Electromagnetic intermittent spraying type lithium battery fire prevention and control device with single fire extinguishing agent bottle group

Abstract

The utility model relates to a single fire extinguishing agent bottle group electromagnetic intermittent discharge type lithium battery fire prevention and control device, which comprises a fire extinguishing agent bottle group with a container valve, an alarm control unit, a fire detector, a fire extinguishing unit and a controllable unit, and the alarm control unit is respectively in communication connection with the container valve, the fire detector, the fire extinguishing unit and the controllable unit. The controllable unit is provided with a plurality of input ends and a plurality of output ends, each input end is connected to a collecting pipe communicated with the container valve in parallel, the input ends are selectively communicated with the output ends, and the output ends are communicated with the fire extinguishing unit to form a fire extinguishing agent conveying channel; a statistical module is installed in the alarm control unit, the statistical module is connected with the controllable unit, and the controllable unit is controlled to be switched on and off at least twice within a set time to form an intermittent eruption control structure. By means of intermittent on-off of the controllable unit, it is ensured that the fire extinguishing agent bottle set erupts at least two times at intervals within the set time, and the potential safety hazard of fire reburning in a protection area is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of battery prevention and control devices for new energy vehicles, and in particular to an electromagnetic intermittent spraying lithium battery fire prevention and control device with a single fire extinguishing agent bottle group. Background Art

[0002] With the continuous advancement of science and technology, various new energy electric vehicles and electrochemical energy storage equipment and facilities have developed rapidly. Among them, charging and discharging equipment represented by lithium batteries have been widely used, resulting in a wide range of products such as lithium battery boxes and lithium battery cabinets for electric vehicles, high-speed railways, and ships, electric bicycle charging cabinets, battery exchange cabinets, new energy lithium battery energy storage cabins, UPS (Uninterruptible Power Supply) cabinets, lithium battery warehouses, etc. However, during the frequent charging and discharging process, lithium batteries are prone to thermal runaway due to overcharging, overvoltage, short circuit and environmental reasons, which can lead to fires and safety accidents.

[0003] Most fire prevention and control devices used in the prior art can only perform one-time spraying and extinguishing of the fire site of the lithium battery. Due to the characteristics of lithium battery fire and the structure of the lithium battery pack, after the first open flame of the fire in the protection area is successfully extinguished, the fire is prone to reignite for a second time within a certain period of time, causing economic losses and safety hazards to users. This problem needs to be solved urgently. Utility Model Content

[0004] In order to solve the above technical problems, the utility model discloses an electromagnetic intermittent spraying lithium battery fire prevention and control device for a single fire extinguishing agent bottle group, which includes a fire extinguishing agent bottle group with a container valve, an alarm control unit, a fire detector, a fire extinguishing unit and a controllable unit, wherein the alarm control unit is respectively communicatively connected to the container valve, the fire detector, the fire extinguishing unit and the controllable unit, the controllable unit has a plurality of input ends and a plurality of output ends, each of the input ends is connected in parallel to a collecting pipe connected to the container valve, the output end is connected to the fire extinguishing unit, and the input end is intermittently connected to the output end to form a fire extinguishing agent delivery passage; the alarm control unit has a statistical module for recording the number of times the fire extinguishing agent passes through the input end, the statistical module is communicatively connected to the controllable unit, and selectively sends an opening and closing signal to the controllable unit according to the number of times counted by the statistical module within a set time.

[0005] Specifically, the controllable unit includes a first controllable pipeline and multiple second controllable pipelines, the first controllable pipeline and the second controllable pipeline are respectively connected to the collecting pipe, and the outlet of the first controllable pipeline and the outlet of the second controllable pipeline are both connected to the fire extinguishing unit; the first controllable pipeline and the second controllable pipeline are respectively installed with a first solenoid valve and a second solenoid valve, and the first controllable pipeline and the second controllable pipeline can be opened selectively.

