阅读说明：本技术 一种自动锂电池灭火系统 (Automatic lithium battery fire extinguishing system ) 是由 钟允晖 金法泉 罗俊 吴浩 许夏 于 2019-09-10 设计创作，主要内容包括：本发明公开了一种自动锂电池灭火系统,其特征在于：包括火灾预警系统、和火灾预警系统连接的电池管理系统、和电池管理系统连接的电池模组、和火灾预警系统连接的灭火装置,所述灭火装置包括灭火剂瓶组、设于火灾预警管理系统和灭火剂瓶组连接线上的电磁阀和电磁驱动装置、分配阀、局部释放管路和末端的局部喷嘴。增加了对防护区快速全淹没防护,实现快速灭火,整体防护的功能；实现小范围内多次启动灭火,抑制锂电池火灾,同时避免了传统大范围内大量喷放灭火剂,对其他电池模组造成污染；增加了机械应急启动,人员可以在发现火灾时,通过应急操作启动灭火系统；增设BMS信号采集与处理,提高火灾预紧能力,增加火灾预警响应速度。(The invention discloses an automatic lithium battery fire extinguishing system, which is characterized in that: the fire extinguishing device comprises a fire early warning system, a battery management system connected with the fire early warning system, a battery module connected with the battery management system, and a fire extinguishing device connected with the fire early warning system, wherein the fire extinguishing device comprises a fire extinguishing agent bottle group, an electromagnetic valve and an electromagnetic driving device which are arranged on a connecting line of the fire early warning management system and the fire extinguishing agent bottle group, a distribution valve, a local release pipeline and a terminal local nozzle. The rapid total flooding protection of a protection area is added, and the functions of rapid fire extinguishing and integral protection are realized; the fire extinguishing device has the advantages that multiple starting and fire extinguishing in a small range are realized, the fire of the lithium battery is restrained, and meanwhile, the pollution to other battery modules caused by the large amount of fire extinguishing agent sprayed in the traditional large range is avoided; mechanical emergency starting is added, and personnel can start the fire extinguishing system through emergency operation when finding a fire; BMS signal acquisition and processing are additionally arranged, so that the fire pre-tightening capability is improved, and the fire early warning response speed is increased.)

1. An automatic lithium cell fire extinguishing systems which characterized in that: including conflagration early warning system (5), the battery management system who is connected with conflagration early warning system, the battery module who is connected with battery management system, the extinguishing device who is connected with conflagration early warning system, extinguishing device includes fire extinguishing agent bottle group, locates solenoid valve and electromagnetic drive device, distribution valve (42), local release pipeline and terminal local nozzle on conflagration early warning management system and the connecting wire of fire extinguishing agent bottle group.

2. An automatic lithium battery fire extinguishing system according to claim 1, characterized in that: be provided with fire extinguishing material in the fire extinguishing agent bottle group, temperature signal in Battery Management System (BMS) (6) is gathered in real time in conflagration early warning system (5), when temperature signal reaches battery module (2) out of control condition, early warning system (5) send start instruction, open solenoid valve (47), electromagnetic drive device (45), the fire extinguishing agent in fire extinguishing agent bottle group (41) this moment flows to local release pipeline (46) from distributing valve (42) under the effect of self pressure, and spout from local nozzle (54), realize quick point-to-point putting out a fire.

3. An automatic lithium battery fire extinguishing system according to claim 1, characterized in that: be equipped with fire detector (3) on the conflagration early warning device, fire detector (3) detect fire signal, with feedback signal transmission to early warning control system (5), early warning control system sends start-up instruction, open second solenoid valve (49), electromagnetic drive device (45), the fire extinguishing agent in bottle group (41) flows to flooding release line (48) entirely from distributing valve (42) under the effect of self pressure this moment, and spout from flooding nozzle (56) entirely, realize flooding the protection entirely.

