CN202759270U - Solar charge controller - Google Patents

Solar charge controller Download PDF

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Publication number
CN202759270U
CN202759270U CN 201220413480 CN201220413480U CN202759270U CN 202759270 U CN202759270 U CN 202759270U CN 201220413480 CN201220413480 CN 201220413480 CN 201220413480 U CN201220413480 U CN 201220413480U CN 202759270 U CN202759270 U CN 202759270U
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CN
China
Prior art keywords
circuit
output
mosfet
mosfet pipe
charging
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
CN 201220413480
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Chinese (zh)
Inventor
张延胜
潘世高
黄敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FOSHAN BURKE NEW ENERGY TECHNOLOGY CO LTD
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FOSHAN BURKE NEW ENERGY TECHNOLOGY CO LTD
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Priority to CN 201220413480 priority Critical patent/CN202759270U/en
Application granted granted Critical
Publication of CN202759270U publication Critical patent/CN202759270U/en
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Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a solar charge controller, comprising a photovoltaic input, a charge output, a load output, an MCU, a first MOSFET, a second MOSFET, a third MOSFET, a charge control circuit used for controlling the conduction duty ratio of the first MOSFET, an anti-reverse-connection detection circuit and an output control circuit, wherein a negative terminal of the photovoltaic input is sequentially connected with a source electrode of the first MOSFET, a drain electrode of the first MOSFET, a drain electrode of the second MOSFET and a source electrode of the second MOSFET, and then connected to a negative terminal of the charge output; and the negative terminal of the charge output is sequentially connected with a source electrode of the third MOSFET and a drain electrode of the third MOSFET, and then connected to a negative terminal of the load output; and the MCU is used for controlling the conduction duty ratio of the first MOSFET via the charge control circuit to realize wave chopping of a charge current, controlling the switch-on and switch-off of the second MOSFET via the anti-reverse-connection detection circuit and controlling the switch-on and switch-off of the third MOSFET via the output control circuit. The solar charge controller disclosed by the utility model is used for realizing continuous adjustment of the charge current and has an anti-reverse-connection function for an accumulator and is high in charge and power supply reliability.

