Battery Wiring Module Cover Overlap for Thermal Expansion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In battery wiring modules, the distance between case bodies increases due to heat expansion, risking exposure of electric wires between covers.
Innovation Solution
A battery wiring module design with overlapping covers and engaging portions that maintain alignment, preventing gaps and exposure of electric wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If case bodies are spaced apart to accommodate thermal expansion of the secondary battery, then the battery module can withstand heat expansion, but gaps form between covers and electric wires become exposed
Solution Approach 1:
The patent applies dimensional change by making the covers extend in the width direction (perpendicular to the lengthwise expansion direction) to create overlapping portions. This allows the covers to maintain coverage over the electric wires even when case bodies move apart in the lengthwise direction due to thermal expansion, thus preventing wire exposure while accommodating battery expansion.
Solution Approach 2:
The covers are designed with preliminary extension beyond the case bodies in the width direction, creating overlapping portions before thermal expansion occurs. This preliminary action ensures that when the battery expands and case bodies move apart, the extended covers already in place continue to cover the electric wires, preventing exposure without requiring active adjustment during expansion.
2Object-affected harmful factors
If covers are extended to prevent wire exposure, then wire protection is improved, but device complexity increases
Solution Approach 1:
The extended covers serve multiple functions: they cover the electric wires passing through the case bodies, prevent wire exposure during thermal expansion, and provide structural support for the battery module. This multi-functionality allows the cover extension to prevent wire exposure without proportionally increasing device complexity, as the same structural element performs multiple protective roles.
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
Prevents electric wires from being exposed by maintaining cover alignment during thermal expansion, ensuring reliable electrical connection.
Implementation Method 1
when the secondary battery thermally expands along the lengthwise direction of the electric wire, the case bodies and the covers move along the lengthwise direction of the electric wire, accompanying the heat expansion of the secondary battery
Data Source
AI summary
A case of a battery wiring module includes a first case body that has a groove-like first wire insertion portion, a second case body that has a groove-like second wire insertion portion, a first cover that covers an opening of the first wire insertion portion, and a second cover that covers an opening of the second wire insertion portion. The first wire insertion portion and the second wire insertion portion are provided in parallel along the lengthwise direction of an electric wire. In addition, the opening of the first wire insertion portion and the opening of the second wire insertion portion are open in the same direction. The case also includes an overlapping portion in which the first cover and the second cover overlap each other in the opening direction of opening of first and second wire insertion portions.