Resistors, current sense resistors, battery shunts, shunt resistors, and methods of making
A plurality of resistors are disclosed herein. The resistor may include one or more resistive elements and a plurality of conductive portions. Openings or slots, which can be configured to adjust temperature coefficient or resistance (TCR) values of the resistor, are formed in the resistive elements. The shape, quantity, and orientation of the openings or slots can vary. In one aspect, header assemblies are provided for securing or holding pins relative to the resistors.
1. A resistor comprising:
a resistive element disposed between a first conductive portion and a second conductive portion;
a first temperature coefficient of resistance (TCR) adjustment opening provided through the first conductive portion and positioned in a first interior area of the resistor, a perimeter of the first TCR adjustment opening defined by at least a portion of the first conductive portion, the first TCR adjustment opening having one of a generally oblong, or generally oval, or generally oblong oval shape, wherein a profile, dimension, size, or shape of the first TCR adjustment opening is configured to adjust a TCR value of the resistor; and
a second temperature coefficient of resistance (TCR) adjustment opening provided through the second conductive portion and positioned in a second interior area of the resistor, a perimeter of the second TCR adjustment opening defined by at least a portion of the second conductive portion, the second TCR adjustment opening having a non-circular perimeter.
2. The resistor of claim 1 , wherein the second TCR adjustment opening has one of a generally oblong, or generally oval, or generally oblong oval shape.
3. The resistor of claim 1 , wherein the second TCR adjustment opening has one of a generally elongated or generally slotted profile.
4. The resistor of claim 1 , wherein a portion of the first TCR adjustment opening curves toward the resistive element.
5. The resistor of claim 4 , wherein a portion of second first TCR adjustment opening curves toward the resistive element.
6. The resistor of claim 1 , wherein at least a portion of the perimeter of the first TCR adjustment opening extends along a linear path.
7. The resistor of claim 6 , wherein the linear path extends in a transverse direction with respect to a longitudinal extension direction of the resistor.
8. The resistor of claim 6 , wherein at least a portion of the perimeter of the first TCR adjustment opening curves away from the resistive element.
9. The resistor of claim 6 , wherein a portion of the perimeter of the first TCR adjustment opening facing a first longitudinal side of the resistor is curved, and wherein a portion of the perimeter of the first TCR adjustment opening facing a second longitudinal side of the resistor opposite from the first longitudinal side is curved.
10. The resistor of claim 1 , wherein the first TCR adjustment opening has a greater dimension along a transverse direction than in a longitudinal direction of the resistor.
11. The resistor of claim 1 , further comprising a header assembly, the header assembly comprising at least one pin configured as a voltage sense pin, the at least one pin configured to contact at least a portion of the perimeter of the first TCR adjustment opening or at least a portion of the perimeter of the second TCR adjustment opening.
12. The resistor of claim 11 , wherein the at least one pin comprises a first pin positioned so as to contact at least a portion of the perimeter of the first TCR adjustment opening.
13. The resistor of claim 12 , wherein the header assembly further includes a second pin positioned so as to contact at least a portion of the perimeter of the second TCR adjustment opening, the second pin configured as a voltage sense pin.
14. The resistor of claim 13 , wherein the first pin and the second pin are positioned so as to contact respective portions of the perimeters of the first TCR adjustment opening and the second TCR adjustment opening that are closest to each other.
15. The resistor of claim 13 , wherein the first pin is soldered to at least a portion of the perimeter of the first TCR adjustment opening, and the second pin is soldered to at least a portion of the perimeter of the second TCR adjustment opening.
16. The resistor of claim 13 , wherein the header assembly further includes a third pin positioned so as to contact at least a portion of the second TCR adjustment opening at a position other than a position of the second pin, the third pin configured as a ground pin.
17. The resistor of claim 13 , wherein a portion of the first TCR adjustment opening curves toward the resistive element and wherein the first pin is positioned so as to contact the perimeter of the first TCR adjustment opening adjacent the portion the first TCR adjustment opening that curves toward the resistive element.
18. The resistor of claim 17 , wherein a portion of the second TCR adjustment opening curves toward the resistive element and wherein the second pin is positioned so as to contact the perimeter of the second TCR adjustment opening adjacent the portion the second TCR adjustment opening that curves toward the resistive element.
19. A resistor comprising:
a resistive element disposed between a first conductive portion and a second conductive portion;
a first temperature coefficient of resistance (TCR) adjustment opening extending through the first conductive portion and positioned in an interior area of the resistor;
a second temperature coefficient of resistance (TCR) adjustment opening extending through the second conductive portion and positioned in an interior area of the resistor; and
a third temperature coefficient of resistance (TCR) adjustment opening extending through the resistive element and at least one of the first conductive portion or the second conductive portion.
20. The resistor of claim 19 , wherein at least one of a first profile of the first TCR adjustment opening, a second profile of the second TCR adjustment opening, or a third profile of the third TCR adjustment opening, are configured to adjust a TCR value of the resistor.
21. The resistor according to claim 19 , wherein the first TCR adjustment opening and the second TCR adjustment opening are each formed having a continuously curved, non-linear, non-circular perimeter.
22. The resistor according to claim 19 , wherein the first TCR adjustment opening and the second TCR adjustment opening are each formed comprising an elongated slot having a continuous arc profile.
23. The resistor according to claim 19 , wherein the first TCR adjustment opening and the second TCR adjustment opening each have an oblong or oval profile.
24. The resistor according to claim 19 , wherein the first TCR adjustment opening and the second TCR adjustment opening each have at least portions having concave profiles relative to a direction of the resistive element.
25. The resistor according to claim 19 , wherein the third TCR adjustment opening extends for an entire longitudinal extent of the resistive element.
26. The resistor according to claim 19 , wherein a first portion of the third TCR adjustment opening is partially surrounded by a portion the first TCR adjustment opening, and a second portion of the third TCR adjustment opening is partially surrounded by a portion of the second TCR adjustment opening.