Converter and energy storage device

Abstract

The application relates to a converter and an energy storage device, wherein the converter comprises a cabinet body which encloses a containing cavity; a conversion assembly which is arranged in the containing cavity and comprises a first assembly and a second assembly, the heat dissipation intensity of the first assembly being greater than that of the second assembly; a first heat dissipation assembly which is arranged in the cabinet body and comprises a first power source, a first partition, a first radiator and a second radiator, the first partition and the cabinet body enclosing a first outer circulation channel, the first power source being capable of driving gas outside the cabinet body to enter the first outer circulation channel and exchange heat with the heat dissipation end and the second radiator and then be discharged outside the cabinet body; and a second heat dissipation assembly which is arranged in the cabinet body and comprises a second power source, at least part of the first heat dissipation assembly, the cabinet body and the first assembly enclosing an inner circulation channel, the second power source being capable of driving gas in the inner circulation channel to circulate. The converter provided by the application can improve the heat dissipation effect and improve the reliability.

Description

Technical Field

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

[0002] With the development of energy storage technology, existing power energy storage devices can adopt various energy storage methods, such as pumped hydro storage, electrochemical energy storage, compressed air energy storage, and flywheel energy storage. These types of power devices often require converters, which typically need to operate for extended periods or under high current, placing high demands on heat dissipation efficiency. Existing converters have numerous internal components and inadequate heat dissipation design, resulting in a large cross-sectional area of ​​the busbar, leading to increased material usage and cost. Furthermore, this results in inadequate heat dissipation for various electronic components, increasing the failure rate and ultimately reducing the overall reliability of the converter.

[0003] Therefore, there is an urgent need for a converter that can improve heat dissipation and reliability, as well as corresponding energy storage devices. Utility Model Content

[0004] This application provides a converter and an energy storage device, which can improve heat dissipation efficiency and reliability.

[0005] In a first aspect, an embodiment of this application provides a converter, comprising: a cabinet enclosing a receiving cavity; a converter assembly disposed within the receiving cavity, the converter assembly including a first assembly and a second assembly, the heat dissipation intensity of the first assembly being greater than that of the second assembly; a first heat dissipation assembly disposed within the cabinet, the first heat dissipation assembly including a first power source, a first partition, a first radiator, and a second radiator, the first partition and the cabinet enclosing a first external circulation channel, the first radiator having a heat absorption end and a heat dissipation end, the second radiator and at least a portion of the heat dissipation end being disposed within the first external circulation channel, the second... The radiator and the heat-absorbing end are used to absorb at least part of the heat of the first component. The first power source can drive the gas outside the cabinet to enter the first external circulation channel and exchange heat with the heat dissipation end and the second radiator before being discharged outside the cabinet. The second heat dissipation component is disposed in the cabinet and includes a second power source. The first heat dissipation component, the cabinet and at least a part of the first component enclose an inner circulation channel. The heat-absorbing end extends at least partially into the inner circulation channel. The second power source can drive the gas in the inner circulation channel to circulate so as to absorb at least part of the heat of the first component and the second component and transfer it to the heat-absorbing end.

[0006] According to one aspect of the embodiments of this application, the first heat dissipation component further includes a second partition and a third power source. The second partition and the cabinet enclose a second external circulation channel. A portion of the first component is disposed in the second external circulation channel. The third power source can drive the gas outside the cabinet to enter the second external circulation channel and exchange heat with a portion of the first component before being discharged outside the cabinet.

[0007] According to one aspect of the embodiments of this application, the receiving cavity includes a top cavity, a main cavity, and a bottom cavity arranged sequentially along a first direction. A first power source is disposed in the top cavity, a first partition is disposed in the main cavity, a first external circulation channel is connected to the top cavity, and a first vent is provided on the side wall of the top cavity; a second external circulation channel is connected to the bottom cavity, and a second vent is provided on the side wall of the bottom cavity.

[0008] According to one aspect of the embodiments of this application, the cavity wall of the main cavity is provided with a third ventilation opening, and the two ends of the first external circulation channel are respectively connected to the first ventilation opening and the third ventilation opening; along the first direction, the orthographic projection of the third ventilation opening is offset from the orthographic projection of the first ventilation opening.

[0009] According to one aspect of the embodiments of this application, the cabinet includes a plurality of side walls, one of which is provided with a third ventilation opening, and the remaining side walls are provided with a first ventilation opening.

[0010] According to one aspect of the embodiments of this application, the cavity wall of the main cavity is further provided with a fourth ventilation opening, and the two ends of the second external circulation channel are respectively connected to the second ventilation opening and the fourth ventilation opening, and the fourth ventilation opening is arranged opposite to the second power source; the cabinet includes multiple side walls, and each side wall is provided with a second ventilation opening.

[0011] According to one aspect of the embodiments of this application, the first component includes a first sub-component and a second sub-component. The first sub-component is connected to the heat absorption end and the second heat sink, and the second sub-component is disposed in the second external circulation channel. The first sub-component, the cabinet, the first partition and the second partition together enclose an internal circulation channel, and both the first sub-component and the second component are at least partially located in the internal circulation channel.

[0012] According to one aspect of the embodiments of this application, along a first direction, a first sub-component is disposed between a first separator and a second sub-component and a second component; along a second direction, the second sub-component and the second component are correspondingly disposed; the first direction and the second direction intersect; along the first direction, the orthographic projection of the second power source is located on the side where the orthographic projection of the second component is opposite to the orthographic projection of the second separator.

[0013] According to one aspect of the embodiments of this application, the first sub-component includes a capacitor bank and a power component arranged along a second direction, the capacitor bank being connected to a heat-absorbing end and the power component being connected to a second heat sink; the second sub-component includes an AC reactor; the second component includes an AC circuit breaker, a DC switch, a DC fuse, a DC connection terminal, an AC connection terminal, and an AC filter capacitor.

[0014] According to one aspect of the embodiments of this application, the first component includes a plurality of power components spaced apart along a third direction, wherein the first direction, the second direction, and the third direction intersect each other; the first heat dissipation component includes a plurality of second heat sinks, which are arranged along a third direction and are connected to the plurality of power components one by one.

[0015] According to one aspect of the embodiments of this application, along a first direction, an AC circuit breaker and an AC connection terminal are arranged in sequence, a DC switch, a DC fuse and a DC connection terminal are arranged in sequence, and an AC filter capacitor is disposed on at least one side of the second separator in a third direction, with the first direction, the second direction and the third direction intersecting each other.

