CN219394454U - Solar automobile charging controller - Google Patents
Solar automobile charging controller Download PDFInfo
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- CN219394454U CN219394454U CN202320256668.7U CN202320256668U CN219394454U CN 219394454 U CN219394454 U CN 219394454U CN 202320256668 U CN202320256668 U CN 202320256668U CN 219394454 U CN219394454 U CN 219394454U
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Abstract
The utility model discloses a solar automobile charging controller, which is characterized in that a processor compares bus voltage output by a boost main circuit with output voltage filtered by an input filter, calculates the duty ratio of PWM waves, and outputs corresponding PWM waves and comparison voltage to a PWM driving control circuit; the PWM driving control circuit adjusts the output voltage variation value of the boost main circuit according to the comparison voltage, and outputs a PWM driving signal to control the boost main circuit, so that the bus voltage is stabilized to be the voltage value required by realizing the maximum power point; the bus voltage is filtered by the output filter circuit to charge the lithium battery pack. Therefore, the utility model can stabilize the bus voltage transmitted to the lithium battery pack to the voltage value required by realizing the maximum power point, and reduce the energy loss in the process of transmitting the voltage output by the photovoltaic panel to the lithium battery pack, thereby enabling the solar energy conversion efficiency in the charging process of the lithium battery pack to reach more than 98%.
Description
Technical Field
The utility model belongs to the technical field of automobile design and manufacture, and particularly relates to a solar automobile charging controller.
Background
As the consumption of automobiles increases, the consumption of gasoline increases. And international energy crisis, fossil fuel resources are increasingly tense, and environmental pollution is aggravated, and the demand for alternative energy sources used by automobiles is increasing. In recent years, electric automobiles have become a trend of global vehicle development from the advantage of environmental protection. On the other hand, the solar energy can be used as new energy and renewable energy, is convenient to obtain, is safe and reliable, has no noise, no pollution and less restriction, and is very suitable for being converted into electric energy. Therefore, an automobile solar charging system utilizing solar energy as a substitute energy source is generated, and the solar electric automobile can collect sunlight through solar energy photovoltaics to convert the sunlight into electric energy to replace fossil fuel, so that adverse effects caused by energy crisis are avoided.
At present, the technical development of a solar charging system of a solar car has been greatly advanced, and the charging requirement of the car can be met. However, in the process of transmitting the voltage output by the photovoltaic panel to the lithium battery pack of the solar car, the MPPT controller (solar car charging controller) of the existing solar car solar charging system has a problem of a large amount of energy loss, which results in low solar energy conversion efficiency and thus a large amount of solar energy loss.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a solar car charging controller which improves the solar energy conversion efficiency of a lithium battery pack of a solar car during charging.
The technical scheme adopted by the utility model is as follows:
the utility model comprises an input filter, a boost main circuit, a first signal sampler, a second signal sampler, a processor, a PWM driving control circuit and an output filter; the input filter transmits the filtered output voltage to the boost main circuit to be converted into bus voltage; the signal sampler samples the output voltage filtered by the input filter and transmits the output voltage to the processor; the second signal sampler samples the bus voltage output by the boost main circuit and transmits the bus voltage to the processor; the processor compares the bus voltage output by the boost main circuit with the output voltage filtered by the input filter, calculates the duty ratio of the PWM wave, and outputs the corresponding PWM wave and comparison voltage Vh to the PWM drive control circuit; the PWM driving control circuit adjusts the output voltage variation value of the boost main circuit according to the comparison voltage and outputs a PWM driving signal to control the bus voltage output by the boost main circuit; and the bus voltage output by the boost main circuit is filtered by the output filter circuit and then output.
Preferably, the first signal sampler and the processor are both powered by an auxiliary power supply.
Preferably, the second signal sampler and the processor are respectively communicated with the upper computer through a CAN communication module, and the CAN communication module is powered by an auxiliary power supply; and the processor is connected with the upper computer through an RS-485 bus.
Preferably, the processor is of the type Intel 8088; pin 1 of the processor is grounded, pin 2 and pin 3 are respectively connected with positive pole V+ and negative pole V-of the auxiliary power supply, pin 4 outputs comparison voltage to the PWM drive control circuit, pin 5 outputs PWM wave to the PWM drive control circuit, pin 6 and pin 7 are connected with the upper computer, and pin 8 and pin 9 output voltage positive pole V out +sum voltage cathode V out Powering the PWM drive control circuit, both pins 10 and 11 are connected to the CAN communication module.
