Liquid cooling energy storage cabinet

Abstract

The utility model relates to the technical field of energy storage systems, and particularly discloses a liquid cooling energy storage cabinet which comprises a cabinet body, a partition plate, a cabinet door, a first fire extinguishing device and a second fire extinguishing device. The partition plate is arranged in the cabinet body and divides the interior of the cabinet body into an equipment compartment for placing electrical equipment and a battery compartment for placing a battery pack, and the fire joint and the pressure release valve are arranged corresponding to the battery compartment; the cabinet door is connected with the cabinet body; the first fire extinguishing device is arranged on the end face, facing the battery compartment, of the cabinet door, and the first fire extinguishing device is configured to be capable of releasing a fire extinguishing medium when the battery pack is in thermal runaway; and the second fire extinguishing device is arranged in the equipment compartment, the output end of the second fire extinguishing device is connected with a fire fighting pipeline, one end of the fire fighting pipeline extends to the battery compartment, and the second fire extinguishing device is configured to be capable of conveying a fire extinguishing medium to the battery pack when the battery pack is in thermal runaway. The safety of the energy storage cabinet can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage system technology, and in particular to a liquid-cooled energy storage cabinet. Background Technology

[0002] Energy storage cabinets are a type of battery energy storage system, classified into air-cooled and liquid-cooled types based on their heat dissipation methods. Air cooling has lower efficiency and is less effective than liquid cooling, making it impossible to increase energy density within the same floor space. Existing liquid-cooled energy storage cabinets generally use a dual-door structure with separate compartments on one side and equipment compartment on the other, resulting in a large footprint. While existing single-door energy storage cabinets have a smaller footprint than dual-door cabinets, they have lower integration and redundant components, potentially reducing safety. Utility Model Content

[0003] The technical problem this invention aims to solve is: how to improve the safety of energy storage cabinets.

[0004] To solve the above-mentioned technical problems, this utility model provides a liquid-cooled energy storage cabinet, comprising:

[0005] The cabinet is equipped with a fire hydrant connection and a pressure relief valve;

[0006] A partition is provided on the cabinet and divides the interior of the cabinet into an equipment compartment for placing electrical equipment and a battery compartment for placing battery packs. The fire hydrant and pressure relief valve are arranged corresponding to the battery compartment.

[0007] Cabinet door, the cabinet door being connected to the cabinet body;

[0008] A first fire extinguishing device is located on the end face of the cabinet door facing the battery compartment, and the first fire extinguishing device is configured to release a fire extinguishing medium in the event of thermal runaway of the battery pack; and...

[0009] A second fire extinguishing device is located in the equipment compartment. The output end of the second fire extinguishing device is connected to a fire-fighting pipeline. One end of the fire-fighting pipeline extends to the battery compartment and is connected to the battery pack. The second fire extinguishing device is configured to deliver a fire extinguishing medium to the battery pack in the event of thermal runaway of the battery pack.

[0010] More preferably, it also includes a dehumidifier, which is located on the side of the cabinet door facing the battery compartment.

[0011] More preferably, the liquid-cooled energy storage cabinet has a first direction, a second direction and a third direction that intersect each other, the cabinet door is provided with an air inlet window corresponding to the equipment compartment, the cabinet body is provided with an air outlet window, and the air outlet window and the air inlet window are arranged opposite to each other in the second direction.

[0012] More preferably, the inner wall of the cabinet is provided with a first slide rail extending along the second direction. The first slide rail is located in the battery compartment, and the battery pack is slidably mounted on the first slide rail. The first slide rail is provided with a first limiting member and a second limiting member at opposite ends in the second direction. The first limiting member and the second limiting member are configured to limit the battery pack in the second direction.

[0013] More preferably, the equipment compartment includes, from top to bottom, a first air duct, a second air duct, and a third air duct in the third direction;

[0014] Also includes:

[0015] An energy storage converter is provided in the first air duct, and the battery pack is electrically connected to the energy storage converter.

[0016] A distribution box, wherein both the distribution box and the second fire extinguishing device are located in the second air duct, and the energy storage converter is electrically connected to the distribution box; and...

[0017] A liquid cooler is located in the third air duct and is connected to the liquid cooling plate of the battery pack.