[0016] According to one aspect of the embodiments of this application, the second component includes a plurality of DC switches, a plurality of DC fuses, and a plurality of DC connection terminals, wherein the plurality of DC fuses are respectively disposed on opposite sides of the AC circuit breaker along a third direction.

[0017] According to one aspect of the embodiments of this application, the first heat dissipation component includes a plurality of first power sources and a plurality of third power sources, and the second heat dissipation component includes a plurality of second power sources; the plurality of first power sources, the plurality of second power sources, and the plurality of third power sources are arranged sequentially along a third direction.

[0018] According to one aspect of the embodiments of this application, the first power source, the second power source, and the third power source are all centrifugal fans.

[0019] Secondly, according to embodiments of this application, an energy storage device is proposed, including the converter in any embodiment of the first aspect.

[0020] This application provides a converter, including a cabinet, a converter component, a first heat dissipation component, and a second heat dissipation component. The cabinet encloses a cavity to provide support and protection for the other three components. The converter component performs the function of the converter. The first heat dissipation component forms a first external circulation channel within the cabinet, cooling the internal structure of the cabinet with external cold air. The second heat dissipation component forms an internal circulation channel within the cabinet, and heat exchange occurs between the internal and external circulation channels through a first radiator in the first heat dissipation component. The cold air in the first external circulation channel also dissipates heat from the components passing through the internal circulation channel. Therefore, it can selectively perform external circulation heat dissipation for components with high heat generation, and internal circulation heat dissipation for components with low heat generation or high requirements for the working environment. Its structure is simple and can effectively improve heat dissipation efficiency. Attached Figure Description

[0021] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0022] Figure 1 This is a front view structural diagram of a converter provided in one embodiment of this application;

[0023] Figure 2 This is a side view of a converter provided in one embodiment of this application;

[0024] Figure 3 This is a rear view structural diagram of a converter provided in one embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the gas circulation of a converter provided in one embodiment of this application;

[0026] Figure 5 This is a circuit diagram of a converter provided in one embodiment of this application.

[0027] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0028] 100-Converter;

[0029] 10 - Cabinet; 20 - Converter assembly; 30 - First heat dissipation assembly; 40 - Second heat dissipation assembly;

[0030] 11-Accommodation cavity; 12-Side wall; 21-First component; 22-Second component; 31-First power source; 32-First partition; 33-First radiator; 34-Second radiator; 35-First external circulation channel; 36-Second partition; 37-Third power source; 38-Second external circulation channel; 41-Second power source; 42-Internal circulation channel;

[0031] 111-Top cavity; 112-Main cavity; 113-Bottom cavity; 211-First sub-assembly; 212-Second sub-assembly; 221-AC circuit breaker; 222-DC switch; 223-DC fuse; 224-DC connection terminal; 225-AC connection terminal; 226-AC filter capacitor; 331-Heat absorption end; 332-Heat dissipation end;

[0032] 1111 - First ventilation opening; 1121 - Third ventilation opening; 1122 - Fourth ventilation opening; 1131 - Second ventilation opening; 2111 - Capacitor cell; 2112 - Power assembly; 2121 - AC reactor;

[0033] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0034] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0035] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the molding die and molding method of this application. It should also be noted that, unless otherwise explicitly specified and limited, "multiple" means two or more, and the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. The terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art will understand the specific meaning of these terms in this application based on the specific circumstances.

[0037] Electric energy storage equipment refers to equipment that stores electrical energy in a certain way and releases it when needed. The energy storage technologies used can include pumped hydro storage, electrochemical energy storage, compressed air energy storage, and flywheel energy storage. For energy storage equipment that uses electrochemical energy storage and other methods, a converter is usually required to realize the function of changing the voltage, frequency, number of phases, or other characteristics of the power system, such as DC-AC conversion.

[0038] Based on this, the applicant found that converters typically have cabinets or enclosures for housing electronic components. These enclosures contain a large number of components and are quite bulky, making it difficult to install heat dissipation structures. Heat dissipation structures located on the outer wall of the cabinet / enclosure are unable to effectively dissipate heat from the internal central area, leading to heat buildup in the internal components and an increase in the overall failure rate and a decrease in the reliability of the converter.

[0039] To address the aforementioned issues, this application provides a converter and an energy storage device, wherein by improving the heat dissipation structure, high-intensity heat dissipation can be applied to the parts with high heat generation, and internal circulation heat dissipation can be applied to the parts with high precision that are easily damaged by environmental changes, thereby effectively improving the heat dissipation effect and enhancing the reliability of the converter.

[0040] It is understood that the following embodiments of this application are only used as an example of applying the converter to energy storage devices. However, the converter provided in the embodiments of this application is not limited to the following embodiments. It can also be used in other occasions where the power system needs to be adjusted and protected.

[0041] To better understand this application, the following will be combined with... Figures 1 to 5 Provide a detailed description.

[0042] Please refer to the following: Figures 1 to 4 , Figure 1 This is a front view schematic diagram of a converter provided in one embodiment of this application. Figure 2 This is a side view of a converter according to one embodiment of this application. Figure 3 This is a rear view structural diagram of a converter provided in one embodiment of this application. Figure 4 This is a schematic diagram of the gas circulation of a converter provided in one embodiment of this application.

[0043] In a first aspect, according to an embodiment of this application, a converter 100 is provided, comprising: a cabinet 10 enclosing a receiving cavity 11; a converter assembly 20 disposed in the receiving cavity 11, the converter assembly 20 including a first assembly 21 and a second assembly 22, the heat dissipation intensity of the first assembly 21 being greater than that of the second assembly 22; and a first heat dissipation assembly 30 disposed in the cabinet 10, the first heat dissipation assembly 30 including a first power source 31, a first partition 32, a first radiator 33, and a second radiator 34, the first partition 32 and the cabinet 10 enclosing a first external circulation channel 35, the first radiator 33 having a heat absorption end 331 and a heat dissipation end 332, and the second radiator 34 and at least a portion of the heat dissipation end 332 being disposed in the first external circulation channel 35. The second radiator 34 and the heat-absorbing end 331 are used to absorb at least part of the heat of the first component 21. The first power source 31 can drive the gas outside the cabinet 10 to enter the first external circulation channel 35 and exchange heat with the heat dissipation end 332 and the second radiator 34 before being discharged outside the cabinet 10. The second heat dissipation component 40 is disposed in the cabinet 10. The second heat dissipation component 40 includes the second power source 41. The first heat dissipation component 30, the cabinet 10 and at least part of the first component 21 enclose to form an internal circulation channel 42. The heat-absorbing end 331 extends at least partially into the internal circulation channel 42. The second power source 41 can drive the gas in the internal circulation channel 42 to circulate, so as to absorb at least part of the heat of the first component 21 and the second component 22 and transfer it to the heat-absorbing end 331.

