Electrical unit

• US 10,368,465 B2
• Filed: 09/07/2017
• Issued: 07/30/2019
• Est. Priority Date: 09/07/2017
• Status: Active Grant

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: Aragones Carrete, Alberto, Aparicio Rollan, Enric, Fernandez Banares, Jose Gabriel
• Primary Examiner(s): Vortman, Anatoly
• Assistant Examiner(s): Sul, Stephen S
• Application Number:
  US15/697,902
• Publication Number:
  US 20190075678A1
• Time in Patent Office: 691 Days
• Field of Search: 361611, 361624, 361637, 361675, 361676, 361775, 361748, 361704, 361707, 361713
• CPC Class Codes: B60R 16/0238 Electrical distribution centers
• CPC Class Codes: B60R 16/0239 Electronic boxes
• CPC Class Codes: H01R 13/41 by frictional grip in grommet, panel or base
• CPC Class Codes: H01R 9/2458 Electrical interconnections between terminal blocks
• CPC Class Codes: H02S 40/345 with cooling means associated with the electrical connection means, e.g. cooling means associated with or applied to the junction box cooling means for PV cells H01L31/052, for PV modules H02S40/42
• CPC Class Codes: H05K 1/119 Details of rigid insulating substrates therefor, e.g. three-dimensional details H05K1/117 takes precedence
• CPC Class Codes: H05K 2201/0999 Circuit printed on or in housing, e.g. housing as PCB; Circuit printed on the case of a component; PCB affixed to housing
• CPC Class Codes: H05K 7/02 Arrangements of circuit components or wiring on supporting structure
• CPC Class Codes: H05K 7/205 Heat-dissipating body thermally connected to heat generating element via thermal paths through printed circuit board [PCB] details of PCBs relating to heat transfer H05K1/0201
• CPC Class Codes: H05K 7/20854 Heat transfer by conduction from internal heat source to heat radiating structure H05K7/20863 takes precedence
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

An electrical unit includes a thermally conductive housing, an electrically insulating frame disposed in the thermally conductive housing, a plurality of bus bars disposed at least partially between a base wall of the thermally conductive housing and a first side of the electrically insulating frame, and a plurality of electrical components connected to a second side of the electrically insulating frame. At least one bus bar of the plurality of bus bars may be connected to the electrically insulating frame via one or more plastic rivets. Thermally conductive material may be disposed between at least one bus bar of the plurality of bus bars and a wall of the housing.

Claims

1. An electrical unit, comprising:

a thermally conductive housing comprising metal;

an electrically insulating frame disposed in the thermally conductive housing, the electrically insulating frame including a first side and a second side;

a plurality of bus bars disposed at least partially between a base wall of the thermally conductive housing and the second side of the electrically insulating frame; and

a plurality of electrical components connected to the first side of the electrically insulating frame;

wherein the electrically insulating frame includes a portion extending from the second side and in direct physical contact with the base wall of the thermally conductive housing.

2. The electrical unit of claim 1, wherein at least one bus bar of the plurality of bus bars is connected to the electrically insulating frame via one or more plastic rivets integrally formed with the electrically insulating frame.

3. The electrical unit of claim 1, wherein thermally conductive material is disposed between and in contact with at least one bus bar of the plurality of bus bars and the base wall of the thermally conductive housing to facilitate heat dissipation from the plurality of electrical components through the plurality of bus bars to the thermally conductive housing.

4. The electrical unit of claim 3, wherein the thermally conductive material is thermally conductive and electrically isolating, includes adhesive properties, and is applied to substantially an entire bottom surface of each bus bar of the plurality of bus bars.

5. The electrical unit of claim 1, wherein at least one bus bar of the plurality of bus bars includes a base section connected to the second side of the electrically insulating frame, an angled section extending through the electrically insulating frame, and a connection section disposed at the first side of the electrically insulating frame and connected with at least one electrical component of the plurality of electrical components.

6. The electrical unit of claim 1, wherein the metal is aluminum.

7. The electrical unit of claim 6, including a circuit board;

wherein the electrically insulating frame includes a plurality of mounting posts supporting the circuit board above a base of the electrically insulating frame.

8. The electrical unit of claim 1, wherein at least one bus bar of the plurality of bus bars includes a current capacity of at least 50 amps.

9. The electrical unit of claim 1, including a plurality of formations or protrusions extending from the thermally conductive housing;

wherein the electrically insulating frame is connected to the thermally conductive housing via the plurality of formations or protrusions.

10. The electrical unit of claim 9, wherein the formations or protrusions are electrically insulating and thermally conducting.

11. The electrical unit of claim 1, wherein an electrical component of the plurality of electrical components includes a terminal that extends through an aperture in the electrically insulating frame, and the terminal is connected to a bus bar of the plurality of bus bars.

12. The electrical unit of claim 1, wherein at least one bus bar of the plurality of bus bars is inserted into the electrically insulating frame while the electrically insulating frame is injection molded.

13. The electrical unit of claim 1, wherein the second side of the electrically insulating frame includes a plurality of bus bar walls electrically isolating the plurality of bus bars.

14. The electrical unit of claim 13, wherein a minimum thickness of the bus bar walls corresponds to an expected electrical current associated with the plurality of bus bars.

15. The electrical unit of claim 14, wherein a height of the bus bar walls corresponds to the expected electrical current to ensure a minimum separation distance between the plurality of bus bars and the thermally conductive housing.

16. The electrical unit of claim 1, wherein base sections of the plurality of bus bars are disposed substantially in a common plane.

17. The electrical unit of claim 16, wherein the base sections are disposed in parallel with the base wall of the thermally conductive housing and in parallel with a base of the electrically insulating frame.

18. A method of assembling an electrical unit, the method comprising:

providing an electrically insulating frame having a first side and a second side;

connecting a plurality of electrical components to the first side of the electrically insulating frame;

connecting a plurality of bus bars to the second side of the electrically insulating frame;

providing a thermally conductive housing having a base wall; and

connecting the bus bars to the base wall of the thermally conductive housing;

wherein the thermally conductive housing comprises metal;

wherein the electrically insulating frame includes a portion extending from the second side and in direct physical contact with the base wall of the thermally conductive housing.

19. The method of claim 18, wherein connecting the bus bars to the base wall of the thermally conductive housing includes providing a thermally conductive and electrically insulating material to (i) the plurality of bus bars, and (ii) the base wall of the thermally conductive housing.