Household photovoltaic energy storage inverse control all-in-one machine

Abstract

The utility model provides a household photovoltaic energy storage inverse control all-in-one machine, which comprises a cabinet, a plurality of horizontal partition plates are arranged in the cabinet from top to bottom, the horizontal partition plates divide the interior of the cabinet into a plurality of empty cabins, each empty cabin comprises a device placement cabin and a battery placement cabin below the device placement cabin, and vertical partition plates distributed from left to right are arranged in the device placement cabin. A vertical partition plate is arranged in the device placement cabin and divides the interior of the device placement cabin into a front placement cabin and a rear placement cabin, a photovoltaic direct current input MPPT controller and a dual-power-supply conversion controller are arranged on the vertical partition plate in the front placement cabin, an alternating current and direct current converter and an inverter are arranged in the rear placement cabin, and an energy storage battery and a battery controller are fixedly arranged in the battery placement cabin. By optimizing the internal structure layout and the function module design, the overall performance of the system is improved, efficient utilization of photovoltaic electric energy and intelligent management of the energy storage battery are achieved, energy storage requirements of different capacities can be flexibly met, meanwhile, an effective fault handling mechanism is additionally arranged, and it is ensured that a user can still continuously use electricity when the system breaks down.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation and energy storage technology, specifically to a household photovoltaic energy storage inverter control integrated machine. Background Technology

[0002] Currently, residential photovoltaic (PV) power generation systems commonly suffer from the problem of decentralized equipment. The DC power generated by the PV panels must be processed by multiple independent devices, such as controllers, inverters, and energy storage units. This leads to complex system installation, high installation and commissioning costs, and requires highly skilled installers, hindering widespread adoption. Furthermore, compatibility between these independent devices is difficult to guarantee, making them prone to malfunctions during collaborative operation and reducing the overall stability and reliability of the system. Moreover, traditional systems have low efficiency in utilizing PV power, failing to fully leverage the power generation capacity of the PV panels, and the management of energy storage batteries is not intelligent enough, affecting battery lifespan. When the system fails, there is often a lack of effective backup power switching mechanisms, easily leading to power outages for users. Existing inverters have limitations in power output range and application scenarios, making it difficult to meet the diverse electricity needs of households and emerging demands such as electric vehicle charging. In addition, most devices are not suitable for outdoor placement, limiting their installation location and usage flexibility. Therefore, these problems urgently need to be addressed. Utility Model Content

[0003] To address the technical problems of existing residential photovoltaic (PV) power generation systems, such as dispersed equipment, high cost, complex installation, poor compatibility, low efficiency, and insufficient intelligence, this invention provides a highly integrated residential PV energy storage inverter and controller. By optimizing the internal structural layout and functional module design, it improves the overall system performance, achieving efficient utilization of PV power and intelligent management of the energy storage battery, while flexibly adapting to different energy storage capacity requirements. Furthermore, it incorporates an effective fault response mechanism to ensure continuous power supply for users in the event of system failure.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A residential photovoltaic energy storage inverter and control integrated unit includes a cabinet. Multiple horizontal partitions are arranged from top to bottom inside the cabinet, dividing the interior into multiple empty compartments. Each empty compartment includes a device placement compartment and a battery placement compartment located below the device placement compartment. Vertical partitions, arranged from left to right, divide the device placement compartment into a front placement compartment and a rear placement compartment. A photovoltaic DC input MPPT controller and a dual power conversion controller are fixedly mounted on the vertical partition in the front placement compartment. An AC / DC converter and an inverter are fixedly mounted in the rear placement compartment. A battery placement compartment contains... The system includes an energy storage battery and a battery controller. The input terminal of the photovoltaic DC input MPPT controller is adapted to connect to DC power generated by existing photovoltaic panels. The output terminal of the photovoltaic DC input MPPT controller is connected to the first input terminal of the battery controller. The input terminals of the dual power conversion controller and the AC / DC converter are adapted to connect to mains power. The output terminal of the AC / DC converter is connected to the second input terminal of the battery controller. The first output terminal of the battery controller is connected to the energy storage battery. The second output terminal of the battery controller is connected to the dual power conversion controller via an inverter. The output terminal of the dual power conversion controller outputs power for the user.

