Mobile power supply system and method

Abstract

The embodiment of the present invention discloses a mobile power supply system and method. The system includes: a mobile carrier, a battery pack placed on the mobile carrier, a discharge controller and a power output device; the battery pack is connected to the discharge controller and the power output device respectively, wherein the mobile carrier is used to carry the battery pack, the discharge controller and the power output device to move to the target address based on the received movement instruction containing the target address; the discharge controller is used to send a discharge control instruction to the battery pack; the battery pack is used to output electric energy to the power output device based on the received discharge control instruction; the power output device is used to transmit the electric energy output by the battery pack to the target device to charge the target device. The technical solution of the embodiment of the present invention can solve the problem of not being able to provide charging services to the target device in a timely manner, improve the flexibility of the charging service, and increase the user experience.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of energy power supply technology, and in particular to a mobile power supply system and method. Background Art

[0002] The existing power system is installed at a fixed location, and uses a fixed cable transmission method on the transmission side to provide power for electric vehicles and places with power restrictions or emergency power supply. However, the existing fixed power system requires users to transport the equipment to be charged to the fixed power system before the charging process can be realized; the charging service cannot be provided in a timely manner, the charging service is not flexible, and the user experience is low. Summary of the invention

[0003] The embodiments of the present invention provide a mobile power supply system and method to provide charging services for target devices in a timely manner, thereby improving the flexibility of charging services and enhancing user experience.

[0004] In a first aspect, an embodiment of the present invention provides a mobile power supply system, comprising: a mobile carrier, a battery pack placed on the mobile carrier, a discharge controller and a power output device; the battery pack is connected to the discharge controller and the power output device respectively, wherein:

[0005] The mobile carrier is used to carry the battery pack, the discharge controller and the output device to move to the target address based on the received movement instruction containing the target address;

[0006] The discharge controller is used to send a discharge control instruction to the battery pack;

[0007] The battery pack is used to output electric energy to the power output device based on the received discharge control instruction;

[0008] The power output device is used to transmit the electric energy output by the battery pack to the target device so as to charge the target device.

[0009] In a second aspect, an embodiment of the present invention further provides a mobile power supply method, which is applied to a mobile power supply system, wherein the mobile power supply system includes a mobile carrier, a battery pack placed on the mobile carrier, a discharge controller, and a power output device; the battery pack is connected to the discharge controller and the power output device respectively, and the method includes:

[0010] The mobile carrier carries the battery pack, the discharge controller and the output device to move to the target address based on the received movement instruction including the target address;

[0011] Sending a discharge control instruction to the battery pack through the discharge controller;

[0012] outputting electric energy to the power output device through the battery pack based on the received discharge control instruction;

[0013] The electric energy output by the battery pack is transmitted to the target device through the power output device to perform a charging operation on the target device.

[0014] A mobile power supply system provided by an embodiment of the present invention includes: a mobile carrier, a battery pack placed on the mobile carrier, a discharge controller and a power output device; the battery pack is connected to the discharge controller and the power output device respectively, and the mobile carrier moves the battery pack, the discharge controller and the power output device to the target address based on the received movement instruction containing the target address, and the discharge controller sends a discharge control instruction to the battery pack to make the battery pack output electric energy to the power output device, and the power output device transmits the electric energy to the target device to complete the charging operation of the target device, thereby solving the problem of not being able to provide charging services to the target device in a timely manner, improving the flexibility of the charging service, and enhancing the user experience.

[0015] In addition, a mobile power supply method provided by the present invention corresponds to the above system and has the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A structural diagram of a mobile power supply system provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of a mobile power supply system provided by an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of charging an electric vehicle provided by an embodiment of the present invention;

[0020] Figure 4 A flow chart of a mobile power supply method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0022] It should also be noted that, for ease of description, only the part relevant to the present invention but not all content is shown in the accompanying drawings. It should be mentioned before discussing exemplary embodiments in more detail that some exemplary embodiments are described as processing or methods depicted as flow charts. Although the flow chart describes each operation (or step) as sequential processing, many operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of each operation can be rearranged. When its operation is completed, the processing can be terminated, but it can also have additional steps not included in the accompanying drawings. The processing can correspond to methods, functions, procedures, subroutines, subprograms, etc.

