Vehicle-to-vehicle charging device and system and vehicle

Abstract

The utility model belongs to the technical field of vehicle-to-vehicle charging, and particularly provides a vehicle-to-vehicle charging device and system and a vehicle, the device comprises a DC / AC module and an AC / DC module; the input end of the DC / AC module is connected with a first charging gun, the output end of the DC / AC module is connected with the input end of the AC / DC module, and the output end of the AC / DC module is connected with a second charging gun; the device further comprises an auxiliary power supply, and the auxiliary power supply is connected with the first charging gun through a first switch. And the auxiliary power supply is also connected with the second charging gun through the second switch. According to the charging method, the first charging gun is connected to the charging interface of one electric automobile, the second charging gun is connected to the charging interface of another to-be-charged electric automobile, and the first switch and the second switch are switched on to realize automobile-to-automobile charging without depending on a charging pile. In this way, charging convenience is greatly improved, and the method is particularly suitable for the situation that no charging pile exists or the charging pile is not available.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-to-vehicle charging, and in particular to a vehicle-to-vehicle charging device, system and vehicle. Background Art

[0002] With the rapid development of electric vehicle (EV) technology and the increasing global attention to environmentally friendly travel, the popularity of electric vehicles has become an irreversible trend. However, this popularity is accompanied by a series of challenges, the most prominent of which is the charging problem. In particular, in some special environments, such as outdoor outings and remote areas, the charging pile facilities may not be perfect, resulting in the inability to charge electric vehicles in time, thus affecting their normal use.

[0003] The traditional way of charging electric vehicles mainly relies on charging piles, but this method is limited by the number and distribution of charging piles and the compatibility of charging interfaces. Therefore, it is of great significance to study a device that can realize direct charging between electric vehicles when there are no charging piles or charging piles are unavailable. The traditional way of charging electric vehicles mainly relies on charging piles. Although this method solves the charging problem of electric vehicles to a certain extent, it also has many limitations. First, the number and distribution of charging piles are limited by geographical and economic factors and cannot meet the charging needs of all electric vehicles. Secondly, the compatibility of charging piles is also an urgent problem to be solved. Electric vehicles of different brands and models need to use different charging interfaces and charging protocols, which makes the compatibility of charging piles an important technical problem.

[0004] At present, new energy passenger vehicles use low electricity, low voltage (generally less than 450V), and small power. Therefore, the V2V charging equipment commonly used is a small-power bidirectional OBC (charger). Its power supply is generally AC power or DC power below 450V, which cannot be used in new energy commercial vehicles, especially new energy mining machines, loaders and other equipment. Summary of the invention

[0005] The existing V2V technology is mainly used for passenger cars, and generally has the problems of low power and low voltage. It cannot solve the problem of emergency power replenishment for new energy engineering machinery equipment such as mining cars and loaders. The utility model provides a vehicle-to-vehicle charging device, system and vehicle.

[0006] In a first aspect, the technical solution of the utility model provides a vehicle-to-vehicle charging device, including a DC / AC module and an AC / DC module; the input end of the DC / AC module is connected to a first charging gun, the output end of the DC / AC module is connected to the input end of the AC / DC module, and the output end of the AC / DC module is connected to a second charging gun;

[0007] The device also includes an auxiliary power supply, which is connected to the first charging gun through a first switch; the auxiliary power supply is also connected to the second charging gun through a second switch.

[0008] As a preferred embodiment of the technical solution of the utility model, the auxiliary power supply is connected to the AC / DC module.

[0009] As a preferred embodiment of the technical solution of the utility model, the device also includes a controller connected to the first charging gun and the second charging gun respectively.

[0010] After the first charging gun and the second charging gun are respectively connected to the charging socket of the vehicle, the first switch is closed, and a high level is input to the battery management controller of the charging vehicle through the charging socket connected to the first charging gun. The battery management controller of the charging vehicle is connected to the discharge relay of the discharge circuit of the charging vehicle to control the discharge relay to be closed; the second switch is closed, and a high level is input to the battery management controller of the vehicle to be charged through the charging socket connected to the second charging gun. The battery management controller of the vehicle to be charged is connected to the charging relay in the charging circuit of the vehicle to be charged to control the charging relay to be closed.

[0011] As a preferred embodiment of the technical solution of the present utility model, the live wire terminal of the DC / AC module is connected to the live wire terminal of the AC / DC module through a first cable, and the neutral wire terminal of the DC / AC module is connected to the neutral wire terminal of the AC / DC module through a second cable; the ground wire terminal of the DC / AC module is connected to the ground wire terminal of the AC / DC module and then grounded.

