CN115800487B - Low-light solar power supply circuit and power supply method - Google Patents
Low-light solar power supply circuit and power supply method Download PDFInfo
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- CN115800487B CN115800487B CN202211613751.1A CN202211613751A CN115800487B CN 115800487 B CN115800487 B CN 115800487B CN 202211613751 A CN202211613751 A CN 202211613751A CN 115800487 B CN115800487 B CN 115800487B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims abstract description 147
- 229910052715 tantalum Inorganic materials 0.000 claims description 6
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical group [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 6
- 239000010926 waste battery Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Abstract
The invention belongs to the technical field of low-power consumption power supply, and provides a low-light solar power supply circuit and a power supply method, wherein the circuit comprises: the super capacitor is connected with the load circuit; the rapid starting capacitor is connected with the load circuit; the low-light solar panel is used for charging the rapid starting capacitor and the super capacitor; the first switch is used for controlling the connection state between the super capacitor and the low-light solar panel; and the voltage detector is used for controlling the first switch according to the voltage of the super capacitor. According to the invention, the super capacitor and the quick start capacitor are arranged, so that the super capacitor can be charged through the low-light solar panel, and electric energy is provided for a load in a low-light or no-light scene; the quick start capacitor can be quickly charged to supply power to the load under the condition of low electric quantity of the super capacitor, so that the problems that the super capacitor is long in charging time and the load circuit cannot be started in the early stage are solved; meanwhile, the first switch and the voltage detector are matched to avoid overcharge of the super capacitor and ensure circuit stability.
Description
Technical Field
The invention relates to the technical field of low-power consumption power supply, in particular to a low-light solar power supply circuit and a low-light solar power supply method.
Background
According to the related investigation data, about 150 hundred million waste batteries are produced annually worldwide, only 2% of which can be recycled through the regular flow, and a significant part of the waste batteries come from the remote controls of most televisions and set-top boxes worldwide. Calculated with televisions commonly used in the home, assuming a television is used for about 7 years, changing the battery in the remote control only once per year means that 14 batteries will be used up and thrown away every time a television is sold. If we apply this number to 2.1 billions of global television annual sales in 2021, approximately the equivalent of 30 billions of waste batteries would be present.
In order to solve the problems of endurance limit of the remote controller caused by batteries, environmental pollution caused by battery discarding and the like, a power supply circuit is urgently needed, so that manufacturers for manufacturing the remote controller or other low-power consumption consumer electronic products can utilize the remote controller to eliminate the dependence of equipment on the batteries, and the maintenance cost of the equipment and the problems of equipment failure and equipment shutdown caused by limited battery endurance are reduced, thereby providing permanent endurance remote controllers and other low-power consumption sensors for consumers and commercial markets.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a low-light solar power supply circuit and a power supply method, which are used for solving the problems of endurance limit and environmental pollution caused by battery power supply of the existing remote controller.
In a first aspect, the present invention provides a micro-optic solar power supply circuit, comprising:
the super capacitor is connected with the load circuit;
the rapid starting capacitor is connected with the load circuit;
the low-light solar panel is used for charging the rapid starting capacitor and the super capacitor;
the first switch is used for controlling the connection state between the super capacitor and the low-light solar panel;
and the voltage detector is used for controlling the first switch according to the voltage of the super capacitor.
Optionally, the first switch is specifically configured to:
when the voltage value of the super capacitor is smaller than a first set value, the connection between the low-light solar panel and the super capacitor is maintained;
and when the voltage value of the super capacitor is equal to a first set value, controlling the low-light solar panel and the super capacitor to be disconnected.
Optionally, the first switch is a first MOS transistor, a source electrode of the first MOS transistor is connected to the micro-light solar panel, a gate electrode of the first MOS transistor is connected to a collector electrode of the triode Q6, and a drain electrode of the first MOS transistor is connected to a fast start capacitor.
Optionally, the device further comprises a second switch, the second switch is connected with the super capacitor, and the second switch is used for:
and when the voltage value of the load circuit is smaller than a second set value, the second switch disconnects the super capacitor from the load circuit.
Optionally, the second switch is a second MOS transistor, a drain electrode of the second MOS transistor is connected to the first switch, a source electrode of the second MOS transistor is connected to the super capacitor E1, and a gate electrode of the second MOS transistor is connected to the load circuit.
Optionally, the voltage detector is specifically configured to:
acquiring a voltage value of the super capacitor;
when the voltage of the super capacitor is equal to the first set value, the voltage detector outputs a high level to turn off the first switch.
Optionally, the fast start capacitor is a tantalum capacitor.