4. An automatic lithium battery fire extinguishing system according to claim 1, characterized in that: the fire extinguishing agent bottle group is characterized in that a container valve (43), a balance pipe connected with the container valve, a fire detecting pipe connected to the balance pipe and a mechanical emergency starting device connected to the tail end of the fire detecting pipe are arranged above the fire extinguishing agent bottle group, the fire detecting pipe (53) is a hose capable of generating a break (55) when reaching a set temperature, one end of the fire detecting pipe is arranged along the periphery of the module (2), the mechanical emergency starting device (52) is arranged at the tail end of the fire detecting pipe, a one-way valve (50) is arranged at the other end of the fire detecting pipe and connected with the balance pipe (45), when the fire detecting pipe (53) reaches a specified temperature and generates a break (54), pressure in the fire detecting pipe (53) is relieved from the break, and therefore the original balance state of the container valve (43) is broken.

5. An automatic lithium battery fire extinguishing system according to claim 4, characterized in that: the mechanical emergency starting device (52) can manually discharge air pressure in the fire detecting pipe (53), and a leakage detecting device (51) is arranged on the mechanical emergency starting device (52). The leak detection device (51) has a signal output function, and when the air pressure in the fire detection pipe (53) is reduced to a set value, a signal can be transmitted to the early warning control system (5), so that the operation of the whole set of fire extinguishing facility is controlled conveniently.

6. an automatic lithium battery fire extinguishing system according to claim 3, characterized in that: second solenoid valve (49) are normally open solenoid valve, and when BMS system (6), early warning control system (5) operation broke down, extinguishing device adopted the temperature sensing to start promptly or mechanical emergency starts, and the fire extinguishing agent flows through distributing valve (42) to submerging entirely release pipeline (48) from bottle group (41), spouts from submerging entirely nozzle (56), realizes that lithium cell container energy storage system wholly protects.

7. An automatic lithium battery fire extinguishing system according to claim 4, characterized in that: the container valve (43) of the fire extinguishing device can realize the start-stop control of the fire extinguishing device by controlling the start-stop of the electromagnetic valve (45).

8. An automatic lithium battery fire extinguishing system according to claim 4, characterized in that: the fire extinguishing device is characterized in that a check valve (50) is arranged between the balance pipe (44) and the fire detecting pipe (53), when air leaks in the fire detecting pipe (53), the air in the balance pipe (44) can be supplemented to the fire detecting pipe in time, the fire extinguishing device can be started by discharging the air in the fire detecting pipe (53), the air in the fire detecting pipe (53) cannot reversely enter the air in the balance pipe (44), the pressure in a balance cavity of the container valve can be quickly discharged when the container valve (43) is started by adopting the electromagnetic driving device (45), and the electric control starting response speed of the fire extinguishing device is improved.

Technical Field

The invention relates to the technical field of lithium battery fire extinguishment, and relates to an automatic lithium battery fire extinguishing system.

background

In recent years, with the advantages of high energy density, high output power, long charging and discharging life and the like of lithium batteries, the lithium batteries are widely applied to the fields of traffic power, electric power energy storage, mobile communication and the like, and are developed as part of new energy strategic industries in China. However, with the deep application of lithium batteries in engineering, the fire safety problem is increasingly prominent, and since lithium batteries are energetic substances, especially when the lithium batteries are overheated, short-circuited, extruded and the like, a large amount of heat is generated to initiate chain reaction of internal electrode materials and electrolyte, so that thermal runaway occurs and large-scale fire and explosion accidents are developed.

