CN113941105A

CN113941105A - Intelligent thermal-triggering fire extinguishing device and method, battery pack, energy storage system and vehicle

Info

Publication number: CN113941105A
Application number: CN202010688155.4A
Authority: CN
Inventors: 李飞; 姜乃文; 赵艳春; 王宇豪; 周天野
Original assignee: Zephyr Intelligent System Shanghai Co Ltd
Current assignee: Zephyr Intelligent System Shanghai Co Ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2022-01-18
Anticipated expiration: 2040-07-16
Also published as: CN113941105B

Abstract

The application relates to an intelligent thermal-triggering fire extinguishing device and method, a battery pack, an energy storage system and a vehicle, wherein a liquid inlet of a fire extinguishing agent flowing pipeline is communicated with the interior of a fire extinguishing agent storage unit, a liquid outlet of the fire extinguishing agent flowing pipeline is provided with a temperature sensing nozzle, and fluid with a preset initial pressure value is arranged in the fire extinguishing agent flowing pipeline; a temperature sensing element is arranged in the temperature sensing sprayer, and the temperature sensing element deforms when sensing that the real-time temperature value at the preset position belongs to a preset deformation temperature threshold range, so that the fluid is sprayed out through the temperature sensing sprayer and the real-time fluid pressure value is reduced; when the real-time fluid pressure value is smaller than or equal to the preset liquid supply pressure threshold value, the pressure balance valve conducts the liquid supply passage from the fire extinguishing agent storage unit to the fire extinguishing agent flow pipeline, so that the fire extinguishing agent in the fire extinguishing agent storage unit is sprayed out through the temperature sensing spray head, and intelligent fixed-point and directional fire extinguishing is achieved.

Description

Intelligent thermal-triggering fire extinguishing device and method, battery pack, energy storage system and vehicle

Technical Field

The invention relates to the technical field of fire extinguishing, in particular to an intelligent thermal triggering fire extinguishing device, an intelligent thermal triggering fire extinguishing method, a battery pack, an energy storage system and a vehicle.

Background

With the increasing demand of the electric vehicles in the market, the electric vehicles are becoming one of the main vehicles to replace the original fuel vehicles. Under the background, the energy density of lithium ion batteries used in new energy electric vehicles is continuously improved, and the volume and the capacity of battery packs are continuously enlarged. The thermal runaway risk and the damage degree of the lithium ion battery are increased more and more while the endurance mileage is improved. At present, the risk of thermal runaway of the lithium ion battery is widely considered as one of key problems limiting the development of new energy vehicles, and how to ensure that the safety of the outside of a battery pack, vehicles and personnel can still be ensured under the condition that the thermal runaway is generated due to the external action or the internal triggering of a lithium ion battery system is urgent.

However, take traditional power lithium cell as an example, the volume and the capacity of lithium cell package are big more, and the inside battery module of lithium cell package is also more, and the inside of battery module generally is provided with a plurality of battery monomer, and traditional extinguishing device can not carry out the fixed point to the different positions of battery package inside and put out a fire, does not mention and can carry out the fixed point to the battery monomer of battery package inside and put out a fire. And, if cooperate extinguishing device to realize intelligence and put out a fire with the help of sensor detection device, can reduce the reliability of system undoubtedly to the setting of sensor not only can increase the space volume that the lithium cell occupy, still can increase the cost of putting out a fire.

Disclosure of Invention

In view of the above, it is necessary to provide an intelligent thermal triggering fire extinguishing apparatus, method, battery pack, energy storage system and vehicle, which can perform targeted intelligent fire extinguishing on a part generating thermal runaway without adding a sensor, improve fire extinguishing efficiency, reduce the usage amount of a fire extinguishing agent, reduce labor cost, and improve fire extinguishing intelligence, efficiency and safety.

To achieve the above and other objects, the present application provides an intelligent thermal trigger fire extinguishing apparatus, comprising:

a fire extinguishing agent storage unit for storing and supplying a fire extinguishing agent;

the liquid inlet of the fire extinguishing agent flowing pipeline is communicated with the interior of the fire extinguishing agent storage unit, the liquid outlet of the fire extinguishing agent flowing pipeline is used for extending to a preset position, and fluid with a preset initial pressure value is arranged in the fire extinguishing agent flowing pipeline;

the pressure balance valve is connected in series between the liquid outlet of the fire extinguishing agent storage unit and the liquid inlet of the fire extinguishing agent flowing pipeline and is used for detecting the real-time fluid pressure value at the liquid inlet of the fire extinguishing agent flowing pipeline;

the temperature sensing nozzle is arranged at the liquid outlet of the fire extinguishing agent flow pipeline, a temperature sensing element is arranged inside the temperature sensing nozzle and blocks the liquid outlet of the fire extinguishing agent flow pipeline within a preset normal working temperature range, the temperature sensing element deforms when sensing that a real-time temperature value at the preset position belongs to a preset deformation temperature threshold range, so that the fluid is sprayed out through the temperature sensing nozzle and the real-time fluid pressure value is reduced, and the deformation comprises at least one of melting, softening or embrittlement;

wherein the pressure balancing valve is configured to:

and when the real-time fluid pressure value is smaller than or equal to a preset liquid supply pressure threshold value, the liquid supply passage from the fire extinguishing agent storage unit to the fire extinguishing agent flow pipeline is conducted, so that the fire extinguishing agent in the fire extinguishing agent storage unit is sprayed out through the temperature sensing spray head to realize fixed-point and directional fire extinguishing.

In the intelligent thermal trigger fire extinguishing apparatus in the above embodiment, the temperature sensing nozzle at the outlet of the fire extinguishing agent flowing pipeline can be extended to the preset position, the temperature sensing element in the temperature sensing nozzle at the preset position is sensed to deform when the real-time temperature value at the preset position belongs to the preset deformation temperature threshold range, so that the fluid in the fire extinguishing agent flowing pipeline is sprayed out through the temperature sensing nozzle, the real-time fluid pressure value in the fire extinguishing agent flowing pipeline is reduced, and the fire extinguishing agent in the fire extinguishing agent storage unit is sprayed out through the temperature sensing nozzle to extinguish fire at fixed points and directionally. This application is not adding under the condition of sensor, carries out the pertinence intelligence to the position that produces thermal runaway and puts out a fire to reduce the use amount of fire extinguishing agent when improving fire extinguishing efficiency. Because this application triggers intelligence function of putting out a fire based on temperature-sensing, realize the fixed point, the directional fire extinguishing, improved intelligent, high efficiency and the security of putting out a fire when reducing the cost of labor.

In one embodiment, the pressure balancing valve is further configured to:

and when the real-time fluid pressure value is greater than a preset liquid supply pressure threshold value, the pressure balance valve blocks a liquid supply passage from the fire extinguishing agent storage unit to the fire extinguishing agent flow pipeline.

In one embodiment, the pressure balancing valve comprises:

a valve body having a hollow cylinder;

the piston is positioned in the cylinder and divides the cylinder into a first isolated cylinder cavity and a second cylinder cavity close to the fire extinguishing agent flowing pipeline;

a liquid inlet port through which the first cylinder chamber communicates with the interior of the fire extinguishing agent storage unit;

a liquid outlet port, through which the second cylinder chamber communicates with the interior of the fire suppressant flow line, the liquid outlet port being initially located within the interior of the second cylinder chamber;

wherein the piston is configured to: when the real-time fluid pressure value in the second cylinder cavity is smaller than or equal to a preset liquid supply pressure threshold value, the second cylinder cavity is moved towards the direction of reducing the volume of the second cylinder cavity and increasing the volume of the first cylinder cavity, so that the liquid outlet port is located in the first cylinder cavity, and the fire extinguishing agent in the fire extinguishing agent storage unit flows into the fire extinguishing agent flowing pipeline after sequentially flowing through the first cylinder cavity and the liquid outlet port.

