Round-robin switched uninterruptible photovoltaic power generation system and method

Abstract

The application discloses a wheel rotation switching type uninterrupted photovoltaic power generation system and method, which comprises a photovoltaic power generation device, a battery module, a switching module and a control module. The battery module comprises n storage batteries. The switching module is used for controlling the circuit on-off of the photovoltaic power generation device and any storage battery, and the circuit on-off of any storage battery and an electric load. The control module is electrically connected with the battery module and the switching module respectively. The control module collects the electric quantity information of all the storage batteries, and controls the action of the switching circuit according to all the electric quantity information, so that the photovoltaic power generation device performs photovoltaic charging on any A storage batteries in the battery module, and any B storage batteries except the A storage batteries in the battery module supply power to the electric load at the same time. The application can realize the wheel rotation charging and discharging switching among the storage batteries, so that the clean photovoltaic energy can be used to the maximum extent on the basis of ensuring the safe and reliable operation of the electric load, and the purposes of energy saving and carbon emission reduction are achieved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation technology, and more particularly to a rotating uninterrupted photovoltaic power generation system and method. Background Technology

[0002] With the continuous development of modern power technology, photovoltaic energy, as a relatively ideal clean energy source, has received increasing attention and is gradually being applied to various industrial and civilian sectors. For certain specialized industrial sectors, such as data center server rooms and communication base stations, there are stringent requirements for a stable and uninterrupted power supply. Therefore, how to maximize the effective utilization of photovoltaic energy in these areas has gradually become a major challenge for the industry.

[0003] Taking communication base station scenarios as an example, since communication base stations are mostly installed in high-altitude mountainous areas or on building rooftops, where solar energy resources are relatively abundant, it is suitable to add photovoltaic power supply systems to their power supply systems. For base stations that implement industrial and commercial electricity price standards, this can effectively save on electricity costs generated from obtaining energy from the power grid.

[0004] Current photovoltaic power supply solutions for base stations generally employ a traditional photovoltaic / electricity complementary power supply method: when solar energy resources are abundant, the photovoltaic power generation device directly supplies power to the electrical load, and excess electricity charges the battery; when solar energy resources weaken, the system switches to DC power converted from mains power to supply power to the electrical load while simultaneously charging the battery; when both solar energy resources and mains power are abnormal, the battery temporarily supplies power to the electrical load. This solution can reduce the consumption of mains power to some extent, but it also has some drawbacks.

[0005] Continuing with the example of a communication base station, current photovoltaic power supply solutions on the market employ the aforementioned complementary power supply method. While this can reduce the consumption of mains power to some extent, it also presents the following problems:

[0006] (1) Given that photovoltaic power generation devices are highly susceptible to environmental factors affecting their power generation and efficiency, the traditional photovoltaic power supply system adopts a mechanism that directly supplies power to the load when there is sufficient solar energy. This mechanism carries certain risks. For example, when encountering unpredictable and rapidly changing weather conditions (from "sunshine" to "torrential rain"), the power generation efficiency and power quality of the photovoltaic power supply device will also be affected, forcing the system to frequently switch between photovoltaic power supply and mains power, which is not conducive to the safe and reliable operation of the load.

[0007] (2) Traditional photovoltaic power supply system power supply mechanism is prone to the phenomenon of "charging and discharging at the same time" of energy storage battery pack. Since the power load of application scenarios such as communication base stations is basically constant and will not change much, while photovoltaic power supply devices are easily affected by the light conditions and there are periods of power supply reduction. Therefore, when the battery pack is in the state of "discharge > charge" for a long time, it will directly affect the service life of the battery pack and increase the replacement cost of the battery pack.

[0008] (3) Traditional photovoltaic power supply systems are relatively passive and cannot make real-time assessments and judgments on the impact of the external environment on photovoltaic power generation efficiency. This results in the inability to make early warnings and initiate corresponding preventive measures on whether the current power supply mode is reasonable, and the inability to avoid the risk of system power outages to a greater extent, which increases the operation and maintenance costs.

