A fire extinguishing device for battery thermal runaway of battery swap station and battery swap station
By using coolant as a fire extinguishing medium in the battery swapping station and placing the fire water tank door on the side and the battery bracket at the bottom, the problems of water freezing in winter and space occupation are solved, thereby improving the battery storage capacity and service efficiency of the battery swapping station.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG GEELY HLDG GRP CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-14
AI Technical Summary
In the extremely cold winters of northern regions, tap water is prone to freezing, which means that thermal runaway batteries cannot be completely submerged in fire water tanks, affecting fire extinguishing effectiveness. At the same time, the existing fire water tank structure encroaches on battery storage space, reducing the service capacity of battery swapping stations.
Coolant is used as the extinguishing medium. The fire water tank door is located on the side of the tank, the battery bracket is located at the bottom of the tank, the coolant is provided by the chiller unit of the battery swapping station's thermal management system, the sprinkler assembly is installed on the top of the tank, and the control unit monitors and controls the fire extinguishing process.
It effectively avoids the problem of water freezing, increases battery storage space, improves the service capacity of the battery swapping station, and is well-compatible with battery transportation mechanisms, meeting the fire protection needs in winter.
Smart Images
Figure CN224484757U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of fire protection facilities for battery swapping stations, specifically to a fire extinguishing device for battery thermal runaway in battery swapping stations and a battery swapping station. Background Technology
[0002] With the rapid development of the new energy vehicle charging and swapping field, swapping station products are emerging in large numbers on the market, but battery thermal runaway also occurs frequently. Therefore, handling battery thermal runaway within a swapping station has become one of its key functions. Currently, the common solution on the market is to place the thermally runaway battery in a fire water tank and use the tap water in the tank for fire extinguishing and cooling.
[0003] However, in the extremely cold winters of northern regions, tap water easily freezes, preventing the thermal runaway battery from being fully submerged in the fire-fighting water tank, severely impacting firefighting effectiveness. This hidden danger directly threatens the safe operation of the battery swapping station and urgently needs improvement.
[0004] Furthermore, the current structural design of fire-fighting water tanks has shortcomings. Most fire-fighting water tanks on the market have battery supports located at the top of the tank, with water stored at the bottom. During use, the thermal runaway battery must first be placed on the battery support, and then lowered together with the support to the bottom of the tank to be submerged before extinguishing the fire. This design encroaches on the space of the normal battery storage compartment, reducing the total number of batteries that a battery swapping station can store and thus lowering the station's service capacity. Utility Model Content
[0005] In view of this, the purpose of this application is to provide a fire extinguishing device for battery thermal runaway in a battery swapping station and a battery swapping station, so as to solve at least one of the above-mentioned technical problems.
[0006] In a first aspect, this application provides a fire extinguishing device for battery thermal runaway in a battery swapping station, comprising: a fire water tank, including a tank body, a door, a door opening and closing device, a battery bracket, and a spray assembly; the side wall of the tank body has an opening for battery entry and exit; the door is installed on the opening and is opened and closed by the door opening and closing device; the battery bracket is installed at the bottom of the tank body to provide support for the battery; the spray assembly is installed at the top of the tank body to spray coolant; and a chiller unit for providing coolant, the chiller unit having a liquid inlet. The system includes a fire water tank inlet and outlet; a fire water tank inlet pipe assembly, comprising a fire water tank inlet pipe and an inlet solenoid valve, wherein the fire water tank inlet pipe is connected between the sprinkler assembly and the outlet of the chiller unit, and the inlet solenoid valve is installed on the fire water tank inlet pipe to control the on / off state of the fire water tank inlet pipe; and a fire water tank return pipe assembly, comprising a fire water tank return pipe and a drain pump, wherein the fire water tank return pipe is connected between the bottom of the tank and the inlet of the chiller unit, and the drain pump is installed on the fire water tank return pipe to transport the coolant in the tank back to the chiller unit.
