Solar charging circuit and electronic equipment
By designing a solar charging circuit including a judgment circuit, a switching circuit and a buck circuit, the problems of low safety, high cost, high power consumption and low efficiency in the prior art are solved, and higher safety, lower cost and power consumption, and higher charging efficiency are achieved.
Patent Information
- Application Number
- CN202422089867.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-27
AI Technical Summary
Existing solar charging circuits have problems such as low safety, high cost, high power consumption and low efficiency.
A solar charging circuit including a judgment circuit, a switching circuit and a buck circuit is designed. Through the judgment circuit, the judgment circuit outputs a judgment signal based on the voltage of the photovoltaic DC power. The switching circuit and the buck circuit transmit or buck the photovoltaic DC power in response to the judgment signal, so as to appropriately adjust the charging method under different lighting conditions.
It improves the safety of the circuit, reduces power consumption and cost, improves charging efficiency, and the circuit is simple and does not require a photoelectric chip.
Smart Images
Figure CN222996275U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of photovoltaic technology, and particularly relates to a solar charging circuit and an electronic device. Background Art
[0002] There are two common existing solar charging circuits. One is to directly charge the energy storage device in a direct charging manner. Under strong light, the output voltage of the solar panel becomes higher, which may exceed the maximum voltage of the energy storage device, resulting in overvoltage of the energy storage device and explosion, with low safety. The other uses a light energy chip to manage charging. The circuit is complex and requires a large number of inductors and resistors. These devices will consume corresponding power, resulting in low charging efficiency in low light conditions. In addition, the cost of a light energy chip is about $2 - $3, which is high. This leads to a significant increase in product cost, low cost performance, and no competitiveness.
[0003] Therefore, there is an urgent need for a solar charging circuit with high safety, low cost, low power consumption, and high efficiency. Utility Model Content
[0004] The purpose of this application is to provide a solar charging circuit and an electronic device, aiming to solve the problems of low safety, high cost, high power consumption, and low efficiency of the existing solar charging circuits.
[0005] An embodiment of this application provides a solar charging circuit, including:
[0006] A judgment circuit, configured to access photovoltaic direct current and output a judgment signal according to the voltage of the photovoltaic direct current;
[0007] A switching circuit, connected to the judgment circuit, configured to transmit the photovoltaic direct current in response to the judgment signal of the first level to output a first supply direct current;
[0008] A buck circuit, connected to the judgment circuit and the switching circuit, configured to step down the photovoltaic direct current in response to the judgment signal of the second level to output a second supply direct current;
[0009] Wherein, the first level and the second level are inverted.
[0010] In one embodiment, the solar charging circuit further includes:
[0011] An energy storage circuit, connected to the switching circuit and the buck circuit, configured to charge according to the first supply direct current or the second supply direct current.
[0012] In one embodiment, the solar charging circuit further includes:
[0013] A photovoltaic circuit, connected to the decision circuit, the switch circuit, and the buck circuit, is configured to convert light energy into the photovoltaic direct current electricity.
[0014] In one embodiment, the solar charging circuit further includes:
[0015] A first unidirectional conduction circuit, connected to the decision circuit and the switch circuit, is configured to conduct the photovoltaic direct current electricity unidirectionally.
[0016] The switch circuit is specifically configured to respond to the decision signal of the first level and transmit the unidirectionally conducted photovoltaic direct current electricity to output the first supply direct current electricity.
[0017] In one embodiment, the solar charging circuit further includes:
[0018] A second unidirectional conduction circuit, connected to the buck circuit, is configured to conduct the second supply direct current electricity unidirectionally.
[0019] In one embodiment, the solar charging circuit further includes:
[0020] A filtering circuit, connected to the decision circuit and the switch circuit, is configured to filter the photovoltaic direct current electricity.
[0021] The switch circuit is specifically configured to respond to the decision signal of the first level and transmit the filtered photovoltaic direct current electricity to output the first supply direct current electricity;
[0022] The decision circuit is specifically configured to output a decision signal according to the voltage of the filtered photovoltaic direct current electricity.
[0023] In one embodiment, the decision circuit includes a voltage conversion chip;
[0024] The input terminal of the voltage conversion chip serves as the input terminal of the photovoltaic direct current electricity of the decision circuit and is connected to the buck circuit to access the photovoltaic direct current electricity; the output terminal of the voltage conversion chip serves as the output terminal of the decision signal of the decision circuit and is connected to the switch circuit and the buck circuit to output the decision signal; the ground terminal of the voltage conversion chip is connected to the power ground.
