Mobile charging and discharging system and charging vehicle

Abstract

The invention discloses a mobile charging and discharging system and a charging vehicle. Each charging and discharging branch of the charging vehicle comprises a charging gun and a bidirectional DC / DC module. The control module is used for controlling the DC / DC module in the first charging and discharging branch to convert the voltage of the energy storage battery into the charging voltage of the first electric vehicle in a first mode, and charging the first electric vehicle through a charging gun in the first charging and discharging branch; in the second mode, the DC / DC module in the second charging and discharging branch or the third charging and discharging branch is controlled to convert the battery voltage of the second electric automobile into the charging voltage of the third electric automobile, and the third electric automobile is charged through the charging gun in the third charging and discharging branch; and in the third mode, the DC / DC module in the fourth charging and discharging branch is controlled to convert the battery voltage of the fourth electric vehicle into the charging voltage of the energy storage battery, and the energy storage battery is charged. By implementing the technical scheme provided by the invention, the requirements of users in different use scenes can be met.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicle charging, and particularly to a mobile charging and discharging system and a charging vehicle. Background Art

[0002] With the popularization of new energy vehicles, the charging problem of electric vehicles has gradually become one of the key factors restricting their development. Traditional charging methods often require a long time and rely on fixed charging facilities, which to a certain extent limits the use convenience of electric vehicles. To solve this problem, mobile charging vehicles have emerged. They can provide fast charging services when users need them, are not restricted by location, and greatly improve the use efficiency of electric vehicles.

[0003] However, conventional charging vehicles have a single function. The energy can only flow unidirectionally from the energy storage battery of the charging vehicle to the battery of the electric vehicle, and the endurance of the charging vehicle is affected by the capacity of the energy storage battery of the charging vehicle. When the energy storage battery of the charging vehicle has no power, it cannot be used, so the usage scenarios are limited. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a mobile charging and discharging system and a charging vehicle for the technical problems of single function and limited application of existing charging vehicles.

[0005] The technical solution adopted by the present invention to solve its technical problems is: to construct a charging vehicle, including an energy storage battery, and further including:

[0006] At least two charging and discharging branches, and each charging and discharging branch includes a charging gun and a bidirectional DC / DC module;

[0007] A control module for obtaining the working mode selected by the user, wherein the working mode includes a first mode, and a second mode and / or a third mode, and

[0008] In the first mode, control the DC / DC module in the first charging and discharging branch to convert the voltage of the energy storage battery into the charging voltage of the first electric vehicle, and charge the first electric vehicle through the charging gun in the first charging and discharging branch, wherein the first charging and discharging branch is the charging and discharging branch where the charging gun connected to the first electric vehicle being currently charged is located;

[0009] In the second mode, the DC / DC module in the second charge-discharge branch or the third charge-discharge branch is controlled to convert the battery voltage of the second electric vehicle into the charging voltage of the third electric vehicle, and the third electric vehicle is charged through the charging gun in the third charge-discharge branch, where the second charge-discharge branch is the charge-discharge branch where the charging gun connected to the currently discharging second electric vehicle is located, and the third charge-discharge branch is the charge-discharge branch where the charging gun connected to the currently charging third electric vehicle is located;

[0010] In the third mode, the DC / DC module in the fourth charge-discharge branch is controlled to convert the battery voltage of the fourth electric vehicle into the charging voltage of the energy storage battery and charge the energy storage battery, where the fourth charge-discharge branch is the charge-discharge branch where the charging gun connected to the currently discharging fourth electric vehicle is located.

[0011] Optionally, it further includes:

[0012] A grid interface for accessing the grid voltage;

[0013] A bidirectional AC / DC module connected between the grid interface and the energy storage battery;

[0014] Moreover, the working mode further includes a fourth mode and / or a fifth mode;

[0015] The control module is further configured to, in the fourth mode, control the AC / DC module to convert the grid voltage into the charging voltage of the fifth electric vehicle and charge the fifth electric vehicle through the charging gun in the fifth charge-discharge branch, where the fifth charge-discharge branch is the charge-discharge branch where the charging gun connected to the currently charging fifth electric vehicle is located; and / or,

[0016] In the fifth mode, the battery voltage of the sixth electric vehicle is accessed through the charging gun in the sixth charge-discharge branch, and the control module controls the AC / DC module to convert it into the grid voltage and discharge it through the grid interface, where the sixth charge-discharge branch is the charge-discharge branch where the charging gun connected to the currently discharging sixth electric vehicle is located.

