Solid-State Battery Reference Electrode Layout for Stable Signal Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing all-solid-state batteries face challenges in accurately acquiring signals from the cathode and anode due to contamination and deterioration of the reference electrode, which can lead to increased interfacial resistance and altered performance characteristics.
Innovation Solution
Incorporating a reference electrode unit between the upper and lower stacks of the battery, with perforated holes in the current collectors filled with active material, and a control method that adjusts end voltages based on difference values and correction variables to maintain performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reference electrode is inserted into the solid electrolyte layer to separately acquire signals from cathode and anode, then signal acquisition capability is improved, but reference electrode contamination and deterioration worsen due to chemical reactions on its surface
Solution Approach 1:
The battery is divided into upper and lower stacks with the reference electrode unit positioned between them, separating the reference electrode from direct contact with individual electrode surfaces while maintaining signal acquisition capability through the solid electrolyte layers
Solution Approach 2:
Ion transport layers are introduced as intermediary components between the reference electrode and the electrode surfaces. These layers allow ionic conduction and signal transmission while preventing direct chemical reactions that would cause reference electrode contamination and deterioration
2Device complexity
If reference electrode is placed directly in contact with electrode surfaces, then signal acquisition is simplified, but interfacial resistance increases and performance characteristics are altered
Solution Approach 1:
Ion transport layers serve as intermediary components between the reference electrode and electrode surfaces, maintaining low interfacial resistance through ionic conduction while preventing direct contact that would alter performance characteristics
Solution Approach 2:
The ion transport layers are designed with porous structures that facilitate ionic transport while providing sufficient contact area for signal acquisition, balancing electrical performance with protective functionality
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 design allows separate signal acquisition from the cathode and anode while minimizing deterioration, improving lifespan and efficiency, and enabling collective or individual control of battery cells.
Implementation Method 1
a solid electrolyte layer, active material layers located on both surfaces of the solid electrolyte layer
Implementation Method 2
a reference electrode unit located between the upper stack and the lower stack, wherein the reference electrode unit includes an upper ion transport layer, a lower ion transport layer, and a reference electrode interposed between the upper ion transport layer and the lower ion transport layer
Data Source
AI summary
Disclosed are an all-solid-state battery including a reference electrode and a control method thereof. The all-solid-state battery includes the reference electrode located between an upper stack including one or more unit cells and a lower stack including one or more unit cells to determine potentials of electrodes in the all-solid-state battery so as to control driving of the all-solid-state battery.