Solar photoelectric conversion device and system

Abstract

The embodiment of the present application provides a kind of solar photoelectric conversion device and system, the solar photoelectric conversion device includes: film, light transmission film, lamp pearl and photovoltaic piece;Film and light transmission film are oppositely attached;Light transmission film is provided with at least one recess on the side towards film, and installation cavity is formed between recess and film;Lamp pearl and photovoltaic piece are all arranged in installation cavity;Lamp pearl and photovoltaic piece are electrically connected, and photovoltaic piece is used to power lamp pearl.The photoelectric conversion device provided in the present application sets photovoltaic piece and lamp pearl in the installation cavity formed by film and light transmission film, simplifies the structure of photoelectric device, reduces installation difficulty, reduces investment, while photovoltaic piece converts light energy into electrical energy, and electrical energy is delivered to lamp pearl, and lamp pearl emits light, is used as advertising board, improves economic benefit.

Description

Technical Field

[0001] This invention relates to the field of building-integrated photovoltaics (BIPV) technology, and in particular to a solar photovoltaic conversion device and system. Background Technology

[0002] Solar photovoltaic glass curtain wall components, also known as photovoltaic curtain walls, are attached to glass and embedded between two panes of glass. They convert sunlight into electricity using solar cells and photovoltaic panels. They require no fuel, produce no waste gas, generate no waste heat, no waste residue, and no noise pollution. They can be used to generate electricity, thus reducing electricity bills. They also save on traditional building materials; for example, photovoltaic panels can replace polished natural building materials. Solar curtain walls also greatly reduce the environmental burden by protecting natural resources from damage.

[0003] However, existing solar photovoltaic glass curtain walls contain many components, making installation complex, cumbersome, and slow. Furthermore, most existing solar photovoltaic glass curtain wall components do not contain internal lights, making it impossible to illuminate the building at night. Also, if the curtain wall is used as an advertising billboard, an external LED billboard needs to be installed, increasing investment. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a solar photovoltaic conversion device and system, so as to simplify the structure of the solar photovoltaic conversion device, reduce the installation difficulty, reduce investment, and improve economic benefits.

[0005] In a first aspect, embodiments of the present invention provide a solar photovoltaic conversion device, comprising: a film, a light-transmitting film, LED beads, and a photovoltaic cell; the film and the light-transmitting film are attached to each other; at least one recess is provided on the side of the light-transmitting film facing the film, and an installation cavity is formed between the recess and the film; the LED beads and the photovoltaic cell are both disposed in the installation cavity; the LED beads and the photovoltaic cell are electrically connected, and the photovoltaic cell is used to supply power to the LED beads.

[0006] In a preferred embodiment of the present invention, the solar photovoltaic conversion device further includes: a thin-film battery; the thin-film battery is disposed in the mounting cavity; the thin-film battery is electrically connected to the photovoltaic cell and is used for energy storage; the thin-film battery is also electrically connected to the LED beads and is also used to supply power to the LED beads.

[0007] In a preferred embodiment of the present invention, the solar photovoltaic conversion device further includes: a microcontroller; the microcontroller is disposed in the mounting cavity; the microcontroller is connected to the LED beads and is used to control the working state of the LED beads; the microcontroller is also connected to the photovoltaic cell and is used to detect the status information of the photovoltaic cell; the microcontroller is also connected to the thin-film battery and is used to detect the status information of the thin-film battery.

[0008] In a preferred embodiment of the present invention, the solar photovoltaic conversion device further includes: a microcontroller including: an antenna; the antenna is communicatively connected to an external device, and the antenna is used to send information to the external device for communication and to receive information sent by the external device for communication.

[0009] In a preferred embodiment of the present invention, the solar photovoltaic conversion device further includes: the microcontroller further includes: a main control module; the main control module is used to acquire control information sent by external devices and control the color and brightness of the lamp beads according to the control information; the main control module is also used to acquire the voltage and current of the photovoltaic cell and the voltage of the thin-film battery as status information, and send the status information to the external device through an antenna.

[0010] In a preferred embodiment of the present invention, the solar photovoltaic conversion device further includes: the microcontroller further includes: a power management module; the power management module is connected to the photovoltaic cell, and the power management module converts the electrical energy generated by the photovoltaic cell into electrical energy at a fixed voltage, and supplies the electrical energy at the fixed voltage to the thin-film battery.

[0011] In a preferred embodiment of the present invention, the solar photovoltaic conversion device further includes: the microcontroller further includes: a protection module; the protection module is provided with a diode; the power management module and the thin-film battery are both connected to the protection module, and when the voltage of the electrical energy generated by the photovoltaic cell is lower than the voltage of the thin-film battery, the diode in the protection module is reverse-biased and cut off.