In the intelligent thermal triggering fire extinguishing apparatus in the above embodiment, the piston inside the pressure balance valve can dynamically move based on a pressure difference between the inside of the first cylinder cavity and the inside of the second cylinder cavity on both sides of the piston, and when a real-time fluid pressure value in the second cylinder cavity is less than or equal to a preset liquid supply pressure threshold value, the piston moves in a direction of reducing the volume of the second cylinder cavity and increasing the volume of the first cylinder cavity, so that the liquid outlet port is located inside the first cylinder cavity, and a fire extinguishing agent in the fire extinguishing agent storage unit flows into the fire extinguishing agent flow pipeline after sequentially flowing through the first cylinder cavity and the liquid outlet port, so that the fire extinguishing agent storage unit intelligently supplies the fire extinguishing agent to the fire extinguishing agent flow pipeline, thereby achieving intelligent, fixed-point and directional fire extinguishing.

In one embodiment, the temperature sensing element comprises at least one of fusible alloy, memory alloy, thermoplastic resin, heat sensitive sealing powder or thermoplastic glass, so as to select the type of the temperature sensing element in the temperature sensing nozzle according to different requirements of different application scenarios.

In one embodiment, the fluid is a fire extinguishing agent, the preset initial pressure value is greater than the preset liquid supply pressure threshold value, so that when the temperature sensing element in the temperature sensing nozzle senses that the real-time temperature value at the preset position belongs to the preset deformation temperature threshold value range and deforms, the temperature sensing element breaks under the extrusion of high-pressure fluid inside the fire extinguishing agent flow pipeline, and the fire extinguishing agent in the fire extinguishing agent storage unit is sprayed out through the temperature sensing nozzle to extinguish fire in a fixed point and in a directional mode.

In one embodiment, the fluid comprises an inert gas, and the preset initial pressure value is greater than the preset liquid supply pressure threshold value. Compare in the inside at fire extinguishing agent flow line only be provided with the fire extinguishing agent of predetermineeing initial pressure value, alleviate or avoided because of the fire extinguishing agent for a long time to the ageing condition emergence of pipeline that leads to of fire extinguishing agent flow line and temperature-sensing shower nozzle corruption, improved intelligent thermal trigger extinguishing device's life and job stabilization nature.

In one embodiment, the intelligent thermally triggered fire extinguishing device further comprises:

the overpressure release valve is arranged on the fire extinguishing agent flow pipeline and used for limiting the real-time air pressure value inside the fire extinguishing agent flow pipeline;

the overpressure relief valve is configured to:

and when the real-time air pressure value is greater than or equal to a preset safety pressure threshold value, opening a path from the fire extinguishing agent flow pipeline to the air leakage outside the fire extinguishing agent flow pipeline.

In the intelligent thermal triggering fire extinguishing apparatus in the above embodiment, the overpressure relief valve can limit the real-time air pressure value inside the fire extinguishing agent flow pipeline to be below the preset safety pressure threshold value, so as to avoid the occurrence of the situation that the temperature sensing nozzle is mistakenly sprayed due to the overhigh real-time air pressure value inside the fire extinguishing agent flow pipeline.

In one embodiment, the intelligent thermal trigger fire extinguishing device further comprises a pressure sensor, wherein the pressure sensor is used for detecting a real-time pressure value inside the fire extinguishing agent storage unit and providing the real-time pressure value to the micro control unit and/or the vehicle-mounted control center, so that the micro control unit and/or the vehicle-mounted control center can control and execute a preset action according to the real-time pressure value in time, and the intelligence of fire extinguishing is further improved.

the micro control unit is connected with the pressure sensor and used for receiving the real-time pressure value and generating an alarm control signal according to the real-time pressure value;

and the alarm device is connected with the micro control unit and used for receiving the alarm control signal, executing a preset alarm action according to the alarm control signal and reminding a user to take corresponding safety measures in time, so that the timeliness and intelligence of fire extinguishment are further improved.

In one embodiment, the micro-control unit is configured to generate the alarm control signal when a real-time pressure value within the fire extinguishing agent storage unit is less than or equal to a preset leakage pressure threshold value. The user is reminded in time that the fire extinguishing agent storage unit has the weeping condition, avoids leading to unnecessary economic loss because of the weeping.

In one embodiment, the preset alarm action includes generating at least one of alarm sound information, alarm image information or alarm smell information to improve the diversity and visualization degree of the alarm.

a first filling core for evacuating the fire extinguishing agent storage unit and for filling the fire extinguishing agent storage unit with a fire extinguishing agent;

and the first sealing valve is used for sealing the fire extinguishing agent storage unit after the action of filling the fire extinguishing agent is completed.

a second filling core for evacuating the fire extinguishing agent flow line and for filling the interior of the fire extinguishing agent flow line with a fluid;

and the second sealing valve is used for sealing the fire extinguishing agent flow pipeline after the action of filling the fluid is completed.

In one embodiment, the fire suppressant flow line comprises:

a liquid inlet of the main-way through pipe is communicated with the interior of the fire extinguishing agent storage unit;

the liquid inlet of each branch through pipe is communicated with the interior of the main way through pipe, and the liquid outlet of each branch through pipe is used for respectively extending to different preset positions;

the liquid outlets of the branch pipe through pipes are provided with the temperature sensing nozzles, and a temperature sensing element in the temperature sensing nozzle at any preset position deforms when sensing that the real-time temperature value at the preset position belongs to a preset deformation temperature threshold range, so that the fire extinguishing agent in the fire extinguishing agent storage unit is sprayed out through the temperature sensing nozzles to extinguish fire by spraying the fire extinguishing agent at a fixed point and in a directional mode.

In the intelligent thermal trigger fire extinguishing apparatus in the above embodiment, the flowing pipeline of the fire extinguishing agent is arranged to comprise the main pipeline and the branch pipelines, so that the temperature sensing nozzles at the liquid outlets of the branch pipelines can be conveniently extended to different preset positions, intelligent fixed-point and directional fire extinguishing is realized, and the application field and the application range of the intelligent thermal trigger fire extinguishing apparatus are widened.

In one embodiment, at least one of the branch ducts comprises:

a first-stage branch pipe;

a liquid inlet of each secondary branch through pipe is communicated with the inside of the primary branch through pipe, and a liquid outlet of each secondary branch through pipe extends to each preset position;

the liquid outlet of each secondary branch through pipe is provided with the temperature sensing spray head.

In the intelligent thermal trigger fire extinguishing apparatus in the above embodiment, the branch pipes are arranged to comprise the first-stage branch pipe and the second-stage branch pipes, so that the temperature sensing nozzles at the liquid outlets of the second-stage branch pipes can be conveniently extended to different preset positions, intelligent fixed-point and directional fire extinguishing is realized, and the application field and the application range of the intelligent thermal trigger fire extinguishing apparatus are widened.

In one embodiment, the fire extinguishing agent is in at least one of a gaseous state, a liquid state, a gas-liquid mixed state, a solid-liquid mixed state or a gas-solid-liquid mixed state; the fire extinguishing agent includes at least one of hexafluoropropane, heptafluoropropane, perfluorohexanone, carbon dioxide, nitrogen, helium or argon. Can select the composition of fire extinguishing agent according to the different demands of the concrete application scene of intelligent thermal trigger extinguishing device, when improving fire extinguishing efficiency, avoid the fire extinguishing agent who puts to cause harmful effects to on-vehicle component or peripheral article.

A second aspect of the present application provides a battery pack, including a plurality of battery modules; and the intelligent thermal trigger fire extinguishing device according to any embodiment of the application, wherein the temperature sensing nozzle at the liquid outlet of the fire extinguishing agent flowing pipeline extends to a preset position inside and/or outside the battery module.

