Integrated Reference Electrode Separator for Battery Testing
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Solution Overview
Problem
Current lithium-ion battery systems for xEVs face challenges in optimizing battery performance, increasing travel distance without recharging, and reducing costs, particularly in monitoring the state of charge (SOC) effectively.
Innovation Solution
A battery cell separator assembly with a base layer, first and second contacts, and a reference component is introduced, which includes a porous, permeable composite with a ceramic coating, allowing lithium ions to pass through and enabling accurate SOC monitoring by measuring voltage differences between the reference component and electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a battery cell testing fixture with integrated reference electrode is used, then measurement precision of SOC is improved, but device complexity increases
Solution Approach 1:
The reference electrode is integrated directly into the separator structure, merging two previously separate components (separator and reference electrode) into a single unified component. This integration eliminates the need for separate reference electrode assemblies while maintaining accurate SOC monitoring capability through the embedded reference electrode that directly contacts the electrolyte.
Solution Approach 2:
The separator serves multiple functions simultaneously: it acts as both the physical barrier between electrodes and as the housing for the reference electrode. The porous structure of the separator provides both mechanical separation and ionic conductivity pathways, while also serving as the medium through which the reference electrode measures cell potential, thereby achieving multi-functionality.
2Productivity
If real-time SOC monitoring is implemented, then battery performance optimization is improved, but device complexity increases
Solution Approach 1:
The integrated reference electrode provides continuous real-time voltage measurements of the battery cell through the separator structure. This feedback mechanism enables ongoing monitoring of SOC and cell health status, allowing for dynamic optimization of battery performance and charging strategies based on actual cell conditions without requiring complex external monitoring systems.
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 enhances battery performance, safety, and SOC monitoring accuracy, allowing for real-time feedback and remote management of battery health, thereby extending battery life and optimizing energy usage in xEVs.
Implementation Method 1
The base layer is a porous, permeable composite that allows lithium ions to pass through
Implementation Method 2
enabling accurate SOC monitoring by measuring voltage differences between the reference component and electrodes
Data Source
AI summary
A battery cell testing fixture is provided which includes a user interface, a separator assembly and an optional stand. The user interface includes a module for receiving input voltage data from at least one circuit to provide a variety of battery cell conditions. The separator assembly includes an integrated reference electrode or reference component. The separator assembly is operatively configured to be used with a plurality of test batteries in succession. The separator assembly may be operatively configured to communicate with a current collector, a meter and the user interface.