Charging cabinet, charging vehicle and charging system

Abstract

The utility model provides a charging cabinet, a charging vehicle and a charging system. The battery pack in the charging cabinet can be charged through the photovoltaic equipment and the power grid, the battery pack is used for being replaced by the charging vehicle, and then the battery pack replaced by the charging vehicle wirelessly charges the to-be-charged equipment, so that the dependence of the to-be-charged equipment on the power grid can be reduced, the power taking from the power grid is reduced, the cost required for charging the to-be-charged equipment can be reduced, and the charging efficiency of the to-be-charged equipment is improved. And the power grid load is reduced, and the power utilization pressure required by charging is reduced. The charging vehicle can exchange the battery pack from the charging cabinet through the exchange device, then the mobile device drives the charging vehicle to move to the to-be-charged equipment, and when the wireless discharging device of the charging vehicle is aligned with the wireless charging device of the to-be-charged equipment, the to-be-charged equipment can be charged. The to-be-charged equipment does not need to find a fixed charging pile or manually plug and pull a charging gun, so that the charging time of the to-be-charged equipment can be effectively shortened, and the user experience can be improved.

Description

Technical Field

[0001] This application relates to the field of charging technologies, and particularly to a charging cabinet, a charging vehicle, and a charging system. Background Art

[0002] With the continuous development of new energy vehicles, the number of new energy vehicles is increasing. Charging service areas often need to charge multiple new energy vehicles simultaneously, facing problems such as excessive grid charging load and high electricity prices, resulting in great pressure on electricity demand.

[0003] In order to charge new energy vehicles, users often need to drive several kilometers to find a charging pile and may also need to queue. After queuing, they need to manually go to the charging pile to plug and unplug the charging gun to achieve charging, which brings a very poor experience to users. Utility Model Content

[0004] In view of this, this application provides a charging cabinet, a charging vehicle, and a charging system to solve the above technical problems.

[0005] In the first aspect of this application, a charging cabinet is provided. The charging cabinet includes: a cabinet body, which forms an accommodation space; a plurality of battery packs, which are detachably arranged in the accommodation space and are used for the charging vehicle to exchange when the charging vehicle moves to the charging cabinet; wherein, the charging vehicle is used for wirelessly charging a device to be charged; a power conversion device, which is arranged in the accommodation space, and the battery output port of the power conversion device is used to connect a plurality of battery packs, the photovoltaic input port of the power conversion device is used to connect a photovoltaic device, the grid connection port of the power conversion device is used to connect to the power grid, and the power conversion device is used to perform power conversion on the electric energy provided by the photovoltaic device and / or the power grid and output it to the battery output port to charge a plurality of battery packs.

[0006] In one embodiment, the charging cabinet further includes a control device, which is arranged in the accommodation space and is used to control the power conversion device to draw power from the photovoltaic device and / or the power grid to charge a plurality of battery packs.

[0007] In one embodiment, a switchable cabinet door is further arranged on the cabinet body, and the control device is further used to control the opening and closing of the cabinet door.

[0008] In one embodiment, the charging cabinet further includes an induction device, which is connected to the control device; the induction device is used to sense whether there is a charging vehicle at the charging cabinet, and the control device is further used to control the cabinet door to open when there is a charging vehicle at the charging cabinet for the charging vehicle to exchange battery packs.

[0009] In one embodiment, the charging cabinet further includes a display device, which is connected to the power conversion device and a plurality of battery packs. The display device is configured to obtain and indicate the working state of the power conversion device and the remaining power of the plurality of battery packs.

[0010] The second aspect of the present application provides a charging vehicle, which is characterized in that the charging vehicle includes: a moving device for driving the charging vehicle to move; an exchanging device for exchanging a battery pack from the charging cabinet when the moving device drives the charging vehicle to move to the charging cabinet; a battery placement device for placing the battery pack taken by the exchanging device from the charging cabinet; and a wireless discharging device electrically connected to the battery pack placed on the battery placement device. The wireless discharging device is configured to wirelessly transmit the electrical energy of the battery pack to the wireless charging device through the wireless discharging device to wirelessly charge the device to be charged when the moving device drives the charging vehicle to move to a position where the wireless discharging device is aligned with the wireless charging device of the device to be charged.

[0011] In one embodiment, the charging vehicle further includes a control device for controlling the moving device to move to the charging cabinet and the device to be charged, and for controlling the exchanging device to exchange a battery pack from the charging cabinet.

