A fire warning method and device for battery

Abstract

The present invention discloses a fire warning method and device applied to a storage battery, belonging to the field of fire safety technology; a fire warning device applied to a storage battery comprises a mounting plate, and also comprises: an outer shell fixedly connected to the bottom of the mounting plate, wherein a vent hole is opened on the outer shell, a filter screen is arranged on the vent hole, an inner shell is rotatably connected to the mounting plate and arranged in the cavity of the outer shell, a detection box is arranged on the inner shell, a gas detection mechanism is arranged in the cavity of the detection box, and the adsorption end of the gas detection mechanism faces the vent hole; a movable block is lifted and connected to the outer shell, wherein the cleaning end of the cleaning mechanism faces the air inlet surface of the vent hole and fits with the surface of the filter screen; the present invention can continuously adjust its spray angle through the reciprocating rotation of the nozzle to improve the spray efficiency and coverage, thereby enhancing the effect of prevention and fire extinguishing, and can also cooperate with the gas sensor to detect gas abnormalities in the space in real time and respond.

Description

Technical Field

[0001] The present invention relates to the field of fire safety technology, and in particular to a fire warning method and device applied to a battery. Background Art

[0002] The widespread use of batteries in electric vehicles and renewable energy systems has made their fire warning technology increasingly important. Due to their high energy density and wide application, there is a high risk of fire when they are improperly handled or fail.

[0003] At present, the main signs before a battery catches fire are as follows: First, the battery temperature rises significantly during charging or discharging, exceeding the normal operating temperature range, especially after long-term use. The continued increase in temperature may be a signal of a fault; Second, a small amount of gas leakage and odor (such as hydrogen and hydrogen fluoride) in the battery may also indicate that the battery is at risk of thermal runaway.

[0004] Therefore, there is an urgent need to design a fire warning method and device for batteries to monitor the problems that may arise in the early stages of battery fires and take effective measures to control the initial phenomena of fires. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of preventing battery fire in the prior art, and to propose a fire warning method and device applied to batteries.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A fire warning device for a battery comprises a mounting plate, and further comprises: an outer shell fixedly connected to the bottom of the mounting plate, wherein the outer shell is provided with a vent hole, a filter screen is arranged on the vent hole, an inner shell is rotatably connected to the mounting plate and arranged in the outer shell cavity, a detection box is arranged on the inner shell, a gas detection mechanism is arranged in the cavity of the detection box, and the adsorption end of the gas detection mechanism faces the vent hole; a movable block is lifted and connected to the outer shell, wherein the movable block is provided with a cleaning mechanism, and the cleaning end of the cleaning mechanism faces the air inlet surface of the vent hole and fits with the surface of the filter screen; a support plate fixedly connected to the inner wall of the inner shell, wherein the support plate is provided with a negative pressure suction mechanism, and the input end of the negative pressure suction mechanism is communicated with the detection box cavity; a working box fixedly connected to the bottom of the supporting plate, wherein the bottom of the working box is fixedly connected with a mounting seat, a nozzle is rotatably connected to the mounting seat, and a driving mechanism for driving the nozzle to swing is arranged on the working box.

[0008] In order to facilitate the cleaning of the air inlet surface of the filter, preferably, the cleaning mechanism includes a cleaning plate, a screw is rotatably connected to the outer shell, the movable block is threadedly connected to the screw, and the movable block is in contact with the inner wall of the outer shell, the cleaning plate is fixedly connected to the top of the movable block by a connecting rod, and bristles are fixedly connected to the cleaning plate, and the cleaning end of the bristles is in contact with the air inlet surface of the filter.

[0009] In order to facilitate the reciprocating movement of the movable block, further, a transmission tooth block is fixedly connected to the outer wall of the inner shell, and a transmission gear is fixedly connected to the top of the screw rod, and the transmission gear is meshed with the transmission tooth block.