[0017] Optionally, the control module is further configured to, in the fourth mode, if charging the fifth electric vehicle and the seventh electric vehicle simultaneously, control the AC / DC module to convert the grid voltage into the charging voltage of the fifth electric vehicle, and charge the fifth electric vehicle through the charging gun in the fifth charging and discharging branch, and control the DC / DC module in the fifth charging and discharging branch or the seventh charging and discharging branch to convert the charging voltage of the fifth electric vehicle into the charging voltage of the seventh electric vehicle, and charge the seventh electric vehicle through the charging gun in the seventh charging and discharging branch, where the seventh charging and discharging branch is the charging and discharging branch where the charging gun connected to the currently charged seventh electric vehicle is located.

[0018] Optionally, the control module is further configured to, in the fifth mode, if the sixth electric vehicle and the eighth electric vehicle discharge to the grid simultaneously, access the battery voltage of the sixth electric vehicle through the charging gun in the sixth charging and discharging branch, and access the battery voltage of the eighth electric vehicle through the eighth charging and discharging branch, and control the DC / DC module in the sixth charging and discharging branch to convert the battery voltage of the sixth electric vehicle into the battery voltage of the eighth electric vehicle, and then control the AC / DC module to convert the battery voltage of the eighth electric vehicle into the grid voltage, and discharge through the grid interface.

[0019] Optionally, the control module includes a charge and discharge controller and a switch module, and the switch module includes:

[0020] A first switch and a second switch respectively arranged in each charging and discharging branch, where the first switch is connected between the energy storage battery and the first end of the DC / DC module in the corresponding charging and discharging branch; the second switch is connected between the second end of the DC / DC module in the corresponding charging and discharging branch and the charging gun;

[0021] A third switch arranged between different charging and discharging branches, and the third switch is connected between the first end of the DC / DC module in one charging and discharging branch and the charging gun in another charging and discharging branch;

[0022] Moreover, the charge and discharge controller is configured to control the first switch and the second switch in the first charging and discharging branch to close in the first mode; control the second switch in the second charging and discharging branch to close and control the third switch between the second charging and discharging branch and the third charging and discharging branch to close in the second mode; control the first switch and the second switch in the fourth charging and discharging branch to close in the third mode.

[0023] Optionally, the switch module further includes:

[0024] A fourth switch connected between the second end of the AC / DC module and the first end of the energy storage battery, wherein the first end of the AC / DC module is connected to the grid interface;

[0025] A fifth switch connected between the second end of the AC / DC module and the second end of the energy storage battery;

[0026] A sixth switch provided in at least one charge and discharge branch, wherein the sixth switch is connected between the first end and the second end of the DC / DC module in the corresponding charge and discharge branch;

[0027] The charge and discharge controller is further configured to, in the fourth mode, control the fifth switch to close, and control the first switch, the second switch, and the sixth switch in the fifth charge and discharge branch to close; in the fifth mode, control the first switch, the second switch, and the sixth switch in the sixth charge and discharge branch to close, and control the fifth switch to close.

[0028] Optionally, the charge and discharge controller is further configured to, in the fourth mode, if charging the fifth electric vehicle and the seventh electric vehicle simultaneously, control the fifth switch to close, and control the first switch and the second switch in the fifth charge and discharge branch to close, and control the third switch in the fifth charge and discharge branch and the seventh charge and discharge branch to close.

[0029] Optionally, the charge and discharge controller is further configured to, in the fifth mode, if the sixth electric vehicle and the eighth electric vehicle discharge to the grid simultaneously, control the fifth switch to close, and control the first switch and the second switch in the sixth charge and discharge branch to close, and control the third switch in the sixth charge and discharge branch and the eighth charge and discharge branch to close.

[0030] Optionally, it further includes:

[0031] An autonomous driving module, configured to, after obtaining the target position of the target electric vehicle to be charged / discharged, autonomously drive from the current starting position to the target position for the target electric vehicle to charge / discharge, and after the charge / discharge is completed, autonomously drive back to the starting position.

[0032] The present invention also constructs a mobile charge and discharge system, including:

[0033] The above-mentioned charging vehicle;

[0034] A user terminal;

[0035] A cloud platform, configured to realize electric vehicle charge and discharge management by interacting with the user terminal and the charging vehicle respectively.

