WO2018227965A1 - 供电装置和照明系统 - Google Patents

供电装置和照明系统 Download PDF

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Publication number
WO2018227965A1
WO2018227965A1 PCT/CN2018/072489 CN2018072489W WO2018227965A1 WO 2018227965 A1 WO2018227965 A1 WO 2018227965A1 CN 2018072489 W CN2018072489 W CN 2018072489W WO 2018227965 A1 WO2018227965 A1 WO 2018227965A1
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WO
WIPO (PCT)
Prior art keywords
circuit
resistor
solar panel
voltage
power supply
Prior art date
Application number
PCT/CN2018/072489
Other languages
English (en)
French (fr)
Inventor
尹振坤
项佰川
白俊武
李志伟
熊杰
Original Assignee
深圳源创智能照明有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳源创智能照明有限公司 filed Critical 深圳源创智能照明有限公司
Priority to US15/772,249 priority Critical patent/US20190140462A1/en
Publication of WO2018227965A1 publication Critical patent/WO2018227965A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection

Definitions

  • the present invention relates to the field of lighting technologies, and in particular, to a power supply device and a lighting system.
  • the existing power supply device is shown in Figure 1. Including solar panels, charging management circuits, batteries, control circuits and voltage regulator circuits.
  • the solar panel is used to convert the solar energy into electrical energy and output;
  • the storage battery is used for storing the electrical energy outputted by the solar energy to supply the load;
  • the voltage stabilizing circuit is used for voltage-regulating the output power of the battery and outputting the working power of the control circuit, so that The control circuit is turned on;
  • the control circuit is used to control the power supply state of the charge management circuit, so that the solar panel charges the battery through the charge management circuit.
  • the voltage stabilizing circuit cannot output the operating power of the control circuit, so that the control circuit cannot be turned on, thereby causing the solar panel to not charge the battery through the charging management circuit.
  • a primary object of the present invention is to provide a power supply device for achieving charging under low voltage conditions of a battery.
  • the power supply device comprises a solar panel, a battery, a charging management circuit, a control circuit and a voltage stabilizing circuit, an anode of the solar panel, an input end of the charging management circuit, and the voltage stabilizing circuit
  • the first input terminal is interconnected, an output end of the charge management circuit, a positive pole of the battery, and a second input end of the voltage stabilizing circuit are interconnected, and an output end of the voltage stabilizing circuit and a power supply of the control circuit
  • the first control end of the control circuit is connected to the controlled end of the charging management circuit; wherein the voltage stabilizing circuit is configured to voltage-regulate the output power of the solar panel or the battery, and And outputting the working power of the control circuit; the control circuit is configured to control an operating state of the charging management circuit, so that the solar panel charges the battery through the charging management circuit.
  • the voltage stabilizing circuit comprises a first diode, a second diode, a Zener diode, a first capacitor, a second capacitor and a first resistor, and an anode of the first diode is the stable a first input end of the voltage circuit, a second end of the first diode is coupled 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 Zener diode, a first end of the first capacitor, and a first end of the second capacitor are interconnected, and a connection node is an output end of the voltage stabilizing circuit, and the second diode
  • the anode of the tube is a second input of the voltage stabilizing circuit, and the anode of the Zener diode, the second end of the first capacitor, and the second end of the second capacitor are interconnected.
  • the charge management circuit includes a third diode, a fourth diode, a second resistor, a third resistor, and a switch unit, and the first end of the second resistor is connected to the input end of the switch unit
  • the connection node is an input end of the charge management circuit, an output end of the switch unit, an anode of the third diode, and an anode of the fourth diode are interconnected
  • the third diode a cathode of the tube is connected to a cathode of the fourth diode
  • a connection node is an output end of the power management circuit, a controlled end of the switch unit, a second end of the second resistor, and the first A first end of the three resistors is interconnected
  • a second end of the third resistor is a controlled end of the charge management circuit.
  • the power supply device further includes a solar panel voltage collecting circuit, an input end of the solar panel voltage collecting circuit is connected to an anode of the solar panel, an output end of the solar panel voltage collecting circuit and the control circuit The first input is connected.
  • the solar panel voltage collecting circuit comprises a third capacitor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor, wherein the first end of the fourth resistor is an input of the solar panel voltage collecting circuit
  • the second end of the fourth resistor is connected to the first end of the fifth resistor, the second end of the fifth resistor, the first end of the sixth resistor, and the seventh resistor
  • One end and the first end of the third capacitor are interconnected
  • the second end of the sixth resistor is an output end of the solar panel voltage collecting circuit, and the second end of the seventh resistor and the third end The second end of the capacitor is grounded.
  • the power supply device further includes a battery voltage collecting circuit, an input end of the battery voltage collecting circuit is connected to a positive pole of the battery, an output end of the battery voltage collecting circuit and a second input end of the control circuit connection.
  • the battery voltage collecting circuit comprises an eighth resistor, a ninth resistor and a fourth capacitor, wherein the first end of the eighth resistor is an input end of the battery voltage collecting circuit, and the second resistor is a second The first end of the ninth resistor and the first end of the fourth capacitor are interconnected, the connection node is an output end of the battery voltage collecting circuit, the second end of the ninth resistor, and the The second end of the fourth capacitor is grounded.
  • control circuit comprises a control chip, a power supply pin of the control chip is a power supply end of the control circuit, and a first control pin of the control chip is a first control end of the control circuit.
  • the invention also provides an illumination system comprising a discharge management circuit and a power supply device as described above, an input end of the discharge management circuit is connected to a positive pole of the battery, and an output end of the discharge management circuit is used for outputting a load power supply a voltage, a controlled end of the discharge management circuit is connected to a second control end of the control circuit, and an adjusted end of the discharge management circuit is connected to an adjustment end of the control circuit;
  • the power supply device comprises a solar panel, a battery, a charging management circuit, a control circuit, and a voltage stabilizing circuit, wherein a positive pole of the solar panel, an input end of the charging management circuit, and a first input end of the voltage stabilizing circuit are interconnected, the charging management circuit The output end, the positive pole of the 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 end of the control circuit, and the first control end of the control circuit Connected to the controlled end of the charging management circuit; wherein the voltage
  • 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 end of the tenth resistor, a first end of the eleventh resistor, a positive pole of the load, and a positive pole of the battery, a second end of the tenth resistor, the twelfth a second end of the resistor and a controlled end of the first transistor are interconnected, a first end of the twelfth resistor is a controlled end of the discharge management circuit, and a second end of the eleventh resistor is An input end of the first transistor is connected, an output end of the first transistor, a second end of the fifteenth resistor, a first end of the second transistor, and a first end of the third transistor Connecting, the first end of the fifteenth resistor is connected to the positive pole of the load, the controlled end of the second transistor, the second end of the thirteenth resistor, and the first of the fourteenth resistor
  • the terminal and the controlled terminal of the third transistor are interconnected, and the first end of the thirteenth resistor is the Power management circuit is adjusted second ends of the fourteenth resistor, the
  • the technical scheme of the invention adopts a voltage stabilizing circuit to perform voltage stabilization processing on the solar panel or the output power of the battery, and outputs the working power of the control circuit, so that the control circuit controls the working state of the charging management circuit to enable the solar panel to be charged.
