Battery Cell Assembly Stacking to Prevent Conductive Portion Cracking
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Solution Overview
Problem
The assembly process of battery cells is cumbersome, leading to low efficiency and a high risk of conductive portion cracking due to tension during transportation and assembly.
Innovation Solution
A method involving stacking cell assemblies in a perpendicular direction for electrical connection and housing insertion, with pre-connected gathering portions and support structures to maintain stability and reduce area occupancy, ensuring consistent posture throughout the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell assemblies are assembled in a traditional flat layout, then the assembly process is simple, but the assembly area is large and conductive portions are prone to tension and cracking
Solution Approach 1:
The patent transitions from a traditional flat two-dimensional assembly layout to a three-dimensional stacked configuration. Cell assemblies are stacked vertically with conductive portions extending in the vertical direction, reducing the horizontal assembly area while maintaining connection reliability. This dimensional change allows multiple cell assemblies to be connected in series/parallel within a compact vertical space, eliminating the tension issues associated with flat layouts.
2Area of stationary object
If cell assemblies are stacked vertically for electrical connection, then the assembly area is reduced, but the assembly procedure becomes more complex
Solution Approach 1:
The patent implements preliminary gathering of conductive portions before the stacking operation. Conductive portions from multiple cell assemblies are pre-collected and positioned at the top of the stack, then connected in a single batch operation. This preliminary action simplifies the overall procedure by avoiding multiple individual connection operations that would be required in a step-by-step stacking approach.
3Reliability
If cell assemblies are conveyed individually, then the assembly process is flexible, but the risk of conductive portion tension and cracking increases
Solution Approach 1:
The patent merges multiple cell assemblies into a stacked configuration where they are conveyed together as a single unit. The cell assemblies are stacked vertically and conveyed simultaneously on the logistics line, with conductive portions connected before conveyance. This merging eliminates the tension and cracking risks associated with individual conveyance while maintaining production efficiency through batch processing.
Data Source
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AI summary
An assembly method and an assembly apparatus. The assembly method is used for assembling a battery unit; the battery unit comprises a housing and a plurality of battery cell assemblies connected in series and/or in parallel and accommodated in the housing; each battery cell assembly comprises an active substance coating part and a conductive part; the conductive part is located at one end of the battery cell assembly in the first direction and is used for electrically connecting the active substance coating part and an electrode post of the battery unit; the assembly method comprises the following steps: stacking the plurality of battery cell assemblies in a second direction, the second direction being perpendicular to the first direction; electrically connecting the conductive pats of the plurality of battery cell assemblies; and placing the plurality of battery cell assemblies into the housing.