[0044] This application provides a converter 100, including a cabinet 10, a converter component 20, a first heat dissipation component 30, and a second heat dissipation component 40. The cabinet 10 provides external housing, support, and protection. The cabinet 10 may be rectangular or nearly rectangular in shape to facilitate processing and assembly. The cabinet 10 may have a door on at least one side wall 12 to facilitate the installation of the converter component 20 and the heat dissipation component inside the cabinet 10. The cabinet 10 encloses a receiving cavity 11, in which the converter component 20, the first heat dissipation component 30, and the second heat dissipation component 40 are at least partially disposed.

[0045] The converter assembly 20 is housed within the cabinet 10 and is used to implement the electrical functions required by the converter 100. The converter assembly 20 can be divided into a first assembly 21 and a second assembly 22. The heat dissipation intensity of the first assembly 21 is greater than that of the second assembly 22. Therefore, when setting the specific structure of the converter assembly 20, the part with higher heat generation can be set as the first assembly 21, and the part with lower heat generation and higher requirements for the quality of the working environment can be set as the second assembly 22. By specifically cooling the components with different heat generation, the overall heat dissipation effect of the converter 100 can be effectively improved.

[0046] Both the first heat dissipation component 30 and the second heat dissipation component 40 are disposed in the cabinet 10 and are used to dissipate heat from the converter component 20. The first heat dissipation component 30 includes a first power source 31, a first partition 32, a first radiator 33 and a second radiator 34. The first power source 31 is used to drive the gas flow, the first partition 32 is used to form a specific cooling air duct, and the first radiator 33 and the second radiator 34 are used to exchange heat with the structure to be dissipated in the converter component 20.

[0047] Specifically, the first partition 32, together with the cabinet 10, forms a first external circulation channel 35. This external circulation channel refers to a channel connected to the external environment outside the cabinet 10. Both ends of the first external circulation channel 35 can be connected to the external environment. The first radiator 33 has a heat-absorbing end 331 and a heat-dissipating end 332, which are connected and capable of transferring heat. The second radiator 34 and the heat-dissipating end 332 of the first radiator 33 can both be equipped with heat dissipation fins or other structures to help improve heat dissipation efficiency.

[0048] Based on this, the heat-absorbing end 331 of the first radiator 33 and the second radiator 34 can exchange heat with the first component 21, transferring the heat generated by the first component 21 to the heat dissipation end 332 of the first radiator 33 and the second radiator 34. Then, driven by the first power source 31, gas flows through the heat dissipation end 332 of the first radiator 33 and the second radiator 34 to exchange heat with them, and finally, the heated gas is blown out to the external environment, completing the heat dissipation of at least a portion of the structure in the first component 21. Since the first external circulation channel 35 is directly connected to the cold air environment outside the cabinet 10, and the gas flows directly through the two radiators, the first heat dissipation component 30 can provide high heat dissipation efficiency and can be applied to the first component 21, which generates a large amount of heat.

[0049] Optionally, the first radiator 33 and the second radiator 34 may have the same or different structures. They can be connected to the same structure in the converter assembly 20 to jointly dissipate heat from the same structure, or they can dissipate heat from different structures respectively. The first radiator 33 and the second radiator 34 may have the same or different structures. That is, the second radiator 34 may also have a heat absorption end 331 and a heat dissipation end 332. Its heat absorption end 331 can be connected to the first assembly 21, and its heat dissipation end 332 is located in the first external circulation channel 35 for cooling.

[0050] like Figure 4 As shown, arrow A indicates the gas flow direction in the first external circulation channel 35, which can be reversed by adjusting the first power source 31. Arrow B indicates the gas flow direction in the internal circulation channel 42, which can be reversed by adjusting the second power source 41.

[0051] The first partition 32 in the first heat dissipation assembly 30 may be a structure at least partially cylindrical, made by bending and shaping a plate-like piece, used to limit the flow direction of gas. Its cross-sectional area should be able to accommodate the heat dissipation end 332 of the first heat dissipation component and the second heat dissipation component, leaving gaps around the former two to facilitate gas flow. Optionally, in order to adapt to the shape of the inner wall of the cabinet 10, the shape of the heat dissipation component, the installation position of the flow conversion assembly 20, etc., the first partition 32 may be an integral piece, or the first partition 32 may include multiple sub-components, as long as they can be used together with the cabinet 10 to form the required first external circulation channel 35 and limit the gas flow trajectory. This application does not make any specific limitations in this regard.

[0052] The second heat dissipation component 40 can be used to form an internal circulation within the receiving cavity 11 of the cabinet 10 and to dissipate heat from the second component 22, which has lower heat dissipation requirements. It can also simultaneously provide heat dissipation for at least a portion of the structure in the first component 21. Specifically, the second heat dissipation component 40 includes a second power source 41. The structures of the first power source 31 and the second power source 41 can be the same or different, and both are used to drive gas to flow along a specific channel / direction.

[0053] Based on this, at least a portion of the first heat dissipation component 30, the cabinet 10, and the first component 21 together define an inner circulation channel 42. The first heat dissipation component 30, used to define the inner circulation channel 42, can be a first partition 32. For example, the first partition 32 can at least partially enclose a near-cylindrical structure, in which case the interior of the cylindrical structure can serve as a first outer circulation channel 35, and the outer circumferential surface of the cylindrical structure can be used as the wall defining the inner circulation channel 42. The inner circulation channel 42 is an annular channel in which gas circulates repeatedly under the drive of the second power source 41.

[0054] Furthermore, the heat-absorbing end 331 of the first heat sink extends at least partially into the inner circulation channel 42, that is, the heat-absorbing end 331 of the first heat sink can exchange heat with the gas flowing along the inner circulation channel 42, and dissipate heat from the gas in the inner circulation channel 42 through its own heat-dissipating end 332 located in the first outer circulation channel 35.