  • the management circuit charges the battery.
  • the solar panel can provide input power to the voltage stabilizing circuit, so that the voltage stabilizing circuit outputs the working power of the control circuit, and the solar panel charges the battery through the charging management circuit.
  • FIG. 1 is a schematic diagram of functional modules of a conventional power supply device
  • FIG. 2 is a schematic diagram of functional modules of an embodiment of a power supply device according to the present invention.
  • FIG. 3 is a schematic structural diagram of a circuit of another embodiment of a power supply device according to the present invention.
  • FIG. 4 is a schematic diagram of functional modules of an embodiment of a lighting system of the present invention.
  • FIG. 5 is a schematic structural diagram of a circuit of another embodiment of the illumination system of the present invention.
  • first, second and the like in the present invention are only for the purpose of description, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.
  • the present invention provides a power supply device that can charge the battery 30 for the solar panel 10 under low voltage conditions of the battery 30. Specifically, please refer to the following embodiments.
  • the power supply device includes a solar panel 10, a battery 30, a charge management circuit 20, a control circuit 40, and a voltage stabilization circuit 50.
  • the anode of the solar panel 10, the input end of the charge management circuit 20, and the stability The first input end of the voltage circuit 50 is interconnected, the output end of the charge management circuit 20, the positive pole of the battery 30 and the second input end of the voltage stabilizing circuit 50 are interconnected, and the output end of the voltage stabilizing circuit 50 and the power end of the control circuit 40
  • the first control terminal of the control circuit 40 is connected to the controlled end of the charging management circuit 20; wherein the voltage stabilizing circuit 50 is configured to perform voltage stabilization processing on the solar panel 10 or the battery 30, and output the control circuit 40.
  • the operating power supply; the control circuit 40 is configured to control the operating state of the charging management circuit 20 to cause the solar panel 10 to charge the battery 30 through the charging management circuit 20.
  • the regulator circuit 50 can output the operating power of the control circuit 40 as long as the voltage stabilizing circuit 50 can obtain the input power from the solar panel 10 during the operation of the power supply device.
  • the control circuit 40 is turned on and controls the operating state of the charge management circuit 20 to cause the solar panel 10 to charge the battery 30 through the charge management circuit 20.
  • the voltage stabilizing circuit 50 can supply power to the control circuit 40, and the solar panel 10 can also charge the battery 30 through the charge management circuit 20.
  • the technical solution of the present invention performs voltage stabilization processing on the solar panel 10 or the battery 30 by using the voltage stabilizing circuit 50, and outputs the operating power of the control circuit 40, so that the control circuit 40 controls the working state of the charging management circuit 20.
  • the solar panel 10 is charged to the battery 30 through the charge management circuit 20.
  • the solar panel 10 can provide input power to the voltage stabilizing circuit 50, so that the voltage stabilizing circuit 50 outputs the operating power of the control circuit 40, and the solar panel 10 charges the battery 30 through the charging management circuit 20.
  • the voltage stabilizing circuit 50 includes a first diode D1, a second diode D2, a Zener diode DZ, a first capacitor C1, and a second capacitor C2.
  • the first resistor R1, the anode of the first diode D1 is the first input end of the voltage stabilizing circuit 50
  • the second end of the first diode D1 is connected to the first end of the first resistor R1, and the first resistor R1
  • the second end, the cathode of the second diode D2, the cathode of the Zener diode DZ, the first end of the first capacitor C1 and the first end of the second capacitor C2 are interconnected, and the connection node is the output of the voltage stabilizing circuit 50.
  • the anode of the second diode D2 is the second input end of the voltage stabilizing circuit 50.
  • the anode of the Zener diode DZ, the second end of the first capacitor C1 and the second end of the second capacitor C2 are interconnected.
  • the electric energy output by the solar panel 10 is output to the output end of the voltage stabilizing circuit 50 via the first diode D1; the electric energy output from the battery 30 is output to the second diode D2 to the steady state.
  • the output of voltage circuit 50 is equal to the voltage regulator of the Zener diode DZ.
  • the charging 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,
  • the first end of the two resistor R2 is connected to the input end of the switch unit 21, and the connection node is the input end of the charge management circuit 20, the output end of the switch unit 21, the anode of the third diode D3, and the fourth diode D4.
  • the anode is interconnected, the cathode of the third diode D3 is connected to the cathode of the fourth diode D4, the connection node is the output end of the power management circuit, the controlled end of the switching unit 21, and the second resistor R2 are second.
  • the first end of the third resistor R3 is interconnected, and the second end of the third resistor R3 is a controlled end of the charge management circuit 20.
  • the switch unit 21 can be selected as a switching transistor or a switch chip, which is not limited herein.
  • the input end of the switching unit 21 is in communication with the output end, and when the controlled end of the switching unit 21 receives the low level signal, the switching unit 21 The input is disconnected from the output.
  • the charging management circuit 20 if the voltage falling at the second end of the third resistor R3 is at a high level, when the controlled terminal of the switching unit 21 receives a high level, the input terminal and the output of the switching unit 21 The terminals are connected, and the electric energy output from the solar panel 10 is input to the battery 30 via the charging management circuit 20 to charge the battery 30.
  • the third diode D3 and the fourth diode D4 function as anti-backup to prevent the electric energy output from the battery 30 from being input to the solar panel 10 through the charging management circuit 20.
  • the power supply device further includes a solar panel 10 voltage collecting circuit, the input end of the solar panel 10 voltage collecting circuit is connected to the anode of the solar panel 10, and the solar panel 10 voltage collecting circuit is The output is coupled to a first input of control circuit 40.
  • the solar panel voltage collecting circuit 60 is configured to collect the output voltage of the solar panel 10, and output a corresponding acquisition signal to the control circuit 40, so that the control circuit 40 operates the charging management circuit 20 according to the output voltage of the solar panel 10. Take control.
