Sodium electricity industrial and commercial energy storage cabinet based on phase change gravity assisted heat pipe

Abstract

The invention belongs to the technical field of system heat management, and discloses a sodium electricity industrial and commercial energy storage cabinet based on a phase change gravity heat pipe. The cooling device comprises a cabinet body, a supporting mechanism, battery packs and a cooling mechanism, the cabinet body comprises a battery cabin, the supporting mechanism is arranged in the battery cabin, the multiple battery packs are placed on the supporting mechanism along the Z axis, the cooling mechanism comprises multiple cooling assemblies and multiple cooling fins, each battery pack is provided with at least one cooling assembly, and the cooling fins are arranged on the supporting mechanism. The cooling assembly comprises an evaporation chamber and a plurality of phase-change gravity heat pipes, phase-change working media are contained in the evaporation chamber, the two ends of each phase-change gravity heat pipe communicate with the evaporation chamber, the phase-change gravity heat pipes extend to one side of the supporting mechanism leftwards or rightwards in the X-axis direction, and each phase-change gravity heat pipe is provided with a first pipe section and a second pipe section which are different in height along the Z-axis. The outer walls of the multiple phase change gravity heat pipes located on the same side of the supporting mechanism are at least sleeved with one cooling fin. The cooling mechanism is simple in structure, a complex cooling liquid conveying pipeline is not needed, and the safety of the industrial and commercial energy storage cabinet is improved.

Description

Technical Field

[0001] This invention relates to the field of system thermal management technology, and in particular to a sodium electrical commercial energy storage cabinet based on a phase change gravity heat pipe. Background Technology

[0002] Commercial and industrial energy storage cabinets are modular energy storage systems specifically designed for industrial and commercial applications. They are primarily used for the storage, management, and optimized use of electrical energy. These cabinets integrate battery packs, battery management systems (BMS), and energy management systems (EMS) within a standardized cabinet, offering flexible deployment, high energy efficiency, and reliable operation. Battery packs require a specific temperature range to function properly; excessively high temperatures can negatively impact their performance and reduce their cycle life. Without effective cooling measures, thermal runaway can occur, leading to serious hazards.

[0003] In related technologies, commercial and industrial energy storage cabinets mainly adopt two technologies: air cooling and liquid cooling. Air cooling uses fans installed on the top or side of the cabinet to form a directional airflow for heat dissipation, but the heat dissipation efficiency is low and the temperature uniformity is poor. Liquid cooling uses coolant to circulate in pipes between battery packs, directly or indirectly contacting the battery modules for heat exchange, but the cost is high and there is a risk of leakage, requiring regular maintenance.

[0004] Therefore, there is a need to provide a sodium-based commercial energy storage cabinet with phase change gravity heat pipes to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a sodium-based commercial energy storage cabinet based on a phase change gravity heat pipe. It utilizes the vapor-liquid conversion of the phase change working fluid to achieve heat dissipation for the commercial energy storage cabinet, resulting in good heat dissipation, simple structure, and low safety risks.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A sodium-based commercial energy storage cabinet based on a phase change gravity heat pipe includes:

[0008] The cabinet includes a battery compartment, and the support mechanism is disposed within the battery compartment.

[0009] Battery packs, a plurality of the battery packs are placed at intervals along the Z-axis on the support mechanism;

[0010] The cooling mechanism includes multiple cooling components and multiple heat dissipation fins. Each battery pack is provided with at least one of the cooling components. The cooling component includes an evaporation chamber and multiple phase change gravity heat pipes. The evaporation chamber contains a phase change working fluid. Both ends of the phase change gravity heat pipes are connected to the evaporation chamber, and the phase change gravity heat pipes extend to the left or right along the X-axis to one side of the support mechanism. The phase change gravity heat pipes have a first pipe section and a second pipe section with a height difference along the Z-axis. At least one heat dissipation fin is fitted on the outer wall of the multiple phase change gravity heat pipes located on the same side of the support mechanism.

[0011] Preferably, the multiple phase change gravity heat pipes are divided into two groups of phase change gravity heat pipes, which are distributed at intervals along the X-axis. The multiple phase change gravity heat pipes located on the left side of the X-axis extend to the left along the X-axis to one side of the support mechanism, and the multiple phase change gravity heat pipes located on the right side of the X-axis extend to the right along the X-axis to one side of the support mechanism.

[0012] Preferably, the phase change gravity heat pipe further includes a third section, a fourth section, and a fifth section. The third and fourth sections both extend along the Z-axis and have different lengths. One end of the third section is connected to the evaporation chamber, and the other end is connected to one end of the first section. The other end of the first section has a first bidirectional shut-off valve. One end of the fourth section is connected to the evaporation chamber, and the other end is connected to one end of the second section. The other end of the second section has a second bidirectional shut-off valve. The fifth section has a U-shaped structure, and several heat dissipation fins are fitted onto the outer wall of the fifth section. The two ends of the fifth section are respectively connected to the first bidirectional shut-off valve and the second bidirectional shut-off valve, so that the phase change gravity heat pipe is connected in a loop.

[0013] Preferably, the cabinet is provided with a number of fans on one side along the Y-axis, and the fans are all facing the heat dissipation fins. The cabinet is provided with louvers on the other side along the Y-axis for ventilation.

[0014] Preferably, the inner and / or outer walls of the cabinet are provided with a first heat insulation element.

[0015] Preferably, the support mechanism includes:

[0016] Two support assemblies are spaced apart along the X-axis, the support assemblies having a clearance space extending through the X-axis, and the phase change gravity heat pipe can extend to one side of the support mechanism through the clearance space;

[0017] Multiple support components are distributed at intervals along the Z-axis, and the two ends of each support component are respectively connected to two bracket components. The battery pack is placed on the support component.

[0018] Preferably, the battery pack further includes:

[0019] The box has a receiving cavity, and the top of the box has an opening;

[0020] A battery module is fixedly housed in the accommodating cavity, and a cooling assembly is sealed over the opening and abuts against the battery module.

[0021] Preferably, a heat-conducting component is sandwiched between the cooling component and the battery module.

[0022] Preferably, the battery module includes:

[0023] A battery cell assembly includes multiple battery cells stacked along the Y-axis, with a second heat insulation element sandwiched between two adjacent battery cells.

[0024] The fixing assembly includes two end plates and multiple connectors. The two end plates are disposed on both sides of the battery cell assembly along the Y-axis. The two ends of the connectors are respectively fixed to the two end plates so that the fixing assembly clamps and fixes the battery cell assembly.

