Power cabinets and energy storage systems

Abstract

This application discloses a power cabinet and energy storage system, relating to the field of energy storage technology. In this power cabinet, each first air inlet corresponds to a first fan, ensuring sufficient airflow. The shared air cavity allows for more concentrated airflow through at least two converter components, improving heat dissipation efficiency. The first air outlet on the bottom surface, combined with the airflow direction, further optimizes the heat dissipation path, ensuring efficient airflow to remove heat generated by the converter components, thus effectively solving the problem of insufficient heat dissipation efficiency in dual-power-flow heat dissipation structures. Furthermore, the shared air cavity by multiple first fans simplifies the air-cooled structure, reduces the space occupied by the heat dissipation components within the cabinet, and makes the cabinet layout more compact, further reducing space requirements.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a power cabinet and energy storage system. Background Technology

[0002] In the field of energy storage, power conversion systems (PCS) control the charging and discharging processes of batteries, performing AC-DC conversion. Currently, the heat dissipation structures used in dual-power-flow energy storage converters have insufficient heat dissipation efficiency. Utility Model Content

[0003] This application provides a power cabinet to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a power cabinet is provided, comprising:

[0005] The cabinet is provided with at least two first air inlets and a first air outlet on the bottom surface of the cabinet.

[0006] At least two primary wind turbines;

[0007] The air cavity is provided with at least two first fans, and each first air inlet is equipped with one first fan.

[0008] At least two converter components are disposed at the bottom of the air cavity;

[0009] At least two of the first fans drive air to flow from at least two of the first air inlets through the air cavity and at least two of the flow conversion components to the first air outlet, so as to form an external circulation air duct.

[0010] In some embodiments, the first air inlet is located on the side of the cabinet.

[0011] In some embodiments, the power cabinet further includes:

[0012] At least two air deflectors are provided, each of which is disposed outside a first air inlet. The air deflector has an air inlet channel that extends at least partially along the height direction of the cabinet. The bottom surface of the air deflector in the height direction is provided with a second air inlet. The air inlet channel connects the first air inlet and the second air inlet.

[0013] In some embodiments, the power cabinet further includes:

[0014] A deflector is provided on the outside of at least two first air inlets. The deflector has an air inlet channel that extends at least partially along the height direction of the cabinet. A second air inlet is provided on the bottom surface of the deflector in the height direction. A partition is provided inside the deflector. The partition divides the air inlet channel into at least two sub-channels that connect to the second air inlet, and each sub-channel is connected to one of the first air inlets.

[0015] In some embodiments, in the height direction, the extension dimension of the air inlet channel from the second air inlet to the first air inlet is D, satisfying: H / 3≤D≤2H / 3, wherein the height of the cabinet is H.

[0016] In some embodiments, the first fan is disposed at the top of the air cavity.

[0017] In some embodiments, the power cabinet further includes at least two reactor components, which are located between at least two converter components and the first air outlet.

[0018] In some embodiments, the cabinet body also has an internal circulation cavity;

[0019] The power cabinet also includes:

[0020] A second fan is provided in the inner circulation chamber. The second fan is configured to drive air to circulate within the inner circulation chamber to form an inner circulation duct.

[0021] Electronic components are located in the internal circulation air duct.

[0022] In some embodiments, the power cabinet further includes a heat exchanger disposed in the inner circulation chamber and configured to exchange heat with air within the inner circulation duct.

[0023] In some embodiments, the power cabinet further includes a third fan, the heat exchanger has an internal circulation path and an external circulation path, the internal circulation path is used for air circulation in the internal circulation duct, the cabinet is provided with a third air inlet and a second air outlet communicating with the external circulation path, and the third fan is configured to drive external air from the third air inlet along the external circulation path to the second air outlet, so as to exchange heat between the air in the internal circulation path and the air in the external circulation path.

[0024] In some embodiments, in the height direction of the cabinet, the third air inlet is located below the second air outlet.

