Wraparound Insulation Structure for Thin Solid-State Batteries
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing batteries face issues with short circuits, foreign-body contact, and delamination due to external stress, particularly in thin and large-sized designs, leading to reliability concerns and reduced energy density.
Innovation Solution
A battery design featuring an insulating member that wraps around the side surfaces and main surfaces of the power generating element, providing anchoring and protection against external stress, while using a soft insulating material to absorb shocks and prevent delamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the battery is designed to be thin and large-sized to increase energy density, then the energy density is improved, but the reliability deteriorates due to short circuits, foreign-body contact, and delamination from external stress
Solution Approach 1:
The patent uses a resin material that forms a flexible protective layer covering the power generating element. This resin material acts as a flexible shell that provides mechanical protection against external stress while maintaining the thin profile of the battery, preventing delamination and short circuits without significantly increasing thickness
Solution Approach 2:
The patent employs a composite structure combining the power generating element with a resin material layer. This composite design integrates the functional electrode layers with a protective resin coating, creating a multi-material system that simultaneously provides electrical function and mechanical protection against short circuits and delamination
2Device complexity
If insulating spacers are disposed only in corner portions to prevent short circuits, then the manufacturing complexity is reduced, but the reliability deteriorates due to insufficient protection against delamination and foreign-body contact
Solution Approach 1:
The resin material serves multiple functions simultaneously: it provides electrical insulation to prevent short circuits, mechanical anchoring to prevent delamination, and physical barrier protection against foreign-body contact. This multi-functional approach replaces the need for separate insulating spacers and anchoring structures, simplifying the overall design while enhancing reliability
Solution Approach 2:
The patent merges the insulating function, anchoring function, and protective function into a single integrated resin material layer. Instead of using separate components for each function (insulating spacers, anchoring structures, protective coatings), the resin material combines all these functions into one unified structure that covers the power generating element
Data Source
AI summary
A battery includes a power generating element and an insulating member. The power generating element has at least one battery cell including a positive electrode, a negative electrode, and a solid electrolyte layer, and the insulating member covers a side surface of the power generating element and having contact with the side surface. The insulating member has a wraparound portion continuously extending over an area from the side surface to a main surface of the power generating element and covering the side surface and the main surface and having contact with the side surface and the main surface.