Electrode Sheet Nozzle Layout for Compact Upstream Hot-Air Drying
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrode sheet drying apparatuses have limited flexibility in arranging hot air blowers due to their large size in the conveying direction, which increases the size of the apparatus and hinders efficient drying of the undried active material layer on the current collector foil.
Innovation Solution
The apparatus features hot air blowers with nozzles that blow band hot air in a second thickness direction opposite to the first, allowing the air to travel along the undried active material layer over a longer distance without a spread prevention part, reducing the overall size of the blower and enabling more flexible arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spread prevention part is provided at the upstream side of the nozzle to prevent band hot air from spreading in the first thickness direction, then the hot air can be effectively utilized for drying, but the overall size of the hot air blower in the conveying direction increases
Solution Approach 1:
The invention extracts and removes the spread prevention part (second wall) from the hot air blower structure. By setting the nozzle at a specific angle of 45 degrees or more relative to the first thickness direction, the patent achieves effective drying without requiring the additional wall structure, thereby reducing the overall size of the hot air blower in the conveying direction while maintaining drying reliability
Solution Approach 2:
The invention changes the angular parameter of the nozzle from a conventional smaller angle to 45 degrees or more relative to the first thickness direction. This parameter change allows the band hot air to be blown toward the obliquely upstream side effectively, achieving both drying efficiency and compact size without needing additional spread prevention structures
2Reliability
If the overall size of the hot air blower in the conveying direction is large, then the spread prevention part can be included, but the flexibility of arrangement of hot air blowers is reduced and the apparatus size increases
Solution Approach 1:
By removing the spread prevention part (second wall) and relying on the optimized nozzle angle of 45 degrees or more, the patent reduces the hot air blower size, thereby increasing the flexibility of arrangement and reducing the overall apparatus size while maintaining effective hot air control for drying
Solution Approach 2:
The specific angular parameter of the nozzle (45 degrees or more) provides optimal hot air direction control, enabling flexible arrangement of multiple blowers without requiring additional containment structures, thus improving adaptability while maintaining reliability
3Productivity
If multiple hot air blowers are arranged in the conveying direction to quickly dry the undried active material layer, then the drying speed increases, but the gap between adjacent blowers must be widened which increases the apparatus size
Solution Approach 1:
By setting the nozzle angle to 45 degrees or more relative to the first thickness direction, the band hot air is effectively directed toward the obliquely upstream side, allowing multiple blowers to be arranged closer together (reduced gap) while maintaining high drying speed, thus increasing productivity without proportionally increasing apparatus size
Solution Approach 2:
The patent uses multiple hot air blowers arranged in the conveying direction, each with optimized nozzle angles, to create segmented drying zones that work together to quickly dry the active material layer, achieving high productivity in a compact configuration
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 configuration enables efficient drying of the undried active material layer while reducing the size of the apparatus, allowing for a more compact and flexible arrangement of hot air blowers, thereby enhancing the drying efficiency and reducing the residual dispersion medium in the active material layer.
Implementation Method 1
The nozzle is configured to blow band hot air toward an obliquely upstream side from between a first upstream-side edge and a second upstream-side edge through between a first guide surface and a second guide surface
Implementation Method 2
An angle formed between the first guide surface or the second guide surface and the undried active material layer is set to an angle at which the blown band hot air travels toward the upstream side along the undried active material layer
Implementation Method 3
hot air is blown onto the undried active material layer while the undried electrode sheet is being conveyed in the longitudinal direction inside the electrode sheet drying apparatus. Thus, the undried active material layer is heated and dried
Data Source
AI summary
An electrode sheet drying apparatus includes a plurality of hot air blowers each having a nozzle. The nozzle has a first hot air guide having a first guide surface, a second hot air guide having a second guide surface. The nozzle is configured to blow band hot air toward an obliquely upstream side. An angle formed between the first guide surface and an undried active material layer is set to an angle at which the band hot air travels toward an upstream side along the undried active material layer over a distance longer than or equal to 15 times as large as a gap from a first upstream-side edge to the undried active material layer even without a spread prevention part.