[0006] Compared with existing technologies, the household photovoltaic energy storage inverter and controller integrated unit provided by this utility model has the following advantages: 1) The cabinet interior is divided into multiple empty compartments by horizontal partitions. Each empty compartment includes a device placement compartment and a battery placement compartment located below the device placement compartment. The device placement compartment is further divided into a front placement compartment and a rear placement compartment by vertical partitions. A photovoltaic DC input MPPT controller and a dual power conversion controller are fixedly installed on the vertical partitions in the front placement compartment. An AC-DC converter and an inverter are fixedly installed in the rear placement compartment. Energy storage batteries and a battery controller are fixedly installed in the battery placement compartment. This layout reduces internal wiring interference and facilitates connection and maintenance. 2) It integrates multiple functions such as control, inversion, and energy storage into one unit, reducing the number of devices, shrinking the footprint, and lowering installation complexity and cost. Users can complete the initial installation and connection without professional knowledge. It can also be placed outdoors, with more flexible installation location selection. Therefore, it has a high degree of integration and is easy to install. 3) The photovoltaic DC input MPPT controller significantly improves the power generation efficiency of photovoltaic panels, and the intelligent charging and discharging strategy of the battery controller reduces energy waste. Compared with traditional systems, the overall energy utilization rate can be improved by about 10%-20%, resulting in high efficiency and energy saving. 4) Each functional module has comprehensive protection functions, which can effectively ensure the safety of equipment and users' electricity use, reduce the risk of failure, and improve safety. 5) The internal space of the battery storage compartment can be flexibly configured with battery combinations of different capacities, which can meet the needs of users with different energy storage requirements from low to high, enhancing the versatility and market adaptability of the equipment. The inverter's wide power output range of 5-30KW, as well as single-phase and three-phase output modes, can meet the diverse electricity use needs of households and electric vehicle charging scenarios, providing users with a convenient, reliable, and flexible clean energy usage solution with strong adaptability. 6) The dual power conversion controller can switch to the mains power system in time when the system fails, forming an effective fault response mechanism, ensuring the continuity of power supply for users, improving the reliability of the system and the user experience, and is especially suitable for scenarios with high requirements for power supply stability.

[0007] Furthermore, the cabinet is a metal box-type upright cabinet, and the bottom of the cabinet is equipped with swivel casters with brakes.

[0008] Furthermore, louvers are provided on the left and right bulkheads of the empty cabin, and temperature-controlled exhaust fans are installed on the bulkheads inside the louvers.

[0009] Furthermore, two battery placement compartments are arranged vertically below the device placement compartment.

[0010] Furthermore, a horizontal partition is fixedly installed inside the rear installation compartment, which divides the interior of the rear installation compartment into an upper installation compartment and a lower installation compartment. The inverter includes an inverter transformer and an inverter control circuit board that are connected to each other. The inverter control circuit board is fixedly installed in the upper installation compartment, and the inverter transformer and AC / DC converter are installed in the lower installation compartment.

[0011] Furthermore, the vertical bulkhead inside the forward mounting compartment is also fixedly equipped with an AC output controller, an AC input controller, an inverter DC protector, an inverter AC output protector, a photovoltaic DC charging protector, a mains input protector, a mains charging controller, a charging DC voltage controller, and a DC monitor. The input and output terminals of the AC output controller are respectively connected to the inverter output and the electrical load. The input and output terminals of the AC input controller are respectively connected to the mains power and the mains input protector. The input and output terminals of the inverter DC protector are respectively connected to the energy storage battery and the inverter. The input and output terminals of the AC output protector are connected to the electrical load and the inverter, respectively. The input and output terminals of the photovoltaic DC charging protector are connected to the photovoltaic panel and the photovoltaic DC input MPPT controller, respectively. The input and output terminals of the mains input protector are connected to the mains power, the inverter, and the AC / DC converter, respectively. The input and output terminals of the mains charging controller are connected to the mains input protector and the AC / DC converter, respectively. The input and output terminals of the charging DC voltage controller are connected to the AC / DC converter and the energy storage battery, respectively. The input and output terminals of the DC monitor are connected to the inverter and the energy storage battery, respectively.

