Electrode Insulating Liquid Defoaming for Pinhole-Free Coating
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Solution Overview
Problem
Conventional electrode insulating liquid supply systems fail to effectively remove bubbles from the insulating liquid supply line, leading to pin hole defects that compromise the insulation performance and increase the risk of short circuits in batteries.
Innovation Solution
An apparatus and method that includes a storage tank, a coating die, a supply line, a pump, a defoaming tank with a vacuum pump, and a bubble sensor to monitor and adjust the operating conditions for efficient bubble removal, ensuring the insulating liquid is bubble-free before coating the electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating liquid is supplied through the supply line from the storage tank to the coating die, then the electrode insulation coating can be applied, but bubbles are generated in the supply line causing pin hole defects
Solution Approach 1:
The patent installs a defoaming tank connected to the supply line where bubbles are removed from the insulating liquid before it reaches the coating die. This preliminary defoaming action prevents bubbles from causing pin hole defects during the coating process, thereby maintaining electrode insulation performance without compromising the coating application.
2Object-generated harmful factors
If a defoaming tank with vacuum pump is installed to remove bubbles, then bubble removal efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent introduces a defoaming tank as an intermediary component between the storage tank and coating die. This separate defoaming chamber allows bubble removal through vacuum application without directly modifying the main supply line structure, thus reducing the overall system complexity while effectively addressing the bubble problem.
3Manufacturing precision
If bubble sensor and controller are added to monitor and adjust operating conditions, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent incorporates a bubble sensor that detects bubbles in the supply line and provides feedback to a controller. The controller automatically adjusts operating conditions such as vacuum pump operation or liquid flow rate based on bubble detection, ensuring consistent coating quality without requiring complex manual monitoring or adjustment systems.
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 solution significantly reduces pin hole defects by real-time bubble monitoring and controlled defoaming, enhancing the insulation performance and safety of the electrode coating process.
Implementation Method 1
a vacuum pump connected to the defoaming tank, where the vacuum pump defoams bubbles of the insulating liquid by applying vacuum to the defoaming tank
Data Source
AI summary
A method and apparatus for supplying insulating liquid to form an insulating coating layer on an electrode is disclosed herein. In some embodiments, an apparatus includes a storage tank for storing an insulating liquid; a coating die for coating the insulating liquid on an electrode; a supply line which supplies the insulating liquid from the storage tank to the coating die; a pump connected to the supply line; a defoaming tank connected to the storage tank and supplies defoamed insulating liquid to the storage tank; a vacuum pump which defoams bubbles of the insulating liquid by applying vacuum to the defoaming tank; a bubble sensor connected to the supply line, wherein the bubble sensor senses generation of bubbles in the supply line in real time; and a controller for adjusting an operating condition of the apparatus based on an amount of bubbles sensed by the bubble sensor.