[0012] As a preferred embodiment of the technical solution of the utility model, the device also includes a power interface, which is connected to the first cable via a third cable, and the power interface is connected to the second cable via a fourth cable.

[0013] As a preferred embodiment of the technical solution of the utility model, a third switch is provided on the third cable; and the auxiliary power supply is also provided with a charging interface.

[0014] As a preferred embodiment of the technical solution of the utility model, the device further comprises a housing, and the DC / AC module, the AC / DC module, the auxiliary power supply, and the controller are arranged in the housing;

[0015] The charging interface and the power interface are arranged on the housing;

[0016] The first switch, the second switch and the third switch are respectively arranged on the housing.

[0017] In a second aspect, the technical solution of the utility model provides a vehicle-to-vehicle charging system, including a charging vehicle, a vehicle to be charged, and a vehicle-to-vehicle charging device as described in the first aspect;

[0018] Both the charging vehicle and the vehicle to be charged are provided with a power battery system and a charging socket. The power battery system is provided with a battery management controller, a charging circuit with a charging relay, and a discharging circuit with a discharging relay;

[0019] The first charging gun is connected to the charging socket of the charging vehicle, and the second charging gun is connected to the charging socket of the vehicle to be charged;

[0020] After the first switch and the second switch are closed, the controller is respectively connected to the battery management controller of the charging vehicle and the battery management controller of the vehicle to be charged;

[0021] The battery management controller of the charging vehicle controls the discharge relay of the charging vehicle to close, and the battery management controller of the vehicle to be charged controls the charge relay of the vehicle to be charged to close.

[0022] In a third aspect, the technical solution of the utility model provides a vehicle, wherein the vehicle is provided with the vehicle-to-vehicle charging device as described in the first aspect.

[0023] From the above technical solutions, it can be seen that the utility model has the following advantages: the device does not need to rely on charging piles, and only needs to connect the first charging gun to the charging interface of an electric car, and the second charging gun to the charging interface of another electric car to be charged, so as to realize car-to-car charging. This method greatly improves the convenience of charging, and is particularly suitable for situations where there is no charging pile or the charging pile is unavailable.

[0024] Since the device uses a combination of DC / AC modules and AC / DC modules, it can realize charging between electric vehicles with different voltages, currents and interface standards. This design improves the compatibility of charging and avoids charging failures caused by incompatible charging interfaces or mismatched charging voltages.

[0025] The device is equipped with an auxiliary power supply, which can provide stable power support for the AC / DC module. At the same time, through the design of the first switch and the second switch, the power supply of the first charging gun and the second charging gun can be controlled to ensure safety during the charging process.

[0026] In addition, the utility model has a reliable design principle, a simple structure and a very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1It is a schematic block diagram of a device according to an embodiment of the present utility model.

[0029] Figure 2 It is a connection block diagram of a system of an embodiment of the utility model.

[0030] Figure 3 It is a system connection diagram of another embodiment of the utility model.

[0031] In the figure, 1-charging socket connected to the first charging gun, 2-first charging gun, 3-vehicle-to-vehicle charging device, 4-second charging gun, 5-charging socket connected to the second charging gun, 6-power battery system of the first vehicle, 7-battery management controller of the first vehicle, 8-first vehicle, 9-DC / AC module, 10-auxiliary power supply, 11-controller, 12-power interface, 13-charging interface, 14-AC / DC module, 15-second vehicle, 16-power battery system of the second vehicle, 17-battery management controller of the second vehicle, S1-first switch, S2-second switch, S3-third switch. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0033] like Figure 1 As shown, the embodiment of the utility model provides a vehicle-to-vehicle charging device, including a DC / AC module 9 and an AC / DC module 14; the input end of the DC / AC module 9 is connected to the first charging gun 2, the output end of the DC / AC module 9 is connected to the input end of the AC / DC module 14, and the output end of the AC / DC module 14 is connected to the second charging gun 4;

[0034] The device further includes an auxiliary power supply 10 , which is connected to the first charging gun 2 via a first switch S1 , and is also connected to the second charging gun 4 via a second switch S2 .

[0035] Since the vehicle is provided with a battery management controller connected to the charging socket of the vehicle itself, when using the device, the first charging gun and the second charging gun are respectively connected to the charging socket of a vehicle; by closing the first switch and the second switch, the auxiliary power supply outputs a high level and is connected to the battery management controller through the charging socket to activate the battery management controller. After the battery management controller is activated, it controls the corresponding charging circuit and discharging circuit to be connected, and one vehicle starts discharging and the other vehicle starts charging.

