Modular photovoltaic tracking control box and control system suitable for different complex application scenarios

Abstract

The application discloses a modular photovoltaic tracking control box suitable for different complex application scenarios, which comprises a PCBA module, a power module and a battery module. Each module has an independent module shell. The shell of the PCBA module is provided with a first electrical interface and a second electrical interface. The shell of the power module is provided with a third electrical interface which is detachably connected with the first electrical interface. The battery module is provided with a fourth electrical interface which is detachably connected with the second electrical interface. The PCBA module is selected from a plurality of models such as a slaveless slave, a single slave, a double slave and a triple slave. The power module is selected from a plurality of models of different power supply types and power levels. The battery module is selected from a plurality of models such as a battery-free battery, a normal-temperature battery and a low-temperature battery. The modules are freely combined into a complete control box through the electrical interfaces, a small number of standard modules can cover a large number of project customization requirements, the development and production costs are significantly reduced, and on-site maintenance and later expansion are facilitated.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic tracking bracket system technology, specifically a modular photovoltaic tracking control box and control system applicable to different complex application scenarios. Background Technology

[0002] In recent years, the global photovoltaic industry has developed rapidly. Photovoltaic tracking systems have become the mainstream configuration for large and medium-sized photovoltaic projects such as ground-mounted power plants, mountain photovoltaics, and fishery-solar hybrid projects due to their ability to significantly increase the duration of sunlight received by modules and improve power generation. As the core control unit of the tracking system, the photovoltaic tracking control box undertakes key functions such as drive control, angle calculation, environmental monitoring, and communication linkage. Its performance and cost directly affect the operating efficiency and construction investment of the power plant.

[0003] Currently, photovoltaic (PV) tracking control boxes generally adopt an integrated design, meaning that all components, such as the control circuit board, power supply, and backup battery, are integrated into a single box according to the specific needs of a project, forming a fixed model. However, PV projects are highly customized, with significant differences in terrain, bracket size, number of tracking rows, power supply method, and climate conditions, often requiring a custom-designed control box for each project. This results in a wide variety of control box models, requiring manufacturers to maintain dozens or even more models simultaneously, leading to long development cycles, high mold costs, and complex production management, thus increasing equipment procurement and lifecycle management costs. On the other hand, integrated control boxes also reveal significant shortcomings in daily maintenance. When an internal component (such as the power supply or battery) fails, maintenance personnel need to open the entire box, remove internal fasteners and wiring to replace it, a cumbersome and time-consuming process. Some existing solutions attempt to improve convenience in certain areas. For example, Chinese patent CN220733146U discloses a PV tracking controller housing that places the battery separately in a battery compartment, with the compartment opening sealed with a snap-on cover, facilitating battery replacement. However, this solution is still essentially an integrated design, with power supplies and other components still integrated into the main chassis, making it impossible to quickly replace them or solve the problem of numerous models and high costs caused by different project requirements.

[0004] As competition in the photovoltaic industry intensifies, a standardized design scheme has become a critical technical challenge that needs to be addressed in this field. It aims to quickly assemble control boxes that can meet the needs of different projects, thereby reducing development and production costs and facilitating on-site installation and subsequent maintenance. Summary of the Invention

[0005] To address the technical problems of existing photovoltaic tracking control boxes, which employ an integrated design leading to numerous models, high development costs, and difficulties in replacing internal components, this invention provides a modular photovoltaic tracking control box suitable for various complex application scenarios. It deconstructs the control box into three standardized functional units with independent housings: a PCBA module, a power module, and a battery module. Each unit has multiple pre-set optional models, allowing users to select and freely combine models from each module according to actual project needs. This enables the creation of diverse control box solutions covering a wide range of project variations using a limited number of standard modules, significantly reducing the number of models requiring separate design and production, lowering development, production, and management costs, while simultaneously enabling rapid on-site replacement of faulty modules and flexible system expansion.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a modular photovoltaic tracking control box suitable for various complex application scenarios, comprising a PCBA module, a power supply module, and a battery module; the PCBA module has an independent PCBA module housing, which contains printed circuit board assemblies, and the PCBA module housing has a first electrical interface and a second electrical interface; the power supply module has an independent power supply module housing, which contains a power supply, and the power supply module housing has a third electrical interface, which is detachably connected to the first electrical interface; the battery module has an independent battery module housing, and the battery module housing has a fourth electrical interface, which is detachably connected to the second electrical interface; the PCBA module... The PCBA module, power module, and battery module can be detachably combined into a complete control box through their respective electrical interfaces. The PCBA module is selected from a range of pre-determined PCBA module models, including any one of slaveless PCBA modules, single-slave PCBA modules, dual-slave PCBA modules, and triple-slave PCBA modules. The power module is selected from a range of pre-determined power module models, which are multiple models combining different power supply types and power levels. The battery module is selected from a range of pre-determined battery module models, including any one of battery-free modules, ambient temperature battery modules, and low-temperature battery modules.

