Electrically Heated Rollers for Uniform Film Thickness Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing roller systems face challenges in maintaining precise temperature control, leading to thickness variations in products like films and electrochemical cell components due to thermal expansion, which can result in defective cell production.
Innovation Solution
Integration of electrical heating elements within the roller, along with temperature sensors and a control circuit, allows for precise temperature regulation across zones, ensuring uniform thickness and properties of the film, using resistive or inductive heating elements and active cooling systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional fluid circulation systems are used for temperature control, then heating can be achieved, but the system complexity increases and temperature uniformity deteriorates
Solution Approach 1:
The patent replaces the mechanical fluid circulation system with an electrical heating element system. Instead of using pumps, pipes, and fluid circulation mechanisms, the invention uses electrical heating elements that can be directly integrated into the roller structure, eliminating the complexity of fluid passages while achieving precise temperature control
Solution Approach 2:
The heating elements are merged directly into the roller structure itself. The electrical heating elements are integrated within the roller body, allowing the roller to generate and distribute heat internally without requiring external fluid circulation systems, thereby simplifying the overall device complexity
2Temperature
If fluid circulation is used for temperature control, then heating can be provided, but temperature uniformity across the roller deteriorates
Solution Approach 1:
The roller is divided into multiple heating zones, each with its own heating element or independently controllable heating section. This segmentation allows for precise control of temperature in different regions of the roller, ensuring uniform temperature distribution across the entire roller surface by independently adjusting each zone
Solution Approach 2:
The system incorporates temperature sensors that continuously monitor the temperature distribution across the roller and provide feedback to the control system. This feedback mechanism allows for real-time adjustments to the heating elements, maintaining uniform temperature across the roller by compensating for any local temperature variations
3Productivity
If roller size is increased for production capacity, then productivity improves, but thermal expansion effects worsen
Solution Approach 1:
Temperature sensors monitor the roller temperature and provide feedback to the control system, which adjusts the heating elements to maintain the roller at a precise setpoint temperature. This feedback control compensates for thermal expansion effects, allowing large rollers to maintain dimensional stability and produce films with consistent thickness
Solution Approach 2:
The system actively controls the temperature parameter of the roller, maintaining it within a narrow range despite variations in ambient conditions or load. By precisely controlling the temperature parameter, the thermal expansion of the roller is minimized, allowing large rollers to maintain manufacturing precision
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 maintains a consistent temperature and accurate film thickness, reducing thermal expansion issues and ensuring the quality of electrochemical cell components by maintaining precise temperature control and uniformity across the roller.
Implementation Method 1
the one or more electrical heating elements are resistive heating elements
Implementation Method 2
the one or more electrical heating elements are inductive heating elements
Implementation Method 3
thermal expansion associated with roller materials causes changes in the roller size
Data Source
AI summary
Methods and systems for electrically heating and cooling rollers is described. A system may include one or more rollers comprising one or more electrical heating elements and one or more air channels. The one or more electrical heating elements may integrated to a power source and control circuit through an electrical contact on at least one end of the roller. The control circuit may additionally receive input from one or more temperature sensors.