An energy storage converter, an energy storage system and an electric device

Abstract

This application relates to the field of energy storage technology, and more particularly to an energy storage converter, an energy storage system, and an electrical device. The energy storage converter includes a housing, a shielding plate, a power module, and an absorbing module. The shielding plate is grounded, and the power module includes at least a power board and a switching transistor. The shielding plate divides the housing cavity enclosed by the housing into a first cavity and a second cavity. The power module is installed in the first cavity. The shielding plate can transfer at least a portion of the energy of the electromagnetic waves radiated outward by the power module to ground, thereby reducing interference from the energy storage converter to surrounding devices. The absorbing module installed in the first cavity has an absorbing cavity that communicates with the first cavity through an opening. At least a portion of the electromagnetic waves generated by the power module can enter the absorbing cavity through the opening. The electromagnetic waves are reflected multiple times by the absorbing module within the absorbing cavity, thereby consuming some of the electromagnetic wave energy. This also improves the electromagnetic shielding effect of the energy storage converter and reduces interference from the energy storage converter to surrounding devices.

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] An energy storage converter is a device in an energy storage system that performs bidirectional energy conversion, system control, and grid interaction. Internally, the energy storage converter contains a driver board, power board, and switching transistors. During operation, it controls the high-frequency switching of the switching transistors to convert the DC current from the battery device into a high-frequency square wave current, which is then filtered and output to discharge the battery device. Alternatively, the energy storage converter can rectify AC power into DC power by controlling the high-frequency switching of the switching transistors, and then output this DC power to the battery device to charge it.

[0003] When the high-frequency switching of the converter transistor generates a high-voltage current, the transmission of the high-voltage current will radiate electromagnetic waves to the outside world, making the devices around the energy storage converter more susceptible to electromagnetic interference. Summary of the Invention

[0004] This application provides an energy storage converter, an energy storage system, and an electrical device that can reduce electromagnetic interference from the energy storage converter to surrounding devices.

[0005] This application provides an energy storage converter, including a housing, a shielding plate, a power module, and an absorbing module. The housing forms a receiving cavity, and the shielding plate is installed inside the receiving cavity. The shielding plate divides the receiving cavity into a first cavity and a second cavity along a first direction, and the shielding plate is grounded. The power module is installed inside the first cavity, and the power module includes at least a power board and a switching transistor. The absorbing module installed inside the first cavity is located on the side of the power module away from the shielding plate along the first direction. The absorbing module includes an absorbing cavity, which communicates with the first cavity through an opening. Along the first direction, the opening is located on the side of the absorbing module facing the power module.

[0006] In this application, the power module operates at high power, and the flow of high voltage current radiates electromagnetic waves outward. When the electromagnetic waves are transmitted to the shielding plate, the shielding plate can transfer at least part of the energy of the electromagnetic waves to the ground, thereby reducing the energy of the electromagnetic waves radiated to the outside of the energy storage converter. This can improve the electromagnetic shielding effect of the energy storage converter, and thus reduce the interference of the energy storage converter to surrounding devices.

[0007] Furthermore, at least a portion of the electromagnetic waves generated by the power module can enter the absorbing cavity through the opening. The electromagnetic waves are reflected multiple times by the absorbing module within the absorbing cavity. When the electromagnetic waves are transmitted to the surface of the absorbing module within the absorbing cavity, the surface of the absorbing module can generate heat energy, thereby consuming some of the energy of the electromagnetic waves. Through multiple reflections of the electromagnetic waves within the absorbing cavity, the energy of the electromagnetic waves leaving the absorbing cavity can be reduced, thereby reducing the energy of the electromagnetic waves within the first cavity. This, in turn, reduces the energy of the electromagnetic waves radiated to the outside of the energy storage converter, improving the electromagnetic shielding effect of the energy storage converter and thus reducing the interference of the energy storage converter to surrounding devices.

[0008] In some possible designs, the absorbing module includes a substrate mounted on a housing. Along a first direction, a first side plate and a second side plate are disposed on the side of the substrate facing the power module. Along a second direction, the first side plate is connected to both sides of the substrate. Along a third direction, the second side plate is connected to both sides of the substrate. The absorbing module also includes a third side plate. Along the third direction, both sides of the third side plate are respectively connected to the second side plates on both sides. An opening is provided between the third side plate and the first side plate. The first side plate, the substrate, the second side plate, and the third side plate form an absorbing cavity.

[0009] In some possible designs, the end of the first side plate away from the substrate has a first guide portion that extends obliquely toward the power module and away from the substrate.

[0010] In some possible designs, the third side plate has a second guide portion at the end facing the first side plate. The second guide portion extends obliquely toward the first side plate and the substrate, and the second guide portion and the first side plate have a first gap in the second direction.

[0011] In some possible designs, the first guide portion and the second guide portion have openings in the first direction, and the size of the openings in the first direction is larger than the size of the first gap in the second direction.

[0012] In some possible designs, at least one first partition is connected to the substrate, the first partition is located inside the absorbing cavity, and the first partition and the third side plate are separated by a second gap in a first direction.

[0013] In some possible designs, the absorbing module also includes an absorbing element, at least a portion of which is located within the absorbing cavity.

[0014] In some possible designs, the shielding plate includes a metal substrate and an absorbing layer, which covers the surface of the metal substrate and is able to absorb some of the energy of electromagnetic waves.

