Power supply management device and control method thereof

Abstract

The application discloses a power supply management device, which comprises a power module, a detection module 1, a detection module 2, an execution module, a control module, a bypass module, a support module 1, a support module 2 and an auxiliary module. The power module is electrically connected with the detection module 1, the detection module 2, the execution module, the control module, the bypass module and the auxiliary module respectively; the detection module 1 is electrically connected with the detection module 2, the execution module and the control module respectively; the detection module 2 is electrically connected with the execution module, the control module and the bypass module respectively; the execution module is electrically connected with the control module, the bypass module, the support module 1, the support module 2 and the auxiliary module respectively; the control module is electrically connected with the support module 1, the support module 2 and the auxiliary module respectively; the bypass module is electrically connected with the support module 1, the support module 2 and the auxiliary module respectively; the support module 1 is electrically connected with the support module 2 and the auxiliary module respectively; and the support module 2 is electrically connected with the support module 1 and the auxiliary module respectively.

Description

Technical Field

[0001] This invention relates to the field of solar energy technology, and more specifically to a power supply management device and its control method. Background Technology

[0002] In existing smart junction boxes, the solar panels are connected to the solar system, and the power supply for the control unit inside the smart junction box is taken from the solar panels. However, when the panels are blocked, damaged, or otherwise bypassed by the bypass diode connected in parallel, the power supply inside the smart junction box will be interrupted. Traditional smart junction boxes stop supplying power when and after the solar panels are bypassed by the bypass diode and no longer monitor the operating status of the panels.

[0003] The drawback of existing technology is that the operating status of solar modules when or after being bypassed reflects their overall condition. Traditional smart junction boxes, by cutting off power when the modules are bypassed, cannot detect these changes, hindering fault and condition diagnosis. This is particularly problematic when solar modules are used in building-integrated photovoltaics (BIPV), solar tiles, solar bricks, and solar pavements. Stress generated during installation or long-term use can cause microcracks and other issues that often manifest immediately upon bypassing. Traditional smart junction boxes, lacking power when bypassed, cannot detect these problems. Summary of the Invention

[0004] This invention provides a power supply management device and its control method, which can initiate an emergency power supply process when a solar module is bypassed, so that the solar module can still maintain power supply during and for a period of time after entering the bypass state. This ensures that the system efficiency is not lost and maximizes efficiency. At the moment the module is bypassed, the voltage across the two ends of the solar module can be detected and the status of the solar module can be diagnosed immediately. The device can detect the working state of the solar module during and after the bypass, providing a method for performing solar module status diagnosis.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] This invention provides a power supply management device and its control method. The power supply management device includes: a power supply module, a detection module 1, a detection module 2, an execution module, a control module, a bypass module, a support module 1, a support module 2, and an auxiliary module. The power supply module is electrically connected to the detection module 1, the detection module 2, the execution module, the control module, the bypass module, and the auxiliary module. The detection module 1 is electrically connected to the detection module 2, the execution module, and the control module. The detection module 2 is electrically connected to the execution module, the control module, and the bypass module. The execution module is electrically connected to the control module, the bypass module, the support module 1, the support module 2, and the auxiliary module. The control module is electrically connected to the support module 1, the support module 2, and the auxiliary module. The bypass module is electrically connected to the support module 1, the support module 2, and the auxiliary module. The support module 1 is electrically connected to the support module 2 and the auxiliary module. The support module 2 is electrically connected to the support module 1 and the auxiliary module.

[0007] Preferably, the power module includes: a solar panel (P), a bypass diode (DO), a flyback converter (F), and an energy storage capacitor (C1); the positive terminal of the solar panel (P) is electrically connected to the positive terminal of the bypass diode (DO), the primary side of the flyback converter (F), and one end of the energy storage capacitor (C1); the negative terminal of the solar panel (P) is electrically connected to the negative terminal of the bypass diode (DO); the other end of the energy storage capacitor (C1) is electrically connected to the primary side of the flyback converter (F); and the secondary side of the flyback converter (F) is electrically connected to the control module and the auxiliary module.

