Separated power distribution system
Through the separate distribution system, the charging power and power storage modules are used to control the charging power and power storage modules in real time, which solves the problem of fixed configuration and insufficient stability of the existing distribution system, and achieves a more efficient distribution effect.
Patent Information
- Application Number
- CN202421752479.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The overall distribution system of the existing power distribution system is poor, has fixed configuration, poor flexibility, insufficient stability, and cannot maximize charging power, especially when multiple electric vehicles discharge to the power grid at the same time.
A separate distribution system is adopted, including a power grid, a distribution box, an AC-DC bidirectional converter and multiple charging terminals. The AC-DC bidirectional converter obtains the working status of each charging terminal in real time, regulates the charging power to maximize charging efficiency, and uses the power storage module to provide power when the power grid is powered off.
It improves the flexibility and stability of the power distribution system, ensures maximum charging power, and improves the overall power distribution effect of the power distribution system.
Smart Images
Figure CN222793267U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of V2X (vehicle to X, bidirectional flow of energy between electric vehicles and X), and in particular to a separated power distribution system. Background Art
[0002] V2X means the bidirectional flow of energy between electric vehicles and X, where X can be either an energy source or an electrical load, and the bidirectional energy can be either AC or DC. Taking the distribution system composed of power grid, distribution box, bidirectional charging and discharging pile, electric vehicles, etc. as an example, V2X can not only use the bidirectional charging and discharging pile to transmit the power of the power grid to the electric vehicle, but also feed back the power stored in the electric vehicle to the power grid through the bidirectional charging and discharging pile, and even use the electric vehicle as a power source and power other external devices through the bidirectional charging and discharging pile, thus realizing the bidirectional flow of energy.
[0003] In the related technology, the power distribution system is usually integrated, which has the following disadvantages: fixed configuration, complex configuration increase and decrease process, poor flexibility; although it can meet the basic peak shaving and valley filling, but when multiple electric vehicles discharge to the power grid at the same time, the stability is insufficient, the grid dispatching work of a single bidirectional charging and discharging pile is large, and there is a lack of stable deployment; the use of bidirectional charging and discharging piles has peak periods and valley periods, although it can meet the number of bidirectional charging and discharging piles used during peak periods, there will be a large number of idle bidirectional charging and discharging piles during valley periods, and the charging power of the bidirectional charging and discharging piles in operation cannot be maximized. All of the above undoubtedly reduce the overall distribution effect of the power distribution system. Utility Model Content
[0004] The present application provides a separated power distribution system, aiming to solve the problem of poor overall power distribution effect of the power distribution system in the related art.
[0005] In order to solve the above-mentioned technical problems existing in the related technology, the present application provides a separated power distribution system, which includes a power grid, a distribution box, an AC / DC bidirectional converter and multiple charging terminals, the power grid is electrically connected to the distribution box, the distribution box is electrically connected to the AC / DC bidirectional converter, and the AC / DC bidirectional converter is electrically connected to multiple charging terminals; wherein, the working mode of the separated power distribution system includes a grid-connected mode, the charging terminal is used to electrically connect to an electric vehicle, the working state of the charging terminal includes a charging state and an idle state, the charging state indicates that the charging terminal is electrically connected to an electric vehicle that is not fully charged, and the idle state indicates that the charging terminal is not electrically connected to the electric vehicle or is electrically connected to a fully charged electric vehicle. Specifically, in the grid-connected mode, when the grid is powered on, the distribution box transmits the first AC power provided by the grid to the AC-DC bidirectional converter, and the AC-DC bidirectional converter converts the first AC power into the first DC power and transmits it to each charging terminal in the charging state, and each charging terminal in the charging state charges the corresponding electric vehicle based on the first DC power; wherein, the AC-DC bidirectional converter obtains the working state of each charging terminal in real time, and adjusts the charging power of each charging terminal according to the working state of each charging terminal, so as to maximize the charging power of each charging terminal in the charging state. In the grid-connected mode, when the grid is powered on, the charging terminal transmits the second DC power stored on the corresponding electric vehicle to the AC-DC bidirectional converter, and the AC-DC bidirectional converter collects the second DC power of each electric vehicle and feeds it back to the grid through the distribution box after converting it into the second AC power.