At present, to lithium battery energy storage system's fire control safety design, lack the characteristic to the lithium battery conflagration to carry out the analysis, lack the overall arrangement characteristic of fire extinguishing systems design and energy storage system and combine together, mostly still adopted traditional electric fire to design, adopt cabinet type gas extinguishing device and direct type to visit firetube extinguishing device. Through engineering application investigation and fire extinguishing test analysis, the existing device is found to have the following obvious defects: the cabinet type fire extinguishing device is basically arranged at the door opening corner of the container on site, and aiming at the long and narrow occasions of energy storage of the lithium battery container, if the width of the 40-foot energy storage container is 2.4 meters, the length of the container is 12 meters, the length of the container is seriously beyond the protection radius of the cabinet type fire extinguishing device, a protection dead angle exists, and a gas fire extinguishing agent sprayed by the cabinet type fire extinguishing device is not easy to reach a pack box in time during fire extinguishing, so that the fire is not easy to control in the; direct fire detection tube extinguishing device, through many times of experimental tests, it can reach extinguishing agent concentration of putting out a fire fast in local minizone, and fire control effect is good, but because of the influence of its arrangement of release pipe, pipe diameter etc. can not be fine carry out all-round protection to whole energy storage cabinet, and fire detection tube often needs the conflagration to last 3 ~ 5 seconds the breach just can appear, and response speed is slower, but lithium cell conflagration spreads rapidly, very easily causes large tracts of land conflagration, therefore is unfavorable for whole fire protection.

The invention aims at the fire hazard characteristic of a lithium battery energy storage system, develops a fire extinguishing system for automatically and repeatedly extinguishing a lithium battery fire hazard, and is urgently needed in the field of the current market.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an automatic lithium battery fire extinguishing system, which effectively improves the fire extinguishing efficiency and the disaster response speed, improves the fire protection function, and quickly and efficiently prevents and treats fire.

The following technical scheme is provided for solving the problem: an automatic lithium cell fire extinguishing systems which characterized in that: the fire extinguishing device comprises a fire early warning system, a battery management system connected with the fire early warning system, a battery module connected with the battery management system, and a fire extinguishing device connected with the fire early warning system, wherein the fire extinguishing device comprises a fire extinguishing agent bottle group, an electromagnetic valve and an electromagnetic driving device which are arranged on a connecting line of the fire early warning management system and the fire extinguishing agent bottle group, a distribution valve, a local release pipeline and a terminal local nozzle.

As an improvement, be provided with fire extinguishing material in the fire extinguishing agent bottle group, the temperature signal among the real-time Battery Management System (BMS) of gathering of fire early warning system, when temperature signal reached battery module out of control condition, the early warning system sent start-up command, opened solenoid valve, electromagnetic drive device, the fire extinguishing agent in the fire extinguishing agent bottle group at this moment flows into local release pipeline from the distributing valve under the effect of self pressure to spout from local nozzle, realize quick point-to-point putting out a fire.

As an improvement, a fire detector is arranged on the fire early warning device, the fire detector detects a fire signal and transmits a feedback signal to an early warning control system, the early warning control system sends a starting instruction, the second electromagnetic valve and the electromagnetic driving device are opened, and at the moment, the fire extinguishing agent in the bottle group flows to a total flooding release pipeline from the distribution valve under the action of self pressure and is sprayed out from a total flooding nozzle, so that total flooding protection is realized.

As an improvement, a container valve, a balance pipe connected with the container valve, a fire detection pipe connected with the balance pipe and a mechanical emergency starting device connected at the tail end of the fire detection pipe are arranged above the bottle group, and the fire detection pipe is a hose which can be broken when reaching a set temperature. One end of the fire detecting pipe is arranged along the periphery of the module, the tail end of the fire detecting pipe is provided with a mechanical emergency starting device, the other end of the fire detecting pipe is provided with a one-way valve and is connected with the balance pipe, when the fire detecting pipe reaches a specified temperature first and breaks, the pressure in the fire detecting pipe is relieved from the broken part, and therefore the original balance state of the container valve is broken and the starting device is started.

As an improvement, the mechanical emergency starting device can manually discharge the air pressure of the fire detecting tube, and a leakage detecting device is arranged on the mechanical emergency starting device. The leakage detection device has a signal output function, and when the air pressure in the fire detection pipe is reduced to a set value, the signal can be transmitted to the early warning control system, so that the operation of the whole set of fire extinguishing facility is controlled conveniently.

