Energy storage converter, energy storage equipment and electric equipment

Abstract

The invention relates to an energy storage converter, energy storage equipment and electric equipment, the energy storage converter comprises a shell and a high-voltage module arranged in the shell, the high-voltage module is provided with a first inductor, a first capacitor, a first circuit board and a second circuit board, and the first circuit board and the second circuit board are arranged in a spaced mode in the first direction and electrically connected. The first inductor is arranged on one side of the first circuit board away from the second circuit board. The first capacitor is arranged on one side of the second circuit board away from the first circuit board. According to the invention, the first inductor and the first capacitor are stacked along the first direction, so that the space occupied by the first inductor and the first capacitor is reduced, the space occupied by the high-voltage module is reduced, and the miniaturization of the energy storage converter is facilitated. The first circuit board and the second circuit board are stacked in the first direction and located between the first inductor and the first capacitor, so that electrical connection of the first inductor and the first capacitor is facilitated, and a current transmission path is shortened.

Description

Technical Field

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

[0002] A power conversion system (PCS) is a converter that connects the battery system to the power grid or load in an energy storage system to achieve bidirectional conversion of electrical energy. By controlling the charging and discharging process of the battery, it performs AC-DC conversion and can directly supply power to AC loads when there is no power grid. It is an important component of the entire energy storage system.

[0003] To realize its function, the energy storage converter needs to integrate high-voltage box, power devices, heat dissipation devices and other structures. The existing energy storage converter has low internal space utilization and a messy structure, resulting in a large size of energy storage converter. Summary of the Invention

[0004] This application provides an energy storage converter, an energy storage device, and an electrical device to solve the problem of the large size of the energy storage converter.

[0005] An energy storage converter provided in this application includes: a housing and a high-voltage module disposed within the housing. The high-voltage module has a first inductor, a first capacitor, a first circuit board, and a second circuit board. The first circuit board and the second circuit board are spaced apart along a first direction and electrically connected. The first inductor is disposed on the side of the first circuit board away from the second circuit board, and the first capacitor is disposed on the side of the second circuit board away from the first circuit board.

[0006] In one possible implementation, the high-voltage module has a mounting bracket with a clearance groove and a receiving space. When the second circuit board is supported by the mounting bracket, the clearance groove avoids the first capacitor so that the first capacitor extends into the receiving space.

[0007] In one possible implementation, a connecting protrusion is provided on the sidewall of the clearance groove, which can be connected to the second circuit board.

[0008] In one possible implementation, the second circuit board is provided with a clearance recess, and the top wall of the mounting bracket is provided with a support column, the clearance recess being able to avoid the support column.

[0009] In one possible implementation, the mounting bracket is further provided with heat dissipation holes and / or heat dissipation grooves.

[0010] In one possible implementation, the mounting bracket is further provided with a connecting plate that can be connected to a partition inside the housing.

[0011] In one possible implementation, the distance L between the first circuit board and the second circuit board satisfies: 5mm ≤ L ≤ 20mm.

[0012] In one possible implementation, the energy storage converter further includes a power module and a heat dissipation module. The housing has a first cavity and a second cavity. The high-voltage module and the power module are disposed in the first cavity, and the power module is disposed in the second cavity.

[0013] In one possible implementation, the power module includes a power board and a second capacitor, the second capacitor being disposed on the power board.

[0014] In one possible implementation, a switching element is provided on the power board, and the switching element is located on at least one side of the second capacitor.

[0015] In one possible implementation, the high-voltage module has a first sampler located downstream of the first inductor, along the direction of current flow in the energy storage converter.

[0016] In one possible implementation, the high-voltage module further includes a relay located between the first inductor and the power board along the direction of current flow in the energy storage converter; the first sampler is located between the first inductor and the relay.

[0017] In one possible implementation, the high-voltage module further includes a relay located between the first inductor and the power board along the direction of current flow in the energy storage converter; the first sampler is located between the relay and the power board.

[0018] In one possible implementation, the housing has a connection end, which is provided with an input terminal and an output terminal; the high-voltage module is closer to the input terminal than the output terminal.

[0019] In one possible implementation, the high-voltage module further includes a circuit breaker and a second sampler located between the input terminal and the circuit breaker, along the direction of current flow in the energy storage converter.

[0020] This application provides an energy storage device, which includes a battery device and the energy storage converter described above.

