Insulating Liquid Header Layout for Uniform Multi-Row Coating
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Solution Overview
Problem
In multi-row simultaneous coating of lithium secondary battery electrodes, existing insulating liquid supply devices face challenges in maintaining uniform flow rates and qualities due to differences in transfer pipe lengths and pressures, leading to uneven insulating liquid discharge from slot dies.
Innovation Solution
The proposed insulating liquid supplying device includes an insulating liquid tank, a cylindrical header, transfer pipes, and supply pipes connected to the header, with all supply pipes having the same length and diameter to minimize pressure losses, and a configuration where the pressure loss of the header is less than that of the supply pipes, ensuring uniform flow rates through multiple outlets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transfer pipes are used to supply insulating liquid to multiple slot dies, then multi-row simultaneous coating is enabled, but flow rate differences occur due to varying pipe lengths and pressure losses
Solution Approach 1:
The system is divided into multiple independent transfer pipes, each equipped with its own transfer pump and flow rate controller. This segmentation allows each pipe to be controlled independently, compensating for differences in pipe length and pressure loss to achieve uniform flow rates across all slot dies.
Solution Approach 2:
The flow rate parameters are individually adjusted for each transfer pipe based on its specific characteristics (length, pressure loss). By changing the flow rate parameter independently for each pipe, the system compensates for structural differences and achieves uniform insulating liquid discharge from all slot dies.
2Manufacturing precision
If individual transfer pumps are provided for each transfer pipe, then flow rate control is possible, but system complexity and management difficulty increase
Solution Approach 1:
Each transfer pump's operating parameters (speed, flow rate) are individually adjustable and controllable. This allows precise flow rate control for each pipe while using standard pump components, balancing control precision with system manageability.
3Area of stationary object
If transfer pipes of different lengths are used to reach multiple slot dies, then multi-row coating coverage is improved, but pressure loss varies significantly
Solution Approach 1:
The flow rate parameter is adjusted for each transfer pipe based on its length and pressure loss characteristics. Longer pipes receive higher flow rate settings to compensate for greater pressure losses, ensuring uniform discharge pressure and flow rate at all slot dies despite varying pipe lengths.
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 ensures consistent flow rates and uniform discharge pressure across all nozzles, addressing the issue of uneven insulating liquid distribution and enhancing the efficiency of multi-row simultaneous coating processes.
Implementation Method 1
a transfer pump provided in the transfer pipe to provide pressure to transfer insulating liquid from the insulating liquid tank to the slot die
Implementation Method 2
a cylindrical insulating liquid header receiving insulating liquid transferred from the insulating liquid tank, and conveying the received insulating liquid to a slot die; the supply pipes are connected to the upper part of the insulating liquid header; the pressure loss of the header is less than that of the supply pipe
Data Source
AI summary
An insulating liquid supplying device includes an insulating liquid tank for receiving insulating liquid, a slot die for discharging insulating liquid to the outside, and an insulating liquid header located at the upper part of the slot die for conveying insulating liquid transferred from the insulating liquid tank to the slot die. A pipe connecting the insulating liquid tank, slot die, and insulating liquid header permits transfer of the insulating liquid, and a transfer pump is provided in the pipe to transfer insulating liquid from the insulating liquid tank to the slot die.