Protection circuit based on solar charging, circuit board and electronic equipment

Abstract

The utility model discloses a protection circuit based on solar charging, a circuit board and electronic equipment, and the protection circuit comprises a charging unit which comprises a charging chip, an MOS tube, a triode, a charging interface and a battery, one end of the charging interface is connected with the source electrode of the MOS tube, and the other end of the charging interface is connected with the grid electrode of the MOS tube through the triode; a power supply input end of the charging chip is connected with a drain electrode of the MOS tube, and a switch pin of the charging chip is connected with the charging interface through the battery; the protection unit comprises a detection chip and an indicator light, and the power input end of the detection chip is connected with the battery so as to control the indicator light according to the voltage signal; the first signal output end of the detection chip is connected with the base electrode of the triode so as to control the MOS tube to be switched on or switched off. According to the embodiment of the invention, when the circuit is in the overvoltage protection state, the charging indicating lamp can be normally displayed, and the operation of the circuit can be automatically recovered.

Description

Technical Field

[0001] The utility model relates to the technical field of solar charging, and in particular to a protection circuit, a circuit board and an electronic device based on solar charging. Background Art

[0002] With the development of large-scale industry, a lot of energy waste and environmental pollution have been aggravated. Environmentally friendly and energy-saving products have been given priority, especially solar energy products, which have been promoted and applied unprecedentedly.

[0003] At present, when charging with solar energy, the platform voltage during charging is generally selected as the reference voltage for charging. In the actual charging process, the no-load voltage of the solar circuit board is higher than the maximum voltage. When the light environment changes during the charging process of existing products, the no-load voltage output by the solar panel will be too high, which directly causes the circuit to not work due to overvoltage protection. Even if the light environment is restored to sufficient light later, the circuit is still in the overvoltage protection state, and the charging indicator light is also in an abnormal state. Utility Model Content

[0004] The embodiments of the present application provide a protection circuit, a circuit board and an electronic device based on solar charging. When the circuit is in overvoltage protection, the charging indicator light can display normally and automatically restore the circuit operation.

[0005] In a first aspect, an embodiment of the present application provides a protection circuit based on solar charging, comprising:

[0006] A charging unit, comprising a charging chip, a MOS tube, a triode, a charging interface and a battery, wherein one end of the charging interface is connected to the source of the MOS tube, and the other end of the charging interface is connected to the gate of the MOS tube through the triode; a power input end of the charging chip is connected to the drain of the MOS tube, and a switch pin of the charging chip is connected to the charging interface through the battery;

[0007] The protection unit comprises a detection chip and an indicator light, wherein the power input end of the detection chip is connected to the battery to control the indicator light according to the voltage signal; and the first signal output end of the detection chip is connected to the base of the transistor to control the MOS tube to be turned on or off.

[0008] In some embodiments, the second signal output terminal of the detection chip is connected to the indicator light to output an indication signal to control the indicator light.

[0009] In some embodiments, when the battery is in a charging state, the indicator light is red, and when the battery is fully charged, the indicator light is green.

[0010] In some embodiments, when the battery is charged for more than a first preset time period, the second signal output terminal of the detection chip outputs an indication signal to control the indicator light to turn green, and the first preset time period is 6 hours.

[0011] In some embodiments, a ground terminal is provided at a connection point between the battery and the detection chip to protect the battery and the detection chip.

[0012] In some embodiments, the first signal output terminal of the detection chip outputs a control signal at intervals of a second preset time period, and the second preset time period is 10 minutes.

[0013] In some embodiments, the control signal is a high level signal and a low level signal, and the control signal is used to switch the working state of the MOS tube to reconnect the charging interface and the charging chip.

[0014] In some embodiments, the charging unit further includes a resistor, the MOS tube is connected to the charging chip via the resistor, and the resistor is used to stabilize the circuit voltage.

[0015] In a second aspect, an embodiment of the present application provides a circuit board, comprising the protection circuit as described in the first aspect.

[0016] In a third aspect, an embodiment of the present application provides an electronic device, comprising the circuit board as described in the second aspect.