[0006] Specifically, there is also a fire extinguishing agent distribution chamber between the controllable unit and the fire extinguishing unit, the fire extinguishing unit includes a plurality of fire extinguishing pipelines, the fire extinguishing agent distribution chamber includes a plurality of feed ports and a plurality of outlet ports, the plurality of feed ports are arranged on one side of the fire extinguishing agent distribution chamber, and are respectively connected to the output ends of the first controllable pipeline and the second controllable pipeline, the outlet ports are arranged on the other side of the distribution chamber, and are respectively connected to the fire extinguishing pipelines, and the number of the feed ports is greater than the number of the outlet ports.

[0007] Specifically, the fire extinguishing agent distribution chamber includes a one-way valve, the number of the one-way valves is adapted to the number of the fire extinguishing pipelines, each of the fire extinguishing pipelines is respectively connected to the second controllable pipeline, or each of the fire extinguishing pipelines is connected to the output end of the first controllable pipeline.

[0008] Specifically, a start signal feedback device is installed at the outlet of each one-way valve, and the start signal feedback device is connected to the alarm control unit. The start signal feedback device is configured to receive the on / off signal of the one-way valve and feed back the on / off signal to the alarm control unit.

[0009] Specifically, the statistical module includes one or more of the spraying interval time, the single spraying time and the temperature of the fire extinguishing agent bottle group according to the fire extinguishing agent content in the fire extinguishing agent bottle group.

[0010] Specifically, it also includes a manual starter, which is connected to the container valve and the first solenoid valve to form an independent fire extinguishing delivery pipeline.

[0011] Specifically, it also includes a temperature sensor installed on the fire extinguishing agent bottle group, and the temperature sensor is connected to the alarm control unit and the controllable unit so as to transmit the real-time monitored fire extinguishing agent operating temperature signal to the alarm control unit, and the alarm control unit is configured to adjust the fire extinguishing agent output of the fire extinguishing agent bottle group according to the fire extinguishing agent operating temperature sensed in real time by the temperature sensor.

[0012] Specifically, the fire detector is configured as a carbon monoxide, smoke and temperature composite fire detector, or as a carbon monoxide, smoke, temperature and pressure composite fire detector.

[0013] Advantages

[0014] The utility model controls the input end and the output end of the controllable unit to be intermittently connected through the alarm control unit, and can intermittently spray the fire extinguishing agent to the protection area at least twice, so as to quickly extinguish the fire of the lithium battery and cool it down at the same time, continuously suppress the temperature rise of the lithium battery block, prevent the protection area from re-igniting a fire in the interval time, eliminate safety hazards, and improve safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the electromagnetic intermittent spraying lithium battery fire prevention and control device of the utility model;

[0016] Figure 2 It is a partial enlarged view of the utility model.

[0017] legend:

[0018] 1. Fire extinguishing agent bottle group; 11. Container valve; 12. Leakage signal feedback device; 2. Alarm control unit; 21. Manual starter; 22. Fire alarm controller; 3. Controllable unit; 31. First controllable pipeline; 32. Second controllable pipeline; 33. First solenoid valve; 34. Second solenoid valve; 35. Input end; 36. Output end; 41. Connecting pipeline; 42. Collecting pipe; 5. Fire extinguishing agent distribution chamber; 51. One-way valve; 52. Feed inlet; 53. Discharge outlet; 6. Fire extinguishing unit; 61. Fire extinguishing pipeline; 62. Start signal feedback device; 63. Nozzle; 7. Control circuit; 8. Temperature sensor; 9. Fire detector. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the terms "first" and "second" are used to distinguish different objects rather than to describe a specific order.

[0021] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0022] The present invention will be further described below in conjunction with the embodiments, but is not limited to the contents of the specification.

[0023] The utility model relates to an electromagnetic intermittent spraying lithium battery fire prevention and control device with a single fire extinguishing agent bottle group 1, which comprises a fire extinguishing agent bottle group 1 with a container valve 11, an alarm control unit 2, a fire detector 9, a fire extinguishing unit 6 and a controllable unit 3 which is communicatively connected to the alarm control unit 2, wherein the alarm control unit 2 is communicatively connected to the container valve 11, the fire detector 9 and the fire extinguishing unit 6 respectively, the controllable unit 3 has a plurality of input terminals 35 and a plurality of output terminals 36, each input terminal 35 is connected in parallel to a collecting pipe 42 which is communicated with the container valve 11, and the output terminal 36 is communicated with the fire extinguishing unit 6 to form a fire extinguishing agent delivery pipeline; the alarm control unit 2 has a statistical module which records the number of times the fire extinguishing agent passes through the input terminal 35, the statistical module is communicatively connected to the controllable unit 3, and selectively sends an opening and closing signal to the controllable unit 3 according to the number of times counted by the statistical module within a set time.