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Embodiment 1

[0025] Figure 1 The structure diagram of a mobile power supply system provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the system of this embodiment includes: a mobile carrier 10, a battery pack 11 placed on the mobile carrier, a discharge controller 12 and a power output device 13; the battery pack 11 is connected to the discharge controller 12 and the power output device 13 respectively, wherein:

[0026] The mobile carrier 10 is used to carry the battery pack 11, the discharge controller 12 and the power output device 13 to move to the target address based on the received movement instruction containing the target address.

[0027] In a specific implementation, when the target device needs to be charged, a moving instruction can be sent to the mobile carrier 10, and the moving instruction includes the target address of the target device. Based on the received moving instruction, the mobile carrier 10 can carry the battery pack 10, the discharge controller 12 and the power output device 13 to the target address to perform charging operations for the target device. Exemplarily, the mobile carrier 10 can be a movable vehicle such as a truck, and the mobile carrier 10 can be a manually driven vehicle or an intelligent automatic driving vehicle, which is not limited in this embodiment of the present invention. It should be noted that the target device can be a tram that needs to be charged, or equipment in a power plant that needs to provide electricity.

[0028] Furthermore, after receiving the moving instruction, the mobile carrier 10 can determine the estimated time to reach the target address based on the target address and the current address contained in the moving instruction, and can feed back the estimated time to the target device so that the user can better understand the charging progress.

[0029] The discharge controller 12 is used to send a discharge control instruction to the battery pack 11 .

[0030] Specifically, when the mobile carrier 10 reaches the target address, the discharge controller 12 can send a discharge control instruction to the battery pack 11, and the discharge control instruction can trigger the battery pack 11 to perform a discharge operation. Exemplarily, the discharge control instruction includes at least one discharge parameter of discharge time, discharge power, maximum current and cut-off voltage, and the battery pack 11 can output electric energy according to the discharge parameter in the discharge control instruction.

[0031] The battery pack 11 is used to output electric energy to the power output device 13 based on the received discharge control instruction.

[0032] Specifically, after receiving the discharge control instruction, the battery pack 11 can output corresponding electric energy to the power output device 13 based on the discharge parameters contained in the discharge control instruction. It should be noted that when the discharge control instruction does not specify discharge parameters such as discharge duration, discharge power, maximum current and cut-off voltage, the battery pack 11 can output electric energy according to the maximum discharge power that can be provided at present until the target device is fully charged, or the battery pack 11 stops the discharge operation when the electric energy that can be provided is empty.

[0033] Optionally, the system provided by the embodiment of the present invention further includes: a battery fixing device connected to the battery pack, the battery fixing device being installed on a mobile carrier; and the battery fixing device being used to place the battery pack so that the battery pack is fixed on the mobile carrier.

[0034] Specifically, the battery pack 11 needs to remain stable on the mobile carrier 10 to ensure the safety of each device in the system and the safety of discharge to the target device. Therefore, the system provided in the embodiment of the present invention also includes a battery fixing device, and the battery pack can be placed in the battery fixing device so that the battery pack and the mobile carrier remain fixed and can operate together. Exemplarily, the battery fixing device can be a frame fixedly connected to the mobile carrier.

[0035] The power output device 13 is used to transmit the power output by the battery pack 11 to the target device to charge the target device.

[0036] In a specific implementation, the power output device 13 can convert the power outputted by the battery pack 11 into a form acceptable to the target device and transmit it to the target device to realize the charging operation of the target device. For example, the power output device can be determined according to the type of power that the target device can accept.

[0037] Optionally, the power output device includes a DC charging pile, and the system also includes: a DC converter connected to the DC charging pile and the battery pack respectively; wherein the DC converter is used to convert the received electric energy into DC electric energy of a preset voltage level when receiving the electric energy output by the battery pack, and transmit the DC electric energy to the DC charging pile; the DC charging pile is used to transmit the received DC electric energy to the target device so as to charge the target device.

[0038] Specifically, when the target device requires a DC power source, the power output device includes a DC charging pile. The system also includes a DC converter connected to the DC charging pile and the battery pack. After the battery pack outputs electrical energy, the DC converter converts the electrical energy into DC power of a preset voltage level. It should be noted that the DC converter can set the preset voltage level according to different target devices to ensure that the output voltage level is suitable for the target device and ensure the safety of the target device.

[0039] Furthermore, the converted DC power is input into a DC charging pile, and the DC charging pile is connected to the target device to input the DC power into the target device, thereby completing the charging operation of the target device.

[0040] Optionally, the power output device also includes a vehicle-to-grid discharge device; the vehicle-to-grid discharge device is used to convert the received electric energy into AC electric energy when receiving the electric energy output by the battery pack, and transmit the AC electric energy to the target device to perform charging operations on the target device.

