Charging device and charging method of solar cell panel

Abstract

The invention provides a solar cell panel charging device and a charging method. The charging device of the solar cell panel comprises the solar cell panel, a voltage regulation charging module, an energy storage battery, a current sampling module and a control module. The voltage adjusting charging module is used for adjusting the charging voltage of the solar cell panel. And the energy storage battery charges the solar cell panel based on the adjusted charging voltage. The current sampling module detects the charging current of the energy storage battery under different gear voltages in the multi-gear polling charging stage. And the control module determines a target charging gear voltage based on the maximum charging current sampled by the current sampling module in the multi-gear polling charging stage and controls the voltage regulation charging module to charge the energy storage battery by adopting the target charging gear voltage. Thus, through the scheme, under the condition that the conversion efficiency and the area of an existing solar cell panel are not changed, the charging efficiency of the solar cell panel can be improved, and the cost can be saved.

Description

Technical Field

[0001] The present application relates to the field of energy, and in particular to a charging device and a charging method for a solar panel. Background Art

[0002] The charging efficiency of solar panels, that is, their photoelectric conversion efficiency, is a key indicator to measure the performance of solar panels. At present, the charging efficiency of solar panels is generally low, with an efficiency of 60%-80% under different light intensities and temperatures, and there are pain points such as slow charging and short battery life.

[0003] There are two improvement measures in the market to solve this problem: one is to change the material of solar panels to improve conversion efficiency. Currently, solar panels are generally made of monocrystalline silicon, which has a higher conversion efficiency than polycrystalline silicon, but its maximum mass production efficiency is still less than 24%. Other materials, such as perovskite, can increase the efficiency to more than 30%, but they are still in the laboratory and have not yet been mass-produced, and the cost is relatively high.

[0004] Another method is to increase the area of ​​solar panels to improve the output efficiency of solar panels. This method not only increases costs, but many solar products cannot be increased in area due to regulations and structural limitations. Summary of the invention

[0005] In order to overcome the technical problems mentioned in the above technical background, an embodiment of the present application provides a charging device for a solar panel, and the charging device for a solar panel includes:

[0006] Solar panels;

[0007] A voltage regulating charging module, connected to the solar panel, and used for regulating the charging voltage of the solar panel;

[0008] An energy storage battery is connected to the voltage regulating charging module, and the solar panel is charged based on the regulated charging voltage;

[0009] A current sampling module is connected between the voltage regulating charging module and the energy storage battery, wherein the charging cycle includes a multi-gear polling charging stage and a gear confirmation charging stage, the duration of the multi-gear polling charging stage is shorter than the duration of the gear confirmation charging stage, and the current sampling module is used to detect the charging current of the energy storage battery under different gear voltages during the multi-gear polling charging stage;

[0010] A control module is connected to the current sampling module and the voltage regulation charging module, and is used to determine the target charging gear voltage based on the maximum charging current sampled by the current sampling module in the multi-gear polling charging stage. The control module is also used to control the voltage regulation charging module to charge the energy storage battery using the target charging gear voltage in the gear confirmation charging stage.

[0011] In a possible implementation, the solar panel charging device further includes:

[0012] A gear voltage adjustment module is connected to the control module and the voltage regulation charging module. The gear voltage adjustment module is used to control the voltage regulation charging module to provide the energy storage battery with charging voltages of different gears in the multi-gear polling charging stage based on the control instructions of the control module, and is used to control the voltage regulation charging module to provide the energy storage battery with the charging voltage of the target charging gear voltage in the gear confirmation charging stage based on the control instructions of the control module.

[0013] In a possible implementation, the gear voltage adjustment module includes a voltage dividing unit and a multi-channel adjustment unit;

[0014] The voltage dividing unit includes at least one resistor series branch, one end of the resistor series branch is grounded, the other end of the resistor series branch is connected to the input end of the voltage regulating and charging module, and the voltage dividing node between two adjacent resistors in the resistor series branch is connected to the excitation voltage pin of the voltage regulating and charging module, and the excitation voltage pin provides a stable voltage signal;

[0015] The multiple adjustment units are connected in parallel to the voltage dividing node, and the multiple adjustment units are used to adjust the resistors connected to the resistor series branches to change the input voltage input to the input end of the voltage regulating charging module.

