Energy storage converter, energy storage system and electric device

Abstract

This application relates to the field of energy storage technology, and provides an energy storage converter, an energy storage system, and an electrical device. The energy storage converter includes: a housing with a receiving cavity; the receiving cavity includes a high-voltage chamber; functional components, with multiple functional components disposed within the high-voltage chamber; wherein at least some of the functional components are equipped with mounting bases, and the mounting bases are detachably connected to the bottom plate of the housing; adjacent functional components are electrically connected via electrical connectors; the electrical connectors are detachably connected to the functional components. This application solves the problem of inconvenient component maintenance and replacement caused by the fixed design of internal functional components of the energy storage converter for a single demand.

Description

Technical Field

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

[0002] With the rapid development of the new energy industry and energy storage technology, power conversion systems (PCS), as the core equipment in energy storage systems that realize power conversion between DC and AC, are widely used in grid-side energy storage, industrial and commercial energy storage, and residential energy storage scenarios. A power conversion system typically includes a housing and various functional components housed within it, such as high-voltage devices like circuit breakers, relays, fuses, and DC EMI boards, as well as control and power devices like auxiliary power boards and AC output boards. These components are electrically interconnected through conductive connectors to jointly perform functions such as power conversion, electrical protection, and signal control.

[0003] In related technologies, the various functional components inside the energy storage converter housing are usually designed and fixedly assembled as a whole according to the requirements of a single project or product. Summary of the Invention

[0004] This application provides an energy storage converter, an energy storage system, and an electrical device, which helps to solve the problems of long design cycles, high production costs, and inconvenient device maintenance and replacement caused by the fixed design of internal functional components of the energy storage converter for a single demand.

[0005] This application provides an energy storage converter, comprising: a housing having a receiving cavity, the receiving cavity including a high-voltage chamber; functional devices, a plurality of the functional devices being disposed in the high-voltage chamber; wherein at least some of the functional devices are provided with mounting bases, the mounting bases being detachably connected to the bottom plate of the housing; adjacent functional devices being electrically connected via electrical connectors; the electrical connectors being detachably connected to the functional devices.

[0006] Optionally, the functional components include a circuit breaker, a fuse, a relay, and a DC EMI board; the relay and the fuse are integrated on the same mounting base, and the fuse is stacked vertically above the relay; the fuse is supported and connected above the relay through the electrical connector, and the fuse is electrically connected to the relay through the electrical connector.

[0007] Optionally, the fuse and the relay are spaced apart in the vertical direction; in the vertical direction, an insulating gap is formed between the fuse and the relay.

[0008] Optionally, the circuit breaker, the fuse, the relay, and the DC EMI board are electrically connected in sequence via electrical connectors.

[0009] Optionally, each of the mounting bases has an outwardly extending mounting portion around its periphery, and the mounting portion has a fastening hole. The mounting base is detachably connected to the bottom plate of the housing by a fastener passing through the fastening hole.

[0010] Optionally, the electrical connection between adjacent functional devices includes a positive electrical connection and a negative electrical connection, wherein the positive electrical connection and the negative electrical connection are respectively connected to the corresponding polarity terminals of the adjacent functional devices.

[0011] Optionally, the base plate divides the receiving cavity into an upper receiving cavity and a lower receiving cavity stacked vertically; the upper receiving cavity includes the high-voltage chamber, a first chamber, and a second chamber, wherein an auxiliary power supply board is provided in the first chamber; an AC output board is provided in the second chamber; a cooling fan, a heat sink, and an inductor are sequentially arranged along a first direction in the lower receiving cavity; wherein the heat sink is thermally connected to the heat-generating components on the auxiliary power supply board and / or the AC output board, and the inductor is electrically connected to the auxiliary power supply board and / or the AC output board.

[0012] Optionally, the functional components include a circuit breaker, a fuse, a relay, and a DC EMI board; the end of the circuit breaker away from the fuse is electrically connected to the access terminal at the rear of the enclosure via the electrical connector; the end of the DC EMI board away from the relay is electrically connected to the auxiliary power supply board via the electrical connector.

[0013] Optionally, the radiator is provided with fixing seats at both ends in the second direction, and the fixing seats are detachably connected to the housing. The radiator is detachably connected to the housing through the fixing seats; the first direction and the second direction intersect.

[0014] Optionally, the cooling fan is located at one end of the lower receiving cavity in the first direction, and the cooling fan is correspondingly arranged with the high-voltage chamber; the cooling fan draws in air from outside the chamber, and the air passes through the radiator and the inductor in sequence for heat exchange, and is discharged from the side plate of the chamber on the side of the inductor.

[0015] Optionally, a vent is provided on the base plate to connect the high-pressure chamber and the lower receiving cavity; the cooling fan has an air inlet side and an air outlet side opposite to each other in a first direction, and the vent is provided on the air outlet side of the cooling fan.

[0016] Optionally, the upper cavity may also be provided with a first cable management bracket extending in a first direction and a second cable management bracket extending in a second direction, wherein the first direction and the second direction intersect.

[0017] This application also provides an energy storage system, including an energy storage converter as described in any of the preceding claims.

[0018] This application also provides an electrical device, including an energy storage converter as described in any of the preceding claims.

[0019] The technical solution provided in this application has at least the following advantages: This application provides independent mounting bases for functional components within the high-voltage enclosure, with a detachable connection between the mounting bases and the enclosure's base plate. Each functional component can be independently mounted on the base plate in a modular fashion. This allows for flexible selection and replacement of components with corresponding performance parameters based on the performance requirements of different projects or products, without requiring a complete redesign of the enclosure. This significantly shortens the product design and production cycles and reduces production costs. Furthermore, adjacent functional components are electrically connected via detachable electrical connectors. When a component needs replacement or repair, it can be removed simply by disconnecting its mounting base and the corresponding electrical connectors, without affecting the installation of other functional components, thus improving the maintainability and maintenance efficiency of the energy storage converter. In addition, the modular installation method allows the energy storage converter to adapt to fixed wiring routes and fixed test platforms, achieving plug-and-play functionality and further reducing labor costs. Attached Figure Description

[0020] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this application or in the conventional technology, the drawings used in 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.