[0055] In summary, the gas in the inner circulation channel 42 can exchange heat with the second component 22 during its flow. The first radiator 33 can simultaneously dissipate heat from both the gas in the inner circulation channel 42 and part of the first component 21, thus lowering the temperature of the gas in the inner circulation channel 42. The second radiator 34 can dissipate heat from the first component 21. Therefore, the flow of gas in the inner circulation channel 42 can effectively dissipate heat from the second component 22 without directly exposing it to the external environment, effectively reducing the possibility of external dust, impurities, etc., adversely affecting the reliability and service life of the second component 22.

[0056] Through the structural forms of the two heat dissipation components in this application embodiment, an internal heat dissipation circulation can be formed inside the cabinet 10, and the second component 22 can be dissipated indirectly through the first external circulation channel 35, while the first component 21 can be dissipated directly. This can specifically improve the heat dissipation intensity of the first component 21, while maintaining the reliability of the second component 22, effectively improving the overall heat dissipation efficiency and reliability of the converter 100.

[0057] In some optional embodiments, the first heat dissipation component 30 further includes a second partition 36 and a third power source 37. The second partition 36 and the cabinet 10 enclose a second external circulation channel 38. A portion of the first component 21 is disposed within the second external circulation channel 38. The third power source 37 can drive the gas outside the cabinet 10 to enter the second external circulation channel 38 and exchange heat with a portion of the first component 21 before being discharged outside the cabinet 10.

[0058] Optionally, based on the aforementioned structure, the first heat dissipation component 30 may further include a second separator 36 and a third power source 37 for separately and more efficiently dissipating heat from the high-heat-generating converter component 20.

[0059] Specifically, the second partition 36, together with the cabinet 10, can enclose a second external circulation channel 38. The second partition 36 separates the second external circulation channel 38 from the internal circulation channel 42, allowing air driven by the third power source 37 to cool a portion of the first component 21 located within the second external circulation channel 38. Similar to the first external circulation channel 35, both ends of the second external circulation channel 38 can be connected to the external environment via vents. Figure 4 As shown, arrow C indicates the direction of gas flow in the second external circulation channel 38, which can be reversed by adjusting the third power source 37.

[0060] Since the first component 21 located in the second external circulation channel 38 can directly exchange heat with the airflow driven by the third power source 37, and since the component itself is located in the second external circulation channel 38, the part of the first component 21 with higher heat generation and lower requirements for the working environment can be located in the second external circulation channel 38, thereby effectively improving the overall heat dissipation efficiency of the converter component 20.

[0061] For example, for the multiple structural components included in the converter assembly 20, these structural components can be divided into parts with high heat generation and parts with low heat generation. The parts with low heat generation are set in the circulation channel, and the parts with high heat generation are further divided into parts with high requirements for the working environment and parts with low requirements for the working environment. The structural components with high requirements are connected to the heat sink, and the heat sink is set in the first external circulation channel 35. The structural components with low requirements are directly set in the second external circulation channel 38. In this way, heat can be dissipated in a targeted manner for each structural component in the converter assembly 20, effectively improving the overall heat dissipation efficiency of the converter assembly 20.

[0062] In some optional embodiments, the receiving cavity 11 includes a top cavity 111, a main cavity 112, and a bottom cavity 113 arranged sequentially along the first direction X. A first power source 31 is disposed in the top cavity 111, a first partition 32 is disposed in the main cavity 112, a first external circulation channel 35 is connected to the top cavity 111, and a first vent 1111 is provided on the side wall 12 of the top cavity 111; a second external circulation channel 38 is connected to the bottom cavity 113, and a second vent 1131 is provided on the side wall 12 of the bottom cavity 113.

[0063] Optionally, the receiving cavity 11 may include a top cavity 111, a main cavity 112, and a bottom cavity 113 arranged sequentially and interconnected along the first direction X. The top cavity 111 and the bottom cavity 113 may have a volume smaller than that of the main cavity 112. For example, the housing may have a base, and the base encloses to form the bottom cavity 113. The converter components 20 may all be disposed in the main cavity 112.

[0064] Furthermore, the side wall 12 of the top cavity 111 is provided with a first ventilation opening 1111, and the side wall 12 of the bottom cavity 113 is provided with a second ventilation opening 1131. Here, a ventilation opening refers to an opening that penetrates the wall of the cabinet. The ventilation opening can be equipped with a barrier screen, filter, or other structure to prevent external impurities from entering the cabinet 10. The top cavity 111 can be provided with one or more first ventilation openings 1111, and the bottom cavity 113 can be provided with one or more second ventilation openings 1131. The shapes of the two ventilation openings can be circular, rectangular, or polygonal, etc., and this application does not make any specific limitation in this regard.

[0065] The first power source 31, which is applied to the first external circulation channel 35, is disposed in the top cavity 111, and the first vent 1111 can be used as the opening at one end of the first external circulation channel 35. Optionally, a small chamber containing the first power source 31 can be separated in the top cavity 111, and the small chamber can be located in the first external circulation channel 35. Alternatively, the entire top cavity 111 can be located in the first external circulation channel 35.

[0066] By making the receiving cavity 11 include a top cavity 111, a main cavity 112 and a bottom cavity 113, and setting the converter components 20 in the main cavity 112, a larger space can be provided for airflow to enter and exit the cabinet 10, which facilitates the flow of gas and makes it easy to set up ventilation openings with a certain area. At the same time, the converter components 20 can be made compact, reducing the length and cost of the required connecting parts.

[0067] In some optional embodiments, the cavity wall of the main cavity 112 is provided with a third ventilation port 1121, and the two ends of the first external circulation channel 35 are respectively connected to the first ventilation port 1111 and the third ventilation port 1121; along the first direction X, the orthographic projection of the third ventilation port 1121 is offset from the orthographic projection of the first ventilation port 1111.

[0068] Similar to the arrangement of the first vent 1111 and the second vent 1131, the cavity wall of the main body cavity 112 can also be provided with a third vent 1121. The first external circulation channel 35 is connected between the third vent 1121 and the first vent 1111. That is, for the first external circulation channel 35, one of the first vent 1111 and the third vent 1121 is an air inlet and the other is an air outlet. Specifically, this can be reversed by changing the driving direction of the first power source 31.

[0069] Understandably, the third vent 1121, located on the wall of the main cavity 112, should be positioned so that one end of the first external circulation channel 35 is directly opposite to it, and the vent is offset from the internal circulation channel 42. In other words, the third vent 1121 should be located in an area of ​​the main cavity 112 other than the area used to enclose and form the internal circulation channel 42. The area of ​​the third vent 1121 can be less than or equal to the cross-sectional area of ​​the first external circulation channel 35 to avoid gas leakage and other problems caused by the vent connecting with other areas of the main cavity 112.

