CN207251284U - Power supply unit and lighting system - Google Patents
Power supply unit and lighting system Download PDFInfo
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- CN207251284U CN207251284U CN201720678667.6U CN201720678667U CN207251284U CN 207251284 U CN207251284 U CN 207251284U CN 201720678667 U CN201720678667 U CN 201720678667U CN 207251284 U CN207251284 U CN 207251284U
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Abstract
The utility model discloses a kind of power supply unit and lighting system, wherein, power supply unit includes solar panels, storage battery, charge management circuit, control circuit and regulator circuit, the first input end interconnection of the cathode of solar panels, the input terminal of charge management circuit and regulator circuit, the second input terminal interconnection of the output terminal of charge management circuit, the cathode of storage battery and regulator circuit, the output terminal of regulator circuit and the power end of control circuit connect, and the first control terminal of control circuit and the controlled end of charge management circuit connect；Wherein, regulator circuit, for the electric energy of solar panels or storage battery output to be carried out voltage stabilizing processing, and the working power of output control circuit；Control circuit, for controlling the working status of charge management circuit, so that solar panels are charged by charge management circuit for storage battery.In the case of technical solutions of the utility model can realize storage battery 0V (low-voltage), solar panels can charge storage battery.
Description
Technical Field
The utility model relates to the field of lighting technology, in particular to power supply unit and lighting system.
Background
A conventional power supply apparatus is shown in fig. 1. The solar charging system comprises a solar panel, a charging management circuit, a storage battery, a control circuit and a voltage stabilizing circuit.
The solar panel is used for converting solar energy into electric energy and outputting the electric energy; the storage battery is used for storing electric energy output by the solar energy to supply power to the load; the voltage stabilizing circuit is used for stabilizing the electric energy output by the storage battery and outputting a working power supply of the control circuit so as to start the control circuit; the control circuit is used for controlling the power supply state of the charging management circuit so that the solar panel charges the storage battery through the charging management circuit.
In the power supply device, when the voltage of the storage battery is reduced to be insufficient to supply power to the control circuit, the voltage stabilizing circuit cannot output a working power supply of the control circuit, so that the control circuit cannot be started, and the solar panel cannot charge the storage battery through the charging management circuit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power supply unit aims at realizing charging under the battery low-voltage condition.
In order to achieve the above object, the present invention provides a power supply device, which comprises a solar panel, a storage battery, a charging management circuit, a control circuit and a voltage stabilizing circuit, wherein the positive electrode of the solar panel, the input end of the charging management circuit and the first input end of the voltage stabilizing circuit are interconnected, the output end of the charging management circuit, the positive electrode of the storage battery and the second input end of the voltage stabilizing circuit are interconnected, the output end of the voltage stabilizing circuit is connected to the power source end of the control circuit, and the first control end of the control circuit is connected to the controlled end of the charging management circuit; the voltage stabilizing circuit is used for performing voltage stabilizing treatment on the electric energy output by the solar panel or the storage battery and outputting a working power supply of the control circuit; the control circuit is used for controlling the working state of the charging management circuit so that the solar panel charges the storage battery through the charging management circuit.
Preferably, the voltage stabilizing circuit includes a first diode, a second diode, a voltage stabilizing diode, a first capacitor, a second capacitor and a first resistor, an anode of the first diode is a first input end of the voltage stabilizing circuit, a second end of the first diode is connected to a first end of the first resistor, a second end of the first resistor, a cathode of the second diode, a cathode of the voltage stabilizing diode, a first end of the first capacitor and a first end of the second capacitor are interconnected, a connection node thereof is an output end of the voltage stabilizing circuit, an anode of the second diode is a second input end of the voltage stabilizing circuit, and an anode of the voltage stabilizing diode, a second end of the first capacitor and a second end of the second capacitor are interconnected.
Preferably, the charging management circuit includes a third diode, a fourth diode, a second resistor, a third resistor, and a switch unit, a first end of the second resistor is connected to an input end of the switch unit, a connection node of the second resistor is an input end of the charging management circuit, an output end of the switch unit, an anode of the third diode, and an anode of the fourth diode are interconnected, a cathode of the third diode is connected to a cathode of the fourth diode, a connection node of the third diode is an output end of the power management circuit, a controlled end of the switch unit, a second end of the second resistor, and a first end of the third resistor are interconnected, and a second end of the third resistor is a controlled end of the charging management circuit.
