Photovoltaic power supply circuit, control method thereof, and electronic equipment

Abstract

The present application proposes a photovoltaic power supply circuit, a control method thereof, and an electronic device. The photovoltaic power supply circuit includes an MPPT main power circuit and a switching circuit, which are used to power electronic devices. The present application compares the input voltage received by the MPPT main power circuit from the photovoltaic module with a preset voltage threshold, and then determines whether the current environment is weak light based on the comparison result. If it is in a weak light environment, the switching circuit is controlled to disconnect and return to the step of obtaining the input voltage after the disconnection time reaches the disconnection time. In a weak light environment, the switching circuit can be controlled to disconnect for a continuous disconnection time and then the size of the input voltage and the preset voltage threshold can be re-judged, which can avoid the situation where the switching circuit is repeatedly turned on and off during the weak light power supply process, thereby avoiding damage to the switching circuit to a certain extent, and effectively powering the electronic device.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic power supply technology, and in particular to a photovoltaic power supply circuit, a control method thereof, and an electronic device. Background Art

[0002] When in use, electronic devices (eg, energy storage devices or power converters) can be connected to photovoltaic modules, and the photovoltaic modules are used to power the electronic devices.

[0003] However, when the light intensity is weak, the output power of the photovoltaic modules input into the electronic devices under weak light conditions is low and unstable, which will cause the switching circuit of the electronic devices to switch back and forth between on and off repeatedly, easily causing damage to the switching circuit and making it impossible to effectively power the electronic devices. Summary of the Invention

[0004] The main purpose of the embodiments of the present application is to propose a photovoltaic power supply circuit, a control method thereof, and an electronic device, aiming to avoid the problem of repeated on and off of the switching circuit during weak light power supply, resulting in damage to the switching circuit and inability to effectively power the electronic device.

[0005] According to one aspect of an embodiment of the present application, a control method for a photovoltaic power supply circuit is provided. The photovoltaic power supply circuit is used to power an electronic device. The photovoltaic power supply circuit includes an MPPT main power circuit and a switching circuit. The MPPT main power circuit is used to connect a photovoltaic module. The switching circuit is connected between the MPPT main power circuit and the electronic device. The method includes:

[0006] Obtaining an input voltage received by an MPPT main power circuit from the photovoltaic component;

[0007] When the input voltage is greater than or equal to a preset voltage threshold and is maintained for a first time period, controlling the switch circuit to be turned on so that the MPPT main power circuit supplies power to the electronic device;

[0008] When the input voltage is less than the preset voltage threshold, the switch circuit is controlled to disconnect, and the disconnection duration is determined according to the number of disconnections of the switch circuit. After the disconnection time of the switch circuit reaches the disconnection duration, the step of obtaining the input voltage received by the MPPT main power circuit from the photovoltaic component is returned.

[0009] The method of the present application obtains the input voltage received by the MPPT main power circuit from the photovoltaic component, and then compares the input voltage with the preset voltage threshold. When the input voltage is greater than or equal to the preset voltage threshold, it means that the current input power is high, and the switch circuit can be turned on to use the input voltage to power the electronic device. When the input voltage is less than the preset voltage threshold, it means that the current input power is low, and it can be determined that the current environment is weak. At this time, the switch circuit is disconnected, and after the disconnection time of the switch circuit reaches the disconnection duration, the step of obtaining the input voltage is returned. Among them, the disconnection duration of the present application is determined according to the number of disconnections of the switch circuit. Therefore, when the current environment is in a weak light environment, the present application can determine the disconnection duration of the switch circuit according to the number of disconnections of the switch circuit, which can make the disconnection duration more reasonable and avoid the occurrence of a disconnection duration that is too long or too short. At the same time, in a weak light environment, the control switch circuit needs to remain in the disconnected state for a certain period of time before it can be turned on again. This can avoid the switch circuit from being repeatedly turned on and off during the weak light power supply process, thereby avoiding damage to the switch circuit due to repeated turning on and off, and effectively protecting the switch circuit; since the switch circuit will not be repeatedly turned on and off, the electronic equipment can also maintain a stable and effective power supply.

[0010] In one embodiment of the present application, after controlling the switch circuit to be disconnected and before determining the disconnection duration according to the number of disconnections of the switch circuit, the method further includes:

[0011] The number of disconnections of the switch circuit is updated.

[0012] In one embodiment of the present application, the method for determining the disconnection duration according to the number of disconnections of the switch circuit includes:

[0013] The disconnection duration is equal to the product of the square of the disconnection times and the unit duration.

[0014] In one embodiment of the present application, the method for determining the disconnection duration according to the number of disconnections of the switch circuit includes:

[0015] If the number of disconnections of the switch circuit exceeds a preset number threshold, the disconnection duration is fixed to a preset duration.

[0016] In one embodiment of the present application, the photovoltaic power supply circuit further includes a temperature sensor, and the method for determining the disconnection duration according to the number of disconnections of the switch circuit includes:

[0017] Acquire current temperature data through the temperature sensor;

[0018] The disconnection duration is determined according to the temperature data and the number of disconnections of the switch circuit.

[0019] In one embodiment of the present application, after controlling the switch circuit to be turned on, the method further includes:

[0020] Obtaining a duration during which the switch circuit remains in an on state;

[0021] When the duration exceeds a second duration, the number of disconnections of the switch circuit is reset to zero, and the second duration is greater than the first duration.

[0022] In one embodiment of the present application, the method further includes:

[0023] Acquiring environmental parameters, wherein the environmental parameters include environmental information of the power distribution equipment;

[0024] When the environmental parameters meet the preset conditions, the number of disconnections of the switch circuit is reset to zero.

[0025] In one embodiment of the present application, the photovoltaic power supply circuit further includes a power consumption circuit;

[0026] The power consumption circuit is connected between the photovoltaic module and the MPPT main power circuit;

[0027] The power consumption circuit is used to consume the output power of the photovoltaic assembly when no disconnection signal is received;

[0028] The method further comprises:

[0029] If the number of disconnections of the switch circuit exceeds a preset threshold, the disconnection signal is sent to the power consumption circuit, and then the process returns to the step of obtaining the input voltage received by the MPPT main power circuit from the photovoltaic assembly.

[0030] According to one aspect of an embodiment of the present application, a photovoltaic power supply circuit is provided for powering an electronic device, comprising an MPPT main power circuit, a switch circuit, and a main control circuit, wherein the MPPT main power circuit and the switch circuit are both connected to the main control circuit;

[0031] The MPPT main power circuit is used to connect to the photovoltaic module, and the switch circuit is connected between the MPPT main power circuit and the electronic device;

[0032] The main control circuit is used to execute the method described in any embodiment of the present application.

[0033] According to one aspect of an embodiment of the present application, an electronic device is provided, comprising the photovoltaic power supply circuit described in the embodiment of the present application.

