Optical Fiber Temperature Sensing Between Battery Modules
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Solution Overview
Problem
Existing energy storage devices with battery modules face challenges in temperature measurement, as internal sensors can be difficult to inspect and replace, and they cannot measure temperatures between or outside modules, leading to inadequate heat management.
Innovation Solution
A temperature measurement device using an optical fiber cable with spaced sensing spots and cable fixing units, allowing for temperature sensing between and outside power device modules, with a controller to visualize and output temperature information for easy identification of high and low-temperature sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is disposed inside the battery module for measuring temperature, then the temperature measurement of the battery module is possible, but the temperature measurement between adjacent battery modules is not possible and the sensor is difficult to inspect and replace
Solution Approach 1:
The temperature sensing function is extracted from individual battery modules and consolidated into a centralized optical fiber cable system that runs through the rack. The optical fiber cable is routed through cable fixing units positioned between battery modules, allowing temperature sensing in inter-module spaces while maintaining easy accessibility for inspection and replacement at the cable ends located outside the modules.
2Measurement precision
If a temperature sensor is disposed inside the battery module, then the battery module temperature can be measured, but the temperature management of the entire rack cannot be achieved when the sensor is broken
Solution Approach 1:
The optical fiber cable system serves multiple functions simultaneously: it measures temperature within battery modules through inner sections, measures temperature between adjacent modules through outer sections, and provides redundant measurement paths. This multi-functional design ensures that temperature management reliability is maintained even if part of the system fails.
Solution Approach 2:
The optical fiber cable is nested within cable fixing units that are positioned between battery modules. The cable fixing units provide structural support and routing for the optical fiber cable, creating a nested arrangement where the sensing element is protected and organized within a supporting framework, enabling both intra-module and inter-module temperature monitoring.
3Measurement precision
If multiple temperature sensors are installed in each battery module for comprehensive temperature monitoring, then the temperature measurement coverage is improved, but the device complexity and difficulty of maintenance increase
Solution Approach 1:
Multiple temperature sensing functions are merged into a single optical fiber cable system. Instead of installing separate temperature sensors in each battery module, the optical fiber cable with its distributed sensing spots along the inner and outer sections provides comprehensive temperature coverage across all modules and inter-module spaces through a unified, simplified structure.
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 temperature sensing around power device modules and within the energy storage device, facilitating inspection and replacement, while clearly distinguishing between internal and external temperatures, ensuring reliable and intuitive heat management.
Implementation Method 1
an optical fiber cable including a plurality of sensing spots for sensing temperatures
Data Source
AI summary
A temperature measurement device according to an embodiment of the present invention may be provided in an energy storage device having a plurality of power device modules. The temperature measurement device may comprise a plurality of sensing spots for temperature sensing, wherein the plurality of sensing spots may include: optical fiber cables spaced a regular unit distance apart from each other; and a plurality cable fixing units disposed between the plurality of power device modules to fix the optical fiber cables. The optical fiber cables may comprise: a plurality of inner sections which are placed between the plurality of power device modules and fixed to the cable fixing units; and at least one outer section which connects the plurality of inner sections in series to each other and has a larger length than the unit distance.