Photovoltaic inverter case and energy storage system

Abstract

The utility model relates to the technical field of inverters, in particular to a photovoltaic inverter case and an energy storage system. Comprising a case main body, the case main body is provided with a mounting cavity and a connecting port, the periphery of the connecting port is provided with a tooth radiator and a heat dissipation air channel assembly, the tooth radiator is covered with the heat dissipation air channel assembly, and heat is discharged out of the case through forced convection. And the case is also provided with a built-in fan which works cooperatively with the heat dissipation part, so that heat dissipation is enhanced, and the temperature in the case is uniformly distributed. And a silica gel sealing strip is arranged at the connecting port of the case to prevent dust and water from entering. The energy storage system comprises a plurality of circuit boards which are reasonably arranged in the installation cavity, high-efficiency signal transmission and energy conversion are achieved, and the energy storage system has a grid-connected and off-grid switching function. The inductor assembly is arranged externally, temperature is reduced, and overheating damage is prevented. A ceramic gasket is arranged on the power conversion circuit board, so that the heat conduction effect is enhanced. The photovoltaic inverter case solves the problem that the existing photovoltaic inverter case is poor in heat dissipation effect under high-load operation, and is compact in structure and high in power density.

Description

Technical Field

[0001] This utility model relates to the field of inverter technology, specifically to a photovoltaic inverter chassis and energy storage system. Background Technology

[0002] A photovoltaic (PV) inverter is a transformer that converts the direct current (DC) power from photovoltaic (PV) panels into alternating current (AC) power. An energy storage inverter is a transformer that converts the power from a battery into AC power, and can also store the energy from the PV panels in the battery. With changing market demands, energy storage inverters are gradually becoming an important component of PV systems. They not only possess the functions of traditional PV inverters but also store excess energy in batteries, achieving energy storage and dispatch. Current integrated PV energy storage technology is still immature and primarily focuses on functional implementation.

[0003] Existing residential solar inverter enclosures are typically wall-mounted, relying on natural air cooling or simple internal fans for heat dissipation. While these systems function normally in low ambient temperatures, high-temperature, high-humidity, or enclosed environments, heat buildup inside the enclosure becomes difficult to dissipate effectively. This causes the inverter's operating temperature to rise continuously, impacting performance and stability. Increasing inverter power necessitates enlarging the enclosure to accommodate more electronic components, leading to increased costs. Utility Model Content

[0004] This invention provides a photovoltaic inverter chassis that solves the problem that existing photovoltaic inverter chassis rely solely on natural convection or a single fan for heat dissipation, resulting in poor heat dissipation under high load operation.

[0005] According to the present invention, a photovoltaic inverter chassis includes: a chassis body, the chassis body including a chassis shell and a heat dissipation part disposed on one side wall of the outer side of the chassis shell; the chassis shell is provided with a mounting cavity for installing electronic components of the photovoltaic inverter and a connection port communicating with the outside; the heat dissipation part includes a toothed heat sink disposed around the connection port and a heat dissipation duct assembly for blowing out the heat dissipated by the toothed heat sink; the heat dissipation duct assembly covers the toothed heat sink.

[0006] By incorporating a toothed heat sink and a heat dissipation duct assembly in this invention, the heat dissipation performance of the chassis is effectively improved, ensuring that electronic components can dissipate heat in a timely manner when operating at high efficiency, and avoiding performance degradation or damage caused by overheating.

[0007] By combining the connection port and the heat dissipation part in the chassis of this utility model, the photovoltaic inverter chassis can achieve efficient heat dissipation while maintaining a compact size, and can accommodate more or higher power electronic components in the same volume.

[0008] In this invention, the heat dissipation duct assembly includes a heat dissipation duct plate and an external fan assembly fastened to the bottom of the heat dissipation duct plate with screws. The air outlet of the external fan assembly faces the toothed heat sink. The end of the heat dissipation duct plate away from the external fan assembly is provided with heat dissipation holes for heat dissipation.