[0007] In conjunction with the first aspect, some alternative embodiments further include: a control unit for controlling the operation of the door opening and closing device, the inlet solenoid valve, and the drain pump.
[0008] In conjunction with the first aspect, in some optional embodiments, it further includes at least one of a door sensor, a battery position sensor, a liquid level sensor, and a smoke and temperature detector. The door sensor is used to monitor the opening and closing of the door, the battery position sensor is used to monitor whether the battery has reached a set position inside the enclosure, the liquid level sensor is used to monitor the liquid level of the coolant inside the enclosure, and the smoke and temperature detector is used to monitor at least one of the following concentrations inside the enclosure: smoke concentration, ambient temperature, carbon monoxide concentration, hydrogen fluoride concentration, volatile organic compound concentration, carbon dioxide concentration, sulfur dioxide concentration, and nitrogen oxide concentration.
[0009] In conjunction with the first aspect, in some optional embodiments, the door opening and closing device includes a cylinder, a linkage mechanism, and a cylinder sensor. A cylinder is provided on each side of the opening on the box body. The cylinder body of each cylinder is mounted on the box body. The piston of the cylinder is connected to the door through the linkage mechanism and can drive the door to flip in the vertical plane through telescopic movement to realize the opening and closing of the opening. The cylinder sensor is used to detect the position of the piston of the cylinder.
[0010] In conjunction with the first aspect, in some alternative embodiments, the battery support includes a roller support and a plurality of rollers, the roller support being mounted on the bottom surface of the housing, and the plurality of rollers being mounted on the roller support parallel to the housing door.
[0011] In conjunction with the first aspect, in some optional embodiments, the fire water tank return pipe assembly further includes a first one-way valve and a Y-type filter. Both the first one-way valve and the Y-type filter are installed on the fire water tank return pipe. The first one-way valve is used to prevent the coolant in the fire water tank return pipe from flowing back into the tank body, and the Y-type filter is used to prevent impurities in the coolant in the fire water tank return pipe from entering the chiller unit.
[0012] In conjunction with the first aspect, some optional embodiments further include: a battery compartment liquid inlet pipe, one end of which is connected to the fire water tank liquid inlet pipe, and the other end of which is connected to the liquid inlet of each battery compartment in the battery swapping station; and a battery compartment liquid return pipe, one end of which is connected to the fire water tank liquid return pipe, and the other end of which is connected to the liquid outlet of each battery compartment in the battery swapping station.
[0013] In conjunction with the first aspect, in some alternative embodiments, a second check valve is provided on the battery compartment return pipe. The second check valve is used to prevent coolant in the battery compartment from flowing into each battery compartment during the process of returning to the chiller unit through the fire water tank return pipe.
[0014] In conjunction with the first aspect, in some alternative embodiments, an observation window is provided on the side wall of the enclosure.
[0015] Secondly, this application provides a battery swapping station, including a fire extinguishing device for thermal runaway of batteries in any of the embodiments of the first aspect described above.
[0016] Based on the above technical solutions, the fire extinguishing device and battery swapping station for battery thermal runaway provided in this application use coolant as the extinguishing medium, which effectively avoids the freezing situation that occurs in winter due to the use of water as the extinguishing medium in the prior art; the door of the fire water tank is set on the side of the tank body and the battery bracket is set at the bottom of the tank body, which not only significantly reduces the height of the fire water tank, thereby increasing the battery storage space in the battery swapping station, but also can be well adapted to the transfer mechanism used for battery transportation in the battery swapping station, greatly improving the service capacity of the battery swapping station. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a structural schematic diagram of a fire extinguishing device for battery thermal runaway in a battery swapping station, provided as an embodiment of this application.
[0019] Figure 2 This is a structural schematic diagram from another angle of a fire extinguishing device for thermal runaway of batteries in a battery swapping station, provided as an embodiment of this application.
[0020] Figure 3 This is a structural diagram of a fire water tank with a concealed sprinkler assembly, provided as an embodiment of this application.
[0021] Figure 4 This is a structural schematic diagram from another angle of a fire water tank with a hidden sprinkler assembly, provided as an embodiment of this application.
