Coldplate for use with a transformer in an electric vehicle (EV) or a hybrid-electric vehicle (HEV)

• US 8,902,582 B2
• Filed: 05/22/2012
• Issued: 12/02/2014
• Est. Priority Date: 05/22/2012
• Status: Active Grant

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: Yalamanchili, Venkat, Rai, Rutunj
• Primary Examiner(s): Datskovskiy, Michail V
• Application Number:
  US13/477,584
• Publication Number:
  US 20130312930A1
• Time in Patent Office: 924 Days
• Field of Search: 361/679.46, 361/679.53, 361/679.54, 361/702, 361/704, 361/705, 361/707, 361/709, 361/710, 361/712, 361/714, 361/715, 361/719, 361/760, 361/766, 361/768, 165/80.2, 165/80.3, 165/80.4, 165/80.5, 165/104.33, 165/104.34, 165/67.2, 165/185, 257706-727, 174/15.1, 174/16.3, 174/252, 363/64, 363/65, 363/56.02, 363141-147, 363/137, 307/11, 307/38, 307/9.1, 307/10.1, 307/43, 307/82, 307/115, 336/60, 336/61, 336/200, 336/232
• US Class Current: 361/679.54
• CPC Class Codes: F28D 2021/0028 for cooling heat generating elements, e.g. for cooling electronic components or electric devices for cooling semiconductors H01L23/34, for cooling electric apparatus H05K7/20
• CPC Class Codes: F28F 3/12 Elements constructed in the shape of a hollow panel, e.g. with channels F28D1/02, F28D1/03 take precedence
• CPC Class Codes: H01F 27/22 Cooling by heat conduction through solid or powdered fillings

Abstract

A coldplate for use with a transformer in an electric vehicle (EV) or a hybrid-electric vehicle (HEV). The coldplate includes a main portion having a recess formed therein, the recess having a floor configured for contacting a bottom surface of a transformer for dissipating heat generated by the transformer. The main portion includes a raised feature configured for contacting a winding of the transformer for dissipating heat generated by the transformer. The coldplate also includes a bracket member for use in securing the transformer in the recess of the main portion, the bracket member configured for contacting the main portion and the transformer for dissipating heat generated by the transformer. The bracket member includes a contact surface for contacting a top surface of the transformer, the contact surface having an area sufficient to contact substantially all of the top surface of the transformer.

Claims

1. A coldplate for use with a transformer in an electric vehicle (EV) or a hybrid-electric vehicle (HEV), the transformer comprising a first magnetic core, a second magnetic core and a winding, the transformer having a top surface and a bottom surface, the coldplate comprising:

a main portion having a recess formed therein, the recess having a floor configured for contacting the bottom surface of the transformer for dissipating heat generated by the transformer, the main portion comprising a raised feature configured for contacting the winding of the transformer for dissipating heat generated by the transformer; and

a bracket member for use in securing the transformer in the recess of the main portion of the coldplate, the bracket member configured for contacting the main portion and the transformer for dissipating heat generated by the transformer, the bracket member having a contact surface for contacting the top surface of the transformer, the contact surface having an area sufficient to contact substantially all of the top surface of the transformer.

2. The coldplate of claim 1 wherein the main portion further comprises an attachment feature, and the bracket member comprises an attachment feature for cooperating with the attachment feature of the main portion for use in attaching the bracket member to the main portion.

3. The coldplate of claim 1 wherein the transformer has a plurality of side surfaces and the recess formed in the main portion has a plurality of side surfaces configured for contacting the plurality of side surfaces of the transformer for dissipating heat generated by the transformer.

4. The coldplate of claim 3 wherein the bracket member has a further contact surface for contacting a side surface of the transformer for dissipating heat generated by the transformer, the further contact surface having an area sufficient to contact a majority of the side surface of transformer.

5. The coldplate of claim 1 wherein transformer has a plurality of side surfaces and the bracket member has a further contact surface for contacting a side surface of the transformer for dissipating heat generated by the transformer, the further contact surface having an area sufficient to contact a majority of the side surface of the transformer.

6. The coldplate of claim 1 wherein the top and bottom surfaces of the transformer are configured for direct contact with the bracket member and the floor of the recess.

7. The coldplate of claim 1 wherein the top and bottom surfaces of the transformer are configured for indirect contact with the bracket member and the floor of the recess.

8. The coldplate of claim 7 further comprising a thermal interface material interposed between the top surface of the transformer and the bracket member, and interposed between the bottom surface of the transformer and the floor of the recess, the thermal interface material for facilitating heat conduction from the transformer to the coldplate.