[0041] Specifically, when the target device is a power plant power supply device, an AC power supply is required, and the power output device is a vehicle-to-grid discharge device. The vehicle-to-grid discharge device converts the power output of the battery pack into AC power of a preset voltage level. For example, the preset voltage level can be 220V to improve charging efficiency and meet the charging requirements of the power plant.

[0042] A mobile power supply system provided by an embodiment of the present invention includes: a mobile carrier, a battery pack placed on the mobile carrier, a discharge controller and a power output device; the battery pack is connected to the discharge controller and the power output device respectively, and the mobile carrier moves the battery pack, the discharge controller and the power output device to the target address based on the received movement instruction containing the target address, and the discharge controller sends a discharge control instruction to the battery pack to make the battery pack output electric energy to the power output device, and the power output device transmits the electric energy to the target device to complete the charging operation of the target device, thereby solving the problem of not being able to provide charging services to the target device in a timely manner, improving the flexibility of the charging service, and enhancing the user experience.

[0043] Embodiment 2

[0044] The embodiments of the present invention are optimized based on the above technical solutions. The explanations of the terms that are the same as or corresponding to the above embodiments are not repeated here.

[0045] The difference between the embodiment of the present invention and the above-mentioned embodiment is that, optionally, the number of battery packs is two or more, the number of discharge controllers is the same as the number of battery packs, and the discharge controllers are connected to the battery packs in a one-to-one correspondence.

[0046] Specifically, the discharge controller is connected to the battery pack in a one-to-one correspondence, so that one discharge controller controls the discharge operation of only one battery pack, and different discharge control instructions can be sent to each battery pack to more flexibly control the discharge operation of each battery pack. It should be noted that those skilled in the art can also set one discharge controller to control two or more battery packs to perform discharge operations according to actual application requirements, and this embodiment of the present invention is not limited to this.

[0047] Optionally, the system provided by the embodiment of the present invention further includes: a switch component connected to the battery pack and the power output device respectively, and a battery selector connected to each switch component and each discharge controller, wherein the battery selector is used to determine the battery pack for providing electrical energy among each battery pack, send a closing instruction to the switch component connected to each battery pack providing electrical energy, and send a control output instruction to the discharge controller corresponding to the battery pack providing electrical energy; the switch component is used to receive the closing instruction sent by the battery selector, and perform a corresponding closing operation based on the closing instruction to connect the battery pack and the power output device; the discharge controller is also used to send a discharge control instruction to the corresponding battery pack based on the received control output instruction.

[0048] Specifically, the switch component includes a relay and / or a switch diode. The battery selector can determine the battery pack for providing electrical energy from each battery pack, and control the switch component corresponding to the battery pack to be in a closed state to establish a connection between the battery pack and the power output device to provide electrical energy to the target device. The battery selector can also send a control output instruction to the discharge controller corresponding to the battery pack providing electrical energy, so that the corresponding discharge controller controls the battery pack to perform a discharge operation.

[0049] Optionally, the battery selector includes: a status acquisition module, connected to each battery pack, for acquiring the battery status of each battery pack, determining whether the battery status of each battery pack meets preset conditions, and if so, determining the battery pack that meets the preset conditions as the battery pack for providing electrical energy.

[0050] Specifically, the battery selector includes a status acquisition module for acquiring the battery status of each battery pack. The battery status includes the battery power, whether it is faulty, etc. If the battery status meets the preset conditions, it means that the battery pack can be used to provide power, and a control output instruction can be sent to the discharge controller corresponding to the battery pack that meets the preset conditions, and a closing instruction can be sent to the switch component corresponding to the battery pack that meets the preset conditions. Exemplarily, the preset conditions include that the battery power is greater than a preset threshold and the battery pack is in a healthy idle state.

[0051] Optionally, the system provided by an embodiment of the present invention further includes: a charging controller connected to the battery pack and the mobile carrier; the charging controller is used to monitor the remaining power value of the battery pack, and when the remaining power value is less than a preset threshold, a charging instruction is generated and sent to the mobile carrier to move the mobile carrier to a preset charging address.