[0007] Furthermore, the power module model is any one of DC75W, DC150W, DC200W, DC300W, DC350W, AC75W, AC150W, AC200W, AC300W, and AC350W.

[0008] Furthermore, the connection between the first electrical interface and the third electrical interface, as well as between the second electrical interface and the fourth electrical interface, is sealed using a radial sealing method with O-rings.

[0009] Furthermore, the first electrical interface is provided with a first electrical connector, the second electrical interface is provided with a second electrical connector, the third electrical interface is provided with a third electrical connector, and the fourth electrical interface is provided with a fourth electrical connector. The electrical connection between any two electrical connectors is achieved through contacts.

[0010] Furthermore, the PCBA module housing and the power module housing, as well as the PCBA module housing and the battery module housing, are mechanically fixedly connected by screws for detachability.

[0011] Furthermore, the PCBA module housing is detachably connected to the PCBA unit cover and the PCBA unit base, with a first sealing gasket between them; the PCBA module housing is also provided with a slave interface, the number of which corresponds to the selected PCBA module model, and can be any one of 0, 1, 2 or 3.

[0012] Furthermore, the power module housing is detachably connected to the power unit cover and the power unit base, with a second sealing gasket between them; the power module housing is also provided with a power input interface, which is powered by either AC or DC power, corresponding to the selected power module model.

[0013] Furthermore, a high-voltage switch is also provided inside the power module housing to cut off the power input of the power module; the high-voltage switch and the printed circuit board assembly are located inside the power module housing and the PCBA module housing, respectively, to achieve physical isolation between high and low voltage.

[0014] Furthermore, the battery module housing is detachably connected to the battery cell cover and the battery cell base; when the selected battery module model is a battery-free module, the fourth electrical interface is idle or protected by the electrical interface cover.

[0015] On the other hand, a photovoltaic tracking control system includes the modular photovoltaic tracking control box.

[0016] The modular photovoltaic tracking control box and control system of this invention, applicable to various complex application scenarios, offers the following advantages: It breaks through existing integrated design thinking at the architecture, method, structure, and system levels. By dividing the control box into three standardized units with independent housings—a PCBA module, a power module, and a battery module—which can be selected according to model, it achieves the effect of combining a limited number of modules to create a large number of differentiated control box solutions, significantly reducing development, production, and management costs. In terms of maintenance, if any module is damaged, the entire module can be directly replaced on-site, just like replacing a battery. The radial sealing structure ensures the reliability of the seal after replacement, greatly reducing maintenance costs and downtime. Regarding safety, the independent housing physically isolates high-voltage devices from low-voltage control devices, improving operational safety. In terms of scalability, the product series can be quickly expanded by simply adding new module models to adapt to future technological developments and new application scenarios. Attached Figure Description

[0017] Figure 1 This is a perspective view of the modular photovoltaic tracking control box in this invention.

[0018] Figure 2 This is an exploded perspective view of the modular photovoltaic tracking control box in this invention.

[0019] Figure 3 This is a perspective view of the modular photovoltaic tracking control box after the cover of the hidden PCBA unit is installed.

[0020] Figure 4 This is an exploded perspective view of the PCBA module in this invention.

[0021] Figure 5 This is an exploded perspective view of the power module in this invention.

[0022] Figure 6 for Figure 3 Top view.

[0023] Figure 7 for Figure 6 Sectional view along AA.

[0024] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0025] Figure 9 for Figure 6 Sectional view along BB.

[0026] Figure 10 This is a perspective view of the first electrical connector and the second electrical connector in this invention.

[0027] Figure 11 This is a perspective view of the third and fourth electrical connectors in this invention.

