Solid-State Battery Case Assembly Using Elastic Pressure Planarization
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Solution Overview
Problem
The development of all-solid-state rechargeable batteries is hindered by the need for safe, high-energy density, and large-capacity designs that address the risk of liquid electrolyte leakage and explosion.
Innovation Solution
A method for manufacturing an all-solid-state rechargeable battery involves placing a first angular case with a concave surface against a second angular case, incorporating an elastic member, and planarly deforming the cases to engage and weld lateral engagement portions, ensuring secure assembly of the battery components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid electrolyte is used in the battery, then high ionic conductivity is achieved, but the risk of leakage and explosion increases
Solution Approach 1:
The patent changes the physical state parameter of the electrolyte from liquid to solid, transforming it into a solid electrolyte. This parameter change eliminates the harmful effects of liquid electrolyte leakage and explosion while maintaining ionic conductivity through the solid state material properties
Solution Approach 2:
The patent employs a solid electrolyte that replaces the liquid electrolyte, effectively discarding the problematic liquid component and using a solid alternative that inherently prevents leakage and explosion risks associated with liquid electrolytes
2Quantity of substance
If the battery is designed for high energy density and large capacity, then performance is improved, but structural integrity and safety are compromised
Solution Approach 1:
The patent uses a composite structure combining solid electrolyte with electrode materials designed for high energy density and large capacity. This composite approach maintains structural integrity while achieving the desired performance characteristics through material composition optimization
Solution Approach 2:
The patent changes the electrolyte state to solid, which fundamentally alters the structural properties of the battery, enabling high energy density and large capacity designs while maintaining structural integrity and safety
3Adaptability or versatility
If angular cases with concave surfaces are used for battery assembly, then structural flexibility is improved, but manufacturing precision is worsened
Solution Approach 1:
The patent incorporates elastic members during assembly that apply pressure to planarize the concave surfaces of the angular cases. This preliminary action of applying pressure during assembly transforms the non-planar surfaces into planar contact surfaces, ensuring precise electrical connections while maintaining the structural flexibility of the angular case design
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 method enables the safe assembly of high-energy density and large-capacity all-solid-state batteries by preventing electrolyte leakage and explosion, while maintaining structural integrity and performance.
Implementation Method 1
at least one elastic member extending in a vertical direction from respective ends of the unit cell
Implementation Method 2
The first lateral engagement portion and the second lateral engagement portion may be welded together
Data Source
AI summary
A method for manufacturing an all-solid-state rechargeable battery includes placing a first angular case with a concave first outer surface to face a second angular case, placing a rechargeable all-solid-state battery cell including a positive electrode, a solid electrolyte layer, a negative electrode, and at least one elastic member between the first angular case and the second angular case, and planarly deforming the first outer surface of the first angular case by engaging the first angular case and the second angular case.