Pouch All-Solid-State Battery Reference Electrode Design
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Solution Overview
Problem
Current all-solid-state batteries lack the capability to accurately measure the detailed properties of individual electrodes due to their two-electrode configuration, which limits their ability to achieve high capacity and energy density.
Innovation Solution
A pouch-type all-solid-state battery design incorporating a reference electrode with specific structural and manufacturing conditions, including a reference electrode portion positioned between the solid electrolyte and positive or negative electrode portions, and a method for manufacturing this battery that involves laminating the electrodes and pressurizing the exterior material at 300 MPa or greater.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a two-electrode cell configuration is used, then the device complexity is reduced, but the measurement precision of individual electrode properties deteriorates
Solution Approach 1:
The patent divides the measurement function by introducing a reference electrode that separates the measurement of positive and negative electrode properties from the overall cell measurement, enabling independent analysis of each electrode's potential curve and resistance characteristics
Solution Approach 2:
The reference electrode acts as an intermediary element that provides a stable reference potential, allowing the measurement system to distinguish between the contributions of the positive electrode, negative electrode, and solid electrolyte to the overall cell voltage and impedance
2Measurement precision
If a reference electrode is inserted into the pouch-type battery, then the measurement precision of electrode properties is improved, but the device complexity increases
Solution Approach 1:
The reference electrode structure is nested within the existing pouch-type battery architecture, with the reference electrode portion positioned between the solid electrolyte and electrode portions, and the reference electrode tap integrated into the exterior material without requiring separate housing or complex assembly procedures
Solution Approach 2:
The reference electrode serves multiple functions: providing a stable reference potential for voltage measurements, enabling impedance spectroscopy analysis, and facilitating separate measurement of positive and negative electrode properties, thereby making the pouch-type battery a versatile analytical platform
3Measurement precision
If the reference electrode portion is positioned between the solid electrolyte and electrode portions, then the measurement precision is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The reference electrode portion is positioned and secured between the solid electrolyte and electrode portions before the lamination and pressurization steps, ensuring proper alignment and contact interfaces are established in advance of final assembly, which simplifies the overall manufacturing process
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 enhances the accuracy of potential and resistance measurements for both negative and positive electrodes, allowing for detailed analysis and improved performance by ensuring proper operation of the reference electrode.
Implementation Method 1
sealing the exterior material; and pressurizing the result
Data Source
AI summary
The present disclosure relates to a pouch-type all-solid-state battery with a reference electrode inserted and a method for manufacturing the same. The pouch-type all-solid-state battery with a reference electrode inserted includes a unit cell including a negative electrode portion, a positive electrode portion, and a solid electrolyte portion interposed between the negative electrode portion and the positive electrode portion and having a sheet shape; an exterior material provided with a space capable of accommodating the unit cell therein; a reference electrode tap adjacent to the solid electrolyte portion, and formed inside the exterior material; and a reference electrode portion positioned between the solid electrolyte portion and the reference electrode tap, and formed inside the unit cell.