[0018] More preferably, it also includes:

[0019] The first fan is located on the side of the energy storage converter near the air outlet window;

[0020] A second fan is located on the side of the distribution box away from the air inlet window;

[0021] A third fan, wherein the third fan is disposed on the side of the second air duct near the air outlet window; and,

[0022] A fourth fan is located on the side of the liquid cooler near the air outlet window.

[0023] More preferably, the inner wall of the cabinet is provided with a second slide rail extending along the second direction, and the second slide rail is located in the first air duct;

[0024] Also includes:

[0025] A crossbeam, located on the side of the first air duct near the air inlet window, extending along the first direction and connected to the partition; and,

[0026] A bracket that extends along the third direction and connects the second slide rail and the crossbeam.

[0027] More preferably, the partition has a flange extending into the battery compartment, and the partition has a drain outlet;

[0028] Also includes:

[0029] A water receiving tray, wherein the water receiving tray is disposed in the equipment compartment; and...

[0030] A drain pipe, which connects the drain outlet and the water receiving tray.

[0031] More preferably, the partition is inclined, and along the third direction, the height of the end of the partition near the air inlet window is higher than the height of the end of the partition near the air outlet window, and the drain outlet is located at the end of the partition near the air outlet window.

[0032] More preferably, the inclination angle of the partition is θ;

[0033] The tilt angle θ satisfies the following condition: 1°≤θ≤10°.

[0034] This utility model provides a liquid-cooled energy storage cabinet, which has the following advantages compared with the prior art:

[0035] This utility model discloses a liquid-cooled energy storage cabinet, a single-door energy storage cabinet consisting of a cabinet body and a cabinet door. This design reduces the floor space required. A partition inside the cabinet divides the internal space into an equipment compartment for electrical equipment and a battery compartment for battery packs, effectively enabling separate arrangement of electrical equipment and battery packs and avoiding component redundancy. By connecting a fire extinguishing valve to the battery compartment within the cabinet body, full immersion fire suppression is possible in the event of thermal runaway, improving the safety performance of the liquid-cooled energy storage cabinet. A pressure relief valve allows for the regulation of the internal pressure of the liquid-cooled energy storage cabinet, preventing... The liquid-cooled energy storage cabinet is prone to safety accidents due to excessively high or low internal pressure. A first fire extinguishing device installed at the cabinet door can release extinguishing media for rapid fire suppression in the event of thermal runaway of the battery pack. A second fire extinguishing device further delivers extinguishing media to the thermally runaway battery pack, effectively reducing the internal fire temperature and achieving rapid fire suppression, thus preventing damage to the battery pack or electrical equipment inside the liquid-cooled energy storage cabinet. The combination of a fire hose reel, pressure relief valve, first fire extinguishing device, and second fire extinguishing device achieves a four-level protection effect, significantly improving the safety of the liquid-cooled energy storage cabinet. Attached Figure Description

[0036] Figure 1 This is a front view of the liquid-cooled energy storage cabinet described in this utility model (cabinet door open).

[0037] Figure 2 This is a rear view of the liquid-cooled energy storage cabinet described in this utility model.

[0038] Figure 3 This is an internal schematic diagram of the liquid-cooled energy storage cabinet described in this utility model.

[0039] Figure 4 This is an internal schematic diagram of the liquid-cooled energy storage cabinet described in this utility model from another perspective.

[0040] Figure 5 This is another internal schematic diagram of the liquid-cooled energy storage cabinet described in this utility model.

[0041] Figure 6 This is a utility model Figure 5 Side view.

[0042] Figure 7 This is a rear view (without maintenance door) of the liquid-cooled energy storage cabinet described in this utility model.

[0043] Figure 8 This is an assembly diagram of the battery pack described in this utility model.

[0044] Figure 9 This is an assembly diagram of the energy storage converter described in this utility model.

[0045] Figure 10 This is a pipeline flow diagram of the liquid cooler described in this utility model.