A third aspect of the present application provides an energy storage system, which includes a plurality of energy storage modules; and the intelligent thermal trigger fire extinguishing device according to any embodiment of the application, wherein the temperature sensing nozzle at the liquid outlet of the fire extinguishing agent flowing pipeline extends to a preset position inside and/or outside the energy storage module.

A fourth aspect of the present application provides a vehicle comprising an intelligent thermally triggered fire suppression apparatus as described in any of the embodiments of the present application, wherein the temperature sensing nozzle at the outlet of the fire suppressant flow line extends to a predetermined position inside and/or outside the vehicle.

A fifth aspect of the present application provides an intelligent heat-triggered fire extinguishing method, comprising:

the method comprises the steps that a real-time temperature value at a preset position is detected based on a temperature sensing nozzle, the temperature sensing nozzle is arranged at a liquid outlet of a fire extinguishing agent flow pipeline, a temperature sensing element is arranged inside the temperature sensing nozzle, the temperature sensing element blocks the liquid outlet of the fire extinguishing agent flow pipeline within a preset normal working temperature range, a liquid inlet of the fire extinguishing agent flow pipeline is communicated with the inside of a fire extinguishing agent storage unit, the liquid outlet of the fire extinguishing agent flow pipeline extends to the preset position, and the fire extinguishing agent storage unit is used for storing and supplying a fire extinguishing agent;

detecting a real-time fluid pressure value at an inlet of a fire extinguishing agent flowing pipeline based on a pressure balance valve, wherein the pressure balance valve is connected in series between a liquid outlet of a fire extinguishing agent storage unit and a liquid inlet of the fire extinguishing agent flowing pipeline, and fluid with a preset initial pressure value is arranged in the fire extinguishing agent flowing pipeline;

when the real-time temperature value belongs to a preset deformation temperature threshold range, enabling the fluid to be sprayed out through the temperature sensing spray head and reducing the real-time fluid pressure value based on deformation of the temperature sensing element, wherein the deformation comprises at least one of melting, softening or embrittlement;

when the real-time fluid pressure value is smaller than or equal to a preset liquid supply pressure threshold value, the liquid supply passage from the fire extinguishing agent storage unit to the fire extinguishing agent flowing pipeline is conducted on the basis of the pressure balance valve, so that the fire extinguishing agent in the fire extinguishing agent storage unit is sprayed out through the temperature sensing spray head to perform fixed-point and directional fire extinguishing.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain drawings of other embodiments based on these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of an intelligent thermal-triggered fire extinguishing apparatus provided in a first embodiment of the present application.

Fig. 2 is a schematic structural diagram of an intelligent thermal-triggered fire extinguishing apparatus provided in a second embodiment of the present application.

Fig. 3 is a schematic structural diagram of an intelligent thermal-triggered fire extinguishing apparatus provided in a third embodiment of the present application.

Fig. 4 is a schematic structural diagram of an intelligent thermal-triggered fire extinguishing apparatus provided in a fourth embodiment of the present application.

Fig. 5 is a schematic structural diagram of an intelligent thermal-triggered fire extinguishing apparatus provided in a fifth embodiment of the present application.

Fig. 6 is a schematic view of an application scenario of an intelligent thermal trigger fire extinguishing apparatus provided in a sixth embodiment of the present application.

Fig. 7 is a schematic view of an application scenario of an intelligent thermal trigger fire extinguishing apparatus provided in a seventh embodiment of the present application.

Fig. 8 is a schematic view of an application scenario of an intelligent thermal trigger fire extinguishing apparatus provided in an eighth embodiment of the present application.

Fig. 9 is a schematic view of an application scenario of an intelligent thermal trigger fire extinguishing apparatus provided in a ninth embodiment of the present application.

Fig. 10 is a schematic structural diagram of a battery pack provided in a tenth embodiment of the present application.

Fig. 11 is a schematic cross-sectional view a-a of the component illustrated in fig. 10.

Fig. 12 is a schematic structural diagram of a temperature-sensing nozzle in an intelligent thermal-triggered fire extinguishing apparatus according to an eleventh embodiment of the present application.

Fig. 13 is a schematic structural diagram of a temperature-sensing nozzle in an intelligent thermal-triggered fire extinguishing apparatus according to a twelfth embodiment of the present application.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present application.

In this application, the term "number" means one or more.

In this application, unless otherwise expressly stated or limited, the terms "communicate," "connect," and the like are to be construed broadly, e.g., as meaning direct communication, indirect communication via an intermediary, communication between two elements, or the interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1, in an embodiment of the present application, an intelligent thermal trigger fire extinguishing apparatus includes a fire extinguishing agent storage unit 10, a pressure balancing valve 20, a fire extinguishing agent flow line 30, and a temperature sensing nozzle 40. The fire extinguishing agent storage unit 10 is used for storing and supplying a fire extinguishing agent; a liquid inlet of the fire extinguishing agent flow pipeline 30 is communicated with the interior of the fire extinguishing agent storage unit 10, a liquid outlet of the fire extinguishing agent flow pipeline 30 is used for extending to a preset position, and fluid with a preset initial pressure value is arranged in the fire extinguishing agent flow pipeline 30; the pressure balance valve 20 is connected in series between the liquid outlet of the fire extinguishing agent storage unit 10 and the liquid inlet of the fire extinguishing agent flowing pipeline 30, and is used for detecting the real-time fluid pressure value at the liquid inlet of the fire extinguishing agent flowing pipeline 30; the temperature sensing nozzle 40 is arranged at the liquid outlet of the fire extinguishing agent flowing pipeline 30, a temperature sensing element is arranged inside the temperature sensing nozzle 40, the temperature sensing element blocks the liquid outlet of the fire extinguishing agent flowing pipeline within a preset normal working temperature range, and the temperature sensing element deforms when sensing that the real-time temperature value at the preset position belongs to a preset deformation temperature threshold value range, so that the fluid is sprayed out through the temperature sensing nozzle and the real-time fluid pressure value is reduced, and the deformation comprises at least one of melting, softening or embrittlement; wherein the pressure balancing valve 20 is configured to: when the real-time fluid pressure value is smaller than or equal to the preset liquid supply pressure threshold value, a liquid supply passage from the fire extinguishing agent storage unit 10 to the fire extinguishing agent flow pipeline 30 is opened, so that the fire extinguishing agent in the fire extinguishing agent storage unit 10 is sprayed out through the temperature sensing spray head 40, and the fire is extinguished in a fixed point and a directional mode.

Preferably, in one embodiment of the present application, the pressure balancing valve is further configured to: when the real-time fluid pressure value is larger than a preset liquid supply pressure threshold value, the pressure balance valve blocks a liquid supply passage from the fire extinguishing agent storage unit to the fire extinguishing agent flowing pipeline, so that the pressure balance valve can dynamically open or block the liquid supply passage from the fire extinguishing agent storage unit to the fire extinguishing agent flowing pipeline according to the detected real-time fluid pressure value at the liquid inlet of the fire extinguishing agent flowing pipeline.

Specifically, among the intelligent thermal trigger extinguishing device in above-mentioned embodiment, can extend the temperature-sensing shower nozzle of fire extinguishing agent flow line liquid outlet department to preset the position, temperature-sensing element in the temperature-sensing shower nozzle of presetting position department is sensing when the real-time temperature value of presetting position department belongs to and predetermines deformation temperature threshold value scope time deformation for fluid via in the fire extinguishing agent flow line the blowout of temperature-sensing shower nozzle reduces the real-time fluid pressure value in the fire extinguishing agent flow line, thereby makes the fire extinguishing agent via in the fire extinguishing agent storage unit the blowout of temperature-sensing shower nozzle to the fixed point is put out a fire with the orientation. This application is not adding under the condition of sensor, carries out the pertinence intelligence to the position that produces thermal runaway and puts out a fire to reduce the use amount of fire extinguishing agent when improving fire extinguishing efficiency. Because this application triggers intelligence function of putting out a fire based on temperature-sensing, realize the fixed point, the directional fire extinguishing, improved intelligent, high efficiency and the security of putting out a fire when reducing the cost of labor.

