CN213072130U - Photovoltaic power generation electric energy saturation automatic power-off system - Google Patents
Photovoltaic power generation electric energy saturation automatic power-off system Download PDFInfo
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- CN213072130U CN213072130U CN202020913225.7U CN202020913225U CN213072130U CN 213072130 U CN213072130 U CN 213072130U CN 202020913225 U CN202020913225 U CN 202020913225U CN 213072130 U CN213072130 U CN 213072130U
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Abstract
The utility model discloses a photovoltaic power generation electric energy saturation automatic power-off system, including linear lithium battery charging chip SL1053, its CC pin is coupled with resistance R4 in series, and the other end of resistance R4 is coupled with the charging input end, and charging chip SL 1053's power pin VDD is coupled with the charging input end and its ground pin GND ground connection sets up; a CC pin of the charging chip SL1053 is coupled with a PNP triode and is coupled with a base electrode of the PNP triode; the collector of the PNP triode is coupled with the charging input end; and the emitter is coupled with the lithium battery to be charged; a STAT2 pin of the charging chip SL1053 is coupled with a relay KT in series, the relay KT comprises an electromagnetic coil KT1 and a normally closed contact KT1, one end of the electromagnetic coil KT1 is coupled with a STAT2 pin of the charging chip SL1053, the other end of the electromagnetic coil KT1 is coupled with a load resistor R8, and the other end of the load resistor R8 is grounded; the normally closed contact KT1 is coupled in series with the charging main circuit; the utility model discloses have the effect of auto-power-off when charging saturation.
Description
Technical Field
The utility model belongs to the technical field of the photovoltaic power generation technique and specifically relates to a saturated automatic power-off system of photovoltaic power generation electric energy is related to.
Background
At present, photovoltaic power generation is a technology for directly converting light energy into electric energy by utilizing the photovoltaic effect of a semiconductor interface. The solar energy power generation system mainly comprises a solar panel (assembly), a controller and an inverter, and the main components are electronic components. The solar cells are connected in series and then are packaged and protected to form a large-area solar cell module, and then the photovoltaic power generation device is formed by matching with components such as a power controller and the like.
In the prior art, reference is made to a utility model patent with an authorization publication number of CN203193326U, which discloses a solar charger of a combined battery, comprising a solar panel and a shell; the solar cell panel comprises at least two groups of solar cell sets connected in parallel, and each solar cell set at least comprises a solar cell; the shell is provided with a charging output end and at least one plane; the solar cell panel is fixedly arranged on the plane; the inner cavity of the shell is provided with a charging module, a lithium battery and an output module; the solar cell panel, the charging module, the lithium battery, the output module and the charging output end are sequentially connected. By adopting the above scheme, the utility model discloses a solar cell panel charges to the lithium cell through the module that charges, by lithium cell output power supply, green has reduced the pollution of lead acid battery to the environment to solar cell integrated design, it is extensive to use, has the market perspective of preferred.
In the process of charging the rechargeable battery through the solar lithium battery, the automatic power-off function when the charging is finished can not be realized, so that the service life of the rechargeable battery is influenced due to over-saturated charging charge.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a photovoltaic power generation electric energy saturation auto-power-off system has the automatic technological effect that goes on the outage when the end of charging.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a photovoltaic power generation electric energy saturation automatic power-off system comprises a linear lithium battery charging chip SL1053, wherein a CC pin of the linear lithium battery charging chip SL1053 is coupled with a resistor R4 in series, the other end of the resistor R4 is coupled with a charging input end, a power supply pin VDD of the charging chip SL1053 is coupled with the charging input end, and a grounding pin GND of the charging chip SL1053 is grounded; a CC pin of the charging chip SL1053 is coupled with a PNP triode and is coupled with a base electrode of the PNP triode; the collector of the PNP triode is coupled with the charging input end; and the emitter is coupled with the lithium battery to be charged; the charging input end, the PNP triode and the lithium battery to be charged form a charging main circuit; a STAT2 pin of the charging chip SL1053 is coupled with a relay KT in series, the relay KT comprises an electromagnetic coil KT1 and a normally closed contact KT1, one end of the electromagnetic coil KT1 is coupled with a STAT2 pin of the charging chip SL1053, the other end of the electromagnetic coil KT1 is coupled with a load resistor R8, and the other end of the load resistor R8 is grounded; the normally closed contact KT1 is coupled in series to the charging main circuit.
