Parallel Shunt Resistor Structure for Lower Resistance Welding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional shunt resistors face difficulties in lowering the resistance value without compromising the welding process, as narrowing the resistive body's width makes it challenging to join the resistive body with the base materials, and methods to reduce volume to adjust resistance values are ineffective in lowering them.
Innovation Solution
Incorporating a second resistive body joined to the base materials at a position different from the first resistive body, either in contact or non-contact, to increase the joining area and thus lower the resistance value without altering the width of the first resistive body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the width of the resistive body is narrowed to lower the resistance value, then the resistance value decreases, but the welding process becomes extremely difficult
Solution Approach 1:
The invention divides the resistive body into two separate components: a first resistive body and a second resistive body. The first resistive body maintains a sufficient width for reliable welding to the base materials, while the second resistive body is added to reduce the overall resistance value. This segmentation allows each component to fulfill its specific function without compromising the other.
Solution Approach 2:
Instead of reducing the width (one-dimensional solution) of the resistive body, the invention adds another resistive body in a different spatial arrangement. The second resistive body is positioned adjacent to the first resistive body and connected in parallel, creating a two-resistive-body structure that lowers resistance without affecting the welding dimensions.
2Manufacturing precision
If the volume of the resistive body is reduced to adjust the resistance value, then the resistance value increases, but the resistance value cannot be lowered
Solution Approach 1:
The invention combines two resistive bodies (first and second) connected in parallel between the same two base materials. This merging of parallel pathways allows the overall resistance to be lowered below what either individual resistive body could achieve alone, while maintaining manufacturing feasibility.
3Manufacturing precision
If a second resistive body is added to lower the resistance value, then the resistance value decreases, but the device structure becomes more complex
Solution Approach 1:
The second resistive body serves multiple functions: it lowers the overall resistance value, provides an additional current pathway to reduce heat generation, and can be positioned to optimize thermal management. This multi-functionality justifies the added structural element.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for a simple and effective reduction in resistance value, reducing heat generation temperature and improving current flow, while maintaining the same width as conventional designs, and can be adjusted by modifying the second resistive body's area or shape.
Implementation Method 1
a first resistive body (10), two base materials (11) sandwiching the first resistive body (10) therebetween and joined to the first resistive body (10) by welding (Y1), and a second resistive body (12, 12B, 12C, 12D) joined to the two base materials (11) by welding (Y2, Y2B, Y2C, Y2D) at a position different from the first resistive body (10)
Implementation Method 2
joined to the two base materials (11) by welding (Y2, Y2B, Y2C, Y2D)
Implementation Method 3
when a current flows through the shunt resistor 100 as described above, the resistive body 101 generates heat, and the resistance value of the resistive body 101 changes depending on the heat generation temperature
Data Source
AI summary
A shunt resistor the resistive value of which can be lowered simply and easily has: a first resistive body, two base materials that sandwich the first resistive body therebetween and are joined by a welding to the first resistive body, and a second resistive body joined by a welding to the two base materials at different positions from the first resistive body. In addition, the second resistive body can come into contact with the first resistive body.