[0025] Preferably, the battery cell has a positive electrode and a negative electrode respectively disposed at both ends along the X-axis, and the positive and negative electrodes of two adjacent battery cells are arranged in opposite directions. The battery module also includes an aluminum bus assembly, with two aluminum bus assemblies respectively disposed at both ends of the battery cell assembly along the X-axis. The aluminum bus assembly includes:

[0026] Multiple aluminum bars, wherein the aluminum bars are connected to the positive and negative electrode plates of two adjacent battery cells;

[0027] The first insulating element is disposed between two adjacent aluminum bars.

[0028] The beneficial effects of this invention are:

[0029] This sodium-based commercial energy storage cabinet for electrical engineering includes a cabinet, a support mechanism, a battery pack, and a cooling mechanism. The cabinet includes a battery compartment, and the support mechanism is located inside the battery compartment. Multiple battery packs are placed on the support mechanism at intervals along the Z-axis. The cooling mechanism includes multiple cooling components and multiple heat dissipation fins. Each battery pack is provided with at least one cooling component. The cooling component includes an evaporation chamber and multiple phase change gravity heat pipes. The evaporation chamber contains a phase change working fluid. The two ends of the phase change gravity heat pipes are connected to the evaporation chamber, and the phase change gravity heat pipes extend to the left or right along the X-axis to one side of the support mechanism. The phase change gravity heat pipes have a first pipe section and a second pipe section with a height difference along the Z-axis. The outer wall of the multiple phase change gravity heat pipes located on the same side of the support mechanism is fitted with at least one heat dissipation fin.

[0030] During operation, this sodium-ion commercial energy storage cabinet generates heat from its battery packs. Each battery pack is equipped with at least one cooling component. The heat generated by the battery packs is conducted to the evaporation chamber of the cooling component. The phase change working fluid in the evaporation chamber absorbs the heat generated by the battery packs. Part of this heat is used to sublimate the phase change working fluid from a liquid state to a vapor state, and the other part is used to raise the temperature of the vaporized phase change working fluid. The vaporized phase change working fluid flows upward into the phase change gravity heat pipe and, driven by the pressure difference, flows within the phase change gravity heat pipe. The vaporized phase change working fluid flows to the first pipe section and then continues to flow to the section equipped with heat dissipation fins. At the location of the variable gravity heat pipe, the gaseous phase change working fluid transfers heat to the phase change gravity heat pipe, which then transfers the heat to the heat dissipation fins fitted on the outer wall. Because the heat dissipation fins have a large heat dissipation area, they can effectively and quickly conduct convective heat exchange with the surrounding air to dissipate heat into the surrounding environment, thereby cooling and reliquefying the phase change working fluid. The liquefied phase change working fluid flows back to the second pipe section under the action of gravity, and then continues to flow into the evaporation chamber to continue to participate in the next vaporization heat absorption, heat transfer and heat dissipation process, forming a circulating heat dissipation system to continuously dissipate heat from the battery pack.

[0031] Compared to related air-cooling and liquid-cooling systems, the cooling mechanism in this invention utilizes the vaporization and liquefaction process of a phase change working fluid for heat transfer. The phase change process of the working fluid absorbs a large amount of heat, quickly carrying away the heat generated by the battery pack, effectively reducing the battery pack temperature and ensuring uniform heat absorption to prevent localized overheating. The combination of a phase change gravity heat pipe and heat dissipation fins improves heat dissipation stability and efficiency, allowing the vaporized working fluid to quickly liquefy and fall into the evaporation chamber for further cooling of the battery pack. This cooling mechanism, through the combination of an evaporation chamber, phase change gravity heat pipe, and heat dissipation fins, achieves heat dissipation for the battery pack. Its simple structure eliminates the need for complex coolant delivery pipelines, reducing safety hazards caused by pipeline bursts and improving the safety and lifespan of the battery pack, thereby enhancing the safety and lifespan of this sodium-based commercial energy storage cabinet. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the sodium electrical commercial energy storage cabinet based on phase change gravity heat pipe provided by the present invention, with one wall of the cabinet hidden.

[0033] Figure 2 This is a schematic diagram of the battery pack and cooling mechanism provided by the present invention;

[0034] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0035] Figure 4This is a schematic diagram of the battery pack and some cooling components provided by the present invention;

[0036] Figure 5 This is a structural schematic diagram of the cabinet and support mechanism provided by the present invention;

[0037] Figure 6 This is a partial structural schematic diagram of the battery pack provided by the present invention;

[0038] Figure 7 This is a schematic diagram of the battery cell assembly and fixing components provided by the present invention;

[0039] Figure 8 This is a schematic diagram of the structure of the second insulating component provided by the present invention;

[0040] Figure 9 This is a schematic diagram of the battery cell structure provided by the present invention;

[0041] Figure 10 This is a schematic diagram of the battery module provided by the present invention;

[0042] Figure 11 This is a schematic diagram of the structure of the aluminum bar assembly provided by the present invention.

[0043] In the picture:

[0044] 1. Cabinet; 11. Battery compartment;

[0045] 2. Support mechanism; 21. Frame assembly; 211. Frame body; 22. Supporting assembly; 221. Supporting component;

[0046] 3. Battery pack; 31. Housing; 311. Receptacle; 32. Battery module; 321. Cell assembly; 3211. Cell; 32111. Positive electrode; 32112. Negative electrode; 3212. Second heat insulation component; 3213. Second insulation component; 322. Fixing assembly; 3221. End plate; 3222. Connector; 323. Aluminum busbar assembly; 3231. Aluminum busbar; 3232. First insulation component; 324. Copper busbar; 33. Mounting plate;

[0047] 4. Cooling mechanism; 41. Cooling components; 411. Evaporation chamber; 412. Phase change gravity heat pipe; 4121. First pipe section; 4122. Second pipe section; 4123. Third pipe section; 4124. Fourth pipe section; 4125. Fifth pipe section; 42. Heat dissipation fins. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0049] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0052] like Figures 1-11As shown, this embodiment provides a sodium-based commercial energy storage cabinet with a phase change gravity heat pipe. This cabinet includes a cabinet body 1, a support mechanism 2, battery packs 3, and a cooling mechanism 4. The cabinet body 1 includes a battery compartment 11, the support mechanism 2 is disposed within the battery compartment 11, and multiple battery packs 3 are spaced apart along the Z-axis on the support mechanism 2. The cooling mechanism 4 includes multiple cooling components 41 and multiple heat dissipation fins 42. Each battery pack 3 is provided with at least one cooling component 41. The component 41 includes an evaporation chamber 411 and a plurality of phase change gravity heat pipes 412. The evaporation chamber 411 contains a phase change working fluid. The two ends of the phase change gravity heat pipes 412 are connected to the evaporation chamber 411. The phase change gravity heat pipes 412 extend to the left or right along the X-axis to one side of the support mechanism 2. The phase change gravity heat pipes 412 have a first pipe section 4121 and a second pipe section 4122 with a height difference along the Z-axis. At least one heat dissipation fin 42 is fitted on the outer wall of the plurality of phase change gravity heat pipes 412 located on the same side of the support mechanism 2.