[0012] In one embodiment, the device to be charged is an electric vehicle, and a wireless charging device is provided on the electric vehicle.

[0013] The third aspect of the present application provides a charging system, including a charging cabinet and a charging vehicle;

[0014] The charging cabinet includes a cabinet body, a power conversion device and a plurality of battery packs; the cabinet body forms an accommodation space; the power conversion device is arranged in the accommodation space; the plurality of battery packs are detachably arranged in the accommodation space; the battery output port of the power conversion device is used to connect the plurality of battery packs, the photovoltaic input port of the power conversion device is used to connect a photovoltaic device, and the grid connection port of the power conversion device is used to connect to the power grid. The power conversion device is configured to perform power conversion on the electrical energy provided by the photovoltaic device and / or the power grid and output it to the battery output port to charge the plurality of battery packs; the charging vehicle includes a moving device, an exchanging device, a battery placement device and a wireless discharging device; the moving device is used to drive the charging vehicle to move; the exchanging device is used to exchange a battery pack from the charging cabinet when the moving device drives the charging vehicle to move to the charging cabinet; the battery placement device is used to place the battery pack taken by the exchanging device from the charging cabinet; the wireless discharging device is electrically connected to the battery pack placed on the battery placement device, and the wireless discharging device is configured to wirelessly transmit the electrical energy of the battery pack to the wireless charging device through the wireless discharging device to wirelessly charge the device to be charged when the moving device drives the charging vehicle to move to a position where the wireless discharging device is aligned with the wireless charging device of the device to be charged.

[0015] Compared with the prior art, the present application has at least the following advantages:

[0016] In the embodiment of the present application, since the battery pack in the charging cabinet can be charged through the photovoltaic device and the power grid, and the battery pack is used for the charging vehicle to exchange, and the battery pack exchanged by the charging vehicle is used to wirelessly charge the device to be charged, it can reduce the dependence of the device to be charged on the power grid, reduce the power taken from the power grid, thereby reducing the cost required for charging the device to be charged and reducing the power grid load, and reducing the power demand pressure for charging. The charging vehicle can exchange the battery pack from the charging cabinet through the exchange device, and then the mobile device drives the charging vehicle to move to the device to be charged. When the wireless discharging device of the charging vehicle is aligned with the wireless charging device of the device to be charged, charging of the device to be charged can be realized. The device to be charged does not need to find a fixed charging pile, nor does it need to manually plug and unplug the charging gun, which can effectively reduce the time spent by the device to be charged on charging, and thus improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic block diagram of the charging system.

[0018] Figure 2 is a schematic diagram of the modules of the charging cabinet provided by the embodiment of the present application.

[0019] Figure 3 is a schematic diagram of the modules of the charging cabinet provided by another embodiment of the present application.

[0020] Figure 4 is a schematic diagram of the modules of the charging vehicle provided by the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. Without conflict, the following different embodiments and the features in the embodiments can be combined with each other.

[0022] It should be noted that when a device is referred to as being "connected" to another device, it can be directly connected to the other device or can also be indirectly connected (with an intermediate device).

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0024] With the continuous development of new energy vehicles, the number of new energy vehicles is increasing continuously, facing the problems of shortage of charging spaces, excessive charging load in the charging service area, and high electricity prices, resulting in great pressure on electricity demand.

[0025] In order to charge new energy vehicles, users often need to drive several kilometers to find a charging pile, and may also need to queue. After queuing, they still need to manually plug and unplug the charging gun at the charging pile to achieve charging, which brings a very poor experience to users.

[0026] Therefore, the embodiments of this application provide a charging cabinet, a charging vehicle and a charging system to solve the above technical problems.

[0027] Please refer to Figure 1 , Figure 1 which is a schematic diagram of a module of the charging system according to the embodiment of this application.

[0028] As Figure 1 shown, the charging system includes a charging cabinet 100 and a charging vehicle 200.

[0029] Among them, the charging cabinet 100 includes a cabinet body (not shown in the figure), a power conversion device 110 and a plurality of battery packs 120.

[0030] The cabinet body forms an accommodating space, the power conversion device 110 is arranged in the accommodating space, and a plurality of battery packs 120 are detachably arranged in the accommodating space.

[0031] The battery output port of the power conversion device 110 is used to connect a plurality of battery packs 120, the photovoltaic input port of the power conversion device 110 is used to connect a photovoltaic device 300, the grid connection port of the power conversion device 110 is used to connect a power grid 400, and the power conversion device 110 is used to perform power conversion on the electric energy of the photovoltaic device 300 and / or the power grid 400 and output it to the battery output port to charge a plurality of battery packs 120.

