Battery Electrode Distance Stabilization via Pressurization
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Solution Overview
Problem
Existing methods for determining battery response characteristics are influenced by electrode expansion and contraction, inconsistent temperature and humidity conditions, and unmatched voltage scanning and time histories, leading to unstable and non-reproducible results.
Innovation Solution
The method involves pressurizing the battery to maintain a constant distance between electrode surfaces and applying a voltage or current to determine response characteristics, while correcting for determination conditions such as temperature, humidity, and SOC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage adjustment is performed before impedance determination, then the battery can be brought to a desired state for measurement, but the electrode distance varies due to expansion and contraction, causing unstable results
Solution Approach 1:
The patent applies preliminary pressurization to the battery before performing voltage adjustment and impedance determination. This preliminary action maintains constant electrode distance throughout the measurement process, preventing the instability caused by electrode expansion and contraction during charging/d discharging operations.
Solution Approach 2:
The patent changes the physical state of the battery by applying external pressure, transforming it from a normal state to a pressurized state with fixed electrode spacing. This parameter change (applying pressure) resolves the contradiction by maintaining geometric stability while allowing electrical measurements to proceed.
2Ease of operation
If rest time is arbitrarily set before impedance determination, then the measurement can be performed at convenience, but the results vary due to inconsistent battery state history
Solution Approach 1:
The patent applies preliminary pressurization to standardize the battery state before measurement. This creates a consistent starting condition that eliminates variability from different rest times, allowing measurements to be performed conveniently while maintaining reliable and reproducible results through standardized preparation.
3Adaptability or versatility
If temperature and humidity conditions vary during measurement, then the measurement process remains flexible, but the response characteristics become unstable
Solution Approach 1:
The patent introduces pressure as a controlling parameter to fix the electrode geometry, thereby stabilizing the electrical response characteristics. This allows temperature and humidity to vary without affecting measurement precision, as the primary source of variability (electrode distance changes) has been controlled through pressure application.
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 ensures stable and reproducible determination of battery response characteristics, enabling precise evaluation and comparison of batteries.
Implementation Method 1
pressurizing the battery in a direction to reduce a distance between electrode surfaces of the battery
Data Source
AI summary
A method for determining response characteristics of a battery includes: pressurizing the battery in a direction to reduce a distance between electrode surfaces of the battery; and applying a voltage or a current to the pressurized battery to determine response characteristics of the battery.