[0046] Figure label:

[0047] 1. Cabinet; 2. Partition; 3. Equipment compartment; 301. First air duct; 302. Second air duct; 303. Third air duct; 304. Air intake area; 4. Battery compartment; 5. Energy storage converter; 6. Distribution box; 7. Liquid chiller; 8. Battery pack; 9. Fire protection piping; 10. Cabinet door; 11. Air intake window; 12. Emergency stop switch; 13. Display screen; 14. Dehumidifier; 15. First fire extinguishing device; 16. Fault indicator; 17. Maintenance Door; 17a, Air outlet window; 18, Fire hose connection; 19, Pressure relief valve; 20, Drain pipe; 21, Water tray; 22, Second fire extinguishing device; 23, Drain outlet; 24, First fan; 25, Second fan; 26, Third fan; 27, Fourth fan; 28, First slide rail; 29, First limiting component; 30, Second limiting component; 31, Second slide rail; 32, Crossbeam; 33, Support; 34, Liquid outlet pipe; 35, Return pipe. Detailed Implementation

[0048] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0049] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they 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 utility model based on the specific circumstances.

[0052] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0054] like Figures 1 to 10 As shown, this embodiment provides a liquid-cooled energy storage cabinet with intersecting first direction X, second direction Y and third direction Z.

[0055] In some implementations, the first direction X, the second direction Y, and the third direction Z intersect each other perpendicularly.

[0056] In some embodiments, the liquid-cooled energy storage cabinet includes a cabinet body 1 and a cabinet door 10, with the cabinet door 10 rotatably connected to the cabinet body 1. The cabinet body 1 and the cabinet door 10 form a single-door energy storage cabinet, which can reduce the floor space occupied.

[0057] In some embodiments, the cabinet 1 is provided with a partition 2, which divides the interior of the cabinet 1 into an equipment compartment 3 for placing electrical equipment and a battery compartment 4 for placing battery packs 8. By setting the partition 2, the electrical equipment and battery packs can be effectively arranged in separate areas, which can avoid redundancy of components and facilitate subsequent maintenance and management.

[0058] It should be noted that the above "electrical equipment" does not include battery packs.

[0059] In some embodiments, the cabinet 1 is provided with a fire hydrant 18, which is arranged corresponding to the battery compartment 4. The fire hydrant 18 is connected to the fire source. By setting the fire hydrant 18 in the cabinet 1 and connecting it to the battery compartment 4, full immersion fire suppression can be carried out in the event of thermal runaway of the liquid-cooled energy storage cabinet, thereby improving the safety performance of the liquid-cooled energy storage cabinet.

[0060] It should be noted that, in the above embodiments, in order to avoid damage to the battery pack 8 or other electrical equipment during full immersion fire suppression, perfluoropolyether fluid (PFPE) or fluorocarbon-based liquid is usually used as the immersion extinguishing medium.

[0061] In some embodiments, to prevent safety accidents caused by excessively high or low internal pressure in the liquid-cooled energy storage cabinet, a pressure relief valve 19 is provided in the cabinet 1. The pressure relief valve 19 is arranged in relation to the battery compartment 4. By setting the pressure relief valve 19, the internal pressure of the liquid-cooled energy storage cabinet can be adjusted to avoid safety accidents. In other embodiments, a barometer can also be arranged in the battery compartment 4 to obtain the air pressure value inside the battery compartment 4.

[0062] In some embodiments, the liquid-cooled energy storage cabinet further includes a first fire extinguishing device 15, which is located on the end face of the cabinet door 10 facing the battery compartment 4. The first fire extinguishing device 15 is configured to release a fire extinguishing medium when the battery pack 8 experiences thermal runaway. The first fire extinguishing device 15 plays a role in suppressing fire in the entire battery compartment 4. Specifically, the first fire extinguishing device 15 is preferably an aerosol fire suppression device. The first fire extinguishing device 15 is configured to release aerosol when the battery pack 8 experiences thermal runaway. The aerosol fills the entire battery compartment 4 to achieve rapid fire extinguishing, thereby improving the safety of the liquid-cooled energy storage cabinet.