[0025] In some embodiments, the side of the cabinet includes a first side and a second side arranged opposite to each other, the first air inlet is located on the first side, and the third air inlet and the second air outlet are located on the second side.

[0026] According to a second aspect of this application, an energy storage system is provided, including a power cabinet of any of the above embodiments.

[0027] Beneficial Effects: The power cabinet in this embodiment includes: a cabinet with at least two first air inlets and a first air outlet on the bottom surface; at least two first fans; an air cavity with at least two first fans disposed therein, and one first fan configured for each first air inlet; and at least two converter components disposed at the bottom of the air cavity. The at least two first fans drive air from the at least two first air inlets through the air cavity and the at least two converter components to the first air outlet, forming an external circulation air duct. In this power cabinet, the configuration of one first fan for each first air inlet ensures sufficient airflow, and the shared air cavity allows the airflow to be more concentrated through the at least two converter components, improving the heat dissipation efficiency of the converter components. The first air outlet on the bottom surface, combined with the air duct flow direction, further optimizes the heat dissipation path, ensuring that the airflow efficiently removes the heat generated by the converter components, thereby effectively solving the problem of insufficient heat dissipation efficiency in dual-power-flow heat dissipation structures. In addition, multiple primary fans share a common air cavity, which simplifies the air-cooling structure, reduces the space occupied by the heat dissipation components inside the cabinet, and makes the cabinet layout more compact, thus reducing space usage.

[0028] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0031] Figure 1 This is a schematic diagram of the power cabinet provided in an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the external circulation air duct provided in the embodiments of this application;

[0033] Figure 3This is a schematic diagram of the bottom structure of a power cabinet provided in an embodiment of this application;

[0034] Figure 4 This is another structural schematic diagram of the bottom of the power cabinet provided in the embodiment of this application;

[0035] Figure 5 This is a structural schematic diagram of the power cabinet provided in an embodiment of this application from another perspective;

[0036] Figure 6 This is a schematic diagram of the internal circulation duct, internal circulation flow path and external circulation flow path provided in the embodiments of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Cabinet body; 10-Air cavity; 100-External circulation air duct; 11-First air inlet; 12-First air outlet; 13-Internal circulation cavity; 130-Internal circulation air duct; 14-Third air inlet; 15-Second air outlet; 16-First side; 17-Second side; 18-Cable routing port; 19-Support legs;

[0039] 2-First fan;

[0040] 3-Converter assembly; 9-Reactor assembly;

[0041] 4-Airflow deflector; 40-Air inlet channel; 41-Second air inlet; 42-Filter screen; 43-Baffle plate

[0042] 5-Second fan;

[0043] 6-Electronic components;

[0044] 7-Heat exchange assembly; 70-Heat exchanger; 700-Internal circulation path; 701-External circulation path; 71-Third fan;

[0045] 8-Auxiliary fan;

[0046] X-height direction. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0048] As the energy storage capacity and power of energy storage systems increase, the requirements for heat dissipation in the cabinets integrating various components also become more stringent. Cabinets often employ forced air cooling to dissipate heat from the components. To improve cooling efficiency, fan power or the number of fans is typically increased, which undoubtedly generates significant noise from the external environment. Furthermore, with increased fan power and number of fans, the increased airflow into the cabinet also increases the amount of moisture entering the cabinet, which can easily adversely affect the components inside.

[0049] In particular, there is currently no good solution for how to more effectively dissipate heat from dual-power-flow energy storage converters.

[0050] In view of the above, embodiments of this application provide a power cabinet and an energy storage system to overcome at least one of the above-mentioned technical problems.

[0051] It should be noted that in the following embodiments of this application, a height direction X is introduced, which is approximately parallel to the height direction X of the power cabinet.

[0052] Please refer to Figure 1 and Figure 2 The power cabinet includes a cabinet body 1, at least two first fans 2, a wind cavity 10, and at least two converter components 3.

