Integrated detection sprinkler head

Abstract

Disclosed in the present invention is an integrated detection sprinkler head. A sprinkler head body and a detector are integrally arranged, and are sealingly connected to a battery case in a threaded manner and extend into the battery case. By means of the solution, in the present invention, a detection sensor and a circuit board are integrated on the sprinkler head, and there is no need to mount the sprinkler head and a detection device separately, nor to change an original battery case structure, such that the cost is lower; and the integrated sprinkler head is inserted via an originally reserved sprinkler-head mounting hole of the battery case so as to mount the integrated sprinkler head, or is removed via the originally reserved sprinkler-head mounting hole of the battery case so as to repair the integrated sprinkler head, without the need to open the battery case, thus making mounting, inspection and repair, and maintenance convenient.

Description

Integrated detection nozzle Technical Field

[0001] This invention relates to a fire protection system, specifically a fire protection device for lithium battery boxes. Background Technology

[0002] Energy storage power stations or power battery packs are composed of a large number of battery packs. After long-term and frequent use, high-energy material energy storage batteries will continue to age, and the system safety performance will decline. When short circuits, thermal runaway, high temperatures, external pressure, punctures, etc. occur inside lithium-ion batteries or supercapacitors, the thermal expansion of the battery or capacitor can easily cause explosions and fires. On May 15, 2024, a fire broke out at the MESA gateway energy storage power station in California, USA, which burned for six days and was still not extinguished. It may take several more weeks to put out. Existing technologies have designed separate detection and extinguishing devices for each individual battery pack, such as Chinese patent CN 213642915 U. However, for large energy storage power stations, the number of battery packs is enormous, and the batteries and fire suppression systems are manufactured separately by different companies. After the power station is put into use, the battery packs are sealed and filled with inert gas, making it impossible to inspect them at any time. This places higher demands on the cost and reliability of the fire suppression system. The current split design, which separates sensing and fire suppression, is costly and requires two installation ports on the battery box, increasing the difficulty of sealing the battery box. In addition, existing solutions use open nozzles, which, after long-term use, may have the potential to fail to open due to components such as adhesion or electronic device malfunction. These loopholes cannot be solved by existing technologies. Summary of the Invention

[0003] The purpose of this invention is to provide a low-cost, high-reliability integrated fire detection and extinguishing device for energy storage lithium battery packs.

[0004] To achieve the above objectives, the present invention provides an integrated detection nozzle, comprising a control system, a detector, and a nozzle. The nozzle is mounted on a nozzle mounting base, which is sealed and screwed onto a mounting hole in a battery housing. The nozzle extends into the battery housing. The nozzle mounting base is characterized by having two supports extending into the battery housing. Each support has an inwardly bent baffle at its end. A movable seat for connecting the detector is movably engaged within the baffle of the support. The nozzle has a plug, and a temperature-sensitive thermal device is sandwiched between the plug and the movable seat.

[0005] The temperature-sensitive thermistor is one of the following: temperature-sensitive glass ball, molten metal, or shape memory alloy.

[0006] The detector PCB circuit board is fixed on the movable base. The circuit board is equipped with a temperature sensor, a VOC sensor and a CO sensor. A protective cover is provided on the outside of the above sensors.

[0007] After adopting the above solution, the present invention has the following advantages: 1. Integration: The detection sensor and circuit board are integrated into the nozzle, eliminating the need to install the nozzle and detection device separately, and also eliminating the need to change the original battery box structure, resulting in lower costs; 2. The integrated nozzle is inserted for installation or removed for maintenance from the outside of the nozzle mounting hole originally reserved in the battery box, without the need to open the battery box, making installation and maintenance more convenient; 3. The detection sensor and circuit board are located in front of the nozzle. When spraying is required, the detection sensor and circuit board fall from the front of the nozzle without affecting the spray angle of the nozzle. Attached Figure Description

[0008] Figure 1 is a schematic diagram of the structure of the present invention;

[0009] Figure 2. Side view of the structure of the present invention;

[0010] Figure 3 is a schematic diagram of the nozzle mounting base structure of the present invention;

[0011] Figure 4 is a cross-sectional view of the structure of the present invention;

[0012] Figure 5 is a schematic diagram of the working state structure of the present invention;

[0013] Figure 6 is a cross-sectional view of the main body structure of the present invention in its working state.

