Double-Seam Battery Can Structure for Insulation and Pressure Resistance
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Solution Overview
Problem
Existing double seaming structures for metal containers, such as batteries, face challenges in maintaining electrical insulation and pressure resistance, often compromising on either insulation or sealing performance due to the thickness and rigidity of the metal members.
Innovation Solution
A double seaming structure is developed with first and second metal members featuring turned-back portions formed by hemming bending, which are coated with insulating layers and bonded using an anaerobic adhesive, ensuring electrical insulation and enhanced pressure resistance without compromising sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal members are made thicker to improve pressure resistance, then strength increases, but weight increases and manufacturing cost increases
Solution Approach 1:
The patent applies composite materials by combining metal members with insulating layers and anaerobic adhesive to create a multi-layer composite structure. This composite construction provides both mechanical strength for pressure resistance and electrical insulation, eliminating the need to increase metal thickness solely for strength while also providing weight reduction through optimized material selection and distribution.
Solution Approach 2:
The patent applies local quality by providing insulating layers and turned-back portions at specific locations where electrical insulation is needed, rather than making the entire metal member thicker. The insulating layers are applied locally at contact surfaces and the turned-back portions are formed only at the ends of metal members, providing targeted electrical insulation without unnecessary weight increase throughout the entire structure.
2Strength
If metal members are made thicker to improve pressure resistance, then strength increases, but manufacturing cost increases
Solution Approach 1:
The patent uses composite materials construction where insulating layers and adhesive are applied to metal members to achieve both strength and insulation functions. This approach is more cost-effective than using thicker metal throughout, as it allows optimization of each layer's thickness and material properties for its specific function, reducing overall material cost and manufacturing complexity.
Solution Approach 2:
The patent applies local quality by providing insulating layers and turned-back portions at specific locations where electrical insulation is needed, rather than making the entire metal member thicker. The insulating layers are applied locally at contact surfaces and the turned-back portions are formed only at the ends of metal members, providing targeted electrical insulation without unnecessary weight increase throughout the entire structure.
3Weight of moving object
If metal members are made thinner to reduce weight and cost, then weight decreases, but pressure resistance decreases
Solution Approach 1:
The patent applies composite materials by combining metal members with insulating layers and anaerobic adhesive to create a multi-layer composite structure. This composite construction provides both mechanical strength for pressure resistance and electrical insulation, eliminating the need to increase metal thickness solely for strength while also providing weight reduction through optimized material selection and distribution.
Solution Approach 2:
The patent applies local quality by providing insulating layers and turned-back portions at specific locations where electrical insulation is needed, rather than making the metal member thicker throughout. The insulating layers are applied locally at contact surfaces and the turned-back portions are formed only at the ends of metal members, providing targeted electrical insulation without unnecessary weight increase.
4Weight of moving object
If metal members are made thinner to reduce weight and cost, then weight decreases, but electrical insulation becomes insufficient
Solution Approach 1:
The patent applies the intermediary principle by introducing insulating layers as a mediator between the first and second metal members. These insulating layers are applied to the surfaces of the metal members at contact regions and provide reliable electrical insulation without requiring the metal members themselves to be thicker. The anaerobic adhesive also serves as an intermediary that bonds the metal members while maintaining electrical insulation properties.
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 structure maintains excellent electrical insulation and high pressure resistance while allowing for thinner metal members, improving the overall performance and cost-effectiveness of the double seaming process.
Implementation Method 1
bonded using an anaerobic adhesive
Implementation Method 2
coated with insulating layers
Data Source
AI summary
A double seaming structure 100 includes a first metal member 111 having a first turned-back portion 113 at a first end portion 112 and a second metal member 121. A first region 115 including the first end portion 112 of the first metal member 111 and a second region 125 including a second end portion 122 of the second metal member 121 are in close contact with each other and sealed.