CN215581808U - Solar street lamp power supply management control device - Google Patents

Abstract

The utility model provides a solar street lamp power supply management control device which comprises a charge and discharge control circuit, a storage battery, a photovoltaic panel, a first power supply conversion output circuit, a second power supply conversion output circuit and a third power supply conversion output circuit, wherein the charge and discharge control circuit is connected with the storage battery; the photovoltaic panel is connected with a charge and discharge control circuit, and the charge and discharge control circuit is connected with a storage battery; and the first power supply conversion output circuit, the second power supply conversion output circuit and the third power supply conversion output circuit are all connected with the storage battery. The utility model has the advantages that: can directly output the different voltage of three routes through first power supply conversion output circuit, second power supply conversion output circuit and third power supply conversion output circuit to satisfy the power supply demand of different loads, and need not to install power adapter and wiring alone again, consequently can avoid the circuit to overstock, the numerous problem of device, can bring very big convenience for the installation of equipment terminal on the wisdom lamp pole.

Description

Solar street lamp power supply management control device

[ technical field ] A method for producing a semiconductor device

The utility model relates to the technical field of street lamps, in particular to a power supply management control device for a solar street lamp.

[ background of the utility model ]

The solar street lamp is powered by a crystalline silicon solar cell, a maintenance-free valve-controlled sealed storage battery (a colloid battery) stores electric energy, and the ultra-high-brightness LED lamp is used as a light source and is controlled by an intelligent charging and discharging controller and used for replacing the traditional public power lighting street lamp. The solar street lamp does not need to be paved with cables, AC power supply and electricity charge, and adopts DC power supply and photosensitive control; the LED lamp has the advantages of good stability, long service life, high luminous efficiency, simple and convenient installation and maintenance, high safety performance, energy conservation, environmental protection, economy, practicability and the like.

With the progress of science and technology, intelligent lamp poles come into operation, and equipment terminals need to be mounted on the intelligent lamp poles, most of the equipment terminals need to adopt power adapters configured randomly by manufacturers, and the working voltages of the power adapters configured by different manufacturers are different; therefore, the existing equipment terminals cannot be directly applied to the solar photovoltaic control device, and a power adapter needs to be separately installed and wired, so that the smart lamp pole has the problems of being bulky in line and various in devices.

[ Utility model ] content

The utility model aims to provide a solar street lamp power supply management control device, and solves the problems that an existing equipment terminal cannot be directly applied to a solar photovoltaic control device, so that the line is too large and devices are too numerous.

The utility model is realized by the following steps: a solar street lamp power supply management control device comprises a charge and discharge control circuit, a storage battery, a photovoltaic panel, a first power supply conversion output circuit, a second power supply conversion output circuit and a third power supply conversion output circuit; the photovoltaic panel is connected with a charge and discharge control circuit, and the charge and discharge control circuit is connected with a storage battery; and the first power supply conversion output circuit, the second power supply conversion output circuit and the third power supply conversion output circuit are all connected with the storage battery.

Further, the device also comprises a main load enabling switch; and the first power supply conversion output circuit, the second power supply conversion output circuit and the third power supply conversion output circuit are all connected with the main load enabling switch.

Further, the first power supply conversion output circuit comprises a power switch circuit, a first comparison circuit and a 12V voltage output interface; the power switch circuit is connected with the storage battery; the first comparison circuit and the 12V voltage output interface are connected with the power switch circuit; the first comparison circuit is connected with a main load enable switch.

Further, the second power supply conversion output circuit comprises a first filter circuit, a first energy storage circuit, a feedback circuit, a 24V voltage output interface and a second comparison circuit; the first filter circuit is connected with the storage battery; the first energy storage circuit is connected with the first filter circuit; the feedback circuit and the 24V voltage output interface are connected with the first energy storage circuit; the second comparison circuit is connected with the feedback circuit; the second comparison circuit is connected with the main load enable switch.

Further, the third power supply conversion output circuit comprises a second filter circuit, a second energy storage circuit, a power conversion circuit, a voltage regulation feedback circuit, a 5-48V voltage output interface and a third comparison circuit; the second filter circuit is connected with the storage battery; the second energy storage circuit is connected with the second filter circuit; the power conversion circuit is connected with the second energy storage circuit; the voltage regulation feedback circuit is connected with the power conversion circuit; the third comparison circuit is connected with the voltage regulation feedback circuit; the power conversion circuit and the voltage regulation feedback circuit are connected with a 5-48V voltage output interface; the third comparison circuit is connected with the main load enable switch.

Further, the power switch circuit comprises a power switch Q1, a driving transistor Q4, a resistor R10 and a resistor R23; the D pole of the power switch Q1 is connected with a 12V voltage output interface, the S pole of the power switch Q1 is connected with a storage battery, and the G pole of the power switch Q1 is connected with the c pole of the driving triode Q4; one end of the resistor R10 is connected with the S pole of the power switch Q1, and the other end of the resistor R10 is connected with the G pole of the power switch Q1; the b pole of the driving triode Q4 is connected with the first comparison circuit, one end of the resistor R23 is connected with the b pole of the driving triode Q4, and the e pole of the driving triode Q4 and the other end of the resistor R23 are grounded.