[0015] In some possible designs, the shielding plate is provided with a first through hole, through which the first cavity and the second cavity are connected.

[0016] In some possible designs, the energy storage converter also includes a first blocking module, which includes at least a first drive motor and a first moving component, with the first drive motor connected to the first moving component. When the energy storage converter is in a first mode, the first drive motor can drive the first moving component to move away from the first through-hole, and the first moving component can open at least a portion of the first through-hole. When the energy storage converter is in a second mode, the first drive motor can drive the first moving component to move towards the first through-hole, and the first moving component can block at least a portion of the first through-hole.

[0017] In some possible designs, the energy storage converter also includes a controller and a heat dissipation module. The heat dissipation module is installed in the second cavity. The controller is electrically connected to the first drive motor and the heat dissipation module respectively. When the energy storage converter is in the second mode, the controller can improve the heat dissipation efficiency of the heat dissipation module.

[0018] In some possible designs, the power module also includes a capacitor, and the capacitor and the switching transistor connected in parallel with the capacitor are all mounted on the same power board.

[0019] In some possible designs, along the fourth direction, switching transistors are placed on both sides of the capacitor, and the capacitor is connected in parallel with the switching transistors on both sides.

[0020] In some possible designs, the energy storage converter also includes a drive board that is plugged into the power board. The drive board is connected in series with the switching transistor and the capacitor, respectively, and is located between the switching transistor and the capacitor along the fourth direction.

[0021] In some possible designs, a driver board is connected in series with at least two switching transistors, and the switching transistors connected in series with the same driver board are arranged along the fifth direction, which is perpendicular to the fourth direction.

[0022] A second aspect of this application provides an energy storage system, which includes a battery device and an energy storage converter as described in any of the above claims, wherein the battery device is electrically connected to the energy storage converter.

[0023] In this application, the power module operates at high power, and the flow of high voltage current radiates electromagnetic waves outward. When the electromagnetic waves are transmitted to the shielding plate, the shielding plate can transfer at least part of the energy of the electromagnetic waves to the ground, thereby reducing the energy of the electromagnetic waves radiated to the outside of the energy storage converter. This can improve the electromagnetic shielding effect of the energy storage converter, and thus reduce the interference of the energy storage converter to surrounding devices.

[0024] A third aspect of this application provides an electrical device, which includes the energy storage converter described in any of the above claims.

[0025] In this application, the power module operates at high power, and the flow of high voltage current radiates electromagnetic waves outward. When the electromagnetic waves are transmitted to the shielding plate, the shielding plate can transfer at least part of the energy of the electromagnetic waves to the ground, thereby reducing the energy of the electromagnetic waves radiated to the outside of the energy storage converter. This can improve the electromagnetic shielding effect of the energy storage converter, and thus reduce the interference of the energy storage converter to surrounding devices. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, 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.

[0027] Figure 1 Schematic diagrams of the energy storage converter provided in this application in some embodiments;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure of the first shell component in some embodiments;

[0029] Figure 3 for Figure 1 Cross-sectional views of the energy storage converter in some embodiments;

[0030] Figure 4 for Figure 1 A cross-sectional view of the energy storage converter in some other embodiments;

[0031] Figure 5 A cross-sectional view of the first cavity of the energy storage converter in some embodiments;

[0032] Figure 6 for Figure 5 A schematic diagram of the structure of the absorbing module and power board in some embodiments;

[0033] Figure 7 for Figure 5 A schematic diagram of the structure of the wave-absorbing module in some embodiments;

[0034] Figure 8 for Figure 7 Cross-sectional view of the microwave absorbing module in some instances;

[0035] Figure 9 for Figure 7 Enlarged schematic diagram of part A in some embodiments;

[0036] Figure 10 for Figure 8 Enlarged schematic diagram of part B in some embodiments;

[0037] Figure 11 for Figure 8 Enlarged schematic diagram of part B in other embodiments;

[0038] Figure 12 for Figure 7 Enlarged schematic diagram of part A in some other embodiments;

[0039] Figure 13 for Figure 8 Enlarged schematic diagram of part B in some other embodiments;

[0040] Figure 14 for Figure 6 The diagram shows the structure of the power module in some embodiments.

[0041] Figure label:

[0042] 10-Outer shell; 101-Receiving cavity; 1011-First cavity; 1012-Second cavity;

[0043] 1-Top cover; 2-First housing component; 3-Second housing component; 31-Second through hole; 4-Shielding plate; 41-First through hole;

[0044] 5-Absorbing module; 51-Absorbing cavity; 52-Opening; 53-Substrate; 531-First partition; 532-Second gap; 54-First side plate; 541-First guide portion; 55-Second side plate; 56-Third side plate; 561-Second guide portion; 562-First gap; 563-Second partition; 564-Third gap;

[0045] 20-Power module; 201-Power board; 202-Switching transistor; 203-Heat sink; 204-Capacitor; 205-Driver board;

[0046] Z - First direction; X - Second direction; Y - Third direction; K - Fourth direction; T - Fifth direction. Detailed Implementation

[0047] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0048] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0049] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0050] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0051] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0052] Firstly, this application provides some embodiments of energy storage converters, relating to the field of energy storage technology. In some embodiments, an energy storage converter (Power Conversion System, PCS) is a device in an energy storage system that performs functions such as bidirectional energy conversion, system control, and grid interaction. The energy storage converter can convert alternating current (AC) output from the grid or photovoltaic base station into direct current (DC). An energy storage battery device can store the DC electrical energy. The energy storage converter can also convert the DC output from the energy storage battery device into AC power that meets grid requirements or AC power required by electrical equipment.

