Battery Electrolyte Injection Control via Vacuum Attainment Time
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the process of injecting liquid electrolyte into a battery under vacuum conditions, the electrolyte often vaporizes and scatters within the chamber, leading to incomplete removal and excessive injection amounts, resulting in quality deterioration and failed products due to residual electrolyte volatilization during depressurization.
Innovation Solution
A device that measures the vacuum attainment time to determine if electrolyte remains in the chamber, adjusting the injection amount downward based on this time to maintain accurate electrolyte injection, utilizing a liquid injecting pump and vacuum pump to manage pressure and prevent excessive electrolyte injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the injection amount of liquid electrolyte is increased to account for volatilization, then the volatilization loss is compensated, but the injection amount becomes excessive when electrolyte remains in the chamber from previous injections
Solution Approach 1:
The system measures the actual vacuum attainment time and uses this feedback to dynamically adjust the injection amount. When vacuum attainment time is long (indicating electrolyte remains in chamber), the system reduces injection amount accordingly. This closed-loop feedback mechanism resolves the contradiction by adapting the injection amount to actual chamber conditions rather than using a fixed compensatory amount.
Solution Approach 2:
The system changes the injection amount parameter based on the measured vacuum attainment time. By establishing a relationship between vacuum attainment time and electrolyte remaining amount, the system dynamically adjusts the injection parameter to maintain precision despite varying volatilization conditions.
2Manufacturing precision
If the vacuum pump operates continuously to remove scattered electrolyte, then the chamber remains clean for repeated injections, but the production cycle time increases
Solution Approach 1:
The system performs preliminary measurement of vacuum attainment time at the start of each injection cycle to detect the presence of remaining electrolyte before injection begins. This preliminary detection allows the system to adjust injection parameters in advance, avoiding the need for continuous vacuum operation while maintaining injection precision.
Solution Approach 2:
The system uses the natural volatilization process and vacuum attainment characteristics of the chamber itself to provide information about electrolyte remaining levels. By measuring how long the vacuum pump takes to reach target vacuum pressure, the system self-diagnoses the chamber condition and adjusts accordingly, eliminating the need for additional active cleaning mechanisms.
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 ensures proper electrolyte injection amounts even with repeated injections, preventing quality issues by accounting for residual electrolyte volatilization and maintaining optimal injection levels, thus reducing the likelihood of overweight or failed products.
Implementation Method 1
the liquid electrolyte is inevitably volatilized
Implementation Method 2
a chamber that has been sealed in a depressurized state
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention addresses the problem that the injection amount of a liquid electrolyte (26) becomes excessive because the liquid electrolyte (26) is volatilized at the time of injection if the liquid electrolyte (26) remains in a chamber (14). A device for injecting the liquid electrolyte into a battery has a liquid injecting pump (17) for injecting the liquid electrolyte into the battery (1) positioned inside the chamber (14) which has been sealed in a depressurized state and a vacuum pump (16) for depressurizing the inside of the chamber (14). A vacuum attainment time until a pressure of the inside of the chamber (14) becomes in a predetermined vacuum state is measured, and if this vacuum attainment time becomes longer than a predetermined value, the injection amount of the liquid electrolyte is corrected downwards.