[0009] Therefore, there is an urgent need for a rotating, uninterrupted photovoltaic power generation system and method to solve the above problems. Summary of the Invention

[0010] The purpose of this invention is to provide a rotating uninterrupted photovoltaic power generation system and method, which can perform photovoltaic charging on batteries that need charging based on the actual power information of all batteries, and simultaneously use batteries with actual power to meet the external power supply needs to supply power to the electrical load. This enables rotating charging and discharging switching between the batteries, thereby maximizing the use of clean photovoltaic energy while ensuring the safe and reliable operation of the electrical load, in order to achieve energy saving and carbon emission reduction, and to ensure that all batteries have reasonable charging and discharging actions.

[0011] To achieve the above objectives, this invention discloses a rotating and switching uninterrupted photovoltaic power generation system, comprising a photovoltaic power generation device, a battery module, a switching module, and a control module. The photovoltaic power generation device is electrically connected to the battery module, and the battery module is electrically connected to an electrical load. The battery module includes n batteries. The switching module controls the circuit connection and disconnection between the photovoltaic power generation device and any battery, and between any battery and the electrical load. The control module is electrically connected to both the battery module and the switching module. The control module collects the power information of all batteries and controls the operation of the switching circuit based on the power information, so that the photovoltaic power generation device performs photovoltaic charging on any A batteries in the battery module, and simultaneously enables any B batteries in the battery module other than the A batteries to supply power to the electrical load, wherein A+B≤n.

[0012] Compared with existing technologies, the control module of this invention collects the power information of all batteries and controls the operation of the switching circuit based on the power information. This enables the photovoltaic power generation device to perform photovoltaic charging on any A batteries in the battery module, and simultaneously enables any B batteries other than A batteries in the battery module to supply power to the electrical load. Based on the actual power information of all batteries, it can perform photovoltaic charging on batteries that need charging, and simultaneously use batteries with sufficient power to meet the external power supply needs to supply power to the electrical load. This allows for cyclic charging and discharging switching between batteries, thereby maximizing the use of clean photovoltaic energy while ensuring the safe and reliable operation of the electrical load. This achieves the goals of energy saving and carbon emission reduction, and effectively extends the service life of the batteries through cyclic charging and discharging.

[0013] Ensure that all batteries can perform reasonable charging and discharging operations.

[0014] Preferably, the switching module includes a first switching circuit, the first switching circuit includes multiple first switching branches, the photovoltaic power generation device includes multiple first output ports, and each first output port is electrically connected to a corresponding battery through a first switching branch.

[0015] Specifically, the first switching branch is provided with a first switching switch, and the control module is electrically connected to the first switching switch to control the on / off state of the first switching switch.

[0016] Preferably, the rotating uninterruptible photovoltaic power generation system further includes a backup rectifier module for DC charging any battery. The backup rectifier module is electrically connected to the control module. The switching module further includes a second switching circuit, which includes multiple second switching branches. The backup rectifier module includes a power supply port and multiple second output ports. The backup rectifier module is connected to the power grid or an external power source through the power supply port. Each second output port is electrically connected to a corresponding battery through a second switching branch.

[0017] Specifically, the second switching branch is provided with a second switching switch, and the control module is electrically connected to the second switching switch to control the on / off state of the second switching switch.

[0018] Furthermore, the backup rectifier module is also used to DC charge any A batteries in the battery module when the light energy conversion efficiency of the photovoltaic power generation device is lower than a preset value.

[0019] Preferably, the rotating uninterrupted photovoltaic power generation system further includes a sensor module, which is electrically connected to the control module. The sensor module is used to collect environmental information of the photovoltaic power generation device in real time and feed it back to the control module.

[0020] Preferably, the rotating uninterrupted photovoltaic power generation system further includes a communication module, which is electrically connected to the control module, and the control module communicates with external devices through the communication module.

[0021] Preferably, the rotating uninterrupted photovoltaic power generation system further includes a touch screen, which is electrically connected to the control module and is used for data interaction with the control module.