[0012] In a preferred embodiment of the present invention, the solar photovoltaic conversion device further includes: the microcontroller further includes: a USB interface; the USB interface is connected to the power management module, the USB interface is connected to an external power source, and the USB interface is used to charge the thin-film battery through the power management module; the USB interface is also connected to the main control module, and the USB interface is connected to an external control device, which is used to send control commands to the main control module through the USB interface.

[0013] Secondly, embodiments of the present invention provide a solar photovoltaic conversion system, including a plurality of solar photovoltaic conversion devices as described above; the plurality of solar photovoltaic conversion devices are connected in communication.

[0014] In a preferred embodiment of the present invention, the solar photovoltaic conversion system further includes: an external device; the external device is communicatively connected to the solar photovoltaic conversion device; the external device sends control information to the solar photovoltaic conversion device, and the solar photovoltaic conversion device operates according to the control information; the external device is also used to receive the operating information of the solar photovoltaic conversion device.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] This invention provides a solar photovoltaic conversion device and system. The solar photovoltaic conversion device includes: a film, a light-transmitting film, LED beads, and a photovoltaic cell; the film and the light-transmitting film are bonded together; at least one recess is provided on the side of the light-transmitting film facing the film, forming an installation cavity between the recess and the film; the LED beads and the photovoltaic cell are both disposed within the installation cavity; the LED beads and the photovoltaic cell are electrically connected, and the photovoltaic cell supplies power to the LED beads. In the solar photovoltaic conversion device provided by this invention, the photovoltaic cell and LED beads are disposed within the installation cavity formed by the film and the light-transmitting film, simplifying the structure of the solar photovoltaic device, reducing installation difficulty, and decreasing investment. Simultaneously, the photovoltaic cell converts light energy into electrical energy and transmits the electrical energy to the LED beads, which then emit light for use as an advertising sign, thus improving economic efficiency.

[0017] Other features and advantages of this disclosure will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the techniques described above.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a solar photovoltaic conversion device provided in an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of another solar photovoltaic conversion device provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram illustrating the internal connection relationships of a solar photovoltaic conversion device provided in an embodiment of the present invention;

[0023] Figure 4 A flowchart illustrating the operation of a solar photovoltaic conversion device provided in this embodiment of the invention;

[0024] Figure 5 This is a schematic diagram of a solar photovoltaic conversion system provided in an embodiment of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 invention based on the specific circumstances.

[0031] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] Existing photovoltaic glass curtain walls have extremely stringent requirements, and must meet the requirements for four properties: wind pressure deformation performance, air permeability performance, rainwater permeability performance, and in-plane deformation performance. The production cost is high. In contrast, photovoltaic power supply films have relatively lower requirements, only need to be installed on the indoor side, and the technical cost is much lower than that of photovoltaic glass, which can effectively reduce the building construction cost.

[0033] Based on this, embodiments of the present invention provide a solar photovoltaic conversion device and system, which are described below through embodiments.

[0034] Example 1

[0035] This invention provides a solar photovoltaic conversion device, see [link to relevant documentation]. Figure 1 The schematic diagram shown is a solar photovoltaic conversion device provided by an embodiment of the present invention. The solar photovoltaic conversion device includes: an integrated film composed of a film and a light-transmitting film, as well as photovoltaic cells and lamp beads; the film and the light-transmitting film are bonded together to form the integrated film.

[0036] Specifically, there are several ways to form an integrated film. One way is to integrate a film and a light-transmitting film into one piece, that is, to press the film and the light-transmitting film together during the manufacturing process. This makes the integrated film structure stable and not easily damaged. Another way to manufacture an integrated film is to bond the film and the light-transmitting film together and fill the space between the two films with adhesive. This makes the integrated film easy to repair and facilitates the replacement of internal electronic equipment.

[0037] The light-transmitting film has at least one recess on the side facing the film, and an installation cavity is formed between the recess and the film; the LED beads and photovoltaic cells are both disposed in the installation cavity;

[0038] Specifically, when manufacturers of solar photovoltaic conversion devices order transparent films, they can add at least one recessed section according to production needs. The specific location of the recessed section can be adjusted according to different products. The recessed section and the film form a mounting cavity, in which electronic components are placed. The mounting cavity can be a large cavity containing all the electronic components, or it can be multiple separate cavities that closely match the shape of the components, with each electronic component placed in a corresponding cavity. Insulating material can also be filled into the cavity to improve the safety of the device.

