CN112793450A

CN112793450A - An intelligent charging pile that can be returned to control electricity

Info

Publication number: CN112793450A
Application number: CN202110165849.4A
Authority: CN
Inventors: 李滔
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-05-14

Abstract

The invention discloses an intelligent charging pile with returnable power control, comprising a charging cabinet and a power grid interface integrated into the commercial power, the charging cabinet is provided with an interface integrated into the household power grid, an AC charging gun, a DC charging gun and an intelligent control screen, The charging cabinet is provided with an intelligent control circuit connected with the intelligent control screen and a household grid interface connected with the interface incorporated into the household grid, and an AC charging circuit is arranged in the charging cabinet between the grid interface and the AC charging gun, so A DC charging circuit is arranged between the grid interface and the DC charging gun in the charging cabinet, and a DC reverse charging circuit is arranged in the charging cabinet between the DC charging gun and the household grid interface; the present invention can satisfy the DC charging at the same time. And there are two ways of AC charging, with fast charging and slow charging. After charging is completed, when the power grid is powered off, the electric energy of the battery in the electric vehicle can be returned to the charging device through the charging pile, and integrated into the household power grid to achieve Energy storage power generation.

Description

Can return to accuse electricity intelligent charging stake

Technical Field

The invention belongs to the technical field of electric automobiles, and particularly relates to a reversible electricity control intelligent charging pile.

Background

With the gradual improvement of the industrialization degree of electric automobiles and the rapid promotion of the construction of charging infrastructures, the standardization of charging interfaces has received great attention from the automobile industry, the electric power industry, the electrical industry and other related industries at home and abroad, and has also received attention from government agencies at home and abroad.

The electric automobile charging connection device is a component for connecting an electric automobile and power supply equipment when the electric automobile is charged, and can also comprise a power supply interface, a vehicle interface, a cable control box and other components besides a cable; the alternating current charging device can supply energy to an on-board power grid of the motor vehicle or charge a traction battery of the motor vehicle; the ac charging device is configured to receive ac power from a power supply network and output dc power to an on-board power grid of a motor vehicle, while the dc charging device has advantages of fast charging and large power, and as electric vehicles are popularized and scaled up, charging poles are used in homes and rural areas, and it is required to make the charging poles have various charging functions and applicable types.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a reversible electric-control intelligent charging pile, which has charging capabilities of fast charging and slow charging through 2 modes that can simultaneously satisfy dc charging and ac charging, and can return electric energy of a storage battery in an electric vehicle to a charging device through the charging pile and be incorporated into a household power grid to realize energy storage type power generation when a power grid is powered off after charging is completed.

In order to achieve the purpose, the invention relates to a reversible electricity-controlling intelligent charging pile, which comprises a charging cabinet and a power grid interface which is merged into commercial power, wherein the charging cabinet is provided with a household power grid interface, an alternating current charging gun, a direct current charging gun and an intelligent control screen, an intelligent control circuit which is connected with the intelligent control screen and a household power grid interface which is connected with the household power grid interface are arranged in the charging cabinet, an alternating current charging circuit is arranged between the power grid interface and the alternating current charging gun in the charging cabinet, a direct current charging circuit is arranged between the power grid interface and the direct current charging gun in the charging cabinet, a direct current reversible charging circuit is arranged between the direct current charging gun and the household power grid interface in the charging cabinet,

the direct current charging circuit comprises an electric energy meter, a main switch with a leakage protection device, a rectifying unit, a transformer, a voltage stabilizer and a relay unit which are arranged between the power grid interface and the direct current charging gun and are sequentially connected;

the alternating current charging circuit comprises a current limiting switch and a main control relay, wherein the current limiting switch and the main control relay are arranged between the main switch with the leakage protection device and the alternating current charging gun and are connected with the direct current charging circuit in parallel;

the direct current return charging circuit comprises an inversion unit and a relay unit III which are arranged between the main switch with the leakage protection device and the direct current charging gun and are connected with the direct current charging circuit in parallel;

the intelligent control circuit comprises a secondary transformer, a voltage stabilizer II and a current limit switch I, wherein the secondary transformer, the voltage stabilizer II and the current limit switch I are connected between the transformer and the voltage stabilizer I and are connected with the direct current charging circuit in parallel;

the household power grid circuit comprises a voltage stabilizer III and a relay unit II which are connected between a transformer and a voltage stabilizer I and are connected with the direct current charging circuit in parallel.