[0024] In this embodiment, the alarm control unit 2 adopts a controller of model LD5508KZ, and the controller has multiple parallel ports, and multiple independent statistical modules can be plugged in at the same time. The statistical module usually has a preset program statistics and is turned on and off. The statistical module may include one or more combinations of the number of fire extinguishing agent spraying, the spraying interval time, the single spraying time and the temperature parameters of the bottle group during operation. For example, the opening and closing parameters of the statistical module can be one or more combinations of the fire extinguishing agent spraying number statistics module, the spraying interval time statistics module, and the single spraying time statistics module. For example, in this embodiment, the opening and closing parameters of the module can be 2 times. After the statistical module counts that the fire extinguishing agent has sprayed once, it controls the controllable pipeline to open again within the set time, thereby realizing intermittent spraying of the fire extinguishing agent. The container valve is closed after two sprayings. In this way, fire extinguishing and continuous cooling can be implemented in the protection area, ensuring that there are no safety hazards in the protection area after the spraying, and suppressing the fire to prevent re-ignition.

[0025] The statistical module can directly and selectively open and close the controllable unit 3 according to the number of statistics. At this time, the container valve 11 of the fire extinguishing agent bottle group 1 can be in an open state during the operation stage of the device until the controllable unit 3 is closed, and the container valve 11 is closed accordingly. Alternatively, it can be set to be controlled by the alarm control unit 2. The alarm control unit 2 can control the on and off of the controllable unit 3 according to the actual situation of the fire. For example, the alarm control unit 2 controls the on and off of the controllable unit according to a program with preset on and off time intervals and on and off times. At this time, the container valve 11 is synchronously opened and closed with the controllable unit 3, which is easy to operate, ensuring that multiple protection areas can be extinguished and cooled in time as needed, reducing the economic losses of users.

[0026] In order to ensure that the protective device can extinguish fire in a timely and accurate manner, the protective device is provided with a controller for fire extinguishing control, and the controller can be combined with the protective device into a separate module, or the controller of the protective device can also be integrated into the control computer of the vehicle. The protective device is provided with fire detectors 9 according to the locations where lithium battery fires often occur, and each fire detector 9 is provided with a corresponding fire protection zone. For example, the number of protection zones is set to three, and correspondingly, the number of fire detectors 9 is also three. Moreover, when the fire detector 9 in the protection zone detects a fire in the target protection zone, or when the lithium battery has abnormal high temperature, the alarm control unit 2 receives the corresponding signal, controls the controllable unit 3 to be intermittently turned on and off, and timely controls the fire extinguishing agent bottle group 1 to spray intermittently within the set time for the target protection zone, so as to achieve the effect of fire extinguishing and cooling.

[0027] In addition, the statistical module is a separate module, and a plurality of plug-in ports are provided on the alarm control unit 2. The statistical module can also be provided with multiple modules, and corresponding modules can be added or deleted according to the needs of the user, thereby reducing the difficulty of operation. Moreover, when a module is damaged, targeted repair or replacement can be carried out to ensure that the protective device can be used in time, shorten the maintenance time, and reduce the maintenance cost.

[0028] The container valve 11 is an electromagnetic container valve 11, which adopts a pressure differential self-sealing container valve structure. The driving device is an electromagnetic driving device. After the valve is actuated and the ejector pin punctures the diaphragm, the sealing plug automatically seals the punctured opening of the diaphragm. The container valve 11 does not leak, so that the fire extinguishing agent will not leak out through the puncture hole, thereby ensuring successful fire extinguishing.