[0016] In one possible implementation, the adjustment unit includes a transistor, a first resistor, a second resistor, a third resistor and a fourth resistor, the first electrode of the transistor is grounded, the control electrode of the transistor is connected to the control module through the first resistor, the second resistor is connected between the first electrode of the transistor and the control electrode of the transistor, the second electrode of the transistor is connected to one end of the third resistor, the other end of the third resistor is connected to the voltage dividing node, and the fourth resistor is connected in parallel with the third resistor.

[0017] In a possible implementation, the voltage dividing unit includes two resistor series branches, each resistor series branch includes two resistors, and the voltage dividing node is located between the two resistors in the resistor series branch.

[0018] In a possible implementation, the voltage regulating charging module further includes a charging output terminal, and the charging output terminal is connected to the energy storage battery;

[0019] The voltage regulating charging module is used to adjust the charging voltage output by the charging output terminal based on the input voltage change of the input terminal.

[0020] In a possible implementation, the positive electrode of the energy storage battery is connected to the charging output terminal, and the negative electrode of the energy storage battery is grounded;

[0021] The current sampling module is connected to the negative electrode of the energy storage battery and is used to collect the charging current of the energy storage battery.

[0022] In a possible implementation, the current sampling module includes a fifth resistor, a sixth resistor and a first capacitor, one end of the fifth resistor is connected to the negative electrode of the energy storage battery, the other end of the fifth resistor is connected to the sixth resistor and then grounded, the first capacitor is connected in parallel with the sixth resistor, and the control module is connected between the fifth resistor and the sixth resistor.

[0023] Another object of the present application is to provide a method for charging a solar panel, the method being applied to a plurality of charging devices for the solar panels provided in the present application, the method comprising:

[0024] In the multi-gear polling charging stage, the energy storage battery is charged using gear voltages of multiple different gears, and the charging current of the energy storage battery under multiple different gear voltages is collected;

[0025] Comparing the charging currents of the energy storage battery at a plurality of different gear voltages, and selecting the gear voltage corresponding to the maximum charging current as the target charging gear voltage;

[0026] In the charging stage of confirming the gear, the energy storage battery is charged using the target charging gear voltage.

[0027] In a possible implementation, before charging the energy storage battery, the method further includes:

[0028] Pre-configuring a plurality of different gear voltages used in the multi-gear polling charging phase corresponding to different types of solar cell panels;

[0029] In the multi-gear polling charging stage, before the step of charging the energy storage battery with gear voltages of multiple different gears and collecting the charging current of the energy storage battery under multiple different gear voltages, the method further includes:

[0030] The model of the solar panel is detected, and based on the model of the solar panel, a plurality of different gear voltages used by the solar panel in the multi-gear polling charging stage are determined.

[0031] Based on any of the above aspects, the embodiments of the present application provide a solar panel charging device and charging method. Thus, through the above scheme, the charging efficiency of the solar panel is improved while the conversion efficiency and area of ​​the existing solar panel remain unchanged, and the additional cost caused by changing the material of the solar panel or increasing the area can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 One of the structural block diagrams of a solar panel charging device provided in this embodiment;

[0034] Figure 2 The second structural block diagram of a solar panel charging device provided in this embodiment;

[0035] Figure 3 A partial circuit diagram of a solar panel charging device provided in this embodiment;

[0036] Figure 4 A schematic diagram of the steps of a solar panel charging method provided in this embodiment.

[0037] Icons: 1-solar panel charging device, 10-solar panel, 20-voltage regulating charging module, 30-energy storage battery, 40-current sampling module, 50-control module, 60-gear voltage adjustment module, 600-voltage dividing unit, 6001-series resistance branch, 610-adjustment unit, Q3-transistor, R16-first resistor, R14-second resistor, R11-third resistor, R11A-fourth resistor, R23-fifth resistor, R48-sixth resistor, C50-first capacitor. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of this application, it should be noted that the terms "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] It should be noted that, in the absence of conflict, different features in the embodiments of the present application may be combined with each other.