[0009] The unique toothed structure of the toothed heat sink in this invention can greatly increase the heat dissipation area and improve the heat dissipation efficiency. The air vent of the external fan assembly faces the toothed heat sink, and the heat dissipated by the toothed heat sink is blown out of the chassis through forced convection, ensuring that the internal temperature of the chassis is maintained within a reasonable range. The setting of the heat dissipation holes allows heat to be dissipated through the heat dissipation holes on the side away from the air vent.

[0010] In this utility model, the end of the chassis shell away from the heat dissipation part is provided with an opening communicating with the receiving cavity. A bracket is provided at the opening, and a cover plate assembly for opening and closing the chassis shell is provided. The cover plate assembly includes a closed cover plate connected to the opening and a decorative cover plate connected to the end of the closed cover plate away from the opening. The bracket and the cover plate assembly together close the mounting cavity.

[0011] The cover assembly of this utility model includes a closed cover and a decorative cover. The closed cover is used to close the opening and protect the internal components of the chassis from external interference; the decorative cover provides further protection. The opening and closing of the cover assembly makes the maintenance of the chassis simpler and more convenient, and internal maintenance can be carried out without disassembling the entire chassis.

[0012] In this invention, a built-in fan is provided at the bottom of the mounting cavity.

[0013] By incorporating a built-in fan at the bottom of the unit, this invention provides additional heat dissipation for the internal components of the chassis. Working in conjunction with the heat dissipation unit, it ensures a more uniform temperature distribution within the chassis, preventing localized overheating, improving the inverter's heat dissipation performance, and ensuring the stability of electronic components during high-efficiency operation.

[0014] In this utility model, a mounting panel is provided on the outer wall of the chassis housing away from the built-in fan, and an emergency stop switch and a DC switch are provided on the mounting panel.

[0015] The emergency stop switch and DC switch in this utility model facilitate emergency shutdown and DC power control for users, and the installation panel makes it easy for users to operate.

[0016] In this invention, a silicone sealing strip is provided on the outer periphery of the connection port near the heat dissipation part. The silicone sealing strip is used for sealing the connection between the heat dissipation part and the installation port.

[0017] In this invention, a silicone sealing strip is provided on the outer periphery of the connection port near the heat dissipation part. This is used to seal the connection between the heat dissipation part and the installation port, preventing dust and moisture from entering the chassis and ensuring the stable operation of the system.

[0018] This utility model also provides an energy storage system installed in the photovoltaic inverter chassis of this utility model, which includes: a capacitor circuit board, a control circuit board, a wiring circuit board, a power conversion circuit board and a grid-connected / off-grid switching circuit board; the capacitor circuit board is installed on the bottom left side of the mounting cavity, the control circuit board is installed on the bottom right corner of the mounting cavity, the wiring circuit board is installed on the upper part of the control circuit board, the power conversion circuit board is installed in the middle of the bottom of the mounting cavity, and the grid-connected / off-grid switching circuit board is installed on the upper part of the power conversion circuit board.

[0019] The energy storage system of this invention includes a capacitor circuit board, a control circuit board, a wiring circuit board, a power conversion circuit board, and a grid-connected / off-grid switching circuit board. These circuit boards are rationally arranged in the mounting cavity according to functional requirements, which makes the chassis compact and the power density high while ensuring high efficiency in signal transmission and energy conversion.

[0020] The grid-connected / off-grid switching circuit board in this invention enables the system to freely switch between grid-connected and off-grid modes, adapting to the needs of different application scenarios. When the grid is normal, the system can feed excess power back into the grid; when the grid fails, the system can quickly switch to off-grid mode to ensure continuous power supply.

[0021] In this invention, the energy storage system also includes inductor components disposed on the left and right sides of the heat dissipation section, and the inductor components are bolted to the chassis housing.

[0022] In this invention, the inductor components are arranged on the left and right sides of the heat dissipation section and bolted to the chassis shell. The inductor components are used for energy storage and filtering. The inductor components generate heat when working. The external arrangement can reduce the temperature of the inductor components and prevent them from being damaged or degraded due to overheating.

[0023] In this invention, a plurality of evenly distributed ceramic pads are provided on the side of the power conversion circuit board near the connection port.