[0021] Figure 1 This is a schematic diagram of the structure of an energy storage converter provided in one embodiment of this application; Figure 2 This is a schematic diagram of the upper structure of an energy storage converter provided in an embodiment of this application; Figure 3 This is a schematic diagram of the lower internal structure of an energy storage converter provided in an embodiment of this application; Figure 4A top view of the upper structure of an energy storage converter provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of functional devices in an energy storage converter provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a functional device in an energy storage converter provided in one embodiment of this application, from another perspective.

[0022] Explanation of reference numerals in the attached figures: 10. Enclosure; 11. Base plate; 111. Vent hole; 12. Upper cavity; 121. High-voltage chamber; 122. First chamber; 123. Second chamber; 13. Lower cavity; 14. Side plate; 15. Connection terminal; 20. Functional components; 21. Circuit breakers; 22. Fuses; 23. Relays; 24. DC EMI boards; 30. Mounting base; 31. Mounting part; 311. Fastening hole; 32. Support component; 40. Electrical connectors; 50. Auxiliary power supply board; 60. AC output board; 70. Cooling fan; 80. Heat sink; 81. Mounting bracket; 90. Inductor; 101. Cable management frame; 1011. First cable management bracket; 1012. Second cable management bracket. Detailed Implementation

[0023] As described in the background section, in related technologies, the functional components inside the energy storage converter enclosure are typically designed and fixedly assembled based on the needs of a single project or product. When facing product requirements with different projects or performance specifications, this results in long product design cycles, long production cycles, and high production costs. Furthermore, during the use and maintenance of the energy storage converter, the inspection and replacement of the internal functional components present inconvenience. The root cause of this problem lies in the fact that in the high-voltage enclosure of existing energy storage converters, functional components such as circuit breakers, relays, fuses, and DC EMI boards are typically fixedly assembled with the enclosure. Each functional component is directly fixed to a specific position inside the enclosure, rather than achieving a detachable connection with the enclosure through an independent, standardized installation structure. In this fixed assembly mode, the installation position, installation interface, and electrical connections of each functional component are deeply coupled with the specific enclosure structure, forming a customized overall solution for a single project requirement. When product requirements change, such as needing to replace circuit breakers or fuses with different rated parameters to adapt to energy storage systems of different power levels, the installation and electrical connection methods of each functional component are specifically designed for the original enclosure structure. Therefore, it is impossible to replace individual functional components independently without altering the overall enclosure structure. Instead, the internal component layout, installation structure, and electrical wiring must be completely redesigned and remanufactured. This leads to redundant investment in product design and production, significantly extending the design and production cycles and increasing production costs. Furthermore, in maintenance scenarios after the energy storage converter is put into operation, the electrical connections between functional components also use fixed connections. When a functional component needs maintenance or replacement, maintenance personnel must dismantle all fixed connections related to that component, potentially affecting the installation status of adjacent functional components, increasing the complexity and time cost of maintenance operations.

[0024] This application provides an energy storage converter. By configuring independent mounting bases for each functional component within the high-voltage chamber of the enclosure, and detachably connecting the mounting bases to the enclosure's base plate, and electrically connecting adjacent functional components via detachable electrical connectors, each functional component can be independently mounted on the enclosure's base plate in a modular manner. Based on this, functional components with corresponding performance parameters can be flexibly selected and replaced according to the performance requirements of different projects or products without requiring a complete redesign of the enclosure, thus significantly shortening the product design and production cycles and reducing production costs. Furthermore, when a functional component needs to be replaced or repaired, it can be independently removed simply by disconnecting its mounting base and corresponding electrical connectors, without affecting the installation status of other functional components, improving the maintainability and maintenance efficiency of the energy storage converter. In addition, the modular installation method allows the energy storage converter to adapt to fixed wiring routes and fixed test platforms, achieving plug-and-play functionality and further reducing labor costs.

[0025] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined. Similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple pieces" refers to two or more pieces (including two pieces).

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after are in an "or" relationship.

[0028] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this application. For example, if the device or element in the illustration is inverted, then the element described as "below," "under," "below," or "bottom" of other elements or features will be oriented "above" or "top" of said other elements or features. Therefore, the term "below" may cover both above and below orientation depending on the context in which the term is used, which will be obvious to those skilled in the art. Materials may be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatial relative descriptive terms used herein may be interpreted accordingly.

[0029] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0030] In the description of embodiments of this application, the terms "about," "approximately," "roughly," or "about" for a numerical value referring to a specific parameter include the numerical value, and those skilled in the art will understand that the deviation from the numerical value is within the acceptable tolerance of the specific parameter. For example, "about" or "about" for a numerical value may include additional numerical values ​​that are in the range of 90.0% to 110.0% of the numerical value, such as in the range of 95.0% to 105.0%, 97.5% to 102.5%, 99.0% to 101.0%, 99.5% to 100.5%, or 99.9% to 100.1%.

[0031] In the accompanying drawings corresponding to the embodiments of this application, the thickness and / or area of ​​layers, films, panels, regions, etc., are enlarged for better understanding and ease of description. Throughout the specification, the same reference numerals denote the same elements. Furthermore, when describing a component as being "generally" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0032] In the description of embodiments of this application, when a component "includes" another component, other components are not excluded unless otherwise stated, and may be further included. When describing a component (such as a layer, film, region, or substrate) on or on the surface of another component, the component may be "directly" located on the surface of the other component, or there may be an intermediate component between the two components. Conversely, when describing a component on the surface of another component, or a component "directly" on another component, or a component surface on which another component is formed or disposed, it indicates that there is no intermediate component between the two components. For simplicity and clarity, various components may be drawn at any scale. In the drawings, some components may be omitted for simplicity.