[0032] A plurality of battery packs 120 are used for the charging vehicle 200 to exchange when the charging vehicle 200 moves to the charging cabinet 100.

[0033] In the embodiment of this application, a plurality of battery packs 120 can be connected in series, and each battery pack 120 can be switched into or out of connection with the power conversion device 110 through a series switch group. The power conversion device 110 can charge the battery packs 120 connected in.

[0034] It can be understood that several battery packs 120 can also be connected to the power conversion device 110 in parallel. The power conversion device 110 can charge several battery packs 120 simultaneously, or can charge a single battery pack 120 or two or several of the battery packs 120 alone. The embodiments of the present application do not limit this.

[0035] Please refer to Figure 2 , the charging cabinet 100 further includes a first control device 130, and the first control device 130 is arranged in the accommodating space. The first control device 130 is used to control the power conversion device 110 to draw power from the photovoltaic device 300 and / or the power grid 400 to charge several battery packs 120.

[0036] The first control device 130 can be used to control the power conversion device 110 to perform power conversion. It can be understood that the electric energy of the power grid 400 is more stable than that of the photovoltaic device 300. Therefore, when the charging vehicle 200 needs to exchange the battery pack 120 from the charging cabinet 100, in order to quickly charge the battery pack 120 for the charging vehicle 200 to exchange, the first control device 130 can control the power conversion device 110 to draw power from the power grid 400 to charge the battery pack 120. When the charging vehicle 200 does not move to the charging cabinet 200 to exchange the battery 140 and the photovoltaic device 300 has electric energy, the first control device 130 can control the power conversion device 110 to draw power from the photovoltaic device 300 to charge the battery pack 120.

[0037] In some embodiments, an openable and closable cabinet door (not shown in the figure) is further provided on the cabinet body of the charging cabinet 100, and the first control device 130 can also be used to control the opening and closing of the cabinet door. In this way, when the charging vehicle 200 needs to exchange the battery pack 120, the first control device 130 can control the cabinet door to open for the charging vehicle 200 to exchange the battery pack 120 from the cabinet door.

[0038] Furthermore, as Figure 3 shown, the charging cabinet 100 may further include a sensing device 140, and the sensing device 140 is connected to the first control device 130. The sensing device 140 is used to sense whether there is a charging vehicle 200 at the charging cabinet 100. The first control device 130 is further used to control the cabinet door to open when there is a charging vehicle 200 at the charging cabinet 100 for the charging vehicle 200 to exchange the battery pack 120.

[0039] Specifically, the sensing device 140 can be arranged at the cabinet door of the charging cabinet 100. When the sensing device 140 senses the charging vehicle 200, it means that the charging vehicle 200 has moved to the cabinet door of the charging cabinet 100. The sensing device 140 can send a signal indicating the arrival of the charging vehicle 200 to the first control device 130, and the first control device 130 controls the cabinet door to open so that the charging vehicle 200 can exchange the battery pack 120.

[0040] Among them, the sensing device 140 can be a camera device, an infrared sensing device 140, etc.

[0041] In some other embodiments, the sensing device 140 can be a geomagnetic field, which can be set on the ground on the surface where the cabinet door of the charging cabinet 100 is located. The geomagnetic field can confirm whether the charging vehicle 200 has moved to the cabinet door by detecting pressure changes.

[0042] Please refer to again Figure 3 , in some embodiments, the charging cabinet 100 further includes a display device 150. The display device 150 is connected to the power conversion device 110 and several battery packs 120. The display device 150 is used to obtain and indicate the working state of the power conversion device 110 and the remaining power of several battery packs 120.

[0043] Thus, relevant staff or users can also learn about the working state of the power conversion device 110 of the charging cabinet 100 and the remaining power of several battery packs 120 through the display device 150.

[0044] In some embodiments, in order to facilitate remote monitoring and management of the charging cabinet 100 by relevant personnel, the charging cabinet 100 can also be communicatively connected to a remote terminal (not shown in the figure). In this way, the charging cabinet 100 can send the working state information of the power conversion device 110 and the battery state information of several battery packs 120 to the remote terminal, so that relevant personnel can monitor the state of the charging cabinet 100 in real time through the remote terminal.