[0034] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic block diagram of a photovoltaic power supply circuit provided in an embodiment of the present application;

[0036] Figure 2 This is a flow chart of a method for controlling a photovoltaic power supply circuit provided by an embodiment of the present application;

[0037] Figure 3 This is an example diagram of the control flow of the photovoltaic power supply circuit provided in an embodiment of the present application;

[0038] Figure 4 This is another example diagram of the control process of the photovoltaic power supply circuit provided in an embodiment of the present application;

[0039] Figure 5 This is another example diagram of the control process of the photovoltaic power supply circuit provided in an embodiment of the present application;

[0040] Figure 6 This is another example diagram of the control process of the photovoltaic power supply circuit provided in an embodiment of the present application;

[0041] Figure 7 This is a flowchart of the steps of a method for determining the disconnection duration according to the number of disconnections of a switch circuit provided in an embodiment of the present application;

[0042] Figure 8 This is another example diagram of the control process of the photovoltaic power supply circuit provided in an embodiment of the present application;

[0043] Figure 9 This is a flowchart of steps performed after the control switch circuit is turned on, provided in an embodiment of the present application;

[0044] Figure 10 This is another example diagram of the control process of the photovoltaic power supply circuit provided in an embodiment of the present application;

[0045] Figure 11 This is a flowchart of the steps for resetting the number of disconnections of a control switch circuit provided by an embodiment of the present application;

[0046] Figure 12 This is an example flow chart of a control method for resetting the number of disconnections of a switch circuit according to an embodiment of the present application;

[0047] Figure 13 is another schematic block diagram of a photovoltaic power supply circuit provided in an embodiment of the present application;

[0048] Figure 14 It is a schematic block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0050] It should be noted that although the device schematics illustrate functional module divisions and the flowcharts illustrate logical sequences, in certain circumstances, the steps shown or described may be performed in a sequence that differs from the module divisions in the device or the sequence in the flowcharts. The terms "first," "second," and so on, in the specification, claims, and drawings, are used to distinguish similar items and are not necessarily used to describe a specific sequence or precedence.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0052] When in use, electronic devices (e.g., energy storage devices or power converters) can be connected to photovoltaic modules, which can be used to power the electronic devices. The photovoltaic power supply circuit provided in this application is used to power electronic devices, wherein the photovoltaic power supply circuit can be set in the electronic device or can be separated from the electronic device as an independent circuit.

[0053] When the power of the electrical energy input from the photovoltaic module to the electronic device exceeds a preset threshold, the photovoltaic power supply circuit controls the switch circuit to conduct, thereby transmitting the electrical energy from the photovoltaic module to the electronic device through the photovoltaic power supply circuit to power the electronic device. If the power of the electrical energy input from the photovoltaic module to the electronic device is less than the preset threshold, the photovoltaic power supply circuit controls the switch circuit to disconnect, thereby interrupting the power supply.

[0054] In low-light conditions, the power input from photovoltaic modules to electronic devices is low and unstable, causing it to sometimes exceed and sometimes fall below a preset threshold. This fluctuation can cause the switching circuit to repeatedly turn on and off, potentially damaging the circuit and preventing it from effectively powering the electronic device.

[0055] In order to solve the above problems, an embodiment of the present application provides a photovoltaic power supply circuit, which can avoid the situation where the switching circuit is repeatedly turned on and off during weak light power supply, thereby avoiding damage to the switching circuit and effectively powering electronic devices.

[0056] Reference Figure 1 , Figure 1This is a schematic block diagram of a photovoltaic power supply circuit provided by an embodiment of the present application. Figure 1 As shown, the photovoltaic power supply circuit 100 includes an MPPT (Maximum Power Point Tracking) main power circuit 110, a switching circuit 120, and a main control circuit 130. The MPPT main power circuit 110 and the switching circuit 120 are both connected to the main control circuit 130. The main control circuit 130 is used to control the MPPT main power circuit 110 and the switching circuit 120. The MPPT main power circuit 110 is connected to the photovoltaic module 10, and the switching circuit 120 is connected between the MPPT main power circuit 110 and the electronic device 20. The photovoltaic module 10 is used to convert solar energy into electrical energy and output it. The MPPT main power circuit 110 is used to connect to the photovoltaic module 10 and perform maximum power point tracking, so that the photovoltaic module 10 can power the electronic device at its maximum power output. When turned on, the switching circuit 120 is used to electrically connect the MPPT main power circuit 110 to the electronic device 20, transmitting the electrical energy input from the photovoltaic module 10 to the electronic device 20 to power the electronic device 20.

[0057] In one embodiment of the present application, referring to Figure 2 , Figure 2 This is a flow chart of a control method for a photovoltaic power supply circuit provided by an embodiment of the present application. Figure 1 The photovoltaic power supply circuit 100 in the embodiment can be implemented by Figure 1 The method is executed by the main control circuit 130 in the embodiment, and includes but is not limited to steps S210 to S230.

[0058] Step S210: obtaining the input voltage received by the MPPT main power circuit from the photovoltaic module.

[0059] In the embodiment of the present application, since the MPPT main power circuit 110 is connected to the photovoltaic module 10 and the main control circuit 130, the main control circuit 130 can obtain the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 10. When the light intensity is strong, the output power of the photovoltaic module is large, and thus the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 10 will be relatively large. When the light intensity is weak, the output power of the photovoltaic module 10 is small, and thus the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 10 will be relatively small. Therefore, the current light intensity can be judged based on the magnitude of the input voltage. When the input voltage is small, it can be determined that the current environment is weak light. When the input voltage is large, it can be determined that the current environment is strong light.

[0060] Step S220: When the input voltage is greater than or equal to the preset voltage threshold and maintains the first time period, the switch circuit is controlled to be turned on so that the MPPT main power circuit supplies power to the electronic device.

[0061] In the embodiment of the present application, after the main control circuit 130 obtains the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 10, it compares the obtained input voltage with a preset voltage threshold. When the input voltage is greater than or equal to the preset voltage threshold and remains at a first time, it indicates that the current light intensity is strong. In this case, the main control circuit 130 controls the switch circuit 120 to conduct, so that the MPPT main power circuit 110 can power the electronic device 20.

[0062] In the embodiment of the present application, by setting the first duration, it is possible to avoid the situation where the input voltage is instantaneously greater than or equal to the preset voltage threshold, thereby avoiding the situation where the main control circuit 130 controls the switch circuit 120 to turn on when the input voltage is instantaneously greater than or equal to the preset voltage threshold, and the main control circuit 130 controls the switch circuit 120 to turn off when the input voltage is detected to be less than the preset voltage threshold at the next moment, causing the switch circuit 120 to be repeatedly turned on and off. It is understandable that in order to avoid the situation where the input voltage is instantaneously greater than or equal to the preset voltage threshold, the first duration is generally set to be relatively short, for example, it can be set to 1-3 seconds. The first duration can be set and modified accordingly according to the specific situation and actual needs, and the embodiment of the present application does not specifically limit the first duration.

