Electrode Rolling Feedback Control for Thickness Consistency
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Solution Overview
Problem
Conventional rolling devices for lithium-ion battery electrodes control thickness using constant pressure or gap, leading to poor thickness consistency in the produced electrodes.
Innovation Solution
An electrode thickness control method that involves obtaining initial and target thicknesses, monitoring thickness change data and rolling speed, and adjusting rolling pressure or temperature in real-time to achieve consistent electrode thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If constant rolling pressure or constant rolling gap is used to control electrode thickness, then the rolling process is simple to operate, but the thickness consistency of the produced electrode deteriorates
Solution Approach 1:
The patent transforms the static constant pressure/gap control into a dynamic adaptive control system that continuously adjusts rolling parameters based on real-time thickness feedback. The control system dynamically modifies rolling pressure and gap settings during the rolling process to compensate for variations in electrode material properties, thereby achieving consistent thickness while maintaining operational simplicity through automation.
Solution Approach 2:
The patent implements a closed-loop feedback control system where thickness sensors continuously measure the electrode thickness during rolling, and the measured values are fed back to the control system. The control system processes this feedback information and adjusts the rolling pressure and gap in real-time to maintain the desired thickness consistency, resolving the contradiction between simple operation and precise control.
2Manufacturing precision
If real-time adjustment of rolling pressure and temperature is implemented to improve thickness consistency, then the electrode thickness uniformity is improved, but the control system complexity increases
Solution Approach 1:
The patent enables the rolling system to self-adjust by incorporating automated control algorithms that process thickness feedback and automatically modify rolling parameters without requiring complex manual intervention. The system serves itself by using its own measurement data to make real-time corrections, reducing the need for complex external control mechanisms while achieving improved thickness uniformity.
Solution Approach 2:
The patent achieves improved thickness consistency by dynamically changing key process parameters (rolling pressure, rolling gap, and temperature) based on real-time thickness measurements. The control system monitors thickness variations and adjusts these parameters accordingly, transforming a static rolling process into a dynamic one that adapts to material variations, thereby improving precision without requiring overly complex system architecture.
Data Source
AI summary
An electrode thickness control method and a control system is provided. The control method includes: obtaining an initial thickness and a target thickness of a to-be-rolled electrode; controlling, according to the initial thickness and the target thickness, a target device to roll the to-be-rolled electrode; obtaining first thickness change data of the to-be-rolled electrode, second thickness change data of a rolled electrode formed through rolling, and current rolling speed data of the target device; and adjusting, according to the first thickness change data, the second thickness change data, or the current rolling speed data, a current rolling pressure or a current rolling temperature of the target device, to cause a thickness of the rolled electrode to reach the target thickness.