[0010] In order to facilitate the detection of impurities in the gas, further, the gas detection mechanism includes a gas sensor, and the detection box is provided with an air inlet, which is connected to the cavity of the detection box and faces the vent.

[0011] In order to facilitate providing a negative pressure effect in the detection box, preferably, the negative pressure suction mechanism includes a negative pressure plate fixedly connected to the top of the support plate, the support plate is rotatably connected with a rotating shaft, the rotating shaft extends to the cavity of the negative pressure plate and is fixedly connected with blades, and an air inlet pipe and an air outlet pipe are respectively provided on both sides of the negative pressure plate, and the air inlet pipe is communicated with the cavity of the detection box.

[0012] In order to facilitate the rotation of the rotating shaft, further, the outer shell is fixedly connected to an annular plate via a limiting plate, the support plate is rotatably connected to a transmission shaft, one end of the transmission shaft is fixedly connected to a friction wheel, the friction wheel is in contact with the inner wall of the annular plate, the other end of the transmission shaft is fixedly connected to a main pulley, the rotating shaft is fixedly connected to an auxiliary pulley, and the main pulley and the auxiliary pulley are connected via a belt drive.

[0013] In order to facilitate the swinging of the nozzle, preferably, the driving mechanism includes a guide cylinder, a guide rod is slidably connected to the guide cylinder, a limiting rod is fixedly connected to the mounting seat, the nozzle is fixedly connected to the limiting rod, and the bottom of the working box is respectively fixedly connected with a first baffle and a second baffle, one side of the nozzle is connected to the side wall of the first baffle through a limiting spring, and the other side of the nozzle is against the guide rod.

[0014] In order to facilitate the reciprocating movement of the guide rod, further, a connecting shaft is rotatably connected in the working box, a cam is fixedly connected to the connecting shaft, a booster cylinder is fixedly connected to the side wall of the working box, a booster rod is slidably connected to the booster cylinder, a piston is provided at one end of the booster rod, and the piston is in contact with the inner wall of the booster cylinder, the other end of the booster rod is fixedly connected to a limiting seat, a pressure wheel is rotatably connected to the limiting seat, and the pressure wheel abuts against the outer wall of the cam, a return spring is sleeved on the booster rod, and the two ends of the return spring respectively abut against the limiting seat and the outer wall of the booster cylinder.

[0015] In order to facilitate the reciprocating movement of the boost rod, preferably, a transmission disk is fixedly connected in the working box, the end of the connecting shaft away from the cam extends to the transmission disk and is fixedly connected to a turbine blade, the working box is respectively fixedly connected with a liquid storage tank and a water pump, the input end of the water pump is connected to the liquid storage tank through a telescopic tube, the output end of the water pump is connected to one side of the transmission disk through a telescopic tube, and the other side of the transmission disk is fixedly connected to the nozzle through a telescopic tube.

[0016] A fire warning method applied to a battery, the operation steps are as follows:

[0017] Step 1: Install the mounting plate on the top of the space where the battery is stored, and install a multi-source sensor inside the battery pack to monitor the parameter information of the battery pack;

[0018] Step 2: Install a BMS controller on the inner shell, analyze the information of the BMS controller, and use a gas sensor to detect the gas in the space in real time;

[0019] Step 3: The signal is transmitted to the signal processing system through the CAN bus. The signal processing system determines whether the water pump switch needs to be started according to the temperature value and temperature change rate, as well as the set threshold and logic;

[0020] Step 4: When the signal processing system detects that the temperature exceeds the threshold, it controls and starts the switch of the water pump, and the nozzle swings back and forth to spray the fire-fighting agent toward the outside of the battery to prevent and extinguish the fire.