[0036] Through the technical solution of the present invention, the working mode of the charging vehicle not only includes the first mode, but also includes the second mode and / or the third mode. Moreover, for the flow of electric energy, it can not only flow from the energy storage battery of the charging vehicle to the electric vehicle in the first mode, but also flow from one electric vehicle to another electric vehicle in the second mode; and / or, in the third mode, it can flow from the electric vehicle to the energy storage battery of the charging vehicle. In this way, even when the power of the energy storage battery of the charging vehicle is low, the charging vehicle does not need to return to the starting position for charging, but can continue to be used in the second mode or the third mode. Therefore, it can meet the needs of different usage scenarios of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. In the drawings:

[0038] Figure 1 is the logical structure diagram of the first embodiment of the charging vehicle of the present invention;

[0039] Figure 2 is the logical structure diagram of the second embodiment of the charging vehicle of the present invention;

[0040] Figure 3 is the logical structure diagram of the third embodiment of the charging vehicle of the present invention;

[0041] Figure 4 is the logical structure diagram of the first embodiment of the mobile charging and discharging system of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0043] Figure 1 is the logical structure diagram of the first embodiment of the charging vehicle of the present invention. The charging vehicle in this embodiment includes: an energy storage battery 10, a control module 40, and at least two charging and discharging branches 1,..., 2. Each charging and discharging branch includes a charging gun and a bidirectional DC / DC module. For example, the charging and discharging branch 1 includes a DC / DC module 21 and a charging gun 31; the charging and discharging branch 2 includes a DC / DC module 22 and a charging gun 32.

[0044] The control module 40 is used to obtain the working mode selected by the user. Among them, the working modes include a first mode, and a second mode and / or a third mode. Moreover, in the first mode, it controls the DC / DC module in the first charge-discharge branch to convert the voltage of the energy storage battery 10 into the charging voltage of the first electric vehicle, and charges the first electric vehicle through the charging gun in the first charge-discharge branch. Herein, the first charge-discharge branch is the charge-discharge branch where the charging gun connected to the currently charging first electric vehicle is located; in the second mode, it controls the DC / DC module in the second charge-discharge branch or the third charge-discharge branch to convert the battery voltage of the second electric vehicle into the charging voltage of the third electric vehicle, and charges the third electric vehicle through the charging gun in the third charge-discharge branch. Herein, the second charge-discharge branch is the charge-discharge branch where the charging gun connected to the currently discharging second electric vehicle is located, and the third charge-discharge branch is the charge-discharge branch where the charging gun connected to the currently charging third electric vehicle is located; in the third mode, it controls the DC / DC module in the fourth charge-discharge branch to convert the battery voltage of the fourth electric vehicle into the charging voltage of the energy storage battery, and charges the energy storage battery. Herein, the fourth charge-discharge branch is the charge-discharge branch where the charging gun connected to the currently discharging fourth electric vehicle is located.

[0045] The following combines specific application scenarios to illustrate the working process of the charging vehicle in different modes:

[0046] In some cases, if a certain electric vehicle (the first electric vehicle) needs to be charged and the power of the energy storage battery 10 of the charging vehicle is large enough (greater than the set value), the user can select the first mode and insert one of the charging guns (taking the charging gun 31 as an example) into this electric vehicle. At this time, the charge-discharge branch 1 where the charging gun 31 is located is the first charge-discharge branch, and the control module 40 can control the DC / DC module 21 in the charge-discharge branch 1 to convert the voltage of the energy storage battery 10 into the charging voltage of this electric vehicle, and charge this electric vehicle through the charging gun 31. Of course, if the user inserts the charging gun 32 into this electric vehicle, the charge-discharge branch 2 where the charging gun 32 is located is the first charge-discharge branch. At this time, the control module 40 controls the DC / DC module 22 (in the same charge-discharge branch as the charging gun 32) to convert the voltage of the energy storage battery 10 into the charging voltage of this electric vehicle, and charge this electric vehicle through the charging gun 32.

[0047] In some cases, if an electric vehicle (the third electric vehicle) needs to be charged, but the power of the energy storage battery 10 of the charging vehicle is insufficient (less than the set value) and it cannot charge the electric vehicle in the first mode, and there are other electric vehicles (the second electric vehicle) nearby with sufficient battery power and capable of providing energy, the user can select the second mode, insert the charging gun 31 into the second electric vehicle to be discharged, and insert the charging gun 32 into the third electric vehicle to be charged. At this time, the charge and discharge branch 1 where the charging gun 31 is located is the second charge and discharge branch, the charge and discharge branch 2 where the charging gun 32 is located is the third charge and discharge branch, and the control module 40 controls the DC / DC module 21 (in the same charge and discharge branch as the charging gun 31) in the second charge and discharge branch to convert the battery voltage of the second electric vehicle into the charging voltage of the third electric vehicle, and charge the third electric vehicle through the charging gun 32. Or, the control module 40 controls the DC / DC module 22 (in the same charge and discharge branch as the charging gun 32) in the third charge and discharge branch to convert the battery voltage of the second electric vehicle into the charging voltage of the third electric vehicle, and charge the third electric vehicle through the charging gun 32. In this mode, one charging gun works in the discharge state and the other works in the charging state, and the charge and discharge between two electric vehicles is realized through the bidirectional DC / DC module.

