Removable Spacer Shim Coating Die for Multi-Lane Battery Slurry Control
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Solution Overview
Problem
Existing coating dies for lithium secondary batteries face challenges in adjusting the coating width, loading, and mismatch of active material slurry and insulating liquid, particularly as the number of manufacturing lanes and current collector widths increase.
Innovation Solution
A coating die with a novel structure featuring individually removable spacer shims, which allows for adjustable coating width, loading, and mismatch by enabling the spacer shims to be coupled and removed from the die as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an integrated shim assembly with fixed spacer shims is used, then the structure is simple and assembly is easy, but the adjustment of coating width, loading, and mismatch for each lane is difficult
Solution Approach 1:
The shim assembly is divided into a body shim and multiple independently replaceable spacer shims. Each spacer shim can be individually adjusted or replaced to modify the coating parameters for different lanes, enabling flexible adjustment without redesigning the entire assembly.
Solution Approach 2:
The spacer shims are designed to be dynamically adjustable during operation. The individual spacer shims can be removed, added, or repositioned based on the specific coating requirements for each lane, allowing the system to adapt to different manufacturing conditions.
2Productivity
If the number of manufacturing lanes and current collector widths increase, then productivity increases, but the precision design and assembly of spacer shims becomes more difficult
Solution Approach 1:
Each lane has its own dedicated spacer shim that can be independently designed and adjusted. This segmentation allows precise control for each lane without affecting other lanes, maintaining manufacturing precision even as the number of lanes increases.
Solution Approach 2:
Each spacer shim is customized with specific dimensions, thickness, and positioning characteristics tailored to the requirements of its corresponding lane. This local optimization ensures that each lane achieves the desired coating precision while accommodating variations in current collector width and lane configuration.
3Adaptability or versatility
If spacer shims are integrated into the body shim, then the assembly is structurally simple, but individual adjustment of slurry width and loading is not possible
Solution Approach 1:
The shim assembly is segmented into a body shim that provides structural support and multiple spacer shims that provide functional adjustment capabilities. This segmentation enables individual adjustment of each spacer shim while maintaining the overall structural integrity through the body shim.
Solution Approach 2:
The spacer shims are designed as dynamic components that can be independently adjusted, removed, or replaced based on the specific coating requirements. This dynamic design allows individual adjustment of slurry width and loading for each lane while maintaining a relatively simple overall assembly structure.
Data Source
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AI summary
The present disclosure relates to a coating die for a lithium secondary battery, the coating die comprising an upper die plate, a lower die plate, and a shim assembly interposed between the upper die plate and the lower die plate, wherein the shim assembly includes a body shim and one or more spacer shims, and wherein the spacer shims are formed to be individually removable from the coating die.