All-Solid Battery Inspection via IV Input Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
All-solid batteries face challenges in identifying battery capacity where voltage abnormalities occur before they happen, making it difficult to prevent voltage abnormalities during rapid charging.
Innovation Solution
An apparatus and method that calculate the battery capacity at which voltage abnormalities occur by measuring the IV input resistance of the all-solid battery at specific SOC levels, using a storage section to store the relationship between voltage abnormalities and resistance, and a resistance calculation section to determine the battery capacity before charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If rapid charging is applied to all-solid battery, then charging speed is improved, but voltage abnormality occurs due to delayed lithium insertion reaction
Solution Approach 1:
The system performs preliminary identification of batteries at risk of voltage abnormality by measuring IV input resistance before rapid charging begins. This advance detection allows preventive measures to be taken, such as selecting batteries with appropriate capacity margins or adjusting charging parameters, thereby resolving the contradiction between rapid charging speed and voltage stability.
2Quantity of substance
If battery capacity is increased to meet demand, then energy storage is improved, but voltage abnormality becomes more likely during rapid charging
Solution Approach 1:
The system changes the parameter of battery selection by identifying and selecting batteries with specific IV input resistance characteristics that correlate with higher safe capacity for rapid charging. By measuring and comparing IV input resistance values, the system determines appropriate capacity margins, allowing larger battery capacities to be utilized safely while preventing voltage abnormalities.
3Ease of operation
If conventional inspection methods are used, then inspection simplicity is maintained, but inability to identify voltage abnormality risk before charging occurs
Solution Approach 1:
The system replaces conventional simple voltage-capacity measurements with electrical resistance measurement (IV input resistance) during charging. This substitution enables non-destructive detection of battery characteristics that correlate with voltage abnormality risk, providing valuable capacity information without complex procedures or damaging the battery.
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 the identification of battery capacity at risk for voltage abnormalities, allowing for reduced charging rates or battery replacement, thereby preventing voltage abnormalities.
Implementation Method 1
a resistance calculation section calculating the resistance based on a current and voltage of the all-solid battery in charging
Data Source
AI summary
An object of the present invention is to provide an apparatus for inspecting an all-solid battery with which a battery capacity where a voltage abnormality occurs can be grasped before the voltage abnormality occurs. The present invention is an apparatus for inspecting an all-solid battery including a storage section storing a relationship between the battery capacity where the voltage abnormality occurs and a resistance of the all-solid battery, and a resistance calculation section calculating the resistance based on a current and voltage in charging the all-solid battery, wherein the battery capacity where the voltage abnormality occurs in the all-solid battery is calculated from the relationship stored in the storage section and the resistance calculated in the resistance calculation section.