[0048] In some cases, if an electric vehicle (the fourth electric vehicle) needs to discharge, it can issue a discharge demand, and the nearby charging vehicle with insufficient power will give priority to responding to its demand. At this time, the user can select the third mode and insert one of the charging guns (taking the charging gun 31 as an example) into this electric vehicle. At this time, the charge and discharge branch 1 where the charging gun 31 is located is the fourth charge and discharge branch, and the control module 40 controls the DC / DC module 21 (in the same charge and discharge branch as the charging gun 31) in the fourth charge and discharge branch to convert the battery voltage of this electric vehicle into the charging voltage of the energy storage battery 10 and charge the energy storage battery. In this mode, even if the charging vehicle has little power, it does not have to immediately return to the starting station for charging, but can use other electric vehicles (the fourth electric vehicle) to charge on the way, and continue to meet the user's needs after the charging is completed.

[0049] In the technical solution of this embodiment, the working modes of the charging vehicle not only include the first mode, but also include the second mode and / or the third mode. Moreover, for the flow of electric energy, not only can it flow from the energy storage battery of the charging vehicle to the electric vehicle in the first mode, but also it can flow from one electric vehicle to another electric vehicle in the second mode; and / or, in the third mode, it can flow from the electric vehicle to the energy storage battery of the charging vehicle. In this way, even when the power of the energy storage battery of the charging vehicle is insufficient, the charging vehicle still does not need to return to the starting position for charging, but can continue to be used in the second mode or the third mode. Therefore, it can meet the needs of different usage scenarios of users.

[0050] Figure 2 It is the logic structure diagram of the second embodiment of the charging vehicle of the present invention. Compared with the charging vehicle of the embodiment Figure 1 shown, it further includes a power grid interface 50 and an AC / DC module 60. Among them, the power grid interface 50 is used to access the power grid voltage; the AC / DC module 60 is a bidirectional AC / DC module and is connected between the power grid interface 50 and the energy storage battery 10. The working mode of the charging vehicle further includes a fourth mode and / or a fifth mode.

[0051] The control module 40 is further configured to, in the fourth mode, control the AC / DC module 60 to convert the power grid voltage into the charging voltage of the fifth electric vehicle, and charge the fifth electric vehicle through the charging gun in the fifth charge and discharge branch, where the fifth charge and discharge branch is the charge and discharge branch where the charging gun connected to the currently charged fifth electric vehicle is located; and / or, in the fifth mode, access the battery voltage of the sixth electric vehicle through the charging gun in the sixth charge and discharge branch, control the AC / DC module 60 to convert it into the power grid voltage, and discharge it through the power grid interface, where the sixth charge and discharge branch is the charge and discharge branch where the charging gun connected to the currently discharging sixth electric vehicle is located.

[0052] Further, the control module 40 is further configured to, in the fourth mode, if charging the fifth electric vehicle and the seventh electric vehicle simultaneously, control the AC / DC module to convert the power grid voltage into the charging voltage of the fifth electric vehicle, and charge the fifth electric vehicle through the charging gun in the fifth charge and discharge branch, and control the DC / DC module in the fifth charge and discharge branch or the seventh charge and discharge branch to convert the charging voltage of the fifth electric vehicle into the charging voltage of the seventh electric vehicle, and charge the seventh electric vehicle through the charging gun in the seventh charge and discharge branch, where the seventh charge and discharge branch is the charge and discharge branch where the charging gun connected to the currently charged seventh electric vehicle is located.

[0053] Further, the control module is further configured to, in the fifth mode, if the sixth electric vehicle and the eighth electric vehicle discharge to the power grid simultaneously, access the battery voltage of the sixth electric vehicle through the charging gun in the sixth charge and discharge branch, and access the battery voltage of the eighth electric vehicle through the eighth charge and discharge branch, control the DC / DC module in the sixth charge and discharge branch to convert the battery voltage of the sixth electric vehicle into the battery voltage of the eighth electric vehicle, then control the AC / DC module to convert the battery voltage of the eighth electric vehicle into the power grid voltage, and discharge it through the power grid interface.

[0054] The following combines specific application scenarios to illustrate the working process of the charging vehicle in different modes:

[0055] In some cases, if an electric vehicle (the fifth electric vehicle) needs to be charged and the user can directly connect to the power grid, the user can select the fourth mode and insert one of the charging guns (taking charging gun 31 as an example) into the electric vehicle. At this time, the charge-discharge branch 1 where the charging gun 31 is located is the fifth charge-discharge branch, and the control module 40 controls the AC / DC module 60 to convert the grid voltage into the charging voltage of the electric vehicle, and charges the electric vehicle through the charging gun 31. In this way, in the fourth mode, the grid voltage is directly supplied to the corresponding charging gun after being converted by the AC / DC module 60, without passing through the energy storage battery 10 and the DC / DC module 21, improving the energy conversion efficiency.