[0022] Accordingly, the present invention also discloses a rotating switching uninterrupted photovoltaic power generation method, applied to the rotating switching uninterrupted photovoltaic power generation system described above, which includes the following steps:

[0023] S1. Collect the real-time power values ​​of all batteries;

[0024] S2. Compare the real-time power value of each battery with the preset minimum battery storage capacity, and perform photovoltaic charging on any A batteries in the battery module according to the comparison result, and simultaneously enable any B batteries in the battery module other than the A batteries to supply power to the electrical load, wherein the battery module includes n batteries, and A+B≤n.

[0025] Preferably, step S2 specifically includes:

[0026] S21. Compare the real-time power value of each battery with the preset minimum battery storage capacity.

[0027] S22. If the real-time charge value of any A batteries among all batteries is less than or equal to the preset minimum battery storage capacity, and the real-time charge value of any B batteries among all batteries is greater than the preset minimum battery storage capacity, then photovoltaic charging is performed on the A batteries, and power is simultaneously supplied to the electrical load through the B batteries.

[0028] S23. If the real-time power value of all batteries is less than or equal to the preset minimum battery storage capacity, then all batteries are charged by photovoltaic or DC, and the electrical load is supplied with DC power at the same time. Attached Figure Description

[0029] Figure 1 This is a topology diagram of the rotating switching uninterrupted photovoltaic power generation system of the present invention;

[0030] Figure 2 This is a specific circuit diagram of the rotating switching uninterrupted photovoltaic power generation system of the present invention. Detailed Implementation

[0031] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0032] Please see Figure 1 As shown, the rotating uninterruptible photovoltaic (PV) power generation system 100 of this embodiment is suitable for using photovoltaic power as the main source of electricity to charge the battery in rotation. While ensuring the safe and reliable operation of the electrical load 1, it maximizes the use of clean photovoltaic energy to achieve energy conservation and reduce carbon emissions. Furthermore, while ensuring stable power quality, it effectively eliminates the "charging and discharging" phenomenon of the battery, effectively protecting its lifespan, reducing maintenance costs, and allowing the system to switch to mains power to supply the load and / or charge the battery when photovoltaic energy fails to meet normal charging and battery power supply needs. The topology of the rotating uninterruptible photovoltaic (PV) power generation system 100 of this embodiment will be described in detail below.

[0033] Please see Figure 1 As shown, the rotating uninterrupted photovoltaic power generation system 100 of this embodiment includes a photovoltaic power generation device 10, a battery module 20, a switching module, and a control module 40. The photovoltaic power generation device 10 is electrically connected to the battery module 20, and the battery module 20 is electrically connected to the electrical load 1. It can be understood that the photovoltaic power generation device 10 mainly consists of solar photovoltaic panels and related accessories, used to directly collect clean photovoltaic energy such as sunlight and convert it into electrical energy (direct current), which is stored in the battery module 20 through charging. The battery module 20 supplies power to the electrical load 1 through discharging.

[0034] The battery module 20 includes n batteries. A switching module controls the connection and disconnection of the circuit between the photovoltaic power generation device 10 and any of the batteries, and between any of the batteries and the electrical load 1. A control module 40 is electrically connected to both the battery module 20 and the switching module. The control module 40 collects battery information from all batteries and controls the switching circuit based on this information. This allows the photovoltaic power generation device 10 to charge any A batteries in the battery module 20, and simultaneously allows any B batteries in the battery module 20 (excluding the A batteries) to supply power to the electrical load 1, where A + B ≤ n. It can be understood that the battery information here mainly refers to the battery capacity, specifically the real-time battery capacity. The control module 40, based on the real-time battery capacity and preset logic, charges the batteries that need charging and uses the batteries that do not need charging to supply power to the electrical load 1. Of course, as an extension, the battery information in this embodiment may also include the battery status information, such as whether the battery is in a charging state, a discharging state, or a resting state. The control module 40 can more flexibly realize the cyclic charging and discharging of the battery module 20 in a cyclic manner according to the above real-time power value and status.