[0039] The LED chips and photovoltaic cells are electrically connected; the photovoltaic cells supply power to the LED chips. (See also...) Figure 1As shown, in this embodiment, the solar photovoltaic conversion device includes a photovoltaic cell and a lamp bead. The photovoltaic cell and the lamp bead are electrically connected. The main principle of photovoltaic power generation is the photoelectric effect of semiconductors. The photoelectric effect is the phenomenon that light causes a potential difference between different parts of a non-uniform semiconductor or a semiconductor combined with a metal. It is first a process of converting photons (light waves) into electrons and light energy into electrical energy; secondly, it is a process of forming voltage.

[0040] Furthermore, the photovoltaic cells transmit the generated electrical energy to the LED beads, which then emit light. Multiple LED beads are installed within the solar photovoltaic conversion device, forming different patterns. The LED beads emit light, illuminating the patterns. The aforementioned solar photovoltaic conversion device can be used as an advertising billboard.

[0041] This invention provides a solar photovoltaic conversion device, comprising: a film, a light-transmitting film, LED beads, and a photovoltaic cell; the film and the light-transmitting film are bonded together; the light-transmitting film has at least one recess on the side facing the film, forming an installation cavity between the recess and the film; the LED beads and the photovoltaic cell are both disposed within the installation cavity; the LED beads and the photovoltaic cell are electrically connected, and the photovoltaic cell supplies power to the LED beads. In the solar photovoltaic conversion device provided by this invention, the photovoltaic cell and LED beads are disposed within the installation cavity formed by the film and the light-transmitting film, simplifying the structure of the solar photovoltaic device, reducing installation difficulty, and decreasing investment. Simultaneously, the photovoltaic cell converts light energy into electrical energy and transmits the electrical energy to the LED beads, which then emit light for use as an advertising sign, thus improving economic efficiency.

[0042] Example 2

[0043] Based on the above embodiments, this invention provides another solar photovoltaic conversion device, see [link to previous embodiment]. Figure 2 The schematic diagram shown is of another solar photovoltaic conversion device provided by an embodiment of the present invention. The device includes: an integrated film formed by a film and a light-transmitting film, a thin-film battery, and a microcontroller.

[0044] Specifically, both the film and the transparent film can be made of fluorinated ethylene propylene (FEP) plastic material to ensure the film's light transmittance, wear and corrosion resistance, and insulation for electronic devices. The integrated film is formed by pressing the film and the transparent film together. The film has flat sides, while the transparent film has concave sides and convex sides. The shape and depth of the concave and convex shapes match the shapes and depths of the LED chips, photovoltaic cells, microcontrollers, and thin-film batteries, respectively, to ensure that the LED chips, photovoltaic cells, microcontrollers, and thin-film batteries can be stably embedded in the integrated film.

[0045] Specifically, the thin-film battery is disposed within the mounting cavity; the arrangement of the mounting cavity has been described in detail in Embodiment 1 and will not be repeated here; the thin-film battery is electrically connected to the photovoltaic cell, and the thin-film battery is used for energy storage; the photovoltaic cell transmits the electrical energy converted through the photoelectric effect to the thin-film battery, which serves as an energy storage module to store electrical energy.

[0046] Furthermore, the thin-film battery is also electrically connected to the LED chip, and the thin-film battery is also used to power the LED chip. The module that provides power to the LED chip includes not only the photovoltaic cell but also the thin-film battery. Usually, when there is sufficient sunlight, the photovoltaic cell has a strong photoelectric conversion activity. At this time, the photovoltaic cell can not only power the LED chip, but also transfer the excess electrical energy to the thin-film battery for storage. When there is insufficient sunlight, the thin-film battery powers the LED chip to ensure that the LED chip continues to work.

[0047] Furthermore, embodiments of the present invention provide a connection relationship for a solar photovoltaic conversion device, see [link to related documentation]. Figure 3 The diagram shown is a schematic of the internal connection relationship of a solar photovoltaic conversion device provided by an embodiment of the present invention. The microcontroller includes an antenna, a main control module, a power management module, and a battery protection module, which are connected in sequence. The main control module is also connected to the LED chips, the power management module is also connected to the photovoltaic cell, and the protection module is also connected to the thin-film battery.

[0048] Specifically, the antenna can be an onboard antenna or a ceramic antenna. By connecting to a 2.4G Wi-Fi (Wireless Fidelity, a brand of wireless network communication technology) signal, the solar photovoltaic conversion device sends data to and receives data from the cloud via the antenna. An antenna is added to the microcontroller to enable remote control of the device's LED array.