[0063] In some embodiments, the liquid-cooled energy storage cabinet also includes a second fire extinguishing device 22, which is located in the equipment compartment 3. The output end of the second fire extinguishing device 22 is connected to a fire-fighting pipeline 9, one end of which extends to the battery compartment 4 and is connected to the battery pack 8. The second fire extinguishing device 22 is configured to deliver a fire extinguishing medium into the battery pack 8 in the event of thermal runaway. The second fire extinguishing device 22 plays a role in suppressing fire inside the battery pack 8. Specifically, the second fire extinguishing device 22 is preferably a perfluorohexanone fire extinguishing device, which can deliver perfluorohexanone fire extinguishing agent into the battery pack 8 through the fire-fighting pipeline 9. During the fire extinguishing process, perfluorohexanone can rapidly vaporize, absorbing a large amount of heat, thereby reducing the temperature of the combustion zone. At the same time, the gas formed after the perfluorohexanone vaporization can rapidly diffuse, reducing the oxygen concentration in the combustion zone, causing the combustion to stop due to insufficient oxidant, interrupting the chain reaction of combustion, and achieving high safety fire protection performance of the liquid-cooled energy storage cabinet.

[0064] It should be noted that perfluorohexanone is a highly efficient, safe, and environmentally friendly fire extinguishing agent. Its fire extinguishing principle is mainly based on its strong heat absorption capacity and ability to interrupt the combustion chain reaction. When a fire occurs, perfluorohexanone can evaporate rapidly, absorbing a large amount of heat energy, effectively reducing the temperature of the fire scene, and interrupting the combustion chain reaction through the fluorine atoms in its molecular structure, fundamentally extinguishing the flames and preventing reignition.

[0065] In some embodiments, the liquid-cooled energy storage cabinet also includes a dehumidifier 14, which is located on the side of the cabinet door 10 facing the battery compartment 4. The dehumidifier 14 is used to dehumidify the battery compartment 4 to ensure that the humidity inside the battery compartment 4 is within a set range. Based on this, a humidity sensor can also be installed inside the battery compartment 4 to obtain the humidity value of the battery compartment 4. The dehumidifier 14 is configured to start when the humidity value detected by the humidity sensor is greater than a set threshold and to turn off when the humidity value detected by the humidity sensor is less than the set threshold.

[0066] In some embodiments, the cabinet door 10 is provided with an air inlet window 11 corresponding to the equipment compartment 3, and the cabinet body 1 is provided with an air outlet window 17a. The air outlet window 17a and the air inlet window 11 are arranged opposite to each other in the second direction Y, so that the outside air can form convection in the equipment compartment 3, which is beneficial for air cooling of the electrical equipment in the equipment compartment 3.

[0067] In some embodiments, in order to facilitate the maintenance of electrical equipment in the equipment compartment 3, the cabinet 1 is provided with a maintenance door 17 corresponding to the equipment compartment 3, and the air inlet window 11 is located at the maintenance door 17. When it is necessary to maintain the electrical equipment in the equipment compartment 3, the maintenance door 17 can be opened without interfering with the battery compartment 4.

[0068] In some embodiments, both the air inlet window 11 and the air outlet window 17a are equipped with air inlet and outlet louvers 14 with an IP55 protection rating to improve the protection effect of the liquid-cooled energy storage cabinet.

[0069] In some embodiments, to facilitate the installation and removal of the battery pack 8, for this purpose, such as Figure 8 As shown, the inner wall of the cabinet 1 is provided with a first slide rail 28 extending along the second direction Y. The first slide rail 28 is symmetrically arranged on the opposite inner wall of the battery compartment 4. The battery pack 8 is slidably installed on the first slide rail 28. The first slide rail 28 is provided with a first limiting member 29 and a second limiting member 30 at opposite ends of the second direction Y. The first limiting member 29 and the second limiting member 30 are configured to limit the battery pack 8 in the second direction Y, so as to realize the positioning, installation and fixation of the battery pack 8.

[0070] In some embodiments, the equipment compartment 3 includes, from top to bottom in the third direction Z, a first air duct 301, a second air duct 302, and a third air duct 303; the liquid-cooled energy storage cabinet also includes an energy storage converter 5, a distribution box 6, and a liquid chiller 7. The energy storage converter 5 is located in the first air duct 301, and the battery pack 8 is electrically connected to the energy storage converter 5; the distribution box 6 and the second fire extinguishing device 22 are both located in the second air duct 302, and the energy storage converter 5 is electrically connected to the distribution box 6; the liquid chiller 7 is located in the third air duct 303, and the liquid chiller 7 is connected to the liquid cooling plate of the battery pack 8. By planning multiple air ducts, different electrical equipment can be installed in reasonable zones, promoting the integration and modularization of electrical equipment, making the structural layout of electrical equipment more compact and reducing space occupation.

