Unmanned aerial vehicle lithium battery charging cabinet

Abstract

The utility model discloses an unmanned plane lithium cell charging cabinet, including the cabinet, the inside of cabinet is provided with the charging cavity, the inside of charging cavity is provided with the fire extinguishing component for preventing and extinguishing the fire, the fire extinguishing component includes the fixed box of installation in the inner top wall of charging cavity, the inside of fixed box is provided with the cavity, the inside installation of cavity has the medicine box of depositing aerosol medicine, the cooling cavity for depositing coolant is formed between fixed box and medicine box, the top embedded installation of fixed box has the igniter for aerosol medicine ignition trigger of carrying out, the lateral wall of medicine box extends to fixed box outside and is equipped with a plurality of groups of the spray head of spraying aerosol medicine. Through the cooperation of each component of fire extinguishing component, when the battery heat runaway causes dangerous situation, can realize fire extinguishing quickly, effectively block the spread of fire, prevent explosion, greatly improve the safety of unmanned plane lithium cell charging process.

Description

Technical Field

[0001] This utility model relates to the field of charging cabinet technology, specifically to a lithium battery charging cabinet for drones. Background Technology

[0002] With the rapid development and widespread application of drone technology, the drone market is experiencing rapid growth. Drones play an important role in various fields such as aerial photography, surveying, agriculture, and rescue, which places higher demands on the charging efficiency and safety of drone lithium batteries.

[0003] Existing drone lithium battery charging cabinets generally lack effective fire prevention mechanisms. When batteries experience thermal runaway due to overcharging, overheating, internal short circuits in the cells, or mechanical damage, they rapidly release flammable gases, accompanied by the ejection of high-temperature substances. If control measures are not taken in time, this can easily lead to fires or even explosions. Therefore, there is a need for a drone lithium battery charging cabinet. Utility Model Content

[0004] The purpose of this utility model is to provide a lithium battery charging cabinet for drones, which prevents fires inside the cabinet by setting fire extinguishing components inside the charging chamber, thereby solving the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A lithium battery charging cabinet for drones includes a cabinet body, a charging chamber, and a fire extinguishing component. The charging chamber is located inside the cabinet body, and the fire extinguishing component is installed on the inner top wall of the charging chamber.

[0007] The fire extinguishing assembly includes a fixed box installed on the inner top wall of the charging chamber. The fixed box has an internal cavity, and an aerosol agent container is installed inside the cavity. A cooling chamber for storing coolant is formed between the fixed box and the aerosol agent container. An igniter for igniting the aerosol agent is embedded in the top of the fixed box. Several sets of nozzles for spraying aerosol agent are installed on the side wall of the aerosol agent container extending through to the outside of the fixed box.

[0008] Preferably, the side wall of the fixing box is provided with several sets of through holes, and each set of nozzles passes through the cooling chamber and is installed inside the corresponding through hole.

[0009] Preferably, a smoke detector is installed on the inner top wall of the charging chamber on the side of the fire extinguishing assembly, and the smoke detector is electrically connected to the fire extinguishing assembly.

[0010] Preferably, a battery charging compartment is slidably installed inside the charging cavity, and the two side walls of the battery charging compartment are slidably connected to the two side inner walls of the charging cavity through guide rails. Several sets of charging positions are evenly opened on the upper part of the battery charging compartment.

[0011] Preferably, a cabinet door is fixedly installed on the side wall of the battery charging compartment, and an observation window is embedded in the middle of the cabinet door. When the cabinet door is pulled, the battery charging compartment can slide along the inside of the charging cavity.

[0012] Preferably, the side wall of the cabinet has several sets of windows corresponding to the charging cavity, and a first fan is installed inside each set of windows.

[0013] Preferably, the two side walls of the cabinet are symmetrically provided with several sets of air holes, and the several sets of air holes are distributed in an array.

[0014] Preferably, the top of the cabinet is provided with an installation slot, and the charging module power supply, the control module and the control module power supply are installed in sequence inside the installation slot.

[0015] Preferably, the control module is electrically connected to the smoke detector and the fire extinguishing assembly respectively. When the smoke detector detects smoke, the control module can trigger the igniter to operate.