Description

A kind of solar charging controller
Technical field
The utility model relates to the solar charging power technology, particularly a kind of solar charging controller.
Background technology
Solar energy power generating is a kind of important form that solar energy utilizes, and along with technology is constantly progressive, photovoltaic generation might be to have one of generation technology of development prospect most.And utilize solar cell for supplying power to be based on " photovoltaic effect " principle, and convert solar energy into electrical energy, utilize charging modes that solar radiation is converted into electric energy.It has permanent, spatter property and the large advantage of flexibility, is that other energy are incomparable.
Utilize at present the electric supply installation of solar cell mainly by photovoltaic module, batteries and controller form, photovoltaic input both positive and negative polarity with photovoltaic module, the batteries both positive and negative polarity, load both positive and negative polarity correspondence is joined, form current supply circuit and charge circuit, controller is located in current supply circuit and the charge circuit, can carry out regulation and control to the photovoltaic module electricity, on the one hand the energy after adjusting is sent to DC load or AC load, on the other hand unnecessary energy being sent to batteries stores, when electricity can not satisfy the load needs, controller was sent to load to the electric energy of batteries again.After batteries was full of electricity, controller will be controlled storage battery and do not overcharged.When the stored electric energy of batteries discharged, controller will be controlled batteries not by overdischarge, the protection storage battery.But when the performance of controller is bad, very large on impact in useful life of storage battery, and finally affect the reliability of whole electric supply installation.
As seen, existing controller does not have the function of the complementary power supply of lightning protection, anti-overflow, overload, the group reversal connection of electricity storage preventing pond and solar panel and storage battery, has brought the very big inconvenience of using, and power supply, charging reliability are also lower.
The utility model content
Technical problem to be solved in the utility model just provides a kind of solar charging controller, realizes the continuous adjusting to charging current, has simultaneously the anti-reverse function of storage battery, charging, power supply reliability height.
For solving the problems of the technologies described above, the technical scheme that the utility model is taked is as follows: a kind of solar charging controller, it is characterized in that: it comprises the photovoltaic input, charging output, load output, MCU, the first to the 3rd MOSFET pipe, the charging control circuit that is used for the conducting duty ratio of control the one MOSFET pipe, be used for preventing the anti-reverse testing circuit of batteries reversal connection and be used for the output control circuit that load is cut off in control, the negative terminal of described photovoltaic input connects the source electrode of a MOSFET pipe successively, the drain electrode of the one MOSFET pipe, the drain electrode of the 2nd MOSFET pipe, the 2nd MOSFET pipe source electrode after be connected to the negative terminal of charging output, the negative terminal of described charging output also connects the source electrode of the 3rd MOSFET pipe successively, be connected to the negative terminal of load output after the drain electrode of the 3rd MOSFET pipe; The conducting duty ratio that described MCU controls a MOSFET pipe through charging control circuit realizes charging current copped wave, controls the break-make of the 2nd MOSFET pipe through anti-reverse testing circuit, controls the break-make of the 3rd MOSFET pipe through output control circuit.
Solar charging controller described in the utility model also comprises photovoltaic voltage sampling circuit, battery voltage sampling circuit, charging current sample circuit, output current sample circuit, after respectively photovoltaic input voltage, accumulator battery voltage, charging output current, load output current being sampled successively, access the respective input of described MCU.
Solar charging controller described in the utility model also comprises the lightning protection circuit for lightning protection, is connected between the positive and negative terminal of photovoltaic input.
Solar charging controller described in the utility model also comprises overload protecting circuit, is connected between output sample circuit and the MCU.
Solar charging controller described in the utility model also comprise for the communication interface circuit of external communication, the button that is used for arranging charging work arranges circuit and is used for the display circuit of display working condition, link to each other with the respective input of described MCU respectively.
The output of anti-reverse testing circuit described in the utility model is connected with the reversal connection warning circuit of reporting to the police for reverse connection of accumulator.
Solar charging controller described in the utility model also comprises the temperature sampling circuit for detection of the temperature of storage battery, is connected in the respective input of described MCU.
The utility model is than the beneficial effect of prior art:
The utility model can be controlled by MCU the continuous adjusting of charging current, and has the function of lightning protection, anti-overflow, overload, the group reversal connection of electricity storage preventing pond and solar panel and the complementary power supply of storage battery, and is easy to use, charging, power supply reliability height.
Description of drawings
Fig. 1 is the connection schematic block diagram of the utility model solar charging controller;
Fig. 2 is the circuit connection diagram of the utility model solar charging controller;
Fig. 3 is the workflow diagram of the utility model solar charging controller.
Embodiment
Such as Fig. 1-a kind of solar charging controller shown in Figure 2, it comprises the photovoltaic input, charging output, load output, MCU, the first to the 3rd MOSFET pipe, the charging control circuit that is used for the conducting duty ratio of control the one MOSFET pipe, be used for preventing the anti-reverse testing circuit of batteries reversal connection and be used for the output control circuit that load is cut off in control, the negative terminal of photovoltaic input connects the source electrode of a MOSFET pipe successively, the drain electrode of the one MOSFET pipe, the drain electrode of the 2nd MOSFET pipe, the 2nd MOSFET pipe source electrode after be connected to the negative terminal of charging output, the negative terminal of charging output also connects the source electrode of the 3rd MOSFET pipe successively, be connected to the negative terminal of load output after the drain electrode of the 3rd MOSFET pipe; The conducting duty ratio that MCU controls a MOSFET pipe through charging control circuit realizes charging current copped wave, MCU controls the break-make of the 2nd MOSFET pipe through anti-reverse testing circuit, MCU controls the break-make of the 3rd MOSFET pipe through output control circuit, to open or to disconnect charging.
Solar charging controller described in the utility model also comprises photovoltaic voltage sampling circuit, battery voltage sampling circuit, charging current sample circuit, output current sample circuit, after respectively photovoltaic input voltage, accumulator battery voltage, charging output current, load output current being sampled successively, access the respective input of described MCU.MCU judges according to photovoltaic input voltage, accumulator battery voltage, charging current that sampling obtains whether the photovoltaic input voltage is normal, judge whether batteries overcharges, in order to control unlatching or disconnect charging.Charging control circuit is regulated the pwm pulse width of MCU output, realizes charging current from the zero continuous adjusting to maximum current.The load output current that MCU also obtains according to sampling is by the output of output control circuit control disconnecting consumers.The workflow of this controller as shown in Figure 3.
In Fig. 2, it is the control chip of M0516LAN that the MCU of present embodiment adopts model, and resistance R 3, R4, R5 are sampling with high precision resistance, cooperates operational amplifier to consist of each sample circuit and put back and connects testing circuit.Ipv_senser point current potential is used for sampling and obtains the photovoltaic input current; Ichg point current potential is used for sampling and obtains the charging output current; Iload_senser point current potential is used for sampling and obtains the load output current.The PV_PWM signal is connected to the PWM output of MCU, and the Inv_pretect signal is connected to the output of anti-reverse testing circuit, and the Output_ctr signal is connected to the output of output control circuit.The negative terminal of external solar cell panel is communicated with the negative pole of batteries by the control of MOSFET pipe Q1, realizes the charging to outside storage battery.Along with the rising of accumulator battery voltage, control the conducting duty ratio realization of MOSFET pipe Q1 to the copped wave of charging current.By the break-make of relatively controlling the 2nd MOSFET pipe Q2 to outside batteries terminal voltage and external solar battery terminal voltage, its anti-reverse principle is the negative pole of comparison external solar battery and the negative terminal current potential of outside batteries; Because the anode of solar panel and batteries directly connects together, so when the negative pole current potential of solar panel is lower than batteries negative pole current potential, the terminal voltage that solar cell is described is higher than accumulator voltage, this moment voltage comparator positively biased so that the conducting of the 2nd MOSFET pipe; Otherwise the metal-oxide-semiconductor cut-off, can't charge or power to load this moment, realized the reverse connecting protection of external solar cell panel or batteries.The output of anti-reverse testing circuit is connected with the reversal connection warning circuit of reporting to the police for reverse connection of accumulator, mainly adopts buzzer, can sound the alarm during reversal connection.
The button that solar charging controller of the present utility model also comprises lightning protection circuit for lightning protection, overload protecting circuit, be used for the communication interface circuit of external communication, be used for arranging charging work arranges circuit, is used for the display circuit of display working condition, for detection of the temperature sampling circuit of the temperature of storage battery.Lightning protection circuit comprises thermistor VR1 between the positive and negative terminal that is connected in photovoltaic input and thermistor VR1 two ends and the capacitor C 1 that connects.Overload protecting circuit is connected between output sample circuit and the MCU, when detecting the load output overloading, then cuts off load by MCU control.Button arranges circuit, communication interface circuit, display circuit, temperature sampling circuit and links to each other with the respective input of MCU respectively, wherein button arranges circuit, communication interface circuit, display circuit as human-computer interaction terminal, communication interface circuit can adopt the RS232 communication interface unit, and with optocoupler communication line and MCU is separated; Display circuit shows the state of this controller operation, and selects the display light coucher to make state, charging operating state, loaded work piece state, batteries operating state and fault-alarming state information etc. by key circuit.
Above-described embodiment is preferred embodiment of the present utility model only, is not to limit practical range of the present utility model; Be all variation and modification of doing according to the utility model content, all contained by the utility model claim scope required for protection.