[0045] In some specific examples, the working state information of the power conversion device 110 and the battery state information of several battery packs 120 can be obtained through the first control device 130. The first control device 130 communicates with the remote terminal and sends the working state information and the battery state information to the remote terminal. The remote terminal can be a mobile phone, a computer, etc. The remote terminal can be installed with relevant application programs. When receiving the working state information and the battery state information sent by the first control device 130, it is displayed through the relevant application programs. Furthermore, users can monitor the working state of the power conversion device 110 in the charging cabinet 100 and the state of several battery packs 120 in real time through the remote terminal.

[0046] The charging vehicle 200 includes a moving device 210, an exchanging device 220, a battery placement device 230, and a wireless discharging device 240.

[0047] The moving device 210 is used to drive the charging vehicle 200 to move. The moving device 210 can be wheels and a power system (not shown in the figure). The power system is used to drive the wheels to rotate, thereby driving the charging vehicle 200 to move.

[0048] The exchange device 220 is used to exchange the battery pack 120 from the charging cabinet 100 when the mobile device 210 drives the charging vehicle 200 to move to the charging cabinet 100.

[0049] The battery placement device 230 is used to place the battery pack 120 taken by the exchange device 220 from the charging cabinet 100. Among them, the exchange device 220 can take the battery pack to be replaced from the battery placement device 230, move the battery pack to be replaced into the charging cabinet 100, then take the battery pack to be taken from the charging cabinet 100 and move it to the battery placement device 230, and store it in the battery placement device 230.

[0050] In some specific examples, the exchange device 220 can be a robotic arm with a gripper mechanism, a robotic arm with a magnetic attraction structure, and so on.

[0051] The wireless charging device 240 is electrically connected to the battery pack 120 placed on the battery placement device 230. The wireless charging device 240 is used to wirelessly transmit the electrical energy of the battery pack 120 to the wireless charging device through the wireless charging device 240 to wirelessly charge the device to be charged when the mobile device 210 drives the charging vehicle 200 to move to the position where the wireless charging device 240 of the charging vehicle 200 is aligned with the wireless charging device of the device to be charged.

[0052] It can be understood that the wireless charging device 240 of the charging vehicle 200 and the wireless charging device of the device to be charged can be respectively provided with magnetic attraction structures that attract each other. In this way, when the wireless charging device 240 is aligned with the wireless charging device, the adsorption between the wireless charging device 240 and the wireless charging device is realized through the magnetic attraction structure, so as to realize the stable connection between the wireless charging device 240 and the wireless charging device, and enable the charging vehicle 200 to stably wirelessly charge the device to be charged.

[0053] Since the battery pack 120 in the charging cabinet 100 can be charged by the photovoltaic device 300 and the power grid 400, and the battery pack 120 is used for the charging vehicle 200 to exchange, and then the battery pack 120 exchanged by the charging vehicle 200 charges the device to be charged, it can reduce the dependence of the device to be charged on the power grid 400, reduce the power taken from the power grid 400, thereby reducing the cost required for charging the device to be charged, reducing the power grid load, and reducing the power demand pressure for charging. The charging vehicle 200 can exchange the battery pack 120 from the charging cabinet 100 through the exchange device 220, and then the mobile device 210 drives the charging vehicle 200 to move to the device to be charged. When the wireless charging device 240 of the charging vehicle 200 is aligned with the wireless charging device of the device to be charged, charging of the device to be charged can be realized. The device to be charged does not need to find a fixed charging pile, nor does it need to manually plug and unplug the charging gun, which can effectively reduce the time spent by the device to be charged on charging, and thus can improve the user experience.

[0054] It can be understood that a placement space for the battery pack 120 is provided on the battery placement device 230, and a jack or a plug electrically connected to the wireless charging device 240 is provided in the placement space. When the battery pack 120 is stored in the battery placement device 230, the battery pack 120 is placed in the placement space, and its positive and negative terminals are electrically connected to the wireless charging device 240 through the jack or the plug.

[0055] In the embodiment of the present application, one or more battery packs 120 can be placed on the battery placement device 230.

[0056] Please refer to Figure 4 , in some embodiments, the charging vehicle 200 may further include a second control device 250. The second control device 250 is configured to control the moving device 210 to move to the charging cabinet 100 and the device to be charged, and the second control device 250 is further configured to control the replacement device 220 to replace the battery pack 120 from the charging cabinet 100.

[0057] Thus, automatic movement of the moving device 210 and automatic replacement of the battery pack 120 by the replacement device 220 can be achieved.