Further, in one embodiment of the present application, with continued reference to fig. 1, the pressure balance valve 20 includes a valve body, a piston 21, a first cylinder chamber 22, a second cylinder chamber 23, an inlet port 24, and an outlet port 25. The valve body has a hollow cylinder; a piston 21 is located inside the cylinder, dividing the cylinder into a first isolated cylinder chamber 22 and a second cylinder chamber 23 adjacent the fire suppressant flow line; the first cylinder chamber 22 communicates with the interior of the fire extinguishing agent storage unit 10 via the liquid inlet port 24; the second cylinder chamber 23 is communicated with the interior of the fire extinguishing agent flowing pipeline 30 through a liquid outlet port 25, and the liquid outlet port 25 is positioned in the interior of the second cylinder chamber 23 at the initial position; wherein the piston 21 is configured to: when the real-time fluid pressure value in the second cylinder cavity 23 is smaller than or equal to the preset liquid supply pressure threshold value, the second cylinder cavity 23 is moved in the direction of reducing the volume of the second cylinder cavity 23 and increasing the volume of the first cylinder cavity 22, so that the liquid outlet port 25 is located inside the first cylinder cavity 22, and the fire extinguishing agent inside the fire extinguishing agent storage unit 10 flows into the fire extinguishing agent flowing pipeline 30 after sequentially flowing through the first cylinder cavity 22 and the liquid outlet port 25.

Specifically, in the intelligent thermal triggering fire extinguishing apparatus in the above embodiment, the piston 21 inside the pressure balance valve 20 can dynamically move based on a pressure difference between the inside of the first cylinder cavity 22 and the inside of the second cylinder cavity 23 on both sides of the piston 21, when a real-time fluid pressure value in the second cylinder cavity 23 is less than or equal to a preset liquid supply pressure threshold value, the piston 21 moves in a direction of reducing the volume of the second cylinder cavity 23 and increasing the volume of the first cylinder cavity 22, so that the liquid outlet port 25 is located inside the first cylinder cavity 22, and the fire extinguishing agent in the fire extinguishing agent storage unit flows into the fire extinguishing agent flowing pipeline after sequentially flowing through the first cylinder cavity and the liquid outlet port, so that the fire extinguishing agent storage unit intelligently supplies the fire extinguishing agent to the fire extinguishing agent flowing pipeline, thereby realizing intelligent, fixed-point and directional fire extinguishing.

Preferably, in an embodiment of the present application, with continued reference to fig. 1, the temperature-sensing element in the temperature-sensing nozzle 40 comprises at least one of a fusible alloy, a memory alloy, a thermoplastic resin, a heat-sensitive sealing powder, or a thermoplastic glass, so as to select the type of the temperature-sensing element in the temperature-sensing nozzle according to different requirements of different application scenarios.

Preferably, in an embodiment of the present application, please refer to fig. 1 again, a fire extinguishing agent (not shown in fig. 1) with a preset initial pressure value is disposed inside the fire extinguishing agent flowing pipeline 30, the fire extinguishing agent may be a gaseous fire extinguishing agent, a liquid fire extinguishing agent or a gas-liquid mixture state fire extinguishing agent, the preset initial pressure value is greater than the preset liquid supply pressure threshold value, so that when the temperature sensing element in the temperature sensing nozzle senses that the real-time temperature value at the preset position falls within the preset deformation temperature threshold range and deforms, the temperature sensing element breaks under the extrusion of the high-pressure fluid inside the fire extinguishing agent flowing pipeline, so that the fire extinguishing agent in the fire extinguishing agent storage unit is sprayed out through the temperature sensing nozzle to perform fixed-point and directional fire extinguishing.

In one embodiment, the fluid comprises an inert gas, for example, the fluid may be configured to comprise one or more of nitrogen, argon, helium, or the like; it may also be provided that the fluid comprises a mixture of an inert gas and a fire extinguishing agent. The preset initial pressure value is larger than the preset liquid supply pressure threshold value. Compare in the inside at fire extinguishing agent flow line only be provided with the fire extinguishing agent of predetermineeing initial pressure value, avoided or alleviateed because of the fire extinguishing agent takes place to the condition that fire extinguishing agent flow line and temperature-sensing shower nozzle corrode for a long time and lead to the pipeline ageing, improved intelligent thermal trigger extinguishing device's life and job stabilization nature.

Further, referring to fig. 2, in an embodiment of the present application, an intelligent thermal triggering fire extinguishing apparatus further includes an overpressure relief valve 50, where the overpressure relief valve 50 is disposed on the fire extinguishing agent flow pipeline 30, for example, the overpressure relief valve 50 may be disposed on the outer surface of the fire extinguishing agent flow pipeline 30 for limiting the real-time air pressure value inside the fire extinguishing agent flow pipeline; the overpressure relief valve is configured to: when the real-time air pressure value is greater than or equal to the preset safe pressure threshold value, a path for air leakage from the fire extinguishing agent flow pipeline 30 to the outside of the fire extinguishing agent flow pipeline 30 is opened.

In the intelligent thermal triggering fire extinguishing apparatus in the above embodiment, please refer to fig. 2 again, the overpressure relief valve 50 can limit the real-time air pressure value inside the fire extinguishing agent flowing pipeline 30 to be below the preset safe pressure threshold, so as to avoid the occurrence of the false fire of the temperature sensing nozzle caused by the overhigh real-time air pressure value inside the fire extinguishing agent flowing pipeline 30.

Further, please refer to fig. 3, in an embodiment of the present application, the intelligent thermal trigger fire extinguishing apparatus further includes a pressure sensor 11, where the pressure sensor 11 is configured to detect a real-time pressure value inside the fire extinguishing agent storage unit 10, and provide the real-time pressure value to the micro control unit and/or the vehicle-mounted control center, so that the micro control unit and/or the vehicle-mounted control center can execute a preset action in time according to the real-time pressure value, and the intelligence of fire extinguishing is further improved.

Further, in an embodiment of the present application, an intelligent thermal-triggered fire extinguishing apparatus further includes a micro control unit (not shown) and an alarm device (not shown), where the micro control unit is connected to the pressure sensor, and is configured to receive the real-time pressure value and generate an alarm control signal according to the real-time pressure value; the alarm device is connected with the micro control unit and used for receiving the alarm control signal, executing a preset alarm action according to the alarm control signal and reminding a user to take corresponding safety measures in time, so that the timeliness and the intelligence of fire extinguishing are further improved.

Preferably, in one embodiment of the present application, the micro control unit is configured to generate the alarm control signal when a real-time pressure value within the fire extinguishing agent storage unit is less than or equal to a preset leakage pressure threshold value. The user is reminded in time that the fire extinguishing agent storage unit has the weeping condition, avoids leading to unnecessary economic loss because of the weeping.

Preferably, in an embodiment of the present application, the preset alarm action includes generating at least one of alarm sound information, alarm image information or alarm smell information to improve the diversity and visualization degree of the alarm.

Further, referring to fig. 4, in an embodiment of the present application, an intelligent thermal trigger fire extinguishing apparatus further includes a first charging core 12 and a first sealing valve 13. The first filling core 12 is used for evacuating the fire extinguishing agent storage unit 10 and for filling the fire extinguishing agent storage unit 10 with the fire extinguishing agent; the first sealing valve 13 is used to seal the fire extinguishing agent storage unit 10 after the fire extinguishing agent filling operation is completed.

Further, with continuing reference to fig. 4, in an embodiment of the present application, an intelligent thermal fire extinguisher further includes a second charging core 31 and a second sealing valve 32. The second filling core 31 serves to evacuate the fire extinguishing agent flow line 30 and to fill the interior of the fire extinguishing agent flow line 30 with fluid; the second sealing valve 32 is used to seal the fire suppressant flow line 30 after the fluid filling action is completed.