In a preferred embodiment, a neutral line is provided in the grid interface, and the rectifying unit is connected to the neutral line and each phase output terminal of the grid interface at the same time.

In a preferred embodiment, the ac charging circuit further includes 3 sets of rectifiers, a dc voltage converter and an inverter unit I, which are sequentially connected and disposed between the main control relay and the ac charging gun, and each set of rectifiers is correspondingly connected to a phase output terminal of the grid interface and a neutral line.

In a preferred embodiment, the dc voltage converter comprises an IGBT tube group and a transformer booster connected in sequence, and 1 pair of the IGBT tubes are connected to the rectifier output end, wherein the collector of the other end of 1 IGBT tube is connected to the dc positive bus, and the emitter of the other end of the other 1 IGBT tube is connected to the dc negative bus.

In a preferred embodiment, a diode i is arranged in parallel between the collector and the emitter of the IGBT tube.

In a preferred embodiment, when any one of the ac charging circuit, the dc charging circuit and the dc recharging circuit is matched with the external connection device, and when the dc charging gun or the ac charging gun in the circuit is successfully matched with the external connection device, the relay unit on the charging circuit where the dc charging gun or the ac charging gun is located is closed, and the relay units on the other charging circuits are opened.

The intelligent charging system comprises a direct current charging gun or an alternating current charging gun, wherein the direct current charging gun or the alternating current charging gun is arranged on the left side and the right side of a charging cabinet, an upper partition plate and a lower partition plate are arranged on the upper portion in the charging cabinet, the upper partition plate and the lower partition plate divide the charging cabinet into a control chamber and a charging chamber, an intelligent control circuit is arranged in the control chamber, a vertical partition plate is arranged in the charging chamber, the partition plate divides the charging chamber into 2 independent bins, an alternating current charging circuit is arranged in 1 independent bin, and the direct current charging circuit and the direct current return charging circuit are arranged in the other 1 independent bin.

In a preferred embodiment, the charging cabinet is provided with a dc indicator light for indicating the charging operation of the dc circuit and an ac indicator light for indicating the charging operation of the ac circuit.

In a preferred embodiment, the intelligent control module is connected with an electric energy metering module and a data communication module,

the electric energy metering module is used for metering the function of charging electric energy degrees and performing the charging function,

and the data communication module is used for realizing the exchange between the data in the charging device and the internet, and achieving the functions of charging and controlling the charging device.

The invention has the beneficial effects that:

1. the reversible electricity-control intelligent charging pile has the charging functions of quick charging and slow charging by 2 modes of meeting direct current charging and alternating current charging at the same time, and can return the electric energy of a storage battery in an electric automobile to the charging device and be merged into a household power grid through the charging pile when the power grid is powered off after the charging is finished, so that the energy-storage type power generation is realized.

2. The reversible electricity-control intelligent charging pile is provided with two charging guns through the alternating current-direct current charging device, wherein one gun is a direct current charging gun (quick charging) and the other gun is an alternating current charging gun (slow charging); the two guns can be used for the charging function of the electric automobile and can also realize the power return function.

3. The invention discloses a reversible electricity-control intelligent charging pile, which is provided with a direct-current charging module and a high-power inverter module, and also comprises a power supply protection module, a voltage-stabilizing protection module, an electric energy metering module, a data communication module, a system intelligent control module and a power supply change-over switch in an alternating-current and direct-current charging device.

Wherein the direct current charging module: after a commercial power alternating current power supply is rectified into a direct current power supply, the electric automobile is quickly charged through a direct current gun.

