Fire extinguishing system and charging device

Abstract

The fire fighting system and the charging device are used for fire fighting of a battery bin, the battery bin is provided with a bin opening allowing a battery to enter and exit, the fire fighting system comprises an inner water fire fighting pipeline and an outer water fire fighting pipeline, the inner water fire fighting pipeline is provided with an inner water outlet nozzle, and the outer water fire fighting pipeline is provided with an outer water outlet nozzle. The inner water outlet nozzle points to the interior of the battery compartment, and the outer water outlet nozzle points to the exterior of the compartment opening; and the water supply module is respectively communicated with the internal water fire-fighting pipeline and the external water fire-fighting pipeline. According to the technical scheme, the inner water outlet spray head pointing to the interior of the battery compartment and the outer water outlet spray head pointing to the exterior of the compartment opening can independently or jointly act on a thermal runaway battery, spraying cooling is conducted on the thermal runaway battery, the cooling speed is high, and the fire fighting effect is good.

Description

Technical Field

[0001] The present disclosure relates to the technical field of charging equipment, and in particular, to a fire protection system and a charging device. Background Art

[0002] At present, rechargeable batteries have been used in various fields, and charging devices such as charging cabinets have also emerged, which can charge rechargeable batteries with insufficient power. For example, in the field of drones, there is also a drone that can replace rechargeable batteries, thereby increasing the utilization rate of drones without the need to shut down for charging. For example, drones in the delivery field can use this method of replacing rechargeable batteries because of the large demand for delivery items.

[0003] Among them, lithium batteries are mostly used as rechargeable batteries for power. In the related art, an outdoor charging cabinet can be set up to charge the replaced lithium batteries, but during the charging process, the lithium batteries may have thermal runaway, so the charging cabinet needs to be equipped with fire-fighting facilities to ensure the safety of the battery during charging. In general, inert gas or dry powder fire extinguishers are used as the main means of fire fighting, but as far as lithium batteries are concerned, oxygen will be released after the battery core catches fire, which will fuel the fire. If the temperature cannot be cooled down in time after the high-temperature fire so that the temperature of the battery core part can be quickly reduced, the fire control will be more difficult, and there is also the possibility of secondary fire. Therefore, inert gas or dry powder fire extinguishers cannot effectively cool down the catching lithium battery, and the fire fighting effect is poor. In addition, there is a solution of using water as a fire extinguisher, but the water fire fighting system is single, poorly targeted, and the fire fighting effect is not good. Summary of the invention

[0004] The purpose of the present disclosure is to provide a fire fighting system and a charging device, which is a well-targeted fire fighting system and can at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present disclosure, a fire fighting system is provided for fire fighting in a battery compartment, wherein the battery compartment has a compartment opening for the batteries to enter and exit, and the fire fighting system comprises:

[0006] an inner water fire fighting pipeline and an outer water fire fighting pipeline, wherein the inner water fire fighting pipeline is provided with an inner water outlet nozzle, and the outer water fire fighting pipeline is provided with an outer water outlet nozzle, wherein the inner water outlet nozzle points to the inside of the battery compartment, and the outer water outlet nozzle points to the outside of the compartment opening; and

[0007] A water supply module is connected to the inner water fire fighting pipeline and the outer water fire fighting pipeline respectively.

[0008] Optionally, the water supply module includes a water tank and a pressure-maintaining pump, the inlet of the pressure-maintaining pump is connected to the water 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-maintaining pump to obtain pressurized water from the pressure-maintaining pump.

[0009] Optionally, the inner water fire fighting pipeline and the outer water fire fighting pipeline are connected in parallel to the outlet of the pressure maintaining pump through a water flow detection pipeline, and a water flow detection switch for detecting water flow changes is provided on the water flow detection pipeline, and the water flow detection switch is electrically connected to the pressure maintaining pump.

[0010] Optionally, the fire protection system also includes a water diversion valve, which has a water inlet connected to the water flow detection pipeline, a first water outlet connected to the internal water fire protection pipeline, a second water outlet connected to the external water fire protection pipeline, and an inspection port connected to the water tank through an inspection pipeline, and the water tank and the inspection port can be connected and disconnected by an operable inspection valve core.