[0070] Furthermore, based on this, when projecting an orthographic projection along the first direction X, the orthographic projection of the third vent 1121 is staggered from the orthographic projection of the first vent 1111, so that there is a certain distance between them. For example, in an embodiment where the cabinet 10 has multiple side walls 12, the first vent 1111 and the third vent 1121 may not be located on the same side wall 12.

[0071] By offsetting the orthographic projections of the first vent 1111 and the third vent 1121 along the first direction X, a certain distance can be ensured between the two types of vents. This prevents the first external circulation channel 35 from drawing back the high-temperature gas that has just been discharged into the external environment into the channel when it is receiving air. This avoids the problem of reduced heat dissipation efficiency due to the increased temperature of the intake air and improves the reliability of the converter 100.

[0072] In some alternative embodiments, the cabinet 10 includes a plurality of side walls 12, one of which is provided with a third ventilation opening 1121, and each of the other side walls 12 is provided with a first ventilation opening 1111.

[0073] Optionally, the cabinet 10 in this embodiment may have a relatively regular shape, and its cross-sectional shape formed in a cross section perpendicular to the first direction X may be a rectangle or other polygons, so that the cabinet 10 has multiple side walls 12, and the extending direction of these side walls 12 may be parallel to the first direction X. The multiple side walls 12 and the top and bottom walls of the cabinet 10 enclose a receiving cavity 11. In an embodiment where the receiving cavity 11 includes a top cavity 111, a main cavity 112, and a bottom cavity 113, the cross-sectional shapes formed by the three sub-cavities in a cross section perpendicular to the first direction X may all be the same, so that the outer wall of the cabinet 10 is flat, which facilitates processing and assembly.

[0074] Based on this, one of the multiple sidewalls 12 can be provided with a third vent 1121, and the specific one can be selected according to the extension direction of the first external circulation. Except for the sidewall 12 with the third vent 1121, each of the other sidewalls 12 can be provided with a first vent 1111, that is, multiple first vents 1111 are provided at the top cavity 111, so that air can flow rapidly between the top cavity 111 and the external environment, increasing the gas flow rate that can pass through per unit time. While keeping the first vents 1111 and the third vent 1121 far apart from each other, the convenience and flexibility of gas flow at the top cavity 111 are improved, and the heat dissipation effect of the first external circulation channel 35 is further improved.

[0075] In some optional embodiments, the cavity wall of the main cavity 112 is also provided with a fourth ventilation port, and the two ends of the second external circulation channel 38 are respectively connected to the second ventilation port 1131 and the fourth ventilation port. The fourth ventilation port is directly opposite to the third power source 37. The cabinet 10 includes multiple side walls 12, and each side wall 12 is provided with a second ventilation port 1131.

[0076] Similar to the third vent 1121, the cavity wall of the main body cavity 112 is also provided with a fourth vent. This vent, along with the second vent 1131, is respectively connected to both ends of the second external circulation channel 38. One is an air inlet, and the other is an air outlet. The air inlet and outlet directions can be switched by adjusting the driving direction of the airflow by the third power source 37. The specific location of the fourth vent on the cavity wall of the main body cavity 112 can be determined based on the extension direction of the second external circulation channel 38 and the connection relationship between the first component 21 located in the channel and other structural components. This application does not impose any specific limitations on this.

[0077] Optionally, in embodiments where a third vent 1121 and a fourth vent are provided simultaneously, the two vents can be located on different side walls 12 with a large distance between them, to avoid mutual interference between their air intake and exhaust, reduce the possibility of high-temperature gas being directly drawn back into the circulation channel, and enable the converter 100 to maintain good heat dissipation efficiency.

[0078] Furthermore, the second vent 1131 is disposed in the bottom cavity 113, so that each sidewall 12 located in the bottom cavity 113 is provided with a second vent 1131, so that gas can flow quickly between the bottom cavity 113 and the external environment. At the same time, the third power source 37 is disposed opposite to the fourth vent, thereby enabling smooth gas flow and improved heat exchange efficiency in the second external circulation channel 38.

[0079] In some optional embodiments, the first component 21 includes a first sub-component 211 and a second sub-component 212. The first sub-component 211 is connected to the heat absorption end 331 and the second radiator 34, and the second sub-component 212 is disposed in the second external circulation channel 38. The first sub-component 211, the cabinet 10, the first partition 32 and the second partition 36 together enclose an internal circulation channel 42, and both the first sub-component 211 and the second component 22 are at least partially located in the internal circulation channel 42.

[0080] As mentioned above, the various parts in the converter component 20 can be divided according to their heat generation and dissipated through different heat dissipation components. The converter component 20 includes a first component 21 and a second component 22. The heat dissipation intensity of the first component 21 is greater than that of the second component 22. The first component 21 may further include a first sub-component 211 and a second sub-component 212.

[0081] Furthermore, the first radiator 33 and the second radiator 34 in the first heat dissipation assembly 30 can exchange heat with the first sub-assembly 211 and discharge their heat outside the cabinet 10 by exchanging heat with the gas passing through the first external circulation channel 35. The second sub-assembly 212 is directly disposed in the second external circulation channel 38, and heat is dissipated by the third power source 37 driving the airflow through the second sub-assembly 212 and directly exchanging heat with the second sub-assembly 212. The first sub-assembly 211 and the second sub-assembly 212 can be distinguished according to the requirements of the working environment and the connection relationship with other components in the converter assembly 20.

[0082] Based on this, at least a portion of the first component 21 and at least a portion of the second component 22 can be located within the inner circulation channel 42. This inner circulation channel 42 can be formed by at least a portion of the components of the first sub-component 211 having a predetermined shape or volume, along with the cabinet 10, the first partition 32, and the second partition 36. The first partition 32 can be used to separate the inner circulation channel 42 from the first outer circulation channel 35, and the second partition 36 can be used to separate the inner circulation channel 42 from the second outer circulation channel 38. A portion of the first sub-component 211 with a larger volume or a specific shape can be used to assist in adjusting the flow trajectory of the gas in the inner circulation channel 42, so that the inner circulation channel 42 can dissipate heat from the components it passes through.