[0006] It can be found that compared with the integrated power distribution system in the traditional solution (such as integrating the AC / DC conversion function, charging function, etc. into the bidirectional charging and discharging pile), the power distribution system of the present application is separated, the AC / DC conversion function is realized by the AC / DC bidirectional converter, and the charging function is realized by each charging terminal. Then, the configuration of the distribution box, the AC / DC bidirectional converter and the charging terminal can be adjusted separately, which not only meets the diversified needs, but also has higher flexibility. In the present application, when multiple electric vehicles discharge to the power grid at the same time, the AC / DC bidirectional converter can collect the second DC power of each electric vehicle and perform active inversion (i.e., converting the second DC power into the second AC power), which is more stable. In addition, the present application also sets two different working states (i.e., charging state and idle state) for the charging terminal. Whether it is during the peak charging period (i.e., there are more charging terminals in the charging state) or during the low charging period (i.e., there are more charging terminals in the idle state), the AC / DC bidirectional converter of the present application can obtain the working state of each charging terminal in real time, and adjust the charging power of each charging terminal according to the working state of each charging terminal, so as to maximize the charging power of each charging terminal in the charging state. It is understandable that the above-mentioned undoubtedly improves the overall power distribution effect of the power distribution system. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] In order to more clearly illustrate the technical solutions in the related technologies or the embodiments of the present application, the drawings required for use in the description of the related technologies or the embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, not all embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0008] Figure 1 A first module block diagram of a separate power distribution system provided in an embodiment of the present application;
[0009] Figure 2 A second module block diagram of the separated power distribution system provided in an embodiment of the present application;
[0010] Figure 3 A third module block diagram of the separated power distribution system provided in an embodiment of the present application;
[0011] Figure 4 This is a fourth module block diagram of the separated power distribution system provided in an embodiment of the present application. DETAILED DESCRIPTION
[0012] In order to make the purpose, technical solutions and advantages of the present application more obvious and easy to understand, the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the corresponding drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. It should be understood that the various embodiments of the present application described below are only used to explain the present application and are not used to limit the present application, that is, based on the various embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.
[0013] In the related art, the power distribution system is usually integrated, which has the following disadvantages: fixed configuration, complex process of configuration increase and decrease, and poor flexibility; although it can meet the basic peak shaving and valley filling, when multiple electric vehicles discharge to the power grid at the same time, the stability is insufficient, and the grid dispatching work of a single bidirectional charging and discharging pile is large, and there is a lack of stable deployment; the use of bidirectional charging and discharging piles has peak periods and valley periods. Although it can meet the number of bidirectional charging and discharging piles used during peak periods, a large number of idle bidirectional charging and discharging piles will appear during valley periods, and the charging power of the bidirectional charging and discharging piles in operation cannot be maximized; the above undoubtedly reduces the overall distribution effect of the power distribution system. To this end, the present application proposes a separate power distribution system in the embodiments below, which can effectively avoid the above-mentioned disadvantages in the related art.
[0014] Figure 1 It is a first module block diagram of a separated power distribution system. In some embodiments, the separated power distribution system includes a power grid 100, a distribution box 200, an AC / DC bidirectional converter 300, a plurality of charging terminals 400, and at least one power-consuming device 600 ( Figure 1 As an example only, it only shows one electrical device 600), the power grid 100 is electrically connected to the distribution box 200, the distribution box 200 is electrically connected to the AC / DC bidirectional converter 300, the AC / DC bidirectional converter 300 is electrically connected to several charging terminals 400, each charging terminal 400 is used to electrically connect the electric vehicle 500, and the AC / DC bidirectional converter 300 is also electrically connected to the electrical device 600, and the electrical device 600 may include but is not limited to household appliances such as refrigerators, air conditioners, televisions and washing machines. Specifically, there are two working modes of the separated power distribution system, which are the grid-connected mode and the off-grid mode. In the grid-connected mode, the separated power distribution system can only work when connected to the grid (that is, the grid 100 is powered on), and cannot work when off-grid (that is, the grid 100 is powered off); in the on-grid and off-grid mode, the separated power distribution system can work both when connected to the grid and when off-grid. The working states of the charging terminal 400 include two states, namely, a charging state and an idle state. The charging state indicates that the charging terminal 400 is electrically connected to an electric vehicle 500 that is not fully charged, and the idle state indicates that the charging terminal 400 is not electrically connected to the electric vehicle 500, or is electrically connected to a fully charged electric vehicle 500. In addition, it should be noted that the working mode of the separated power distribution system can be set by an electronic terminal held by a user (such as a mobile phone, a tablet computer, and a smart wearable device, etc.), and the electronic terminal can respond to the working mode setting instruction input by the user to set the working mode of the separated power distribution system according to the working mode setting instruction, so that the working mode after setting is adapted to the working mode setting instruction. It should also be noted that the charging terminal 400 of the present application is preferably a charging gun.