[0053] For example, an energy storage converter contains components such as a driver board, power board, and switching transistors. During operation, the converter controls the high-frequency switching of the switching transistors to convert the DC current of the battery device into a high-frequency square wave current, which is then filtered and output to discharge the battery device. Alternatively, the converter can rectify the AC power into DC power by controlling the high-frequency switching of the switching transistors, and then output the DC power to the battery device to charge it.

[0054] Figure 1 This is a schematic diagram of the structure of an energy storage converter in some embodiments. For example... Figure 1As shown, the energy storage converter includes a housing 10, which encloses a cavity. A power module and a heat dissipation module are installed within the cavity. The power module includes at least a power board and switching transistors, while the heat dissipation module includes at least a fan. The heat dissipation module directs external air to the power module for heat dissipation. The housing 10 has multiple interfaces, through which power lines, transmission lines, etc., can be electrically connected to the internal components of the energy storage converter. Electrical connection means that the energy storage converter can transmit current after being powered on or operating.

[0055] In some embodiments, the housing 10 can be a one-piece structure, which can increase the overall structural stability of the housing 10.

[0056] In other embodiments, such as Figure 1 As shown, the outer casing 10 includes an upper cover 1, a first shell member 2, and a second shell member 3 arranged along a first direction Z. The first shell member 2 is connected to the upper cover 1 and the second shell member 3 on both sides along the first direction Z, respectively. The upper cover 1, the first shell member 2, and the second shell member 3 are connected by welding, bonding, riveting, fastener connection, snap-fit, etc., and together form the aforementioned receiving cavity. In this embodiment, the connection method of the upper cover 1, the first shell member 2, and the second shell member 3 is not particularly limited. The first direction Z can be parallel to the height direction of the energy storage converter, or it can be parallel to the length direction or the width direction of the energy storage converter. In this embodiment, the first direction Z being parallel to the height direction of the energy storage converter is used as an example for explanation.

[0057] In this embodiment, the outer shell 10 is configured as a split upper cover 1, a first shell 2, and a second shell 3, so that the upper cover 1, the first shell 2, and the second shell 3 can be processed separately, which can reduce the processing cost of the outer shell 10.

[0058] Figure 2 for Figure 1 A schematic diagram of the structure of the first shell component in some embodiments. Figure 3 for Figure 1 The energy storage converter in some embodiments is shown in the structural cross-sectional view. For example... Figure 2 and Figure 3 As shown, the energy storage converter also includes a shielding plate 4, which is connected to either the first housing 2 or the second housing 3. Figure 2 and Figure 3The example illustrates the connection between the shielding plate 4 and the first housing 2. The shielding plate 4 divides the receiving cavity 101 into a first cavity 1011 and a second cavity 1012 arranged along the first direction Z. The shielding plate 4 is made of a conductive material, such as metal or metal alloy, and is grounded. The power module 20 is installed in the first cavity 1011. For example, a switching transistor 202 is electrically connected to the power board 201. The power board 201 can be installed on the top cover 1, the first housing 2, or the shielding plate 4.

[0059] In this embodiment, the power module 20 operates in a high-power state, and the flow of high-voltage current will radiate electromagnetic waves outward. When the electromagnetic waves are transmitted to the shielding plate 4, the shielding plate 4 can transmit at least part of the energy of the electromagnetic waves to the ground, thereby reducing the energy of the electromagnetic waves radiated to the outside of the energy storage converter, which can improve the electromagnetic shielding effect of the energy storage converter, and thus reduce the interference of the energy storage converter to surrounding devices.

[0060] The shielding plate 4 and the first shell 2 can be separate structures, and then connected by means of bonding, welding, riveting, snap-fitting, fastener connection, etc. The shielding plate 4 and the first shell 2 can also be integrally formed, which can improve the connection stability between the shielding plate 4 and the first shell 2.

[0061] Figure 3 The example illustrates that the shielding plate 4 and the first housing 2 can be a separate structure.

[0062] Figure 4 for Figure 1 A cross-sectional view of the energy storage converter in some other embodiments. Figure 4 The example illustrates a structure in which the shielding plate 4 and the first shell 2 are integrally formed.

[0063] Figure 5 A cross-sectional view of the first cavity of the energy storage converter in some embodiments, such as... Figure 5 As shown, the energy storage converter also includes an absorbing module 5 installed inside the first cavity 1011. Figure 6 for Figure 5 The diagram shows the structure of the absorbing module and power board in some embodiments. For example... Figure 5 and Figure 6 As shown, along the first direction Z, the absorbing module 5 is located on the side of the power module 20 away from the shielding plate 4. The absorbing module 5 includes an absorbing cavity 51, which is connected to the first cavity 1011 through an opening 52. Along the first direction Z, the opening 52 is located on the side of the absorbing module 5 facing the power module 20.

