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Method and device for controlling filling amount and effective amount of fire extinguishing agent of lithium battery fire extinguishing system

A technology of a fire extinguishing system and a control method, which is applied in the safety field of battery energy storage systems, and can solve problems such as burning containers, energy storage power stations being paralyzed, and systemic fires easily formed, so as to avoid excessive losses, improve high-efficiency utilization, and reduce fire extinguishing costs Effect

Active Publication Date: 2022-06-03
CHINA ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, judging from the current application effect, there is a prominent problem in the containerized energy storage system, that is, if a certain / certain battery inside the containerized energy storage system has a safety problem, it is very easy to cause a systematic fire and burn the entire battery. container
[0003] The fire accident of the containerized energy storage system not only caused huge economic losses, paralyzed the entire energy storage power station, but also had an extremely adverse negative impact on the development of the industry
However, the fire extinguishing technology currently applied to fire accidents in containerized energy storage systems is to use fire extinguishing warning systems to control gas cylinders or pipe network fire extinguishing devices. , the fire extinguishing medium cannot be fully sprayed out within the specified injection time, which makes the amount of conventional fire extinguishing agent always greater than the effective amount. In order to ensure a high fire extinguishing success rate, a large amount of fire extinguishing medium overflows the energy storage system without function

Method used

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  • Method and device for controlling filling amount and effective amount of fire extinguishing agent of lithium battery fire extinguishing system
  • Method and device for controlling filling amount and effective amount of fire extinguishing agent of lithium battery fire extinguishing system
  • Method and device for controlling filling amount and effective amount of fire extinguishing agent of lithium battery fire extinguishing system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] see figure 1 As shown, the present invention provides a method for controlling the filling amount of fire extinguishing agent in a lithium battery fire extinguishing system, comprising the following steps:

[0065] S1. Determine the effective amount of fire extinguishing agent:

[0066] S11. Calculate the heat release rate of a single lithium-ion battery during thermal runaway by a cone calorimeter and integrate it to obtain the heat release q of a single lithium-ion battery, and multiply the heat release q of a single lithium-ion battery by the lithium battery system The total number of batteries in the lithium battery system obtains the total heat release Q.

[0067] S12. According to the design standard of GB50370 of "Code for Design of Gas Fire Extinguishing System", the design concentration of heptafluoropropane for fire extinguishing should be 8%-10%; in the present invention, 9% is used, and the actual consumption M of the fire extinguishing agent of the lithium...

Embodiment 2

[0100] see figure 2 As shown, the present invention also provides a control device for the filling amount of fire extinguishing agent in a lithium battery fire extinguishing system, including:

[0101] The first determination module is used to determine the effective amount M of the fire extinguishing agent required by the lithium battery system;

[0102] The second determination module is used to determine the minimum charge M of the lithium battery fire extinguishing agent according to the parameters of the fire extinguishing gas cylinder and the effective amount M c1 ;

[0103] refillable module, with minimum refill quantity M as stated c1 Fill fire extinguishing gas cylinders.

[0104] In the specific implementation of the present invention, the step of the first determination module determining the effective amount M of the fire extinguishing agent required by the lithium battery system specifically includes:

[0105] The heat release rate of the single lithium-ion b...

Embodiment 3

[0122] see image 3 As shown, the present invention provides a method for controlling the effective amount of fire extinguishing agent in a lithium battery fire extinguishing system, comprising the following steps:

[0123] S100, using the method for controlling the fire extinguishing agent filling amount of the lithium battery fire extinguishing system described in Embodiment 1 according to the minimum charging amount M c1 Filling fire extinguishing gas cylinders;

[0124] S200. Detect the number X of batteries that have thermal runaway in the lithium battery system through the detection system, and calculate the mass M of the fire extinguishing agent required for fire extinguishing 3 =X*q;

[0125] S300. Calculate the injection rate v in real time by monitoring the data of the pressure sensor of the fire extinguishing gas cylinder during the fire extinguishing process, and calculate the actual injected fire extinguishing agent mass M by the injection rate v r1 ; When the ...

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Abstract

The invention belongs to the field of battery energy storage system safety, and discloses a fire extinguishing agent filling amount and effective amount control method for a lithium battery fire extinguishing system. The determination method comprises the following steps: determining the effective dosage M of a fire extinguishing agent required by the lithium battery system; determining the minimum filling amount Mc1 of the lithium battery fire extinguishing agent according to the parameters of the fire extinguishing gas cylinder and the effective use amount M; and filling of the fire extinguishing gas cylinder is controlled according to the minimum filling amount Mc1. On the premise that effective fire extinguishing is guaranteed, fire extinguishing and cooling are conducted on the battery, large-scale fire disasters are prevented, and the technical problem that the loss of a fire extinguishing medium is too large is solved.

Description

technical field [0001] The invention belongs to the safety field of a battery energy storage system, and in particular relates to a method and a device for controlling the filling amount and effective amount of a fire extinguishing agent in a lithium battery fire extinguishing system. Background technique [0002] Among many energy storage technologies, electrochemical energy storage is an important development direction of large-scale energy storage technology due to its advantages of short response time, high energy density, low maintenance cost, flexibility and convenience. The expansion of the installed capacity of energy storage and the continuous rapid growth of energy storage projects indicate that the commercial operation of lithium-ion battery energy storage has become clear, and the energy storage market has released positive signals. Energy storage will increasingly participate in the power market and play a more important role in the user side, grid side and anci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62C3/16A62C31/00
CPCA62C3/16A62C31/00Y02E60/10
Inventor 杨凯张明杰刘皓陈浩渠展展
Owner CHINA ELECTRIC POWER RES INST