Integral Battery Can Sealing Body for Insulation Consistency
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Solution Overview
Problem
The conventional sealing method for battery cans using a gasket and sealing plate combination is prone to variations in assembly tolerance, leading to inconsistent insulation and aesthetic issues due to distorted gasket shapes and uneven insulation widths, which can compromise electrical insulation and structural integrity.
Innovation Solution
Integrally molding a sealing plate and gasket together to form a sealing body, allowing for consistent and wider insulation distances and reduced assembly tolerance, with features like projecting portions and recessed areas to enhance adhesion and protect against cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gasket and sealing plate are used in combination as a sealing body, then the sealing function is achieved, but the assembling tolerance varies during the sealing process leading to inconsistent insulation and distorted gasket shapes
Solution Approach 1:
The gasket and sealing plate are merged into a single integrally molded sealing body. This eliminates the assembly interface between separate components, thereby eliminating assembling tolerance variations and ensuring consistent insulation width and gasket shape throughout the sealing process.
2Reliability
If the gasket is pressed to bring it into close contact with the sealing plate, then sealing contact is achieved, but the position of the gasket contacting the periphery varies due to assembling tolerance
Solution Approach 1:
By integrally molding the gasket and sealing plate, the contact position between gasket and sealing plate is fixed and predetermined by the mold design. This eliminates position variation that occurs during assembly of separate components, ensuring uniform contact throughout the sealing perimeter.
3Adaptability or versatility
If separate gasket and sealing plate components are used, then component flexibility is maintained, but the shape, size, and design options are constrained by assembling tolerance considerations
Solution Approach 1:
The integral molding approach allows the sealing body to be designed as a unified component with optimized shape, size, and features without being constrained by assembly tolerance requirements. The single-component structure enables greater design freedom while ensuring consistent manufacturing quality.
4Reliability
If the gasket shape is distorted due to assembly variation, then insulation width becomes uneven, but electrical insulation reliability is compromised
Solution Approach 1:
The integrally molded sealing body ensures the gasket maintains its intended shape without distortion during assembly. The unified structure eliminates variability in insulation width, ensuring consistent electrical insulation performance around the entire sealing perimeter.
5Reliability
If separate gasket and sealing plate components are assembled, then the sealing body consists of multiple parts, but the production process becomes more complex
Solution Approach 1:
The gasket and sealing plate are combined into a single integrally molded component, reducing the sealing body from multiple parts to one unified structure. This simplifies the overall production process by eliminating assembly steps while maintaining all necessary sealing functions.
6Reliability
If multiple components are used for sealing, then functional requirements are met, but the number of parts increases leading to more complex assembly
Solution Approach 1:
The integral molding of gasket and sealing plate into a single component reduces the number of parts that need to be assembled. This improves production efficiency by eliminating assembly operations while maintaining the sealing performance required by the battery design.
Data Source
AI summary
A battery including: a battery can including a cylindrical portion, a bottom wall closing one end of the cylindrical portion, and an open rim continuing to the other end of the cylindrical portion; an electrode body housed in the cylindrical portion; and a sealing body fixed to the open rim so as to seal an opening defined by the open rim. The sealing body includes a sealing plate, and a gasket disposed at a peripheral portion of the sealing plate. The gasket has an inner ring portion disposed on the peripheral portion on a side facing the electrode body, an outer ring portion disposed on the peripheral portion on a side opposite to the side facing the electrode body, and a side wall portion covering an end surface of the peripheral portion. The sealing plate and the gasket are integrally molded to be in close contact with each other.