power transmission unit takes place 13 to the power receiving unit 15 instead, causing the motor vehicle accumulator 12 is loaded.

For contacting the energy transmission unit 13 in the charging process, the power receiving unit 15 an outer contour 17 on. The outer contour 17 corresponds to an outer contour of the license plate 29 , The license plate 29 forms the outer contour 17 out. The license plate 29 and the case 30 have the same outer contour 17 on. The energy receiving unit 15 contacted in the charging the power transmission unit 13 by means of the license plate 29 , The outer contour 17 has two contact surfaces 21 . 22 on, which is the energy-emitting unit 13 contact in the charging process. The contact surfaces 21 . 22 are the energy end unit 13 facing in the charging process. The outer contours 14 . 17 are formed corresponding to each other. They are opposite to each other. Basically, the housing can 30 the outer contour 17 form, whereby the energy transmission unit 13 the energy receiving unit 15 contacted directly in the loading process.

For independent change of a horizontal charge coverage, the outer contour 14 a positioning history 16 on. The positioning history 16 changed by interaction with the outer contour 17 the energy receiving unit 15 independently the horizontal charge coverage. It alters the charge coverage when the power transmission unit is pressed against each other 13 and the power receiving unit 15 , This is indicated by the outer contour 17 a positioning history 32 on. The positioning history 32 is opposite to the positioning history 16 educated. The positioning profiles 16 . 32 are formed corresponding to each other. They are facing each other in the loading process. Through the interaction of the outer contours 14 . 17 the horizontal charge coverage changes due to a positioning pattern 16 . 32 defined shape of the outer contours 14 . 17 purely mechanically, ie without intervention of a control unit, without evaluation of a sensor and without a drive of the energy transmission unit 13 through a motor unit.

The positioning history 16 directed by the interaction with the outer contour 17 the energy transmission unit 13 and the energy receiving unit 15 independently against each other. It interactively changes a relative position between the energy-emitting unit due to the interaction 13 and the power receiving unit 15 , The positioning history 16 is intended to change the horizontal charge coverage of the energy end unit 13 and the energy receiving unit 15 align horizontally against each other. Through the interaction of the positioning process 16 with the outer contour 17 become the energy end unit 13 and the energy receiving unit 15 horizontally aligned with each other, in which the energy transmission unit 13 relative to the power receiving unit 15 moves, whereby the horizontal charge coverage changes. The positioning history 16 centered by the interaction with the outer contour 17 the energy transmission unit 13 and the energy receiving unit 15 independently against each other. It provides through the interaction with the outer contour 17 an optimal horizontal position of the energy transmission unit 13 relative to the power receiving unit 15 self-employed. The positioning history 16 is provided by the interaction to set the optimal charge coverage a horizontal position of the energy end unit 13 to the horizontal position of the power receiving unit 15 to adjust independently.

The positioning history 16 provides through the interaction with the outer contour 17 a defined horizontal charge coverage independently. He sets by the interaction independently a defined horizontal position of the energy transmission unit 13 relative to the power receiving unit 15 one. The positioning history 16 provides through the interaction with the outer contour 17 an optimum horizontal charge coverage, in which an efficiency of energy transfer is maximum. It provides through the interaction with the outer contour 17 an optimal horizontal loading position of the energy transmission unit 13 relative to the power receiving unit 15 self-employed.

To realize the autonomous change of the horizontal charge coverage by the interaction of the outer contours 14 . 17 is the inductive energy transmission unit 13 in a horizontal spatial direction 18 perpendicular to a motor vehicle travel direction 33 is arranged, movably mounted. The spatial direction 18 is in the charging process in which the energy transmission unit 13 and the energy receiving unit 15 are connected to one another in an energy-transmitting manner, perpendicular to the direction of travel of the motor vehicle 33 arranged. It is perpendicular to the horizontal direction 25 arranged. The spatial direction 18 is in the charging process perpendicular to a magnetic field main direction of a through the energy transmission unit 13 generated magnetic alternating field arranged. It is perpendicular to a horizontal distance of the energy transmission unit 13 from the power receiving unit 15 arranged. The energy transmission unit 13 is movably mounted to change the Ladeüberdeckung in a direction perpendicular to a height, relative to a floor on which the motor vehicle 26 stands or drives, is oriented. The motor vehicle travel direction 33 is parallel to one Motor vehicle longitudinal axis of the motor vehicle 26 arranged. The motor vehicle travel direction 33 is the direction in which the motor vehicle 26 to position itself for the distance charging process, just before the induction charging device 10 emotional. By "short" is intended in particular 3 meters, preferably 5 meters and most advantageously 10 meters in front of the induction charging device 10 be understood.