Further, the first energy storage circuit comprises an energy storage inductor L3, an energy storage control chip U2, a rectifier diode D6, a driving triode Q2, a resistor R11, a resistor R15, a resistor R17, a resistor R20 and a resistor R24; one end of the energy storage control chip U2 and one end of the energy storage inductor L3 are connected with the first filter circuit; the other end of the energy storage inductor L3 is connected with a 24V voltage output interface through a rectifier diode D6; the D pole of the driving triode Q2 is connected with the other end of the energy storage inductor L3, the G pole of the driving triode Q2 is respectively connected with one ends of a resistor R11 and a resistor R15, the other end of the resistor R11 is connected with an energy storage control chip U2, and the other end of the resistor R15 and the S pole of the driving triode Q2 are grounded; one ends of the resistor R17, the resistor R20 and the resistor R24 are all connected with the energy storage control chip U2, the other end of the resistor R17 is connected with the second comparison circuit, and the other ends of the resistor R20 and the resistor R24 are grounded;

the feedback circuit comprises a resistor R19 and a resistor R19-1, one end of each of the resistor R19 and the resistor R19-1 is connected with the energy storage control chip U2, the other end of the resistor R19 is connected with the output end of the rectifier diode D6, and the other end of the resistor R19-1 is grounded.

Further, the second energy storage circuit comprises an energy storage inductor L1 and an energy storage control chip U10; the VIN pin of the energy storage control chip U10 and one end of an energy storage inductor L1 are both connected with a second filter circuit, and the other end of the energy storage inductor L1 is connected with the SW pin of the energy storage control chip U10;

the power conversion circuit comprises an energy storage inductor L2, a capacitor C4, a diode D1, a capacitor C1, a capacitor C2 and a capacitor C3; one end of the capacitor C4 is connected with a SW pin of the energy storage control chip U10, the other end of the capacitor C4 and the input end of the diode D1 are both connected with one end of an energy storage inductor L2, and the other end of the energy storage inductor L2 is grounded; one ends of the capacitor C1, the capacitor C2 and the capacitor C3 are all connected with the output end of the diode D1, and the other ends of the capacitor C1, the capacitor C2 and the capacitor C3 are all grounded;

the voltage regulating feedback circuit comprises a resistor R8 and an adjustable resistor R9; one ends of the resistor R8 and the adjustable resistor R9 are connected with an FB pin of the energy storage control chip U10, the other end of the resistor R8 is connected with the output end of the diode D1, and the other end of the adjustable resistor R9 is grounded.

Further, the charging and discharging control circuit comprises a charging and discharging chip U6, a capacitor C25, a capacitor C24, a capacitor C26, a MOS transistor Q6, an anti-reflux diode D7, a freewheeling diode D9 and a sampling resistor R25;

one end of the capacitor C25, one end of the capacitor C24, one end of the capacitor C26 and the S electrode of the MOS transistor Q6 are connected with the photovoltaic panel, the other ends of the capacitor C25 and the capacitor C24 are grounded, one end of the capacitor C24 is connected with the charge-discharge chip U6, and the other end of the capacitor C26 is connected with the charge-discharge chip U6; the G pole of the MOS tube Q6 is connected with the charging and discharging chip U6, and the D pole of the MOS tube Q6 is connected with one end of the anti-reflux diode D7; one end of the freewheeling diode D9 is grounded, the other ends of the anti-reflux diode D7 and the freewheeling diode D9 are connected with the sampling resistor R25, and the sampling resistor R25 is connected with the storage battery.

Further, the LED lamp also comprises a light illumination collecting circuit and an LED discharging circuit;

the illuminance acquisition circuit is connected with the photovoltaic panel; the LED discharge circuit is connected with the illuminance acquisition circuit; the LED discharge circuit is connected with the charge-discharge control circuit.

Further, the device also comprises a state indicating circuit; and the state indicating circuit is connected with the charge and discharge control circuit.

The utility model has the advantages that: 1. through directly having integrated first power supply conversion output circuit in solar street lamp power supply management controlling means, second power supply conversion output circuit and third power supply conversion output circuit, make at concrete during operation, can be through first power supply conversion output circuit, the direct different voltages of output three routes of second power supply conversion output circuit and third power supply conversion output circuit, in order to satisfy the power supply demand of different loads, and need not to install power adapter and wiring alone again, consequently, can avoid the circuit to be bloated, the problem of device is numerous, can bring very big convenience for the installation of equipment terminal on the wisdom lamp pole. 2. The main load enabling switch is arranged, and any one of the first power supply conversion output circuit, the second power supply conversion output circuit and the third power supply conversion output circuit can be switched and gated to output through the main load enabling switch, so that when the power supply switching device is used specifically, the power supply of the secondary load can be conveniently cut off according to the power utilization priority level of the load, and the power supply duration of the main load is prolonged.

