Intermittent coating device
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Solution Overview
Problem
The increasing demand for secondary battery production, particularly lithium-ion batteries, requires a method to reduce manufacturing time of electrode plates while maintaining application accuracy, as high-speed intermittent coating with conventional devices degrades the quality of electrode plates due to responsiveness limitations of single intermittent valves.
Innovation Solution
An intermittent coating device with two intermittent valves that have different switching timings between supply and non-supply states, allowing for independent and staggered control of coating material discharge, enabling high-speed coating without compromising accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrode slurry is intermittently applied on metallic foil at high speed to reduce manufacturing time, then productivity is improved, but application accuracy is degraded due to responsiveness limitation of the intermittent valve
Solution Approach 1:
The single intermittent valve is segmented into two separate intermittent valves (first intermittent valve 22A and second intermittent valve 22B). Each valve controls a separate supply line (first die supply pipe conduit 14A and second die supply pipe conduit 14B) to the die 2. This segmentation allows independent control of coating material supply timing, enabling high-speed operation while maintaining application accuracy through staggered valve switching.
2Device complexity
If a single intermittent valve is used to control coating material supply, then device complexity is reduced, but responsiveness is limited preventing high-speed accurate coating
Solution Approach 1:
The valve system is segmented into two independent intermittent valves with separate control timing. The first intermittent valve 22A and second intermittent valve 22B can switch at different times, creating a staggered supply pattern that increases overall system responsiveness and enables higher conveying speeds while maintaining coating accuracy.
Solution Approach 2:
The system introduces dynamic timing control where the switching timings of the two intermittent valves are different. This dynamic adjustment of valve operation timing allows the system to adapt to high-speed conveying requirements while maintaining precise coating application, overcoming the static limitation of a single valve system.
Data Source
AI summary
An intermittent coating device includes a die used to apply a coating material onto a material to be coated, and a first intermittent valve and a second intermittent valve capable of switching between a first state in which the coating material is supplied to the die and a second state in which the supply of the coating material is stopped. The first intermittent valve and the second intermittent valve have different timings of switching between the first state and the second state.