A lithium battery compartment thermal aerosol fire extinguishing device

Abstract

The utility model relates to lithium battery cabin fire extinguishing technical field, and disclose a kind of lithium battery cabin thermal aerosol fire extinguishing device, comprising: shell and connecting seat, inside loading aerosol generator and main control circuit board, top cover is equipped with adjusting seat, adjusting seat both sides fixed plate respectively install first drive motor and second drive motor. First drive motor is rotated by worm drive worm wheel, drive connecting frame board and jet seat horizontal rotation, second drive motor is driven connecting plate vertical pitch by ring connecting plate, form double-shaft linkage adjusting mechanism, significantly expand the coverage of spray head, realize fire source directional injection, jet seat and shell adopt telescopic conduit connection between, ensure the continuous sealing of fire extinguishing agent delivery channel in angle adjusting process, avoid traditional pipeline leakage risk, device integration jet mechanism and power component, by main control circuit board automation control, when fire occurs, can quickly respond and adjust jet angle, can improve fire extinguishing agent utilization.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery compartment fire extinguishing technology, specifically a lithium battery compartment thermal aerosol fire extinguishing device. Background Technology

[0002] A lithium battery compartment is a closed or semi-closed structure specifically designed to house, protect, and manage lithium batteries. Its core functions include: safety protection: ensuring safe operation of lithium batteries in extreme environments through fireproof, explosion-proof, and corrosion-resistant designs; energy management: integrating thermal management systems and battery management systems (BMS) to maintain the battery within its optimal operating temperature range and monitor battery status; system integration: serving as the power core of energy storage systems or new energy vehicles, connecting battery clusters, converters (PCS), and other components to achieve energy storage and release. Under conditions such as overcharging, over-discharging, short circuits, high temperatures, or physical damage, lithium batteries can experience thermal runaway. This process releases large amounts of flammable gases and electrolyte vapors, accompanied by intense heat release, leading to battery fires or even explosions, requiring the use of thermal aerosol fire extinguishing devices.

[0003] Traditional lithium battery compartment thermal aerosol fire extinguishing devices are directly bolted to the compartment wall or the top of the battery modules. While this design meets basic installation requirements, the direction and coverage of the extinguishing agent spray are limited by a fixed angle, making dynamic adjustment based on the battery layout or fire source location difficult. This results in insufficient extinguishing agent concentration or blind spots in some areas. To address these issues, some lithium battery compartment thermal aerosol fire extinguishing devices utilize stepper motors, drive shafts, active bevel gears, driven gears, and mounting brackets to adjust the nozzle angle, thereby improving the extinguishing agent spray direction and coverage. However, this method, due to the use of stepper motors and other components, not only complicates the angle adjustment structure but also increases maintenance difficulty. Therefore, a new lithium battery compartment thermal aerosol fire extinguishing device is proposed. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a lithium battery compartment thermal aerosol fire extinguishing device, which solves the aforementioned technical problems that not only complicate the angle adjustment structure but also increase maintenance difficulty.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery compartment thermal aerosol fire extinguishing device, comprising:

[0008] The outer casing, and the connecting seat located at the bottom of the outer casing, and the top of the outer casing is provided with a cover plate, and the inner cavity of the outer casing is also equipped with an initiator, an aerosol generator and a main control circuit board;

[0009] An adjusting seat is located on the top of the cover plate, and fixed plates are installed on both sides of the upper surface of the adjusting seat. A first drive motor and a second drive motor are respectively installed on the outside of the fixed plates. The first drive motor is coaxially connected to a worm gear, and a worm wheel meshes above the worm gear.