[0053] Cabinet 1 provides the mechanical support and structural frame for the entire sodium-electric commercial energy storage cabinet. Cabinet 1 includes a battery compartment 11 specifically designed to house battery packs 3 and a cooling mechanism 4. A support mechanism 2, located inside the battery compartment 11, directly supports and secures multiple battery packs 3 stacked along the Z-axis, ensuring that the battery packs 3 are stably and orderly stacked within the battery compartment 11. The battery packs 3, as the core unit of the sodium-electric commercial energy storage cabinet, are capable of storing and releasing electrical energy. It should be noted that cabinet 1 also includes an electrical compartment, which is used to install electrical equipment such as high-voltage boxes and PCS. The structure and layout of the electrical compartment refer to existing sodium-electric commercial energy storage cabinets, and this embodiment does not limit this aspect.

[0054] For ease of description, in this embodiment, the higher section on the Z-axis is defined as the first segment 4121 of the phase change gravity heat pipe 412, and the lower section on the Z-axis is defined as the second segment 4122 of the phase change gravity heat pipe 412.

[0055] In this embodiment, when the sodium electrical commercial energy storage cabinet is in operation, the battery pack 3 generates heat. Each battery pack 3 is equipped with at least one cooling component 41. The heat generated by the battery pack 3 is conducted to the evaporation chamber 411 of the cooling component 41. The phase change working fluid in the evaporation chamber 411 absorbs the heat generated by the battery pack 3. Part of this heat is used to sublimate the phase change working fluid from a liquid state to a vapor state, and the other part is used to raise the temperature of the vaporized phase change working fluid. The vaporized phase change working fluid flows upward into the phase change gravity heat pipe 412 and flows in the phase change gravity heat pipe 412 under the pressure difference. The vaporized phase change working fluid flows to the first pipe section 4121 and then continues to flow to the section equipped with heat dissipation fins. At the location of the phase change gravity heat pipe 412 on plate 42, the gaseous phase change working fluid transfers heat to the phase change gravity heat pipe 412, which in turn transfers heat to the heat dissipation fins 42 fitted on the outer wall. Since the heat dissipation fins 42 have a large heat dissipation area, they can effectively and quickly exchange heat with the surrounding air through convection to dissipate heat into the surrounding environment, thereby cooling and reliquefying the phase change working fluid. The liquefied phase change working fluid flows back to the second pipe section 4122 under the action of gravity, and then continues to flow into the evaporation chamber 411 to continue to participate in the next vaporization heat absorption, heat transfer and heat dissipation process, forming a circulating heat dissipation system to continuously dissipate heat from the battery pack 3.

[0056] Compared to related air-cooling and liquid-cooling systems, the cooling mechanism 4 in this embodiment utilizes the vaporization and liquefaction process of the phase change working fluid for heat transfer. The phase change process of the working fluid absorbs a large amount of heat, quickly carrying away the heat generated by the battery pack 3, effectively reducing the temperature of the battery pack 3, and ensuring that the heat of the battery pack 3 is absorbed evenly, avoiding localized overheating. The combination of the phase change gravity heat pipe 412 and the heat dissipation fins 42 results in better heat dissipation stability and higher heat dissipation efficiency, allowing the vaporized phase change working fluid to quickly liquefy and fall into the evaporation chamber 411, re-cooling the battery pack 3. This cooling mechanism 4 achieves heat dissipation for the battery pack 3 through the combination of the evaporation chamber 411, the phase change gravity heat pipe 412, and the heat dissipation fins 42. Its simple structure eliminates the need for complex coolant delivery pipelines, reducing safety hazards caused by pipeline bursts and other malfunctions, improving the safety and service life of the battery pack 3, and consequently improving the safety and service life of this sodium electrical commercial energy storage cabinet.

[0057] It should be noted that the number of cooling mechanisms 4 on each battery pack 3 is not limited, as long as the area of ​​the evaporation chambers 411 of several cooling mechanisms 4 can cover the entire battery module 32 placed inside the battery pack 3, ensuring that the battery module 32 inside the battery pack 3 can transfer heat to the evaporation chambers 411 of the cooling mechanisms 4 in a timely manner when it generates heat. Figure 4As shown, in this embodiment, each battery pack 3 is provided with a cooling mechanism 4, and the area of ​​the evaporation chamber 411 of the cooling mechanism 4 is the same as the surface area of ​​the top surface of the battery module 32.

[0058] In an optional embodiment, multiple phase change gravity heat pipes 412 on multiple battery packs 3 extend to the left along the X-axis to the left side of the support mechanism 2. At this time, the outer wall of each of the multiple phase change gravity heat pipes 412 is fitted with at least one heat dissipation fin 42. In this case, the heat dissipation fin 42 is arranged only on the left side of the support mechanism 2.

[0059] In another optional embodiment, multiple phase change gravity heat pipes 412 on multiple battery packs 3 extend to the right along the X-axis to the right side of the support mechanism 2. At this time, the outer wall of each of the multiple phase change gravity heat pipes 412 is fitted with at least one heat dissipation fin 42. In this case, the heat dissipation fin 42 is arranged only on the right side of the support mechanism 2.

[0060] In another optional embodiment, a plurality of phase change gravity heat pipes 412 of some battery packs 3 extend to the left along the X-axis to the left side of the support mechanism 2, and a plurality of phase change gravity heat pipes 412 of other battery packs 3 extend to the right along the X-axis to the right side of the support mechanism 2. At this time, the outer wall of the plurality of phase change gravity heat pipes 412 located on the left side is fitted with at least one heat dissipation fin 42, and the outer wall of the plurality of phase change gravity heat pipes 412 located on the right side is fitted with at least one heat dissipation fin 42.

