Automobile charging pile control module
Technical Field
The invention relates to the field of intelligent charging of electric automobiles, in particular to an automobile charging pile control module.
Background
Electric automobile gradually gets into present society as new forms of energy vehicle, fills electric pile control module and also gradually develops as electric automobile closely related car. The existing automobile charging pile control module is connected to an electric automobile charging interface through a CC end to detect the charging current required by the electric automobile charging interface, but the charging interfaces of some European countries do not have the CC end, the charging can not be carried out through the CC end detection, different specifications of the charging pile are required due to the fact that the charging currents of different electric automobiles are inconsistent, different charging pile control modules are required, the types of stocks of the charging pile control modules are multiple, the stock pressure is large, the response time of the existing automobile charging pile control modules is slow when the existing automobile charging pile control modules break down in the charging process, and potential safety hazards exist.
Disclosure of Invention
In view of this, the present invention provides an automobile charging pile control module capable of setting a charging current, reducing an inventory pressure, and having a fast fault response time.
In order to achieve the above object, the present invention adopts such an automobile charging pile control module, which comprises a processor, an operational amplifier circuit, a signal conversion resistor network circuit, a charging current setting circuit, a driving circuit, an indicator light circuit, and a power circuit, wherein an output terminal of the power circuit is respectively connected to an input terminal of the operational amplifier circuit, an input terminal of the processor, and an input terminal of the driving circuit, an output terminal of the processor is respectively connected to an input terminal of the operational amplifier circuit, an input terminal of the driving circuit, and an input terminal of the indicator light circuit, an output terminal of the operational amplifier circuit is connected to the signal conversion resistor network circuit, and the signal conversion resistor network circuit is respectively connected to the processor and the charging current setting circuit,
the operational amplifier circuit comprises an operational amplifier U2, a resistor R1 and a resistor R9, wherein the non-inverting input end of the operational amplifier U2 is connected with the processor, the resistor R1 is connected with the resistor R9 in series, one end of the resistor R1 is connected with a high level, one end of the resistor R9 is grounded, the other end of the resistor R1 is connected with the inverting input end of the operational amplifier U2,
the signal conversion resistor network circuit comprises a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a transient voltage suppression diode TVS1 and a transient voltage suppression diode TVS2, wherein the resistor R10 and the resistor R11 are connected in series, one end of the resistor R10 is connected to the output end of an operational amplifier U2, one end of the resistor R11 is connected with a processor, one end of the resistor R13 is connected to the positive power supply end of the operational amplifier U2, the other end of the resistor R13 is connected to the processor, the transient voltage suppression diode TVS1 and the transient voltage suppression diode TVS2 are connected in series, one end of the transient voltage suppression diode TVS1 is connected to the other end of the resistor R10, one end of the resistor R12 is connected to one end of the resistor R13, the other end of the resistor R12 is connected to one end of the resistor R11, one end of the resistor R14 is connected to one end of the resistor R11, the other end of the resistor R14 is connected to the other end of the transient voltage suppression diode TVS1, the other end of the resistor R10 leads out a CP end, and the other end of the transient voltage suppression diode TVS1 leads out a GND end,
the charging current setting circuit comprises a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19 and a dial switch SW1, wherein the resistor R15, the resistor R16, the resistor R17, the resistor R18 and the resistor R19 are respectively connected to the dial switch SW1, the dial switch SW1 is connected to one end of a transient voltage suppression diode TVS2, and the other end of the transient voltage suppression diode TVS2 is grounded.
The processor detects the feedback signal of the electric automobile to control the charging of the electric automobile; the operational amplification circuit amplifies the output signal to the signal conversion resistance network circuit; the signal conversion resistance network circuit forms a circuit of a handshaking signal between the automobile charging pile and the electric automobile charging end when the automobile is charged; the charging current setting circuit is used for setting automobile charging piles with different charging current specifications to adapt to different electric automobiles; the driving circuit controls the on-off of the automobile charging power supply; the indicating lamp circuit displays the working state of the automobile charging pile control module; the power supply circuit provides appropriate operating voltages for the various circuits.
Above-mentioned to the condition that does not have electric automobile charging end and does not have the CC end, the car that takes charging current setting circuit fills electric pile control module is designed, the charging current of different cars is set up through adjusting dial switch switching different resistance values, through the different voltage class of treater discernment, so that the CP end outputs the confirmed signal of charging of different duty cycles, the car owner chooses the car that accords with own car charging current to fill electric pile control module when purchasing can, to the producer set up dial switch when dispatching from the factory can, reduce the stock pressure of producer, simultaneously, signal conversion resistance network circuit and charging current setting circuit are pure resistance circuit, do not have any delay components and parts, circuit response signal does not have the time delay, the requirement of quick response when guaranteeing the car to charge.