[0017] A protection circuit, circuit board and electronic device based on solar charging provided by the embodiments of the present application have at least the following beneficial effects: the protection circuit includes a charging unit, including a charging chip, a MOS tube, a triode, a charging interface and a battery, one end of the charging interface is connected to the source of the MOS tube, and the other end of the charging interface is connected to the gate of the MOS tube through the triode; the power input end of the charging chip is connected to the drain of the MOS tube, and the switch pin of the charging chip is connected to the charging interface through the battery; the protection unit includes a detection chip and an indicator light, the power input end of the detection chip is connected to the battery to control the indicator light according to the voltage signal; the first signal output end of the detection chip is connected to the base of the triode to control the MOS tube to be turned on or off; the embodiment of the present application controls the operation of the charging indicator light according to the voltage signal through the detection chip, and achieves the effect of re-conducting the protection circuit through the switching of the working state of the MOS tube, thereby realizing that the charging indicator light can be displayed normally when the circuit is in overvoltage protection and the circuit automatically resumes operation.

[0018] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A circuit diagram of a protection circuit provided in an embodiment of the present application;

[0020] Figure 2 A circuit diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying 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.

[0022] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0024] At present, in the existing solar charging products, when the solar panel is normally charging the product, if a cloud in the sky or a shadow of a leaf passes over the solar panel, the no-load voltage output by the solar panel will be too high, which will directly cause the product to stop working due to overvoltage protection. Even if the cloud or the shadow of a leaf disappears and sufficient light source is restored, the circuit is already in the overvoltage protection state, and no charging current will enter the product, resulting in a major functional defect, and the charging indicator light will also display abnormally.

[0025] Based on this, the embodiments of the present application provide a protection circuit, circuit board and electronic device based on solar charging. When the circuit is in overvoltage protection, the charging indicator light can display normally and automatically restore circuit operation.

[0026] A protection circuit, a circuit board and an electronic device based on solar charging are described below in conjunction with the accompanying drawings.

[0027] Reference Figure 1 As shown, Figure 1 A circuit diagram of a protection circuit provided in an embodiment of the present application.

[0028] The embodiment of the present application provides a protection circuit based on solar charging, including: a charging unit 100, including a charging chip U1, a MOS tube Q3, a transistor Q4, a charging interface 110 and a battery 120, one end of the charging interface 110 is connected to the source of the MOS tube Q3, and the other end of the charging interface 110 is connected to the gate of the MOS tube Q3 through the transistor Q4; the power input end of the charging chip U1 is connected to the drain of the MOS tube Q3, and the switch pin of the charging chip U1 is connected to the charging interface 110 through the battery 120; the protection unit 200 includes a detection chip U3 and an indicator light 210, the power input end of the detection chip U3 is connected to the battery 120 to control the indicator light 210 according to the voltage signal; the first signal output end of the detection chip U3 is connected to the base of the transistor Q4 to control the MOS tube Q3 to be turned on or off.

[0029] It should be noted that the charging chip U1 is responsible for charging management, such as the regulation of current and voltage, and the control of the charging process. When the light source environment becomes weak, a cloud in the sky or a shadow of a leaf blocks the solar panel from obtaining energy, and the output no-load voltage is too high, and the charging chip U1 enters the overvoltage protection mode to protect the circuit. The MOS tube Q3 is used as an electronic switch to control the on and off of the charging circuit. Under normal circumstances, when an external power source, such as a solar panel, is connected to the charging interface 110, the current flows into the source of the MOS tube Q3 through the charging interface 110. The turned-on MOS tube Q3 transmits the current from the source to the drain, thereby powering the charging chip U1, thereby charging the battery 120. When the circuit is in the overvoltage protection state, the gate of the MOS tube Q3 receives a signal from the triode Q4, and switches from the on-off-on working state to simulate the action of reconnecting to charging, thereby achieving the effect of automatically restoring the circuit operation. The charging chip U1 forms a feedback loop with the battery 120 and the charging interface 110 through its switch pin to ensure that the battery 120 is charged safely and efficiently. The detection chip U3 receives the voltage signal from the battery 120, processes and analyzes it, and monitors the voltage and other parameters of the battery 120 in real time to ensure the safety of the battery 120. The detection chip U3 monitors the voltage signal information input by the battery 120, analyzes and determines the charging state of the battery 120, and thus controls the display color of the indicator light 210. The signal output end of the detection chip U3 sends a control signal, and drives the working state of the MOS tube Q3 to switch through the transistor Q4. The control signal causes the transistor Q4 to change its working state, thereby controlling the gate voltage of the MOS tube Q3, so that the MOS tube Q3 is cut off or turned on.