[0021] Compared with the prior art, the present invention provides a fire warning method and device applied to batteries, which has the following beneficial effects:

[0022] 1. The fire warning device applied to the battery can generate negative pressure in the detection box through the negative pressure suction mechanism. When the inner shell rotates, it will drive the detection box to move to the position of the vent. The negative pressure suction mechanism can generate negative pressure in the detection box, so that the adsorption end of the detection box can quickly adsorb the gas at the position of the vent into the detection range of the gas detection mechanism for rapid detection, thereby improving the detection efficiency of the gas detection mechanism;

[0023] 2. The fire warning device applied to the battery drives the cleaning plate to move up and down through the connecting rod, so that the bristles on the cleaning plate move in contact with the surface of the filter. The bristles on the cleaning plate rub against the surface of the filter during the up and down reciprocating movement, thereby effectively removing dust and impurities attached to the surface of the filter, keeping the filter clean and ensuring good ventilation effect.

[0024] 3. The fire warning device applied to the battery can significantly increase the air intake speed of the detection box through the rapid movement of the gas in the cavity of the detection box, thereby improving the detection efficiency and sensitivity of the gas sensor;

[0025] 4. The fire warning device applied to the battery can continuously adjust its spray angle through the reciprocating rotation of the nozzle to improve the spray efficiency and coverage, thereby enhancing the effect of fire prevention and extinguishing;

[0026] 5. The fire warning device applied to the battery is provided with a BMS controller on the inner shell, and the BMS controller performs information analysis. The BMS controller can analyze the data collected in real time, such as judging whether the temperature of the battery pack exceeds the safety threshold, or whether the temperature changes too quickly, and cooperate with the gas sensor to detect the gas in the space in real time. When the BMS controller detects an abnormality inside the battery or an abnormality in the air detection of the gas sensor, it will notify the operator through an early warning strategy (such as issuing an alarm or automatically generating a report), and transmit the information to the signal processing system through the CAN bus to start the switch of the sprinkler to prevent and extinguish the fire.

[0027] The parts not involved in the device are the same as the existing technology or can be implemented by the existing technology. The present invention can continuously adjust the spray angle through the reciprocating rotation of the nozzle to improve the spray efficiency and coverage, thereby enhancing the prevention and fire extinguishing effects. It can also cooperate with the gas sensor to detect gas abnormalities in the space in real time and respond. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the axonometric structure of a fire warning device for a battery proposed by the present invention Figure 1 ;

[0029] Figure 2 A schematic diagram of the axonometric structure of a fire warning device for a battery proposed by the present invention Figure 2 ;

[0030] Figure 3 This is a schematic diagram of the structure inside the inner shell of a fire warning device applied to a battery proposed by the present invention;

[0031] Figure 4 A partial structural diagram of a fire warning device for batteries proposed by the present invention Figure 1 ;

[0032] Figure 5 A partial structural diagram of a fire warning device for batteries proposed by the present invention Figure 2 ;

[0033] Figure 6This is a structural schematic diagram of a negative pressure suction mechanism of a fire warning device applied to a battery proposed by the present invention;

[0034] Figure 7 A schematic diagram of the cross-section of a fire warning device for a battery proposed by the present invention Figure 1 ;

[0035] Figure 8 A schematic diagram of the cross-section of a fire warning device applied to a battery proposed by the present invention Figure 2 ;

[0036] Fig. 9 This is a structural schematic diagram of a fire warning device driving mechanism applied to a battery proposed by the present invention.

[0037] In the figure: 1, outer shell; 2, inner shell; 3, mounting plate; 4, fixing rod; 5, vent; 6, transmission gear block; 7, screw rod; 8, transmission gear; 9, movable block; 10, connecting rod; 11, cleaning plate; 12, brush; 13, motor; 14, detection box; 15, support plate; 16, gas sensor; 17, annular plate; 18, transmission shaft; 19, friction wheel; 20, rotating shaft; 21, negative pressure plate; 22, Blade; 23. Working box; 24. Mounting seat; 25. Limit rod; 26. Nozzle; 27. First baffle; 28. Limit spring; 29. ​​Second baffle; 30. Guide cylinder; 31. Guide rod; 32. Liquid storage tank; 33. Water pump; 34. Transmission plate; 35. Connecting shaft; 36. Turbine blade; 37. Cam; 38. Boost cylinder; 39. Boost rod; 40. Limit seat; 41. Pressure wheel; 42. Return spring. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Example