[0011] Optionally, the inner water nozzle and / or the outer water nozzle is configured as a fire sprinkler, wherein a sensing element for sensing temperature or smoke is provided in the fire sprinkler, and is used to open the fire sprinkler when the temperature or smoke exceeds a threshold value; or,

[0012] The inner water nozzle and / or the outer water nozzle are constructed as pipe nozzles. Correspondingly, the inner water fire-fighting pipeline and / or the outer water fire-fighting pipeline are provided with a thermistor and an electromagnetic switch valve. The thermistor is arranged in a serpentine shape inside the battery compartment and / or at the compartment 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 of the pipeline provided with the pipe nozzle.

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

[0014] A main body and a fire fighting system, wherein a battery compartment is constructed in the main body, and the battery compartment is used to store batteries and / or charge the batteries.

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

[0016] Optionally, a plurality of charging boxes are arranged in the height direction in the main body, a plurality of battery compartments are provided in each charging box, and two adjacent charging boxes are separated by fire-proof sealing materials.

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

[0018] Optionally, the external water fire fighting pipeline includes a first main pipe extending in the height direction of the main body, the first main pipe is provided with a plurality of first branch pipes arranged in parallel, each first branch pipe corresponds to a layer of battery compartments, and is provided with the external water sprinkler heads corresponding to the battery compartments of the layer one by one, and each first branch pipe extends along the compartment opening side of the plurality of battery compartments of the same layer;

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

[0020] Through the above technical scheme, the fire-fighting system in the charging device provided by the present invention includes an internal water fire-fighting pipeline and an external water fire-fighting pipeline, which can spray the inside of the battery compartment and the outside of the compartment opening in a targeted manner according to the fire-fighting situation, that is, the internal water nozzle and the external water nozzle can act individually or jointly on different positions of the battery in thermal runaway, and spray and cool it down in a targeted manner, with a fast cooling speed and good fire-fighting effect.

[0021] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

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

[0024] Figure 2 It 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 embodiment of the present disclosure;

[0025] Figure 3 It is a schematic diagram of a structure in which an inner water fire fighting pipeline and an outer water fire fighting pipeline provided in an exemplary embodiment of the present disclosure are connected to a pressure maintaining pump through a water flow detection pipeline;

[0026] Figure 4Schematic diagram of the structure inside the charging box provided in an exemplary embodiment of the present disclosure.

[0027] Description of Reference Numerals

[0028] 1. Main body; 11. Charging box; 111. Charging room; 112. Cooling room; 1121. Exhaust fan; 1122. Cooling hole; 2. Battery compartment; 21. Compartment; 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 maintaining pump; 35. Water flow detection pipeline; 351. Water flow detection switch; 36. Water distribution valve; 37. Maintenance pipeline; 371. Maintenance valve core; 38. Thermistor line; 381. Solenoid switch valve; 39. Fire water collection tray; 391. Return pipe; 4. Protective plate. DETAILED DESCRIPTION

[0029] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0030] In the present disclosure, unless otherwise stated, "inside" and "outside" refer to the inside and outside of the outline of the corresponding component; "far" and "near" refer to the distance and nearness of the corresponding component in space relative to another component. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another element and do not have order and importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

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

[0032] According to the first aspect of the present disclosure, referring to Figures 1 to 4 The present disclosure provides a fire fighting system for fire fighting in a battery compartment. The battery compartment 2 has a compartment opening 21 for batteries to enter and exit. The fire fighting system 3 includes an internal water fire fighting pipeline 31 and an external water fire fighting pipeline 32, and a water supply module respectively connected to the internal water fire fighting pipeline 31 and the external water fire fighting pipeline 32. The internal water fire fighting pipeline 31 is provided with an internal water outlet nozzle 311, and the external water fire fighting pipeline 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 compartment opening 21.

