Cylindrical Battery Cell Holder With Anti-Rotation Beading Fit
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Solution Overview
Problem
Existing battery packs face instability issues due to rotational movement of cylindrical battery cells within the cell holder, leading to poor electrical connections and reduced process reliability.
Innovation Solution
The use of position regulating protrusions on the fixing support units of the cell holder, which protrude into the beading unit of the cylindrical battery cells, provides an interference fit to prevent rotation and ensure stable positioning, thereby maintaining electrical connectivity and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If cylindrical battery cells are placed in a cell holder without position regulating protrusions, then the device complexity is reduced, but the battery cells become unstable and can rotate within the holder
Solution Approach 1:
The cell holder incorporates position regulating protrusions at specific locations where they are needed to prevent rotation, rather than redesigning the entire holder structure. This localized addition provides the necessary stability while minimizing the increase in overall device complexity.
Solution Approach 2:
The position regulating protrusions act as intermediary elements between the cell holder and the battery cells. These protrusions fit into the beading units of the battery cells, serving as a mediating mechanism that prevents rotation without requiring direct complex interlocking between the holder and cells.
2Reliability
If position regulating protrusions are added to the cell holder, then rotational movement of battery cells is prevented, but the device complexity increases
Solution Approach 1:
Position regulating protrusions are added only to the specific fixing support units where rotational prevention is needed, rather than complicating the entire cell holder structure. This localized approach improves reliability of electrical connections while minimizing the increase in overall device complexity.
3Strength
If the position regulating protrusions are made to protrude deeper into the beading unit, then the interference fit is stronger and rotation is better prevented, but the manufacturing precision requirements increase
Solution Approach 1:
The design optimizes the dimensions of the position regulating protrusions and their corresponding beading units to achieve the necessary interference fit strength. By carefully selecting the protrusion depth and diameter parameters, the design achieves adequate rotational prevention while maintaining feasible manufacturing precision requirements.
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 solution stabilizes the cylindrical battery cells within the cell holder, enhancing the reliability of electrical connections and the overall processability of the battery pack by preventing rotational movement and ensuring secure fixing.
Implementation Method 1
The position regulating protrusions may be inserted into the beading unit using an interference fit method
Data Source
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AI summary
A battery pack includes cylindrical battery cells, each of the cylindrical battery cells including an electrode and an outer circumferential surface with a beading unit depressed into the outer circumferential surface to define a bottleneck in an inner direction of the outer circumferential surface, and a cell holder including fixing support units configured to support the cylindrical battery cells, each of the fixing support units covering at least a portion of the outer circumferential surface of a corresponding one of the cylindrical battery cells, and each of the fixing support units including at least one position regulating protrusion protruding toward the beading unit of the corresponding one of the cylindrical battery cells.