[0071] It should be noted that in existing energy storage systems, the battery pack 8, distribution box 6, and energy storage converter 5 work together. The battery pack 8 provides energy storage and release functions, the distribution box 6 is responsible for energy distribution and protection, and the energy storage converter 5 converts and regulates energy according to the needs of electrical equipment. Specifically, the battery pack 8 is connected to the power grid through the energy storage converter 5 to achieve energy storage and release. Simultaneously, the distribution box ensures the safe and reliable distribution of energy, while the energy storage converter 5 is responsible for converting the energy released from the battery into a form of energy suitable for the power grid or electrical equipment, ensuring the stable operation and efficient development of the power system.

[0072] In some embodiments, an air intake area 304 is formed on the side of the equipment compartment 3 near the cabinet door 10, so that the cold air outside the unit can fully enter the equipment compartment 3 through the air intake window 11, effectively providing sufficient cold source for the energy storage converter 5, the distribution box 6 and the liquid chiller 7, and ensuring that the energy storage converter 5, the distribution box 6 and the liquid chiller 7 are always in a normal working environment.

[0073] In some embodiments, the liquid-cooled energy storage cabinet further includes an outlet pipe 34 and a return pipe 35. One end of the outlet pipe 34 is connected to the outlet end of the liquid cooler 7, and the other end is diverted to the liquid inlets of the liquid-cooled plates of multiple battery packs 8. One end of the return pipe 35 is connected to the return end of the liquid cooler 7, and the liquid return inlets of the multiple battery packs 8 converge into the return pipe 35. The liquid cooler 7 is used to achieve continuous circulation of the coolant, thereby ensuring that the battery packs 8 are always within the normal operating temperature range and reducing safety hazards. Figure 10 As shown, the coolant initially exits from the liquid cooler outlet into the outlet pipe 34, then enters the liquid cooling plate inside the battery pack 8 through the outlet pipe 34, where it exchanges heat with the heated battery cells. Finally, it flows back into the return pipe 35 through the drain port of the liquid cooling plate, and ultimately returns to the liquid cooler 7. The specific flow direction is shown in [details omitted]. Figure 10 Middle arrow.

[0074] In some embodiments, the liquid-cooled energy storage cabinet also includes a first fan 24, which is located on the side of the energy storage converter 5 near the air outlet window 17a. Integrating the first fan 24 with the energy storage converter 5 can effectively reduce the space occupied. In addition, the first fan 24 is close to the air outlet window 17a, thereby preventing cross-flow between the exhaust area and the intake area 304 of the energy storage converter 5 and improving the heat dissipation efficiency.

[0075] In some embodiments, the liquid-cooled energy storage cabinet further includes a second fan 25 and a third fan 26. The second fan 25 is located on the side of the distribution box 6 away from the air inlet window 11. The second fan 25 is integrated into the distribution box 6, which can reduce the space occupied by the equipment and can also dissipate heat from the distribution box 6 independently, thereby improving the heat dissipation effect of the distribution box 6. The third fan 26 is located on the side of the second air duct 302 near the air outlet window 17a. Specifically, the third fan 26 is closely connected to the air outlet window 17a to facilitate the exhaust of hot air in the second air duct 302, thereby further improving the heat dissipation efficiency of the equipment compartment 3.

[0076] In some embodiments, the liquid-cooled energy storage cabinet also includes a fourth fan 27, which is located on the side of the liquid cooler 7 near the air outlet window 17a. The fourth fan 27 is in close contact with the air outlet window 17a to prevent cross-flow between the exhaust area and the air inlet area 304 of the liquid cooler 7, thereby further improving the heat dissipation efficiency.