Preferably, power supply unit still includes solar panel voltage acquisition circuit, solar panel voltage acquisition circuit's input with solar panel's anodal is connected, solar panel voltage acquisition circuit's output with control circuit's first input is connected.
Preferably, the solar panel voltage acquisition circuit includes third electric capacity, fourth resistance, fifth resistance, sixth resistance and seventh resistance, the first end of fourth resistance is solar panel voltage acquisition circuit's input, the second end of fourth resistance with the first end of fifth resistance is connected, the second end of fifth resistance the first end of sixth resistance the first end of seventh resistance reaches the first end interconnection of third capacitance, the second end of sixth resistance is solar panel voltage acquisition circuit's output, the second end of seventh resistance reaches the second end of third capacitance all grounds.
Preferably, the power supply device further comprises a battery voltage acquisition circuit, an input end of the battery voltage acquisition circuit is connected with the positive electrode of the storage battery, and an output end of the battery voltage acquisition circuit is connected with the second input end of the control circuit.
Preferably, the battery voltage acquisition circuit includes an eighth resistor, a ninth resistor, and a fourth capacitor, a first end of the eighth resistor is an input end of the battery voltage acquisition circuit, a second end of the eighth resistor, a first end of the ninth resistor, and a first end of the fourth capacitor are interconnected, a connection node thereof is an output end of the battery voltage acquisition circuit, and a second end of the ninth resistor and a second end of the fourth capacitor are both grounded.
Preferably, the control circuit includes a control chip, a power pin of the control chip is a power end of the control circuit, and a first control pin of the control chip is a first control end of the control circuit.
The utility model also provides a lighting system, including discharge management circuit and as above-mentioned power supply unit, discharge management circuit's input is connected with the positive pole of battery, discharge management circuit's output is used for exporting load supply voltage, discharge management circuit's controlled end is connected with control circuit's second control end, discharge management circuit's adjusted end with control circuit's adjustment end is connected; the power supply device comprises a solar panel, a storage battery, a charge management circuit, a control circuit and a voltage stabilizing circuit, wherein the anode of the solar panel, the input end of the charge management circuit and the first input end of the voltage stabilizing circuit are interconnected, the output end of the charge management circuit, the anode of the storage battery and the second input end of the voltage stabilizing circuit are interconnected, the output end of the voltage stabilizing circuit is connected with the power supply end of the control circuit, and the first control end of the control circuit is connected with the controlled end of the charge management circuit; the voltage stabilizing circuit is used for performing voltage stabilizing treatment on the electric energy output by the solar panel or the storage battery and outputting a working power supply of the control circuit; the control circuit is used for controlling the working state of the charging management circuit so that the solar panel charges the storage battery through the charging management circuit.
Preferably, the discharge management circuit includes a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a first transistor, a second transistor, and a third transistor, a first terminal of the tenth resistor, a first terminal of the eleventh resistor, a positive electrode of the load, and a positive electrode of the battery are interconnected, a second terminal of the tenth resistor, a second terminal of the twelfth resistor, and a controlled terminal of the first transistor are interconnected, a first terminal of the twelfth resistor is a controlled terminal of the discharge management circuit, a second terminal of the eleventh resistor is connected to an input terminal of the first transistor, an output terminal of the first transistor, a second terminal of the fifteenth resistor, a first terminal of the second transistor, and a first terminal of the third transistor are interconnected, a first terminal of the fifteenth resistor is connected to the positive electrode of the load, the controlled terminal of the second transistor, the second terminal of the thirteenth resistor, the first terminal of the fourteenth resistor, and the controlled terminal of the third transistor are interconnected, the first terminal of the thirteenth resistor is the adjusted terminal of the discharge management circuit, and the second terminal of the fourteenth resistor, the output terminal of the second transistor, and the output terminal of the third transistor are all grounded.
