CN208423761U - Solar LED street lamp with overcurrent protection function - Google Patents

Abstract

The utility model discloses a kind of solar LED street lamps with overcurrent protection function, it is intended to solve the technical problem that existing solar illuminating system the degree of automation is low, safety measure is not perfect, maintenance cost is high.The utility model includes silicon photocell, lead-acid accumulator, control module and lighting load；Control module includes microcontroller circuit and load detecting circuit, and load detecting circuit includes containing sampling resistor R7, the first order overcurrent protection of operational amplifier U1 and U2 and second level overcurrent protection containing thermistor F；Sampling resistor R7 is connected by current-limiting resistance R6 with the positive input terminal of operational amplifier U1, its negative input end is grounded by pull down resistor R5, its output end is connected with the input terminal of microprocessor circuit and operational amplifier U2 respectively, the output end of operational amplifier U2 is connected with the interruptive port of microprocessor, is also connected with pull-up resistor R10 thereon.The advantageous effects of the utility model are: high degree of automation, high safety, O&M cost are low.

Description

Solar LED street lamp with overcurrent protection function

Technical field

The utility model relates to application of solar, and in particular to a kind of solar energy with overcurrent protection function LED street lamp.

Background technique

Currently, photoelectric lighting consumption accounts for about 20% or so of entire power consumption, reducing electric consumption on lighting is the weight for saving the energy Want approach.To realize this target, industry has researched and developed a variety of energy-saving illumination utensils, and achieves certain effect.But It is that also farther out, the new type light source gesture that development and application is more efficient, reliable, safe, durable is must for the requirement of distance " green illumination " Row.

Solar energy as a kind of cleaning, efficient and sustainable renewable energy energy-saving illumination application field increasingly It is taken seriously.But existing solar illuminating system is needed mostly through artificial regulatory, the degree of automation is not high, Er Qiean Full guard measure is limited, once damage, it is necessary to artificial replacement, it is troublesome in poeration.

Summary of the invention

The technical problems to be solved in the utility model be existing solar control system the degree of automation is low, safety measure not Maintenance cost perfect, complicated for operation is high.

In order to solve the above technical problems, the utility model adopts the following technical solution:

Design a kind of solar LED street lamp with overcurrent protection function, including illuminant module, energy-storage module, control mould Block and lighting load；Control module includes microcontroller circuit and load detecting circuit, and load detecting circuit includes containing sampling Resistance R7, the first order overcurrent protection of operational amplifier U1 and U2 and the second level overcurrent protection containing thermistor F；Sampling Resistance R7 is connected by current-limiting resistance R6 with the positive input terminal of operational amplifier U1, and negative input end is connect by pull down resistor R5 Ground, output end are connected with the input terminal of microcontroller circuit and operational amplifier U2 respectively, the output end of operational amplifier U2 It is connected with the interruptive port of microcontroller circuit, is also connected with pull-up resistor R10 thereon；Using being improved after two class protection measure The security performance of circuit.

Preferably, the illuminant module includes monocrystaline silicon solar cell, and silicon solar cell is that current development is most mature , leading position is occupied in the application, and it is convenient to obtain.

Preferably, energy-storage module includes lead-acid accumulator, cheap, is suitable for discharging at low temperature and high multiplying power.

Preferably, lighting load includes LED light source, and the service life, operating voltage was low up to 1000000 hours, is not needed inverse Become device, light efficiency is higher.

Preferably, microcontroller circuit includes STC12C5410AD single-chip microcontroller, resourceful in piece, integrated level is high, uses It is convenient.

Compared with prior art, the advantageous effects of the utility model are:

1. the utility model good illumination effect is equivalent to incandescent lamp 150W-200W, and light using high-powered LED lamp It is high-quality.

2. the utility model is energy saving, using photovoltaic power generation using solar energy as energy source, meet sustainable development Strategy.

3. the utility model is highly-safe, overcurrent interrupts protection and electrical fuse constitutes two-stage overcurrent protection, improves Electrical fuse and interruption protection can be certainly after the security performance of system, and high degree of automation, overcurrent revocation or open circuit recovery It is dynamic to restore, without artificial replacement or maintenance.

Detailed description of the invention

Fig. 1 is the utility model hardware structural diagram；

Fig. 2 is the utility model load detecting circuit structural schematic diagram.

Specific embodiment

Illustrate specific embodiment of the present utility model with reference to the accompanying drawings and examples, but following embodiment only uses It is described in detail the utility model, does not limit the scope of the utility model in any way.