Preferably, the PWM driving control circuit includes a transistor K1, a transistor K2, a transistor K3, a transistor K4, and a transistor K5; the base electrode of the triode K3 is connected with the collector electrode of the triode K1; the base electrode of the triode K1 is connected with one end of a resistor R2, one end of a resistor R3, the base electrode of the triode K2 and the collector electrode of the triode K5; the emitter of the triode K1 is connected with one end of the resistor R1 and the emitter of the triode K2; the collector electrode of the triode K2 is connected with the base electrode of the triode K4; the collector of the triode K3 is connected with one end of the resistor R4 and the collector of the triode K4; the base electrode of the triode K5 is connected with one end of a resistor R5 and one end of a resistor R6; the other end of the resistor R2 is connected with a pin 8 of the processor, the other end of the resistor R3, the emitter of the triode K4, the emitter of the triode K5 and the other end of the resistor R6 are connected with a pin 9 of the processor and grounded, the emitter of the triode K3 is connected with a pin 4 of the processor, and one end of the resistor R1 is connected with a pin 5 of the processor; the other end of the resistor R5 is connected with the other end of the resistor R4 and outputs a PWM driving signal to the boost main circuit.
Preferably, the boost main circuit comprises a MOS tube Q1 and a MOS tube Q2; the grid electrode of the MOS tube Q1 is connected with the grid electrode of the MOS tube Q2 and connected with a PWM driving signal output by a PWM driving control circuit in parallel; the drain electrode of the MOS tube Q1 is connected with the source electrode of the MOS tube Q2 and one end of the inductor L; the other end of the inductor L is connected with one end of the capacitor C1 in parallel and is connected with the positive electrode of the output voltage after being filtered by the input filter; the other end of the capacitor C1 is connected with one end of the capacitor C2 and the source electrode of the MOS tube Q1, and is connected with the output voltage cathode after being filtered by the input filter; the other end of the capacitor C2 is connected with the drain electrode of the MOS tube Q2 and is used as a positive output end of bus voltage, and the negative output end of the bus voltage is connected with the negative electrode of the output voltage after being filtered by the input filter.
The utility model has the following beneficial effects:
the processor compares the bus voltage output by the boost main circuit with the output voltage filtered by the input filter, calculates the duty ratio of the PWM wave, and outputs the corresponding PWM wave and the comparison voltage to the PWM drive control circuit; the PWM driving control circuit adjusts the output voltage variation value of the boost main circuit according to the comparison voltage, and outputs a PWM driving signal to control the boost main circuit, so that the bus voltage output by the boost main circuit is stabilized to be a voltage value required by realizing the maximum power point; and the bus voltage output by the boost main circuit is filtered by the output filter circuit to charge the lithium battery pack. Therefore, the utility model can control the voltage in the process of converting solar energy into electric energy and storing the electric energy in the lithium battery pack, so that the bus voltage transmitted to the lithium battery pack is stabilized to a voltage value required by realizing a maximum power point, and the energy loss in the process of transmitting the voltage output by the photovoltaic panel to the lithium battery pack is reduced, thereby the solar energy conversion efficiency in the charging process of the lithium battery pack is more than 98%.
Drawings
Fig. 1 is a system configuration diagram of the present utility model.
FIG. 2 is a schematic diagram of a processor according to the present utility model.
Fig. 3 is a schematic diagram of a PWM driving control circuit according to the present utility model.
Fig. 4 is a schematic diagram of a boost main circuit in the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
As shown in fig. 1, a solar car charge controller comprises an input filter 2, a boost main circuit 3, a first signal sampler 4, a second signal sampler 5, a processor 6, a PWM drive control circuit 7 and an output filter 8; the input filter 2 is connected to the output end of the photovoltaic panel 1, and the output filter 8 is connected to the input end of the lithium battery pack 9. The input filter 2 filters the output voltage of the photovoltaic panel 1 and then transmits the filtered output voltage to the boost main circuit 3 to be converted into bus voltage; the first signal sampler 4 samples the output voltage filtered by the input filter 2 and transmits the output voltage to the processor 6; the second signal sampler 5 samples the bus voltage output by the boost main circuit 3 and transmits the bus voltage to the processor 6; the processor 6 compares the bus voltage output by the boost main circuit 3 with the output voltage filtered by the input filter 2, calculates the duty ratio of the PWM wave, and outputs the corresponding PWM wave and the comparison voltage Vh to the PWM drive control circuit 7; the PWM driving control circuit 7 adjusts the output voltage variation value of the boost main circuit according to the comparison voltage, and outputs a PWM driving signal to control the boost main circuit, so that the bus voltage output by the boost main circuit 3 is stabilized to be a voltage value required for realizing the maximum power point; the bus voltage output by the boost main circuit 3 is filtered by the output filter circuit 8 and then charges the lithium battery pack 9.