[0033] Through this technical solution, the fire protection system 3 sprays the inside of the battery compartment 2 and the outside of the hatch 21 through the inner water nozzle 311 and the outer water nozzle 321, respectively, so as to quickly cool down the battery in thermal runaway. Among them, the "direction" used in this disclosure refers to the setting direction in which the fire water can be sprayed from the inner water nozzle 311 and the outer water nozzle 321 to the target area. Spraying the inside of the battery compartment 2 can extinguish or cool down the fire inside the battery, and spraying the outside of the hatch 21 of the battery compartment 2 can extinguish or cool down the fire hazard that occurs at the hatch 21. In some embodiments, because the exposed part of the rechargeable battery during charging is usually an area such as a cover plate with many components, this area is prone to fire hazards first, so a separate outgoing water nozzle 321 pointing to the outside of the hatch 21 has a high degree of pertinence.

[0034] Specifically, when a battery experiences thermal runaway and its temperature rises, the inner water nozzle 311 and the outer water nozzle 321 can spray the inside of the battery compartment 2 and the outside of the compartment opening 21 in a targeted manner according to the specific location where the battery heats up. That is, the inner water nozzle 311 and the outer water nozzle 321 can controllably act individually or jointly on the temperature-rising location of the battery in thermal runaway to spray and cool it down in a targeted manner, so that the battery in thermal runaway can be cooled down quickly and with good fire-fighting effect.

[0035] In some embodiments, Figure 2 and Figure 3 As shown, the water supply module includes a water tank 33 and a pressure-maintaining pump 34, the inlet of the pressure-maintaining pump 34 is connected to the water tank 33, and 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-maintaining pump 34 to obtain pressurized water from the pressure-maintaining pump 34. In this way, when the battery is thermally runaway and its temperature rises, the internal water outlet nozzle 311 and the external water outlet nozzle 321 can spray fire-fighting water accordingly. At this time, due to the presence of the pressure-maintaining pump 34, the fire-fighting water in the water tank 33 continues to supply water to the nozzle under the action of the pressure-maintaining pump 34, thereby ensuring the fire-fighting effect. It can be understood that in some other possible embodiments not shown in the drawings, the water tank 33 can also be an external pipeline, that is, the inlet of the pressure-maintaining pump 34 is connected to the water outlet of the external pipeline, and the water inlet of the external pipeline is connected to the external water source, so that the internal water fire-fighting pipeline 31 and the external water fire-fighting pipeline 32 can also be supplied with fire-fighting water through the external water source, and the present disclosure does not limit this.

[0036] Specifically, the fire-fighting water in the water tank 33 can be controlled to flow through the inner water fire-fighting pipeline 31 alone under the action of the pressure-maintaining pump 34, and sprayed on the inside of the battery compartment 2 through the inner water outlet nozzle 311, or, the fire-fighting water in the water tank 33 can be controlled to flow through the outer water fire-fighting pipeline 32 alone under the action of the pressure-maintaining pump 34, and sprayed on the outside of the compartment opening 21 through the outer water outlet nozzle 321, or, the fire-fighting water in the water tank 33 can flow through the inner water fire-fighting pipeline 31 and the outer water fire-fighting pipeline 32 without interfering with each other under the action of the pressure-maintaining pump 34, and sprayed on the inside of the battery compartment 2 and the outside of the compartment opening 21 through the inner water outlet nozzle 311 and the outer water outlet nozzle 321 respectively, so as to achieve rapid cooling of the battery.

[0037] In some embodiments, Figure 2 and Figure 3 As shown, the inner water fire-fighting pipeline 31 and the outer water fire-fighting pipeline 32 are connected in parallel at the outlet of the pressure-maintaining pump 34 through a water flow detection pipeline 35. A water flow detection switch 351 for detecting water flow changes is provided on the water flow detection pipeline 35. The water flow detection switch 351 is electrically connected to the pressure-maintaining pump 34, that is, the pressure-maintaining pump 34 does not need to work all the time, but is controlled by the water flow detection switch 351. When a sprinkler sprays fire-fighting water to cause water flow in the fire-fighting pipeline, the water flow detection switch 351 can control the pressure-maintaining pump 34 to open through the detected water flow signal, thereby continuously providing pressurized water to the corresponding fire-fighting pipeline. In some possible deformation modes, the pressure-maintaining pump 34 can also be in working state all the time and continuously provide pressure, which is not limited by the present disclosure.

