DE102014000347B4 - Primary part, in particular ground-based primary part, for a system for contactless energy transmission - Google Patents

Abstract

Primary part for a system for non-contact energy transmission, a shielding plate (6) being placed and/or detachably connected to a body which has concrete (1) with reinforcement (2), a ferrite arrangement being placed on the shielding plate (6) and/ or detachably connected, a polymer concrete slab (17) being placed on the ferrite arrangement and/or detachably connected, a primary winding (3) and/or an antenna (16) being cast around and/or surrounded by polymer concrete in the polymer concrete slab (17). is,wherein the ferrite layer has two plastic foils, between which ferrite parts are arranged,wherein the respective foil is adhesively bonded to the ferrite parts,- the reinforcement (2) has sections which widen towards the inside of the concrete (1)- and/or wherein the Reinforcement (2) having first, second and third bars, wherein the first bars are oriented perpendicular to the second bars and the third bars are perpendicular to the first and perpendicular in true alignment with the second bars, the reinforcement (2) being encased in the concrete (1) and housed in a trough (40) resting on a damping element (8) resting on a frame member, wherein in Fig Polymer concrete plate (17) an electronic circuit is arranged, which is electrically connected to the primary winding (3) and / or the antenna (16).

Description

The invention relates to a primary part, in particular a ground-based primary part, for a system for contactless energy transmission.

It is generally known that in the case of contactless charging stations, a primary part is provided in a stationary manner, to which an alternating current is applied.

From the WO 2013/056879 A1 a device for the inductive transmission of electrical energy is known.

From the WO 2013/174527 A1 a device for the inductive transmission of electrical energy is also known.

From the DE 10 2008 048 822 A1 a laying of electrical lines along a route of a vehicle is known.

From the DE 10 2012 202 472 A1 an inductive charging station for an electric vehicle is known.

From the DE 10 2011 115 092 A1 an inductive charging station is known.

From the DE 92 15 550 U1 three-dimensional reinforcements in a concrete slab are known.

From the AT 351 231 B T-shaped steel beams are known.

From the DE 33 44 134 A1 elastic plates arranged between standing surfaces and feet are known.

The invention is therefore based on the object of further developing a charging station, in which case environmental protection should be able to be implemented in a cost-effective manner.

According to the invention, the object is achieved in the primary part according to the features specified in claim 1.

Important features of the invention in the primary part, in particular ground-based primary part, for a system for contactless energy transmission are, among other things, that a shielding plate is arranged, in particular placed and/or detachably connected, on a body that has concrete with reinforcement,
wherein a ferrite arrangement is arranged on the shielding plate, in particular placed and/or detachably connected,
wherein a polymer concrete slab is arranged on the ferrite arrangement, in particular placed and/or detachably connected, or a grating.

The advantage here is that a loose layer structure is implemented, so that simple disassembly can be carried out. Because the respective layer, i.e. polymer concrete plate, ferrite layer, shielding plate or body is detachably mounted and can therefore be removed from the shaft without any effort. Dismantling can therefore be carried out in a simple manner and components can therefore be reused in a cost-effective manner, ie environmental protection can be achieved in a cost-effective manner.

According to the invention, a primary winding and/or an antenna, in particular an antenna winding, is arranged in the polymer concrete slab, in particular cast around and/or surrounded by polymer concrete. The advantage here is that the winding and antenna are arranged in a protected manner.

In an advantageous embodiment, the primary winding is a concentric flat winding and the antenna is arranged centrally and concentrically to the primary winding. The advantage here is that despite the strong magnetic field, data can be transmitted using an antenna. The antenna winding consists of two parts that have different winding senses, so that the total voltage induced by the strong magnetic field of the primary winding disappears

According to the invention, an electronic circuit is arranged in the polymer concrete slab, in particular surrounded by polymer concrete, which is electrically connected to the primary winding and/or the antenna. The advantage here is that a watertight encapsulation can be achieved

According to the invention, the reinforcement has sections that widen towards the inside of the concrete,
and
the reinforcement comprises first, second and third bars, the first bars being oriented perpendicularly to the second bars and the third bars being oriented perpendicularly to the first bars and perpendicularly to the second bars, in particular the reinforcement being encapsulated by the concrete and in a trough is accommodated, which rests on a damping element, which rests on the frame part, in particular on the trough section of the frame part. The advantage here is that a stable reinforcement can be produced.

In an advantageous embodiment, a vertically continuous recess is arranged in the concrete, in particular in the middle of the concrete. The advantage here is that penetrating water can be drained off quickly.

In an advantageous embodiment, a cable is routed and/or arranged from the primary winding through the recess to feed electronics
wherein the feed electronics feeds a medium-frequency current into the primary winding. The advantage here is that water can be drained through the recess and the cable can be fed through in a simple manner, ie over a short distance.