As a preferred embodiment, both the signal sampler one 4 and the processor 6 are powered by an auxiliary power supply 10.
As a preferred embodiment, the second signal sampler 5 and the processor 6 are respectively communicated with the upper computer 12 through a CAN communication module 11, and the CAN communication module 11 is powered by the auxiliary power supply 10; the processor 6 is connected with the upper computer 12 through an RS-485 bus; the second signal sampler transmits the bus voltage output by the boost main circuit 3 to an upper computer; the working state of the processor and the bus voltage output by the boost main circuit 3 are monitored by the upper computer.
As a preferred embodiment, as shown in FIG. 2, the processor model is Intel 8088; pin 1 of the processor is grounded, pin 2 and pin 3 are respectively connected with positive pole V+ and negative pole V-of auxiliary power supply 10, pin 4 outputs comparison voltage to PWM drive control circuit 7, pin 5 outputs PWM wave to PWM drive control circuit 7, pin 6 and pin 7 are connected with upper computer, and pin 8 and pin 9 output voltage positive pole V out +sum voltage cathode V out -powering the PWM drive control circuit, both pin 10 and pin 11 being connected to CAN communication module 11.
As a preferred embodiment, as shown in fig. 3, the PWM driving control circuit includes a transistor K1, a transistor K2, a transistor K3, a transistor K4, and a transistor K5; the base electrode of the triode K3 is connected with the collector electrode of the triode K1; the base electrode of the triode K1 is connected with one end of a resistor R2, one end of a resistor R3, the base electrode of the triode K2 and the collector electrode of the triode K5; the emitter of the triode K1 is connected with one end of the resistor R1 and the emitter of the triode K2; the collector electrode of the triode K2 is connected with the base electrode of the triode K4; the collector of the triode K3 is connected with one end of the resistor R4 and the collector of the triode K4; the base electrode of the triode K5 is connected with one end of a resistor R5 and one end of a resistor R6; the other end of the resistor R2 is connected with a pin 8 of the processor, the other end of the resistor R3, the emitter of the triode K4, the emitter of the triode K5 and the other end of the resistor R6 are connected with a pin 9 of the processor and grounded, the emitter of the triode K3 is connected with a pin 4 of the processor, and one end of the resistor R1 is connected with a pin 5 of the processor; the other end of the resistor R5 is connected with the other end of the resistor R4 and outputs a PWM driving signal to the boost main circuit.
As a preferred embodiment, as shown in fig. 4, the boost main circuit includes a MOS transistor Q1 and a MOS transistor Q2; the grid electrode of the MOS tube Q1 is connected with the grid electrode of the MOS tube Q2 and connected with a PWM driving signal output by a PWM driving control circuit in parallel; the drain electrode of the MOS tube Q1 is connected with the source electrode of the MOS tube Q2 and one end of the inductor L; the other end of the inductor L is connected with one end of the capacitor C1 in parallel and is connected with the positive electrode of the output voltage filtered by the input filter 2; the other end of the capacitor C1 is connected with one end of the capacitor C2 and the source electrode of the MOS tube Q1, and is connected with the negative electrode of the output voltage (namely, grounded) after being filtered by the input filter 2; the other end of the capacitor C2 is connected with the drain electrode of the MOS tube Q2 and is used as a positive output end of bus voltage, and a negative output end of the bus voltage is an output voltage negative electrode (namely, grounded) after being filtered by the input filter 2; the PWM driving control circuit outputs PWM driving signals to control the on-off of the MOS tube Q1 and the MOS tube Q2 of the boost main circuit, so that stable output of bus voltage is realized.
When the lithium battery pack is used, the input filter is connected to the output end of the photovoltaic panel, and the output filter is connected to the input end of the lithium battery pack. The input filter filters the output voltage of the photovoltaic panel and then transmits the filtered output voltage to the boost main circuit to be converted into bus voltage; the signal sampler samples the output voltage filtered by the input filter and transmits the output voltage to the processor; the second signal sampler samples the bus voltage output by the boost main circuit and transmits the bus voltage to the processor; the processor compares the bus voltage output by the boost main circuit with the output voltage filtered by the input filter, calculates the duty ratio of the PWM wave, and outputs the corresponding PWM wave and the comparison voltage to the PWM drive control circuit; the PWM driving control circuit adjusts the output voltage variation value of the boost main circuit according to the comparison voltage, and outputs a PWM driving signal to control the boost main circuit, so that the bus voltage output by the boost main circuit is stabilized to be a voltage value required by realizing the maximum power point; and the bus voltage output by the boost main circuit is filtered by the output filter circuit to charge the lithium battery pack.