9. The coldplate of claim 3 wherein the winding of the transformer comprises a printed circuit board having a stamped copper coil, a portion of the winding extends beyond the side surfaces of the transformer, and the portion of the winding extending beyond the side surfaces of the transformer is configured for contacting the raised feature of the main portion of the coldplate for dissipating heat generated by the transformer.

10. A heat sink for use with a transformer in an electric vehicle (EV) or a hybrid-electric vehicle (HEV), the transformer comprising a winding, an upper magnetic core and a lower magnetic core, wherein the upper magnetic core forms a top surface of the transformer, the lower magnetic core forms a bottom surface of the transformer, and the upper and lower magnetic cores form a plurality of side surfaces of the transformer, the heat sink comprising:

a main portion having a recess formed therein, the recess having a floor configured for contacting the bottom surface of the transformer for dissipating heat generated by the transformer, the main portion comprising a raised feature configured for contacting the winding of the transformer, wherein the winding of the transformer comprises a printed circuit board having a stamped copper coil, a portion of the winding extends beyond the side surfaces of the transformer formed by the upper and lower magnetic cores, and the portion of the winding extending beyond the side surfaces of the transformer is configured for contacting the raised feature of the main portion of the heat sink for dissipating heat generated by the transformer; and

a bracket member for use in securing the transformer in the recess of the main portion of the coldplate, the bracket member configured for contacting the main portion and the transformer for dissipating heat generated by the transformer, the bracket member having a contact surface for contacting the top surface of the transformer, the contact surface having an area sufficient to contact substantially all of the top surface of the transformer.

11. The heat sink of claim 10 wherein the bracket member has a further contact surface for contacting a side surface of the transformer for dissipating heat generated by the transformer, the further contact surface having an area sufficient to contact a majority of the side surface of the transformer.

12. The heat sink of claim 10 wherein the top and bottom surfaces of the transformer are configured for direct contact with the bracket member and the floor of the recess.

13. The heat sink of claim 10 wherein the top and bottom surfaces of the transformer are configured for indirect contact with the bracket member and the floor of the recess.

14. The heat sink of claim 13 further comprising a thermal interface material interposed between the top surface of the transformer and the bracket member, and interposed between the bottom surface of the transformer and the floor of the recess, the thermal interface material for facilitating heat conduction from the transformer to the coldplate.

15. The heat sink of claim 10 wherein the main portion has a substantially plate-like shape.

16. A heat sink for use with a transformer in an electric vehicle (EV) or a hybrid-electric vehicle (HEV), the transformer comprising a winding, an upper magnetic core and a lower magnetic core, wherein the upper magnetic core forms a top surface of the transformer, the lower magnetic core forms a bottom surface of the transformer, and the upper and lower magnetic cores form a plurality of side surfaces of the transformer, the heat sink comprising:

a main portion having a recess formed therein, the recess having a floor configured for contacting the bottom surface of the transformer for dissipating heat generated by the transformer, the main portion comprising a raised feature configured for contacting the winding of the transformer for dissipating heat generated by the transformer;

a bracket member for use in securing the transformer in the recess of the main portion of the heat sink, the bracket member configured for contacting the main portion and the transformer for dissipating heat generated by the transformer, the bracket member having a first contact surface for contacting the top surface of the transformer, the first contact surface having an area sufficient to contact substantially all of the top surface of the transformer, and a second contact surface for contacting a side surface of the transformer, the second contact surface having an area sufficient to contact a majority of the side surface of the transformer; and

a thermal interface material interposed between the top surface of the transformer and the bracket member, and interposed between the bottom surface of the transformer and the floor of the recess, the thermal interface material for facilitating heat conduction from the transformer to the main portion and the bracket member.

17. The heat sink of claim 16 wherein the main portion has a substantially plate-like shape.

18. The heat sink of claim 16 wherein the main portion further comprises an attachment feature on the surface thereof, and the bracket member comprises an attachment feature for cooperating with the attachment feature of the main portion for use in attaching the bracket member to the main portion.

19. The heat sink of claim 16 wherein the recess formed in the main portion has a plurality of side surfaces configured for contacting the plurality of side surfaces of the transformer for dissipating heat generated by the transformer.

20. The heat sink of claim 16 wherein the winding of the transformer comprises a printed circuit board having a stamped copper coil, a portion of the winding extends beyond the side surfaces of the transformer formed by the upper and lower magnetic cores, and the portion of the winding extending beyond the side surfaces of the transformer is configured for contacting the raised feature of the main portion of the heat sink for dissipating heat generated by the transformer.