[ description of the drawings ]

The utility model will be further described with reference to the following examples with reference to the accompanying drawings.

FIG. 1 is a schematic circuit block diagram of a power supply management control device of a solar street lamp according to the present invention;

FIG. 2 is a functional block diagram of a first power conversion output circuit of the present invention;

FIG. 3 is a functional block diagram of a second power conversion output circuit of the present invention;

FIG. 4 is a functional block diagram of a third power conversion output circuit of the present invention;

FIG. 5 is a specific circuit diagram of the charge and discharge control circuit according to the present invention;

FIG. 6 is a specific circuit diagram of the LED discharge circuit of the present invention;

fig. 7 is a specific circuit diagram of a first power conversion output circuit in the present invention;

fig. 8 is a specific circuit diagram of a second power supply conversion output circuit in the present invention;

fig. 9 is a specific circuit diagram of a third power supply conversion output circuit in the present invention;

FIG. 10 is a specific circuit diagram of the illuminance acquisition circuit according to the present invention;

FIG. 11 is a detailed circuit diagram of the main load enable switch of the present invention;

FIG. 12 is a detailed circuit diagram of the battery voltage sampling circuit of the present invention;

fig. 13 is a specific circuit diagram of the reference voltage sampling circuit in the present invention.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

Referring to fig. 1 to 13, the power supply management and control device for a solar street lamp of the present invention includes a charge and discharge control circuit 1, a storage battery 2, a photovoltaic panel 3, a first power supply conversion output circuit 4, a second power supply conversion output circuit 5, and a third power supply conversion output circuit 6; the photovoltaic panel 3 is connected with a charge and discharge control circuit 1, and the charge and discharge control circuit 1 is connected with a storage battery 2; the first power supply conversion output circuit 4, the second power supply conversion output circuit 5 and the third power supply conversion output circuit 6 are all connected with the storage battery 2. When the solar photovoltaic charging system works, the charging and discharging control circuit 1 controls the photovoltaic panel 3 to charge the storage battery 2, so that electric energy is stored; the charging and discharging control circuit 1 controls the storage battery 2 to supply power to the first power supply conversion output circuit 4, the second power supply conversion output circuit 5 and the third power supply conversion output circuit 6, so that three paths of different voltages are output, and the power supply requirements of various loads (namely equipment terminals) are met.

In the technical scheme of the utility model, the first power supply conversion output circuit 4, the second power supply conversion output circuit 5 and the third power supply conversion output circuit 6 are directly integrated in the power supply management control device of the solar street lamp, so that three paths of different voltages can be directly output through the first power supply conversion output circuit 4, the second power supply conversion output circuit 5 and the third power supply conversion output circuit 6 during specific work, the power supply requirements of different loads are met, and a power adapter and wiring do not need to be independently installed, so that the problems of line bulkiness and multiple devices can be avoided, and great convenience can be brought to installation of equipment terminals on a smart lamp pole.

In the utility model, the power supply system further comprises a main load enable switch 7, and the first power supply conversion output circuit 4, the second power supply conversion output circuit 5 and the third power supply conversion output circuit 6 are all connected with the main load enable switch 7. When the power supply switching device works, any one of the first power supply conversion output circuit 4, the second power supply conversion output circuit 5 and the third power supply conversion output circuit 6 can be switched and gated to output through the main load enabling switch 7, so that when the power supply switching device is used specifically, the power supply of a secondary load can be conveniently cut off according to the power utilization priority level of the load, and the power supply duration of the main load is prolonged.

In the present invention, the first power supply conversion output circuit 4 includes a power switch circuit 41, a first comparison circuit 42 and a 12V voltage output interface 43; the power switch circuit 41 is connected with the storage battery 2; the first comparison circuit 42 and the 12V voltage output interface 43 are both connected with the power switch circuit 41; the first comparison circuit 42 is connected to the main load enable switch 7. When the power supply works, the first comparison circuit 42 compares the voltage of the storage battery 2 with the reference voltage, and when the voltage of the storage battery 2 is higher than the reference voltage, the power switch circuit 41 outputs 12V direct current to the 12V voltage output interface 43, so that a load can be directly connected with the 12V voltage output interface 43 for power supply; when the main load enable switch 7 turns on the first power supply conversion output circuit 4, 12V is indicated as the main load power supply, and the 12V voltage output interface 43 always outputs 12V direct current to preferentially supply power to the main load.

