Fire protection system and charging device

Abstract

The present disclosure relates to a fire extinguishing system and a charging device for fire extinguishing of a battery compartment, the battery compartment having a compartment opening for the battery to enter and exit, the fire extinguishing system comprising an inner water fire extinguishing pipeline and an outer water fire extinguishing pipeline, the inner water fire extinguishing pipeline being provided with an inner water outlet nozzle, the outer water fire extinguishing pipeline being provided with an outer water outlet nozzle, the inner water outlet nozzle being directed to the inside of the battery compartment, the outer water outlet nozzle being directed to the outside of the compartment opening; and a water supply module in communication with the inner water fire extinguishing pipeline and the outer water fire extinguishing pipeline respectively. Through the above technical solution, the inner water outlet nozzle directed to the inside of the battery compartment and the outer water outlet nozzle directed to the outside of the compartment opening can act on the thermal runaway battery separately or jointly, and the battery can be sprayed and cooled, the cooling speed is fast, and the fire extinguishing effect is good.

Description

Technical Field

[0001] This disclosure relates to the field of charging equipment technology, and more specifically, to a fire protection system and a charging device. Background Technology

[0002] Currently, rechargeable batteries are used in various fields, and charging devices such as charging cabinets have also emerged to charge batteries that are low on power. For example, in the field of drones, there are drones that can have their rechargeable batteries replaced, which can improve the utilization rate of drones and eliminate the need for them to stop for charging. For example, drones in the delivery field can use this method of replacing rechargeable batteries because of the high demand for delivering goods.

[0003] Among these, rechargeable batteries used for power are mostly lithium batteries. Related technologies include setting up outdoor charging cabinets to charge replaced lithium batteries. However, during charging, lithium batteries are susceptible to thermal runaway, so the charging cabinets need to be equipped with fire-fighting facilities to ensure safety during battery charging. Generally, inert gas or dry powder fire extinguishers are the primary means of fire suppression. However, for lithium batteries, when the battery cells catch fire, they release oxygen, which fuels the fire. If the temperature of the battery cells is not rapidly reduced after a high-temperature fire, fire control becomes more difficult, and there is a possibility of secondary fires. Therefore, inert gas or dry powder fire extinguishers cannot effectively cool burning lithium batteries, resulting in poor fire-fighting effectiveness. Water is also used as a fire-fighting solution, but water-based fire suppression systems are limited in scope and lack specificity, resulting in poor fire-fighting effectiveness. Summary of the Invention

[0004] The purpose of this disclosure is to provide a fire protection system and a charging device, which are targeted fire protection systems that can at least partially solve the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this disclosure, a fire protection system is provided for fire protection of a battery compartment, the battery compartment having an opening for the batteries to enter and exit, the fire protection system comprising:

[0006] The system includes internal and external fire-fighting pipelines. The internal fire-fighting pipeline is equipped with internal water outlet nozzles, and the external fire-fighting pipeline is equipped with external water outlet nozzles. The internal water outlet nozzles point towards the interior of the battery compartment, and the external water outlet nozzles point towards the exterior of the compartment opening.

[0007] A water supply module, which is connected to both the internal water fire-fighting pipeline and the external water fire-fighting pipeline.

[0008] Optionally, the water supply module includes a water storage tank and a pressure-holding pump. The inlet of the pressure-holding pump is connected to the water storage tank, and the internal water fire-fighting pipeline and the external water fire-fighting pipeline are connected in parallel to the outlet of the pressure-holding pump to obtain pressurized water from the pressure-holding pump.

[0009] Optionally, the internal water fire-fighting pipeline and the external water fire-fighting pipeline are connected in parallel to the outlet of the pressure-holding pump via a water flow detection pipeline. The water flow detection pipeline is equipped with a water flow detection switch for detecting changes in water flow, and the water flow detection switch is electrically connected to the pressure-holding pump.

[0010] Optionally, the fire protection system further includes a water distribution valve, which has an inlet connected to the water flow detection pipeline, a first outlet connected to the internal water fire protection pipeline, a second outlet connected to the external water fire protection pipeline, and an inspection port connected to the water storage tank via an inspection pipeline. The water storage tank and the inspection port can be disconnected in a connected manner via an operable inspection valve core.