[0056] In some cases, if multiple electric vehicles (taking the fifth electric vehicle and the seventh electric vehicle as examples) need to be charged simultaneously, the user can select the fourth mode, insert the charging gun 31 into the fifth electric vehicle, and insert the charging gun 32 into the seventh electric vehicle. At this time, the control module 40 controls the AC / DC module 60 to convert the grid voltage into the charging voltage of the fifth electric vehicle, and charges the fifth electric vehicle through the charging gun 31. It also controls the DC / DC module 21 to convert the charging voltage of the fifth electric vehicle into the charging voltage of the seventh electric vehicle, and charges the seventh electric vehicle through the charging gun 32. In this way, in the fourth mode, multiple electric vehicles can be charged simultaneously.

[0057] In some cases, if an electric vehicle (the sixth electric vehicle) needs to discharge and the user can directly connect to the power grid, the user can select the fifth mode and insert one of the charging guns (taking charging gun 31 as an example) into the electric vehicle. At this time, the charging gun 31 can connect the battery voltage of the electric vehicle to the AC / DC module 60, and the control module 40 then controls the AC / DC module 60 to convert it into the grid voltage and discharge it through the grid interface 50.

[0058] In some cases, if multiple electric vehicles (taking the sixth electric vehicle and the eighth electric vehicle as examples) discharge to the power grid simultaneously, the user can select the fifth mode, insert the charging gun 31 into the sixth electric vehicle, and insert the charging gun 32 into the eighth electric vehicle. At this time, the control module 40 controls the DC / DC module 21 to convert the battery voltage of the sixth electric vehicle into the battery voltage of the eighth electric vehicle, then controls the AC / DC module 60 to convert the battery voltage of the eighth electric vehicle into the grid voltage, and discharges it through the grid interface 50.

[0059] Further, in an optional embodiment, the control module includes a charge-discharge controller and a switch module, and the switch module includes:

[0060] The first switch and the second switch are respectively arranged in each charge-discharge branch. Among them, the first switch is connected between the energy storage battery and the first end of the DC / DC module in the corresponding charge-discharge branch; the second switch is connected between the second end of the DC / DC module in the corresponding charge-discharge branch and the charging gun;

[0061] The third switch is arranged between different charge-discharge branches, and the third switch is connected between the first end of the DC / DC module in one charge-discharge branch and the charging gun in another charge-discharge branch;

[0062] The fourth switch is connected between the second end of the AC / DC module and the first end of the energy storage battery. Among them, the first end of the AC / DC module is connected to the grid interface;

[0063] The fifth switch is connected between the second end of the AC / DC module and the second end of the energy storage battery;

[0064] The sixth switch is arranged in at least one charge-discharge branch. Among them, the sixth switch is connected between the first end and the second end of the DC / DC module in the corresponding charge-discharge branch.

[0065] Moreover, the charge-discharge controller is used to control the first switch and the second switch in the first charge-discharge branch to close in the first mode; control the second switch in the second charge-discharge branch to close and control the third switch between the second charge-discharge branch and the third charge-discharge branch to close in the second mode; control the first switch and the second switch in the fourth charge-discharge branch to close in the third mode; control the fifth switch to close and control the first switch, the second switch, and the sixth switch in the fifth charge-discharge branch to close in the fourth mode; control the first switch, the second switch, and the sixth switch in the sixth charge-discharge branch to close and control the fifth switch to close in the fifth mode.

[0066] Further, the charge-discharge controller is further used to, in the fourth mode, if charging the fifth electric vehicle and the seventh electric vehicle simultaneously, control the fifth switch to close, and control the first switch and the second switch in the fifth charge-discharge branch to close, and control the third switch between the fifth charge-discharge branch and the seventh charge-discharge branch to close.

[0067] Further, the charge-discharge controller is further used to, in the fifth mode, if the sixth electric vehicle and the eighth electric vehicle discharge to the grid simultaneously, control the fifth switch to close, and control the first switch and the second switch in the sixth charge-discharge branch to close, and control the third switch between the sixth charge-discharge branch and the eighth charge-discharge branch to close.

[0068] Figure 3It is the logic structure diagram of the third embodiment of the charging vehicle of the present invention. The charging vehicle of this embodiment includes: an energy storage battery 10, a control module, a grid interface 50, an AC / DC module 60, and two charge and discharge branches. One of the charge and discharge branches includes a DC / DC module 21 and a charging gun 31, and the other charge and discharge branch includes a DC / DC module 22 and a charging gun 32. Moreover, the DC / DC modules 21 and 22 are respectively bidirectional DC / DC modules.