[0022] Figure 5 This is a schematic diagram of a chiller unit and its various pipelines provided in an embodiment of this application.
[0023] Figure 6 This is a schematic diagram illustrating the working process of a fire extinguishing device for battery thermal runaway in a battery swapping station, provided as an embodiment of this application.
[0024] Reference numerals: 100, Fire extinguishing device; 10, Fire water tank; 11, Tank body; 12, Tank door; 121, Flame-retardant sealing strip; 13, Tank door opening and closing device; 131, Cylinder; 132, Linkage mechanism; 14, Battery bracket; 141, Idler roller bracket; 142, Idler roller; 15, Sprinkler assembly; 151, Sprinkler pipe; 152, Sprinkler head; 16, Battery position sensor; 17, Level gauge; 18, Smoke and temperature detector; 19, Observation window; 2 0. Chiller unit; 30. Fire water tank inlet pipe assembly; 31. Fire water tank inlet pipe; 32. First hand valve; 33. Inlet solenoid valve; 40. Fire water tank return pipe assembly; 41. Fire water tank return pipe; 42. Drain pump; 43. First check valve; 44. Y-type filter; 45. Second hand valve; 50. Battery compartment inlet pipe; 51. Battery compartment main inlet pipe; 60. Battery compartment return pipe; 61. Battery compartment main return pipe; 62. Second check valve. Detailed Implementation
[0025] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of them. Based on the description of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.
[0026] In the description of this application, unless otherwise expressly specified and limited, the terms "connection," "setup," "installation," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0027] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “center,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0028] The terms “first,” “second,” “third,” etc., are used only to distinguish elements with similar properties, and do not indicate or imply relative importance or a specific order, unless otherwise explicitly stated or limited.
[0029] The terms “comprising,” “including,” “having,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0030] The term "multiple" means two or more (including two).
[0031] The term "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone.
[0032] The terms "an embodiment," "as an example," and "in one implementation" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which may be included in at least one embodiment or example of this application. These illustrative expressions do not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Where there is no conflict, the embodiments and features described in these embodiments can be combined in a suitable manner.
[0033] Figure 1 and Figure 2 Schematic diagrams of the fire extinguishing device 100 for battery thermal runaway in a battery swapping station provided in this application embodiment from different angles, as shown below. Figure 1 and Figure 2 As shown in the figure, this application provides a fire extinguishing device 100 for battery thermal runaway in a battery swapping station, including a fire water tank 10, a chiller unit 20, a fire water tank inlet pipe assembly 30, a fire water tank return pipe assembly 40, a battery compartment inlet pipe 50, and a battery compartment return pipe 60. The details of each part are described below.
[0034] like Figure 3 and Figure 4 As shown, the fire water tank 10 includes a tank body 11, a tank door 12, a tank door opening and closing device 13, a battery bracket 14, and a sprinkler assembly 15 (see...). Figure 1 and Figure 2 ), door sensor (not shown in the figure), battery position sensor 16, liquid level gauge 17, and flue gas detector 18.
[0035] An opening for battery entry and exit is provided on one side wall of the enclosure 11. A door 12 is installed on the opening and is opened and closed by a door opening and closing device 13. By placing the opening on the side wall, the height of the enclosure 11 can be reduced. For a single-compartment battery swapping station, this allows for one more battery storage compartment; for a dual-compartment station, it allows for two more battery storage compartments, thereby enhancing the charging and swapping service capabilities of the station. It should be noted that the top surface of the enclosure 11 is hidden in the diagram.