High-power inverter module: the electric energy of the storage battery in the electric automobile is inverted into an alternating current power supply and is merged into a power grid after being returned by the direct current charging gun, when the direct current charging gun is inserted into an electric automobile socket, the electric energy of the storage battery in the electric automobile is returned to the charging device by the direct current charging gun, is converted into the alternating current electric energy by the high-power inverter through the automatic change-over switch, and is finally merged into the power grid to realize energy storage type power generation.

The power protection module: automatic transfer switching action within the charging device: the power supply condition is detected, and the commercial power supply and the power return power supply are switched, so that the power supply is safer and more reliable, the power supply safety is not affected by the disorder of the power supply, and the charging device and the electric automobile are protected.

A voltage stabilizer module: after the electric energy returned by the electric automobile is converted into alternating current electric energy, the alternating current electric energy is converted into the alternating current electric energy, and the alternating current electric energy is connected into a household power grid through the voltage stabilizing module after having the same voltage as the commercial power.

Electric energy metering module: the function of measuring the number of the charging electric energy degrees and the function of measuring the number of the return electric energy degrees are carried out, and then the function of charging is carried out through the intelligent control module.

A data communication module: the data in the charging device is exchanged with the internet, and the functions of charging and controlling the charging device are achieved.

4. The reversible electricity-control intelligent charging pile is provided with a household version and a commercial version, wherein the household version power is about 7-14kW, and the commercial version power is 15-60 KW; the invention can convert the electric energy stored by the electric automobile into alternating current 220V and 380V mains supply to be used by a household power grid, thereby achieving the effects of peak clipping, valley filling, balancing day and night electric power, saving energy and reducing emission.

Drawings

In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:

fig. 1 is a schematic structural diagram of a reversible electricity-controlling intelligent charging pile according to the present invention;

fig. 2 is a circuit framework diagram of the reversible electric-control intelligent charging pile according to the invention;

FIG. 3 is a circuit framework diagram of another embodiment of the intelligent charging pile capable of controlling electricity in a returning manner according to the present invention

Fig. 4 is a circuit diagram of a dc voltage converter in the reversible electric-control intelligent charging pile according to the present invention;

FIG. 5 is a circuit diagram of an inverter unit in the reversible power-controlled intelligent charging pile according to the present invention;

fig. 6 is a circuit framework diagram of the reversible electric-control intelligent charging pile according to the invention.

Reference numerals: 1-a charging cabinet; 2-a grid interface; 3-alternating current charging gun; 4-a direct current charging gun; 5-a household power grid interface; 6-emergency stop button; 7-a direct current indicator light; 8-alternating current indicator light; 9-intelligent control screen; 10-grid-connected change-over switch; 11-temporary charging change-over switch; 12-a rectifying unit; 13-a voltage regulator; 14-an inverter unit; 15-a relay unit; 16-a voltage transformation step-down transformer; 17-voltage stabilizer I; 18-relay unit I; 19-relay unit II; 20-a rectifier; 21-a direct current voltage converter; 22-inversion unit I; 23-a main control relay; 24-a current limit switch; 25-the main switch is provided with a leakage protection device; 26-an electric energy meter; 27-a voltage transformation booster; 28-IGBT tube group; 29-secondary step-down transformer; 30-current limit switch I; 31-an intelligent control circuit; 32-relay unit III; 33-transformation booster I.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 to 6 are schematic diagrams of the reversible electric-control intelligent charging pile according to the invention; the invention relates to a reversible electricity-controlling intelligent charging pile, which comprises a charging cabinet 1 and a power grid interface 2 merging with commercial power, wherein the charging cabinet 1 is provided with a household power grid interface 5, an alternating current charging gun 3, a direct current charging gun 4 and an intelligent control screen 9, an intelligent control circuit 31 connected with the intelligent control screen 9 is arranged in the charging cabinet 1, an alternating current charging circuit is arranged between the power grid interface 2 and the alternating current charging gun 3 in the charging cabinet 1, a direct current charging circuit is arranged between the power grid interface 2 and the direct current charging gun 4 in the charging cabinet 1, a direct current reverse charging circuit is arranged between the direct current charging gun 4 and the household power grid interface 5 in the charging cabinet 1,

