Absolute Humidity Calculation for Battery Electrode Drying Control
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Solution Overview
Problem
The challenge in battery manufacturing is accurately controlling absolute humidity during the electrode drying process to prevent performance deterioration and potential degradation or explosion of electric vehicle battery cells due to inadequate reaction between electrodes.
Innovation Solution
An absolute humidity calculation apparatus comprising temperature and dew point sensors, and a controller that calculates absolute humidity using temperature and vapor pressure data, enabling real-time monitoring and control in battery manufacturing spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrode active material is not sufficiently dried during electrode manufacturing, then manufacturing process is faster and easier, but battery cell performance deteriorates due to inappropriate reaction between electrodes
Solution Approach 1:
The patent implements real-time monitoring of absolute humidity in the electrode drying space using sensors, with the controller receiving humidity data and comparing it against target ranges. When humidity deviates from the target, the system automatically adjusts drying conditions, creating a closed-loop feedback control system that ensures proper drying while maintaining manufacturing efficiency
Solution Approach 2:
The patent controls the absolute humidity parameter in the electrode drying space within a specific range (e.g., 0.5-5 g/m³) to optimize the drying process. By precisely adjusting and maintaining humidity parameters, the system achieves sufficient electrode drying without excessive processing time, resolving the contradiction between manufacturing speed and product quality
2Device complexity
If absolute humidity is not controlled during electrode manufacturing, then manufacturing process is simpler, but cracks occur on electrode and battery cell degrades or explodes
Solution Approach 1:
The patent introduces an intermediary control system comprising humidity sensors and a controller that mediates between the drying environment and the electrode material. This intermediary system monitors absolute humidity levels and adjusts drying conditions to prevent harmful effects like electrode cracks and battery degradation, adding complexity to the control system but eliminating physical defects
Solution Approach 2:
Real-time humidity monitoring with feedback control ensures that absolute humidity remains within safe ranges during electrode manufacturing. The controller receives continuous humidity data and automatically adjusts drying parameters, preventing electrode cracks and battery degradation while maintaining a relatively simple operational process
3Manufacturing precision
If real-time absolute humidity monitoring is implemented, then electrode drying quality improves, but device complexity increases due to additional sensors and controllers
Solution Approach 1:
The controller in the patent serves multiple functions: it receives humidity data from sensors, calculates absolute humidity based on temperature and dew point measurements, compares values against target ranges, and adjusts drying conditions. This multi-functional design reduces the need for separate dedicated components, improving electrode drying quality while limiting the increase in overall system complexity
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 solution allows for accurate real-time calculation and control of absolute humidity, reducing the risk of electrode damage and improving battery cell performance and safety by preventing cracks and ensuring proper drying during the manufacturing process.
Implementation Method 1
a first sensor configured to measure a temperature in a battery manufacturing space and acquire temperature data
Implementation Method 2
a second sensor configured to measure a dew point in the battery manufacturing space and acquire dew point data
Implementation Method 3
the controller may be configured to calculate vapor pressure data in the battery manufacturing space on the basis of the dew point data
Implementation Method 4
the controller may be configured to calculate the absolute humidity based on the temperature data and the vapor pressure data and an absolute humidity conversion formula
Data Source
AI summary
An absolute humidity calculation apparatus according to an embodiment disclosed herein includes a first sensor configured to measure a temperature in a battery manufacturing space and acquire temperature data, a second sensor configured to measure a dew point in the battery manufacturing space and acquire dew point data, and a controller configured to calculate absolute humidity in the battery manufacturing space based on the temperature data and the dew point data.