[0036] As an example, the side wall where the opening is located is inclined. When the door 12 is closed, the more coolant in the box 11, the greater the pressure on the door 12, and the better the sealing performance of the door 12. A flame-retardant sealing strip 121 is also provided at the edge of the door 12. The flame-retardant sealing strip 121 is used to seal the gap between the door 12 and the opening when the door 12 is closed, serving the functions of sealing, flame retardancy, fire prevention, and safety protection. The box 11 is driven by the door opening and closing device 13 to rotate in the vertical plane to achieve the opening and closing of the opening. The door opening and closing device 13 includes a cylinder 131, a linkage mechanism 132, and a cylinder sensor (not shown in the figure). A cylinder 131 is provided on each side of the opening on the housing 11. The cylinder body of each cylinder 131 is mounted on the housing 11. The piston of the cylinder 131 is connected to the door 12 through the linkage mechanism 132. The cylinder sensor is used to detect the position of the piston of the cylinder 131. When the cylinder 131 is working, the piston drives the door 12 to rotate in the vertical plane through the linkage mechanism 132, thereby realizing the opening and closing function of the door 12.
[0037] The battery bracket 14 is installed at the bottom inside the housing 11 to provide support for the battery.
[0038] As an example, the battery holder 14 includes a roller bracket 141 and a plurality of rollers 142. The two roller brackets 141 are mounted parallel to each other on the bottom surface inside the housing 11. The plurality of rollers 142 are parallel to the door 12 and each roller 142 is rotatably mounted on the two roller brackets 141 at both ends. The rollers 142 rotate as the batteries go in and out, which can reduce frictional resistance and facilitate the transportation of batteries.
[0039] like Figure 1 and Figure 2 As shown, the spray assembly 15 is installed on the top inside the housing 11 for spraying coolant.
[0040] As an example, the sprinkler assembly 15 includes a sprinkler pipe 151 and multiple nozzles 152. The sprinkler pipe 151 is mounted on the top surface inside the housing 11. The sprinkler pipe 151 is annular, allowing it to cover a larger area. The liquid inlet of the sprinkler pipe 151 extends to the outside of the housing 11 and is connected to the fire water tank inlet pipe assembly 30. The multiple nozzles 152 are distributed and mounted on the sprinkler pipe 151 for spraying coolant.
[0041] The door sensor is used to monitor the opening and closing of the door 12. As an example, the door sensor is a wireless tilt sensor installed on the door 12. It monitors the opening and closing of the door 12 by monitoring the angle of the door 12, and is suitable for high-temperature scenarios.
[0042] The battery position sensor 16, the liquid level gauge 17, and the smoke and temperature detector 18 are all installed inside the housing 11. The battery position sensor 16 monitors whether the battery has reached a set position within the housing 11. As an example, the battery position sensor 16 is an adjustable-distance photoelectric sensor. The liquid level gauge 17 monitors the liquid level of the coolant inside the housing 11. As an example, the liquid level gauge 17 is an electronic liquid level gauge, configurable to send a signal of the liquid level in real time and / or send a signal when the measured liquid level reaches a preset threshold. The smoke and temperature detector 18 monitors the smoke concentration, ambient temperature, carbon monoxide (CO) concentration, hydrogen fluoride (HF) concentration, volatile organic compound (VOCs) concentration, carbon dioxide (CO2) concentration, sulfur dioxide (SO2) concentration, and nitrogen oxide (NOx) concentration within the housing 11. x At least one of the following concentrations.
[0043] The side wall of the enclosure 11 is also provided with an observation window 19. As an example, the observation window 19 is made of high-temperature resistant glass and is set on the other side wall of the enclosure 11 opposite to the opening, so as to facilitate observation of the situation inside the enclosure 11 from the outside.
[0044] like Figure 1 and Figure 2 As shown, the chiller unit 20 is used to provide and cool the coolant. As an example, the chiller unit 20 utilizes the existing chiller unit in the battery swapping station's thermal management system, and is positioned higher than the fire water tank 10. The coolant is directly sourced from the battery coolant already present in the battery swapping station's thermal management system as the extinguishing medium. This avoids the need for a site water source for the battery swapping station and also meets the needs of the fire water tank 10 for extinguishing thermal runaway batteries in winter, effectively avoiding the freezing situation that occurs in winter due to the use of water as the extinguishing medium in existing technologies.