[0052] It should be noted that when the battery packs in the mobile power supply system are low on power, each battery pack needs to be charged in time so as to provide power to other devices in time. Therefore, the system also includes a charging controller for monitoring the remaining power of each battery pack. When the remaining power of each battery is less than the preset threshold, it means that each battery pack is currently unable to provide power to other devices and needs to be charged. The charging controller can generate a charging instruction and send it to the mobile carrier. Furthermore, the charging address can be pre-stored, and a charging instruction containing the charging address can be generated and sent to the mobile carrier so that the mobile carrier moves to the preset charging address. When the remaining power value is greater than or equal to the preset threshold, there is no need to charge each battery pack.

[0053] Furthermore, when the charging controller detects that the remaining power value is less than a preset threshold, it can also search whether there is a charging device for charging the mobile power supply system within a preset range. If so, the charging address of each charging device is obtained, and the charging address closest to the mobile power supply system is determined as the target charging address. Based on the target charging address, a charging instruction is generated and sent to the mobile carrier, so that the mobile carrier drives to the target charging address to charge each battery pack. If it does not exist, the battery pack and other equipment can be moved to the default charging address according to the pre-stored default charging address for charging.

[0054] The mobile power supply system provided in the embodiment of the present invention can select a battery pack that meets preset conditions through a battery selector to discharge the target device, thereby ensuring the safety of the discharge process; and can detect the power status of each battery pack through a charging controller and charge each battery pack in time, thereby better providing discharge services for the target device.

[0055] Embodiment 3

[0056] The embodiments corresponding to the mobile power supply system are described in detail above. In order to make the technical scheme of the present method further clear to those skilled in the art, a specific application scenario is given below.

[0057] In one embodiment, the mobile carrier may be a truck. Figure 2 A schematic diagram of a mobile power supply system provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the system includes a truck, six battery packs, a bidirectional DC charging pile, a charge and discharge control system, a multi-channel DC converter and a vehicle-to-grid (V2G) device. The charge and discharge control system may include at least one charge and discharge controller for controlling the charge and discharge operations of each battery pack.

[0058] Furthermore, the battery fixing device can be fixed on the truck, and each battery pack can be placed in the battery fixing device respectively. Through the high and low voltage connectors installed on the battery fixing device, communication and control between the battery pack and the charging and discharging control system, bidirectional DC charging pile and other equipment can be achieved to perform DC fast charging on each electric vehicle.

[0059] Specifically, the battery pack, multi-channel DC converter and bidirectional DC charging pile work together to provide DC power for electric vehicles and other equipment. The battery, charge and discharge control system and vehicle-to-grid (V2G) equipment can provide AC power to power plants to realize emergency power supply function.

[0060] Figure 3 The schematic diagram of charging an electric vehicle provided by an embodiment of the present invention; Figure 3 As shown, each charge and discharge controller can be connected to each battery pack by bus communication, and connected to the vehicle-to-grid equipment through a switch component. The system also includes a battery selector for determining the switch state of each switch component K1-K4 based on the battery state of each battery pack, thereby determining the battery pack that provides electrical energy.

[0061] Exemplarily, when switches K1 and K4 are closed, battery pack 1 and battery pack 4 are connected to the vehicle-to-grid device to provide 220 V AC power. Furthermore, the battery selector may also be connected to each charge and discharge controller to input control output instructions to each charge and discharge controller.

[0062] Furthermore, the battery pack may include a battery management module for monitoring the battery status such as the health status and charge status of the battery pack, and sending the battery status to the battery selector so that the battery selector determines the switching state of the switch component based on the battery status.

[0063] The battery selector can obtain the battery status of each battery pack. The battery status includes the battery charge, whether it is faulty, etc. If the battery status meets the preset conditions, it means that the battery pack can be used to provide electrical energy, and a control output instruction can be sent to the charge and discharge controller corresponding to the battery pack that meets the preset conditions, and a closing instruction can be sent to the switch component corresponding to the battery pack that meets the preset conditions. Exemplarily, the preset conditions include that the battery charge is greater than a preset threshold and the battery pack is in a healthy idle state. Furthermore, if the battery status does not meet the preset conditions, the switch component corresponding to the battery pack is kept in an open state.

[0064] Exemplarily, the battery selector can also monitor whether the current state of the system meets the discharge conditions, and the discharge conditions can be that there are no abnormalities in the battery pack, insulation equipment, switch components, etc. When the current state meets the discharge conditions, a discharge control instruction is sent to each charge and discharge controller to enable each battery pack to discharge normally. When the current state does not meet the discharge conditions, it means that there are abnormalities in the battery pack, insulation equipment, and switch components, and an abnormal instruction can be generated and sent to the truck. The abnormal instruction contains a maintenance address. After receiving the abnormal instruction containing the maintenance address, the truck carries the battery pack and other equipment to the maintenance address to promptly repair the mobile power supply system, thereby ensuring the safety and effectiveness of each device during the power supply process.