[0035] Preferably, the switching module includes a first switching circuit 31, which includes multiple first switching branches. The photovoltaic power generation device 10 includes multiple first output ports. The photovoltaic power generation device 10 converts photovoltaic energy into direct current and outputs it externally through the first output ports. Each first output port is electrically connected to a corresponding battery through a first switching branch. Specifically, each first switching branch consists of power devices such as cables, first switching switches, and diodes. The control module 40 is electrically connected to the first switching switch to control its on / off state. The first switching circuit 31 is mainly used to establish the system's power supply and distribution logic, enabling effective and reliable switching of power supply units under specific conditions. Preferably, the first switching switch here is a DC contactor, which is low in cost, highly stable, and suitable for power switching through the control module 40.

[0036] Preferably, the rotating uninterruptible photovoltaic power generation system 100 also includes a backup rectifier module 50 for DC charging any battery, and the backup rectifier module 50 is electrically connected to the control module 40. The main function of the backup rectifier module 50 is to serve as a backup disaster recovery unit when the battery module 20 has insufficient power. It can switch to mains power to supply power to the electrical load 1 in a timely manner to ensure uninterrupted power supply to the system. It can also use mains power to DC charge the battery module 20 when the sunlight conditions are poor and / or the electricity price is at a low level.

[0037] The switching module also includes a second switching circuit 32, which comprises multiple second switching branches. A backup rectifier module 50 includes a power supply port and multiple second output ports. The backup rectifier module 50 converts AC power into DC power and outputs it through the second output ports. The backup rectifier module 50 is connected to the power grid or an external power source through the power supply port. Each second output port is electrically connected to a corresponding battery through a second switching branch. Specifically, each second switching branch is equipped with a second switching switch, and the control module 40 is electrically connected to the second switching switch to control its on / off state. Specifically, each second switching branch consists of cables, a second switching switch, and power devices such as diodes. The control module 40 is electrically connected to the second switching switch to control its on / off state. This second switching circuit 32 is mainly used to establish the system's power supply and distribution logic, enabling effective and reliable switching of power supply units under specific conditions. Preferably, the second switching switch is a DC contactor, which is low in cost, highly stable, and suitable for power switching via the control module 40.

[0038] Furthermore, the backup rectifier module 50 is also used to DC charge any A batteries in the battery module 20 when the light energy conversion efficiency of the photovoltaic power generation device 10 is lower than a preset value. The preset value can be set to a light intensity below a certain standard, which could mean extremely poor light intensity or no light. In this case, the backup rectifier module 50 DC charges the batteries to meet disaster recovery requirements.

[0039] Preferably, the rotating uninterrupted photovoltaic power generation system 100 further includes a sensor module 60, which is electrically connected to the control module 40. The sensor module 60 is used to collect environmental information of the photovoltaic power generation device 10 in real time and feed it back to the control module 40. Specifically, the sensor module 60 consists of various sensors that can monitor factors affecting photovoltaic power generation efficiency, such as light intensity sensors, temperature and humidity sensors, and wind speed sensors. It collects and monitors the climate and light conditions of the installation environment of the photovoltaic power generation device 10 in real time, converts the collected environmental information into electrical signals, and transmits them to the control module 40 so that the control module 40 can perform real-time power switching.

[0040] Preferably, the rotating uninterruptible photovoltaic power generation system 100 further includes a communication module 70, which is electrically connected to the control module 40. The control module 40 communicates with external devices through the communication module 70. The communication module 70 preferably has remote communication and control functions, so that maintenance personnel can remotely monitor the system's operating status in real time and issue corresponding operation commands.

[0041] Preferably, the rotating uninterruptible photovoltaic power generation system 100 further includes a touch screen 80, which is electrically connected to the control module 40 and is used for data interaction with the control module 40. Preferably, the touch screen 80 is a display screen integrating a human-machine interface, which facilitates maintenance personnel in reading various system function parameters and setting related functions.