  • the control circuit 40 can determine the day and night according to the collected signal output by the solar panel voltage collecting circuit 60, and control the solar panel 10 to charge the battery 30 through the charging management circuit 20 during the daytime; at night, the control battery 30 is not charged. Thereby, the charging efficiency of the battery 30 is improved, and the service life of the battery 30 is prolonged.
  • 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, and a fourth
  • the first end of the resistor R4 is the input end of the voltage collecting circuit of the solar panel 10
  • the second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5, and the sixth resistor R6
  • the first end, the first end of the seventh resistor R7 and the first end of the third capacitor C3 are interconnected
  • the second end of the sixth resistor R6 is the output end of the voltage collecting circuit of the solar panel 10
  • the second end of the seventh resistor R7 Both ends of the third capacitor C3 are grounded.
  • the fourth resistor R4, the fifth resistor R5, and the seventh resistor R7 constitute a series voltage dividing circuit.
  • the voltage is greater than the preset voltage dividing value, and the value corresponding to the collected signal outputted by the voltage collecting circuit of the solar panel 10 is greater than the charging starting value, and the control circuit 40 controls the solar panel 10 to charge the battery 30 through the charging management circuit 20 according to the collected signal.
  • the sixth resistor R6 is used to convert the voltage signal into a current signal, and the third capacitor C3 is used for filtering.
  • the power supply device further includes a battery voltage collecting circuit 70.
  • the input end of the battery voltage collecting circuit 70 is connected to the positive pole of the battery 30, and the output and control of the battery voltage collecting circuit 70 are controlled.
  • a second input of circuit 40 is coupled.
  • the battery voltage collecting circuit 70 is configured to collect the output voltage of the battery 30 and output a corresponding acquisition signal to the control circuit 40 to cause the control circuit 40 to control the operating state of the charging management circuit 20 according to the output voltage of the battery 30.
  • the battery voltage collecting circuit 70 can control the solar panel 10 to stop charging the battery 30 through the charging management circuit 20 when the battery 30 is full, thereby avoiding overcharging of the battery 30, prolonging the service life of the battery 30, and improving The reliability of the power supply unit. And, when the battery 30 is too low, the control circuit 40 controls the battery 30 to stop supplying power.
  • the battery voltage collecting circuit 70 includes an eighth resistor R8, a ninth resistor R9, and a fourth capacitor C4.
  • the first end of the eighth resistor R8 is a battery voltage collecting circuit.
  • the input end BT of the 70, the second end of the eighth resistor R8, the first end of the ninth resistor R9 and the first end of the fourth capacitor are interconnected, and the connection node is the output end of the battery voltage collecting circuit 70, and the ninth resistor
  • the second end of R9 and the second end of the fourth capacitor C4 are both grounded.
  • the eighth resistor R8 and the ninth resistor R9 constitute a series voltage dividing circuit.
  • the control circuit 40 can control the solar panel 10 to stop charging the battery 30 through the charging management circuit 20 according to the collected signal.
  • the control circuit 40 can control the battery 30 to stop external power supply according to the collected signal.
  • the preset voltage threshold can be set according to the battery model or the driving voltage range required by the load.
  • the control circuit 40 includes a control chip U.
  • the power supply pin VCC of the control chip U is a power terminal of the control circuit 40, and the first control pin CT1 of the control chip U is controlled. The first control terminal of circuit 40.
  • control chip U further includes a second control pin CT2, a first input pin AD1, a second input pin AD2, and an adjustment pin PWM.
  • the second control pin CT2 of the control chip U is the second control end of the control circuit 40.
  • the first input pin AD1 of the control chip U is the first input end of the control circuit 40, and the second input pin AD2 of the control chip U is controlled.
  • the adjustment pin PWM of the control chip U is the adjustment terminal of the control circuit 40.
  • the invention also proposes a lighting system.
  • the illumination system of the present invention includes a discharge management circuit 80 and a power supply device as described above.
  • the input of the discharge management circuit 80 is connected to the positive terminal of the battery 30, and the output of the discharge management circuit 80 is used.
  • the controlled end of the discharge management circuit 80 is connected to the second control terminal of the control circuit 40, and the regulated end of the discharge management circuit 80 is connected to the adjustment terminal of the control circuit 40.
  • the power supply device includes a solar panel 10, a battery 30, a charge management circuit 20, a control circuit 40, and a voltage stabilization circuit 50, an anode of the solar panel 10, an input terminal of the charge management circuit 20, and a first input terminal of the voltage stabilization circuit 50.
  • the interconnection, the output of the charge management circuit 20, the anode of the battery 30, and the second input of the voltage regulator circuit 50 are interconnected, and the output of the voltage regulator circuit 50 is connected to the power terminal of the control circuit 40, and the first of the control circuit 40
  • the control terminal is connected to the controlled end of the charging management circuit 20; wherein the voltage stabilizing circuit 50 is configured to perform voltage stabilization processing on the solar panel 10 or the battery 30, and output the operating power of the control circuit 40; the control circuit 40, It is used to control the operating state of the charge management circuit 20 to cause the solar panel 10 to charge the battery 30 through the charge management circuit 20.
  • the load may be an incandescent lamp, a halogen lamp or the like.
  • the load is an LED lamp (a plurality of LED lamps connected in parallel as shown in FIG. 5) will be described as an example.
  • the control circuit 40 controls the power supply device to supply power to the load through the discharge management circuit 80 by controlling the open state of the discharge management circuit 80, and realizes the flow of the load current by controlling the switching frequency of the discharge management circuit 80. Adjustment.
  • the discharge management circuit 80 includes a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, and a fourteenth resistor R14.
  • the fifteenth resistor R15, the first transistor Q1, the second transistor Q2, and the third transistor Q3, the first end of the tenth resistor R10, the first end of the eleventh resistor R11, the positive pole of the load, and the positive terminal of the battery 30 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.
  • the first end of the twelfth resistor R12 is a controlled end of the discharge management circuit 80.
  • the second end of the eleventh resistor R11 is connected to the input end of the first transistor Q1, the output end of the first transistor Q1, the second end of the fifteenth resistor R15, the first end of the second transistor Q2, and the third transistor Q3
  • the first end of the fifteenth resistor R15 is connected to the positive terminal of the load, the controlled end of the second transistor Q2, the second end of the thirteenth resistor R13, the first end of the fourteenth resistor, and
  • the controlled terminal of the third transistor Q3 is interconnected, and the first end of the thirteenth resistor R13 is modulated by the discharge management circuit 80.
