Balcony photovoltaic energy storage system

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a balcony photovoltaic energy storage system. The photovoltaic module comprises a battery module, a battery management mainboard, a PVHUB board, a photovoltaic input connector and a DC output connector, the battery module is connected with the battery management mainboard, an MCU, a first MOS tube, a second MOS tube and a third MOS tube are arranged in the PVHUB board, the MCU is connected with and controls the first MOS tube, the second MOS tube and the third MOS tube to be switched on and switched off, one end of the first MOS tube is connected with the photovoltaic input connector, and the other end of the first MOS tube is connected with the DC output connector. The other end of the first MOS tube is respectively connected with one end of the second MOS tube and one end of the third MOS tube, the other end of the second MOS tube is connected with the DC output connector, and the other end of the third MOS tube is connected with the battery management mainboard. Through MOS tube control of the PVHUB board, solar energy utilization of the residential area is realized, and electric charge loss of residents in the residential area is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to a balcony photovoltaic energy storage system. Background Art

[0002] Solar energy, as a clean energy source, is widely used not only in industry and commerce but also in homes. Photovoltaic energy storage combines a solar photovoltaic power generation system with energy storage technology. Currently, most home photovoltaic energy storage systems are designed for use in villas and other open spaces with ample sunlight. However, their application in residential communities is relatively limited. Because residential balconies are relatively small and photovoltaic input power is relatively low, there is a need for a micro-photovoltaic energy storage system for home balconies that can meet users' basic electricity needs.

[0003] A photovoltaic energy storage system combines a solar photovoltaic power generation system with energy storage technology, storing the electricity generated by photovoltaic power generation so that it can be supplied when needed. The electricity generated by the photovoltaic power generation system first meets its own load, and any excess electricity can be sold to an external grid company. If the photovoltaic power generation is insufficient to meet the load, it is supplemented by electricity from the external grid. Given the differences in electricity usage time and prices, the timeliness of photovoltaic power generation, and the timing of micro-inverter power generation, the balcony energy storage system allows users to customize the charging and discharging time and power, maximizing the utilization rate of the photovoltaic panels while reducing user electricity costs. This allows for optimally arranging charging and discharging time periods, thereby achieving maximum economic value. Utility Model Content

[0004] The utility model provides a balcony photovoltaic energy storage system, aiming to provide an energy storage device suitable for families in residential areas.

[0005] The utility model provides a balcony photovoltaic energy storage system, comprising a battery module, a battery management mainboard, a PVHUB board, a photovoltaic input connector for an external photovoltaic panel, and a DC output connector for an external inverter. The battery module is connected to the battery management mainboard. The PVHUB board is provided with an MCU, a first MOS tube, a second MOS tube, and a third MOS tube. The MCU connects and controls the closing and opening of the first MOS tube, the second MOS tube, and the third MOS tube. One end of the first MOS tube is connected to the photovoltaic input connector, the other end of the first MOS tube is respectively connected to one end of the second MOS tube and the third MOS tube, the other end of the second MOS tube is connected to the DC output connector, and the other end of the third MOS tube is connected to the battery management mainboard.

[0006] As a further improvement of the present invention, when the photovoltaic panel is discharging, the first MOS tube, the second MOS tube, and the third MOS tube are all closed; when the photovoltaic panel only charges the battery module, the first MOS tube is closed, the second MOS tube is disconnected, and the third MOS tube is closed; when the photovoltaic panel stops charging the battery module and supplies power to the DC output connector, the first MOS tube is closed, the second MOS tube is closed, and the third MOS tube is disconnected; when the photovoltaic panel has no power input for a long time and starts the battery module to supply power to the DC output connector, the first MOS tube is closed, the second MOS tube is closed, and the third MOS tube is closed.

[0007] As a further improvement of the present invention, the balcony photovoltaic energy storage system also includes a parallel socket for connecting multiple balcony photovoltaic energy storage systems in parallel, and the parallel socket is connected to the battery management mainboard.

[0008] As a further improvement of the present invention, the balcony photovoltaic energy storage system also includes a box and a base. The box and the base are sealed and connected to form a chamber. The battery module, battery management main board, and PVHUB board are installed in the chamber. The photovoltaic input connector and DC output connector are installed on the box.

[0009] As a further improvement of the present invention, the balcony photovoltaic energy storage system further includes a heat sink, which is mounted on the box and in contact with the PVHUB board.

