Battery Cell Terrace Alignment to Prevent Electrode Lead Overlap
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Solution Overview
Problem
The assembly quality between electrode leads of battery cells is compromised due to overlapping, leading to potential short circuits and shape deformation issues in battery cell assemblies, particularly exacerbated by the springback phenomenon of external materials like aluminum films.
Innovation Solution
An arrangement apparatus with terrace arrangement members and movement portions is employed to position battery cells accurately, applying compressive residual stress to terrace regions, thereby preventing deformation and ensuring proper alignment of electrode leads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If battery cells are stacked or arranged to form a battery cell assembly, then productivity and assembly efficiency are improved, but electrode leads may overlap each other causing assembly quality deterioration and short circuit risks
Solution Approach 1:
The patent introduces a positioning structure comprising positioning blocks and positioning grooves as an intermediary mechanism between battery cells. The positioning blocks on one cell engage with positioning grooves on adjacent cells, serving as a mediator that ensures proper alignment and prevents electrode lead overlap during assembly, thereby resolving the contradiction between assembly efficiency and assembly quality
Solution Approach 2:
The battery cell assembly is segmented into modular units with standardized positioning features. Each battery cell is divided to include specific positioning blocks and positioning grooves at designated locations, allowing for systematic arrangement and preventing chaotic stacking that leads to electrode lead overlap, thus maintaining both high productivity and reliable assembly quality
2Ease of manufacture
If external material in the form of sheet or film including aluminum is used for battery cell packaging, then ease of manufacture and cost are improved, but spring back phenomenon occurs during handling causing deterioration in shape freezing properties
Solution Approach 1:
The patent applies preliminary shaping actions during the battery cell assembly process. The positioning structure is designed to maintain and freeze the correct spatial configuration of battery cells and their external materials before handling and transportation occur. By pre-establishing the correct shape and position through the positioning blocks and grooves, the spring back phenomenon is compensated for, ensuring the external material maintains its intended shape despite subsequent handling
Solution Approach 2:
The positioning structure applies preliminary counteracting forces to prevent the spring back phenomenon. By constraining the external material within the positioning structure during assembly, the system pre-compensates for the elastic recovery that would otherwise occur during handling, effectively counteracting the shape distortion caused by the spring back effect
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 approach enhances the quality and safety of battery cell assemblies by maintaining electrode lead alignment and preventing deformation, thus improving the overall assembly process and reducing the risk of short circuits.
Implementation Method 1
a first movement portion moving the plurality of terrace arrangement members in a plurality of directions and bringing the plurality of terrace arrangement members into contact with a terrace region of the external material
Data Source
AI summary
An arrangement apparatus for a battery cell assembly according to an embodiment of the present disclosure may include: to arrange the battery cell assembly including a plurality of battery cell in which an electrode assembly is accommodated inside an external material and an electrode lead is exposed to an outside of the external material, a plurality of terrace arrangement members spaced apart from each other and interposed between the plurality of battery cells; and a first movement portion moving the plurality of terrace arrangement members in a plurality of directions and bringing the plurality of terrace arrangement members into contact with a terrace region of the external material.