[0011] Optionally, the internal water outlet nozzle and / or the external water outlet nozzle are configured as fire sprinklers, wherein the fire sprinkler is equipped with a sensor for sensing temperature or smoke, used to open the fire sprinkler when the temperature or smoke exceeds a threshold; or,

[0012] The internal water outlet nozzle and / or the external water outlet nozzle are constructed as pipe nozzles. Correspondingly, the internal water fire-fighting pipeline and / or the external water fire-fighting pipeline are equipped with a thermal wire and an electromagnetic switch valve. The thermal wire is arranged in a serpentine pattern inside the battery compartment and / or at the opening of the battery compartment and is electrically connected to the electromagnetic switch valve. The electromagnetic switch valve is used to control the on / off state of the pipeline equipped with the pipe nozzle.

[0013] According to a second aspect of this disclosure, a charging device is provided, comprising:

[0014] The main body and fire protection system, wherein the main body has a battery compartment for storing batteries and / or charging the batteries.

[0015] Optionally, a fire water collection tray is provided inside the main body, the battery compartment is installed inside the fire water collection tray, the fire water collection tray is connected to the water supply module through a return water pipe, and a water filtration device is provided inside the return water pipe.

[0016] Optionally, multiple charging boxes are arranged along the height direction inside the main body, and each charging box is provided with multiple battery compartments. Adjacent charging boxes are separated by fireproof sealing material.

[0017] Optionally, the charging box includes a charging chamber and a heat dissipation chamber. The battery compartment is located in the charging chamber, and the heat dissipation chamber is located on the rear side of the compartment opposite to the opening of the battery compartment. A heat dissipation cavity is formed inside the charging box, and an exhaust fan is installed on the side wall of the heat dissipation cavity, with heat dissipation holes.

[0018] Optionally, the external water fire-fighting pipeline includes a first main pipe extending along the height direction of the main body, with a plurality of first branch pipes arranged in parallel on the first main pipe, each first branch pipe corresponding to a battery compartment and equipped with an external water nozzle corresponding to the battery compartment of that layer, and each first branch pipe extending along the compartment opening side of the plurality of battery compartments on the same layer.

[0019] The internal water fire-fighting pipeline includes a second main pipe with multiple second branch pipes connected in parallel. Each second branch pipe corresponds to a battery compartment and extends into the battery compartment from the tail side opposite to the compartment opening side. The pipe section of the second branch pipe located inside the battery compartment passes through multiple battery compartments on the same floor in sequence and is equipped with the internal water outlet nozzle corresponding to each battery compartment.

[0020] Through the above technical solution, the fire protection system in the charging device provided in this disclosure includes internal water fire protection pipelines and external water fire protection pipelines, which can spray the inside of the battery compartment and the outside of the compartment opening in a targeted manner according to the fire situation. That is, the internal water nozzles and the external water nozzles can act individually or jointly on different locations of the thermally runaway battery to spray and cool it down in a targeted manner. The cooling speed is fast and the fire protection effect is good.

[0021] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the charging device provided in an exemplary embodiment of this disclosure;

[0024] Figure 2 This is a schematic diagram of the overall structure of the internal water fire-fighting pipeline and the external water fire-fighting pipeline provided in the exemplary embodiments of this disclosure;

[0025] Figure 3 This is a schematic diagram of the structure of the internal water fire-fighting pipeline and the external water fire-fighting pipeline provided in the exemplary embodiment of this disclosure, which are connected to the pressure-holding pump through a water flow detection pipeline;

[0026] Figure 4This is a schematic diagram of the internal structure of the charging box provided in an exemplary embodiment of this disclosure.

[0027] Explanation of reference numerals in the attached figures

[0028] 1. Main body; 11. Charging box; 111. Charging chamber; 112. Heat dissipation chamber; 1121. Exhaust fan; 1122. Heat dissipation hole; 2. Battery compartment; 21. Compartment opening; 3. Fire protection system; 31. Internal water fire protection pipeline; 311. Internal water outlet nozzle; 312. Second main pipe; 313. Second branch pipe; 32. External water fire protection pipeline; 321. External water outlet nozzle; 322. First main pipe; 323. First branch pipe; 33. Water storage tank; 34. Pressure holding pump; 35. Water flow detection pipeline; 351. Water flow detection switch; 36. Divider valve; 37. Maintenance pipeline; 371. Maintenance valve core; 38. Thermal wire; 381. Electromagnetic switch valve; 39. Fire water collection tray; 391. Return water pipe; 4. Protective plate. Detailed Implementation

[0029] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0030] In this disclosure, unless otherwise stated, "inner" and "outer" refer to the interior and exterior of the outline of the corresponding component; "far" and "near" refer to the distance of the corresponding component relative to another component in terms of spatial position. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance. When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0031] The fire protection system and charging device in the exemplary embodiments of this disclosure will now be described with reference to the accompanying drawings.