In the present invention, the second power supply conversion output circuit 5 includes a first filter circuit 51, a first tank circuit 52, a feedback circuit 53, a 24V voltage output interface 54 and a second comparison circuit 55; the first filter circuit 51 is connected with the storage battery 2; the first tank circuit 52 is connected with the first filter circuit 51; the feedback circuit 53 and the 24V voltage output interface 54 are both connected with the first energy storage circuit 52; the second comparison circuit 55 is connected with the feedback circuit 53; the second comparator circuit 55 is connected to the main load enable switch 7. When the voltage of the storage battery 2 is higher than the reference voltage, the first energy storage circuit 52 stores energy and outputs 24V direct current to the 24V voltage output interface 54, so that the equipment terminal can be directly connected with the 24V voltage output interface 54 for supplying power. When the main load enable switch 7 turns on the second power supply conversion output circuit 5, it indicates that 24V is the main load power supply, and at this time, the 24V voltage output interface 54 keeps outputting 24V dc power all the time, so as to preferentially supply power to the main load.

In the utility model, the third power supply conversion output circuit 6 comprises a second filter circuit 61, a second energy storage circuit 62, a power conversion circuit 63, a voltage regulation feedback circuit 64, a 5-48V voltage output interface 65 and a third comparison circuit 66; the second filter circuit 61 is connected with the storage battery 2; the second tank circuit 62 is connected with the second filter circuit 61; the power conversion circuit 63 is connected with the second energy storage circuit 62; the voltage regulation feedback circuit 64 is connected with the power conversion circuit 63; the third comparison circuit 66 is connected with the voltage regulation feedback circuit 64; the power conversion circuit 63 and the voltage regulation feedback circuit are both connected with a 5-48V voltage output interface; the third comparison circuit is connected with the main load enable switch. When the voltage of the storage battery 2 is higher than the reference voltage, the second energy storage circuit 62, the power conversion circuit 63 and the voltage regulation feedback circuit 64 are matched to output 5-48V direct current to the 5-48V voltage output interface 65, so that the equipment terminal can be directly connected with the 5-48V voltage output interface 65 for power supply; when the third power supply conversion output circuit 6 is switched on by the main load enable switch 7, 5-48V is represented as the main load power supply, and the 5-48V voltage output interface 65 always outputs 5-48V direct current to preferentially supply power to the main load.

In the first power supply conversion output circuit 4 of the present invention, the power switch circuit 41 includes a power switch Q1, a driving transistor Q4, a resistor R10, and a resistor R23; the resistor R10 is a bias resistor, and can cut off the power switch Q1 when the driving triode Q4 is turned off; the resistor R23 is a pull-down resistor; the D pole of the power switch Q1 is connected with the 12V voltage output interface 43, the S pole of the power switch Q1 is connected with the storage battery 2, and the G pole of the power switch Q1 is connected with the c pole of the driving triode Q4; one end of the resistor R10 is connected with the S pole of the power switch Q1, and the other end of the resistor R10 is connected with the G pole of the power switch Q1; the b pole of the driving triode Q4 is connected with the first comparison circuit 42, one end of the resistor R23 is connected with the b pole of the driving triode Q4, and the e pole of the driving triode Q4 and the other end of the resistor R23 are grounded; a capacitor C14 is also arranged between the S pole of the power switch Q1 and the storage battery 2, and the capacitor C14 plays a role in filtering;

the first comparison circuit 42 comprises a comparator U1B, the negative input end of the comparator U1B is connected with the reference voltage sampling circuit 44, and the positive input end of the comparator U1B is connected with the storage battery 2 through a first battery voltage sampling circuit 45. The reference voltage sampling circuit 44 consists of a resistor R4 and a diode D2 and is used for providing a reference voltage of 1.25V; the first battery voltage sampling circuit 45 is composed of a resistor R1, a resistor R5, and a capacitor C5, and is configured to sample the voltage of the storage battery 2. The main load enable switch 7 includes a diode D3, a diode D4, and a diode D5 arranged in parallel, the diode D3 is connected to the first comparison circuit 42, the diode D4 is connected to the second comparison circuit 55, and the diode D5 is connected to the third comparison circuit 66.

When the first power supply conversion output circuit 4 works specifically, when the voltage of the storage battery 2 (namely, the battery voltage 1) is higher than the reference voltage, the comparator U1B outputs a high level, and the potential of the Q1 is pulled down after the Q4 is conducted, so that the Q1 is conducted to output a 12Vdc voltage to supply power to a load; when the main load enable switch 7 is switched to 12EN, indicating that 12V is the main load power supply, the battery voltage 1 will be forced to be pulled high, at this time, the potential of the non-inverting terminal of the comparator U1B is pulled high, the comparator U1B always outputs high level, that is, 12Vdc is set as the main load power supply, and the voltage of the storage battery 2 is preferentially used.