The invention is further provided that the power supply circuit comprises a self-resetting fuse FU, a piezoresistor RV, an EMC inductor L1, an AC/DC power supply module, a charge pump converter U3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5 and an inductor L2, wherein the piezoresistor RV is connected with an external alternating current power supply, the self-resetting fuse FU is connected on a fire line, the piezoresistor RV is connected with the EMC inductor L1, the EMC inductor L1 is connected to the input end of the AC/DC power supply module, the capacitor C1 and the capacitor C2 are connected in parallel to the output end of the AC/DC power supply module, the two ends of the capacitor C2 output +12V direct current voltage, the +12V direct current voltage is connected with the input end of the charge pump converter U3, the two ends of the capacitor C3 are respectively connected to a CAP + pin and a CAP-pin of the charge pump converter U3, one end of the capacitor C4 is grounded, the other end of the capacitor C4 is connected with the output end of the charge pump converter U3, the inductor L2 is connected in series with the output end of the charge pump converter U3, one end of the inductor L2 is grounded, and the other end of the inductor L2 is connected with the direct current voltage of the capacitor C5.
The power supply circuit further comprises a three-terminal regulator U4, wherein the input end of the three-terminal regulator U4 is connected with +12V direct current voltage, and the output end of the three-terminal regulator U4 outputs +5V direct current voltage.
The +12V direct current voltage provides a stable power supply for the driving circuit, the-12V direct current voltage provides a power supply voltage for the operational amplification circuit, and the +5V direct current voltage provides a power supply voltage for the processor and the operational amplification circuit.
The invention is further set that the driving circuit comprises a plurality of groups of same relay driving circuits, taking one group of relay driving circuit as an example, the relay driving circuit comprises a diode D1, a relay KA1, a triode Q4, a capacitor C6 and a resistor R2, one end of a coil of the relay KA1 is connected with +12V direct current voltage, the other end of the coil of the relay KA1 is connected with a collector electrode of the triode Q4, an emitting electrode of the triode Q4 is grounded, one end of the capacitor C6 is connected with a base electrode of the triode Q4, the other end of the capacitor C6 is grounded, one end of the resistor R2 is connected with a base electrode of the triode Q4, the other end of the resistor R2 is connected with an output end of the processor, and the relay KA1 is connected with an automobile power supply circuit.
The relay KA1 is conducted through a base signal of the processor trigger triode Q4, and an external charging power supply for the automobile is connected.
The invention is further arranged in such a way that a CC end is led out from one end of the transient voltage suppression diode TVS2, and the other end of the transient voltage suppression diode TVS2 is grounded.
The aforesaid is provided with the CC end, makes car fill electric pile control module also can be used to the electric automobile that the car end of charging has the CC end simultaneously, improves the commonality of product.
The invention is further configured with the processor having a MEGA328P model.
The invention is further configured such that operational amplifier U2 is of the type TP1271.
The invention further provides that the charge pump converter U3 is of the type TC7660.
The processor AD with the type of MEGA328P has the advantages of high sampling speed, response closing time of less than 100ms, strong anti-interference capability of an operational amplifier with the type of TP1271, precision in operational amplification and guarantee of sampling precision, few components required outside the charge pump converter with the type of TC7660, and reduction of production cost.
Drawings
Fig. 1 is a schematic block diagram of an embodiment of the present invention.
FIG. 2 is a schematic diagram of a processor circuit according to an embodiment of the invention.
Fig. 3 is a schematic diagram of an operational amplifier circuit, a signal conversion resistor network circuit, and a charging current setting circuit according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a power supply circuit according to an embodiment of the invention.
Fig. 5 is a schematic diagram of a power supply circuit according to an embodiment of the invention.
Fig. 6 is a schematic diagram of a driving circuit according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of a driving circuit according to an embodiment of the present invention.