[0014] Label Explanation:

[0015] 1. Nozzle mounting base; 11. Bracket; 12. Mounting screw hole; 13. Signal line through hole; 111. Bracket baffle; 2. Nozzle; 3. Temperature sensing glass bulb; 31. Temperature sensing glass bulb heating wire control line; 4. Detector PCB board; 41. Signal transmission line; 5. Detector protective cover; 51. Detector; 6. Movable base; 7. Nozzle plug; 8. Nozzle pipe joint; 81. Pipe protective plug; 9. Circuit connector. Embodiments of the present invention

[0016] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0017] Please refer to Figures 1, 2, and 4. The integrated detection nozzle of the present invention consists of a nozzle mounting base 1, a bracket 11, a nozzle 2, a temperature-sensing glass ball 3, a detector PCB board 4, a detector 51, and a movable seat 6. As shown in Figure 2, the nozzle mounting base 1 is provided with four mounting screw holes 12, which can be used to seal the nozzle mounting base 1 in the nozzle mounting hole of the battery box.

[0018] As shown in Figures 1, 2, and 4, two metal brackets 11 extending into the battery compartment are installed on the nozzle mounting base 1. The ends of the brackets 11 are equipped with elastic baffles 111 bent inwards at 90°. The nozzle of the nozzle 2 is sealed against an "H"-shaped nozzle plug 7, and the thin end of the temperature-sensing glass bulb 3 is pressed against the opening of the nozzle plug 7. The detector 51 is mounted on the detector PCB board 4, and a protective cover 5 is provided outside the detector 51. The signal transmission line 41 of the detector PCB board 4 is connected to the control system via a signal line through-hole 13 (sealed connection) on the nozzle mounting base 1, connected to the circuit connector 9. The detector PCB board 4 is fixed to a movable base 6, which is engaged with the elastic baffles 111 of the brackets 11 and the thick end of the temperature-sensing glass bulb 3.

[0019] During installation, insert the bracket of the integrated detection sprinkler head and the front detector into the sprinkler head mounting hole of the battery box, and use screws to seal and screw the sprinkler head mounting base 1 to the side of the battery box. The two brackets are set horizontally. Open the pipe protection plug 81 and connect the fire pipe to the sprinkler head pipe joint 8.

[0020] During operation, detector 51 transmits data to the control system. Under normal conditions, the nozzle of nozzle 2 is blocked by nozzle plug 7 and cannot spray. The temperature-sensing glass bulb 3 is a JOB type F5, with an operating temperature of 68±3℃. When the temperature inside the battery box reaches the operating temperature of the temperature-sensing glass bulb, the glass bulb will shatter. A heating coil is installed on the temperature-sensing glass bulb 3, and the heating coil is connected to the detector PCB board 4 through the temperature-sensing glass bulb heating wire control line 31, as shown in Figures 5 and 6. When the temperature-sensing glass bulb shatters, the movable seat 6, detector PCB board 4, and sensor 5 fall off under the action of gravity, and the nozzle plug 7 falls off under the action of pipeline pressure, and the nozzle begins to spray the agent.

[0021] The temperature-sensing glass ball of this invention can shatter in the following ways: 1. When the battery box experiences thermal runaway and reaches the set temperature of the temperature-sensing glass ball, the glass ball automatically breaks; 2. When the temperature and gas detected by the sensor reach the set value, the control circuit activates the heating wire to heat the temperature-sensing glass ball, causing it to break automatically; 3. When the battery BMS system detects battery thermal runaway and needs to activate the fire sprinkler, the control circuit activates the heating wire to heat the temperature-sensing glass ball, causing it to break automatically.

[0022] The temperature-sensing glass ball of this invention can also be made of fused metal or shape memory alloy. When the temperature reaches the metal deformation temperature, the metal melts or deforms to change the pressure on the nozzle seal. The pressure of the extinguishing agent forces the nozzle seal open to achieve spraying.

[0023] The sensor of this invention is integrated into a bracket directly in front of the nozzle. The elastic baffle of the bracket presses the movable seat, the temperature-sensing glass ball, and the nozzle plug onto the nozzle in sequence. After the temperature-sensing glass ball shatters, the sensor falls downward under the action of gravity and no longer blocks the nozzle. Since the temperature-sensing glass ball is no longer pressing against it, the nozzle plug falls off under the pressure of the pipeline.

[0024] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent shape or structural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An integrated detection nozzle, comprising a control system, a detector and a nozzle, the nozzle is arranged on a nozzle mounting seat, the nozzle mounting seat is sealed and screwed on the mounting hole of the battery box body, and the nozzle nozzle is arranged in the battery box, characterized in that: The nozzle mounting seat is provided with two supports arranged in the battery box, the end of the support is provided with an inwardly bent baffle, the movable seat connected with the detector is movably clamped in the baffle of the support, the nozzle nozzle is provided with a plug, and the temperature sensing device is clamped between the plug and the movable seat. ​ 2. The integrated probe showerhead of claim 1, wherein: The temperature sensing device is one of a temperature sensing glass ball, a hot melting metal and a memory alloy.

3. The integrated probe nozzle of claim 1, wherein: The detector PCB circuit board is fixed on the movable seat, the temperature sensor, the VOC sensor and the CO sensor are arranged on the circuit board, and a protective cover is arranged outside the above sensors.

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