CN216268713U - Electric automobile with reversible power supply - Google Patents

Abstract

The utility model discloses a reversible power supply electric automobile which comprises an automobile body, a battery pack, a controller and a charging circuit, wherein a direct current charging interface, a direct current inverse charging interface, an alternating current charging interface and an alternating current return charging interface are arranged on the automobile body; according to the utility model, the direct-current charging interface, the alternating-current power supply interface and the direct-current power supply interface are arranged, the relay is used for controlling the charging interface to be communicated with the charging pile for conducting, so that the electric automobile has the charging capacity of quick charging and slow charging, and after the charging is finished and the power grid is powered off, the electric energy of the battery pack in the electric automobile is returned to the charging pile or other electric automobiles through the inverter and is merged into the household power grid, so that the energy storage type power generation is realized.

Description

A reversible power supply electric vehicle

technical field

The utility model belongs to the technical field of electric vehicles, in particular to an electric vehicle with a reversible power supply.

Background technique

With the gradual improvement of the degree of industrialization of electric vehicles and the rapid advancement of the construction of charging infrastructure, the standardization of charging interfaces has received great attention from the domestic and foreign automotive industry, power industry, electrical industry and other related industries, as well as domestic and foreign government agencies. of attention.

The electric vehicle charging connection device refers to the components that connect the electric vehicle and the power supply equipment when the electric vehicle is charging. In addition to the cable, it may also include the power supply interface, the vehicle interface, the control box on the cable and other components; the AC charging device can be connected to the AC charging device. supplying energy to an on-board electrical system of a motor vehicle or charging a traction battery of the motor vehicle; the alternating-current charging device is configured to receive alternating current from a power supply network and output direct current to the on-board electrical system of the motor vehicle, and the direct-current charging device has With the advantages of fast charging and high power, with the popularization and scale expansion of electric vehicles, the domestic and rural charging piles need to have a variety of charging functions and applicable types.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present utility model is to provide an electric vehicle with a reversible power supply, the electric vehicle with a reversible power supply is provided with a DC charging interface, an AC charging interface, an AC power supply interface and a DC power supply interface, and uses a relay to control charging. The interface is connected with the charging pile to conduct electricity, so that the electric vehicle can be charged with fast charging and slow charging. After the charging is completed, when the power grid is powered off, the electric energy of the battery pack in the electric vehicle is returned to the charging pile or other electric vehicles through the inverter. It is integrated into the household grid to realize energy storage power generation.

In order to achieve the above purpose, the utility model is an electric vehicle with a reversible power supply, comprising a vehicle body, a battery pack, a controller and a charging circuit, and the vehicle body is provided with a DC charging interface, a DC reverse charging interface, an AC charging interface and an AC recharge interface, the charging circuit includes an AC recharge circuit, a DC recharge circuit, an AC recharge circuit, and a DC recharge circuit that are connected to the positive and negative electrodes of the battery pack and are arranged in parallel;

The AC charging circuit includes a rectifier unit, a transformer, an overvoltage and undervoltage protection switch, and a relay unit, which are arranged between the AC charging interface and the battery pack and are connected in sequence;

The DC charging circuit includes an overvoltage and undervoltage protection switch 1 and a relay unit 1 connected in sequence between the DC charging interface and the battery pack;

The DC recharge circuit includes a relay unit III, a voltage transformer booster and a voltage stabilizer arranged between the battery pack and the DC recharge interface and connected in sequence;

The AC recharging circuit includes a relay unit II, a DC voltage converter and an inverter which are arranged between the battery pack and the AC charging interface and are connected in sequence.

Further, the battery packs are arranged in 2 rows, the battery packs in the 2 rows are arranged on the vehicle body site and are connected in series in sequence, and both ends of the battery packs in the 2 rows are respectively close to the rear trunk of the vehicle body and the engine compartment at the front end of the vehicle body.

Further, a rear installation room is arranged at the rear of the vehicle body near the trunk, and a front installation room is arranged at the front end of the vehicle body near the engine compartment. The inverter and the relay unit III, the transformer booster and the voltage stabilizer in the DC recharge circuit are arranged in the front installation room, and the rectifier unit, transformer, overvoltage and undervoltage protection switch and relay unit in the AC charging circuit and The overvoltage and undervoltage protection switch I and the relay unit I in the DC charging circuit are arranged in the rear installation room.