Fig. 8 is a waveform diagram of a communication signal fed back by the CP side according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1-3, the invention is a car charging pile control module, comprising a processor, an operational amplifier circuit, a signal conversion resistance network circuit, a charging current setting circuit, a driving circuit, an indicator light circuit, and a power circuit, wherein an output terminal of the power circuit is respectively connected to an input terminal of the operational amplifier circuit, an input terminal of the processor, an input terminal of the driving circuit, and a charging terminal of an electric car, an output terminal of the processor is respectively connected to an input terminal of the operational amplifier circuit, an input terminal of the driving circuit, and an input terminal of the indicator light circuit, an output terminal of the operational amplifier circuit is connected to the signal conversion resistance network circuit, the signal conversion resistance network circuit is respectively connected to the processor and the charging current setting circuit, the signal conversion resistance network circuit is connected to the charging terminal of the electric car, and the model of the processor is MEGA328P, wherein,
the operational amplifier circuit a comprises an operational amplifier U2, a resistor R1 and a resistor R9, wherein the model of the operational amplifier U2 is TP1271, the non-inverting input end of the operational amplifier U2 is connected with a processor, the resistor R1 is connected with the resistor R9 in series, one end of the resistor R1 is connected with a high level, one end of the resistor R9 is grounded, the other end of the resistor R1 is connected with the inverting input end of the operational amplifier U2,
the signal conversion resistor network circuit b comprises a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a transient voltage suppression diode TVS1 and a transient voltage suppression diode TVS2, wherein the resistor R10 and the resistor R11 are connected in series, one end of the resistor R10 is connected to the output end of the operational amplifier U2, one end of the resistor R11 is connected with the processor, one end of the resistor R13 is connected to the positive power supply end of the operational amplifier U2, the other end of the resistor R13 is connected to the processor, the transient voltage suppression diode TVS1 and the transient voltage suppression diode TVS2 are connected in series, one end of the transient voltage suppression diode TVS1 is connected to the other end of the resistor R10, one end of the resistor R12 is connected to one end of the resistor R13, the other end of the resistor R12 is connected to one end of the resistor R11, one end of the resistor R14 is connected to one end of the resistor R11, the other end of the resistor R14 is connected to the other end of the transient voltage suppression diode TVS1, the other end of the resistor R10 leads out a CP end, and the other end of the transient voltage suppression diode TVS1 leads out an end to a GND,
the charging current setting circuit c comprises a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19 and a dial switch SW1, wherein the resistor R15, the resistor R16, the resistor R17, the resistor R18 and the resistor R19 are respectively connected to the dial switch SW1, the dial switch SW1 is connected to one end of a transient voltage suppression diode TVS2, and the other end of the transient voltage suppression diode TVS2 is grounded.
As shown in fig. 4 and 5, the power supply circuit includes a self-resetting fuse FU, a varistor RV, an EMC inductor L1, an AC/DC power supply module, a charge pump converter U3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, and an inductor L2, the model of the charge pump converter U3 is TC7660, the varistor RV connects with an external AC power supply, the self-resetting fuse FU is connected to a live wire, the varistor RV connects with the EMC inductor L1, the EMC inductor L1 connects with the input end of the AC/DC power supply module, the capacitor C1 and the capacitor C2 are connected in parallel to the output end of the AC/DC power supply module, the two ends of the capacitor C2 output +12V DC voltages (J1-1 and J1-2), the +12V DC voltage connects with the input end of the charge pump converter U3, the two ends of the capacitor C3 are connected to CAP + pin and CAP-pin of the charge pump converter U3 respectively, one end of the capacitor C4 is grounded, the other end of the capacitor C4 is connected with the output end of the charge pump converter U3, the three ends of the inductor L2 and the three ends of the inductor U5 are connected in series with the output of the DC voltage regulator U1-DC voltage regulator U4, and the three ends of the capacitor C4 are connected with the output of the three terminals of the DC voltage regulator U2, the DC voltage regulator U4.
As shown in fig. 6 and 7, drive circuit includes the same relay drive circuit of multiunit to one of them group relay drive circuit is the example, and relay drive circuit includes diode D1, relay KA1, triode Q4, electric capacity C6, resistance R2, the one end of relay KA1 coil is connected +12V direct current voltage, and triode Q4's collecting electrode is connected to the other end of relay KA1 coil, triode Q4's projecting pole ground connection, triode Q4's base is connected to electric capacity C6's one end, electric capacity C6's other end ground connection, triode Q4's base is connected to resistance R2's one end, and the other end of resistance R2 connects the output of treater, and relay KA1 connects on the car power supply line.
As shown in fig. 8, the CP end of the car charging pile control module feeds back different communication waveform data, which represent different signals, including a standby state, a ready signal, a charging start signal, a ventilation request signal, a fault signal, and a reliable grounding signal.