Composite Battery Shell Structure for Deep-Draw Forming Limits
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Solution Overview
Problem
The existing battery shell materials, typically made of stainless steel, face challenges in tensile performance and punching depth, leading to increased costs and processing difficulties, especially with complex shapes.
Innovation Solution
A battery shell design featuring a cylindrical body formed by bending a strip plate with cover plates, incorporating grooves and a pole assembly, which reduces processing complexity and allows for more deformation, thereby improving space utilization and manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If stainless steel is used as battery shell material to reduce raw material costs, then material cost is reduced, but tensile performance deteriorates and punching depth is limited
Solution Approach 1:
The battery shell is divided into two functional parts: the body made of stainless steel for cost-effectiveness and basic structural support, and the cover plate made of aluminum alloy for high tensile performance and sealing. This segmentation allows each material to be optimized for its specific function, resolving the contradiction between cost and strength.
Solution Approach 2:
The patent employs a composite structure combining stainless steel body with aluminum alloy cover plate. This composite material approach leverages the cost advantages of stainless steel while incorporating the superior tensile properties of aluminum alloy, thereby achieving both cost reduction and maintained strength.
2Strength
If stainless steel is used for battery shell to maintain structural integrity, then strength is maintained, but processing complexity increases and assembly difficulty rises
Solution Approach 1:
By segmenting the battery shell into body and cover plate components, the patent simplifies processing requirements. The stainless steel body can be formed with standard deep-drawing processes while the aluminum alloy cover plate requires simpler forming, reducing overall processing complexity while maintaining structural integrity through the combined structure.
3Strength
If high tensile performance material is used for battery shell to improve tensile performance, then tensile performance is improved, but manufacturing costs increase greatly
Solution Approach 1:
The patent applies local quality by using aluminum alloy specifically for the cover plate where high tensile performance is critical for sealing and structural integrity, while the body can use more cost-effective stainless steel. This localized application of high-performance material optimizes the balance between strength and cost.
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 design enhances space utilization, reduces manufacturing costs, and facilitates scalable production by simplifying the assembly and deformation of the battery shell, while maintaining structural integrity and sealing performance.
Implementation Method 1
the body is formed by bending a plate with a strip shape at least once
Data Source
AI summary
A battery shell and a battery are provided. The battery shell includes a body and two cover plates, wherein the body is a cylinder structure with two openings respectively at two ends thereof, the body is formed by bending a strip-shaped plate at least once, two ends of the plate are connected to each other, a width of the plate is B1, a width of the cover plate is B2, B1 is less than B2, the two cover plates respectively block the two openings of the body, the body is provided with a mounting side surface, and a pole assembly is arranged on the mounting side surface.