Further, with continuing reference to fig. 4, in an embodiment of the present application, an intelligent thermal trigger fire extinguisher further includes a first airtight connector 26, a mounting hose 27 and a second airtight connector 33. A first airtight joint 26 connects the liquid outlet port 25 of the pressure balance valve 20 with one end of the installation hose 27 to ensure the airtightness of the connection piping; the second airtight joint 33 connects the other end of the installation hose 27 with the liquid inlet of the fire extinguishing agent flow pipeline 30, so as to realize the sealed connection between the installation hose 27 and the fire extinguishing agent flow pipeline 30.

Further, referring to fig. 5, in an intelligent thermal trigger fire extinguishing apparatus provided in an embodiment of the present application, the fire extinguishing agent flow pipeline includes a main channel pipe 34 and a plurality of branch channel pipes 35. The liquid inlet of the main passage pipe 34 is communicated with the interior of the fire extinguishing agent storage unit 10; a liquid inlet of each branch through pipe 35 is communicated with the interior of the main through pipe 34, and a liquid outlet of each branch through pipe 35 is used for respectively extending to different preset positions; wherein, the liquid outlet of each branch road siphunculus 35 all is provided with temperature sensing nozzle 40, and the sensing of the temperature sensing element in the temperature sensing nozzle 40 of arbitrary preset position department is being out of shape when the real-time temperature value of preset position department belongs to preset deformation temperature threshold value scope for fire extinguishing agent in the fire extinguishing agent memory cell 10 is via the blowout of temperature sensing nozzle 40, puts out a fire with fixed point and directional injection fire extinguishing agent.

Preferably, in one embodiment of the present application, the at least one bypass duct includes a primary bypass duct (not shown) and a secondary bypass duct (not shown). A liquid inlet of each secondary branch through pipe is communicated with the interior of the primary branch through pipe, and a liquid outlet of each secondary branch through pipe extends to each preset position respectively; the liquid outlet of each secondary branch through pipe is provided with the temperature sensing spray head.

Further, please refer to fig. 6 continuously, in an intelligent thermal triggering fire extinguishing apparatus provided in an embodiment of the present application, the fire extinguishing agent flowing pipeline 30 may be disposed on the battery pack body 100, for example, may be disposed on an upper cover of the battery pack body 100, and a plurality of temperature sensing nozzles (not shown in fig. 6) are disposed on the fire extinguishing agent flowing pipeline 30, so that a temperature sensing element, such as a fusible alloy, in an adjacent temperature sensing nozzle triggered by a thermal runaway of any battery module 102 melts, and the fire extinguishing agent in the fire extinguishing agent flowing pipeline 30 is sprayed out through the temperature sensing nozzles, so as to spray the fire extinguishing agent to extinguish a thermal runaway battery module. In other embodiments of this application, also can set up fire extinguishing agent flow line 30 on the inside bottom surface of the casing of battery package body to the realization is sprayed fire extinguishing agent to the battery module that takes place thermal runaway and is put out a fire.

Preferably, with continued reference to fig. 6, a channel may be provided on the battery pack body for receiving the fire extinguishing agent flow pipe 30 such that the fire extinguishing agent flow pipe 30 is embedded on the battery pack body. In other embodiments of the present application, the fire extinguishing agent flowing pipeline 30 may also be fixed to the battery pack body by one or more of clamping, screwing or welding, and of course, the fire extinguishing agent flowing pipeline 30 may also be indirectly fixed to the battery pack body by a bracket. The connection of the fire extinguishing agent flow line 30 to the battery pack body 100 is only schematically shown here, and is not intended to limit the application.

Further, referring to fig. 7 and 8, in an embodiment of the present application, in an intelligent thermal trigger fire extinguishing apparatus, the fire extinguishing agent flow pipe 30 is provided on the upper cover of the battery pack body 100, and a plurality of temperature sensing spray heads (not shown in fig. 7) are provided on the fire extinguishing agent flow pipe 30, the fire extinguishing agent flowing pipeline 30 can be arranged to be distributed on the upper cover of the battery pack body in a wavy form such as a pulse waveform or a sine waveform, so that the temperature sensing nozzle on the fire extinguishing agent flow line 30 covers or is adjacent to all of the battery modules 102 as completely as possible, the temperature sensing element in the temperature sensing nozzle adjacent to any battery module 102 triggered by thermal runaway, such as fusible alloy, melts, and the fire extinguishing agent in the fire extinguishing agent flowing pipeline 30 is sprayed out through the temperature sensing nozzle, so as to spray the fire extinguishing agent to the battery module in which the thermal runaway occurs to extinguish the fire.

Further, referring to fig. 9, the fire extinguishing agent flowing pipeline 30 may include a plurality of fire extinguishing agent through pipes 301, and at least one fire extinguishing agent through pipe 301 is disposed on the battery pack body 100, such as the upper cover, in a wavy form, such as a pulse waveform or a sine waveform.

Further, referring to fig. 10, in an embodiment of the present application, the intelligent thermal triggering fire extinguishing apparatus in an embodiment of the present application is applied to an electric vehicle battery pack, a housing 100 of the battery pack includes 4 cavity bodies 101 for accommodating battery modules, and each cavity body 101 is provided with 2 battery modules. Intelligence thermal trigger extinguishing device includes 4 branch road siphunculuss 35, and the liquid outlet of each branch road siphunculus 35 all is provided with the temperature-sensing shower nozzle. When the temperature sensing element in the temperature sensing nozzle at the preset position senses that the real-time temperature value at the preset position belongs to the preset deformation temperature threshold range, the temperature sensing nozzle deforms, so that the fluid in the branch pipeline at the preset position is sprayed out through the temperature sensing nozzle, the real-time fluid pressure value in the fire extinguishing agent flowing pipeline is reduced, and the fire extinguishing agent in the fire extinguishing agent storage unit 10 is sprayed out through the temperature sensing nozzle to extinguish fire in a fixed point and a directional mode. This application is not adding under the condition of sensor, carries out the pertinence intelligence to the position that produces thermal runaway and puts out a fire to reduce the use amount of fire extinguishing agent when improving fire extinguishing efficiency. Because this application triggers intelligence function of putting out a fire based on temperature-sensing, realize the fixed point, the directional fire extinguishing, battery module to taking place thermal runaway carries out the pertinence and puts out a fire, the speed that high pressure fire extinguishing agent sprayed is greater than the thermal spread speed that thermal runaway's battery module release high temperature impurity arouses, therefore speed and the efficiency of the cooling of putting out a fire have been improved effectively, thereby improved fire extinguishing efficiency under the condition of not addding the sensor, and reduce the use amount of fire extinguishing agent, avoid producing harmful effects because of overuse fire extinguishing agent to other normal function's battery module or automobile body part.