[0053] The cabinet 1 serves as the main frame supporting all components, and it is equipped with at least two first air inlets 11 for introducing external air. Please refer to... Figure 3 As shown, the bottom surface of the cabinet 1 is provided with a first air outlet 12, which serves as a channel for airflow discharge. The cabinet 1 contains an air chamber 10, which is a space for airflow convergence and circulation. At least two first fans 2 are installed inside, and each first air inlet 11 is correspondingly equipped with one first fan 2. That is, the air entering from each first air inlet 11 is directly driven into the air chamber 10 by the corresponding first fan 2.

[0054] At least two power conversion components 3, as core components for power conversion, are located at the bottom of the air cavity 10, in the critical path of airflow. When the first fan 2 is working, external air enters the cabinet 1 through at least two first air inlets 11, and converges into the air cavity 10 under the drive of the corresponding first fan 2, forming a concentrated airflow. Subsequently, the airflow flows downward from the air cavity 10, passes through at least two power conversion components 3 at the bottom, and exchanges heat with the power conversion components 3 to remove the heat generated by their operation. Finally, the airflow is discharged from the cabinet 1 through the first air outlet 12 on the bottom surface of the cabinet 1, thereby forming a complete external circulation air duct 100.

[0055] In this embodiment, each first air inlet 11 corresponds to one first fan 2, ensuring sufficient air intake and avoiding insufficient airflow caused by excessive load on a single fan. The shared air cavity 10 can converge the airflow driven by multiple first fans 2, forming a concentrated and stable airflow, allowing the airflow to flow more evenly through at least two converter components 3. Compared to the dispersed airflow of independent air cavities 10, this arrangement allows more cold air to directly contact the converter components 3, improving heat exchange efficiency and effectively enhancing the heat dissipation efficiency of the dual-power flow structure.

[0056] Furthermore, at least two first fans 2 share one air cavity 10, eliminating the need for an independent and isolated air cavity 10 for each converter component 3, which simplifies the overall structure of air cooling to a certain extent. At the same time, the converter components 3 are centrally arranged at the bottom of the air cavity 10, reducing the space waste caused by the dispersed layout and making the internal layout of the cabinet 1 more compact.

[0057] Under the premise of sharing the frame of cabinet 1, it can not only meet the independent power conversion function of at least two power conversion components 3, but also achieve coordinated heat dissipation through a unified external circulation air duct 100, thus avoiding the problems of structural redundancy and heat dissipation conflict in dual power flow scenarios.

[0058] Optionally, the air cavity 10 can be an integral cavity structure, that is, an integral cavity formed by using a surrounding plate; or, the air cavity 10 can also be made into at least two connected cavity structures, that is, at least two surrounding plates are used to form cavities respectively, and after being assembled together, they are interconnected through the opening structure in the middle.

[0059] Optionally, the first fan 2 can be located at the top of the air cavity 10, or it can be located inside or at the bottom of the air cavity 10. When the first fan 2 is located at the top of the air cavity 10, it is closer to the first air inlet 11, which can shorten the air intake path, reduce the resistance of airflow entering the air cavity 10, and quickly gather external air. When located inside the air cavity 10, it can flexibly adjust the distribution of airflow within the air cavity 10, so that the airflow covers the converter component 3 more evenly. When located at the bottom of the air cavity 10, it can directly drive the airflow to the converter component 3, enhance the direct interaction between the airflow and the heat-generating components, and improve heat exchange efficiency. All three setting methods can adapt to the requirements of the external circulation air duct 100 and ensure the heat dissipation effect.

[0060] Optionally, the first air inlet 11 can be located on the top surface of the cabinet 1, or the first air inlet 11 can be located on the side of the cabinet 1.