[0040] Reference Figure 1-Figure 9A fire warning method and device for a battery, comprising a mounting plate 3, and further comprising: a shell 1, fixedly connected to the bottom of the mounting plate 3, wherein a vent hole 5 is provided on the shell 1, and a filter is provided on the vent hole 5, an inner shell 2 is rotatably connected to the mounting plate 3 and is arranged in the cavity of the shell 1, a detection box 14 is provided on the inner shell 2, a gas detection mechanism is provided in the cavity of the detection box 14, and the adsorption end of the gas detection mechanism faces the vent hole 5; a movable block 9, which is lifted and connected to the shell 1, wherein a cleaning Mechanism, and the cleaning end of the cleaning mechanism faces the air inlet surface of the vent 5 and fits with the surface of the filter; the support plate 15 is fixedly connected to the inner wall of the inner shell 2, wherein a negative pressure suction mechanism is provided on the support plate 15, and the input end of the negative pressure suction mechanism is communicated with the cavity of the detection box 14; the working box 23 is fixedly connected to the bottom of the support plate 15, wherein a mounting seat 24 is fixedly connected to the bottom of the working box 23, a nozzle 26 is rotatably connected to the mounting seat 24, and a driving mechanism for driving the nozzle 26 to swing is provided on the working box 23.

[0041] The mounting plate 3 is installed in the space where the batteries are stored, and is usually arranged at the top plate of the space, so that the nozzle 26 can spray the fire-fighting agent in the direction of the batteries, and the mounting plate 3 is connected to the housing 1 through the fixing rod 4, and a plurality of symmetrical vents 5 are provided on the housing 1, so that the gas can enter the vents 5 from all sides of the housing 1, and the adsorption end of the gas detection mechanism can adsorb the air at different positions when rotating, so that it can quickly detect the odor in the gas. The battery will produce odor (such as hydrogen and hydrogen fluoride) before catching fire, and the gas detection mechanism can detect the odor in the air.

[0042] At the same time, negative pressure can be generated in the detection box 14 through the negative pressure suction mechanism. When the inner shell 2 rotates, it will drive the detection box 14 to move to the position of the vent 5. The negative pressure suction mechanism can generate negative pressure in the detection box 14, so that the adsorption end of the detection box 14 can quickly adsorb the gas at the position of the vent 5 into the detection range of the gas detection mechanism for rapid detection, thereby improving the detection efficiency of the gas detection mechanism.

[0043] When the gas detection mechanism detects the generation of odor in the gas or detects hydrogen and hydrogen fluoride, the nozzle 26 swings toward the outside of the battery to spray the fire-fighting agent to prevent or cool down the outside of the battery to extinguish the fire.

[0044] In order to prevent external dust from clogging the surface of the filter, the above-mentioned cleaning mechanism includes a cleaning plate 11, a screw rod 7 is rotatably connected to the outer shell 1, a movable block 9 is threadedly connected to the screw rod 7, and the movable block 9 is in contact with the inner wall of the outer shell 1, the cleaning plate 11 is fixedly connected to the top of the movable block 9 by a connecting rod 10, and a brush 12 is fixedly connected to the cleaning plate 11, and the cleaning end of the brush 12 is in contact with the air inlet surface of the filter.

[0045] When the screw rod 7 rotates, it will drive the movable block 9 to move back and forth up and down in close contact with the inner wall of the shell 1, and then the movable block 9 drives the cleaning plate 11 to move back and forth up and down through the connecting rod 10, so that the bristles 12 on the cleaning plate 11 move in close contact with the surface of the filter net. During the up and down reciprocating movement, the bristles 12 on the cleaning plate 11 will rub against the surface of the filter net, thereby effectively removing dust and impurities attached to the surface of the filter net, keeping the filter net clean and ensuring its good ventilation effect.