[0063] Similarly, in order to judge the current light intensity, or in other words, to determine whether the current environment is in a low-light condition, a preset voltage threshold needs to be set. Specifically, the main control circuit 130 determines whether the current environment is in a low-light environment by comparing the input voltage received by the MPPT main power circuit 110 from the photovoltaic component 10 with the preset voltage threshold. When the input voltage received by the MPPT main power circuit 110 from the photovoltaic component 10 is greater than or equal to the preset voltage threshold, it is determined that the current light intensity is strong, and the electronic device 20 can be effectively powered at this time. When the input voltage received by the MPPT main power circuit 110 from the photovoltaic component 10 is less than the preset voltage threshold, it is determined that the current light intensity is weak. At this time, the main control circuit 130 needs to control the disconnection time of the switch circuit 120 to effectively power the electronic device 20.

[0064] It should be noted that the preset voltage threshold can be set and modified accordingly according to specific circumstances and actual needs. For example, the preset voltage threshold can be set to 15V. The embodiment of the present application does not specifically limit the preset voltage threshold.

[0065] Step S230, when the input voltage is less than the preset voltage threshold, the switch circuit is controlled to disconnect, and the disconnection duration is determined according to the number of disconnections of the switch circuit. After the disconnection time of the switch circuit reaches the disconnection duration, the step of obtaining the input voltage received by the MPPT main power circuit from the photovoltaic module is returned.

[0066] In the embodiment of the present application, when the input voltage is less than the preset voltage threshold, it indicates that the current environment is low light. At this time, the main control circuit 130 controls the switch circuit 120 to disconnect, and returns to step S201 after the disconnection time of the switch circuit 120 reaches the disconnection duration. Therefore, the switch circuit 120 remains in the disconnection state for the disconnection duration and does not detect the input voltage during the disconnection duration. This can prevent the switch circuit 120 from being repeatedly turned on and off within a short period of time.

[0067] The number of times the switch circuit 120 is disconnected can indirectly reflect the current lighting environment. For example, a high number of disconnections indicates an unfavorable lighting environment. This could be due to unstable power supply caused by low light intensity, or persistently low light intensity, such as when the weather is cloudy or dark. On the other hand, a low number of disconnections indicates a favorable lighting environment with high light intensity. Therefore, determining the disconnection duration based on the number of disconnections of the switch circuit actually determines the disconnection duration based on the current lighting environment. Generally, if the lighting environment is ideal and can continuously power the electronic device, i.e., the number of disconnections is low, the disconnection duration is short. On the other hand, if the lighting environment is unfavorable and low light intensity is high, i.e., the number of disconnections is high, the disconnection duration is long. This configuration allows for efficient power supply to the electronic device when light intensity is high. However, when light intensity is low, determining the disconnection duration based on the number of disconnections can optimize the disconnection duration and avoid situations where the disconnection duration is too long or too short. For example, a high number of disconnections indicates a persistently low light environment. At this time, if the switch circuit 120 maintains a fixed disconnection time after being disconnected multiple times, the switch circuit 120 will still be repeatedly turned on and off, causing damage to the switch circuit 120.

[0068] It is understandable that the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 10 is only re-acquired after the disconnection time of the switch circuit 120 reaches the disconnection time. During the time when the switch circuit 120 remains in the disconnected state, the main control circuit 130 does not detect the input voltage. In other words, although the main control circuit 130 can obtain the input voltage in real time, during the disconnection process of the switch circuit 120, the main control circuit 130 will not compare the obtained input voltage with the preset voltage threshold. Only after the disconnection time of the switch circuit 120 reaches the disconnection time will the main control circuit 130 compare the obtained input voltage with the preset voltage threshold. If the input voltage is greater than or equal to the preset voltage threshold, step S220 is executed. If the input voltage is still less than the preset voltage threshold, step S230 is continued.

[0069] In the embodiment of the present application, the main control circuit 130 can determine the current lighting environment based on the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 10. Therefore, when it is determined that the current lighting is strong, the switch circuit 120 is controlled to be turned on to power the electronic device 20. When it is determined that the current lighting is weak, the switch circuit 120 is controlled to be turned off, and the process returns to the step of obtaining the input voltage after the switch circuit 120 has been off for a certain period of time. The off period of time is determined based on the number of times the switch circuit 120 has been off. Therefore, when the current lighting is weak, the off period of time is determined based on the number of times the switch circuit 120 has been off. This can make the off period of time more reasonable and avoid situations where the off period of time is too long or too short. Furthermore, by controlling the switch circuit 120 to be turned on again only after the off period of time has reached the off period of time, the main control circuit 130 can avoid situations where the switch circuit 120 is repeatedly turned on and off during low-light power supply. This effectively protects the switch circuit 120 and ensures a stable and efficient power supply for the electronic device.

[0070] For example, referring to Figure 3 , Figure 3 This is an example diagram of the control flow of the photovoltaic power supply circuit provided in the embodiment of the present application, which is also composed of Figure 1 The main control circuit 130 in the photovoltaic power supply circuit 100 shown in FIG. Figure 3 , including the following steps:

[0071] S310, obtaining an input voltage P received by the MPPT main power circuit from the photovoltaic module;

[0072] S320, determine whether the input voltage P is greater than or equal to the preset voltage threshold P t ;

[0073] S330, if yes, control the switch circuit to be turned on;

[0074] S340, if no, the control switch circuit is disconnected;

[0075] S350, determining the disconnection time T according to the number of disconnections of the switch circuit;

[0076] S360, accumulating the disconnection time t of the switch circuit;

[0077] S370, determining whether the disconnection time t of the switch circuit is greater than or equal to the disconnection duration T, if yes, returning to step S310, if not, returning to step S360.

[0078] In the embodiment of the present application, the preset voltage threshold is set to P t The disconnection time T can be calculated by the disconnection times of the switch circuit 120. The main control circuit 130 first obtains the input voltage P received by the MPPT main power circuit 110 from the photovoltaic module 10, and then determines whether the input voltage P is greater than or equal to the preset voltage threshold P t If the input voltage P is greater than or equal to the preset voltage threshold P t , the switch circuit 120 is controlled to be turned on. If the input voltage P is less than the preset voltage threshold P t , the switch circuit 120 is controlled to be disconnected, and the disconnection duration T is determined according to the number of disconnections of the switch circuit 120. The disconnection time t of the switch circuit 120 is then accumulated. When the accumulated disconnection time t is greater than or equal to the disconnection duration T, the process returns to the step of obtaining the input voltage P.

[0079] In the embodiment of the present application, the main control circuit 130 compares the input voltage P received by the MPPT main power circuit 110 from the photovoltaic module 10 with the preset voltage threshold P. t By making a comparison, the current lighting environment can be determined. Thus, when the lighting is strong, the switch circuit 120 can be controlled to conduct, so that the input voltage P can be used to power the electronic device 20. When the lighting is weak, the switch circuit 120 is controlled to be disconnected, and the process of obtaining the input voltage P is not returned until the disconnection time t reaches the disconnection time T. Determining the disconnection time by the number of disconnections can avoid situations where the switch circuit 120 is controlled to be disconnected even in a strong lighting environment due to a long disconnection time and a failure to compare the input voltage P with the preset voltage threshold in a timely manner. It can also avoid situations where the switch circuit is repeatedly turned on and off in a persistently weak lighting environment due to a short disconnection time.