[0028] Reference numerals: Modular photovoltaic tracking control box 100, PCBA module 1, PCBA module housing 11, PCBA unit base 111, PCBA unit cover 112, Printed circuit board assembly 12, First electrical interface 13, First electrical connector 131, Second electrical interface 14, Second electrical connector 141, First sealing gasket 15, Slave interface 16, Motor interface 17, Antenna interface 18, Bluetooth module 19, Power module 2, Power module housing 21, Power unit base 211, Power unit cover 212, Power supply 22, Third electrical interface 23, Third electrical connector 231, Second sealing gasket 24, High voltage switch 25, Power input interface 26, Waterproof and breathable valve 27, Battery module 3, Battery module housing 31, Battery unit cover 311, Battery unit base 312, Fourth electrical interface 32, Fourth electrical connector 321, O-ring 4, Emergency stop switch 5. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see the appendix Figure 1-11 As shown, this invention provides a modular photovoltaic tracking control box 100 suitable for various complex application scenarios. The core innovation lies in deconstructing the traditional integrated control box into three functionally and structurally independent basic modules: a PCBA module 1, a power supply module 2, and a battery module 3. Multiple standard models are pre-set for each module, allowing for free combination between modules to cover a large number of customized project needs with a small number of standard modules. Specifically, the PCBA module 1 has an independent PCBA module housing 11, which houses a printed circuit board assembly 12 (PCBA board). The PCBA module housing 11 has a first electrical interface 13 and a second electrical interface 14. The power supply module 2 has an independent power supply module housing 21, which houses a power supply 22 (such as an AC / DC power supply). The power supply module housing 21 (on the power unit cover 212) has a third electrical interface 23, which is detachably connected to the first electrical interface 13. The battery module 3 has an independent battery module housing 31, which houses battery cells and necessary battery management circuitry. The battery module housing 31 has a fourth electrical interface 32, which is detachably connected to the second electrical interface 14. With the above structure, PCBA module 1, power module 2 and battery module 3 can be detachably combined into a complete control box through their respective electrical interfaces.

[0031] The housings of PCBA module 1, power module 2, and battery module 3 are all independent, sealable physical units, allowing for individual assembly, testing, sealing inspection, and inventory management. This is fundamentally different from the semi-open structure in existing technologies where the battery is integrated as a component within the main housing. Before assembly, each module has an electrical interface cover (not shown) installed at its electrical interface. This cover protects the interface contacts from water, dust, and other foreign matter during transportation and storage. When assembling into a complete control box, the corresponding electrical interface cover is removed for connection.

[0032] The second core innovation of this invention lies in the availability and free combination of multiple module models. To adapt to different tracking bracket lengths, number of rows, and functional requirements, this invention pre-sets several standardized module models for projects to select and combine as needed. Specific selection schemes are as follows:

[0033] As attached Figure 4 As shown, PCBA module 1 is selected from a variety of predetermined PCBA module models, including any one of the following: no slave PCBA module, single slave PCBA module, dual slave PCBA module, and triple slave PCBA module. These four models are primarily distinguished by the number of slave interfaces 16 provided on the PCBA module housing 11: a no-slave PCBA module has 0 slave interfaces 16 and is suitable for independent control of a single row of brackets; a single-slave PCBA module has one slave interface 16 and can control one slave control box; a dual-slave PCBA module has two slave interfaces 16 and can control two slave control boxes; and a triple-slave PCBA module has three slave interfaces 16 and can control three slave control boxes. With technological advancements, PCBA module models with four or more slave interfaces 16 can be developed. Furthermore, depending on project requirements, whether or not a physical human-machine interface (such as an LCD display and buttons) is configured can be differentiated, thereby further subdividing PCBA module 1 into eight or more models, all of which fall within the scope of the modular concept described in this invention.

[0034] Power module 2 is one of a variety of pre-determined power module models. These models are multiple models with different power supply types and power levels. Due to the different terrain, bracket size and number of tracking rows in different projects, the power required to drive the bracket varies. The power supply methods include AC mains power supply, DC power supply from photovoltaic strings, and DC power supply from individual small components. Therefore, it is necessary to provide two main categories of power modules: AC input and DC input, covering different output power levels.

