Heated Guide Rollers for Uniform Double-Sided Electrode Coating
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Solution Overview
Problem
Existing electrode manufacturing processes struggle to achieve uniform coating of electrode slurry on both surfaces of an electrode current collector, leading to non-uniformity and inefficiencies in secondary battery production.
Innovation Solution
A system and method involving a first coating unit, primary drying furnace, heat pipe guide rollers, second coating unit, and secondary drying furnace, along with precise temperature control and uniformity maintenance using constant-temperature media, to ensure even coating on both surfaces of the electrode current collector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large amount of electrode slurry is coated on the current collector to increase capacity, then the loading amount increases, but coating uniformity becomes more difficult to maintain
Solution Approach 1:
The patent controls and adjusts process parameters including the temperature of the current collector, the viscosity of the electrode slurry, and the coating speed to maintain optimal coating conditions. By precisely controlling these parameters, the system achieves uniform coating even when applying large amounts of slurry for high-capacity batteries.
2Manufacturing precision
If the current collector is not heated uniformly before coating, then the coating process is simpler, but temperature deviation in the width direction causes non-uniform coating
Solution Approach 1:
The patent employs heating rollers that apply heat locally to specific regions of the current collector width. This ensures uniform temperature distribution across the width direction where coating uniformity is critical, while avoiding unnecessary heating in other areas, thus balancing coating quality with reasonable system complexity.
3Manufacturing precision
If the current collector temperature varies during coating, then the process is faster, but the interval between discharge unit and coating roller cannot be maintained constant
Solution Approach 1:
The patent heats the current collector to a predetermined temperature before the coating process begins. This preliminary heating ensures that the current collector maintains a stable temperature during coating, allowing the interval between the discharge unit and coating roller to remain constant throughout the process, thereby ensuring uniform coating quality.
4Manufacturing precision
If conventional single-surface coating methods are used, then the process is simpler, but both surfaces of the current collector cannot be coated uniformly
Solution Approach 1:
The patent divides the coating process into separate stages for each surface of the current collector. By treating each surface independently with dedicated coating units and heating zones, the system achieves uniform coating on both surfaces while managing complexity through modular process segmentation.
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 solution enables uniform coating of electrode slurry on both surfaces, maintaining temperature uniformity and reducing temperature deviations, thereby enhancing the efficiency and quality of electrode manufacturing.
Implementation Method 1
n heat pipe guide rollers which reduces a temperature deviation in a width direction of the electrode current collector having passed through the primary drying furnace by heating the electrode current collector
Data Source
AI summary
The present technology relates to an electrode manufacturing system, and an electrode manufacturing method using the same. According to the present technology, it is possible to uniformly second-coating an electrode slurry as an electrode current collector, which has gone through electrode slurry first coating and drying processes, passes through a heat pipe guide roller.