Coating Die Lip Temperature Control for Uniform Slurry Coating
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Solution Overview
Problem
Existing coating dies have low adjustment accuracy and long response times for adjusting the distance between the lip portion and the substrate, leading to inconsistent coating thickness and weight, which is inadequate for meeting the requirements of battery technology development.
Innovation Solution
A coating die with a lip adjustment assembly that controls the temperature of the lip portion to deform and adjust the gap between the lip portion and the substrate, using semiconductor temperature control elements and a control unit to automate and accurately adjust the deformation based on real-time coating information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of the lip portion deformation is used, then the device complexity is low, but the manufacturing precision and response time are insufficient
Solution Approach 1:
The patent replaces the manual mechanical adjustment system with a temperature control system that uses thermal expansion/contraction of the lip portion to achieve precise gap adjustment. The temperature control assembly includes heating and cooling units that can rapidly adjust the lip portion temperature, providing automated control with high precision and fast response time, thereby resolving the contradiction between manufacturing precision and device complexity.
Solution Approach 2:
The patent changes the physical parameter of the lip portion from mechanical position to temperature-controlled dimensional change. By controlling the temperature of the lip portion, the patent achieves precise control over the gap between the lip portion and substrate through thermal expansion and contraction, enabling accurate coating thickness control without complex mechanical adjustment mechanisms.
2Manufacturing precision
If the gap between lip portion and substrate is not precisely controlled, then the device complexity is low, but the coating weight and thickness uniformity deteriorates
Solution Approach 1:
The patent incorporates a feedback control system where the temperature control assembly continuously monitors and adjusts the lip portion temperature based on the required gap dimensions. This automated feedback mechanism ensures precise control of the gap between the lip portion and substrate, maintaining consistent coating weight and thickness while reducing manual intervention.
Solution Approach 2:
The temperature control assembly enables the lip portion to self-adjust its dimensions through thermal expansion and contraction in response to temperature changes. This self-service mechanism automatically maintains the optimal gap for coating consistency without requiring external mechanical adjustment, improving both precision and automation.
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 solution improves the consistency and accuracy of the coating process by allowing for precise adjustment of the gap between the lip portion and the substrate, enhancing the thickness and weight uniformity of the coating, thus addressing the limitations of existing coating dies.
Implementation Method 1
the lip adjustment assembly is used for adjusting a temperature of the lip portion to control a deformation of the lip portion. When the temperature of the lip portion changes, the lip portion may expand or contract
Data Source
AI summary
The present application provides a coating die, a coating device and a coating method. The coating die includes a first die and a second die, the first die is connected to the second die and enclosed to form a slot to output slurry; the first die includes a die body, a lip portion and a lip adjustment assembly; the lip portion is connected to the die body and is located at a discharge end of the slot; the lip adjustment assembly is used for adjusting a temperature of the lip portion to control a deformation of the lip portion. The solution of the present application can improve the consistency of coating.