[0061] In this embodiment, as Figures 2-4 As shown, multiple phase change gravity heat pipes 412 are divided into two groups, which are spaced apart along the X-axis. Multiple phase change gravity heat pipes 412 located on the left side of the X-axis extend to the left of the support mechanism 2, while multiple phase change gravity heat pipes 412 located on the right side of the X-axis extend to the right of the support mechanism 2. Dividing the multiple phase change gravity heat pipes 412 into two groups, and having each group extend to both sides of the support mechanism 2, fully utilizes the space on both sides of the support mechanism 2. This avoids the space constraints and potential mutual interference caused by crowding all the phase change gravity heat pipes 412 onto one side, and also facilitates the formation of smoother airflow channels around the phase change gravity heat pipes 412, preventing airflow channel blockage caused by dense arrangement and improving heat dissipation efficiency.

[0062] Furthermore, such as Figure 4 As shown, multiple phase change gravity heat pipes 412 in the same group of phase change gravity heat pipes are spaced apart along the Y-axis. Two groups of phase change gravity heat pipes are distributed spaced apart along the X-axis, and multiple phase change gravity heat pipes 412 in each group are spaced apart along the Y-axis, so that multiple phase change gravity heat pipes 412 can be more evenly arranged on the evaporation chamber 411, ensuring that the cooling mechanism 4 can evenly dissipate the heat of the battery pack 3 and avoid local temperature unevenness.

[0063] In some embodiments, a heat dissipation fin 42 is provided on one side of the support mechanism 2.

[0064] In other embodiments, such as Figure 2 As shown, multiple heat dissipation fins 42 are simultaneously provided on one side of the support mechanism 2, and the multiple heat dissipation fins 42 are distributed at intervals along the X-axis. The multiple heat dissipation fins 42 dissipate heat together, increasing the contact area with the air, so that the heat can be more fully transferred to the surrounding air through convection. The intervals between the multiple heat dissipation fins 42 provide airflow channels. When the air flows through the heat dissipation fins 42, the existence of the intervals allows the air to flow more smoothly between the heat dissipation fins 42, forming a good convection environment.

[0065] Optionally, such as Figures 2-4 As shown, the phase change gravity heat pipe 412 also includes a third pipe section 4123, a fourth pipe section 4124, and a fifth pipe section 4125. The third pipe section 4123 and the fourth pipe section 4124 both extend along the Z-axis, and their lengths are different. One end of the third pipe section 4123 is connected to the evaporation chamber 411, and the other end of the third pipe section 4123 is connected to one end of the first pipe section 4121. The other end of the first pipe section 4121 has a first bidirectional cutoff. The valve, one end of the fourth pipe section 4124 is connected to the evaporation chamber 411, the other end of the fourth pipe section 4124 is connected to one end of the second pipe section 4122, the other end of the second pipe section 4122 has a second bidirectional shut-off valve, the fifth pipe section 4125 has a U-shaped structure, a number of heat dissipation fins 42 are sleeved on the outer wall of the fifth pipe section 4125, and the two ends of the fifth pipe section 4125 are respectively connected to the first bidirectional shut-off valve and the second bidirectional shut-off valve, so that the phase change gravity heat pipe 412 is connected to form a loop.

[0066] By setting a third pipe segment 4123 and a fourth pipe segment 4124 extending along the Z-axis and having different lengths, the first pipe segment 4121 and the second pipe segment 4122 can be connected to the evaporation chamber 411 through the third pipe segment 4123 and the fourth pipe segment 4124 respectively, and the first pipe segment 4121 and the second pipe segment 4122 have a height difference on the Z-axis; by setting a first bidirectional shut-off valve and a second bidirectional shut-off valve at the other end of the first pipe segment 4121 and the other end of the second pipe segment 4122, the fifth pipe segment 4125 is nested in the heat dissipation fins 42. When assembling this sodium electrical commercial energy storage cabinet, after the battery pack 3 is placed on the support mechanism 2, several heat dissipation fins 42 with the fifth pipe segment 4125 nested are placed on one side of the support mechanism 2, so that the fifth pipe segment 4125 is connected to the first pipe segment 4121 and the second pipe segment 4122 through the first bidirectional shut-off valve and the second bidirectional shut-off valve to form a circuit. This split-type phase change gravity heat pipe 412 allows the first section 4121, the second section 4122, the third section 4123, and the fourth section 4124 to be located on the battery pack 3, while the fifth section 4125 is nested within the heat dissipation fins 42. This simplifies and speeds up the assembly of commercial sodium-electric energy storage cabinets, eliminating the need to consider interference between the phase change gravity heat pipe 412 and the support mechanism 2, or how to nest the heat dissipation fins 42 within a limited space. Furthermore, the flow rate of the phase change working fluid can be adjusted via the first and second bidirectional shut-off valves, enabling dynamic thermal management.

[0067] When the battery pack 3 generates heat due to temperature rise, the heat is conducted to the evaporation chamber 411 of the cooling assembly 41. The phase change working fluid in the evaporation chamber 411 absorbs the heat generated by the battery pack 3 to reduce its temperature. Part of the heat absorbed by the phase change working fluid from the battery pack 3 is used to sublimate the phase change working fluid from a liquid state to a vapor state, and the other part is used to raise the temperature of the vaporized phase change working fluid. The vaporized phase change working fluid rises and enters the third pipe section 4123, and under the pressure difference, flows to the first pipe section 4121, and then flows... In the fifth pipe section 4125, the gaseous phase change working fluid transfers heat to the fifth pipe section 4125, which in turn transfers the heat to the heat dissipation fins 42 fitted on the outer wall. Since the heat dissipation fins 42 have a large heat dissipation area, they can effectively and quickly exchange heat with the surrounding air through convection to dissipate the heat into the surrounding environment, thereby cooling and reliquefying the phase change working fluid. The liquefied phase change working fluid flows back to the second pipe section 4122 under the action of gravity, and then continues to flow to the fourth pipe section 4124, and finally falls back into the evaporation chamber 411.

[0068] In this embodiment, a hydrophilic film is provided on the inner wall of the connection between the third pipe section 4123 and the evaporation chamber 411. On the one hand, the hydrophilic film can prevent gas blockage, ensure the stability of the flow of the gaseous phase change working fluid, and avoid flow fluctuations caused by gas resistance; on the other hand, the hydrophilic film can reduce the resistance to the flow of the gaseous phase change working fluid, so that the gaseous phase change working fluid can enter the phase change gravity heat pipe 412 more smoothly and improve the heat dissipation efficiency.