[0015] In the actual power distribution process, in the grid-connected mode, when the power grid 100 is powered on, the distribution box 200 can transmit the first AC power provided by the power grid 100 to the AC-DC bidirectional converter 300, and the AC-DC bidirectional converter 300 can convert the first AC power into the first DC power and transmit it to each charging terminal 400 in the charging state. Each charging terminal 400 in the charging state can charge the corresponding electric vehicle 500 based on the first DC power; or, the charging terminal 400 can transmit the second DC power stored on the corresponding electric vehicle 500 to the AC-DC bidirectional converter 300, and the AC-DC bidirectional converter 300 can collect the second DC power of each electric vehicle 500 and convert it into the second AC power, and then feed it back to the power grid 100 through the distribution box 200; or, the charging terminal 400 can transmit the second DC power of the corresponding electric vehicle 500 to the AC-DC bidirectional converter 300, and the AC-DC bidirectional converter 300 can distribute the second DC power to the power-consuming device 600, thereby realizing power supply to the power-consuming device 600. In addition, it should be noted that in the on-grid and off-grid mode, when the power grid 100 is powered on, the power distribution process of the separated power distribution system is the same as that in the on-grid mode, and this application will not go into details.
[0016] It is understandable that, as time goes by, the working status of each charging terminal 400 is not static, for example: for a charging terminal 400 electrically connected to a partially charged electric vehicle 500, when the electric vehicle 500 is fully charged, regardless of whether the electrical connection between the electric vehicle 500 and the charging terminal 400 is disconnected, the working status of the charging terminal 400 will change from a charging status to an idle status; for a charging terminal 400 not electrically connected to an electric vehicle 500, when the partially charged electric vehicle 500 is electrically connected to the charging terminal 400, the working status of the charging terminal 400 will change from an idle status to a charging status; for a charging terminal 400 electrically connected to a fully charged electric vehicle 500, when the fully charged electric vehicle 500 is replaced with a partially charged electric vehicle 500, the working status of the charging terminal 400 will also change from an idle status to a charging status. In response to this situation, the AC-DC bidirectional converter 300 of the present application can obtain the working status of each charging terminal 400 in real time, and adjust the charging power of each charging terminal 400 according to the working status of each charging terminal 400, so as to maximize the charging power of each charging terminal 400 in the charging state.
[0017] As can be seen from the above, compared with the integrated power distribution system in the traditional solution (for example, integrating the AC / DC conversion function and the charging function into the bidirectional charging and discharging pile), the power distribution system of the present application is separated, the AC / DC conversion function is realized by the AC / DC bidirectional converter 300, and the charging function is realized by each charging terminal 400, so the configuration of the distribution box 200, the AC / DC bidirectional converter 300 and the charging terminal 400 can be adjusted separately, which not only meets the diverse needs, but also has higher flexibility. In the present application, when several electric vehicles 500 discharge to the power grid 100 at the same time, the AC / DC bidirectional converter 300 can collect the second DC power of each electric vehicle 500 and perform active inversion (that is, convert the second DC power into the second AC power), which is more stable. In addition, the present application also sets two different working states (i.e., charging state and idle state) for the charging terminal 400. Whether it is during the peak charging period (i.e., more charging terminals 400 are in the charging state) or during the low charging period (i.e., more charging terminals 400 are in the idle state), the AC / DC bidirectional converter 300 of the present application can obtain the working state of each charging terminal 400 in real time, and adjust the charging power of each charging terminal 400 according to the working state of each charging terminal 400, and finally maximize the charging power of each charging terminal 400 in the charging state. What is said in this paragraph undoubtedly improves the overall power distribution effect of the power distribution system.