the direct-current charging circuit comprises an electric energy meter 26, a main switch belt leakage protection device 25, a rectifying unit 12, a transformer 16, a voltage stabilizer I17 and a relay unit I18 which are arranged between the power grid interface 2 and the direct-current charging gun 4 and are sequentially connected;

the alternating current charging circuit comprises a current limiting switch 24 and a main control relay 23 which are arranged between the main switch with the leakage protection device 25 and the alternating current charging gun 3 and are connected with the direct current charging circuit in parallel;

the direct current return charging circuit comprises an inverter unit 14 and a relay unit III32 which are arranged between the main switch with the leakage protection device 25 and the direct current charging gun 4 and are connected with the direct current charging circuit and the alternating current charging circuit in parallel;

the intelligent control circuit comprises a secondary transformer 30, a voltage stabilizer II and a current limiting switch I31, wherein the secondary transformer 30 is connected between the transformer 16 and the voltage stabilizer I17 and is connected with the direct current charging circuit in parallel;

the domestic network circuit comprises a voltage regulator III and a relay unit II19 connected between the transformer 16 and the voltage regulator I17 and connected in parallel with the dc charging circuit.

This embodiment is provided with two guns that charge on cabinet 1 charges, one is the direct current rifle that charges, one is the interchange rifle that dashes, the cabinet body openly is provided with emergency stop button 6, direct current pilot lamp 7, alternating current pilot lamp 8, intelligent control screen 9, change over switch 10 and the change over switch 11 that faces charging of being incorporated into the power networks, wherein direct current rifle or the setting of alternating current rifle that charges are in the cabinet left and right sides that charges, upper and lower baffle is provided with in the cabinet that charges, upper and lower baffle will charge and separate into control room and charging chamber in the cabinet, intelligent control circuit sets up in the control room, be provided with vertical baffle in the charging chamber, the baffle will charge the room and separate into 2 independent storehouses, alternating current charging circuit sets up in 1 independent storehouse wherein, direct current charging circuit and direct current return charging circuit set up in 1 independent storehouse in addition.

The alternating current charging state: when the electric automobile is charged with alternating current, the alternating current charging gun 3 is in butt joint with a charging interface of the electric automobile, so that an alternating current charging circuit is matched with an external connecting device, a main control relay 23 on the charging circuit where the alternating current charging gun is located is closed, a direct current charging circuit and a relay unit I18 and a relay unit III32 on a direct current return charging circuit are disconnected, an alternating current indicator light 8 works, alternating current enters the electric automobile through an electric energy meter 26, a main switch with a leakage protection device 25, a current limiting switch 24, a main control relay 23 and the alternating current charging gun 3, and then a storage battery is charged through a vehicle-mounted charger in the electric automobile;

a direct current charging state: when the electric automobile is charged by direct current, the direct current charging gun is in butt joint with a charging interface of the electric automobile, so that a direct current charging circuit is matched with an external connecting device, a relay unit I18 on the charging circuit where the direct current charging gun is located is closed, a main control relay 23 and a relay unit III32 on an alternating current charging circuit and a direct current return charging circuit are disconnected, a direct current indicator lamp 7 works, and alternating current is rectified into direct current through an electric energy meter 26, a main switch with a leakage protection device 25, a main control relay I and a rectification unit 12; the voltage transformation voltage reducer 16, the voltage stabilizer I17, the relay unit I18 and the direct current charging gun 3 enter the electric automobile to charge the storage battery;

grid-connected charge return state: the method comprises the following steps that the storage battery is charged again, a direct current charging gun is in butt joint with a charging interface of an electric receiving vehicle, a direct current charging circuit is matched with an external connecting device by operating a grid-connected change-over switch 10, a relay unit III32 on the charging circuit where the direct current charging gun is located is closed, a relay unit II19 on a household circuit is closed, a main control relay 23 and a relay unit I18 on the alternating current charging circuit and the direct current charging circuit are disconnected, and direct current in the storage battery is converted into alternating current through the direct current charging gun, the relay unit III32, an inverter unit 14, the main control relay I and a rectifying unit 12 to be converted into direct current; the voltage transformation voltage reducer 16 reduces the voltage, and the relay unit II19 enters a household appliance on a household circuit for use;

