Solid-State Battery Pressurization Mapping for Uniform Clamping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium secondary batteries using solid electrolytes face challenges such as non-uniform pressure distribution, increased interfacial resistance, and lithium dendrite formation, which affect safety and performance, especially in medium to large-scale applications.
Innovation Solution
A method and apparatus for evaluating pressurization in all-solid-state batteries by positioning a pressure-sensitive member on the battery and using a pressurizing means to apply pressure, then determining pressure distribution through image information from the pressure-sensitive member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid electrolyte is used to replace organic liquid electrolyte, then safety is improved and electrolyte leakage is prevented, but ionic conductivity decreases and output characteristics worsen
Solution Approach 1:
The patent applies parameter changes by modifying the physical state of the electrolyte from liquid to solid, and by adjusting operational parameters such as temperature and pressure to optimize the balance between safety and ionic conductivity in solid-state batteries
2Reliability
If solid electrolyte is used, then electrolyte leakage is prevented, but interfacial resistance increases due to poor surface adhesion
Solution Approach 1:
The patent applies local quality by creating specific interfacial conditions between the solid electrolyte and electrode materials, using localized treatments or coatings to improve adhesion at the contact surfaces while maintaining the bulk properties of the solid electrolyte
3Reliability
If pressurization process is applied, then lithium dendrite formation is suppressed, but uniform pressure distribution becomes difficult to achieve
Solution Approach 1:
The patent introduces pressure-sensitive members as intermediaries between the pressurization system and the battery components. These members serve as mediators that distribute and indicate pressure distribution, enabling both uniform pressure application and visualization of the pressure field
4Duration of action of stationary object
If pressure is applied to suppress lithium dendrites, then battery lifespan is improved, but pressure distribution monitoring becomes difficult
Solution Approach 1:
The patent employs pressure-sensitive members that exhibit color changes in response to applied pressure. This visual indication system allows real-time monitoring and mapping of pressure distribution across the battery components, transforming an invisible mechanical parameter into observable optical information
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
Enables uniform pressure application and visualization of pressure distribution, ensuring safe and efficient operation of all-solid-state batteries by confirming clamping pressure and material properties.
Implementation Method 1
a pressure-sensitive member is positioned in the all-solid-state battery and then pressurized, and wherein the pressure distribution of the all-solid-state battery can be determined through image information of the pressure-sensitive member obtained by the pressurization
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The present invention relates to a method for evaluating pressurization of an all-solid-state battery comprising a solid electrolyte, comprising: (1) preparing a subject by positioning a pressure-sensitive member on at least one of an upper side or a lower side of an all-solid-state battery comprising a positive electrode, a negative electrode, and a solid electrolyte layer located between the positive electrode and negative electrode; (2) pressurizing the subject in a thickness direction of the all-solid-state battery; (3) acquiring image information of the pressure-sensitive member after the end of pressurization in step (2); and (4) determining a pressure distribution of the all-solid-state battery by the acquired image information of the pressure-sensitive member, and an apparatus for evaluating pressurization of an all-solid-state battery comprising the subject and a pressurizing means imparting image information for determining pressure distribution of the pressure-sensitive member.