CN112848953A - Electric vehicle charging control system - Google Patents
Electric vehicle charging control system Download PDFInfo
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- CN112848953A CN112848953A CN202110135964.7A CN202110135964A CN112848953A CN 112848953 A CN112848953 A CN 112848953A CN 202110135964 A CN202110135964 A CN 202110135964A CN 112848953 A CN112848953 A CN 112848953A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
- B60L53/665—Methods related to measuring, billing or payment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an electric vehicle charging control system, which comprises a main control unit, a selection button module, a relay control module, a current detection module, a card swiping module and a coin inserting module, wherein the main control unit is connected with the selection button module; the selection button module is used for receiving a charging circuit signal selected by external input; the relay control module controls the corresponding relay to be powered on or powered off; the current detection module detects the charging current in the charging main loop in real time; the card swiping module deducts the electricity fee from the received IC card; when the coin module verifies that the coin is genuine and the face value of the coin, the corresponding relay is started to charge the electric vehicle connected in the charging main loop in which the coin module is positioned according to the charging duration corresponding to the coin face value according to the charging circuit triggering signal fed back by the selection button module. The system integrates two charging modes of card swiping and coin inserting, is flexible in charging mode, can adapt to the payment habits of different crowds, and meets the payment mode requirements required by charging users.
Description
Technical Field
The invention relates to an electric vehicle charging control system, and belongs to the technical field of automatic control.
Background
With the popularization of electric vehicles, more and more electric vehicles appear in residential districts, and how to manage and safely charge the electric vehicles becomes an important problem to be solved by the property management of the residential districts at present. At present, because the community property management is free of charging metering equipment, in order to charge an electric bicycle, an electric bicycle owner usually adopts a method of throwing a long temporary power line from a home window, so that the power line is randomly pulled in front of a unit building, and great hidden danger is brought to the safety of a community; still the car owner adopts the method to take off the storage battery and carry back home and charge, neither safe, also waste time and energy. Some districts set up charging power supplies for car owners to facilitate the car owners to charge, but because no metering equipment is provided, the charging amount is disputed all the time, and the property can not charge the electric charge in time.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a multi-path electric bicycle charging control system which can detect the charging current of a plurality of electric bicycles in a timing or real-time manner, and charges are paid in a card swiping or coin inserting manner, so that the charging and billing control of the electric bicycles in public places such as residential quarters is facilitated.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an electric vehicle charging control system comprises a main control unit, a selection button module, a relay control module, a current detection module, a card swiping module and a coin inserting module;
the selection button module is used for receiving a charging line signal selected by external input and feeding back the charging line signal to the main control unit;
the relay control module controls the corresponding relay to be powered on or powered off according to the received instruction of the main control unit, so that a charging main loop controlled by the relay is connected or disconnected, and an electric vehicle connected to the charging main loop is charged or powered off;
the current detection module is connected in the charging main loop, detects the charging current in the charging main loop in real time, inputs the detected signal into the main control unit, and calculates the charging amount and the corresponding electric charge by the main control unit;
the card swiping module is connected and communicated with the main control unit, and the electricity charge amount calculated by the main control unit is deducted from the received IC card through the card reading chip;
the coin-feed module feeds back the detected coin-feed signal to the main control unit, the main control unit executes a coin-checking detection program, when the coin is verified to be genuine coin and the face value thereof, the relay control module is controlled according to the trigger charging circuit signal fed back by the selection button module, and the corresponding relay is started to charge the electric vehicle connected in the charging main circuit where the relay is located according to the charging duration corresponding to the coin-feed face value.
Furthermore, the charging current detection module comprises a current transformer, two primary input ends of the current transformer are connected in a charging main circuit to collect charging current of the charging main circuit, two secondary output ends of the current transformer are connected in parallel with a sampling resistor, the sampling resistor converts induced alternating current charging current into alternating current voltage signals, the alternating current voltage signals are amplified by an operational amplifier, rectified and filtered to average into direct current level signals, and the direct current level signals are input to the main control unit.
Further, the relay control module comprises an optical coupling circuit and a relay; the control signal output by the main control unit is isolated by the optocoupler circuit and then connected to one end of the relay coil; the normally open contact of the relay is connected in the charging main loop, and when the coil of the relay is electrified or loses the electricity, the normally open contact is attracted or disconnected, so that the charging main loop is connected or disconnected.
Further, in the coin module, a photoelectric coupler is used for detecting a coin signal.
Further, when executing the coin checking detection program, comparing the coin checking detection program with the stored true coin, if the comparison result is inconsistent, judging the coin is a counterfeit coin, spitting out the counterfeit coin again, and not starting the charging program; if the comparison result is consistent, the coin is judged to be a genuine coin.
