Coldplate with integrated DC link capacitor for cooling thereof

• US 9,615,490 B2
• Filed: 07/22/2015
• Issued: 04/04/2017
• Est. Priority Date: 05/15/2014
• Status: Active Grant

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: Topolewski, John N., Duco, Michael Scott, Brar, Parminder, Rai, Rutunj
• Primary Examiner(s): Smith, Courtney
• Assistant Examiner(s): MATEY, MICHAEL A
• Application Number:
  US14/805,664
• Publication Number:
  US 20150334875A1
• Time in Patent Office: 622 Days
• CPC Class Codes: H02B 1/01 Frameworks
• CPC Class Codes: H02B 1/56 Cooling; Ventilation
• CPC Class Codes: H05K 7/20254 Cold plates transferring heat from heat source to coolant
• CPC Class Codes: H05K 7/20927 Liquid coolant without phase change

Abstract

A coldplate for use with an inverter of an electric vehicle includes a coldplate member. The coldplate member includes a pocket configured to receive a DC link capacitor of the inverter therein. The pocket is sized to surround the DC link capacitor when the DC link capacitor is received within the pocket to thereby provide physical integration of the DC link capacitor in the coldplate member.

Claims

1. An assembly comprising:

a capacitor having a plurality of film capacitors, wherein the capacitor is not encapsulated within its own casing such that the film capacitors are exposed to an environment external to the capacitor;

a coldplate including a coldplate member including a pocket configured to receive the capacitor therein, the pocket being sized to surround the capacitor when the capacitor is received within the pocket to thereby provide physical integration of the capacitor in the coldplate member;

wherein the capacitor is received within the pocket to thereby be physically integrated in the coldplate; and

a potting material received within the pocket, the potting material substantially surrounding the film capacitors of the capacitor, wherein the potting material facilitates heat transfer from the film capacitors to the coldplate member via the pocket, provides electrical isolation to the film capacitors, and mechanically supports the film capacitors.

2. The assembly of claim 1 further comprising:

a second coldplate member; and

wherein the coldplate members are adapted to be joined together to form a manifold therebetween proximate to the pocket to receive a fluid for use in cooling the capacitor when the capacitor is received within the pocket.

3. The assembly of claim 1 wherein:

the pocket has a depth corresponding to a height of the capacitor.

4. The assembly of claim 1 wherein:

the pocket has a shape corresponding to a shape of the capacitor.

5. The assembly of claim 1 wherein:

the pocket includes a floor and one or more walls, the floor of the pocket being arranged on a side of the coldplate member and the walls of the pocket extending from the floor of the pocket outward from the side of the coldplate member whereby the pocket opens outward from the side of the coldplate member.

6. An assembly for an electric vehicle, the assembly comprising:

an inverter including a naked DC link capacitor having a stack of film capacitors and lacking an encapsulation housing such that the film capacitors are exposed to an environment external to the naked DC link capacitor;

a coldplate including a coldplate member having a pocket;

wherein the naked DC link capacitor is received within the pocket to thereby be physically integrated in the coldplate; and

a potting material received within the pocket, the potting material substantially surrounding the film capacitors of the naked DC link capacitor, wherein the potting material facilitates heat transfer from the film capacitors to the coldplate member via the pocket, provides electrical isolation to the film capacitors, and mechanically supports the film capacitors.

7. The assembly of claim 6 wherein:

the pocket includes a floor and one or more walls, the floor of the pocket being arranged on a side of the coldplate member and the walls of the pocket extending from the floor of the pocket outward from the side of the coldplate member whereby the pocket opens outward from the side of the coldplate member.

8. The assembly of claim 6 wherein:

the coldplate further includes a second coldplate member; and

the coldplate members are adapted to be joined together to form a manifold therebetween proximate to the pocket to receive a fluid for use in cooling the naked DC link capacitor.

9. The assembly of claim 6 wherein:

the pocket has a shape corresponding to a shape of the naked DC link capacitor.