[0043] In order to solve the technical problems mentioned in the aforementioned background technology, the inventor innovatively designed the following technical solution, and the specific implementation solution of the present application will be described in detail below with reference to the accompanying drawings.

[0044] See also Figure 1 , Figure 1 The partial structural block diagram of a solar panel charging device 1 provided in this embodiment includes: a solar panel 10, a voltage regulating charging module 20, an energy storage battery 30, a current sampling module 40 and a control module 50.

[0045] The voltage regulating charging module 20 is connected to the solar panel 10, and is used to adjust the charging voltage of the solar panel 10. The energy storage battery 30 is connected to the voltage regulating charging module 20, and the solar panel 10 is charged based on the adjusted charging voltage. The current sampling module 40 is connected between the voltage regulating charging module 20 and the energy storage battery 30, wherein the charging cycle includes a multi-gear polling stage and a gear confirmation charging stage, and the duration of the multi-gear polling charging stage is less than the duration of the gear confirmation charging stage. Exemplarily, the duration of the multi-gear polling charging stage can be 10 seconds, and the duration of the gear confirmation charging stage can be 10 minutes. The current sampling module 40 is used to detect the charging current of the energy storage battery 30 under different gear voltages in the multi-gear polling charging stage.

[0046] The control module 50 is connected to the current sampling module 40 and the voltage regulating charging module 20, and is used to determine the target charging gear voltage based on the maximum charging current sampled by the current sampling module 40 in the multi-gear polling charging stage. The control module 50 is also used to control the voltage regulating charging module 20 to charge the energy storage battery 30 using the target charging gear voltage in the gear confirmation charging stage.

[0047] In this embodiment, the charging device 1 of the solar panel charges the energy storage battery 30 in two stages. In the multi-gear polling charging stage, the voltage regulating charging module 20 adjusts the charging voltage of multiple gears, and the energy storage battery 30 is charged based on the adjusted charging voltage of multiple gears. The purpose of this stage is to collect the charging current of the energy storage battery 30 under the charging voltage of multiple gears, and the current sampling module 40 collects and inputs it into the control module 50. The control module 50 selects the maximum charging current to determine the target charging gear voltage, and then enters the gear confirmation charging stage.

[0048] In the charging stage of confirming the gear, the control module 50 controls the voltage regulating charging module 20 to adjust to the target charging gear voltage, and the voltage regulating charging module 20 uses the target charging gear voltage to charge the energy storage battery 30. The purpose of this stage is to make the charging efficiency of the solar panel 10 for the energy storage battery 30 close to the maximum power point, so as to achieve the tracking of the maximum power point of the solar panel 10.

[0049] For further information, see Figure 2 , Figure 2 The structure block diagram of a solar panel charging device 1 provided in this embodiment. The solar panel charging device 1 further includes a gear voltage adjustment module 60 .

[0050] The gear voltage adjustment module 60 is respectively connected to the control module 50 and the voltage regulation charging module 20. The gear voltage adjustment charging module 20 is used to control the voltage regulation charging module 20 to provide the energy storage battery 30 with charging voltages of different gears in the multi-gear polling charging stage based on the control instructions of the control module 50, and is used to control the voltage regulation charging module 20 to provide the energy storage battery 30 with a charging voltage of the target charging gear voltage in the gear confirmation charging stage based on the control instructions of the control module 50.

[0051] In this embodiment, according to the characteristics of different solar panels 10, a constant voltage method is used to track the maximum power point of the solar panel 10, so as to maximize the output power of the solar panel 10. The specific process is as follows.

[0052] First, in the multi-gear polling charging stage, the charging voltages of multiple gears input to the energy storage battery 30 are controlled by the gear voltage adjustment module 60 and the voltage regulation charging module 20, and the charging voltage of each gear is kept unchanged.

[0053] Next, the control module 50 compares the charging currents of the energy storage battery 30 at the charging voltages of the multiple gears collected by the current sampling module 40, and determines the target gear charging voltage corresponding to the maximum charging current.