[0033] The terminology used in the description of the various embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments and the appended claims, the term "the component" is also intended to include the plural form unless the context clearly indicates otherwise.

[0034] The “components” mentioned above can refer to layers, films, regions, parts, plates, or structures, etc.

[0035] The embodiments of this application will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0036] Figure 1 This is a schematic diagram of the structure of an energy storage converter provided in one embodiment of this application; Figure 2 This is a schematic diagram of the upper structure of an energy storage converter provided in an embodiment of this application; Figure 3 This is a schematic diagram of the lower internal structure of an energy storage converter provided in an embodiment of this application; Figure 4 A top view of the upper structure of an energy storage converter provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of functional devices in an energy storage converter provided in an embodiment of this application; Figure 6This is a schematic diagram of the structure of a functional device in an energy storage converter provided in one embodiment of this application, from another perspective.

[0037] refer to Figures 1 to 6 The energy storage converter includes: The enclosure 10 has a receiving cavity inside; the receiving cavity includes a high-pressure chamber 121. Functional devices 20, multiple functional devices 20 are arranged inside the high-voltage chamber 121; At least some of the functional components 20 are equipped with mounting bases 30, and the mounting bases 30 are detachably connected to the bottom plate 11 of the housing 10; adjacent functional components 20 are electrically connected to each other through electrical connectors 40; the electrical connectors are detachably connected to the functional components 20.

[0038] In this embodiment, by configuring independent mounting bases for functional components within the high-voltage enclosure and detachably connecting these bases to the enclosure's base plate, each functional component can be independently mounted on the base plate in a modular fashion. This allows for flexible selection and replacement of functional components with corresponding performance parameters based on the performance requirements of different projects or products, without requiring a complete redesign of the enclosure. This significantly shortens the product design and production cycles and reduces production costs. Furthermore, adjacent functional components are electrically connected via detachable electrical connectors. When a component needs replacement or repair, it can be removed simply by disconnecting its mounting base and the corresponding electrical connectors, without affecting the installation status of other functional components. This improves the maintainability and maintenance efficiency of the energy storage converter. In addition, the modular installation method allows the energy storage converter to adapt to fixed wiring routes and fixed test platforms, achieving plug-and-play functionality and further reducing labor costs.

[0039] The embodiments of this application will be described in more detail below with reference to the accompanying drawings.

[0040] like Figure 1 , Figure 2 , Figure 3 As shown, Figure 1 This is a schematic diagram of the structure of an energy storage converter provided in one embodiment of this application. Figure 2 This is a schematic diagram of the upper structure of an energy storage converter provided in one embodiment of this application. Figure 3This is a schematic diagram of the lower structure of an energy storage converter according to an embodiment of this application. The energy storage converter provided in this embodiment includes a housing 10, which has a receiving cavity inside. The housing 10 is the external shell structure of the energy storage converter, providing structural support and protection for various internal components. The bottom plate 11 of the housing 10 is horizontally positioned in the middle of the receiving cavity, dividing the receiving cavity vertically into an upper receiving cavity 12 and a lower receiving cavity 13. The energy storage converter has intersecting and perpendicular first directions X, second directions Y, and a vertical direction Z, wherein the vertical direction Z is the direction in which the upper receiving cavity 12 and the lower receiving cavity 13 are stacked.

[0041] In some embodiments, the material of the housing 10 may be at least one of aluminum alloy, steel, or composite material.

[0042] In some embodiments, the housing 10 is a one-piece structure, which helps to increase the overall structural stability of the housing 10. In other embodiments, the housing 10 can adopt a split structure, for example, including a bottom shell and a top cover. The bottom shell forms a receiving cavity, and the top cover closes the opening at the top of the bottom shell. The bottom shell and the top cover can be connected by bolts or snap-fit ​​connections to achieve a sealed assembly. The housing 10 can also adopt an enclosed structure spliced ​​from sheet metal, with each side of the housing 10 formed by splicing sheet metal pieces.

[0043] In some embodiments, the upper housing 12 includes a high-voltage chamber 121, a first chamber 122, and a second chamber 123. The high-voltage chamber 121 houses high-voltage functional devices 20 such as circuit breakers 21, fuses 22, relays 23, and a DC EMI board 24. The first chamber 122 contains an auxiliary power supply board 50, which provides power to the control circuits and auxiliary equipment inside the energy storage converter. The second chamber 123 contains an AC output board 60, which controls the AC power output of the energy storage converter.

[0044] It should be noted that the high-voltage chamber 121, the first chamber 122, and the second chamber 123 are divided by the functions of their respective components. Specifically, the area or space of the high-voltage chamber 121 corresponds to the high-voltage functional components 20 such as the circuit breaker 21, fuse 22, relay 23, and DC EMI board 24; the first chamber 122 corresponds to the auxiliary power supply board 50; and the second chamber 123 corresponds to the AC output board 60. In some embodiments, the high-voltage chamber 121, the first chamber 122, and the second chamber 123 are divided by partitions or other partitioning structures. The partitions can provide stable support for the functional components 20, the auxiliary power supply board 50, and the AC output board 60 within the high-voltage chamber 121, enabling the components to operate stably during the operation of the energy storage converter. In other embodiments, the high-voltage chamber 121, the first chamber 122, and the second chamber 123 do not have a clear regional division structure, which is not specifically limited here.