[0029] In addition, in order to reduce the difficulty of installing the protective device, the present embodiment configures the connecting pipeline 41 and the fire extinguishing pipeline 61 as bendable pipes with high strength and flexibility, and the material of the pipe is preferably copper pipe, which can also adapt to various installation environments and installation conditions. The shape of the pipe is not restricted, which is convenient for installation layout, and quick-insert or quick-twist connectors are used at the connection points with each interface. This installation method is simple, firm, and not easy to fall off, which improves the installation efficiency and avoids the normal operation of the prevention and control device due to damage to the connecting pipeline 41.

[0030] The controllable unit 3 includes a first controllable pipeline 31 and multiple second controllable pipelines 32. The inlet of the first controllable pipeline 31 and the inlet of the second controllable pipeline 32 can be connected to the collecting pipe 42 respectively, and the collecting pipe 42 can be made of copper material, or can also be made of aluminum alloy. For example, the fire extinguishing agent is diverted through the connecting pipeline 41 after the collecting pipe 42, and is connected to the connecting pipeline 41 at the collecting pipe 42. The outlet of the first controllable pipeline 31 and the outlet of the second controllable pipeline 32 are both connected to the fire extinguishing unit 6; the first solenoid valve 33 and the second solenoid valve 34 are respectively installed on the first controllable pipeline 31 and the second controllable pipeline 32, and the first controllable pipeline 31 and the second controllable pipeline 32 can be opened selectively.

[0031] like Figure 1 As shown, the first controllable pipeline 31 is the main pipeline, and correspondingly, the first solenoid valve 33 is the solenoid main control valve, and the second controllable pipeline 32 controls the corresponding protection areas respectively, that is, the second controllable pipeline 32 is a branch, and the second solenoid valve 34 is an solenoid selection valve, and both adopt normally closed pilot solenoid valves, which are opened when powered on and closed when powered off. By controlling the power-on time, the purpose of controlling the fire extinguishing spraying dosage is achieved.

[0032] In the present embodiment, when the fire alarm controller 22 fails and cannot be used normally, manual control can also be performed, that is, the manual starter 21 is controlled. The manual starter 21 is arranged in parallel with the fire alarm controller 22, and is connected to the container valve 11 and the first controllable pipeline 31 through the control line 7. The manual starter 21 is started to control the opening of the first solenoid valve 33. The fire extinguishing agent enters from the fire extinguishing agent bottle group 1 through the first solenoid valve 33 and enters all output ports through the one-way valve core arranged in the valve block, passes through the fire extinguishing pipeline 61 connected to the output port, and is ejected from the nozzle 63 in the protection zone at the same time. In addition, according to the needs of fire extinguishing, the opening interval and the number of on and off of the manual starter 21 can be manually controlled until the temperature of the surface of the lithium battery in the protection zone reaches the normal value, and then the prevention and control device is turned off, and the fire extinguishing agent is replenished and the existing faults are repaired in time to ensure that the fire extinguishing agent bottle group 1 can still be used normally after this fire extinguishing to eliminate safety hazards.

[0033] It should be noted that the manual starter 21 can be set to one. When a fire occurs in the protection zone and the naked eye cannot accurately determine the specific situation in the protection zone and emergency fire extinguishing is required, the manual start button on the manual starter 21 is pressed, and the fire extinguishing agent bottle group 1 and the first solenoid valve 33 are energized and started. The gaseous or solid fire extinguishing agent stored in the fire extinguishing agent bottle group 1 is sprayed from the outlet of the container valve 11 through the connecting pipeline 41, the collecting pipe 42, the first solenoid valve 33, the one-way valve 51, the fire extinguishing agent pipeline, and the nozzle 63 into all the protection zones. At this time, each protection zone can carry out indiscriminate fire extinguishing, and implement fire extinguishing and cooling according to the set spraying procedure.

[0034] As an alternative to the present application, a plurality of manual starters 21 may be provided, and the plurality of manual starters 21 correspond to different protection zones respectively. When a fire occurs in a protection zone and it is manually confirmed that the fire occurred in a certain protection zone and emergency fire extinguishing is required, the manual start button corresponding to the protection zone is pressed, and the prevention and control device will start the fire extinguishing procedure and implement fire extinguishing and cooling in the protection zone where the fire occurred.