[0012] Furthermore, the AC input controller, AC output controller, AC mains charging controller, and DC monitor are also equipped with communication modules. Attached Figure Description

[0013] Figure 1 This is a frontal spatial layout diagram of the household photovoltaic energy storage inverter control integrated machine provided by this utility model.

[0014] Figure 2 This is a diagram showing the internal rear space layout of the household photovoltaic energy storage inverter control integrated machine provided by this utility model.

[0015] Figure 3 This is a functional module connection diagram of the household photovoltaic energy storage inverter control integrated system provided by this utility model.

[0016] Figure 4 This is a side view of the integrated photovoltaic energy storage and inverter control unit for residential use provided by this utility model.

[0017] In the diagram: 1. Cabinet; 2. Horizontal partition; 3. Component mounting compartment; 31. Front mounting compartment; 3101. Photovoltaic DC input MPPT controller; 3102. Dual power conversion controller; 3103. AC output controller; 3104. AC input controller; 3105. Inverter DC protector; 3106. Inverter AC output protector; 3107. Photovoltaic DC charging protector; 3108. Mains input protector; 3109. Mains charging controller; 3110. Charging DC voltage controller; 3111. DC monitor; 32. Rear mounting compartment; 321. AC / DC converter; 322. Inverter; 3221. Inverter transformer; 3222. Inverter control circuit board; 4. Battery mounting compartment; 41. Energy storage battery; 42. Battery controller; 5. Vertical partition; 6. Universal casters; 7. Louvers; 8. Exhaust fan; 9. Horizontal partition. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0019] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please refer to Figures 1 to 3As shown, this utility model provides a residential photovoltaic energy storage inverter control integrated machine, including a cabinet 1 with a door. The cabinet 1 has multiple horizontal partitions 2 arranged from top to bottom, dividing the interior into multiple empty compartments. Each empty compartment includes a device placement compartment 3 and a battery placement compartment 4 located below the device placement compartment 3. The device placement compartment 3 has vertical partitions 5 arranged from left to right, dividing it into a front placement compartment 31 and a rear placement compartment 32. A photovoltaic DC input MPPT controller 3101 and a dual power conversion controller 3102 are fixedly mounted on the vertical partition 5 in the front placement compartment 31. An AC / DC converter 321 and an inverter 322 are fixedly mounted in the rear placement compartment 32. An energy storage battery is fixedly placed in the battery placement compartment 4. The photovoltaic DC input MPPT controller 3101 has an input terminal adapted to connect to the DC power generated by existing photovoltaic panels (installed on the user's roof). The output terminal of the photovoltaic DC input MPPT controller 3101 is connected to the first input terminal of the battery controller 42. The input terminals of the dual power conversion controller 3102 and the AC-DC converter 321 are adapted to connect to the mains power (AC220V). The output terminal of the AC-DC converter 321 is connected to the second input terminal of the battery controller 42. The first output terminal of the battery controller 42 is connected to the energy storage battery 41. The second output terminal of the battery controller 42 is connected to the dual power conversion controller 3102 via the inverter 322. The output terminal of the dual power conversion controller 3102 outputs the user's electricity. The photovoltaic DC input MPPT controller 3101 utilizes maximum power point tracking (MPPT) technology to monitor the voltage and current output of the photovoltaic panel in real time. By adjusting circuit parameters, it keeps the photovoltaic panel operating near its maximum power point, improving power generation efficiency. The generated electricity is input to the battery controller 42 to charge the energy storage battery 41. It is adaptable to various photovoltaic panel specifications and can be implemented using the existing TYC-60A96 photovoltaic MPPT control module. The dual power conversion controller 3102, as a crucial component of the control circuit, monitors the operating status of the residential photovoltaic energy storage inverter integrated unit in real time. When a system fault is detected, such as abnormal photovoltaic panel power generation, inverter failure, or inability of the energy storage battery to supply power, the dual power conversion controller will respond quickly, automatically switching to the mains power system and connecting the mains power to the load circuit to ensure continuous power supply for the user and avoid power outages caused by system faults. After the system fault is cleared, the dual power conversion controller can also automatically or manually switch back to the photovoltaic energy storage power supply mode according to preset conditions. This can be implemented using the existing W2R-100II dual power controller. The AC / DC converter 321 is used to convert AC mains power into DC power and then input it into the battery controller 42 to control the charging of the energy storage battery 41. Specifically, it can be implemented using the existing S-4000W-110 AC / DC converter.The inverter 322 converts DC power (battery) into AC power for user use, achieving a stable output of 5-30KW of single-phase and three-phase AC power. Through advanced inverter technology and precise control algorithms, it ensures extremely low harmonic distortion in the output AC power. It not only stably supplies power to various household appliances, meeting daily household electricity needs, but also provides safe and efficient charging services for electric vehicles. It features comprehensive protection functions against overvoltage, undervoltage, overload, and short circuits, ensuring electrical safety. This can be implemented using existing conventional inverters. The energy storage battery 41 stores the DC voltage converted from the photovoltaic panel output and mains power. It can be implemented using existing lithium iron phosphate batteries. The battery controller 42 intelligently manages battery charging and discharging, automatically adjusting the charging and discharging strategy based on battery status and system requirements. It employs intelligent charging algorithms to extend battery life and improve efficiency, while also providing protection against overcharge, over-discharge, and overheating. This can also be implemented using existing conventional battery controllers.