[0010] A connecting frame plate is connected to the center of the front and back of the worm gear. Ring connecting plates are installed on both sides of the connecting frame plate, and a connecting plate is connected above the connecting frame plate. The ring connecting plates are coaxially connected to the second drive motor. A spray seat is installed on the upper surface of the connecting plate, and nozzles are connected to the discharge end of the upper surface of the spray seat. A telescopic conduit connects the inlet end of the spray seat to the outlet end of the outer shell. The outer shell is fixed to the corresponding position in the lithium battery compartment via the connecting seat. The aerosol generator loaded in the inner cavity of the outer shell receives a fire signal from the lithium battery compartment via the main control circuit board, triggering the initiator. The initiator ignites the aerosol generator through electrothermal or chemical means, causing it to undergo an oxidation-reduction reaction to generate an aerosol extinguishing agent containing nitrogen, carbon dioxide, and metal salt particles. The main control circuit board synchronously controls the start of the drive mechanism of the adjusting seat, providing power support for adjusting the spray angle. The first drive motor fixed to the adjusting seat receives instructions from the main control circuit board and drives the worm gear to rotate. Through the meshing transmission between the worm gear and the worm wheel, the rotational motion is converted into horizontal motion. Circular motion enables the connecting frame plate to rotate horizontally. The self-locking characteristic of the worm gear and worm wheel mechanism ensures the precise positioning of the spray seat in the target orientation. The second drive motor forms a synchronous transmission link with the connecting frame plate through the ring connecting plate, driving the connecting plate to perform vertical pitching motion around the axis of the ring connecting plate. This mechanism, combined with the horizontal rotation mechanism, causes the spray seat installed above the connecting plate to form a spatial conical scanning trajectory. The angle adjustment structure is simple and reduces maintenance difficulty. The discharge end of the outer shell is connected to the feed end of the spray seat through a telescopic conduit. The telescopic conduit can achieve axial extension and radial bending as the angle of the spray seat is adjusted, ensuring the continuity of the extinguishing agent delivery channel. The fire extinguishing agent is evenly distributed to each nozzle through the internal distribution chamber of the spray holder and sprayed into the lithium battery compartment. The main control circuit board consists of a fire detection module, a main control processing module, a motor drive module, a power management module, and a safety interlock module. The fire detection module integrates smoke and heat detectors, which monitor the interior environment in real time through a distributed layout. The main control processing module, with a microcontroller as its core and equipped with a fire algorithm logic library, receives detection signals, eliminates false alarms through dynamic threshold comparison, generates control commands after confirming the fire, and triggers a delay program to allow time for personnel evacuation. The motor drive module adopts H... The bridge drive circuit has a built-in current feedback loop. After receiving the PWM signal from the microcontroller, the first drive motor drives the worm gear to achieve horizontal rotation, and the second drive motor drives the connecting plate to achieve vertical pitch. The power management module is equipped with a supercapacitor energy storage unit, which automatically switches when the main power is interrupted to maintain the system in standby mode for a long time. The safety interlock module integrates a mechanical emergency stop switch and an electronic braking unit. When abnormal starting conditions other than fire are detected, the power supply to the drive motor is immediately cut off and a fault code is fed back to the main control module to prevent malfunction. The composition and use of the above modules are all existing technologies, so they will not be described in detail here.

[0011] Preferably, the top of the connector has six sets of evenly spaced connecting holes. The connector is mechanically fixed to the lithium battery compartment mounting base through the six sets of evenly spaced connecting holes on the top. The six sets of symmetrically distributed holes provide multi-point bolt connections, effectively dispersing the vibration load during device operation.

[0012] Preferably, the rotating end of the first drive motor extends inward through the outer side of the corresponding fixed plate and is coaxially connected to the end of the worm. The output shaft of the first drive motor passes through the fixed plate and is coaxially connected to the end of the worm by a spline, so that the first drive motor drives the worm to rotate on the fixed plate and adjusts the direction of the worm.

[0013] Preferably, the outer surface of the fixing plate is provided with annular grooves, and the connecting plate is rotatably connected to the annular grooves. When the second drive motor drives the connecting plate to rotate, the connecting plate moves in a circular motion along the annular grooves.

[0014] Preferably, the rotating end of the second drive motor is coaxially connected to a circular connecting plate, and the circular connecting plate is connected to a corresponding annular connecting plate. The second drive motor is rigidly connected to the annular connecting plate through the circular connecting plate, driving the connecting plate to perform pitching motion around the axis of the annular connecting plate.