  • Second ends of the fourteenth resistor R14, an output terminal an output terminal of the second transistor Q2 and the third transistor Q3 is grounded.
  • the first transistor Q1 is a P-MOS transistor
  • the second transistor Q2 is an N-MOS transistor
  • the third transistor Q3 is an N-MOS transistor as an example.
  • the gate is the controlled end
  • the drain is the input end
  • the source is the output end.
  • the first transistor Q1 when the voltage falling at the first end of the twelfth resistor R12 is at a high level, the first transistor Q1 is turned off, and the current output by the power supply device passes through the load, the second transistor Q2, and the third transistor Q3 to the ground;
  • the voltage of the first terminal of the two resistors R12 is a low level, the first transistor Q1 is turned on, and the output current of the power supply device passes through the first transistor Q1, the second transistor Q2, and the third transistor Q3 to the ground.
  • the brightness of the LED lamp can be adjusted by adjusting the duty ratio of the second transistor Q2 and the third transistor Q3 on time.
  • the voltage stabilizing circuit 50 obtains input power from the solar panel 10 or the battery 30, and performs voltage stabilization processing on the input power source to output the operating power of the control circuit 40, and the control circuit 40 is activated.
  • the solar panel 10 collects the circuit to collect the output voltage of the solar panel 10, and outputs a corresponding acquisition signal to the control circuit 40.
  • the control circuit 40 controls the solar panel 10 to charge the battery 30 through the charge management circuit 20.
  • the battery voltage collecting circuit 70 collects the output voltage of the battery 30 and outputs a corresponding acquisition signal to the control circuit 40.
  • the control circuit 40 controls the solar panel 10 to stop charging the battery 30 through the charging management circuit 20.
  • the control circuit 40 controls the discharge management circuit 80 to turn on, so that the power supply device supplies power to the load. Throughout the process, the control circuit 40 can control the brightness of the LED lamp by adjusting the duty cycle of the discharge management circuit 80 to open the time; and, when the voltage of the battery 30 is detected to be too low, the control circuit 40 turns off the power supply path of the load.
  • the voltage stabilizing circuit 50 simultaneously obtains input power from the solar panel 10 and the battery 30, so that the solar panel 10 can also charge the battery 30 through the charging management circuit 20 under the low voltage condition of the battery 30.
  • the solar panel voltage collecting circuit 60 is provided such that the control circuit 40 controls the solar panel 10 to charge the battery 30 through the charging management circuit 20 during the daytime to improve the charging efficiency.