[0069] It should be noted that the design of the cooling component 41 needs to consider the phase change state of the liquid and vapor phases of the internal phase change working fluid. The VOF model is introduced to systematically calculate its phase change process. Considering that the flow of the working fluid inside the phase change gravity heat pipe 412 is affected by surface tension, a continuous tension model of surface tension needs to be established.

[0070]

[0071] in, It is the surface tension coefficient, a physical property parameter of the phase change working fluid; These are the radii of curvature of the vapor and liquid phases of the phase change working fluid, respectively, which need to be obtained through experimental observation or VOF multiphase flow simulation. These are the densities of the liquid and vapor phases of the phase change working fluid, respectively, and are presented in the phase change working fluid property table. , It represents the volume fraction of the liquid and vapor phases of the phase change working fluid, which needs to be calculated in real time using VOF simulation.

[0072] This formula describes the surface tension effect at the vapor-liquid interface, used to determine whether the phase change working fluid can form stable bubbles during vaporization or a continuous liquid film reflux during liquefaction. This guides the geometric and dimensional design of the cooling assembly 41, ensuring that the phase change working fluid can wet the wall of the phase change gravity heat pipe 412, preventing "dry burning" or liquid film breakage, and ensuring effective reflux of the phase change working fluid. In other words, this formula allows for the design of the shape and dimensions of the evaporation chamber 411 and the phase change gravity heat pipe 412 that meet the requirements.

[0073] Based on the continuity equation, the momentum equation for the phase transition working fluid during the phase transition can be obtained:

[0074]

[0075] in, It is the density of the phase change working fluid, which is calculated by weighting the physical properties and volume fraction of the phase change working fluid. It is a velocity vector, which needs to be obtained through solving and is the objective variable; It refers to time, specifically the time step in a simulation or experiment. It is the acceleration due to gravity, which is a constant; It is pressure, which needs to be determined through a solution; It is the dynamic viscosity, calculated by weighting the phase change working fluid properties and volume fraction. It is a unit tensor and is a constant.

[0076] This formula predicts the flow velocity of the phase change working fluid within the phase change gravity heat pipe 412, determines whether the reflux requirement is met, analyzes the pressure difference within the phase change gravity heat pipe 412, drives the circulation of the phase change working fluid, avoids flow stagnation or localized high pressure, verifies the effect of gravity on reflux, and ensures that the liquid phase change working fluid can smoothly return to the evaporation chamber 411. In other words, this formula simulates the velocity distribution of the phase change working fluid within the phase change gravity heat pipe 412, thereby optimizing the diameter, length, and other parameters of the phase change gravity heat pipe 412 to improve flow efficiency.

[0077] By combining the continuity equation with heat transfer, we can obtain the energy equation for the phase change working fluid during phase change:

[0078]

[0079] in, It is energy, derived from the latent heat of vaporization and internal heat. It is temperature, determined by the temperature of the battery cell 3211 in battery pack 3 and the internal temperature of the phase change gravity heat pipe 412; It is the thermal conductivity, specifically the thermal conductivity of the phase change working fluid in the liquid phase. It is an energy source item, determined by the operating conditions of battery pack 3; It is a velocity vector, which is obtained by solving the momentum equations simultaneously.

[0080] This formula is used to predict the temperature distribution of each section in the phase change gravity heat pipe 412, verify the overall thermal balance performance of the phase change gravity heat pipe 412, ensure that the cooling component 41 can efficiently absorb the heat generated by the battery cell 3211, fully release the heat to the external environment, and predict the uniformity of temperature distribution inside the battery pack 3, so as to avoid local overheating or insufficient heat dissipation, thereby optimizing the performance of the phase change gravity heat pipe 412.

[0081] In the cooling assembly 41, the liquid filling rate of the phase change working fluid in the evaporation chamber 411 also needs to be considered. If the liquid filling rate is too small, the evaporation of the phase change working fluid will be too large, but the condensation will be insufficient, resulting in the excess heat in the battery pack 3 not being absorbed, leading to poor cooling performance of the cooling assembly 41. If the liquid filling rate is too large, the internal thermal resistance of the evaporation chamber 411 will increase. When the heat generation power of the battery pack 3 is relatively small, the temperature has not yet reached complete boiling, and heat transfer relies solely on the evaporation of the liquid film. Furthermore, excess liquid will form accumulation pits, hindering the evaporation of the liquid film and increasing the thermal resistance of the phase change working fluid. Therefore, the liquid filling rate is calculated using the Streltsov model:

[0082]

[0083] in, This is the length of the evaporation section, corresponding to evaporation chamber 411; It is the length of the condensation section, corresponding to the fifth pipe section 4125 embedded in the heat dissipation fins 42 on both sides of the support mechanism 2; This refers to the length of the adiabatic section, corresponding to the portion of the phase-change gravity heat pipe 412 that connects the evaporation chamber 411 and the condensation section. It is the cross-sectional area of ​​the phase change gravity heat pipe 412. Q is the latent heat of vaporization of the phase change working fluid, and Q is the heat flow rate. That is, the liquid filling rate of the phase change working fluid is determined based on the length and cross-sectional area of ​​each section of the cooling component 41.

[0084] In this embodiment, the phase change working fluid is trifluorotrichloroethane (R113). R113 has a low boiling point at the saturated vapor pressure corresponding to the operating temperature of the phase change gravity heat pipe 412, and the vapor formed can well wet the wall surface of the phase change gravity heat pipe 412 to form a continuous liquid film that can be refluxed. It also has a high thermal conductivity and latent heat of vaporization, large surface tension, low viscosity, and is economical and environmentally friendly.

[0085] Optionally, a number of fans are installed on one side of the cabinet 1 along the Y-axis, each fan facing a number of heat dissipation fins 42. Louvers are installed on the other side of the cabinet 1 along the Y-axis for ventilation. The fans, facing the heat dissipation fins 42, accelerate airflow across the surface of the fins 42, quickly removing heat released from the condensation section and improving the circulation efficiency of the cooling mechanism 4. The air inside the cabinet 1, carrying heat, is exhausted through the louvers on the other side, forming a unidirectional linear airflow and preventing hot air recirculation.

[0086] It should be noted that the fan's on / off state and speed are dynamically adjusted according to the temperature of the battery compartment 11, further reducing energy consumption.