temporary direct current returns to a charging state: the power failure of the city network, the back charging of the storage battery, the direct current rush gun is butted with the charging interface of the electric receiving vehicle, the direct current back charging circuit is matched with an external connecting device by operating the charging change-over switch 11, at the moment, the direct current rush gun is connected between the voltage transformation step-down device 16 and the voltage stabilizer I17 through the relay unit 15, the voltage transformation step-up device I33 and the voltage stabilizer 13 and is connected with the direct current charging circuit in parallel, the voltage transformation step-down device 16 is disconnected with the rectifying unit 12, the relay unit 15 on the back charging circuit where the direct current charging gun is located is closed, the relay unit II19 on the household circuit is closed, the main control relay 23, the relay unit I18 and the relay unit III32 on the alternating current charging circuit, the direct current charging circuit and the direct current back charging circuit are all disconnected, the direct current in the storage battery passes through the direct current rush gun 4, the relay, The relay unit II19 is used by household appliances on a household circuit;

temporary alternating current return to a charging state: the power failure of the city network, the battery is returned and charged, the alternating current rush power gun is butted with a charging interface of an electric receiving vehicle, the charging change-over switch 11 is operated to enable the alternating current return charging circuit to be matched with an external connecting device, the main switch is disconnected, the main control relay 23 on the return charging circuit where the alternating current rush power gun is located is closed, the relay unit II19 on the household circuit is closed, the direct current charging circuit, the direct current return charging circuit and the direct current return charging circuit are all disconnected with the relay unit I18, the relay unit III32 and the relay unit 15 on the return charging circuit, and the direct current in the storage battery is converted into alternating current through the inverter on the electric vehicle, the transformation booster II, the alternating current rush power gun 3, the main control relay 23, the current limiting switch 24, the rectifying unit 12, the transformer 16 and the relay unit II19 and enters household.

This embodiment is through satisfying 2 kinds of modes that direct current charges and alternating current charge simultaneously, possesses the charge that fills soon and fill slowly and can, after the completion of charging, during the electric wire netting outage, can return charging device with the electric energy of battery in the electric automobile in through filling electric pile, merges domestic electric wire netting, realizes energy storage formula electricity generation.

In a preferred embodiment, a neutral line is disposed in the grid interface 2, and the rectifying unit 12 is simultaneously connected to the output end of each phase of the grid interface and the neutral line.

In a preferred embodiment, the ac charging circuit further includes 3 sets of rectifiers 20, a dc voltage converter 21 and an inverter unit I22, which are sequentially connected and disposed between the main control relay and the ac charging gun, each set of rectifier 20 is correspondingly connected to a phase output end of the grid interface and a neutral line, the structure of this embodiment is favorable for rectifying the ac power to the dc power, and then the ac power is inverted to the ac power after voltage transformation and voltage boosting, and the ac power enters the electric vehicle through the ac charging gun.

In a preferred embodiment, the dc voltage converter 21 includes an IGBT tube group 28 and a transformer booster 27 connected in sequence, the output end of the rectifier 28 is connected with 1 pair of the IGBT tubes, wherein the collector of the other end of 1 IGBT tube is connected to a dc positive bus, and the emitter of the other end of the other 1 IGBT tube is connected to a dc negative bus.