[0010] As a further improvement of the present invention, the balcony photovoltaic energy storage system also includes a ventilation valve, which is connected to the base and communicates with the chamber.

[0011] As a further improvement of the present invention, the balcony photovoltaic energy storage system also includes a communication adapter board for output transmission, and the communication adapter board is respectively connected to the PVHUB board and the battery management main board.

[0012] As a further improvement of the present invention, the balcony photovoltaic energy storage system also includes a WIFI module, which is respectively connected to the PVHUB board and the battery management main board.

[0013] As a further improvement of the present invention, the balcony photovoltaic energy storage system also includes a PVHUB light panel and a battery light panel. The PVHUB light panel is connected to the PVHUB board, and the battery light panel is connected to the battery management main board.

[0014] As a further improvement of the present invention, the balcony photovoltaic energy storage system also includes a switch button, which is connected to the battery management mainboard.

[0015] The beneficial effects of the utility model are: by controlling the MOS tube of the PVHUB board, the photovoltaic energy storage mode is switched under different circumstances, the energy storage efficiency is improved to the maximum extent, the solar energy of the residential area is utilized, the electricity loss of the residents of the community is reduced, and economic benefits are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the overall structural diagram of the utility model balcony photovoltaic energy storage system from the front view;

[0017] Figure 2 This is the overall structural diagram of the utility model balcony photovoltaic energy storage system from the back perspective;

[0018] Figure 3 This is an exploded diagram of the structure of the balcony photovoltaic energy storage system of the utility model;

[0019] Figure 4 This is the functional circuit diagram of the balcony photovoltaic energy storage system of the utility model;

[0020] Figure 5 It is a schematic diagram of the cooperation between the balcony photovoltaic energy storage system of the utility model and the external system;

[0021] Figure 6 It is a structural schematic diagram of multiple balcony photovoltaic energy storage systems connected in parallel in the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 5 As shown, a balcony photovoltaic energy storage system of the present invention includes a battery module 1, a battery management mainboard 2, a PVHUB board 3, a photovoltaic input connector 4 for an external photovoltaic panel, and a DC output connector 5 for an external inverter. The battery module 1 is connected to the battery management mainboard 2. The PVHUB board 3 is provided with an MCU, a first MOS tube, a second MOS tube, and a third MOS tube. The MCU connects and controls the closing and opening of the first MOS tube, the second MOS tube, and the third MOS tube. One end of the first MOS tube is connected to the photovoltaic input connector 4, and the other end of the first MOS tube is respectively connected to one end of the second MOS tube and the third MOS tube. The other end of the second MOS tube is connected to the DC output connector 5, and the other end of the third MOS tube is connected to the battery management mainboard 2.

[0024] The battery management system (BMS) 2 manages battery data and provides enhanced battery protection. The PVHUB board 3 (balcony photovoltaic energy storage control board) controls various functions, enabling better utilization of photovoltaics and achieving greater economic value. The DC output connector 5 connects to a microinverter, transmitting photovoltaic electricity to the grid, thereby realizing economic value. The photovoltaic input connector 4 connects to the photovoltaic panel, converting solar energy into electrical energy for storage in the battery or distribution to the grid. The DC output connector 5 is equipped with a sealing gasket and threads and secured to the housing 7 with a nut. The photovoltaic input connector 4 is equipped with a sealing gasket and threads and secured to the housing 7 with a nut. The base 8 has a groove, which allows you to grasp the groove with both hands and directly lift the entire battery system.

[0025] When the photovoltaic panel is discharging, the first MOS tube, the second MOS tube, and the third MOS tube are all closed; when the photovoltaic panel only charges the battery module 1, the first MOS tube is closed, the second MOS tube is disconnected, and the third MOS tube is closed; when the photovoltaic panel stops charging the battery module 1 and supplies power to the DC output connector 5, the first MOS tube is closed, the second MOS tube is closed, and the third MOS tube is disconnected; when the photovoltaic panel has no power input and starts the battery module 1 to supply power to the DC output connector 5, the first MOS tube is closed, the second MOS tube is closed, and the third MOS tube is closed.

[0026] The PVHUB board 3, controlled by the MCU, shuts down the MOS and completes the mode switch. The inverter (INV) has a built-in DC-AC module for AC-to-DC conversion. The battery management board 2 (BMS) can be built into the battery pack 1 (Batterypack) to monitor and output the batteries.