[0016] Preferably, a second fan is embedded in the mounting slot on the side wall of the cabinet, and the second fan can dissipate heat from the equipment in the mounting slot.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] When a fire occurs inside the charging chamber, the igniter quickly triggers and ignites the aerosol agent in the agent cartridge. The fire-extinguishing aerosol generated by the reaction first passes through the cooling chamber, where the temperature is lowered by the coolant, and then is evenly sprayed into the charging chamber through the nozzle, quickly acting on the fire source to extinguish it. Through the coordinated operation of the various components of the fire extinguishing system, when a battery experiences thermal runaway and causes a dangerous situation, it can quickly extinguish the fire, effectively preventing the spread of fire and preventing explosions, significantly improving the safety of the drone's lithium battery charging process. 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 showing the disassembled structure of the battery charging compartment of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the charging cavity of this utility model;

[0022] Figure 4 This is a schematic diagram of the fire extinguishing component structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the mounting slot of this utility model.

[0024] In the diagram: 1. Cabinet; 2. Charging chamber; 3. Fire extinguishing assembly; 31. Fixing box; 32. Cavity; 33. Agent box; 34. Cooling chamber; 35. Igniter; 36. Nozzle; 37. Through hole; 4. Smoke alarm; 5. Battery charging compartment; 6. Guide rail; 7. Charging position; 8. Cabinet door; 9. Observation window; 10. First fan; 11. Vent; 12. Mounting slot; 13. Charging module power supply; 14. Control module; 15. Control power supply module; 16. Second fan. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1 and 5 This utility model provides a lithium battery charging cabinet for drones, including a cabinet body 1, a charging chamber 2, and a fire extinguishing component 3. The charging chamber 2 is located inside the cabinet body 1, and the fire extinguishing component 3 is installed on the inner top wall of the charging chamber 2. The cabinet body 1 provides a stable installation foundation and overall protective space for the charging chamber 2 and the fire extinguishing component 3, ensuring the orderly layout of all components. The charging chamber 2, located inside the cabinet body 1, is the area for placing and charging the drone's lithium battery, and also provides a close-range installation position for the fire extinguishing component 3 to act on a fire source. The fire extinguishing component 3, installed on the inner top wall of the charging chamber 2, is used to respond to fires.

[0027] The fire extinguishing assembly 3 includes a fixed box 31 installed on the inner top wall of the charging chamber 2. The fixed box 31 has a cavity 32 inside, and an aerosol agent box 33 is installed inside the cavity 32. A cooling chamber 34 for storing coolant is formed between the fixed box 31 and the aerosol agent box 33. An igniter 35 for igniting the aerosol agent is embedded in the top of the fixed box 31. Several sets of nozzles 36 for spraying aerosol agent are installed on the side wall of the aerosol agent box 33 extending through to the outside of the fixed box 31. The fixed box 31 is used to support components such as the cavity 32 and the agent box 33, and provides support for subsequent fire extinguishing actions through its own structure; the cavity 32 is the mounting carrier of the agent box 33, and ensures that the agent box 33 is stable in position within the charging chamber 2 through a limiting effect; the agent box 33 is located inside the cavity 32 and is used to store aerosol fire extinguishing agent; the cooling chamber 34 is formed between the fixed box 31 and the agent box 33, and stores coolant inside to reduce the temperature of the aerosol agent after reaction; the igniter 35 is embedded in the top of the fixed box 31 and is responsible for receiving the trigger signal and igniting the aerosol agent in the agent box 33; the nozzle 36 is installed on the side wall of the agent box 33 and extends through to the outside of the fixed box 31, and is used to evenly spray the reacted fire extinguishing aerosol into the fire source area within the charging chamber 2. When a fire breaks out in the battery inside the charging chamber 2 due to thermal runaway, an external trigger signal is transmitted to the igniter 35, which immediately ignites the aerosol agent in the agent box 33. The agent undergoes a chemical reaction inside the agent box 33, generating a high-temperature aerosol with fire extinguishing properties. The high-temperature aerosol flows from the side wall of the agent box 33 to the nozzle 36. When it passes through the cooling chamber 34, the coolant in the cooling chamber 34 absorbs the heat of the aerosol, reducing its temperature to a safe range and preventing high-temperature damage to other components inside the charging chamber 2. The cooled fire extinguishing aerosol is then evenly sprayed into the charging chamber 2 through several sets of nozzles 36, quickly covering the fire source area and extinguishing the fire by inhibiting the combustion reaction.