[0025] In one embodiment, the switch circuit includes a field effect transistor;
[0026] The source electrode of the field effect transistor serves as the photovoltaic direct current input terminal of the switching circuit, and is connected to the decision circuit and the buck circuit to input the photovoltaic direct current; the gate electrode of the field effect transistor serves as the decision signal input terminal of the switching circuit, and is connected to the decision circuit and the buck circuit to input the decision signal; the drain electrode of the field effect transistor serves as the first power supply direct current output terminal of the switching circuit to output the first power supply direct current.
[0027] In one embodiment, the buck circuit includes a buck chip;
[0028] The input terminal of the buck chip serves as the photovoltaic direct current input terminal of the buck circuit, and is connected to the decision circuit and the switching circuit to input the photovoltaic direct current; the enable terminal of the buck chip serves as the decision signal input terminal of the buck circuit, and is connected to the decision circuit and the switching circuit to input the decision signal; the output terminal of the buck chip serves as the second power supply direct current output terminal of the buck circuit to output the second power supply direct current; the ground terminal of the buck chip is connected to the power ground.
[0029] The embodiment of the present application also provides an electronic device, and the electronic device includes the above-mentioned solar charging circuit.
[0030] The beneficial effects of the embodiment of the present application compared with the prior art are as follows: when the voltage of the photovoltaic direct current is lower than the preset voltage, the decision circuit outputs a decision signal of the first level, and the switching circuit responds to the decision signal of the first level to transmit the photovoltaic direct current and output the first power supply direct current; when the voltage of the photovoltaic direct current is higher than the preset voltage, the decision circuit outputs a decision signal of the second level, and the buck circuit responds to the decision signal of the second level to step down the photovoltaic direct current to output the second power supply direct current. Therefore, it directly uses the photovoltaic direct current for charging in low light, and steps down the photovoltaic direct current for charging in strong light, improving the circuit safety, with a simple circuit, no need for a light energy chip, reducing power consumption and cost, and improving efficiency. Description of the Drawings
[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0032] Figure 1 It is a schematic structural diagram of a solar charging circuit provided by an embodiment of the present application;
[0033] Figure 2Another structural schematic diagram of the solar charging circuit provided by an embodiment of the present application;
[0034] Figure 3 Another structural schematic diagram of the solar charging circuit provided by an embodiment of the present application;
[0035] Figure 4 Another structural schematic diagram of the solar charging circuit provided by an embodiment of the present application;
[0036] Figure 5 Another structural schematic diagram of the solar charging circuit provided by an embodiment of the present application;
[0037] Figure 6 Another structural schematic diagram of the solar charging circuit provided by an embodiment of the present application;
[0038] Figure 7 A partial example circuit schematic diagram of the solar charging circuit provided by an embodiment of the present application. Detailed implementation manners
[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0041] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 to the present application.
[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.
[0043] Figure 1 The structural schematic diagram of a solar charging circuit provided by an embodiment of the present application is shown. For ease of description, only the parts related to this embodiment are shown and are described in detail as follows:
[0044] The above-mentioned solar charging circuit includes a decision circuit 10, a switching circuit 30, and a buck circuit 20.
[0045] The decision circuit 10 is used to access photovoltaic direct current and output a decision signal according to the voltage of the photovoltaic direct current.
[0046] The switching circuit 30 is connected to the decision circuit 10 and is used to transmit the photovoltaic direct current in response to the decision signal of the first level to output a first supply direct current.
[0047] The buck circuit 20 is connected to the decision circuit 10 and the switching circuit 30 and is used to step down the photovoltaic direct current in response to the decision signal of the second level to output a second supply direct current.
[0048] Among them, the first level and the second level are inverted.
[0049] In a specific implementation, the first level can be a low level and the second level can be a high level.
[0050] When the voltage of the photovoltaic direct current is lower than the preset voltage, the decision circuit 10 outputs a decision signal of the first level, and the switching circuit 30 transmits the photovoltaic direct current in response to the decision signal of the first level to output a first supply direct current. When the voltage of the photovoltaic direct current is higher than the preset voltage, the decision circuit 10 outputs a decision signal of the second level, and the buck circuit 20 steps down the photovoltaic direct current in response to the decision signal of the second level to output a second supply direct current. Thus, charging is directly carried out using photovoltaic direct current in low light, and the photovoltaic direct current is stepped down for charging in strong light, improving the circuit safety, and the circuit is simple, without a light energy chip, reducing power consumption and cost, and improving efficiency.
