Insulating Sheet Extension for Energy Storage Assembly
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Solution Overview
Problem
Conventional energy storage devices face manufacturing difficulties due to issues with the insulating sheet being displaced or caught between the case body and lid during assembly, leading to challenges in producing a reliable and efficient energy storage device.
Innovation Solution
The energy storage device incorporates an electrode assembly with a connecting part projecting from its main body and an insulating sheet with a sheet extension part that is fixed to the electrode assembly, preventing the insulating sheet from being sandwiched or caught during assembly, and enhancing insulation and joining reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulating sheet is used to cover the side surface of the electrode assembly, then insulation is provided, but the insulating sheet may be displaced or caught between the case body and lid during assembly, making manufacturing difficult
Solution Approach 1:
The insulating sheet is divided into two functional parts: a sheet side surface part covering the side surface of the electrode assembly main body, and a sheet extension part that extends toward the connecting part. This segmentation allows each part to perform its specific function independently, preventing displacement while maintaining insulation reliability.
Solution Approach 2:
The sheet extension part is positioned in advance to extend toward the connecting part before assembly is completed. This preliminary positioning ensures that the insulating sheet is already in its correct final position, preventing it from being caught between the case body and lid during the assembly process.
2Reliability
If the insulating sheet extends toward the connecting part, then insulation coverage is improved, but the insulating sheet may be caught between the case body and lid, reducing manufacturing ease
Solution Approach 1:
The insulating sheet has different structural qualities in different regions: the sheet side surface part provides general insulation coverage, while the sheet extension part specifically targets the connecting part area. This local differentiation ensures insulation coverage is provided exactly where needed without causing manufacturing issues.
3Ease of manufacture
If the insulating sheet is fixed to the electrode assembly, then manufacturing difficulty is reduced, but additional fixing steps are required, potentially increasing complexity
Solution Approach 1:
The sheet extension part is integrated with the sheet side surface part to form a single insulating sheet structure. This merging eliminates the need for separate fixing components or additional assembly steps, as the extended part naturally positions itself during assembly and can be secured through existing bonding processes.
Data Source
AI summary
An energy storage device includes an electrode assembly, a positive-electrode current collector, and an insulating sheet. The electrode assembly has a main body part and a connecting part projecting from the main body part and connected to the positive-electrode current collector. The insulating sheet has a sheet side surface part facing a side surface of the main body part, and a sheet extension part extending from the sheet side surface part. The sheet extension part is fixed to the electrode assembly.