# US 12,224,631 B2 · Method for producing a stator assembly, and stator assembly

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- Number: US 12,224,631 B2
- Document ID: US12224631B2
- Status: Granted
- Kind: B2
- Application number: 17/271,789
- Filed: 2019-08-22
- Published: 2021-11-04
- Granted: 2025-02-11
- Earliest claimed: 2018-08-27
- Assignees: Vitesco Technologies GmbH
- Applicants: Vitesco Technologies GmbH
- Inventors: Jens Artmann
- Web page: https://patentgrep.com/patent/US12224631B2

## CPC

- H02K 11/40: Structural association with grounding devices
- H02K 3/522: {for generally annular cores with salient poles}
- H02K 15/12: Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
- H02K 15/32: Manufacture of terminal arrangements; Connecting the terminals to external circuits
- H02K 15/022: with salient poles
- H02K 2203/03: Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
- H02K 2203/12: Machines characterised by the bobbins for supporting the windings
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A method for producing a stator assembly of an electric motor includes: providing a laminated core of the stator assembly; mounting at least one coil former on the laminated core; mounting a ground contact pin on the laminated core provided with the coil former; and overmolding the laminated core with plastic.

## Claims

### Claim 1

A method for producing a stator assembly of an electric motor, the method comprising:
providing a laminated core (1) of the stator assembly;
mounting at least one coil former (2) on the laminated core (1);
mounting a ground contact pin (4), formed as a lead frame pin, on the laminated core (1) in a receptacle (3) on the coil former (2) so that the ground contact pin (4) extends axially parallel to a longitudinal axis of the stator assembly; and
overmolding the laminated core and a portion of the ground contact pin (4) with plastic after mounting the ground contact pin (4) on the laminated core (1) provided with the coil former (2),
wherein an end of the ground contact pin (4), opposite the laminated core, is exposed from the overmolding.

### Claim 2

A method for producing a stator assembly of an electric motor, the method comprising:
providing a laminated core (1) of the stator assembly;
mounting at least one coil former (2) on the laminated core (1);
mounting a ground contact pin (4), formed as a lead frame pin, on the laminated core (1) provided with the coil former (2); and
overmolding the laminated core and a portion of the ground contact pin (4) with plastic after mounting the ground contact pin (4) on the laminated core (1) provided with the coil former (2),
wherein the ground contact pin (4) is mounted on the coil former (2) in contact with the laminated core (1).

### Claim 3 (depends on 2)

The method as claimed in claim 2, wherein the ground contact pin (4) is mounted in a receptacle (3) on the coil former (2).

### Claim 4 (depends on 1)

The method as claimed in claim 1, wherein the ground contact pin (4) is mounted as a press-fit pin.

### Claim 5 (depends on 1)

The method as claimed in claim 1, further comprising mounting the ground contact pin (4) to a circuit board of the stator assembly.

### Claim 6

A method for producing a stator assembly of an electric motor, the method comprising:
providing a laminated core (1) of the stator assembly;
mounting at least one coil former (2) on the laminated core (1);
mounting a ground contact pin (4), formed as a lead frame pin, on the laminated core (1) provided with the coil former (2); and
overmolding the laminated core and a portion of the ground contact pin (4) with plastic after mounting the ground contact pin (4) on the laminated core (1) provided with the coil former (2),
wherein at least one coil former (2) mounted on the laminated core is fixed, at least in part, by the ground contact pin (4).

### Claim 7 (depends on 1)

A stator assembly produced by the method of claim 1.