[0035] A fire extinguishing agent distribution chamber 55 is also included between the controllable unit 3 and the fire extinguishing unit 6. The fire extinguishing agent distribution chamber 55 includes a plurality of feed ports 52 and a plurality of discharge ports 53. The plurality of feed ports 52 are distributed at the top of the distribution chamber 5 and are respectively connected to the output ends of the first controllable pipeline 31 and the second controllable pipeline 32. The discharge ports 53 are equidistantly arranged at the bottom of the distribution chamber 5 and are respectively connected to the fire extinguishing pipelines 61. The number of feed ports 52 is greater than the number of discharge ports 53.

[0036] At this time, the fire extinguishing agent distribution chamber 5 can be formed by a combination of multiple one-way valves 51, or it can also be a one-way valve row structure. Since the fire extinguishing agent distribution chamber 5 is arranged between the controllable unit 3 and the fire extinguishing unit 6, that is, the fire extinguishing agent distribution chamber 5 is arranged on the passage for conveying the fire extinguishing agent, at this time, the fire extinguishing agent distribution chamber 5 can be placed vertically in the height direction, or it can also be placed in the horizontal direction. The installation position can be adjusted according to the needs of the user. For example, it is placed in the horizontal direction, and the feed port 52 is located above the discharge port 53, that is, the first controllable pipeline 31 The second controllable pipeline 32 is connected to the top of the fire extinguishing agent distribution chamber 5 through the feed port 52, and the discharge port 53 at the bottom is connected to the fire extinguishing pipeline 61 and corresponds one to one. When the first controllable pipeline 31 or the second controllable pipeline 32 is opened, the fire extinguishing agent automatically flows to the fire extinguishing agent distribution chamber 5 for storage due to its own gravity, and then flows to the target protection area. At this time, a control valve is provided at the bottom of the fire extinguishing agent distribution chamber 5, or a control valve may also be provided on the fire extinguishing pipeline 61 to control the sprinkler in the target protection area to intermittently spray the fire extinguishing agent according to the set number of times.

[0037] In the present embodiment, the fire extinguishing agent distribution chamber 5 is configured as a one-way valve row structure, and a one-way valve 51 connected to the fire extinguishing pipeline 61 is arranged at the outlet position (bottom) of the one-way valve row structure, and a one-way valve core is arranged in the one-way valve 51. At this time, the number of one-way valves 51, the second solenoid valves 34 and the protection zones is equal and one-to-one corresponding. The fire extinguishing agent entering from the second solenoid valve 34 directly passes through the straight-through hole inside the valve block, passes through the fire extinguishing pipeline 61 connected to the outlet, and is sprayed out from the nozzle 63 of each protection zone. On the basis of ensuring that each protection zone can be extinguished or cooled at the same time, the operation is simple and the production cost is reduced.

[0038] A start signal feedback device 62 is installed at the outlet of each one-way valve 51 . The start signal feedback device 62 is connected to the alarm control unit 2 . The start signal feedback device 62 is configured to receive the on / off signal of the one-way valve 51 and feed the on / off signal back to the alarm control unit 2 .

[0039] Specifically, the start signal feedback device 62 is automatically opened when the fire extinguishing agent flows through the one-way valve 51, and sends the opening signal to the fire alarm controller 22. At this time, the fire alarm controller 22 controls the first controllable pipeline 31 or the second controllable pipeline 32 to be intermittently opened and closed to ensure that the nozzle 63 in the protection area can spray intermittently to achieve the purpose of fire extinguishing or cooling.

[0040] The number of start signal feedback devices 62 is equal to the number of second solenoid valves 34 and protection zones and is in a one-to-one correspondence. The start signal feedback device 62 is a self-locking diaphragm pressure structure, and its working pressure is set to 4.2MPa. At normal pressure or pressure <0.3MPa, the contacts are disconnected. When the pressure reaches 0.3MPa, the contacts are connected. After the contacts are connected, they have a self-locking function. The working voltage range is 110-240V AC, the current range is 3-6A, and a reset button is provided. The start signal that is self-locked after the action can and can only be manually reset, which not only ensures the safe transmission of the start signal during a fire, but also can be manually released after the fire is successfully extinguished.