[0015] Preferably, rotating rods are evenly installed on the inner side of the annular connecting plate, and the surface of the rotating rods slides in contact with the inner wall of the annular groove. The annular connecting plate drives the rotating rods to rotate within the annular groove, preventing the annular connecting plate from separating or falling off during rotation.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a lithium battery compartment thermal aerosol fire extinguishing device, which has the following beneficial effects:

[0018] This lithium battery compartment thermal aerosol fire extinguishing device uses a first drive motor to drive a worm gear, which in turn rotates the connecting frame plate and the spray seat horizontally. This, combined with a second drive motor driving the connecting plate via a ring plate for vertical pitch adjustment, forms a dual-axis linkage adjustment mechanism. This significantly expands the coverage area of ​​the nozzles, allowing for targeted spraying of fire sources at different locations within the lithium battery compartment, improving extinguishing agent utilization. The angle adjustment structure is simple and reduces maintenance difficulty. A telescopic conduit connects the spray seat to the outer casing, maintaining the continuity and sealing of the extinguishing agent delivery channel during nozzle angle adjustment. This avoids the risk of delivery interruption or leakage due to angle limitations in traditional fixed pipelines, ensuring stable extinguishing agent release. The integrated design combines the spray mechanism and power components in the adjustment seat, achieving automated control via a main control circuit board. In the event of a fire, it can quickly respond and adjust the spray angle, effectively suppressing fires in the lithium battery compartment, reducing the risk of fire spread, and improving overall fire safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the adjusting seat and its connection structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the worm gear and its connecting structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the right side view of the adjustment seat of this utility model;

[0023] Figure 5 This is a schematic diagram of the second drive motor and its connection structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the connecting frame plate and its connecting structure of the present invention.

[0025] In the diagram: 1. Outer shell; 2. Connecting seat; 3. Connecting hole; 4. Cover plate; 5. Adjusting seat; 6. Fixing plate; 7. First drive motor; 8. Second drive motor; 9. Worm gear; 10. Worm wheel; 11. Connecting frame plate; 12. Ring connecting plate; 13. Connecting plate; 14. Spray seat; 15. Nozzle; 16. Telescopic guide tube; 17. Annular groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This utility model provides a technical solution: a lithium battery compartment thermal aerosol fire extinguishing device, comprising: (see details) Figures 1 to 6 The outer shell 1, and the connecting seat 2 provided at the bottom of the outer shell 1, and the top of the outer shell 1 is provided with a cover plate 4, and the inner cavity of the outer shell 1 is also provided with an initiator, an aerosol generator and a main control circuit board.

[0028] Adjustment seat 5 is set on the top of cover plate 4, and fixing plates 6 are installed on both sides of the upper surface of adjustment seat 5. A first drive motor 7 and a second drive motor 8 are respectively added to the outside of the fixing plates 6. The first drive motor 7 is coaxially connected to a worm 9, and a worm wheel 10 is meshed above the worm 9.