Further, the card swiping module is powered by 3.3V voltage and is connected with a main control chip of the main control unit through an SPI interface for communication, and the card swiping module comprises an RC522A card reading chip.
Further, when the card swiping module reads the IC card, a signal for starting a charging program is fed back to the main control unit, the main control unit controls the relay control module according to a trigger charging circuit signal fed back by the selection button module, and a corresponding relay is started to charge the electric vehicle;
when the electric vehicle is full or the selection button module receives a signal for triggering to close the charging circuit, the signal is fed back to the main control unit, the main control unit controls the relay control module to enable the corresponding relay to lose power, the electric vehicle is stopped to be charged, and the electric charge amount calculated by the main control unit is deducted from an IC card which is swiped by a charger through the RC522A card reading chip.
And further, the system also comprises a voice prompt module which converts the received charging amount calculated by the main control unit and the corresponding electric charge signal into a voice signal and broadcasts the voice signal.
Further, the system also comprises an LCD display module, wherein the LCD display module receives display indication signals from the main control unit and is used for displaying the charge amount calculated by the main control unit and the corresponding electric charge or coin-feed face value.
Furthermore, the selection button module, the relay control module and the current detection module are all in multiple paths.
Further, the main control unit adopts STC12C5a16S2 as the main control chip.
The invention achieves the following beneficial effects:
the charging control system of the electric vehicle integrates two charging modes of card swiping and coin inserting, has flexible charging mode, can adapt to the payment habits of different crowds, and meets the requirement of a charging user on the payment mode;
the system can simultaneously detect multi-path charging current in real time or cut off each path of charging, realizes the charging control of a plurality of electric vehicles at the same time, and solves the problems of unsafe charging, inaccurate charging and difficult charging of electric vehicles in public fields such as residential districts and the like;
drawings
FIG. 1 is a system block diagram of an embodiment of the present invention;
FIG. 2 is a circuit diagram of a current sensing module according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a relay control module according to an embodiment of the invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the charging control system for the electric vehicle of the present embodiment mainly comprises the following components: a charging control system of an electric vehicle is characterized by comprising a main control unit, a selection button module, a relay control module, a current detection module, a card swiping module, a coin inserting module and an LCD display module;
the selection button module is used for receiving a charging line signal selected by external input and feeding back the charging line signal to the main control unit;
the relay control module controls the corresponding relay to be powered on or powered off according to the received instruction of the main control unit, so that a charging main loop controlled by the relay is connected or disconnected, and an electric vehicle connected to the charging main loop is charged or powered off;
the current detection module is connected in the charging main loop, detects the charging current in the charging main loop in real time, inputs the detected signal into the main control unit, and calculates the charging amount and the corresponding electric charge by the main control unit;
the card swiping module is connected and communicated with the main control unit, and the electricity charge amount calculated by the main control unit is deducted from the received IC card through the card reading chip;
the coin-feed module feeds back a detected coin-feed signal to the main control unit, the main control unit executes a coin-checking detection program, and when the coin is verified to be genuine coin and the face value thereof, the main control unit controls the relay control module according to a trigger charging line signal fed back by the selection button module, and starts a corresponding relay to charge an electric vehicle connected in a charging main loop in which the relay is positioned according to the charging duration corresponding to the coin-feed face value;
the LCD display module receives a display indication signal from the main control unit and is used for displaying the charge amount calculated by the main control unit and the corresponding electric charge or coin-feed face value.
Under the control of the main control unit, the charging current charging control module and the charging current charging control module work in coordination with each other, and charging intelligent control and accurate charging of charging current are guaranteed.
In other embodiments, the multiple charging lines can be correspondingly controlled in a matching manner according to the selected model of the main control chip.
1. Master control unit
In consideration of the requirement of the system on the operation speed, in this embodiment, the STC12C5a16S2 is selected as the main control chip of the main control unit. The chip is a single clock/machine period (1T) singlechip manufactured by a macro crystal company, is a new generation 8051 singlechip with high speed, low power consumption and ultra-strong anti-interference performance, and has instruction codes completely compatible with the traditional 8051, but the speed is 8-12 times faster. The space of the on-chip program memory is 16KB, the data memory is integrated with 1024-byte extended RAM and 10-bit precision ADC besides 256-byte RAM, and the conversion speed can reach 250K/S.