[0018] In addition, it should be noted that the configuration of the AC / DC bidirectional converter 300 includes the type of functional modules and the number of the same functional modules provided in the AC / DC bidirectional converter 300, the configuration of the distribution box 200 includes the interface type, the number of the same interface, the current size in the power distribution process and the type of functional modules provided in the distribution box 200, and the configuration of the charging terminal 400 includes the number of charging terminals 400 and the charging protocol of each charging terminal 400. These configurations can be adjusted according to actual needs; among them, for the charging protocol of each charging terminal 400, each charging terminal 400 can adopt the same charging protocol or different charging protocols, so as to meet the power demand of electric vehicles 500 with different interfaces.
[0019] As one example, Figure 2It is a second module block diagram of a separated power distribution system. The AC / DC bidirectional converter 300 includes a control module 310, a power supply module 320 and an AC / DC bidirectional conversion module 330. The control module 310 and the AC / DC bidirectional conversion module 330 are electrically connected to the distribution box 200, respectively. The AC / DC bidirectional conversion module 330 and the power supply module 320 are electrically connected to the control module 310, respectively. The AC / DC bidirectional conversion module 330 and the power supply module 320 are both electrically connected to a plurality of charging terminals 400. The control module 310 is the core of the AC / DC bidirectional converter 300. All operations of the AC / DC bidirectional converter 300 must be performed under the control of the control module 310. In the actual power distribution process, in the grid-connected mode, when the power grid 100 is powered on, the distribution box 200 can transmit the first AC power to the control module 310 and the AC / DC bidirectional conversion module 330, and the control module 310 can be started based on the first AC power. After the control module 310 is started, the AC / DC bidirectional conversion module 330 can be controlled to convert the first AC power into the first DC power and transmit it to each charging terminal 400 in the charging state. Each charging terminal 400 in the charging state can charge the corresponding electric vehicle 500 based on the first DC power; or, the charging terminal 400 can The second DC power of the corresponding electric vehicle 500 is transmitted to the AC / DC bidirectional conversion module 330. The AC / DC bidirectional conversion module 330 can collect the second DC power of each electric vehicle 500 under the control of the control module 310, and convert it into the second AC power, and then feed it back to the power grid 100 through the distribution box 200; or, the charging terminal 400 can transmit the second DC power of the corresponding electric vehicle 500 to the power supply module 320, and the power supply module 320 can distribute the second DC power to the power-consuming device 600 under the control of the control module 310, so as to realize the power supply to the power-consuming device 600. In addition, the control module 310 can also obtain the working status of each charging terminal 400 in real time, and control the AC / DC bidirectional conversion module 330 based on this, so as to adjust the charging power of each charging terminal 400 through the AC / DC bidirectional conversion module 330, so that the charging power of each charging terminal 400 in the charging state is maximized.
[0020] Preferably, the AC / DC bidirectional conversion module 330 includes a plurality of AC / DC bidirectional conversion units (not shown), each of which performs bidirectional AC / DC conversion (i.e., converting the first AC power into the first DC power, or converting the second DC power into the second AC power), and an AC / DC bidirectional conversion unit is electrically connected to at least one charging terminal 400, that is, an AC / DC bidirectional conversion unit can be electrically connected to one charging terminal 400 (in this form, a plurality of AC / DC bidirectional conversion units correspond to a plurality of charging terminals 400 one by one), or can be electrically connected to a plurality of charging terminals 400, which can be set according to actual needs, and this application does not make a sole limitation on this. In addition, it should be noted that the operation of each AC / DC bidirectional conversion unit is performed under the control of the control module 310, that is, the control module 310 actually adjusts the charging power of each charging terminal 400 by controlling a plurality of AC / DC bidirectional conversion units.
[0021] Further, Figure 3 It is a block diagram of the third module of the separated power distribution system, in which the distribution box 200 is provided with a distribution line 210, an electric energy storage module 220 and a charging module 230, the power grid 100 is electrically connected to the distribution line 210, the distribution line 210 is electrically connected to the charging module 230, the control module 310 and the AC / DC bidirectional conversion module 330, the charging module 230 is electrically connected to the electric energy storage module 220, and the electric energy storage module 220 is electrically connected to the control module 310. Specifically, the working state of the electric energy storage module 220 includes a start state and a stop state, and the electric energy storage module 220 can only transmit its own stored electric energy to the outside in the start state, and in the stop state, the electric energy storage module 220 will stop transmitting its own stored electric energy to the outside. Preferably, the electric energy storage module 220 uses a battery, such as a lead-acid battery, a lithium-ion battery, a nickel-metal hydride battery, etc. The electric energy storage module 220 may include a single battery or a battery pack composed of several batteries, which is not limited in the present application.