The utility model discloses technical scheme carries out steady voltage through the electric energy that adopts voltage stabilizing circuit to export solar panel or battery output and handles to output control circuit's working power supply, so that control circuit controls charge management circuit's operating condition, so that solar panel charges for the battery through charge management circuit. Therefore, under the low-voltage condition of the storage battery, the solar panel can provide an input power supply for the voltage stabilizing circuit, so that the voltage stabilizing circuit outputs a working power supply of the control circuit, and the solar panel charges the storage battery through the charging management circuit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a functional block diagram of a conventional power supply apparatus;
fig. 2 is a schematic diagram of functional modules of an embodiment of the power supply device of the present invention;
fig. 3 is a schematic circuit diagram of another embodiment of the power supply device of the present invention;
fig. 4 is a schematic diagram of functional modules of an embodiment of the lighting system of the present invention;
fig. 5 is a schematic circuit diagram of another embodiment of the illumination system of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the description relating to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a power supply unit, this power supply unit can realize that solar panel 10 charges for battery 30 under the battery 30 low pressure condition. Specifically, please refer to the following embodiments.
Referring to fig. 2, in an embodiment, the power supply device includes a solar panel 10, a storage battery 30, a charge management circuit 20, a control circuit 40 and a voltage stabilizing circuit 50, wherein an anode of the solar panel 10, an input terminal of the charge management circuit 20 and a first input terminal of the voltage stabilizing circuit 50 are interconnected, an output terminal of the charge management circuit 20, an anode of the storage battery 30 and a second input terminal of the voltage stabilizing circuit 50 are interconnected, an output terminal of the voltage stabilizing circuit 50 is connected to a power source terminal of the control circuit 40, and a first control terminal of the control circuit 40 is connected to a controlled terminal of the charge management circuit 20; the voltage stabilizing circuit 50 is used for performing voltage stabilizing processing on the electric energy output by the solar panel 10 or the storage battery 30 and outputting a working power supply of the control circuit 40; and the control circuit 40 is used for controlling the working state of the charging management circuit 20 so that the solar panel 10 charges the storage battery 30 through the charging management circuit 20.
Specifically, during the operation of the power supply device, as long as the voltage regulator circuit 50 can obtain the input power from the solar panel 10, the voltage regulator circuit 50 can output the operating power of the control circuit 40. The control circuit 40 is turned on and controls the operating state of the charge management circuit 20 so that the solar panel 10 charges the battery 30 through the charge management circuit 20. Thus, even if the voltage of the battery 30 is lowered to 0V, the voltage stabilizing circuit 50 can supply power to the control circuit 40, and the solar panel 10 can charge the battery 30 through the charge management circuit 20.
The utility model discloses technical scheme carries out steady voltage through the electric energy that adopts voltage stabilizing circuit 50 to export solar panel 10 or battery 30 to output control circuit 40's working power supply, so that control circuit 40 controls the operating condition of charge management circuit 20, so that solar panel 10 charges for battery 30 through charge management circuit 20. In this way, under the condition of low voltage of the battery 30, the solar panel 10 can provide the input power for the voltage stabilizing circuit 50, so that the voltage stabilizing circuit 50 outputs the working power of the control circuit 40, and the solar panel 10 charges the battery 30 through the charging management circuit 20.
Optionally, referring to fig. 3, in another embodiment, the voltage stabilizing circuit 50 includes a first diode D1, a second diode D2, a zener diode DZ, a first capacitor C1, a second capacitor C2, and a first resistor R1, an anode of the first diode D1 is a first input terminal of the voltage stabilizing circuit 50, a second terminal of the first diode D1 is connected to a first terminal of the first resistor R1, a second terminal of the first resistor R1, a cathode of the second diode D2, a cathode of the zener diode DZ, a first terminal of the first capacitor C1, and a first terminal of the second capacitor C2 are interconnected, a connection node of the first diode D3683 is an output terminal of the voltage stabilizing circuit 50, an anode of the second diode D2 is a second input terminal of the voltage stabilizing circuit 50, and an anode of the zener diode DZ, a second terminal of the first capacitor C1, and a second terminal of the second capacitor C2 are interconnected.
Specifically, in the working process of the voltage stabilizing circuit 50, the electric energy output by the solar panel 10 is output to the output end of the voltage stabilizing circuit 50 through the first diode D1; the electric energy output by the storage battery 30 is output to the output end of the voltage stabilizing circuit 50 through the second diode D2. The output voltage of the voltage regulator circuit 50 is equal to the regulated voltage of the zener diode DZ.