According to the pin characteristics of the STC12C5a60S2 main control chip, in the design of this embodiment, 8 paths of selection button modules occupy 8 ports of the main control chip P0.0-P0.7, and receive externally input selected charging path number signals through the ports, the current detection module is connected to the ports P1.0 to P1.7 of the main control chip, and performs current detection on the charging path number correspondingly selected by the 8 paths of selection button modules, and after the detected signals are input into the internal ADC through the corresponding ports of the main control chip for conversion, calculates the charging amount and the corresponding electricity fee; the card swiping module occupies ports P2.0 to P2.3 and is used for being connected with the main control chip for communication, and the electric charge amount calculated by the main control chip is deducted from the bank card swiped by the charger through the card reading chip; the 8-path relay control module is controlled by output signals of ports P2.4-P2.6, and receives charging and power-off signals output by the main control chip through the ports; the LCD display module is connected with the ports P3.6 to P3.7 and P4.0 to P4.2, and receives display indication signals through the ports.
2. Charging current detection module
The charging current is detected by adopting a current transformer, and a specific circuit is shown in figure 2. Two primary input ends of a current transformer T2 are connected in a storage battery charging main loop to collect charging current of the storage battery charging main loop, a secondary end of the current transformer is connected in parallel with a sampling resistor R2, the sampling resistor R2 converts induced alternating current charging current into alternating current voltage signals, the alternating current voltage signals are amplified through an operational amplifier LM324 and rectified through a rectifier diode D2, a filter capacitor C4 filters the alternating current voltage signals to average the alternating current voltage signals into direct current level signals, the direct current level signals are finally sent to a main control chip of a main control unit for sampling, and the main control chip calculates charging amount and corresponding electricity charge.
3. Relay control module
The essence of the main control unit for controlling the charging power supply is to control the relay. One path of the relay control module circuit is shown in fig. 3. The control signal output by the main control unit is isolated by an optocoupler circuit U1, and is connected to one end of a relay coil after the drive capability is improved by current expansion through ULN2003 AN; the normally open contact of the relay is connected in a contactor coil loop of the storage battery charging main loop, when the relay coil is electrified, the normally open contact is attracted, the power supply is switched on, and the electric vehicle controlled by the relay control module is charged.
4. Coin module
Detecting a coin inserting signal by adopting a photoelectric coupler, rolling the coin to the photoelectric coupler through a pipeline after the coin is inserted, blocking a light beam, stopping a triode in the photoelectric coupler, outputting a high level, generating a falling edge after 74ls04 phase inversion, sending the falling edge to an interruption pin of a main control chip to generate interruption, executing a coin checking detection program, comparing the coin checking detection program with stored true coins, judging the coin to be a fake coin if the comparison result is inconsistent, re-ejecting the fake coin, and not starting a charging program; if the comparison result is consistent, the coin is judged to be true, the true coin is put into the coin warehouse, and a signal for starting a charging program and a chargeable duration signal corresponding to the coin of the denomination are fed back to the main control unit. When the main control unit receives a signal for starting a charging program and a chargeable duration signal corresponding to the coin of the denomination, the main control unit controls the relay control module according to a trigger charging line signal fed back by the selection button module, starts a corresponding relay to charge the electric vehicle connected in the charging line, and when the charging time of the electric vehicle reaches the charging duration, the main control unit controls the relay control module to enable the corresponding relay to lose power and stop charging the electric vehicle.
The mode of paying money by inserting coins through the coin inserting module is prepayment, so that a charger can start a charging program only by inserting coins first, the charger can predict and select charging time according to own requirements, correspondingly insert coins with corresponding amount, and the requirement of the charger for paying by using cash is met.
In order to simplify the related schemes such as the coin-checking detection program, the money received by the coin module is set as a coin in this embodiment, and may also include paper money in other embodiments.
5. Card swiping module
In order to facilitate charging and collecting payment, card swiping charging can be adopted besides a coin-feed mode. The card swiping module employs an RC522A card reading chip that fully integrates all types of passive contactless communication means and protocols at 13.56MHz, using advanced modulation and demodulation concepts. Supporting 14443A compatible transponder signals. The digital part processes ISO14443A frames and error detection. The module adopts 3.3V voltage power supply, can directly be connected with the main control chip of main control unit through the SPI interface and communicate. When the card swiping module reads the IC card, a signal for starting a charging program is fed back to the main control unit, the main control unit controls the relay control module according to a signal for triggering a charging line fed back by the selection button module, and the corresponding relay is started to charge the electric vehicle connected in the charging line. When the electric vehicle is full or the selection button module receives a signal for triggering to close the charging circuit, the signal is fed back to the main control unit, the main control unit controls the relay control module to enable the corresponding relay to lose power, the electric vehicle is stopped to be charged, and the charging expense amount calculated by the main control chip is deducted from an IC card which is swiped by a charger through the RC522A card reading chip.