[0045] like Figure 1 , Figure 2 as well as Figure 5 As shown, the fire water tank inlet pipe assembly 30 includes a fire water tank inlet pipe 31, a first manual valve 32, and an inlet solenoid valve 33. The fire water tank inlet pipe 31 is connected between the inlet of the sprinkler pipe 151 and the outlet of the chiller unit 20. The first manual valve 32 and the inlet solenoid valve 33 are sequentially installed on the fire water tank inlet pipe 31 along the coolant delivery direction. The first manual valve 32 is used to manually control the on / off state of the fire water tank inlet pipe 31, and the inlet solenoid valve 33 is used to electrically control the on / off state of the fire water tank inlet pipe 31.
[0046] The fire water tank return pipe assembly 40 includes a fire water tank return pipe 41, a drain pump 42, a first check valve 43, a Y-type filter 44, and a second hand valve 45. The fire water tank return pipe 41 is connected between the outlet of the tank body 11 and the inlet of the chiller unit 20. Drain pump 42 A first check valve 43, a Y-type filter 44, and a second hand valve 45 are sequentially installed on the fire water tank return pipe 41 along the coolant delivery direction. The drain pump 42 is used to transport the coolant in the tank 11 back to the chiller unit 20. The first check valve 43 is used to prevent the coolant in the fire water tank return pipe 41 from flowing back to the tank 11. The Y-type filter 44 is used to filter impurities in the coolant in the fire water tank return pipe 41 to prevent impurities from entering the chiller unit 20. The second hand valve 45 is used to manually control the opening and closing of the fire water tank return pipe 41.
[0047] The battery compartment inlet pipe 50 is the battery compartment inlet pipe of the battery swapping station's thermal management system, including a main battery compartment inlet pipe 51 and multiple battery compartment inlet branch pipes (not shown in the figure). One end of the main battery compartment inlet pipe 51 is connected to the fire water tank inlet pipe 31 and is located between the inlet solenoid valve 33 and the first hand valve 32. The other end of the battery compartment inlet pipe 50 is connected to multiple battery compartment inlet branch pipes, which are respectively connected to the inlets of multiple battery compartments in the battery swapping station. Since each battery compartment has a solenoid valve connected to the corresponding battery compartment inlet branch pipe, it is not necessary to install a solenoid valve on the main battery compartment inlet pipe 51.
[0048] The battery compartment return pipe 60 is the battery compartment return pipe of the battery swapping station's thermal management system, including a main battery compartment return pipe 61 and multiple battery compartment return branch pipes (not shown in the figure). One end of the main battery compartment return pipe 61 is connected to the fire water tank return pipe 41 and is located between the Y-type filter 44 and the second hand valve 45. The other end of the main battery compartment return pipe 61 is connected to multiple battery compartment return branch pipes, which are respectively connected to the outlets of multiple battery compartments in the battery swapping station. The main battery compartment return pipe 61 is also equipped with a second check valve 62, which is used to prevent the coolant in the tank 11 from flowing into the battery compartment during the process of returning to the chiller unit 20 through the fire water tank return pipe 41.
[0049] This fire extinguishing device 100 also includes a control unit, which controls the operation of the cylinder 131, the liquid inlet solenoid valve 33, and the liquid discharge pump 42 based on signals from the cylinder sensor, the door sensor, the battery position sensor 16, the liquid level gauge 17, and the smoke and temperature detector 18. As an example, the control unit is a PLC control unit of a battery swapping station.
