Solid-State Battery Edge Insulation to Prevent Collector-Layer Peeling
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Solution Overview
Problem
Existing solid-state batteries face issues with insulating member peeling and reduced reliability due to interference between the second current collector layer and the insulating member when applied at the edge of the electrode stack, leading to potential short circuits.
Innovation Solution
The solution involves disposing an insulating member on at least part of the electrode stack edge, joining it with the second current collector layer, and extending it along the collector layer to enhance adhesion and prevent peeling, using thermoplastic or curable resins for solidification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulating member is applied at the edge of the preliminary stack before layering the second current collector layer, then the insulating member can prevent short circuiting, but the insulating member peels from the electrode stack due to interference with the second current collector layer
Solution Approach 1:
The insulating member is applied in advance to the preliminary stack (before the second current collector layer is added) at the edge where short circuiting may occur. This preliminary insulation layer is then covered by the second current collector layer, creating a sandwich structure that prevents both short circuiting and peeling, as the second current collector layer acts as an additional anchoring layer that secures the insulating member in place.
2Reliability
If the insulating member is extended to cover the second current collector layer, then adhesion is improved and peeling is prevented, but material usage increases
Solution Approach 1:
The insulating member is applied locally only at the edge of the preliminary stack where short circuiting risk exists, rather than covering the entire electrode stack. This localized application reduces insulating material consumption while maintaining insulation reliability at the critical area. The second current collector layer then extends over this localized insulating member to provide mechanical anchoring without requiring additional insulating material elsewhere.
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 ensures high reliability of insulation by preventing insulating member peeling and reinforcing the current collector layer, resulting in improved battery insulation and reduced material usage.
Implementation Method 1
the insulating member is joined with the electrode stack and the second current collector layer
Data Source
AI summary
The present disclosure provides a solid-state battery with highly reliable insulation by an insulating member. The solid-state battery 10 of the disclosure comprises an electrode stack 110.The electrode stack has a first current collector layer 111, a first electrode active material layer 112, a solid electrolyte layer 113, a second electrode active material layer 114 and a second current collector layer 115, in that order. An insulating member 120 is disposed on at least part of the edge of the electrode stack. The second current collector layer extends from the edge of the electrode stack on which the insulating member is disposed, and the insulating member is joined with the electrode stack and second current collector layer. The insulating member extends from the edge of the electrode stack along the second current collector layer.