In the second power conversion output circuit 5 of the present invention, the first energy storage circuit 52 includes an energy storage inductor L3, an energy storage control chip U2, a rectifier diode D6, a driving transistor Q2, a resistor R11, a resistor R15, a resistor R17, a resistor R20, and a resistor R24; wherein, the resistor R24 is a fixed on-time adjusting resistor; the resistor R20 is a pull-down resistor and is used for preventing the energy storage control chip U2 from misoperation; the resistor R17 is a coupling resistor; the resistor R11 and the resistor R15 are driving resistors; one end of the energy storage control chip U2 and one end of the energy storage inductor L3 are connected with the first filter circuit 51; the other end of the energy storage inductor L3 is connected with the 24V voltage output interface 54 through a rectifier diode D6; the D pole of the driving triode Q2 is connected with the other end of the energy storage inductor L3, the G pole of the driving triode Q2 is respectively connected with one ends of a resistor R11 and a resistor R15, the other end of the resistor R11 is connected with an energy storage control chip U2, and the other end of the resistor R15 and the S pole of the driving triode Q2 are grounded; one ends of the resistor R17, the resistor R20 and the resistor R24 are all connected with the energy storage control chip U2, the other end of the resistor R17 is connected with the second comparison circuit 55, and the other ends of the resistor R20 and the resistor R24 are grounded; in specific implementation, the output end of the second power supply conversion output circuit 5 is further provided with a capacitor C15 and a capacitor C16, and the capacitor C15 and the capacitor C16 are used for matching with the rectifier diode D6 to perform rectification and filtering processing on the output 24V voltage;

the feedback circuit 53 comprises a resistor R19 and a resistor R19-1, one end of each of the resistor R19 and the resistor R19-1 is connected with the energy storage control chip U2, the other end of the resistor R19 is connected with the output end of the rectifier diode D6, and the other end of the resistor R19-1 is grounded;

the first filter circuit 51 comprises a capacitor C11, a capacitor C12 and a capacitor C13 which are arranged in parallel, and the first filter circuit 51 is used for filtering the voltage input by the storage battery 2. The second comparison circuit 55 comprises a comparator U3A, the negative input end of the comparator U3A is connected with the reference voltage sampling circuit 44, and the positive input end of the comparator U3A is connected with the storage battery 2 through the second battery voltage sampling circuit 56; the second battery voltage sampling circuit 56 is composed of a resistor R2, a resistor R6, and a capacitor C6, and is configured to sample the voltage of the storage battery 2.

When the second power supply conversion output circuit 5 of the present invention specifically operates, when the voltage of the battery 2 (battery voltage 2) is higher than the reference voltage, the comparator U3A outputs a high level, and the high level is supplied to the enable pin of U2 after the voltage is divided by R17 and R20; when the voltage of the enable pin of the U2 is higher than 2V, the 1pin of the U2 outputs a PWM signal, Q2 is conducted in the first period, the L3 starts to store energy, and the current returns to the negative electrode of the storage battery 2 through L3 and Q2; when the fixed on-time is reached, Q2 is cut off, L3 stops energy storage, the voltage of L3 is superposed with the voltage of the storage battery 2, and the voltage is rectified and filtered through D6, C15 and C16 to supply power to a load; and meanwhile, after the voltage is divided by R19 and R19-1, the voltage of R19 is sent to 6pin of U2, and when the voltage of the 6pin is higher than 120mV, the energy storage of the second period is carried out. When the main load enable switch 7 is switched to 24EN, indicating that 24V is supplying power to the main load, the battery voltage 2 will be forced to be pulled high, at which time the U2 enable will not be controlled by the second comparator circuit 55, i.e. 24Vdc is set to the main load power, giving priority to the use of the voltage of the battery 2.

In the third power conversion output circuit 6 of the present invention, the second energy storage circuit 62 includes an energy storage inductor L1 and an energy storage control chip U10; the VIN pin of the energy storage control chip U10 and one end of an energy storage inductor L1 are both connected with the second filter circuit 61, and the other end of the energy storage inductor L1 is connected with the SW pin of the energy storage control chip U10;

the power conversion circuit 63 comprises an energy storage inductor L2, a capacitor C4, a diode D1, a capacitor C1, a capacitor C2 and a capacitor C3; one end of the capacitor C4 is connected with a SW pin of the energy storage control chip U10, the other end of the capacitor C4 and the input end of the diode D1 are both connected with one end of an energy storage inductor L2, and the other end of the energy storage inductor L2 is grounded; one ends of the capacitor C1, the capacitor C2 and the capacitor C3 are all connected with the output end of the diode D1, and the other ends of the capacitor C1, the capacitor C2 and the capacitor C3 are all grounded;

the voltage regulating feedback circuit 64 comprises a resistor R8 and an adjustable resistor R9; one ends of the resistor R8 and the adjustable resistor R9 are connected with an FB pin of the energy storage control chip U10, the other end of the resistor R8 is connected with the output end of the diode D1, and the other end of the adjustable resistor R9 is grounded;

the second filter circuit 61 includes a capacitor C8, a capacitor C9, and a capacitor C10, which are arranged in parallel, and the second filter circuit 61 is configured to filter the voltage input by the battery 2. The third comparison circuit 66 comprises a comparator U1A, the negative input end of the comparator U1A is connected with the reference voltage sampling circuit 44, and the positive input end of the comparator U1A is connected with the storage battery 2 through a third battery voltage sampling circuit 67; the third battery voltage sampling circuit 67 is composed of a resistor R3, a resistor R7, and a capacitor C7, and is configured to sample the voltage of the secondary battery 2.