[0029] The connecting frame plate 11 is connected to the center of the front and back sides of the worm gear 10. Both sides of the connecting frame plate 11 are equipped with ring connecting plates 12, and a connecting plate 13 is connected above the connecting frame plate 11. The ring connecting plates 12 are coaxially connected to the second drive motor 8. A spray seat 14 is installed on the upper surface of the connecting plate 13. The discharge end of the upper surface of the spray seat 14 is connected to a nozzle 15. A telescopic guide tube 16 is connected between the feed end of the spray seat 14 and the discharge end of the outer shell 1.The outer shell 1 is fixed to the corresponding position in the lithium battery compartment via the connecting seat 2. The aerosol generator loaded in the inner cavity of the outer shell 1 receives a fire signal from the lithium battery compartment via the main control circuit board and triggers the initiator. The initiator ignites the aerosol generator by electrothermal or chemical means, causing it to undergo an oxidation-reduction reaction to generate an aerosol extinguishing agent containing nitrogen, carbon dioxide and metal salt particles. The main control circuit board synchronously controls the drive mechanism of the adjusting seat 5 to start, providing power support for adjusting the spray angle. The first drive motor 7 fixed to the adjusting seat 5 receives the command from the main control circuit board and drives the worm 9 to rotate. Through the meshing transmission between the worm 9 and the worm wheel 10, the rotational motion is converted into circular motion in the horizontal plane. The movement causes the connecting frame plate 11 to rotate horizontally. The self-locking characteristic of the worm gear 9 and worm wheel 10 mechanism ensures the precise positioning of the spray seat 14 in the target position. The second drive motor 8 forms a synchronous transmission link with the connecting frame plate 11 through the ring connecting plate 12, driving the connecting plate 13 to perform vertical pitching motion around the axis of the ring connecting plate 12. This mechanism, combined with the horizontal rotation mechanism, causes the spray seat 14 installed above the connecting plate 13 to form a spatial conical scanning trajectory. The angle adjustment structure is simple and reduces maintenance difficulty. The discharge end of the outer shell 1 is connected to the feed end of the spray seat 14 through the telescopic guide tube 16. The telescopic guide tube 16 adjusts the angle of the spray seat 14 to achieve axial extension and radial bending. The system ensures the continuous sealing of the extinguishing agent delivery channel. The extinguishing agent is evenly distributed to each nozzle 15 through the internal distribution chamber of the spray seat 14 and sprayed into the lithium battery compartment. The main control circuit board consists of a fire detection module, a main control processing module, a motor drive module, a power management module, and a safety interlock module. The fire detection module integrates smoke detectors and heat detectors, and monitors the compartment environment in real time through a distributed layout. The main control processing module, with a microcontroller as its core, is equipped with a fire algorithm logic library. After receiving the detection signal, it eliminates false alarms through dynamic threshold comparison. After confirming the fire, it generates control commands and triggers a delay program to reserve time for personnel evacuation. The motor drive... The module employs an H-bridge drive circuit with a built-in current feedback loop. After receiving the PWM signal from the microcontroller, the first drive motor 7 drives the worm wheel 10 through the worm gear 9 to achieve horizontal rotation, while the second drive motor 8 drives the connecting plate 13 to achieve vertical pitch. The power management module is equipped with a supercapacitor energy storage unit, which automatically switches when the main power supply fails to maintain the system in standby mode for a long time. The safety interlock module integrates a mechanical emergency stop switch and an electronic braking unit. When abnormal startup or other non-fire-related situations are detected, the power supply to the drive motor is immediately cut off and a fault code is fed back to the main control module to prevent malfunctions. The composition and use of the above modules are all existing technologies and will not be described in detail here.

[0030] Please see Figure 1The top of the connecting seat 2 is evenly provided with six sets of connecting holes 3. The connecting seat 2 is mechanically fixed to the lithium battery compartment mounting base through the six sets of connecting holes 3 evenly provided on the top. The six sets of symmetrically distributed holes provide multi-point bolt connection and effectively disperse the vibration load during device operation.

[0031] Please see Figure 2 , Figure 3 and Figure 4 The rotating end of the first drive motor 7 extends inward through the outer side of the corresponding fixed plate 6 and is coaxially connected to the end of the worm 9. The output shaft of the first drive motor 7 passes through the fixed plate 6 and is coaxially connected to the end of the worm 9 via a spline, so that the first drive motor 7 drives the worm 9 to rotate on the fixed plate 6 and adjusts the direction of the worm 9. Annular grooves 17 are provided on the outer surface of the fixed plate 6, and the annular connecting plate 12 is rotatably connected to the annular grooves 17. When the second drive motor 8 drives the annular connecting plate 12 to rotate, the annular connecting plate 12 moves in a circular motion along the annular grooves 17.

[0032] Please see Figure 5 The rotating end of the second drive motor 8 is coaxially connected to a circular connecting plate, which is connected to the corresponding annular connecting plate 12. The second drive motor 8 is rigidly connected to the annular connecting plate 12 via the circular connecting plate, driving the connecting plate 13 to perform pitching motion around the axis of the annular connecting plate 12. Rotating rods are evenly installed on the inner side of the annular connecting plate 12, and the surface of the rotating rods slides against the inner wall of the annular groove 17. The annular connecting plate 12 drives the rotating rods to rotate within the annular groove 17, preventing the annular connecting plate 12 from separating or falling off during rotation.

