Isostatic pressing device for all solid rechargeable battery
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Solution Overview
Problem
Existing battery manufacturing processes face challenges in achieving high density and safety, particularly with lithium-ion batteries that use flammable organic solvents, which can lead to overheating and fires upon short circuits.
Innovation Solution
The development of an isostatic pressing device specifically designed for solid rechargeable batteries, which applies high pressure to densify the solid electrolyte, thereby enhancing safety and energy density by minimizing the use of flammable solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lithium-ion batteries use flammable organic solvents as electrolytes, then ionic conductivity and electrochemical performance are improved, but safety deteriorates due to overheating and fire risks upon short circuits
Solution Approach 1:
The patent changes the physical state of the electrolyte from liquid to solid, fundamentally altering the safety parameters of the battery system. Solid electrolytes eliminate the fire hazards associated with flammable organic solvents while maintaining ionic conductivity through crystalline or amorphous solid structures.
Solution Approach 2:
The invention utilizes the phase transition from liquid electrolyte to solid electrolyte, leveraging the properties of solid materials (non-flammability, structural stability) to resolve the safety issue while maintaining the essential electrochemical function through solid-state ionic conduction.
2Reliability
If solid electrolyte is used in rechargeable batteries, then safety and energy density are improved by minimizing flammable solvents, but manufacturing complexity increases due to the need for high-pressure densification processes
Solution Approach 1:
The patent applies high-pressure densification during the manufacturing process before battery assembly, pre-densifying the solid electrolyte material to achieve the desired density and eliminate voids. This preliminary action simplifies subsequent assembly steps and ensures optimal performance without requiring complex in-situ densification equipment.
Solution Approach 2:
The invention replaces the need for complex heating and prolonged pressing systems with a simplified high-pressure densification approach, reducing manufacturing complexity while achieving the same densification effect more efficiently.
3Productivity
If solid electrolyte is densified during manufacturing, then safety and energy density are enhanced, but the manufacturing process requires sophisticated high-pressure equipment and extended processing time
Solution Approach 1:
The patent employs periodic high-pressure pulsing during the densification process, applying pressure in controlled cycles rather than continuous pressing. This periodic action achieves effective densification in shorter time periods while maintaining safety and energy density benefits, reducing the overall processing time compared to continuous pressing methods.
4Measurement precision
If thermocouple temperature measuring tip protrudes into the vessel, then temperature measurement accuracy of pressed medium is improved, but interference with vessel movement and operation increases
Solution Approach 1:
The patent creates a localized measurement zone by positioning the thermocouple tip at the exact location where temperature measurement is most critical (near the pressed medium). The measuring tip protrudes only as much as necessary to achieve accurate readings, while the rest of the thermocouple body remains retracted to avoid interfering with vessel operations.
Solution Approach 2:
The invention implements a dynamic thermocouple positioning system where the measuring tip can be extended or retracted based on operational requirements. During measurement phases, the tip protrudes for accurate temperature detection; during vessel loading/unloading phases, the tip is retracted to prevent interference, making the system adaptable to different operational states.
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
The isostatic pressing device effectively densifies the solid electrolyte, reducing the risk of fires and enhancing the safety and energy density of solid rechargeable batteries, making them a safer alternative to traditional lithium-ion batteries.
Implementation Method 1
a temperature measuring tip in the thermocouple protrudes from the hole on the cover to an inner surface of the cover and is in thermal contact with the pressed medium
Implementation Method 2
an isostatic pressing device for a solid rechargeable battery that applies high pressure to the all solid rechargeable battery in order to isostatically press the all solid rechargeable battery and make a solid electrolyte dense
Data Source
AI summary
An isostatic pressing device for an all solid rechargeable battery is disclosed. The isostatic pressing device includes a yoke, a vessel installed inside the yoke, a cover provided on the yoke side to close and open an inlet and an outlet on the vessel, and a thermocouple installed in a hole in the cover to detect a temperature of a pressed medium in the vessel, in which a temperature measuring tip in the thermocouple protrudes from the hole of the cover to an inner surface of the cover and is in thermal contact with the pressed medium.