Through adopting above-mentioned technical scheme, in normal charging process, the electric current is through the input that charges, relay KT's normally closed contact KT1 and PNP triode and final coupling are on waiting rechargeable battery, linear lithium cell charging chip SL1053 is coupled on main circuit and is monitored the circuit through its CC pin, when charging the end, linear lithium cell charging chip SL 1053's STAT2 pin is pulled up to the high level, solenoid KT1 gets a little control normally closed contact KT1 disconnection this moment, realize the automatic disconnection of the end circuit that charges, and is simple in operation convenient, the practical value of equipment has been increased.
The utility model discloses further set up to: the charging main circuit is coupled with a sampling resistor Rcs in series, an arbitrary pin between the sampling resistor Rcs and the lithium battery to be charged is coupled with a CS pin of a charging chip SL1053, and the sampling resistor Rcs is coupled with a sampling circuit in parallel.
By adopting the technical scheme, the sampling circuits are connected in parallel at the two ends of the sampling resistor Rcs, the sampling current information can be detected in real time through the sampling circuits, the adjustment of the magnitude of the charging input current is facilitated, and the operation is simple and convenient.
The utility model discloses further set up to: the sampling circuit comprises an operational amplifier which is coupled to pins at two ends of a sampling resistor Rcs in parallel, an output pin of the operational amplifier is coupled with a conversion resistor R7 in series, and the other end of the conversion resistor R7 is coupled with the single-chip microcomputer XMM1 for displaying.
The utility model discloses further set up to: the operational amplifier is an LM358 operational amplifier.
By adopting the technical scheme, the LM358 operational amplifier has the advantages of high direct-current voltage gain, wide unit gain frequency band, wide power supply voltage range and the like; and meanwhile, the output voltage swing is large.
The utility model discloses further set up to: a phase compensation unit is coupled in series between a positive input pin and an output pin of the operational amplifier.
By adopting the technical scheme, the compensation of the system for all interference or partial interference is realized through phase compensation, so that the measurement result is more accurate, and the practical value of the equipment is increased.
The utility model discloses further set up to: the phase compensation unit comprises a compensation resistor R5 coupled in series to the positive input end of the operational amplifier and a compensation capacitor C2 coupled in series to the other end of the compensation resistor R5, and the other end of the compensation capacitor C2 is coupled to the conversion resistor R7.
The utility model discloses further set up to: a STAT1 pin of the charging chip SL1053 is serially coupled with a load resistor R9, and the other end of the load resistor R9 is serially coupled with a light-emitting diode LED 1; the other end of the light emitting diode LED1 is grounded.
By adopting the technical scheme, in the normal working process, the STAT1 pin of the charging chip SL1053 is pulled up to a high level in the charging process, and the LED1 which is coupled in series with the pin is used for displaying light, so that the charging state can be conveniently grasped in real time.
The utility model discloses further set up to: two end pins of the light emitting diode LED1 are coupled in parallel with a light emitting diode LED 2.
Through adopting above-mentioned technical scheme, set up emitting diode LED2 and emitting diode LED2 and emitting diode LED1 parallel arrangement, the control that can carry out charging process equally when a set of emitting diode wherein damages is convenient for, and easy operation is convenient, has increased the practicality value of equipment.
To sum up, the utility model discloses a beneficial technological effect does:
1. in the normal charging process, current passes through a charging input end, a normally closed contact KT1 of a relay KT and a PNP triode and is finally coupled to a battery to be charged, a linear lithium battery charging chip SL1053 is coupled to a main circuit through a CC pin of the linear lithium battery charging chip SL1053 and monitors the circuit, when charging is finished, an STAT2 pin of the linear lithium battery charging chip SL1053 is pulled up to a high level, at the moment, an electromagnetic coil KT1 is in a point control mode to disconnect the normally closed contact KT1, the charging finishing circuit is automatically disconnected, the operation is simple and convenient, and the practical value of the device is increased;
2. the sampling circuit is connected in parallel at the two ends of the sampling resistor Rcs, sampling current information can be detected in real time through the sampling circuit, the adjustment of the magnitude of the charging input current is facilitated, and the operation is simple and convenient.