[0038] In some embodiments, in order to facilitate the connection of the internal water fire fighting pipeline 31 and the external water fire fighting pipeline 32, as shown in FIG. Figure 2 and Figure 3 As shown, the fire protection system 3 also includes a water diverter valve 36, which has a water inlet connected to the water flow detection pipeline 35, a first water outlet connected to the internal water fire protection pipeline 31, and a second water outlet connected to the external water fire protection pipeline 32, so that pressurized water can be provided to the internal water fire protection pipeline 31 and the external water fire protection pipeline 32 at the same time. Specifically, when the battery thermally runs away and the temperature rises, the fire protection water flows from the water tank 33 through the water flow detection pipeline 35, flows into the water inlet of the water diverter valve 36, and can be controllably flowed into at least one of the internal water fire protection pipeline 31 through the first water outlet and the external water fire protection pipeline 32 through the second water outlet, and the first water outlet and the second water outlet do not interfere with each other.

[0039] In addition, in some embodiments, the water diversion valve 36 further includes an inspection port connected to the water storage tank 33 through an inspection pipeline 37 , and the water storage tank 33 and the inspection port can be connected and disconnected via an operable inspection valve core 371 .

[0040] In this way, when inspecting the fire protection system 3, the inspection valve core 371 can be operated to connect the inspection port and the water tank 33. The fire protection water passes through the inspection port and flows through the inspection pipeline 37 before flowing into the water tank 33. The fire protection water in the water flow detection pipeline 35 flows. If the water flow detection switch 351 can sense the water flow and transmit the signal to the pressure maintaining pump 34, the pressure maintaining pump 34 is turned on to become a working state, and the fire protection water is supplied from the water tank 33 through the water flow detection pipeline 35, flows into the water inlet of the water diversion valve 36, passes through the inspection port and flows through the inspection pipeline 37 before flowing into the water tank 33. At this time, the fire protection system 3 is normal. If there is no continuous flow of fire protection water, the fire protection system 3 should be inspected and repaired.

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

[0042] In some embodiments, in order to improve the charging efficiency, the battery compartment 2 is usually arranged in multiple layers along the height direction of the main body 1, and each layer has multiple battery compartments 2, and the internal water nozzles 311 and the external water nozzles 321 are respectively multiple and are arranged one by one with the multiple battery compartments 2, so that each battery compartment 2 has a fire-fighting effect; in some embodiments, such as Figure 2 and Figure 4 As shown, when there are two rows of battery compartments 2 in the same layer in the height direction, the outgoing water nozzles 321 can be only arranged outside the compartment openings 21 of the battery compartments 2 in the top row. In this way, when a fire occurs at the compartment openings 21 below, the fire can be extinguished by the fire-fighting water sprayed by the top outgoing water nozzles 321 that flows downward due to gravity, without the need to arrange a corresponding outgoing water nozzle 321 outside each compartment opening 21.

[0043] In an embodiment where there are multiple layers of battery compartments 2 along the height direction, in order to facilitate the arrangement of pipelines, the external water fire-fighting pipeline 32 includes a first main pipe 322 extending along the height direction of the main body 1, and multiple first branch pipes 323 are connected in parallel to the first main pipe 322, each first branch pipe 323 corresponds to a layer of battery compartment 2, and is equipped with an outgoing water nozzle 321 corresponding to the battery compartment 2 on this layer, so as to provide outgoing water for the battery compartment 2 on each layer, and optionally, each first branch pipe 323 extends along the side of the compartment opening 21 of multiple battery compartments 2 on the same layer, so as to facilitate fire fighting for each compartment opening 21.

