Coil unit for inductively charging a vehicle, and system
A coil unit inductively charges a vehicle. The coil unit has a housing and a coil. The coil is arranged at least partly in the housing. The coil has a plurality of windings of at least one electrical line, wherein the electrical line has two ends, and both ends of the electrical line are led out of the housing for connection to an electronic unit.
1 . A coil unit for inductively charging a vehicle, comprising:
a housing;
a coil that is arranged at least partially in the housing; and
a plug for connecting to a socket of an electronic unit, wherein
the coil comprises a plurality of windings of an electrical line, wherein the electrical line has two ends,
both ends of the electrical line are connected to the plug,
the plug comprises:
an outer non-conductive wall;
a middle non-conductive wall positioned radially inward from the outer non-conductive wall;
an inner non-conductive wall positioned radially inward from the middle non-conductive wall;
an outer recess between the outer and middle non-conductive walls; and
a plug-in contact electrically connected to the electrical line, the plug-in contact being positioned between the middle non-conductive wall and the inner non-conductive wall;
an inner recess positioned radially outside of the plug-in contact, a center of the inner recess being coincident with the centerline of the plug;
the outer and inner recesses are configured to engage a plurality of complementary pieces of the socket, and
both ends of the electrical line are led out of the housing for connecting to the electronic unit, wherein the electronic unit comprises electronics installed in the vehicle.
2 . The coil unit as claimed in claim 1 , wherein the electrical line comprises an HF braid.
3 . The coil unit as claimed in claim 1 , wherein
a braided shield is arranged around the electrical line that is led out of the housing.
4 . The coil unit as claimed in claim 3 , wherein
the housing comprises an outer side of metal, and
the braided shield is connected to the outer side.
5 . The coil unit as claimed in claim 4 , wherein
the coil unit comprises a ferrite component that is arranged at least partially in the housing, and
the braided shield is connected to the ferrite component.
6 . The coil unit as claimed in claim 5 , wherein
the braided shield is connected to the outer side or to the ferrite component by way of a flange.
7 . The coil unit as claimed in claim 3 , wherein
one or a plurality of signal lines are arranged inside the braided shield.
8 . The coil unit as claimed in claim 1 , further comprising:
a strain relief that is connected to the plug and the coil unit.
9 . The coil unit as claimed in claim 1 , wherein
the plug comprises a mechanism for electrical disconnection in an event of a separation of the plug connection.
10 . The coil unit as claimed in claim 1 , wherein
the ends of the electrical line are led out of the housing at an angle between 45° and 135°.
11 . The coil unit as claimed in claim 10 , wherein the angle is with respect to:
a first axis that extends along a respective coil winding of the plurality of windings of the coil in a region before the electrical line is led out of the housing, and
a second axis that extends essentially along the respective coil winding after a first bend and being led out of the housing.
12 . The coil unit as claimed in claim 1 , wherein the outer, middle and inner non-conductive walls of the plug extend in a circumferential direction, whereby air travels in a circumferential path before emerging from the plug.
13 . The coil unit as claimed in claim 1 , wherein the plug has 180-degree rotational symmetry about the centerline of the plug.
14 . A coil unit for inductively charging a vehicle, comprising:
a housing;
a coil that is arranged at least partially in the housing; and
a plug for connecting to a socket of an electronic unit, wherein
the coil comprises a plurality of windings of an electrical line, wherein the electrical line has two ends,
both ends of the electrical line are connected to the plug,
the plug comprises:
an outer non-conductive wall;
a middle non-conductive wall positioned radially inward from the outer non-conductive wall;
an inner non-conductive wall positioned radially inward from the middle non-conductive wall;
an outer recess between the outer and middle non-conductive walls; and
a plug-in contact electrically connected to the electrical line, the plug-in contact being positioned in the middle recess between the middle non-conductive wall and the inner non-conductive wall,
an inner recess positioned radially outside of the plug-in contact, a center of the inner recess being coincident with the centerline of the plug;
the outer and inner recesses are configured to engage a plurality of complementary pieces of the socket,
both ends of the electrical line are led out of the housing for connecting to the electronic unit, the electronic unit comprising electronics installed in the vehicle, and
the plug is configured such that, when in a plugged-in state, it has air and leakage gaps of >=15 mm.
15 . The coil unit as claimed in claim 14 , wherein the outer, middle and inner non-conductive walls of the plug extend in a circumferential direction, whereby air travels in a circumferential path before emerging from the plug.
16 . The coil unit as claimed in claim 14 , wherein the plug has 180-degree rotational symmetry about the centerline of the plug.