[0028] Igniter 35 can be an electrically triggered igniter with a working voltage of 12VDC, a trigger response time of ≤50ms, and an ignition temperature of ≥350℃. The control module 14 of the drone lithium battery charging cabinet is typically powered by 12VDC. Matching the voltage of the igniter and the control module can avoid additional voltage conversion components and simplify circuit design; the trigger response time of ≤50ms can quickly ignite aerosol agents after the smoke alarm 4 detects a fire; the ignition temperature of ≥350℃ can stably ignite common aerosol extinguishing agents and ensure reliable activation of the fire extinguishing component 3.

[0029] In this embodiment, as Figure 4As shown, the side wall of the fixing box 31 has several sets of through holes 37, and each set of nozzles 36 passes through the cooling chamber 34 and is installed inside the corresponding through hole 37. The through holes 37 and the nozzles 36 are matched in size to ensure that each set of nozzles 36 is stably positioned on the fixing box 31 and sprays in a precise direction, preventing the nozzles 36 from shifting due to pressure during aerosol spraying. The nozzles 36 pass through the cooling chamber 34 and are installed inside the corresponding through holes 37 to guide the extinguishing aerosol generated in the agent box 33 to the fire source in the charging chamber 2, and at the same time, form a contact channel with the coolant in the cooling chamber 34 during the process of passing through the cooling chamber 34.

[0030] In a further preferred embodiment, such as Figure 3 As shown, a smoke detector 4 is installed on the inner top wall of the charging chamber 2, located on the side of the fire extinguishing assembly 3. The smoke detector 4 is electrically connected to the fire extinguishing assembly 3. The inner top wall of the charging chamber 2 provides an installation position for the smoke detector 4, ensuring that the smoke detector 4 can detect the fire and smoke in the charging chamber 2 immediately. The smoke detector 4 is used to monitor the smoke concentration in the charging chamber 2 in real time. When the concentration reaches a threshold, it immediately generates an electrical signal and transmits it to the fire extinguishing assembly 3. The fire extinguishing assembly 3 then receives the signal from the smoke detector 4 and initiates internal ignition, spraying, and other fire extinguishing actions.

[0031] The smoke alarm 4 can be a photoelectric smoke alarm with a detection response threshold of ≤0.3dB / m, an operating voltage of 12VDC, and an alarm output method of dry contact signal. In the early stages of lithium battery thermal runaway, a large number of tiny smoke particles are released. The photoelectric detection principle is more sensitive to these particles than the ionization detection principle. The response threshold of ≤0.3dB / m can trigger an alarm when the smoke concentration is low, preventing the fire from spreading. The 12VDC operating voltage matches the power supply 15 of the charging cabinet control module, eliminating the need for an additional power supply module. The dry contact signal output method allows direct electrical connection to the control module 14, ensuring stable signal transmission.

[0032] Furthermore, such as Figure 2 As shown, a battery charging compartment 5 is slidably installed inside the charging cavity 2. The two side walls of the battery charging compartment 5 are slidably connected to the inner side walls of the charging cavity 2 via guide rails 6. Several sets of charging positions 7 are evenly distributed on the upper part of the battery charging compartment 5. The charging cavity 2 provides sliding tracks and installation space for the battery charging compartment 5, ensuring smooth entry and exit within it, while providing a relatively enclosed environment for battery charging. The battery charging compartment 5 is used to hold the drone's lithium batteries. Its structure neatly arranges multiple batteries, preventing mutual interference during charging. The guide rails 6 provide sliding guidance for the battery charging compartment 5, reducing friction between the battery charging compartment 5 and the inner wall of the charging cavity 2, ensuring smooth sliding. The several sets of charging positions 7 evenly distributed on the upper part of the battery charging compartment 5 are dedicated placement units for the lithium batteries. Each charging position 7 corresponds to a charging interface, enabling independent charging of the battery.

[0033] In this embodiment, as Figure 2 As shown, a cabinet door 8 is fixedly installed on the side wall of the battery charging compartment 5. An observation window 9 is embedded in the middle of the cabinet door 8. When the cabinet door 8 is pulled, the battery charging compartment 5 can slide along the inside of the charging cavity 2. The core function of the cabinet door 8 is to seal the charging cavity 2 and facilitate the pulling of the battery charging compartment 5. Through the sealing effect of the cabinet door 8, after the battery charging compartment 5 is pushed into the charging cavity 2, the charging cavity 2 forms a relatively sealed space, reducing the entry of external dust and debris, and at the same time isolating the leakage of flammable gases that may be generated during the charging process. The observation window 9 embedded in its side wall is made of high-temperature resistant and transparent material, which is used to visually observe the charging status of the battery in the charging cavity 2 without opening the cabinet door 8.