[0024] In this invention, multiple evenly distributed ceramic pads are provided on the side of the power conversion circuit board near the connection port. The ceramic pads not only have good insulation properties, but also effectively conduct the heat generated by the power devices on the power conversion circuit board to the toothed heat sink, thereby enhancing the heat dissipation effect.

[0025] This utility model has a simple structure, a reasonable and compact spatial layout, small size, high power, and good heat dissipation. It integrates the functions of grid connection, off-grid, and energy storage. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a photovoltaic inverter chassis.

[0027] Figure 2 This is an exploded view of a photovoltaic inverter.

[0028] Figure 3 This is a schematic diagram showing the connection between the heat dissipation unit and the chassis.

[0029] Figure 4 This is a schematic diagram of an energy storage system.

[0030] Figure 5 This is a side view of the photovoltaic inverter chassis. Detailed Implementation

[0031] To further understand the content of this utility model, a detailed description of the utility model is provided in conjunction with the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the utility model.

[0032] Example 1

[0033] like Figure 1-5 As shown, this embodiment provides a photovoltaic inverter chassis, which includes: a chassis body, the chassis body including a chassis shell 100 and a heat dissipation part 200 disposed on one side wall of the chassis shell 100; the chassis shell 100 is provided with a mounting cavity 110 for mounting the electronic components of the photovoltaic inverter and a connection port 120 communicating with the outside; the heat dissipation part 200 includes a toothed heat sink 210 disposed around the connection port 120 and a heat dissipation air duct assembly 220 for blowing out the heat dissipated by the toothed heat sink 210; the heat dissipation air duct assembly 220 covers the toothed heat sink 210.

[0034] By setting the toothed heat sink 210 and the heat dissipation air duct assembly 220 in this embodiment, the heat dissipation performance of the chassis is effectively improved, ensuring that electronic components can dissipate heat in time when working efficiently, and avoiding performance degradation or damage caused by overheating.

[0035] In this embodiment, the combination of the chassis with the connection port 120 and the heat dissipation part 200 enables the photovoltaic inverter chassis to achieve efficient heat dissipation while maintaining a compact size, and can accommodate more or higher power electronic components in the same volume.

[0036] In this embodiment, the heat dissipation duct assembly 220 includes a heat dissipation duct plate 221 and an external fan assembly 222 fastened to the bottom of the heat dissipation duct plate 221 by screws. The air outlet of the external fan assembly 222 faces the toothed heat sink 210. The end of the heat dissipation duct plate 221 away from the external fan assembly 222 is provided with a heat dissipation hole 2211 for heat dissipation.

[0037] The unique toothed structure of the toothed heat sink 210 in this embodiment can greatly increase the heat dissipation area and improve the heat dissipation efficiency. The air vent of the external fan assembly 222 faces the toothed heat sink 210, and the heat dissipated by the toothed heat sink 210 is blown out of the chassis by forced convection, ensuring that the internal temperature of the chassis is maintained within a reasonable range. The setting of the heat dissipation hole 2211 allows heat to be dissipated through the heat dissipation hole 2211 on the side away from the air vent.

[0038] In this embodiment, the chassis housing 100 is provided with an opening 130 communicating with the mounting cavity 110 at one end away from the heat dissipation part 200. A bracket 150 and a cover plate assembly 140 for opening and closing the chassis housing 100 are provided at the opening 130. The cover plate assembly 140 includes a closing cover plate 141 connected to the opening 130 and a decorative cover plate 142 connected to the end of the closing cover plate 141 away from the opening 130. The bracket 150 and the cover plate assembly 150 together close the mounting cavity 110.

[0039] In this embodiment, the cover assembly 140 includes a closed cover 141 and a decorative cover 142. The closed cover 141 is used to close the opening 130 and protect the internal components of the chassis from external interference. The decorative cover 142 provides further protection. The cooperation between the cover assembly 140 and the bracket 150 makes the overall structure more stable and effectively protects the internal electronic components.

[0040] In this embodiment, a built-in fan 111 is provided at the bottom of the mounting cavity 110.

