Stepped Die Coater Shim for Separate Battery Slurry and Edge Insulation
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Solution Overview
Problem
Existing die coater technologies face challenges in simultaneously and effectively coating electrode slurries and insulating coating liquids on current collectors for secondary batteries, often resulting in solution mixing and poor quality due to leakages.
Innovation Solution
A die coater shim and die coater configuration that includes a base with protruding guides, an electrode slurry slit with a step portion, and insulating coating liquid slits with grooves, allowing for simultaneous and separate discharge paths for the electrode slurry and insulating coating liquid, preventing mixing even if leakage occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate processes are used to apply electrode slurry and insulating coating liquid, then coating quality is maintained, but production efficiency decreases
Solution Approach 1:
The patent combines the electrode slurry coating process and insulating coating liquid application process into a single die coater device. The die coater includes a manifold with multiple outlets that can simultaneously discharge both electrode slurry and insulating coating liquid onto the current collector in one operation, thereby improving production efficiency without requiring separate coating processes
2Productivity
If independent slits are formed in a single die coater shim for discharging electrode slurry and insulating coating liquid, then simultaneous coating is achieved, but solution mixing occurs causing poor quality
Solution Approach 1:
The die coater shim is segmented into multiple independent discharge paths - one for electrode slurry and another for insulating coating liquid. Each slit is independently configured with its own discharge channel, preventing mixing of the two solutions while enabling simultaneous coating. The segmented structure ensures that each coating material is discharged through its dedicated path without interference
3Adaptability or versatility
If a single slit is used in die coater shim, then device simplicity is maintained, but only one solution can be discharged at a time
Solution Approach 1:
The die coater shim is designed with multi-functionality to handle both electrode slurry and insulating coating liquid discharge through a unified structure. The manifold and slit configuration enable the single die coater device to perform multiple coating functions simultaneously, making it versatile for different coating materials while maintaining relatively simple device architecture
Data Source
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AI summary
A die coater shim and die coater for simultaneously coating an electrode slurry and an insulating coating liquid. The die coater shim includes: a base that extends in a width direction; first and second guides that protrude and extend from both ends of the base; an electrode slurry slit that includes a step portion that extends from the base in the width direction between the first and second guides, wherein a thickness of the step portion is smaller than a thickness of the base, and a stepped space that the step portion forms relative to one surface of the base to form an electrode slurry discharge path; and first and second insulating coating liquid slits which include a groove on a surface of each of the first and second guides, wherein one end of the groove forms an insulating coating liquid discharge path.