[0030] In some embodiments, the second signal output terminal of the detection chip U3 is connected to the indicator light 210 to output an indication signal to control the indicator light 210 .

[0031] It should be noted that the second signal output terminal includes a first port and a second port, which respectively control the indicator lights 210 of two colors, so as to control the indicator lights 210 to change colors according to the output indication signal. The indication signal is obtained according to the voltage signal input by the battery 120.

[0032] In some embodiments, when the battery 120 is in a charging state, the indicator light 210 is red, and when the battery 120 is fully charged, the indicator light 210 is green.

[0033] It should be noted that when the battery 120 is in a charging state, a voltage signal of the charging state is input to the power input terminal of the detection chip U3, and the detection chip U3 outputs an indication signal to the indicator light 210 via the first port controlling the red light. When the battery 120 is in a charging completion state, a voltage signal of the charging completion state is input to the power input terminal of the detection chip U3, and the detection chip U3 outputs an indication signal to the indicator light 210 via the second port controlling the green light.

[0034] In some embodiments, when the battery 120 is charged for more than a first preset time period, the second signal output terminal of the detection chip U3 outputs an indication signal to control the indicator light 210 to turn green, and the first preset time period is 6 hours.

[0035] It should be noted that when there is a deviation in the voltage signal, after the detection chip U3 is set to detect that the battery 120 has been charged for more than 6 hours, the second port is controlled to output an indication signal to the indicator light 210, and the indicator light 210 turns green.

[0036] In some embodiments, a ground terminal is provided at a connection point between the battery 120 and the detection chip U3 to protect the battery 120 and the detection chip U3.

[0037] It should be noted that by connecting the battery 120 and the detection chip U3 to the ground terminal, the influence of interference and electromagnetic waves on the circuit can be effectively reduced, and the anti-interference ability of the circuit can also be improved, protecting the battery 120 and the detection chip U3 from the influence of the external environment. When the charging chip U1 is abnormal, the battery 120 can be protected and the potential problems and failure rate in the circuit can be reduced.

[0038] In some embodiments, the first signal output terminal of the detection chip U3 outputs a control signal at intervals of a second preset time period, and the second preset time period is 10 minutes.

[0039] In some embodiments, the control signal is a high level signal and a low level signal, and the control signal is used to switch the working state of the MOS tube Q3 to reconnect the charging interface 110 and the charging chip U1.

[0040] It should be noted that when a dark shadow blocks the solar panel, the solar panel will output a high level close to no-load due to insufficient light intensity, causing the charging chip U1 to be in a self-protection state due to high-voltage input. After the dark shadow disappears, when the solar panel regains sufficient light, the charging chip U1 still cannot restore itself to the working state. At this time, only a small current is charged into the battery 120, and the MOS tube Q3 switches from connected to disconnected and then to connected. The reconnection action is simulated inside the circuit to restore the charging chip U1 to the working state, forming a normal charging state.

[0041] In some embodiments, the charging unit 100 further includes a resistor R16, and the MOS tube Q3 is connected to the charging chip U1 via the resistor R16, and the resistor R16 is used to stabilize the circuit voltage.

[0042] It should be noted that the use of resistor R16 in the charging unit 100 can help regulate voltage and current, prevent circuit overload or short circuit, and thus protect the battery 120 and other components from damage. Reasonable selection and use of resistor R16 can improve the efficiency and stability of the charging system, ensure the smooth charging process and improve the reliability of the entire system.

[0043] An embodiment of the present application also provides a circuit board, including the protection circuit as described above.

[0044] An embodiment of the present application also provides an electronic device, including the circuit board as described above.

[0045] Reference Figure 2 As shown, Figure 2 A circuit diagram of an electronic device provided in an embodiment of the present application.

[0046] In one embodiment of the present application, the electronic device described above is a solar-powered LED lamp, and further includes a step switch SW1 and a first access circuit, a second access circuit, and a third access circuit. Different signals are input into the detection chip by accessing different circuits through the step switch SW1, so that the detection chip outputs a light-on signal to control the LED lamp. The step switch SW1 is not connected to the circuit, so that the detection chip does not output a light-on signal to control the LED lamp, thereby controlling the LED lamp to switch to a shutdown mode, accessing the first access circuit through the step switch SW1 to control the LED lamp to switch to a weak light mode, accessing the second access circuit through the step switch SW1 to control the LED lamp to switch to a medium light mode, and accessing the third access circuit through the step switch SW1 to control the LED lamp to switch to a strong light mode.

