Slurry Bubble Discharge Structure for Stable Battery Electrode Coating
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Solution Overview
Problem
Existing methods for removing air bubbles in secondary battery slurry are complex, require separate equipment, and are inefficient, leading to electrode defects and potential fires due to the presence of air bubbles during the manufacturing process.
Innovation Solution
An apparatus that collects air bubbles at the upper portion of a filter using a collection apparatus, discharges them externally without a separate power source, and includes a vent hole that opens in emergencies, utilizing the slurry's flow to remove air bubbles through discharge holes and a ball with specific gravity to control pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods are used to remove air bubbles in slurry, then air bubbles can be removed to some extent, but the process becomes complex and requires separate equipment
Solution Approach 1:
The patent combines the air bubble removal function with the existing slurry supply apparatus by integrating a discharge hole and discharge chamber into the pump housing. This merging eliminates the need for separate air bubble removal equipment while maintaining effective air bubble extraction from the slurry stream.
Solution Approach 2:
The pump housing is designed to serve multiple functions: it acts as both the pumping mechanism for slurry delivery and the air bubble discharge chamber. The discharge hole integrated into the housing provides a universal solution for both slurry supply and air bubble removal, reducing overall system complexity.
2Reliability
If separate equipment is used for air bubble removal, then air bubbles can be removed, but operational costs and labor requirements increase
Solution Approach 1:
The air bubble removal function is merged into the existing slurry supply apparatus, eliminating the need for separate equipment operation and reducing labor requirements. The integrated design allows the same pump system to handle both slurry delivery and air bubble discharge.
Solution Approach 2:
The apparatus performs air bubble removal as part of its normal slurry supply operation without requiring additional manual intervention or separate operational steps. The discharge hole automatically allows air bubbles to escape during the pumping process, making the system self-servicing for this function.
3Device complexity
If air bubbles are not removed from slurry, then the apparatus operates simply, but electrode defects and safety issues occur
Solution Approach 1:
The patent extracts air bubbles from the slurry stream by providing a dedicated discharge hole in the pump housing. This extraction mechanism removes the harmful air bubbles that would otherwise cause electrode defects, while adding minimal complexity to the overall apparatus.
Solution Approach 2:
The discharge hole design converts the potentially harmful accumulation of air bubbles into a beneficial continuous discharge process. By providing an escape route for air bubbles, the system transforms what would be a harmful accumulation into a controlled, continuous removal process that protects electrode quality.
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 apparatus effectively removes air bubbles without additional components, ensuring stable slurry supply, reducing labor and operational costs, and preventing defects in electrode coating.
Implementation Method 1
a ball (300) having a specific gravity of less than that of the slurry
Implementation Method 2
an air bubble discharge hole (120) extending downward from the upper side of the air bubble discharge unit (100)
Data Source
AI summary
The present disclosure relates to an apparatus for preventing the inflow of foreign substances such as air bubbles, fine particles, and air pockets, of various sizes, when coating a secondary battery coating slurry, and more particularly, to an apparatus for removing foreign substances, such as air bubbles in a supplied slurry, by discharging the foreign substances including progressive air bubbles in various forms and with various apparatuses from a location where the air bubbles are collected when supplying a secondary battery coating slurry.