For independent horizontal change of the charge coverage in the interaction of the energy transmission unit 13 and the power receiving unit 15 forms the positioning course 16 the contact surfaces 19 . 20 off, each obliquely to the spatial direction 18 into which the energy transmission unit 13 is movably mounted, are arranged. The contact surfaces 19 . 20 are oblique to the direction of motor vehicle travel 33 oriented. The contact surfaces 19 . 20 are facing each other. Ie. the contact surfaces 19 . 20 each have normals that intersect with an extension in a direction in which the normals show. The normals of the contact surfaces 19 . 20 point towards motor vehicle 26 , The positioning history 16 thus forms a kink. The outer contour 14 leading to the contact of the power receiving unit 15 is provided has a kink. The kink is arranged in the middle. The outer contour 14 has the kink in the middle. Because the contact surfaces 19 . 20 facing each other, is the through the positioning course 16 Trained kink formed negative. The contact surfaces 19 . 20 have an angle to each other that is less than 180 degrees. The outer contour 14 is thus provided in the charging process, the power receiving unit 15 partially record. Basically, the positioning history 16 also train several kinks.

To a movement of the energy transmission unit 13 in the spatial direction 18 and to provide the horizontal change in charge coverage in the interaction forms the positioning history 32 the contact surfaces 21 . 22 from, which are each arranged obliquely to the motor vehicle longitudinal axis. The through the positioning course 32 trained contact surfaces 21 . 22 are each oblique to the direction of travel 33 arranged. The contact surfaces 21 . 22 are in the loading oblique to the spatial direction 18 arranged. The contact surfaces 21 . 22 are turned away from each other. Ie. the contact surfaces 21 . 22 each have normals which, when extended in one direction into which the normals point, lack an intersection with each other. The normals of the contact surfaces 21 . 22 point in the direction of energy end unit 13 , They point away from the motor vehicle 26 , The positioning history 32 thus also forms a kink, which is opposite to that by the positioning course 16 trained kink is formed. The outer contour 17 leading to contact of the power transmission unit 13 is provided has a kink. The kink is arranged in the middle. The outer contour 17 has the kink in the middle. Thus, the license plate indicates 29 and the case 31 a kink in the middle to the energy end unit 13 in cooperation with the energy transmission unit 13 in the horizontal spatial direction 18 to move. Because the contact surfaces 21 . 22 facing away from each other, is the by the positioning course 32 trained kink positively trained. The contact surfaces 21 . 22 have an angle to each other that is greater than 180 degrees. The outer contour 17 is thus provided in the charging process, in the energy transmission unit 13 partially intervene. Basically, the positioning history 32 also train several kinks.

The contact surfaces 19 . 20 . 21 . 22 are formed opposite to each other. They are designed to correspond to each other. They rub against each other as the charge coverage changes. When changing the charge overlap slide the contact surfaces 19 . 20 corresponding to each on one of the contact surfaces 21 . 22 , The contact surfaces 19 . 20 . 21 . 22 and thus the outer contours 14 . 17 are formed by a suitable material and / or by a suitable coating, through which or a friction between the contact surfaces 19 . 20 . 21 . 22 is reduced. The contact surfaces 19 . 20 . 21 . 22 and thus the outer contours 14 . 17 are optimized for low friction.

To damage the induction charging device 10 and the motor vehicle 26 upon contact between the induction charging device 10 and the motor vehicle 26 , for example, when positioning the motor vehicle 26 for charging, to avoid is the energy-emitting unit 13 in a horizontal spatial direction 34 parallel to the vehicle travel direction 33 is arranged, movably mounted. The energy transmission unit 13 is horizontal in the vehicle direction of travel 33 movably mounted. The energy transmission unit 13 is in the horizontal spatial direction 34 parallel to the vehicle travel direction 33 is arranged, movably mounted. The horizontal spatial direction 34 is parallel to the direction 25 arranged. It is parallel to the distance of the energy transmission unit 13 from the power receiving unit 15 arranged. The spatial directions 18 . 34 are oriented perpendicular to each other.

