Bipolar Collector Foil Temperature Detection via Potential Difference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric storage devices face complexity in temperature measurement, which affects power generation efficiency and safety, due to intricate structures requiring heat-conducting members or thermocouples for temperature detection.
Innovation Solution
An electric storage device with a bipolar configuration using laminated metal plates of different metals, where the potential difference between these plates is measured to detect temperature and abnormalities, allowing for internal temperature monitoring without inserting temperature-measuring devices, thus simplifying the structure and preventing interference with chemical reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If heat-conducting members or thermocouples are inserted into battery cells for temperature measurement, then temperature detection capability is improved, but device structure becomes complicated and interference with chemical reactions occurs
Solution Approach 1:
The battery cell itself serves as the temperature sensor by utilizing its own electrochemical potential difference in response to temperature changes. The open circuit voltage between the positive and negative electrodes changes predictably with temperature, allowing the battery to self-diagnose its temperature without external sensing components.
Solution Approach 2:
The patent replaces mechanical/physical temperature sensing devices (thermocouples, heat-conducting members) with an electrochemical measurement system. By measuring the open circuit voltage, which has a known temperature coefficient, the system substitutes direct thermal measurement with electrical measurement that indirectly indicates temperature.
2Measurement precision
If heat-conducting members are inserted into battery cells for temperature measurement, then temperature detection capability is improved, but the measurement structure becomes complicated
Solution Approach 1:
The battery cell itself serves as the temperature sensor by utilizing its own electrochemical potential difference in response to temperature changes. The open circuit voltage between the positive and negative electrodes changes predictably with temperature, allowing the battery to self-diagnose its temperature without external sensing components.
3Measurement precision
If thermocouples are wrapped around stacked electrode bodies for temperature measurement, then internal temperature can be measured, but the measurement structure becomes complicated
Solution Approach 1:
The battery cell itself serves as the temperature sensor by utilizing its own electrochemical potential difference in response to temperature changes. The open circuit voltage between the positive and negative electrodes changes predictably with temperature, allowing the battery to self-diagnose its temperature without external sensing components.
Solution Approach 2:
The patent extracts the temperature measurement function from separate external components and integrates it into the inherent electrochemical properties of the battery cell itself. By removing the need for thermocouples and heat-conducting members, the solution simplifies the overall device structure while maintaining measurement capability.
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 effective detection of temperature and abnormalities within the device, improving power generation efficiency and safety by simplifying the measurement process and avoiding interference with battery cell reactions.
Implementation Method 1
a potential difference measuring means for measuring a potential difference between the first and second metal plates
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
An electric storage device is provided with a battery cell (25), a collector foil (29) having a first metal plate (11) and a second metal plate (12) laminated together, and a voltmeter (13) for measuring potential difference between the first metal plate (11) and the second metal plate (12). The first metal plate (11) and the second metal plate (12) are formed of mutually different metals. The collector foil (29) is arranged to be in contact with the battery cell (25).