As an improvement, the second solenoid valve is normally open solenoid valve, and when BMS system, early warning control system operation broke down, extinguishing device adopted the temperature sensing to start in emergency or the emergent start of machinery, and the fire extinguishing agent flows through the distributing valve to submerging the release pipeline entirely from the bottle group, from submerging the nozzle entirely and spouting, realizes that lithium cell container energy storage system wholly protects.

The early warning control system can collect signals such as temperature, fire detectors, pressure signal feedback devices and the like in the BMS system, sends out corresponding starting instructions according to fire control requirements, and controls the continuous spraying time, secondary spraying and automatic closing of the fire extinguishing agent bottle group.

As an improvement, the fire extinguishing device container valve can realize the start-stop control of the fire extinguishing device by controlling the start-stop of the electromagnetic valve.

As an improvement, a one-way valve is arranged between the balance pipe and the fire detecting pipe, when air leakage exists in the fire detecting pipe, the air in the balance pipe can be supplemented to the fire detecting pipe in time, the fire extinguishing device can be started by discharging the air in the fire detecting pipe conveniently, the air in the fire detecting pipe cannot reversely enter the air in the balance pipe, when the container valve is started by adopting an electromagnetic driving device, the pressure in a container valve balance cavity can be discharged quickly, and the electric control starting response speed of the fire extinguishing device is improved.

The invention effectively realizes that: firstly, the fire extinguishing device is started by electric control, the fire extinguishing agent is sprayed quickly and locally point to point, and the response speed and the fire extinguishing capability of the fire extinguishing device are improved; the fire extinguishing device is automatically started for multiple times, so that the fire extinguishing device can be automatically started for multiple times according to the fire characteristics of the reignition of the lithium battery, and the fire can be restrained for a long time; and thirdly, controlling the fire in a large range by total flooding, and implementing a fire extinguishing system for total flooding protection when the battery fire spreads to other energy storage cabinet areas.

The inventive scheme has the advantages that:

The traditional cabinet type fire extinguishing device can only protect large-range total flooding and cannot quickly implement point-to-point protection, particularly for a lithium battery container energy storage system, a fire point is usually in a pack box body, total flooding protection is adopted, and a fire extinguishing agent cannot quickly and effectively spread into the box body to extinguish fire; the traditional fire detection tube fire extinguishing device can only realize local quick fire extinguishing in a small range of a fire ignition point of a fire, and is very easy to cause the fire to spread in a large range aiming at a lithium battery container energy storage system, and the traditional mode can not reliably control the whole fire.

After the traditional fire extinguishing device is started, a complete fire extinguishing agent is sprayed at one time, and a long-term suppression cannot be realized aiming at the fire disaster that the lithium battery module is easy to reburn.

Third, traditional extinguishing device lacks mechanical emergency operation, and when fire extinguishing control system broke down, extinguishing device can't in time start, has serious potential safety hazard. The fire extinguishing device is additionally provided with mechanical emergency starting, and personnel can start the fire extinguishing system through emergency operation when finding a fire.

The traditional fire extinguishing device adopts a gas fire extinguishing control panel as fire starting control, temperature out-of-control acquisition in a battery management system cannot be realized, action response is slow, the fire extinguishing agent allowance in a fire extinguishing agent bottle group cannot be monitored in real time, and fire condition information and fire extinguishing device action feedback cannot be transmitted to a cloud platform.

Drawings

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic structural diagram of one embodiment of the present invention;

FIG. 2 is a schematic diagram of a particular embodiment of a fire suppression system;

Fig. 3 is a schematic diagram of a fire suppression system control flow.

Detailed Description

As shown in fig. 1, 2 and 3, an automatic lithium battery fire extinguishing system, includes fire early warning system 5, the battery management system who is connected with fire early warning system, the battery module who is connected with battery management system, the extinguishing device who is connected with fire early warning system, extinguishing device includes fire extinguishing agent bottle group, locates solenoid valve and electromagnetic drive device, distribution valve, local release pipeline and terminal local nozzle on fire early warning management system and the connecting wire of fire extinguishing agent bottle group.