[0022] Compared with existing technologies, the household photovoltaic energy storage inverter and controller integrated unit provided by this utility model has the following advantages: 1) The cabinet interior is divided into multiple empty compartments by horizontal partitions. Each empty compartment includes a device placement compartment and a battery placement compartment located below the device placement compartment. The device placement compartment is further divided into a front placement compartment and a rear placement compartment by vertical partitions. A photovoltaic DC input MPPT controller and a dual power conversion controller are fixedly installed on the vertical partitions in the front placement compartment. An AC-DC converter and an inverter are fixedly installed in the rear placement compartment. Energy storage batteries and a battery controller are fixedly installed in the battery placement compartment. This layout reduces internal wiring interference and facilitates connection and maintenance. 2) It integrates multiple functions such as control, inversion, and energy storage into one unit, reducing the number of devices, shrinking the footprint, and lowering installation complexity and cost. Users can complete the initial installation and connection without professional knowledge. It can also be placed outdoors, with more flexible installation location selection. Therefore, it has a high degree of integration and is easy to install. 3) The photovoltaic DC input MPPT controller significantly improves the power generation efficiency of photovoltaic panels, and the intelligent charging and discharging strategy of the battery controller reduces energy waste. Compared with traditional systems, the overall energy utilization rate can be improved by about 10%-20%, resulting in high efficiency and energy saving. 4) Each functional module has comprehensive protection functions, which can effectively ensure the safety of equipment and users' electricity use, reduce the risk of failure, and improve safety. 5) The internal space of the battery storage compartment can be flexibly configured with battery combinations of different capacities, which can meet the needs of users with different energy storage requirements from low to high, enhancing the versatility and market adaptability of the equipment. The inverter's wide power output range of 5-30KW, as well as single-phase and three-phase output modes, can meet the diverse electricity use needs of households and electric vehicle charging scenarios, providing users with a convenient, reliable, and flexible clean energy usage solution with strong adaptability. 6) The dual power conversion controller can switch to the mains power system in time when the system fails, forming an effective fault response mechanism, ensuring the continuity of power supply for users, improving the reliability of the system and the user experience, and is especially suitable for scenarios with high requirements for power supply stability.