[0054] Finally, the gear confirmation charging stage is entered, and the control module 50 uses the target gear charging voltage to charge the energy storage battery 30 through the gear voltage adjustment module 60 and the voltage regulation charging module 20. At this time, the charging efficiency of the solar panel 10 for the energy storage battery 30 is close to the maximum power point, thereby realizing the tracking of the maximum power point of the solar panel 10.

[0055] It is worth noting that the control module 50 can control the gear voltage adjustment module 60 through wireless communication, which can be a smart Bluetooth module for example. In the multi-gear polling charging stage, the control module 50 adjusts the gear voltage of the solar panel 10 to charge the energy storage battery 30 through the gear voltage adjustment module 60 and the voltage regulation charging module 20. In this embodiment, the type of device used by the control module 50 is not specifically limited here and can be selected according to actual conditions.

[0056] For further information, see Figure 3 , Figure 3 The partial circuit diagram of a solar panel charging device 1 provided in this embodiment. The gear voltage adjustment module 60 includes a voltage dividing unit 600 and an adjustment unit 610 .

[0057] The voltage divider unit 600 includes at least one resistor series branch 6001, one end of the circuit series branch 6001 is grounded, and the other end (the DC_VCC end in the voltage divider unit 600 in the figure) is connected to the input end VIN of the voltage regulating charging module 20, and the voltage dividing node (for example, the voltage dividing node A between the resistor R8 and the resistor R13A in the resistor series branch 6001 in the figure) between two adjacent resistors in the resistor series branch 6001 (for example, the resistor R8 and the resistor R13A in the resistor series branch 6001 in the figure) is connected to the excitation voltage pin VSEN of the voltage regulating charging module 20, and the excitation voltage pin VSEN provides a stable voltage signal.

[0058] After being connected in parallel, the multi-channel adjustment unit 610 is connected to the voltage dividing node (for example, the voltage dividing node A between the resistor R8 and the resistor R13A in the resistor series branch 6001 in the figure), and the adjustment unit 610 is used to adjust the resistance in the resistor series branch 6001 to change the input voltage input to the input terminal VIN of the voltage regulating charging module 20. In this embodiment, an adjustment unit 610 has two states of disconnection and conduction. The combination of the above states by different numbers of adjustment units 610 can change the resistance in the resistor series branch 6001, so that the adjustment of multiple gear voltages can be achieved. The number of adjustment units 610 can be set according to the number of gear voltages to be adjusted. For example, when the number of gear voltages to be adjusted is 4, at least two adjustment units 610 can be used to achieve it.

[0059] In this embodiment, the voltage regulating charging module 20 can be a charging chip with maximum power point tracking (MPPT) technology, such as IU5987T. MPPT technology is a key technology in solar photovoltaic systems, which can monitor the output of solar panels in real time and adjust their working status to ensure that the solar panels always operate at the maximum output power point.

[0060] The input end of the voltage regulating charging module 20 is the VIN pin of the charging chip, and the VIN pin is used for input voltage. The excitation voltage pin is the VSEN pin of the charging chip, and the VSEN pin voltage can be maintained at a constant voltage (for example, 1V), and the input voltage DC_VCC input to the input end of the voltage regulating charging module 20 is changed by adjusting the resistance value of the resistor in the voltage dividing unit 600 (by changing the resistance value of the adjustment unit 610 connected in parallel to the voltage dividing unit 600).

[0061] Further, please see again Figure 3 The adjustment unit 610 includes a transistor Q3, a first resistor R16, a second resistor R14, a third resistor R11 and a fourth resistor R11A.

[0062] The first electrode of the transistor Q3 is grounded, the control electrode of the transistor Q3 is connected to the control module 50 (not shown in the figure) through the first resistor R16, and the second resistor R14 is connected between the first electrode of the transistor Q3 and the control electrode of the transistor Q3. The second electrode of the transistor Q3 is connected to one end of the third resistor R11, and the other end of the third resistor R11 is connected to a voltage dividing node (for example, the voltage dividing node A between the resistor R8 and the resistor R13A in the resistor series branch 6001 in the figure), and the fourth resistor R11A is connected in parallel with the third resistor R11.