[0064] In this embodiment, at least a portion of the electromagnetic waves generated by the power module 20 can enter the absorbing cavity 51 through the opening 52. The electromagnetic waves are reflected multiple times by the absorbing module 5 within the absorbing cavity 51. When the electromagnetic waves are transmitted to the surface of the absorbing module 5 within the absorbing cavity 51, the surface of the absorbing module 5 can generate heat energy, thereby consuming part of the energy of the electromagnetic waves. Through multiple reflections of the electromagnetic waves within the absorbing cavity 51, the energy of the electromagnetic waves leaving the absorbing cavity 51 can be reduced, thereby reducing the energy of the electromagnetic waves within the first cavity 1011. This, in turn, reduces the energy of the electromagnetic waves radiated to the outside of the energy storage converter, improves the electromagnetic shielding effect of the energy storage converter, and further reduces the interference of the energy storage converter to surrounding devices.

[0065] Figure 7 for Figure 5 A schematic diagram of the structure of the wave-absorbing module in some embodiments. Figure 8 for Figure 7 The absorbing module in the image is shown in cross-sectional views in some instances. For example... Figure 7 and Figure 8 As shown, the microwave absorbing module 5 includes a substrate 53 mounted on the housing 10. Along the first direction Z, a first side plate 54 and a second side plate 55 are provided on the side of the substrate 53 facing the power module 20. Along the second direction X, the first side plate 54 is connected to both sides of the substrate 53. Along the third direction Y, the second side plate 55 is connected to both sides of the substrate 53. The microwave absorbing module 5 also includes a third side plate 56. Along the third direction Y, both sides of the third side plate 56 are connected to the second side plates 55 on both sides. An opening 52 is left between the third side plate 56 and the first side plate 54. The first side plate 54, the substrate 53, the second side plate 55 and the third side plate 56 form an absorbing cavity 51.

[0066] Wherein, the second direction X and the third direction Y are both perpendicular to the first direction Z. The second direction X intersects the third direction Y. For example, the second direction X is perpendicular to the third direction Y. The second direction X is parallel to the width direction of the energy storage converter, and the third direction Y is parallel to the length direction of the energy storage converter. Alternatively, the second direction X is parallel to the length direction of the energy storage converter, and the third direction Y is parallel to the width direction of the energy storage converter.

[0067] The substrate 53 can be mounted on the top cover 1, the first housing 2, or the shielding plate 4.

[0068] When the substrate 53 is installed on the upper cover 1, the substrate 53 can be connected and fixed to the upper cover 1 by means of bonding, riveting, welding, snap-fitting, fastener connection, etc. Alternatively, the outer shell 10 is also provided with a bracket, and the substrate 53 is fixed to the bracket by means of bonding, riveting, welding, snap-fitting, fastener connection, etc. The bracket is fixed to the upper cover 1 by means of bonding, riveting, welding, snap-fitting, fastener connection, etc.

[0069] When the substrate 53 is installed on the first housing 2, the substrate 53 can be connected and fixed to the first housing 2 by means of bonding, riveting, welding, snap-fitting, fastener connection, etc. Alternatively, the housing 10 is also provided with a bracket, and the substrate 53 is fixed to the bracket by means of bonding, riveting, welding, snap-fitting, fastener connection, etc. The bracket is fixed to the first housing 2 by means of bonding, riveting, welding, snap-fitting, fastener connection, etc.

[0070] When the substrate 53 is installed on the shielding plate 4, the outer shell 10 is also provided with a bracket. The substrate 53 is fixed on the bracket by means of bonding, riveting, welding, snap-fitting, fastener connection, etc., and the bracket is fixed on the shielding plate 4 by means of bonding, riveting, welding, snap-fitting, fastener connection, etc.

[0071] The above are merely examples of the mounting position and mounting method of the substrate 53. The embodiments of this application do not impose any special limitations on the specific mounting position, mounting method, mounting structure, etc. of the substrate 53.

[0072] Figure 9 for Figure 7 Enlarged schematic diagram of part A in some embodiments. Figure 10 for Figure 8 Enlarged schematic diagram of part B in some embodiments, such as Figure 9 and Figure 10 As shown, the first side plate 54 has a first guide portion 541 at the end away from the substrate 53. The first guide portion 541 extends obliquely in the direction close to the power module 20 and away from the substrate 53. That is, the end of the first side plate 54 away from the substrate 53 is bent into a V-shaped structure, thereby forming an obtuse-angle flange that can guide the flow.

[0073] In this embodiment, the gap between the first guide portion 541 and the third side plate 56 forms an opening 52. The inclined extension of the first guide portion 541 allows the opening 52 to have a larger size, thereby reducing the difficulty for the electromagnetic waves generated by the power module 20 to enter the absorbing cavity 51, and thus improving the absorption effect of the absorbing module 5 on electromagnetic wave energy.

[0074] like Figure 9 and Figure 10 As shown, the third side plate 56 has a second guide portion 561 at one end facing the first side plate 54. The second guide portion 561 extends obliquely in a direction close to the first side plate 54 and the substrate 53, and the second guide portion 561 and the first side plate 54 have a first gap 562 in the second direction X.

[0075] In this embodiment, the second guide portion 561 can guide the electromagnetic wave to the first side plate 54, so that after the electromagnetic wave is reflected on at least one side of the first side plate 54, it enters the absorbing cavity 51 through the first gap 562. The reflection of the electromagnetic wave on the first side plate 54 will cause part of the energy of the electromagnetic wave to be converted into heat by the first side plate 54, thereby increasing the number of reflections of the electromagnetic wave in the absorbing module 5 and improving the absorption effect of the absorbing module 5 on the electromagnetic wave energy.

[0076] like Figure 9 and Figure 10 As shown, the first guide portion 541 and the second guide portion 561 have the aforementioned opening 52 in the first direction Z. Through the inclined extension of the second guide portion 561, the size of the opening 52 in the first direction Z is larger than the size of the first gap 562 in the second direction X.

