Elliptical Battery Cell Holder for Tolerance and Deformation Isolation
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Solution Overview
Problem
Cylindrical battery cases struggle to accommodate batteries of varying sizes within the dimensional tolerance range, causing deformation in one battery storage portion to affect adjacent portions, leading to improper storage of adjacent batteries.
Innovation Solution
The battery case is designed with elliptical cylindrical accommodating portions, where the longest long axis diameter is equal to or larger than the battery diameter, and includes slits and connection members to manage deformation and improve heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cylindrical battery storage portion deforms to expand the diameter to accommodate a battery with large dimensional tolerance, then the battery can be stored, but adjacent battery storage portions are deformed and cannot appropriately store batteries
Solution Approach 1:
The battery case is divided into multiple independent accommodating portions, each capable of deforming independently. The partition walls between portions include through-holes that allow localized deformation without transmitting stress to adjacent portions, enabling each portion to adapt to battery size variations independently while maintaining storage reliability of neighboring portions.
Solution Approach 2:
The partition walls are designed with through-holes at specific locations to provide localized flexibility where needed. This allows the wall to deform locally to accommodate battery dimensional variations while maintaining overall structural integrity and preventing deformation propagation to adjacent accommodating portions.
2Adaptability or versatility
If the battery storage portion deforms to expand diameter, then batteries within dimensional tolerance can be accommodated, but the deformation affects the shape of other adjacent storage portions
Solution Approach 1:
The partition walls are segmented with through-holes that allow independent deformation of each accommodating portion. This segmentation prevents the transmission of deformation forces to adjacent portions, maintaining their shape stability while allowing each portion to adapt to its own battery's dimensional characteristics.
3Shape
If rigid wall portions are used to maintain shape, then adjacent portions remain stable, but batteries with varying diameters cannot be properly accommodated
Solution Approach 1:
The partition walls incorporate through-holes at strategic locations to provide localized flexibility while maintaining overall structural rigidity. This allows the wall to deform locally to accommodate battery diameter variations while preserving the shape stability of adjacent accommodating portions through the rigid framework.
Solution Approach 2:
The partition walls are designed with through-holes that enable dynamic deformation in response to battery insertion. The walls can flex locally to accommodate size variations, then return to their original shape, providing adaptive accommodation while maintaining long-term shape stability.
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
The design allows for appropriate accommodation of cylindrical batteries with diameter expansion, reduces deformation, enhances heat transfer, and improves contact area for efficient heat dissipation.
Implementation Method 1
the wall portion in a state before accommodating the cylindrical battery cell defines an elliptical cylindrical space
Data Source
AI summary
A battery case is provided and including a plurality of accommodating portions each accommodating one cylindrical battery cell, the accommodating portions 11 being arranged side by side in one direction, in which each of the accommodating portions has a wall portion defining a space for accommodating the cylindrical battery cell, the wall portion in a state before accommodating the cylindrical battery cell defines an elliptical cylindrical space, a direction in which the accommodating portions are arranged in one direction is defined as a long axis direction of the elliptical cylindrical space, a direction perpendicular to the long axis direction is defined as a short axis direction, and a direction perpendicular to the long axis direction and the short axis direction and parallel to a central axis of the elliptical cylindrical space is defined as a depth direction, and a longest long axis diameter in the long axis direction of the elliptical cylindrical space in each of the accommodating portions 11 is equal to or larger than a diameter of the cylindrical battery cell.