[0032] According to the first aspect of this disclosure, referring to Figures 1 to 4 This disclosure provides a fire protection system for a battery compartment. The battery compartment 2 has an opening 21 for batteries to enter and exit. The fire protection system 3 includes an internal water fire protection pipe 31 and an external water fire protection pipe 32, as well as a water supply module connected to the internal water fire protection pipe 31 and the external water fire protection pipe 32 respectively. The internal water fire protection pipe 31 is provided with an internal water outlet nozzle 311, and the external water fire protection pipe 32 is provided with an external water outlet nozzle 321. The internal water outlet nozzle 311 points to the inside of the battery compartment 2, and the external water outlet nozzle 321 points to the outside of the opening 21.

[0033] Through this technical solution, the fire protection system 3 sprays water onto the interior of the battery compartment 2 and the exterior of the compartment opening 21 via internal water outlet nozzles 311 and external water outlet nozzles 321, respectively, to rapidly cool down the battery in thermal runaway. Here, "direction" as used in this disclosure refers to the direction in which fire water from the internal water outlet nozzles 311 and external water outlet nozzles 321 can reach the target area. Spraying water onto the interior of the battery compartment 2 can extinguish or cool down fires inside the battery, while spraying water onto the exterior of the compartment opening 21 can extinguish or cool down fires that occur at the opening 21. In some embodiments, this is because the exposed portion of the rechargeable battery during charging is often an area with a cover containing many components, where fire hazards are more likely to occur first. Therefore, specifically setting an external water outlet nozzle 321 pointing towards the exterior of the compartment opening 21 provides high targeting.

[0034] Specifically, when the battery experiences thermal runaway and its temperature rises, the internal water nozzle 311 and the external water nozzle 321 can spray water onto the inside of the battery compartment 2 and the outside of the compartment opening 21 in a targeted manner, depending on the specific location of the battery temperature rise. That is, the internal water nozzle 311 and the external water nozzle 321 can controllably act alone or together on the temperature rise location of the thermally runaway battery to spray and cool it down in a targeted manner, so as to cool down the thermally runaway battery quickly and effectively.

[0035] In some embodiments, such as Figure 2 and Figure 3 As shown, the water supply module includes a water storage tank 33 and a pressure-holding pump 34. The inlet of the pressure-holding pump 34 is connected to the water storage tank 33. The internal water fire-fighting pipeline 31 and the external water fire-fighting pipeline 32 are connected in parallel to the outlet of the pressure-holding pump 34 to obtain pressurized water from the pressure-holding pump 34. Thus, when the battery experiences thermal runaway and its temperature rises, the corresponding internal water outlet nozzle 311 and external water outlet nozzle 321 can spray fire-fighting water. At this time, due to the presence of the pressure-holding pump 34, the fire-fighting water in the water storage tank 33 continuously supplies water to the nozzles under the action of the pressure-holding pump 34, thereby ensuring the fire-fighting effect. It is understood that in some other possible embodiments not shown in the accompanying drawings, the water storage tank 33 can also be an external pipeline, that is, the inlet of the pressure-holding pump 34 is connected to the outlet of the external pipeline, and the inlet of the external pipeline is connected to an external water source. Therefore, fire-fighting water can also be supplied to the internal water fire-fighting pipeline 31 and the external water fire-fighting pipeline 32 through an external water source. This disclosure does not limit this.