[0061] In some embodiments, at least two first air inlets 11 are disposed on the side of the cabinet 1. Specifically, the side of the cabinet 1 is a side facade distinct from the top and bottom surfaces, and at least two first air inlets 11 are distributed along predetermined positions on the side of the cabinet 1, for example... Figure 1The dashed box represents two first air inlets 11, which are arranged at intervals along the horizontal direction.

[0062] Compared to the top or bottom, the sides of cabinet 1 are more likely to avoid areas where hot air accumulates in the environment. The first air inlet 11 is located on the side, allowing for the introduction of relatively cooler outside air, thus improving heat exchange efficiency with the inverter component 3. Furthermore, placing the first air inlet 11 on the side maximizes space utilization, avoids conflicts with the bottom air outlet or other components on the top, and makes the overall layout of cabinet 1 more compact, further optimizing space utilization efficiency.

[0063] The first fan 2 is installed inside the air cavity 10 near the first air inlet 11 on the side, allowing outside air to enter directly from the first air inlet 11 on the side of the cabinet 1. After being driven by the corresponding first fan 2, the air flows into the air cavity 10, then through the flow converter 3 at the bottom of the air cavity 10, and finally exits from the first air outlet 12 on the bottom surface of the cabinet 1, forming an external circulation air duct 100. The first air inlet 11 on the side can introduce cooler outside air, while the first air outlet 12 on the bottom surface can accelerate the exhaust of hot air by utilizing the combined effect of gravity and airflow. At the same time, the flow converter 3 is located at the bottom of the air cavity 10, in the core heat exchange area downstream of the airflow, ensuring that the airflow contacts the heat-generating components at the stage of maximum energy, further improving the targeting and effectiveness of heat dissipation.

[0064] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 3 The power cabinet also includes at least two air intake shrouds 4, each air intake shroud 4 being positioned one-to-one over a first air inlet 11 on the side of the cabinet 1. An air intake channel 40 is formed inside the air intake shroud 4, and at least a portion of this channel extends along the height direction X of the cabinet 1. Simultaneously, a second air inlet 41 is provided on the bottom surface of the air intake shroud 4 in the height direction X. The air intake channel 40 connects the first air inlet 11 and the second air inlet 41, forming an airflow path in which external air enters the air intake channel 40 through the second air inlet 41 and then enters the interior of the cabinet 1 through the first air inlet 11.

[0065] Specifically, each air deflector 4 corresponds independently to a first air inlet 11. Its structure prevents external air from directly entering the first air inlet 11. Instead, it must first enter through the second air inlet 41 on the bottom surface of the air deflector 4, and then flow through the air inlet channel 40 that extends at least partially along the height direction X. Finally, it enters the cabinet 1 through the first air inlet 11 and connects with the external circulation air duct 100 to form a complete air inlet path.

[0066] During the operation of the first fan 2, external air from outside the cabinet 1 is introduced into the air intake channel 40 through the second air inlet 41, then enters the air chamber 10 through the first air inlet 11, flows through the external circulation air duct 100 and passes through the converter component 3 before being discharged through the first air outlet 12, thereby achieving air-cooled cooling of the converter component 3. It is understandable that, compared to directly introducing external air through the first air inlet 11, during the air intake channel 40 process, moisture can adhere to the inner wall of the guide shroud 4, significantly reducing the amount of moisture entering the cabinet 1, lowering the risk of failure of core components such as the converter component 3 due to moisture, and making it particularly suitable for energy storage systems in humid environments.

[0067] At least a portion of the air inlet channel 40 extends along the height direction X, providing a buffer path for the airflow. This allows the airflow to gradually stabilize its velocity and reduce turbulence within the channel after entering through the second air inlet 41, before smoothly entering the first air inlet 11, thereby reducing wind noise during the air intake process. Simultaneously, the second air inlet 41 is located on the bottom surface of the air guide shroud 4, and its orientation forms an angle difference with the first air inlet 11 on the side of the cabinet 1, reducing the direct diffusion of noise into the external environment. Similarly, the first air outlet 12 is also oriented towards the bottom surface of the cabinet 1, further reducing the diffusion of wind noise generated at the second air inlet 41 and the first air outlet 12, thus reducing the noise impact of the power cabinet on the external environment.