Further, the DC charging interface is arranged on the side wall of the rear installation room near the driver's seat, the DC reverse charging interface is arranged on the side wall of the front installation room near the driver's seat, and the AC reverse charging interface is arranged on the side wall of the front installation room. On the side wall of the front installation room away from the driver's seat, the AC charging interface is arranged on the side wall of the rear installation room away from the driver's seat.

Further, when any one of the AC charging circuit, the DC charging circuit, the AC reverse charging circuit and the DC reverse charging circuit is matched with the external connection device, and the AC charging interface, the DC charging interface, the AC reverse charging interface or the DC reverse charging circuit in the circuit is matched. When the charging interface and the external connection device are successfully matched, the relay units on the charging circuit where the AC charging interface, DC charging interface, AC reverse charging interface or DC reverse charging interface are located are closed, and the relay units on other charging circuits or return charging circuits are disconnected. .

Further, the AC charging interface, the DC charging interface, the AC reverse charging interface or the DC reverse charging interface are all provided with interface plugs, and the charging interface plugs are used for charging when the AC interface or the DC interface matched with the external connection device is used. Or when supplying power, close the unmatched DC charging interface.

Further, the interface plug and the corresponding charging interface can form a complete electromagnetic shielding layer, and high-voltage interlock with the DC charging gun or the AC charging gun after being plugged into the corresponding DC charging gun or the AC charging gun.

Further, the DC voltage converter includes an IGBT tube group and a transformer booster connected in sequence, and a pair of the IGBT tubes is connected to the output end of the rectifier, wherein the other end of one IGBT tube is connected to the DC positive bus, and the other The other end of one IGBT tube is connected to the DC negative bus.

Further, the inverter includes 3 pairs of MOSFET tubes and a low-pass filter unit, the input end of the low-pass filter unit is connected with a pair of the MOSFET tubes, wherein the source of the other end of one MOSFET tube is connected to the DC positive bus, The drain of the other end of the other MOSFET is connected to the DC negative bus.

The beneficial effects of the present utility model are:

1. The reversible power supply electric vehicle of the present invention is provided with a DC charging interface, an AC charging interface, an AC power supply interface and a DC power supply interface, and uses a relay to control the charging interface and the charging pile to conduct electricity, so that the electric vehicle has fast charging and slow charging. After the charging is completed, when the power grid is powered off, the electric energy of the battery pack in the electric vehicle can be returned to the charging pile or other electric vehicles through the inverter, and integrated into the household power grid to realize energy storage power generation.

2. The reversible power supply electric vehicle of the present utility model is equipped with a high-power inverter, and the function of the inverter is to change the nature of the power supply, so as to turn the electric vehicle into a movable multifunctional mobile power supply device

3. When the reversible power supply electric vehicle of the present utility model is connected to the DC charging gun and inserted into the DC return plug interface of the electric vehicle, the current in the battery pack is returned to the dedicated charging pile through the DC charging gun, and is switched to the dedicated charging pile through the automatic transfer switch. The high-power inverter in the charging pile is converted into AC power output to realize the commercial function of energy storage type grid-connected power generation;

4. When the reversible power supply electric vehicle of the present utility model is connected to the AC charging gun and inserted into the AC return plug interface of the electric vehicle, the current in the battery pack is converted into an AC power supply through the high-power inverter in the electric vehicle and output to the AC power supply of the electric vehicle. The power-return plug-in interface is recharged to the dedicated AC charging pile through the AC charging gun to realize the commercial function of energy storage type grid-connected power generation;

5. The reversible power supply electric vehicle of the present utility model is provided with a voltage-stabilized DC charging module. The function of the voltage-stabilized DC charging module is: after the electric vehicle breaks down due to lack of power, the emergency rescue electric vehicle can quickly charge the rescue electric vehicle through the power-return plug interface. Function, when the DC charging gun is inserted into the electric vehicle return plug interface, the fast DC charging of the broken down electric vehicle is carried out through the regulated DC charging module;

6. The electric vehicle with reversible power supply of the present utility model is provided with a high-power inverter voltage stabilization module, and the function of the high-power inverter voltage stabilization module is: when the electric vehicle is out in the field or has no power supply outside the field, the electric vehicle is equivalent to a A self-provided power generator can convert the electric energy of the battery pack in the electric vehicle into 220V AC, without the need to transport gasoline (diesel) generator equipment. After the electric vehicle consumes a certain amount, it will automatically alarm and stop the power supply, and the owner can drive to the nearby quickly. The charging station charges quickly, and the cycle is used accordingly.