[0051] As an example rather than a limitation, as Figure 2 shown, the solar charging circuit further includes an energy storage circuit 40.
[0052] The energy storage circuit 40 is connected to the switching circuit 30 and the buck circuit 20 and is used to charge according to the first supply direct current or the second supply direct current.
[0053] The energy storage circuit 40 can store light energy, reduce the instability of light energy power generation, and improve the utilization rate of light energy.
[0054] As an example rather than a limitation, as Figure 3 shown, the solar charging circuit further includes a photovoltaic circuit 50.
[0055] The photovoltaic circuit 50, connected to the decision circuit 10, the switching circuit 30, and the buck circuit 20, is used to convert light energy into photovoltaic direct current.
[0056] The photovoltaic circuit 50 is environmentally friendly and has a long service life.
[0057] By way of example and not limitation, as Figure 4 shown, the solar charging circuit further includes a first unidirectional conduction circuit 60.
[0058] The first unidirectional conduction circuit 60, connected to the decision circuit 10 and the switching circuit 30, is used to conduct the photovoltaic direct current unidirectionally.
[0059] The switching circuit 30 is specifically configured to respond to the decision signal of the first level and transmit the photovoltaic direct current after unidirectional conduction to output the first supply direct current.
[0060] The first unidirectional conduction circuit 60 reduces the possibility of current backflow caused by the voltage of the energy storage circuit 40 being higher than the voltage of the photovoltaic direct current, improving the safety of the solar charging circuit.
[0061] By way of example and not limitation, as Figure 5 shown, the solar charging circuit further includes a second unidirectional conduction circuit 70.
[0062] The second unidirectional conduction circuit 70, connected to the buck circuit 20, is configured to conduct the second supply direct current unidirectionally.
[0063] The second unidirectional conduction circuit 70 reduces the possibility of current backflow caused by the voltage of the energy storage circuit 40 being higher than the voltage of the second supply direct current, improving the safety of the solar charging circuit.
[0064] By way of example and not limitation, as Figure 6 shown, the solar charging circuit further includes a filtering circuit 80.
[0065] The filtering circuit 80, connected to the decision circuit 10 and the switching circuit 30, is used to filter the photovoltaic direct current.
[0066] The switching circuit 30 is specifically configured to respond to the decision signal of the first level and transmit the filtered photovoltaic direct current to output the first supply direct current.
[0067] The decision circuit 10 is specifically configured to output a decision signal according to the voltage of the filtered photovoltaic direct current.
[0068] The filtering circuit 80 improves the stability of the solar charging circuit.
[0069] Figure 7The figure shows a partial example circuit structure of the solar charging circuit provided by the embodiments of the present application. For the sake of convenience of description, only the parts related to the embodiments of the present application are shown and are described in detail as follows:
[0070] The decision circuit 10 includes a voltage conversion chip U1.
[0071] The input terminal VIN of the voltage conversion chip U1 serves as the photovoltaic direct current input terminal of the decision circuit 10 and is connected to the buck circuit 20 to access the photovoltaic direct current; the output terminal VOUT of the voltage conversion chip U1 serves as the decision signal output terminal of the decision circuit 10 and is connected to the switch circuit 30 and the buck circuit 20 to output the decision signal; the ground terminal GND of the voltage conversion chip U1 is connected to the power ground.
[0072] This circuit is simple and reliable.
[0073] The switch circuit 30 includes a field effect transistor Q1.
[0074] The source electrode of the field effect transistor Q1 serves as the photovoltaic direct current input terminal of the switch circuit 30 and is connected to the decision circuit 10 and the buck circuit 20 to input the photovoltaic direct current; the gate electrode of the field effect transistor Q1 serves as the decision signal input terminal of the switch circuit 30 and is connected to the decision circuit 10 and the buck circuit 20 to input the decision signal; the drain electrode of the field effect transistor Q1 serves as the first power supply direct current output terminal of the switch circuit 30 to output the first power supply direct current.
[0075] The field effect transistor Q1 has low power consumption and fast response speed.