[0063] In this embodiment, the adjustment unit 610 controls the on / off state of the transistor Q3 through the control electrode of the transistor Q3 to change the resistance of the adjustment unit 610 , thereby changing the input voltage.

[0064] It is worth noting that the specific resistance values ​​of the first resistor R16 , the second resistor R14 , the third resistor R11 and the fourth resistor R11A are not specifically limited here, but the resistance values ​​need to be set according to actual conditions.

[0065] like Figure 3 As shown, the figure shows a schematic diagram of three groups of adjustment units 610, and the other two groups of adjustment units 610 have the same structure as the adjustment units 610 described above, which will not be described again.

[0066] Further, please see again Figure 3 The voltage dividing unit 600 includes two resistor series branches 6001, each resistor series branch 6001 includes two resistors (for example, resistor R8 and resistor R13A or resistor R7 and resistor R13 in the figure), and the voltage dividing node (for example, voltage dividing node A between resistor R8 and resistor R13A or voltage dividing node B between resistor R7 and resistor R13 in the figure) is located between the two resistors of the resistor series branch 6001.

[0067] In this embodiment, the specific resistance values ​​of the two resistors in the resistor series branch 6001 are not specifically limited here, but the resistance values ​​need to be set according to actual conditions.

[0068] Further, please see again Figure 3 The voltage regulating charging module 20 also includes a charging output terminal BAT, and the charging output terminal BAT is connected to the energy storage battery 30.

[0069] The voltage regulating charging module 20 is used to adjust the charging voltage output by the charging output terminal BAT based on the input voltage change of the input terminal VIN.

[0070] In this embodiment, the voltage regulating charging module 20 may be a charging chip using MPPT technology, such as IU5987T. The charging output terminal of the voltage regulating charging module 20 is the BAT pin of the charging chip, and the BAT pin is used to connect to the energy storage battery.

[0071] Further, please see again Figure 3 The positive electrode of the energy storage battery 30 (the end of the energy storage battery 30 labeled 2 in P2 in the figure) is connected to the charging output terminal BAT, and the negative electrode of the energy storage battery 30 (the end of the energy storage battery 30 labeled 1 in P2 in the figure) is grounded; the current sampling module 40 is connected to the negative electrode of the energy storage battery 30 for collecting the charging current of the energy storage battery 30.

[0072] In this example, please combine Figure 2 The positive electrode of the energy storage battery 30 receives the charging voltage of different gears input by the voltage regulating charging module 20 for charging, and the current sampling module 40 collects the charging current under different gears and inputs it into the control module 50.

[0073] Further, please see again Figure 3 The current sampling module 40 includes a fifth resistor R23, a sixth resistor R48 and a first capacitor C50. One end of the fifth resistor R23 is connected to the negative electrode of the energy storage battery 30, and the other end of the fifth resistor R23 is connected to the sixth resistor R48 and then grounded. The first capacitor C50 is connected in parallel with the sixth resistor R48. The control module 50 (not shown in the figure) is connected between the fifth resistor R23 and the sixth resistor R48.

[0074] In this embodiment, the resistance values ​​of the fifth resistor R23 and the sixth resistor R48 and the capacitance value of the first capacitor C50 are not specifically limited here, but the resistance value or the capacitance value needs to be selected according to actual conditions.

[0075] It is worth noting that in this embodiment, only the connection mode and function of the VIN, VSEN, and BAT pins are explained in the voltage regulation charging module 20. Figure 3 The connection method of other pins (such as NTC, STAT, etc.) is not specifically limited here. Figure 2 The connection method and function of the resistors (such as R5, R10, etc.), capacitors (such as C2, C3) and inductors (such as L1) connected to other pins are not specifically limited here. It can be understood that the configuration of the above pins belongs to the normal configuration of the chip for normal operation and will not be described one by one here.

[0076] Based on the same concept, the present application also provides a method for charging a solar panel, which is applied to the above-mentioned solar panel charging device 1, see Figure 4 , Figure 4 A step diagram of a solar panel charging method provided in this embodiment, the method comprises the following steps:

[0077] Step S110, in the multi-gear polling charging stage, the energy storage battery is charged using gear voltages of multiple different gears, and the charging current of the energy storage battery under multiple different gear voltages is collected;

[0078] In this step, first, the gear voltage adjustment module controls the voltage regulation charging module to provide a plurality of charging voltages of different gears for the energy storage battery based on the control instruction of the control module.

