Battery Electrode Drying Screen for Uniform Airflow Distribution
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Solution Overview
Problem
Existing drying units for secondary battery electrode plates often result in uneven airflow distribution, leading to over-drying at the edges and under-drying at the center, which affects the uniformity and quality of the electrode plates.
Innovation Solution
The use of a perforated plate with uniformly spaced air holes and a screen with non-uniformly sized air holes to compensate for airflow, where the air holes at the edges have a smaller diameter and increased number, ensuring a uniform airflow distribution across the electrode plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a perforated plate with uniformly spaced and uniformly sized air holes is used for drying, then the structure is simple and easy to manufacture, but the airflow distribution becomes uneven causing over-drying at edges and under-drying at center
Solution Approach 1:
The patent applies local quality by making the air hole diameters non-uniform across the screen. Specifically, air holes at the edge regions have different diameters compared to those at the center region. This local variation in hole size compensates for the edge effect, ensuring uniform airflow distribution and drying uniformity across the electrode plate while maintaining manufacturing feasibility.
2Manufacturing precision
If air holes at edges are made smaller with increased number, then uniform airflow distribution is achieved, but the device complexity increases
Solution Approach 1:
The patent implements local quality by varying the diameters of air holes based on their position. The screen has a plurality of air holes with different diameters, where edge region holes have smaller diameters and center region holes have larger diameters. This localized differentiation achieves uniform airflow distribution without requiring complex additional components or mechanisms.
3Manufacturing precision
If uniform airflow is applied to the electrode plate, then drying uniformity is improved, but the airflow distribution becomes difficult to control due to edge effects
Solution Approach 1:
The patent resolves the airflow control difficulty by implementing local quality through non-uniform air hole diameters. The screen is designed with air holes having different diameters at different positions - smaller at edges and larger at center - which automatically compensates for edge effects and achieves uniform airflow distribution without complex control mechanisms.
Solution Approach 2:
The patent applies preliminary anti-action by pre-compensating for the edge effect through the non-uniform air hole diameter design. Before airflow is applied, the screen is configured with smaller diameters at edge regions and larger diameters at center regions, which anticipates and counteracts the tendency toward over-drying at edges, resulting in uniform airflow distribution from the start.
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 uniform drying of the electrode plates, maintaining consistent quality and performance by addressing the uneven drying issues, thereby enhancing the manufacturing process of secondary batteries.
Implementation Method 1
a screen with second air holes that are non-uniform, the screen configured to compensate for uneven airflow. The second air holes may be configured to provide an airflow amount that decreases toward a position corresponding to an edge of the electrode plate.
Implementation Method 2
The drying unit dries a solvent component from the electrode plate by spraying and applying heat air to the coated electrode plate.
Implementation Method 3
The drying unit dries a solvent component from the electrode plate by spraying and applying heat air to the coated electrode plate.
Data Source
AI summary
An apparatus for manufacturing an electrode plate of a secondary battery, the apparatus including a coating unit configured to coat a substrate with an electrode material, a roll pressing unit configured to press an electrode plate coated with the electrode material, and a drying unit configured to dry one of the electrode plate coated with the electrode material and a rolled electrode plate, wherein the drying unit includes a perforated plate with first air holes that are uniformly spaced and uniformly sized for applying heat air to the one of the electrode plate coated with the electrode material and the rolled electrode plate, and a screen with second air holes that are non-uniform, the screen configured to compensate for uneven airflow.