[0076] The buck circuit 20 includes a buck chip U2.
[0077] The input terminal VIN of the buck chip U2 serves as the photovoltaic direct current input terminal of the buck circuit 20 and is connected to the decision circuit 10 and the switch circuit 30 to input the photovoltaic direct current; the enable terminal EN of the buck chip U2 serves as the decision signal input terminal of the buck circuit 20 and is connected to the decision circuit 10 and the switch circuit 30 to input the decision signal; the output terminal VOUT of the buck chip U2 serves as the second power supply direct current output terminal of the buck circuit 20 to output the second power supply direct current; the ground terminal GND of the buck chip U2 is connected to the power ground.
[0078] The buck chip U2 has low cost and high efficiency.
[0079] The energy storage circuit 40 includes a first capacitor C1.
[0080] The first end of the first capacitor C1 serves as the first power supply direct current input terminal and the second power supply direct current input terminal of the energy storage circuit 40 and is connected to the switch circuit 30 and the buck circuit 20 to input the first power supply direct current and the second power supply direct current; the second end of the first capacitor C1 is connected to the power ground.
[0081] The photovoltaic circuit 50 includes a solar panel SUN1.
[0082] The positive electrode of the solar panel SUN1 serves as the photovoltaic direct current output terminal of the photovoltaic circuit 50 and is connected to the first unidirectional conduction circuit 60, the decision circuit 10, the buck circuit 20, and the filtering circuit 80 to output photovoltaic direct current; the negative electrode of the solar panel SUN1 is connected to the power ground.
[0083] The first unidirectional conduction circuit 60 includes a first diode D1.
[0084] The positive electrode of the first diode D1 serves as the photovoltaic direct current input terminal of the first unidirectional conduction circuit 60 and is connected to the decision circuit 10 and the switch circuit 30 to input photovoltaic direct current; the negative electrode of the first diode D1 serves as the output terminal of the photovoltaic direct current after unidirectional conduction of the first unidirectional conduction circuit 60 and is connected to the switch circuit 30 to output the photovoltaic direct current after unidirectional conduction.
[0085] The second unidirectional conduction circuit 70 includes a second diode D2.
[0086] The positive electrode of the second diode D2 serves as the second power supply direct current input terminal of the second unidirectional conduction circuit 70 and is connected to the buck circuit 20 to input the second power supply direct current; the negative electrode of the second diode D2 serves as the output terminal of the second power supply direct current after unidirectional conduction of the second unidirectional conduction circuit 70 and is connected to the switch circuit 30 and the energy storage circuit 40 to output the second power supply direct current after unidirectional conduction.
[0087] The filtering circuit 80 includes a second capacitor C2.
[0088] The first end of the second capacitor C2 serves as the photovoltaic direct current input terminal of the filtering circuit 80 and the output terminal of the filtered photovoltaic direct current of the filtering circuit 80, and is connected to the energy storage circuit 40, the first unidirectional conduction circuit 60, the decision circuit 10, and the buck circuit 20 to input photovoltaic direct current and output the filtered photovoltaic direct current; the second end of the second capacitor C2 is connected to the power ground.
[0089] The following further explains with reference to the working principle Figure 7 as shown below:
[0090] The solar panel SUN1 converts light energy into photovoltaic direct current, and outputs the photovoltaic direct current from the positive electrode of the solar panel SUN1 to the positive electrode of the first diode D1, the input terminal VIN of the voltage conversion chip U1, and the input terminal VIN of the buck chip U2. The first diode D1 conducts the photovoltaic direct current unidirectionally and then outputs it to the source electrode of the field effect transistor Q1.
[0091] When the voltage of the photovoltaic direct current is lower than the preset voltage (i.e., when the solar panel SUN1 receives weak light), the voltage conversion chip U1 outputs a low-level decision signal to the gate of the field-effect transistor Q1 and the enable terminal EN of the buck chip U2 according to the voltage of the photovoltaic direct current. The buck chip U2 stops working, the field-effect transistor Q1 conducts, and the drain of the field-effect transistor Q1 outputs the first supply direct current to the first terminal of the first capacitor C1, and the first capacitor C1 is charged according to the first supply direct current.