[0021] This application provides an embodiment of an electrical device, which includes the energy storage converter described above.

[0022] In this application, by stacking the first inductor and the first capacitor along the first direction, the space occupied by the first inductor and the first capacitor is reduced, which is beneficial to reducing the space occupied by the high-voltage module, and thus facilitating the miniaturization of the energy storage converter. The first circuit board and the second circuit board are stacked along the first direction and located between the first inductor and the first capacitor, which facilitates the electrical connection of the first inductor and the first capacitor and helps to shorten the current transmission path.

[0023] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0024] Figure 1 A schematic diagram of the energy storage converter provided in this application in some embodiments; Figure 2 for Figure 1 A schematic diagram of part of the internal structure of the energy storage converter in some embodiments; Figure 3 for Figure 2 A schematic diagram of the structure of the first inductor, the first capacitor, the first circuit board and the second circuit board in some embodiments; Figure 4 for Figure 2 A schematic diagram of the structure of the first inductor, first capacitor, first circuit board, second circuit board, and mounting bracket in some embodiments; Figure 5 for Figure 2 A schematic diagram of the mounting bracket in some embodiments; Figure 6 for Figure 1 Cross-sectional view of part of the internal structure of the energy storage converter in some embodiments; Figure 7 for Figure 1 A schematic diagram of the power module in some embodiments; Figure 8 for Figure 1 The high-voltage module in some embodiments is shown in the structural diagram.

[0025] Figure label: 1-Housing; 11-First cavity; 12-Second cavity; 13-Input terminal; 14-Output terminal; 2-High voltage module; 21-First circuit board; 22-Second circuit board; 221-Avoidance recess; 23-First inductor; 24-First capacitor; 25-Mounting bracket; 251-Avoidance groove; 252-Heat dissipation groove; 253-Heat dissipation hole; 254-Connecting plate; 255-Connecting protrusion; 256-Support column; 26-First sampler; 27-Relay; 28-Circuit breaker; 29-Fuse; 3-Power module; 31-Power board; 32-Second capacitor; 33-Switch; 4-Heat dissipation module; 41-Fan; 42-Heat radiator.

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] For example, an energy storage converter contains components such as a drive board, power board, and switching devices. During operation, the high-frequency switching of the switching devices converts 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 high-frequency switching of the switching devices can rectify the AC power into DC power, which is then output to the battery device to charge it.

[0034] Figure 1 This is a schematic diagram of the structure of an energy storage converter in some embodiments. Figure 2 for Figure 1 A schematic diagram of part of the internal structure of the energy storage converter in some embodiments. Figure 3 for Figure 2 The diagram shows the structure of the first inductor 23, the first capacitor 24, the first circuit board 21, and the second circuit board 22 in some embodiments. For example... Figures 1-3 As shown, the energy storage converter includes a housing 1 and a high-voltage module 2 disposed within the housing 1. The high-voltage module 2 has a first inductor 23, a first capacitor 24, a first circuit board 21, and a second circuit board 22. The first circuit board 21 and the second circuit board 22 are spaced apart along a first direction X and electrically connected. The first inductor 23 is disposed on the side of the first circuit board 21 away from the second circuit board 22, and the first capacitor 24 is disposed on the side of the second circuit board 22 away from the first circuit board 21. Electrical connection means that the energy storage converter can transmit current after being powered on or operating. The first inductor 23, the first capacitor 24, the first circuit board 21, and the second circuit board 22 can form a filter to remove high-frequency noise and suppress electromagnetic interference in the current.

[0035] By stacking the first inductor 23 and the first capacitor 24 along the first direction X, the space occupied by the first inductor 23 and the first capacitor 24 is reduced, which helps to reduce the space occupied by the high-voltage module 2, and thus facilitates the miniaturization of the energy storage converter. The first circuit board 21 and the second circuit board 22 are stacked along the first direction X and located between the first inductor 23 and the first capacitor 24, which facilitates the electrical connection of the first inductor 23 and the first capacitor 24 and helps to shorten the current transmission path.

[0036] For example, the first direction X is the height direction of the energy storage converter, the first inductor 23 is located above the height direction, and the first capacitor 24 is located below the height direction. In some other embodiments, the first inductor 23 may also be located below the height direction, and the first capacitor 24 may be located above the height direction, or the first direction X may also be a direction of the energy storage converter other than the height direction.