Description of drawings

In order to make the purpose, technical solutions and beneficial effects of the present utility model clearer, the present utility model provides the following accompanying drawings for description:

Fig. 1 is the structural representation of the electric vehicle of the utility model with reversible power supply;

FIG. 2 is a circuit frame diagram of a charging pile for an electric vehicle with a reversible power supply of the present invention;

FIG. 3 is a circuit frame diagram of an electric vehicle with a reversible power supply of the present invention;

FIG. 4 is a circuit diagram of a DC voltage converter in an electric vehicle with a reversible power supply of the present invention;

FIG. 5 is a circuit diagram of a rectifier in an electric vehicle with a reversible power supply of the present invention;

6 is a circuit diagram of an inverter in an electric vehicle with a reversible power supply of the present invention.

Attachment marks: 1-car body; 2-battery pack; 3-rear installation room; 4-DC charging interface; 5-DC reverse charging interface; 6-front installation room; 7-AC charging interface; 8-AC reverse charging Interface; 9-relay unit I; 10-overvoltage and undervoltage protection switch I; 11-relay unit II; 12-DC voltage converter; 13-inverter; 14-relay unit III; 15-transformer booster ; 16- voltage regulator; 17- relay unit; 18- over-voltage and under-voltage protection switch; 19- transformer; 20- rectifier unit; 21- IGBT tube group; 22- transformer booster I.

Detailed ways

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

1-6 are the schematic diagrams of the electric vehicle with a reversible power supply of the present invention; an electric vehicle with a reversible power supply of the present invention comprises a vehicle body 1, a battery pack 2, a controller and a charging circuit. The vehicle body is provided with a DC charging interface 4, a DC reverse charging interface 5, an AC charging interface 7 and an AC reverse charging interface 8, and the charging circuit includes an AC charging circuit that is connected to the positive and negative poles of the battery pack 2 and arranged in parallel, DC charging circuit, AC buckling circuit and DC buckling circuit;

The AC charging circuit includes a rectifier unit 20, a transformer 19, an overvoltage and undervoltage protection switch 18 and a relay unit 17, which are arranged between the AC charging interface 7 and the battery pack 2 and are connected in sequence;

The DC charging circuit includes an overvoltage and undervoltage protection switch I10 and a relay unit I9 which are arranged between the DC charging interface 4 and the battery pack 2 and are connected in sequence;

The DC recharge circuit includes a relay unit III14, a voltage transformer booster 15 and a voltage regulator 16, which are connected in sequence between the battery pack 2 and the DC recharge interface 5;

The AC recharging circuit includes a relay unit II11, a DC voltage converter 12 and an inverter 13 which are arranged between the battery pack 2 and the AC charging interface 8 and are connected in sequence.

In this embodiment, the vehicle body 1 is provided with a DC charging interface 4, a DC reverse charging interface 5, an AC charging interface 7 and an AC reverse charging interface 8 corresponding to the DC charging gun or the AC charging gun, and the charging interface and the charging pile are controlled by a relay. Connected to conduct electricity, so that the electric vehicle can be charged with fast charging and slow charging. After the charging is completed, when the power grid is powered off, the electric energy of the battery pack in the electric vehicle is returned to the charging pile or other electric vehicles through the inverter. Household power grid to realize energy storage power generation.

AC charging status: When AC charging the electric vehicle, connect the AC charging gun with the AC charging interface, so that the AC charging circuit is matched with the external charging pile, the relay unit 17 on the charging circuit where the AC charging interface is located is closed, and the DC charging The relay unit I9, relay unit II11 and relay unit III14 on the circuit, the AC buckling circuit and the DC buckling circuit are disconnected, and the AC power is supplied to the battery pack through the AC charging gun, the rectifier unit 20, the transformer 19 and the overvoltage and undervoltage protection switch 18. Charge;

DC charging status: When charging the electric vehicle with DC, connect the DC charging gun to the DC charging interface, so that the DC charging circuit is matched with the external charging pile, the relay unit I9 on the charging circuit where the DC charging interface is located is closed, and AC charging The relay unit 17, the relay unit II11 and the relay unit III14 on the circuit, the AC recharge circuit and the DC recharge circuit are disconnected, and the direct current charges the battery pack through the DC charging gun and the voltage and undervoltage protection switch I10;

