Axial Roller Thermal Control for Electrode Plate Thickness Uniformity
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Solution Overview
Problem
The thickness consistency of rolled electrode plates in power battery production is poor due to inconsistent roll gaps between rollers, leading to performance and consistency issues in power batteries.
Innovation Solution
A rolling device with a heat exchange assembly and adjustment assembly that adjusts the temperature of the rolling surface along the axial direction of the roller, utilizing thermal expansion and contraction principles to maintain consistent roll gaps, and an optional dust removal mechanism to clean the surface, ensuring uniform thickness and improved battery performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional rolling is used without temperature control, then the rolling process is simple, but the thickness consistency of the rolled electrode plate is poor
Solution Approach 1:
The patent applies parameter changes by controlling the temperature of the rolling surface through heating and cooling assemblies. By adjusting the temperature parameter of the rolling surface, the roll gap consistency is improved, which directly enhances the thickness consistency of the rolled electrode plate. The temperature parameter is changed dynamically during the rolling process to compensate for thermal expansion and contraction of the rollers.
Solution Approach 2:
The patent utilizes thermal expansion and contraction principles to adjust the roll gap. When the rolling surface temperature increases, the roller expands, reducing the roll gap. When the temperature decreases, the roller contracts, increasing the roll gap. This thermal expansion effect is leveraged to maintain consistent roll gap across different regions of the roller, thereby improving thickness consistency of the electrode plate.
2Manufacturing precision
If the roll gap is not adjusted, then the device operation is simple, but the thickness consistency of the rolled product deteriorates
Solution Approach 1:
The rolling device implements self-service by automatically adjusting the roll gap through temperature control of the rolling surface. The heating and cooling assemblies automatically regulate the roller temperature based on the roll gap requirements, eliminating the need for manual intervention to maintain consistent thickness. The system self-regulates the roll gap by controlling thermal expansion and contraction of the rollers.
Solution Approach 2:
The patent changes the temperature parameter of the rolling surface to dynamically adjust the roll gap. By controlling temperature variations, the system automatically compensates for roll gap inconsistencies without requiring complex manual adjustment mechanisms, thus improving thickness uniformity while maintaining operational simplicity.
3Manufacturing precision
If heating or cooling is applied to the rolling surface, then the roll gap consistency improves, but energy consumption increases
Solution Approach 1:
The patent applies local quality by selectively heating or cooling specific regions of the rolling surface rather than the entire roller. The heating and cooling assemblies are positioned to target only the areas where roll gap adjustment is needed, thereby reducing overall energy consumption while maintaining roll gap consistency. Different regions of the rolling surface receive different thermal treatments based on local requirements.
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 solution ensures consistent roll gaps and improved thickness uniformity of rolled electrode plates, enhancing the performance and consistency of power batteries by maintaining precise temperature control and surface cleanliness.
Implementation Method 1
According to the principle of thermal expansion and cold contraction, the different regions of the rolling surface in the axial direction expand under heat or contract under cold
Implementation Method 2
According to the principle of thermal expansion and cold contraction, the different regions of the rolling surface in the axial direction expand under heat or contract under cold
Data Source
AI summary
A rolling device includes a roller, a heat exchange assembly, and an adjustment assembly. The roller is provided with a rolling surface configured to roll a target member. The heat exchange assembly is arranged opposite to the rolling surface. The heat exchange assembly is configured to adjust the temperature of the rolling surface. The adjustment assembly is connected to the heat exchange assembly and is configured to adjust the position of the heat exchange assembly in an axial direction of the roller, so as to adjust temperatures of different regions of the rolling surface of the roller in the axial direction. A rolling system includes the rolling device, a measurement device and a controller, the measurement device is configured to measure the thickness of the target member after rolling; and the controller is connected in communication with the measurement device and the adjustment assembly.