Battery Wiring Module Case Coupling for Thermal Expansion Assembly
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Solution Overview
Problem
Existing battery wiring modules face challenges in assemblability due to the configuration of divided cases, which are typically coupled in a direction parallel to their installation, leading to difficulties in assembly and absorption of thermal expansion-related deformations.
Innovation Solution
The battery wiring module is designed with a coupling direction of adjacent divided cases along the assembly direction, allowing simultaneous assembly and coupling operations, featuring a first coupling portion as a hole and a second coupling portion as an extending portion, with a displacement allowing portion for relative movement, enhancing assemblability and deformation absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If divided cases are coupled in a direction parallel to their installation direction, then the structure can absorb thermal expansion deformations, but the assemblability of the case deteriorates
Solution Approach 1:
The patent changes the coupling direction from parallel to perpendicular relative to the installation direction. Specifically, the coupling portions are configured to couple adjacent divided cases in a direction perpendicular to the installation direction, transforming a one-dimensional assembly problem into a two-dimensional solution space. This dimensional change allows the cases to be coupled more easily while maintaining the ability to absorb thermal expansion through relative displacement in the installation direction.
2Reliability
If divided cases are coupled in a direction parallel to their installation direction, then thermal expansion deformations can be absorbed, but the assembly process becomes complex
Solution Approach 1:
The patent segments the coupling function into two independent aspects: (1) coupling adjacent divided cases together via coupling portions in a direction perpendicular to installation, and (2) allowing relative displacement in the installation direction to absorb thermal expansion. This segmentation separates the assembly operation from the deformation absorption function, simplifying the assembly process while maintaining connection reliability.
Solution Approach 2:
By configuring coupling portions to operate in a direction perpendicular to the installation direction, the patent adds a dimensional aspect to the coupling mechanism. This allows the assembly process to proceed in one direction while the deformation absorption occurs in another direction, reducing the complexity of the assembly process.
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 configuration improves assembly efficiency by allowing simultaneous assembly and coupling operations, effectively absorbing thermal expansion-induced deformations through parallel displacement of divided cases, thereby enhancing connection reliability and reducing module size.
Implementation Method 1
deformation caused by the thermal expansion of the battery and manufacturing tolerances of components can be absorbed by making the respective divided cases displaceable in the parallel installation direction
Data Source
AI summary
A case (22) includes a first divided case (31) and a second divided case (32) installed in parallel along an X direction. The first divided case (31) includes a first coupling portion (60). The second divided case (32) includes a second coupling portion (70) to be coupled to the first coupling portion (60). A coupling direction of the first coupling portion (60) and the second coupling portion (70) is a direction along an assembly direction (D) of the first divided case (31) and the second divided case (32) with a battery.