DC recharge state: When the battery pack is recharged, connect the DC charging gun to the DC recharge interface to match the DC recharge circuit with the external charging pile or electric vehicle. The recharge circuit where the DC recharge interface is located The relay unit III14 of the battery pack is closed, the relay unit 17, the relay unit II11 and the relay unit I9 on the AC charging circuit, the AC return charging circuit and the DC charging circuit are disconnected, and the DC power at both ends of the battery pack passes through the relay unit III14, the transformer booster 15 And voltage stabilizer 16, DC charging gun for reverse charging of household circuits, field appliances or other electric vehicles;

AC recharge state: When the battery pack is recharged, connect the AC charging gun to the AC recharge interface, so that the AC recharge circuit is matched with the external charging pile or electric vehicle, and the recharge circuit where the AC recharge interface is located is connected. The relay unit II11 of the battery pack is closed, the relay unit 17, relay unit III14 and relay unit I9 on the AC charging circuit, the current-return charging circuit and the DC charging circuit are disconnected, and the DC power at both ends of the battery pack passes through the relay unit II11, DC voltage converter 12 The inverter 13 and the AC charging gun are used to reverse charge the household circuits, field appliances or other electric vehicles.

In a preferred embodiment, the battery packs 2 are arranged in two rows, the battery packs in the two rows are arranged on the chassis of the vehicle body and are connected in series in sequence, and both ends of the battery packs in the two rows are respectively close to the rear trunk of the vehicle body and the vehicle body Front engine compartment, this structure is convenient for battery pack installation and wiring.

In a preferred embodiment, a rear mounting chamber 3 is provided at the rear of the vehicle body 1 near the trunk, and a front mounting chamber 6 is provided at the front end of the vehicle body 1 near the engine compartment. The relay unit II11 in the AC recharge circuit , DC voltage converter 12 and inverter 13, relay unit III14, transformer booster 15 and voltage regulator 16 in the DC buck circuit are arranged in the front installation room 6, and the rectifier unit in the AC charging circuit 20. The transformer 19, the overvoltage and undervoltage protection switch 18, the relay unit 17, and the overvoltage and undervoltage protection switch I10 and the relay unit I9 in the DC charging circuit are arranged in the rear installation room 3, and this structure is conducive to the arrangement and operation of each circuit. It is easy to install and easy to route cables, while improving the safety of charging and use.

In a preferred embodiment, the DC charging interface 4 is arranged on the side wall of the rear installation room near the driver's seat, and the DC reverse charging interface 5 is arranged on the side wall of the front installation room near the driver's seat. The AC charging interface 8 is arranged on the side wall of the front installation room away from the driver's seat, and the AC charging interface 7 is arranged on the side wall of the rear installation room away from the driver's seat. It is easy to install and easy to route cables, while improving the safety of charging and use.

In a preferred embodiment, the AC charging interface, the DC charging interface, the AC reverse charging interface or the DC reverse charging interface are all provided with interface plugs, and the charging interface plugs are used when the AC interface or the DC interface is matched with the external connection device. When the interface is charging or supplying power, the unmatched DC charging interface is closed, and the structure is beneficial to improve the use safety of the electric vehicle during charging and reverse charging.

In a preferred embodiment, the interface plug and the corresponding charging interface can form a complete electromagnetic shielding layer, and after being plugged into the corresponding DC charging gun or AC charging gun, a high-voltage interconnection between the DC charging gun or the AC charging gun The lock is beneficial to improve the use safety of the electric vehicle during charging and reverse charging.

In a preferred embodiment, the DC voltage converter includes an IGBT tube group and a transformer booster connected in sequence, a pair of the IGBT tubes is connected to the output end of the rectifier, and the other end of one IGBT tube is connected to the DC positive The busbar, the other end of the other IGBT tube is connected to the DC negative busbar. This structure can enable the AC charging to start or end and the voltage shock when the DC charging starts or ends, which is beneficial to improve the safety of the circuit.

Further, the inverter includes 3 pairs of MOSFET tubes and a low-pass filter unit, the input end of the low-pass filter unit is connected with a pair of the MOSFET tubes, wherein the source of the other end of one MOSFET tube is connected to the DC positive bus, The drain of the other end of the other MOSFET is connected to the DC negative bus.

Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should Various changes can be made in the above and in the details without departing from the scope of the present invention as defined by the claims of the present invention.