[0077] In this embodiment, the second guide portion 561 can reduce the distance between the third side plate 56 and the first side plate 54, so that the size of the first gap 562 in the second direction X is smaller than the size of the opening 52 in the first direction Z. That is, electromagnetic waves can first enter the space between the first guide portion 541 and the second guide portion 561 through the larger opening 52, and then enter the absorbing cavity 51 through the smaller first gap 562. This horn-shaped structure with a large opening at one end and a small opening at the other end along the electromagnetic wave propagation path can confine the electromagnetic waves in the absorbing cavity 51, making it easier for electromagnetic waves in the first cavity 1011 to enter the absorbing cavity 51, and reducing the likelihood of electromagnetic waves leaving the absorbing cavity 51 and returning to the first cavity 1011, thereby improving the electromagnetic shielding effect of the absorbing module 5.

[0078] In some embodiments, the first guide portion 541 and the second guide portion 561 are parallel. By adjusting the distance between the first guide portion 541 and the second guide portion 561 in the first direction Z, as well as the extension length of the first guide portion 541 and the second guide portion 561, electromagnetic waves of a specific frequency band can enter the opening 52, while electromagnetic waves of other frequency bands are shielded outside the opening 52. This allows the absorbing module 5 to shield electromagnetic waves of a specific frequency band without affecting the transmission of electromagnetic waves of other frequency bands, reducing the risk of the absorbing module 5 absorbing electromagnetic waves that require wireless communication functions.

[0079] In other embodiments, the extension direction of the first guide portion 541 intersects the extension direction of the second guide portion 561, and the angle between the first guide portion 541 and the second direction X is greater than the angle between the second guide portion 561 and the second direction X, so that the first guide portion 541 and the second guide portion 561 form a trumpet-shaped opening 52. The trumpet-shaped opening 52 can reduce the reflection of electromagnetic waves at the opening 52, reduce the electromagnetic waves reflected at the opening 52 and leaving the wave-absorbing module 5, and allow more electromagnetic waves to enter the wave-absorbing cavity 51, thereby allowing more electromagnetic wave energy to enter the wave-absorbing cavity 51, which can improve the electromagnetic shielding effect of the wave-absorbing module 5.

[0080] Figure 11 for Figure 8 Enlarged schematic diagram of part B in other embodiments. For example... Figure 11 As shown, at least one first partition 531 is connected to the substrate 53. The first partition 531 is located inside the absorbing cavity 51. The first partition 531 and the third side plate 56 have a second gap 532 in the first direction Z.

[0081] In this embodiment, the first partition 531 divides the absorbing cavity 51 into multiple small cavities. When electromagnetic waves enter the absorbing cavity 51 through the opening 52, some of the electromagnetic waves can be reflected at the first partition 531. After being reflected by at least one of the substrate 53, the first side plate 54, the second guide portion 561, and the third side plate 56, this portion of the electromagnetic waves can enter the adjacent small cavity through the second gap 532. The first partition 531 can increase the number of reflections of electromagnetic waves in the absorbing cavity 51, thereby improving the absorption effect of the absorbing module 5 on electromagnetic wave energy.

[0082] When there are multiple first partitions 531, the first partitions 531 can be arranged along the second direction X or along the third direction Y. This application embodiment does not impose any special limitation on the arrangement of the first partitions 531.

[0083] When there are multiple first partitions 531, a portion of the first partitions 531 can be connected to the substrate 53, leaving a gap between the first partitions 531 and the third side plate 56. Alternatively, a portion of the first partitions 531 can be connected to the third side plate 56, leaving a gap between the first partitions 531 and the substrate 53.

[0084] When there are multiple first partitions 531, adjacent first partitions 531 can be parallel or not parallel.

[0085] Figure 12 for Figure 7 Enlarged schematic diagram of part A in some other embodiments. Figure 13 for Figure 8 Enlarged schematic diagram of part B in some other embodiments. For example... Figure 12and Figure 13 As shown, the second guide portion 561 may be connected to a second partition 563 at one end facing the first side plate 54. The second partition 563 extends toward the substrate 53, and a third gap 564 is left between the second partition 563 and the substrate 53.

[0086] In this embodiment, the second partition 563 can further increase the number of reflections of electromagnetic waves in the absorbing cavity 51, thereby improving the absorption effect of the absorbing module 5 on electromagnetic wave energy.

[0087] Based on the absorbing module 5 in any of the above embodiments, the absorbing module 5 further includes an absorbing element, at least a portion of which is located within the absorbing cavity 51.

[0088] In this embodiment, an absorbing element is provided in the absorbing cavity 51. When electromagnetic waves enter the absorbing cavity 51, in addition to the electromagnetic wave energy being reflected and absorbed by the substrate 53, the first side plate 54, the second side plate 55 and the third side plate 56, the absorbing element in the absorbing cavity 51 can also absorb the electromagnetic wave energy, thereby improving the absorption effect of the absorbing module 5 on electromagnetic wave energy.

[0089] In some embodiments, the surfaces of the substrate 53, the first side plate 54, the second side plate 55, and the third side plate 56 are covered with a microwave absorbing coating. The microwave absorbing coating is the microwave absorbing element described above. The microwave absorbing coating can be a ferrite coating, a magnetic metal micro powder coating, a conductive polymer coating, an indium tin oxide film, a metal mesh film, a silver nanowire coating, a graphene film, etc. The embodiments of this application do not impose any special limitations on the specific structure, type, or material of the microwave absorbing coating.