[0047] In one embodiment of the present application, a solar-charging-based LED lamp also includes an intensity transistor Q2. After the step switch SW1 is connected to different access circuits, the intensity of the light source is amplified by different multiples through the intensity transistor Q2, thereby achieving three different light intensities of weak, medium, and strong.

[0048] In one embodiment of the present application, a solar-charging-based LED lamp further includes a light-off transistor Q1. When the LED lamp is in a charging state, the light-off transistor Q1 is in an on state, and a low-level signal is input to the detection chip U3, so that the detection chip U3 does not output a light-on signal, thereby controlling the LED lamp to switch to a shutdown mode.

[0049] A protection circuit based on solar charging includes a charging unit, including a charging chip, a MOS tube, a triode, a charging interface and a battery, wherein one end of the charging interface is connected to the source of the MOS tube, and the other end of the charging interface is connected to the gate of the MOS tube through the triode; the power input end of the charging chip is connected to the drain of the MOS tube, and the switch pin of the charging chip is connected to the charging interface through the battery; the protection unit includes a detection chip and an indicator light, wherein the power input end of the detection chip is connected to the battery to control the indicator light according to a voltage signal; the first signal output end of the detection chip is connected to the base of the triode to control the MOS tube to be turned on or off; the embodiment of the present application controls the operation of the charging indicator light according to the voltage signal through the detection chip, and achieves the effect of re-conducting the protection circuit through the switching of the working state of the MOS tube, thereby realizing that the charging indicator light can be displayed normally when the circuit is in overvoltage protection and the circuit automatically resumes operation.

[0050] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0051] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0052] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0053] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0054] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0055] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0056] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0057] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0058] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0059] The preferred embodiments of the present disclosure are described above with reference to the accompanying drawings, but the scope of the rights of the present disclosure is not limited thereto. Any modification, equivalent substitution and improvement made by those skilled in the art without departing from the scope and essence of the present disclosure should be within the scope of the rights of the present disclosure.

Claims

1. A protection circuit based on solar charging, characterized in that: include: A charging unit, comprising a charging chip, a MOS tube, a triode, a charging interface and a battery, wherein one end of the charging interface is connected to the source of the MOS tube, and the other end of the charging interface is connected to the gate of the MOS tube through the triode; a power input end of the charging chip is connected to the drain of the MOS tube, and a switch pin of the charging chip is connected to the charging interface through the battery; The protection unit comprises a detection chip and an indicator light, wherein the power input end of the detection chip is connected to the battery to control the indicator light according to the voltage signal; and the first signal output end of the detection chip is connected to the base of the transistor to control the MOS tube to be turned on or off.

2. The protection circuit according to claim 1, characterized in that: The second signal output terminal of the detection chip is connected to the indicator light to output an indication signal to control the indicator light.

3. The protection circuit according to claim 2, characterized in that: When the battery is in a charging state, the indicator light is red, and when the battery is fully charged, the indicator light is green.

4. The protection circuit according to claim 3, characterized in that: When the battery is charged for more than a first preset time period, the second signal output terminal of the detection chip outputs an indication signal to control the indicator light to turn green, and the first preset time period is 6 hours.

5. The protection circuit according to claim 1, characterized in that: A ground terminal is provided at a connection point between the battery and the detection chip to protect the battery and the detection chip.

6. The protection circuit according to claim 1, characterized in that: The first signal output terminal of the detection chip outputs a control signal at intervals of a second preset time period, and the second preset time period is 10 minutes.

7. The protection circuit according to claim 6, characterized in that: The control signal is a high level signal and a low level signal, and the control signal is used to switch the working state of the MOS tube to reconnect the charging interface and the charging chip.

8. The protection circuit according to claim 1, characterized in that: The charging unit further includes a resistor, the MOS tube is connected to the charging chip via the resistor, and the resistor is used to stabilize the circuit voltage.

9. A circuit board, characterized in that: It comprises a protection circuit based on solar charging as described in any one of claims 1 to 8.

10. An electronic device, characterized in that: Comprising the circuit board as claimed in claim 9.

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