[0027] In discharge mode, the first, second, and third MOS transistors are all closed. When PV power is sufficient, PV prioritizes the DC output (DC output power is configurable), with excess power used to charge the battery. When PV power is insufficient, both the battery and PV power supply the DC output. When the battery charge falls below a certain level, the battery is disconnected (the MCU controls the second MOS transistor to disconnect), leaving only PV power output, reducing power output.

[0028] In charging mode, when PV prioritizes battery charging, the first MOSFET is closed, the second MOSFET is disconnected, and the third MOSFET is closed. Once the battery is fully charged, charging is disconnected, and the first MOSFET is closed, the second MOSFET is closed, and the third MOSFET is disconnected, switching to PV for DC output power. If PV input is detected to have been absent for a certain period of time, and the specified discharge time has elapsed, battery discharge is initiated, with the first MOSFET closed, the second MOSFET closed, and the third MOSFET closed. In the absence of PV input, the battery charge automatically shuts down if the battery level drops below a certain level. When PV input is restored, battery charging is prioritized, with the first MOSFET closed, the second MOSFET disconnected, and the third MOSFET closed.

[0029] like Figure 6 As shown, the balcony photovoltaic energy storage system also includes a parallel socket 6 for connecting multiple balcony photovoltaic energy storage systems in parallel. This socket 6 is connected to the battery management mainboard 2. When the user's photovoltaic power generation is sufficient and power consumption is high, multiple batteries can be connected in parallel to increase the capacity of the home's energy storage. This is achieved through the parallel socket 6, which is equipped with a sealing gasket and screw threads and secured to the housing 7 with a nut.

[0030] The balcony photovoltaic energy storage system also includes a housing 7 and a base 8. These two components are sealed together to form a chamber. The battery module 1, battery management board 2, and PVHUB board 3 are installed within the chamber. The photovoltaic input connector 4 and DC output connector 5 are mounted on the housing 7. The housing 7 and base 8 are used to house the batteries and other internal components. The housing 7 and base 8 are connected by a sealing gasket 9, which is applied with waterproof adhesive and adhered directly to the housing 7.

[0031] The battery module 1 is used to store or release electricity in the system. Figure 3 The system contains two battery modules 1. The first battery module 1 has openings at both ends and is fixed to the base 8 by screws. The second battery module 1 is fixed to the module bracket 20 by screws, and the module bracket 20 is fixed to the base 8 by screws.

[0032] The balcony photovoltaic energy storage system also includes a heat sink 10, which is mounted on the housing 7 and in contact with the PVHUB board 3. This heat sink 10 dissipates heat from the PVHUB, maintaining the board 3 at a suitable operating temperature. The system includes a top heat sink 11 and side heat sinks 12. The side heat sinks 12 are equipped with nuts and secured to the top heat sink 11 via screws and thermal adhesive. The top heat sink 11 is secured to the housing 7 with screws through screw holes. The top heat sink 11 also features a boss that conducts heat to the PVHUB board 3 via thermal adhesive, achieving thermal equilibrium between the board's interior and the surrounding environment.

[0033] The balcony photovoltaic energy storage system also includes a vent valve 13, which is connected to the base 8 and communicates with the chamber. The vent valve 13 itself is equipped with a plastic nut and locks to the base 8. When the internal battery changes and emits gas, the pressure is released through the vent valve 13 to prevent explosion.

[0034] The balcony photovoltaic energy storage system also includes a WIFI module 14, which is connected to the PVHUB board 3 and the battery management main board 2. The WIFI module 14 enables communication between the system and the server and APP to upload data.

[0035] The balcony photovoltaic energy storage system also includes a switch button 15, which is connected to the battery management mainboard 2. The switch button 15 is used to control the opening or closing of the battery.

[0036] The switch button 15 is provided with a sealing gasket and is fixed to the box body 7 by a nut. The WIFI module 14 is provided with a sealing gasket and a thread and is fixed to the box body 7 by a nut.

[0037] The balcony photovoltaic energy storage system also includes a communication adapter board 16 for output transmission. The communication adapter board 16 is connected to the PVHUB board 3 and the battery management main board 2. The communication adapter board 16 is used to transmit data with the battery, PVHUB, and parallel machine.