[0065] Furthermore, switch components may be included between the DC charging pile and the battery pack. The battery selector can be used to control each switch component to determine the battery pack that provides electrical energy, and the switch component corresponding to the battery pack can be closed to establish a connection between the battery pack and the DC charging pile to provide DC power to target devices such as electric vehicles.

[0066] Specifically, when the charge and discharge controller detects that the remaining power value is less than a preset threshold, it can also generate a charging instruction based on a pre-stored charging address and send it to the mobile carrier, so that the mobile carrier travels to the charging address to charge each battery pack.

[0067] The mobile power supply system provided by the embodiment of the present invention can select a battery pack that meets preset conditions through a battery selector to discharge the target device, and can charge each battery pack in time by detecting the power status of each battery pack, thereby better providing discharge services for the target device and ensuring the safety of the discharge process.

[0068] Embodiment 4

[0069] Figure 4 A flow chart of a mobile power supply method provided by an embodiment of the present invention, such as Figure 4As shown, a mobile power supply method provided by an embodiment of the present invention is applied to a mobile power supply system, the mobile power supply system includes a mobile carrier, a battery pack placed on the mobile carrier, a discharge controller and a power output device; the battery pack is connected to the discharge controller and the power output device respectively, wherein the mobile power supply method includes:

[0070] S101, using a mobile carrier to move a battery pack, a discharge controller and a power output device to a target address based on a received movement instruction including a target address.

[0071] S102: Send a discharge control instruction to the battery pack via a discharge controller.

[0072] S103 . Outputting electric energy to a power output device through the battery pack based on the received discharge control instruction.

[0073] S104: Transmitting the electric energy output by the battery pack to the target device through the power output device to charge the target device.

[0074] Based on any optional technical solution in the embodiments of the present invention, optionally, the power output device includes a DC charging pile, and the system further includes: a DC converter connected to the DC charging pile and the battery pack respectively; wherein,

[0075] When receiving the electric energy output by the battery pack, the DC converter converts the received electric energy into DC electric energy of a preset voltage level, and transmits the DC electric energy to the DC charging pile;

[0076] The received DC power is transmitted to the target device through the DC charging pile to charge the target device.

[0077] On the basis of any optional technical solution in the embodiment of the present invention, optionally, the power output device further includes a vehicle-to-grid discharge device;

[0078] When the vehicle-to-grid discharging device receives the electric energy output by the battery pack, it converts the received electric energy into AC electric energy and transmits the AC electric energy to the target device to perform charging operations on the target device.

[0079] Based on any optional technical solution in the embodiments of the present invention, optionally, the number of battery packs is two or more, the number of discharge controllers is the same as the number of battery packs, and the discharge controllers are connected to the battery packs in a one-to-one correspondence.

[0080] Based on any optional technical solution in the embodiments of the present invention, optionally, the following further includes:

[0081] Determine the battery pack for providing electric energy from each battery pack through the battery selector, send a closing instruction to the switch components connected to each battery pack providing electric energy, and send a control output instruction to the discharge controller corresponding to the battery pack providing electric energy;

[0082] receiving a closing instruction sent by the battery selector through the switch component, and performing a corresponding closing operation based on the closing instruction to connect the battery pack with the power output device;

[0083] The discharge controller sends a discharge control instruction to the corresponding battery pack based on the received control output instruction.

[0084] On the basis of any optional technical solution in the embodiments of the present invention, optionally, the battery selector includes: a status acquisition module, which acquires the battery status of each battery pack through the status acquisition module, determines whether the battery status of each battery pack meets a preset condition, and if so, determines the battery pack that meets the preset condition as a battery pack for providing electrical energy.

[0085] Based on any optional technical solution in the embodiments of the present invention, optionally, the switch component includes a relay and / or a switching diode.

[0086] Based on any optional technical solution in the embodiments of the present invention, optionally, the following further includes:

[0087] The remaining power of the battery pack is monitored by the charging controller. When the remaining power is less than a preset threshold, a charging instruction is generated and sent to the mobile carrier to move the mobile carrier to a preset charging address.

[0088] Based on any optional technical solution in the embodiments of the present invention, optionally, the following further includes:

[0089] The battery pack is placed by a battery fixing device so that the battery pack is fixed on the mobile carrier.