[0080] In one embodiment of the present application, referring to Figure 4 , Figure 4 This is another example diagram of the control process of the photovoltaic power supply circuit provided in the embodiment of the present application, which is also composed of Figure 1 The main control circuit 130 of the photovoltaic power supply circuit 100 shown in FIG. Figure 4 , including the following steps:

[0081] S410, obtaining an input voltage P received by the MPPT main power circuit from the photovoltaic module;

[0082] S420, let i=0, where i is the number of times the switch circuit is disconnected;

[0083] S430, determining whether the input voltage P is greater than or equal to a preset voltage threshold Pt;

[0084] S440, if yes, control the switch circuit to be turned on;

[0085] S450, if not, determining whether the switch circuit performs a disconnection action;

[0086] S460, if the switch circuit performs the disconnection action, set i=i+1 to update the disconnection times of the switch circuit;

[0087] S470, if the switch circuit does not perform the disconnection action, set i=i, and keep the last disconnection number;

[0088] S480, determining a disconnection duration T according to the updated disconnection count;

[0089] S490, accumulating the disconnection time t of the switch circuit;

[0090] S4100, determine whether the disconnection time t of the switch circuit is greater than or equal to the disconnection duration T, if yes, return to step S430, if not, return to step S490.

[0091] In the embodiment of the present application, after controlling the switch circuit 120 to disconnect and before determining the disconnection duration according to the number of disconnections of the switch circuit 120 , the main control circuit 130 further updates the number of disconnections of the switch circuit 120 .

[0092] For example, if the last cumulative disconnection count of the switch circuit 120 is 3, then after the main control circuit 130 controls the switch circuit 120 to disconnect, it adds 1 to the last cumulative disconnection count to update the disconnection count, that is, the current disconnection count of the switch circuit becomes 4. The main control circuit 130 then performs relevant calculations based on the disconnection count of 4 to obtain the disconnection duration.

[0093] It should be noted that in the embodiment of the present application, when the main control circuit 130 detects that the input voltage P is less than the preset voltage threshold Pt, if the switch circuit 120 is currently in the on state, it is necessary to control the switch circuit 120 to perform a disconnection action, thereby switching the switch circuit 120 to the off state. In this case, the updated disconnection count of the switch circuit 120 is calculated by adding 1 to the previous disconnection count. If the switch circuit 120 is currently in the off state, it is not necessary to control the switch circuit 120 to perform a disconnection action; it is sufficient to control the switch circuit 120 to maintain the off state. In this case, since the switch circuit 120 has not performed a disconnection action, the updated disconnection count remains the previous disconnection count. For example, if the current cumulative disconnection count i of the switch circuit 120 is 3, if the main control circuit 130 controls the switch circuit 120 to perform a disconnection action, the disconnection count i is updated to 4. If the main control circuit 130 controls the switch circuit 120 not to perform a disconnection action, the disconnection count i is updated to 3.

[0094] The embodiments of the present application accurately update the number of times the switch circuit 120 is disconnected, making it possible to accurately determine the disconnection duration based on the number of times the switch circuit 120 is disconnected, thereby accurately determining the duration for each time the switch circuit 120 is in the disconnected state. Determining the disconnection duration based on the updated number of disconnections can avoid situations where the power supply time of the electronic device is wasted due to excessively long disconnection durations in strong light conditions. It can also avoid situations where the switch circuit 120 is repeatedly turned on and off in low-light environments due to excessively short disconnection durations.

[0095] In one embodiment of the present application, referring to Figure 5 , Figure 5 This is another example diagram of the control process of the photovoltaic power supply circuit provided in the embodiment of the present application, which is also composed of Figure 1 The main control circuit 130 of the photovoltaic power supply circuit 100 shown in FIG. Figure 5 , including the following steps:

[0096] S510, obtaining an input voltage P received by the MPPT main power circuit from the photovoltaic module;

[0097] S520, let i=0, where i is the number of times the switch circuit is disconnected;

[0098] S530, determining whether the input voltage P is greater than or equal to a preset voltage threshold Pt;

[0099] S540, if yes, control the switch circuit to be turned on;

[0100] S550, if not, determining whether the switch circuit performs a disconnection action;

[0101] S560, if the switch circuit performs the disconnection action, set i=i+1 to update the disconnection times of the switch circuit;

[0102] S570, if the switch circuit does not perform the disconnection action, set i=i, and update the disconnection count to keep the last disconnection count;

[0103] S580, let T = i 2 *t S , where T is the disconnection duration, i represents the number of disconnections, and t S Indicates unit duration;

[0104] S590, accumulating the disconnection time t of the switch circuit;

[0105] S5100, determine whether the disconnection time t of the switch circuit is greater than or equal to the disconnection duration T, if yes, return to step S530, if not, return to step S590.

[0106] In the embodiment of the present application, the method for determining the disconnection duration according to the number of disconnections of the switch circuit 120 includes:

[0107] The disconnection duration is equal to the product of the square of the number of disconnections and the unit duration.

[0108] In the embodiment of the present application, the disconnection duration is equal to the product of the square of the number of disconnections and the unit duration, which can be implemented by the following formula:

[0109] T=t×N 2 ;

[0110] Wherein, T represents the disconnection time, t represents the preset unit time, and N represents the number of disconnections of the switch circuit.

[0111] For example, the preset unit time length t is 10 seconds. When the number of disconnection times N of the switch circuit is 1, the disconnection time length can be calculated as T=10×1 2 = 10 seconds. When the number of disconnections N of the switch circuit is 2, the disconnection time can be calculated as T = 10 × 2 2 = 40 seconds. When the number of disconnections N of the switch circuit is 3, the disconnection time can be calculated as T = 10 × 3 2 =90 seconds. In this way, the disconnection time length during which the switch circuit 120 is controlled to remain in the disconnected state can be calculated accordingly.

[0112] In the embodiment of the present application, a specific calculation method for the disconnection duration and the number of disconnections of the switch circuit is provided, so that the disconnection duration can be calculated based on the number of disconnections of the switch circuit 120. The greater the number of disconnections, the more frequently the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 10 is less than the preset voltage threshold. This indicates that the current lighting environment is not ideal and the light intensity may be weak. In this case, the disconnection duration of the switch circuit 120 is also controlled to be longer accordingly. Therefore, in a continuous low-light environment, due to the longer disconnection duration, the switching frequency of the switch circuit 120 on and off can be reduced, thereby reducing the probability of damage to the switch circuit 120.

[0113] It should be noted that the unit duration in the embodiment of the present application can be set and adjusted according to actual conditions and specific needs. For example, it can be set to 5 seconds, 10 seconds, etc. The embodiment of the present application does not specifically limit the unit duration.