[0008] Preferably, the detection module 1 is a shunt (R1); the input terminal of the shunt (R1) is electrically connected to the negative terminal of the solar module (P); the output terminal of the shunt (R1) is electrically connected to the primary side of the flyback converter (F); and the signal sampling terminal of the shunt (R1) is electrically connected to the control module.

[0009] Preferably, the detection module 1 is a voltage divider (M); one end of the voltage divider (M) is electrically connected to one end of the energy storage capacitor (C1); the other end of the voltage divider (M) is electrically connected to the other end of the energy storage capacitor (C1); and the sampling terminal of the voltage divider (M) is electrically connected to the control module.

[0010] Preferably, the execution module is a switching transistor (S1); the drain of the switching transistor (S1) is electrically connected to the output of the shunt (R1); the gate of the switching transistor (S1) is electrically connected to the control module; and the source of the switching transistor (S1) is electrically connected to the support module 1.

[0011] Preferably, the control module includes: a signal processor (T), a programmable element (L), and a drive unit (U); the programmable element (L) is electrically connected to the signal processor (T) and the drive unit (U) respectively; the signal processor (T) is electrically connected to the signal sampling pole of the shunt (R1) and the sampling pole of the voltage divider respectively; the drive unit (U) is electrically connected to the gate of the switching transistor (S1).

[0012] Preferably, the bypass module is a bypass diode (D1); the negative terminal of the bypass diode (D1) is electrically connected to one end of the voltage divider (M) and the positive terminal of the device output terminal, respectively; the positive terminal of the bypass diode (D1) is electrically connected to the source of the switching transistor (S1).

[0013] Preferably, the support module 1 includes: a switching transistor (S2), a Zener diode (Z1), and an energy storage capacitor (C2); the source of the switching transistor (S2) is electrically connected to one end of the Zener diode (Z1), one end of the energy storage capacitor (C2), and the positive terminal of the bypass diode (D1); the drain of the switching transistor (S2) is electrically connected to the other end of the Zener diode (Z1), the other end of the energy storage capacitor (C2), and the negative terminal of the device output; the gate of the switching transistor (S2) is electrically connected to the driving unit (U).

[0014] Preferably, the bypass module 2 includes: a switching transistor (S3), a Zener diode (Z2), and an energy storage capacitor (C3); the source of the switching transistor (S3) is electrically connected to the positive terminal of the bypass diode (D1), one end of the Zener diode (Z2), and one end of the energy storage capacitor (C3); the drain of the switching transistor (S3) is electrically connected to the other end of the Zener diode (Z2), the other end of the energy storage capacitor (C3), and the drain of the switching transistor (S2); the gate of the switching transistor (S3) is electrically connected to the driving unit (U).

[0015] Preferably, the auxiliary module is an auxiliary power supply (V); the positive terminal of the auxiliary power supply (V) is electrically connected to the drain of the switching transistor (S3); the negative terminal of the auxiliary power supply (V) is electrically connected to the source of the switching transistor (S3); and the output terminal of the auxiliary power supply (V) is electrically connected to the secondary side of the flyback converter (F) and the control module.

[0016] Advantageously, the control method based on this power supply management device includes the following steps:

[0017] H1: Detects the output voltage of the solar panel (P);

[0018] H2: Determine whether the output voltage of the solar module (P) is greater than or equal to the first set value;

[0019] If not, then close the switch (S1), open the switch (S2) and the switch (S3), and return to step H1;

[0020] If so, then close the switch transistors (S1), (S2), and (S3), and execute H3;

[0021] H3: Detect the output voltage of the solar module (P) after the switching transistors (S1), (S2), and (S3) are closed;

[0022] H4: Determine whether the output voltage of the solar module (P) detected by H3 is less than the second set value. If not, return to step H3; if yes, disconnect the switch (S2) and the switch (S3) and return to step H1.