[0036] Specifically, the fire-fighting water in the water storage tank 33 can be controlled to flow independently through the internal fire-fighting water pipeline 31 under the action of the pressure-holding pump 34, and spray onto the inside of the battery compartment 2 through the internal water outlet nozzle 311. Alternatively, the fire-fighting water in the water storage tank 33 can be controlled to flow independently through the external fire-fighting water pipeline 32 under the action of the pressure-holding pump 34, and spray onto the outside of the compartment opening 21 through the external water outlet nozzle 321. Or, the fire-fighting water in the water storage tank 33 can flow independently through the internal fire-fighting water pipeline 31 and the external fire-fighting water pipeline 32 under the action of the pressure-holding pump 34, and spray onto the inside of the battery compartment 2 and the outside of the compartment opening 21 through the internal water outlet nozzle 311 and the external water outlet nozzle 321 respectively, so as to achieve rapid cooling of the battery.

[0037] In some embodiments, such as Figure 2 and Figure 3 As shown, the internal water fire-fighting pipeline 31 and the external water fire-fighting pipeline 32 are connected in parallel to the outlet of the pressure-holding pump 34 via a water flow detection pipeline 35. A water flow detection switch 351 for detecting changes in water flow is installed on the water flow detection pipeline 35. The water flow detection switch 351 is electrically connected to the pressure-holding pump 34, meaning that the pressure-holding pump 34 does not need to work continuously, but is controlled by the water flow detection switch 351. When a sprinkler sprays fire-fighting water, causing water flow in the fire-fighting pipeline, the water flow detection switch 351 can control the pressure-holding pump 34 to start through the detected water flow signal, thereby continuously providing pressurized water to the corresponding fire-fighting pipeline. In some possible variations, the pressure-holding pump 34 can also be in a working state to continuously provide pressure, which is not limited in this disclosure.

[0038] In some embodiments, for the convenience of connecting the internal water fire-fighting pipe 31 and the external water fire-fighting pipe 32, such as Figure 2 and Figure 3 As shown, the fire protection system 3 also includes a water distribution valve 36, which has an inlet connected to the water flow detection pipe 35, a first outlet connected to the internal fire protection pipe 31, and a second outlet connected to the external fire protection pipe 32. This allows pressurized water to be supplied to both the internal fire protection pipe 31 and the external fire protection pipe 32 simultaneously. Specifically, when the battery experiences thermal runaway and the temperature rises, fire water flows from the water storage tank 33 through the water flow detection pipe 35 and into the water distribution valve 36 through the inlet. It can be controlled to flow into at least one of the internal fire protection pipe 31 through the first outlet and into the external fire protection pipe 32 through the second outlet. The first outlet and the second outlet do not interfere with each other.

[0039] In some embodiments, the water distribution valve 36 also includes an inspection port connected to the water storage tank 33 via an inspection pipe 37, and the water storage tank 33 and the inspection port are connectably disconnected via an operable inspection valve core 371.

[0040] Thus, when inspecting the fire protection system 3, the inspection valve core 371 can be operated to connect the inspection port to the water storage tank 33. Fire water flows through the inspection port and through the inspection pipe 37 into the water storage tank 33. The fire water in the water flow detection pipe 35 flows. If the water flow detection switch 351 can sense the water flow and transmit the signal to the pressure holding pump 34, the pressure holding pump 34 will be turned on to enter the working state. Fire water will be supplied from the water storage tank 33 through the water flow detection pipe 35, flow into the inlet of the water distribution valve 36, pass through the inspection port and through the inspection pipe 37 into the water storage tank 33. At this time, the fire protection system 3 is normal. If there is no continuous flow of fire water, the fire protection system 3 should be inspected.

[0041] In some embodiments, the water distribution valve 36 can also be constructed as a combination valve. For example, in one embodiment, the water distribution valve 36 includes a first three-way valve and a second three-way valve. The inlet of the first three-way valve is connected to the water flow detection pipeline 35 to form the inlet of the water distribution valve 36. The first outlet of the first three-way valve is connected to the internal water fire-fighting pipeline 31 to form the first outlet of the water distribution valve 36. The first outlet of the first three-way valve is connected to the inlet of the second three-way valve. The inlet of the second three-way valve is connected to the external water fire-fighting pipeline 32 to form the second outlet of the water distribution valve 36. The second outlet of the second three-way valve is connected to the maintenance pipeline 37 to form the maintenance port of the water distribution valve 36. This disclosure is not limited thereto.