[0045] In some embodiments, a cooling fan 70, a heat sink 80, and an inductor 90 are sequentially arranged along the first direction X within the lower receiving cavity 13. The heat sink 80 has a finned heat dissipation structure and is thermally connected to the heat-generating components on the auxiliary power board 50 and / or the AC output board 60. That is, the heat generated by the power devices and other heat-generating components on the auxiliary power board 50 and / or the AC output board 60 can be transferred to the lower heat sink 80 for heat dissipation through the heat conduction path. The inductor 90 is an energy storage and filtering element in the power conversion circuit of the energy storage converter, and the inductor 90 is electrically connected to the auxiliary power board 50 and / or the AC output board 60.

[0046] This embodiment divides the housing 10 into a double-layer structure. The upper layer features a clearly defined functional area, including a high-voltage chamber 121, an auxiliary power supply board 50 area, and an AC output board 60 area. The lower layer houses a cooling fan 70, a heat sink 80, and an inductor 90, achieving functional zoning of each component and rational utilization of the space within the housing 10. The heat sink 80 is thermally conductively connected to the upper-layer heat-generating components, allowing the heat generated by the upper-layer components to be effectively conducted to the lower-layer heat sink 80 for dissipation, thus improving the overall heat dissipation efficiency and thermal management performance of the energy storage converter. Simultaneously, the inductor 90 is located within the lower housing 13, reducing the space occupied by the upper housing 12 and placing the inductor 90 along the path of the cooling airflow, which is beneficial for the inductor 90's own heat dissipation.

[0047] Reference Figure 2 As shown, multiple functional devices 20 are installed within the high-voltage enclosure 121. At least some of the functional devices 20 are equipped with mounting bases 30, which are detachably connected to the base plate 11 of the enclosure 10. Adjacent functional devices 20 are electrically connected via electrical connectors 40, which are detachably connected to the functional devices 20. The functional devices 20 are device units installed within the high-voltage enclosure 121 that perform functions such as electrical protection, electromagnetic compatibility, or signal control. The types and quantities of functional devices 20 can be selected and configured according to the specific power level and application scenario of the energy storage converter. The mounting bases 30 are structural components that support the functional devices 20 and are detachably connected to the base plate 11 of the enclosure 10. The installation of the mounting bases 30 allows each functional device 20 to be installed on the base plate 11 of the enclosure 10 as an independent module. Each functional device 20 can be replaced independently according to the performance requirements of different projects or products without requiring a complete redesign of the enclosure 10, thus achieving modular configuration of the devices within the high-voltage enclosure 121.

[0048] In some embodiments, the detachable connection between the mounting base 30 and the base plate 11 of the housing 10 may include at least one of screw connection, snap connection or pin connection.

[0049] In some embodiments, the electrical connector 40 is a conductive structural component that enables electrical conduction between adjacent functional devices 20. The electrical connector 40 is detachably connected to the functional device 20. When a functional device 20 needs to be replaced or repaired, it can be removed independently simply by disconnecting the corresponding mounting base 30 and the corresponding electrical connector 40, without affecting the installation status of other functional devices 20, thereby improving the maintainability and maintenance efficiency of the energy storage converter.

[0050] In some embodiments, the material of the electrical connector 40 includes at least one of copper, copper alloy, or aluminum. The detachable connection between the electrical connector 40 and the functional device 20 can be a screw connection.

[0051] like Figure 4 As shown, Figure 4 This is a top view of the upper structure of an energy storage converter provided in one embodiment of this application. The functional components 20 housed in the high-voltage compartment 121 include a circuit breaker 21, a fuse 22, a relay 23, and a DC EMI board 24. The circuit breaker 21 is used to disconnect the circuit when abnormal conditions such as overcurrent or short circuit occur, thereby protecting the electrical system of the energy storage converter. The fuse 22 is used to switch the circuit on and off under the drive of a control signal. The relay 23 is used to disconnect the circuit by melting itself when the current exceeds the rated value, thereby protecting the safety of downstream circuits and devices. The DC EMI board 24 is used to filter and suppress electromagnetic interference signals on the DC side, thereby ensuring the electromagnetic compatibility performance of the energy storage converter.

[0052] In some embodiments, circuit breaker 21, fuse 22, relay 23, and DC EMI board 24 are electrically connected in sequence via electrical connector 40. The circuit breaker 21, fuse 22, relay 23, and DC EMI board 24 within the high-voltage compartment 121 are connected in series along the current flow path, forming a complete DC-side electrical topology. The end of circuit breaker 21 closest to the rear of the enclosure 10 is electrically connected to the access terminal 15 at the rear of the enclosure 10 via electrical connector 40. Access terminal 15 serves as the electrical interface between the energy storage converter and the external DC power supply. The end of circuit breaker 21 furthest from access terminal 15 is electrically connected to fuse 22 via electrical connector 40. Fuse 22 and relay 23 are stacked in the vertical Z direction and electrically connected via electrical connector 40. The end of the DC EMI board 24 closest to the fuse 22 and relay 23 is electrically connected to the relay 23 via an electrical connector 40, while the end of the DC EMI board 24 furthest from the fuse 22 is electrically connected to the auxiliary power supply board 50 via the same connector 40. Thus, after DC current enters from the input terminal 15 at the rear of the enclosure 10, it is sequentially processed by the circuit breaker 21, fuse 22, relay 23, and DC EMI board 24 before being transmitted to the auxiliary power supply board 50, achieving a complete DC-side electrical path and constructing the electrical architecture of the energy storage converter. This series topology clearly defines the path of current flow through each device, which is beneficial for the standardized design and modular assembly and testing of the energy storage converter's electrical system.