[0090] In other embodiments, the absorbing cavity 51 may be filled with absorbing material, which is the absorbing component described above. The absorbing material can support the absorbing module 5 and improve the overall structural strength of the absorbing module 5. The absorbing material can be carbon-impregnated / carbon-loaded polyurethane foam, carbon fiber composite material, graphene / carbon nanotube foam, etc. The absorbing material can also be ceramic matrix composite material such as barium titanate and silicon carbide. The embodiments of this application do not make any special limitations on the specific structure, type and material of the absorbing material.

[0091] The absorbing cavity 51 may be provided with only the above-mentioned absorbing coating, or it may be filled with only the above-mentioned absorbing material, or the absorbing cavity 51 may be filled with absorbing material while the absorbing coating is applied to the surface.

[0092] The shielding plate 4 may include a metal substrate and an absorbing layer. The metal substrate is grounded, and the absorbing layer covers the surface of the metal substrate. The absorbing layer can absorb part of the electromagnetic wave energy. The absorbing layer may be a ferrite coating, a magnetic metal powder coating, a conductive polymer coating, an indium tin oxide film, a metal mesh film, a silver nanowire coating, a graphene film, etc. The embodiments of this application do not impose any special limitations on the specific structure, type, or material of the absorbing coating.

[0093] In this embodiment, an absorbing layer is coated on the surface of the metal substrate. The absorbing layer can absorb the energy of electromagnetic waves reaching the surface of the shielding plate 4, reduce the energy of electromagnetic waves radiated to the outside of the energy storage converter, improve the electromagnetic shielding effect of the energy storage converter, and thus reduce the interference of the energy storage converter to surrounding devices.

[0094] The shielding plate 4 has a through hole that extends through the shielding plate 4 along its thickness direction. The metal substrate inside the shielding plate 4 can be exposed at the through hole. A conductive component is inserted into the through hole, with one end of the conductive component grounded and the other end in contact with the metal substrate, thereby achieving grounding of the metal substrate.

[0095] When the outer surface of the shielding plate 4 is coated with an absorbing layer, the grounding difficulty of the shielding plate 4 can be reduced through the combination of conductive components and through holes.

[0096] Conductive components can be screws, bolts, pins, etc., which can reduce the cost of conductive components.

[0097] When the shielding plate 4 and the first shell 2 are integrally formed, the metal substrate inside the shielding plate 4 and the first shell 2 are integrally formed. In this case, the through hole for grounding can be set on the first shell 2.

[0098] like Figure 2 As shown, the shielding plate 4 is provided with a first through hole 41, and the first cavity 1011 and the second cavity 1012 are connected through the first through hole 41.

[0099] When the power module 20 is working, the temperature of the power module 20 will rise. The first through hole 41 is opened on the shielding plate 4 so that the first cavity 1011 and the second cavity 1012 can exchange heat, which can reduce the temperature inside the first cavity 1011, thereby improving the heat dissipation efficiency of the power module 20.

[0100] The energy storage converter may further include a first blocking module, which includes at least a first drive motor and a first moving component. The first drive motor is connected to the first moving component and can control the movement of the first moving component. When the energy storage converter is in a first mode, the first drive motor can drive the first moving component to move away from the first through-hole 41, and the first moving component can open at least a portion of the first through-hole 41. When the energy storage converter is in a second mode, the first drive motor can drive the first moving component to move closer to the first through-hole 41, and the first moving component can block at least a portion of the first through-hole 41.

[0101] The direction of movement of the first moving component can be perpendicular to the first direction Z, the second direction X, or the third direction Y. This application embodiment does not impose any special limitation on the direction of movement of the first moving component. The first drive motor can drive the first moving component to move or drive the first moving component to rotate. This application embodiment does not impose any special limitation on the mode of movement of the first moving component.

[0102] In this embodiment, when the heat dissipation requirement of the power module 20 is high, the first drive motor can drive the first moving part to open at least part of the first through hole 41 to improve the heat dissipation efficiency of the power module 20, thereby improving the performance of the power module 20. When the power module 20 is in a high-power operating state, the electromagnetic waves radiated outward by the power module 20 are strong. At this time, the first drive motor can drive the first moving part to block at least part of the first through hole 41, reducing the risk of electromagnetic waves leaking to the second cavity 1012 at the first through hole 41, thereby reducing the risk of electromagnetic waves radiating outside the energy storage converter and improving the electromagnetic shielding effect of the energy storage converter.

[0103] In different modes, the number of first through holes 41 that are opened or blocked can be adjusted by the first shielding module, which can balance the heat dissipation requirements and electromagnetic shielding effect of the power module 20.

[0104] The diameter of the outer tangent circle of the first through hole 41 can be less than one-quarter of the wavelength of the electromagnetic wave radiated outward by the power module 20, which can reduce the risk of the electromagnetic wave radiated outward by the power module 20 passing through the first through hole 41, thereby improving the electromagnetic shielding effect of the shielding plate 4.

[0105] The energy storage converter also includes a heat dissipation module, which is installed inside the second cavity 1012, such as... Figure 3 As shown, heat dissipation fins 203 are connected to the power board 201, such as... Figure 1 As shown, the fan of the heat dissipation module can guide the low-temperature gas from the outside of the energy storage converter through the second through hole 31 on the second housing 3 to the heat dissipation fins 203, which can improve the heat dissipation efficiency of the power module 20.