[0037] For example, the shell is generally rectangular in shape.

[0038] In some embodiments, the housing 1 is an integral structure, which helps to increase the overall structural stability of the housing 1.

[0039] In other embodiments, the housing 1 includes multiple housing components connected by welding, bonding, riveting, fastener connection, snap-fitting, or other methods. These multiple housing components can be manufactured individually, thereby reducing the manufacturing difficulty of the housing 1.

[0040] Figure 4 for Figure 2 The diagram shows the structure of the first inductor 23, the first capacitor 24, the first circuit board 21, the second circuit board 22, and the mounting bracket 25 in some embodiments. Figure 5 for Figure 2 The mounting bracket 25 is shown in a structural diagram in some embodiments. For example... Figure 4 and Figure 5 As shown, the high-voltage module 2 has a mounting bracket 25, which has a clearance groove 251 and a receiving space. When the second circuit board 22 is supported by the mounting bracket 25, the clearance groove 251 clears the first capacitor 24, allowing the first capacitor 24 to extend into the receiving space. That is, the first capacitor 24 is accommodated in the receiving space, and the clearance groove 251 allows the first capacitor 24 to smoothly enter the receiving space. At least a portion of the receiving space is enclosed by the mounting bracket 25.

[0041] Since the lengths of the first capacitors 24 are not entirely uniform, directly installing the first capacitors 24 inside the housing 1 results in poor installation stability, as do the installation stability of the first inductor 23, the first circuit board 21, and the second circuit board 22. By setting up the mounting bracket 25, the first inductor 23, the first capacitor 24, the first circuit board 21, and the second circuit board 22 can be stably installed inside the housing 1, which helps to improve the working stability of the energy storage converter.

[0042] When the first capacitor 24 is housed within the receiving space, the second circuit board 22 abuts against the top wall of the mounting bracket 25, providing support for the second circuit board 22. A connecting protrusion 255 is provided on the side wall of the clearance groove 251. The second circuit board 22 can be connected to the connecting protrusion 255 by welding, bonding, riveting, fastening, snap-fitting, etc., achieving a stable connection between the second circuit board 22 and the mounting bracket 25, thereby allowing the first capacitor 24 to be securely installed within the housing 1.

[0043] The mounting bracket 25 is also provided with a connecting plate 254, which can abut against the partition inside the housing 1 and be stably connected to the partition inside the housing 1 by welding, bonding, riveting, fastening, snap-fitting, etc.

[0044] In other embodiments, such as Figure 4 As shown, the second circuit board 22 is provided with a relief recess 221, and the top wall of the mounting bracket 25 is provided with a support column 256. The support column 256 can pass through the relief recess 221 to provide support to the first circuit board 21, thereby realizing a stable connection between the first circuit board 21 and the mounting bracket 25, and thus enabling the first inductor 23 to be stably installed in the housing 1.

[0045] The cooperation between the recess 221 and the support column 256 can also restrict the installation position of the second circuit board 22, so that the projections of the first circuit board 21 and the second circuit board 22 along the first direction X mostly overlap.

[0046] For example, the clearance recesses 221 are provided at the four corners of the second circuit board 22, and the support pillars 256 are provided corresponding to the clearance recesses 221, thereby ensuring stable support for the first circuit board 21 and the first inductor 23.

[0047] For example, the support column 256 may be cylindrical or prismatic. This application does not limit the specific shape of the support column 256.

[0048] In some embodiments, the mounting bracket 25 is further provided with heat dissipation holes 253 and / or heat dissipation grooves 252, that is, the mounting bracket 25 may only be provided with heat dissipation holes 253, the mounting bracket 25 may only be provided with heat dissipation grooves 252, or the mounting bracket 25 may be provided with both heat dissipation holes 253 and heat dissipation grooves 252.

[0049] The heat dissipation holes 253 and heat dissipation slots 252 can increase the airflow in the accommodating space, improve the heat dissipation effect on the first capacitor 24, prevent the first capacitor 24 from overheating, and ensure that the first capacitor 24 can work at the verified temperature to prevent damage to the first capacitor 24.

