Multi-Parameter Sensing Film for Battery Temperature and Pressure Mapping
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Solution Overview
Problem
Existing methods for monitoring operating parameters of electrical devices, such as battery modules, are inefficient due to the need for multiple temperature sensors and the inability to detect critical parameters like pressure, which can indicate cell swelling.
Innovation Solution
A multi-parameter sensing film is used, comprising a substrate with sensing elements made of responsive materials that change electrical resistance with temperature and pressure changes. Monitoring circuits at predefined positions detect these changes, allowing for the determination of temperature and pressure distributions across the device surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple temperature sensors are placed at different locations in the battery module, then comprehensive temperature information is obtained, but cost and space consumption increase
Solution Approach 1:
The sensing film integrates multiple sensing functions (temperature and pressure detection) into a single device. The film contains first sensing elements made of temperature-responsive material and second sensing elements made of pressure-responsive material, allowing one device to perform multiple measurement functions that previously required separate sensors
Solution Approach 2:
The patent combines multiple sensing functions into a single integrated sensing film. The film merges temperature sensing elements and pressure sensing elements into one unified structure that can simultaneously detect both parameters across multiple locations, eliminating the need for separate temperature sensors and pressure sensors
2Adaptability or versatility
If traditional temperature sensors are used, then temperature monitoring is achieved, but pressure detection capability is lost
Solution Approach 1:
The sensing film integrates multiple sensing functions (temperature and pressure detection) into a single device. The film contains first sensing elements made of temperature-responsive material and second sensing elements made of pressure-responsive material, allowing one device to perform multiple measurement functions that previously required separate sensors
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 provides comprehensive information on the health state of electrical devices, reduces the need for multiple sensors, and identifies localized issues like hotspots or pressure spikes, enhancing safety and performance.
Implementation Method 1
the one or more sensing elements are formed by at least one responsive material which is configured to exhibit changes in electrical resistance in response to changes in the operating parameters
Data Source
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Figure 3a~3b
AI summary
The present disclosure relates to a computer-implemented method of determining one or more operating parameters of an electrical device comprising by means of a multi-parameter sensing film (200, 300). It also relates to a battery module and a battery system comprising the sensing film. The sensing film comprises: - a substrate (201,301), - one or more sensing elements (210, 310a-310d) arranged on said substrate, wherein said one or more sensing elements are formed by at least one responsive material which is configured to exhibit changes in electrical resistance in response to changes in said operating parameters, - a plurality of monitoring circuits (204a-204d, 304a-304d) arranged at predefined monitoring positions (202a-204d, 302a-302d) that are spaced apart from each other over said substrate, said monitoring circuits being configured to monitor the electrical resistance of said at least one responsive material at monitoring positions, the method comprising: - detecting (S1) electrical resistances of said at least one responsive material at monitoring positions, and - determining (S2) the one or more operating parameters at said monitoring positions by using information of the detected electrical resistances.