  • the battery voltage collecting circuit 70 is provided such that the control circuit 40 controls the battery 30 to stop supplying power (or enters the sleep mode) when detecting that the battery 30 is low, and the control circuit 40 controls the solar panel 10 to stop when the battery 30 is full.
  • the battery 30 is charged by the charge management circuit 20 to extend the life of the battery 30.
  • the control circuit 40 can adjust the brightness of the LED lamp by changing the duty ratio of the opening time of the discharge management circuit 80 to realize PWM dimming, and the function is rich.
  • the discharge management circuit 80 is connected in series with the load. When the load is operated, the voltage applied across the load approaches the output voltage of the battery 30, and the power loss is small.
  • the whole circuit does not include the boost module and the buck module, which is simple and efficient, and easy to maintain.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

本发明公开一种供电装置和照明系统，其中，供电装置包括太阳能板、蓄电池、充电管理电路、控制电路和稳压电路，太阳能板的正极、充电管理电路的输入端及稳压电路的第一输入端互连，充电管理电路的输出端、蓄电池的正极及稳压电路的第二输入端互连，稳压电路的输出端与控制电路的电源端连接，控制电路的第一控制端与充电管理电路的受控端连接；其中，稳压电路，用于将太阳能板或者蓄电池输出的电能进行稳压处理，并输出控制电路的工作电源；控制电路，用于控制充电管理电路的工作状态，以使太阳能板通过充电管理电路为蓄电池充电。本发明技术方案能够实现蓄电池电压0V（低电压）情况下，太阳能板可以对蓄电池充电。

Description

供电装置和照明系统
技术领域
本发明涉及照明技术领域，特别涉及一种供电装置和照明系统。
背景技术
现有的供电装置如图1所示。包括太阳能板、充电管理电路、蓄电池、控制电路和稳压电路。
其中，太阳能板用于将太阳能转化成电能并输出；蓄电池用于存储太阳能输出的电能以为负载供电；稳压电路用于将蓄电池输出的电能进行稳压处理并输出控制电路的工作电源，以使控制电路开启；控制电路用于控制充电管理电路的供电状态，以使太阳能板通过充电管理电路为蓄电池充电。
在该供电装置中，当蓄电池电压降低到不足以为控制电路供电时，稳压电路不能输出控制电路的工作电源，使得控制电路不能开启，从而导致太阳能板不能通过充电管理电路为蓄电池充电。
发明内容
本发明的主要目的是提供一种供电装置，旨在实现蓄电池低电压条件下充电。
为实现上述目的，本发明提出的供电装置包括太阳能板、蓄电池、充电管理电路、控制电路和稳压电路，所述太阳能板的正极、所述充电管理电路的输入端及所述稳压电路的第一输入端互连，所述充电管理电路的输出端、所述蓄电池的正极及所述稳压电路的第二输入端互连，所述稳压电路的输出端与所述控制电路的电源端连接，所述控制电路的第一控制端与所述充电管理电路的受控端连接；其中，所述稳压电路，用于将所述太阳能板或者蓄电池输出的电能进行稳压处理，并输出所述控制电路的工作电源；所述控制电路，用于控制所述充电管理电路的工作状态，以使所述太阳能板通过所述充电管理电路为所述蓄电池充电。
优选地，所述稳压电路包括第一二极管、第二二极管、稳压二极管、第一电容、第二电容及第一电阻，所述第一二极管的阳极为所述稳压电路的第一输入端，所述第一二极管的第二端与所述第一电阻的第一端连接，所述第一电阻的第二端、所述第二二极管的阴极、所述稳压二极管的阴极、所述第一电容的第一端及所述第二电容的第一端互连，其连接节点为所述稳压电路的输出端，所述第二二极管的阳极为所述稳压电路的第二输入端，所述稳压二极管的阳极、所述第一电容的第二端及所述第二电容的第二端互连。
优选地，所述充电管理电路包括第三二极管、第四二极管、第二电阻、第三电阻及开关单元，所述第二电阻的第一端与所述开关单元的输入端连接，其连接节点为所述充电管理电路的输入端，所述开关单元的输出端、所述第三二极管的阳极及所述第四二极管的阳极互连，所述第三二极管的阴极与所述第四二极管的阴极连接，其连接节点为所述电源管理电路的输出端，所述开关单元的受控端、所述第二电阻的第二端及所述第三电阻的第一端互连，所述第三电阻的第二端为所述充电管理电路的受控端。
优选地，所述供电装置还包括太阳能板电压采集电路，所述太阳能板电压采集电路的输入端与所述太阳能板的正极连接，所述太阳能板电压采集电路的输出端与所述控制电路的第一输入端连接。
优选地，所述太阳能板电压采集电路包括第三电容、第四电阻、第五电阻、第六电阻及第七电阻，所述第四电阻的第一端为所述太阳能板电压采集电路的输入端，所述第四电阻的第二端与所述第五电阻的第一端连接，所述第五电阻的第二端、所述第六电阻的第一端、所述第七电阻的第一端及所述第三电容的第一端互连，所述第六电阻的第二端为所述太阳能板电压采集电路的输出端，所述第七电阻的第二端及所述第三电容的第二端均接地。
优选地，所述供电装置还包括蓄电池电压采集电路，所述蓄电池电压采集电路的输入端与所述蓄电池的正极连接，所述蓄电池电压采集电路的输出端与所述控制电路的第二输入端连接。
优选地，所述蓄电池电压采集电路包括第八电阻、第九电阻及第四电容，所述第八电阻的第一端为所述蓄电池电压采集电路的输入端，所述第八电阻的第二端、所述第九电阻的第一端及所述第四电容的第一端互连，其连接节点为所述蓄电池电压采集电路的输出端，所述第九电阻的第二端及所述第四电容的第二端均接地。
优选地，所述控制电路包括控制芯片，所述控制芯片的电源脚为所述控制电路的电源端，所述控制芯片的第一控制脚为所述控制电路的第一控制端。
本发明还提出一种照明系统，包括放电管理电路和如上所述的供电装置，所述放电管理电路的输入端与所述蓄电池的正极连接，所述放电管理电路的输出端用于输出负载供电电压，所述放电管理电路的受控端与所述控制电路的第二控制端连接，所述放电管理电路的被调整端与所述控制电路的调整端连接；在此，所述供电装置包括太阳能板、蓄电池、充电管理电路、控制电路和稳压电路，所述太阳能板的正极、所述充电管理电路的输入端及所述稳压电路的第一输入端互连，所述充电管理电路的输出端、所述蓄电池的正极及所述稳压电路的第二输入端互连，所述稳压电路的输出端与所述控制电路的电源端连接，所述控制电路的第一控制端与所述充电管理电路的受控端连接；其中，所述稳压电路，用于将所述太阳能板或者蓄电池输出的电能进行稳压处理，并输出所述控制电路的工作电源；所述控制电路，用于控制所述充电管理电路的工作状态，以使所述太阳能板通过所述充电管理电路为所述蓄电池充电。