[0023] For a specific embodiment, please refer to Figures 1 to 3 As shown, the cabinet 1 is a metal box-type upright cabinet, which has good heat dissipation and protection performance, with a protection level of IP65, which can effectively resist the influence of external factors such as dust and rain, and meet the needs of outdoor placement. The bottom of the cabinet 1 is equipped with universal casters 6 with brakes, which facilitates the movement of the entire household photovoltaic energy storage inverter control unit, and can then connect the DC or AC side of the battery packs of multiple cabinets to the grid, improve the system's storage capacity, and realize the function of a microgrid.

[0024] For a specific embodiment, please refer to Figure 4 As shown, the left and right walls of the empty compartment (including the device placement compartment 3 and the battery placement compartment 4) are provided with louvers 7, and a temperature-controlled exhaust fan 8 is installed on the inner wall of the louvers 7, which can enhance the airflow inside the cabinet 1 and achieve better heat dissipation.

[0025] For a specific embodiment, please refer to Figure 1 As shown, the device placement compartment 3 has two battery placement compartments 4 arranged vertically below it, which can flexibly configure battery series and parallel combinations from 10 degrees to 100 degrees, and place energy storage batteries 41 and battery controllers 42 to meet the energy storage needs of different users.

[0026] For a specific embodiment, please refer to Figure 2 As shown, a horizontal partition 9 is fixedly installed inside the rear installation compartment 32, which divides the interior of the rear installation compartment 32 into an upper installation compartment and a lower installation compartment. The inverter 322 includes an inverter transformer 3221 and an inverter control circuit board 3222 connected to each other. The inverter transformer 3221 and the inverter control circuit board 3222 are implemented using existing technology. The inverter control circuit board 3222 is fixedly installed in the upper installation compartment, and the inverter transformer 3221 and the AC / DC converter 321 are installed in the lower installation compartment. This layout can better reduce internal circuit interference and facilitate connection and maintenance.

[0027] For a specific embodiment, please refer to Figure 1As shown, the vertical partition 5 inside the front mounting compartment 31 is also fixedly equipped with an AC output controller (multi-function meter) 3103, an AC input controller (multi-function meter) 3104, an inverter DC protector 3105, an inverter AC output protector 3106, a photovoltaic DC charging protector 3107, a mains input protector 3108, a mains charging controller (multi-function meter) 3109, a charging DC voltage controller 3110, and a DC monitor (multi-function meter) 3111. The input and output terminals of the AC output controller 3103 are connected to the inverter output and the electrical load, respectively. The input and output terminals of the AC input controller 3104 are connected to the mains power and the mains input protector, respectively. The input of the inverter DC protector 3105 is... The output terminals are connected to the energy storage battery and the inverter, respectively. The input and output terminals of the inverter AC output protector 3106 are connected to the electrical load and the inverter, respectively. The input and output terminals of the photovoltaic DC charging protector 3107 are connected to the photovoltaic panel and the photovoltaic DC input MPPT controller, respectively. The input and output terminals of the mains input protector 3108 are connected to the mains power, the inverter, and the AC / DC converter, respectively. The input and output terminals of the mains charging controller 3109 are connected to the mains input protector and the AC / DC converter, respectively. The input and output terminals of the charging DC voltage controller 3110 are connected to the AC / DC converter and the energy storage battery, respectively. The input and output terminals of the DC monitor 3111 are connected to the inverter and the energy storage battery (battery pack), respectively.The AC output controller 3103 is used to remotely view the output power and energy of the entire unit, and can be implemented using an existing model GR2PWS networked switch version curve color screen meter; the AC input controller 3104 is used to remotely view the mains input power and energy of the entire unit, and can be implemented using an existing model GR2PWS networked switch version curve color screen meter; the inverter DC protector 3105 is used to protect the DC system, and can be implemented using an existing model DZ47 2PC125A protector; the inverter AC output protector 3106 is used to protect the inverter output circuit, and can be implemented using an existing model DZ47S2P C63 protector; the photovoltaic DC charging protector 3107 is used for the on / off control and protection of photovoltaic power input, and can be implemented using an existing model DZ47S2P C63 protector; the mains input protector 3108 is used to protect the mains input circuit, and can be implemented using an existing model DZ47PLE. The C40 protector is used for protection; the AC / DC power charging controller 3109 is used for remote monitoring of the AC / DC converter's power and on / off state, and can be implemented using the existing GR2PWS network switch version curve color screen meter; the charging DC voltage controller 3110 is used for overcharging and over-discharging protection during the AC / DC converter's charging of the energy storage battery, and can be implemented using the existing ACDC110-240V controller; the DC monitor 3111 is used for monitoring the energy storage battery voltage, input / output current, and power, and can be implemented using the existing DT20 controller.