[0044] The internal water outlet fire fighting pipeline includes a second main pipe 312, and the outlet of the second main pipe 312 is connected in parallel with a plurality of second branch pipes 313, each second branch pipe 313 corresponds to a layer of battery compartment 2, so as to supply water to the interior of each layer of battery compartment 2, wherein in order to avoid conflict with the arrangement of the first branch pipe 323, optionally, the second branch pipe 313 extends into the battery compartment 2 from the rear side of the battery compartment 2 opposite to the side of the compartment opening 21, and the pipe section of the second branch pipe 313 located inside the battery compartment 2 sequentially passes through the plurality of battery compartments 2 on the same layer and is equipped with an internal water outlet nozzle 311 corresponding to each battery compartment 2. The number of internal water outlet nozzles 311 inside each battery compartment 2 can be set to any number, optionally, such as Figure 4 As shown, the inner water outlet nozzles 311 can be symmetrically arranged on both sides of the second branch pipe 313 and open toward the inside of the battery compartment 2, and multiple pairs of inner water outlet nozzles 311 can be provided in the same battery compartment 2. In addition, in an embodiment not shown in the drawings, the inner water outlet nozzle 311 can also be provided as one and directly connected to the second branch pipe 313 and open toward the inside of the battery compartment 2, and the present 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 inner water nozzle 311 and / or the outer water nozzle 321 are constructed as fire sprinklers, wherein, as is known, a sensing element for sensing temperature or smoke is provided inside the fire sprinkler, and is used to open the fire sprinkler when the temperature or smoke exceeds a threshold value. Specifically, as a known technology, the sensing element can be a liquid-filled thermosensitive glass ball, in which kerosene, ethanol and other solutions are stored. When the battery has thermal runaway and the temperature rises, the liquid inside the thermosensitive glass ball begins to expand. When the temperature exceeds the threshold value, the liquid will burst the thermosensitive glass ball. At this time, the fire water in the fire pipeline is sprayed out to quickly cool down the battery in thermal runaway.

[0046] In other embodiments, the internal water nozzle 311 and / or the external water nozzle 321 can also be constructed as a pipe nozzle. In this case, the corresponding internal water fire fighting pipeline 31 or the external water fire fighting pipeline 32 is provided with a thermistor 38 and an electromagnetic switch valve 381. The thermistor 38 is arranged in a serpentine shape inside the battery compartment 2 and / or the compartment 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 on-off of the pipeline provided with the pipe nozzle. Specifically, the thermistor 38 can be composed of a wire and a layer of thermosensitive material. When the battery is thermally runaway and the ambient temperature rises, the thermosensitive material will expand thermally, causing the thermistor 38 to deform or even self-ignite. Then, the signal is transmitted to the electromagnetic switch valve 381 to open the fire fighting pipeline, and the pipe nozzle sprays fire fighting water to quickly cool down the battery in thermal runaway.

[0047] It should be noted that the severity of thermal runaway varies with the energy density of the battery. The greater the energy density of the battery, the more severe the thermal runaway. Therefore, the inner water nozzle 311 and the outer water nozzle 321 can be constructed into different nozzle structures according to the energy density of the battery.

[0048] For example, one embodiment, such as Figure 2 and Figure 4 As shown, the external water nozzle 321 is constructed as a fire nozzle, the internal water nozzle 311 is constructed as a pipe nozzle, and the thermistor 38 can be linearly arranged inside the battery compartment 2 along the extension direction of the second branch pipe 313. Optionally, the thermistor 38 can also be arranged in a serpentine manner inside each battery compartment 2 to be able to detect the temperature inside the battery compartment 2 in a larger 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 in the fire nozzle, the fire nozzle opens and sprays on the outside of the compartment opening 21 to cool the battery. If the battery temperature continues to rise, the thermistor 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 pipeline with the pipe nozzle, and the pipe nozzle sprays on the inside of the battery compartment 2 to cool the battery.

[0049] It is understandable that in order to facilitate placing the battery into the battery compartment 2 or taking the battery out of the battery compartment 2, the handle of the battery should face outward. Generally, a BMS battery management system is installed inside the battery near the handle. 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 is lower than the auto-ignition temperature of the thermistor 38.

[0050] In an embodiment not shown in the accompanying drawings, when the energy density of the battery is relatively small, the external water nozzle 321 and the internal water nozzle 311 can both be constructed as fire nozzles. When the battery thermally runs away and the temperature continues to rise until it exceeds the threshold of the sensing element in the fire nozzle of the external water fire pipeline 32, the fire nozzle opens and sprays on the outside of the compartment 21 to cool the battery. If the battery temperature continues to rise until it exceeds the threshold of the sensing element in the fire nozzle of the internal water fire pipeline 31, the fire nozzle opens and sprays on the inside of the battery compartment 2 to cool the battery.