[0034] Preferred, such as Figure 3 As shown, the side wall of the cabinet 1 has several sets of windows corresponding to the charging cavity 2, and a first fan 10 is installed inside each set of windows. The several sets of windows on the side wall of the cabinet 1 serve as the mounting carriers for the first fan 10. The first fan 10, installed inside the windows, accelerates air circulation within the charging cavity 2, expelling heat generated by the battery during charging from the outside of the cabinet 1 and preventing the temperature inside the charging cavity 2 from becoming too high. The charging cavity 2 provides the first fan 10 with a heat dissipation target and air circulation space, ensuring that the fan's heat dissipation effect covers the entire battery charging area.

[0035] The first fan 10 can be configured with an air volume of 0.5–1.2 m³ / h. 3 An axial flow fan with a flow rate of 0.5–1.2 m / min, static pressure ≥ 50 Pa, and operating voltage of 12 VDC. 3 An airflow of / min can cover the charging chamber space of common small and medium-sized charging cabinets, which typically has a volume of 1-3m³. 3 A static pressure of ≥50Pa can overcome the airflow resistance caused by the guide rails 6 and battery charging compartment 5 inside the charging chamber 2, ensuring that the airflow can flow evenly through each charging position 7; the 12VDC working voltage is compatible with the power supply of the charging module 13 or the power supply of the control module 15, simplifying wiring.

[0036] In a further preferred embodiment, such as Figure 1 As shown, several sets of air vents 11 are symmetrically arranged on both side walls of the cabinet 1, and these air vents 11 are distributed in an array. The symmetrical arrangement and array distribution of the air vents 11 ensure that external cold air can enter the cabinet 1 evenly and quickly, while also providing air intake channels for heat dissipation of other components inside the cabinet 1. Simultaneously, the air vents 11 assist the first fan 10 and the second fan 16 in achieving air circulation, while also balancing the air pressure inside and outside the cabinet 1, preventing low internal air pressure from affecting the fan's heat dissipation effect.

[0037] In addition, such as Figure 5As shown, the top of the cabinet 1 has a mounting slot 12, inside which the charging module power supply 13, control module 14, and control module power supply 15 are installed sequentially. The mounting slot 12 centrally houses the charging module power supply 13, control module 14, and control module power supply 15, facilitating wiring connections and future maintenance, while preventing direct contact between core electrical components and the battery inside the charging chamber 2, thus reducing the risk of fire. The charging module power supply 13 converts external mains power into voltage and current suitable for battery charging, providing stable power to the charging positions 7 inside the charging chamber 2. The control module 14 receives signals from various sensors, such as the smoke alarm 4, analyzes them, and sends action commands to actuators such as the fire extinguishing assembly 3 and the first fan 10, achieving automated control of the equipment. The control module power supply 15 provides stable operating power to the control module 14, ensuring continuous normal operation during equipment operation, unaffected by power fluctuations in other components.

[0038] Furthermore, such as Figure 5 As shown, the control module 14 is electrically connected to the smoke alarm 4 and the fire extinguishing assembly 3. When the smoke alarm 4 detects smoke, the control module 14 can trigger the igniter 35 to operate. The control module 14 establishes electrical connections with both the smoke alarm 4 and the fire extinguishing assembly 3. Its function is to receive the fire signal from the smoke alarm 4, perform logical judgment, and then send an action command to the fire extinguishing assembly 3 to achieve automated control. The smoke alarm 4 monitors the smoke in the charging chamber 2 in real time through a sensor. When a fire is detected, it generates an electrical signal and transmits it to the control module 14. The fire extinguishing assembly 3 is the actuator. After receiving the command from the control module 14, it initiates the fire extinguishing action. Its internal igniter 35 is the start switch for the fire extinguishing action, responsible for igniting the aerosol agent in the agent box 33 and initiating the fire extinguishing process. When the battery in the charging chamber 2 experiences thermal runaway and generates smoke, the sensor of the smoke alarm 4 detects that the smoke concentration exceeds the threshold and transmits the signal to the control module 14, which is electrically connected to it, via a wire. After receiving the electrical signal, the control module 14 sends a trigger command to the fire extinguishing assembly 3, which is transmitted to the igniter 35 of the fire extinguishing assembly 3 via a wire. After receiving the command, the igniter 35 rapidly heats up its internal heating element, igniting the aerosol agent in the agent box 33. The agent reacts to generate fire extinguishing aerosol, which is cooled by the cooling chamber 34 and then sprayed from the nozzle 36 towards the fire source to achieve automatic fire extinguishing.

