Battery Case Sealing Block with Flatness and Heat Uniformity
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Solution Overview
Problem
Secondary battery sealing devices face issues with thickness deviation due to non-flat sealing tools and inadequate temperature uniformity, leading to inconsistent sealing quality.
Innovation Solution
A sealing device with a flatness adjusting part and a heater part to ensure the sealing block's flatness and temperature uniformity, comprising a sealing block, adjusting screws, support screws, and heaters to precisely seal the battery case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a sealing tool is used without flatness adjustment, then the sealing process is simple, but thickness deviation of the sealing portion occurs
Solution Approach 1:
The sealing block is designed with adjustable flatness through support screws that can be tuned to change the pressing surface geometry. This dynamic adjustment capability allows the sealing device to adapt to different sealing requirements while maintaining uniform thickness, resolving the contradiction between simplicity and precision.
Solution Approach 2:
The flatness of the sealing block's pressing surface is adjusted by changing the position of support screws. By modifying geometric parameters of the sealing block through screw adjustment, the device achieves uniform sealing thickness without requiring a completely redesigned complex structure.
2Temperature
If a heater structure is provided for heating the sealing tool, then temperature uniformity is improved, but device complexity increases
Solution Approach 1:
The heater is integrated directly into the sealing block structure, merging the heating function with the sealing component. This combination approach provides temperature uniformity across the sealing surface without adding separate complex heating systems, thus improving temperature control while minimizing device complexity.
Solution Approach 2:
The sealing block serves multiple functions: it provides the pressing surface for sealing, contains the integrated heater for temperature control, and maintains structural support. This multi-functionality reduces the need for separate components, achieving temperature uniformity without proportionally increasing device complexity.
3Reliability
If the sealing block is pressed without temperature control, then the sealing process is simple, but sealing quality is insufficient
Solution Approach 1:
The heater induces thermal softening or melting of the sealing material, utilizing phase transition or viscoelastic behavior to achieve reliable sealing. This thermal approach ensures proper sealing quality by controlling material behavior during the sealing process, while the integration into the sealing block keeps the overall device complexity manageable.
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
The solution effectively prevents thickness deviation and ensures uniform temperature, enhancing the sealing quality and consistency of secondary batteries.
Implementation Method 1
a heater part configured to transfer heat to the sealing block to thermally fuse the sealing portion of the battery case
Implementation Method 2
a sealing block configured to press a sealing portion of the battery case
Data Source
AI summary
The present invention relates to a sealing device for a secondary battery. The sealing device is configured to seal a battery case accommodating an electrode assembly therein to manufacture the secondary battery, the sealing device including a sealing block configured to press a sealing portion of the battery case, a flatness adjusting part configured to adjust a flatness of a pressing surface of the sealing block, and a heater part configured to transfer heat to the sealing block to thermally fuse the sealing portion of the battery case when the sealing portion is pressed by the sealing block.