Electric module, electrical system comprising such an electric module, and corresponding production methods

Patent metadata

Field	Value
Publication number	US-10912223-B2
Application number	US-201415027920-A
Country	US
Kind code	B2
Filing date	Oct 9, 2014
Priority date	Oct 9, 2013
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

The method for producing the electric module comprises: securing at least one first electrical component ( 108, 110 ) to a first plate ( 102 ); then assembling each first electrical component ( 108, 110 ) to an electrical connection bar ( 104 ) to which at least one second component ( 120 ) is already secured.

First claim

The invention claimed is:

1. A method for production of an electric module comprising:
a first step comprising:
fixing at least one first electrical component to a first plate by:
depositing a bonding compound between the at least one first electrical component and the first plate, the bonding compound having a polymerization temperature, and
heating the bonding compound to a temperature superior or equal to the polymerization temperature of the bonding compound, the bonding compound being polymerized after the bonding compound is deposited and heated, and

after the first step, a second step comprising:
assembling the at least one first electrical component to an electrical connecting bar to which a second electrical component is already fixed,

wherein the second electrical component has a maximum normal operating temperature lower than the polymerization temperature of the bonding compound, and
wherein the assembly of the first electrical component with the electrical connecting bar comprises:
the positioning of a first portion of the electrical connecting bar on the first electrical component, opposite to the first plate, such that the first electrical component ends up between the electrical connecting bar and the first plate, and
the fixing of the electrical connecting bar to the first plate by a second portion of the electrical connecting bar, said second portion extending from the first portion to the first plate.

2. The production method as claimed in claim 1 , in which the assembly of the first electrical component with the electrical connecting bar comprises the fixing of the first electrical component to the electrical connecting bar.

3. The production method as claimed in claim 1 , in which the electrical connecting bar comprises a plastic coating around at least one electrical conductor.

4. The production method as claimed in claim 1 , in which said second portion of the electrical connecting bar is integral to a plastic coating.

5. The production method as claimed in claim 1 , in which the first plate is designed to dissipate a heat generated by the first electrical component and/or a heat generated by the second electrical component during their operation.

6. A method for production of an electrical system, comprising:
fabricating the electric module according to the method as claimed in claim 1 ;
fixing the first plate to a second plate designed to dissipate a heat from the electric module,
wherein a channel for the circulation of coolant liquid and an access opening into the channel are formed in the second plate, and in which the first plate is fixed to the second plate in such a manner as to cover the opening, in order for the coolant liquid to come into contact with the first plate.

7. The method as claimed in claim 1 , wherein the electrical connecting bar is embedded in a plastic coating, which is positioned over the first electrical component and on the opposite side with respect to the first plate.

8. The production method as claimed in claim 3 , in which the second electrical component is fixed to the plastic coating, by overmolding of the plastic coating over the second electrical component and/or by means of a fixing mechanism.

9. The production method as claimed in claim 6 , in which the first plate is equipped with projections designed to extend into the opening after the first plate has been fixed to the second plate.

10. An electric module, comprising:
a first plate;
an electrical connecting bar;
a first electrical component mounted onto the electrical connecting bar, the first electrical component being furthermore fixed to the first plate by a polymerized bonding compound, the bonding compound having a certain polymerization temperature; and
a second electrical component fixed to the electrical connecting bar, the second electrical component having a maximum normal operating temperature lower than the polymerization temperature of the bonding compound, and
wherein an assembly of the first electrical component with the electrical connecting bar comprises:
a first portion of the electrical connecting bar positioned on the first electrical component, opposite to the first plate, such that the first electrical component ends up between the electrical connecting bar and the first plate,
a second portion of the electrical connecting bar that fixes the electrical connecting bar to the first plate, said second portion extending from the first portion to the first plate.

11. An electrical system, comprising:
the electric module as claimed in claim 10 ; and
a second plate to which the first plate is fixed, the second plate being configured to dissipate a heat from the electric module.

12. The electric module as claimed in claim 10 , wherein the electrical connecting bar is embedded in a plastic coating, which is positioned over the first electrical component and on the opposite side with respect to the first plate.

13. The electrical system as claimed in claim 11 , further comprising a housing enclosing the electric module, the second plate forming a base of the housing.

14. The electrical system as claimed in claim 11 , further comprising at least a third electrical component fixed to the second plate independently of the electric module.

15. A method for production of an electric system, comprising:
fabricating an electric module using a method for production of the electric module comprising:
a first step comprising:
fixing at least one first electrical component to a first plate by:
depositing a bonding compound between the at least one first electrical component and the first plate, the bonding compound having a polymerization temperature, and
heating the bonding compound to a temperature superior or equal to the polymerization temperature of the bonding compound, the bonding compound being polymerized after the bonding compound is deposited and heated, and

a second step comprising assembling the at least one first electrical component to an electrical connecting bar to which a second electrical component is already fixed; and

fixing the first plate to a second plate designed to dissipate a heat from the electric module,
wherein the second electrical component has a maximum normal operating temperature lower than the polymerization temperature of the bonding compound, and
wherein a channel for the circulation of coolant liquid and an access opening into the channel are formed in the second plate, and in which the first plate is fixed to the second plate in such a manner as to cover the opening, in order for the coolant liquid to come into contact with the first plate.

Assignees

• Valeo Systemes De Controle Moteur
• Valeo Siemens Eautomotive France Sas

Inventors

• Govindassamy Valery
• Schwartz Christian
• Deniot Roger

Classifications

• H05K7/20254 Primary

  Cold plates transferring heat from heat source to coolant · CPC title

• H05K7/14329

  specially adapted for the configuration of power bus bars · CPC title

• H05K1/0272 Primary

  Adaptations for fluid transport, e.g. channels, holes · CPC title

• H05K2201/10409

  Screws · CPC title

• H05K1/0203

  Cooling of mounted components (H05K1/0272 takes precedence) · CPC title