[0046] In order to drive the screw rod 7 to rotate continuously, a motor 13 is fixedly connected to the mounting plate 3, and the inner shell 2 is fixedly connected to the output end of the motor 13. The motor 13 can drive the inner shell 2 to rotate in the cavity of the outer shell 1. A transmission tooth block 6 is fixedly connected to the outer wall of the inner shell 2, and a transmission gear 8 is fixedly connected to the top of the screw rod 7, and the transmission gear 8 is meshed with the transmission tooth block 6.

[0047] When the inner shell 2 rotates, the transmission gear block 6 drives the meshing transmission gear 8 to rotate, and then the transmission gear 8 drives the screw rod 7 to rotate, thereby realizing the function of rotating the screw rod 7.

[0048] Furthermore, the gas detection mechanism includes a gas sensor 16 , and an air inlet is provided on the detection box 14 , the air inlet is communicated with the cavity of the detection box 14 , and the air inlet faces the vent hole 5 .

[0049] The gas sensor 16 can use a CCR4HF-10 hydrogen fluoride sensor or a 4H2-1000 hydrogen sensor, which can detect whether the gas in the space contains hydrogen or hydrogen fluoride, and the air inlet is connected to the cavity of the detection box 14, so that the gas in the space can be directly transported to the detection range of the gas sensor 16.

[0050] In order to increase the air intake speed of the detection box 14, the above-mentioned negative pressure suction mechanism includes a negative pressure plate 21 fixedly connected to the top of the support plate 15, and a rotating shaft 20 is rotatably connected to the support plate 15. The rotating shaft 20 extends to the cavity of the negative pressure plate 21 and is fixedly connected with a blade 22. An air inlet pipe and an air outlet pipe are respectively arranged on both sides of the negative pressure plate 21, and the air inlet pipe is connected to the cavity of the detection box 14.

[0051] When the shaft 20 rotates, the blades 22 on the shaft 20 will be driven to rotate, and then the blades 22 will drive the gas in the cavity of the negative pressure plate 21 to rotate, so that negative pressure is generated in the cavity of the negative pressure plate 21. The rotating blades 22 cause the internal gas of the negative pressure plate 21 to flow rapidly through centrifugal force and gas dynamic effects. This gas flow forms a relatively low air pressure in the negative pressure plate 21, that is, negative pressure is generated. Due to the generation of negative pressure, the pressure difference between the inside and outside of the intake pipe increases, and the external air is sucked into the negative pressure plate 21 through the intake pipe. The intake pipe is connected to the cavity of the detection box 14, so the generated negative pressure can quickly attract the external air into the detection box 14.

[0052] The rapid movement of the gas in the cavity of the detection box 14 can significantly increase the air intake speed of the detection box 14 , thereby improving the detection efficiency and sensitivity of the gas sensor 16 .

[0053] In addition, an annular plate 17 is fixedly connected to the outer shell 1 through a limit plate, a transmission shaft 18 is rotatably connected to the support plate 15, one end of the transmission shaft 18 is fixedly connected to a friction wheel 19, the friction wheel 19 fits against the inner wall of the annular plate 17, the other end of the transmission shaft 18 is fixedly connected to a main pulley, and an auxiliary pulley is fixedly connected to the rotating shaft 20, and the main pulley and the auxiliary pulley are connected by belt drive.

[0054] When the inner shell 2 rotates, the outer portion of the friction wheel 19 will fit against the inner wall of the annular plate 17 and rotate, thereby driving the transmission shaft 18 to rotate, so that the transmission shaft 18 drives the main pulley to rotate, and the main pulley drives the auxiliary pulley to rotate through the belt, and then the auxiliary pulley drives the rotating shaft 20 to rotate.