[0041] In addition, the protective device also includes a leakage signal feedback device 12, which is installed on the outlet of the container valve 11, or can also be installed on the fire extinguishing pipeline 61. The leakage signal feedback device 12 is connected to the alarm control unit 2 through the control line 7. In this embodiment, the leakage signal feedback device 12 is installed on the container valve 11 to monitor whether there is a leak in the container valve 11, that is, only when a leak occurs, the leakage signal feedback device 12 is automatically started, and the leakage signal is promptly fed back to the fire alarm controller 22, and a corresponding alarm signal is issued to remind the user to perform maintenance in time to ensure that the container valve 11 is in a normal state, and to ensure that the fire extinguishing agent bottle group 1 can accurately calculate the amount of fire extinguishing agent sprayed when extinguishing a fire in the event of a fire.

[0042] In this embodiment, the leakage signal feedback device 12 is a diaphragm pressure structure with reliable sealing, accurate operation, and a built-in working status indicator light. In addition, the working status is displayed on the display screen of the new energy vehicle, and whether the container valve 11 is leaking can be detected in real time. The user can be notified in time when a leak occurs, thereby improving the safety performance of the new energy vehicle.

[0043] The prevention and control device also includes a temperature sensor 8 installed on the fire extinguishing agent bottle group 1. The temperature sensor 8 is communicatively connected to the alarm control unit 2 and the controllable unit 3. At this time, the temperature sensor 8 is part of the statistical module. The statistical module is preset with a program for measuring the temperature and the output of the fire extinguishing agent, so as to transmit the real-time monitored fire extinguishing agent operating temperature signal to the alarm control unit 2. The alarm control unit 2 controls the container valve 11 to output the fire extinguishing agent according to the set output amount.

[0044] The temperature sensor 8 adopts a patch thermocouple, which is simple and convenient to install and has a wide temperature measurement range. It can transmit the working temperature of the fire extinguishing agent bottle group 1 to the alarm controller, calculate the spraying time of the required amount of fire extinguishing agent at the corresponding temperature, accurately control the single fire extinguishing agent spraying dosage, and improve the control accuracy of the fire extinguishing agent output.

[0045] The fire detector 9 is a composite fire detector 9, for example, it can be a carbon monoxide, smoke and temperature composite fire detector 9, or it can be a carbon monoxide, smoke, temperature and pressure composite fire detector 9, etc. It can be seen that the fire detector 9 in the present application has a high degree of integration and is easy to install. It is suitable for installation in various complex environments and can be selected according to the place of use and user requirements.

[0046] When a fire occurs, the fire alarm controller 22 receives the fire signal from the fire detector 9 and can send out an early warning signal according to the set program. For example, when the fire detector 9 detects that the carbon monoxide concentration reaches 190ppm±50ppm or the surface temperature of the lithium battery reaches 60℃, the fire alarm controller 22 sends out a fire warning signal. When the fire develops further, the fire alarm is triggered and the fire extinguishing program is automatically started. For example, when the fire detector 9 in the protection zone detects that the temperature reaches 80℃±5℃, the fire detector 9 sends a fire alarm signal to the fire alarm controller 22. At the same time, the fire alarm controller 22 controls the container valve 11 of the fire extinguishing agent bottle group 1 to start, and opens the second electromagnetic valve 34 of the protection zone corresponding to the fire. The fire extinguishing agent stored in the fire extinguishing agent bottle group 1 is sprayed from the outlet of the container valve 11 through the connecting pipeline 41, the manifold 42, the second electromagnetic valve 34, the one-way valve 51, the fire extinguishing pipeline 61, and the nozzle 63 to the protection zone where the fire occurs, and the fire extinguishing and cooling are implemented according to the set spraying program.