Claims (6)
1. The utility model provides a solar automobile charge controller, includes input filter and treater, its characterized in that: the system also comprises a boost main circuit, a first signal sampler, a second signal sampler, a PWM driving control circuit and an output filter; the input filter transmits the filtered output voltage to the boost main circuit to be converted into bus voltage; the signal sampler samples the output voltage filtered by the input filter and transmits the output voltage to the processor; the second signal sampler samples the bus voltage output by the boost main circuit and transmits the bus voltage to the processor; the processor compares the bus voltage output by the boost main circuit with the output voltage filtered by the input filter, calculates the duty ratio of the PWM wave, and outputs the corresponding PWM wave and comparison voltage Vh to the PWM drive control circuit; the PWM driving control circuit adjusts the output voltage variation value of the boost main circuit according to the comparison voltage and outputs a PWM driving signal to control the bus voltage output by the boost main circuit; and the bus voltage output by the boost main circuit is filtered by the output filter circuit and then output.
2. A solar car charge controller according to claim 1, wherein: the first signal sampler and the processor are both powered by an auxiliary power supply.
3. A solar car charge controller according to claim 1, wherein: the second signal sampler and the processor are respectively communicated with the upper computer through a CAN communication module, and the CAN communication module is powered by an auxiliary power supply; and the processor is connected with the upper computer through an RS-485 bus.
4. A solar car charge controller according to claim 1, wherein: the model of the processor is Intel 8088; pin 1 of the processor is grounded, pin 2 and pin 3 are respectively connected with positive pole V+ and negative pole V-of the auxiliary power supply, pin 4 outputs comparison voltage to the PWM drive control circuit, pin 5 outputs PWM wave to the PWM drive control circuit, pin 6 and pin 7 are both connected with the upper computer, and the comparison voltage is ledPin 8 and pin 9 output voltage positive electrode V out +sum voltage cathode V out Powering the PWM drive control circuit, both pins 10 and 11 are connected to the CAN communication module.
5. A solar car charge controller according to claim 1, wherein: the PWM driving control circuit comprises a triode K1, a triode K2, a triode K3, a triode K4 and a triode K5; the base electrode of the triode K3 is connected with the collector electrode of the triode K1; the base electrode of the triode K1 is connected with one end of a resistor R2, one end of a resistor R3, the base electrode of the triode K2 and the collector electrode of the triode K5; the emitter of the triode K1 is connected with one end of the resistor R1 and the emitter of the triode K2; the collector electrode of the triode K2 is connected with the base electrode of the triode K4; the collector of the triode K3 is connected with one end of the resistor R4 and the collector of the triode K4; the base electrode of the triode K5 is connected with one end of a resistor R5 and one end of a resistor R6; the other end of the resistor R2 is connected with a pin 8 of the processor, the other end of the resistor R3, the emitter of the triode K4, the emitter of the triode K5 and the other end of the resistor R6 are connected with a pin 9 of the processor and grounded, the emitter of the triode K3 is connected with a pin 4 of the processor, and one end of the resistor R1 is connected with a pin 5 of the processor; the other end of the resistor R5 is connected with the other end of the resistor R4 and outputs a PWM driving signal to the boost main circuit.
6. A solar car charge controller according to claim 1, wherein: the boost main circuit comprises a MOS tube Q1 and a MOS tube Q2; the grid electrode of the MOS tube Q1 is connected with the grid electrode of the MOS tube Q2 and connected with a PWM driving signal output by a PWM driving control circuit in parallel; the drain electrode of the MOS tube Q1 is connected with the source electrode of the MOS tube Q2 and one end of the inductor L; the other end of the inductor L is connected with one end of the capacitor C1 in parallel and is connected with the positive electrode of the output voltage after being filtered by the input filter; the other end of the capacitor C1 is connected with one end of the capacitor C2 and the source electrode of the MOS tube Q1, and is connected with the output voltage cathode after being filtered by the input filter; the other end of the capacitor C2 is connected with the drain electrode of the MOS tube Q2 and is used as a positive output end of bus voltage, and the negative output end of the bus voltage is connected with the negative electrode of the output voltage after being filtered by the input filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320256668.7U CN219394454U (en) | 2023-02-20 | 2023-02-20 | Solar automobile charging controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320256668.7U CN219394454U (en) | 2023-02-20 | 2023-02-20 | Solar automobile charging controller |
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| Publication Number | Publication Date |
|---|---|
| CN219394454U true CN219394454U (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320256668.7U Active CN219394454U (en) | 2023-02-20 | 2023-02-20 | Solar automobile charging controller |
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| CN (1) | CN219394454U (en) |
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- 2023-02-20 CN CN202320256668.7U patent/CN219394454U/en active Active
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