Specifically, experiments show that when the temperature of the ternary lithium battery is about 120 ℃, a battery diaphragm is dissolved, the automatic turn-off effect can be temporarily inhibited, the temperature is continuously increased, and when the real-time temperature value reaches about 150 ℃, the automatic turn-off effect of the battery diaphragm begins to weaken and is heated sharply; when the real-time temperature value reaches about 180 ℃, the anode of the battery is decomposed to generate oxygen; if the heating is continuously increased sharply, the battery can enter a thermal runaway state, and the conditions of fire or explosion and the like are caused. Therefore, the real-time temperature value of the ternary lithium battery in the thermal runaway state is 150-180 ℃. The real-time temperature value of the lithium iron phosphate battery in the thermal runaway state is 200-240 ℃. The upper limit of the working temperature of the vehicle-gauge-grade parts is 85 ℃. If the lower limit value of the melting point of the temperature sensing element is less than 85 ℃, the requirement of the vehicle-specification-grade parts can not be met, the lower limit value conflicts with the vehicle-specification-grade standard, and misinjection can be caused; if the thermal runaway temperature value of the lithium battery is selected as the upper limit of the melting point of the temperature sensing element, the timely deformation of the temperature sensing nozzle before the thermal runaway is difficult to ensure, and the fire extinguishing agent is sprayed in a fixed-point and directional manner. If the temperature sensing element in the temperature sensing nozzle cannot be deformed in time, the best time for thermal runaway fire extinguishing can be missed, and the fire extinguishing failure can be caused. Therefore, the preset deformation temperature threshold range is set to be 85-180 ℃, so that not only can mistaken spraying be avoided, but also the adjacent temperature induction spray heads can be triggered to spray the fire extinguishing agent in time before the thermal runaway of the single battery can be ensured, fixed-point directional fire extinguishing is realized, and the using amount of the fire extinguishing agent is reduced while the fire extinguishing efficiency is improved.

Preferably, in an embodiment of the present application, the preset initial pressure value is 0.8MPa-4.5MPa, so that after the temperature sensing element in the temperature sensing nozzle is deformed, the high-pressure fire extinguishing agent can be sprayed out along a predetermined direction through the liquid outlet of the temperature sensing nozzle, thereby realizing fixed-point directional fire extinguishing, and reducing the usage amount of the fire extinguishing agent while improving the fire extinguishing efficiency.

Further, in an embodiment of the present application, a battery pack is provided, which includes a plurality of battery modules; and the intelligent thermal trigger fire extinguishing device according to any embodiment of the application, wherein the temperature sensing nozzle at the liquid outlet of the fire extinguishing agent flowing pipeline extends to a preset position inside and/or outside the battery module.

Further, in a battery pack provided in an embodiment of the present application, the branch duct includes m primary branch ducts and mn secondary branch ducts, m is a total number of cavity bodies included in an interior of a housing of the battery pack and used for accommodating battery modules, and n is a total number of battery modules in an interior of one of the cavity bodies; the ith primary branch through pipe Li is arranged on the surface of the side wall of the ith cavity body, liquid inlets of the secondary branch through pipes Lij are communicated with the inside of the primary branch through pipe Li, and liquid outlets of the secondary branch through pipes Lij are used for extending to preset positions in the cavity body; the liquid outlet of any secondary branch through pipe Lij is provided with the temperature sensing spray head; wherein i belongs to [1, m ], j belongs to [1, n ], i is a positive integer, j is a positive integer, m is an integer which is more than or equal to 1, and n is an integer which is more than or equal to 1.

As an example, referring to fig. 10, in an embodiment of the present application, the battery pack includes 8 cavity bodies 101, 2 battery modules 102 are disposed in any cavity body 101, and the branch pipes include 8 primary branch pipes 35 and 16 secondary branch pipes; the surface of the side wall of the 1 st hollow cavity is provided with a 1 st primary branch through pipe L1, and the inside of the 1 st hollow cavity is provided with a secondary branch through pipe L11 and a secondary branch through pipe L12; the surface of the side wall of the 2 nd cavity body is provided with a 2 nd primary branch through pipe L2, and the inside of the 2 nd cavity body is provided with a secondary branch through pipe L21 and a secondary branch through pipe L22; the surface of the side wall of the 3 rd hollow cavity is provided with a 3 rd primary branch through pipe L3, and the inside of the 3 rd hollow cavity is provided with a secondary branch through pipe L31 (not shown in FIG. 6) and a secondary branch through pipe L32; the surface of the side wall of the 4 th cavity body is provided with a 4 th primary branch through pipe L4, and the inside of the 4 th cavity body is provided with a secondary branch through pipe L41 and a secondary branch through pipe L42; the surface of the side wall of the 5 th cavity body is provided with a 5 th primary branch through pipe L5, and the inside of the 5 th cavity body is provided with a secondary branch through pipe L51 and a secondary branch through pipe L52; the surface of the side wall of the 6 th cavity body is provided with a 6 th primary branch through pipe L6, and the inside of the 6 th cavity body is provided with a secondary branch through pipe L61 and a secondary branch through pipe L62; the surface of the side wall of the 7 th cavity body is provided with a 7 th primary branch through pipe L7, and the inside of the 7 th cavity body is provided with a secondary branch through pipe L71 and a secondary branch through pipe L72; the surface of the side wall of the 8 th cavity body is provided with an 8 th primary branch through pipe L8, and the inside of the 8 th cavity body is provided with a secondary branch through pipe L81 and a secondary branch through pipe L82; the liquid inlet of each secondary branch through pipe is communicated with the inside of the primary branch through pipe, and the liquid outlet of each secondary branch through pipe extends to different preset positions inside the cavity body; the liquid outlet of any secondary branch pipe is provided with the temperature sensing spray head.

Specifically, among the intelligence thermal trigger extinguishing device in above-mentioned embodiment, the liquid outlet of second grade branch road siphunculus extends to the different preset position of the inside of the cavity body in the battery package, make all battery module in the battery package all correspond and be provided with temperature-sensing shower nozzle, be used for near real-time temperature value of each battery module of real-time sensing, and when arbitrary battery module takes place the thermal runaway, the temperature sensing element in the temperature-sensing shower nozzle that corresponds can in time sense the near real-time temperature value of the battery module that takes place the thermal runaway, and the fire extinguishing agent is spouted to automatic orientation, in order to carry out the pertinence to the battery module that takes place the thermal runaway and put out a fire.

As an example, referring to fig. 10, if thermal runaway occurs in the 1 st battery module 11 in the 1 st hollow cavity 101, the temperature sensing element in the temperature sensing nozzle at the liquid outlet of the secondary branch through pipe L11 is deformed, so that the fire extinguishing agent in the secondary branch through pipe L11 flows out through the liquid outlet of the temperature sensing nozzle and is sprayed to the surface of the battery module 11 where thermal runaway occurs, so as to extinguish the fire of the battery module 11.

Further, in the battery pack provided in an embodiment of the present application, q tertiary branch through pipes Lijk are provided on a surface of at least one secondary branch through pipe, liquid inlets of the tertiary branch through pipes Lijk are both communicated with an interior of the secondary branch through pipe Lij, and a liquid outlet of the tertiary branch through pipe Lijk is used for extending to a preset position in a battery module in the battery pack; q is the total number of the battery monomers in one battery module in one battery pack; the liquid outlet of any three-stage branch through pipe Lijk is provided with the temperature sensing spray head; wherein k belongs to [1, q ], k is a positive integer, and q is an integer greater than or equal to 1.

Specifically, in the battery package in above-mentioned embodiment, the liquid outlet of tertiary branch road siphunculus can extend to the inside preset position of different battery modules in the battery package for all battery monomer in the battery package all correspond and are provided with temperature-sensing shower nozzle, be used for the real-time temperature value near each battery monomer of real-time sensing, and when arbitrary battery monomer takes place the thermal runaway, the temperature sensing element in the temperature-sensing shower nozzle that corresponds can in time sense the real-time temperature value near the battery monomer that takes place the thermal runaway, make temperature-sensing shower nozzle in time spouts the fire extinguishing agent voluntarily, in order to carry out the pertinence to the battery monomer that takes place the thermal runaway and put out a fire.

