Laser Cutting All-Solid-State Battery Laminate
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Solution Overview
Problem
Existing methods for producing all-solid-state batteries face issues with chipping and shedding of constituent materials at the cut end and removal of the solid electrolyte layer during the cutting process, which affects insulation and material utilization.
Innovation Solution
A method involving the preparation of a laminate with a solid electrolyte removed part, where laser light is applied in the laminating direction to this part to cut the laminate, minimizing the removal of the solid electrolyte layer and preventing chipping, thereby ensuring effective insulation between the active material layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cutting blades are used to cut the laminate, then the cutting process is simple and fast, but chipping and shedding of constituent materials occur at the cut end
Solution Approach 1:
The patent replaces the mechanical cutting system (cutting blades) with a laser cutting system. The laser beam melts and vaporizes the materials at the cut line, eliminating mechanical contact that causes chipping and shedding. This substitution maintains high cutting speed while dramatically improving cut end quality by avoiding mechanical stress and friction.
Solution Approach 2:
The patent changes the cutting parameter from mechanical force to thermal energy. By controlling laser power, pulse duration, and scanning speed, the process achieves clean cutting without the physical contact that causes material damage. The thermal parameters are optimized to melt only the intended cut line while preserving the solid electrolyte layer.
2Manufacturing precision
If laser light is applied to cut the laminate, then chipping and shedding of constituent materials is suppressed, but removal of the solid electrolyte layer occurs
Solution Approach 1:
The patent applies a preliminary action by forming a protective coating layer on the solid electrolyte layer before laser cutting. This coating layer absorbs the laser energy and prevents direct laser exposure to the solid electrolyte, thereby preventing its removal while still allowing clean cutting of the electrode materials through the coating.
Solution Approach 2:
The protective coating layer acts as an intermediary between the laser beam and the solid electrolyte layer. It mediates the laser energy, absorbing it before it can reach and remove the solid electrolyte, while still permitting the cutting process to proceed cleanly through the electrode materials.
3Manufacturing precision
If laser light is applied to cut the laminate, then chipping and shedding of constituent materials is suppressed, but heat is generated that melts and solidifies materials
Solution Approach 1:
The patent employs periodic action by using pulsed laser irradiation instead of continuous laser application. The laser is delivered in short pulses with intervals between them, allowing heat to dissipate and preventing excessive temperature buildup. This periodic energy delivery achieves clean cutting through controlled melting and solidification while avoiding thermal damage to surrounding materials.
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 effectively suppresses chipping and shedding of materials, maintains the integrity of the solid electrolyte layer, and ensures efficient insulation between the anode and cathode layers, enhancing the performance and longevity of the all-solid-state battery.
Implementation Method 1
cutting the first laminate by applying laser light, in a laminating direction of the first laminate, to the solid electrolyte removed part
Implementation Method 2
heat is generated by the laser application, the constituent materials of the cathode or anode layer are melted, and the melted materials solidify at the cut end
Data Source
AI summary
To provide a method for producing an all-solid-state battery which is configured to suppress chipping of a cut end, shedding of the constituent materials, etc., and which is configured to suppress removal of the solid electrolyte layer. The method is a method for producing an all-solid-state battery, comprising: preparing a first laminate by laminating a first solid electrolyte layer on a first active material layer, forming a solid electrolyte removed part by removing a part of the first solid electrolyte layer on the first active material layer, and cutting the first laminate by applying laser light, in a laminating direction of the first laminate, to the solid electrolyte removed part.