Reference Electrode Pressing in Solid-State Battery Manufacturing
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Solution Overview
Problem
Current methods for manufacturing all-solid-state batteries face challenges in accurately measuring and analyzing electrochemical properties without disassembly, often resulting in defective batteries due to poor contact between the reference electrode and solid electrolyte, leading to unreliable signal detection and potential short circuits.
Innovation Solution
A manufacturing apparatus and method that compresses solid electrolyte powder with a reference electrode, eliminating the need for conductive paste and ensuring a stable, uniform interface, allowing for reliable electrochemical signal emission without distortion, and enabling the battery to be used without separation from the mold unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reference electrode is inserted into an all-solid-state battery to measure electrochemical properties, then measurement capability is improved, but contact between the reference electrode and solid electrolyte is poor, leading to unreliable signal detection
Solution Approach 1:
The patent introduces conductive paste as an intermediary material between the reference electrode and the solid electrolyte. This conductive paste fills the gaps and ensures intimate contact between the reference electrode and solid electrolyte, enabling reliable electrochemical signal detection without direct contact between the rigid reference electrode and the solid electrolyte surface.
2Reliability
If conductive paste is used to ensure contact between reference electrode and solid electrolyte, then signal detection reliability is improved, but the battery structure becomes more complex and requires additional materials
Solution Approach 1:
The conductive paste is applied locally only at the interface between the reference electrode and the solid electrolyte, rather than throughout the entire battery structure. This localized application minimizes the impact on overall battery complexity while ensuring reliable contact specifically where needed for electrochemical measurements.
3Measurement precision
If the battery is disassembled to measure electrochemical properties, then measurement access is improved, but the battery structure is damaged and lifespan is reduced
Solution Approach 1:
The reference electrode is inserted and positioned within the battery structure during the manufacturing process, before the battery is sealed and activated. This preliminary placement allows electrochemical measurements to be performed on the complete, functional battery without requiring subsequent disassembly, thereby preserving battery integrity and extending lifespan.
4Ease of operation
If the battery is separated from the mold unit after manufacturing, then the battery can be removed for use, but damage may occur during separation
Solution Approach 1:
Release structures such as hooks or tabs are pre-formed as integral parts of the battery assembly during the molding process. These pre-formed release structures enable easy separation from the mold unit without requiring forceful manual intervention that could damage the battery, thereby maintaining both ease of operation and battery integrity.
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 approach provides stable and reliable electrochemical signals, prevents signal distortion, and avoids potential damage during battery separation, ensuring high accuracy in performance evaluation and extended battery lifespan.
Implementation Method 1
a pressing unit which includes a protrusion member corresponding to the first hole, coupled with an upper part of the mold unit, and pressing downwards raw materials of the all-solid-state battery filling the first hole
Data Source
AI summary
An apparatus for manufacturing an all-solid-state battery includes: a mold unit which includes a first hole extending vertically so as to have a shape and a width identical with a shape and a width of the all-solid-state battery, and a second hole extending horizontally so as to horizontally communicate with the first hole; a first pressing unit which includes a first protrusion member corresponding to the first hole, which is coupled with an upper part of the mold unit, and which presses downwards raw materials of the all-solid-state battery filling the first hole, and a second pressing unit which includes a second protrusion member corresponding to the first hole, which is coupled with a lower part of the mold unit, and which presses upwards the raw materials of the all-solid-state battery filling the first hole.