Energy storage converter

Abstract

The utility model belongs to the field of energy storage converters, and provides an energy storage converter comprising a box body, the outer side wall of which is provided with a DC input / output port and an AC input / output port; the mainboard is positioned in the box body and is used for controlling the operation of the energy storage converter; and the power board is electrically connected with the main board and located below the main board, the power board is used for current conversion, and the direct current input and output port and the alternating current input and output port are electrically connected with the power board. Compared with the prior art, the energy storage converter has the advantages that the fan I, the fan II, the fan III, the radiator and the vent holes are matched, and the layered structure of the main board and the power board is combined, so that a ventilation loop is formed in the energy storage converter, and the coverage range of the air cooling effect is wider; heat generated during operation of devices such as a mainboard and a power board can be quickly taken away; the whole structure is simple, the individual design separated from the MPPT controller is realized, and the flexibility and adaptability of the energy storage system are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage converters, and specifically relates to an energy storage converter. Background Technology

[0002] With the development of renewable energy and the application of smart grids, the demand for energy storage systems is increasing. Energy storage converters, or PCS for short, are mainly used to achieve bidirectional conversion between alternating current (AC) and direct current (DC). Specifically, during charging, they convert AC power from the grid to DC power to charge the battery pack; during discharging, they convert DC power from the battery back to AC power to feed back to the grid or power the load. However, in existing technologies, energy storage converters are often integrated with MPPT controllers in the same device. This results in a relatively concentrated overall layout, a large number of high-frequency power switching devices that are prone to overheating, and as usage time increases, the internal air temperature rises, affecting the normal operation of the energy storage converter and thus reducing its lifespan. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose an energy storage converter with a simple overall structure and strong heat dissipation.

[0004] The technical solution adopted by this utility model to solve its technical problem is to propose an energy storage converter, including: a housing, on the outer wall of the housing are provided DC input / output ports and AC input / output ports;

[0005] The motherboard, located inside the enclosure, is used to control the operation of the energy storage converter.

[0006] A power board, electrically connected to the motherboard and located below the motherboard, is used for current conversion. The DC input / output port and the AC input / output port are electrically connected to the power board.

[0007] The heat sink is located below and in contact with the power board;

[0008] Fan 1 is located on one side of the motherboard; Fan 2 is located below the motherboard; Fan 3 is located on one side of the heat sink.

[0009] In the aforementioned energy storage converter, the main board is provided with two levels of common mode inductors, a leakage current sensor, and a relay. The common mode inductors are positioned opposite to the first fan, and the second fan is positioned opposite to the common mode inductors.

[0010] In the above-mentioned energy storage converter, the power board is provided with a bus capacitor II, an inverter bridge and a balance bridge circuit composed of switching devices, and the inverter bridge and balance bridge circuit are located below the power board and are in contact with the heat sink.

[0011] The energy storage converter also includes a balance bridge inductor and a balance bridge inductor heat sink that are electrically connected to the balance bridge circuit. The balance bridge inductor heat sink encloses the balance bridge inductor and is located on one side of the fan.

[0012] The energy storage converter also includes a fifth fan, which is located on the other side of the balanced bridge inductor heat sink.

[0013] In the aforementioned energy storage converter, a bus capacitor board is also included. The bus capacitor board is located on one side of the power board and is electrically connected to the power board. A plurality of bus capacitors are provided on the bus capacitor board, and the fan blades of the fan face the area above the bus capacitors.

[0014] In the aforementioned energy storage converter, a power inductor board electrically connected to the motherboard is also included. The power inductor board is located on the other side of the power board. The power inductor board is provided with a power inductor and a power inductor heat sink. The power inductor heat sink is located on one side of the heat sink and wraps around the power inductor.

[0015] In the above-mentioned energy storage converter, there is also a fan and a pullback capacitor plate electrically connected to the power inductor board. The pullback capacitor plate is located between the power inductor board and the main board, and the pullback capacitor plate is provided with a plurality of pullback capacitors.

[0016] The fourth fan is located on one side of the pull-back capacitor plate, and the fan blades of the fourth fan face the pull-back capacitor.

[0017] In the aforementioned energy storage converter, the number of fans three is four, and they are arranged in a row side by side.