[0047] When the container valve 11 is opened, the fire alarm controller 22 intermittently energizes the second solenoid valve 34 2 to 3 times according to a preset program. The duration of each energization is calculated by the data collected in real time by the temperature sensor 8, and the amount of fire extinguishing agent sprayed each time is controlled to achieve the purpose of rapid fire extinguishing, continuous temperature reduction, and fire suppression to prevent re-ignition. The specific control procedure is as follows:

[0048] First start: spray 33-37% of the filling weight of the fire extinguishing agent to quickly extinguish the fire.

[0049] Second start: spray about 33% of the weight of the fire extinguishing agent to continuously cool down and suppress the fire to prevent it from re-igniting. After the first start, the second start is carried out after an interval of about 4 minutes.

[0050] The third start: spray the remaining fire extinguishing agent to continue cooling and further suppress the fire to prevent it from re-igniting. After the second start, the third start is carried out after an interval of about 4 minutes.

[0051] Alternatively, the control program can also be:

[0052] First start: spray about 55% of the charged weight of fire extinguishing agent to quickly extinguish the fire.

[0053] Second start: spray the remaining fire extinguishing agent to continue cooling, suppress the fire and prevent it from re-igniting. After the first start, start the second time about 5 minutes after the power is turned on.

[0054] When leakage of fire extinguishing agent in the fire extinguishing agent bottle group 1 is detected, the leakage signal feedback device 12 feeds back the leakage signal to the alarm control unit 2. After receiving the leakage signal, the alarm control unit 2 sends out an alarm signal to remind the user that the fire extinguishing agent bottle group 1 is leaking. In addition, the alarm of the leakage signal can be set to a different signal from the fire alarm signal to facilitate timely determination of the signal type. For example, the leakage alarm signal can be a light signal or a sound signal, or it can be directly fed back to the mobile terminal; until the leakage point of the fire extinguishing agent bottle group 1 is successfully repaired, the leakage signal feedback device 12 is closed.

[0055] It should be noted that when the leakage signal feedback device 12 is started, the first solenoid valve 33 and the second solenoid valve 34 are usually in a closed state. When the device starts to spray fire extinguishing, the start signal feedback device 62 is activated, and the fire alarm control unit 2 sends out an alarm signal after receiving the start signal.

[0056] In order to improve the protection of the device, the main components of the prevention and control device of the utility model can be integrated in a box according to the installation site and user needs. For example, the fire extinguishing agent bottle group 1, the connecting pipeline 41, the collecting pipe 42, the first solenoid valve 33, the second solenoid valve 34, the one-way valve 51, the alarm control unit 2 and the temperature sensor 8 are integrated in a box, and when installing the fire extinguishing agent bottle group 1, the bottle group should be firmly fixed to the bottom plate of the box with a clamp; during assembly, the parts fixed on the outer shell of the box should be equipped with sealing gaskets (rings). After the whole box is assembled, the waterproof level of the box should reach IP67. At this time, the prevention and control device in the box can be waterproof and dustproof, saving space, or the prevention and control device can be installed and disassembled as a module, and the corresponding installation port is exposed, which saves installation time and also meets the protection level requirements of lithium batteries of new energy vehicles.

[0057] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A single fire extinguishing agent bottle group electromagnetic intermittent spraying lithium battery fire prevention and control device, characterized in that: It comprises a fire extinguishing agent bottle group (1) having a container valve (11), an alarm control unit (2), a fire detector (9), a fire extinguishing unit (6) and a controllable unit (3), wherein the alarm control unit (2) is respectively connected to the container valve (11), the fire detector (9), the fire extinguishing unit (6) and the controllable unit (3), wherein the controllable unit (3) has a plurality of input ends (35) and a plurality of output ends (36), wherein each of the input ends is connected in parallel to a manifold (42) connected to the container valve (11), the output end is connected to the fire extinguishing unit (6), and the input end (35) is intermittently connected to the output end (36) to form a fire extinguishing agent delivery passage; The alarm control unit (2) has a statistical module for recording the number of times the fire extinguishing agent passes through the input terminal (35); the statistical module is in communication connection with the controllable unit (3) and selectively sends an opening and closing signal to the controllable unit (3) according to the number of times counted by the statistical module within a set time.

