Powder Hopper Sensing for Uniform Dry Electrode Calendering
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Solution Overview
Problem
Conventional electrode manufacturing processes using solvents are costly, environmentally impactful, and pose health risks due to toxic chemicals, while dry processes require consistent powder application to achieve tight tolerances.
Innovation Solution
A system comprising powder hoppers with sensors and feeder hoppers that monitor powder levels and weights to ensure consistent delivery to calendering rollers, ensuring uniform powder application and eliminating the need for solvent-based processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wet process with solvents is used for electrode manufacturing, then the manufacturing process is simpler and more established, but the process becomes costly, environmentally harmful, and dangerous due to toxic chemicals requiring recovery and disposal
Solution Approach 1:
The patent removes the harmful solvent component from the electrode manufacturing process entirely, transitioning from a wet process to a dry process. This extraction of the harmful element eliminates the need for solvent recovery systems and disposal procedures while maintaining the core manufacturing functionality through direct calendering of dry powder mixtures.
Solution Approach 2:
The patent changes the physical state parameter of the electrode material from a slurry (wet) state to a dry powder state. This parameter change fundamentally alters the manufacturing process by eliminating solvent evaporation and recovery steps, thereby removing the associated environmental and safety hazards while preserving the ability to form electrodes through calendering.
2Object-affected harmful factors
If dry powder process is used for electrode manufacturing, then solvent costs and toxicity are eliminated, but tight tolerances require consistent manufacturing process with uniform powder application
Solution Approach 1:
The patent implements a feedback control system using sensors to monitor powder characteristics (such as moisture content, particle size distribution, or flow properties) in real-time. The processor analyzes this sensor data and adjusts operating parameters of the calendering system accordingly to maintain consistent electrode thickness and quality, thereby achieving tight tolerances through closed-loop control.
Solution Approach 2:
The patent introduces dynamic adjustment capabilities to the dry powder manufacturing system, allowing real-time modification of calendering pressure, roller speed, or powder feed rate based on monitored powder characteristics. This dynamic responsiveness enables the system to compensate for variations in powder properties and maintain precise electrode thickness control.
3Loss of energy
If dry powder process is used for electrode manufacturing, then drying operations for solvent recovery are eliminated, but uniform application of powder requires sophisticated monitoring and control systems
Solution Approach 1:
The patent replaces the thermal drying system (which requires significant energy for solvent evaporation) with a mechanical sensing and control system. Instead of using heat to remove solvents, the system uses sensors to monitor powder characteristics and mechanically adjusts process parameters to ensure uniform powder application and electrode quality, thereby eliminating energy-intensive drying operations.
Data Source
AI summary
Systems and methods of providing powder are disclosed. A system includes a powder hopper, one or more sensors, a feeder hopper and a processor in operable communication with the one or more sensors and the feeder hopper. The powder hopper is configured to provide a powder to a pair of rollers. Each of the one or more sensors is configured to determine a characteristic of the powder in the powder hopper. The feeder hopper is configured to provide the powder to the powder hopper. The processor is configured to cause the feeder hopper to provide the powder to the powder hopper in response to the characteristic of the powder in the powder hopper being less than a threshold.