[0049] Specifically, the antenna is connected to external devices for communication. The antenna is used to send information to and receive information sent by external devices. The microcontroller detects the status information of the solar photovoltaic conversion device and sends it to the external devices through the antenna. The external devices can also send control information to the microcontroller to control the working status of the solar photovoltaic conversion device, such as the on / off state of the thin-film battery or the working status of the lamp beads.

[0050] In this embodiment, the external device can be a mobile phone, computer, tablet computer, or other device with human-computer interaction and communication functions, and the microcontroller of the solar photovoltaic conversion device can communicate with the terminal device.

[0051] Specifically, the main control module is used to acquire control information sent by external devices and control the color and brightness of the LED beads according to the control information; the main control module is also used to acquire the voltage and current of the photovoltaic cell and the voltage of the thin-film battery as status information, and send the status information to the external devices through the antenna.

[0052] Specifically, the main control module can be programmed and controlled using an ESP series WiFi chip, with a reserved waterproof USB interface for debugging and downloading. This main control module is mainly responsible for processing the received signals, controlling the color and brightness of the LED beads, uploading the photovoltaic power and power supply voltage, and reporting the working status in real time. The received signals mainly include LED bead color, brightness and timing, network time, and switch commands. The transmitted data mainly includes photovoltaic voltage and current, and battery voltage. Both the received and transmitted data are processed by the host computer (antenna).

[0053] Furthermore, the USB interface is connected to the power management module and an external power source, and is used to charge the thin-film battery through the power management module; the USB interface is also connected to the main control module and an external control device, which is used to send control commands to the main control module through the USB interface.

[0054] Specifically, the power management module is connected to the photovoltaic cell. The power management module converts the electrical energy generated by the photovoltaic cell into electrical energy at a fixed voltage and supplies the fixed voltage electrical energy to the thin-film battery.

[0055] Specifically, the power management module uses an LDO (low dropout regulator) chip to convert the voltage generated by the photovoltaic into 3.3V to power the battery and main controller. When the battery and photovoltaic voltage are too low, all LEDs are automatically turned off and the main controller enters a low-power mode until the battery is sufficiently charged. When the weather is bad and the battery is in a depleted state for a long time, it can be charged through the reserved waterproof USB port to maintain battery vitality.

[0056] Specifically, the protection module contains diodes; both the power management module and the thin-film battery are connected to the protection module. When the voltage of the electricity generated by the photovoltaic cell is lower than the voltage of the thin-film battery, the diodes in the protection module are reverse-biased and cut off. The protection module also contains a fuse, which can blow to protect the circuit when the current surges.

[0057] Specifically, the protection module is mainly designed to prevent backflow of electricity caused by the photovoltaic voltage being lower than the battery voltage due to low photovoltaic energy in cloudy or rainy weather, and to prevent short circuits caused by external factors.

[0058] Furthermore, for the microcontroller of the solar photovoltaic conversion device, the network connection adopts a 2.4G antenna connection. The received data includes four types: LED color, brightness, timing, and switching commands. The transmitted data includes three types: photovoltaic cell voltage, current, and battery voltage.

[0059] The solar photovoltaic conversion device provided in this invention does not require an external power supply or control switch during use. Installation can be completed simply by attaching the smooth, flat side of the integrated film to the inside of the building glass. Powered by the thin-film battery and controlled by the microcontroller, the LEDs can be lit up and combined to form different patterns or text based on the different on / off states of the LEDs. This not only achieves the effect of illuminating the building but also functions as an advertising billboard, thus possessing high commercial advertising value.

[0060] Example 3

[0061] Based on the above embodiments, this invention provides a working process for a solar photovoltaic conversion device, see below. Figure 4 The flowchart of a solar photovoltaic conversion device provided in the embodiment of the present invention shows that when the solar photovoltaic conversion device is started, it first connects to the network and detects the network connection status. After the network is connected, it requests data from the cloud or external devices. After receiving the data, it controls the working status of the lamp beads based on the received data, that is, adjusts the color and brightness of the lamp beads. Furthermore, it is also necessary to detect the status information of the device, such as photovoltaic cell voltage, current and battery voltage, and send the detected status information to the cloud or external devices.

[0062] By using a microcontroller to intelligently control the light emission mode and pattern of the LED array, the control method is simplified and the user experience is improved. It can not only achieve the effect of illuminating buildings, but also realize the function of billboards, and has high commercial advertising value.