[0055] In order to improve the prevention and fire extinguishing effects of the nozzle 26, the above-mentioned driving mechanism includes a guide cylinder 30, on which a guide rod 31 is slidably connected, a limiting rod 25 is fixedly connected to the mounting seat 24, the nozzle 26 is fixedly connected to the limiting rod 25, and a first baffle 27 and a second baffle 29 are fixedly connected to the bottom of the working box 23 respectively. One side of the nozzle 26 is connected to the side wall of the first baffle 27 through a limiting spring 28, and the other side of the nozzle 26 is against the guide rod 31.

[0056] When the guide rod 31 moves toward the outside of the nozzle 26, it can push one side of the nozzle 26 to move, so that the nozzle 26 rotates on the mounting seat 24. During this process, the limit spring 28 is compressed. When the guide rod 31 moves in the opposite direction of the nozzle 26, the limit spring 28 will drive the nozzle 26 to reset, thereby achieving the effect of the nozzle 26 swinging.

[0057] By reciprocating the rotation of the nozzle 26, the spraying angle can be continuously adjusted to improve the spraying efficiency and coverage, thereby enhancing the effect of fire prevention and extinguishing.

[0058] In order to make the guide rod 31 reciprocate and telescopically move on the guide cylinder 30, a connecting shaft 35 is rotatably connected in the working box 23, and a cam 37 is fixedly connected to the connecting shaft 35. A boosting cylinder 38 is fixedly connected to the side wall of the working box 23, and a boosting rod 39 is slidably connected to the boosting cylinder 38. A piston is provided at one end of the boosting rod 39, and the piston is in contact with the inner wall of the boosting cylinder 38. The other end of the boosting rod 39 is fixedly connected to a limiting seat 40, and a pressure wheel 41 is rotatably connected to the limiting seat 40, and the pressure wheel 41 is abutted against the outer wall of the cam 37. A return spring 42 is sleeved on the boosting rod 39, and the two ends of the return spring 42 are respectively abutted against the limiting seat 40 and the outer wall of the boosting cylinder 38.

[0059] Under the expansion effect of the return spring 42, the pressure wheel 41 on the limit seat 40 can always be in contact with the outside of the cam 37. When the cam 37 gradually rotates and the pressure wheel 41 moves to the protruding end of the cam 37, the boost rod 39 will gradually move to the inside of the boost cylinder 38. During this process, the return spring 42 will be compressed, and the piston will push the gas inside the boost cylinder 38 to transport the gas into the guide cylinder 30. A piston is also slidably connected inside the guide cylinder 30, and the guide rod 31 is fixedly connected to the piston. The gas will push the piston to move, and then the guide rod 31 will move from the inside of the guide cylinder 30 to the outside, thereby achieving the effect of moving the guide rod 31 from the inside of the guide cylinder 30 to the outside.

[0060] When the pressure wheel 41 moves from the protruding end on the cam 37 to other positions, the expansion effect of the reset spring 42 will drive the boost rod 39 to reset, thereby allowing the gas in the guide cylinder 30 to be re-transported to the inside of the boost cylinder 38, and then allowing the guide rod 31 to move from the outside of the guide cylinder 30 to the inside, thereby achieving the effect of moving the guide rod 31 from the outside of the guide cylinder 30 to the inside.

[0061] A transmission disc 34 is fixedly connected in the working box 23, and one end of the connecting shaft 35 away from the cam 37 extends to the transmission disc 34 and is fixedly connected to a turbine blade 36. A liquid storage tank 32 and a water pump 33 are fixedly connected in the working box 23 respectively. The input end of the water pump 33 is connected to the liquid storage tank 32 through a telescopic tube, and the output end of the water pump 33 is connected to one side of the transmission disc 34 through a telescopic tube, and the other side of the transmission disc 34 is fixedly connected to the nozzle 26 through the telescopic tube.

[0062] The liquid storage tank 32 is filled with fire extinguishing agent, such as synthetic foam fire extinguishing agent and chlorohydrin fire extinguishing agent. The fire extinguishing agent in the liquid storage tank 32 can be transported to the transmission disk 34 through the water pump 33. During the transportation process, the turbine blade 36 will be driven to rotate, and then the turbine blade 36 will drive the connecting shaft 35 to rotate.