[0083] By incorporating the first sub-component 211 as part of the structure that encloses and forms the inner circulation channel 42, the extension direction of the inner circulation channel 42 can be adjusted by utilizing the shape and structure of the first sub-component 211 itself. This further ensures that the airflow in the inner circulation channel 42 can flow through a preset position without adding any separators, or further ensures that all components that need to exchange heat can be located in the inner circulation channel 42.

[0084] In some optional embodiments, along the first direction X, the first sub-component 211 is disposed between the first separator 32 and the second sub-component 212 and the second component 22, and along the second direction Y, the second sub-component 212 and the second component 22 are disposed correspondingly, and the first direction X and the second direction Y intersect; along the first direction X, the orthographic projection of the second power source 41 is located on the side of the orthographic projection of the second component 22 that is opposite to the orthographic projection of the second separator 36.

[0085] Optionally, in the first direction X, the second sub-component 212 and the second component 22 can be located on the same side of the first sub-component 211 to provide sufficient space for the first heat dissipation component 30 connected to the first sub-component 211. The second sub-component 212 and the second component 22 can be correspondingly arranged along the second direction Y, that is, along the second direction Y, the orthographic projection of the second sub-component 212 and the orthographic projection of the second component 22 can at least partially overlap each other. The first direction X and the second direction Y intersect, and can further be optionally arranged perpendicular to each other.

[0086] Based on this, the second power source 41 used to drive the gas flow in the internal circulation channel 42 can be set on the side of the second component 22 away from the second partition 36. That is, along the first direction X, the orthographic projection of the second power source 41 can be located on the side of the orthographic projection of the second sub-component 212 away from the orthographic projection of the second partition 36, so that the second power source 41 and the third power source 37 are kept apart to avoid mutual interference.

[0087] Furthermore, the second power source 41 can be located in a cavity with a certain internal space capacity, meaning that the converter component 20 can be omitted in a certain area around it, in order to ensure the smooth flow of gas at the power source and avoid the first sub-component 211 or the second component 22 from obstructing the flow of gas in the inner circulation channel 42.

[0088] Optionally, in embodiments where the chamber shape of the converter component 20 is relatively regular and the structure of the converter component 20 is relatively compact, a portion of the cavity wall enclosed by the cabinet 10 to form the main cavity 112 can protrude away from the center of the main cavity 112. This protruding portion may only contain the second power source 41, without the converter component 20. The shape and size of the protruding portion can be set according to the size of the second power source 41 and the specific trajectory path of the internal circulation channel 42; this application does not impose specific limitations on this.

[0089] By placing the second power source 41 and the second partition 36 on opposite sides of the second sub-component 212, interference between the second power source 41 and the third power source 37 can be avoided. At the same time, the airflow driven by the second power source 41 can enter the inner circulation channel 42 more directly and quickly and flow through the second sub-component 212, thereby improving heat dissipation efficiency.

[0090] Please see Figure 5 , Figure 5 This is a circuit diagram of a converter provided in one embodiment of this application.

[0091] In some optional embodiments, the first sub-component 211 includes a capacitor bank 2111 arranged along the second direction Y and a power component 2112, the capacitor bank 2111 being connected to the heat absorption end 331 and the power component 2112 being connected to the second heat sink 34; the second sub-component 212 includes an AC reactor 2121; the second component 22 includes an AC circuit breaker 221, a DC switch 222, a DC fuse 223, a DC connection terminal 224, an AC connection terminal 225 and an AC filter capacitor 226.

[0092] The converter 100 in this embodiment is used to process power signals, such as converting between direct current and alternating current. Based on this, in the converter assembly 20 provided in this embodiment, the first sub-assembly 211 may include a capacitor bank 2111 and a power assembly 2112 arranged along the second direction Y. The capacitor bank 2111 has a larger volume and a larger width in the third direction Z, while the power assembly 2112 has a smaller width in the third direction Z. Therefore, the capacitor bank 2111 can be used as part of the structure enclosing the inner circulation channel 42, allowing the inner circulation channel 42 to pass through the side of the power assembly 2112. The first direction X, the second direction Y, and the third direction Z are arranged in pairs, or more preferably, in pairs perpendicularly.

[0093] Furthermore, the capacitor bank 2111 is connected to the heat absorption end 331 of the first heat sink 33, which can be selected by mutual contact, pressing, snapping, bonding or fastening, etc. The power component 2112 is connected to the second heat sink 34 and dissipates heat through the second heat sink 34 and the internal circulation channel 42.

[0094] The second sub-component 212 may include an AC reactor 2121, and the second component 22 may include an AC circuit breaker 221, a DC switch 222, a DC fuse 223, a DC connection terminal 224, an AC connection terminal 225, and an AC filter capacitor 226. Based on this, the AC reactor 2121 can be electrically connected between the AC circuit breaker 221 and the power component 2112. The AC filter capacitor 226 is connected at the three-phase circuit trace between the AC circuit breaker 221 and the AC reactor 2121. The power component 2112 and the capacitor bank 2111 can both be connected in series between two traces, with the DC switch 222 and the DC fuse 223 respectively connected in series on these two traces. The DC connection terminal 224 and the AC connection terminal 225 are used to electrically connect the converter 100 to external DC circuit components and external AC circuit components, respectively.

[0095] By dividing the aforementioned converter component 20 into a first sub-component 211, a second sub-component 212, and a second component 22, it is possible to specifically and effectively dissipate heat from the power component 2112 and the AC reactor 2121, which generate a large amount of heat. Furthermore, the components in the second component 22 are placed inside the cabinet 10 for protection, thereby effectively improving the compactness of the converter 100 structure and its heat dissipation efficiency.

[0096] In some optional embodiments, the first component 21 includes a plurality of power components 2112 spaced apart along the third direction Z, with the first direction X, the second direction Y and the third direction Z intersecting each other; the first heat dissipation component 30 includes a plurality of second heat sinks 34, which are arranged along the third direction Z, and are connected one-to-one with the plurality of power components 2112.

[0097] The second sub-component 212 in this embodiment includes an AC reactor 2121. Based on this, the first component 21 may include a plurality of power components 2112, and these power components 2112 may be arranged at intervals along the third direction Z. Optionally, the spacing between any two adjacent power components 2112 may be greater than the extension dimension of a single power component 2112 in that direction, thereby enabling the airflow in the inner circulation channel 42 to pass between adjacent power components 2112, thereby improving heat exchange efficiency.