[0063] Example 4

[0064] This invention provides a solar photovoltaic conversion system, see [link to relevant documentation]. Figure 5 The schematic diagram shown in this embodiment of the invention provides a solar photovoltaic conversion system. The solar photovoltaic conversion system includes multiple solar photovoltaic conversion devices as described above; the multiple solar photovoltaic conversion devices are connected in communication; furthermore, the solar photovoltaic conversion system also includes: an external device; the external device is connected in communication with the solar photovoltaic conversion device; the external device sends control information to the solar photovoltaic conversion device, and the solar photovoltaic conversion device operates according to the control information; the external device is also used to receive the operating information of the solar photovoltaic conversion device.

[0065] Multiple solar photovoltaic conversion devices are attached to the inside of the building's glass. Powered by thin-film batteries and controlled by a microcontroller, the LEDs can be lit up and combined to form different patterns or text based on their on / off states. This not only illuminates the building but also functions as an advertising billboard, making it highly valuable for commercial advertising.

[0066] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the system described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A solar photovoltaic conversion device, characterized in that, include: Film, translucent film, LED beads and photovoltaic cells; The adhesive film and the light-transmitting film are attached to each other; both the adhesive film and the light-transmitting film are made of fluorinated ethylene propylene copolymer plastic material, the adhesive film has flat sides, and the light-transmitting film has concave sides and convex sides. The light-transmitting film has at least one recess on the side facing the adhesive film, and an installation cavity is formed between the recess and the adhesive film; the shape and depth of the recess are respectively matched with the shape and depth of the component housed in the installation cavity, and the installation cavity is filled with insulating material; Both the LED beads and the photovoltaic cells are disposed within the mounting cavity; The LED bead and the photovoltaic cell are electrically connected, and the photovoltaic cell is used to supply power to the LED bead; The device further includes: a thin-film battery and a microcontroller; both the thin-film battery and the microcontroller are disposed within the mounting cavity; both the thin-film battery and the microcontroller are electrically connected to the photovoltaic cell, the thin-film battery is used for energy storage; the microcontroller is used for controlling the operating state of the LED chips; The thin-film battery is also electrically connected to the LED chip, and the thin-film battery is also used to power the LED chip; The microcontroller is also connected to the photovoltaic cell, and the microcontroller is also used to detect the status information of the photovoltaic cell; The microcontroller is also connected to the thin-film battery, and the microcontroller is also used to detect the status information of the thin-film battery; The microcontroller includes an antenna, a main control module, a power management module, and a protection module connected in sequence; the main control module is connected to the LED beads; the power management module is connected to the photovoltaic cell; and the protection module is connected to the thin-film battery, and the protection module is used to prevent backflow of current. The power management module converts the electrical energy generated by the photovoltaic cell into electrical energy at a fixed voltage, which is then supplied to the thin-film battery and the main control module. When the battery and photovoltaic voltage are too low, the main control module automatically shuts off all LEDs and enters a low-power mode.

2. The solar energy photoelectric conversion device according to claim 1, wherein The antenna is connected to an external device for communication. The antenna is used to send information to the external device and receive information sent by the external device.

3. The solar energy photoelectric conversion device according to claim 2, wherein The main control module is used to acquire control information sent by the external device and control the color and brightness of the LED beads according to the control information; The main control module is also used to acquire the voltage and current of the photovoltaic cell and the voltage of the thin-film battery as status information, and to send the status information to the external device through the antenna.

4. The solar energy photoelectric conversion device according to claim 1, wherein The protection module is equipped with a diode; Both the power management module and the thin-film battery are connected to the protection module. When the voltage of the electrical energy generated by the photovoltaic cell is lower than the voltage of the thin-film battery, the diode in the protection module is reverse-biased and cut off.

5. The solar photovoltaic conversion device according to claim 4, characterized in that, The microcontroller also includes: a USB interface; The USB interface is connected to the power management module and to an external power source. The USB interface is used to charge the thin-film battery through the power management module. The USB interface is also connected to the main control module and to an external control device, which sends control commands to the main control module through the USB interface.

6. A solar photovoltaic conversion system, characterized in that, Includes the solar photovoltaic conversion device as described in any one of claims 1-5; The multiple solar photovoltaic conversion devices are connected in communication.

7. The solar photovoltaic conversion system according to claim 6, characterized in that, The solar photovoltaic conversion system also includes: external equipment; The external device is communicatively connected to the solar photovoltaic conversion device. The external device sends control information to the solar photovoltaic conversion device, and the solar photovoltaic conversion device operates according to the control information. The external device is also used to receive the operating information of the solar photovoltaic conversion device.

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