In this embodiment, the fire extinguishing material is arranged in the fire extinguishing agent bottle group.

The realization mode is that, the temperature signal among the Battery Management System (BMS)6 is gathered in real time to conflagration early warning system 5, and when temperature signal reached battery module 2 out of control condition, early warning system 5 sent start instruction, opened solenoid valve 47, electromagnetic drive device 45, and the fire extinguishing agent in the fire extinguishing agent bottle group 41 flowed to local release pipeline 46 from distributing valve 42 under the effect of self pressure this moment to spout from local nozzle 54, realize quick point-to-point putting out a fire.

And a fire detector 3 is arranged on the fire early warning device.

When a fire signal is detected, the feedback signal is transmitted to the early warning control system 5, the early warning control system sends out a starting instruction, the second electromagnetic valve 49 and the electromagnetic driving device 45 are opened, and at the moment, the fire extinguishing agent in the fire extinguishing agent bottle group 41 flows to the total flooding release pipeline 48 from the distribution valve 42 under the action of the self pressure and is sprayed out from the total flooding nozzle 56, so that the total flooding protection is realized.

In this embodiment, a container valve, a balance pipe connected to the container valve, a fire detecting pipe connected to the balance pipe, and a mechanical emergency starting device connected to the end of the fire detecting pipe are disposed above the fire extinguishing agent bottle set, the fire detecting pipe 53 is a flexible pipe with a break 55 when reaching a set temperature, one end of the fire detecting pipe is disposed along the periphery of the module 2, the mechanical emergency starting device 52 is disposed at the end of the fire detecting pipe, the one-way valve 50 is disposed at the other end of the fire detecting pipe and connected to the balance pipe 45, and when the fire detecting pipe 53 reaches a specified temperature first and the break 54 occurs, the pressure in the fire detecting pipe 53 is relieved from the break, so as to break the original balance state of the container valve 43 and start the device.

In this embodiment, the mechanical emergency starting device 52 may be configured to manually release the air pressure in the fire detecting tube 53, and the mechanical emergency starting device 52 is provided with the leak detection device 51. The leak detection device 51 has a signal output function, and when the air pressure in the fire detection pipe 53 is reduced to a set value, a signal can be transmitted to the early warning control system 5, so that the operation of the whole set of fire extinguishing facility is controlled conveniently.

in this embodiment, the second solenoid valve 49 is a normally open solenoid valve, and when the operation of BMS system 6, early warning control system 5 broke down, the extinguishing device adopted the temperature sensing to start in an emergency or the mechanical emergency starts, and fire extinguishing agent flowed through distribution valve 42 to the total flooding release pipeline 48 from fire extinguishing agent bottle group 41, and from the total flooding nozzle 56 spray, realized the whole protection of lithium cell container energy storage system.

In this embodiment, the early warning control system 5 can collect signals such as temperature, fire detector 3, pressure signal feedback device in the BMS system 6, and according to the fire control demand, send corresponding start instruction, and control the duration of the fire extinguishing agent bottle group, the secondary spraying time and the automatic closing.

In this embodiment, the fire extinguishing apparatus container valve 43 can control the start and stop of the fire extinguishing apparatus by controlling the start and stop of the electromagnetic valve 45.

in this embodiment, the check valve 50 is disposed between the balance pipe 44 and the fire detecting pipe 53, when there is air leakage in the fire detecting pipe 53, the air in the balance pipe 44 can be supplemented to the fire detecting pipe in time, so as to facilitate starting the fire extinguishing apparatus by discharging the air in the fire detecting pipe 53, the air in the fire detecting pipe 53 cannot reversely enter the air in the balance pipe 44, so that when the container valve 43 is started by using the electromagnetic driving device 45, the pressure in the balance cavity of the container valve can be rapidly discharged, and the electrically controlled starting response speed of the fire extinguishing apparatus is increased.

In addition to the preferred embodiments described above, other embodiments of the present invention can be devised by those skilled in the art, and various changes and modifications can be made without departing from the spirit and scope of the present invention.