[0063] A fire warning method applied to a battery, the operation steps are as follows:

[0064] Step 1: Install the mounting plate 3 on the top of the space where the battery is stored, and install a multi-source sensor inside the battery pack to monitor the parameter information of the battery pack. The multi-source sensor can monitor the parameters of the battery pack in real time, including temperature, humidity, voltage changes, etc., and transmit the data to the BMS controller;

[0065] Step 2: A BMS controller is set on the inner shell 2, and information analysis is performed on the BMS controller. The BMS controller can perform analysis based on the data collected in real time, such as determining whether the temperature of the battery pack exceeds the safety threshold, or whether the temperature changes too quickly, and cooperate with the gas sensor 16 to detect the gas in the space in real time. When the BMS controller detects an abnormality inside the battery or an abnormality in the air detection by the gas sensor 16, it will notify the operator through an early warning strategy (such as issuing an alarm or automatically generating a report), and transmit the information to the signal processing system through the CAN bus;

[0066] Step 3: The signal is transmitted to the signal processing system through the CAN bus controller local area network. The signal processing system determines whether the water pump 33 switch needs to be started according to the temperature value and the temperature change rate, and according to the set threshold and logic;

[0067] Step 4: When the signal processing system detects that the temperature exceeds the threshold, it controls and starts the switch of the water pump 33, and the nozzle 26 swings back and forth to spray the fire-fighting agent toward the outside of the battery to prevent and extinguish the fire.

[0068] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fire warning device applied to a battery, comprising a mounting plate (3), characterized in that: Also includes: The housing (1) is fixedly connected to the bottom of the mounting plate (3). The outer shell (1) is provided with a vent hole (5), a filter screen is arranged on the vent hole (5), the mounting plate (3) is rotatably connected to the inner shell (2) and is arranged in the cavity of the outer shell (1), the inner shell (2) is provided with a detection box (14), a gas detection mechanism is arranged in the cavity of the detection box (14), and the adsorption end of the gas detection mechanism faces the vent hole (5); The movable block (9) is connected to the housing (1) in a lifting manner. Wherein, a cleaning mechanism is provided on the movable block (9), and a cleaning end of the cleaning mechanism faces the air inlet surface of the vent hole (5) and fits the surface of the filter screen; The support plate (15) is fixedly connected to the inner wall of the inner shell (2). Wherein, a negative pressure suction mechanism is provided on the support plate (15), and an input end of the negative pressure suction mechanism is in communication with the cavity of the detection box (14); The working box (23) is fixedly connected to the bottom of the supporting plate (15). The bottom of the working box (23) is fixedly connected to a mounting seat (24), a nozzle (26) is rotatably connected to the mounting seat (24), and a driving mechanism for driving the nozzle (26) to swing is provided on the working box (23); The cleaning mechanism comprises a cleaning plate (11), a screw rod (7) is rotatably connected to the housing (1), the movable block (9) is threadedly connected to the screw rod (7), and the movable block (9) is in contact with the inner wall of the housing (1), the cleaning plate (11) is fixedly connected to the top of the movable block (9) via a connecting rod (10), and bristles (12) are fixedly connected to the cleaning plate (11), and the cleaning end of the bristles (12) is in contact with the air inlet surface of the filter screen; A transmission tooth block (6) is fixedly connected to the outer wall of the inner shell (2), a transmission gear (8) is fixedly connected to the top of the screw rod (7), and the transmission gear (8) is meshed with the transmission tooth block (6).

2. A fire warning device applied to a battery according to claim 1, characterized in that: The gas detection mechanism comprises a gas sensor (16); an air inlet is provided on the detection box (14); the air inlet is communicated with the cavity of the detection box (14), and the air inlet faces the vent hole (5).

