Battery Cell Electrolyte Sensor for Real-Time Separator Measurement
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Solution Overview
Problem
Existing methods for measuring electrolyte concentration in lithium secondary batteries are unable to directly measure the concentration between the electrode and separator, and they lack real-time measurement capabilities, leading to inaccurate and delayed assessments of battery performance and deterioration.
Innovation Solution
A battery cell with a measuring unit comprising a first electrode plate, an insulating film, and a second electrode plate sequentially stacked, which is inserted between the separator and the electrode to directly measure electrolyte concentration, allowing for real-time monitoring through resistance measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a rod-shaped conductive metal rod is used to measure electrolyte concentration, then the measurement can be performed, but the measurement is indirect and cannot directly measure the concentration between the electrode and separator
Solution Approach 1:
The patent extracts the measurement function from a separate external device and integrates it directly into the battery cell structure. The measuring unit with first and second electrode plates is embedded within the battery cell, allowing direct measurement of electrolyte concentration between the electrode and separator without requiring external immersion methods.
Solution Approach 2:
The measuring unit is nested within the battery cell structure. The first electrode plate, insulating film, and second electrode plate are stacked and inserted between the separator and electrode, creating a nested configuration that enables direct measurement within the confined space of the battery cell.
2Productivity
If conventional measurement methods are used, then the measurement process is simple, but real-time measurement capability is lacking
Solution Approach 1:
The measuring unit enables continuous real-time measurement of electrolyte concentration during battery operation. The resistance value between the first and second electrode plates can be continuously monitored, providing ongoing data on electrolyte concentration changes without interrupting battery function.
3Measurement precision
If the measuring unit is inserted between separator and electrode, then direct measurement is enabled, but the device structure becomes more complex
Solution Approach 1:
The patent uses a thin insulating film between the first and second electrode plates, allowing the measuring unit to be compact and flexible enough to fit within the battery cell structure. This thin film design minimizes the space required while maintaining the necessary electrical insulation for accurate measurement.
4Reliability
If indirect measurement methods are used, then manufacturing is simpler, but measurement accuracy and reliability are reduced
Solution Approach 1:
The measuring unit merges the measurement function with the battery cell structure itself. The first and second electrode plates are integrated into the battery assembly, combining the measurement system with the existing battery components rather than adding a separate external measurement device.
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 solution enables accurate, real-time measurement of electrolyte concentration between the electrode and separator, improving the assessment of battery performance and deterioration, and simplifying the manufacturing process while ensuring high stability.
Implementation Method 1
an insulating film which absorbs the electrolyte between the positive electrode or the negative electrode and the separator
Implementation Method 2
the resistance value between the first electrode plate and the second electrode plate is measured, and it is determined whether the concentration of the electrolyte
Data Source
AI summary
The present invention relates to a battery cell including an electrolyte ion concentration measurement unit and a method for measuring an electrolyte concentration using same. The battery cell according to the present invention comprises a measurement unit in which a first electrode plate, an insulation film, and a second electrode plate are sequentially stacked on one another, wherein the measurement unit is inserted between a separator of the battery cell and an electrode thereof, and thus can directly measure an electrolyte concentration between the separator and the electrode. Therefore, the battery cell can be simply manufactured and has excellent stability. In addition, according to the present invention, the method for measuring an electrolyte concentration of a secondary battery using the battery cell enables measurement of electrolyte concentration in real time even during the use of the battery and can measure an electrolyte concentration of the separator more accurately and quickly than a conventional technology.