[0098] Corresponding to the power component 2112, the first external circulation channel 35 may include a plurality of second heat sinks 34, which are arranged one-to-one with the power component 2112 to effectively improve heat dissipation efficiency. It is understood that when the first external circulation channel 35 is formed by the first partition 32, each of the second heat sinks 34 can be located in the same channel to expand the cross-sectional area of ​​the channel; alternatively, the first partition 32 can be used to enclose and form multiple sub-channels, with each sub-channel containing one second heat sink 34, to reduce the possibility of mutual interference between the multiple second heat sinks 34.

[0099] By allowing the gas in the internal circulation channel 42 to flow between adjacent power components 2112 and by providing multiple second heat sinks 34 corresponding one-to-one with the power components 2112, the heat dissipation efficiency for the first sub-component 211 can be effectively improved.

[0100] In some optional embodiments, along the first direction X, the AC circuit breaker 221 and the AC connection terminal 225 are arranged in sequence, the DC switch 222, the DC fuse 223 and the DC connection terminal 224 are arranged in sequence, and the AC filter capacitor 226 is disposed on at least one side of the second separator 36 in the third direction Z. The first direction X, the second direction Y and the third direction Z are arranged to intersect each other.

[0101] The second component 22 includes various structural parts, wherein the AC circuit breaker 221 and the AC connection terminal 225 are arranged correspondingly along the first direction X, and the DC switch 222, DC fuse 223, and DC connection terminal 224 are also arranged correspondingly along the first direction X. This means that AC-related components can be arranged along the first direction X and electrically connected sequentially, and DC-related components can also be arranged along the first direction X and electrically connected sequentially, thereby reducing the size and cost of the connectors required for connecting the various components. The DC connection terminal 224 can be positioned close to the AC connection terminal 225 to facilitate the installation of wiring harnesses and other components for electrical connection to other external devices.

[0102] Optionally, the AC filter capacitor 226 may be disposed on at least one side of the second separator 36 in the third direction Z, and more preferably, it may be disposed symmetrically on opposite sides of the second separator 36 in the third direction Z. The converter assembly 20 may include a plurality of AC filter capacitors 226, which may be symmetrically disposed on both sides of the second separator 36. Exemplarily, the converter assembly 20 may be arranged in multiple rows extending along the second direction Y to adapt to the dimensions of the second separator 36 in that direction.

[0103] By arranging the various converter components 20 in the aforementioned positions, the required length of the connectors between the components can be reduced, and the space within the main cavity 112 can be fully utilized.

[0104] In some alternative embodiments, the second sub-component 212 includes a plurality of DC switches 222, a plurality of DC fuses 223, and a plurality of DC connection terminals 224, with the plurality of DC fuses 223 respectively disposed on opposite sides of the AC circuit breaker 221 along the third direction Z.

[0105] As mentioned above, the DC-related components in the second component 22 can be arranged along the first direction X, and the AC-related components can be arranged along the second direction Y. A set of DC switches 222, DC fuses 223 and DC connection terminals 224 corresponding to the first direction X are denoted as a DC component group, and a set of AC circuit breakers 221 and AC connection terminals 225 corresponding to the first direction X are denoted as an AC component group. Then the DC unit group and the AC unit group can be arranged alternately and symmetrically along the third direction Z.

[0106] Taking the second component 22, which includes two DC component groups and one AC component group, as an example, the two DC component groups can be symmetrically arranged on both sides of the AC component group to shorten and maintain the same path for both to connect to other components, thereby avoiding differences in the functions provided by multiple DC component groups. At the same time, placing the DC component groups close to the side edges makes it easier to maintain the DC circuit breakers within them, thus improving the practicality of the converter 100.

[0107] It is understood that the converter assembly 20 in the embodiments of this application may also include other numbers of DC component groups and AC component groups. For example, in an embodiment where there is one DC component group and one AC component group, they are arranged along the third direction Z; in an embodiment where the converter assembly 20 includes two AC component groups and one DC component group, the two AC component groups are respectively disposed on opposite sides of the DC component group in the third direction Z; in an embodiment where the converter assembly 20 includes two DC component groups and two AC component groups, the two AC component groups can be arranged adjacently and along the third direction Z, and the two DC component groups are respectively disposed on the side of the two AC component groups away from each other.

[0108] In some optional embodiments, the first heat dissipation component 30 includes a plurality of first power sources 31 and a plurality of third power sources 37, and the second heat dissipation component 40 includes a plurality of second power sources 41; the plurality of first power sources 31, the plurality of second power sources 41, and the plurality of third power sources 37 are arranged sequentially along the third direction Z.

[0109] The converter 100 in this embodiment includes a first power source 31 for driving the gas flow in the first external circulation channel 35, a second power source 41 for driving the gas flow in the internal circulation channel 42, and a third power source 37 for driving the gas flow in the second external circulation channel 38. Multiple power sources can be provided to increase the gas flow rate per unit time and improve the heat dissipation effect.

[0110] Specifically, the multiple first power sources 31, multiple second power sources 41, and multiple third power sources 37 can all be arranged along the third direction Z, and can be arranged in a connected manner or at intervals. The number of first power sources 31 can correspond to the number of first heat sinks or the number of second heat sinks; the number of third power sources 37 can correspond to the number of AC reactors 2121, and the multiple third power sources 37 are arranged one-to-one with the multiple AC reactors 2121 to further improve heat dissipation.

[0111] Regarding the second power source 41, the converter component 20 in this embodiment may include a variety of different numbers of DC component groups and AC component groups, and the arrangement may be changed according to their numbers. Based on this, the number of second power sources 41 used to drive the gas flow in the inner circulation channel 42 may correspond to the number of the aforementioned two component groups, that is, the number of second power sources 41 may be equal to the sum of the number of DC component groups and the number of AC component groups. In this case, the second power source 41 may be arranged one-to-one with the DC component groups and the AC component groups along the second direction Y, so as to cool each component group in a targeted manner.

[0112] By setting multiple power sources, the heat dissipation efficiency of each component in the converter module can be effectively improved, thereby improving the overall heat dissipation effect of the converter 100.

[0113] In some alternative embodiments, the first power source 31, the second power source 41, and the third power source 37 are all centrifugal fans.

[0114] In this embodiment, the first power source 31, the second power source 41, and the third power source 37 are all used to drive gas flow. These can be fans, and more specifically, centrifugal fans, i.e., fans that use impeller rotation to generate centrifugal force to radially push gas. The gas enters the centrifugal fan axially, turns 90°, and is then output radially. This fan allows for easy adjustment of the direction of the airflow and can generate high air pressure, enabling the airflow to pass smoothly through dense heat dissipation fins. It is suitable for environments with limited space where a specific directional gas circulation channel needs to be formed.