[0106] The energy storage converter also includes a controller, which is electrically connected to the first drive motor and the heat dissipation module respectively. When the energy storage converter is in the second mode, the controller can improve the heat dissipation efficiency of the heat dissipation module, for example, by increasing the number of fans that are turned on or by increasing the fan speed.

[0107] In this embodiment, when the power module 20 is in a high-power operating state, the controller transmits a signal to the first drive motor, causing the first moving part to block at least part of the first through hole 41 to improve the electromagnetic shielding effect. The controller also transmits a signal to the heat dissipation module, thereby improving the efficiency of the heat dissipation module and meeting the heat dissipation requirements of the power module 20.

[0108] When the power module 20 is in a low-power operating state, the electromagnetic waves radiated by the power module 20 to the outside are weak. The heat dissipation requirements of the power module 20 can be met by opening the first through hole 41 and reducing the efficiency of the heat dissipation module, thereby reducing the energy consumption of the energy storage converter.

[0109] The controller can determine whether the power module 20 is in a low-power or high-power operating state based on the current of the power module 20, the switching frequency of the switching transistor 202, the temperature of the power module 20, and other factors.

[0110] like Figure 1 As shown, the second housing 3 has a second through hole 31 for heat dissipation. The energy storage converter may also include a second shielding module. The second shielding module includes at least a second drive motor and a second moving part. The second drive motor is connected to the second moving part and is connected to the controller. The second drive motor can control the movement of the second moving part.

[0111] When the energy storage converter is in the first mode, that is, when the power module 20 is in a low-power operation state, the second drive motor can drive the second moving part to move towards the second through hole 31. Under the premise of meeting the heat dissipation power of the heat dissipation module, the second moving part can block part of the second through hole 31, reducing the risk of electromagnetic waves leaking from the second through hole 31 to the outside of the energy storage converter.

[0112] When the energy storage converter is in the second mode, that is, when the power module 20 is in a high-power operating state, the second drive motor can drive the second moving part to move away from the second through hole 31. The second moving part can open more second through holes 31, thereby improving the heat dissipation power of the heat dissipation module.

[0113] Based on the energy storage converter in any of the above embodiments, the electromagnetic interference of the energy storage converter to surrounding devices can also be reduced by adjusting the structure of the power module 20.

[0114] Figure 14 for Figure 6The diagram shows the structure of the power module in some embodiments. For example... Figure 14 As shown, the power module 20 also includes a capacitor 204, and the capacitor 204 and the switching transistor 202 connected in parallel with the capacitor 204 are all mounted on the same power board 201.

[0115] In this embodiment, when the power module 20 is working, the current needs to be transmitted between the power board 201 and the capacitor 204, and between the power board 201 and the switching transistor 202. The capacitor 204 and the switching transistor 202 are mounted on the same power board 201, which can reduce the current transmission path between the power board 201 and the capacitor 204, thereby reducing the intensity of electromagnetic waves radiated during the current transmission process, and further reducing the electromagnetic interference of the energy storage converter to surrounding devices.

[0116] like Figure 14 As shown, along the fourth direction K, a switching transistor 202 is provided on both sides of the capacitor 204, and the capacitor 204 is connected in parallel with the switching transistors 202 on both sides.

[0117] The fourth direction K is perpendicular to the first direction Z. The fourth direction K can be parallel to the second direction X, parallel to the third direction Y, or intersect with both the second direction X and the third direction Y.

[0118] In this embodiment, when a capacitor 204 is connected in parallel with two switching transistors 202, the capacitor 204 is located between the two switching transistors 202. When a capacitor 204 is connected in parallel with three or more switching transistors 202, the multiple switching transistors 202 are evenly distributed around the capacitor 204, making the distance between the switching transistors 202 and the capacitor 204 uniform and minimal. This can reduce the intensity of electromagnetic waves radiated during current transmission, thereby reducing the electromagnetic interference of the energy storage converter to surrounding devices.

[0119] like Figure 14 As shown, the energy storage converter also includes a drive board 205, which is plugged into the power board 201. The drive board 205 is connected in series with the switching transistor 202 and the capacitor 204 respectively. Along the fourth direction K, the drive board 205 is located between the switching transistor 202 and the capacitor 204.

[0120] In this embodiment, the drive board 205 is located between the switch 202 and the capacitor 204, which can balance the distance between the drive board 205 and the switch 202, and between the drive board 205 and the capacitor 204, and shorten the current path between the drive board 205 and the switch 202, and between the drive board 205 and the capacitor 204, thereby reducing the electromagnetic interference of the energy storage converter to surrounding devices.

[0121] like Figure 14As shown, a driver board 205 is connected in series with at least two switching transistors 202. The switching transistors 202 connected in series with the same driver board 205 are arranged along the fifth direction T, which is perpendicular to the fourth direction K and perpendicular to the first direction Z.

[0122] In this embodiment, multiple switching transistors 202 connected in series with the same drive board 205 are arranged in a straight line, and the straight line is perpendicular to the distribution direction of the switching transistors 202 and the drive board 205. This can balance the distance between the drive board 205 and each switching transistor 202, reduce the risk of serious electromagnetic interference caused by excessive distance, and thus reduce the electromagnetic interference of the energy storage converter to surrounding devices.