According to the invention, the ferrite layer has two plastic films, between which ferrite parts are arranged
the respective foil is adhesively bonded to the ferrite parts,
in particular, the ferrite parts forming a gap-free layer, ie are arranged to fill the entire area. The advantage here is that even if the ferrite parts are destroyed, such as crumbling, the ferrite layer is held together.

In an advantageous embodiment, a supply electronics is arranged in a housing part, in particular a bell-shaped housing part,
the housing member being attached to a frame portion which includes a trough portion, the reinforced concrete being placed on a cushioning element placed on the bottom of the trough portion. The advantage here is that even with rising water, the feed electronics can be arranged in a protected manner. Because inside the bell, the water level can only rise as far as the water pressure corresponds. However, the feed electronics are arranged above the water level associated with the maximum permissible pressure.

In an advantageous embodiment, horizontally extending webs are formed on or connected to the housing part, each of which has a nose section whose respective nose is aligned vertically downwards and thus the bell-shaped housing part is held in a form-fitting manner on the support arms of the frame part, which are on the underside of the trough section of the frame part are arranged and extend horizontally at least in the connection area to the nose sections,
in particular, a respective web being placed on the respective support arm and secured, as it were, in a form-fitting manner in the horizontal direction by means of the respective nose. The advantage here is that stable attachment of the feed electronics can be implemented.

In an advantageous embodiment, the feed electronics are attached to the underside of the trough or the trough section
and/or the feed electronics are arranged in the concrete surrounding the reinforcement. The advantage here is that the feed electronics can be arranged in a protected manner.

Important features of the system for non-contact energy transmission from a primary part to a vehicle are that the primary part has a primary winding to which a medium-frequency alternating current is applied by the supply electronics, in particular with a frequency between 10 and 1000 kHz,
in particular wherein the vehicle has a secondary winding on its underside, which can be inductively coupled to the primary winding,
a capacitance being connected in series or in parallel to the secondary winding, the associated resonant frequency being essentially the same as the frequency of the alternating current.

The advantage here is that a charging station for electric vehicles can be produced in a simple manner and in a more stable manner in relation to external influences. A high level of efficiency can be achieved because resonant transmission can be implemented.

• In der 1 ist ein erfindungsgemäßer lose gestapelter Schichtaufbau bei einem Primärteil eines Systems zur berührungslosen Energieübertragung von dem Primärteil an ein Elektrofahrzeug gezeigt.
• In der 2 ist ein ersatzweise verwendbarer Dummy-Aufbau gezeigt, der ebenfalls gestapelt vorgesehen ist.
• In der 3 ist ein alternativer Dummy-Aufbau gezeigt.
• In der 4 ist ein zu 1 alternativer Aufbau gezeigt.

The invention will now be explained in more detail with reference to figures:

• In the 1 a loosely stacked layer structure according to the invention is shown in a primary part of a system for contactless energy transmission from the primary part to an electric vehicle.
• In the 2 an alternatively usable dummy structure is shown, which is also provided stacked.
• In the 3 an alternative dummy setup is shown.
• In the 4 is a to 1 alternative structure shown.

As in 1 shown, the system for contactless, in particular inductive, energy transmission has a primary part that can be driven on by an electric vehicle, which has a secondary winding on its underside that can be inductively coupled to a primary winding 3 of the primary part.

Energy can thus be transmitted from the primary part to the vehicle and the energy store of the vehicle can be charged from the secondary winding, in particular via an intermediate rectifier.

The primary part is provided on the floor, being arranged in a recess of a surrounding floor covering, such as paving stones.

For this purpose, the recess is designed as a shaft 9, which is formed from ring-shaped delimiting elements stacked vertically one on top of the other.

The ring-shaped delimiting elements are preferably formed from concrete and/or reinforced concrete and are surrounded by soil 10 .

A frame part 14 is arranged on the upper side of the shaft 9, on the underside of which a centrally arranged recess is arranged a bell-shaped housing part 11, in the interior of which an electronic feed unit 12 is arranged, ie an electronic feed unit.

Since the bell is open at the bottom but closed at the top, ingress of water is prevented as long as a permissible water pressure value is not exceeded.

The feed electronics 12 can thus be arranged at such a height that it is at a distance from the water, even when the water is rising or rising in the shaft 9 .

The frame part has a trough section, the upper edge of the trough section being arranged next to the surrounding paving stones 7 to the vehicle and thus forming a boundary and/or border of the surrounding paving stones 7 .