Optionally, referring to fig. 3, in another embodiment, the charge management circuit 20 includes a third diode D3, a fourth diode D4, a second resistor R2, a third resistor R3 and a switch unit 21, a first end of the second resistor R2 is connected to an input end of the switch unit 21, a connection node of the first end is an input end of the charge management circuit 20, an output end of the switch unit 21, an anode of the third diode D3 and an anode of the fourth diode D4 are interconnected, a cathode of the third diode D3 is connected to a cathode of the fourth diode D4, a connection node of the connection node is an output end of the power management circuit, a controlled end of the switch unit 21, a second end of the second resistor R2 and a first end of the third resistor R3 are interconnected, and a second end of the third resistor R3 is a controlled end of the charge management circuit 20.
Here, the switch unit 21 may be a switch transistor or a switch chip, which is not limited herein. Preferably, when the controlled terminal of the switching unit 21 receives a high level signal, the input terminal of the switching unit 21 is connected to the output terminal, and when the controlled terminal of the switching unit 21 receives a low level signal, the input terminal of the switching unit 21 is disconnected from the output terminal.
Specifically, during the operation of the charging management circuit 20, if the voltage at the second end of the third resistor R3 is at a high level, when the controlled end of the switch unit 21 receives the high level, the input end of the switch unit 21 is connected to the output end, and the electric energy output by the solar panel 10 is input to the storage battery 30 through the charging management circuit 20 to charge the storage battery 30. Throughout the process, the third diode D3 and the fourth diode D4 play a role of preventing reverse charging so as to prevent the electric energy output from the battery 30 from being input to the solar panel 10 through the charge management circuit 20.
Further, referring to fig. 3, in another embodiment, the power supply device further includes a solar panel 10 voltage collecting circuit, an input terminal of the solar panel 10 voltage collecting circuit is connected to the positive electrode of the solar panel 10, and an output terminal of the solar panel 10 voltage collecting circuit is connected to the first input terminal of the control circuit 40.
Here, the solar panel voltage collecting circuit 60 is configured to collect the output voltage of the solar panel 10 and output a corresponding collecting signal to the control circuit 40, so that the control circuit 40 controls the operating state of the charging management circuit 20 according to the output voltage of the solar panel 10.
It can be understood that in daytime, sunlight is sufficient, the output voltage of the solar panel 10 is relatively high, and the value corresponding to the acquisition signal received by the control circuit 40 is relatively large; at night, the sunlight is insufficient, the output voltage of the solar panel 10 is relatively low, and the value corresponding to the acquisition signal received by the control circuit 40 is relatively small. Thus, the control circuit 40 can determine day and night according to the acquisition signal output by the solar panel voltage acquisition circuit 60, and control the solar panel 10 to charge the storage battery 30 through the charging management circuit 20 in the daytime; at night, the storage battery 30 is controlled not to be charged. Thereby improving the charging efficiency of the storage battery 30 and prolonging the service life of the storage battery 30.
Optionally, referring to fig. 3, in another embodiment, the solar panel 10 voltage collecting circuit includes a third capacitor C3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7, a first end of the fourth resistor R4 is an input end of the solar panel 10 voltage collecting circuit, a second end of the fourth resistor R4 is connected to a first end of the fifth resistor R5, a second end of the fifth resistor R5, a first end of the sixth resistor R6, a first end of the seventh resistor R7 and a first end of the third capacitor C3 are interconnected, a second end of the sixth resistor R6 is an output end of the solar panel 10 voltage collecting circuit, and a second end of the seventh resistor R7 and a second end of the third capacitor C3 are both grounded.
Here, the fourth resistor R4, the fifth resistor R5 and the seventh resistor R7 form a series voltage dividing circuit, when the voltage at the first end of the fourth resistor R4 is greater than the charging start voltage, the voltage at the first end of the seventh resistor R7 is greater than a preset voltage dividing value, the value corresponding to the collecting signal output by the voltage collecting circuit of the solar panel 10 is greater than the charging start value, and the control circuit 40 controls the solar panel 10 to charge the storage battery 30 through the charging management circuit 20 according to the collecting signal. The sixth resistor R6 is used for converting the voltage signal into a current signal, and the third capacitor C3 is used for filtering.