[0042] Accordingly, the present invention also discloses a rotating-switching uninterrupted photovoltaic power generation method, applied to the rotating-switching uninterrupted photovoltaic power generation system 100 as described above, which includes the following steps:

[0043] S1. Collect the real-time power values ​​of all batteries;

[0044] S2. Compare the real-time power value of each battery with the preset minimum battery storage capacity, and perform photovoltaic charging on any A batteries in the battery module 20 according to the comparison result, and simultaneously enable any B batteries in the battery module 20 other than the A batteries to supply power to the electrical load 1, wherein the battery module 20 includes n batteries, and A+B≤n.

[0045] Preferably, step S2 specifically includes:

[0046] S21. Compare the real-time power value of each battery with the preset minimum battery storage capacity.

[0047] S22. If the real-time charge value of any A batteries among all batteries is less than or equal to the preset minimum battery storage capacity, and the real-time charge value of any B batteries among all batteries is greater than the preset minimum battery storage capacity, then photovoltaic charging is performed on the A batteries, and power is simultaneously supplied to the electrical load 1 through the B batteries.

[0048] S23. If the real-time power value of all batteries is less than or equal to the preset minimum battery storage capacity, then all batteries are charged by photovoltaic or DC, and the electrical load 1 is supplied with DC power at the same time.

[0049] It is understandable that when A+B<n, some batteries in the battery module 20 are idle, which can be reserved as backup batteries or batteries awaiting maintenance.

[0050] Please see Figure 1 and Figure 2 As shown, Figure 2 This shows the result when there are two batteries, based on Figure 1 A specific circuit diagram of a rotating uninterrupted photovoltaic power generation system 100 is shown. One of the two batteries in the battery module 20 is labeled as battery C and the other as battery D. The switching module is composed of the circuits of contactors KM1, KM2, and KM3, which together constitute the switching logic described above.

[0051] 1. Main power supply circuit:

[0052] The main power supply circuit of this system is photovoltaic power supply, which means that while ensuring the safe and reliable operation of the electrical load 1, it makes the maximum use of clean photovoltaic energy to achieve the purpose of energy saving and carbon emission reduction. Its power supply logic is to use photovoltaic power generation device 10 to charge batteries C and D in a "rotational" manner. At the same time, batteries C and D discharge the electrical load 1 in a "rotational" manner to avoid reducing the service life of batteries C and D due to simultaneous charging and discharging.

[0053] Let S0 be the minimum battery storage capacity required to ensure normal operation of electrical load 1 for T hours, and let SC be the real-time storage capacity of battery C and SD be the real-time storage capacity of battery D. The control module 40 receives the real-time power information from batteries C and D through the communication port and performs logical judgments. The specific logical judgments are as follows:

[0054] (1) When SC≥S0 and SC≥SD: the control module 40 controls the coils of contactors KM1, KM2 and KM3 to be de-energized, the battery C is in a discharging state and directly supplies power to the electrical load 1, and the battery pack B is in a charging state and receives power replenishment from the photovoltaic power generation device 10.

[0055] (2) When SD≥S0 and SC<SD: the control module 40 controls the coils of contactors KM1 and KM2 to be energized, the coil of contactor KM3 to be de-energized, the battery D is in a discharging state and directly supplies power to the electrical load 1, and the battery C is in a charging state and receives power replenishment from the photovoltaic power generation device 10.

[0056] (3) In special circumstances (such as when there is a certain waiting time before switching mains power), the control module 40 can control the contactor KM2 coil to be energized, while the contactor KM1 and contactor KM3 coils are not energized. At this time, the storage battery C and the storage battery D are simultaneously in a discharging state. The storage battery C and the storage battery D can simultaneously supply power to the electrical load 1. Its function is equivalent to expanding the battery capacity, which is used to delay the possibility of the electrical load 1 losing power to the greatest extent.

[0057] 2. Backup power supply circuit:

[0058] The backup power supply circuit of this system is supplied by the mains power grid. That is, when the photovoltaic energy is insufficient, the system will switch back to directly obtaining power from the grid.