[0028] As a specific embodiment, the AC input controller 3104, AC output controller 3103, AC mains charging controller 3109, and DC monitor 3111 are also equipped with a communication module. The communication module supports multiple communication methods such as Wi-Fi, Bluetooth, and RS485. Through the controller with a small display screen, electrical parameters such as the system's power generation, power consumption, battery power, and equipment operating status are uploaded to a mobile phone. Users can remotely monitor and control the equipment through their mobile phones, and perform operations such as remote start / stop and parameter adjustment.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A household photovoltaic energy storage and inverter integrated machine, comprising a cabinet, characterized in that, The cabinet is a metal box type vertical cabinet, and the bottom of the cabinet is provided with universal casters with brakes.

2. The household photovoltaic energy storage and inverter integrated machine of claim 1, wherein, The left and right cabin walls of the cabin are provided with louvers, and the inner side of the louver is provided with a temperature control exhaust fan.

3. The household photovoltaic energy storage and inverter integrated machine of claim 1, wherein, The device installation cabin is provided below with two battery placement cabins arranged in an up-down manner.

4. The household photovoltaic energy storage and inverter integrated machine of claim 1, wherein, The rear installation cabin is internally and fixedly provided with a horizontal partition plate, the horizontal partition plate divides the rear installation cabin into an upper installation cabin and a lower installation cabin, the inverter comprises an inverter transformer and an inverter control circuit board connected with each other, the inverter control circuit board is fixedly arranged in the upper installation cabin, and the inverter transformer and the AC-DC converter are arranged in the lower installation cabin.

5. The household photovoltaic energy storage and inverter integrated machine of claim 1, wherein, The vertical partition plate in the front installation cabin is also fixedly provided with an AC output controller, an AC input controller, an inverter DC protector, an inverter AC output protector, a photovoltaic DC charging protector, a mains input protector, a mains charging controller, a charging DC voltage controller and a DC monitor, the input and output ends of the AC output controller are connected with the inverter output and the power load respectively, the input and output ends of the AC input controller are connected with the mains and the mains input protector respectively, the input and output ends of the inverter DC protector are connected with the energy storage battery and the inverter respectively, the input and output ends of the inverter AC output protector are connected with the power load and the inverter respectively, the input and output ends of the photovoltaic DC charging protector are connected with the photovoltaic panel and the photovoltaic DC input MPPT controller respectively, the input and output ends of the mains input protector are connected with the mains and the inverter and the AC-DC converter respectively, the input and output ends of the mains charging controller are connected with the mains input protector and the AC-DC converter respectively, the input and output ends of the charging DC voltage controller are connected with the AC-DC converter and the energy storage battery respectively, and the input and output ends of the DC monitor are connected with the inverter and the energy storage battery respectively.

6. The household photovoltaic energy storage and inverter integrated machine of claim 1, wherein, ​ 7. The household photovoltaic energy storage and inverter integrated machine of claim 6, characterized in that, The AC input controller, the AC output controller, the mains charging controller and the DC monitor are further provided with a communication module.

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