2. The electromagnetic intermittent spraying lithium battery fire prevention and control device with a single fire extinguishing agent bottle group according to claim 1 is characterized in that: The controllable unit (3) comprises a first controllable pipeline (31) and a plurality of second controllable pipelines (32); the first controllable pipeline (31) and the second controllable pipeline (32) are respectively connected to the collecting pipe (42); the outlet of the first controllable pipeline (31) and the outlet of the second controllable pipeline (32) are both connected to the fire extinguishing unit (6); the first controllable pipeline (31) and the second controllable pipeline (32) are respectively installed with a first solenoid valve (33) and a second solenoid valve (34); the first controllable pipeline (31) and the second controllable pipeline (32) are selectively opened.

3. The electromagnetic intermittent spraying lithium battery fire prevention and control device with a single fire extinguishing agent bottle group according to claim 2 is characterized in that: A fire extinguishing agent distribution chamber (5) is also included between the controllable unit (3) and the fire extinguishing unit (6); the fire extinguishing unit (6) includes a plurality of fire extinguishing pipelines (61); the fire extinguishing agent distribution chamber (5) includes a plurality of feed ports (52) and a plurality of discharge ports (53); the plurality of feed ports are arranged on one side of the fire extinguishing agent distribution chamber (5) and are respectively connected to the output ends of the first controllable pipeline (31) and the second controllable pipeline (32); the discharge ports (53) are arranged at the bottom of the distribution chamber (5) and are respectively connected to the fire extinguishing pipelines (61); the number of the feed ports (52) is greater than the number of the discharge ports (53).

4. The electromagnetic intermittent spraying lithium battery fire prevention and control device with a single fire extinguishing agent bottle group according to claim 3 is characterized in that: The fire extinguishing agent distribution chamber (5) comprises a one-way valve (51), the number of the one-way valves (51) being adapted to the number of the fire extinguishing pipelines, each of the fire extinguishing pipelines (61) being respectively connected to the second controllable pipeline (32), or each of the fire extinguishing pipelines (61) being connected to the output end of the first controllable pipeline (31).

5. The electromagnetic intermittent spraying lithium battery fire prevention and control device with a single fire extinguishing agent bottle group according to claim 4 is characterized in that: A start signal feedback device (62) is installed at the outlet of each one-way valve (51), and the start signal feedback device (62) is connected to the alarm control unit (2). The start signal feedback device (62) is configured to receive an on / off signal of the one-way valve (51) and feed the on / off signal back to the alarm control unit (2).

6. The electromagnetic intermittent spraying lithium battery fire prevention and control device with a single fire extinguishing agent bottle group according to claim 1 is characterized in that: The statistical module includes one or more of a module for counting the interval time of spraying fire extinguishing agent, a module for counting the single spraying time, and the temperature of the fire extinguishing agent bottle group.

7. The electromagnetic intermittent spraying lithium battery fire prevention and control device with a single fire extinguishing agent bottle group according to claim 2 is characterized in that: It also includes a manual starter (21), which is connected to the container valve (11) and the first electromagnetic valve (33) to form an independent fire extinguishing delivery pipeline.

8. The electromagnetic intermittent spraying lithium battery fire prevention and control device with a single fire extinguishing agent bottle group according to claim 1 is characterized in that: The invention also comprises a temperature sensor (8) installed on the fire extinguishing agent bottle group (1), wherein the temperature sensor (8) is connected to the alarm control unit (2) and the controllable unit (3) so as to transmit a real-time monitored fire extinguishing agent operating temperature signal to the alarm control unit (2), and the alarm control unit (2) is configured to adjust the fire extinguishing agent output of the fire extinguishing agent bottle group (1) according to the fire extinguishing agent operating temperature sensed in real time by the temperature sensor (8).

9. The electromagnetic intermittent spraying lithium battery fire prevention and control device with a single fire extinguishing agent bottle group according to claim 1 is characterized in that: The fire detector is configured as a carbon monoxide, smoke and temperature composite fire detector, or as a carbon monoxide, smoke, temperature and pressure composite fire detector.

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