[0018] In the aforementioned energy storage converter, ventilation holes are provided on the side walls and bottom of the housing, and copper pipes are provided inside the radiator.

[0019] In the above-mentioned energy storage converter, the DC input / output port includes a battery connection port and an MPPT connection port, and the AC input / output port includes a static transfer switch connection port.

[0020] The enclosure is also equipped with a display screen, a communication port, and a WiFi data acquisition stick connection port, all of which are electrically connected to the motherboard.

[0021] In the above-mentioned energy storage converter, an external support with a receiving cavity is also included. The receiving cavity is used to house the energy storage converter. A first support foot and a second support foot are respectively provided at the diagonal corners of the top and bottom walls of the external support. A slot is opened in the second support foot. Two adjacent external supports can be stacked by movably inserting the first support foot into the slot.

[0022] The two side walls of the energy storage converter also extend outward with limiting plates, which move against the external support to limit the relative position of the energy storage converter within the receiving cavity.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The present invention provides an energy storage converter that utilizes a combination of fan one, fan two, fan three, heat sink and ventilation holes, as well as a layered structure of motherboard and power board, to form a ventilation circuit inside the energy storage converter. Its air cooling effect covers a wider range and helps to quickly remove the heat generated by the motherboard, power board and other devices during operation. The overall structure is simple and realizes a personalized design that is separate from the MPPT controller, which greatly improves the flexibility and adaptability of the energy storage system.

[0025] (2) By integrating the bus capacitor, the present invention can effectively suppress voltage peaks and stabilize the bus voltage. Working together with the power inductor, it further enhances the reliability and stability of the system. This not only protects the connected equipment from voltage fluctuations, but also improves the service life of the entire system.

[0026] (3) The external bracket, through the plug-in design of the first support foot and the slot, helps to stack different PCS devices to achieve the effect of power expansion. The operation is simple, convenient and quick, and the stability after expansion is guaranteed. Attached Figure Description

[0027] Figure 1 This is a perspective view of this application;

[0028] Figure 2 This is a schematic diagram of the installation structure of the external bracket;

[0029] Figure 3 This is a schematic diagram of the mounting structure of the components on the motherboard;

[0030] Figure 4 This is a schematic diagram of the installation structure between the motherboard, pull-back capacitor board, power inductor heatsink, and heatsink.

[0031] Figure 5 It is a schematic diagram of the installation structure of bus capacitors, balance bridge, inverter bridge, circuit breakers and fuses;

[0032] Figure 6 yes Figure 4 An exploded view of the motherboard and power board in the image.

[0033] In the diagram, 1 is the housing; 10 is the MPPT connection port; 11 is the battery connection port; 12 is the display screen; 13 is the communication port; 14 is the static selector switch connection port; 15 is the WiFi data acquisition stick; 16 is the limit plate; and 17 is the handle.

[0034] 2. Mainboard; 20. Common mode inductor; 21. Leakage sensor; 22. Relay;

[0035] 3. Power board; 30. Bus capacitor board; 300. Bus capacitor one; 31. Power inductor heat sink; 32. Bus capacitor two; 33. Balanced bridge; 34. Inverter bridge; 35. Circuit breaker; 36. Fuse;

[0036] 4. Radiator;

[0037] 50. Fan 1; 51. Fan 2; 52. Fan 3; 53. Fan 4; 54. Fan 5;

[0038] 6. Pull-back capacitor plate; 60. Pull-back capacitor;

[0039] 70. Balanced bridge inductor; 71. Balanced bridge inductor heatsink;

[0040] 8. External bracket; 80. Receiving cavity; 81. First support leg; 82. Second support leg; 820. Groove; 83. Anti-detachment plate. Detailed Implementation

[0041] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0043] Example 1:

[0044] like Figures 1 to 6As shown, this utility model discloses an energy storage converter, abbreviated as PCS (hereinafter referred to as PCS), which is a device capable of bidirectional energy flow, converting DC to AC and AC to DC. The energy storage converter is generally connected to a battery pack. It can receive DC power from photovoltaic modules or AC power from the grid, convert it through internal components to charge the battery pack, and can also manage battery discharge to supply power to the load. The energy storage converter includes a housing 1. The outer wall of the housing 1 is provided with DC input / output ports and AC input / output ports. The DC input / output ports include an MPPT connection port 10 for connecting to an external MPPT controller (MPPT stands for Maximum Power Point Solar Controller) and a battery connection port 11 for connecting to the battery pack. The AC input / output ports are used to connect to single-phase or three-phase power. Mainboard 2, located inside enclosure 1, controls the operation of the energy storage converter, i.e., manages the battery's energy and performs bidirectional energy conversion. Power board 3, located below mainboard 2, is controlled by mainboard 2. Power board 3 has a topology circuit for bidirectional energy conversion (DC to AC and AC to DC). MPPT connection port 10 and battery connection port 11 are electrically connected to power board 3. Heat sink 4, located below and attached to power board 3, has dozens of switching devices (MOSFETs, IGBTs, etc.) on the side of power board 3 facing heat sink 4. These switching devices generate a lot of heat during operation, and their performance will be affected if they are not cooled in time. In this embodiment, the switching devices are located below power board 3 and attached to heat sink 4. Heat sink 4 is generally made of aluminum, and copper pipes are installed in heat sink 4 to enhance heat dissipation. Fan 1 50 is located on one side of mainboard 2; Fan 2 51 is located below mainboard 2; Fan 3 52 is located on one side of heat sink 4. The housing 1 is also equipped with a display screen 12, a communication port 13, and a WiFi data acquisition stick 15; the WiFi data acquisition stick 15 is used for wireless data transmission. The AC input / output ports of this embodiment include a static transfer switch connection port 14 for connecting an external static transfer switch (the static transfer switch is used for switching between different power sources).

[0045] The motherboard 2 has two common-mode inductors 20, a leakage current sensor 21, and a relay 22. The common-mode inductor 20 is positioned opposite to the first fan 50, and the second fan 51 is positioned opposite to the common-mode inductor 20. The second fan 51 is used to dissipate heat from the common-mode inductor 20 and the relay 22.

[0046] Specifically, such as Figures 1 to 3As shown, in charging mode, the energy storage converter converts the alternating current (AC) supplied by the grid into direct current (DC) and charges the battery pack through the battery connection port 11; in discharging mode, the energy storage converter converts the DC output from the battery back into AC for the load. During this process, wireless data transmission is achieved through the WiFi data acquisition stick 15, allowing the system to easily access the network for remote monitoring and management. The two-stage common-mode inductor 20 has two three-phase common-mode inductors 20, whose function is to suppress common-mode noise, improve EMC performance, and protect sensitive equipment. By setting two three-phase common-mode inductors 20, the common-mode noise suppression capability is enhanced, the noise suppression frequency range is expanded, and the impact of electromagnetic interference on the system is reduced. By utilizing fans 1 50, fans 2 51, fans 3 52, heat dissipation devices and ventilation holes (located at the bottom and side walls of the enclosure 1, with the two side walls of the energy storage converter arranged opposite each other to form a straight ventilation path), and combined with the layered structure of the main board 2 and power board 3, a ventilation loop is formed inside the energy storage converter, and its air cooling effect covers a wider range, which helps to quickly remove the heat generated by the main board 2 and power board 3 during operation.

[0047] In this embodiment, a leakage current sensor 21 continuously monitors current changes. Upon detecting an anomaly, an alarm is immediately triggered, and the control system is notified to take appropriate measures. In conjunction with a relay 22, the circuit control is automatically switched according to system requirements, ensuring the safety and reliability of power transmission. Simultaneously, the common-mode inductor 20 on the power board 3 suppresses common-mode noise, enhancing the system's anti-interference capability and improving stability (this common-mode inductor 20 consists of two windings). A circuit breaker 35 controlled by a microcontroller quickly disconnects the circuit in case of overload or short circuit, preventing equipment damage. A fuse 36 serves as an additional overload protection mechanism, ensuring system safety even in extreme conditions. Therefore, this energy storage converter achieves efficient conversion of electrical energy between different forms, reducing energy loss and improving overall energy utilization efficiency. It is particularly suitable for energy storage applications in renewable energy systems. The entire device is easy to install and maintain, and provides rich interface options with multiple electronic components, allowing users to expand and adjust according to actual needs. It achieves a personalized design separate from the MPPT controller, greatly improving the flexibility and adaptability of the energy storage system.