[0114] In one embodiment of the present application, referring to Figure 6 , Figure 6 This is another example diagram of the control process of the photovoltaic power supply circuit provided in the embodiment of the present application, which is also composed of Figure 1 The main control circuit 130 of the photovoltaic power supply circuit 100 shown in FIG. Figure 6 , including the following steps:

[0115] S610, obtaining an input voltage P received by the MPPT main power circuit from the photovoltaic module;

[0116] S620, let i=0, where i is the number of times the switch circuit is disconnected;

[0117] S630, determining whether the input voltage P is greater than or equal to a preset voltage threshold Pt;

[0118] S640, if yes, control the switch circuit to be turned on;

[0119] S650, if not, determining whether the switch circuit performs a disconnection action;

[0120] S660, if the switch circuit performs the disconnection action, set i=i+1 to update the disconnection times of the switch circuit;

[0121] S670, if the switch circuit does not perform the disconnection action, set i=i, update the disconnection count to keep the last disconnection count;

[0122] S680, determining whether the updated disconnection count i is greater than or equal to a preset count threshold n;

[0123] S690, if not, set T=i 2 *t S , where T is the disconnection duration, i represents the number of disconnections, and tS Indicates unit duration;

[0124] S6100, if yes, let T = Tm, where T represents the disconnection duration and Tm represents the preset duration;

[0125] S6110, accumulating the disconnection time t of the switch circuit;

[0126] S6120, determine whether the disconnection time t of the switch circuit is greater than or equal to the disconnection duration T, if yes, return to step S630, if not, return to step S6110.

[0127] In the embodiment of the present application, the method for determining the disconnection duration according to the number of disconnections of the switch circuit 120 includes:

[0128] If the number of disconnections of the switch circuit 120 exceeds a preset threshold, the disconnection duration is fixed to the preset duration.

[0129] For example, when the switch circuit 120 is disconnected more than eight times, the disconnection duration of the switch circuit 120 is fixed at 10 minutes. That is, when it is detected that the switch circuit 120 has been disconnected more than eight times, the main control circuit 130 controls the switch circuit 120 to remain in the disconnected state for 10 minutes before re-checking whether the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 10 is greater than or equal to the preset voltage threshold.

[0130] In the embodiments of the present application, the disconnection duration determined based on a high number of disconnections can be very long. Excessively long disconnection durations may prevent the input voltage P from being used to power the electronic device 20 in a timely and effective manner. Specifically, if the disconnection duration is too long, the main control circuit 130 will not detect the input voltage P during the disconnection duration. At this time, due to changes in the lighting environment—for example, from cloudy to sunny weather, the lighting environment may change from a low-light environment to a high-light environment. During this process, the input voltage P will inevitably become greater than or equal to the preset voltage threshold Pt. However, if the disconnection duration is too long, even if the input voltage P exceeds the preset voltage threshold Pt, the main control circuit 130 will not re-acquire the input voltage P because the switch circuit 120 is still in the disconnected state. Consequently, the main control circuit 130 will not be able to promptly detect that the input voltage P has exceeded the preset voltage threshold Pt. Consequently, the electronic device 20 may not be powered in a timely manner after the light intensity increases. In the embodiments of the present application, when the number of disconnections of the switch circuit 120 exceeds the preset threshold, the disconnection duration is fixed to the preset duration. That is, after the number of disconnections exceeds the preset threshold, the disconnection duration remains unchanged even if the switch circuit 120 is disconnected again. This can avoid the situation where the disconnection time is too long, so that the input voltage P can be used to power the electronic device 20 in a timely and effective manner after the light becomes stronger.

[0131] In one embodiment of the present application, the photovoltaic power supply circuit further includes a temperature sensor, which can be used to obtain current temperature data. Figure 7 , Figure 7 This is a flowchart of the steps of the method for determining the disconnection time according to the number of disconnections of the switch circuit according to the embodiment of the present application. Figure 1 The main control circuit 130 of the photovoltaic power supply circuit 100 shown in FIG. 10 executes, including but not limited to, steps S710 to S720.

[0132] Step S710, obtaining current temperature data through a temperature sensor;

[0133] Step S720: determining the disconnection duration according to the temperature data and the number of disconnections of the switch circuit.

[0134] In the embodiments of the present application, it is considered that determining the disconnection duration based solely on the number of disconnections of the switch circuit 120 is not accurate enough, or in other words, in some smaller scenarios, determining the disconnection duration based solely on the number of disconnections of the switch circuit 120 will result in the inability to timely and effectively utilize the input voltage to power the electronic device 20. For example, when the number of disconnections is large, the disconnection duration calculated based on the number of disconnections will be relatively long. However, an excessively long disconnection duration will result in the inability to timely and effectively utilize the input voltage to power the electronic device 20. In this case, the current temperature data can be obtained through a temperature sensor, and the disconnection duration can be determined based on the temperature data and the number of disconnections of the switch circuit 120.

[0135] In the embodiment of the present application, it is considered that temperature data also has a certain ability to characterize the current lighting environment. That is, the temperature is lower when the light is weak, and the temperature is higher when the light is strong. Therefore, the disconnection time can be determined by combining the temperature and the number of disconnections. For example, the number of disconnections of the switch circuit 120 can be calculated according to the formula T = t × N 2 Calculate the disconnection time T. Then obtain the current temperature. When the current temperature exceeds the first preset temperature T1, the calculated disconnection time T is reduced to When the current temperature exceeds the second preset temperature T2, the calculated disconnection time T is shortened to When the current temperature exceeds the third preset temperature T3, the calculated disconnection time T is reduced to 0, that is, when it is detected that the current temperature exceeds the third preset temperature T3, the control switch circuit 120 is disconnected and the input voltage is immediately re-obtained, and it is determined whether the re-obtained input voltage is greater than or equal to the preset voltage threshold.

[0136] In the embodiment of the present application, the disconnection duration is determined by combining the temperature and the number of disconnections, and the node at which the main control circuit 130 reacquires the input voltage can also be determined by temperature data. That is, the corresponding disconnection duration is first calculated by the number of disconnections of the switch circuit 120. Then the switch circuit 120 is controlled to remain in the disconnected state. When the disconnection time of the switch circuit 120 does not reach the disconnection duration, if it is detected that the temperature reaches the fourth preset temperature threshold T4, the main control circuit 130 will reacquire the input voltage and then determine the size of the input voltage and the preset voltage threshold. When the disconnection time of the switch circuit 120 does not reach the disconnection duration, if the detected temperature is less than the fourth preset temperature threshold T4, then when the disconnection time of the switch circuit 120 reaches the disconnection duration, the main control circuit 130 will reacquire the input voltage and then determine the size of the input voltage and the preset voltage threshold.