[0079] Next, the energy storage battery is charged based on the charging voltages at multiple different gears, and at the same time, the current sampling module collects the charging current of the energy storage battery at multiple different gears and inputs it into the control module.

[0080] Step S120, comparing the charging currents of the energy storage battery at a plurality of different gear voltages, and selecting the gear voltage corresponding to the maximum charging current as the target charging gear voltage;

[0081] In this step, first, the control module receives the charging current collected by the current sampling module, compares the charging currents under a plurality of different gear voltages, and selects the gear voltage corresponding to the maximum charging current as the target charging gear voltage.

[0082] Next, the control module inputs a control instruction to the gear adjustment module, and the control instruction indicates that the voltage regulation charging module uses the target charging gear voltage to charge the energy storage battery.

[0083] Step S130, in the charging stage of confirming the gear, charging the energy storage battery with the target charging gear voltage.

[0084] In this step, the gear voltage adjustment module controls the voltage regulation charging module to provide the target charging gear voltage for the energy storage battery based on the control instruction of the control module.

[0085] Furthermore, before the energy storage battery is charged, the method further includes:

[0086] Pre-configure multiple different gear voltages used in the multi-gear polling charging stage corresponding to different types of solar panels;

[0087] In this embodiment, according to different models of solar panels, different gear voltages are used in the multi-gear polling charging stage.

[0088] It is worth noting that the multiple different gear voltages are not selected randomly. It is necessary to draw a curve of light intensity and temperature based on the experimental data obtained from a large number of tests on the same type of solar panels under different light intensities and temperatures, and select the optimal multiple voltages.

[0089] Before step S110, the method further includes:

[0090] The model of the solar panel is detected, and based on the model of the solar panel, a plurality of different gear voltages used by the solar panel in the multi-gear polling charging stage are determined.

[0091] In this embodiment, after step S130, after a certain preset time, the charging device of the solar panel re-enters the multi-speed polling charging stage. Exemplarily, the preset time may be 10 minutes.

[0092] In this way, no matter how the temperature and light intensity around the solar panel change, the charging power of the solar panel under the current environment can still be close to the maximum power point, thus improving the charging efficiency of the solar panel.

[0093] In summary, the present application provides a solar panel charging device and a charging method. The solar panel charging device includes: a solar panel, a voltage regulating charging module, an energy storage battery, a current sampling module and a control module. The voltage regulating charging module is used to adjust the charging voltage of the solar panel. The energy storage battery charges the solar panel based on the adjusted charging voltage. The current sampling module detects the charging current of the energy storage battery under different gear voltages in the multi-gear polling charging stage. The control module determines the target charging gear voltage based on the maximum charging current sampled by the current sampling module in the multi-gear polling charging stage and controls the voltage regulating charging module to charge the energy storage battery with the target charging gear voltage. In this way, through the above scheme, the power utilization rate of the solar panel is improved while the conversion efficiency and area of ​​the existing solar panel remain unchanged, and the additional cost caused by changing the material of the solar panel or increasing the area can be saved.

[0094] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A solar panel charging device, characterized in that: The charging device of the solar panel comprises: Solar panels; A voltage regulating charging module, connected to the solar panel, and used for regulating the charging voltage of the solar panel; An energy storage battery is connected to the voltage regulating charging module, and the solar panel is charged based on the regulated charging voltage; A current sampling module is connected between the voltage regulating charging module and the energy storage battery, wherein the charging cycle includes a multi-gear polling charging stage and a gear confirmation charging stage, the duration of the multi-gear polling charging stage is shorter than the duration of the gear confirmation charging stage, and the current sampling module is used to detect the charging current of the energy storage battery under different gear voltages during the multi-gear polling charging stage; A control module is connected to the current sampling module and the voltage regulation charging module, and is used to determine the target charging gear voltage based on the maximum charging current sampled by the current sampling module in the multi-gear polling charging stage. The control module is also used to control the voltage regulation charging module to charge the energy storage battery using the target charging gear voltage in the gear confirmation charging stage.

