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Lithium ion battery fire extinguishing method and system based on image recognition

A lithium-ion battery, image recognition technology, applied in fire rescue and other directions, can solve the problems of too simple, inability to accurately fire the energy storage system, etc., to improve the efficiency of use, high utilization of fire extinguishing agents, and achieve the effect of intelligent and precise control

Active Publication Date: 2022-08-09
CHINA ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a lithium-ion battery fire extinguishing method, device and system based on image recognition, so as to solve the technical problem that the existing conventional fire prevention methods are too simple and cannot accurately and precisely fire the energy storage system

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  • Lithium ion battery fire extinguishing method and system based on image recognition
  • Lithium ion battery fire extinguishing method and system based on image recognition
  • Lithium ion battery fire extinguishing method and system based on image recognition

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Embodiment approach

[0092] The present invention provides a fire intensity prediction method:

[0093] When a fire occurs, use the arranged temperature detectors and smoke detectors to determine whether a fire has occurred, according to the value of the temperature and temperature rise rate of the energy storage module, and the smoke detector network to obtain the early warning trigger signal of the smoke detector. The occurrence criterion is:

[0094]

[0095] Among them, P is the criterion parameter for fire occurrence; λ1 is the temperature rise rate weight factor, which ranges from 0.02 to 0.2; T is the temperature of the energy storage module; λ2 is the temperature difference weight factor, which ranges from 0.04 to 0.1; Signal weight factor, ranging from 5 to 10; F is the smoke trigger factor, F=1 when it is triggered, and F=0 when it is not triggered. When the P value reaches the critical value, it indicates that the fire is triggered, and the fire fighting system is activated. The cri...

Embodiment 1

[0121] see figure 1 and figure 2 As shown, the present invention provides a lithium-ion battery fire extinguishing system based on image recognition, comprising: a fire extinguishing agent cylinder 1, a pressure reducing valve 2, a flow control gauge 3, a digital pressure gauge, a temperature detector 4, and a smoke detector 5. High-speed camera 6, injection pipeline 7, automatic multi-directional composite nozzle 8 and intelligent control terminal 9.

[0122] In order to achieve the fire extinguishing function, the system is preferably a gas fire extinguishing agent. In this system, the fire extinguishing agent cylinder 1 is used to store the gas fire extinguishing agent, and the cylinder is equipped with a pressure reducing valve 2 and a flow control meter 3. By connecting the pressure reducing valve 2 and the flow control meter 3, the safety and controllability of the fire extinguishing agent injection process is ensured. The volume of the fire extinguishing agent cylind...

Embodiment 2

[0128] see Figure 4 As shown, the present invention provides an image recognition-based fire extinguishing method for lithium ion batteries, comprising the following steps:

[0129] S1, obtain the data collected in real time by the temperature detector 4 and the smoke detector 5; judge whether a fire has occurred according to the obtained data collected in real time by the temperature detector 4 and the smoke detector 5; if so, go to step S2, otherwise no Action, continue to obtain the real-time data collected by the temperature detector 4 and the smoke detector 5;

[0130] The criteria for fire occurrence are:

[0131]

[0132] Among them, P is the criterion parameter for fire occurrence; λ1 is the temperature rise rate weight factor, which ranges from 0.02 to 0.2; T is the temperature of the energy storage module; λ2 is the temperature difference weight factor, which ranges from 0.04 to 0.1; Signal weight factor, ranging from 5 to 10; F is the smoke trigger factor, F=1...

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Abstract

The invention belongs to the technical field of battery energy storage safety, and discloses a lithium ion battery fire extinguishing method, device and system based on image recognition, and the method comprises the steps: S1, obtaining data collected by a temperature detector and a smoke detector in real time; judging whether a fire disaster occurs or not according to the acquired data acquired by the temperature sensing detector and the smoke sensing detector in real time; if yes, entering the step S2, and if not, continuing to acquire data acquired by the temperature detector and the smoke detector in real time; s2, starting a high-speed camera to continuously shoot battery module images; calculating a fire ignition point position, a flame area and fire intensity, and calculating a fire extinguishing agent injection amount in real time; and S3, controlling the direction change of the full-automatic multi-direction composite nozzle, aligning to the position of the fire ignition point, and spraying the fire extinguishing agent according to the fire extinguishing agent spraying flow Q. The technical problems that an existing conventional fire fighting means cannot control the fire extinguishing agent injection amount in real time, and accurate fire fighting cannot be conducted on an energy storage system can be solved.

Description

technical field [0001] The invention belongs to the safety field of battery energy storage systems, and in particular relates to a method, device and system for fire extinguishing of lithium ion batteries based on image recognition. Background technique [0002] At present, the cumulative installed capacity of electrochemical energy storage in China is steadily increasing. By 2020, the installed capacity of electrochemical energy storage will exceed 2000MW, with a compound annual growth rate of nearly 70%. The current commonly used electrochemical energy storage systems, such as lithium-ion battery energy storage systems, have potential safety hazards and cannot essentially guarantee the safety of use. The research shows that the thermal runaway combustion fire of the energy storage battery has a characteristic change in stages, that is, it goes through the process of slow combustion → jet fire → slow combustion and the flame gradually extinguishes. For example, the fire pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62C3/16A62C31/03A62C37/40
CPCA62C3/16A62C31/03A62C37/40Y02E60/10
Inventor 杨凯陈浩张明杰刘皓
Owner CHINA ELECTRIC POWER RES INST
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