优选地，所述放电管理电路包括第十电阻、第十一电阻、第十二电阻、第十三电阻、第十四电阻、第十五电阻、第一晶体管、第二晶体管及第三晶体管，所述第十电阻的第一端、所述第十一电阻的第一端、所述负载的正极及所述蓄电池的正极互连，所述第十电阻的第二端、所述第十二电阻的第二端及所述第一晶体管的受控端互连，所述第十二电阻的第一端为所述放电管理电路的受控端，所述第十一电阻的第二端与所述第一晶体管的输入端连接，所述第一晶体管的输出端、所述第十五电阻的第二端、所述第二晶体管的第一端及所述第三晶体管的第一端互连，所述第十五电阻的第一端与所述负载的正极连接，所述第二晶体管的受控端、所述第十三电阻的第二端、所述第十四电阻的第一端及所述第三晶体管的受控端互连，所述第十三电阻的第一端为所述放电管理电路的被调整端，所述第十四电阻的第二端、所述第二晶体管的输出端及所述第三晶体管的输出端均接地。
本发明技术方案通过采用稳压电路将太阳能板或者蓄电池输出的电能进行稳压处理，并输出控制电路的工作电源，以使控制电路对充电管理电路的工作状态进行控制，以使太阳能板通过充电管理电路为蓄电池充电。这样，在蓄电池低压条件下，太阳能板可以为稳压电路提供输入电源，使得稳压电路输出控制电路的工作电源，太阳能板通过充电管理电路为蓄电池充电。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为现有供电装置的功能模块示意图；
图2为本发明供电装置一实施例的功能模块示意图；
图3为本发明供电装置另一实施例的电路结构示意图；
图4为本发明照明系统一实施例的功能模块示意图；
图5为本发明照明系统另一实施例的电路结构示意图。
附图标号说明：
标号 名称 标号 名称 标号 名称
10 太阳能板 D1 第一二极管 R1 第一电阻
20 充电管理电路 D2 第二二极管 R2 第二电阻
30 蓄电池 D3 第三二极管 R3 第三电阻
40 控制电路 D4 第四二极管 R4 第四电阻
50 稳压电路 DZ 稳压二极管 R5 第五电阻
60 太阳能板电压采集电路 U 控制芯片 R6 第六电阻
70 蓄电池电压采集电路 C1 第一电容 R7 第七电阻
80 放电管理电路 C2 第二电容 R8 第八电阻
21 开关单元 C3 第三电容 R9 第九电阻
R13 第十三电阻 C4 第四电容 R10 第十电阻
R14 第十四电阻 Q1 第一晶体管 R11 第十一电阻
R15 第十五电阻 Q2 第二晶体管 R12 第十二电阻
Q3 第三晶体管
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，在本发明中涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种供电装置，该供电装置可实现蓄电池30低压条件下太阳能板10为蓄电池30充电。具体地，请参阅下述各实施例。
请参阅图2，在一实施例中，供电装置包括太阳能板10、蓄电池30、充电管理电路20、控制电路40和稳压电路50，太阳能板10的正极、充电管理电路20的输入端及稳压电路50的第一输入端互连，充电管理电路20的输出端、蓄电池30的正极及稳压电路50的第二输入端互连，稳压电路50的输出端与控制电路40的电源端连接，控制电路40的第一控制端与充电管理电路20的受控端连接；其中，稳压电路50，用于将太阳能板10或者蓄电池30输出的电能进行稳压处理，并输出控制电路40的工作电源；控制电路40，用于控制充电管理电路20的工作状态，以使太阳能板10通过充电管理电路20为蓄电池30充电。
具体地，在供电装置工作过程中，只要稳压电路50能够从太阳能板10获得输入电源，稳压电路50就能输出控制电路40的工作电源。控制电路40开启，并对充电管理电路20的工作状态进行控制，以使太阳能板10通过充电管理电路20为蓄电池30充电。这样，即使蓄电池30的电压降低到0V，稳压电路50也能为控制电路40供电，太阳能板10也能通过充电管理电路20为蓄电池30充电。
本发明技术方案通过采用稳压电路50将太阳能板10或者蓄电池30输出的电能进行稳压处理，并输出控制电路40的工作电源，以使控制电路40对充电管理电路20的工作状态进行控制，以使太阳能板10通过充电管理电路20为蓄电池30充电。这样，在蓄电池30低压条件下，太阳能板10可以为稳压电路50提供输入电源，使得稳压电路50输出控制电路40的工作电源，太阳能板10通过充电管理电路20为蓄电池30充电。
可选的，请参阅图3，在另一实施例中，稳压电路50包括第一二极管D1、第二二极管D2、稳压二极管DZ、第一电容C1、第二电容C2及第一电阻R1，第一二极管D1的阳极为稳压电路50的第一输入端，第一二极管D1的第二端与第一电阻R1的第一端连接，第一电阻R1的第二端、第二二极管D2的阴极、稳压二极管DZ的阴极、第一电容C1的第一端及第二电容C2的第一端互连，其连接节点为稳压电路50的输出端，第二二极管D2的阳极为稳压电路50的第二输入端，稳压二极管DZ的阳极、第一电容C1的第二端及第二电容C2的第二端互连。
具体地，在稳压电路50工作过程中，太阳能板10输出的电能经第一二极管D1输出至稳压电路50的输出端；蓄电池30输出的电能经第二二极管D2输出至稳压电路50的输出端。其中，稳压电路50的输出电压大小与稳压二极管DZ的稳压值相等。
可选的，请参阅图3，在另一实施例中，充电管理电路20包括第三二极管D3、第四二极管D4、第二电阻R2、第三电阻R3及开关单元21，第二电阻R2的第一端与开关单元21的输入端连接，其连接节点为充电管理电路20的输入端，开关单元21的输出端、第三二极管D3的阳极及第四二极管D4的阳极互连，第三二极管D3的阴极与第四二极管D4的阴极连接，其连接节点为电源管理电路的输出端，开关单元21的受控端、第二电阻R2的第二端及第三电阻R3的第一端互连，第三电阻R3的第二端为充电管理电路20的受控端。
在此，开关单元21可选为开关晶体管，也可选为开关芯片，此处不做限制。较佳地，当开关单元21的受控端接收到高电平信号时，开关单元21的输入端与输出端连通，当开关单元21的受控端接收到低电平信号时，开关单元21的输入端与输出端断开。
具体地，在充电管理电路20工作过程中，若落在第三电阻R3第二端的电压为高电平，则开关单元21的受控端接收到高电平时，开关单元21的输入端与输出端连通，太阳能板10输出的电能经充电管理电路20输入至蓄电池30，以为蓄电池30充电。整个过程中，第三二极管D3和第四二极管D4起到防反充作用，以避免蓄电池30输出的电能通过充电管理电路20输入至太阳能板10。
进一步地，请参阅图3，在另一实施例中，供电装置还包括太阳能板10电压采集电路，太阳能板10电压采集电路的输入端与太阳能板10的正极连接，太阳能板10电压采集电路的输出端与控制电路40的第一输入端连接。
在此，太阳能板电压采集电路60用于采集太阳能板10的输出电压，并输出对应的采集信号至控制电路40，以使控制电路40根据太阳能板10的输出电压对充电管理电路20的工作状态进行控制。