Drawings
FIG. 1 is a circuit schematic diagram of a charging main circuit according to an embodiment;
FIG. 2 is a circuit diagram of an embodiment of a highlighted charging process alert.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a photovoltaic power generation electric energy saturation auto-power-off system, including linear lithium battery charging chip SL1053, each pin function of linear lithium battery charging chip SL1053 is as follows:
a VDD pin, a power supply terminal;
a TS pin, a temperature monitoring input terminal, the input voltage of which must be between Vts1 and Vts2, otherwise, the battery temperature is considered to be out of the set range;
the STAT1 pin, which is pulled high during charging; after the charging is finished, the voltage is pulled down to a low level;
the STAT2 pin, which is pulled low during charging; after the charging is finished, the voltage is pulled up to a high level;
a GND pin and a ground terminal;
the CC pin is connected with the PNP transistor of the external adjusting tube;
and the charging current of the CS pin is determined by the voltage difference between the power supply and the CS pin, and the current sampling is carried out.
A STAT2 pin of the charging chip SL1053 is coupled with a relay KT in series, the relay KT comprises an electromagnetic coil KT1 and a normally closed contact KT1, one end of the electromagnetic coil KT1 is coupled with a STAT2 pin of the charging chip SL1053, the other end of the electromagnetic coil KT1 is coupled with a load resistor R8, and the other end of the load resistor R8 is grounded; the charging input end is coupled with a normally closed contact KT1 in series, and the other end of the normally closed contact KT1 is sequentially coupled with a sampling resistor Rcs, an NPN triode and a voltage regulator TL431 in series; the other end of the voltage stabilizing tube TL431 is electrically connected with a battery to be charged; the sampling resistor Rcs is coupled with the collector of the NPN triode in series; the voltage-stabilizing tube TL431 is connected in series with an emitting electrode of the PNP triode; the charging input end, the normally closed contact KT1, the PNP triode and the lithium battery to be charged form a charging main circuit.
A CC pin of the linear lithium battery charging chip SL1053 is coupled with a resistor R4 in series, the other end of the resistor R4 is coupled with a charging input end, a power supply pin VDD of the charging chip SL1053 is coupled with the charging input end, and a grounding pin GND of the charging chip SL1053 is grounded; the CC pin of the charging chip SL1053 is coupled with the base electrode of the PNP triode; the collector of the PNP triode is coupled with the charging input end; and the emitter is coupled with the lithium battery to be charged; pins at two ends of the sampling resistor Rcs are respectively coupled with a resistor R2 and a resistor R1, the other end of the resistor R1 is coupled with an LM358 operational amplifier, the positive input end of the LM358 operational amplifier is coupled with a resistor R2, and the negative input end of the LM358 operational amplifier is coupled with a resistor R1; a resistor R3 is further coupled to the negative input end of the LM358 operational amplifier, and the other end of the resistor R3 is grounded; a resistor R6 is coupled in series between the positive input end and the output end of the LM358 operational amplifier, two ends of the resistor R6 are coupled in parallel with a phase compensation unit, the phase compensation unit comprises a compensation resistor R5 coupled in series with the positive input end of the LM358 operational amplifier and a compensation capacitor C2 coupled in series with the other end of the compensation resistor R5, and the other end of the compensation capacitor C2 is coupled with the output end of the LM358 operational amplifier; the output end of the LM358 operational amplifier is coupled in series with a conversion resistor R7, and the other end of the conversion resistor R7 is coupled with a singlechip XMM 1.
Referring to fig. 2, a STAT1 pin of the charging chip SL1053 is coupled in series to a load resistor R9, and the other end of the load resistor R9 is coupled in series to a light emitting diode LED 1; the other end of the light emitting diode LED1 is grounded, pins at two ends of the light emitting diode LED1 are coupled with the light emitting diode LED2 in parallel, electromagnetic coils KT2 of the relay are coupled in series on the light emitting diode LED1 and the light emitting diode LED2, a light emitting diode LED3 is coupled in parallel at two ends of a series circuit of the light emitting diode LED2 and the electromagnetic coil KT2, and a normally open contact KT2 corresponding to the electromagnetic coil KT2 is coupled in series on the light emitting diode LED 3.