[0023] Wherein, the first set value is greater than the second set value.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] Based on the above analysis, this invention proposes a power supply management device and its control method, which solves the defect in the prior art where the solar module stops supplying power when it is bypassed, making it impossible to detect the working status of the solar module. It enables the solar module to maintain power supply when it is bypassed and for a period of time after it is bypassed, ensuring that the system efficiency is not lost and maximizing efficiency. It can also diagnose the status of the solar module at the moment the module is bypassed by detecting the voltage across the solar module. At the same time, it provides a method for controlling the implementation of the above functions, which can perform fault diagnosis when the solar module is bypassed and detect the working status after the bypass.

[0026] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0027] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0028] Figure 1 This is a module example diagram of a power supply management device according to the present invention;

[0029] Figure 2 This is an example diagram of components of a power supply management device according to the present invention;

[0030] Figure 3 This is a flowchart illustrating a power supply management device control method according to the present invention. Detailed Implementation

[0031] 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Example 1:

[0033] The power supply management device provided in this embodiment of the invention includes: a power supply module, a detection module 1, a detection module 2, an execution module, a control module, a bypass module, a support module 1, a support module 2, and an auxiliary module.

[0034] like Figure 1 As shown:

[0035] The power supply module is electrically connected to detection module 1, detection module 2, execution module, control module, bypass module, and auxiliary module, respectively; detection module 1 is electrically connected to detection module 2, execution module, and control module, respectively; detection module 2 is electrically connected to execution module, control module, and bypass module, respectively; execution module is electrically connected to control module, bypass module, support module 1, support module 2, and auxiliary module, respectively; control module is electrically connected to support module 1, support module 2, and auxiliary module, respectively; bypass module is electrically connected to support module 1, support module 2, and auxiliary module, respectively; support module 1 is electrically connected to support module 2 and auxiliary module, respectively; support module 2 is electrically connected to support module 1 and auxiliary module, respectively.

[0036] The power module is used to supply power to the power management device.

[0037] The detection module 1 is used to detect the analog current signal output by the solar module.

[0038] The detection module 2 is used to identify the working status of the solar modules.

[0039] The execution module is used to control the operating status of the power supply management device under normal conditions.

[0040] The control module is used to process the analog signals output by detection module 1 and detection module 2 into acceptable analog signals, and to drive the power supply device to start working states under different conditions.

[0041] The bypass module is used to provide a backup power path for the device when the solar modules are shaded or damaged.

[0042] Support module 1 is used to enable the operation of the device when the solar module is partially shaded or in shadow.

[0043] Support module 2 is used to activate the device's operating status when the solar modules are completely blocked or completely damaged.

[0044] The auxiliary module is used to supply power to the control module when the power module loses power.

[0045] When the solar panels are unobstructed and operating normally, the current flows through the support module 1, execution module, detection module 1, and power supply module to ensure the power supply to the device control module.

[0046] When the solar panels are partially shaded or in shadow, the current flowing through the support module 1, execution module, and power module ensures the supply of auxiliary power.

[0047] When all solar panels are blocked or damaged, current flows through support module 2 and bypass module to ensure power supply to the auxiliary module in this scenario, thereby ensuring normal power supply to the control module.

[0048] Example 2:

[0049] The power supply management device provided in this embodiment of the invention includes: a power supply module, a detection module 1, a detection module 2, an execution module, a control module, a bypass module, a support module 1, a support module 2, and an auxiliary module.

[0050] The power supply module is electrically connected to detection module 1, detection module 2, execution module, control module, bypass module, and auxiliary module, respectively; detection module 1 is electrically connected to detection module 2, execution module, and control module, respectively; detection module 2 is electrically connected to execution module, control module, and bypass module, respectively; execution module is electrically connected to control module, bypass module, support module 1, support module 2, and auxiliary module, respectively; control module is electrically connected to support module 1, support module 2, and auxiliary module, respectively; bypass module is electrically connected to support module 1, support module 2, and auxiliary module, respectively; support module 1 is electrically connected to support module 2 and auxiliary module, respectively; support module 2 is electrically connected to support module 1 and auxiliary module, respectively.

