Electrolyte Fluid Metering for Lithium Cell Capacity and Safety
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Solution Overview
Problem
Conventional lithium-ion batteries face challenges in maintaining optimal electrolyte fluid levels, leading to reduced capacity, safety concerns, and shortened lifespan due to parasitic secondary reactions and aging-related degeneration, which existing technologies fail to adequately address.
Innovation Solution
A battery system incorporating a lithium cell with a gel-like or polymer electrolyte and an electrolyte fluid metering device that allows for the controlled supply and discharge of electrolyte fluid components, using a movable reservoir and measurement-controlled system to regulate electrolyte fluid levels based on internal cell resistance and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional lithium-ion batteries use fixed electrolyte fluid levels, then manufacturing is simple, but capacity is reduced and lifespan is shortened due to parasitic reactions and aging
Solution Approach 1:
The patent implements a dynamic electrolyte management system where the electrolyte fluid level can be adjusted based on operating conditions. The metering device allows the electrolyte quantity to vary dynamically rather than remaining fixed, enabling optimization of capacity while managing degradation through controlled replenishment or removal of electrolyte fluid.
Solution Approach 2:
The system incorporates feedback mechanisms through sensors that monitor electrolyte fluid levels, temperature, and cell state. This feedback enables the control unit to automatically adjust the electrolyte quantity using the metering device, optimizing performance and extending lifespan by responding to real-time conditions such as aging-related degeneration.
2Reliability
If electrolyte fluid level is increased to maintain capacity, then ion conductivity is improved, but parasitic secondary reactions increase and consume electrolyte fluid
Solution Approach 1:
The feedback control system monitors electrolyte fluid levels and adjusts the quantity dynamically. When parasitic reactions consume electrolyte fluid, the sensors detect the level drop and the control unit replenishes the electrolyte through the metering device, maintaining optimal ion conductivity while compensating for losses in real-time.
Solution Approach 2:
The system changes the electrolyte fluid quantity parameter dynamically based on operating conditions. By adjusting the electrolyte level rather than maintaining a fixed high level, the system maintains sufficient ion conductivity while minimizing excess electrolyte that would be consumed by parasitic reactions.
3Device complexity
If electrolyte fluid is not replenished during aging, then device complexity is reduced, but temperature-related degeneration accelerates and lifetime is shortened
Solution Approach 1:
The electrolyte management system operates autonomously using self-service principles. Sensors automatically detect electrolyte fluid levels and temperature conditions, the control unit processes this information, and the metering device replenishes or removes electrolyte without external intervention. This self-regulating system extends lithium cell lifetime by compensating for aging and temperature-related degeneration while adding minimal operational complexity.
4Productivity
If electrolyte fluid level is optimized for high capacity, then energy output is improved, but safety concerns increase due to potential overfilling or degradation
Solution Approach 1:
The feedback control system continuously monitors electrolyte fluid levels, temperature, and cell state to maintain safe operating parameters. When the cell approaches conditions that could lead to safety issues such as overheating or excessive pressure, the system adjusts the electrolyte quantity or alerts operators, enabling high energy output while managing safety risks through real-time monitoring and control.
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 solution enables optimal electrolyte fluid management, enhancing lithium cell capacity, safety, and extending its lifespan by reducing parasitic reactions and compensating for aging and temperature-related degeneration, while maintaining high ion conductivity.
Implementation Method 1
at least one component of the electrolyte fluid can be supplied to the lithium cell and/or can be discharged from the lithium cell by the electrolyte fluid metering device
Implementation Method 2
a gel-like electrolyte or gel (polymer) electrolyte, which comprises at least one polymer that is impregnated or can be impregnated with an electrolyte fluid
Implementation Method 3
regulate electrolyte fluid levels based on internal cell resistance and temperature
Data Source
AI summary
A battery system includes at least one lithium cell with an electrolyte having at least one polymer which is configured to be impregnated with an electrolyte fluid. In order to increase the capacity, the life and the safety of the battery system, the battery system further includes at least one electrolyte fluid metering device, by which at least one component of the electrolyte fluid can be supplied to the lithium cell and/or by which electrolyte fluid can be discharged from the lithium cell.