Claims (7)

1. solar charging controller, it is characterized in that: it comprises the photovoltaic input, charging output, load output, MCU, the first to the 3rd MOSFET pipe, the charging control circuit that is used for the conducting duty ratio of control the one MOSFET pipe, be used for preventing the anti-reverse testing circuit of batteries reversal connection and be used for the output control circuit that load is cut off in control, the negative terminal of described photovoltaic input connects the source electrode of a MOSFET pipe successively, the drain electrode of the one MOSFET pipe, the drain electrode of the 2nd MOSFET pipe, the 2nd MOSFET pipe source electrode after be connected to the negative terminal of charging output, the negative terminal of described charging output also connects the source electrode of the 3rd MOSFET pipe successively, be connected to the negative terminal of load output after the drain electrode of the 3rd MOSFET pipe; The conducting duty ratio that described MCU controls a MOSFET pipe through charging control circuit realizes charging current copped wave, controls the break-make of the 2nd MOSFET pipe through anti-reverse testing circuit, controls the break-make of the 3rd MOSFET pipe through output control circuit.
2. solar charging controller according to claim 1, it is characterized in that: described solar charging controller also comprises photovoltaic voltage sampling circuit, battery voltage sampling circuit, charging current sample circuit, output current sample circuit, after respectively photovoltaic input voltage, accumulator battery voltage, charging output current, load output current being sampled successively, access the respective input of described MCU.
3. solar charging controller according to claim 2, it is characterized in that: described solar charging controller also comprises the lightning protection circuit for lightning protection, is connected between the positive and negative terminal of photovoltaic input.
4. solar charging controller according to claim 3, it is characterized in that: described solar charging controller also comprises overload protecting circuit, is connected between output sample circuit and the MCU.
5. each described solar charging controller according to claim 1-4, it is characterized in that: described solar charging controller also comprise for the communication interface circuit of external communication, the button that is used for arranging charging work arranges circuit and is used for the display circuit of display working condition, link to each other with the respective input of described MCU respectively.
6. solar charging controller according to claim 5 is characterized in that: the output of described anti-reverse testing circuit is connected with the reversal connection warning circuit of reporting to the police for reverse connection of accumulator.
7. each described solar charging controller according to claim 1-4, it is characterized in that: described solar charging controller also comprises the temperature sampling circuit for detection of the temperature of storage battery, is connected in the respective input of described MCU.
CN 201220413480 2012-08-20 2012-08-20 Solar charge controller Expired - Lifetime CN202759270U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220413480 CN202759270U (en) 2012-08-20 2012-08-20 Solar charge controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220413480 CN202759270U (en) 2012-08-20 2012-08-20 Solar charge controller

Publications (1)

Publication Number Publication Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102780250A (en) * 2012-08-20 2012-11-14 佛山市柏克新能科技股份有限公司 Solar charge controller
CN103915871A (en) * 2014-03-28 2014-07-09 安徽农业大学 Photovoltaic power management unit taking measurement and control nodes of agricultural Internet of things as orientation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102780250A (en) * 2012-08-20 2012-11-14 佛山市柏克新能科技股份有限公司 Solar charge controller
CN103915871A (en) * 2014-03-28 2014-07-09 安徽农业大学 Photovoltaic power management unit taking measurement and control nodes of agricultural Internet of things as orientation
CN103915871B (en) * 2014-03-28 2016-08-17 安徽农业大学 The photo-voltaic power supply administrative unit of facing agricultural Internet of Things measuring and controlling node

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Granted publication date: 20130227