[0051] like Figure 2 As shown:

[0052] The power module includes: a solar panel P, a bypass diode D0, a flyback converter F, and an energy storage capacitor C1; the positive terminal of the solar panel P is electrically connected to the positive terminal of the bypass diode D0, the primary side of the flyback converter F, and one end of the energy storage capacitor C1; the negative terminal of the solar panel P is electrically connected to the negative terminal of the bypass diode D0; the other end of the energy storage capacitor C1 is electrically connected to the primary side of the flyback converter F; the secondary side of the flyback converter F is electrically connected to the control module and the auxiliary module.

[0053] The detection module 1 is a shunt R1; the input of the shunt R1 is electrically connected to the negative terminal of the solar module P; the output of the shunt R1 is electrically connected to the primary side of the flyback converter F; and the signal sampling terminal of the shunt R1 is electrically connected to the control module.

[0054] The detection module 1 is a voltage divider M; one end of the voltage divider M is electrically connected to one end of the energy storage capacitor C1; the other end of the voltage divider M is electrically connected to the other end of the energy storage capacitor C1; the sampling electrode of the voltage divider M is electrically connected to the control module.

[0055] The execution module is a switching transistor S1; the drain of the switching transistor S1 is electrically connected to the output of the shunt R1; the gate of the switching transistor S1 is electrically connected to the control module; and the source of the switching transistor S1 is electrically connected to the support module 1.

[0056] The control module includes: a signal processor T, a programmable element L, and a drive unit U; the programmable element L is electrically connected to the signal processor T and the drive unit U respectively; the signal processor T is electrically connected to the signal sampling pole of the shunt R1 and the sampling pole of the voltage divider respectively; the drive unit U is electrically connected to the gate of the switching transistor S1.

[0057] The bypass module is a bypass diode D1; the negative terminal of the bypass diode D1 is electrically connected to one end of the voltage divider M and the positive terminal of the device output, respectively; the positive terminal of the bypass diode D1 is electrically connected to the source of the switching transistor S1.

[0058] Support module 1 includes: a switching transistor S2, a Zener diode Z1, and an energy storage capacitor C2; the source of the switching transistor S2 is electrically connected to one end of the Zener diode Z1, one end of the energy storage capacitor C2, and the positive terminal of the bypass diode D1; the drain of the switching transistor S2 is electrically connected to the other end of the Zener diode Z1, the other end of the energy storage capacitor C2, and the negative terminal of the device output; the gate of the switching transistor S2 is electrically connected to the drive unit U.

[0059] The bypass module 2 includes: a switching transistor S3, a Zener diode Z2, and an energy storage capacitor C3; the source of the switching transistor S3 is electrically connected to the positive terminal of the bypass diode D1, one end of the Zener diode Z2, and one end of the energy storage capacitor C3, respectively; the drain of the switching transistor S3 is electrically connected to the other end of the Zener diode Z2, the other end of the energy storage capacitor C3, and the drain of the switching transistor S2, respectively; the gate of the switching transistor S3 is electrically connected to the drive unit U.

[0060] The auxiliary module is an auxiliary power supply V; the positive terminal of the auxiliary power supply V is electrically connected to the drain of the switching transistor S3; the negative terminal of the auxiliary power supply V is electrically connected to the source of the switching transistor S3; the output terminal of the auxiliary power supply V is electrically connected to the secondary side of the flyback converter F and the control module.

[0061] The solar panels of the power module are used to power the device. The panels have built-in bypass diodes that can provide a freewheeling path for the solar string containing the solar panels when the solar panels are shaded or damaged. The flyback converter F is a standard power module used to power the control module. The energy storage capacitor C1 can provide some support for the main power supply input when the solar panels are bypassed, ensuring a smooth switch between the main power supply and the auxiliary power supply.