[0022] In the actual power distribution process, whether in the grid-connected mode or in the off-grid mode, when the grid 100 is powered on, the distribution line 210 can transmit the first AC power provided by the grid 100 to the charging module 230, the control module 310 and the AC / DC bidirectional conversion module 330. The control module 310 can start based on the first AC power and control the operation of the AC / DC bidirectional conversion module 330 or the power supply module 320. The charging module 230 can float charge the energy storage module 220 based on the first AC power to ensure that there is enough electrical energy stored in the energy storage module 220. The floating charge can ensure that the energy storage module 220 is in a good health state and can increase the service life of the energy storage module 220. In the on-grid and off-grid mode, when the grid 100 is powered off, the control module 310 can The power storage module 220 is controlled to enter a startup state, so that the power storage module 220 transmits its own stored power to the control module 310. The control module 310 can be started based on the power stored in the power storage module 220, and the power supply module 320 is controlled to distribute the second DC power to the power-consuming equipment 600 to realize power supply to the power-consuming equipment 600; in the on-grid and off-grid mode, when the power grid 100 changes from power off to power on, the control module 310 can control the power storage module 220 to enter a shutdown state, so that the power storage module 220 stops transmitting its own stored power to the control module 310, but the distribution box 200 will transmit the first AC power to the control module 310, so that the control module 310 starts based on the first AC power and controls the operation of the AC / DC bidirectional conversion module 330 or the power supply module 320.
[0023] It is understandable that when the power grid 100 is cut off, the power grid 100 cannot provide the first AC power to the control module 310, that is, the control module 310 cannot be started based on the first AC power, and cannot control the power supply module 320 to distribute the second DC power to the power-consuming device 600, thereby limiting the discharge function of the electric vehicle 500 to the power-consuming device 600 when off-grid. In this regard, in the present application, when the power grid 100 is powered off, although the power grid 100 cannot supply power to the control module 310 to start the control module 310, the power storage module 220 in the distribution box 200 can still supply power to the control module 310, so that the control module 310 can still start normally when off-grid. In this way, the control module 310 can control the power supply module 320 to transmit the second DC power stored in the electric vehicle 500 to the power-consuming equipment 600, thereby realizing the power supply to the power-consuming equipment 600 when off-grid, and further ensuring the discharge function of the electric vehicle 500 to the power-consuming equipment 600 when off-grid, so that the second DC power stored in the electric vehicle 500 can be fully utilized when off-grid.
[0024] As another example, Figure 4This is the fourth module block diagram of the separated power distribution system. Compared with the previous embodiment, the present embodiment has a different way of controlling whether the power storage module 220 and the control module 310 are electrically connected. Specifically, in the present embodiment, in addition to the power distribution line 210, the power storage module 220 and the charging module 230, the distribution box 200 is also provided with a switch module 240. The power storage module 220 is electrically connected to the control module 310 through the switch module 240. The working state of the switch module 240 includes an on state and an off state. The switch module 240 can only connect the power storage module 220 and the control module 310 in the on state, and when the switch module 240 is in the off state, the electrical connection between the power storage module 220 and the control module 310 will be cut off. Based on this, in the actual power distribution process, in the on-grid and off-grid mode, when the power grid 100 is powered off, the control module 310 can control the switch module 240 to enter the on state to connect the power storage module 220 and the control module 310, and the power storage module 220 can transmit the electric energy stored in itself to the control module 310. The control module 310 can be started based on the electric energy stored in the power storage module 220, and control the power supply module 320 to distribute the second DC power to the power-consuming device 600, thereby realizing the power supply to the power-consuming device 600 when off-grid; In the on-grid and off-grid mode, when the power grid 100 changes from being powered on to being powered on, the control module 310 can control the switch module 240 to enter the disconnected state to cut off the electrical connection between the energy storage module 220 and the control module 310, so that the energy storage module 220 stops transmitting its own stored electric energy to the control module 310, but the distribution box 200 will transmit the first AC power to the control module 310. The control module 310 can start based on the first AC power and control the operation of the AC / DC bidirectional conversion module 330 or the power supply module 320.