[0069] As Figure 3 shown, the control module includes a charge and discharge controller 41 and a switch module. The switch module includes: two first switches K11, K12, two second switches K21, K22, a third switch K3, a fourth switch K4, a fifth switch K5, and a sixth switch K6. Among them, the first switch K11 and the second switch K21 are arranged in one of the charge and discharge branches, the first switch K12 and the second switch K22 are arranged in the other charge and discharge branch, and the first switch K11 is connected between the energy storage battery 10 and the first end of the DC / DC module 21; the second switch K21 is connected between the second end of the DC / DC module 21 and the charging gun 31; the first switch K12 is connected between the energy storage battery 10 and the first end of the DC / DC module 22; the second switch K22 is connected between the second end of the DC / DC module 22 and the charging gun 32. The third switch K3 is connected between the first end of the DC / DC module 21 and the charging gun 32 in the second charge and discharge branch. The fourth switch K4 is connected between the second end of the AC / DC module 60 and the first end of the energy storage battery 10. The fifth switch K5 is connected between the second end of the AC / DC module 60 and the second end of the energy storage battery 10. The sixth switch K6 is connected between the first end and the second end of the DC / DC module 21.

[0070] The following combines specific application scenarios to illustrate the control process of the charge and discharge controller of the charging vehicle in different modes:

[0071] In the first mode, the energy storage battery 10 can charge an electric vehicle. Specifically, the charge and discharge controller 41 controls the first switch K11 and the second switch K21 to close, so that the electric energy of the energy storage battery 10 is converted by the DC / DC module 21 and then delivered to the electric vehicle connected to the charging gun 31. In some cases, the charge and discharge controller 41 can also control the first switch K12 and the second switch K22 to close, so that the electric energy of the energy storage battery 10 is converted by the DC / DC module 22 and then delivered to the electric vehicle connected to the charging gun 32.

[0072] In the second mode, an electric vehicle can charge another electric vehicle. Specifically, connect the electric vehicle to be discharged to the charging gun 31, and connect the electric vehicle to be charged to the charging gun 32. The charge-discharge controller 41 controls the second switch K21 and the third switch K3 to close, so that the electric energy of the electric vehicle connected to the charging gun 31 is converted by the DC / DC module 21 and then transmitted to the electric vehicle connected to the charging gun 32.

[0073] In the third mode, the electric vehicle can discharge to the energy storage battery 10. Specifically, the charge-discharge controller 41 controls the first switch K11 and the second switch K21 to close, so that the electric energy of the electric vehicle connected to the charging gun 31 is converted by the DC / DC module 21 and then transmitted to the energy storage battery 10. In some cases, the charge-discharge controller 41 can also control the first switch K12 and the second switch K22 to close, so that the electric energy of the electric vehicle connected to the charging gun 32 is converted by the DC / DC module 22 and then transmitted to the energy storage battery 10.

[0074] In the fourth mode, the grid voltage is used to charge the electric vehicle. Specifically, when charging the electric vehicle connected to the charging gun 31 alone, the charge-discharge controller 41 controls the fifth switch K5, the first switch K11, the second switch K21, and the sixth switch K6 to close, so that the electric energy of the grid is converted by the AC / DC module 60 and then bypasses the energy storage battery 10 and the DC / DC module 21 and is directly transmitted to the electric vehicle connected to the charging gun 31, improving the energy conversion efficiency. When charging the electric vehicles connected to the charging guns 31 and 32 respectively at the same time, the charge-discharge controller 41 controls the fifth switch K5, the first switch K11, the second switch K21, and the third switch K3 to close, so that after the electric energy of the grid is converted by the AC / DC module 60, one path charges an electric vehicle through the charging gun 31, and the other path is converted by the DC / DC module 21 and then charges another electric vehicle through the charging gun 32.

[0075] In the fifth mode, the electric vehicle can discharge to the grid. Specifically, when the electric vehicle connected to the charging gun 31 discharges alone, the charge-discharge controller 41 controls the first switch K11, the second switch K21, the sixth switch K6, and the fifth switch K5 to close, so that the electric energy of the electric vehicle connected to the charging gun 31 is directly converted by the AC / DC module 60 and then transmitted to the grid. When the electric vehicles connected to the charging guns 31 and 32 discharge at the same time, the charge-discharge controller 41 controls the first switch K11, the second switch K2, the fifth switch K5, and the third switch K3 to close, so that the electric energy of the electric vehicle connected to the charging gun 31 is first converted by the DC / DC module 21, and then together with the electric energy of the electric vehicle connected to the charging gun 31 is sent to the AC / DC module 60 for conversion, and finally transmitted to the grid.

