All-Solid-State Battery Activation With Fluid Pressure Equalization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for manufacturing all-solid-state batteries fail to apply uniform pressure during activation, leading to interface separation and reduced lifespan due to gas generation, which is exacerbated by the non-uniform distribution of external pressure on the battery's surface.
Innovation Solution
A method involving coupling a positive electrode, negative electrode, and solid electrolyte, placing the all-solid-state battery in a jig, inserting a fluid between the battery and the jig, fixing the battery, and charging/discharging to apply uniform pressure, using a sealed pouch or can to contain the fluid, and optionally repeating the charging/discharging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform pressure is applied to the battery during activation, then interface separation is prevented and battery lifespan is improved, but the complexity of the manufacturing process increases due to the need for fluid introduction and pressure control systems
Solution Approach 1:
A fluid (gas or liquid) is introduced as an intermediary substance between the battery and the pressurization system. The fluid transmits pressure uniformly to the battery surface, preventing interface separation while avoiding direct mechanical contact that would create complex pressure distribution issues. The fluid acts as a mediator that simplifies the pressure application mechanism.
Solution Approach 2:
The invention utilizes pneumatic or hydraulic principles by introducing a fluid into the space between the battery and the activation system. This fluid-based pressurization method enables uniform pressure distribution across the battery surface, improving reliability without requiring complex mechanical pressure control systems.
2Stress or pressure
If a fluid is introduced to apply uniform pressure, then pressure distribution is improved, but the volume of the battery system increases due to the space required for fluid containment and introduction
Solution Approach 1:
The jig serves multiple functions: it provides structural support during activation, contains the fluid for pressure application, and acts as a sealing chamber. This multi-functionality eliminates the need for separate fluid containment structures, thereby avoiding additional volume increase while achieving uniform pressure distribution.
Solution Approach 2:
The fluid containment space is nested within the existing jig structure. The jig is designed to accommodate the fluid volume needed for pressurization without requiring external containment structures. This nesting approach minimizes the overall volume increase of the battery system.
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
The method ensures uniform pressure application, preventing interface separation and enhancing the battery's lifespan by maintaining consistent contact area and reducing internal resistance.
Implementation Method 1
placing a fluid between at least one surface of the all-solid-state battery and the jig... The fluid uniformly pressurizes the respective unit batteries
Implementation Method 2
During the initial charging and discharging process, a protective film is formed on the surface of an electrode, and an electrolyte is decomposed, whereby a large amount of gas is generated
Data Source
AI summary
A method of applying uniform pressure to an all-solid-state battery during activation of the battery and preventing an interface contact surface from being separated as the result of gas generated in the all-solid-state battery is provided. This method increases the lifespan of the battery and an all-solid-state battery manufactured using the same method.