[0050] For example, heat dissipation holes 253 are symmetrically arranged on two opposite side walls of the mounting bracket 25, and heat dissipation slots 252 are symmetrically arranged on two other opposite side walls of the mounting bracket 25. That is, in the direction of the arrangement of heat dissipation holes 253, the air intake and air exhaust of the accommodating space are similar; in the direction of the arrangement of heat dissipation slots 252, the air intake and air exhaust of the accommodating space are similar.

[0051] For example, multiple heat dissipation holes 253 are arranged in an array on the side wall of the mounting bracket 25. Two heat dissipation slots 252 are provided at intervals on the side wall of the mounting bracket 25 where the heat dissipation slots 252 are provided. Compared to the mounting bracket 25 where only one large heat dissipation slot 252 is provided on the side wall where the heat dissipation slots 252 are provided, the mounting bracket 25 is stronger and less prone to damage.

[0052] Understandably, this application does not impose any restrictions on the structure or shape of the mounting bracket 25.

[0053] In some embodiments, the distance L between the first circuit board 21 and the second circuit board 22 satisfies: 5mm ≤ L ≤ 20mm. For example, the distance L between the first circuit board 21 and the second circuit board 22 can specifically be 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 18.5mm, 19mm, 19.5mm, or 20mm.

[0054] The distance L between the first circuit board 21 and the second circuit board 22 should not be too large or too small. If the distance L is too small (e.g., less than 5 mm), the first circuit board 21 and the second circuit board 22 are prone to short circuits due to conductive foreign objects, and insufficient creepage distance can easily lead to leakage. If the distance L is too large (e.g., greater than 20 mm), it will occupy a large space, increasing the size of the high-voltage module 2, which is not conducive to the miniaturization of the energy storage converter. Therefore, the distance L between the first circuit board 21 and the second circuit board 22 should be set within a reasonable range to balance electrical safety and space occupancy.

[0055] In other embodiments, the distance L between the first circuit board 21 and the second circuit board 22 satisfies: 8mm≤L≤10mm, further balancing the electrical safety and space occupancy of the first circuit board 21 and the second circuit board 22.

[0056] Figure 6 for Figure 1 Cross-sectional views of some internal structures of the energy storage converter in some embodiments. For example... Figure 6As shown, the energy storage converter also includes a power module 3 and a heat dissipation module 4. The housing 1 has a first cavity 11 and a second cavity 12. The high voltage module 2 and the power module 3 are disposed in the first cavity 11, and the power module 3 is disposed in the second cavity 12. This makes the space utilization rate of the energy storage converter high, the structure simple and orderly, and facilitates the miniaturization of the energy storage converter, as well as the assembly and maintenance of the energy storage converter.

[0057] The first cavity 11 and the second cavity 12 are separated by a partition. The partition provides stable support for the high-voltage module 2 and the power module 3, enabling the high-voltage module 2 and the power module 3 to operate stably during the operation of the energy storage converter.

[0058] For example, the first cavity 11 and the second cavity 12 are distributed along the height direction of the housing 1, that is, the partition extends along the height direction perpendicular to the housing 1. In some other embodiments, the first cavity 11 and the second cavity 12 may also be distributed along the height direction perpendicular to the housing 1. It is understood that this application does not limit the distribution direction of the first cavity 11 and the second cavity 12.

[0059] like Figure 6 As shown, the heat dissipation module 4 includes a fan 41 and a heat sink 42. Multiple fans 41 are arranged along the width or length direction of the housing 1. The heat sink 42 is disposed on one side of the fan 41. The distribution direction of the heat sink 42 and the fan 41 is perpendicular to the arrangement direction of the multiple fans 41.

[0060] For example, the power module 3 is disposed above the heat sink 42, and the partition is provided with a groove. The power module 3 can abut against the heat sink 42 through the groove, so that the heat generated by the power module 3 can be efficiently transferred to the heat sink 42, and then the air blown by the fan 41 can achieve efficient heat dissipation.

[0061] Figure 7 for Figure 1 The diagram shows the structure of the power module in some embodiments. For example... Figure 7 As shown, the power module 3 includes a power board 31 and a second capacitor 32, with the second capacitor 32 disposed on the power board 31.

[0062] In this embodiment, when the power module 3 is working, the current needs to be transmitted between the power board 31 and the second capacitor 32. By directly placing the second capacitor 32 on the power board 31, the current transmission path between the power board 31 and the second capacitor 32 can be reduced, which is also beneficial to reducing the size of the power module 3 and miniaturizing the energy storage converter.