Further, referring to fig. 3, in another embodiment, the power supply device further includes a battery voltage collecting circuit 70, an input terminal of the battery voltage collecting circuit 70 is connected to the positive electrode of the storage battery 30, and an output terminal of the battery voltage collecting circuit 70 is connected to a second input terminal of the control circuit 40.
Here, the battery voltage collecting circuit 70 is configured to collect the output voltage of the storage battery 30 and output a corresponding collecting signal to the control circuit 40, so that the control circuit 40 controls the operating state of the charge management circuit 20 according to the output voltage of the storage battery 30.
It can be understood that, the battery voltage collecting circuit 70 can control the solar panel 10 to stop charging the storage battery 30 through the charging management circuit 20 when the storage battery 30 is fully charged, so as to prevent the storage battery 30 from being overcharged, prolong the service life of the storage battery 30, and improve the reliability of the power supply device. And, when the electric quantity of the battery 30 is too low, the control circuit 40 controls the battery 30 to stop the external power supply.
Optionally, referring to fig. 3, in another embodiment, the battery voltage collecting circuit 70 includes an eighth resistor R8, a ninth resistor R9 and a fourth capacitor C4, a first end of the eighth resistor R8 is an input end BT of the battery voltage collecting circuit 70, a second end of the eighth resistor R8, a first end of the ninth resistor R9 and a first end of the fourth capacitor C4 are interconnected, a connection node thereof is an output end of the battery voltage collecting circuit 70, and a second end of the ninth resistor R9 and a second end of the fourth capacitor C4 are both grounded.
Here, the eighth resistor R8 and the ninth resistor R9 form a series voltage divider circuit. When the voltage at the first end of the eighth resistor R8 is greater than the preset high voltage threshold, the voltage at the first end of the ninth resistor R9 is also greater than the high preset threshold, the value corresponding to the collection signal output by the battery voltage collection circuit 70 is greater than the preset high threshold, and the control circuit 40 may control the solar panel 10 to stop charging the battery 30 through the charge management circuit 20 according to the collection signal. When the voltage at the first end of the eighth resistor R8 is greater than the preset low-voltage threshold, the voltage at the first end of the ninth resistor R9 is also greater than the low preset threshold, the value corresponding to the acquisition signal output by the battery voltage acquisition circuit 70 is smaller than the preset low threshold, and the control circuit 40 may control the battery 30 to stop supplying power to the outside according to the acquisition signal. The preset voltage threshold may be set according to the type of the battery or a driving voltage range required by the load.
Optionally, referring to fig. 3, in another embodiment, the control circuit 40 includes a control chip U, a power pin VCC of the control chip U is a power terminal of the control circuit 40, and a first control pin CT1 of the control chip U is a first control terminal of the control circuit 40.
It should be noted that the control chip U further includes a second control pin CT2, a first input pin AD1, a second input pin AD2, and a regulation pin PWM. The second control pin CT2 of the control chip U is a second control terminal of the control circuit 40, the first input pin AD1 of the control chip U is a first input terminal of the control circuit 40, the second input pin AD2 of the control chip U is a second input terminal of the control circuit 40, and the adjustment pin PWM of the control chip U is an adjustment terminal of the control circuit 40.
Correspondingly, the utility model also provides an illuminating system.
Referring to fig. 4, in an embodiment, the lighting system of the present invention includes a discharge management circuit 80 and the above power supply device, an input end of the discharge management circuit 80 is connected to the positive electrode of the battery 30, an output end of the discharge management circuit 80 is used for outputting a load power supply voltage, a controlled end of the discharge management circuit 80 is connected to a second control end of the control circuit 40, and an adjusted end of the discharge management circuit 80 is connected to an adjusting end of the control circuit 40.
