Three-Electrode Battery Reference Film to Minimize Blocking Area
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Solution Overview
Problem
Conventional three-electrode systems for monitoring secondary battery states in real time suffer from performance degradation and safety issues due to the blocking area caused by the reference electrode, which can lead to internal short circuits and electrode damage.
Innovation Solution
A power supply device incorporating a three-electrode battery with a film-shaped reference electrode featuring perforated holes, which minimizes the blocking area and maintains stable performance even under long-term or multiple cycle usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wire-type reference electrode is used in a three-electrode system, then real-time monitoring of secondary battery state is achieved, but a blocking area is created causing performance degradation and safety issues
Solution Approach 1:
The patent applies this principle by replacing the conventional wire-type reference electrode with a film-shaped reference electrode. The thin film structure minimizes the blocking area while maintaining the reference electrode's functionality for real-time monitoring. The film can be integrated into the separator layer, creating a flat, minimal-profile monitoring element that does not protrude or create significant obstruction to ion flow.
Solution Approach 2:
The patent applies this principle by incorporating a porous structure into the film-shaped reference electrode. The porous material allows ion transport through the reference electrode film, reducing the blocking effect while maintaining electrical conductivity and reference potential stability. This enables the reference electrode to perform monitoring functions without significantly impeding electrolyte flow.
2Strength
If the reference electrode thickness or stiffness is increased, then structural stability is improved, but the blocking area is enlarged causing electrode damage and safety problems
Solution Approach 1:
The patent uses a thin film structure for the reference electrode that provides sufficient structural stability through the film's material properties and integration with the separator. The film is thin enough to minimize blocking area but maintains stability through its composition and bonding to the separator layer, eliminating the need for thick or stiff protruding structures.
Solution Approach 2:
The patent merges the reference electrode with the separator layer, integrating both functions into a single composite structure. This combination allows the reference electrode to gain structural support from the separator while the separator benefits from the monitoring capability, creating a unified thin structure that minimizes blocking area.
3Duration of action of moving object
If internal pressure increases due to electrode thickness or gas generation, then battery operation continues, but damage to electrodes and separators occurs causing performance degradation
Solution Approach 1:
The thin film reference electrode integrated into the separator creates a more flexible and pressure-resistant structure. When internal pressure increases, the thin integrated structure can better accommodate pressure changes without causing damage to electrodes or separators, unlike thick wire-type electrodes that create stress concentration points.
Data Source
AI summary
Provided are power supply devices. In particular, the provided power supply devices are capable of supplying power by using a secondary battery. The provided power supply devices are also capable of supplying stable power by monitoring the state of the secondary battery in real time.