[0068] It should be noted that, referring to Figure 2 The dashed line and arrow indicate the flow direction of the external circulation duct 100.

[0069] In some embodiments, refer to Figure 3 In order to further reduce the amount of moisture and impurities from the outside air entering the air cavity 10, a filter screen 42 is also provided inside the air guide shroud 4. Multiple layers of filter screen 42 can be set along the air inlet channel 40. The type of filter screen 42 can be flexibly adjusted as needed, which will not be described in detail here.

[0070] In other embodiments, please refer to Figure 4 The power cabinet includes an air intake shroud 4, which is an integral structure. The shroud is installed on the outside of at least two first air inlets 11 on the side of the cabinet body 1, forming a unified air intake pretreatment structure. The air intake shroud 4 has an air intake channel 40 extending at least partially along the height direction X of the cabinet body 1, and the bottom surface of the air intake shroud 4 has a second air inlet 41 in the height direction X. At the same time, the air intake shroud 4 has a partition 43 inside, which divides the air intake channel 40 into at least two independent sub-channels. One end of each sub-channel is connected to the second air inlet 41, and the other end is connected to a corresponding first air inlet 11, thereby forming an airflow path in which external air enters the sub-channel through the second air inlet 41, and then enters the interior of the cabinet body 1 through the first air inlet 11.

[0071] Specifically, a single air guide hood 4 integrates and covers multiple first air inlets 11. The airflow is divided by the internal partition 43. After the external air enters from the second air inlet 41 on the bottom surface of the air guide hood 4, it is guided by the partition 43 to different sub-channels. Each sub-channel corresponds to a first air inlet 11, ensuring that the airflow enters each first air inlet 11 on the side of the cabinet 1 and connects with the external circulation air duct 100 to complete the air intake process.

[0072] In this embodiment, a single air deflector 4 is used to integrate and cover at least two first air inlets 11, reducing the number of air deflectors 4 and the redundancy of components on the side of the cabinet 1. This simplifies the external structure of the cabinet 1, reduces raw material consumption and manufacturing costs, and also reduces installation steps and improves assembly efficiency.

[0073] Please refer to this again. Figure 2 In order to improve the air outlet 12, the power cabinet also includes multiple support legs 19, which are distributed circumferentially on the bottom surface of the cabinet 1, thereby supporting the cabinet 1 and creating a gap between the first air outlet 12 and the ground.

[0074] In addition, refer to Figure 3 and Figure 4 The bottom surface of cabinet 1 is also provided with a wiring port 18 for wiring inside cabinet 1, which will not be described in detail here.

[0075] In some embodiments, refer to Figure 2 In the vertical direction X, the first air inlet 11 is located at the top of the guide shroud 4, and the second air inlet 41 is located at the bottom of the guide shroud 4. The height of the cabinet 1 is H, and the extension dimension of the air inlet channel 40 from the second air inlet 41 to the first air inlet 11 is D, satisfying: H / 3≤D≤2H / 3. It can be understood that, on the one hand, in order to avoid the hot air discharged from the first air outlet 12 affecting the second air inlet 41, D≤2H / 3 is set, thereby reducing the possibility of the second air inlet 41 drawing the hot air discharged from the first air outlet 12. On the other hand, setting H / 3≤D is beneficial to ensure that the formed air inlet channel 40 can fully absorb water vapor on the inner wall of the guide shroud 4 and reduce wind noise, reduce the entry of external water vapor into the air cavity 10, and improve the protection of the converter component 3.