[0058] It can be understood that, in order to enable the charging vehicle 200 to move to the charging cabinet 100 to replace the battery pack 120 and move to the device to be charged to charge the device to be charged. The second control device 250 in the charging vehicle 200 can be communicatively connected to the charging cabinet 100 and the device to be charged to perform information interaction with the charging cabinet 100 and the device to be charged. An image recognition device, a lidar, an obstacle avoidance sensor, etc. can also be provided in the charging vehicle 200. The second control device 250 can obtain the position information sent by the charging cabinet 100 and the device to be charged through communication with the charging cabinet 100 and the device to be charged. The second control device 250 can be connected to devices such as an image recognition device, a lidar, and an obstacle avoidance sensor to perform path planning for the charging vehicle 200 according to the environmental information obtained by the image recognition device, the lidar, the obstacle avoidance sensor, etc. and the obtained position information, so that the charging vehicle 200 can smoothly move to the charging cabinet 100 and the device to be charged. In the embodiment of the present application, the charging vehicle 200 is an Automated Guided Vehicle (AGV).

[0059] In the embodiment of the present application, the second control device 250 can be communicatively connected to the first control device 130 in the charging cabinet 100. Among them, the second control device 250 and the first control device 130 can be communicatively connected through wireless communication technologies such as 4G, WIFI, and Lan.

[0060] In some embodiments, the charging cabinet 100 and the charging vehicle 200 can be used to charge devices to be charged in a specific area. When a device to be charged enters or plans to enter a specific area and needs to be charged, the device to be charged can send a reservation charging signal to the charging vehicle 200 in the specific area. The charging vehicle 200 confirms whether to send a reservation battery replacement signal to the charging cabinet 100 according to the reservation charging signal and the battery pack 120 inside it. When the power of the battery pack 120 in the charging vehicle 200 cannot meet the required power of the device to be charged, the charging vehicle 200 sends a reservation battery replacement signal to the charging cabinet 100, moves from the current position to the charging cabinet 100, exchanges the battery pack 120 at the charging cabinet 100, then moves to the device to be charged, and aligns its wireless discharging device 240 with the wireless charging device of the device to be charged to charge the device to be charged. When the power of the battery pack 120 in the charging vehicle 200 can meet the required power of the device to be charged, the charging vehicle 200 directly moves to the device to be charged without moving to the charging cabinet 100 to exchange the battery pack 120.

[0061] It can be understood that the position of the charging cabinet 100 can be fixed, and the position information of the charging cabinet 100 can be built into the charging vehicle 200. However, the position of the device to be charged is unknown. When the device to be charged sends a reservation charging signal to the charging vehicle 200, the reservation charging signal can carry the position information or identity identifier of the device to be charged, so that the charging vehicle 200 can move to the device to be charged according to the position information, or find the device to be charged in the specific area through devices such as an image recognition device and a lidar according to the identity identifier.

[0062] It can be understood that when the charging vehicle 200 arrives at the device to be charged, the second control device 250 can also be communicatively connected to the device to be charged to interact with the device to be charged and control the wireless discharging device 240 to charge the device to be charged according to the interaction information.

[0063] In the embodiments of the present application, the device to be charged can be an electric vehicle, and a wireless charging device is provided on the electric vehicle. The electric vehicle can be an electric car or an electric motorcycle, and the present application does not limit this.

[0064] When the device to be charged is an electric car, the charging cabinet 100 and the charging vehicle 200 can be used to charge the electric cars in a specific parking lot. When an electric car enters or plans to enter the specific parking lot and needs to be charged, the electric car can send a reservation charging signal to the charging vehicle 200 in the specific parking lot.

[0065] The reservation charging signal sent by the electric vehicle may include its required power information, its waiting parking space or its license plate number, so that the charging vehicle 200 can plan its path according to its waiting parking space, or the charging vehicle 200 can find the electric vehicle to be charged in a specific parking lot through its image recognition device, lidar and other devices according to its license plate number, and then charge the electric vehicle.