As an example, referring to fig. 10 and 11, in an embodiment of the present application, the total number of battery cells in an interior of a battery module in the interior of the battery pack is 6, and an interior of the 1 st battery module 11 in the interior of the 1 st cavity includes a battery cell 111, a battery cell 112, a battery cell 113, a battery cell 114, a battery cell 115, and a battery cell 116; a third-level branch through pipe L111, a third-level branch through pipe L112, a third-level branch through pipe L113, a third-level branch through pipe L114, a third-level branch through pipe L115 and a third-level branch through pipe L116 are arranged in the battery module 11 adjacent to the liquid outlet of the 1 st second-level branch through pipe L11 in the 1 st cavity body, liquid inlets of the third-level branch through pipe L111, the third-level branch through pipe L112, the third-level branch through pipe L113, the third-level branch through pipe L114, the third-level branch through pipe L115 and the third-level branch through pipe L116 are all communicated with the inside of the second-level branch through pipe L11, and the liquid outlet of the third-level branch through pipe L111 extends to the inside of the 1 st battery module 11 in the 1 st cavity body and is adjacent to the position of the battery monomer 111; a liquid outlet of the tertiary branch pipe L112 extends to the inside of the 1 st battery module 11 in the 1 st hollow cavity and is adjacent to the position of the battery cell 112; a liquid outlet of the tertiary branch pipe L113 extends to the inside of the 1 st battery module 11 in the 1 st hollow cavity and is adjacent to the position of the battery cell 113; a liquid outlet of the tertiary branch pipe L114 extends to the inside of the 1 st battery module 11 in the 1 st hollow cavity and is adjacent to the position of the battery cell 114; a liquid outlet of the tertiary branch pipe L115 extends to the inside of the 1 st battery module 11 inside the 1 st hollow cavity and is adjacent to the position of the battery cell 115; a liquid outlet of the tertiary branch pipe L116 extends to the inside of the 1 st battery module 11 in the 1 st hollow cavity and is adjacent to the position of the battery monomer 116; liquid outlets of the third-stage branch through pipe L111, the third-stage branch through pipe L112, the third-stage branch through pipe L113, the third-stage branch through pipe L114, the third-stage branch through pipe L115 and the third-stage branch through pipe L116 are all provided with temperature sensing nozzles.

As an example, with continuing reference to fig. 10 and 11, when thermal runaway occurs in the 1 st battery cell 111 inside the 1 st battery module 11 inside the 1 st hollow cavity, the temperature sensing element in the temperature sensing nozzle at the liquid outlet of the tertiary branch through pipe L111 deforms, so that the fire extinguishing agent in the tertiary branch through pipe L111 flows out through the liquid outlet of the temperature sensing nozzle and is sprayed to the surface of the battery cell 111 where thermal runaway occurs, so as to extinguish the fire of the battery cell 111.

Preferably, in a battery pack provided in an embodiment of the present application, a liquid outlet of the temperature sensing nozzle is disposed opposite to an exhaust valve of the battery cell, so that a flow direction of the fire extinguishing agent coincides with a thermal runaway propagation direction, and the fire extinguishing agent covers from a thermal runaway occurrence position to a thermal runaway non-occurrence position. Because the melting temperature value of the temperature sensing element in the temperature sensing nozzle is less than or equal to the initial value of the temperature of the battery monomer when thermal runaway occurs, the temperature sensing nozzle sprays the fire extinguishing agent in advance at the moment when the thermal runaway occurs in the battery monomer, and the fire extinguishing agent is full of the limited space near the whole thermal runaway monomer. Because the geometric dimension of the limited space and the surface tension of the fire extinguishing agent can be mutually positively promoted and the saturated vapor pressure of the fire extinguishing agent is reversely limited, the fire extinguishing agent can be effectively resided in the adjacent space of the monomer generating thermal runaway, the energy released by the thermal runaway monomer is fully absorbed, the accumulation and the propagation of heat are reduced, and the thermal runaway spreading is prevented.

Further, in an embodiment of the present application, please refer to fig. 12 and 13, the temperature-sensing nozzle 40 includes a liquid inlet portion 41, a liquid outlet portion 42 and a temperature-sensing element 43, wherein a liquid inlet of the liquid inlet portion 41 is communicated with a liquid outlet of the branch pipe; a liquid inlet of the liquid outlet part 42 is communicated with a liquid outlet of the liquid inlet part; wherein, the maximum value of the inner diameter D of the liquid inlet part 41 is less than or equal to the minimum value of the inner diameter D of the liquid outlet part 42, and the liquid outlet part 42 is trumpet-shaped along the flowing direction of the fire extinguishing agent from the liquid outlet part 42, as shown in fig. 12. The temperature sensing nozzle 40 may be provided in a T-shape as shown in fig. 13. Of course, in other embodiments of the present application, the temperature-sensing nozzle 40 may be arranged in other columns.

Preferably, the value of the inner diameter d of the liquid inlet portion 41 is 1.5mm to 2.4 mm; the inner diameter D of the liquid outlet part 42 is 2.4mm-6 mm.

Specifically, in the intelligent thermal triggering fire extinguishing apparatus in the above embodiment, by setting the maximum value of the inner diameter D of the liquid inlet portion 41 to be less than or equal to the minimum value of the inner diameter D of the liquid outlet portion 42 and setting the liquid outlet portion 42 to be horn-shaped along the direction in which the fire extinguishing agent flows out from the liquid outlet portion 42, the high-pressure fire extinguishing agent in the liquid inlet portion 41 flows out through the horn-shaped liquid outlet portion 42 and tends to be diffusion-coated to cover an object in which thermal runaway occurs, so that the speed and efficiency of fire extinguishing and temperature reduction are effectively improved, and the usage amount of the fire extinguishing agent is reduced while the fire extinguishing efficiency is improved.

Preferably, in one embodiment of the present application, the bypass duct is a hose; and/or the main road through pipe is a hose. So that according to the inside different shapes or the volume of different battery module, optimize the overall arrangement design of branch road siphunculus and trunk road siphunculus, when saving siphunculus material cost and reducing installation use cost, improve extinguishing device's job stabilization nature.

Preferably, in one embodiment of the present application, the form of the fire extinguishing agent is at least one of a gas state, a liquid state, a gas-liquid mixed state, a solid-liquid mixed state or a gas-solid-liquid mixed state; the fire extinguishing agent includes at least one of hexafluoropropane, heptafluoropropane, perfluorohexanone, carbon dioxide, nitrogen, helium or argon.

By way of example, in one embodiment of the present application, the fire extinguishing agent comprises: heptafluoropropane accounts for 3 percent by weight of the mixture, carbon dioxide accounts for 17 percent by weight of the mixture, perfluorohexanone accounts for 80 percent by weight of the mixture, and the fire extinguishing agent is stored in a pressurized state; the heptafluoropropane, the carbon dioxide and the perfluorohexanone are pre-mixed and then canned into a fire extinguishing agent storage unit for storage.

By way of example, in one embodiment of the present application, the fire extinguishing agent comprises: hexafluoropropane constitutes 3 to 40% by volume of the fire extinguishing agent, heptafluoropropane 3 to 40% by volume of the fire extinguishing agent, and carbon dioxide as the remainder.

By way of example, in one embodiment of the present application, the fire extinguishing agent comprises: liquid heptafluoropropane and liquid carbon dioxide, wherein the heptafluoropropane accounts for 3-80% of the mixture (by volume), and the balance is carbon dioxide.

By way of example, in one embodiment of the present application, the fire extinguishing agent comprises: heptafluoropropane accounts for 25% by weight of the mixture, carbon dioxide accounts for 50% by weight of the mixture, perfluorohexanone accounts for 25% by weight of the mixture, and the fire extinguishing agent is stored at normal temperature under pressure.

By way of example, in one embodiment of the present application, the fire extinguishing agent comprises: perfluorohexanone solution with molar concentration over 95% and helium.

Can select the composition of fire extinguishing agent according to the different demands of the concrete application scene of intelligent thermal trigger extinguishing device, when improving fire extinguishing efficiency, avoid the fire extinguishing agent who puts to cause harmful effects to article.

