Cold Press Pressure Control for Pole Piece Density Accuracy
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Solution Overview
Problem
Current cold press pressure control methods for battery pole piece rolling fail to match actual rolling speed, leading to significant errors in compaction density and poor energy density of batteries.
Innovation Solution
Adaptive pressure control method that adjusts cold press output pressure based on real-time thickness and rolling speed, utilizing association relationships and regression models to ensure pressure matches actual demands, minimizing errors in the rolled pole piece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If preset rolling speed and pressure are used for cold press, then the control method is simple, but the pressure does not match the actual rolling speed, resulting in large error of the rolled pole piece
Solution Approach 1:
The patent implements a feedback control mechanism where the actual rolling speed is detected in real-time and fed back to the pressure control system. The pressure is then adjusted based on the difference between the preset speed and actual speed, ensuring the pressure matches the actual rolling conditions and reducing the error of the rolled pole piece.
Solution Approach 2:
The patent transitions from a static preset pressure control method to a dynamic pressure control method. The pressure is no longer fixed but varies dynamically based on the actual rolling speed, allowing the system to adapt to speed fluctuations and maintain optimal pressing conditions throughout the rolling process.
2Manufacturing precision
If pressure is controlled only according to rolling speed, then the control parameter is simple, but it cannot satisfy actual needs, resulting in poor compaction density
Solution Approach 1:
The patent changes the control parameters from a single parameter (rolling speed) to multiple parameters (rolling speed and pole piece thickness). By considering both parameters, the pressure control becomes more adaptable to actual pressing conditions, achieving better compaction density and reducing errors in the rolled pole piece.
Data Source
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AI summary
A cold press pressure control method includes: acquiring a current thickness of a cold-pressed pole piece and a current rolling speed of a cold press at the moment; determining a cold press output pressure or a cold press adjust pressure corresponding to the current thickness of the pole piece and the current rolling speed of the cold press according to the current thickness of the cold-pressed pole piece and the current rolling speed of the cold press at the moment, as well as a preset first association relationship or a preset second association relationship; and controlling the cold press to perform pressure output according to the cold press output pressure or the cold press adjust pressure, so that at the next moment, the cold press performs cold pressing on the pole piece according to the cold press output pressure. An electronic device for implementing the method is also provided. By means of the present method and electronic device, the pressure output by the cold press can be adaptively adjusted, so that the cold press output pressure matches the actual rolling speed. The influences of the pole piece thickness and the rolling speed of the cold press on the pressure required by the pole piece are also considered simultaneously, so that the pressure output by the cold press can be more in line with actual needs.