[0042] In some embodiments, to improve charging efficiency, the battery compartment 2 is typically arranged in multiple layers along the height direction of the main body 1, and each layer has multiple battery compartments 2. Multiple internal water nozzles 311 and multiple external water nozzles 321 are respectively arranged in a one-to-one correspondence with the multiple battery compartments 2, thereby providing a fire-fighting function for each battery compartment 2; in some embodiments, such as Figure 2 and Figure 4 As shown, when there are two rows of battery compartments 2 on the same floor along the height direction, the water spray nozzles 321 can be installed only outside the opening 21 of the top row of battery compartments 2. In this way, when a fire occurs at the opening 21 below, the fire can be extinguished by the fire water that flows down due to gravity sprayed from the top water spray nozzle 321, without the need to install a corresponding water spray nozzle 321 outside each opening 21.

[0043] In an embodiment with multiple battery compartments 2 along the height direction, in order to facilitate the arrangement of pipelines, the external water fire protection pipeline 32 includes a first main pipe 322 extending along the height direction of the main body 1. Multiple first branch pipes 323 are connected in parallel on the first main pipe 322. Each first branch pipe 323 corresponds to one layer of battery compartment 2 and is equipped with an external water nozzle 321 corresponding to that layer of battery compartment 2, thereby providing external water to each layer of battery compartment 2. Optionally, each first branch pipe 323 extends along the compartment opening 21 side of multiple battery compartments 2 on the same layer, thereby facilitating fire protection for each compartment opening 21.

[0044] The internal water supply fire hydrant system includes a second main pipe 312, the outlet of which is connected in parallel to multiple second branch pipes 313. Each second branch pipe 313 corresponds to a battery compartment 2, thereby supplying water to the interior of each battery compartment 2. To avoid conflict with the arrangement of the first branch pipe 323, the second branch pipe 313 optionally extends into the battery compartment 2 from the rear side opposite to the compartment opening 21. The pipe section of the second branch pipe 313 inside the battery compartment 2 passes through multiple battery compartments 2 on the same floor and is equipped with an internal water supply nozzle 311 corresponding to each battery compartment 2. The number of internal water supply nozzles 311 inside each battery compartment 2 can be set arbitrarily. Optionally, such as... Figure 4 As shown, the internal water nozzles 311 can be symmetrically arranged on both sides of the second branch pipe 313 and face the internal opening of the battery compartment 2. Multiple pairs of internal water nozzles 311 can be provided in the same battery compartment 2. In addition, in an embodiment not shown in the figures, the internal water nozzle 311 can also be set as one and directly connected to the second branch pipe 313, and facing the internal opening of the battery compartment 2. This disclosure does not limit this.

[0045] In some embodiments, in order to achieve independent control of the inner and outer nozzles, such as Figure 2 and Figure 4 As shown, the internal water outlet sprinkler head 311 and / or the external water outlet sprinkler head 321 are configured as fire sprinklers. Typically, the fire sprinkler head contains a sensor for sensing temperature or smoke, used to activate the fire sprinkler head when the temperature or smoke exceeds a threshold. Specifically, as a known technology, the sensor can be a liquid-filled thermistor glass bulb containing solutions such as kerosene or ethanol. When the battery experiences thermal runaway and the temperature rises, the liquid inside the thermistor glass bulb begins to expand. Once the temperature exceeds the threshold, the liquid ruptures the thermistor glass bulb, at which point fire water from the fire hydrant is sprayed out to rapidly cool the thermally runaway battery.

[0046] In other embodiments, the internal water outlet nozzle 311 and / or the external water outlet nozzle 321 can also be configured as a pipe nozzle. In this case, a thermal wire 38 and an electromagnetic switch valve 381 are installed on the corresponding internal water fire-fighting pipe 31 or external water fire-fighting pipe 32. The thermal wire 38 is arranged in a serpentine pattern inside the battery compartment 2 and / or at the opening 21 of the battery compartment 2 and is electrically connected to the electromagnetic switch valve 381. The electromagnetic switch valve 381 is used to control the opening and closing of the pipe with the pipe nozzle. Specifically, the thermal wire 38 can be composed of a wire and a layer of thermally sensitive material. When the battery experiences thermal runaway and the ambient temperature rises, the thermally sensitive material will thermally expand, causing the thermal wire 38 to deform or even spontaneously combust. This signal is then transmitted to the electromagnetic switch valve 381 to open the fire-fighting pipe, and the pipe nozzle sprays fire-fighting water to quickly cool the thermally runaway battery.