[0041] By incorporating a built-in fan 111 at the bottom in this embodiment, additional heat dissipation is provided for the inside of the chassis. Working in conjunction with the heat dissipation unit 200, the temperature distribution inside the chassis becomes more uniform, avoiding local overheating and improving the heat dissipation effect of the inverter, thus ensuring the stability of electronic components when operating at high efficiency.

[0042] In this embodiment, a mounting panel 230 is provided on the outer wall of the chassis housing 100 away from the built-in fan 111, and an emergency stop switch 231 and a DC switch 232 are provided on the mounting panel 230.

[0043] The emergency stop switch 230 and DC switch 240 in this embodiment facilitate emergency shutdown and DC power control for users, and the mounting panel 230 facilitates user operation.

[0044] In this embodiment, a silicone sealing strip 121 is provided on the periphery of the connection port 120 near the heat dissipation part 200. The silicone sealing strip 121 is used for sealing the connection between the heat dissipation part 200 and the installation port.

[0045] In this embodiment, a silicone sealing strip 121 is provided on the outer periphery of the connection port 120 near the heat dissipation part 200 for sealing the connection between the heat dissipation part 200 and the installation port, preventing dust and moisture from entering the chassis and ensuring the stable operation of the system.

[0046] This embodiment also provides an energy storage system installed in the photovoltaic inverter chassis of this embodiment, which includes: a capacitor circuit board 310, a control circuit board 320, a wiring circuit board 330, a power conversion circuit board 340, and a grid-connected / off-grid circuit switching board 350; the capacitor circuit board 310 is installed on the bottom left side of the mounting cavity 110, the control circuit board 320 is installed on the bottom lower right corner of the mounting cavity 110, the wiring circuit board 330 is installed on the upper part of the control circuit board 320, the power conversion circuit board 340 is installed in the middle of the bottom of the mounting cavity 110, and the grid-connected / off-grid circuit switching board 350 is installed on the upper part of the power conversion circuit board 340.

[0047] In this embodiment, the energy storage system 300 includes a capacitor circuit board 310, a control circuit board 320, a wiring circuit board 330, a power conversion circuit board 340, and a grid-connected / off-grid circuit switching board 350. These circuit boards are rationally arranged in the mounting cavity 110 according to functional requirements, which makes the chassis compact and the power density high while ensuring high efficiency in signal transmission and energy conversion.

[0048] The grid-connected / off-grid switching board 350 in this embodiment enables the system to freely switch between grid-connected and off-grid modes, adapting to the needs of different application scenarios. When the grid is normal, the system can feed excess power back into the grid; when the grid fails, the system can quickly switch to off-grid mode to ensure continuous power supply.

[0049] In this embodiment, the energy storage system 300 also includes inductor components 360 disposed on the left and right sides of the heat dissipation part 200, and the inductor components 360 are bolted to the chassis housing 100.

[0050] In this embodiment, the inductor assembly 360 is disposed on the left and right sides of the heat dissipation part 200 and bolted to the chassis housing 100. The inductor assembly 360 is used for energy storage and filtering. The inductor assembly 360 generates heat when it is working. The external placement can reduce the temperature of the inductor assembly 360 and prevent it from being damaged or its performance from degrading due to overheating.

[0051] In this embodiment, a plurality of uniformly distributed ceramic pads 341 are provided on the side of the power conversion circuit board 340 near the connection port 120.

[0052] In this embodiment, a plurality of uniformly distributed ceramic pads 341 are provided on the side of the power conversion circuit board 340 near the connection port 120. The ceramic pads 341 not only have good insulation properties, but also effectively conduct the heat generated by the power devices on the power conversion circuit board 340 to the toothed heat sink 210, thereby enhancing the heat dissipation effect.