[0137] For example, the disconnection duration, determined based on the number of disconnections, is 10 minutes, meaning the main control circuit 130 controls the switch circuit 120 to be in the disconnected state for 10 minutes. During these 10 minutes, if the current temperature acquired by the temperature sensor exceeds the fourth preset temperature threshold T4, the main control circuit 130 will recheck whether the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 101 is greater than or equal to the preset voltage threshold. For example, if the current temperature exceeds the preset temperature threshold at the 8th minute, the main control circuit 130 will re-acquire the input voltage. That is, when the disconnection time of the switch circuit 120 reaches 8 minutes, the main control circuit 130 will also re-acquire the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 10 is greater than or equal to the preset voltage threshold. At the 8th minute, the disconnection time of the switch circuit 120 has not yet reached 10 minutes, but the main control circuit 130 will return to the step of acquiring the input voltage. As can be seen, when the temperature data indicates that the current environment is a strong light environment, the main control circuit 130 can re-acquire the input voltage and compare the re-acquired input voltage with the preset voltage threshold. In other words, by shortening the disconnection time, the input voltage can be quickly determined when the current environment changes to a strong light environment, thereby controlling the switch circuit 120 to conduct and power the electronic device 20 earlier.

[0138] The present application may also calculate the disconnection duration based on temperature data and the number of disconnections of the switch circuit 120 according to other calculation formulas, and the present application does not impose any limitation on this.

[0139] For example, referring to Figure 8 , Figure 8 This is another example diagram of the control process of the photovoltaic power supply circuit provided in the embodiment of the present application, which is also composed of Figure 1 The main control circuit 130 of the photovoltaic power supply circuit 100 shown in FIG. Figure 8 , including the following steps:

[0140] S810, obtaining an input voltage P received by the MPPT main power circuit from the photovoltaic module;

[0141] S820, let i=0, where i is the number of times the switch circuit is disconnected;

[0142] S830, determining whether the input voltage P is greater than or equal to a preset voltage threshold Pt;

[0143] S840, if yes, control the switch circuit to be turned on;

[0144] S850, if not, determining whether the switch circuit performs a disconnection action;

[0145] S860, if the switch circuit performs the disconnection action, set i=i+1 to update the disconnection count of the switch circuit;

[0146] S870, if the switch circuit does not perform the disconnection action, set i=i, update the disconnection count to keep the last disconnection count;

[0147] S880, determining whether the updated disconnection count i is greater than or equal to a preset count threshold n;

[0148] S890, if not, set T=i 2 *t S , where T is the disconnection duration, i represents the number of disconnections, and t S Indicates unit duration;

[0149] S8100, if yes, let T = Tm, where T represents the disconnection duration and Tm represents the preset duration;

[0150] S8110, accumulating the disconnection time t of the switch circuit;

[0151] S8120, determining whether the current temperature F is greater than or equal to a preset temperature threshold Fm, if yes, returning to step S830;

[0152] S8130, if not, determine whether the disconnection time t of the switch circuit is greater than or equal to the disconnection duration T, if yes, return to step S830, if not, return to step S8110.

[0153] This application Figure 8 The corresponding embodiment uses temperature data as the final determination factor. If the temperature data is greater than or equal to a preset temperature threshold, step S830 is immediately executed to re-determine the input voltage P. This can prevent the switch circuit from remaining disconnected even in the presence of light, making the determination of the disconnection duration more comprehensive and accurate. This can also prevent the disconnection duration determined by the number of disconnections from being too long, preventing the input voltage from being used to power the electronic device in a timely and effective manner.

[0154] In one embodiment of the present application, referring to Figure 9 , Figure 9 This is a flowchart of the steps performed after the control switch circuit is turned on, provided by the embodiment of the present application. Figure 1 The main control circuit 130 of the photovoltaic power supply circuit 100 shown in FIG. 10 executes, including but not limited to, steps S910 to S920.

[0155] Step S910, obtaining the duration of the switch circuit remaining in the on state;

[0156] Step S920: when the duration exceeds the second duration, the number of disconnections of the switch circuit is reset to zero, and the second duration is greater than the first duration.

[0157] The embodiment of the present application takes into account that the disconnection duration is determined based on the number of disconnections of the switch circuit 120, and too many disconnections may result in an excessively long disconnection duration. Therefore, the current lighting environment can be judged by obtaining the duration for which the input voltage is greater than or equal to the preset voltage threshold. When the duration exceeds the second duration, it indicates that the current lighting environment is ideal and the light intensity is strong. At this time, the probability that the input voltage received by the MPPT main power circuit 110 from the photovoltaic component 10 exceeds the preset voltage threshold is high. If the number of disconnections of the switch circuit 120 is not cleared, if the switch circuit 120 is disconnected during a period of strong light intensity, the number of disconnections will be accumulated with the number of disconnections in the previous weak light environment, so that the main control circuit 130 controls the switch circuit 120 to be in a disconnected state. It is necessary to maintain a longer disconnection duration before the input voltage received by the MPPT main power circuit 110 from the photovoltaic component 10 can be re-detected. In reality, during this disconnection duration, the input voltage will exceed the preset voltage threshold and can power the electronic device. However, since the main control circuit 130 does not detect this, it will not control the switch circuit 120 to conduct and power the electronic device 20. This will result in wasting time for effective power supply under ideal power supply conditions. Therefore, in this embodiment of the application, when the input voltage is greater than or equal to the preset voltage threshold for a period exceeding a second time period, the number of disconnections of the switch circuit 120 is reset to zero.

[0158] It should be noted that in the embodiment of the present application, the second duration is a longer time, such as 5 minutes. The first duration is a shorter time, such as 2 seconds. The first duration is intended to prevent the MPPT main power circuit 110 from controlling the switch circuit 120 to conduct when the input voltage received from the photovoltaic module 10 instantly exceeds a preset voltage threshold. The second duration is intended to determine a parameter of the current lighting environment. That is, when the duration for which the switch circuit 120 remains in the on state exceeds the second duration, it can, to a certain extent, indicate that the current light intensity is strong and the lighting environment is good.

[0159] For example, referring to Figure 10 , Figure 10 This is another example diagram of the control process of the photovoltaic power supply circuit provided in the embodiment of the present application, which is also composed of Figure 1 The main control circuit 130 of the photovoltaic power supply circuit 100 shown is executed.

[0160] Reference Figure 10 , including the following steps:

[0161] S1010, obtaining an input voltage P received by the MPPT main power circuit from the photovoltaic module;

[0162] S1020, let i=0, where i is the number of times the switch circuit is disconnected;

[0163] S1030, determining whether the input voltage P is greater than or equal to a preset voltage threshold Pt;

[0164] S1040, if yes, control the switch circuit to be turned on;

[0165] S1050, accumulating the duration tn during which the switch circuit remains in the on state;

[0166] S1060, determining whether the duration tn exceeds the second duration Tn, if so, returning to step S1020, if not, returning to step S1050;

[0167] S1070, if not, determine whether the switch circuit performs a disconnection action;

[0168] S1080, if the switch circuit performs an opening action, set i=i+1 to update the number of times the switch circuit is opened;

[0169] S1090, if the switch circuit does not perform the disconnection action, set i=i, update the disconnection count to keep the last disconnection count;

[0170] S10100, determining whether the updated disconnection count i is greater than or equal to a preset count threshold n;

[0171] S10110, if not, set T=i 2 *t S , where T is the disconnection duration, i represents the number of disconnections, and t S Indicates unit duration;

[0172] S10120, if yes, let T=Tm, where T represents the disconnection duration and Tm represents the preset duration;

[0173] S10130, accumulating the disconnection time t of the switch circuit;

[0174] S10140, determining whether the current temperature F is greater than or equal to a preset temperature threshold Fm, if yes, returning to step S1030;

[0175] S10150, if not, determine whether the disconnection time t of the switch circuit is greater than or equal to the disconnection duration T, if yes, return to step S1030, if not, return to step S10130.