[0035] Battery module 3 is selected from a range of pre-defined battery module models, including any of the following: battery-free module, ambient temperature battery module, and low temperature battery module. When there is a risk of insufficient power supply at the project site at night or on rainy days, and the ambient temperature is within the normal range, an ambient temperature battery module can be used. If the project is located in a cold region, a low temperature battery module can be used, as its internal cells and heating circuits ensure low-temperature charging and discharging performance. When the project does not require a backup battery (e.g., using reliable mains power), a battery-free module can be selected. When a battery-free module is selected, the second electrical interface 14 on PCBA module 1 is idle and can be protected by an electrical interface cover to keep the interface clean.

[0036] By setting the above module models, taking the four types of PCBA modules 1, ten types of power modules 2, and three types of battery modules 3 of this invention as examples, theoretically, 4 × 10 × 3 = 120 different control box configurations can be combined. This greatly improves the flexibility of the control box in meeting the needs of different projects, allowing photovoltaic power plants to be precisely configured according to actual operating conditions, geographical environment, and customer preferences. This avoids the drawback of redesigning the entire control box for a single configuration and significantly reduces the total lifecycle costs of development, production, material management, and subsequent maintenance. Moreover, each additional PCBA module 1 model can generate 30 more control box models, demonstrating extremely high system scalability.

[0037] In this invention, the power module 2 can specifically be any one of the following: DC75W, DC150W, DC200W, DC300W, DC350W, AC75W, AC150W, AC200W, AC300W, and AC350W. Here, DC represents a DC input power module, AC represents an AC input power module, and the numbers represent the rated output power of the power module 2. These ten models can cover the vast majority of power requirements in the current photovoltaic tracking bracket market, ranging from tens of watts to hundreds of watts. Based on the power of the tracking motor and the number of motors driven simultaneously, the corresponding power module 2 model can be quickly matched without redesigning the power system for each project, thus achieving standardization and universality of the power supply 22 components.

[0038] As attached Figure 2 , 5As shown in Figures 8 and 9, in this invention, to ensure the sealing reliability of the modular assembly, especially to maintain excellent waterproof and dustproof performance of the electrical interfaces between modules after multiple insertions and removals, a specific sealing and electrical connection method is adopted. Specifically, the joints between the first electrical interface 13 and the third electrical interface 23, and between the second electrical interface 14 and the fourth electrical interface 32, are sealed using a radial sealing method with O-rings 4. Specifically, the O-rings 4 are fitted into the annular groove on the outer wall of the third electrical interface 23 and the fourth electrical interface 32. Unlike traditional end-face sealing, radial sealing utilizes the radial compression of the O-rings 4 between the outer wall of the insertion end and the inner wall of the interface end to achieve sealing. Its sealing effect does not depend on the tightening torque of the screws. Therefore, even under manual insertion and screw tightening operations on-site, a highly reliable seal can be guaranteed, avoiding seal failure caused by improper screw torque control.

[0039] As attached Figure 4-11 As shown, in this invention, the first electrical interface 13 has a first electrical connector 131, the second electrical interface 14 has a second electrical connector 141, the third electrical interface 23 has a third electrical connector 231, and the fourth electrical interface 32 has a fourth electrical connector 321. Electrical connections between any two electrical connectors are achieved through contacts, typically elastic contact pairs in the form of pins and sockets. The electrical connectors usually also have notches (e.g., the first electrical connector 131) for orientation and ventilation during insertion, ensuring smooth insertion; simultaneously, they also allow gas flow between different modules, enabling the PCBA module to achieve pressure relief, balance internal and external pressure differences, and heat dissipation through the waterproof vent valve on the power module. This structure allows each module to achieve independent sealing protection. When replacing the power module 2 or battery module 3, simply unplug the corresponding electrical connector, replace the new module, and plug it in directly. Electrical connection and sealing are completed simultaneously, requiring no additional operation, significantly improving the convenience and reliability of on-site maintenance. Preferably, as shown in the attached diagram... Figure 10 As shown, the first electrical connector 131 has a notch and is a 2-pin electrical connector; the second electrical connector 141 is a 6-pin electrical connector.