[0053] It should be noted that the arrangement order of circuit breaker 21, fuse 22, relay 23, and DC EMI board 24 can be adjusted according to electrical design requirements. In this embodiment, circuit breaker 21 is located at the end near the terminal 15 at the rear of the enclosure 10, DC EMI board 24 is located at the end near the auxiliary power supply board 50, and fuse 22 and relay 23 are located between circuit breaker 21 and DC EMI board 24.

[0054] In some embodiments, the enclosure 10 is further provided with input terminals and output terminals, which can be located on the same end face of the enclosure 10 to facilitate cable connection between the energy storage converter and the external power grid, photovoltaic base station, or battery pack. The functional components 20 within the high-voltage compartment 121 are positioned close to the input terminals, which reduces the current transmission path between the input terminals and the functional components 20, facilitating electrical connection.

[0055] like Figure 5 , Figure 6 As shown, Figure 5 and Figure 6The diagrams show the structural schematics of the functional device 20 in an energy storage converter according to an embodiment of this application from different perspectives. The fuse 22 and relay 23 are integrated on the same mounting base 30. The fuse 22 is stacked vertically (Z-axis) above the relay 23. The fuse 22 is supported and connected above the relay 23 via an electrical connector 40 and a support member 32. The relay 23 is electrically connected to the fuse 22 via the electrical connector 40. The circuit breaker 21 and the DC EMI board 24 are respectively mounted on their own independent mounting bases 30, while the fuse 22 and relay 23 share the same mounting base 30, forming an integrated module. In this integrated module, the relay 23 is mounted on the mounting base 30, and the fuse 22 is stacked vertically (Z-axis) above the relay 23. That is, the relay 23 and fuse 22 do not occupy horizontal space but form a stacked spatial layout in the vertical (Z-axis).

[0056] The relay 23 is supported and connected above the fuse 22 via the electrical connector 40. The electrical connector 40 not only provides electrical continuity between the relay 23 and the fuse 22, but also serves as a mechanical support structure for the relay 23, fixing it above the fuse 22. The electrical connector 40 simultaneously achieves both electrical continuity and mechanical support, integrating the support structure and the conductive path for reuse. This reduces the number of independent structural components within the high-voltage enclosure 121, simplifies the assembly process, and lowers assembly complexity.

[0057] The fuse 22 and relay 23 are integrated on the same mounting base 30 and stacked vertically in a Z-shape. This improves the integration level within the high-voltage enclosure 121 and reduces the horizontal space occupied by the fuse 22 and relay 23, thus reducing the overall volume of the high-voltage enclosure 121. Furthermore, when replacing the fuse 22 or relay 23, the integrated module can be removed and replaced as a whole from the base plate 11 of the enclosure 10, further enhancing the convenience of modular replacement.

[0058] In some embodiments, one end of the fuse 22 located at the top is electrically connected to the circuit breaker 21 via an electrical connector 40, and the other end is electrically connected to the relay 23 located below it via an electrical connector 40. The other end of the relay 23 located below is electrically connected to the DC EMI board 24 via an electrical connector 40.

[0059] In some embodiments, the fuse 22 and the relay 23 are spaced apart in the vertical direction Z; an insulating gap is formed between the fuse 22 and the relay 23 in the vertical direction Z. In other words, although the fuse 22 and the relay 23 are stacked along the vertical direction Z, they are not tightly fitted together, but maintain a certain distance in the vertical direction Z, forming an insulating gap between the fuse 22 and the relay 23. The size of this insulating gap meets the electrical clearance requirements of safety regulations, ensuring that no discharge breakdown occurs between the fuse 22 and the relay 23 under high-voltage operating conditions. By using an air gap to achieve insulation isolation, there is no need to install additional insulating heat insulation boards or other insulating components between the relay 23 and the fuse 22, which simplifies the structure and reduces material and assembly costs while ensuring electrical safety.

[0060] In some embodiments, the size of the insulation gap can be set according to the operating voltage level and safety standards of the energy storage converter.

[0061] In some embodiments, the insulation gap between the fuse 22 and the relay 23 in the vertical direction Z is 5mm to 20mm. This embodiment sets the insulation gap to 5mm to 20mm to avoid insufficient creepage distance between the fuse 22 and the relay 23 due to an excessively small gap, which could lead to a risk of discharge breakdown under high-voltage operating conditions. Conversely, it avoids an excessively large insulation gap, which would increase the overall height of the integrated module of the fuse 22 and the relay 23 in the vertical direction Z, occupying too much space in the upper cavity 12. The insulation gap size setting in this embodiment balances electrical safety and space utilization.

[0062] In some embodiments, the mounting base 30 and electrical connector 40 spaced apart in the vertical direction Z are supported and connected by a support member 32, as are the electrical connector 40 at the input end and the output end of the functional device 20. The support member 32 is made of insulating material, which on the one hand avoids short-circuit connections between electrical connectors 40 or between electrical connectors 40 and other structures, and ensures the size of the insulation gap, thereby improving electrical safety performance. On the other hand, the support member 32 plays a supporting role between the fuse 22 and the relay 23 stacked in the vertical direction Z, realizing the stacking of the two in the vertical direction Z and reducing the space occupied by the fuse 22 and the relay 23 in the horizontal direction.

[0063] Continue to refer to Figure 5 and Figure 6Each mounting base 30 has an outwardly extending mounting portion 31 on its periphery. The mounting portion 31 has a fastening hole 311. The mounting base 30 is detachably connected to the base plate 11 of the housing 10 via fasteners passing through the fastening holes 311. The mounting portion 31 is formed by the outward extension of the periphery of the mounting base 30. The mounting portion 31 is a flange structure extending horizontally outward from the edge of the main body of the mounting base 30. The fastening hole 311 is a through hole penetrating the mounting portion 31. Fasteners pass through the fastening holes 311 and are screwed into corresponding screw holes on the base plate 11 of the housing 10, thereby achieving a detachable screwed connection between the mounting base 30 and the base plate 11 of the housing 10. By providing a mounting part 31 with fastening holes 311 around the periphery of the mounting base 30, the disassembly and assembly of the functional device 20 is simple and quick. Maintenance personnel only need to tighten the fasteners to complete the connection or separation between the mounting base 30 and the bottom plate 11 of the housing 10, which further improves the efficiency of modular replacement.