Program that is involved or relying on is the conventional program or simple program of the art, ability in following embodiment Field technique personnel can make conventional selection or are adaptively adjusted according to concrete application scene.

The devices such as unit module, components involved in following embodiment, structure, mechanism or sensor, such as without especially Illustrate, is then conventional commercial product.

Embodiment 1: a kind of solar LED street lamp with overcurrent protection function, referring to Fig. 1, silicon photocell receives the sun Irradiation is converted solar energy into electrical energy using photoelectric effect to be stored in lead-acid accumulator, is lighted under the action of microcontroller LED light lighting load.Battery converts the current signal that microcontroller can identify for voltage signal by sampling resistor and is sent into Microcontroller input, microcontroller select STC12C5410A single-chip microcontroller, use risc type CPU core, compatibility common 8051 Instruction acquisition, piece content contains 10KBFlash program storage, while doorway (WDT) is also seen in inside；Embedded MAX810 Special reset circuit, 10,8 channel ADC and 4 channel PWM；With programmable 8 grades of interrupt source, 4 kinds of priority, has and be Piece unite into (ISP) and in-service units (IAP), it is resourceful in piece, integrated level is high, easy to use.STC12C5410AD is to this The work of embodiment carries out implementation scheduling, realizes the setting of external input parameter, the management of battery and load, working condition Instruction；After the voltage signal of battery is received by microcontroller, using the PWM function of microcontroller, charge to battery Management.In battery pack open circuit, if when solar battery charges normal, controller by switching off load, with proof load not by Damage, if controller does not have any movement due to itself cannot get electric power when not charging at night or solar battery.It is logical PWM charge function is crossed, solar panel can be made to play maximum effect, improves system charge efficiency.

Fig. 2 is load detecting circuit, main to realize overcurrent and short-circuit protection function, devises two class protection.The first order is adopted Cooperate single-chip microcontroller with the overcurrent of the devices such as R7 (0.01 Ω constantan wire) and two amplifier LM358 composition, short-circuit detecting circuit A/D conversion and external interrupt respond to realize, P1.7 (A/D conversion) mouth is sent in the output of left side LM358, be used as over-current signal knowledge Not, LM358 amplifier output end in right side connects pull-up resistor R10, constitutes voltage comparator and is connected with the interrupt interface of microcontroller, when Electric current is more than rated current 20% and maintains to be confirmed as overcurrent when 30s or more, generates interrupt signal；Short circuit current adjusting is 10A, Response time is the millisecond order of magnitude.The second level is protected using electrical fuse, when the electric current for flowing through electrical fuse increases suddenly Added-time, temperature rise with it, and resistance greatly increases, and operating current is greatly reduced, and reach protection circuit purpose, the response time is The order of seconds, overcurrent cancel or short circuit restore after electrical fuse revert to low-impedance conductor, without any artificial replacement or dimension It repairs.

The utility model is described in detail above in conjunction with drawings and examples, still, the skill of technical field Art personnel, can also be to each specific in above-described embodiment it is understood that without departing from the purpose of the present invention Parameter changes, and forms multiple specific embodiments, is the common variation range of the utility model, no longer detailed one by one herein It states.

Claims (4)

1. a kind of solar LED street lamp with overcurrent protection function, including illuminant module, energy-storage module, control module and photograph Bright load, it is characterised in that: the control module includes microcontroller circuit and load detecting circuit, the load detecting circuit Including containing sampling resistor R7, the first order overcurrent protection of operational amplifier U1 and U2 and the second level containing thermistor F Overcurrent protection；The sampling resistor R7 is connected by current-limiting resistance R6 with the positive input terminal of operational amplifier U1, negative input end It being grounded by pull down resistor R5, output end is connected with the input terminal of the microcontroller circuit and operational amplifier U2 respectively, The output end of the operational amplifier U2 is connected with the interruptive port of the microcontroller circuit, is also connected with pull-up resistor thereon R10。

2. the solar LED street lamp according to claim 1 with overcurrent protection function, it is characterised in that: described photosensitive Module includes mono-crystalline silicon solar plate.

3. the solar LED street lamp according to claim 1 with overcurrent protection function, it is characterised in that: the energy storage Module includes lead-acid accumulator.

4. the solar LED street lamp according to claim 1 with overcurrent protection function, it is characterised in that: the micro-control Device circuit processed includes STC12C5410AD single-chip microcontroller.