Electrode Sheet Roller Heating Path for Faster Drying
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Solution Overview
Problem
The current drying efficiency of electrode plates in lithium-ion batteries is a limiting factor for improving the speed of electrode plate coating, and existing methods often result in issues such as scratches, curling, or deviation during the drying process.
Innovation Solution
An electrode plate heating device with two roller groups and a heating assembly is used, where the electrode plate is alternately wound around guide rollers to extend its path, allowing longer heating time and maintaining a stable position, thereby optimizing drying efficiency and preventing issues like curling or scratching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the electrode plate moves quickly through the heating device, then coating speed increases, but drying efficiency decreases
Solution Approach 1:
The curved guide rollers create a serpentine path that naturally slows the electrode plate's linear progression through the device while maintaining high coating speed capability. The repeated contact points and curved trajectories extend the effective heating duration without requiring the plate to move slower overall, resolving the contradiction between speed and heating time.
Solution Approach 2:
The serpentine heating path ensures continuous contact between the electrode plate and heating assembly throughout the extended trajectory. The plate maintains constant engagement with the heating zones through multiple passes guided by the rollers, ensuring uninterrupted thermal processing even as the plate moves through the device at high speed.
2Stability of the object's composition
If the electrode plate is supported firmly during heating, then position stability improves and curling is prevented, but the plate may become bent or shaped
Solution Approach 1:
The curved guide rollers provide distributed support points along the electrode plate's trajectory rather than concentrated support at single locations. This distributed curved support maintains the plate's natural shape while preventing curling and deviation, as the rollers guide the plate through its serpentine path without imposing rigid constraints that could cause deformation.
3Stability of the object's composition
If the electrode plate is kept in a tightened state during heating, then wrinkling is prevented, but the plate may become bent
Solution Approach 1:
The serpentine path created by curved guide rollers naturally maintains tension in the electrode plate through its continuous contact with the rollers. The curved geometry distributes the tensile forces along the plate's length, preventing localized wrinkling while the distributed support points prevent excessive bending or shaping, thus maintaining surface flatness without causing deformation.
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 device improves drying efficiency and coating speed by ensuring uniform heating and reducing mechanical stress on the electrode plate, facilitating smoother movement and subsequent windup without wrinkles, thus enhancing the performance of the electrode assembly.
Implementation Method 1
After coating, it enters an oven for drying
Implementation Method 2
a heating assembly installed in the box and configured to heat the electrode plate after coated
Data Source
Figure 1~3
Figure 4~6
AI summary
The present application discloses an electrode sheet heating device, and an electrode sheet production system and method. The electrode sheet heating device (10) comprises a box body (1); two roller sets (2) which are mounted in the box body (1) and arranged at intervals in a first direction (x), each roller set (2) comprising at least one first guide roller (21) such that the electrode sheet (4) sequentially and alternately bypass all the first guide rollers (21) in the two roller sets (2); and a heating assembly (3) which is mounted in the box body (1) and configured to heat the coated electrode sheet (4).