[0064] In some embodiments, the fastener may be a bolt or a screw. The mounting portion 31 may be provided at multiple locations around the mounting base 30, such as the four corners of the mounting base 30, to ensure the stability of the mounting base 30 on the base plate 11 of the housing 10.

[0065] In some embodiments, the mounting base 30 is further provided with heat dissipation holes and / or heat dissipation slots. The heat dissipation holes and heat dissipation slots can increase the airflow around the mounting base 30, improve the heat dissipation effect on the functional device 20, and prevent the functional device 20 from affecting normal operation due to excessive temperature.

[0066] In some embodiments, the mounting base 30 may be made of a metallic material or an insulating material. When the mounting base 30 is made of a metallic material, it may also serve as a grounding path for the functional device 20. When the mounting base 30 is made of an insulating material, it may provide additional insulation between the functional device 20 and the base plate 11 of the housing 10.

[0067] Continue to refer to Figure 5 and Figure 6 The electrical connectors 40 between adjacent functional devices 20 include a positive electrical connector and a negative electrical connector, which are respectively connected to the corresponding polarity terminals of the adjacent functional devices 20. Within the high-voltage chamber 121, the electrical connectors 40 between adjacent functional devices 20 are arranged in pairs, each pair including a positive electrical connector and a negative electrical connector. The two ends of the positive electrical connector are respectively connected to the positive terminals of two adjacent functional devices 20, and the two ends of the negative electrical connector are respectively connected to the negative terminals of two adjacent functional devices 20.

[0068] In some embodiments, the electrical connector 40 is a copper busbar structure, with the positive and negative electrical connectors marked with different colors to distinguish polarity. For example, a red copper busbar represents either the positive or negative terminal, and a yellow copper busbar represents the other. This allows installers to quickly identify the polarity and make correct connections based on the color markings of the copper busbars during installation, avoiding the risk of wiring errors and improving the reliability of electrical connections and the standardization of assembly.

[0069] In some embodiments, the connection between the electrical connector 40 and the functional device 20 can be fixed by means of screw connection or snap connection, etc., and can be separated by turning the screw during disassembly, thus ensuring the detachable feature.

[0070] Reference Figure 3 As shown, a cooling fan 70, a heat sink 80, and an inductor 90 are sequentially arranged along the first direction X inside the lower receiving cavity 13. The cooling fan 70 is used to drive airflow within the lower receiving cavity 13 to achieve forced air cooling. The heat sink 80 has mounting bases 81 at both ends in the second direction Y. The mounting bases 81 are fixedly connected to the housing 10, and the heat sink 80 is detachably connected to the housing 10 through the mounting bases 81.

[0071] In some embodiments, the radiator 80 includes a plurality of heat dissipation fins extending along a first direction X and spaced apart sequentially along a second direction Y. Heat dissipation gaps are formed between adjacent heat dissipation fins to allow gas flowing along the first direction X to pass through and exchange heat with the fins, thus achieving heat dissipation. The radiator 80 has mounting seats 81 at both ends in the second direction Y. The mounting seats 81 are structural components located at both ends of the radiator 80 and are fixedly connected to the side plates 14 or bottom plates 11 of the housing 10. The radiator 80 is detachably connected to the housing 10 via the mounting seats 81 at both ends. The radiator 80 is not directly fixed to the bottom plate 11 of the housing 10, but is indirectly installed via the mounting seats 81, achieving modular installation of the radiator 80. When it is necessary to replace the radiator 80 with one of different heat dissipation capacities to adapt to the needs of products with different power levels, the radiator 80, along with the mounting seats 81, can be removed from the housing 10 and replaced, improving the versatility and adaptability of the heat dissipation module. The fixing seat 81 can also support the connection between the bottom plate 11 and the outer plate of the box 10, thereby improving the overall structural strength of the box 10.

[0072] In some embodiments, the radiator 80 is made of a material with good thermal conductivity, such as copper, aluminum, or other metal materials. The radiator 80 includes a plurality of heat dissipation fins, which extend along a first direction X and are arranged sequentially at intervals along a second direction Y. Heat dissipation gaps are formed between adjacent heat dissipation fins to allow gas flowing along the first direction X to pass through and exchange heat with the heat dissipation fins to achieve heat dissipation.

[0073] In some embodiments, the mounting base 81 has a recessed structure on the side facing the outside of the housing 10, which forms a handle to facilitate the operator to carry and move the energy storage converter housing 10 as a whole.

[0074] In some embodiments, the number of inductors 90 can be adjusted according to actual needs, for example, different numbers of inductors 90 can be set according to the power level of the energy storage converter.

