Electrode Plate Drying Airflow Control for Uniform Battery Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current drying methods for electrode plates in secondary batteries often result in overdrying, leading to cracks, brokenness, and increased electrode resistance, while adjustments to air volume can cause uneven drying and temperature fluctuations, compromising the quality and uniformity of the dried plates.
Innovation Solution
A method and system that involve setting initial supply and exhaust air volumes to target levels, stepwise increasing these volumes with a time difference, and adjusting the heating fluid flow rate to maintain optimal temperatures, ensuring the air volume and fluid flow rates are synchronized to prevent overdrying and temperature hunting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air volume is increased to prevent overdrying, then overdrying is prevented, but pressure inside the drier varies causing deterioration of drying uniformity
Solution Approach 1:
The patent applies dynamics by making the air volume adjustable and variable over time rather than fixed. The air volume is dynamically changed according to the drying process stage: initially set to a first value, then adjusted to a second value (higher than the first) during the drying process, and finally adjusted to a third value (lower than the second) to maintain stable pressure and uniform drying conditions.
2Reliability
If air volume is adjusted to prevent overdrying, then overdrying is prevented, but temperature of hot oil fluctuates causing hunting phenomenon
Solution Approach 1:
The patent applies feedback control by monitoring the air volume and adjusting the hot oil temperature accordingly. The controller adjusts the air volume to a second value during drying, then adjusts it to a third value to stabilize pressure, and simultaneously controls the hot oil temperature to compensate for pressure variations, thereby preventing temperature hunting phenomenon and maintaining stable drying conditions.
3Ease of manufacture
If constant temperature and air volume are maintained, then drying process is simple, but overdrying occurs causing cracks and brokenness of electrode plate
Solution Approach 1:
The patent resolves this contradiction by making the drying process dynamic rather than static. Although the control logic is programmed (appearing simple), the actual drying parameters (air volume and temperature) are dynamically adjusted in stages: initially set to a first air volume, then adjusted to a second higher air volume, and finally adjusted to a third value. This dynamic adjustment prevents overdrying and associated defects while maintaining operational simplicity through automated control.
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 approach effectively prevents overdrying, maintains drying uniformity, and reduces temperature fluctuations, thereby improving the quality and consistency of the dried electrode plates.
Implementation Method 1
a heater (200) heating the fluid supplied through the fluid feeder (100)
Implementation Method 2
a drier (300) receiving the fluid heated through the heater (200) and drying the electrode plate
Data Source
AI summary
The present invention relates to a method for drying an electrode plate capable of solving an electrode plate overdrying problem and a drying uniformity deterioration problem due to a pressure change by including: a supply air volume setting step of setting an initial supply air volume introduced into a drier to a target air volume or less; an exhaust air volume setting step of setting an initial exhaust air volume to a numerical value corresponding to the initial supply air volume set in the supply air volume setting step; and an air volume adjusting step of increasing a supply air volume and an exhaust air volume from the initial air volumes set in the supply air volume setting step and the exhaust air volume setting step to designated target air volumes for a predetermined time, and a system for drying an electrode plate capable of effectively implementing the same.