Dual power supply system based on photovoltaic solar energy

Abstract

The invention relates to the technical field of power supply, in particular to a dual power supply system based on photovoltaic solar energy, which mainly comprises a photovoltaic solar energy device used for providing solar energy voltage; the PD adapter is used for providing electric power based on the USB Type-C PD standard; the control module is used for identifying the power supply capability of the PD adapter and carrying out power supply switching and protection according to the power supply capability and the solar voltage; and the power receiving unit is used for receiving and distributing power from the photovoltaic solar device or the PD adapter. According to the system, two modes of USB Type-C PD adapter power supply and photovoltaic solar power supply can be combined, so that small electrical equipment can flexibly select power supply modes in different environments. When illumination is sufficient, solar energy is preferentially used for power supply, green and energy saving are achieved, when illumination is insufficient or illumination does not exist, power supply is automatically switched to a PD adapter, and normal operation of equipment is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of power supply, and in particular, to a dual power supply system based on photovoltaic solar energy. Background Art

[0002] In the prior art, for the power supply of small electrical appliances (within 100W), it is usually powered by a single Type-C PD adapter, or by solar energy + battery alone.

[0003] Although the power supply using a Type-C PD adapter is stable, the energy consumption is relatively high. While the pure solar power supply method is energy-saving and environmentally friendly, the usage time of the device is limited by the lighting conditions, and when there is no light or insufficient light, it needs to rely on the battery for energy storage and power supply. However, the cost of the battery is high, and for small devices, its cost performance is relatively low, increasing the economic burden on users.

[0004] Therefore, how to ensure power supply stability while reducing energy consumption and making full use of renewable energy has become an urgent technical problem in the field of power supply technology for small electrical appliances. Summary of the Invention

[0005] This application provides a dual power supply system based on photovoltaic solar energy, which can ensure power supply stability while reducing energy consumption, making full use of renewable energy, and reducing the economic cost during the power supply of small devices.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a dual power supply system based on photovoltaic solar energy, including:

[0008] A photovoltaic solar energy device for providing a solar voltage;

[0009] A PD adapter for providing power based on the USB Type-C PD standard;

[0010] A control module for identifying the power supply capacity of the PD adapter and performing power supply switching and protection according to the power supply capacity and the solar voltage;

[0011] A power receiving unit for receiving and distributing the power from the photovoltaic solar energy device or the PD adapter.

[0012] In a preferred example of this application, it can be further set that the control module includes:

[0013] A PD microcontroller unit is used to communicate with the PD adapter via the USB Type-C PD standard, obtain the power supply capacity data of the PD adapter, and determine whether the power supply power of the PD adapter reaches a preset threshold based on the power supply capacity data;

[0014] A voltage comparator is used to compare the solar voltage with the PD voltage and cut off or restore the power supply at the PD end based on the comparison result;

[0015] An LED indicator is used to provide power supply status and alarm indication.

[0016] In a preferred example of the present application, it can be further set that when the power supply capacity of the PD adapter is insufficient, the PD microcontroller unit provides an alarm by flashing the LED indicator and does not output the PD voltage.

[0017] In a preferred example of the present application, it can be further set to include:

[0018] When the solar voltage is higher than the set value, the voltage comparator cuts off the PD power supply and provides an alarm by flashing the LED indicator;

[0019] When the solar voltage is lower than the set value, the PD microcontroller unit restores the power supply of the PD adapter and turns off the LED indicator.

[0020] In a preferred example of the present application, it can be further set that the control module further includes:

[0021] An adapter capability detection module is used to ensure that the voltage and current of the PD adapter meet the requirements of the power receiving device during the PD protocol voltage negotiation between the PD adapter and the control module. For adapters that do not meet the requirements, no voltage is output.

[0022] In a preferred example of the present application, it can be further set that the standard operating voltage of the photovoltaic solar device is 20V and the open-circuit voltage is 24V.

[0023] In a preferred example of the present application, it can be further set that the control module further includes:

[0024] A fast shutdown unit is used to prevent the solar voltage from flowing back to the PD adapter and the devices connected thereto.

[0025] In a preferred example of the present application, it can be further set that the control module further includes:

[0026] An over-temperature protection unit is used to automatically cut off the power supply of the photovoltaic solar device and the PD adapter when the temperature of the system exceeds the set threshold.

[0027] In a preferred example of the present application, it can be further set that the LED indicator includes LED indicators of multiple different colors.

[0028] In a preferred example of the present application, it can be further set that it further includes:

[0029] A voice reminder unit for sending out a voice prompt when the power supply is switched.