[0048] like Figure 3As shown, this embodiment also includes a bus capacitor board 30, which is located on one side of the power board 3 and electrically connected to it. The bus capacitor board 30 has several bus capacitors 300. The fan blades of the fan 50 face the area above the bus capacitors 300. These bus capacitors 300 effectively suppress voltage peaks, protecting the system from bus voltage fluctuations and further enhancing system safety. In this embodiment, there are no components above the bus capacitors 300, i.e., there is a blank area. The fan blades of the fan 50 face this blank area. When the fan 50 runs, it can dissipate the heat generated by the bus capacitors 300, contributing to their stable operation.

[0049] like Figures 3 to 6 As shown, this embodiment has two bus capacitors, one of which is the aforementioned bus capacitor 300, and the other is... Figure 5 and Figure 6 The bus capacitor 32 shown is preferably an electrolytic capacitor, while the bus capacitor 300 is a thin-film capacitor. Additionally, the power board 3 in this embodiment also has a balance bridge 33 and an inverter bridge 34 on both sides of the bus capacitor 32. The balance bridge 33 consists of four IGBTs and its function is to regulate the charging and discharging of the bus capacitors 300 and 32, keeping their midpoint voltage stable. The inverter bridge 34 has both DC-to-AC and AC-to-DC conversion functions.

[0050] like Figure 3 As shown, in this embodiment, the static transfer switch connection port 14 (STS) has four connection terminals (i.e., RSTN). In a 380V / 400V (industrial) or 220V (civilian) three-phase system, R, S, and T represent three live wires (phase difference 120°), and N is the neutral wire (zero potential reference).

[0051] like Figure 5 and Figure 6As shown, this embodiment also includes a power inductor board, located on the other side of the power board 3. The power inductor board has three power inductors and three power inductor heat sinks 31. Each power inductor corresponds to and is enclosed by a power inductor heat sink 31, which is located on one side of the heat sink 4. The power inductors on the power inductor board are mainly used to smooth voltage fluctuations and ensure a stable voltage supplied to the load. They store electrical energy and release it when needed to cope with sudden load changes or power fluctuations, reducing noise and harmonic interference in the system. The power inductor heat sinks 31 are used to improve the heat dissipation of the power inductors. They typically use highly efficient heat dissipation materials and, by being installed close to the heat source, can quickly remove heat, keeping the operating temperature of the power inductors and other components within a safe range.

[0052] like Figure 5 and Figure 6 As shown, this embodiment also includes a pull-back capacitor board 6. Since the pull-back capacitor board 6 is located between the power inductor board and the main board 2, and the pull-back capacitor board 6 is provided with several pull-back capacitors 60 (the pull-back capacitors 60 can cooperate with the power inductor 32 (to improve the waveform) to form a high-efficiency LC filter, absorb transient voltage spikes and smooth voltage fluctuations, ensure the purity of the output voltage, and reduce the risk of system failure caused by voltage fluctuations), the pull-back capacitor board 6 can more effectively cope with dynamic load changes between the power board 3 and the main board 2. This layout allows the pull-back capacitors 60 to quickly respond to the needs of the main board 2 side, and at the same time, it can also help the power inductor board better manage its own energy needs.

[0053] like Figure 5 and Figure 6 As shown, this embodiment also includes a fan 4 53, located on one side of the pull-back capacitor plate 6. The fan blades of the fan 4 53 face the pull-back capacitor 60 and generate directional airflow to remove the heat generated by the pull-back capacitor 60, ensuring that its operating temperature is kept within the optimal range.

[0054] There are four fans 352 arranged in a row, working together with heatsink 4 to better promote the heat dissipation of power board 3.

[0055] This embodiment also includes: a balanced bridge inductor 70 and a balanced bridge inductor heat sink 71, the balanced bridge inductor heat sink 71 enclosing the balanced bridge inductor 70, the balanced bridge inductor 70 being located on one side of fan three 52; and fan five 54, fan five 54 being located on one side of the balanced bridge inductor heat sink 71.