Here, the power supply device includes a solar panel 10, a storage battery 30, a charge management circuit 20, a control circuit 40 and a voltage stabilizing circuit 50, wherein the anode of the solar panel 10, the input terminal of the charge management circuit 20 and the first input terminal of the voltage stabilizing circuit 50 are interconnected, the output terminal of the charge management circuit 20, the anode of the storage battery 30 and the second input terminal of the voltage stabilizing circuit 50 are interconnected, the output terminal of the voltage stabilizing circuit 50 is connected with the power supply terminal of the control circuit 40, and the first control terminal of the control circuit 40 is connected with the controlled terminal of the charge management circuit 20; the voltage stabilizing circuit 50 is used for performing voltage stabilizing processing on the electric energy output by the solar panel 10 or the storage battery 30 and outputting a working power supply of the control circuit 40; and the control circuit 40 is used for controlling the working state of the charging management circuit 20 so that the solar panel 10 charges the storage battery 30 through the charging management circuit 20.
Wherein the load may be an incandescent lamp, a halogen lamp, or the like. Here, the load is an LED lamp (a plurality of LED lamps connected in parallel as shown in fig. 5) as an example.
In particular, during operation of the lighting system: the control circuit 40 controls the on state of the discharge management circuit 80 to supply power to the load through the discharge management circuit 80, and controls the switching frequency of the discharge management circuit 80 to regulate the current flowing through the load.
Optionally, referring to fig. 5, in another embodiment, the discharge management circuit 80 includes a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a first transistor Q1, a second transistor Q2, and a third transistor Q3, a first end of the tenth resistor R10, a first end of the eleventh resistor R11, a positive electrode of the load, and a positive electrode of the battery 30 are interconnected, a second end of the tenth resistor R10, a second end of the twelfth resistor R12, and a controlled end of the first transistor Q1 are interconnected, a first end of the twelfth resistor R12 is the controlled end of the discharge management circuit 80, a second end of the eleventh resistor R11 is connected to the input end of the first transistor Q1, an output end of the first transistor Q1, a second end of the fifteenth resistor 46r 48, a first end of the second transistor Q5, a first end of the third transistor Q3, and a fifth end of the load are interconnected, the controlled terminal of the second transistor Q2, the second terminal of the thirteenth resistor R13, the first terminal of the fourteenth resistor R14, and the controlled terminal of the third transistor Q3 are interconnected, the first terminal of the thirteenth resistor R13 is the adjusted terminal of the discharge management circuit 80, and the second terminal of the fourteenth resistor R14, the output terminal of the second transistor Q2, and the output terminal of the third transistor Q3 are all grounded.
Here, the first transistor Q1, the second transistor Q2, and the third transistor Q3 will be described as P-MOS transistors, N-MOS transistors, and N-MOS transistors, respectively. The grid electrode is the controlled end, the drain electrode is the input end, and the source electrode is the output end, regardless of whether the P-MOS tube or the N-MOS tube.
Specifically, when the voltage falling on the first terminal of the twelfth resistor R12 is at a high level, the first transistor Q1 is turned off, and the current output from the power supply device is passed through the load, the second transistor Q2, and the third transistor Q3 to ground; when the voltage at the first terminal of the twelfth resistor R12 is at a low level, the first transistor Q1 is turned on, and the output current of the power supply device flows through the first transistor Q1, the second transistor Q2, and the third transistor Q3 to ground. In the whole process, the brightness of the LED lamp can be adjusted by adjusting the duty ratio of the conducting time of the second transistor Q2 and the third transistor Q3.
The working principle of the power supply device and the power supply system of the present invention is described below with reference to fig. 2 to 5:
first, the voltage stabilizing circuit 50 obtains an input power from the solar panel 10 or the battery 30, and performs voltage stabilization processing on the input power to output a working power of the control circuit 40, and the control circuit 40 is started.
Then, the acquisition circuit of solar panel 10 acquires the output voltage of solar panel 10 and outputs a corresponding acquisition signal to control circuit 40. When the value corresponding to the acquisition signal received by the first input terminal of the control circuit 40 is greater than the charge starting value, the control circuit 40 controls the solar panel 10 to charge the storage battery 30 through the charge management circuit 20.
Then, the battery voltage acquisition circuit 70 acquires the output voltage of the storage battery 30 and outputs a corresponding acquisition signal to the control circuit 40. When the value corresponding to the acquisition signal received by the second input terminal of the control circuit 40 is greater than the preset threshold voltage, the control circuit 40 controls the solar panel 10 to stop charging the battery 30 through the charging management circuit 20.