[0062] The shunt R1 of detection module 1 is used to detect the analog current signal output by the solar module.

[0063] The voltage divider in detection module 2 can also be a voltage sensor, used to identify the operating status of the solar modules.

[0064] The execution module is used to control the operating status of the power supply management device under normal conditions. When the solar module and its associated control, detection and protection circuits are connected to the solar system, the switch S1 of the execution module is in the conducting state under normal and stable operating conditions. When the solar system starts working, the control module controls the switch S1 to conduct and the switches S2 and S3 to turn off.

[0065] The signal processor T of the control module is used to process the analog signals output by the detection module 1 and the detection module 2 into analog signals acceptable to the AD converter; the programmable element has a built-in AD converter and a built-in non-volatile memory unit or communication unit; the start unit is used to drive the conduction state of the switching transistors S1, S2, and S3; the signal processing unit is used to detect the voltage and / or current and other electrical signals of the solar module and output them to the AD converter inside the programmable element; the drive unit U is used to drive the closing and opening of the switching transistors S1, S2, and S3.

[0066] The bypass module is used to provide a backup power path for the device when the solar modules are shaded or damaged.

[0067] The support module switch S2 is used to enable the operation of the device when the solar module is partially shaded or in shadow. When the solar module is bypassed, the current through the parasitic diode inside the switch S2 generates a voltage of about 0.7V across the energy storage capacitor C2, which can provide voltage for the auxiliary power supply and ensure that the control module continues to be powered. The Zener diode Z1 is used to ensure that the voltage stress on the switch S2 during the switching process is minimized. The energy storage capacitor C2 is used to maintain the stability of the input voltage of the auxiliary module.

[0068] The switching transistor S3 in support module 2 is used to enable the device's operation when the solar module is completely shaded or damaged. When the solar module has no power output capability, the bypass current passes through the parasitic diode inside S3 and the bypass diode D1, thereby ensuring the power supply of the auxiliary power supply and ensuring the normal power supply of the control unit. The Zener diode Z2 is used to ensure that when the solar system string fails and the entire solar system voltage is applied across the bypass diode D1 and the switching transistor S3, the voltage across S3 is not excessively high, reducing the voltage rating requirement for the switching transistor S3 and thus reducing costs. The energy storage capacitor C3 is used to maintain the stability of the auxiliary module's input voltage.

[0069] The auxiliary module is used to supply power to the control module when the power module loses power.

[0070] When the solar panel is operating normally without any obstruction, the current flows out after passing through the switching transistor S2 (without passing through the parasitic diode inside S2), the switching transistor S1, the shunt R1, and the inside of the solar panel, which can ensure the power supply to the device control module.

[0071] When the solar panel is partially shaded or in shadow, the current flows out after passing through the parasitic diode inside the switching transistor S2, the switching transistor S1, the shunt R1, and the inside of the solar panel. Since there is current flowing through the parasitic diode inside S2, the power supply of the auxiliary power supply can be guaranteed.

[0072] When all solar panels are blocked or damaged, the solar panels bypass the circuit. The current through the parasitic diode inside the switching transistor S3 causes a voltage of about 0.7V to be generated across the energy storage capacitor C2, which can provide voltage to the auxiliary power supply and ensure that the control module continues to be powered.

[0073] Example 3:

[0074] like Figure 3 As shown in the figure, an embodiment of the present invention provides a control method for a power supply management device. The power supply management device is described in Embodiment 2. The control method for the power supply management device may include the following steps:

[0075] H1: Detects the output voltage of solar module P;

[0076] H2: Determine whether the output voltage of the solar module P is greater than or equal to the first set value;

[0077] If not, then close switch S1, open switch S2 and switch S3, and return to step H1;

[0078] If so, then close switches S1, S2, and S3, and execute H3;

[0079] H3: Detect the output voltage of the solar module P after switching transistors S1, S2, and S3 are closed;

[0080] H4: Determine whether the output voltage of the solar module P detected by H3 is less than the second set value. If not, return to step H3; if so, disconnect switch S2 and switch S3, and return to step H1.