[0056] like Figure 5 and Figure 6As shown, the balanced bridge inductor 70 generates heat during operation, especially under high load conditions. Excessive temperature can affect its performance and lifespan. Therefore, a heatsink 71 is used to enclose it to improve heat dissipation efficiency. The main task of fan 54 is to accelerate airflow on the surface of the heatsink, thereby removing heat more quickly. The airflow generated by fan 54 blows directly onto the heatsink, significantly improving heat dissipation efficiency. Simultaneously, fans 54 and 52 are positioned on either side of the heatsink 71. The combined operation of fans 54 and 52, along with the heatsink 71, further promotes heat dissipation of the balanced bridge inductor 70. The other side of fan 54 is the sidewall of the energy storage converter, with through-holes. Figure 5 As shown, the fan blades of the three fans 52 arranged in a row face the through hole, and the area between the three fans 52 and the side wall is only provided with a balanced bridge inductor heat sink 71. The device component arrangement in this embodiment can better promote heat dissipation of the components inside the housing 1, so that the components are in the best working condition.

[0057] It should be noted that, as Figure 3 As shown, the arrow points to the circuit where the power grid charges the battery via the PCS (e.g., the power grid or motor charges the battery, or it receives power from the photovoltaic panel): Static transfer switch connection terminal - common mode inductor 20 - leakage current sensor 21 - relay 22 - pull-back capacitor 60, power inductor 32 - inverter bridge 34 - bus capacitor (composed of bus capacitor 300 and bus capacitor 32) - circuit breaker 35 - battery. The battery discharge circuit via the PCS is exactly... Figure 3 The loops indicated by the arrows are reversed: Battery - Circuit Breaker 35 - Bus Capacitor (composed of Bus Capacitor 1 300 and Bus Capacitor 2 32) - Inverter Bridge 34 - Pull-back Capacitor 60, Power Inductor 32 - Relay 22 - Leakage Sensor 21 - Common Mode Inductor 20 - Static Transfer Switch Connection Terminal.

[0058] Example 2:

[0059] This second embodiment is mainly to realize the placement and stacking of PCS in the first embodiment. Specifically, this second embodiment includes an external bracket 8 with a receiving cavity 80. The receiving cavity 80 is used to store the energy storage converter. The top and bottom walls of the external bracket 8 are respectively provided with a first support foot 81 and a second support foot 82. The second support foot 82 is provided with a slot 820. Two adjacent external brackets 8 can be stacked by movably inserting the first support foot 81 into the slot 820.

[0060] Specifically, such as Figure 1 and Figure 2As shown, the receiving cavity 80 in this embodiment not only houses the energy storage converter (PCS), providing physical protection for the PCS and facilitating maintenance and expansion, but also provides excellent guidance and limiting effects during PCS placement, ensuring that the PSC can be accurately and securely fixed within the external bracket 8. Furthermore, when different PCS devices need to be stacked, the specific operating steps are as follows: Place the first PCS and its external bracket 8 according to... Figure 1 The structure shown is installed correctly. For the second PCS and its external bracket 8, the first support foot 8141 at the bottom is inserted into the slot 820 of the second support foot 82 at the top of the first bracket. Repeating the above steps allows for the stacking of more PCS units to form a multi-layer structure. This structure not only increases the stability and reliability of the system and avoids safety hazards caused by unstable stacking structures, but also facilitates power expansion (e.g., stacking different 100kW PCS units to expand to 500kW), improving the performance and efficiency of the entire energy storage system.

[0061] Preferably, such as Figure 2 As shown, in this second embodiment, an anti-detachment plate 83 can also be connected to the external bracket 8. The anti-detachment plate 83 is located on one side of the receiving cavity 80, making the receiving cavity 80 a semi-sealed design. With the design of the anti-detachment plate 83, not only is the stability of the PCS in the bracket increased, but the vibration resistance of the entire system is also improved. At the same time, it helps to make the installation of the PCS simpler and faster, and avoids the PCS from being misaligned in the receiving cavity 80, which would affect the stability and reliability of subsequent stacking and expansion.