[0036] In some embodiments, the auxiliary power supply 10 is connected to an AC / DC module 14, and the AC / DC module 14 is used to charge the auxiliary power supply.

[0037] It should be noted that the device further includes a controller 11 connected to the first charging gun 2 and the second charging gun 4 respectively.

[0038] The auxiliary power supply sends a high-level trigger signal to the battery management controller of the first vehicle through the first switch and the charging socket to which the first charging gun is plugged, and activates the battery management controller of the first vehicle and returns a signal to the controller. When the first vehicle is a charging vehicle, the discharge relay of the discharge circuit of the first vehicle is controlled to close and connect the discharge circuit; the auxiliary power supply sends a high-level trigger signal to the battery management controller of the second vehicle through the second switch and the charging socket to which the second charging gun is plugged, and activates the battery management controller of the second vehicle and returns a signal to the controller. When the second vehicle is a vehicle to be charged, the charging relay of the charging circuit of the second vehicle is controlled to close and connect the charging circuit; a timer is provided in the controller. When the set time is reached, the controller sends a signal to the battery management controller to cause the battery management controller to control the corresponding relay to disconnect.

[0039] It should be further explained that the live wire terminal of the DC / AC module is connected to the live wire terminal of the AC / DC module through a first cable, and the neutral wire terminal of the DC / AC module is connected to the neutral wire terminal of the AC / DC module through a second cable; the ground wire terminal of the DC / AC module is connected to the ground wire terminal of the AC / DC module and then grounded.

[0040] In some embodiments, the device further includes a power interface 12, wherein the power interface 12 is connected to the first cable via a third cable, and the power interface 12 is connected to the second cable via a fourth cable.

[0041] The third cable is provided with a third switch S3 ; the auxiliary power supply 10 is also provided with a charging interface 13 .

[0042] In some embodiments, the device further comprises a housing, wherein the DC / AC module 9, the AC / DC module 14, the auxiliary power supply 10, and the controller 11 are arranged in the housing;

[0043] The charging interface 13 and the power interface 12 are arranged on the housing;

[0044] The first switch, the second switch and the third switch are respectively arranged on the housing.

[0045] The output AC power is not limited to AC220V according to actual conditions, but can also be 380V or higher voltage level. That is, when the device is not performing vehicle-to-vehicle charging, the output AC power can be used for charging and use of the vehicle to be replenished, and can be used as a power source for other loads (LOAD) such as lighting, power tools, etc. by closing the third switch.

[0046] like Figure 2 and Figure 3 As shown, the technical solution of the utility model provides a car-to-car charging system, including a charging vehicle 1, a vehicle to be charged 18 and a car-to-car charging device 3; the car-to-car charging device 3 is the car-to-car charging device described in the above embodiment.

[0047] The charging vehicle 1 and the vehicle to be charged 18 are both provided with a power battery system and a charging socket, and the power battery system is provided with a battery management controller, a charging circuit with a charging relay, and a discharging circuit with a discharging relay;

[0048] The first charging gun 2 is connected to the charging socket of the energy-replenishing vehicle, and the second charging gun 4 is connected to the charging socket of the vehicle to be energy-replenished;

[0049] After the first switch and the second switch are closed, the controller is respectively connected to the battery management controller of the charging vehicle and the battery management controller of the vehicle to be charged;

[0050] The battery management controller of the charging vehicle controls the discharge relay of the charging vehicle to close, and the battery management controller of the vehicle to be charged controls the charge relay of the vehicle to be charged to close.

[0051] The first charging gun 2 is connected to the charging socket of the charging vehicle 8. The charging socket here is used for discharging. The first charging gun 2 and the charging socket both comply with the requirements of GB20234.3; the battery management controller of the charging vehicle and the controller of the charging device realize the handshake between the charging vehicle and the charging system through a proprietary protocol; this part is pre-set, and after the charging gun is connected to the charging socket, the battery management controller completes the handshake communication with the controller at all times after being activated by a high level.

[0052] The second charging gun 4 is connected to the charging socket of the vehicle to be charged 18, and the second charging gun 4 and the connected charging socket both comply with the requirements of GB20234.3; the communication protocol between the battery management controller of the vehicle to be charged and the charging device is implemented in accordance with the relevant requirements of GB27930;

[0053] like Figure 3As shown, the DC / AC module 9 is mainly used to convert the direct current in the charging vehicle into alternating current; after the charging socket of the charging vehicle is physically connected to the first charging gun 2, the battery management controller of the charging vehicle is awakened by closing the first switch S1 of the auxiliary power supply 10 to output a high level, and after the battery management controller and the controller 11 communicate and shake hands, the charging relay of the charging circuit in the power battery system of the charging vehicle is closed, the charging is ready, the DC / AC module 9 is in working state, and can output alternating current at any time; during the vehicle-to-vehicle charging process, the third switch is disconnected, and the power interface 12 is not charged at this time to ensure the safety of the equipment.

