Immersion cooling lamination

Patent metadata

Field	Value
Publication number	US-2025392175-A1
Application number	US-202519245078-A
Country	US
Kind code	A1
Filing date	Jun 20, 2025
Priority date	Jun 21, 2024
Publication date	Dec 25, 2025
Grant date	—

Abstract

Systems and methods are provided for a coated lamination layer for an electric motor. The coated lamination layer includes a lamination layer base of annular shape defined by an inner edge and an outer edge with a plurality of radially arranged slot openings and a plurality of radially arranged channel openings, and a sealing layer protruding from a surface of the lamination layer base, wherein the sealing layer is a screen-printed coating. The coated laminations layers are stacked into a stator with the sealing layers sealing regions between the lamination layer bases.

First claim

1 . An electric machine system, comprising:
a coated lamination layer, including:
a lamination layer base of annular shape defined by an inner edge and an outer edge with a plurality of radially arranged slot openings and a plurality of radially arranged channel openings; and
a sealing layer protruding from a surface of the lamination layer base;
wherein the sealing layer includes a screen-printed coating.

2 . The electric machine system of claim 1 , wherein the screen-printed coating comprises a first section positioned between the inner edge and the plurality of radially arranged slot openings.

3 . The electric machine system of claim 2 , wherein the screen-printed coating further comprises a second section positioned between the plurality of radially arranged slot openings and a third section positioned between the plurality of radially arranged channel openings and the outer edge.

4 . The electric machine system of claim 3 , wherein the first section, the second section, and the third section are closed shapes spaced away from one another.

5 . The electric machine system of claim 3 , wherein the first section, the second section, and the third section are shaped as rings centered about a rotational axis extending through a center of the lamination layer base.

6 . The electric machine system of claim 5 , wherein the first section has a first diameter, the second section has a second diameter greater than the first diameter, and the third section has a third diameter greater than the second diameter.

7 . The electric machine system of claim 6 , wherein the first diameter is approximately the same as an inner diameter of the inner edge.

8 . The electric machine system of claim 2 , wherein the screen-printed coating further comprises a plurality of fourth sections surrounding the plurality of radially arranged channel openings.

9 . The electric machine system of claim 8 , wherein each of the plurality of fourth sections surrounds one of the plurality of radially arranged channel openings.

10 . The electric machine system of claim 8 , wherein the first section and the plurality of fourth sections are closed shapes spaced away from one another.

11 . The electric machine system of claim 1 , wherein the sealing layer protrudes by a distance between 3 μm to 30 μm from the lamination layer base.

12 . The electric machine system of claim 1 , wherein the lamination layer base comprises metal and the sealing layer comprises a coating material with plastic and elastic properties such that the sealing layer matches a surface finish profile of the metal.

13 . A method for manufacture of a coated lamination layer of an electric motor, comprising:
preparing a metal sheet for coating to form a prepared metal sheet; coating the prepared metal sheet to form a coated metal sheet; blanking the coated metal sheet to form a coated blank; and cutting the coated blank to form the coated lamination layer.

14 . The method of claim 13 , wherein preparing the metal sheet for coating comprises cleaning the metal sheet, preparing the metal sheet for application of an adhesive, and treating areas of the metal sheet where a screen-printed coating is applied during coating the prepared metal sheet.

15 . The method of claim 13 , wherein coating the prepared metal sheet comprises screen-printing a coating onto the metal sheet to form a sealing layer on the metal sheet.

16 . The method of claim 13 , wherein coating the prepared metal sheet further comprises flowing the coating into pores of the metal sheet.

17 . The method of claim 13 , wherein cutting the coated blank comprises forming a plurality of slot openings and a plurality of channel openings.

18 . The method of claim 13 , wherein the method further comprises forming a stator by stacking a plurality of the coated lamination layer.

19 . A stator, comprising:
a plurality of coated lamination layers, wherein each of the plurality of coated lamination layers comprises: a lamination layer base including an annular shape with a center opening, a plurality of slot openings radially arranged about the center opening, and a plurality of channel openings radially arranged about the center opening; and a sealing layer comprising a screen-printed coating on a surface of the lamination layer base; wherein the plurality of coated lamination layers is stacked coaxially about a rotational axis such that the center openings align to form a bore, the slot openings align to form slots extending through the stator and the channel openings align to form channels; and wherein the screen-printed coating is positioned between adjacent lamination layer bases such that the screen-printed coating seals regions of the stator under axial compressive force.

20 . The stator of claim 19 , wherein the sealing layer protrudes axially from the surface of the lamination layer base, and wherein the screen-printed coating protrudes by a distance less than a thickness of the lamination layer base.

Assignees

• Dana Automotive Systems Group

Inventors

• Cook Christopher M
• Tyrus Jason M

Classifications

• H02K15/026

  Wound cores · CPC title

• H02K9/193

  with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium · CPC title

• H02K15/0273

  Laminating the cores · CPC title

• H02K15/027

  Punching the cores · CPC title

• H02K2215/00

  Specific aspects not provided for in other groups of this subclass relating to methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines · CPC title