[0063] A switch 33 is provided on the power board 31, and the switch 33 is located on at least one side of the second capacitor 32.

[0064] In this embodiment, when the power module 3 is working, the current also needs to be transmitted between the power board 31 and the switch 33. By directly placing the switch 33 between the power boards 31, the current transmission path between the power board 31 and the switch 33 can be reduced, which is also beneficial to reducing the size of the power module 3 and miniaturizing the energy storage converter.

[0065] In some embodiments, such as Figure 7 As shown, the second capacitors 32 are arranged in an array, and each column of second capacitors 32 has a switch 33 on both sides. The second capacitors 32 in adjacent columns can share the switch 33, that is, only one switch 33 is needed between the second capacitors 32 in adjacent columns.

[0066] like Figure 2 As shown, the distribution direction of the multiple first inductors 23 is parallel to the distribution direction of the switching components 33.

[0067] Figure 8 for Figure 1 The high-voltage module in the diagram is shown in some embodiments. For example... Figure 8 As shown, the high-voltage module 2 also includes: circuit breaker 28, fuse 29, and relay 27. After the AC power output from the power grid or photovoltaic base station enters the energy storage converter, it first enters the high-voltage module 2, and flows sequentially through circuit breaker 28, fuse 29, filter (i.e., first circuit board 21, second circuit board 22, first inductor 23, first capacitor 24), and relay 27.

[0068] Among them, the relay 27 can be made of semiconductor materials such as silicon carbide (SiC) or gallium nitride (GaN).

[0069] In some embodiments, the high-voltage module 2 has a first sampler 26 located downstream of the first inductor 23 along the current flow direction in the energy storage converter. The first sampler 26 is used to collect current for control of the high-voltage module 2. For example, the first sampler 26 may be a Hall effect sampler.

[0070] Existing energy storage converters typically place the first sampler 26 between the fuse 29 and the first inductor 23. Due to the presence of high-frequency noise in the current, the detection accuracy is poor, affecting the control precision of the charging and discharging power, and consequently impacting the operational stability of the energy storage converter. This embodiment, by placing the first sampler 26 downstream of the first inductor 23, minimizes the noise in the sampled current, resulting in higher accuracy. This improves the control precision of the charging and discharging power of the energy storage converter and enhances its operational stability.

[0071] In one specific embodiment, along the direction of current flow in the energy storage converter, the relay 27 is located between the first inductor 23 and the power board 31; the first sampler 26 is located between the first inductor 23 and the relay 27.

[0072] In this embodiment, by placing the first sampler 26 between the first inductor 23 and the relay 27, the first sampler 26 is able to collect current information flowing from the first inductor 23 to the relay 27. Since the first sampler 26 is located upstream of the relay 27, it can still detect current information when the relay 27 is disconnected.

[0073] In another specific implementation, the first sampler 26 is located between the relay 27 and the power board 31.

[0074] In this embodiment, by placing the first sampler 26 between the relay 27 and the power board 31, the first sampler 26 can collect the current information flowing from the relay 27 to the power board 31 and obtain the current information flowing from the high voltage module 2 to the power module 3.

[0075] In some embodiments, such as Figure 1 and Figure 2 As shown, housing 1 has a connection end, which is provided with input terminal 13 and output terminal 14; high voltage module 2 is closer to input terminal 13 than output terminal 14.

[0076] For example, "the high voltage module 2 is closer to the input terminal 13 than the output terminal 14" means that the high voltage module 2 is closer to the input terminal 13 on the center line perpendicular to the distribution direction of the input terminal 13 and the output terminal 14, that is, the distance between the center line and the input terminal 13 is less than the distance between the center line and the output terminal 14.

[0077] In this embodiment, current is input to the energy storage converter through input terminal 13 and output to the energy storage converter through output terminal 14. By placing input terminal 13 and output terminal 14 on the same end of the energy storage converter, it is convenient for the energy storage converter to be connected to the power grid, photovoltaic base station, electrical equipment, etc. The high-voltage module 2 is located close to input terminal 13, which reduces the current transmission path between input terminal 13 and high-voltage module 2, and also facilitates the circuit connection between input terminal 13 and high-voltage module 2.

