All-Solid-State Battery Edge Insulation for Short Circuit Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional all-solid-state batteries using inorganic solid electrolytes have lower energy density and are prone to short circuits due to the thickness of the electrolyte membrane, which affects their stability and efficiency compared to lithium-ion batteries with liquid electrolytes.
Innovation Solution
The design involves alternately stacking units with electrode current collectors, active material layers, and solid electrolyte layers, with insulating members between edge parts to prevent short circuits and optimize energy density, and a manufacturing method that includes pressing the battery structure at specific pressures to ensure proper alignment and contact between layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the thickness of the electrolyte membrane is reduced to improve energy density, then energy density per volume and weight increases, but a short circuit between the cathode and anode may occur
Solution Approach 1:
The patent introduces insulating members as intermediary elements positioned between the electrode active material layers at the edge parts of the battery. These insulating members act as mediators that prevent direct contact between cathode and anode materials, thereby preventing short circuits while allowing the electrolyte membrane to maintain optimal thickness for high energy density.
Solution Approach 2:
The patent segments the battery structure into distinct functional zones by placing insulating members at specific locations (edge parts) rather than throughout the entire battery. This segmentation allows the central region to maintain thin electrolyte membrane for high energy density while the edge regions are protected against short circuits through the insulating members.
2Reliability
If insulating members are added to prevent short circuits, then reliability improves, but device complexity increases
Solution Approach 1:
The patent applies local quality by positioning insulating members only at the edge parts of the battery where short circuits are most likely to occur, rather than uniformly throughout the entire structure. This localized approach provides necessary protection while minimizing the addition of components and maintaining overall structural simplicity.
3Ease of manufacture
If conventional manufacturing processes are used, then manufacturing simplicity is maintained, but short circuits at the edge part may occur
Solution Approach 1:
The patent implements preliminary action by pre-positioning insulating members at the edge parts of the battery structure during the assembly process, before the battery is put into operation. This preliminary placement ensures that short circuit prevention measures are already in place during manufacturing, maintaining process simplicity while enhancing reliability.
Data Source
AI summary
Disclosed are an all-solid-state battery having high energy density and a method for manufacturing the same. One battery structure is pressed instead of pressing each cell unit, an amount of first or second electrode current collectors consumed is reduced, and insulating members are used, thereby simplifying a manufacturing process of the all-solid-state battery and allowing the all-solid-state battery to have high energy density and a stable structure.