[0076] In some embodiments, refer to Figure 2 The power cabinet also includes at least two reactor components 9, and the installation positions of the at least two reactor components 9 are located between the at least two converter components 3 and the first air outlet 12 on the bottom surface of the cabinet 1. Specifically, the reactor components 9 are located downstream of the external circulation duct 100, that is, external air enters the air cavity 10 through the first air inlet 11, flows through the converter components 3, and then continues to flow through these reactor components 9, and finally exits the cabinet 1 through the first air outlet 12.

[0077] Reactor assembly 9 and converter assembly 3 share the same external circulation air duct 100, eliminating the need for a separate independent heat dissipation structure for reactor assembly 9. This reduces redundancy in heat dissipation components within cabinet 1, resulting in a more compact overall structure and further minimizing the space occupied within cabinet 1. The airflow retains some cooling capacity after cooling converter assembly 3, and continues to carry away heat generated by reactor assembly 9 during operation. This fully utilizes the airflow energy of the external circulation air duct 100, avoiding waste of cooling resources. Simultaneously, it ensures that both converter assembly 3 and reactor assembly 9, the two core heat-generating components, receive effective heat dissipation, improving the overall heat dissipation efficiency of the power cabinet.

[0078] In addition, since the reactor component 9 is usually heavy, placing it below the converter component 3 and close to the bottom of the cabinet 1 can lower the overall center of gravity of the power cabinet, reduce the risk of the cabinet 1 tipping over due to external vibration and impact, and significantly improve the structural stability of the power cabinet operation.

[0079] In some embodiments, refer to Figure 5 and Figure 6 The cabinet 1 also includes an internal circulation chamber 13, which is separated from the air chamber 10. The power cabinet also includes a second fan 5 and electronic components 6. The second fan 5 is located in the internal circulation chamber 13 and is configured to drive air to circulate within the internal circulation chamber 13, forming an internal circulation duct 130. The electronic components 6 are located in the internal circulation duct 130, within the airflow path, and are cooled by the internal circulation airflow.

[0080] Reference Figure 5 and Figure 6 The dashed line and arrow indicate the flow direction of the internal circulation duct 130. The internal circulation duct 130 is a closed loop, and the air does not exchange with the external environment. This can prevent moisture and impurities that may be brought in by the external circulation duct 100 from entering the internal circulation cavity 13, reducing the risk of failure of electronic components 6 due to moisture and dust accumulation. It is especially suitable for electronic components that are highly sensitive to the environment.

[0081] Electronic component 6 can be all devices in the power cabinet except for converter component 3 and reactor component 9. In this embodiment, the heat generated by electronic component 6 per unit time is less than the heat generated by converter component 3. Therefore, there is no need to rely on external circulation for strong air cooling. The internal circulation duct 130 drives the internal air circulation through the second fan 5, which can meet the heat dissipation requirements, avoid resource waste, and improve the targeted heat dissipation.

[0082] In addition, refer to Figure 5 and Figure 6 The power cabinet also includes an auxiliary fan 8, which can be flexibly arranged in the inner circulation chamber 13 according to the flow direction of the inner circulation channel, thereby assisting the second fan 5 in forming the inner circulation channel. The number of auxiliary fans 8 can also be flexibly increased or decreased as needed, which will not be elaborated here.

[0083] In some embodiments, refer to Figure 5 and Figure 6 The power cabinet also includes a heat exchange assembly 7, which includes a heat exchanger 70. The heat exchanger 70 is located in the inner circulation chamber 13 and is situated in the airflow path of the inner circulation duct 130. The heat exchanger 70 is configured to provide heat exchange for the air within the inner circulation duct 130. Specifically, when the second fan 5 drives the air in the inner circulation chamber 13 to form the inner circulation duct 130, the airflow passes through the electronic component 6, carrying away its heat. The air then flows through the heat exchanger 70, where it exchanges heat with the air, cooling it before recirculating it to the electronic component 6, thus achieving continuous cooling of the electronic component 6.

