Solid State Battery Charging via Ceramic Electrolyte
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Solution Overview
Problem
Lithium ion batteries with organic solvent-based liquid electrolytes face limitations in performance and safety due to low boiling and flash points, thermal instability, and sensitivity to hydrolysis, requiring stringent voltage and charge rate controls, which restrict energy and capacity utilization and increase complexity in charging methods.
Innovation Solution
The use of solid ceramic electrolytes in solid state batteries allows for wider operational voltage ranges and faster charging rates, enabling a constant current constant voltage recharge process or constant voltage recharge process within a temperature range of -20°C to 160°C, maximizing energy efficiency and minimizing recharge time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If organic solvent-based liquid electrolytes are used in lithium ion batteries, then the batteries can be manufactured with current technology, but the batteries require stringent voltage and charge rate controls which restrict energy and capacity utilization
Solution Approach 1:
The patent changes the fundamental parameter of electrolyte state from liquid to solid, enabling wider operational voltage ranges and higher charge rates without compromising safety, thus resolving the contradiction between manufacturability and energy utilization
2Ease of manufacture
If organic solvent-based liquid electrolytes are used in lithium ion batteries, then the batteries can operate with current technology, but the low boiling and flash points and thermal instability require lower charge current and rates
Solution Approach 1:
The patent changes the electrolyte from liquid to solid state, fundamentally altering thermal stability parameters and enabling high-rate charging without the safety constraints that limit productivity in liquid electrolyte systems
3Reliability
If voltage and state-of-charge limiting is applied to organic solvent-based liquid electrolyte batteries, then safety is improved, but not all the energy and capacity allowed by the battery electrochemistry are fully utilized
Solution Approach 1:
The patent changes the electrolyte state parameter from liquid to solid, which fundamentally improves safety margins while simultaneously expanding the usable voltage and state-of-charge windows, thereby resolving the contradiction between safety and energy utilization
4Reliability
If stringent voltage and charge rate controls are applied to organic solvent-based liquid electrolyte batteries, then safety and cycle life are improved, but the complexity of battery charging algorithms and systems increases
Solution Approach 1:
The patent changes the electrolyte from liquid to solid state, which inherently improves cycle life while reducing the complexity of charging control systems due to the wider operational margins and enhanced stability of solid electrolytes
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 approach enhances energy density and efficiency, reduces recharge time, and mitigates issues like cathode dissolution and electrolyte decomposition, leading to more robust and cost-effective battery management systems.
Implementation Method 1
a first constant current recharge process followed by a constant voltage recharge process
Data Source
AI summary
A method and system for recharging a solid state battery device. The method can include providing the solid state battery in a fully or partially discharged state. The solid state battery can be coupled to a pair of electrodes. An energy source coupled to the electrodes can be used to supply energy to the solid state battery. This supply of energy can use a first constant current recharge process followed by a constant voltage recharge process. This supply of energy can cause an increase of an energy level of the solid state battery to the maximum energy level within a predetermined amount of time. The predetermined amount of time can be determined as being less than a time period associated with recharging the solid state battery using solely a constant current recharge process.