[0077] In some implementations, such as Figure 9 As shown, to facilitate the assembly of the energy storage converter 5, the inner wall of the cabinet 1 is provided with a second slide rail 32 extending along the second direction Y. The second slide rail 32 is positioned opposite the first air duct 301, thereby enabling the sliding assembly of the energy storage converter 5. Furthermore, the liquid-cooled energy storage cabinet also includes a crossbeam 32 and a bracket 33. The crossbeam 32 is located on the side of the first air duct 301 near the air inlet window 11. The crossbeam 32 extends along the first direction X and is connected to the partition 2. The bracket 33 extends along the third direction Z and connects the second slide rail 32 and the crossbeam 32. When the energy storage converter 5 is installed in place, the energy storage converter 5 is connected to and fixed with the bracket 33, thereby completing the fixed assembly, which is simple to operate.

[0078] In some embodiments, the partition 2 has a flange extending into the battery compartment 4, so that the partition 2 forms a disc-shaped structure to facilitate the collection of condensate from the battery pack 8, condensate on the surface of the outlet pipe 34, or leakage from the outlet pipe 34 and the return pipe 35, so as to avoid affecting the electrical equipment in the equipment compartment 3 and improve safety performance; furthermore, the partition 2 has a drain outlet 23; the liquid-cooled energy storage cabinet also includes a water receiving tray 21 and a drain pipe 20. The water receiving tray 21 is located at the bottom of the equipment compartment 3, and the drain pipe 20 connects the drain outlet 23 and the water receiving tray 21, so that the liquid collected by the partition 2 can be guided to the water receiving tray 21 through the drain pipe 20.

[0079] In some embodiments, the bottom of the drip tray 21 is provided with a floor drain to facilitate the drainage of water to the outside of the cabinet 1, for timely drainage of condensate from the liquid cooler 7 and the battery compartment 4. In other embodiments, to prevent the bottom of the cabinet 1 from contacting the drainage, a base can also be provided at the bottom of the cabinet 1 to lift the cabinet 1 off the ground in the third direction Z, thus preventing drainage obstruction or corrosion of the cabinet 1.

[0080] In some embodiments, in order to enable the liquid collected on the partition 2 to be quickly guided to the water receiving tray 21, the partition 2 is inclined and, along the third direction Z, the height of the end of the partition 2 near the air inlet window 11 is higher than the height of the end of the partition 2 near the air outlet window 17a. The drain outlet 23 is located at the end of the partition 2 near the air outlet window 17a. Thus, when the partition 2 is inclined, the liquid on the partition 2 can quickly flow to the drain outlet 23 and be guided to the water receiving tray 21 through the drain pipe 20.

[0081] In some embodiments, the tilt angle of the partition 2 is θ; wherein the tilt angle θ satisfies: 1°≤θ≤10°. As a preferred embodiment, the tilt angle θ is 2° to reduce the space occupied by the partition 2 in the third direction Z, thereby improving the utilization rate of the internal space of the liquid-cooled energy storage cabinet and reducing the overall space occupied by the liquid-cooled energy storage cabinet.

[0082] In some embodiments, the liquid-cooled energy storage cabinet also includes a display screen 13, a temperature sensor, and a control unit. The temperature sensor is arranged in the equipment compartment 3 and the battery compartment 4 to detect the ambient temperature inside the equipment compartment 3 and the battery compartment 4 and to feed the detected temperature back to the control unit. The display screen 13 is connected to the control unit and is used to display the operating temperature inside the equipment compartment 3 and the battery compartment 4. The energy storage converter 5, the power distribution box 6, and the liquid chiller 7 are all controlled by the control unit.

[0083] In some embodiments, the liquid-cooled energy storage cabinet also includes a fault light 16, which is electrically connected to the control unit. If the temperature of the equipment compartment 3 and the battery compartment 4 is abnormal, the control unit generates an abnormal command and sends it to the fault light 16. At this time, the fault light 16 lights up as a warning so that the staff can stop the machine for maintenance in time.

[0084] In other embodiments, the liquid-cooled energy storage cabinet may also be equipped with a buzzer, which, together with the fault light 16, serves as an alarm.

[0085] In some embodiments, the liquid-cooled energy storage cabinet also includes an emergency stop switch 12, which is connected to the control unit so that it can be manually stopped in an emergency to avoid losses.