In a preferred embodiment, a diode I is arranged between the collector and the emitter of the IGBT tube in parallel, and the structure is favorable for protecting the IGBT tube and prolonging the service life of the IGBT tube.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. An intelligent charging pile that can be returned to control electricity, comprising a charging cabinet and a grid interface that is incorporated into commercial power, characterized in that: the charging cabinet is provided with an interface that is incorporated into the home grid, an AC charging gun, a DC charging gun and an intelligent control The charging cabinet is provided with an intelligent control circuit connected with the intelligent control screen and a household grid interface connected with the interface incorporated into the household grid, and an AC charging circuit is arranged in the charging cabinet between the grid interface and the AC charging gun , a DC charging circuit is arranged between the grid interface and the DC charging gun in the charging cabinet, and a DC reverse charging circuit is arranged in the charging cabinet between the DC charging gun and the household grid interface,

The DC charging circuit includes an electric energy meter, a main switch with leakage protection device, a rectifier unit, a transformer, a voltage stabilizer and a relay unit, which are arranged between the grid interface and the DC charging gun and are connected in sequence;

The AC charging circuit includes a current limit switch and a main control relay arranged between the main switch with leakage protection device and the AC charging gun and connected in parallel with the DC charging circuit;

The DC charging circuit includes an inverter unit and a relay unit III which are arranged between the main switch with leakage protection device and the DC charging gun and are connected in parallel with the DC charging circuit and the AC charging circuit;

The intelligent control circuit includes a secondary transformer, a voltage regulator II and a current limit switch I connected between the transformer and the voltage regulator I and connected in parallel with the DC charging circuit;

The home grid circuit includes a voltage stabilizer III and a relay unit II connected between the transformer and the voltage stabilizer I and connected in parallel with the DC charging circuit.

2 . The intelligent charging pile with returnable power control according to claim 1 , wherein the grid interface is provided with a neutral wire, and the rectifier unit is simultaneously connected to the output terminal of each phase and the neutral wire of the grid interface. 3 . Sexual connection.

3 . The intelligent charging pile with returnable power control according to claim 2 , wherein the AC charging circuit further comprises 3 groups of rectifiers connected in sequence and arranged between the main control relay and the AC charging gun. 4 . , DC voltage converter and inverter unit I, each group of rectifiers is correspondingly connected with a phase output terminal of the grid interface and a neutral line.

4 . The intelligent charging pile with returnable power control according to claim 3 , wherein the DC voltage converter comprises an IGBT tube group and a transformer booster which are connected in sequence, and the output end of the rectifier is connected with a 1 . 5 . For the IGBT tubes, the collector at the other end of one IGBT tube is connected to the DC positive busbar, and the emitter at the other end of the other IGBT tube is connected to the DC negative busbar.

5 . The intelligent charging pile with returnable power control according to claim 4 , wherein a diode I is arranged in parallel between the collector and the emitter of the IGBT tube. 6 .

6 . The intelligent charging pile with returnable power control according to any one of claims 1 to 5 , wherein any one of the AC charging circuit, the DC charging circuit and the DC return charging circuit is connected to the outside. 7 . When the device is matched, and the DC charging gun or AC charging gun and the external connection device in the circuit are successfully matched, the relay unit on the charging circuit where the DC charging gun or the AC charging gun is located is closed, and the relay units on other charging circuits are disconnected.

7 . An electric vehicle with a reversible power supply according to claim 6 , wherein the DC charging gun or the AC charging gun is arranged on the left and right sides of the charging cabinet, and upper and lower partitions are arranged in the upper part of the charging cabinet. 8 . , the upper and lower partitions divide the charging cabinet into a control room and a charging room, the intelligent control circuit is arranged in the control room, and a vertical partition is arranged in the charging room, and the partition divides the charging room into two Independent compartments, the AC charging circuit is arranged in one of the independent compartments, and the DC charging circuit and the DC return charging circuit are arranged in the other independent compartment.

8 . The intelligent charging pile with returnable power control according to claim 1 , wherein the charging cabinet is provided with a DC indicator light for indicating the charging operation of the DC circuit and an AC indicator for indicating the charging operation of the AC circuit. 9 . indicator light.

9 . The intelligent charging pile with returnable power control according to claim 1 , wherein the intelligent control module is connected with an electric energy metering module and a data communication module, 10 .

The electric energy metering module is used for the function of measuring the degree of charging electric energy and performing the billing function,

The data communication module is used to realize the exchange of data in the charging device with the Internet, so as to achieve the functions of charging and controlling the charging device.