[0092] When the voltage of the photovoltaic direct current is higher than the preset voltage (i.e., when the solar panel SUN1 receives strong light), the voltage conversion chip U1 outputs a high-level decision signal to the gate of the field-effect transistor Q1 and the enable terminal EN of the buck chip U2 according to the voltage of the photovoltaic direct current. The field-effect transistor Q1 is cut off, and the buck chip U2 steps down the photovoltaic direct current in response to the high-level decision signal and outputs the second supply direct current from the output terminal VOUT of the buck chip U2 to the positive electrode of the second diode D2. The second diode D2 conducts the second supply direct current unidirectionally and then outputs it to the first terminal of the first capacitor C1, and the first capacitor C1 is charged according to the second supply direct current.
[0093] The embodiment of the present application also provides an electronic device, and the electronic device includes the above-mentioned solar charging circuit.
[0094] For example, the electronic device includes a light remote control.
[0095] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The order of execution of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
[0096] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. A solar charging circuit, characterized in that: include: A decision circuit, used for accessing photovoltaic direct current and outputting a decision signal according to the voltage of the photovoltaic direct current; a switch circuit, connected to the decision circuit, and configured to transmit the photovoltaic direct current in response to the decision signal of the first level to output a first power supply direct current; a step-down circuit, connected to the decision circuit and the switch circuit, and configured to step down the photovoltaic direct current in response to the decision signal of the second level to output a second power supply direct current; The first level and the second level are in opposite phases.
2. The solar charging circuit according to claim 1, characterized in that: Also includes: An energy storage circuit is connected to the switch circuit and the step-down circuit, and is used for charging according to the first supply DC power or the second supply DC power.
3. The solar charging circuit according to claim 1, characterized in that: Also includes: The photovoltaic circuit is connected to the decision circuit, the switch circuit and the step-down circuit, and is used for converting light energy into the photovoltaic direct current.
4. The solar charging circuit according to claim 1, characterized in that: Also includes: A first unidirectional conduction circuit, connected to the decision circuit and the switch circuit, for conducting unidirectional conduction of the photovoltaic direct current; The switch circuit is specifically configured to transmit the photovoltaic direct current after unidirectional conduction in response to the decision signal of the first level, so as to output a first power supply direct current.
5. The solar charging circuit according to claim 1, characterized in that: Also includes: The second unidirectional conducting circuit is connected to the step-down circuit and is configured to unidirectionally conduct the second supply DC power.
6. The solar charging circuit according to any one of claims 1 to 5, characterized in that: Also includes: A filter circuit, connected to the decision circuit and the switch circuit, for filtering the photovoltaic direct current; The switch circuit is specifically used for transmitting the filtered photovoltaic direct current in response to the decision signal of the first level to output a first power supply direct current; The decision circuit is specifically used to output a decision signal according to the voltage of the photovoltaic direct current after filtering.
7. The solar charging circuit according to claim 1, characterized in that: The decision circuit includes a voltage conversion chip; The input end of the voltage conversion chip serves as the photovoltaic direct current input end of the judgment circuit, and is connected to the step-down circuit to access the photovoltaic direct current; the output end of the voltage conversion chip serves as the judgment signal output end of the judgment circuit, and is connected to the switching circuit and the step-down circuit to output the judgment signal; the ground end of the voltage conversion chip is connected to the power ground.
8. The solar charging circuit according to claim 1, characterized in that: The switch circuit includes a field effect transistor; The source of the field effect tube serves as the photovoltaic direct current input terminal of the switching circuit, and is connected to the decision circuit and the step-down circuit to input the photovoltaic direct current; the gate of the field effect tube serves as the decision signal input terminal of the switching circuit, and is connected to the decision circuit and the step-down circuit to input the decision signal; the drain of the field effect tube serves as the first power supply direct current output terminal of the switching circuit to output the first power supply direct current.
9. The solar charging circuit according to claim 1, characterized in that: The step-down circuit includes a step-down chip; The input end of the buck chip serves as the photovoltaic DC input end of the buck circuit, and is connected to the decision circuit and the switch circuit to input the photovoltaic DC; the enable end of the buck chip serves as the decision signal input end of the buck circuit, and is connected to the decision circuit and the switch circuit to input the decision signal; the output end of the buck chip serves as the second power supply DC output end of the buck circuit to output the second power supply DC; the ground end of the buck chip is connected to the power ground.
10. An electronic device, characterized in that: The invention comprises a solar charging circuit as claimed in any one of claims 1 to 9.