[0086] The working process of this utility model is as follows: Please refer to... Figures 1 to 10 During operation, the coolant is discharged from the outlet of the liquid cooler into the outlet pipe 34, then enters the liquid cooling plate inside the battery pack 8 through the outlet pipe 34, where it exchanges heat with the heated battery cells. Finally, it enters the return pipe 35 through the drain port of the liquid cooling plate and returns to the liquid cooler 7. When thermal runaway occurs in the battery pack 8, there are four levels of protection:

[0087] 1. The first fire extinguishing device 15 can release aerosol in the battery compartment 4, and use the aerosol to fill the entire battery compartment 4 to achieve rapid cooling and fire extinguishing effects.

[0088] 2. The second fire extinguishing device 22 can directly deliver perfluorohexanone fire extinguishing agent into the battery pack 8. By utilizing the characteristic that perfluorohexanone can rapidly vaporize and absorb a large amount of heat during the fire extinguishing process, it can reduce the temperature and oxygen concentration in the combustion zone, interrupt the chain reaction of combustion, and achieve the effects of cooling and fire extinguishing.

[0089] 3. Fire extinguishing medium (such as perfluoropolyether fluid or fluorocarbon-based liquid) is directly filled into the battery compartment 4 through the fire connection 18, so that the battery pack 8 is completely submerged in the fire extinguishing medium, thereby achieving full immersion fire suppression.

[0090] 4. When the pressure inside the liquid-cooled energy storage cabinet increases, it can be relieved through the pressure relief valve 19 to avoid safety accidents such as explosions due to excessive pressure.

[0091] In summary, this utility model embodiment provides a liquid-cooled energy storage cabinet, which is a single-door energy storage cabinet formed by a cabinet body 1 and a cabinet door 10. This reduces the floor space occupied, and the partition 2 inside the cabinet body 1 divides the internal space into an equipment compartment 3 for storing electrical equipment and a battery compartment 4 for storing battery packs 8, effectively achieving partitioned arrangement of electrical equipment and battery packs and avoiding component redundancy. By providing a fire hydrant 18 connected to the battery compartment 4 in the cabinet body 1, full immersion fire suppression can be performed in the event of thermal runaway of the liquid-cooled energy storage cabinet, improving its safety performance. The pressure relief valve 19 can regulate the internal pressure of the liquid-cooled energy storage cabinet, preventing internal pressure buildup. Excessive or insufficient pressure can lead to safety accidents. A first fire extinguishing device 15 installed on the cabinet door 10 can release aerosols for rapid fire suppression in the event of thermal runaway of the battery pack 8. A second fire extinguishing device 22 further delivers perfluorohexanone extinguishing agent to the thermally runaway battery pack 8. Perfluorohexanone evaporates rapidly, absorbing a large amount of heat energy, effectively reducing the temperature of the fire and achieving rapid fire suppression. The use of aerosols and perfluorohexanone extinguishing agents avoids damage to the battery pack or electrical equipment inside the liquid-cooled energy storage cabinet. The combination of a fire hose connection 18, a pressure relief valve 19, the first fire extinguishing device 15, and the second fire extinguishing device 22 in this liquid-cooled energy storage cabinet achieves a four-level protection effect, significantly improving the safety of the liquid-cooled energy storage cabinet.

[0092] The above description is merely a preferred embodiment of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model. The basic principles, main features, and advantages of this utility model have been shown and described above. For those skilled in the art, it is obvious that this utility model is not limited to the details of the above preferred embodiments. The embodiments should be considered exemplary and non-limiting. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included within this utility model.

[0093] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A liquid-cooled energy storage cabinet, characterized in that, include: Cabinet (1), wherein the cabinet (1) is provided with a fire hydrant (18) and a pressure relief valve (19); The partition (2) is located in the cabinet (1) and divides the interior of the cabinet (1) into an equipment compartment (3) for placing electrical equipment and a battery compartment (4) for placing battery packs (8). The fire hydrant (18) and the pressure relief valve (19) are arranged corresponding to the battery compartment (4). Cabinet door (10), the cabinet door (10) is connected to the cabinet body (1); A first fire extinguishing device (15) is provided on the end face of the cabinet door (10) facing the battery compartment (4), and the first fire extinguishing device (15) is configured to release a fire extinguishing medium when the battery pack (8) experiences thermal runaway. as well as, A second fire extinguishing device (22) is located in the equipment compartment (3). The output end of the second fire extinguishing device (22) is connected to a fire-fighting pipe (9). One end of the fire-fighting pipe (9) extends to the battery compartment (4) and is connected to the battery pack (8). The second fire extinguishing device (22) is configured to deliver fire extinguishing medium to the battery pack (8) in the event of thermal runaway.