3. A fire warning device applied to a battery according to claim 2, characterized in that: The negative pressure suction mechanism comprises a negative pressure plate (21) fixedly connected to the top of a support plate (15); a rotating shaft (20) is rotatably connected to the support plate (15); the rotating shaft (20) extends into the cavity of the negative pressure plate (21) and is fixedly connected to a blade (22); an air inlet pipe and an air outlet pipe are respectively arranged on both sides of the negative pressure plate (21); the air inlet pipe is in communication with the cavity of the detection box (14).

4. A fire warning device applied to a battery according to claim 3, characterized in that: The housing (1) is fixedly connected to an annular plate (17) via a limiting plate, the support plate (15) is rotatably connected to a transmission shaft (18), one end of the transmission shaft (18) is fixedly connected to a friction wheel (19), the friction wheel (19) is in contact with the inner wall of the annular plate (17), the other end of the transmission shaft (18) is fixedly connected to a main pulley, the rotating shaft (20) is fixedly connected to an auxiliary pulley, and the main pulley and the auxiliary pulley are connected via a belt drive.

5. The fire warning device applied to a battery according to claim 1, characterized in that: The driving mechanism comprises a guide cylinder (30), a guide rod (31) being slidably connected to the guide cylinder (30), a limit rod (25) being fixedly connected to the mounting seat (24), the spray head (26) being fixedly connected to the limit rod (25), a first baffle plate (27) and a second baffle plate (29) being fixedly connected to the bottom of the working box (23), one side of the spray head (26) being connected to a side wall of the first baffle plate (27) via a limit spring (28), and the other side of the spray head (26) being in contact with the guide rod (31).

6. A fire warning device applied to a battery according to claim 5, characterized in that: A connecting shaft (35) is rotatably connected inside the working box (23), a cam (37) is fixedly connected to the connecting shaft (35), a booster cylinder (38) is fixedly connected to the side wall of the working box (23), a booster rod (39) is slidably connected to the booster cylinder (38), a piston is provided at one end of the booster rod (39), and the piston is in contact with the inner wall of the booster cylinder (38), the other end of the booster rod (39) is fixedly connected to a limit seat (40), a pressure wheel (41) is rotatably connected to the limit seat (40), and the pressure wheel (41) is in contact with the outer wall of the cam (37), and a return spring (42) is sleeved on the booster rod (39), and the two ends of the return spring (42) are respectively in contact with the limit seat (40) and the outer wall of the booster cylinder (38).

7. A fire warning device applied to a battery according to claim 6, characterized in that: A transmission disc (34) is fixedly connected in the working box (23); one end of the connecting shaft (35) away from the cam (37) extends to the transmission disc (34) and is fixedly connected to a turbine blade (36); a liquid storage tank (32) and a water pump (33) are respectively fixedly connected in the working box (23); an input end of the water pump (33) is connected to the liquid storage tank (32) via a telescopic tube; an output end of the water pump (33) is connected to one side of the transmission disc (34) via a telescopic tube; and the other side of the transmission disc (34) is fixedly connected to the spray head (26) via the telescopic tube.

8. A fire warning method applied to a storage battery, the method being applied to a fire warning device applied to a storage battery as claimed in any one of claims 1 to 7, characterized in that: The steps are as follows: Step 1: Install the mounting plate (3) on the top of the space for storing the battery, and install a multi-source sensor inside the battery pack to monitor the parameter information of the battery pack; Step 2: a BMS controller is arranged on the inner shell (2), and information analysis is performed on the BMS controller, while simultaneously cooperating with the gas sensor (16) to detect the gas in the space in real time; Step 3: transmitting the signal to the signal processing system via the CAN bus controller local area network, and the signal processing system determines whether the water pump (33) switch needs to be started according to the temperature value and the temperature change rate, and according to the set threshold and logic; Step 4: When the signal processing system detects that the temperature exceeds the threshold value, the switch of the water pump (33) is controlled and started, and the nozzle (26) reciprocates to spray the fire-fighting agent toward the outside of the battery to prevent and extinguish the fire.

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