可以理解的是，白天时，阳光充足，太阳能板10的输出电压相对较高，控制电路40接收到的采集信号所对应的值相对较大；晚上时，阳光不足，太阳能板10的输出电压相对较低，控制电路40接收到的采集信号所对应的值相对较小。如此，控制电路40可以根据太阳能板电压采集电路60输出的采集信号判断白天黑夜，并在白天时，控制太阳能板10通过充电管理电路20为蓄电池30充电；在晚上时，控制蓄电池30不充电。从而提高蓄电池30的充电效率，延长蓄电池30的使用寿命。
可选的，请参阅图3，在另一实施例中，太阳能板10电压采集电路包括第三电容C3、第四电阻R4、第五电阻R5、第六电阻R6及第七电阻R7，第四电阻R4的第一端为太阳能板10电压采集电路的输入端，第四电阻R4的第二端与第五电阻R5的第一端连接，第五电阻R5的第二端、第六电阻R6的第一端、第七电阻R7的第一端及第三电容C3的第一端互连，第六电阻R6的第二端为太阳能板10电压采集电路的输出端，第七电阻R7的第二端及第三电容C3的第二端均接地。
在此，第四电阻R4、第五电阻R5及第七电阻R7构成串联分压电路，当落在第四电阻R4第一端的电压大于充电启动电压时，落在第七电阻R7第一端的电压大于预设分压值，太阳能板10电压采集电路输出的采集信号所对应的值大于充电启动值，控制电路40根据该采集信号控制太阳能板10通过充电管理电路20为蓄电池30充电。其中，第六电阻R6用于将电压信号转换为电流信号，第三电容C3用于滤波。
进一步地，请参阅图3，在另一实施例中，供电装置还包括蓄电池电压采集电路70，蓄电池电压采集电路70的输入端与蓄电池30的正极连接，蓄电池电压采集电路70的输出端与控制电路40的第二输入端连接。
在此，蓄电池电压采集电路70用于采集蓄电池30的输出电压，并输出对应的采集信号至控制电路40，以使控制电路40根据蓄电池30的输出电压对充电管理电路20的工作状态进行控制。
可以理解的是，蓄电池电压采集电路70，可以在蓄电池30充满时，控制电路40控制太阳能板10停止通过充电管理电路20为蓄电池30充电，从而避免蓄电池30过充，延长蓄电池30使用寿命，提高供电装置的可靠性。以及，在蓄电池30电量过低时，控制电路40控制蓄电池30停止对外供电。
可选的，请参阅图3，在另一实施例中，蓄电池电压采集电路70包括第八电阻R8、第九电阻R9及第四电容C4，第八电阻R8的第一端为蓄电池电压采集电路70的输入端BT，第八电阻R8的第二端、第九电阻R9的第一端及第四电容的第一端互连，其连接节点为蓄电池电压采集电路70的输出端，第九电阻R9的第二端及第四电容C4的第二端均接地。
在此，第八电阻R8与第九电阻R9构成串联分压电路。当落在第八电阻R8第一端的电压大于预设高压阈值时，落在第九电阻R9第一端的电压也大于高预设阈值，蓄电池电压采集电路70输出的采集信号所对应的值大于预设高阈值，控制电路40可根据该采集信号控制太阳能板10停止通过充电管理电路20为蓄电池30充电。当落在第八电阻R8第一端的电压大于预设低压阈值时，落在第九电阻R9第一端的电压也大于低预设阈值，蓄电池电压采集电路70输出的采集信号所对应的值小于预设低阈值，控制电路40可根据该采集信号控制蓄电池30停止对外供电。其中，预设电压阈值可根据电池型号，或者负载所需的驱动电压范围设置。
可选的，请参阅图3，在另一实施例中，控制电路40包括控制芯片U，控制芯片U的电源脚VCC为控制电路40的电源端，控制芯片U的第一控制脚CT1为控制电路40的第一控制端。
值得一提的是，控制芯片U还包括第二控制脚CT2、第一输入脚AD1、第二输入脚AD2及调整脚PWM。且控制芯片U的第二控制脚CT2为控制电路40的第二控制端，控制芯片U的第一输入脚AD1为控制电路40的第一输入端，控制芯片U的第二输入脚AD2为控制电路40的第二输入端，控制芯片U的调整脚PWM为控制电路40的调整端。
对应的，本发明还提出一种照明系统。
请参阅图4，在一实施例中，本发明提出的照明系统包括放电管理电路80和如上的供电装置，放电管理电路80的输入端与蓄电池30的正极连接，放电管理电路80的输出端用于输出负载供电电压，放电管理电路80的受控端与控制电路40的第二控制端连接，放电管理电路80的被调整端与控制电路40的调整端连接。
在此，供电装置包括太阳能板10、蓄电池30、充电管理电路20、控制电路40和稳压电路50，太阳能板10的正极、充电管理电路20的输入端及稳压电路50的第一输入端互连，充电管理电路20的输出端、蓄电池30的正极及稳压电路50的第二输入端互连，稳压电路50的输出端与控制电路40的电源端连接，控制电路40的第一控制端与充电管理电路20的受控端连接；其中，稳压电路50，用于将太阳能板10或者蓄电池30输出的电能进行稳压处理，并输出控制电路40的工作电源；控制电路40，用于控制充电管理电路20的工作状态，以使太阳能板10通过充电管理电路20为蓄电池30充电。
其中，负载可以是白炽灯，卤素灯等。此处以负载为LED灯（如图5所示的多个并联连接的LED灯）为例进行说明。
具体地，在照明系统工作过程中：控制电路40通过控制放电管理电路80的开启状态来实现供电装置通过放电管理电路80为负载供电，通过控制放电管理电路80的开关频率开实现流经负载电流的调节。
可选的，请参阅图5，在另一实施例中，放电管理电路80包括第十电阻R10、第十一电阻R11、第十二电阻R12、第十三电阻R13、第十四电阻R14、第十五电阻R15、第一晶体管Q1、第二晶体管Q2及第三晶体管Q3，第十电阻R10的第一端、第十一电阻R11的第一端、负载的正极及蓄电池30的正极互连，第十电阻R10的第二端、第十二电阻R12的第二端及第一晶体管Q1的受控端互连，第十二电阻R12的第一端为放电管理电路80的受控端，第十一电阻R11的第二端与第一晶体管Q1的输入端连接，第一晶体管Q1的输出端、第十五电阻R15的第二端、第二晶体管Q2的第一端及第三晶体管Q3的第一端互连，第十五电阻R15的第一端与负载的正极连接，第二晶体管Q2的受控端、第十三电阻R13的第二端、第十四电阻的第一端及第三晶体管Q3的受控端互连，第十三电阻R13的第一端为放电管理电路80的被调整端，第十四电阻R14的第二端、第二晶体管Q2的输出端及第三晶体管Q3的输出端均接地。
在此，以第一晶体管Q1为P-MOS管，第二晶体管Q2为N-MOS管，第三晶体管Q3为N-MOS管为例进行说明。其中，不论P-MOS管还是N-MOS管，栅极即受控端，漏极即输入端，源极即输出端。
具体地，当落在第十二电阻R12第一端的电压为高电平时，第一晶体管Q1截止，供电装置输出的电流经负载、第二晶体管Q2和第三晶体管Q3到地；当落在第十二电阻R12第一端的电压为低电平时，第一晶体管Q1导通，供电装置的输出电流经第一晶体管Q1、第二晶体管Q2和第三晶体管Q3到地。整个过程中，调节第二晶体管Q2和第三晶体管Q3导通时间的占空比，就可以调节LED灯的亮度。
以下，结合图2至图5，说明本发明供电装置及供电系统的工作原理：
首先，稳压电路50从太阳能板10或者蓄电池30获得输入电源，并对该输入电源进行稳压处理，以输出控制电路40的工作电源，控制电路40启动。