[0081] The first setting value is greater than the second setting value.

[0082] The first setting value can be any value between 0.1 and 1 times the rated voltage of the solar module; the second setting value can be any value between 0.05 and 0.8 times the rated voltage of the solar module.

[0083] It should be noted that both the first and second settings are set before step H1 detects the output voltage of the solar module.

[0084] In the initial power-on phase, when the output voltage of the solar module is less than the first set value, switch S1 is closed and switches S2 and S3 are opened. The purpose of closing switch S1 is to ensure that the solar module can be put into working state. The purpose of opening switches S2 and S3 is that since the output voltage of the solar module is less than the first set value, the power module is at risk of power failure. Opening switches S2 and S3 can ensure that no matter whether the current flows through S2 or S3, it will pass through the parasitic diode inside S2 or S3. The voltage on the parasitic diode can support the device of the present invention to not lose power when the power module loses power.

[0085] When the output voltage of the solar module is greater than or equal to the first set value, it can be determined that the solar module is in normal working condition or at least the solar module can supply power to the device described in this invention through the power module. At this time, closing the switch tubes S2 and S3 can ensure that if there is current flowing through S2 or S3, the current will not pass through the parasitic diodes inside S2 and S3, which can reduce system losses.

[0086] After the power management device enters the working state, it detects whether the output voltage of the solar module is less than the second set value. The reason is that since S2 and S3 are already closed at this time, if the power module loses power due to shading, damage, cracks, or other reasons, the device described in this invention will lose power. Therefore, it is necessary to continuously detect whether the output voltage of the solar module is less than the second set value, and disconnect S2 and S3 in time when it is less than the second set value, so that the output voltage at both ends of the parasitic diode inside S2 or S3 can play a supporting role in preventing power loss.

[0087] In summary, this invention proposes a power supply management device and its control method, which solves the defect in the prior art where the solar module stops supplying power when it is bypassed, making it impossible to detect the working status of the solar module. When the solar module is bypassed, an emergency power supply process can be initiated, allowing the solar module to maintain power supply during and for a period after bypassing, ensuring no loss of system efficiency and maximizing efficiency. Furthermore, by detecting the voltage across the solar module at the moment of bypass, the status of the solar module can be diagnosed immediately. A method for controlling the implementation of the above functions is also provided, enabling fault diagnosis and detection of the working status after bypassing the solar module.

[0088] Those skilled in the art will recognize that, in conjunction with the embodiments described herein, they can employ different methods to achieve the described effects for each specific application; however, such implementations should not be considered beyond the scope of this invention. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of the described technical solutions. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