As mentioned above, the trough section has a centrally located recess which is arranged above the bell-shaped housing part 11 and through which water which has entered the trough section can drain off. In addition, horizontally extending webs are formed or connected to housing part 11, each of which has a nose section 13, the respective nose of which is aligned vertically downwards and thus the bell-shaped housing part 11 is held in a form-fitting manner on the support arms of the frame part 14, which are on the underside of the trough section of the Frame part 14 are arranged and extend horizontally. Because the webs are placed on the support arms and secured in a form-fitting manner, so to speak, in the horizontal direction by means of the lugs.

The loosely stacked layer structure is accommodated in the trough section.

The layered structure has a damping element 8 lying on the trough floor of the trough section, on which a body, in particular a plate, made of concrete rests, with reinforcement 2 , in particular made of steel, being arranged in the concrete 1 . The reinforcement 2 is designed in such a way that a high load, for example as a result of a truck and/or passenger car driving over the primary part, is permissible.

The damping element 8 is preferably a rubber element.

On top of the body made of concrete 1 and reinforcement 2, a shielding plate 6 with a ferrite layer placed or glued on is placed. Thus, the shielding plate 6 is preferably made of aluminum.

In the last-mentioned case of the ferrites laid on, these are preferably adhesively bonded to the shielding plate 6.

In the other case, the ferrites are arranged between two foils. For this purpose, a first film is adhesively bonded to the underside of an essentially gap-free ferrite layer, and a second film is also adhesively bonded to the top. Cohesion is thus ensured even if the ferrite elements forming the ferrite layer are destroyed, for example if they break and/or crumble. This ferrite layer, which is held together by adhesive bonding with foils, is placed on the shielding plate 6 .

A polymer concrete slab 17, in particular a polymer concrete layer, is placed on top of this ferrite layer held together, ie on the upper foil.

The primary winding 3 is cast in the polymer concrete slab 17 and an antenna 16, in particular an antenna winding, for communication between the vehicle and the primary part. In this case, data is transmitted, such as the state of charge of the vehicle's energy store, so that the primary winding 3 can be supplied with current depending on the state of charge.

The antenna 16 is arranged in the center of the primary winding 3 designed as a flat winding. In addition, the antenna 16 is arranged parallel to the primary winding 3 . A first part of the antenna 16 is designed with a different winding direction than another part of the antenna 16. In this way it is possible that data can be transmitted even in the strong magnetic field generated by the primary winding 3, since the data from the field to the Parts induced voltages cancel each other out.

In addition, not only the antenna 16 and the primary winding 3 are surrounded by polymer concrete of the polymer concrete plate 17, but also an electronic circuit which is connected to the antenna 16 and/or the primary winding 3.

A medium-frequency current is generated by the electronic feed 12, which is routed via a cable 5, which is routed through a vertically running recess 4, in particular an installation shaft, from the electronic feed 12 to the primary winding 3.

To form this recess 4, in particular to form this installation shaft, both the body made of concrete 1 and reinforcement 2, the shielding plate 6 and the ferrite layer have a corresponding recess. Thus, the cable 5 is guided through the recess arranged centrally in the frame 14 and the recess 4 .

The cable 5 to the electronic feed system 12 is preferably guided into the bell-shaped housing part 11 from below, so that no further recess has to be provided in the bell-shaped cover of the bell-shaped housing part 11 .

The shielding plate 6 is made of aluminum and thus shields the alternating magnetic field generated by the primary winding 3 to reinforce the body. Because the reinforcement is made of steel and would be greatly heated if the shielding plate 6 were not present. In addition, the losses during energy transmission would then be higher.

Since the shielding plate 6 only rests on the body, which in turn is placed on the damping element 8, and since the ferrite layer held together by means of the foils is placed on the shielding plate 6 and the polymer concrete plate 17 is placed on the ferrite layer, which may be held together by means of the foils realized a detachable connection and allows disassembly and disposal in a simple manner.

The body made of concrete 1 and reinforcement 2 preferably has a fastening device, such as a lifting eyelet or a screw thread embedded in the concrete or a dowel embedded in the concrete 1, so that the body can be lifted easily. Likewise, such fastening devices can also be arranged in the polymer concrete slab.

Like in the 2 , A non-inventive embodiment shown, instead of the shielding plate 6, the ferrite layer and the polymer concrete plate 17, a grating 20 can be placed on the body of concrete 1 and reinforcement 2. Thus, the frame part 14 can also be saved, as can the feed electronics 12 together with the bell-shaped housing part 11. In this way, a dummy for the primary part, which can also be driven on, can be produced in a simple manner. Retrofitting can be carried out inexpensively since only the grating 20 has to be disposed of.

Penetrating water is through the recess 4, which in the embodiment 1 together with the recesses of the ferrite layer, the shielding plate 6 formed the installation shaft, can be discharged into the shaft.