[0123] Secondly, this application provides some embodiments of energy storage systems, which may include the embodiments of the energy storage converter provided in the first aspect of this application described above. Accordingly, the energy storage system may also include the technical effects of the embodiments of the energy storage converter provided in the first aspect of this application described above, which will not be repeated here.

[0124] In some embodiments, the energy storage system may further include a battery device, which is electrically connected to the external power grid via an energy storage converter. The energy storage converter can achieve bidirectional energy conversion between the battery device and the power grid. The energy storage converter can also acquire the status information of the battery device in real time and send the status information of the battery device to the external system.

[0125] Thirdly, this application provides some embodiments of electrical equipment, which may include the embodiments of the energy storage converter provided in the first aspect of this application described above. Accordingly, the electrical equipment may also include the technical effects of the embodiments of the energy storage converter provided in the first aspect of this application described above, which will not be repeated here.

[0126] Among them, electrical equipment can be household appliances, industrial electrical appliances, electric vehicles, electric ships or electric aircraft, etc., which require electrical energy.

[0127] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage converter, characterized by, The energy storage converter includes: The outer casing, which encloses a receiving cavity; A shielding plate is installed inside the receiving cavity, and the shielding plate divides the receiving cavity into a first cavity and a second cavity along a first direction. The shielding plate is grounded. A power module is installed in the first cavity, and the power module includes at least a power board and a switching transistor; The absorbing module installed in the first cavity is located on the side of the power module away from the shielding plate along the first direction. The absorbing module includes an absorbing cavity, which is connected to the first cavity through an opening. Along the first direction, the opening is located on the side of the absorbing module facing the power module. The wave-absorbing module includes a substrate mounted on the housing. Along the first direction, a first side plate and a second side plate are provided on the side of the substrate facing the power module. Along the second direction, the first side plate is connected to both sides of the substrate. Along the third direction, the second side plate is connected to both sides of the substrate. The absorbing module also includes a third side plate. Along the third direction, the two sides of the third side plate are respectively connected to the two second side plates. An opening is left between the third side plate and the first side plate. The first side plate, the substrate, the second side plate and the third side plate form the absorbing cavity.

2. The energy storage converter of claim 1, wherein, The first side plate has a first guide portion at the end away from the substrate, and the first guide portion extends obliquely in a direction toward the power module and away from the substrate.

3. The energy storage converter of claim 2, wherein, The third side plate has a second guide portion at one end facing the first side plate. The second guide portion extends obliquely in a direction close to the first side plate and the substrate, and the second guide portion and the first side plate have a first gap in the second direction.

4. The energy storage converter of claim 3, wherein, The first guide portion and the second guide portion have the opening in the first direction, and the size of the opening in the first direction is larger than the size of the first gap in the second direction.

5. The energy storage converter of claim 1, wherein, At least one first partition is connected to the substrate. The first partition is located inside the absorbing cavity. The first partition and the third side plate have a second gap in the first direction.

6. The energy storage converter of claim 1, wherein, The absorbing module further includes an absorbing element, at least a portion of which is located within the absorbing cavity.

7. The energy storage converter of claim 1, wherein, The shielding plate includes a metal substrate and an absorbing layer. The absorbing layer covers the surface of the metal substrate and is capable of absorbing part of the energy of electromagnetic waves.

8. The energy storage converter of claim 1, wherein, The shielding plate is provided with a first through hole, and the first cavity and the second cavity are connected through the first through hole.

9. The energy storage converter of claim 8, wherein, The energy storage converter also includes a first shielding module, which includes at least a first drive motor and a first moving component, with the first drive motor connected to the first moving component. When the energy storage converter is in the first mode, the first drive motor can drive the first moving part to move away from the first through hole, and the first moving part can open at least part of the first through hole. When the energy storage converter is in the second mode, the first drive motor can drive the first moving part to move towards the first through hole, and the first moving part can block at least part of the first through hole.

10. The energy storage converter of claim 9, wherein, The energy storage converter also includes a controller and a heat dissipation module. The heat dissipation module is installed in the second cavity. The controller is electrically connected to the first drive motor and the heat dissipation module respectively. When the energy storage converter is in the second mode, the controller can improve the heat dissipation efficiency of the heat dissipation module.

11. The energy storage converter according to any one of claims 1 to 10, characterized in that, The power module also includes a capacitor, and the capacitor and the switching transistor connected in parallel with the capacitor are mounted on the same power board.

12. The energy storage converter according to claim 11, characterized in that, Along the fourth direction, the switching transistors are provided on both sides of the capacitor, and the capacitor is connected in parallel with the switching transistors on both sides respectively.

13. The energy storage converter according to claim 12, characterized in that, The energy storage converter also includes a drive board, which is plugged into the power board and connected in series with the switching transistor and the capacitor respectively; Along the fourth direction, the driver board is located between the switch and the capacitor.

14. The energy storage converter according to claim 13, characterized in that, One of the driver boards is connected in series with at least two of the switching transistors; The switching transistors connected in series with the same drive board are arranged along a fifth direction, which is perpendicular to the fourth direction.

15. An energy storage system, characterized in that, The energy storage system includes a battery device and an energy storage converter according to any one of claims 1 to 14, wherein the battery device is electrically connected to the energy storage converter.

16. An electrical appliance, characterized in that, The electrical equipment includes the energy storage converter according to any one of claims 1 to 14.

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