When the third power supply conversion output circuit 6 works specifically, when the voltage of the storage battery 2 (battery voltage 3) is higher than the reference voltage, the energy storage control chip U10 is enabled; when the SW is closed, the D1 is cut off, the current on the L1 stores energy to the L1 along the VIN-L1-SW, meanwhile, the C4 stores energy to the L2 through the SW, the output capacitors C1, C2 and C3 discharge to provide output current for the load; when SW is off, a back electromotive force is generated on L2, so that D1 is turned from off to on, and there are two current paths: one is that IL1 provided by L1 powers the load along L1-C4- > D1; the other is that IL2 supplies power to the load along L2-D1. The output voltage expression Uout is Uin D/(1-D). When the main load enable switch 7 is switched to 5-48EN, indicating that 5-48V is supplying the main load power supply, the battery voltage 3 will be forced to be pulled high, and the U10 enable will not be controlled by the third comparison circuit 66, i.e. 5-48Vdc is set as the main load power supply, preferentially using the voltage of the secondary battery 2. In specific implementation, the main load power supply can be adjusted to a value between 5 and 48V according to actual use requirements so as to better meet the actual use requirements.

In the utility model, the charge and discharge control circuit 1 comprises a charge and discharge chip U6, a capacitor C25, a capacitor C24, a capacitor C26, a MOS transistor Q6, an anti-reflux diode D7, a freewheeling diode D9 and a sampling resistor R25;

one end of the capacitor C25, one end of the capacitor C24, one end of the capacitor C26 and the S electrode of the MOS transistor Q6 are connected with the photovoltaic panel 3, the other ends of the capacitor C25 and the capacitor C24 are grounded, one end of the capacitor C24 is connected with the charge-discharge chip U6, and the other end of the capacitor C26 is connected with the charge-discharge chip U6; the G pole of the MOS tube Q6 is connected with the charging and discharging chip U6, and the D pole of the MOS tube Q6 is connected with one end of the anti-reflux diode D7; one end of the freewheeling diode D9 is grounded, the other ends of the reverse-flow-preventing diode D7 and the freewheeling diode D9 are connected with the sampling resistor R25, and the sampling resistor R25 is connected with the storage battery 2.

In the utility model, the device also comprises a state indicating circuit 8, wherein the state indicating circuit 8 is used for indicating the working state; the state indicating circuit 8 is connected with the charging and discharging control circuit 1. The state indicating circuit 8 comprises a resistor R26, a resistor R27, an LD1 and an LD2, wherein the resistor R26 is connected with the LD1 in series, and the resistor R27 is connected with the LD2 in series; the resistor R26 and the resistor R27 are current-limiting resistors.

When the charge and discharge control circuit 1 works, the voltage S + of the photovoltaic panel 3 is filtered by the C25 and the C24 and then supplies power to the charge and discharge chip U6, and when the voltage of a VCC pin of the U6 is larger than a low-voltage latch threshold and is larger than the voltage of the storage battery 2, the charge and discharge chip U6 works normally. When the voltage of the storage battery 2 is lower than the trickle charge threshold, the charge and discharge chip U6 automatically enters into the trickle charge mode. When the voltage of the storage battery 2 is larger than the trickle charge threshold, the charge and discharge chip U6 enters a constant current charging mode, and the charging current is set by an internal 120mV reference voltage and an external resistor RCS, namely the charging current is 120 mV/RCS. When the voltage of the storage battery 2 continues to rise to approach the constant voltage charging voltage, the charging and discharging chip U6 enters the constant voltage charging mode, and the charging current gradually decreases. In the charging state, a transistor in the pin of the open-drain output 3pin is turned on, and a low level is output to indicate the charging state. When charging is finished, the DRV pin outputs high level, a transistor in a 3pin is output by an open drain, and the output is in a high-resistance state; the other open-drain output 4pin internal transistor is turned on to output a low level to indicate the end-of-charge state.

In the utility model, the LED lamp also comprises a light intensity acquisition circuit 9 and an LED discharge circuit 10;

the illuminance acquisition circuit 9 is connected with the photovoltaic panel 3; the LED discharge circuit 10 is connected with the illuminance acquisition circuit 9; the LED discharge circuit 10 is connected to the charge and discharge control circuit 1.

The illuminance acquisition circuit 9 is composed of a triode Q3, a triode Q5, a resistor R12, a resistor R13, a resistor R14, a resistor R16, a resistor R18, a resistor R21 and a resistor R22; the resistor R16 and the resistor R21 are bias resistors of Q3; the resistor R18 is a bias resistor of Q5; the resistor R12 and the resistor R13 are current-limiting resistors of Q3; the triode Q3 and the triode Q5 are both control enabling triodes; resistor R22 is a coupling resistor. When the illuminance acquisition circuit works, when S + is at a high level (in the daytime), the voltage divided by R16 and R21 is higher than the VBE voltage of Q3, Q3 is conducted, the OFF/ON potential is pulled low, and the OFF/ON SW end outputs a low level (OFF/ONSW is used for enabling the state of an LED load and is turned OFF when the OFF/ON SW is at the low level); when S + is low level (evening), Vbe voltage of Q3 is less than 0.7V, OFF/ON potential is pulled high, Q5 is enabled to be conducted through R18, and after Q5 is conducted, base potential of Q3 is further pulled low through a feedback resistor R14, so that the problem of LED output flicker is solved.