[0030] In summary, compared with the prior art, the beneficial effects brought by the technical solution provided by the embodiment of the present application at least include:

[0031] The dual power supply system based on photovoltaic solar energy provided by the present application combines two power supply modes: USB Type-C PD adapter power supply and photovoltaic solar energy power supply, enabling small electrical equipment to flexibly select the power supply method in different environments. When the light is sufficient, solar power supply is preferentially used to achieve green energy conservation. When the light is insufficient or there is no light, it automatically switches to PD adapter power supply to ensure the normal operation of the equipment. Moreover, through the control module, the power supply capabilities of the PD adapter / car charger can be intelligently identified, and no voltage is output to the power supply equipment that does not meet the power requirements, effectively avoiding equipment damage or safety hazards caused by power supply mismatch. In addition, this system can automatically select the optimal power supply method according to the real-time changes of the solar voltage and the power supply capabilities of the PD adapter, without manual operation by the user, improving the convenience of the user during charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a module diagram of a dual power supply system based on photovoltaic solar energy provided by an embodiment of the present application.

[0033] Figure 2 It is a model diagram of a dual power supply system based on photovoltaic solar energy provided by an embodiment of the present application.

[0034] Figure 3 It is an internal connection diagram of the control module of a dual power supply system based on photovoltaic solar energy provided by an embodiment of the present application.

[0035] Figure 4 It is a voltage negotiation process diagram of the control module of a dual power supply system based on photovoltaic solar energy provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0037] In an embodiment of the present application, a dual power supply system based on photovoltaic solar energy is provided. Refer to Figure 1 as shown, including:

[0038] A photovoltaic solar energy device 100 for providing a solar voltage;

[0039] A PD adapter 200 for providing power based on the USB Type-C PD standard;

[0040] A control module 300 for identifying the power supply capacity of the PD adapter and performing power supply switching and protection according to the power supply capacity and the solar voltage;

[0041] A power receiving unit 400 for receiving and distributing the power from the photovoltaic solar energy device or the PD adapter.

[0042] Specifically, the USB TYPE-C PD standard is EN / IEC 62680-1-3:2022, EN / IEC 62680-1-2:2022. The control module may include PD voltage spoofing, detection control protection unit, and status indication.

[0043] As Figure 2 shown, taking a model of this system as an example to illustrate the connection relationship of each module, the photovoltaic solar energy device is connected to the power receiving device, the PD adapter or the car charger is connected to the control module ( Figure 2 label 3 in), and the control module is connected to the power receiving unit ( Figure 3 the module including the power receiving device in). The PD adapter and the photovoltaic solar energy device provide power and deliver the power to the power receiving unit in the direction of the arrow in the figure. The control module is used for detecting, indicating, identifying, and switching the circuit.

[0044] Further, the control module includes:

[0045] A PD microcontroller unit for communicating with the PD adapter through the USB Type-C PD standard, obtaining the power supply capacity data of the PD adapter, and judging whether the power supply power of the PD adapter reaches a preset threshold based on the power supply capacity data;

[0046] A voltage comparator is used to compare the solar voltage with the PD voltage and cut off or restore the power supply to the PD terminal based on the comparison result;

[0047] An LED indicator is used to provide power supply status and alarm indication.

[0048] Further, when the power supply capacity of the PD adapter is insufficient, the PD microcontroller unit provides an alarm by flashing the LED indicator and does not output the PD voltage.

[0049] Further, it includes:

[0050] When the solar voltage is higher than the set value, the voltage comparator cuts off the PD power supply and provides an alarm by flashing the LED indicator;

[0051] When the solar voltage is lower than the set value, the PD microcontroller unit restores the power supply of the PD adapter and turns off the LED indicator.

[0052] During specific implementation, the internal connection of the control module is as Figure 3 shown. The operating principle includes: The PD MCU communicates with the PD charger / car charger through the USB TYPE-C PD standard to obtain the power capabilities it broadcasts, namely SOURCE CAPABILITIES. The PD MCU analyzes the SOURCE CAPABILITIES. If the power supply capacity is sufficient, the PD power switch is not turned on, and at the same time, an alarm is provided by flashing the indicating LED; if the power supply capacity is sufficient, the PD power switch is turned on and outputs normally. The PD MCU monitors the output current in real time through the current ADC. When the current exceeds the set value, the PD power switch is turned off and the LED alarms by flashing. When the solar input exists simultaneously, and through the voltage comparator, when the solar voltage is higher than the set value, the PD power switch is directly turned off and the LED alarms by flashing; at the same time, the PD MCU monitors the solar input voltage through the voltage ADC. When the voltage is lower than the set value, the PD power switch is restored to be turned on and the alarm LED is removed.

[0053] In this embodiment, two power supply modes of USB Type-C PD adapter power supply and photovoltaic solar power supply are combined, enabling small electrical devices to flexibly select power supply methods in different environments. When there is sufficient light, solar power supply is preferentially used to achieve green energy conservation. When the light is insufficient or there is no light, it automatically switches to PD adapter power supply to ensure the normal operation of the device. Moreover, through the control module, the power supply capabilities of PD adapters / car chargers can be intelligently identified, and no voltage is output to power supply devices that do not meet the power requirements, effectively avoiding device damage or safety hazards caused by power supply mismatch. In addition, this system can automatically select the optimal power supply method according to the real-time changes in solar voltage and PD adapter power supply capabilities, without manual operation by the user, improving the convenience of user charging.