然后，太阳能板10采集电路采集太阳能板10的输出电压，并输出对应的采集信号至控制电路40。当控制电路40的第一输入端接收到的采集信号所对应的值大于充电启动值时，控制电路40控制太阳能板10通过充电管理电路20为蓄电池30充电。
接着，蓄电池电压采集电路70采集蓄电池30的输出电压，并输出对应的采集信号至控制电路40。当控制电路40的第二输入端接收到的采集信号所对应的值大于预设阈值电压时，控制电路40控制太阳能板10停止通过充电管理电路20为蓄电池30充电。
当蓄电池30有电压输出时，控制电路40控制放电管理电路80开启，以使供电装置为负载供电。整个过程中，控制电路40可通过调节放电管理电路80开启时间的占空比，以控制LED灯的亮度；以及，控制电路40在检测到蓄电池30电压过低时，关断负载的供电通路。
本发明技术方案具有如下有益效果：
（1）稳压电路50同时从太阳能板10和蓄电池30获得输入电源，使得在蓄电池30低压条件下，太阳能板10还能通过充电管理电路20为蓄电池30充电。
（2）设置太阳能板电压采集电路60，使得控制电路40在白天时控制太阳能板10通过充电管理电路20为蓄电池30充电，提高充电效率。
（3）设置蓄电池电压采集电路70，使得控制电路40在检测蓄电池30电量较低时控制蓄电池30停止对外供电（或者进入休眠模式），以及，控制电路40在蓄电池30充满时控制太阳能板10停止通过充电管理电路20为蓄电池30充电，延长蓄电池30使用寿命。
（4）控制电路40可通过改变放电管理电路80开启时间的占空比调节LED灯的亮度，实现PWM调光，功能丰富。
（5）放电管理电路80与负载串联连接，在负载工作时，施加在负载两端的电压接近蓄电池30的输出电压，功率损耗小。
（6）整个电路都不包括升压模块和降压模块，简易高效，维修方便。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (12)

  1. 一种供电装置，其特征在于，包括太阳能板、蓄电池、充电管理电路、控制电路和稳压电路，所述太阳能板的正极、所述充电管理电路的输入端及所述稳压电路的第一输入端互连，所述充电管理电路的输出端、所述蓄电池的正极及所述稳压电路的第二输入端互连，所述稳压电路的输出端与所述控制电路的电源端连接，所述控制电路的第一控制端与所述充电管理电路的受控端连接；其中，
    所述稳压电路，用于将所述太阳能板或者蓄电池输出的电能进行稳压处理，并输出所述控制电路的工作电源；
    所述控制电路，用于控制所述充电管理电路的工作状态，以使所述太阳能板通过所述充电管理电路为所述蓄电池充电。
  2. 如权利要求1所述的供电装置，其特征在于，所述供电装置还包括太阳能板电压采集电路，所述太阳能板电压采集电路的输入端与所述太阳能板的正极连接，所述太阳能板电压采集电路的输出端与所述控制电路的第一输入端连接。
  3. 如权利要求1所述的供电装置，其特征在于，所述稳压电路包括第一二极管、第二二极管、稳压二极管、第一电容、第二电容及第一电阻，所述第一二极管的阳极为所述稳压电路的第一输入端，所述第一二极管的第二端与所述第一电阻的第一端连接，所述第一电阻的第二端、所述第二二极管的阴极、所述稳压二极管的阴极、所述第一电容的第一端及所述第二电容的第一端互连，其连接节点为所述稳压电路的输出端，所述第二二极管的阳极为所述稳压电路的第二输入端，所述稳压二极管的阳极、所述第一电容的第二端及所述第二电容的第二端互连。
  4. 如权利要求3所述的供电装置，其特征在于，所述供电装置还包括太阳能板电压采集电路，所述太阳能板电压采集电路的输入端与所述太阳能板的正极连接，所述太阳能板电压采集电路的输出端与所述控制电路的第一输入端连接。
  5. 如权利要求1所述的供电装置，其特征在于，所述充电管理电路包括第三二极管、第四二极管、第二电阻、第三电阻及开关单元，所述第二电阻的第一端与所述开关单元的输入端连接，其连接节点为所述充电管理电路的输入端，所述开关单元的输出端、所述第三二极管的阳极及所述第四二极管的阳极互连，所述第三二极管的阴极与所述第四二极管的阴极连接，其连接节点为所述电源管理电路的输出端，所述开关单元的受控端、所述第二电阻的第二端及所述第三电阻的第一端互连，所述第三电阻的第二端为所述充电管理电路的受控端。
  6. 如权利要求5所述的供电装置，其特征在于，所述供电装置还包括太阳能板电压采集电路，所述太阳能板电压采集电路的输入端与所述太阳能板的正极连接，所述太阳能板电压采集电路的输出端与所述控制电路的第一输入端连接。
  7. 如权利要求6所述的供电装置，其特征在于，所述太阳能板电压采集电路包括第三电容、第四电阻、第五电阻、第六电阻及第七电阻，所述第四电阻的第一端为所述太阳能板电压采集电路的输入端，所述第四电阻的第二端与所述第五电阻的第一端连接，所述第五电阻的第二端、所述第六电阻的第一端、所述第七电阻的第一端及所述第三电容的第一端互连，所述第六电阻的第二端为所述太阳能板电压采集电路的输出端，所述第七电阻的第二端及所述第三电容的第二端均接地。
  8. 如权利要求1所述的供电装置，其特征在于，所述供电装置还包括蓄电池电压采集电路，所述蓄电池电压采集电路的输入端与所述蓄电池的正极连接，所述蓄电池电压采集电路的输出端与所述控制电路的第二输入端连接。
  9. 如权利要求8所述的供电装置，其特征在于，所述蓄电池电压采集电路包括第八电阻、第九电阻及第四电容，所述第八电阻的第一端为所述蓄电池电压采集电路的输入端，所述第八电阻的第二端、所述第九电阻的第一端及所述第四电容的第一端互连，其连接节点为所述蓄电池电压采集电路的输出端，所述第九电阻的第二端及所述第四电容的第二端均接地。
  10. 如权利要求1所述的供电装置，其特征在于，所述控制电路包括控制芯片，所述控制芯片的电源脚为所述控制电路的电源端，所述控制芯片的第一控制脚为所述控制电路的第一控制端。
  11. 一种照明系统，其特征在于，包括放电管理电路和如权利要求1-3、5以及7-10中任意一项所述的供电装置，所述放电管理电路的输入端与所述蓄电池的正极连接，所述放电管理电路的输出端用于输出负载供电电压，所述放电管理电路的受控端与所述控制电路的第二控制端连接，所述放电管理电路的被调整端与所述控制电路的调整端连接。
  12. 如权利要求11所述的照明系统，其特征在于，所述放电管理电路包括第十电阻、第十一电阻、第十二电阻、第十三电阻、第十四电阻、第十五电阻、第一晶体管、第二晶体管及第三晶体管，所述第十电阻的第一端、所述第十一电阻的第一端、所述负载的正极及所述蓄电池的正极互连，所述第十电阻的第二端、所述第十二电阻的第二端及所述第一晶体管的受控端互连，所述第十二电阻的第一端为所述放电管理电路的受控端，所述第十一电阻的第二端与所述第一晶体管的输入端连接，所述第一晶体管的输出端、所述第十五电阻的第二端、所述第二晶体管的第一端及所述第三晶体管的第一端互连，所述第十五电阻的第一端与所述负载的正极连接，所述第二晶体管的受控端、所述第十三电阻的第二端、所述第十四电阻的第一端及所述第三晶体管的受控端互连，所述第十三电阻的第一端为所述放电管理电路的被调整端，所述第十四电阻的第二端、所述第二晶体管的输出端及所述第三晶体管的输出端均接地。
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