When the battery 30 has voltage output, the control circuit 40 controls the discharge management circuit 80 to be turned on, so that the power supply device supplies power to the load. In the whole process, the control circuit 40 can control the brightness of the LED lamp by adjusting the duty ratio of the on-time of the discharge management circuit 80; and, the control circuit 40 shuts down the power supply path of the load when detecting that the voltage of the battery 30 is too low.
The utility model discloses technical scheme has following beneficial effect:
(1) the voltage stabilizing circuit 50 obtains input power from both the solar panel 10 and the battery 30, so that the solar panel 10 can also charge the battery 30 through the charge management circuit 20 under the low voltage condition of the battery 30.
(2) The solar panel voltage acquisition circuit 60 is arranged, so that the control circuit 40 controls the solar panel 10 to charge the storage battery 30 through the charging management circuit 20 in the daytime, and the charging efficiency is improved.
(3) The battery voltage acquisition circuit 70 is arranged, so that the control circuit 40 controls the storage battery 30 to stop supplying power to the outside (or enter a sleep mode) when detecting that the electric quantity of the storage battery 30 is low, and the control circuit 40 controls the solar panel 10 to stop charging the storage battery 30 through the charging management circuit 20 when the storage battery 30 is fully charged, thereby prolonging the service life of the storage battery 30.
(4) The control circuit 40 can adjust the brightness of the LED lamp by changing the duty ratio of the turn-on time of the discharge management circuit 80, so as to realize PWM dimming with rich functions.
(5) The discharge management circuit 80 is connected in series with the load, and when the load is operated, the voltage applied across the load is close to the output voltage of the battery 30, and the power loss is small.
(6) The whole circuit does not comprise a boosting module and a voltage reducing module, is simple and efficient, and is convenient to maintain.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A power supply device is characterized by comprising a solar panel, a storage battery, a charging management circuit, a control circuit and a voltage stabilizing circuit, wherein the anode of the solar panel, the input end of the charging management circuit and the first input end of the voltage stabilizing circuit are interconnected, the output end of the charging management circuit, the anode of the storage battery and the second input end of the voltage stabilizing circuit are interconnected, the output end of the voltage stabilizing circuit is connected with the power supply end of the control circuit, and the first control end of the control circuit is connected with the controlled end of the charging management circuit; wherein,
the voltage stabilizing circuit is used for performing voltage stabilizing treatment on the electric energy output by the solar panel or the storage battery and outputting a working power supply of the control circuit;
the control circuit is used for controlling the working state of the charging management circuit so that the solar panel charges the storage battery through the charging management circuit.
2. The power supply device according to claim 1, wherein the voltage regulator circuit comprises a first diode, a second diode, a zener diode, a first capacitor, a second capacitor and a first resistor, wherein an anode of the first diode is a first input terminal of the voltage regulator circuit, a second terminal of the first diode is connected to a first terminal of the first resistor, a second terminal of the first resistor, a cathode of the second diode, a cathode of the zener diode, a first terminal of the first capacitor and a first terminal of the second capacitor are interconnected, a connection node thereof is an output terminal of the voltage regulator circuit, an anode of the second diode is a second input terminal of the voltage regulator circuit, and an anode of the zener diode, a second terminal of the first capacitor and a second terminal of the second capacitor are interconnected.
3. The power supply device according to claim 1, wherein the charge management circuit includes a third diode, a fourth diode, a second resistor, a third resistor, and a switch unit, a first terminal of the second resistor is connected to an input terminal of the switch unit, a connection node of the second resistor is an input terminal of the charge management circuit, an output terminal of the switch unit, an anode of the third diode, and an anode of the fourth diode are interconnected, a cathode of the third diode is connected to a cathode of the fourth diode, a connection node of the third diode is an output terminal of the power management circuit, a controlled terminal of the switch unit, a second terminal of the second resistor, and a first terminal of the third resistor are interconnected, and a second terminal of the third resistor is a controlled terminal of the charge management circuit.
4. The power supply device according to any one of claims 1-3, further comprising a solar panel voltage acquisition circuit, wherein an input of the solar panel voltage acquisition circuit is connected to the anode of the solar panel, and an output of the solar panel voltage acquisition circuit is connected to the first input of the control circuit.
