High voltage electrical terminal with compliant contact insert
An electrical connector includes a generally planar terminal and a U-shaped retainer. The electrical connector also includes a resilient spring disposed intermediate the terminal and the retainer. A contact insert distinct from the resilient spring is disposed intermediate the spring and the terminal. The contact insert defines an array of paired negative and positive protrusions. The spring is configured to exert a normal connection force on the array of paired negative and positive protrusions and form electrical contact points between the terminal and a planar mating terminal inserted into a gap between the spring and the contact insert through the array of paired negative and positive protrusions. An electrical connector assembly and a method of manufacturing such an electrical connector assembly are also provided.
1. An electrical connector, comprising:
a generally planar terminal;
a U-shaped retainer having a first side wall attached to the terminal, a second side wall separated from and substantially parallel to the first side wall, and an end wall interconnecting the first side wall and the second side wall, wherein the terminal is located intermediate the first side wall and the second side wall;
a resilient spring disposed intermediate the second side wall and the terminal and attached to the second side wall; and
a contact insert separate and distinct from the resilient spring, the contact insert defining an array of paired negative and positive protrusions, the negative protrusions being welded directly to the terminal, the spring being configured to exert a normal connection force on the array of paired negative and positive protrusions and form electrical contact points between the terminal and a planar mating terminal inserted into a gap between the spring and the contact insert through the array of paired negative and positive protrusions.
2. The electrical connector in accordance with claim 1 , wherein the terminal and the contact insert are formed of copper-based materials and the retainer and the spring are formed of steel materials.
3. The electrical connector in accordance with claim 1 , wherein the contact insert defines a plurality of strips that form the array of paired negative and positive protrusions and wherein the contact insert defines a plurality of slots between the plurality of strips.
4. The electrical connector in accordance with claim 3 , wherein the plurality of strips have an undulating shape that forms the array of paired negative and positive protrusions.
5. The electrical connector in accordance with claim 3 , wherein embossments on edges of the plurality of strips form the array of paired negative and positive protrusions.
6. The electrical connector in accordance with claim 5 , wherein the embossments form each protrusion in the array of paired negative and positive protrusions in the shape of a spherical quadrant.
7. The electrical connector in accordance with claim 1 , wherein the spring provides a majority of the normal connection force between the positive protrusions and the mating terminal.
8. An electrical connector assembly, comprising:
a generally planar first terminal;
a U-shaped retainer having a first side wall attached to terminal, a second side wall separated from and substantially parallel to the first side wall, and an end wall interconnecting the first side wall and the second side wall, wherein the terminal is arranged intermediate the first side wall and the second side wall;
a resilient spring disposed intermediate the second side wall and the terminal and attached to the second side wall;
a contact insert separate and distinct from the resilient spring that is disposed intermediate the spring and the terminal, the contact insert defining an array of paired negative and positive protrusions, the negative protrusions being welded directly to the terminal; and
a planar mating terminal inserted into a gap between the spring and the contact insert, the spring being configured to exert a normal connection force mating terminal and establish electrical contact points between the terminal and the mating terminal through the array of paired negative and positive protrusions of the contact insert.
9. The electrical connector assembly in accordance with claim 8 , wherein the terminal, the mating terminal, and the contact insert are formed of copper-based materials and the retainer and the spring are formed of steel materials.
10. The electrical connector assembly in accordance with claim 8 , wherein the contact insert defines a plurality of strips that form the array of paired negative and positive protrusions and wherein the contact insert defines a plurality of slots between the plurality of strips.
11. The electrical connector assembly in accordance with claim 10 , wherein the plurality of strips have an undulating shape that forms the array of paired negative and positive protrusions.
12. The electrical connector assembly in accordance with claim 10 , wherein embossments on edges of the plurality of strips form the array of paired negative and positive protrusions.
13. The electrical connector assembly in accordance with claim 8 , wherein the spring provides a majority of the normal connection force between the positive protrusions and the mating terminal.
14. The electrical connector assembly in accordance with claim 8 , further comprising a planar contact plate welded to the mating terminal and arranged intermediate the positive protrusions and the mating terminal.
15. A method of manufacturing an electrical connector assembly, comprising:
providing a generally planar terminal;
attaching a U-shaped retainer to the terminal;
arranging a resilient spring intermediate the terminal and the retainer;
forming a contact insert from a flat sheet of material to define an array of paired negative and positive protrusions, the contact insert being separate and distinct from the resilient spring;
welding the negative protrusions of the contact insert to the terminal;
arranging the contact insert between the spring and the terminal;
inserting a planar mating terminal into a gap between the spring and the contact insert;
exerting a normal connection force provided by the spring on the array of paired negative and positive protrusions; and
establishing electrical contact points between the terminal and the mating terminal through the array of paired negative and positive protrusions.
16. The method in accordance with claim 15 , further comprising creating a plurality of slots in the contact insert thereby forming a plurality of strips that provide the array of paired negative and positive protrusions.
17. The method in accordance with claim 16 , further comprising forming the strips to have an undulating shape that provides the array of paired negative and positive protrusions.
18. The method in accordance with claim 16 , further comprising embossing edges of the plurality of strips such that the array of paired negative and positive protrusions are formed in the shape of a spherical quadrant.