Resistor and method for making same
View Patent ↗A resistor includes a substantially cylindrical resistive element having a resistance of less than about 1 mΩ, a substantially cylindrical first termination electrically connected to the resistive element and a second termination electrically connected to the resistive element. The substantially cylindrical first termination is hollow to allow for accepting a connection such as from a battery cable. In addition there may be sense leads present on the resistor. A method of forming a substantially cylindrical resistor includes forming a hollow cylindrical resistor body by rolling a flat sheet comprising a resistive element and a first termination and a second termination joined on opposite ends of the resistive element.
1. A resistor comprising:
a cylindrical resistive element having a first end and a second end;
a first terminal adjacent the first end of the resistive element, the first terminal comprising a tube having a first end connected to the resistive element, and a second end comprising an opening facing away from the resistive element, the tube having at least one cylindrical wall encircling a longitudinal axis of the resistor;
a second terminal adjacent the second end of the resistive element;
a first sense lead electrically connected to the cylindrical wall of the first terminal and having at least a portion extending away from the longitudinal axis of the resistor; and
a second sense lead electrically connected to the second terminal and having at least a portion extending away from the longitudinal axis of the resistor.
2. The resistor of claim 1 , wherein the first sense lead is positioned between a central portion of the resistive element and an outer end of the first terminal.
3. The resistor of claim 2 , wherein the second sense lead is positioned between a central portion of the resistive element and an outer end of the second terminal.
4. The resistor of claim 1 , wherein the first terminal comprises a cylindrical opening adjacent the first end of the resistive element.
5. The resistor of claim 4 , wherein the cylindrical opening adjacent the first end of the resistive element receives at least a portion of the first end of the resistive element.
6. The resistor of claim 5 , wherein the first terminal comprises cylindrical walls of different diameters.
7. The resistor of claim 6 , wherein the opening of the second end of the tube axially receives an external connection, and wherein the external connection comprises a cable or battery post.
8. The resistor of claim 4 , wherein the second terminal comprises a cylindrical opening adjacent the second end of the resistive element.
9. The resistor of claim 8 , wherein the cylindrical opening adjacent the second end of the resistive element receives at least a portion of the second end of the resistive element.
10. The resistor of claim 1 , wherein the resistive element comprises a cylindrical wall encircling the longitudinal axis of the resistor.
11. The resistor of claim 1 , wherein the resistive element comprises a segment of resistance wire.
12. The resistor of claim 1 , further comprising a flat terminal portion.
13. A method of forming a resistor, comprising:
providing a cylindrical resistive element having a first end and an opposite second end between a first terminal adjacent the first end of the resistive element, and a second terminal adjacent the second end of the resistive element, the first terminal comprising a tube having a first end connected to the resistive element, and a second end comprising an opening facing away from the resistive element, the tube having at least one cylindrical wall encircling a longitudinal axis of the resistor;
electrically connecting a first sense lead to the cylindrical wall of the first terminal, at least a portion of the first sense lead extending away from the longitudinal axis of the resistor; and
electrically connecting a second sense lead to the second terminal, at least a portion of the second sense lead extending away from the longitudinal axis of the resistor.
14. The method of claim 13 , wherein step of electrically connecting comprises positioning the first sense lead between a central portion of the resistive element and an outer end of the first terminal.
15. The method of claim 14 , wherein step of electrically connecting comprises positioning the second sense lead between a central portion of the resistive element and an outer end of the second terminal.
16. The method of claim 13 , wherein the first terminal comprises a cylindrical opening adjacent the first end of the resistive element.
17. The method of claim 16 , wherein the cylindrical opening adjacent the first end of the resistive element receives at least a portion of the first end of the resistive element.
18. The method of claim 17 , wherein the tube is formed having cylindrical walls of different diameters.
19. The method of claim 18 , further comprising axially engaging an external connection within the opening at the second end of the first terminal, wherein the external connection comprises a cable or battery post.
20. The method of claim 16 , wherein the second terminal comprises a cylindrical opening adjacent the second end of the resistive element.
21. The method of claim 20 , wherein the cylindrical opening adjacent the second end of the resistive element receives at least a portion of the second end of the resistive element.
22. The method of claim 13 , wherein the resistive element comprises a cylindrical wall encircling the longitudinal axis of the resistor.
23. The method of claim 13 , wherein the resistive element comprises a segment of resistance wire.
24. The method of claim 13 , further comprising a flat terminal portion.