The LED discharge circuit 10 mainly comprises a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a current-limiting resistor R29, a voltage-stabilizing diode D10, a resistor R36, a resistor R37, an enable switch Q8, an MOS transistor Q7, a pull-down resistor R40, a driving resistor R30, a pull-down resistor R32, an energy storage inductor L4, a rectifier diode D8, a capacitor C27, a sampling resistor R33, a coupling resistor R31, an equidirectional proportion amplification circuit U5A, a capacitor C17, a resistor R28, a resistor R35, a resistor R34 and a control chip U4; the capacitor C19, the capacitor C20, the capacitor C21 and the capacitor C22 are filter capacitors; the voltage stabilizing diode D10 is used for providing 5V working voltage for the control chip U4; the resistor R36 and the resistor R37 are bias resistors; the pull-down resistor R40 is used for preventing the 1pin of the control chip U4 from outputting a high level; the driving resistor R30 is used for reducing high-frequency interference; the pull-down resistor R32 is used for preventing the MOS transistor Q7 from being conducted; the rectifier diode D8 and the capacitor C27 play roles of rectifying and filtering; the capacitor C17, the resistor R28 and the resistor R35 are used for adjusting the amplification factor. When the LED discharge circuit works, when the OFF/ONSW is in a high level, namely, the LED discharge circuit enters a night state, the enable pin of the control chip U4 is pulled high, the DRV pin of 1pin starts to output a PWM signal, in the first period of PWM, Q7 is switched on, L4 starts to store energy, after the fixed on-time is reached, Q7 is switched OFF, the voltage of L4 is superposed with the voltage of the storage battery 2, the voltage is rectified and filtered through D6 and C27 to supply power to an LED load, the voltage generated by load current on R33 is filtered through R31 and C29 and then is sent to the homodromous input end of the homodromous proportional amplification circuit U5A, the amplified potential is fed back to the CS pin of U4 through R34, and when the voltage of the CS pin is more than 100mV, the PWM is switched on and enters energy conversion of the second period.

Although specific embodiments of the utility model have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the utility model, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the utility model, which is to be limited only by the appended claims.

Claims (10)

1. The utility model provides a solar street lamp power supply management controlling means which characterized in that: the photovoltaic power supply conversion device comprises a charge and discharge control circuit, a storage battery, a photovoltaic panel, a first power supply conversion output circuit, a second power supply conversion output circuit and a third power supply conversion output circuit; the photovoltaic panel is connected with a charge and discharge control circuit, and the charge and discharge control circuit is connected with a storage battery; and the first power supply conversion output circuit, the second power supply conversion output circuit and the third power supply conversion output circuit are all connected with the storage battery.

2. The power supply management and control device for the solar street lamp as claimed in claim 1, wherein: also includes a main load enable switch; and the first power supply conversion output circuit, the second power supply conversion output circuit and the third power supply conversion output circuit are all connected with the main load enabling switch.

3. The power supply management and control device for the solar street lamp as claimed in claim 2, wherein: the first power supply conversion output circuit comprises a power switch circuit, a first comparison circuit and a 12V voltage output interface; the power switch circuit is connected with the storage battery; the first comparison circuit and the 12V voltage output interface are connected with the power switch circuit; the first comparison circuit is connected with a main load enable switch.

4. The power supply management and control device for the solar street lamp as claimed in claim 3, wherein: the second power supply conversion output circuit comprises a first filter circuit, a first energy storage circuit, a feedback circuit, a 24V voltage output interface and a second comparison circuit; the first filter circuit is connected with the storage battery; the first energy storage circuit is connected with the first filter circuit; the feedback circuit and the 24V voltage output interface are connected with the first energy storage circuit; the second comparison circuit is connected with the feedback circuit; the second comparison circuit is connected with the main load enable switch.

5. The power supply management and control device for the solar street lamp as claimed in claim 4, wherein: the third power supply conversion output circuit comprises a second filter circuit, a second energy storage circuit, a power conversion circuit, a voltage regulation feedback circuit, a 5-48V voltage output interface and a third comparison circuit; the second filter circuit is connected with the storage battery; the second energy storage circuit is connected with the second filter circuit; the power conversion circuit is connected with the second energy storage circuit; the voltage regulation feedback circuit is connected with the power conversion circuit; the third comparison circuit is connected with the voltage regulation feedback circuit; the power conversion circuit and the voltage regulation feedback circuit are connected with a 5-48V voltage output interface; the third comparison circuit is connected with the main load enable switch.