[0054] The AC / DC module of the charging system can be configured according to actual needs, and the output voltage has a wide voltage range to meet the high voltage requirements of new energy commercial vehicles, especially new energy mining vehicles and loaders. The charging strategy and communication protocol implement GB27930. After the second charging gun 4 is physically connected to the charging socket, the second switch of the auxiliary power supply 10 is closed, and the controller 11 communicates and shakes hands with the battery management controller of the vehicle to be charged, the charging preparation is completed, and then the charging action is executed;

[0055] The charging device is equipped with an auxiliary power supply, which is a 24V lithium battery or lead-acid battery. It is used to wake up the battery management controller and can also be used for emergency power supply. The 24V output of the AC / DC module can charge the auxiliary power supply.

[0056] Compared with the existing two-way OBC technology for passenger cars, the utility model mainly solves the problem of emergency energy replenishment for commercial vehicles, especially mining machinery, and solves the problem that mining vehicles, loaders, etc. are short of power during use and cannot be moved to charging piles for charging; the charging system has the characteristics of high power and wide voltage, which meets the use requirements of commercial vehicles, especially engineering vehicles; the charging system can be placed on the vehicle or the equipment, or it can be placed separately on the emergency energy replenishment vehicle to meet emergency use;

[0057] The present practical embodiment also provides a vehicle, wherein the vehicle is provided with the vehicle-to-vehicle charging device as described in the above embodiment.

[0058] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field may easily think of changes or substitutions within the technical scope disclosed in the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A vehicle-to-vehicle charging device, characterized in that: It includes a DC / AC module and an AC / DC module; the input end of the DC / AC module is connected to a first charging gun, the output end of the DC / AC module is connected to the input end of the AC / DC module, and the output end of the AC / DC module is connected to a second charging gun; The device also includes an auxiliary power supply, which is connected to the first charging gun through a first switch; the auxiliary power supply is also connected to the second charging gun through a second switch.

2. The vehicle-to-vehicle charging device according to claim 1, characterized in that: The auxiliary power supply is connected to the AC / DC module.

3. The vehicle-to-vehicle charging device according to claim 1 or 2, characterized in that: The device also includes a controller connected to the first charging gun and the second charging gun respectively.

4. The vehicle-to-vehicle charging device according to claim 3, characterized in that: The live wire end of the DC / AC module is connected to the live wire end of the AC / DC module through a first cable, and the neutral wire end of the DC / AC module is connected to the neutral wire end of the AC / DC module through a second cable; the ground wire end of the DC / AC module is connected to the ground wire end of the AC / DC module and then grounded.

5. The vehicle-to-vehicle charging device according to claim 4, characterized in that: The device also includes a power interface, which is connected to the first cable via a third cable, and is connected to the second cable via a fourth cable.

6. The vehicle-to-vehicle charging device according to claim 5, characterized in that: The third cable is provided with a third switch; the auxiliary power supply is also provided with a charging interface.

7. The vehicle-to-vehicle charging device according to claim 6, characterized in that: The device also includes a housing, in which the DC / AC module, the AC / DC module, the auxiliary power supply, and the controller are arranged; The charging interface and the power interface are arranged on the housing; The first switch, the second switch and the third switch are respectively arranged on the housing.

8. A vehicle-to-vehicle charging system, characterized in that: It comprises a charging vehicle, a vehicle to be charged, and a vehicle-to-vehicle charging device as claimed in any one of claims 1 to 7; The charging vehicle and the vehicle to be charged are both provided with a power battery system and a charging socket connected to the power battery system; The first charging gun is connected to the charging socket of the charging vehicle, and the second charging gun is connected to the charging socket of the vehicle to be charged.

9. The vehicle-to-vehicle charging system according to claim 8, characterized in that: The power battery system is provided with a battery management controller, a charging circuit with a charging relay, and a discharging circuit with a discharging relay; After the first switch and the second switch are closed, the controller is respectively connected to the battery management controller of the charging vehicle and the battery management controller of the vehicle to be charged; The battery management controller of the charging vehicle controls the discharge relay of the charging vehicle to close, and the battery management controller of the vehicle to be charged controls the charge relay of the vehicle to be charged to close.

10. A vehicle, characterized in that: The vehicle is provided with a vehicle-to-vehicle charging device as described in any one of claims 1-7.

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