[0076] Regarding the above embodiments, it should be noted that in each working mode, although only the switches that need to be closed are described, for the switches not mentioned, their off states should be maintained. Additionally, for the above switches, preferably double-line switches, such as 2P circuit breakers, are used, which can achieve synchronous on / off of the two lines and improve reliability.

[0077] Furthermore, as Figure 3 shown, the charging vehicle further includes an autonomous driving module 70, a display module 80, and a power module 90. Among them, the autonomous driving module 70 is used to autonomously drive from the current starting position to the target position after obtaining the target position of the target electric vehicle to be charged / discharged, so that the target electric vehicle can be charged / discharged, and after the charging / discharging is completed, it autonomously drives back to the starting position. The power module 90 is used to draw power from the energy storage battery 10 and provide power support for the autonomous driving module 70. The display module 80 is used to output prompt information, transaction information, etc.

[0078] In addition, the autonomous driving module 70 further includes an autonomous driving sensor and an autonomous driving controller. Among them, the autonomous driving sensor is used to sense the vehicle's own state and the surrounding environment; the autonomous driving controller is used to process the sensing information of the autonomous driving sensor, make decisions on vehicle behavior (such as following a vehicle, changing lanes left / right, overtaking, waiting for a red light, avoiding obstacles, etc.), and control the vehicle to execute actions (such as steering, throttle, braking, etc.).

[0079] Figure 4 is the logical structure diagram of the first embodiment of the mobile charging and discharging system of the present invention. The mobile charging and discharging system of this embodiment includes a charging vehicle 100, a cloud platform 200, and a user terminal 300. It should be understood that in actual applications, the number of charging vehicles 100 and user terminals 300 can be multiple respectively. Additionally, the logical structure of the charging vehicle 100 can refer to the previous text and will not be elaborated here; the cloud platform 200 is used to achieve electric vehicle charging and discharging management by interacting with the user terminal 300 and the charging vehicle 100 respectively. For example, the user can remotely send the charging / discharging demand information of the electric vehicle to the cloud platform 200 through their user terminal 300 (such as a mobile phone). After the cloud platform 200 obtains the position of the user's electric vehicle according to the demand information, it allocates the corresponding charging vehicle 100 for it. After receiving the allocation information from the cloud platform, the charging vehicle 200 autonomously drives to the destination. After the user determines that they have arrived at the destination through their user terminal 300, the charging vehicle 100 can remind the user to select the corresponding working mode through its display module and charge / discharge the electric vehicle. After the charging / discharging is completed, the charging vehicle 100 returns the transaction fee information to the cloud platform 200. After the user completes the transaction, the charging vehicle 100 automatically returns to the starting point to replenish the power and waits for the next user demand.

[0080] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A charging vehicle, comprising a storage battery, characterized in that, It further includes: At least two charge and discharge branches, and each charge and discharge branch includes a charging gun and a bidirectional DC / DC module; A control module for obtaining the working mode selected by the user, wherein the working mode includes a first mode, and a second mode and / or a third mode, and In the first mode, control the DC / DC module in the first charge and discharge branch to convert the voltage of the energy storage battery into the charging voltage of the first electric vehicle, and charge the first electric vehicle through the charging gun in the first charge and discharge branch, wherein the first charge and discharge branch is the charge and discharge branch where the charging gun connected to the currently charging first electric vehicle is located; In the second mode, control the DC / DC module in the second charge and discharge branch or the third charge and discharge branch to convert the battery voltage of the second electric vehicle into the charging voltage of the third electric vehicle, and charge the third electric vehicle through the charging gun in the third charge and discharge branch, wherein the second charge and discharge branch is the charge and discharge branch where the charging gun connected to the currently discharging second electric vehicle is located, and the third charge and discharge branch is the charge and discharge branch where the charging gun connected to the currently charging third electric vehicle is located; In the third mode, control the DC / DC module in the fourth charge and discharge branch to convert the battery voltage of the fourth electric vehicle into the charging voltage of the energy storage battery, and charge the energy storage battery, wherein the fourth charge and discharge branch is the charge and discharge branch where the charging gun connected to the currently discharging fourth electric vehicle is located.

2. The charging vehicle according to claim 1, wherein It further includes: A grid interface for accessing the grid voltage; A bidirectional AC / DC module connected between the grid interface and the energy storage battery; Moreover, the working mode further includes a fourth mode and / or a fifth mode; The control module is further configured to, in the fourth mode, control the AC / DC module to convert the grid voltage into the charging voltage of the fifth electric vehicle, and charge the fifth electric vehicle through the charging gun in the fifth charge and discharge branch, wherein the fifth charge and discharge branch is the charge and discharge branch where the charging gun connected to the currently charging fifth electric vehicle is located; and / or, In the fifth mode, access the battery voltage of the sixth electric vehicle through the charging gun in the sixth charge and discharge branch, control the AC / DC module to convert it into the grid voltage, and discharge it through the grid interface, wherein the sixth charge and discharge branch is the charge and discharge branch where the charging gun connected to the currently discharging sixth electric vehicle is located.