In a second aspect, the present invention provides a micro-optic solar power supply method, including:
the quick start capacitor and the super capacitor are respectively connected with a load circuit; the super capacitor or the quick start capacitor is connected with the low-light solar panel to be charged;
obtaining the output voltage of a load circuit;
when the output voltage of the load circuit is smaller than a second set value, the connection between the load circuit and the super capacitor is disconnected;
and when the output voltage of the load circuit is not smaller than a second set value, connecting the load circuit and the super capacitor.
Optionally, the method further comprises:
obtaining the output voltage of the super capacitor;
when the output voltage of the super capacitor is smaller than a first set value, the connection between the low-light solar panel and the super capacitor is maintained; otherwise, disconnecting the low-light solar panel and the super capacitor.
By adopting the technical scheme, the application has the following beneficial effects:
according to the invention, the super capacitor and the quick start capacitor are arranged, so that the super capacitor can be charged through the low-light solar panel, and electric energy is provided for a load in a low-light or no-light scene; the quick start capacitor can be quickly charged to supply power to the load under the condition of low electric quantity of the super capacitor, so that the problems that the super capacitor is long in charging time and the load circuit cannot be started in the early stage are solved; meanwhile, the first switch and the voltage detector are matched to avoid overcharge of the super capacitor and ensure circuit stability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
Fig. 1 shows a schematic diagram of a scene of a micro-light solar power supply circuit according to an embodiment of the present invention;
FIG. 2 shows a flow chart of a micro-optic solar power supply circuit according to an embodiment of the present invention;
fig. 3a shows a schematic diagram of a load circuit according to an embodiment of the present invention;
fig. 3b shows a schematic diagram of a load circuit according to an embodiment of the present invention;
fig. 4 shows a flowchart of a micro-light solar power supply method according to an embodiment of the invention.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, which should not be construed as limiting the scope of the present invention.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.
The remote controller is widely applied to the application scenario shown in fig. 1, meanwhile, most of the current remote controllers still rely on a battery power supply mode, the problem of endurance cannot be solved, and the environmental impact caused by waste batteries is also huge. However, if solar energy is used for power supply, there are dim light or no light scenes such as night, overcast and rainy weather, and how to solve the above problems is provided.
As shown in fig. 2, fig. 2 shows a micro-light solar power supply circuit provided in this embodiment, including:
the super capacitor is connected with the load circuit;
the rapid starting capacitor is connected with the load circuit;
the low-light solar panel is used for charging the rapid starting capacitor and/or the super capacitor;
the first switch is used for controlling the connection state between the super capacitor and the low-light solar panel;
and the voltage detector is used for controlling the first switch according to the voltage of the super capacitor.
Specifically, the embodiment selects the 5V solar panel and the 3.8V super capacitor, so that when the super capacitor is charged by using the solar panel, an overvoltage condition that the super capacitor is still continuously charged after being full may occur. Therefore, in this embodiment, by setting a first switch, corresponding to fig. 2, the first switch is the MOS transistor Q5, when the super capacitor is full, the micro-light solar panel and the super capacitor are disconnected, once the load circuit connected to the super capacitor consumes the electric quantity of the super capacitor to reduce the voltage, the micro-light solar panel is connected to the super capacitor again, so as to continue charging.
It is known that the battery can negatively affect its lifetime, either over-charge or over-discharge, directly to the point that the lifetime is reduced. In the embodiment, the low-light solar panel is used as an energy source of the circuit, the super capacitor is used as energy storage equipment to continuously supply power under a low-light scene, so that the work of the circuit is ensured, and the service life of the circuit is not negatively influenced by overcharge and overdischarge compared with a battery.
Under the condition, the voltage of the super capacitor is obtained by arranging the voltage detector, and when the input voltage of the input pin of the voltage detector exceeds 3.8V, the output pin of the voltage detector outputs a high level; and the triode Q6 is cut off, so that the MOS tube Q5 is cut off, and the connection between the low-light solar panel and the super capacitor is disconnected.
In this embodiment, the super capacitor is used to make use of the characteristic that the capacity of the super capacitor is large, but due to the characteristic of the super capacitor, when the product is used for the first time or when the load circuit is reused after stopping working, if the ambient light is not strong, the starting is very slow, because the super capacitor needs a long time to enable the circuit to work, and there are situations that the strong enough light intensity cannot be achieved in cloudy days, rainy days, and the like when no sun exists. Based on this, in this embodiment, by adding a quick start capacitor to the circuit, the quick start capacitor needs to be able to be quickly charged to enable the load circuit to start to work, so as to implement quick start.
In one possible implementation, the fast start capacitor uses a 470 μf patch tantalum capacitor. Due to the material and capacity of the tantalum capacitor, the tantalum capacitor can meet the requirement of quick starting of a load circuit.