[0066] Thus, the charging vehicle 200 can move to the parking position of the electric vehicle, and the wireless charging of the electric vehicle can be realized through the wireless discharging device 240 of the charging vehicle 200 and the wireless charging device of the electric vehicle. There is no need for the vehicle owner to find a fixed charging pile, nor does the vehicle owner need to get out of the car to plug and unplug the charging gun, which can effectively reduce the time spent by the electric vehicle on charging, and then improve the vehicle owner experience. Moreover, since several battery packs 120 in the charging cabinet 100 can be charged by the photovoltaic device 300, the dependence on the power grid 400 can also be reduced, and then the power taken from the power grid 400 can be reduced, so that the cost required for charging the electric vehicle can be reduced.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A charging cabinet, characterized in that: The charging cabinet comprises: A cabinet body, wherein the cabinet body is formed with an accommodating space; A plurality of battery packs, wherein the plurality of battery packs are pluggably placed in the accommodating space, and the battery packs are used to be replaced by the charging vehicle when the charging vehicle moves to the charging cabinet; wherein the charging vehicle is used to wirelessly charge the device to be charged; A power conversion device is arranged in the accommodating space, and the battery output port of the power conversion device is used to connect to the plurality of battery packs, the photovoltaic input port of the power conversion device is used to connect to the photovoltaic equipment, and the grid-connected port of the power conversion device is used to connect to the power grid. The power conversion device is used to convert the electric energy provided by the photovoltaic equipment and / or the power grid and output it to the battery output port to charge the plurality of battery packs.

2. The charging cabinet according to claim 1, characterized in that: The charging cabinet also includes a control device, which is arranged in the accommodating space. The control device is used to control the power conversion device to draw power from the photovoltaic device and / or the power grid to charge the plurality of battery packs.

3. The charging cabinet according to claim 2, characterized in that: The cabinet body is also provided with an openable and closable cabinet door, and the control device is also used to control the opening and closing of the cabinet door.

4. The charging cabinet according to claim 3, characterized in that: The charging cabinet also includes a sensing device, which is connected to the control device; the sensing device is used to sense whether the charging vehicle is present at the charging cabinet, and the control device is also used to control the cabinet door to open when the charging vehicle is present at the charging cabinet, so that the charging vehicle can exchange the battery pack.

5. The charging cabinet according to any one of claims 1 to 4, characterized in that: The charging cabinet also includes a display device, which is connected to the power conversion device and the plurality of battery packs, and is used to obtain and indicate the working status of the power conversion device and the remaining power of the plurality of battery packs.

6. A charging vehicle, characterized in that: The charging vehicle comprises: A moving device, the moving device is used to drive the charging vehicle to move; A replacement device, the replacement device is used to replace the battery pack from the charging cabinet when the mobile device drives the charging vehicle to move to the charging cabinet; a battery placement device, the battery placement device being used to place the battery pack taken from the charging cabinet by the exchange device; and A wireless discharge device, wherein the wireless discharge device is electrically connected to the battery pack placed on the battery placement device, and is used to wirelessly transmit the electrical energy of the battery pack to the wireless charging device through the wireless discharge device when the mobile device drives the charging vehicle to align the wireless discharge device with the wireless charging device of the device to be charged, so as to wirelessly charge the device to be charged.

7. The charging vehicle according to claim 6, characterized in that: The charging vehicle also includes a control device, which is used to control the moving device to move to the charging cabinet and the device to be charged, and to control the exchanging device to exchange the battery pack from the charging cabinet.

8. The charging vehicle according to claim 6 or 7, characterized in that: The device to be charged is an electric vehicle, and the wireless charging device is arranged on the electric vehicle.

9. A charging system, characterized in that: It comprises a charging cabinet and a charging vehicle; the charging cabinet comprises a cabinet body, a power conversion device and a plurality of battery packs; the cabinet body is formed with a containing space; the power conversion device is arranged in the containing space; a plurality of battery packs are pluggably arranged in the containing space; the battery output port of the power conversion device is used to connect a plurality of battery packs, the photovoltaic input port of the power conversion device is used to connect a photovoltaic device, the grid-connected port of the power conversion device is used to connect a power grid, and the power conversion device is used to convert the electric energy provided by the photovoltaic device and / or the power grid and output it to the battery output port to charge a plurality of battery packs; The charging cart includes a moving device, a replacement device, a battery placement device and a wireless discharge device; the moving device is used to drive the charging cart to move; the replacement device is used to replace the battery pack from the charging cabinet when the moving device drives the charging cart to move to the charging cabinet; the battery placement device is used to place the battery pack taken from the charging cabinet by the replacement device; the wireless discharge device is electrically connected to the battery pack placed on the battery placement device, and the wireless discharge device is used to wirelessly transmit the electric energy of the battery pack to the wireless charging device through the wireless discharge device when the moving device drives the charging cart to move to the position where the wireless discharge device is aligned with the wireless charging device of the device to be charged, so as to wirelessly charge the device to be charged.

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