[0089] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist independently, or two or more units can be integrated into one unit.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power management device, characterized by comprising: The utility model relates to a kind of solar energy charging device, including: Power module, detection module 1, detection module 2, execution module, control module, bypass module, support module 1, support module 2 and auxiliary module; The power module is electrically connected with the detection module 1, the detection module 2, the execution module, the control module, the bypass module and the auxiliary module respectively; The detection module 1 is electrically connected with the detection module 2, the execution module and the control module respectively; The detection module 2 is electrically connected with the execution module, the control module and the bypass module respectively; The execution module is electrically connected with the control module, the bypass module, the support module 1, the support module 2 and the auxiliary module respectively; The control module is electrically connected with the support module 1, the support module 2 and the auxiliary module respectively; The bypass module is electrically connected with the support module 1, the support module 2 and the auxiliary module respectively; The support module 1 is electrically connected with the support module 2 and the auxiliary module respectively; The support module 2 is electrically connected with the support module 1 and the auxiliary module respectively; The power module includes: solar assembly P, bypass diode D0, flyback converter F and energy storage capacitor C1; The positive pole of the solar assembly P is electrically connected with the positive pole of the bypass diode D0, the primary side of the flyback converter F and one end of the energy storage capacitor C1 respectively; The negative pole of the solar assembly P is electrically connected with the negative pole of the bypass diode D0; The other end of the energy storage capacitor C1 is electrically connected with the primary side of the flyback converter F; The secondary side of the flyback converter F is electrically connected with the control module and the auxiliary module respectively; The detection module 1 is shunt R1; The input pole of the shunt R1 is electrically connected with the negative pole of the solar assembly P; The output pole of the shunt R1 is electrically connected with the primary side of the flyback converter F; The signal sampling pole of the shunt R1 is electrically connected with the control module; The detection module 2 is voltage divider M; One end of the voltage divider M is electrically connected with one end of the energy storage capacitor C1; The other end of the voltage divider M is electrically connected with the other end of the energy storage capacitor C1; The sampling pole of the voltage divider M is electrically connected with the control module; The execution module is switch tube S1; The drain of the switch tube S1 is electrically connected with the output pole of the shunt R1; The gate of the switch tube S1 is electrically connected with the control module; The source of the switch tube S1 is electrically connected with the support module 1; The control module includes: signal processor T, programmable element L and driving unit U; The programmable element L is electrically connected with the signal processor T and the driving unit U respectively; The signal processor T is electrically connected with the signal sampling pole of the shunt R1 and the sampling pole of voltage divider respectively; The driving unit U is electrically connected with the gate of the switch tube S1; The bypass module is bypass diode D1; The negative pole of the bypass diode D1 is electrically connected with one end of the voltage divider M and the positive pole of device output end respectively; The positive pole of the bypass diode D1 is electrically connected with the source of the switch tube S1. The support module 1 comprises a switch tube S2, a Zener diode Z1 and an energy storage capacitor C2; The source of the switch tube S2 is electrically connected with one end of the Zener diode Z1, one end of the energy storage capacitor C2 and the positive pole of the bypass diode D1 respectively; The drain of the switch tube S2 is electrically connected with the other end of the Zener diode Z1, the other end of the energy storage capacitor C2 and the negative pole of the device output terminal respectively; The gate of the switch tube S2 is electrically connected with the driving unit U; The bypass module 2 comprises a switch tube S3, a Zener diode Z2 and an energy storage capacitor C3; The source of the switch tube S3 is electrically connected with the positive pole of the bypass diode D1, one end of the Zener diode Z2 and one end of the energy storage capacitor C3 respectively; The drain of the switch tube S3 is electrically connected with the other end of the Zener diode Z2, the other end of the energy storage capacitor C3 and the drain of the switch tube S2 respectively; The gate of the switch tube S3 is electrically connected with the driving unit U; The auxiliary module is an auxiliary power supply V; The positive pole of the auxiliary power supply V is electrically connected with the drain of the switch tube S3; The negative pole of the auxiliary power supply V is electrically connected with the source of the switch tube S3; The output terminal of the auxiliary power supply V is electrically connected with the secondary side of the flyback converter F and the control module.

2. The control method of the power management device according to any one of claims 1, characterized in that, The control method comprises the following steps: H1: detecting the output voltage of the solar module P; H2: judging whether the output voltage of the solar module P is greater than or equal to a first set value; If not, closing the switch tube S1, opening the switch tube S2 and the switch tube S3, and returning to step H1; If yes, closing the switch tube S1, the switch tube S2 and the switch tube S3, and executing H3; H3: detecting the output voltage of the solar module P after the switch tube S1, the switch tube S2 and the switch tube S3 are closed; H4: judging whether the output voltage of the solar module P detected in H3 is less than a second set value; If not, returning to step H3; If yes, opening the switch tube S2 and the switch tube S3, and returning to step H1; Wherein, the first set value is greater than the second set value.

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