Battery Part Drying with Humidity and Temperature Control

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Solution Overview

Problem

The existing battery manufacturing processes face challenges in properly controlling humidity and temperature of drying agents during the drying of battery parts, leading to defects such as additive migration and cracking, which affect the quality of the battery product.

Innovation Solution

A battery manufacturing method and system that involves a drying unit, a mixing unit, and a flow generator to condition and control the humidity and temperature of a drying agent, ensuring precise control over the drying process by feeding the conditioned agent to the battery part, thereby preventing defects and enhancing product quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a drying agent is used to dry a battery part, then humidity is removed from the battery part, but the drying agent's humidity and temperature are not properly controlled, leading to defects such as additive migration and cracking

Engineering Contradiction:
Improvedrying qualityVSAvoidcontrol of drying agent parameters
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The invention applies parameter changes by controlling and adjusting the humidity and temperature parameters of the drying agent. The system modifies these parameters to optimal values to prevent defects like additive migration and cracking while maintaining efficient drying. This is achieved through a control unit that regulates the drying agent's properties before it contacts the battery part.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If drying is performed without controlling drying agent conditions, then the process is simple, but defects occur reducing product quality

Engineering Contradiction:
Improveproduct qualityVSAvoiddrying system structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The invention implements feedback control through a control unit that monitors and adjusts the drying agent's humidity and temperature. This feedback mechanism ensures that the drying process maintains optimal parameters to prevent defects, thereby improving product quality. The system continuously regulates the drying conditions based on measured parameters, creating a closed-loop control system.

Inventive Principle:
Principle #23Feedback

3Manufacturing precision

If humidity and temperature of drying agent are controlled, then defects like cracking are prevented, but the system becomes more complex

Engineering Contradiction:
Improvebattery part qualityVSAvoidmixing unit and control system
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The invention applies segmentation by dividing the drying system into distinct functional units: a mixing unit for conditioning the drying agent, a drying unit for the actual drying process, and a control unit for parameter regulation. This segmentation allows each unit to perform its specific function efficiently, enabling precise control of drying agent parameters while maintaining manageable system complexity through modular design.

Inventive Principle:
Principle #1Segmentation

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

The method and system effectively control the drying process, reducing the occurrence of defects like cracking and improving the structural quality and performance of battery electrodes, thus enhancing the overall quality of the battery product.

Implementation Method 1

A drying process may involve conducting a drying agent along the surface of the battery part such that the drying agent carries humidity away

Methodology Applied
Scientific EffectEvaporation: Evaporation

Data Source

PatentEP4280294A1Method and system for drying a battery part
Publication Date: 2023.11.22 LG ENERGY SOLUTION LTD
  • EP4280294A1 patent drawingFigure 1
  • EP4280294A1 patent drawingFigure 2
  • EP4280294A1 patent drawingFigure 3

AI summary

A battery manufacturing method comprises providing a battery part in a drying unit; providing a drying agent in a mixing unit; controlling, by the mixing unit, humidity and/or temperature of the drying agent; and feeding the drying agent from the mixing unit to the drying unit.