2. The liquid-cooled energy storage cabinet according to claim 1, characterized in that, It also includes a dehumidifier (14), which is located on the side of the cabinet door (10) facing the battery compartment (4).

3. The liquid-cooled energy storage cabinet according to claim 1, characterized in that, The liquid-cooled energy storage cabinet has a first direction (X), a second direction (Y) and a third direction (Z) that intersect each other. The cabinet door (10) is provided with an air inlet window (11) corresponding to the equipment compartment (3). The cabinet body (1) is provided with an air outlet window (17a). The air outlet window (17a) and the air inlet window (11) are arranged opposite to each other in the second direction (Y).

4. The liquid-cooled energy storage cabinet according to claim 3, characterized in that, The inner wall of the cabinet (1) is provided with a first slide rail (28) extending along the second direction (Y). The first slide rail (28) is located in the battery compartment (4). The battery pack (8) is slidably installed in the first slide rail (28). The first slide rail (28) is provided with a first limiting member (29) and a second limiting member (30) at opposite ends in the second direction (Y). The first limiting member (29) and the second limiting member (30) are configured to limit the battery pack (8) in the second direction (Y).

5. A liquid-cooled energy storage cabinet according to claim 3, characterized in that, The equipment compartment (3) includes, from top to bottom, a first air duct (301), a second air duct (302), and a third air duct (303) in the third direction (Z); Also includes: An energy storage converter (5) is provided in the first air duct (301), and the battery pack (8) is electrically connected to the energy storage converter (5). A distribution box (6), wherein the distribution box (6) and the second fire extinguishing device (22) are both located in the second air duct (302), and the energy storage converter (5) is electrically connected to the distribution box (6); and, A liquid cooler (7) is located in the third air duct (303) and is connected to the liquid cooling plate of the battery pack (8).

6. A liquid-cooled energy storage cabinet according to claim 5, characterized in that, Also includes: The first fan (24) is located on the side of the energy storage converter (5) near the air outlet window (17a); The second fan (25) is located on the side of the distribution box (6) away from the air inlet window (11); A third fan (26) is provided on the side of the second air duct (302) near the air outlet window (17a); and, A fourth fan (27) is located on the side of the liquid cooler (7) near the air outlet window (17a).

7. A liquid-cooled energy storage cabinet according to claim 3, characterized in that, The inner wall of the cabinet (1) is provided with a second slide rail (32) extending along the second direction (Y), and the second slide rail (32) is located in the first air duct (301); Also includes: A crossbeam (32) is located on the side of the first air duct (301) near the air inlet window (11), the crossbeam (32) extends along the first direction (X) and connects to the partition (2); and, A bracket (33) extends along the third direction (Z) and connects the second slide (32) and the crossbeam (32).

8. A liquid-cooled energy storage cabinet according to claim 3, characterized in that, The partition (2) has a flange extending toward the battery compartment (4), and the partition (2) has a drain outlet (23); Also includes: A water receiving tray (21) is provided in the equipment compartment (3); and, Drain pipe (20) is connected to drain outlet (23) and water receiving tray (21).

9. A liquid-cooled energy storage cabinet according to claim 8, characterized in that, The partition (2) is inclined and along the third direction (Z), the height of the end of the partition (2) near the air inlet window (11) is higher than the height of the end of the partition (2) near the air outlet window (17a), and the drain outlet (23) is located at the end of the partition (2) near the air outlet window (17a).

10. A liquid-cooled energy storage cabinet according to claim 9, characterized in that, The tilt angle of the partition (2) is θ; The tilt angle θ satisfies the following condition: 1°≤θ≤10°.

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