[0087] Optionally, the inner and / or outer walls of the cabinet 1 are provided with a first heat insulation component. The first heat insulation component can block the influence of external high or low temperatures on the battery compartment 11, maintain the temperature stability inside the battery compartment 11; and by providing the first heat insulation component, the temperature difference between the inner and outer sides of the cabinet 1 can be reduced, condensation can be avoided on the inner wall of the cabinet 1, and problems such as electrical short circuits caused by water vapor can be prevented.

[0088] In some embodiments, the inner wall of the cabinet 1 is provided with a first heat insulation component; in other embodiments, the outer wall of the cabinet 1 is provided with a first heat insulation component; in still other embodiments, both the inner and outer walls of the cabinet 1 are provided with first heat insulation components. The specific configuration depends on actual needs, and this embodiment does not limit it.

[0089] Specifically, the first thermal insulation component can be rock wool board, metal composite thermal insulation board, etc. Any structure capable of thermal insulation in the prior art can be used as the first thermal insulation component in this embodiment, and this embodiment does not limit it. The first thermal insulation component can be installed on the inner wall and / or outer wall of the cabinet 1 by means of adhesive fixing, bolt pressure plate fixing, etc., and the specific installation method is not limited in this embodiment.

[0090] Optionally, such as Figure 1 , Figure 5 As shown, the support mechanism 2 includes multiple support components 22 and two bracket components 21 spaced apart along the X-axis. Each bracket component 21 has a clearance space extending through the X-axis, allowing the phase change gravity heat pipe 412 to extend to one side of the support mechanism 2. The multiple support components 22 are spaced apart along the Z-axis, with each end of the support component 22 connected to one of the two bracket components 21. The battery pack 3 is placed on the support component 22. The two bracket components 21 are spaced apart along the X-axis, and the clearance space provides a mounting base for the multiple support components 22 arranged along the Z-axis. Furthermore, when the battery pack 3 is placed on the support mechanism 2, the phase change gravity heat pipe 412 can extend to the left or right of the support mechanism 2 through the clearance space, preventing interference between the phase change gravity heat pipe 412 and the support structure. The multiple support components 22 are spaced apart along the Z-axis, allowing the multiple battery packs 3 to be stably placed layer by layer along the Z-axis.

[0091] In this embodiment, as Figure 5 As shown, the bracket assembly 21 includes two bracket bodies 211 spaced apart along the Y-axis, with a clearance space between the two bracket bodies 211. Specifically, the two ends of the bracket bodies 211 are connected to the inner wall of the cabinet 1 by means of riveting, welding, threaded connection, etc. By setting two bracket bodies 211 spaced apart along the Y-axis, a clearance space can be easily formed, eliminating the need for post-processing, saving costs, and making production simple and quick.

[0092] In this embodiment, as Figure 5 As shown, the support assembly 22 includes two support members 221, which are respectively disposed on two bracket assemblies 21. The two support members 221 together support a battery pack 3. Specifically, the support members 221 are connected to the two bracket bodies 211 of the bracket assembly 21 by means of riveting, welding, threaded connection, etc. This design can reduce the amount of material used in the support assembly 22 without affecting the normal performance of the support assembly 22.

[0093] Optionally, such as Figure 6As shown, the battery pack 3 also includes a housing 31 and the aforementioned battery module 32. The housing 31 has a receiving cavity 311, and the top of the housing 31 has an opening. The battery module 32 is fixedly housed in the receiving cavity 311, and the cooling assembly 41 is sealed over the opening and abuts against the battery module 32. By abutting the cooling assembly 41 against the battery module 32, the heat generated by the battery module 32 can be directly transferred to the cooling assembly 41 when the battery pack 3 is working, making heat transfer more direct and faster.

[0094] Specifically, such as Figure 4 As shown, the cooling assembly 41 also includes a mounting plate 33, on which the evaporation chamber 411 is disposed. The mounting plate 33 can seal the opening and is fixedly connected to the housing 31. By providing the mounting plate 33, the cooling assembly 41 can be installed on the housing 31 more easily and quickly, solving the problem of the difficulty of directly fixing the evaporation chamber 411 to the housing 31.

[0095] Optionally, the mounting plate 33 is threadedly connected to the housing 31. It is understood that it can also be connected by adhesive or other methods; this embodiment does not limit this connection.

[0096] Specifically, a sealing element is provided between the housing 31 and the cooling assembly 41 so that the cooling assembly 41 can seal the opening of the housing 31. The sealing element can be a rubber ring.

[0097] In one optional embodiment, a heat-conducting component is sandwiched between the cooling component 41 and the battery module 32. By sandwiching a heat-conducting component between the cooling component 41 and the battery module 32, the heat exchange rate between the battery module 32 and the cooling component 41 can be accelerated, allowing the heat generated by the battery module 32 to be quickly transferred to the cooling component 41 and released to the surrounding environment, thus enabling the battery module 32 to be cooled in a timely manner.

[0098] Specifically, the heat-conducting component is sandwiched between the mounting plate 33 and the battery module 32.

[0099] Optionally, such as Figure 7As shown, the battery module 32 includes a cell assembly 321 and a fixing assembly 322. The cell assembly 321 includes multiple cells 3211, which are stacked along the Y-axis, and a second heat insulation member 3212 is sandwiched between two adjacent cells 3211. The fixing assembly 322 includes two end plates 3221 and multiple connectors 3222. The two end plates 3221 are disposed on both sides of the cell assembly 321 along the Y-axis, and the two ends of the connectors 3222 are respectively fixed to the two end plates 3221, so that the fixing assembly 322 clamps and fixes the cell assembly 321. By sandwiching a second heat insulation component 3212 between two adjacent cells 3211, the heat from cell 3211 can be prevented from affecting the adjacent cells 3211. When a single cell 3211 experiences thermal runaway, the second heat insulation component 3212 can prevent the heat from spreading from the thermally runaway cell 3211, avoiding a chain reaction, reducing the risk of thermal runaway of the entire battery module 32, and improving the safety of the battery module 32. The cell assembly 321 is clamped and fixed by two end plates 3221 and multiple connectors 3222 to fix the battery module 32 as a whole, ensuring that there is no relative displacement between the multiple cells 3211 and ensuring the stability of the cell assembly 321. The battery module 32 can be stably fixed in the housing 31 by the two end plates 3221. When the battery module 32 is subjected to external pressure or collision, the two end plates 3221 can protect the cell assembly 321.