[0038] The balcony photovoltaic energy storage system also includes a PVHUB light panel 17 and a battery light panel 18. The PVHUB light panel 17 is connected to the PVHUB board 3, and the battery light panel 18 is connected to the battery management board 2. The PVHUB light panel 17 displays the PVHUB status, while the battery light panel 18 displays the battery status. The system also includes a lens 19, which allows light to pass through while preventing water from entering the light holes. The housing 7 is equipped with PCBA studs, which secure the battery management board 2, communication adapter board 16, PVHUB light panel 17, battery light panel 18, and PVHUB board 3 to the housing 7 using screws. The lens 19 is coated with waterproof adhesive and adheres to the housing 7.

[0039] This balcony photovoltaic energy storage system has the following advantages:

[0040] (1) Realize the utilization of solar energy in residential areas, reduce the electricity loss of residents, and achieve economic benefits;

[0041] (2) It is easy for users to carry and install and wire without drilling;

[0042] (3) Controlled by the MOS tube of PVHUB board 3 instead of relay control, thus reducing costs;

[0043] (4) The balcony micro-storage system is equipped with a parallel connection interface, which can realize the parallel connection of battery capacity. Users can choose the number of balcony micro-storage systems according to their power needs;

[0044] (5) The balcony micro-storage system is designed with internal heat transfer and heat conduction. The entire system has good sealing performance and can withstand complex natural environments, such as wind and rain;

[0045] (6) The balcony micro-storage system is equipped with a WIFI connection APP. Users can set the charging and discharging time and power on the APP to maximize the utilization rate of photovoltaic panels and achieve greater economic benefits.

[0046] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A balcony photovoltaic energy storage system, characterized in that: The system includes a battery module, a battery management mainboard, a PVHUB board, a photovoltaic input connector for an external photovoltaic panel, and a DC output connector for an external inverter. The battery module is connected to the battery management mainboard. The PVHUB board is provided with an MCU, a first MOS tube, a second MOS tube, and a third MOS tube. The MCU connects and controls the closing and opening of the first MOS tube, the second MOS tube, and the third MOS tube. One end of the first MOS tube is connected to the photovoltaic input connector, and the other end of the first MOS tube is respectively connected to one end of the second MOS tube and the third MOS tube. The other end of the second MOS tube is connected to the DC output connector, and the other end of the third MOS tube is connected to the battery management mainboard.

2. The balcony photovoltaic energy storage system according to claim 1, characterized in that: When the photovoltaic panel is discharging, the first MOS tube, the second MOS tube, and the third MOS tube are all closed; when the photovoltaic panel only charges the battery module, the first MOS tube is closed, the second MOS tube is disconnected, and the third MOS tube is closed; When the photovoltaic panel stops charging the battery module and supplies power to the DC output connector, the first MOS transistor is closed, the second MOS transistor is closed, and the third MOS transistor is disconnected; When the photovoltaic panel has no power input continuously and the battery module is started to supply power to the DC output connector, the first MOS transistor is closed, the second MOS transistor is closed, and the third MOS transistor is closed.

3. The balcony photovoltaic energy storage system according to claim 1, characterized in that: It also includes a parallel socket for connecting multiple balcony photovoltaic energy storage systems in parallel, and the parallel socket is connected to the battery management mainboard.

4. The balcony photovoltaic energy storage system according to claim 1, characterized in that: It also includes a box body and a base. The box body and the base are sealed and connected to form a cavity. The battery module, battery management main board, and PVHUB board are installed in the cavity. The photovoltaic input connector and DC output connector are installed on the box body.

5. The balcony photovoltaic energy storage system according to claim 4, characterized in that: The box also includes a heat sink, which is mounted on the box body and contacts the PVHUB board.

6. The balcony photovoltaic energy storage system according to claim 4, characterized in that: It also includes a breathable valve, which is connected to the base and communicates with the chamber.

7. The balcony photovoltaic energy storage system according to claim 1, characterized in that: It also includes a communication adapter board for output transmission, and the communication adapter board is connected to the PVHUB board and the battery management main board respectively.

8. The balcony photovoltaic energy storage system according to claim 1, characterized in that: It also includes a WIFI module, which is connected to the PVHUB board and the battery management main board respectively.

9. The balcony photovoltaic energy storage system according to claim 1, characterized in that: It also includes a PVHUB light board and a battery light board. The PVHUB light board is connected to the PVHUB board, and the battery light board is connected to the battery management main board.

10. The balcony photovoltaic energy storage system according to claim 1, characterized in that: It also includes a switch button, which is connected to the battery management mainboard.

Images