[0033] This solution uses six sets of connection holes 3 on the top of the connector 2 to fix the outer shell 1 to the preset mounting base of the lithium battery compartment. The fire detection module of the main control circuit board monitors the environment inside the compartment in real time through distributed smoke detectors and temperature detectors. When the smoke concentration or temperature change rate exceeds the preset threshold, it transmits a trigger signal to the main control processing module. After confirming the fire, the main control processing module sends an electrical pulse signal to the initiator. The initiator ignites the gas aerosol generator through the heating wire, causing it to undergo an oxidation-reduction reaction to generate an aerosol extinguishing agent containing nitrogen, carbon dioxide, and metal salt particles. The main control circuit board simultaneously activates the motor drive module. The first drive motor 7 and the second drive motor 8 receive PWM control signals. The H-bridge drive circuit has a built-in current feedback loop to ensure smooth motor start-up. The first drive motor 7 drives the worm gear 9 to rotate. The meshing transmission of the worm gear 9 and worm wheel 10 converts the rotational motion into a circular motion in the horizontal plane, driving the connecting frame plate 11 and the spray seat 14 to rotate horizontally. The self-locking characteristic of the worm gear 9 and worm wheel 10 mechanism locks the target position. The second drive motor 8 drives the ring connecting plate 12 to move in a circular motion along the annular groove 17 of the fixed plate 6 through the circular connecting plate. The rotating rod on the inner side of the ring connecting plate 12 slides against the inner wall of the annular groove 17, driving the connecting plate 13 to move vertically and pitch around the axis of the ring connecting plate 12. The discharge end of the outer shell 1 delivers the extinguishing agent to the spray seat 14 through the telescopic conduit 16. The telescopic conduit 16 adjusts the angle of the spray seat 14 to achieve axial extension and radial bending, maintaining the continuous sealing of the delivery channel. The extinguishing agent is evenly distributed to each nozzle 15 through the internal distribution chamber of the spray seat 14 and sprayed into the lithium battery compartment.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithium battery compartment thermal aerosol fire extinguishing apparatus, characterized by, include: The outer shell (1) and the connecting seat (2) provided at the bottom of the outer shell (1) are provided with a cover plate (4) on the top of the outer shell (1), and an initiator, an aerosol generator and a main control circuit board are also installed in the inner cavity of the outer shell (1). An adjusting seat (5) is set on the top of the cover plate (4), and a fixing plate (6) is installed on both sides of the upper surface of the adjusting seat (5). A first drive motor (7) and a second drive motor (8) are respectively added to the outside of the fixing plate (6). The first drive motor (7) is coaxially connected to a worm (9), and a worm wheel (10) meshes above the worm (9). The connecting frame plate (11) is connected to the center of the front and back sides of the worm gear (10), and the connecting frame plate (12) is installed on both sides of the connecting frame plate (11), and the connecting plate (13) is connected above the connecting frame plate (11). The connecting plate (12) is coaxially connected to the second drive motor (8), and the spray seat (14) is installed on the upper surface of the connecting plate (13). The upper surface of the spray seat (14) is connected to the discharge end of the spray seat (14) with a nozzle (15), and the feed end of the spray seat (14) is connected to the discharge end of the outer shell (1) with a telescopic guide tube (16).

2. A thermal aerosol fire extinguishing system for a lithium battery compartment according to claim 1, wherein: The top of the connector (2) is provided with connecting holes (3) evenly distributed, and there are six sets of connecting holes (3).

3. A thermal aerosol fire extinguishing system for a lithium battery compartment according to claim 1, wherein: The rotating end of the first drive motor (7) extends inward through the outer side of the corresponding fixed plate (6) and is coaxially connected to the end of the worm (9).

4. The lithium battery compartment thermal aerosol fire extinguishing device of claim 1, wherein: The outer side of the fixing plate (6) is provided with annular grooves (17), and the ring connecting plate (12) is rotatably connected to the annular grooves (17).

5. The lithium battery compartment thermal aerosol fire extinguishing device of claim 1, wherein: The rotating end of the second drive motor (8) is coaxially connected to a circular connecting plate, and the circular connecting plate is connected to the corresponding ring connecting plate (12).

6. A lithium battery compartment thermal aerosol fire extinguishing device according to claim 4, wherein: Rotating rods are evenly installed on the inner side of the ring plate (12), and the surface of the rotating rods slides against the inner wall of the annular groove (17).

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