As shown in fig. 2, the quick start capacitor E2 is connected to the micro-light solar panel through diodes D4 and D5, so that the micro-light solar panel continuously charges the quick start capacitor E2. It should be noted that, in this embodiment, the tantalum capacitor is 6.3V, and the micro-light solar panel is 5V, so there is no risk of overvoltage. However, for other different voltage conditions, the switch can be set to avoid the problem of overcharging.
Specifically, the first switch is specifically for:
when the voltage value of the super capacitor is smaller than a first set value, the connection between the low-light solar panel and the super capacitor is maintained;
and when the voltage value of the super capacitor is equal to a first set value, controlling the low-light solar panel and the super capacitor to be disconnected.
And the magnitude relation between the voltage value of the super capacitor and the first set value is determined based on the voltage detector.
Specifically, the voltage detector is specifically for:
acquiring a voltage value of the super capacitor; when the voltage of the super capacitor is equal to the first set value, the voltage detector outputs a high level to enable the first switch to be opened.
As shown in fig. 2, a source electrode of the first switch Q5 is connected to the micro-light solar panel through a diode D4, a gate electrode of the first switch Q5 is connected to a collector electrode of the triode Q6, and a drain electrode of the first switch Q5 is connected to the quick start capacitor E2 through diodes D7 and D6. The emitter of transistor Q6 is connected to the output pin of voltage detector U4. The input pin of the voltage detector U4 acquires the voltage value of the super capacitor E1, when the voltage detector detects that the voltage of the super capacitor is a first set value, the triode Q6 is cut off, the MOS tube Q5 is cut off, and the connection between the low-light-level solar panel and the super capacitor is disconnected.
The first set value is the rated voltage of the super capacitor.
Optionally, the micro-light solar power supply circuit provided in this embodiment further includes a second switch, where the second switch is connected to the super capacitor, and the second switch is used for:
when the voltage value of the load circuit is smaller than a second set value, the second switch disconnects the super capacitor from the load circuit.
In the actual use process, the condition of no illumination can appear, when the power supply voltage falls below the lowest voltage of the work of the load circuit, the load circuit can not work normally, but the super capacitor is also connected with the load circuit to keep electricity consumption. In order to avoid overdischarge of the supercapacitor, the present embodiment is configured to solve the above-mentioned problem by providing a second switch, i.e. to implement low-voltage protection.
The second set value is the minimum working voltage of the load circuit.
As shown in fig. 2, the drain of the second switch Q7 is connected to the drain of the first switch Q5, the source of the second switch Q7 is connected to the super capacitor E1, and the source of the second switch Q7 is connected to the control_io of the load circuit. When control_IO is high level, super capacitor E1 supplies power normally, and when control_IO is low level, super capacitor E1 is disconnected from the load circuit.
In one possible embodiment, the load circuit comprises an MCU unit, and control_io may be a Control IO of the BLE MCU.
In a specific load circuit shown in fig. 3a, the MCU unit is specifically configured as WNF173, and the working voltage of the load circuit is 1.8V-3.3V, then the second set value is 1.8V. Meanwhile, in order to solve the voltage difference of the super capacitor, the quick start capacitor and the load circuit, a voltage stabilizing chip U2 is further connected between the super capacitor and the quick start capacitor and between the super capacitor and the load circuit, so that the output voltage of the super capacitor and the quick start capacitor meets the requirement of the load circuit. The low-voltage protection is added, so that the electric quantity of the super capacitor E1 is not reduced too much under the condition that no illumination is available and the work of a load circuit is not met, the electric quantity can be stored faster when the next illumination arrives, and the circuit is enabled to be more quickly and stably.
Fig. 3b also shows a specific functional circuit connected to the MCU unit in the load circuit of this embodiment, and a specific connection manner is shown in fig. 3b, which is not described herein again.
In one embodiment, as shown in fig. 4, there is also provided a micro-optic solar power supply method, including:
s101, connecting a quick start capacitor and a super capacitor with a load circuit respectively; the super capacitor or the quick start capacitor is connected with the low-light solar panel to be charged;
s102, obtaining output voltage of a load circuit;
s103, when the output voltage of the load circuit is smaller than a second set value, the connection between the load circuit and the super capacitor is disconnected; otherwise, the connection between the load circuit and the super capacitor is maintained.
The micro-light solar power supply method and the micro-light solar power supply circuit provided by the embodiment of the application adopt the same invention conception, can obtain the same beneficial effects, and are not repeated here.