[0040] In this invention, in addition to electrical connections via electrical connectors, each module is reinforced by a mechanical structure to withstand outdoor vibrations and wind loads. Specifically, the PCBA module housing 11 and the power module housing 21, as well as the PCBA module housing 11 and the battery module housing 31, are detachably mechanically fixed together using screws. The power unit cover 212 and the battery unit cover 311 have mounting holes, and the corresponding PCBA module housing 11 has threaded holes. Screws are passed through the mounting holes and tightened to securely fix the power module 2 or battery module 3 to the PCBA module 1. The screw connection facilitates disassembly; when a module needs to be replaced, simply loosen the corresponding mechanical screws and pull out the electrical connector to remove the entire module, enabling plug-and-play quick maintenance.

[0041] As attached Figure 4 As shown, in this invention, PCBA module 1 is the core unit for implementing control logic. Its PCBA module housing 11 is detachably connected to a PCBA unit cover 112 and a PCBA unit base 111, with a first sealing gasket 15 (such as a rubber sealing ring or gasket) between them to ensure the housing's seal. The PCBA module housing 11 also integrates multiple functional interfaces and devices. A slave interface 16 is provided on the housing for connecting to a slave control box and performing communication control. The number of slave interfaces 16 corresponds to the selected PCBA module 1 model: 0 for a PCBA module without slaves; 1 for a single-slave PCBA module; 2 for a dual-slave PCBA module; and 3 for a triple-slave PCBA module. The PCBA module housing 11 also has a motor interface 17 for connecting to the drive motor of the tracking bracket and providing it with operating current. Antenna interface 18 is used to connect an antenna, enabling wireless communication with the network control unit (upper-level device). Bluetooth module 19 is built into the housing and is used for on-site debugging and parameter setting via a mobile app. Emergency stop switch 5 is used to quickly shut down the equipment in emergencies, ensuring the safety of personnel and equipment. These components are all pre-integrated into PCBA module 1, with wiring and testing completed before leaving the factory, eliminating the need for on-site assembly and further simplifying the construction process.

[0042] As attached Figure 5As shown, in this invention, the power module housing 21 is detachably connected to the power unit cover 212 and the power unit base 211, with a second sealing gasket 24 between them to ensure the power module housing 21 is sealed. The power module housing 21 also has a power input interface 26, which is used to draw power from the outside. The power supply type of the power input interface 26 is either AC or DC, corresponding to the selected power module 2 model: if a DC series power module 2 is selected, the power input interface 26 is a DC input terminal; if an AC series power module 2 is selected, the power input interface 26 is an AC input terminal.

[0043] A high-voltage switch 25 is also installed inside the power module housing 21 to cut off the power input of the power module 2. The high-voltage switch 25 and the printed circuit board assembly 12 are located inside the power module housing 21 and the PCBA module housing 11, respectively, to achieve physical isolation between high and low voltage. The high-voltage switch 25 is connected in series in the input circuit to cut off the power input of the entire power module 2 during maintenance or emergency. Since the high-voltage switch 25 is located on the independent power module housing 21, while the low-voltage devices that users frequently operate (such as the emergency stop switch 5 on the PCBA module 1 and the Bluetooth module 19) are located in the PCBA module housing 11, the two are physically isolated through their respective independent housings. This high-low voltage isolation design significantly improves the safety of personnel operating the low-voltage parts and avoids the risk of accidentally touching the high voltage. At the same time, even if the power module 2 short-circuits or burns out due to a fault, its independent housing can confine the fault inside the module, reducing the possibility of collateral damage to the PCBA module 1 and the battery module 3, and reducing property damage caused by the fault.

[0044] In addition, a waterproof and breathable valve 27 can be installed on the power module housing 21. The waterproof and breathable valve 27 allows gas exchange between the inside and outside of the module while ensuring the overall sealing of the module. It plays a role in relieving pressure, balancing the internal and external pressure difference and heat dissipation, and effectively prevents internal condensation caused by temperature changes.

[0045] As attached Figure 9 As shown, in this invention, the battery module housing 31 is detachably connected to the battery cell cover 311 and the battery cell base 312, and internally houses the battery cells and necessary battery management circuitry (BMS). The output of the battery module 3 is connected to the second electrical interface 14 of the PCBA module 1 through the fourth electrical interface 32, providing backup power to the PCBA module 1. Since the battery module 3 has a relatively simple function and can be customized by professional battery manufacturers, this invention does not specifically limit its internal layout. When the battery module 3 model selected according to project requirements is a battery-free module 3, the second electrical interface 14 on the PCBA module 1 is idle, and at this time, the fourth electrical interface 32 is idle or protected by the electrical interface cover.

