Bent-Plate Battery Cell Case for Easier Thin-Wall Forming
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Solution Overview
Problem
The difficulty in forming battery cell cases affects production costs and efficiency, particularly in creating thin-walled cases to improve energy density.
Innovation Solution
A case for battery cells is formed by bending a plate material, with the front and rear ends connected to create an accommodating space with openings at both ends, simplifying the forming process and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional forming methods are used to create battery cell cases, then the case can provide adequate structural strength, but the forming difficulty and production cost increase
Solution Approach 1:
The case is divided into multiple wall portions (first wall portion, second wall portion, third wall portion, fourth wall portion) that are formed and connected separately. This segmentation allows each wall portion to be formed independently with simpler processes, then assembled together to create the complete case structure, reducing overall forming difficulty while maintaining structural integrity
Solution Approach 2:
Multiple wall portions are connected through connection positions to form an integrated case structure. The connection positions are strategically designed to join the wall portions together, creating a unified structure that provides the necessary structural strength while allowing each component to be manufactured separately with reduced complexity
2Volume of moving object
If the case wall thickness is reduced to improve energy density, then the internal space increases, but the forming difficulty and structural reliability decrease
Solution Approach 1:
The thin-walled case is segmented into multiple wall portions that can be formed independently. This segmentation allows for better control of thin-walled forming processes, as each portion can be manufactured with optimized local parameters, reducing forming difficulty while maintaining the overall thin-walled structure for maximum internal space
Solution Approach 2:
Different wall portions have different local properties and functions. The connection positions are designed with specific local characteristics to ensure proper joining of thin-walled sections, while other areas maintain minimal thickness for maximum energy density. This local differentiation allows thin-walled construction without compromising structural reliability
3Device complexity
If the connection position and pressure relief mechanism are located on the same wall portion, then the structure is simpler, but the pressure relief mechanism reliability decreases
Solution Approach 1:
The case is segmented into multiple wall portions with the connection position and pressure relief mechanism strategically placed on different wall portions. This spatial segmentation isolates the pressure relief mechanism from the connection position, preventing interference and ensuring reliable pressure relief functionality while maintaining reasonable structural complexity through the modular wall portion design
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 reduces the difficulty of forming the case, improves the reliability of pressure relief mechanisms, and enhances the energy density of battery cells by allowing for a larger internal space.
Implementation Method 1
the case is formed by bending a plate material
Data Source
AI summary
A case, a battery cell, a battery, and a powered device are described. The case is molded by bending a plate, the head end and the tail end of the plate are connected to each other to define an accommodating space with openings at two opposite ends, and the accommodating space is configured for accommodating an electrode assembly of the battery cell. The case is molded by bending a plate, and the head end wall and the tail end wall of the plate are connected to each other, such that the case with openings at two opposite ends can be formed. The case is molded in a simple manner, such that the molding difficulty of the case is effectively reduced.