[0059] When SC < S0 and SD < S0, the control module 40 can control the coils of contactors KM1 and KM3 to be energized, while the coil of contactor KM2 is de-energized. At this time, the contacts actuate, and the power supply circuits of batteries C and D are cut off. At this time, both batteries C and D switch to charging mode, and the rectifier module supplies power to the electrical load 1. The standby rectifier module 50 can simultaneously charge batteries C and D for standby, so as to speed up the charging efficiency of the battery pack.

[0060] 3. Sensor module 60's information collection function and information utilization logic:

[0061] Because photovoltaic power generation is greatly affected by environmental factors, with varying day and night lengths in different seasons and different solar radiation intensities in different weather conditions, this system also includes corresponding external environmental detection devices to monitor and record the climate and environmental changes at the actual installation location in real time. This data is then compared with local climate data (such as sunshine duration) obtained through network connectivity. A specific algorithm is used to output the optimal values ​​for key power supply system parameters, such as the selection of parameter T (where T is the number of hours the battery supplies power to load 1 at a time, as set by the system) and the selection of the maximum energy storage capacity of batteries C and D.

[0062] In addition, real-time monitoring and prediction of the external environment can also serve as an early warning function. For example, if the system determines that photovoltaic energy will be scarce due to weather changes in the near future, the system can output corresponding alarm signals in advance to remind maintenance personnel to promptly confirm the stability of the mains power supply in the future period, or to add backup energy storage equipment in a timely manner, so as to minimize the possibility of power outages for important electrical equipment.

[0063] 4. Communication Module 70 Function Description:

[0064] The system is equipped with a communication module 70, which is a remote communication control device such as a DTU module, to remotely monitor and share the system's operating status and various key parameters, thereby realizing the telemetry and remote adjustment functions of this power supply system.

[0065] 5. Display Module Function Description:

[0066] The system is equipped with display modules such as a touch screen 80, which can monitor and display the system's operating status and key parameters in real time, making it convenient for maintenance personnel to make specific settings for the power supply system on-site.

[0067] 6. Explanation of the functional principles of other components:

[0068] (1) Diodes D1 to D16 are used to limit the direction of DC current and prevent "reverse current" phenomenon;

[0069] (2) Relay KA1 is a backup power supply relay for control module 40. Its protection process is as follows: When batteries C and D are normally rotating power supply, contactor KM3 does not operate, and control module 40 controls the batteries to rotate power supply normally; when batteries C and D cannot rotate power supply normally, contactor KM3 operates, and control module 40 directly draws power from the back end of backup rectifier module 50, thereby realizing that backup rectifier module 50 directly supplies power to electrical load 1.

[0070] Combination Figure 1 and Figure 2The control module 40 of this invention collects the power information of all batteries and controls the operation of the switching circuit based on the power information, so that the photovoltaic power generation device 10 can perform photovoltaic charging on any A batteries in the battery module 20, and simultaneously enable any B batteries in the battery module 20 other than A batteries to supply power to the electrical load 1. It can perform photovoltaic charging on batteries that need charging based on the actual power information of all batteries, and simultaneously use batteries with actual power to meet the external power supply needs to supply power to the electrical load 1, so that the batteries can achieve cyclic charging and discharging switching, thereby maximizing the use of clean photovoltaic energy while ensuring the safe and reliable operation of the electrical load 1, so as to achieve the purpose of energy saving and carbon emission reduction, and effectively extend the service life of the batteries by performing cyclic charging and discharging.

[0071] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A round-robin switched uninterruptible photovoltaic power system, characterized by: The system includes a photovoltaic power generation device, a battery module, a switching module, and a control module. The photovoltaic power generation device is electrically connected to the battery module, and the battery module is electrically connected to an electrical load. The battery module includes n batteries. The switching module controls the connection and disconnection of the circuit between the photovoltaic power generation device and any of the batteries, and between any of the batteries and the electrical load. The control module is electrically connected to both the battery module and the switching module. The control module collects the power information of all batteries, which is the real-time power value of each battery. The switching module includes a first switching circuit. The control module compares the real-time charge value of each battery with a preset minimum battery storage capacity, and controls the operation of the first switching circuit based on the comparison result, so that the photovoltaic power generation device can perform photovoltaic charging on any A batteries in the battery module, and simultaneously enable any B batteries in the battery module other than the A batteries to supply power to the electrical load, wherein A+B≤n; If the real-time charge value of any A batteries among all batteries is less than or equal to the preset minimum battery storage capacity, and the real-time charge value of any B batteries among all batteries is greater than the preset minimum battery storage capacity, then the control module controls the first switching circuit to perform photovoltaic charging on the A batteries and simultaneously supply power to the electrical load through the B batteries.