[0039] It is worth noting that, such as Figure 5As shown, a second fan 16 is embedded in the mounting slot 12 on the side wall of the cabinet 1. The second fan 16 dissipates heat from the equipment inside the mounting slot 12. The second fan 16 dissipates heat from the charging module power supply 13, control module 14, and control module power supply 15 inside the mounting slot 12, keeping the temperature inside the mounting slot 12 within the safe operating range of the electrical components. This ensures that the charging module power supply 13 outputs power stably and that the control module 14 receives and sends commands normally, preventing equipment shutdown or malfunction due to overheating of core components, thus improving the reliability and service life of the equipment.

[0040] The second fan 16 can be configured with an air volume of 0.2–0.5 m³ / h. 3 An axial flow fan with a flow rate of 0.2–0.5 m / min, static pressure ≥30 Pa, and operating voltage of 12 VDC. 3 An airflow of / min is sufficient to meet the heat dissipation requirements, avoiding excessive airflow that could lead to increased energy consumption; a static pressure of ≥30Pa can overcome the slight airflow resistance caused by wiring and component layout within the mounting slot 12, ensuring that hot air can be smoothly discharged; the 12VDC operating voltage is matched with the control module power supply 15, requiring no additional power supply.

[0041] 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 charging cabinet for drones, comprising a cabinet body, characterized in that: It also includes a charging chamber and a fire extinguishing assembly. The charging chamber is located inside the cabinet, and the fire extinguishing assembly is installed on the inner top wall of the charging chamber. The fire extinguishing assembly includes a fixed box installed on the inner top wall of the charging chamber. The fixed box has an internal cavity, and an aerosol agent container is installed inside the cavity. A cooling chamber for storing coolant is formed between the fixed box and the aerosol agent container. An igniter for igniting the aerosol agent is embedded in the top of the fixed box. Several sets of nozzles for spraying aerosol agent are installed on the side wall of the aerosol agent container extending through to the outside of the fixed box.

2. The drone lithium battery charging cabinet according to claim 1, characterized in that: The side wall of the fixing box has several sets of through holes, and each set of nozzles passes through the cooling chamber and is installed inside the corresponding through hole.

3. The drone lithium battery charging cabinet according to claim 1, characterized in that: A smoke detector is installed on the inner top wall of the charging chamber, located on the side of the fire extinguishing assembly, and the smoke detector is electrically connected to the fire extinguishing assembly.

4. The drone lithium battery charging cabinet according to claim 1, characterized in that: The charging cavity has a battery charging compartment that is slidably installed inside. The two side walls of the battery charging compartment are slidably connected to the two side inner walls of the charging cavity via guide rails. Several sets of charging positions are evenly provided on the upper part of the battery charging compartment.

5. The drone lithium battery charging cabinet according to claim 4, characterized in that: The battery charging compartment has a cabinet door fixedly installed on its side wall, and an observation window is embedded in the middle of the cabinet door. When the cabinet door is pulled, the battery charging compartment can slide along the inside of the charging cavity.

6. The drone lithium battery charging cabinet according to claim 1, characterized in that: The side wall of the cabinet has several sets of windows corresponding to the charging cavity, and a first fan is installed inside each set of windows.

7. The drone lithium battery charging cabinet according to claim 1, characterized in that: The cabinet has several sets of air holes symmetrically opened on both sides, and the air holes are distributed in an array.

8. The drone lithium battery charging cabinet according to claim 1, characterized in that: The top of the cabinet has an installation slot, and the charging module power supply, the control module and the control module power supply are installed in sequence inside the installation slot.

9. The drone lithium battery charging cabinet according to claim 8, characterized in that: The control module is electrically connected to the smoke detector and the fire extinguishing assembly, respectively. When the smoke detector detects smoke, the control module can trigger the igniter.

10. The drone lithium battery charging cabinet according to claim 8, characterized in that: A second fan is embedded in the mounting slot on the side wall of the cabinet, and the second fan can dissipate heat from the equipment in the mounting slot.

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