[0084] In some embodiments, refer to Figure 4 and Figure 5 It also includes a third fan 71. The heat exchanger 70 has an inner circulation path 700 and an outer circulation path 701. The inner circulation path 700 is used for air circulation in the inner circulation duct 130. The cabinet 1 is provided with a third air inlet 14 and a second air outlet 15 that connect to the outer circulation path 701. The third fan 71 is configured to drive external air from the third air inlet 14 along the outer circulation path 701 to the second air inlet 41, so that the air in the inner circulation path 700 and the air in the outer circulation path 701 can exchange heat. During the operation of the second fan 5 and the third fan 71, the air in the inner circulation chamber 13 enters the inner circulation path 700, while the external air enters the outer circulation path 701 from the third air inlet 14, thereby realizing heat exchange with the heat exchanger 70 as a medium. This is beneficial for cooling the air in the inner circulation chamber 13 and improving the protection of the electronic components 6. The external air after heat exchange is discharged from the second air outlet 15.

[0085] In this embodiment, the third fan 71 actively drives the external air to flow along the external circulation path 701, accelerating the air renewal of the external circulation path 701 and enhancing the heat exchange intensity with the air in the internal circulation path 700. Even if the electronic component 6 generates slightly more heat, the heat in the internal circulation air can be quickly removed through efficient heat exchange, avoiding the accumulation of internal circulation air temperature and significantly improving the heat dissipation capacity of the electronic component 6.

[0086] The internal circulation path 700 and the external circulation path 701 exchange heat indirectly through the heat exchanger 70. The airflows of the two do not come into direct contact. The internal circulation cavity 13 remains closed, which can effectively prevent water vapor, dust and other impurities in the external environment from entering, thus continuing to protect the electronic components 6 and avoiding faults such as short circuits and corrosion caused by external pollutants.

[0087] In some embodiments, refer to Figure 6In the vertical direction X, the third air inlet 14 is located below the second air outlet 15. By placing the third air inlet 14 below the second air outlet 15, it is beneficial to reduce the impact of the hot air discharged from the second air outlet 15 on the air intake of the third air inlet 14 and the second air inlet 41, thereby reducing the problem of heat backflow in the power cabinet.

[0088] Specifically, hot air has the characteristic of rising naturally. The air discharged from the second air outlet 15 is at a higher temperature after heat exchange and will diffuse upwards. Meanwhile, the third air inlet 14 is located at the bottom and can draw in cooler ambient air (cold air is denser and tends to accumulate at the bottom). This vertical distribution reduces the phenomenon of hot air discharged from the second air outlet 15 being directly drawn in by the third air inlet 14, thereby improving the heat exchange efficiency of the heat exchanger 70.

[0089] In some embodiments, refer to Figure 6 The cabinet 1 has a first side 16 and a second side 17 arranged opposite to each other. A first air inlet 11 is located on the first side 16, and a third air inlet 14 and a second air outlet 15 are located on the second side 17. By arranging the first air inlet 11 and the second air outlet 15 on opposite sides of the cabinet 1, it is beneficial to further reduce the impact of the second air outlet 15 on the first air inlet 11, and further reduce the problem of heat backflow in the power cabinet.

[0090] The first air inlet 11 on the first side 16 is used to introduce external air into the external circulation duct 100, and the third air inlet 14 on the second side 17 introduces external air into the external circulation flow path 701 of the heat exchanger 70. The air after heat exchange is discharged from the second air outlet 15 on the same side, so that the air inlet path of the external circulation duct 100 and the air inlet and exhaust paths of the external circulation flow path 701 of the heat exchanger 70 are respectively distributed on opposite sides of the cabinet 1. This can significantly reduce the mutual influence between the air inlet of the external circulation duct 100 and the exhaust hot air of the external circulation flow path 701 of the heat exchanger 70.

[0091] This application provides an energy storage system, including the aforementioned power cabinet. It is understood that the energy storage system can possess all the technical features and effects of the aforementioned power cabinet, which will not be elaborated upon here.