2. The solar panel charging device according to claim 1, characterized in that: The charging device of the solar panel also includes: A gear voltage adjustment module is connected to the control module and the voltage regulation charging module. The gear voltage adjustment module is used to control the voltage regulation charging module to provide the energy storage battery with charging voltages of different gears in the multi-gear polling charging stage based on the control instructions of the control module, and is used to control the voltage regulation charging module to provide the energy storage battery with the charging voltage of the target charging gear voltage in the gear confirmation charging stage based on the control instructions of the control module.

3. The solar panel charging device according to claim 2, characterized in that: The gear voltage adjustment module includes a voltage dividing unit and a multi-channel adjustment unit; The voltage dividing unit includes at least one resistor series branch, one end of the resistor series branch is grounded, the other end of the resistor series branch is connected to the input end of the voltage regulating and charging module, and the voltage dividing node between two adjacent resistors in the resistor series branch is connected to the excitation voltage pin of the voltage regulating and charging module, and the excitation voltage pin provides a stable voltage signal; The multiple adjustment units are connected in parallel to the voltage dividing node, and the multiple adjustment units are used to adjust the resistors connected to the resistor series branches to change the input voltage input to the input end of the voltage regulating charging module.

4. The solar panel charging device according to claim 3, characterized in that: The adjustment unit includes a transistor, a first resistor, a second resistor, a third resistor and a fourth resistor. The first electrode of the transistor is grounded, the control electrode of the transistor is connected to the control module through the first resistor, the second resistor is connected between the first electrode of the transistor and the control electrode of the transistor, the second electrode of the transistor is connected to one end of the third resistor, the other end of the third resistor is connected to the voltage dividing node, and the fourth resistor is connected in parallel with the third resistor.

5. The solar panel charging device according to claim 3, characterized in that: The voltage dividing unit includes two resistor series branches, each resistor series branch includes two resistors, and the voltage dividing node is located between the two resistors in the resistor series branch.

6. The solar panel charging device as claimed in claim 3, characterized in that: The voltage regulating charging module also includes a charging output terminal, and the charging output terminal is connected to the energy storage battery; The voltage regulating charging module is used to adjust the charging voltage output by the charging output terminal based on the input voltage change of the input terminal.

7. The solar panel charging device according to claim 6, characterized in that: The positive electrode of the energy storage battery is connected to the charging output terminal, and the negative electrode of the energy storage battery is grounded; The current sampling module is connected to the negative electrode of the energy storage battery and is used to collect the charging current of the energy storage battery.

8. The solar panel charging device according to claim 7, characterized in that: The current sampling module includes a fifth resistor, a sixth resistor and a first capacitor, one end of the fifth resistor is connected to the negative electrode of the energy storage battery, the other end of the fifth resistor is connected to the sixth resistor and then grounded, the first capacitor is connected in parallel with the sixth resistor, and the control module is connected between the fifth resistor and the sixth resistor.

9. A method for charging a solar panel, characterized in that: The charging device for the solar panel according to any one of claims 1 to 8, wherein the method comprises: In the multi-gear polling charging stage, the energy storage battery is charged using gear voltages of multiple different gears, and the charging current of the energy storage battery under multiple different gear voltages is collected; Comparing the charging currents of the energy storage battery at a plurality of different gear voltages, and selecting the gear voltage corresponding to the maximum charging current as the target charging gear voltage; In the charging stage of confirming the gear, the energy storage battery is charged using the target charging gear voltage.

10. The method for charging a solar panel according to claim 9, characterized in that: Before charging the energy storage battery, the method further includes: Pre-configuring a plurality of different gear voltages used in the multi-gear polling charging phase corresponding to different types of solar cell panels; In the multi-gear polling charging stage, before the step of charging the energy storage battery with gear voltages of multiple different gears and collecting the charging current of the energy storage battery under multiple different gear voltages, the method further includes: The model of the solar panel is detected, and based on the model of the solar panel, a plurality of different gear voltages used by the solar panel in the multi-gear polling charging stage are determined.

Images