To the interaction between the energy transmission unit 13 and the power receiving unit 15 and to maintain the press against each other, has the induction charging device 10 a reset element 23 on, that in the interaction, the outer contour 14 the energy transmission unit 13 against the corresponding outer contour 17 the energy receiving unit 15 suppressed. The Return element 23 In cooperation, provides a force towards the energy receiving unit 15 and thus in the direction of the motor vehicle 26 shows. The force is designed as a restoring force. A direction of action by the return element 23 provided force is parallel to the spatial direction 34 arranged. The reset element 23 is at a setting of a home position of the power transmission unit 13 in the spatial direction 34 intended. The reset element 23 acts horizontally and parallel to the vehicle travel direction 33 , The energy transmission unit 13 is in the spatial direction 34 arranged resiliently. The reset element 23 is designed as a spring.

The induction charger 10 further has a fixed housing 35 on. The energy transmission unit 13 is relative to the fixed housing 35 in the two spatial directions 18 . 34 movably mounted. The reset element 23 is effective in the spatial direction 34 between the fast housing 35 and the energy transmission unit 13 arranged. The solid housing 35 is designed as a building wall. Basically, the solid housing 35 also formed separately and be firmly connected to the building wall. Of course, the solid housing 35 also as another, the expert appears to be useful, firmly connected to a soil attachment, such as a wall, a garage wall or the like. In this embodiment, the power transmission unit 13 fixed with respect to a vertical spatial direction and thus with respect to the height, ie the height of the energy transmission unit 13 is fixed.

To supply the energy transmission unit 13 with electric current, the induction charging device 10 an infeed not shown. The feed is electrically connected to a public power grid. It supplies the energy transmission unit 13 with an alternating voltage. The feed supplies the energy end unit 13 with 230 volts. The feed is inside the fixed housing 35 arranged.

For positioning of the motor vehicle 26 for charging is the motor vehicle 26 in the direction of travel 33 towards induction charging device 10 moves until the power receiving unit 15 by means of the front license plate 29 the energy transmission unit 13 contacted (cf. 2 ). In the 2 only contact the contact surfaces 19 . 21 , whereby the energy transmission unit 13 and the power receiving unit 15 an optimal charge coverage and thus an optimal alignment against each other is missing. By the movement of the motor vehicle 26 in the direction of travel 33 gives the in the spatial direction 34 movably mounted energy transmission unit 13 and moves towards the solid housing 35 according to the in the 2 shown spatial direction 34 , whereby the return element 23 provides the power that the energy end unit 13 against the energy receiving unit 15 suppressed. This will push the outer contour 14 the energy transmission unit 13 and the outer contour 17 the energy receiving unit 15 against each other, reducing the outer contours 14 . 17 interact. Due to the oppositely formed positioning profiles 16 . 32 the moves in the spatial direction 18 movably mounted energy transmission unit 13 independently in the in the 2 shown spatial direction 34 relative to the power receiving unit 15 , This will be the energy end unit 13 and the energy receiving unit 15 aligned horizontally, which changes the horizontal loading coverage. Due to the design of the positioning courses 16 . 32 center the energy transmission unit 13 and the energy receiving unit 15 by the interaction independently, which automatically sets a defined horizontal charge coverage.

The positioning profiles 16 . 32 due to the interaction due to their opposite training independently a reproducible horizontal Ladeüberdeckung. The at the positioning course 32 adjusted positioning history 16 When working together, it adjusts the horizontal position of the energy-emitting unit 13 to the horizontal position of the power receiving unit 15 at. When aligning the power transmission unit 13 opposite the energy receiving unit 15 slides the contact surface 19 on the contact surface 21 until the contact surface 19 entirely the contact surface 21 and the contact area 20 entirely the contact surface 22 contact, causing the energy transmission unit 13 and the energy receiving unit 15 are centered against each other and the defined charge coverage and thus the optimal horizontal loading position of the energy transmission unit 13 relative to the power receiving unit 15 is set (cf. 3 ). The reset element 23 In doing so, it represents the force that is the energy-emitting unit 13 against the energy receiving unit 15 pushes, while the entire charging process ready, causing the reset element 23 maintains the defined charge coverage and thus the defined loading position.