[0075] In some embodiments, a cooling fan 70 is disposed at one end of the lower receiving cavity 13 in the first direction X, and the cooling fan 70 is correspondingly disposed with respect to the high-voltage chamber 121. The cooling fan 70 draws in air from outside the housing 10, and the air passes through the radiator 80 and the inductor 90 for heat exchange in sequence, and is then discharged from the exhaust hole on the side plate 14 of the housing 10 on the side of the inductor 90. The cooling fan 70 is disposed at one end of the lower receiving cavity 13 along the first direction X, and this end is correspondingly disposed with respect to the high-voltage chamber 121 in the upper receiving cavity 12 in the vertical direction Z, that is, the cooling fan 70 is located in the area below the high-voltage chamber 121 in the housing 10. Cooling fan 70 draws in cool air from the external environment at the rear of the enclosure 10. After entering the lower receiving cavity 13, the cool air first flows through the fin structure of the radiator 80, exchanging heat with it and absorbing the heat conducted from the upper auxiliary power board 50 and / or AC output board 60 to the radiator 80. Then, the air continues to flow along the first direction X through the inductor 90, exchanging heat with it and absorbing the heat generated during its operation. Finally, the hot air, having completed heat exchange, is exhausted to the external environment through the exhaust vent on the side panel 14 of the enclosure 10 on the side of the inductor 90. This cooling duct forms a complete heat dissipation path, drawing in cool air from outside the enclosure 10, sequentially exchanging heat with the radiator 80 and inductor 90, and finally exhausting it from the side panel 14 of the enclosure 10. This achieves directional forced air cooling of the radiator 80 and inductor 90, improving heat dissipation efficiency and uniformity.

[0076] In some embodiments, the number of cooling fans 70 can be multiple. The multiple cooling fans 70 are arranged along the second direction Y to ensure sufficient airflow for the generated cooling air, allowing sufficient cold air from outside the housing 10 to enter the lower receiving cavity 13, forming a cooling airflow with adequate heat dissipation effect. The multiple cooling fans 70 can be arranged along the cross-section of the lower receiving cavity 13, serving to generate airflow throughout the entire second direction Y of the lower receiving cavity 13. Exemplarily, the number of cooling fans 70 can be three, four, five, or six.

[0077] In some embodiments, a vent 111 is provided on the base plate 11 to connect the high-pressure chamber 121 and the lower receiving cavity 13; the cooling fan 70 has an air inlet side and an air outlet side opposite to each other in the first direction X, and the vent 111 is provided on the air outlet side of the cooling fan 70. Specifically, the vent 111 is a through-hole structure that penetrates the base plate 11, connecting the upper high-pressure chamber 121 and the lower receiving cavity 13. The vent 111 is located in the area of ​​the base plate 11 corresponding to the air outlet side of the cooling fan 70, that is, the vent 111 is located directly above the base plate 11 in the air outlet direction of the cooling fan 70. Thus, some of the airflow generated by the cooling fan 70 can enter the upper high-voltage chamber 121 from the lower housing cavity 13 through the vent 111 for heat exchange, providing auxiliary heat dissipation for the functional components 20 in the high-voltage chamber 121, realizing heat exchange between the upper and lower housing cavities 13, and further improving the overall heat dissipation effect of the energy storage converter.

[0078] In some embodiments, a filter structure is provided at the vent 111. The filter structure can be at least one of a filter screen or filter cotton. By providing the filter structure, the airflow entering the upper high-voltage chamber 121 from the lower receiving cavity 13 can be effectively filtered, reducing the possibility of foreign objects entering the high-voltage chamber 121, ensuring the continuous and stable operation of the energy storage converter, and improving the reliability and safety of the energy storage converter in actual use. Optionally, the filter screen can be fixed to the surface of the base plate 11 with screws for easy periodic replacement and cleaning.

[0079] Reference Figure 2 , Figure 4 As shown, the upper receiving cavity 12 is further provided with a first cable management bracket 1011 extending along a first direction X and a second cable management bracket 1012 extending along a second direction Y. The first cable management bracket 1011 extends along the first direction X, and the second cable management bracket 1012 extends along the second direction Y, for example, perpendicular to each other. The first cable management bracket 1011 and the second cable management bracket 1012 together form a crisscrossing cable management frame 101, which is used to fix the cables inside the housing 10 to the cable management brackets, so that the cables are arranged in an orderly manner along the paths specified by the cable management brackets.

[0080] In this embodiment, the cable management framework 101 constrains all cables inside the enclosure 10, ensuring that all cables are drawn from the same predetermined location within the high-voltage chamber 121, thus preventing a chaotic distribution of cables within the enclosure 10. When replacing modular components within the high-voltage chamber 121, the fixed cable routing and exit points make cable removal, installation, and rewiring more convenient and orderly, avoiding increased complexity due to messy cables and further ensuring the feasibility of the modular design. Simultaneously, the standardized wiring allows the energy storage converter to adapt to a unified testing platform and fixtures, enabling plug-and-play testing functionality.

[0081] In some embodiments, the bottom surface of the mounting base 30 is provided with a positioning protrusion, and the bottom plate 11 of the housing 10 is provided with a positioning groove that mates with the positioning protrusion. The mounting base 30 is positioned and installed on the bottom plate 11 of the housing 10 through the engagement of the positioning protrusion and the positioning groove, and then fixedly connected by fasteners. The engagement of the positioning protrusion and the positioning groove enables the functional device 20 to be quickly and accurately aligned with the preset installation position on the bottom plate 11 of the housing 10 during installation, avoiding positional deviations during installation and improving the efficiency and consistency of modular assembly.

[0082] In some embodiments, the surface of the electrical connector 40 is provided with an insulating coating that covers the non-overlapping areas of the electrical connector 40, leaving conductive contact surfaces only in the overlapping areas between the electrical connector 40 and the terminals of the functional device 20. The insulating coating prevents short circuits caused by accidental contact between adjacent positive and negative electrical connectors, further improving the safety of electrical connections within the high-voltage chamber 121.

[0083] Accordingly, another embodiment of this application also provides an energy storage system, which includes an energy storage converter as described in any of the foregoing embodiments.

[0084] Energy storage systems are used to store electrical energy and release it when needed to achieve functions such as peak shaving and valley filling, frequency regulation, and backup power. Energy storage systems can be applied to grid-side energy storage, industrial and commercial energy storage, residential energy storage, and backup power for communication base stations.