[0025] The above embodiments are only preferred implementations of the present application, and are not the only limitations on the contents related to the separated power distribution system; in this regard, those skilled in the art can flexibly set them according to the actual application scenarios based on the above embodiments. It can be understood that through the implementation of the above embodiments of the present application, a separated power distribution system is obtained. Compared with the integrated power distribution system in the traditional solution (such as integrating the AC / DC conversion function and the charging function into the bidirectional charging and discharging pile), the AC / DC conversion function is implemented by the AC / DC bidirectional converter 300, and the charging function is implemented by each charging terminal 400. Then, the configurations of the distribution box 200, the AC / DC bidirectional converter 300 and the charging terminal 400 can be adjusted separately, which not only meets the diverse needs but also has higher flexibility. In the present application, when several electric vehicles 500 discharge to the power grid 100 at the same time, the AC / DC bidirectional converter 300 can collect the various The second DC power of the electric vehicle 500 is actively inverted (i.e., the second DC power is converted into the second AC power), which is more stable; in addition, the present application also sets two working states (i.e., charging state and idle state) for the charging terminal 400. Whether it is during the peak charging period (i.e., there are more charging terminals 400 in the charging state) or during the low charging period (i.e., there are more charging terminals 400 in the idle state), the AC / DC bidirectional converter 300 of the present application can obtain the working state of each charging terminal 400 in real time, and adjust the charging power of each charging terminal 400 based on this, and finally maximize the charging power of each charging terminal 400 in the charging state. In view of this, the present application can effectively improve the overall power distribution effect of the power distribution system.
[0026] It should be noted that the several embodiments shown in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can refer to each other. It should also be noted that in the text description of the present application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is such an actual relationship or order between these entities or operations. Further, the terms "include", "comprise" or any other corresponding variants are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only these elements, but also other elements that are not explicitly listed, or may also include elements inherent to such process, method, article or equipment; and, in the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.
[0027] In addition, by implementing the several embodiments shown above in the present application, professionals and technicians in this field can implement or use the present application. For the several embodiments shown above in the present application, various modifications will be obvious to professionals and technicians in this field, and the general principles defined in the present application can be implemented in other embodiments not shown without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the several embodiments shown above, but will comply with the widest range consistent with the principles and novel features disclosed in the present application.
Claims
1. A separate power distribution system, characterized in that: The system comprises a power grid, a distribution box, an AC / DC bidirectional converter and a plurality of charging terminals, wherein the power grid is electrically connected to the distribution box, the distribution box is electrically connected to the AC / DC bidirectional converter, and the AC / DC bidirectional converter is electrically connected to the plurality of charging terminals; wherein the working mode of the separated power distribution system comprises a grid-connected mode, the charging terminal is used to electrically connect to an electric vehicle, the working state of the charging terminal comprises a charging state and an idle state, the charging state indicates that the charging terminal is electrically connected to the electric vehicle that is not fully charged, and the idle state indicates that the charging terminal is not electrically connected to the electric vehicle or is electrically connected to the fully charged electric vehicle: In the grid-connected mode, when the grid is powered on, the distribution box transmits the first AC power provided by the grid to the AC-DC bidirectional converter, and the AC-DC bidirectional converter converts the first AC power into the first DC power and transmits it to each of the charging terminals in the charging state, and each of the charging terminals in the charging state charges the corresponding electric vehicle based on the first DC power; wherein the AC-DC bidirectional converter obtains the working state of each of the charging terminals in real time, and adjusts the charging power of each of the charging terminals according to the working state of each of the charging terminals, so as to maximize the charging power of each of the charging terminals in the charging state; In the grid-connected mode, when the grid is powered on, the charging terminal transmits the second DC power stored in the corresponding electric vehicle to the AC-DC bidirectional converter, and the AC-DC bidirectional converter collects the second DC power of each electric vehicle and feeds it back to the grid through the distribution box after converting it into second AC power.
2. The separated power distribution system according to claim 1, characterized in that: It also includes at least one electrical device, which is electrically connected to the AC-DC bidirectional converter; in the grid-connected mode, when the grid is powered on, the charging terminal transmits the second DC power corresponding to the electric vehicle to the AC-DC bidirectional converter, and the AC-DC bidirectional converter distributes the second DC power to the electrical device to power the electrical device.