[0046] This invention also provides a photovoltaic tracking control system, including the modular photovoltaic tracking control box 100, a slave control box (if any) electrically connected to the PCBA module 1, a drive motor, a network control unit, etc. This control system can calculate the solar angle based on GPS location and real-time time, drive the motor to adjust the tilt angle of the photovoltaic support, and achieve remote monitoring via a wireless network. Due to the use of a modular control box, the system's installation, commissioning, and subsequent expansion and upgrades become extremely simple. For example, when a project needs to be expanded from single-row to dual-row tracking, only the original slaveless PCBA module needs to be replaced with a single-slave PCBA module, and a corresponding power supply module 2 needs to be added; there is no need to replace the entire control box system.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular photovoltaic tracking control box suitable for various complex application scenarios, characterized in that: The system includes a PCBA module, a power module, and a battery module. The PCBA module has an independent housing containing printed circuit board assemblies. The housing has a first electrical interface and a second electrical interface. The power module has an independent housing containing a power supply. The housing has a third electrical interface that is detachably connected to the first electrical interface. The battery module has an independent housing with a fourth electrical interface that is detachably connected to the second electrical interface. The PCBA module, power module, and battery module can be detachably combined into a complete control box via their respective electrical interfaces. Among them, the PCBA module is selected from a variety of pre-determined PCBA module models, which include any one of the following: no slave PCBA module, single slave PCBA module, dual slave PCBA module, and triple slave PCBA module; the power module is selected from a variety of pre-determined power module models, which are multiple models with different power supply types and different power levels; and the battery module is selected from a variety of pre-determined battery module models, which include any one of the following: no battery module, normal temperature battery module, and low temperature battery module.

2. The modular photovoltaic tracking control box applicable to different complex application scenarios according to claim 1, characterized in that: The power module model is any one of DC75W, DC150W, DC200W, DC300W, DC350W, AC75W, AC150W, AC200W, AC300W, and AC350W.

3. The modular photovoltaic tracking control box applicable to different complex application scenarios according to claim 1 or 2, characterized in that: The connection between the first electrical interface and the third electrical interface, as well as between the second electrical interface and the fourth electrical interface, is sealed using a radial sealing method with O-rings.

4. The modular photovoltaic tracking control box applicable to different complex application scenarios according to claim 3, characterized in that: The first electrical interface has a first electrical connector, the second electrical interface has a second electrical connector, the third electrical interface has a third electrical connector, and the fourth electrical interface has a fourth electrical connector. The electrical connection between any two electrical connectors is achieved through contacts.

5. The modular photovoltaic tracking control box applicable to different complex application scenarios according to claim 1, characterized in that: The PCBA module housing and the power module housing, as well as the PCBA module housing and the battery module housing, are mechanically fixedly connected by screws.

6. The modular photovoltaic tracking control box applicable to different complex application scenarios according to claim 1, characterized in that: The PCBA module housing is detachably connected to the PCBA unit cover and the PCBA unit base, with a first sealing gasket between them; the PCBA module housing is also provided with a slave interface, the number of which corresponds to the selected PCBA module model, and can be any one of 0, 1, 2 or 3.

7. The modular photovoltaic tracking control box applicable to different complex application scenarios according to claim 1, characterized in that: The power module housing is detachably connected to the power unit cover and the power unit base, with a second sealing gasket between them; the power module housing is also provided with a power input interface, which is powered by either AC or DC power, corresponding to the selected power module model.

8. The modular photovoltaic tracking control box applicable to different complex application scenarios according to claim 7, characterized in that: The power module housing is also equipped with a high-voltage switch to cut off the power input to the power module; the high-voltage switch and the printed circuit board assembly are located inside the power module housing and the PCBA module housing, respectively, to achieve physical isolation between high and low voltage.

9. The modular photovoltaic tracking control box applicable to different complex application scenarios according to claim 1, characterized in that: The battery module housing is detachably connected to the battery unit cover and the battery unit base; when the selected battery module model is a battery-free module, the fourth electrical interface is idle or protected by the electrical interface cover.

10. A photovoltaic tracking control system, characterized in that: Includes the modular photovoltaic tracking control box as described in any one of claims 1 to 9.

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