[0062] More preferably, such as Figures 1 to 3 As shown, in this second embodiment, limiting plates 16 extend outward from both sides of the energy storage converter. During the installation of the PCS, the limiting plates 16 move against the external support 8, restricting the relative position of the PCS in the receiving cavity 80 and preventing displacement or shaking during operation, thereby improving the stability and reliability of the system. Combined with the dual fixing mechanism provided by the anti-detachment plate 83, the stability of the PCS in the support is further enhanced, and it can operate reliably even in complex environments.

[0063] More preferably, such as Figure 1 As shown, in this embodiment, handles 17 are symmetrically provided on the outer wall of the (PCS) housing 1, which allows the operator to easily pull the PCS out of the receiving cavity 80, simplifying the process of taking out and putting in the PCS, reducing the difficulty of operation, and improving work efficiency.

[0064] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0066] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An energy storage converter, characterized in that, include: The enclosure has DC input / output ports and AC input / output ports on its outer side wall; The motherboard, located inside the enclosure, is used to control the operation of the energy storage converter. A power board, electrically connected to the motherboard and located below the motherboard, is used for current conversion. The DC input / output port and the AC input / output port are electrically connected to the power board. The heat sink is located below and in contact with the power board; Fan 1 is located on one side of the motherboard; Fan 2 is located below the motherboard; Fan 3 is located on one side of the heat sink.

2. The energy storage converter according to claim 1, characterized in that, The motherboard is equipped with two levels of common mode inductors, a leakage current sensor, and a relay. The common mode inductor is positioned opposite to the first fan, and the second fan is positioned opposite to the common mode inductor.

3. The energy storage converter according to claim 1, characterized in that, The power board is equipped with a bus capacitor 2, an inverter bridge and a balanced bridge circuit composed of switching devices, and the inverter bridge and balanced bridge circuit are located below the power board and are in contact with the heat sink. The energy storage converter also includes a balance bridge inductor and a balance bridge inductor heat sink that are electrically connected to the balance bridge circuit. The balance bridge inductor heat sink encloses the balance bridge inductor and is located on one side of the fan. The energy storage converter also includes a fifth fan, which is located on the other side of the balanced bridge inductor heat sink.

4. The energy storage converter according to claim 1, characterized in that, It also includes a bus capacitor board, which is located on one side of the power board and electrically connected to the power board. The bus capacitor board is provided with a plurality of bus capacitors, and the fan blades of the fan face the area above the bus capacitors.

5. The energy storage converter according to claim 1, characterized in that, It also includes a power inductor board electrically connected to the motherboard. The power inductor board is located on the other side of the power board. The power inductor board is provided with a power inductor and a power inductor heat sink. The power inductor heat sink is located on one side of the heat sink and wraps around the power inductor.

6. The energy storage converter according to claim 5, characterized in that, It also includes a fan and a pullback capacitor board electrically connected to the power inductor board. The pullback capacitor board is located between the power inductor board and the main board, and the pullback capacitor board is provided with a plurality of pullback capacitors. The fourth fan is located on one side of the pull-back capacitor plate, and the fan blades of the fourth fan face the pull-back capacitor.

7. The energy storage converter according to claim 3, characterized in that, The number of fans 3 is 4, and they are arranged in a row.

8. An energy storage converter according to any one of claims 1-7, characterized in that, Ventilation holes are provided on the side walls and bottom of the enclosure, and copper pipes are installed inside the radiator.

9. An energy storage converter according to claim 8, characterized in that, The DC input / output port includes a battery connection port and an MPPT connection port, and the AC input / output port includes a static transfer switch connection port. The enclosure is also equipped with a display screen, a communication port, and a WiFi data acquisition stick connection port, all of which are electrically connected to the motherboard.

10. An energy storage converter according to any one of claims 1-7, characterized in that, It also includes an external bracket with a receiving cavity for housing the energy storage converter. The external bracket has a first support foot and a second support foot at the diagonal corners of its top and bottom walls, respectively. The second support foot has a slot, and two adjacent external brackets can be stacked by inserting the first support foot into the slot. The two side walls of the energy storage converter also extend outward with limiting plates, which move against the external support to limit the relative position of the energy storage converter within the receiving cavity.

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