[0050] Regarding the working process of the fire extinguishing device 100, as an example, the working process of the fire extinguishing device 100 is as follows: When the power exchange station is working normally, the door 12 of the fire water tank 10 is in the open state. For example... Figure 6 As shown, when the battery experiences thermal runaway, it is transported to the housing 11 of the fire water tank 10 via the transfer mechanism of the battery swapping station. When the battery position sensor 16 detects that the battery has reached the set position, it sends a feedback signal to the PLC control unit, and the forks of the transfer mechanism retract. If the battery is not detected to have reached the set position, the PLC control unit prompts that the battery is not in position. After confirming that the battery is in position, the PLC control unit controls the cylinder 131 to extend. The cylinder 131 drives the door 12 to flip through the linkage mechanism 132. When the door 12 flips to the closed position, the piston of the cylinder 131 remains extended and presses the door 12 tightly through the linkage mechanism 132. When the cylinder sensor detects that the cylinder 131 has extended to the correct position and the door sensor detects that the door 12 is closed, it indicates that the door 12 is closed and tightly shut. If the cylinder sensor does not detect that the cylinder 131 has extended to the correct position or the door sensor does not detect that the door 12 is closed, the PLC control unit prompts that the door 12 is not tightly shut. After confirming that the cabinet door 12 is closed, the smoke and temperature detector 18 continuously monitors the situation inside the cabinet 11. When the smoke concentration, ambient temperature, or concentration of related harmful gases inside the cabinet 11 exceeds the set value, a feedback signal is sent to the PLC control unit. The PLC control unit controls the liquid inlet solenoid valve 33 to open, and the chiller unit 20 delivers coolant through the fire water tank inlet pipe 31 to the sprinkler pipe 151, which sprays the battery through the sprinkler head 152 to extinguish the fire. As the coolant is continuously sprayed, the coolant level inside the cabinet 11 exceeds the upper surface of the battery, and the battery is completely immersed in the coolant. When the liquid level reaches the high level set by the level gauge 17 (for example, the liquid level is 10mm higher than the upper surface of the battery), the level gauge 17 triggers a high liquid level signal and sends it back to the PLC control unit. The PLC control unit then controls the liquid inlet solenoid valve 33 to close. After observing the battery through the observation window 19 for a period of time and confirming that the battery thermal runaway is under control, the PLC control unit controls the start of the drain pump 42, which delivers the coolant in the housing 11 to the chiller unit 20. As the coolant in the housing 11 decreases, when the liquid level drops to the low level set by the level gauge 17 (e.g., the liquid level is 2mm below the opening of the housing 11), the level gauge 17 triggers a low liquid level signal and sends it back to the PLC control unit. The PLC control unit then controls the drain pump 42 to stop working and simultaneously controls the cylinder 131 to retract. When the cylinder sensor detects that the cylinder 131 has retracted, it sends a feedback signal to the PLC control unit; otherwise, the PLC control unit indicates that the door 12 has failed to open. Finally, the battery is observed again through the observation window 19 for any abnormalities. After visually confirming that the condition is normal, the battery is removed by the transfer mechanism for further inspection.
[0051] Before the chiller unit 20 starts working, an electric pump is used to add coolant through the coolant inlet of the chiller unit 20 until the coolant level is above the medium-high level or below the high level. Then the chiller unit 20 is powered on and starts working.
[0052] This application embodiment also provides a battery swapping station, which includes the above-described fire extinguishing device 100 for battery thermal runaway.
[0053] In summary, the fire extinguishing device and battery swapping station for battery thermal runaway provided in this application embodiment use coolant as the extinguishing medium, effectively avoiding the freezing situation that occurs in winter when water is used as the extinguishing medium in the prior art. By placing the fire water tank door on the side of the tank body and the battery bracket at the bottom of the tank body, the height of the fire water tank is significantly reduced, thereby increasing the battery storage space within the battery swapping station. Furthermore, it is well-suited for use with the transfer mechanism for battery transportation within the battery swapping station, greatly improving the service capacity of the station. The chiller unit can directly utilize the chiller unit of the battery swapping station's thermal management system, and the coolant can directly utilize the battery coolant from the thermal management system. This not only solves the site water source and equipment requirements for battery swapping station site selection but also effectively meets the winter fire water tank requirements for extinguishing thermal runaway batteries. This fire extinguishing device is suitable for retrofitting existing battery swapping station fire protection facilities and has good economic benefits.
[0054] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application.