Further, in an embodiment of the present application, an energy storage system is provided, which includes a plurality of energy storage modules; and according to any one of the embodiments of the present application, the temperature sensing nozzle at the liquid outlet of the fire extinguishing agent flowing pipeline extends to the inside of the energy storage module, or the outside is at a preset position within a preset distance from the outer surface of the energy storage system. In other embodiments of this application, also can extend the temperature-sensing shower nozzle of fire extinguishing agent flow line's liquid outlet department simultaneously to the inside of energy storage module and outside apart from the preset position in the energy storage system surface preset distance.

Further, in an embodiment of the present application, there is provided a vehicle comprising the intelligent thermally triggered fire extinguishing apparatus as described in any of the embodiments of the present application, the temperature sensing nozzle at the liquid outlet of the fire extinguishing agent flow line extends to the inside of the vehicle, or the outside to a predetermined position within a predetermined distance from the outer surface of the vehicle. In other embodiments of the present application, the temperature sensing nozzle at the outlet of the fire suppressant flow line may also be extended simultaneously to a predetermined position within a predetermined distance of the interior and exterior of the vehicle from the exterior surface of the energy storage system.

In one embodiment of the present application, the vehicle includes, but is not limited to, a two-wheeled vehicle, a three-wheeled vehicle, or a multi-wheeled vehicle, where an intelligent spot-on fire-extinguishing function is desired.

In an embodiment of this application, can set up perfluor hexanone solution in the inside of battery package casing for the battery module is immersed in perfluor hexanone solution, realizes the immersion fire extinguishing.

In an embodiment of this application, can set up perfluor hexanone solution in the inside of battery module for battery module immerses in perfluor hexanone solution, realizes the immersion fire extinguishing.

Further, in an embodiment of the present application, there is provided an intelligent heat-triggered fire extinguishing method, including:

step 202: the method comprises the steps that a real-time temperature value at a preset position is detected based on a temperature sensing nozzle, the temperature sensing nozzle is arranged at a liquid outlet of a fire extinguishing agent flow pipeline, a temperature sensing element is arranged inside the temperature sensing nozzle, the temperature sensing element blocks the liquid outlet of the fire extinguishing agent flow pipeline within a preset normal working temperature range, a liquid inlet of the fire extinguishing agent flow pipeline is communicated with the inside of a fire extinguishing agent storage unit, the liquid outlet of the fire extinguishing agent flow pipeline extends to the preset position, and the fire extinguishing agent storage unit is used for storing and supplying a fire extinguishing agent;

step 204: detecting a real-time fluid pressure value at an inlet of a fire extinguishing agent flowing pipeline based on a pressure balance valve, wherein the pressure balance valve is connected in series between a liquid outlet of a fire extinguishing agent storage unit and a liquid inlet of the fire extinguishing agent flowing pipeline, and fluid with a preset initial pressure value is arranged in the fire extinguishing agent flowing pipeline;

step 206: when the real-time temperature value belongs to a preset deformation temperature threshold range, enabling the fluid to be sprayed out through the temperature sensing spray head and reducing the real-time fluid pressure value based on deformation of the temperature sensing element, wherein the deformation comprises at least one of melting, softening or embrittlement;

step 208: when the real-time fluid pressure value is smaller than or equal to a preset liquid supply pressure threshold value, the liquid supply passage from the fire extinguishing agent storage unit to the fire extinguishing agent flowing pipeline is conducted on the basis of the pressure balance valve, so that the fire extinguishing agent in the fire extinguishing agent storage unit is sprayed out through the temperature sensing spray head to perform fixed-point and directional fire extinguishing.

For specific definition of the intelligent thermal-triggered fire extinguishing method in the above embodiments, see the definition of the intelligent thermal-triggered fire extinguishing device in the above, and will not be described in detail herein.

It should be understood that the steps described are not to be performed in the exact order recited, and that the steps may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps described may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or in alternation with other steps or at least some of the sub-steps or stages of other steps.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An intelligent thermally triggered fire suppression device, comprising:

wherein the pressure balancing valve is configured to:

2. The intelligent thermally triggered fire suppression device of claim 1, wherein said pressure balancing valve is further configured to:

3. The intelligent thermally triggered fire suppression device of claim 2, wherein said pressure equalization valve comprises:

a valve body having a hollow cylinder;

4. The intelligent thermally triggered fire extinguishing apparatus of any one of claims 1-3, wherein the temperature sensing element comprises at least one of fusible alloy, memory alloy, thermoplastic resin, heat sensitive sealant or thermoplastic glass.

5. The intelligent thermally triggered fire extinguishing apparatus of any one of claims 1-3, wherein the fluid is a fire extinguishing agent and the preset initial pressure value is greater than the preset liquid supply pressure threshold value.

6. The intelligent thermally triggered fire extinguishing apparatus of any one of claims 1-3, wherein the fluid comprises an inert gas and the preset initial pressure value is greater than the preset liquid supply pressure threshold.

7. The intelligent thermally triggered fire suppression device of claim 6, further comprising:

the overpressure relief valve is configured to:

8. The intelligent thermally triggered fire extinguishing apparatus of any one of claims 1-3, further comprising:

and the pressure sensor is used for detecting the real-time pressure value inside the fire extinguishing agent storage unit and providing the real-time pressure value to the micro control unit and/or the vehicle-mounted control center.

9. The intelligent thermally triggered fire suppression device of claim 8, further comprising:

and the alarm device is connected with the micro control unit and used for receiving the alarm control signal and executing a preset alarm action according to the alarm control signal.

10. The intelligent thermally triggered fire suppression apparatus of claim 9, wherein said micro control unit is configured to:

and when the real-time pressure value in the fire extinguishing agent storage unit is smaller than or equal to a preset leakage pressure threshold value, generating the alarm control signal.

11. The intelligent thermally triggered fire extinguishing apparatus of claim 9, wherein the preset alarm action includes generating at least one of alarm sound information, alarm image information, or alarm odor information.

12. The intelligent thermally triggered fire extinguishing apparatus of any one of claims 1-3, further comprising:

13. The intelligent thermally triggered fire extinguishing apparatus of any one of claims 1-3, further comprising:

14. The intelligent thermally triggered fire extinguishing apparatus of any one of claims 1-3, wherein the fire suppressant flow line comprises:

15. The intelligent thermally triggered fire extinguishing apparatus of claim 14, wherein at least one of the branch ducts comprises:

a first-stage branch pipe;

16. The intelligent thermal trigger fire extinguishing apparatus according to any one of claims 1 to 3, wherein the form of the fire extinguishing agent is at least one of a gas state, a liquid state, a gas-liquid mixed state, a solid-liquid mixed state or a gas-solid-liquid mixed state; the fire extinguishing agent includes at least one of hexafluoropropane, heptafluoropropane, perfluorohexanone, carbon dioxide, nitrogen, helium or argon.

17. A battery pack, comprising:

a plurality of battery modules; and

the intelligent thermal trigger fire extinguishing apparatus according to any one of claims 1 to 16, wherein the temperature sensing nozzle at the outlet of the fire extinguishing agent flow pipeline extends to a preset position inside and/or outside the battery module.

18. An energy storage system, comprising:

a plurality of energy storage modules; and

the intelligent thermal trigger fire extinguishing apparatus according to any one of claims 1-16, wherein the temperature sensing nozzle at the outlet of the fire extinguishing agent flowing pipeline extends to a preset position inside and/or outside the energy storage module.

19. A vehicle, characterized by comprising:

the intelligent thermal trigger fire extinguishing apparatus according to any one of claims 1 to 16, wherein the temperature sensing nozzle at the outlet of the fire extinguishing agent flow line extends to a preset position inside and/or outside the vehicle.

20. An intelligent heat-triggered fire extinguishing method is characterized by comprising the following steps:

when the real-time temperature value belongs to a preset deformation temperature threshold value, enabling the fluid to be sprayed out through the temperature sensing spray head and reducing the real-time fluid pressure value based on deformation of the temperature sensing element, wherein the deformation comprises at least one of melting, softening or embrittlement;