[0115] By setting all three aerodynamic sources for heat dissipation in the converter 100 as centrifugal fans, the heat dissipation efficiency and heat dissipation effect can be further improved.

[0116] Secondly, according to the embodiments of this application, an energy storage device is proposed, including the converter 100 in any embodiment of the first aspect.

[0117] This application also proposes an energy storage device, including the aforementioned converter 100. In addition to the converter 100, the energy storage device may also include battery modules, a battery management system, a heat dissipation module, a control module, and a fireproof module, etc., which can be configured according to the required functions. Optionally, in embodiments where the energy storage device has an external housing structure, the ventilation openings on the converter 100 cabinet 10 can directly exchange gases with the interior of the housing structure, or they can be connected to the external environment outside the housing structure through pipes, etc. This application does not impose specific limitations on this.

[0118] The energy storage device provided in this application has all the beneficial effects of the converter 100 provided in the first aspect. For details, please refer to the specific description of the converter 100 in the above embodiments. This application will not repeat the details here.

[0119] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A converter, characterized in that, include: The cabinet is enclosed to form a receiving cavity; A converter component is disposed in the receiving cavity. The converter component includes a first component and a second component, wherein the heat dissipation intensity of the first component is greater than that of the second component. A first heat dissipation component is disposed in the cabinet. The first heat dissipation component includes a first power source, a first partition, a first radiator, and a second radiator. The first partition and the cabinet form a first external circulation channel. The first radiator has a heat absorption end and a heat dissipation end. The second radiator and at least part of the heat dissipation end are disposed in the first external circulation channel. The second radiator and the heat absorption end are used to absorb at least part of the heat of the first component. The first power source can drive the gas outside the cabinet to enter the first external circulation channel and exchange heat with the heat dissipation end and the second radiator before being discharged outside the cabinet. A second heat dissipation component is disposed in the cabinet. The second heat dissipation component includes a second power source. The first heat dissipation component, the cabinet, and at least a portion of the first component enclose an inner circulation channel. The heat absorption end extends at least partially into the inner circulation channel. The second power source can drive the gas in the inner circulation channel to circulate, so as to absorb at least a portion of the heat from the first component and the second component and transfer it to the heat absorption end.

2. The converter according to claim 1, characterized in that, The first heat dissipation component also includes a second partition and a third power source. The second partition and the cabinet form a second external circulation channel. A portion of the first component is disposed in the second external circulation channel. The third power source can drive the gas outside the cabinet into the second external circulation channel and exchange heat with a portion of the first component before being discharged outside the cabinet.

3. The converter according to claim 2, characterized in that, The accommodating cavity includes a top cavity, a main cavity, and a bottom cavity arranged sequentially along a first direction. The first power source is disposed in the top cavity, the first partition is disposed in the main cavity, the first external circulation channel is connected to the top cavity, and a first ventilation opening is provided on the side wall of the top cavity. The second external circulation channel is connected to the bottom cavity, and the side wall of the bottom cavity is provided with a second ventilation opening.

4. The converter according to claim 3, characterized in that, The cavity wall of the main cavity is provided with a third ventilation opening, and the two ends of the first external circulation channel are respectively connected to the first ventilation opening and the third ventilation opening; Along the first direction, the orthographic projection of the third vent is offset from the orthographic projection of the first vent.

5. The converter according to claim 4, characterized in that, The cabinet includes multiple side walls, one of which is provided with the third ventilation opening, and the remaining side walls are provided with the first ventilation opening.

6. The converter according to claim 3, characterized in that, The cavity wall of the main cavity is also provided with a fourth ventilation port. The two ends of the second external circulation channel are respectively connected to the second ventilation port and the fourth ventilation port. The fourth ventilation port is positioned directly opposite the third power source. The cabinet includes multiple side walls, and each side wall is provided with a second ventilation opening.

7. The converter according to claim 2, characterized in that, The first component includes a first sub-component and a second sub-component. The first sub-component is connected to the heat-absorbing end and the second heat sink, and the second sub-component is disposed in the second external circulation channel. The first sub-component, the cabinet, the first partition, and the second partition together enclose the inner circulation channel, and the first sub-component and the second component are at least partially located in the inner circulation channel.

8. The converter according to claim 7, characterized in that, Along a first direction, the first sub-component is disposed between the first separator and the second sub-component and the second component; along a second direction, the second sub-component and the second component are disposed correspondingly; the first direction and the second direction intersect. Along the first direction, the orthographic projection of the second power source is located on the side where the orthographic projection of the second component is opposite to the orthographic projection of the second separator.

9. The converter according to claim 8, characterized in that, The first sub-component includes a capacitor bank and a power component arranged along the second direction. The capacitor bank is connected to the heat absorption end, and the power component is connected to the second heat sink. The second sub-component includes an AC reactor; The second component includes an AC circuit breaker, a DC switch, a DC fuse, a DC connection terminal, an AC connection terminal, and an AC filter capacitor.

10. The converter according to claim 9, characterized in that, The first component includes a plurality of power components spaced apart along a third direction, wherein the first direction, the second direction, and the third direction intersect each other. The first heat dissipation component includes a plurality of second heat sinks, which are arranged along the third direction, and are connected to the plurality of power components one by one.

11. The converter according to claim 9, characterized in that, Along the first direction, the AC circuit breaker and the AC connection terminal are arranged in sequence, the DC switch, the DC fuse and the DC connection terminal are arranged in sequence, and the AC filter capacitor is disposed on at least one side of the second separator in the third direction. The first direction, the second direction and the third direction are arranged to intersect each other.

12. The converter according to claim 11, characterized in that, The second component includes a plurality of DC switches, a plurality of DC fuses, and a plurality of DC connection terminals, wherein the plurality of DC fuses are respectively disposed on opposite sides of the AC circuit breaker along the third direction.

13. The converter according to any one of claims 9 to 12, characterized in that, The first heat dissipation component includes a plurality of first power sources and a plurality of third power sources, and the second heat dissipation component includes a plurality of second power sources; Multiple first power sources, multiple second power sources, and multiple third power sources are arranged sequentially along a third direction.

14. The converter according to claim 2, characterized in that, The first power source, the second power source, and the third power source are all centrifugal fans.

15. An energy storage device, characterized in that, Including the converter as described in any one of claims 1 to 14.

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