All-Solid-State Battery Laminate Edge Trimming Against Short Circuits

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional all-solid-state batteries face challenges in preventing edge collapse and short circuits at the laminated body edges due to non-uniform formation, despite measures like enclosing the positive electrode layer with an insulator.

Innovation Solution

The method involves forming a laminated body with a first and second electrode layer and a solid-electrolyte layer, followed by cutting off the outer peripheral edges to prevent edge collapse, and inclining the interface between the layers to minimize contact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a laminated body is formed as a powder film, then the battery structure is simple and easy to manufacture, but edge collapse occurs and short circuits happen at the edges

Engineering Contradiction:

Improveease of manufactureVSAvoidreliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The problematic outer peripheral edges containing powder material are removed through cutting, extracting the harmful elements that cause edge collapse and short circuits while preserving the functional core of the battery

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The edges are cut off before the battery operates, preventing edge collapse and short circuits from occurring during battery operation by eliminating the vulnerability in advance

Inventive Principle:

Principle #9Preliminary anti-action

2Reliability

If insulators are used to enclose the positive electrode layer, then short circuit prevention is improved, but the device complexity increases

Engineering Contradiction:

Improveshort circuit preventionVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Instead of adding insulator layers around the positive electrode, the solution extracts and removes the vulnerable edge regions containing powder material, achieving short circuit prevention through subtraction rather than addition

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Rather than protecting the positive electrode edges with insulators, the approach inverts the strategy by removing the edges entirely, achieving protection through elimination of the problematic structure

Inventive Principle:

Principle #13The other way round (Inversion)

3Stability of the object's composition

If the laminated body is formed uniformly across the surface, then edge collapse is prevented, but manufacturing precision requirements increase

Engineering Contradiction:

Improveuniformity of laminated bodyVSAvoidmanufacturing precision

Core Design Contradiction:

Stability of the object's compositionVSManufacturing precision

Solution Approach 1:

The solution removes the difficult-to-control edge regions with poor powder distribution, eliminating the need for high precision uniform formation across the entire surface while maintaining functional performance

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12424655B2All-solid-state battery, method for manufacturing same, and processing device

Publication Date: 2025.09.23 KANADEVIA CORP

AI summary

The present invention prevents edge collapse of an electrode layer of a laminated body included in an all-solid-state battery. A method of producing an all-solid-state battery includes: a laminated body forming step of forming a laminated body (310) including (i) a positive electrode layer (302), (ii) a negative electrode layer (304) having a polarity opposite of a polarity of the positive electrode layer (302); and (iii) a solid-electrolyte layer (303) disposed between the positive electrode layer (302) and the negative electrode layer (304); and a cutoff step of cutting off an outer peripheral edge of the laminated body (310) so as to form a laminated body containing a powder material.