Automotive electronic flow pump

1 . An automotive electronic flow pump comprising:

a pump wheel which is configured to rotate, the pump wheel comprising an axial fluid inlet at a wheel upstream front side and a radial fluid outlet;

a pump housing which defines a pumping chamber and an electronics chamber;

an axial-flux motor which is configured to directly drive the pump wheel and which is arranged within the pumping chamber, the axial-flux motor comprising,

a motor stator which comprises at least one stator coil, and

a motor rotor which is arranged at a front side of the pump wheel and which is configured to co-rotate with the pump wheel;

a static separation wall arranged at a backside of the pump wheel, the static separation wall being configured to fluidically separate the pumping chamber from the electronics chamber;

a motor electronics arranged in the electronics chamber, the motor electronics being directly electrically connected to the at least one stator coil;

an electronics chamber lid body which is made of a plastic and which is configured to enclose the electronics chamber; and

a stiff U-shaped coil connecting wire which comprises a cast-in section,

wherein, at least the cast-in section of the stiff U-shaped coil connecting wire is cast into the electronics chamber lid body.

2 . The automotive electronic flow pump as recited in claim 1 , further comprising:

at least two coil-connecting wires which are arranged to axially pass the pumping chamber radially outside of the pumping chamber and which directly electrically connect the motor electronics to the at least one stator coil.

3 . The automotive electronic flow pump as recited in claim 2 , wherein each of the at least two coil-connecting wires are combined in one single substantially axial connecting wires path.

4 . The automotive electronic flow pump as recited in claim 3 , wherein the one single substantially axial connecting wires path is provided circumferentially in an upstream volute-half-sector where a cross section of a volute channel, which is defined by the pump housing and which surrounds the radial fluid outlet of the pump wheel, is smaller than in a downstream volute-half-sector.

5 . The automotive electronic flow pump as recited in claim 1 , wherein,

the static separation wall is a metal sheet body, and

the motor electronics is arranged to be in a direct thermal contact with the static separation wall.

6 . The automotive electronic flow pump as recited in claim 1 , wherein the static separation wall is a static separation wall body which defines a friction bearing support element which is arranged to protrude axially.

7 . The automotive electronic flow pump as recited in claim 1 , wherein,

the motor electronics comprises a printed circuit board,

the static separation wall is arranged to substantially lie in a transversal plane and comprises at least one proximal protuberance,

the at least one proximal protuberance defines a protuberance cavity, and

a contact pin end is arranged to protrude from the printed circuit board of the motor electronics into the protuberance cavity.

8 . The automotive electronic flow pump as recited in claim 7 , wherein,

the stiff U-shaped coil connecting wire further comprises an axial electronics connector leg which comprises a pin end, and

the pin end is electrically directly connected to the printed circuit board of the motor electronics.

9 . The automotive electronic flow pump as recited in claim 8 , wherein the stiff U-shaped coil connecting wire further comprises an axial coil connector leg which is arranged to laterally pass the pumping chamber.

10 . The automotive electronic flow pump as recited in claim 8 , further comprising:

at least two pump connector pins which are cast-in the electronics chamber lid body, the at least two connector pins each comprising a proximal pin end,

wherein,

the proximal pin ends are each directly electrically connected to the printed circuit board of the motor electronics.

11 . The automotive electronic flow pump as recited in claim 10 , wherein the proximal pin ends of the at least two pump connector pins and the pin end of the axial electronics connector leg of the stiff U-shaped coil connecting wire are parallel to each other and are axially orientated.

12 . The automotive electronic flow pump as recited in claim 1 , wherein the stiff U-shaped coil connecting wire further comprises a legs-connecting bridge which defines the cast-in section.

13 . The automotive electronic flow pump as recited in claim 1 , further comprising:

a separate coil wire comprising a wire end which is connected to the at least one stator coil,

wherein,

the pump housing comprises a pump housing main body which defines an axial pump inlet, a tangential pump outlet, and an assembly chamber,

the stiff U-shaped coil connecting wire further comprises a coil-connecting wire end, and

the coil-connecting wire end of the stiff U-shaped coil connecting wire and the wire end of the separate coil wire are electrically directly connected to each other.

14 . The automotive electronic flow pump as recited in claim 13 , further comprising:

a separate access opening lid,

wherein,

the pump housing main body further defines an assembly chamber access opening which is arranged to be closed by the separate access opening lid.