[0051] It should be noted that the above embodiment only discloses the case where the handle of the battery is facing outward during charging, and a BMS battery management system that is prone to thermal runaway is installed near the handle inside the battery. Accordingly, the external water fire fighting pipeline 32 sprays the battery to cool it down first, and the internal water fire fighting pipeline 31 sprays the battery to cool it down later. In addition, for the case where the part of the battery inside the battery compartment 2 is prone to thermal runaway, accordingly, for example, Figure 2 and Figure 4As shown, the outgoing water nozzle 321 can be constructed as a fire nozzle, and the inner water nozzle 311 can be constructed as a pipe nozzle. The auto-ignition temperature of the thermistor 38 should be lower than the threshold temperature of the fire nozzle, that is, the preset temperature at which the inner water fire pipeline 31 starts to spray and cool the battery is lower than the preset temperature at which the outer water fire pipeline 32 starts to spray and cool the battery. The present disclosure is not limited to this.

[0052] According to the second aspect of the present 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. A battery compartment 2 is constructed in the main body 1, and the battery compartment 2 is used to store batteries and / or charge batteries.

[0053] Specifically, in some embodiments, Figure 1 and Figure 2 As shown, the charging device can be a charging cabinet, and the main body 1 is formed as a cabinet. A plurality of battery compartments 2 for charging the lithium batteries of the drone are arranged inside the cabinet. A protective plate 4 is connected to the top of the cabinet to protect the cabinet from rain and sun, etc. In addition, optionally, a parking area for parking the drone is provided on the protective plate 4 to facilitate the placement of the drone when the lithium battery of the drone is being charged.

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

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

[0056] At the same time, a low water level detector is also provided in the water tank to sound an alarm when the fire water level in the water tank 33 is too low. Then, fire water needs to be added into and outside the water tank 33 to ensure that there is sufficient fire water in the water tank 33 to meet the fire water requirement for cooling the battery when it is thermally out of control.

[0057] In some embodiments, Figure 2 As shown, a plurality of charging boxes 11 are arranged along the height direction in the main body 1, a plurality of battery compartments 2 are arranged in each charging box 11, and two adjacent charging boxes 11 are separated by fire-proof sealing materials.

[0058] When a battery in a battery compartment 2 in a charging box 11 experiences thermal runaway, when the battery is cooled, fire water and open flames that may be generated by thermal runaway of the battery are separated from the adjacent charging box 11 by fire-isolating sealing materials to prevent open flames or fire water from affecting the normal charging of the batteries in the charging box 11 in the adjacent layer. The fire-isolating sealing materials can be constructed into aerogel pads, etc.

[0059] In some embodiments, Figure 2 and Figure 4 As shown, the interior of the charging box 11 includes a charging chamber 111 and a heat dissipation chamber 112. The battery compartment 2 is located in the charging chamber 111. The heat dissipation chamber 112 is located at the rear side of the compartment opposite to the compartment 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 opened.

[0060] During the process of charging the battery, the heat generated diffuses from the charging chamber 111 into the heat dissipation cavity and is discharged by the exhaust fan 1121 and the heat dissipation holes 1122, so as to dissipate the heat inside 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] Since the charging device provided by the present disclosure is equipped with a highly targeted fire-fighting system, when the battery thermally runs away and the temperature rises near the hatch 21, the fire-fighting water flows through the first main pipe 322 and then flows into the corresponding first branch pipe 323, and is sprayed out from the outgoing water nozzle 321 corresponding to the battery compartment 2 where the battery with thermal runaway is located, so as to spray the outside of the hatch 21 of the battery compartment 2, thereby quickly cooling the battery with thermal runaway.

[0062] When the battery thermally runs away and the temperature rises inside the battery compartment 2, the fire water flows through the second main pipe 312 and then flows into the corresponding second branch pipe 313, and is sprayed out from the internal water nozzle 311 corresponding to the battery compartment 2 where the battery with thermal runaway is located, so as to spray the inside of the battery compartment 2, thereby quickly cooling the battery with thermal runaway.