[0054] In some embodiments, the control module further includes:

[0055] The adapter capability detection module is used to ensure that the voltage and current of the PD adapter meet the requirements of the power receiving device during the PD protocol voltage negotiation between the PD adapter and the control module, and no voltage is output for adapters that do not meet the requirements.

[0056] Specifically, as Figure 4 shown, during the PD protocol voltage negotiation between the PD adapter and the control module, a step of adapter detection is added to ensure that the voltage and current of the PD adapter meet the requirements of the power receiving device, and no voltage is output for adapters that do not meet the requirements.

[0057] In this embodiment, device damage caused by power supply mismatch is avoided.

[0058] In some embodiments, the standard working voltage of the photovoltaic solar device is 20V and the open-circuit voltage is 24V.

[0059] In some embodiments, the control module further includes:

[0060] The fast shutdown unit is used to prevent the solar voltage from flowing back to the PD adapter and the devices connected thereto.

[0061] In some embodiments, the control module further includes:

[0062] The over-temperature protection unit is used to automatically cut off the power supply of the photovoltaic solar device and the PD adapter when the temperature of the system exceeds the set threshold.

[0063] In some embodiments, the LED indicator includes a variety of LED indicators of different colors.

[0064] In this embodiment, the LED indicator includes LED indicators of multiple different colors, which are used to provide indications of different states. For example, the green LED indicator indicates that the system is operating normally, and the red LED indicator indicates insufficient power supply or an alarm.

[0065] In some embodiments, it further includes:

[0066] A voice reminder unit, which is used to issue a voice prompt during power supply switching.

[0067] In this embodiment, the user can understand the power supply state of the system through both auditory and visual means, improving the usability of the system and the user experience.

[0068] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification. The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A dual power supply system based on photovoltaic solar energy, characterized in that: include: Photovoltaic solar devices for providing solar voltage; PD adapter, used to provide power based on the USB Type-C PD standard; A control module, used to identify the power supply capacity of the PD adapter and perform power supply switching and protection according to the power supply capacity and solar voltage; The power receiving unit is used to receive and distribute power from the photovoltaic solar device or the PD adapter.

2. The dual power supply system based on photovoltaic solar energy according to claim 1 is characterized in that: The control module comprises: A PD microcontroller unit, configured to communicate with the PD adapter through the USB Type-C PD standard, obtain power supply capability data of the PD adapter, and determine whether the power supply power of the PD adapter reaches a preset threshold based on the power supply capability data; A voltage comparator, used to compare the solar voltage with the PD voltage, and cut off or restore power supply to the PD end based on the comparison result; LED indicator light, used to provide power supply status and alarm indication.

3. The dual power supply system based on photovoltaic solar energy according to claim 2 is characterized in that: When the power supply capacity of the PD adapter is insufficient, the PD microcontroller unit provides a warning by flashing the LED indicator light and does not output the PD voltage.

4. The dual power supply system based on photovoltaic solar energy according to claim 3 is characterized in that: include: When the solar voltage is higher than the set value, the voltage comparator cuts off the power supply to the PD and provides an alarm by flashing the LED indicator; When the solar voltage is lower than the set value, the PD microcontroller unit restores the power supply of the PD adapter and turns off the LED indicator.

5. The dual power supply system based on photovoltaic solar energy according to claim 1 is characterized in that: The control module further includes: The adapter capability detection module is used to ensure that the voltage and current of the PD adapter meet the requirements of the powered device during the PD protocol voltage negotiation between the PD adapter and the control module, and not output voltage for adapters that do not meet the requirements.

6. The dual power supply system based on photovoltaic solar energy according to claim 1 is characterized in that: The standard operating voltage of the photovoltaic solar device is 20V, and the open circuit voltage is 24V.

7. The dual power supply system based on photovoltaic solar energy according to claim 2 is characterized in that: The control module further includes: The fast shutdown unit is used to prevent the solar voltage from flowing back to the PD adapter and the devices connected to it.

8. The dual power supply system based on photovoltaic solar energy according to claim 7 is characterized in that: The control module further includes: The over-temperature protection unit is used to automatically cut off the power supply of the photovoltaic solar device and the PD adapter when the temperature of the system exceeds a set threshold.

9. The dual power supply system based on photovoltaic solar energy according to claim 2 is characterized in that: The LED indicator lights include LED indicator lights of multiple different colors.

10. The dual power supply system based on photovoltaic solar energy according to claim 2, characterized in that: Also includes: The voice prompt unit is used to issue a voice prompt when the power supply is switched.

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