The mode of paying by swiping the card through the card swiping module is that power is firstly used and then paid, a person who charges can judge the input charging current corresponding to the path by triggering the selection button module again at any time, and after the main control chip detects that the selection button module triggers a closing signal, an instruction signal is sent to the relay control module, the charging power supply corresponding to the path is closed, and the electric vehicle stops charging. The main control unit sends a display instruction signal to the LCD display module, the LCD display module displays the charging cost of the path at the moment, the cost can be accurately displayed in real time, and a charger pays by swiping a card, so that the situations that the cost cannot be accurately estimated, the pre-charging cost is high, and the actual charging time is short, and the charging is full of electric quantity, so that the cost is wasted are avoided.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An electric vehicle charging control system is characterized by comprising a main control unit, a selection button module, a relay control module, a current detection module, a card swiping module and a coin inserting module;
the selection button module is used for receiving a charging line signal selected by external input and feeding back the charging line signal to the main control unit;
the relay control module controls the corresponding relay to be powered on or powered off according to the received instruction of the main control unit, so that a charging main loop controlled by the relay is connected or disconnected, and an electric vehicle connected to the charging main loop is charged or powered off;
the current detection module is connected in the charging main loop, detects the charging current in the charging main loop in real time, inputs the detected signal into the main control unit, and calculates the charging amount and the corresponding electric charge by the main control unit;
the card swiping module is connected and communicated with the main control unit, and the electricity charge amount calculated by the main control unit is deducted from the received IC card through the card reading chip;
the coin-feed module feeds back the detected coin-feed signal to the main control unit, the main control unit executes a coin-checking detection program, when the coin is verified to be genuine coin and the face value thereof, the relay control module is controlled according to the trigger charging circuit signal fed back by the selection button module, and the corresponding relay is started to charge the electric vehicle connected in the charging main circuit where the relay is located according to the charging duration corresponding to the coin-feed face value.
2. The charging control system of claim 1, wherein the charging current detection module comprises a current transformer, two input terminals of a primary side of the current transformer are connected to the charging main circuit to collect the charging current of the charging main circuit, two output terminals of a secondary side of the current transformer are connected in parallel to a sampling resistor, the sampling resistor converts the induced alternating current charging current into an alternating current voltage signal, the alternating current voltage signal is amplified by the operational amplifier, rectified and filtered to average the alternating current voltage signal into a direct current level signal, and the direct current level signal is input to the main control unit.
3. The system of claim 1, wherein the relay control module comprises an optocoupler circuit and a relay; the control signal output by the main control unit is isolated by the optocoupler circuit and then connected to one end of the relay coil; the normally open contact of the relay is connected in the charging main loop, and when the coil of the relay is electrified or loses the electricity, the normally open contact is attracted or disconnected, so that the charging main loop is connected or disconnected.
4. The system as claimed in claim 1, wherein the coin module employs a photoelectric coupler to detect the coin signal.
5. The system according to claim 1 or 4, wherein when the coin checking program is executed, the coin checking program compares the coin with the stored genuine coins, if the comparison result shows that the coin is inconsistent, the coin is determined to be a counterfeit coin, the counterfeit coin is dispensed again, and the charging program is not started; if the comparison result is consistent, the coin is judged to be a genuine coin.
6. The charging control system of the electric vehicle as claimed in claim 1, wherein the card swiping module is powered by 3.3V and is connected with and communicates with a main control chip of the main control unit through an SPI interface, and comprises an RC522A card reading chip.
7. The charging control system of the electric vehicle as claimed in claim 6, wherein when the card swiping module reads the IC card, a signal for starting a charging program is fed back to the main control unit, and the main control unit controls the relay control module according to a signal for triggering a charging line fed back by the selection button module, and starts a corresponding relay to charge the electric vehicle;
when the electric vehicle is full or the selection button module receives a signal for triggering to close the charging circuit, the signal is fed back to the main control unit, the main control unit controls the relay control module to enable the corresponding relay to lose power, the electric vehicle is stopped to be charged, and the electric charge amount calculated by the main control unit is deducted from an IC card which is swiped by a charger through the RC522A card reading chip.
8. The system of claim 1, further comprising a voice prompt module for converting the received charge amount calculated by the main control unit and the corresponding electric charge signal into a voice signal and broadcasting the voice signal.
9. The charging control system of the electric vehicle as claimed in claim 1, further comprising an LCD display module, wherein the LCD display module receives a display indication signal from the main control unit, and is used for displaying the charging amount calculated by the main control unit and the corresponding electric charge or coin-feed denomination.
10. The system of claim 1, wherein the selection button module, the relay control module and the current detection module are all multiplexed.
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| CN202110135964.7A CN112848953A (en) | 2021-02-01 | 2021-02-01 | Electric vehicle charging control system |
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| CN202110135964.7A CN112848953A (en) | 2021-02-01 | 2021-02-01 | Electric vehicle charging control system |
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