[0063] It can be understood that when the battery thermal runaway phenomenon is more serious, fire water can be sprayed out from the external water nozzle 321 and the internal water nozzle 311 corresponding to the battery compartment 2 where the battery in thermal runaway is located, so as to act on the outside of the compartment opening 21 of the battery compartment 2 and the inside of the battery compartment 2 at the same time to quickly cool down the battery in thermal runaway.

[0064] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present 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, the present disclosure will not further describe various possible combinations.

[0066] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A fire fighting system, characterized in that: Used for fire fighting in a battery compartment, the battery compartment having a compartment opening for batteries to enter and exit, the fire fighting system comprising: an inner water fire fighting pipeline and an outer water fire fighting pipeline, wherein the inner water fire fighting pipeline is provided with an inner water outlet nozzle, and the outer water fire fighting pipeline is provided with an outer water outlet nozzle, wherein the inner water outlet nozzle points to the inside of the battery compartment, and the outer water outlet nozzle points to the outside of the compartment opening; and A water supply module is connected to the inner water fire fighting pipeline and the outer water fire fighting pipeline respectively.

2. The fire fighting system according to claim 1, characterized in that: The water supply module includes a water tank and a pressure-maintaining pump, the inlet of the pressure-maintaining pump is connected to the water 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-maintaining pump to obtain pressurized water from the pressure-maintaining pump.

3. The fire fighting system according to claim 2, characterized in that: The inner water fire fighting pipeline and the outer water fire fighting pipeline are connected in parallel to the outlet of the pressure maintaining pump through a water flow detection pipeline. A water flow detection switch for detecting water flow changes is provided on the water flow detection pipeline. The water flow detection switch is electrically connected to the pressure maintaining pump.

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

5. The fire fighting system according to any one of claims 1 to 4, characterized in that: The inner water nozzle and / or the outer water nozzle is configured as a fire sprinkler, wherein a sensing element for sensing temperature or smoke is provided inside the fire sprinkler, and is used to open the fire sprinkler when the temperature or smoke exceeds a threshold value; or, The inner water nozzle and / or the outer water nozzle are constructed as pipe nozzles. Correspondingly, the inner water fire-fighting pipeline and / or the outer water fire-fighting pipeline are provided with a thermistor and an electromagnetic switch valve. The thermistor is arranged in a serpentine shape inside the battery compartment and / or at the compartment 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 of the pipeline provided with the pipe nozzle.

6. A charging device, characterized in that: include: A main body, wherein a battery compartment is configured inside the main body, and the battery compartment is used to store batteries and / or charge the batteries; as well as A fire fighting system according to any one of claims 1 to 5.

7. The charging device according to claim 6, characterized in that: A fire water collecting tray is arranged in the main body, the battery compartment is installed in the fire water collecting tray, the fire water collecting tray is connected with the water supply module through a return pipe, and a water filtering device is arranged in the return pipe.

8. The charging device according to claim 6 or 7, characterized in that: A plurality of charging boxes are arranged in the height direction inside the main body, a plurality of battery compartments are arranged in each charging box, and two adjacent charging boxes are separated by fire-proof sealing materials.

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

10. The charging device according to claim 8, characterized in that: The external water fire fighting pipeline includes a first main pipe extending in the height direction of the main body, and the first main pipe is provided with a plurality of first branch pipes arranged in parallel, each first branch pipe corresponds to a layer of battery compartments, and is provided with the external water sprinkler heads corresponding to the battery compartments of the layer one by one, and each first branch pipe extends along the compartment opening side of the plurality of battery compartments of the same layer; The internal water fire-fighting pipeline includes a second main pipe, on which are multiple second branch pipes arranged in parallel, each second branch pipe corresponding to a layer of battery compartment, and extending into the battery compartment from the compartment tail side opposite to the compartment opening side of the battery compartment, and the pipe section of the second branch pipe located inside the battery compartment passes through multiple battery compartments on the same layer in sequence and is equipped with the internal water nozzle corresponding to each battery compartment.

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