2. The wheel-cycling, uninterruptible photovoltaic power generation system according to claim 1, wherein: The first switching circuit includes multiple first switching branches, and the photovoltaic power generation device includes multiple first output ports. Each first output port is electrically connected to a corresponding battery through a first switching branch.

3. The wheel-cycling, uninterruptible photovoltaic power generation system according to claim 2, wherein: The first switching branch is equipped with a first switching switch, and the control module is electrically connected to the first switching switch to control the on / off state of the first switching switch.

4. The wheel-cycling, uninterruptible photovoltaic power generation system according to claim 1, wherein: It also includes a backup rectifier module for DC charging any battery. The backup rectifier module is electrically connected to the control module. The switching module further includes a second switching circuit, which includes multiple second switching branches. The backup rectifier module includes a power supply port and multiple second output ports. The backup rectifier module is connected to the power grid or an external power source through the power supply port. Each second output port is electrically connected to the corresponding battery through a second switching branch.

5. The wheel-cycling, uninterruptible photovoltaic power generation system according to claim 4, wherein: The second switching branch is equipped with a second switching switch, and the control module is electrically connected to the second switching switch to control the on / off state of the second switching switch.

6. The wheel-cycling, uninterruptible photovoltaic power generation system according to claim 4, wherein: The backup rectifier module is also used to DC charge any A batteries in the battery module when the light energy conversion efficiency of the photovoltaic power generation device is lower than a preset value.

7. The rotating switching uninterrupted photovoltaic power generation system as described in claim 1, characterized in that: It also includes a sensor module, which is electrically connected to the control module. The sensor module is used to collect environmental information of the photovoltaic power generation device in real time and feed it back to the control module.

8. The rotating switching uninterrupted photovoltaic power generation system as described in claim 1, characterized in that: It also includes a communication module and a touch screen. The communication module is electrically connected to the control module, and the control module communicates with external devices through the communication module. The touch screen is electrically connected to the control module and is used to interact with the control module for data exchange.

9. A rotating switching uninterrupted photovoltaic power generation method, applied to a rotating switching uninterrupted photovoltaic power generation system as described in any one of claims 1-8, characterized in that, Includes the following steps: Collect the real-time power values ​​of all batteries; The real-time power value of each battery is compared with the preset minimum battery storage capacity. Based on the comparison result, any A batteries in the battery module are photovoltaic charged, and at the same time, any B batteries in the battery module other than the A batteries supply power to the electrical load. The battery module includes n batteries, and A+B≤n.

10. The rotating switching uninterrupted photovoltaic power generation method as described in claim 9, characterized in that, The step of comparing the real-time charge value of each battery with a preset minimum battery storage capacity, performing photovoltaic charging on any A batteries in the battery module based on the comparison result, and simultaneously enabling any B batteries in the battery module other than the A batteries to supply power to the electrical load, specifically includes: The real-time charge value of each battery is compared with the preset minimum battery storage capacity. If the real-time charge value of any A batteries among all batteries is less than or equal to the preset minimum battery storage capacity, and the real-time charge value of any B batteries among all batteries is greater than the preset minimum battery storage capacity, then the A batteries are charged by photovoltaic power, and the electrical load is supplied through the B batteries at the same time. If the real-time charge value of all batteries is less than or equal to the preset minimum battery storage capacity, then all batteries are charged by photovoltaic or DC, and the electrical load is supplied with DC power at the same time.

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