Battery Cell Tab Connection Within the Sealed Edge Area
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Solution Overview
Problem
Current battery cell designs occupy excessive space due to the arrangement of connection portions outside sealed areas, leading to lower energy density and increased risks of short circuits and external contamination.
Innovation Solution
The battery cell incorporates a housing with a sealed area at the edge, where the connection portion between the electrode lead-out and tab is fully located within this area, utilizing space more efficiently and employing an adhesion member to separate the connection portion from the metal housing, preventing short circuits and enhancing sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the connection portion is arranged outside the sealed area, then the assembly process is simpler, but the space utilization is reduced and short circuit risk increases
Solution Approach 1:
The patent merges the connection portion with the sealed area by positioning the connection portion within the sealed area boundaries. This integration allows the connection structure to utilize the sealed space rather than occupying additional external space, thereby improving space utilization while maintaining manufacturing simplicity through the unified design approach.
Solution Approach 2:
The patent repositions the connection portion from an external arrangement to an internal arrangement within the sealed area, effectively changing its spatial dimensionality. This dimensional reconfiguration allows the connection portion to be embedded within the existing sealed structure, optimizing space utilization without compromising assembly simplicity.
2Device complexity
If the connection portion is arranged outside the sealed area, then the sealing structure is simpler, but the risk of short circuit and contamination increases
Solution Approach 1:
The patent combines the connection portion placement with the sealed area design, so that the connection portion is positioned within the sealed area. This merging ensures that the connection structure is inherently protected by the sealing, reducing short circuit risk and contamination without requiring additional separate sealing components or complex sealing structures.
Solution Approach 2:
The sealed area acts as an intermediary protective barrier between the connection portion and the external environment. By positioning the connection portion within the sealed area, the sealing structure mediates the protection, isolating the connection from potential contaminants and short circuit risks while maintaining structural simplicity.
3Volume of moving object
If the connection portion is fully located within the sealed area, then space utilization is maximized and safety is improved, but the sealing structure becomes more complex
Solution Approach 1:
The patent integrates the connection portion placement within the sealed area in a way that maximizes space utilization. The connection portion is positioned to fully utilize the sealed space, and the sealing structure is designed to accommodate this arrangement naturally, achieving both space optimization and safety improvement without excessive complexity increase.
4Reliability
If the adhesion member fully covers the connection portion, then the protection against short circuit is improved, but the material consumption increases
Solution Approach 1:
The patent applies the adhesion member with full coverage over the connection portion to ensure comprehensive protection against short circuits. The adhesion member is positioned to completely cover the connection area, providing uniform protective properties across the entire connection surface, which maximizes short circuit prevention while accepting the associated material consumption.
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 configuration increases energy density by optimizing space utilization within the battery cell, improves safety by reducing short circuit risks, and enhances sealing to protect against external contaminants, thereby ensuring better electrochemical performance.
Implementation Method 1
the adhesion member is configured to adhere the connection portion to the sealed area
Data Source
AI summary
A battery cell includes a housing, an electrode assembly, and an electrode lead-out portion. The housing is provided with a sealed area at an edge. The electrode assembly is accommodated in the housing, and the electrode assembly includes a main body portion and a tab connected to the main body portion. At least a portion of the electrode lead-out portion is electrically connected to the tab to form a connection portion, and at least a portion of the connection portion is located in the sealed area.