[0090] The mobile power supply method provided in the embodiment of the present invention is applied to a mobile power supply system, which includes a mobile carrier, a battery pack placed on the mobile carrier, a discharge controller and a power output device; the battery pack is connected to the discharge controller and the power output device respectively, wherein the mobile power supply method includes: the mobile carrier carries the battery pack, the discharge controller and the power output device to the target address based on the received movement instruction containing the target address; the discharge controller sends a discharge control instruction to the battery pack; the battery pack outputs electric energy to the power output device based on the received discharge control instruction; the power output device transmits the electric energy output by the battery pack to the target device to charge the target device. The problem of not being able to provide charging services to the target device in a timely manner is solved, the flexibility of the charging service is improved, and the user experience is enhanced.

[0091] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A mobile power supply system, It is characterized in that include: A mobile carrier, a battery pack placed on the mobile carrier, a discharge controller and a power output device; The battery pack is connected to the discharge controller and the power output device respectively, wherein: The mobile carrier is used to carry the battery pack, the discharge controller and the power output device to move to the target address based on the received movement instruction containing the target address; The discharge controller is used to send a discharge control instruction to the battery pack; The battery pack is used to output electric energy to the power output device based on the received discharge control instruction; The power output device is used to transmit the power output by the battery pack to a target device to charge the target device; The device also includes: a switch component connected to the battery pack and the power output device respectively, and a battery selector connected to each switch component and each discharge controller, wherein the battery selector includes: a state acquisition module, connected to each of the battery packs, for acquiring the battery state of each of the battery packs, determining whether the battery state of each of the battery packs meets a preset condition, and if so, determining the battery pack that meets the preset condition as a battery pack for providing electric energy; The switch component is used to receive a closing instruction sent by the battery selector, and perform a corresponding closing operation based on the closing instruction to connect the battery pack and the power output device.

2. The system according to claim 1, It is characterized in that The power output device includes a DC charging pile, and the system further includes: a DC converter connected to the DC charging pile and the battery pack respectively; wherein, The DC converter is used to convert the received electric energy into DC electric energy of a preset voltage level when receiving the electric energy output by the battery pack, and transmit the DC electric energy to the DC charging pile; The DC charging pile is used to transmit the received DC power to the target device to perform a charging operation on the target device.

3. The system according to claim 2, It is characterized in that The power output device also includes a vehicle-to-grid discharge device; The vehicle-to-grid discharging device is used to convert the received electric energy into AC electric energy when receiving the electric energy output by the battery pack, and transmit the AC electric energy to the target device to perform charging operation on the target device.

4. The system according to claim 1, It is characterized in that The number of the battery packs is two or more, the number of the discharge controllers is the same as the number of the battery packs, and the discharge controllers are connected to the battery packs in a one-to-one correspondence.

5. The system according to claim 4, It is characterized in that The switch component is used to receive a closing instruction sent by the battery selector, and perform a corresponding closing operation based on the closing instruction to connect the battery pack and the power output device; The discharge controller is further used to send a discharge control instruction to the corresponding battery pack based on the received control output instruction.

6. The system according to claim 5, It is characterized in that The switch component includes a relay and / or a switching diode.

7. The system according to claim 1, It is characterized in that Also includes: a charging controller connected to the battery pack and the mobile carrier; The charging controller is used to monitor the remaining power value of the battery pack. When the remaining power value is less than a preset threshold, a charging instruction is generated and sent to the mobile carrier to move the mobile carrier to a preset charging address.

8. The system according to claim 1, It is characterized in that Also includes: A battery fixing device connected to the battery pack, the battery fixing device being mounted on the mobile carrier; The battery fixing device is used to place the battery pack so that the battery pack is fixed on the mobile carrier.

9. A mobile power supply method, It is characterized in that Applicable to a mobile power supply system, the mobile power supply system comprising a mobile carrier, a battery pack placed on the mobile carrier, a discharge controller, a power output device and a battery selector; The battery pack is connected to the discharge controller and the power output device respectively, wherein the mobile power supply method includes: The mobile carrier carries the battery pack, the discharge controller and the power output device to move to the target address based on the received movement instruction including the target address; Connecting to each of the battery packs via a battery selector to obtain the battery status of each of the battery packs and select a suitable battery pack; Sending a discharge control instruction to the battery pack through the discharge controller; outputting electric energy to the power output device through the battery pack based on the received discharge control instruction; The electric energy output by the battery pack is transmitted to a target device through the power output device, so as to charge the target device.

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