The implementation principle of the embodiment is as follows: when the initial test voltage of the battery to be charged is lower than a pre-charging threshold Vo, entering a pre-charging mode, when the voltage of the battery to be charged reaches Vo, entering a constant current charging mode, then charging in the constant voltage charging mode, gradually reducing the charging current, and finally finishing; during the charging process, the STAT1 pin is pulled up to a high level, and the light emitting diode LED1 and the light emitting diode LED2 emit light to carry out status indication; after charging is finished, the STAT2 pin is pulled up to high level, the electromagnetic coil KT1 is electrified to control the normally closed contact KT1 to be disconnected, and charging is stopped.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a photovoltaic power generation electric energy saturation auto-power-off system which characterized in that: the charging circuit comprises a linear lithium battery charging chip SL1053, wherein a CC pin of the linear lithium battery charging chip SL1053 is coupled with a resistor R4 in series, the other end of the resistor R4 is coupled with a charging input end, a power supply pin VDD of the charging chip SL1053 is coupled with the charging input end, and a grounding pin GND of the charging chip SL1053 is grounded; a CC pin of the charging chip SL1053 is coupled with a PNP triode and is coupled with a base electrode of the PNP triode; the collector of the PNP triode is coupled with the charging input end; and the emitter is coupled with the lithium battery to be charged; the charging input end, the PNP triode and the lithium battery to be charged form a charging main circuit; a STAT2 pin of the charging chip SL1053 is coupled with a relay KT in series, the relay KT comprises an electromagnetic coil KT1 and a normally closed contact KT1, one end of the electromagnetic coil KT1 is coupled with a STAT2 pin of the charging chip SL1053, the other end of the electromagnetic coil KT1 is coupled with a load resistor R8, and the other end of the load resistor R8 is grounded; the normally closed contact KT1 is coupled in series to the charging main circuit.
2. The photovoltaic power generation electric energy saturation automatic power-off system according to claim 1, characterized in that: the charging main circuit is coupled with a sampling resistor Rcs in series, an arbitrary pin between the sampling resistor Rcs and the lithium battery to be charged is coupled with a CS pin of a charging chip SL1053, and the sampling resistor Rcs is coupled with a sampling circuit in parallel.
3. The photovoltaic power generation electric energy saturation automatic power-off system according to claim 2, characterized in that: the sampling circuit comprises an operational amplifier which is coupled to pins at two ends of a sampling resistor Rcs in parallel, an output pin of the operational amplifier is coupled with a conversion resistor R7 in series, and the other end of the conversion resistor R7 is coupled with the single-chip microcomputer XMM1 for displaying.
4. The photovoltaic power generation electric energy saturation automatic power-off system according to claim 3, characterized in that: the operational amplifier is an LM358 operational amplifier.
5. The photovoltaic power generation electric energy saturation automatic power-off system according to claim 3, characterized in that: a phase compensation unit is coupled in series between a positive input pin and an output pin of the operational amplifier.
6. The photovoltaic power generation electric energy saturation automatic power-off system according to claim 5, characterized in that: the phase compensation unit comprises a compensation resistor R5 coupled in series to the positive input end of the operational amplifier and a compensation capacitor C2 coupled in series to the other end of the compensation resistor R5, and the other end of the compensation capacitor C2 is coupled to the conversion resistor R7.
7. The photovoltaic power generation electric energy saturation automatic power-off system according to claim 1, characterized in that: a STAT1 pin of the charging chip SL1053 is serially coupled with a load resistor R9, and the other end of the load resistor R9 is serially coupled with a light-emitting diode LED 1; the other end of the light emitting diode LED1 is grounded.
8. The photovoltaic power generation electric energy saturation automatic power-off system according to claim 7, characterized in that: two end pins of the light emitting diode LED1 are coupled in parallel with a light emitting diode LED 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020913225.7U CN213072130U (en) | 2020-05-25 | 2020-05-25 | Photovoltaic power generation electric energy saturation automatic power-off system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020913225.7U CN213072130U (en) | 2020-05-25 | 2020-05-25 | Photovoltaic power generation electric energy saturation automatic power-off system |
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| Publication Number | Publication Date |
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| CN213072130U true CN213072130U (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020913225.7U Active CN213072130U (en) | 2020-05-25 | 2020-05-25 | Photovoltaic power generation electric energy saturation automatic power-off system |
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- 2020-05-25 CN CN202020913225.7U patent/CN213072130U/en active Active
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