Spliced Battery Cell Casing for Thin-Wall Precision Forming
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Solution Overview
Problem
The molding difficulty of battery cell cases affects production costs and dimensional precision, particularly when thinner cases are required for higher energy density.
Innovation Solution
The battery cell case is formed by splicing at least two independently formed side plates, which are welded together to enclose a tubular structure, with specific thickness and shape definitions to ensure strength and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the case is integrally formed by stamping, then the manufacturing process is simple, but the thickness consistency and dimensional precision are poor
Solution Approach 1:
The case is divided into multiple side plates that are formed independently and then spliced together. Each side plate can be formed separately with better thickness control, avoiding the thickness inconsistency problem of integral stamping while maintaining manufacturing simplicity through modular assembly
2Quantity of substance
If the case thickness is reduced to improve energy density, then the energy density increases, but the molding difficulty increases and dimensional precision deteriorates
Solution Approach 1:
By segmenting the case into multiple thin side plates that are spliced together, each plate can be made thinner to improve energy density while the modular structure maintains dimensional precision through controlled joining of individually formed components
Solution Approach 2:
The use of thin side plates (0.1-0.3mm thickness) as flexible yet structurally sufficient components allows for reduced material thickness to improve energy density while maintaining adequate structural integrity through the spliced configuration
3Manufacturing precision
If the case is formed by splicing side plates, then the thickness consistency and dimensional precision improve, but the manufacturing process complexity increases
Solution Approach 1:
The case is segmented into multiple side plates that can be formed using standard stamping or forming processes, then spliced together using welding or other joining methods. This segmentation allows each component to be manufactured with high precision using conventional techniques, improving overall dimensional precision while keeping the manufacturing process manageable through modular assembly
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 method simplifies the manufacturing process, improves thickness consistency, and enhances dimensional precision while maintaining structural strength and energy density.
Implementation Method 1
two adjacent side plates are welded in the circumferential direction of the case
Data Source
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AI summary
The present application provides a battery cell case and a manufacturing method therefor, a battery cell, a battery, and an electric apparatus. The case comprises at least two side plates, wherein each side plate is independently formed, and the at least two side plates are sequentially arranged and connected in the circumferential direction of the case so as to enclose a hollow tubular structure.