Claims
1. A fire extinguishing device for thermal runaway of batteries in battery swapping stations, characterized in that, include: A fire water tank includes a tank body, a tank door, a tank door opening and closing device, a battery bracket, and a sprinkler assembly. The side wall of the tank body is provided with an opening for the battery to enter and exit. The tank door is installed on the opening and is opened and closed by the tank door opening and closing device. The battery bracket is installed at the bottom of the tank body to provide support for the battery. The sprinkler assembly is installed at the top of the tank body to spray coolant. A chiller unit for supplying coolant, the chiller unit having an inlet and an outlet; A fire water tank inlet pipe assembly includes a fire water tank inlet pipe and an inlet solenoid valve. The fire water tank inlet pipe is connected between the outlet of the sprinkler assembly and the chiller unit. The inlet solenoid valve is installed on the fire water tank inlet pipe and is used to control the on / off state of the fire water tank inlet pipe. The fire water tank return pipe assembly includes a fire water tank return pipe and a drain pump. The fire water tank return pipe is connected between the bottom of the tank and the inlet of the chiller unit. The drain pump is installed on the fire water tank return pipe and is used to transport the coolant in the tank back to the chiller unit.
2. The fire extinguishing device according to claim 1, characterized in that, Also includes: The control unit is used to control the operation of the door opening and closing device, the liquid inlet solenoid valve, and the liquid outlet pump.
3. The fire extinguishing device according to claim 1, characterized in that, It also includes at least one of a door sensor, a battery position sensor, a liquid level sensor, and a smoke and temperature detector. The door sensor is used to monitor the opening and closing of the door. The battery position sensor is used to monitor whether the battery has reached a set position inside the enclosure. The liquid level sensor is used to monitor the liquid level of the coolant inside the enclosure. The smoke and temperature detector is used to monitor at least one of the following concentrations inside the enclosure: smoke concentration, ambient temperature, carbon monoxide concentration, hydrogen fluoride concentration, volatile organic compound concentration, carbon dioxide concentration, sulfur dioxide concentration, and nitrogen oxide concentration.
4. The fire extinguishing device according to claim 1, characterized in that, The door opening and closing device includes a cylinder, a linkage mechanism, and a cylinder sensor. Each of the cylinders is located on both sides of the opening on the box body. The cylinder body of each cylinder is mounted on the box body. The piston of the cylinder is connected to the door through the linkage mechanism and can drive the door to flip in the vertical plane through telescopic movement to realize the opening and closing of the opening. The cylinder sensor is used to detect the position of the piston of the cylinder.
5. The fire extinguishing device according to claim 1, characterized in that, The battery bracket includes a roller bracket and multiple rollers. The roller bracket is installed on the bottom surface of the housing, and the multiple rollers are installed on the roller bracket parallel to the housing door.
6. The fire extinguishing device according to claim 1, characterized in that, The fire water tank return pipe assembly also includes a first one-way valve and a Y-type filter. Both the first one-way valve and the Y-type filter are installed on the fire water tank return pipe. The first one-way valve is used to prevent the coolant in the fire water tank return pipe from flowing back to the tank body, and the Y-type filter is used to prevent impurities in the coolant in the fire water tank return pipe from entering the chiller unit.
7. The fire extinguishing device according to claim 1, characterized in that, Also includes: A battery compartment liquid inlet pipe, one end of which is connected to the fire water tank liquid inlet pipe, and the other end of which is connected to the liquid inlet of each battery compartment of the battery swapping station. The battery compartment return pipe has one end connected to the fire water tank return pipe and the other end connected to the outlet of each battery compartment in the battery swapping station.
8. The fire extinguishing device according to claim 7, characterized in that, The battery compartment return pipe is equipped with a second one-way valve, which is used to prevent the coolant in the box from flowing into each battery compartment during the process of returning to the chiller unit through the fire water tank return pipe.
9. The fire extinguishing device according to claim 1, characterized in that, The side wall of the enclosure is provided with an observation window.
10. A battery swapping station, characterized in that, Includes the fire extinguishing device for battery thermal runaway in a battery swapping station as described in any one of claims 1-9.