Reinforced Electrode Plate Bending for Thin Battery Cells
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Solution Overview
Problem
Thin electrode plates in battery cells are prone to misalignment during bending, affecting processing yield and use performance, potentially leading to safety incidents.
Innovation Solution
Incorporating a reinforcing structure, such as a protrusion or indentation, near the bending segment of the electrode plate to enhance the strength of the laminated segment, allowing precise bending and reducing misalignment and wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the electrode plate is designed to be thin to increase energy density, then the energy density is improved, but the electrode plate becomes prone to misalignment during bending
Solution Approach 1:
The patent applies local quality by providing a reinforcing structure only in the region of the laminated segment close to the bending segment, rather than making the entire electrode plate thick. This localized reinforcement enhances bending alignment precision while maintaining thin overall thickness for high energy density.
2Manufacturing precision
If a reinforcing structure is added to prevent misalignment, then the manufacturing precision is improved, but the structure complexity increases
Solution Approach 1:
The reinforcing structure is provided only in the specific region of the laminated segment close to the bending segment, not throughout the entire electrode plate. This localized approach improves bending alignment precision while minimizing the increase in overall structure complexity.
3Manufacturing precision
If the protrusion height is increased to enhance reinforcement strength, then the manufacturing precision is improved, but the space utilization rate decreases
Solution Approach 1:
The patent optimizes the protrusion height parameter within a specific range (0.3-50 times the laminated segment thickness) to achieve the balance between reinforcement strength and space utilization. This parameter optimization ensures sufficient bending alignment precision while minimizing the impact on space utilization rate and energy density.
Data Source
AI summary
An electrode plate, an electrode assembly, a battery cell, a battery, an electric device, and a method for manufacturing electrode assembly are provided. The electrode plate includes: a laminated segment and a bending segment, the bending segment is connected to the laminated segment, and the bending segment is configured for bending, where a region of the laminated segment close to the bending segment is provided with a reinforcing structure.