Battery Coating Die With Removable Spacer Shims for Multi-Lane Tuning
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Solution Overview
Problem
The existing coating dies for lithium secondary batteries face difficulties in adjusting the coating width, loading, and mismatch of active material slurry or insulating liquid across multiple lanes due to integrated shim assemblies, which lack precision in design and assembly, especially as the number of lanes and current collector widths increase.
Innovation Solution
A coating die with a shim assembly that includes individually removable spacer shims, allowing for adjustable coating width, loading, and mismatch between active material slurry and insulating liquid, featuring a body shim with an outlet port and spacer shims with insulating flow passages, coupled using fixing pins and bolts for precise control and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an integrated shim assembly is used to form multiple lanes, then the structure is simplified and assembly is easier, but the precision of individual lane adjustment and the design complexity increases
Solution Approach 1:
The shim assembly is segmented into a body shim and multiple detachable spacer shims. Each spacer shim can be independently adjusted, removed, or added to control the insulating liquid discharge for each lane. This segmentation allows precise individual lane adjustment while maintaining an integrated assembly structure that is relatively easy to manufacture and assemble.
2Productivity
If the number of lanes increases and current collector width increases, then production capacity increases, but the precision design and assembly of spacer shims becomes more difficult
Solution Approach 1:
The shim assembly is divided into a body shim and multiple detachable spacer shims, one for each lane. This segmentation allows each spacer shim to be independently designed and adjusted, making it easier to manage complexity as the number of lanes increases. Each spacer shim can be precisely positioned to control insulating liquid discharge for its specific lane, enabling high production capacity with manageable design and assembly complexity.
3Stability of the object's composition
If spacer shims are integrated into the body shim, then the assembly is more stable, but the adjustability of coating width, loading, and mismatch for each lane is reduced
Solution Approach 1:
The spacer shims are designed to be detachably coupled to the body shim, creating a dynamic assembly that can be reconfigured. The coupling structure allows spacer shims to be removed, added, or repositioned while maintaining stable attachment during operation. This dynamic design enables adjustment of coating width, loading, and mismatch for each lane while preserving assembly stability during the coating process.
Data Source
AI summary
The present disclosure relates to a coating die for a lithium secondary battery.The coating die includes an upper die plate, a lower die plate, and a shim assembly interposed between the upper die plate and the lower die plate.The shim assembly includes a body shim and one or more spacer shims, andthe spacer shims are formed to be individually removable from the coating die such that the number and position of the spacer shims are adjustable.