[0100] Specifically, the second thermal insulation element 3212 is an aerogel patch.

[0101] In this embodiment, the battery cell 3211 is a sodium-ion blade battery cell. Compared with lithium iron phosphate battery cells, lithium-ion blade battery cells are less sensitive to temperature, less prone to thermal runaway, and have higher safety performance.

[0102] For example, in this embodiment, the number of battery cells 3211 is 45, and the 45 battery cells 3211 are stacked along the Y-axis. It is understood that the specific number of battery cells 3211 depends on actual needs, and this embodiment does not limit it.

[0103] In this embodiment, there are four connectors 3222. The four connectors 3222 are respectively located at the four corners of the end plate 3221. The connectors 3222 and the end plate 3221 are fixed together by bolts.

[0104] Specifically, the end plate 3221 has multiple lifting holes, which allow the lifting mechanism to easily lift the battery module 32 and place it inside the housing 31.

[0105] Optionally, such as Figure 7 , Figure 8As shown, a second insulating element 3213 is provided between the end of the battery cell assembly 321 and the end plate 3221. By providing the second insulating element 3213, the battery cell assembly 321 and the end plate 3221 are insulated from each other, thus isolating the electrical connection between the battery cell assembly 321 and the end plate 3221 and avoiding the risk of short circuit. By providing the second insulating element 3213, the second insulating element 3213 is in direct contact with the end plate 3221, preventing the battery cells 3211 at both ends of the battery cell assembly 321 from contacting and wearing with the end plate 3221, and ensuring the safety performance of the battery cells 3211.

[0106] In one alternative embodiment, plastic patches are attached to the side of the battery cell assembly 321 facing the end plate 3221 to form a second insulating element 3213.

[0107] Optionally, such as Figure 7 , Figure 9 , Figure 10 and Figure 11 As shown, positive electrode 32111 and negative electrode 32112 are respectively arranged at both ends of the cell 3211 along the X-axis. The positive electrode 32111 and negative electrode 32112 of two adjacent cells 3211 are arranged in opposite directions. The battery module 32 also includes an aluminum bar assembly 323. Two aluminum bar assemblies 323 are respectively arranged at both ends of the cell assembly 321 along the X-axis. The aluminum bar assembly 323 includes multiple aluminum bars 3231 and a first insulating member 3232. The aluminum bars 3231 are connected to the positive electrode 32111 and negative electrode 32112 of two adjacent cells 3211. The first insulating member 3232 is arranged between two adjacent aluminum bars 3231.

[0108] The arrangement of the battery cells 3211 is such that the positive electrode 32111 and negative electrode 32112 of two adjacent battery cells 3211 are in opposite directions. That is, the positive electrode 32111 of a certain battery cell 3211 is located on the right and the negative electrode 32112 is located on the left. The positive electrode 32111 of the adjacent battery cell 3211 is located on the left and the negative electrode 32112 is located on the right, so that the battery cells 3211 in the battery cell group 321 have alternating positive and negative electrode 32112. Aluminum battery pack 323 The aluminum bar assembly 323 is arranged on both sides of the cell group 321 along the X-axis and includes multiple aluminum bars 3231. Each aluminum bar 3231 connects the positive electrode 32111 and the negative electrode 32112 of two adjacent cells 3211 to connect the multiple cells 3211 of the cell group 321 in series to form a complete current path. The first insulating member 3232 is arranged between two adjacent aluminum bars 3231 to isolate the two adjacent aluminum bars 3231, ensure a certain creepage distance, and prevent short circuit.

[0109] Optionally, the aluminum bar 3231 is connected to the positive electrode 32111 / negative electrode 32112 of the battery cell 3211 by welding to ensure that the aluminum bar 3231 can make close contact with the positive electrode 32111 / negative electrode 32112 of the battery cell 3211, thus ensuring the reliability of conductivity.

[0110] Specifically, the first insulator 3232 not only prevents short circuits, but also increases the structural strength of the aluminum bar assembly 323, resists vibration and impact, and extends its service life.

[0111] In one optional embodiment, a voltage probe and a temperature probe are soldered onto the aluminum bar 3231 to measure the voltage and temperature of each cell 3211. The voltage probe and the temperature probe are communicatively connected to the battery management system (BMS) component of the battery pack 3 via signal lines.

[0112] Optionally, such as Figure 10 As shown, the battery pack 3 also includes a copper busbar 324 and a connector. The connector is mounted on the housing 31. The positive electrode 32111 of the first cell 3211 and the negative electrode 32112 of the last cell 3211 are connected to the connector via the copper busbar 324. The positive electrode 32111 of the first cell 3211 and the negative electrode 32112 of the last cell 3211 are the total positive and total negative electrodes of the cell group 321. By connecting the total positive and total negative electrodes to the connector on the housing 31 via the copper busbar 324, the electrical energy of the battery pack 3 can be output to an external load or input from an external power source. The size of the copper busbar 324 is selected according to actual needs, and this embodiment does not limit it.

[0113] Specifically, along the Y-axis, two fixing beams are spaced apart on the bottom wall of the housing 31, and the battery module 32 is snapped and fixed between the two fixing beams. By setting two fixing beams along the Y-axis on the bottom wall of the housing 31, the battery module 32 can be snapped and fixed inside the housing 31. The fixing beams provide a standardized installation position for the battery module 32, facilitating the quick positioning and fixing of the battery module 32 and simplifying the assembly process.

[0114] Specifically, the end plates 3221 at both ends of the battery module 32 along the Y-axis are fixedly connected to two fixed beams, so that the battery module 32 can be set more stably in the housing 31 and prevent the battery module 32 from shaking.

[0115] Optionally, the end plate 3221 is fixedly connected to the fixed beam by screws.

[0116] Specifically, in this embodiment, the housing 31 includes a side wall and a bottom wall, with the side wall surrounding the bottom wall to form the aforementioned accommodating cavity 311.

[0117] In one optional embodiment, both the sidewalls and the bottom wall are made of square extruded aluminum profiles, and adjacent sidewalls are welded together with each other and with the bottom wall. The square extruded aluminum profiles are formed by extrusion, and have a uniform cross-sectional structure and high bending and torsional strength, which can effectively withstand the weight of the battery module 32 and external impact forces. The welding connection method can ensure the rigidity and stability of the overall structure of the housing 31.

