Battery Cell Pack End Plate Positioning for Precise Stacking
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Solution Overview
Problem
The assembly of battery cell packs is hindered by inaccurate positioning of end plates and cells, leading to reduced efficiency and precision.
Innovation Solution
The use of limiting protrusions on the end plate and recesses on the cell to facilitate precise positioning, allowing for quick and accurate alignment of the end plate and cell, followed by stacking in a specific direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If end plates are bonded to cells without positioning structures, then the bonding process is simple, but positioning accuracy deteriorates leading to misalignment
Solution Approach 1:
The limiting protrusion and recess form a self-positioning mechanism that automatically aligns the end plate with the cell during assembly, eliminating the need for external positioning devices or complex alignment procedures. The structure serves its own positioning function through its geometric features.
Solution Approach 2:
The positioning function is segmented from the bonding process by introducing separate geometric features (limiting protrusion and recess) that handle positioning independently. This allows the bonding operation to focus on attachment while positioning is handled by the mechanical interfit of the protrusion and recess.
2Manufacturing precision
If traditional bonding methods are used without positioning features, then the assembly process is fast, but assembly precision deteriorates
Solution Approach 1:
The limiting protrusion and recess are pre-formed on the end plate and cell respectively, establishing the positioning relationship before the bonding operation begins. This preliminary positioning action ensures precision is achieved before the actual assembly bonding takes place.
Solution Approach 2:
The positioning features automatically guide and align the components during assembly without requiring additional positioning operations or tools. The structure itself performs the positioning function, maintaining both speed and precision.
3Manufacturing precision
If multiple cells are stacked without positioning structures, then stacking is simple, but positioning accuracy deteriorates
Solution Approach 1:
The positioning function is segmented into discrete geometric features (limiting protrusion and recess) that can be independently formed on each cell and end plate. This modular positioning approach allows consistent precision across multiple stacked cells without requiring complex inter-cell positioning mechanisms.
Solution Approach 2:
The limiting protrusion and recess design serves multiple functions: it positions the end plate relative to the cell, maintains alignment during bonding, and ensures proper stacking orientation. This universal positioning feature works consistently across all cells in the stack.
Data Source
AI summary
A battery cell pack and an assembly method of the battery cell pack are provided. The battery cell pack includes an end plate and at least one cell. The end plate is provided with a limiting protrusion. The cell is provided with a recess. At least part of the limiting protrusion is located in the recess to position the end plate and the cell.