[0078] For example, the connection end is one side end face of the housing 1. Multiple input terminals 13 are spaced apart, and all input terminals 13 are located near the side of the connection end; multiple output terminals 14 are spaced apart, and all output terminals 14 are located near the other side of the connection end, so that the operator can easily distinguish between the input terminals 13 and the output terminals 14.

[0079] For example, the orientation of the input terminal 13 is different from that of the output terminal 14, which makes it easier to distinguish between the input terminal 13 and the output terminal 14, and also makes the orientation of the cables connected to the input terminal 13 and the output terminal 14 different, which makes it easier to distinguish and repair.

[0080] In some embodiments, the high-voltage module 2 further includes a second sampler located between the input terminal 13 and the circuit breaker 28, along the direction of current flow in the energy storage converter. The second sampler is used to collect current data for control of the high-voltage module 2. Exemplarily, the second sampler may be a Hall effect sampler.

[0081] In this embodiment, by placing the second sampler between the input terminal 13 and the circuit breaker 28, the second sampler can collect information on the current flowing into the high-voltage module 2, so as to control the current input to the high-voltage module 2.

[0082] In some embodiments, the energy storage converter is further provided with a control module, which can receive current information collected by the first sampler 26 and the second sampler, and perform comprehensive analysis to realize the adjustment and control of the high voltage module 2.

[0083] Secondly, this application provides some embodiments of energy storage devices, which may include the embodiments of the energy storage converter provided in the first aspect of this application described above. Accordingly, the energy storage device 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.

[0084] In some embodiments, the energy storage device 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.

[0085] 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.

[0086] Among them, electrical equipment can be household appliances, industrial electrical appliances, electric vehicles, electric ships or electric aircraft, etc., which require electrical energy.

[0087] 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 in that, The energy storage converter includes a housing and a high-voltage module disposed within the housing. The high-voltage module has a first inductor, a first capacitor, a first circuit board, and a second circuit board. The first circuit board and the second circuit board are spaced apart along a first direction and electrically connected. The first inductor is disposed on the side of the first circuit board away from the second circuit board, and the first capacitor is disposed on the side of the second circuit board away from the first circuit board.

2. The energy storage converter according to claim 1, characterized in that, The high-voltage module has a mounting bracket, which is provided with a clearance groove and a receiving space. When the second circuit board is supported by the mounting bracket, the clearance groove avoids the first capacitor so that the first capacitor extends into the receiving space.

3. The energy storage converter according to claim 2, characterized in that, The mounting bracket is also provided with heat dissipation holes and / or heat dissipation grooves.

4. The energy storage converter according to claim 1, characterized in that, The distance L between the first circuit board and the second circuit board satisfies: 5mm≤L≤20mm.

5. The energy storage converter according to claim 1, characterized in that, The energy storage converter also includes a power module and a heat dissipation module. The housing has a first cavity and a second cavity. The high-voltage module and the power module are disposed in the first cavity, and the power module is disposed in the second cavity.

6. The energy storage converter according to claim 5, characterized in that, The power module includes a power board and a second capacitor, wherein the second capacitor is disposed on the power board.

7. The energy storage converter according to claim 6, characterized in that, The power board is provided with a switch, which is located on at least one side of the second capacitor.

8. The energy storage converter according to claim 6, characterized in that, The high-voltage module has a first sampler located downstream of the first inductor, along the direction of current flow in the energy storage converter.

9. The energy storage converter according to claim 8, characterized in that, The high-voltage module also has a relay, which is located between the first inductor and the power board along the direction of current flow in the energy storage converter. The first sampler is located between the first inductor and the relay.

10. The energy storage converter according to claim 8, characterized in that, The high-voltage module also has a relay, which is located between the first inductor and the power board along the direction of current flow in the energy storage converter. The first sampler is located between the relay and the power board.

11. The energy storage converter according to any one of claims 1-10, characterized in that, The housing has a connection end, which is provided with an input terminal and an output terminal; The high-voltage module is closer to the input terminal than the output terminal.

12. The energy storage converter according to claim 11, characterized in that, The high-voltage module also has a circuit breaker and a second sampler, located between the input terminal and the circuit breaker along the direction of current flow in the energy storage converter.

13. An energy storage device, characterized in that, The energy storage device includes a battery device and an energy storage converter as described in any one of claims 1-12.

14. An electrical appliance, characterized in that, The electrical equipment includes the energy storage converter as described in any one of claims 1-12.

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