[0118] It should be noted that the cross-sectional shape and wall thickness of the square aluminum extrusion profile are confirmed according to the stress check. Under static load, the overall deformation of the box 31 must be less than 0.2mm, and the overall maximum stress must be less than 130MPa.

[0119] In one optional embodiment, the housing 31 is provided with multiple mounting slots, and the fire nozzles and the aforementioned connectors are installed in the corresponding mounting slots.

[0120] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A sodium-based commercial energy storage cabinet based on a phase change gravity heat pipe, characterized in that, include: The cabinet (1) and the support mechanism (2) are provided, wherein the cabinet (1) includes a battery compartment (11) and the support mechanism (2) is disposed in the battery compartment (11); Battery packs (3), a plurality of battery packs (3) are placed at intervals along the Z-axis on the support mechanism (2); The cooling mechanism (4) includes multiple cooling components (41) and multiple heat dissipation fins (42). Each battery pack (3) is provided with at least one cooling component (41). The cooling component (41) includes an evaporation chamber (411) and multiple phase change gravity heat pipes (412). The evaporation chamber (411) contains a phase change working fluid. The two ends of the phase change gravity heat pipes (412) are connected to the evaporation chamber (411). The phase change gravity heat pipes (412) extend to the left or right along the X-axis to one side of the support mechanism (2). The phase change gravity heat pipes (412) have a first pipe section (4121) and a second pipe section (4122) with a height difference along the Z-axis. At least one heat dissipation fin (42) is fitted on the outer wall of the multiple phase change gravity heat pipes (412) located on the same side of the support mechanism (2).

2. The sodium-based commercial energy storage cabinet for electrical applications based on a phase change gravity heat pipe according to claim 1, characterized in that, The multiple phase change gravity heat pipes (412) are divided into two groups of phase change gravity heat pipes. The two groups of phase change gravity heat pipes are distributed at intervals along the X-axis. The multiple phase change gravity heat pipes (412) located on the left side of the X-axis extend to the left along the X-axis to one side of the support mechanism (2), and the multiple phase change gravity heat pipes (412) located on the right side of the X-axis extend to the right along the X-axis to one side of the support mechanism (2).

3. The sodium-based commercial energy storage cabinet based on a phase change gravity heat pipe according to claim 1, characterized in that, The phase change gravity heat pipe (412) further includes a third pipe section (4123), a fourth pipe section (4124), and a fifth pipe section (4125). The third pipe section (4123) and the fourth pipe section (4124) both extend along the Z-axis, and the lengths of the third pipe section (4123) and the fourth pipe section (4124) are different. One end of the third pipe section (4123) is connected to the evaporation chamber (411), and the other end of the third pipe section (4123) is connected to one end of the first pipe section (4121). The other end of the first pipe section (4121) has a first bidirectional cutoff. The valve, one end of the fourth pipe section (4124) is connected to the evaporation chamber (411), the other end of the fourth pipe section (4124) is connected to one end of the second pipe section (4122), the other end of the second pipe section (4122) has a second bidirectional shut-off valve, the fifth pipe section (4125) has a U-shaped structure, a plurality of heat dissipation fins (42) are sleeved on the outer wall of the fifth pipe section (4125), and the two ends of the fifth pipe section (4125) are respectively connected to the first bidirectional shut-off valve and the second bidirectional shut-off valve, so that the phase change gravity heat pipe (412) is connected into a loop.

4. The sodium-based commercial energy storage cabinet for electrical applications based on a phase change gravity heat pipe according to claim 1, characterized in that, The cabinet (1) is provided with a number of fans on one side along the Y-axis, and the number of fans are all facing the number of heat dissipation fins (42). The cabinet (1) is provided with louvers on the other side along the Y-axis, and the louvers are used for ventilation.

5. The sodium-based commercial energy storage cabinet based on a phase change gravity heat pipe according to claim 1, characterized in that, The inner and / or outer walls of the cabinet (1) are provided with a first heat insulation element.

6. The sodium-based commercial energy storage cabinet based on a phase change gravity heat pipe according to claim 1, characterized in that, The support mechanism (2) includes: Two support assemblies (21) are spaced apart along the X-axis. The support assembly (21) has a clearance space that runs through the X-axis. The phase change gravity heat pipe (412) can extend to one side of the support mechanism (2) through the clearance space. Multiple support components (22) are distributed at intervals along the Z-axis. The two ends of the support components (22) are respectively connected to two bracket components (21), and the battery pack (3) is placed on the support components (22).

7. The sodium-based commercial energy storage cabinet for electrical applications based on a phase change gravity heat pipe according to any one of claims 1-6, characterized in that, The battery pack (3) also includes: The box (31) has a receiving cavity (311) and the top of the box (31) has an opening; The battery module (32) is fixedly housed in the accommodating cavity (311), and the cooling component (41) is sealed over the opening and abuts against the battery module (32).

8. The sodium-based commercial energy storage cabinet based on a phase change gravity heat pipe according to claim 7, characterized in that, A heat-conducting component is sandwiched between the cooling component (41) and the battery module (32).

9. The sodium-based commercial energy storage cabinet based on a phase change gravity heat pipe according to claim 7, characterized in that, The battery module (32) includes: The battery cell assembly (321) includes a plurality of battery cells (3211), which are stacked along the Y-axis, and a second heat insulation member (3212) is sandwiched between two adjacent battery cells (3211). The fixing assembly (322) includes two end plates (3221) and multiple connectors (3222). The two end plates (3221) are disposed on both sides of the battery cell assembly (321) along the Y-axis. The two ends of the connectors (3222) are respectively fixed to the two end plates (3221) so that the fixing assembly (322) clamps and fixes the battery cell assembly (321).

10. The sodium-based commercial energy storage cabinet based on a phase change gravity heat pipe according to claim 9, characterized in that, The battery cell (3211) has a positive electrode (32111) and a negative electrode (32112) respectively disposed at both ends along the X-axis, and the positive electrode (32111) and the negative electrode (32112) of two adjacent battery cells (3211) are arranged in opposite directions. The battery module (32) also includes an aluminum bus assembly (323), and two aluminum bus assemblies (323) are respectively disposed at both ends of the battery cell assembly (321) along the X-axis. The aluminum bus assembly (323) includes: Multiple aluminum bars (3231) are connected to the positive electrode (32111) and the negative electrode (32112) of two adjacent cells (3211); The first insulating element (3232) is disposed between two adjacent aluminum bars (3231).

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