5. The power supply device according to claim 4, wherein the solar panel voltage collecting circuit comprises a third capacitor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor, a first end of the fourth resistor is an input end of the solar panel voltage collecting circuit, a second end of the fourth resistor is connected with a first end of the fifth resistor, a second end of the fifth resistor, a first end of the sixth resistor, a first end of the seventh resistor and a first end of the third capacitor are interconnected, a second end of the sixth resistor is an output end of the solar panel voltage collecting circuit, and a second end of the seventh resistor and a second end of the third capacitor are both grounded.
6. The power supply device according to any one of claims 1 to 3, wherein the power supply device further comprises a battery voltage acquisition circuit, an input terminal of the battery voltage acquisition circuit is connected with the positive electrode of the storage battery, and an output terminal of the battery voltage acquisition circuit is connected with the second input terminal of the control circuit.
7. The power supply device according to claim 6, wherein the battery voltage collecting circuit comprises an eighth resistor, a ninth resistor and a fourth capacitor, a first terminal of the eighth resistor is an input terminal of the battery voltage collecting circuit, a second terminal of the eighth resistor, a first terminal of the ninth resistor and a first terminal of the fourth capacitor are interconnected, a connection node thereof is an output terminal of the battery voltage collecting circuit, and a second terminal of the ninth resistor and a second terminal of the fourth capacitor are both grounded.
8. The power supply device according to claim 1, wherein the control circuit comprises a control chip, a power pin of the control chip is a power end of the control circuit, and a first control pin of the control chip is a first control end of the control circuit.
9. A lighting system, comprising a discharge management circuit and the power supply apparatus according to any one of claims 1 to 8, wherein an input terminal of the discharge management circuit is connected to the positive electrode of the storage battery, an output terminal of the discharge management circuit is used for outputting a load supply voltage, a controlled terminal of the discharge management circuit is connected to the second control terminal of the control circuit, and an adjusted terminal of the discharge management circuit is connected to the adjusting terminal of the control circuit.
10. The lighting system according to claim 9, wherein the discharge management circuit comprises a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a first transistor, a second transistor and a third transistor, a first terminal of the tenth resistor, a first terminal of the eleventh resistor, a positive electrode of the load and a positive electrode of the battery are interconnected, a second terminal of the tenth resistor, a second terminal of the twelfth resistor and a controlled terminal of the first transistor are interconnected, a first terminal of the twelfth resistor is the controlled terminal of the discharge management circuit, a second terminal of the eleventh resistor is connected with the input terminal of the first transistor, an output terminal of the first transistor, a second terminal of the fifteenth resistor, a first terminal of the second transistor and a first terminal of the third transistor are interconnected, a first end of the fifteenth resistor is connected to the positive electrode of the load, a controlled end of the second transistor, a second end of the thirteenth resistor, a first end of the fourteenth resistor, and a controlled end of the third transistor are interconnected, the first end of the thirteenth resistor is an adjusted end of the discharge management circuit, and the second end of the fourteenth resistor, an output end of the second transistor, and an output end of the third transistor are all grounded.
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|---|---|---|---|
| CN201720678667.6U CN207251284U (en) | 2017-06-12 | 2017-06-12 | Power supply unit and lighting system |
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| CN201720678667.6U CN207251284U (en) | 2017-06-12 | 2017-06-12 | Power supply unit and lighting system |
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| CN207251284U true CN207251284U (en) | 2018-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114006454A (en) * | 2021-10-18 | 2022-02-01 | 南京能瑞自动化设备股份有限公司 | Power management circuit, communication module, electric energy meter and power supply method of communication module |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114006454A (en) * | 2021-10-18 | 2022-02-01 | 南京能瑞自动化设备股份有限公司 | Power management circuit, communication module, electric energy meter and power supply method of communication module |
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Effective date of registration: 20210218 Address after: 518000 Wutong street, Baoan District, Shenzhen, Guangdong, China. The 5 floor of 13A building, Taihua Indus Industrial Park Patentee after: Shenzhen Yuanyuan Intelligent Lighting Co.,Ltd. Address before: 518000 13A, 6-7F, Taihua Wutong Industrial Park, Baoan District Xixiang street, Shenzhen, Guangdong Patentee before: SOCREAT ELECTRONICS TECHNOLOGY Ltd. |
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