[0047] It should be noted that the severity of thermal runaway varies depending on the energy density of the battery. The higher the energy density of the battery, the more severe the thermal runaway. Therefore, the internal water nozzle 311 and the external water nozzle 321 can be constructed with different nozzle structures according to the energy density of the battery.

[0048] For example, in one embodiment, such as Figure 2 and Figure 4 As shown, the external water nozzle 321 is constructed as a fire sprinkler, and the internal water nozzle 311 is constructed as a pipe sprinkler. The thermal wire 38 can be linearly arranged inside the battery compartment 2 along the extension direction of the second branch pipe 313. Optionally, the thermal wire 38 can also be arranged in a serpentine pattern inside each battery compartment 2 to detect the internal temperature of the battery compartment 2 more over a wider range and more accurately. When the battery thermally runs away and the temperature continues to rise until it exceeds the threshold of the sensing element inside the fire sprinkler, the fire sprinkler opens and sprays water onto the outside of the compartment opening 21 to cool the battery. If the battery temperature continues to rise, the thermal wire 38 inside the battery compartment 2 melts and transmits a signal to the electromagnetic switch valve 381. The electromagnetic switch valve 381 opens to connect the internal water outlet pipe with the pipe sprinkler, and the pipe sprinkler sprays water onto the inside of the battery compartment 2 to cool the battery.

[0049] It is understandable that, in order to facilitate the insertion or removal of the battery from the battery compartment 2, the battery handle should face outwards. Generally, the battery management system (BMS) is installed near the handle inside the battery. During the charging process, thermal runaway is most likely to occur here first. Therefore, in the above embodiment, the threshold temperature of the fire sprinkler head is lower than the auto-ignition temperature of the thermal wire 38.

[0050] In an embodiment not shown in the accompanying drawings, when the energy density of the battery is low, both the external water nozzle 321 and the internal water nozzle 311 can be configured as fire sprinklers. When the battery experiences thermal runaway and the temperature continues to rise until it exceeds the threshold of the sensor in the fire sprinkler of the external water fire pipeline 32, the fire sprinkler opens and sprays water onto the outside of the compartment 21 to cool the battery. If the battery temperature continues to rise until it exceeds the threshold of the sensor in the fire sprinkler of the internal water fire pipeline 31, the fire sprinkler opens and sprays water onto the inside of the battery compartment 2 to cool the battery.

[0051] It should be noted that the above embodiments only exemplarily disclose a situation where the battery handle faces outward during charging, and a BMS battery management system prone to thermal runaway is installed inside the battery near the handle. Accordingly, the external water fire suppression system 32 sprays water to cool the battery first, while the internal water fire suppression system 31 sprays water to cool the battery later. Furthermore, regarding the situation where the portion of the battery located inside the battery compartment 2 is prone to thermal runaway, correspondingly, for example, as... Figure 2 and Figure 4As shown, the external water nozzle 321 can be configured as a fire sprinkler, and the internal water nozzle 311 can be configured as a pipe nozzle. The auto-ignition temperature of the heat-sensitive wire 38 should be lower than the threshold temperature of the fire sprinkler, that is, the preset temperature at which the internal water fire pipeline 31 starts spraying water to cool the battery is lower than the preset temperature at which the external water fire pipeline 32 starts spraying water to cool the battery. This disclosure is not limited thereto.

[0052] According to the second aspect of this disclosure, referring to Figure 1 and Figure 2 The present disclosure provides a charging device, including a main body 1 and a fire protection system 3. The main body 1 has a battery compartment 2, which is used to store batteries and / or charge batteries.

[0053] Specifically, in some embodiments, such as Figure 1 and Figure 2 As shown, the charging device can be a charging cabinet, with the main body 1 forming a cabinet. The cabinet contains multiple battery compartments 2 for charging the lithium batteries of drones. A protective plate 4 is connected to the top of the cabinet to protect the cabinet from rain and sun. Optionally, the protective plate 4 is provided with a parking area for drones to facilitate the placement of drones while charging their lithium batteries.

[0054] In some embodiments, such as Figure 2 and Figure 3 As shown, a fire water collection tray 39 is provided inside the main body 1, and a battery compartment 2 is installed inside the fire water collection tray 39. The fire water collection tray 39 is connected to the water supply module through a return water pipe 391, and a water filter device is provided inside the return water pipe 391.