[0092] In the description of this application, 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0093] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0094] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0095] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A power cabinet characterized by, include: Cabinet (1), the cabinet (1) is provided with at least two first air inlets (11), and the bottom surface of the cabinet (1) is provided with a first air outlet (12); At least two primary wind turbines (2); An air cavity (10) is provided, at least two first fans (2) are provided in the air cavity (10), and each first air inlet (11) is provided with one first fan (2); At least two converter components (3) are disposed at the bottom of the air cavity (10); At least two of the first fans (2) drive air from at least two of the first air inlets (11) through the air cavity (10) and at least two of the flow converters (3) to the first air outlet (12) to form an external circulation duct (100).

2. The power cabinet of claim 1, wherein, The first air inlet (11) is located on the side of the cabinet (1).

3. The power cabinet of claim 2, wherein, The power cabinet also includes: At least two air deflectors (4) are provided, each of which covers the outside of a first air inlet (11). The air deflector (4) has an air inlet channel (40) extending at least partially along the height direction (X) of the cabinet (1). The air deflector (4) has a second air inlet (41) on its bottom surface in the height direction (X). The air inlet channel (40) connects the first air inlet (11) and the second air inlet (41).

4. The power cabinet of claim 2, wherein, The power cabinet also includes: A deflector (4) is provided on the outside of at least two first air inlets (11). The deflector (4) has an air inlet channel (40) extending at least partially along the height direction (X) of the cabinet (1). The deflector (4) has a second air inlet (41) on its bottom surface in the height direction (X). A partition (43) is provided inside the deflector (4). The partition (43) divides the air inlet channel (40) into at least two sub-channels that connect to the second air inlet (41), and each sub-channel is connected to one first air inlet (11).

5. The power cabinet according to claim 3 or 4, characterized in that, In the height direction (X), the extension dimension of the air inlet channel (40) from the second air inlet (41) to the first air inlet (11) is D, which satisfies: H / 3≤D≤2H / 3, wherein the height of the cabinet (1) is H.

6. The power cabinet according to claim 1, characterized in that, The first fan (2) is located at the top of the air cavity (10).

7. The power cabinet according to claim 1, characterized in that, The power cabinet also includes at least two reactor components (9), which are located between at least two converter components (3) and the first air outlet (12).

8. The power cabinet according to claim 1, characterized in that, The cabinet (1) also has an internal circulation cavity (13); The power cabinet also includes: A second fan (5) is provided in the inner circulation chamber (13). The second fan (5) is configured to drive air to circulate within the inner circulation chamber (13) to form an inner circulation duct (130). Electronic component (6) is located in the internal circulation air duct (130).

9. The power cabinet according to claim 8, characterized in that, The power cabinet also includes a heat exchanger (70) disposed in the inner circulation chamber (13) and configured to exchange heat with the air in the inner circulation duct (130).

10. The power cabinet according to claim 9, characterized in that, The power cabinet also includes a third fan (71). The heat exchanger (70) has an inner circulation path (700) and an outer circulation path (701). The inner circulation path (700) is used to circulate the air in the inner circulation duct (130). The cabinet (1) is provided with a third air inlet (14) and a second air outlet (15) that connects to the outer circulation path (701). The third fan (71) is configured to drive external air from the third air inlet (14) along the outer circulation path (701) to the second air outlet (15) so that the air in the inner circulation path (700) and the air in the outer circulation path (701) can exchange heat.

11. The power cabinet according to claim 10, characterized in that, In the height direction (X) of the cabinet (1), the third air inlet (14) is located below the second air outlet (15).

12. The power cabinet according to claim 10, characterized in that, The cabinet (1) has a first side (16) and a second side (17) arranged opposite to each other. The first air inlet (11) is located on the first side (16), and the third air inlet (14) and the second air outlet (15) are located on the second side (17).

13. An energy storage system characterized by, Includes the power cabinet as described in any one of claims 1 to 12.

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