[0053] In practical use, the electronic components of the energy storage system 300 generate a large amount of heat. This heat is first transferred from the surface of the components to the chassis 100 in contact with them or remains inside the chassis 100 via thermal conduction. At this time, the airflow generated by the built-in fan 111 helps to circulate the hot air inside the chassis to the connection port 120. Simultaneously, the ceramic pads 341 on the power conversion circuit board 340 rapidly transfer the heat generated by the power devices to the toothed heat sink 210 via thermal conduction, accelerating the heat transfer process. As the main heat dissipation component 200, the toothed heat sink 210's unique toothed structure greatly increases the heat dissipation area and improves heat dissipation efficiency. After the heat is conducted to the toothed heat sink 210 through the connection port 120, the toothed heat sink 210 quickly disperses the heat across its entire surface. After the external fan assembly 222 is activated, it generates a powerful airflow. This airflow blows across the surface of the toothed heat sink 210 through the heat dissipation duct plate 221, quickly carrying away the heat from the toothed heat sink 210 and expelling it outside the chassis.

[0054] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

[0055] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A photovoltaic inverter chassis, comprising a chassis body, characterized in that: The main body of the chassis includes a chassis shell (100) and a heat dissipation part (200) disposed on one side wall outside the chassis shell (100); the chassis shell (100) is provided with a mounting cavity (110) for installing electronic components of the photovoltaic inverter and a connection port (120) communicating with the outside; the heat dissipation part (200) includes a toothed heat sink (210) disposed around the connection port (120) and a heat dissipation duct assembly (220) for blowing out the heat dissipated by the toothed heat sink (210); heat dissipation duct assembly (220).

2. The photovoltaic inverter chassis according to claim 1, characterized in that: The heat dissipation duct assembly (220) includes a heat dissipation duct plate (221) and a plurality of external fan assemblies (222) fastened to the bottom of the heat dissipation duct plate (221) by screws, with the air vents of the external fan assemblies (222) facing the toothed heat sink (210). The heat dissipation duct plate (221) has a heat dissipation hole (2211) at the end away from the external fan assembly (222) to dissipate heat.

3. A photovoltaic inverter chassis according to claim 1, characterized in that: The chassis housing (100) has an opening (130) at one end away from the heat dissipation part (200) that communicates with the mounting cavity (110). A bracket (150) is provided at the opening (130), and a cover plate assembly (140) for opening and closing the chassis housing (100). The cover plate assembly (140) includes a closed cover plate (141) connected to the opening (130) and a decorative cover plate (142) connected to the end of the closed cover plate (141) away from the opening (130). The bracket (150) and the cover plate assembly (140) together close the mounting cavity (110).

4. A photovoltaic inverter chassis according to claim 1, characterized in that: The mounting cavity (110) has a built-in fan (111) at the bottom.

5. A photovoltaic inverter chassis according to claim 4, characterized in that: The chassis (100) has a mounting panel (230) on the outer wall away from the built-in fan (111). The mounting panel is equipped with an emergency stop switch (231) and a DC switch (232).

6. A photovoltaic inverter chassis according to claim 1, characterized in that: A silicone sealing strip (121) is provided on the outer periphery of the connection port (120) near the heat dissipation part (200). The silicone sealing strip (121) is used for sealing the connection between the heat dissipation part (200) and the connection port (120).

7. An energy storage system, characterized in that: Installed in a photovoltaic inverter chassis according to any one of claims 1-6.

8. An energy storage system according to claim 7, characterized in that: The energy storage system includes a capacitor circuit board (310), a control circuit board (320), a wiring circuit board (330), a power conversion circuit board (340), and a grid-connected / off-grid switching circuit board (350). The capacitor circuit board (310) is installed on the bottom left side of the mounting cavity (110), the control circuit board (320) is installed on the bottom right corner of the mounting cavity (110), the wiring circuit board (330) is installed on the upper part of the control circuit board (320), the power conversion circuit board (340) is installed in the middle of the bottom of the mounting cavity (110), and the grid-connected / off-grid switching circuit board (350) is installed on the upper part of the power conversion circuit board (340).

9. An energy storage system according to claim 8, characterized in that: The energy storage system also includes inductor components (360) located on the left and right sides of the heat dissipation section (200), which are bolted to the chassis housing (100).

10. An energy storage system according to claim 8, characterized in that: Multiple evenly distributed ceramic pads (341) are provided on the side of the power conversion circuit board (340) near the connection port (120).

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