[0055] Specifically, taking the water supply module including the water storage tank 33 as an example, fire water sprayed from the external water nozzle 321 flows into the fire water collection tray 39 from the outside of the compartment 21, and fire water sprayed from the internal water nozzle 311 flows out from the inside of the battery compartment 2 through the compartment 21 and into the fire water collection tray 39. Then, the fire water in the fire water collection tray 39 flows back to the water storage tank 33 through the return water pipe 391, so that the fire water can be recycled and the utilization rate can be improved. In the embodiment of the multi-layer battery compartment 2, the return water pipe 391 may also have a main pipe and branch pipes, with one branch pipe corresponding to each layer, so that the fire water from each layer can be collected into the main pipe and flow back to the water storage tank 33. Optionally, a water filter device is installed in the return water pipe 391 to filter impurities in the returned fire water, so as to reduce the possibility of impurities clogging the internal fire water pipe 31 and the external fire water pipe 32, and protect the internal fire water pipe 31 and the external fire water pipe 32.

[0056] Meanwhile, a low water level detector is installed in the water tank to issue an alarm when the fire water level in the water storage tank 33 is too low. Then, fire water needs to be added to the inside and outside of the water storage tank 33 to ensure that the fire water volume in the water storage tank 33 is sufficient to meet the fire water volume requirements for cooling the battery in the event of thermal runaway.

[0057] In some embodiments, such as Figure 2 As shown, multiple charging boxes 11 are arranged along the height direction inside the main body 1. Each charging box 11 is provided with multiple battery compartments 2. Adjacent charging boxes 11 are separated by fireproof sealing material.

[0058] When a battery in one of the battery compartments 2 within a charging box 11 experiences thermal runaway, during the cooling process, fire-fighting water and any open flames that may be generated during battery thermal runaway are separated from the adjacent charging box 11 by fire-resistant sealing material. This is to prevent open flames or fire-fighting water from affecting the normal charging of the batteries in the adjacent charging box 11. The fire-resistant sealing material can be constructed as an aerogel pad, etc.

[0059] In some embodiments, such as Figure 2 and Figure 4 As shown, the charging box 11 includes a charging chamber 111 and a heat dissipation chamber 112. The battery compartment 2 is located inside the charging chamber 111, and the heat dissipation chamber 112 is located on the rear side of the compartment opposite to the opening 21 of the battery compartment. A heat dissipation cavity is formed inside the charging box 11. An exhaust fan 1121 is installed on the side wall of the heat dissipation cavity, and heat dissipation holes 1122 are provided.

[0060] During the charging process, the heat generated diffuses from the charging chamber 111 into the heat dissipation cavity and is discharged by the exhaust fan 1121 and heat dissipation holes 1122, so as to dissipate heat from the inside of the charging box 11 and reduce the temperature inside the charging box 11 to a certain extent, thereby reducing the possibility of thermal runaway of the battery.

[0061] The charging device provided in this disclosure is equipped with a highly targeted fire-fighting system. When the battery experiences thermal runaway and the temperature rises near the opening 21, fire-fighting water flows through the first main pipe 322 and into the corresponding first branch pipe 323. It then sprays out from the outlet water nozzle 321 corresponding to the battery compartment 2 where the thermally runaway battery is located, so as to spray the outside of the opening 21 of the battery compartment 2, thereby rapidly cooling the thermally runaway battery.

[0062] When the battery experiences thermal runaway and the temperature rises inside the battery compartment 2, fire water flows through the second main pipe 312 and into the corresponding second branch pipe 313. It then sprays out from the inner water nozzle 311 corresponding to the battery compartment 2 where the thermally runaway battery is located, so as to spray the inside of the battery compartment 2 and thus quickly cool down the thermally runaway battery.

[0063] Understandably, when the battery thermal runaway phenomenon is severe, fire-fighting water can be sprayed from the corresponding external water nozzle 321 and internal water nozzle 311 of the battery compartment 2 where the thermally runaway battery is located, so as to act on both the outside of the compartment opening 21 and the inside of the battery compartment 2 at the same time, and to quickly cool down the thermally runaway battery.