6. The power supply management and control device for the solar street lamp as claimed in claim 3, wherein: the power switch circuit comprises a power switch Q1, a driving triode Q4, a resistor R10 and a resistor R23; the D pole of the power switch Q1 is connected with a 12V voltage output interface, the S pole of the power switch Q1 is connected with a storage battery, and the G pole of the power switch Q1 is connected with the c pole of the driving triode Q4; one end of the resistor R10 is connected with the S pole of the power switch Q1, and the other end of the resistor R10 is connected with the G pole of the power switch Q1; the b pole of the driving triode Q4 is connected with the first comparison circuit, one end of the resistor R23 is connected with the b pole of the driving triode Q4, and the e pole of the driving triode Q4 and the other end of the resistor R23 are grounded.

7. The power supply management and control device for the solar street lamp as claimed in claim 4, wherein: the first energy storage circuit comprises an energy storage inductor L3, an energy storage control chip U2, a rectifier diode D6, a driving triode Q2, a resistor R11, a resistor R15, a resistor R17, a resistor R20 and a resistor R24; one end of the energy storage control chip U2 and one end of the energy storage inductor L3 are connected with the first filter circuit; the other end of the energy storage inductor L3 is connected with a 24V voltage output interface through a rectifier diode D6; the D pole of the driving triode Q2 is connected with the other end of the energy storage inductor L3, the G pole of the driving triode Q2 is respectively connected with one ends of a resistor R11 and a resistor R15, the other end of the resistor R11 is connected with an energy storage control chip U2, and the other end of the resistor R15 and the S pole of the driving triode Q2 are grounded; one ends of the resistor R17, the resistor R20 and the resistor R24 are all connected with the energy storage control chip U2, the other end of the resistor R17 is connected with the second comparison circuit, and the other ends of the resistor R20 and the resistor R24 are grounded;

the feedback circuit comprises a resistor R19 and a resistor R19-1, one end of each of the resistor R19 and the resistor R19-1 is connected with the energy storage control chip U2, the other end of the resistor R19 is connected with the output end of the rectifier diode D6, and the other end of the resistor R19-1 is grounded.

8. The power supply management and control device for the solar street lamp as claimed in claim 5, wherein: the second energy storage circuit comprises an energy storage inductor L1 and an energy storage control chip U10; the VIN pin of the energy storage control chip U10 and one end of an energy storage inductor L1 are both connected with a second filter circuit, and the other end of the energy storage inductor L1 is connected with the SW pin of the energy storage control chip U10;

the power conversion circuit comprises an energy storage inductor L2, a capacitor C4, a diode D1, a capacitor C1, a capacitor C2 and a capacitor C3; one end of the capacitor C4 is connected with a SW pin of the energy storage control chip U10, the other end of the capacitor C4 and the input end of the diode D1 are both connected with one end of an energy storage inductor L2, and the other end of the energy storage inductor L2 is grounded; one ends of the capacitor C1, the capacitor C2 and the capacitor C3 are all connected with the output end of the diode D1, and the other ends of the capacitor C1, the capacitor C2 and the capacitor C3 are all grounded;

the voltage regulating feedback circuit comprises a resistor R8 and an adjustable resistor R9; one ends of the resistor R8 and the adjustable resistor R9 are connected with an FB pin of the energy storage control chip U10, the other end of the resistor R8 is connected with the output end of the diode D1, and the other end of the adjustable resistor R9 is grounded.

9. The power supply management and control device for the solar street lamp as claimed in claim 1, wherein: the charging and discharging control circuit comprises a charging and discharging chip U6, a capacitor C25, a capacitor C24, a capacitor C26, an MOS (metal oxide semiconductor) tube Q6, an anti-reflux diode D7, a freewheeling diode D9 and a sampling resistor R25;

one end of the capacitor C25, one end of the capacitor C24, one end of the capacitor C26 and the S electrode of the MOS transistor Q6 are connected with the photovoltaic panel, the other ends of the capacitor C25 and the capacitor C24 are grounded, one end of the capacitor C24 is connected with the charge-discharge chip U6, and the other end of the capacitor C26 is connected with the charge-discharge chip U6; the G pole of the MOS tube Q6 is connected with the charging and discharging chip U6, and the D pole of the MOS tube Q6 is connected with one end of the anti-reflux diode D7; one end of the freewheeling diode D9 is grounded, the other ends of the anti-reflux diode D7 and the freewheeling diode D9 are connected with the sampling resistor R25, and the sampling resistor R25 is connected with the storage battery.

10. The power supply management and control device for the solar street lamp as claimed in claim 1, wherein: the LED lamp also comprises a luminance acquisition circuit and an LED discharge circuit;

the illuminance acquisition circuit is connected with the photovoltaic panel; the LED discharge circuit is connected with the illuminance acquisition circuit; the LED discharge circuit is connected with the charge-discharge control circuit.

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