Electrode Plate Manufacturing Temperature Control
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Solution Overview
Problem
Existing electrode plate manufacturing methods face challenges in producing long electrode plates with a uniform active material layer thickness due to temperature-induced roll expansion, leading to varying layer thicknesses.
Innovation Solution
The introduction of flow passage rolls with circulating fluid systems to regulate roll temperatures, combined with carbon fiber layers for enhanced heat transfer and durability, helps maintain uniform thickness by minimizing temperature changes in the rolls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electrode material is pressed between the first roll and the second roll, and the active material layer is transferred onto the current collecting foil, then the electrode plate is formed, but heat is generated due to friction causing roll temperature increase and radial expansion, leading to varying active material layer thickness
Solution Approach 1:
The patent introduces cooling channels within the roll structure to perform preliminary cooling action before the friction heat can cause significant temperature increase and radial expansion. This preventive cooling approach maintains roll dimensions and gap stability, ensuring uniform active material layer thickness throughout the manufacturing process
Solution Approach 2:
The patent introduces a cooling fluid as an intermediary substance that circulates through the cooling channels in the rolls. This fluid acts as a heat transfer medium, absorbing friction heat generated during the pressing and transfer operations, thereby preventing roll temperature increase and maintaining manufacturing precision
2Ease of manufacture
If the rolls are used to press and transfer the active material layer, then the electrode plate is manufactured, but the friction between rolls causes temperature increase and radial expansion, changing the gap at the facing positions
Solution Approach 1:
The patent employs hydraulic or pneumatic cooling systems where cooling fluid is pumped through channels embedded in the roll structure. This fluid circulation system efficiently removes friction heat generated during the pressing and transfer operations, maintaining roll temperature within acceptable ranges and preventing thermal expansion that would alter the gap dimensions
3Productivity
If the rolls operate continuously to form long electrode plates, then productivity increases, but temperature accumulation causes radial expansion and gap variation, affecting thickness consistency
Solution Approach 1:
The cooling channels are pre-integrated into the roll structure to provide continuous cooling action throughout the manufacturing process. This preliminary and ongoing cooling prevents temperature accumulation that would occur during continuous operation, maintaining roll gap stability and ensuring consistent active material layer thickness even when producing long electrode plates
Solution Approach 2:
The patent implements continuous cooling fluid circulation through the roll channels during the entire electrode plate manufacturing process. This continuous cooling action maintains constant roll dimensions and gap measurements throughout production, enabling both high productivity and consistent manufacturing precision for long electrode plates
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 effectively suppresses roll temperature changes, maintaining consistent active material layer thickness across the electrode plates, ensuring high-quality manufacturing.
Implementation Method 1
a circulating unit configured to circulate a fluid through the flow passage... circulating the fluid through the flow passage by the circulating unit... suppresses change in temperature of a roll... in contact with at least one flow passage roll
Implementation Method 2
heat is generated at the facing position between the first roll and the second roll and at the facing position between the second roll and the third roll due to friction therebetween
Implementation Method 3
The increase in temperature causes the first roll, the second roll, and the third roll to expand in a radial direction
Data Source
AI summary
An electrode plate manufacturing method of the present disclosure uses an electrode plate manufacturing apparatus including: a first roll and a second roll facing each other at a first position; and a third roll facing the second roll at a second position, and the manufacturing method rotates the first to the third rolls, feeds an electrode material at the first position, and brings a current collecting foil to pass through the second position. The electrode plate manufacturing apparatus includes: a flow passage roll having a flow passage thereinside and an outer circumferential surface disposed to be in contact with an outer circumferential surface of at least one of the first roll, the second roll, and the third roll; and a circulating unit circulating a fluid through the flow passage. The circulating unit circulates the fluid through the flow passage of the flow passage roll during manufacturing the electrode plate.