Laser-Patterned Electrode Surface for Uniform Slurry Loading
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Solution Overview
Problem
The sliding phenomenon during the coating process of electrode active material slurry on current collectors leads to the formation of sliding parts, resulting in uneven loading and potential physical isolation between positive and negative electrodes, which degrades battery performance and capacity.
Innovation Solution
The electrode design includes a cutting surface with concave and convex shapes formed by laser ablation, removing the sliding parts and maintaining stable electrode quality through a concave and convex pattern on the electrode layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wet coating is performed on the current collector to form an electrode layer, then the electrode can be manufactured, but sliding parts are formed at both ends due to slurry spreading, resulting in uneven loading and reduced battery capacity
Solution Approach 1:
The patent applies preliminary action by forming a protrusion part on the current collector before coating the active material slurry. This protrusion structure pre-defines the electrode layer boundaries and prevents slurry from spreading to the edges during the wet coating process, thereby eliminating sliding parts and ensuring uniform loading distribution before the actual coating occurs.
2Productivity
If the sliding part is present in the electrode, then the electrode can be manufactured, but the amount of loading at both ends is lower than the central part, leading to reduced battery capacity
Solution Approach 1:
The protrusion part is formed in advance on the current collector to define the active material deposition area. This preliminary structural preparation ensures that during slurry coating, the active material is confined to the central region with uniform thickness, preventing edge spreading and ensuring consistent loading quantity across the electrode surface.
3Device complexity
If the sliding part is present in the electrode, then the electrode structure is formed, but physical isolation between positive and negative electrodes may occur, degrading battery performance
Solution Approach 1:
The protrusion part is formed beforehand on the current collector to establish proper electrode geometry and spacing. This preliminary structural configuration ensures that during assembly, the positive and negative electrodes maintain appropriate separation and contact alignment, preventing physical isolation and ensuring stable electrical connectivity throughout battery operation.
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 design stabilizes electrode quality, improves charging and discharging speed, and extends the lifespan of the battery by preventing uneven loading and maintaining the N/P balance between electrodes.
Implementation Method 1
a cutting surface having a concave and convex shape
Data Source
AI summary
Disclosed is an electrode. The electrode may include a current collector and an electrode layer disposed on at least one surface of the current collector. The electrode layer may include a cutting surface having a concave and convex shape.