The grating 20 is in turn placed loosely on the body. Thus, retrofitting with feed electronics 12 and the other parts mentioned is made possible without any particular effort.

As in 3 shown, instead of the grating 20, a concrete slab 30 made of polymer concrete can also be used, so that there are no significant depressions in the floor surface. However, any water that hits the paving stones must be disposed of sideways.

As in 4 shown, in contrast to 1 a trough 40 filled with concrete 1, in particular made of steel, placed on the damping element 8, the trough having reinforcement sections which widen towards the inside of the concrete 1, in particular pointed-head-shaped reinforcement sections, in particular made of steel, which are preferably welded to the trough 40.

On the upper side of the concrete 1 arranged in the trough 40, the shielding part 6 is again placed and the ferrite layer is provided on it, on which in turn the polymer concrete plate 17 with the primary winding 3 and antenna 16 cast therein is placed.

For the supply electronics 12 are in 4 two spatial areas are indicated, which are provided alternatively or together for the feed electronics 12.

The upper spatial area offers the advantage that the feed electronics 12 can be arranged within the trough 40 and can therefore be arranged in a protected manner, in particular bordered by concrete 1 and the trough 40, in particular made of steel.

The lower spatial area offers the advantage that the feed electronics 12 can be connected to the underside of the trough floor of the trough 40 and is therefore more easily accessible, in particular for assembly and maintenance. For connecting to the underside or detaching from the underside, only the trough 40 has to be lifted and then the feed electronics 12 have to be connected or detached.

In a further embodiment of the invention, the loose layer structure is the 1 and 4 can also be secured with positive locking using additional screws.

Reference List

1

concrete

2

Reinforcement, in particular of steel

3

primary winding

4

Recess, in particular installation shaft

5

Cable

6

Shielding plate with applied or glued ferrite layer

7

Floor covering, in particular paving stones

8th

Damping element, in particular rubber mat

9

Shaft formed by ring-shaped delimiting elements

10

soil

11

bell-shaped case

12

feed electronics

13

nose section

14

frame part

15

Cable

16

Antenna, in particular antenna winding

17

polymer concrete slab

20

grating

30

Concrete slab, in particular made of polymer concrete

40

tub, in particular of steel

41

Reinforcement that widens towards the inside of the concrete, in particular in the shape of a mushroom head, in particular made of steel

Claims (7)

Primary part for a system for contactless energy transfer, a shielding plate (6) being placed and/or detachably connected to a body which has concrete (1) with reinforcement (2), a ferrite arrangement being placed and/or detachably connected to the shielding plate (6), a polymer concrete slab (17) being placed and/or detachably connected to the ferrite arrangement, wherein a primary winding (3) and/or an antenna (16) is cast around and/or surrounded by polymer concrete in the polymer concrete slab (17), wherein the ferrite layer has two plastic foils between which ferrite parts are arranged, the respective foil is adhesively bonded to the ferrite parts, - The reinforcement (2) has sections that widen toward the interior of the concrete (1). - and/or wherein the reinforcement (2) comprises first, second and third bars, the first bars being oriented perpendicular to the second bars and the third bars being oriented perpendicular to the first and perpendicular to the second bars, wherein the reinforcement (2) is cast around by the concrete (1) and is accommodated in a trough (40) which rests on a damping element (8) which rests on a frame part, wherein an electronic circuit is arranged in the polymer concrete slab (17) and is electrically connected to the primary winding (3) and/or the antenna (16). primary part after claim 1 , characterized in that the ferrite parts form a gap-free layer, so are arranged to fill the area. Primary part according to at least one of the preceding claims, characterized in that the primary winding (3) is a concentric flat winding and the antenna (16) is arranged centrally and concentrically with the primary winding (3). Primary part according to at least one of the preceding claims, characterized in that a vertically continuous recess (4) is arranged in the concrete (1). Primary part according to at least one of the preceding claims, characterized in that a cable (5, 15) is routed and/or arranged from the primary winding (3) through the recess (4) to feed electronics (12), the feed electronics supplying a medium-frequency current feeds into the primary winding (3). Primary part according to at least one of the preceding claims, characterized in that feed electronics (12) are arranged in a bell-shaped housing part (11), the housing part (11) being fastened to the frame section which has a trough section, the concrete (1) is arranged with reinforcement (2) on a damping element (8) which is arranged on the bottom of the trough section. Primary part according to at least one of the preceding claims, characterized in that horizontally extending webs are formed on or connected to the housing part (11) and each have a nose section (13) of the sen respective lug is aligned vertically downwards and thus the bell-shaped housing part (11) is held in a form-fitting manner on support arms of the frame part (14), which are arranged on the underside of the trough section of the frame part (14) and at least in the connection area to the lug sections (13 ) extend horizontally.

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