Electrode Foil Cutting Device with Vacuum and Electrostatic Field
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Solution Overview
Problem
During the cutting of electrode foils for secondary battery cells, splatter particles from the cutting process can contaminate the foils, leading to potential internal shorts and self-discharge, and existing methods like gas flow evacuation may not ensure complete removal due to uneven airflow.
Innovation Solution
A cutting device incorporating a vacuum system and an electrostatic field generator with a grid electrode to effectively remove splatter particles by combining underpressure and electrostatic forces, ensuring consistent removal of debris from the cutting site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If gas flow evacuation is used to remove splatter particles, then some particles can be removed, but the removal is incomplete due to uneven airflow
Solution Approach 1:
The vacuum system divides the suction area into multiple independent suction openings distributed across the cutting surface. Each suction opening creates a localized vacuum zone, ensuring uniform particle removal across the entire cutting area rather than relying on a single gas flow source that creates uneven airflow patterns.
Solution Approach 2:
The patent replaces the gas flow evacuation method with a vacuum-based mechanical suction system. This substitution provides more controllable and uniform particle removal through multiple vacuum sources, eliminating the uneven airflow characteristics of the gas flow method.
2Object-affected harmful factors
If a vacuum system with multiple suction openings is used, then particle removal is improved, but device complexity increases
Solution Approach 1:
The vacuum system is integrated with the cutting device structure, where the vacuum chamber and suction openings serve dual purposes: maintaining the cutting environment and removing splatter particles. This multi-functionality reduces overall device complexity despite the enhanced particle removal capability.
Solution Approach 2:
The vacuum system components (chamber, suction openings, pump) are merged into a integrated assembly that works in conjunction with the cutting elements. This consolidation reduces the number of separate components and simplifies the overall device architecture while achieving effective particle removal.
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 combination of underpressure and electrostatic forces ensures improved cleanliness of the electrode foils by consistently removing splatter particles, enhancing the quality of the cutting process and preventing contamination that could lead to battery cell failures.
Implementation Method 1
a vacuum (50) configured for the intake of gas
Implementation Method 2
an electrostatic field generator (80) configured for generating an electrostatic field between a first electrode (72) and a second electrode (20)
Data Source
AI summary
A cutting device for cutting an electrode foil for a secondary battery cell is provided. The cutting device includes: a cutter configured for cutting an electrode foil; a vacuum configured to intake gas; and an electrostatic field generator. The electrostatic field generator includes a voltage source, a first electrode configured for electrically connecting an electrode foil and a second electrode arranged at a distance from the electrode foil at an inlet opening of the vacuum when the electrode foil is in position to be cut by the cutter.