[0085] In some embodiments, the energy storage system further includes a battery management system (BMS), an energy management system (EMS), and a battery pack. The battery management system monitors and manages the operating status of the battery pack, including parameters such as voltage, current, temperature, and state of charge. The energy management system schedules and manages the charging and discharging strategies of the energy storage system according to power demand. The energy storage converter, as the core device in the energy storage system that realizes the power conversion between DC and AC, works in conjunction with the battery management system and the energy management system to jointly complete the storage and release of electrical energy.

[0086] In some embodiments, the energy storage system includes, but is not limited to, residential energy storage cabinets, commercial energy storage cabinets, energy storage containers, energy storage racks, energy storage power stations, energy storage battery packs, or portable energy storage systems.

[0087] The energy storage system provided in this application adopts the energy storage converter of the aforementioned embodiment. The functional devices 20 in its high-voltage chamber 121 are installed in a modular form. The functional devices 20 with corresponding parameters can be flexibly configured and replaced according to the power level and performance requirements of different energy storage scenarios. This enables the energy storage system to quickly adapt to the needs of different projects, shorten the overall deployment cycle of the energy storage system, and reduce the system operation and maintenance costs.

[0088] The energy storage system provided in this application embodiment can be widely used in energy storage scenarios requiring high power conversion and flexible operation and maintenance. The energy storage system provided in this application embodiment can meet the needs of long-term energy storage, achieving long-term energy storage of 4 hours or more, for example, it can be applied to energy storage scenarios of 5 hours, 6 hours, 8 hours, etc. Long-term energy storage means being able to continuously discharge at rated power for 4 hours or even longer, or achieving large-scale, low-cost energy storage for several days or months.

[0089] Accordingly, another embodiment of this application also provides an electrical device that includes an energy storage converter as described in any of the foregoing embodiments.

[0090] Electrical devices refer to devices that use energy storage converters as the core power conversion equipment. Electrical devices can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0091] The electrical device provided in this application embodiment, by adopting the energy storage converter of the aforementioned embodiment, enables the power conversion module in the electrical device to have modular replacement capability. During the production and maintenance of the electrical device, the functional components 20 inside the energy storage converter can be quickly replaced according to different power requirements, thereby improving the production flexibility and after-sales maintenance efficiency of the electrical device.

[0092] Those skilled in the art will understand that the above embodiments are specific examples of implementing this application, and in practical applications, various changes in form and detail can be made without departing from the spirit and scope of this application. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this application; therefore, the scope of protection of this application should be determined by the scope defined in the claims.

Claims

1. An energy storage converter, characterized in that, include: The enclosure has a receiving cavity; the receiving cavity includes a high-pressure chamber. Functional devices, and a plurality of said functional devices are disposed in the high-voltage chamber; At least some of the functional devices are equipped with mounting bases, which are detachably connected to the bottom plate of the housing; adjacent functional devices are electrically connected via electrical connectors; and the electrical connectors are detachably connected to the functional devices.

2. The energy storage converter according to claim 1, characterized in that, The functional components include a circuit breaker, a fuse, a relay, and a DC EMI board; the relay and the fuse are integrated on the same mounting base, and the fuse is stacked vertically above the relay; the fuse is supported and connected above the relay through the electrical connector, and the fuse is electrically connected to the relay through the electrical connector.

3. The energy storage converter according to claim 2, characterized in that, The fuse and the relay are spaced apart in the vertical direction; an insulating gap is formed between the fuse and the relay in the vertical direction.

4. The energy storage converter according to claim 2, characterized in that, The circuit breaker, the fuse, the relay, and the DC EMI board are electrically connected in sequence through the electrical connector.

5. The energy storage converter according to claim 1, characterized in that, Each of the mounting bases has an outwardly extending mounting portion around its periphery, and the mounting portion has a fastening hole. The mounting base is detachably connected to the bottom plate of the housing by fasteners passing through the fastening holes.

6. The energy storage converter according to claim 1, characterized in that, The base plate divides the receiving cavity into an upper receiving cavity and a lower receiving cavity stacked vertically. The upper receiving cavity includes the high-voltage box chamber, a first chamber, and a second chamber. An auxiliary power supply board is provided in the first chamber. An AC output board is provided in the second chamber. A cooling fan, a heat sink, and an inductor are sequentially arranged along a first direction in the lower receiving cavity. The heat sink is thermally connected to the heat-generating components on the auxiliary power board and / or the AC output board, and the inductor is electrically connected to the auxiliary power board and / or the AC output board.

7. The energy storage converter according to claim 6, characterized in that, The radiator is provided with fixed seats at both ends in the second direction, and the fixed seats are detachably connected to the housing. The radiator is detachably connected to the housing through the fixed seats; the first direction and the second direction intersect.

8. The energy storage converter according to claim 6, characterized in that, The cooling fan is located at one end of the lower receiving cavity in the first direction, and the cooling fan is correspondingly arranged with the high-voltage chamber; the cooling fan draws in air from outside the chamber, and the air passes through the radiator and the inductor in sequence for heat exchange, and is discharged from the side plate of the chamber on the side of the inductor.

9. The energy storage converter according to claim 8, characterized in that, The base plate is provided with a vent hole that connects the high-pressure chamber and the lower receiving cavity; the cooling fan has an air inlet side and an air outlet side that are opposite to each other in the first direction, and the vent hole is located on the air outlet side of the cooling fan.

10. The energy storage converter according to claim 6, characterized in that, The upper cavity is further provided with a first cable management bracket extending along the first direction and a second cable management bracket extending along the second direction, the first direction and the second direction intersecting.

11. An energy storage system, characterized in that, Includes the energy storage converter as described in any one of claims 1 to 10.

12. An electrical appliance, characterized in that, Includes the energy storage converter as described in any one of claims 1 to 10.

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