[0064] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0065] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0066] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A fire protection system, characterized in that, Fire protection for a battery compartment, the battery compartment having an opening for battery entry and exit, the fire protection system comprising: The system includes internal and external fire-fighting pipelines. The internal fire-fighting pipeline is equipped with internal water outlet nozzles, and the external fire-fighting pipeline is equipped with external water outlet nozzles. The internal water outlet nozzles point towards the interior of the battery compartment, and the external water outlet nozzles point towards the exterior of the compartment opening. A water supply module is connected to both the internal fire-fighting pipeline and the external fire-fighting pipeline. The water supply module includes a water storage tank and a pressure-holding pump. The inlet of the pressure-holding pump is connected to the water storage tank, and the internal fire-fighting pipeline and the external fire-fighting pipeline are connected in parallel to the outlet of the pressure-holding pump to obtain pressurized water from the pressure-holding pump.

2. The fire protection system according to claim 1, characterized in that, The internal water fire-fighting pipeline and the external water fire-fighting pipeline are connected in parallel to the outlet of the pressure-holding pump through a water flow detection pipeline. The water flow detection pipeline is equipped with a water flow detection switch for detecting changes in water flow, and the water flow detection switch is electrically connected to the pressure-holding pump.

3. The fire protection system according to claim 2, characterized in that, The fire protection system also includes a water distribution valve, which has an inlet connected to the water flow detection pipeline, a first outlet connected to the internal water fire protection pipeline, a second outlet connected to the external water fire protection pipeline, and an inspection port connected to the water storage tank via an inspection pipeline. The water storage tank and the inspection port can be disconnected in a connected manner via an operable inspection valve core.

4. The fire protection system according to any one of claims 1-3, characterized in that, The internal water outlet sprinkler and / or the external water outlet sprinkler are configured as fire sprinklers, and the fire sprinkler is equipped with a sensor for sensing temperature or smoke, used to open the fire sprinkler when the temperature or smoke exceeds a threshold; or... The internal water outlet nozzle and / or the external water outlet nozzle are constructed as pipe nozzles. Correspondingly, the internal water fire-fighting pipeline and / or the external water fire-fighting pipeline are equipped with a thermal wire and an electromagnetic switch valve. The thermal wire is arranged in a serpentine pattern inside the battery compartment and / or at the opening of the battery compartment and is electrically connected to the electromagnetic switch valve. The electromagnetic switch valve is used to control the on / off state of the pipeline equipped with the pipe nozzle.

5. A charging device, characterized in that, include: The main body has a battery compartment inside, which is used to store batteries and / or charge the batteries. as well as The fire protection system according to any one of claims 1-4.

6. The charging device according to claim 5, characterized in that, The main body is equipped with a fire water collection tray, the battery compartment is installed in the fire water collection tray, the fire water collection tray is connected to the water supply module through a return water pipe, and a water filtration device is installed in the return water pipe.

7. The charging device according to claim 5 or 6, characterized in that, Multiple charging boxes are arranged along the height direction inside the main body, and multiple battery compartments are provided in each charging box. Adjacent charging boxes are separated by fireproof sealing material.

8. The charging device according to claim 7, characterized in that, The charging box includes a charging chamber and a heat dissipation chamber. The battery compartment is located in the charging chamber, and the heat dissipation chamber is located on the rear side of the compartment opposite to the opening of the battery compartment. A heat dissipation cavity is formed inside the charging box, and an exhaust fan is installed on the side wall of the heat dissipation cavity, with heat dissipation holes.

9. The charging device according to claim 7, characterized in that, The external water fire-fighting pipeline includes a first main pipe extending along the height direction of the main body. The first main pipe has multiple first branch pipes arranged in parallel. Each first branch pipe corresponds to a battery compartment and is equipped with an external water nozzle that corresponds one-to-one with the battery compartment. Each first branch pipe extends along the compartment opening side of multiple battery compartments on the same floor. The internal water fire-fighting pipeline includes a second main pipe with multiple second branch pipes connected in parallel. Each second branch pipe corresponds to a battery compartment and extends into the battery compartment from the tail side opposite to the compartment opening side. The pipe section of the second branch pipe located inside the battery compartment passes through multiple battery compartments on the same floor in sequence and is equipped with the internal water outlet nozzle corresponding to each battery compartment.

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