Battery Terminal Sealing Ring Compression for Capacity and Sealing
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Solution Overview
Problem
Existing battery designs face challenges in achieving optimal sealing performance while maintaining battery capacity, as the thickness of sealing rings either compromises sealing efficiency or occupies excessive internal space.
Innovation Solution
A battery design incorporating a sealing ring with adjustable compression, allowing for precise fitting between the conductive pillar and battery casing, ensuring effective sealing and facilitating the installation of lead-out pieces and spacer rings, with a compression ratio of 0.5≤d2/d1≤0.9 and contact area widths of 1.2 mm≤W≤2.5 mm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing ring thickness is increased to improve sealing performance, then sealing reliability is improved, but the internal space of the battery is reduced
Solution Approach 1:
The patent applies parameter changes by controlling the compression ratio of the sealing ring within a specific range (0.5≤d2/d1≤0.9). This optimization allows the sealing ring to achieve adequate sealing performance through controlled compression rather than simply increasing its initial thickness, thereby maintaining battery internal space while ensuring reliable sealing between the conductive pillar and battery casing.
2Quantity of substance
If the sealing ring thickness is decreased to increase battery capacity, then battery capacity is improved, but sealing performance is compromised
Solution Approach 1:
The patent resolves this contradiction by optimizing the compression ratio parameter of the sealing ring. Instead of using a thicker sealing ring to ensure sealing, the invention achieves reliable sealing with a thinner ring by controlling the compression within the range 0.5≤d2/d1≤0.9. This allows maximum battery capacity while maintaining adequate sealing performance.
Solution Approach 2:
The patent applies preliminary action by pre-compressing the sealing ring to a controlled degree during assembly. The compression ratio is predetermined within the range 0.5≤d2/d1≤0.9, which creates sufficient sealing force before the battery enters service. This preliminary compression ensures sealing reliability without requiring excessive initial thickness, thereby preserving battery capacity.
3Reliability
If the sealing ring is compressed too much to ensure sealing, then sealing performance is improved, but installation difficulty increases
Solution Approach 1:
The patent optimizes the compression ratio parameter to balance sealing performance and installation ease. By setting the compression ratio within the range 0.5≤d2/d1≤0.9, the sealing ring achieves adequate sealing without excessive compression. This moderate compression level makes the sealing ring flexible enough for easy installation while still providing reliable sealing between components.
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 design enhances sealing performance and battery capacity by allowing for a balanced compression of the sealing ring, ensuring efficient installation and reducing internal space occupation.
Implementation Method 1
the sealing ring is configured as an elastic piece; and an initial size of the sealing ring in its axial direction is d1, a size of the sealing ring after axial compression is d2
Data Source
AI summary
A battery, a battery pack, and a vehicle. The battery comprises: a battery casing; lead-out pieces and conductive pillars, the lead-out pieces being arranged in the battery casing, via holes allowing the conductive pillars to pass through being formed in the battery casing, the inner end of each conductive pillar being connected to a lead-out piece, and the outer end of each conductive pillar extending out of the battery casing; and sealing rings, the sealing rings being in sealed connection between the conductive pillars and the battery casing, the sealing rings being constructed to be elastic pieces, the initial size of each sealing ring in the axial direction thereof being d1, the size of each sealing ring compressed in the axial direction thereof being d2, and d1 and d2 meeting: 0.5≤d2/d1≤0.9.