3. The charging vehicle according to claim 2, wherein The control module is further configured to, in the fourth mode, if charging the fifth electric vehicle and the seventh electric vehicle simultaneously, control the AC / DC module to convert the grid voltage into the charging voltage of the fifth electric vehicle, and charge the fifth electric vehicle through the charging gun in the fifth charging and discharging branch. The control module is also configured to control the DC / DC module in the fifth charging and discharging branch or the seventh charging and discharging branch to convert the charging voltage of the fifth electric vehicle into the charging voltage of the seventh electric vehicle, and charge the seventh electric vehicle through the charging gun in the seventh charging and discharging branch. Herein, the seventh charging and discharging branch is the charging and discharging branch where the charging gun connected to the currently charged seventh electric vehicle is located.

4. The charging vehicle according to claim 3, wherein the control module is further configured to, in the fifth mode, if the sixth electric vehicle and the eighth electric vehicle discharge to the grid simultaneously, access the battery voltage of the sixth electric vehicle through the charging gun in the sixth charging and discharging branch, and access the battery voltage of the eighth electric vehicle through the eighth charging and discharging branch. The control module is also configured to control the DC / DC module in the sixth charging and discharging branch to convert the battery voltage of the sixth electric vehicle into the battery voltage of the eighth electric vehicle, then control the AC / DC module to convert the battery voltage of the eighth electric vehicle into the grid voltage, and perform discharging through the grid interface.

5. The charging vehicle according to claim 4, wherein The control module includes a charging and discharging controller and a switch module, and the switch module includes: a first switch and a second switch respectively disposed in each charging and discharging branch. The first switch is connected between the energy storage battery and the first end of the DC / DC module in the corresponding charging and discharging branch; the second switch is connected between the second end of the DC / DC module in the corresponding charging and discharging branch and the charging gun. a third switch disposed between different charging and discharging branches, and the third switch is connected between the first end of the DC / DC module in one charging and discharging branch and the charging gun in another charging and discharging branch. Moreover, the charging and discharging controller is configured to control the first switch and the second switch in the first charging and discharging branch to close in the first mode; control the second switch in the second charging and discharging branch to close and control the third switch between the second charging and discharging branch and the third charging and discharging branch to close in the second mode; control the first switch and the second switch in the fourth charging and discharging branch to close in the third mode.

6. The charging vehicle according to claim 5, characterized in that, The switch module further includes: a fourth switch connected between the second end of the AC / DC module and the first end of the energy storage battery, wherein the first end of the AC / DC module is connected to the grid interface. a fifth switch connected between the second end of the AC / DC module and the second end of the energy storage battery. a sixth switch disposed in at least one charging and discharging branch, and the sixth switch is connected between the first end and the second end of the DC / DC module in the corresponding charging and discharging branch. The charge and discharge controller is further configured to, in the fourth mode, control the fifth switch to close, and control the first switch, the second switch, and the sixth switch in the fifth charge and discharge branch to close; in the fifth mode, control the first switch, the second switch, and the sixth switch in the sixth charge and discharge branch to close, and control the fifth switch to close.

7. The charging vehicle according to claim 6, wherein the charge and discharge controller is further configured to, in the fourth mode, if charging the fifth electric vehicle and the seventh electric vehicle simultaneously, control the fifth switch to close, control the first switch and the second switch in the fifth charge and discharge branch to close, and control the third switch in the fifth charge and discharge branch and the seventh charge and discharge branch to close.

8. The charging vehicle according to claim 7, wherein the charge and discharge controller is further configured to, in the fifth mode, if the sixth electric vehicle and the eighth electric vehicle discharge to the power grid simultaneously, control the fifth switch to close, control the first switch and the second switch in the sixth charge and discharge branch to close, and control the third switch in the sixth charge and discharge branch and the eighth charge and discharge branch to close.

9. The charging vehicle according to any one of claims 1-8, characterized in that, It further includes: An automatic driving module, configured to, after obtaining the target position of the target electric vehicle to be charged / discharged, automatically drive from the current starting position to the target position for the target electric vehicle to charge / discharge, and after the charge / discharge is completed, automatically drive back to the starting position.

10. A mobile charging and discharging system, characterized in that, It includes: The charging vehicle according to any one of claims 1-9; A user terminal; A cloud platform, configured to implement electric vehicle charge and discharge management by interacting with the user terminal and the charging vehicle respectively.

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