Due to the positioning of the motor vehicle 26 only a rough positioning of the induction charging is done 10 . 11 to each other. It only becomes the distance between the induction charging devices 10 . 11 by positioning the motor vehicle 26 set. A driver of the motor vehicle 26 only represents the distance between the induction charging devices 10 . 11 by maneuvering the motor vehicle 26 one. An elaborate and associated with great skill maneuvering of the motor vehicle 26 for setting the horizontal load coverage and thus the optimal horizontal loading position is eliminated, since this adjustment by the interaction of the outer contours 14 . 17 independently and purely mechanically.

In principle, the energy transmission unit 13 also in a vertical spatial direction perpendicular to the spatial directions 18 . 34 is arranged to be movably mounted, whereby the height of the energy transmission unit 13 is variably adjustable. Of course, it is conceivable that the positioning history 16 alternatively or additionally forms at least one contact surface which is arranged obliquely to the vertical spatial direction, whereby the energy transmission unit 13 through the interaction with the energy receiving unit 15 is moved independently in the vertical direction in space and thus in the interaction of a vertical charge coverage is changed or the energy transmission unit 13 and the energy receiving unit 15 vertically aligned, preferably centered. This is due to the interaction of the outer contours 14 . 17 additionally or alternatively, an optimal vertical position of the energy transmission unit 13 relative to the power receiving unit 15 independently and purely mechanically.

LIST OF REFERENCE NUMBERS

10

Induction charging device

11

Induction charging device

12

Kraftfahrzeugakkumulator

13

Power transmission unit

14

outer contour

15

Power receiving unit

16

positioning History

17

outer contour

18

spatial direction

19

contact area

20

contact area

21

contact area

22

contact area

23

Return element

24

Vehicle device

25

direction

26

motor vehicle

27

loaders

28

front

29

license plate

30

casing

31

casing

32

positioning History

33

Motor vehicle driving direction

34

spatial direction

35

solid housing

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 102009023409 A1 [0002]

Claims (10)

Induction charging device for a wireless charging and / or discharging of an electrical motor vehicle accumulator ( 12 ), in particular for a wireless horizontal loading and / or unloading, with an inductive energy transmission and / or energy receiving unit ( 13 ), which has an outer contour ( 14 ) and is provided for charging and / or discharging the motor vehicle accumulator ( 12 ) with the outer contour ( 14 ) a corresponding inductive energy transmission and / or energy receiving unit ( 15 ), characterized in that the outer contour ( 14 ) a positioning history ( 16 ), which is intended, by interaction with an outer contour ( 17 ) of the corresponding energy end and / or energy receiving unit ( 15 ) to change a charge coverage. Induction charging device according to claim 1, characterized in that the positioning course ( 16 ) is provided, by the interaction of the energy end and / or energy receiving unit ( 13 ) and the corresponding energy end and / or energy receiving unit ( 15 ) independently against each other align. Induction charging device according to claim 1 or 2, characterized in that the positioning course ( 16 ) is provided, by the interaction of the energy end and / or energy receiving unit ( 13 ) and the corresponding energy end and / or energy receiving unit ( 15 ) to center independently against each other. Induction charging device according to one of the preceding claims, characterized in that the positioning profile ( 16 ) is provided to independently set by the interaction of a defined charge coverage. Induction charging device according to one of the preceding claims, characterized in that the inductive energy end and / or energy receiving unit ( 13 ) for changing the charge coverage in at least one horizontal spatial direction ( 18 ) is movably mounted. Induction charging device according to claim 5, characterized in that the positioning course ( 16 ) at least one contact surface ( 19 . 20 ), which at least to the spatial direction ( 18 ) into which the inductive energy transmitting and / or receiving unit ( 13 ) is movably mounted to change the Ladeüberdeckung, is arranged obliquely. Induction charging device according to one of the preceding claims, characterized in that the positioning profile ( 16 ) forms at least one kink. Inductance charging device according to claim 7, characterized in that by the positioning course ( 16 ) formed kink is formed negative. Induction charging device according to one of the preceding claims, characterized by at least one return element ( 23 ), which is intended, in the interaction of the energy end and / or energy receiving unit ( 13 ) against the corresponding inductive energy end and / or energy receiving unit ( 15 ). Induction charging system with a motor vehicle device ( 24 ) comprising at least one electric motor vehicle accumulator ( 12 ), and with an induction charging device ( 10 ) according to one of claims 1 to 9, for a wireless charging and / or discharging, in particular for a wireless horizontal loading and / or unloading, of the at least one motor vehicle accumulator ( 12 ) is provided.

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