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A safety control system for energy storage device based on optical fiber temperature measurement

An optical fiber temperature measurement and safety control technology, which is applied to measurement devices, thermometers, and measurement electronics, and can solve problems such as monitoring, limited sampling chip channels, and inability to achieve battery temperature, ensuring safe operation and avoiding thermal runaway. effect of risk

Active Publication Date: 2021-03-19
BEIJING JINMAO GREEN BUILDING TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the NTC thermistor method commonly used in the industry to collect battery temperature is limited by the number of channels of the sampling chip, and it is impossible to monitor the temperature of each battery in multiple directions, and the method of over-temperature protection of the battery only depends on judging the battery. The protection action is taken after the over-temperature threshold, which cannot monitor the health status of each battery in the system and predict the thermal runaway of the battery
[0006] The existing technology lacks the battery in the energy storage system to achieve accurate detection, early warning and efficient system

Method used

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  • A safety control system for energy storage device based on optical fiber temperature measurement
  • A safety control system for energy storage device based on optical fiber temperature measurement
  • A safety control system for energy storage device based on optical fiber temperature measurement

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Embodiment 1

[0039] A safety control system for a lithium battery energy storage device based on optical fiber temperature measurement, which includes an optical fiber temperature measurement device and a safety control device. Optical fiber temperature measurement device: The optical fiber temperature measurement device uses optical fiber as the temperature sensing element and signal transmission medium, and makes a series of temperature sensitive areas—Bragg gratings on ordinary single-mode optical fibers. These sensitive areas can accurately and sensitively detect the surrounding temperature. Subtle changes, the other parts of the fiber are only used for signal transmission and are not sensitive to environmental interference, thus ensuring high sensitivity and low error rate of the entire fiber grating temperature detection.

[0040]The optical fiber temperature measurement device uses the Bragg grating of the optical fiber as the sensing element, and combines laser, optical fiber and op...

Embodiment 2

[0083] A safety control system for a lithium battery energy storage device based on optical fiber temperature measurement, which includes an optical fiber temperature measurement device and a safety control device. Optical fiber temperature measurement device: The optical fiber temperature measurement device uses optical fiber as the temperature sensing element and signal transmission medium, and makes a series of temperature sensitive areas—Bragg gratings on ordinary single-mode optical fibers. These sensitive areas can accurately and sensitively detect the surrounding temperature. Subtle changes, the other parts of the fiber are only used for signal transmission and are not sensitive to environmental interference, thus ensuring high sensitivity and low error rate of the entire fiber grating temperature detection.

[0084] The optical fiber temperature measurement device uses the Bragg grating of the optical fiber as the sensing element, and combines laser, optical fiber and o...

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Abstract

The invention discloses a safety control system for an energy storage device based on optical fiber temperature measurement, which monitors the temperature of each battery in a lithium battery energy storage device in real time through the optical fiber temperature measurement technology to judge the thermal stability of the battery and record the entire service life of the battery The temperature curve, combined with the battery voltage safety state algorithm to analyze the health of the battery, so as to ensure the safe operation of the lithium battery energy storage system and avoid the risk of thermal runaway of the battery.

Description

technical field [0001] The invention relates to a safety control system, in particular to a safety control system of a lithium battery energy storage device based on optical fiber temperature measurement. Background technique [0002] According to CNESA data, as of the end of 2018, the cumulative installed capacity of electrochemical energy storage projects in operation in my country reached 1.1GW, of which the installed capacity of new electrochemical energy storage projects in operation was 682.9MW, a year-on-year increase of 464.4%. In South Korea, the installed capacity is also rising. Generally speaking, it is relatively rare for energy storage systems to have problems in my country, but recently, fires and combustion incidents of energy storage systems have occurred in succession in many places. For energy storage systems, battery safety has always been the most critical issue in the development of this industry. For the application environment of user-side energy stor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/48G01R31/392G01R31/3835G01K11/3206
CPCH01M10/486G01R31/392G01R31/3835G01K11/3206Y02E60/10
Inventor 袁志刚庄明照张超方振雷李威
Owner BEIJING JINMAO GREEN BUILDING TECH CO LTD
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