Resin Anode Cup for Automated Lithium Battery Fabrication
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Solution Overview
Problem
The traditional manual process of fabricating medical-grade lithium anodes for electrochemical cells is labor-intensive, leading to high costs, variability, and inconsistencies in manufacturing yield and quality.
Innovation Solution
An automated anode processing apparatus and method that uses a resin-based anode cup with a continuous surface and enclosed sides to receive a current collector and anode material, allowing for automated pressing and separator wrapping, eliminating the need for manual peeling of polymer sheets and enabling mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual pressing process with polymer sheets is used, then anode fabrication can be performed, but labor intensity and process complexity increase significantly
Solution Approach 1:
The invention extracts and eliminates the temporary polymer sheets (release liners, insert sheets, parting sheets) from the fabrication process. By removing these intermediate protective elements, the process is simplified to direct pressing of anode material against the die with the current collector, reducing labor intensity and process complexity while maintaining product quality.
Solution Approach 2:
The die is designed to serve multiple functions simultaneously: it acts as the pressing tool, the support structure, and the release surface for the anode. The current collector integrated into the die eliminates the need for separate protective sheets, allowing one component to perform what previously required multiple temporary elements.
2Ease of manufacture
If manual peeling and wrapping process is used, then anode assembly can be completed, but manufacturing yield and consistency decrease
Solution Approach 1:
The current collector is pre-integrated into the die structure before the anode material is introduced. This preliminary positioning ensures precise alignment and eliminates the need for manual peeling and wrapping operations that follow pressing, thereby improving manufacturing yield and quality consistency through automated, repeatable positioning.
3Object-affected harmful factors
If multiple polymer sheets are used during pressing, then anode material is protected from die contact, but material waste and process time increase
Solution Approach 1:
The invention removes the multiple polymer sheets (insert sheet, parting sheet, release liner) from the process. By extracting these temporary protective elements, the processing time is reduced and material waste is eliminated, while the integrated current collector in the die provides the necessary protection and release functionality without requiring additional sheets.
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 simplifies the anode fabrication process, reduces labor costs, increases manufacturing consistency and quality, and facilitates automated mass production of anode structures for medical-grade batteries.
Implementation Method 1
The entire anode subassembly is then pressed (preferably in a correspondingly dimensioned die) with an articulated ram head or other compression-applying apparatus
Data Source
AI summary
Lithium is a soft malleable metal and sticks to most materials when a fresh surface is exposed. Currently lithium anodes are pressed in a die with temporary polymer components protecting the pressing die. During anode pressing, the lithium anode sticks to these temporary components. They facilitate easy release of the lithium anode from the die via operator intervention. The pressed anode is then manually wrapped with a micro-porous polymeric separator material and built into the battery. This process is labor intensive and would be difficult to automate. By utilizing a formed polymer cup on the anode, both the anode pressing process and separator sealing process would be simplified and have potential options for automation. The cup would allow easy release from the anode pressing die and provide some of the insulation of the anode from regions of opposite polarity.