[0176] After the main control circuit 130 of the embodiment of the present application controls the switch circuit 130 to be turned on, it determines whether the environment is in a continuous strong light environment by accumulating the duration tn of the switch circuit 120 remaining in the on state. Specifically, if the duration tn of the switch circuit remaining in the on state exceeds the second duration Tn, it can be determined that the environment is in a continuous strong light environment. At this time, the control logic in the low-light environment can be exited by resetting the number of disconnections. That is, when the current environment changes to a low-light environment, since the number of disconnections is reset, the calculation of the disconnection duration in the low-light environment can be re-entered, without accumulating the number of disconnections before the environment changes, resulting in an inaccurate calculated disconnection duration.

[0177] In one embodiment of the present application, referring to Figure 11 , Figure 11 This is a flowchart of the steps for clearing the number of disconnections of a control switch circuit provided by an embodiment of the present application. Figure 1 The main control circuit 130 of the photovoltaic power supply circuit 100 shown executes, including but not limited to, steps S1110 to S1120.

[0178] Step S1110, obtaining environmental parameters, which include environmental information of the power distribution equipment;

[0179] Step S1120: When the environmental parameters meet the preset conditions, the number of disconnections of the switch circuit is reset to zero.

[0180] In the embodiment of the present application, in addition to determining whether the number of disconnections of the switch circuit 120 needs to be reset to zero by the duration that the switch circuit 120 remains in the on state, it is also possible to determine whether the number of disconnections of the switch circuit 120 needs to be reset to zero by using environmental parameters. Similarly, when the environmental parameters meet the preset conditions, it means that the current lighting environment is ideal. At this time, the probability that the input voltage received by the MPPT main power circuit 110 from the photovoltaic module 10 exceeds the preset voltage threshold is relatively high. By resetting the number of disconnections of the switch circuit 120, it is possible to control to a certain extent that the duration of disconnection of the switch circuit 120 once it is disconnected will not be too long, thereby ensuring that when the lighting environment is ideal, the electronic device is effectively powered and the power supply efficiency is improved.

[0181] For example, when the current temperature is detected to be greater than a temperature threshold, it can indirectly indicate that the current light intensity is strong or the current lighting environment is good. Alternatively, when the weather type is detected to be sunny and the temperature is within a preset temperature range, it can also indirectly indicate that the current light intensity is strong or the current lighting environment is good. In both cases, the number of disconnections of the switch circuit 120 can be reset to zero to promptly exit the low-light state.

[0182] Specifically, for example, when it is detected that the temperature is within the temperature range of T1-T2 for a period of time t, the number of disconnections of the switch circuit 120 may be reset. Alternatively, when it is detected that the temperature is greater than the first temperature threshold for a period of time t, the number of disconnections of the switch circuit 120 may also be reset. Alternatively, when it is detected that the weather condition is sunny for a period of time t, the number of disconnections of the switch circuit 120 may be reset. Alternatively, when it is detected that the current weather condition is sunny for a period of time t and the temperature is within the temperature range of T1-T2 for a period of time t, the number of disconnections of the switch circuit 120 may be reset. Alternatively, when it is detected that the current weather condition is sunny for a period of time t and the temperature is greater than the first temperature threshold for a period of time t, the number of disconnections of the switch circuit 120 may also be reset.

[0183] For example, referring to Figure 12 , Figure 12 This is an example flow chart of the process of clearing the number of disconnections of the control switch circuit provided by the embodiment of the present application. Figure 1 The main control circuit 130 of the photovoltaic power supply circuit 100 shown in FIG. 1 is executed, including the following steps:

[0184] S1210, start;

[0185] S1220, let i=0, i represents the number of times the switch circuit is disconnected;

[0186] S1230, accumulating the duration tn during which the switch circuit remains in the on state;

[0187] S1240, determining whether the duration tn during which the switch circuit remains in the on state exceeds a second duration Tn;

[0188] S1250, if yes, return to step S1220, if no, determine whether the environmental parameters meet the preset conditions, if yes, return to step S1220, if no, return to step S1230.

[0189] In the embodiment of the present application, the duration tn of the switch circuit 120 remaining in the on state is first accumulated. If the duration tn exceeds a second duration Tn, it indicates that the current environment is in a continuous strong light environment, and the number of disconnections of the switch circuit 120 can be reset. If the duration tn does not exceed the second duration Tn, a further determination is made as to whether the environmental parameters meet a preset condition. If so, it can also be determined that the current environment is in a continuous strong light environment, and the number of disconnections of the switch circuit 120 can be reset. However, if the duration tn does not exceed the second duration Tn, and the environmental parameters are determined to not meet the preset condition, it indicates that the current environment is not in a continuous strong light environment. In this case, the number of disconnections of the switch circuit 120 cannot be reset. In other words, the control logic for the low-light environment cannot be exited. In the embodiment of the present application, by comprehensively determining whether the current environment is in a continuous strong light environment based on whether the duration tn of the switch circuit 120 remaining in the on state exceeds the second duration and whether the environmental parameters meet the preset condition, the accuracy of the determination of whether the current environment is in a continuous strong light environment can be improved.

[0190] In one embodiment of the present application, referring to Figure 13 , Figure 13 This is another schematic block diagram of the photovoltaic power supply circuit provided by the embodiment of the present application. Figure 13 As shown, photovoltaic power supply circuit 1300 includes an MPPT main power circuit 1310, a switch circuit 1320, a main control circuit 1330, and a power consumption circuit 1340. Both MPPT main power circuit 1310 and switch circuit 1320 are connected to main control circuit 1330. MPPT main power circuit 1310 is used to connect to photovoltaic module 10, while switch circuit 1320 is connected between MPPT main power circuit 1310 and electronic device 20. Power consumption circuit 1340 is connected between photovoltaic module 10 and MPPT main power circuit 1310.

[0191] The power consumption circuit 1340 is used to consume the output power of the photovoltaic assembly 10 when no disconnection signal is received.

[0192] In such Figure 13 In the photovoltaic power supply circuit shown, the main control circuit 1330 further performs the following steps:

[0193] If the number of disconnections of the switch circuit 1320 exceeds the preset number threshold, a disconnection signal is sent to the power consumption circuit 1340 , and the process returns to the step of obtaining the input voltage received by the MPPT main power circuit 1310 from the photovoltaic assembly 10 .