Optionally, the method further comprises:
obtaining the output voltage of the super capacitor;
when the output voltage of the super capacitor is smaller than a first set value, the connection between the low-light solar panel and the super capacitor is maintained; otherwise, disconnecting the low-light solar panel and the super capacitor.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (8)
1. A micro-optic solar power supply circuit, comprising:
the super capacitor is connected with the load circuit;
the rapid starting capacitor is connected with the load circuit;
the low-light solar panel is used for charging the rapid starting capacitor and the super capacitor; the quick start capacitor is connected with the low-light solar panel through the diodes D4 and D5, so that the low-light solar panel continuously charges the quick start capacitor;
the first switch is used for controlling the connection state between the super capacitor and the low-light solar panel;
the voltage detector is used for controlling the first switch according to the voltage of the super capacitor;
the device further comprises a second switch, wherein the second switch is connected with the super capacitor and is used for:
when the voltage value of the load circuit is smaller than a second set value, the second switch disconnects the super capacitor and the load circuit; the drain electrode of the second switch is connected with the drain electrode of the first switch, the source electrode of the second switch is connected with the super capacitor, and the source electrode of the second switch is connected with the control_IO of the load circuit; when control_IO is high level, the super capacitor supplies power normally, and when control_IO is low level, the super capacitor is disconnected from the load circuit.
2. The micro-optic solar power supply circuit according to claim 1, wherein the first switch is specifically configured to:
when the voltage value of the super capacitor is smaller than a first set value, the connection between the low-light solar panel and the super capacitor is maintained;
and when the voltage value of the super capacitor is equal to a first set value, controlling the low-light solar panel and the super capacitor to be disconnected.
3. The micro-light solar power supply circuit according to claim 2, wherein the first switch is a first MOS transistor, a source electrode of the first MOS transistor is connected to the micro-light solar panel, a gate electrode of the first MOS transistor is connected to a collector electrode of the triode Q6, and a drain electrode of the first MOS transistor is connected to a quick start capacitor.
4. The micro-light solar power supply circuit according to claim 1, wherein the second switch is a second MOS transistor, a drain electrode of the second MOS transistor is connected to the first switch, a source electrode of the second MOS transistor is connected to the super capacitor E1, and a gate electrode of the second MOS transistor is connected to the load circuit.
5. The micro-optic solar power supply circuit according to claim 2, wherein the voltage detector is specifically configured to:
acquiring a voltage value of the super capacitor;
when the voltage of the super capacitor is equal to the first set value, the voltage detector outputs a high level to turn off the first switch.
6. The micro-optic solar power supply circuit according to claim 1, wherein the fast start capacitor is a tantalum capacitor.
7. A method of low-light solar power supply, characterized in that it is based on any one of claims 1-6, comprising:
the quick start capacitor and the super capacitor are respectively connected with a load circuit; the super capacitor or the quick start capacitor is connected with the low-light solar panel to be charged;
obtaining the output voltage of a load circuit;
when the output voltage of the load circuit is smaller than a second set value, the connection between the load circuit and the super capacitor is disconnected;
and when the output voltage of the load circuit is not smaller than a second set value, connecting the load circuit and the super capacitor.
8. The method of claim 7, wherein the method further comprises:
obtaining the output voltage of the super capacitor;
when the output voltage of the super capacitor is smaller than a first set value, the connection between the low-light solar panel and the super capacitor is maintained; otherwise, disconnecting the low-light solar panel and the super capacitor.
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| CN202211613751.1A CN115800487B (en) | 2022-12-15 | 2022-12-15 | Low-light solar power supply circuit and power supply method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211613751.1A CN115800487B (en) | 2022-12-15 | 2022-12-15 | Low-light solar power supply circuit and power supply method |
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| CN115800487B true CN115800487B (en) | 2024-03-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638750A (en) * | 2015-02-09 | 2015-05-20 | 深圳市爱科赛科技股份有限公司 | Wind-solar complementary power supply system with micro energy collection function |
| CN111030081A (en) * | 2019-12-31 | 2020-04-17 | 清华大学 | Solar energy collection composite micro-energy system and super capacitor charging control method |
| CN112109354A (en) * | 2020-06-22 | 2020-12-22 | 山东圣德智能装备有限公司 | Servo high-energy screw press and working method thereof |
| CN214707273U (en) * | 2021-04-13 | 2021-11-12 | 昆明理工大学 | Solar energy storage discharge circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI357203B (en) * | 2007-08-08 | 2012-01-21 | Solar energy charging/discharging system |
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- 2022-12-15 CN CN202211613751.1A patent/CN115800487B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638750A (en) * | 2015-02-09 | 2015-05-20 | 深圳市爱科赛科技股份有限公司 | Wind-solar complementary power supply system with micro energy collection function |
| CN111030081A (en) * | 2019-12-31 | 2020-04-17 | 清华大学 | Solar energy collection composite micro-energy system and super capacitor charging control method |
| CN112109354A (en) * | 2020-06-22 | 2020-12-22 | 山东圣德智能装备有限公司 | Servo high-energy screw press and working method thereof |
| CN214707273U (en) * | 2021-04-13 | 2021-11-12 | 昆明理工大学 | Solar energy storage discharge circuit |
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