Claims (9)

1. An electric vehicle with a reversible power supply, comprising a vehicle body, a battery pack, a controller and a charging circuit, characterized in that: the vehicle body is provided with a DC charging interface, a DC reverse charging interface, an AC charging interface and an AC reverse charging interface. a charging interface, wherein the charging circuit includes an AC charging circuit, a DC charging circuit, an AC return charging circuit and a DC return charging circuit that are connected to the positive and negative electrodes of the battery pack and are arranged in parallel; The AC charging circuit includes a rectifier unit, a transformer, an overvoltage and undervoltage protection switch, and a relay unit, which are arranged between the AC charging interface and the battery pack and are connected in sequence; The DC charging circuit includes an overvoltage and undervoltage protection switch 1 and a relay unit 1 which are connected in sequence between the DC charging interface and the battery pack; The DC recharge circuit includes a relay unit III, a voltage transformer booster and a voltage stabilizer arranged between the battery pack and the DC recharge interface and connected in sequence; The AC recharging circuit includes a relay unit II, a DC voltage converter and an inverter which are arranged between the battery pack and the AC charging interface and are connected in sequence. 2 . The electric vehicle with a reversible power supply according to claim 1 , wherein the battery packs are arranged in two rows, and the battery packs in the two rows are arranged on the vehicle body chassis and are connected in series in sequence, and the two rows are arranged in series. 3 . Both ends of the battery pack are respectively close to the rear trunk of the vehicle body and the engine compartment at the front end of the vehicle body. 3. An electric vehicle with a reversible power supply according to claim 1 or 2, characterized in that: a rear installation room is arranged at the rear of the vehicle body near the trunk, and a front end of the vehicle body is arranged near the engine compartment. The front installation room, the relay unit II, the DC voltage converter and the inverter in the AC buckling circuit and the relay unit III, the transformer booster and the voltage stabilizer in the DC buckling circuit are arranged in the front installation room, The rectifier unit, transformer, overvoltage and undervoltage protection switch and relay unit in the AC charging circuit and the overvoltage and undervoltage protection switch I and relay unit I in the DC charging circuit are arranged in the rear installation room. 4 . The electric vehicle with a reversible power supply according to claim 3 , wherein the DC charging interface is arranged on the side wall of the rear installation room close to the driver's seat, and the DC reverse charging interface is arranged on the side wall of the rear installation room. 5 . On the side wall of the front installation room close to the driver's seat, the AC charging interface is arranged on the side wall of the front installation room away from the driver's seat, and the AC charging interface is arranged on the side of the rear installation room away from the driver's seat on the side wall. 5 . The electric vehicle with a reversible power supply according to claim 1 , wherein any one of the AC charging circuit, the DC charging circuit, the AC regenerative charging circuit and the DC regenerative charging circuit is matched with an external connection device. 6 . When the AC charging interface, DC charging interface, AC reverse charging interface or DC reverse charging interface in the circuit is successfully matched with the external connection device, the charging interface where the AC charging interface, DC charging interface, AC reverse charging interface or DC reverse charging interface is located The relay unit on the circuit is closed, and the relay unit on the other charging circuit or the return charging circuit is disconnected. 6 . The electric vehicle with a reversible power supply according to claim 5 , wherein the AC charging interface, the DC charging interface, the AC reverse charging interface or the DC reverse charging interface are all provided with interface plugs, and the said The charging interface plug is used to close the unmatched DC charging interface when charging or supplying power with an AC interface or a DC interface that matches the external connection device. 7. An electric vehicle with a reversible power supply according to claim 6, wherein the interface plug and the corresponding charging interface can form a complete electromagnetic shielding layer, and can be connected to the corresponding DC charging gun or AC After the charging gun is plugged in, the high voltage interlocks between the DC charging gun or the AC charging gun. 8 . An electric vehicle with a reversible power supply according to claim 1 , wherein the DC voltage converter comprises an IGBT tube group and a transformer booster which are connected in sequence, and a pair of all the rectifiers is connected to the output end of the rectifier. 9 . In the IGBT tube described above, the other end of one IGBT tube is connected to the DC positive busbar, and the other end of the other IGBT tube is connected to the DC negative busbar. 9 . An electric vehicle with a reversible power supply according to claim 8 , wherein the inverter comprises 3 pairs of MOSFET transistors and a low-pass filter unit, and an input end of the low-pass filter unit is connected with one pair of all the MOSFETs. 10 . In the MOSFET tube, the source of the other end of one MOSFET tube is connected to the DC positive busbar, and the drain of the other end of the other MOSFET tube is connected to the DC negative busbar.

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