[0194] In the embodiment of the present application, the power consumption circuit 1340 is configured to consume the output power of the photovoltaic assembly 10 when it does not receive a disconnect signal. This prevents the MPPT main power circuit 1310 from reactivating when the output voltage of the photovoltaic assembly 10 is less than a first preset voltage value. This prevents the MPPT main power circuit 1310 from repeatedly restarting when the output power of the photovoltaic assembly 10 is low. Furthermore, in the embodiment of the present application, when the number of disconnections of the switch circuit exceeds a preset threshold, it indicates that the current lighting environment is poor and the light intensity is low. In this case, if a disconnect signal is not sent to the power consumption circuit 1340, the power consumption circuit 1340 will continue to consume the output power of the photovoltaic assembly 10, which may cause the input voltage received by the MPPT main power circuit 1310 from the photovoltaic assembly 10 to remain less than the preset voltage threshold. This can cause the switch circuit 1320 to remain disconnected as the lighting environment changes, preventing the electronic device 20 from charging. Therefore, in the embodiment of the present application, when the number of disconnections of the switch circuit 1320 exceeds the preset threshold, a disconnect signal is sent to the power consumption circuit 1340 to prevent the power consumption circuit 1340 from continuing to consume the output power of the photovoltaic assembly 10. Therefore, after the lighting environment transitions from a low-light environment to a high-light environment, the input voltage received by the MPPT main power circuit 1310 from the photovoltaic module 10 can more quickly exceed the preset voltage threshold. Therefore, during the transition from a low-light environment to a high-light environment, by preventing the power consumption circuit 1340 from consuming the output power of the photovoltaic module 10, the input voltage received by the MPPT main power circuit 1310 from the photovoltaic module 10 can more quickly exceed the preset voltage threshold. This allows the switch circuit 120 to be turned on earlier, providing power to the electronic device 20.

[0195] It is understandable that the photovoltaic components in any embodiment of the present application may be solar panels or other photovoltaic devices that can directly convert solar radiation energy into electrical energy.

[0196] In the embodiment of the present application, solar panels or other photovoltaic devices that can directly convert solar radiation energy into electrical energy are used. Figure 1 or Figure 13 The photovoltaic power supply circuit is connected to the electronic device. The electrical energy converted from solar radiation can be used to power the electronic device. By connecting to the MPPT main power circuit of the photovoltaic power supply circuit, an input voltage can be provided to the MPPT main power circuit. This allows the photovoltaic power supply circuit's main control circuit to control the switching circuit based on a comparison between the input voltage and a preset voltage threshold. This effectively charges the electronic device while also preventing the switching circuit from repeatedly turning on and off in low-light environments, thereby preventing damage to the switching circuit due to repeated on and off cycles.

[0197] Reference Figure 1The present application also provides a photovoltaic power supply circuit 100, comprising an MPPT (Maximum Power Point Tracking) main power circuit 110, a switch circuit 120, and a main control circuit 130. The MPPT main power circuit 110 and the switch circuit 120 are both connected to the main control circuit 130. The main control circuit 130 is used to control the MPPT main power circuit 110 and the switch circuit 120. The MPPT main power circuit 110 is used to connect to the photovoltaic module 10, and the switch circuit 120 is connected between the MPPT main power circuit 110 and the electronic device 20.

[0198] The main control circuit 130 of the present application is used to execute the above control method. The photovoltaic power supply circuit 100 of the present application can prevent the switch circuit from being repeatedly turned on and off during weak light power supply, thereby preventing the switch circuit from being damaged due to repeated turning on and off. At the same time, since the switch circuit will not be repeatedly turned on and off, the electronic equipment can also maintain a stable and effective power supply.

[0199] Reference Figure 14 An embodiment of the present application further provides an electronic device 1400, including a photovoltaic power supply circuit 1401 provided in any embodiment of the present application. Therefore, the electronic device 1400 of the present application can avoid the situation where the switching circuit is repeatedly turned on and off during weak light power supply, thereby avoiding the phenomenon that the switching circuit is damaged due to repeated turning on and off. At the same time, since the switching circuit will not be repeatedly turned on and off, the electronic device can also maintain stable and effective power supply.

[0200] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the contents disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed in this application.

[0201] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A control method for a photovoltaic power supply circuit, characterized in that: The photovoltaic power supply circuit is used to power the electronic device, and the photovoltaic power supply circuit includes an MPPT main power circuit, a switch circuit, a temperature sensor and a power consumption circuit. The MPPT main power circuit is used to connect to the photovoltaic module, the switch circuit is connected between the MPPT main power circuit and the electronic device, and the power consumption circuit is connected between the photovoltaic module and the MPPT main power circuit. The power consumption circuit is used to consume the output power of the photovoltaic module when no disconnection signal is received; The method comprises: Obtaining an input voltage received by an MPPT main power circuit from the photovoltaic component; When the input voltage is greater than or equal to a preset voltage threshold and maintains for a first time period, controlling the switch circuit to be turned on so that the MPPT main power circuit supplies power to the electronic device; When the input voltage is less than the preset voltage threshold, controlling the switch circuit to disconnect, and updating the disconnection times of the switch circuit; Acquiring current temperature data through the temperature sensor, and determining a disconnection duration based on the temperature data and the number of disconnections of the switch circuit, and returning to the step of acquiring the input voltage received by the MPPT main power circuit from the photovoltaic module after the disconnection time of the switch circuit reaches the disconnection duration; If the number of disconnections of the switch circuit exceeds a preset threshold, the disconnection signal is sent to the power consumption circuit, and the process returns to the step of obtaining the input voltage received by the MPPT main power circuit from the photovoltaic assembly.

2. The method according to claim 1, characterized in that The method for determining the disconnection duration according to the number of disconnections of the switch circuit includes: The disconnection duration is equal to the product of the square of the disconnection times and the unit duration.

3. The method according to claim 1, characterized in that The method for determining the disconnection duration according to the number of disconnections of the switch circuit includes: If the number of disconnections of the switch circuit exceeds a preset number threshold, the disconnection duration is fixed to a preset duration.

4. The method according to claim 1, wherein After controlling the switch circuit to be turned on, the method further includes: Obtaining a duration during which the switch circuit remains in an on state; When the duration exceeds the second duration, the number of disconnections of the switch circuit is reset to zero, and the first The second duration is greater than the first duration.

5. The method according to claim 1, wherein The method further comprises: Acquiring environmental parameters, wherein the environmental parameters include environmental information of the power distribution equipment; When the environmental parameters meet the preset conditions, the number of disconnections of the switch circuit is reset to zero.

6. A photovoltaic power supply circuit, characterized in that: Used to power electronic equipment, including an MPPT main power circuit, a switch circuit, a temperature sensor, a power consumption circuit and a main control circuit, wherein the MPPT main power circuit and the switch circuit are both connected to the main control circuit; The MPPT main power circuit is used to connect to the photovoltaic module, and the switch circuit is connected between the MPPT main power circuit and the electronic device; The power consumption circuit is connected between the photovoltaic assembly and the MPPT main power circuit, and is used to consume the output power of the photovoltaic assembly when no disconnection signal is received; The main control circuit is used to execute the method according to any one of claims 1 to 5.

7. An electronic device, characterized in that: Comprising the photovoltaic power supply circuit as claimed in claim 6.

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