3. The separated power distribution system according to claim 2, characterized in that: The AC / DC bidirectional converter includes a control module, a power supply module and an AC / DC bidirectional conversion module, wherein the control module and the AC / DC bidirectional conversion module are electrically connected to the distribution box, the AC / DC bidirectional conversion module and the power supply module are electrically connected to the control module, and the AC / DC bidirectional conversion module and the power supply module are electrically connected to the plurality of charging terminals; In the grid-connected mode, when the grid is powered on, the distribution box transmits the first AC power to the control module and the AC / DC bidirectional conversion module, the control module is started based on the first AC power, the control module controls the AC / DC bidirectional conversion module to convert the first AC power into the first DC power, and transmits it to each of the charging terminals in the charging state, and each of the charging terminals in the charging state charges the corresponding electric vehicle based on the first DC power; wherein the control module obtains the working state of each of the charging terminals in real time, and controls the AC / DC bidirectional conversion module according to the working state of each of the charging terminals, so as to regulate the charging power of each of the charging terminals through the AC / DC bidirectional conversion module, so that the charging power of each of the charging terminals in the charging state is maximized; In the grid-connected mode, when the grid is powered on, the charging terminal transmits the second DC power of the corresponding electric vehicle to the AC / DC bidirectional conversion module, and the AC / DC bidirectional conversion module collects the second DC power of each electric vehicle under the control of the control module, and after converting it into the second AC power, feeds it back to the grid through the distribution box; In the grid-connected mode, when the grid is powered on, the charging terminal transmits the second DC power corresponding to the electric vehicle to the power supply module, and the power supply module distributes the second DC power to the power-consuming equipment under the control of the control module to power the power-consuming equipment.
4. The separated power distribution system according to claim 3, characterized in that: The AC / DC bidirectional conversion module includes a plurality of AC / DC bidirectional conversion units, and one of the AC / DC bidirectional conversion units is electrically connected to at least one of the charging terminals.
5. The separated power distribution system according to claim 3, characterized in that: The working mode of the separated power distribution system also includes an on-grid and off-grid mode. In the on-grid and off-grid mode, the separated power distribution system works when the power grid is powered on or when the power grid is powered off; an energy storage module is arranged in the distribution box, and the energy storage module is electrically connected to the control module. The working state of the energy storage module includes a start state and a stop state; In the on-grid and off-grid mode, when the power grid is powered off, the control module controls the electric energy storage module to enter the startup state, the electric energy storage module transmits the electric energy stored in itself to the control module, the control module starts based on the electric energy stored in the electric energy storage module, and controls the power supply module to distribute the second DC electric energy to the electric device to power the electric device; In the on-grid and off-grid mode, when the power grid changes from being powered on to being powered on, the control module controls the electric energy storage module to enter the shutdown state, the electric energy storage module stops transmitting its own stored electric energy to the control module, the distribution box transmits the first AC electric energy to the control module, and the control module starts based on the first AC electric energy.
6. The separated power distribution system according to claim 3, characterized in that: The working mode of the separated power distribution system also includes an on-grid and off-grid mode. In the on-grid and off-grid mode, the separated power distribution system works when the power grid is powered on or when the power grid is powered off. An energy storage module and a switch module are arranged in the distribution box. The energy storage module is electrically connected to the control module through the switch module. The working state of the switch module includes an on state and an off state. In the on-grid and off-grid mode, when the power grid is powered off, the control module controls the switch module to enter the on state to connect the electric energy storage module and the control module, the electric energy storage module transmits the electric energy stored in itself to the control module, the control module starts based on the electric energy stored in the electric energy storage module, and controls the power supply module to distribute the second DC electric energy to the electric device, so as to realize power supply to the electric device; In the on-grid and off-grid mode, when the power grid changes from being powered on to being powered on, the control module controls the switch module to enter the disconnected state to cut off the electrical connection between the energy storage module and the control module, so that the energy storage module stops transmitting its stored electric energy to the control module, and the distribution box transmits the first AC power to the control module, and the control module starts based on the first AC power.
7. The separated power distribution system according to claim 5 or 6, characterized in that: A charging module is also provided in the distribution box, and the energy storage module is electrically connected to the power grid through the charging module; in the grid-connected mode and the off-grid mode, when the power grid is powered on, the charging module performs float charging on the energy storage module based on the first AC power provided by the power grid.
8. The separated power distribution system according to claim 5 or 6, characterized in that: The electric energy storage module includes a single storage battery or a storage battery pack composed of a plurality of the storage batteries.
9. The separated power distribution system according to claim 5 or 6, characterized in that: It also includes an electronic terminal held by a user, which is used to respond to an operating mode setting instruction input by the user to set the operating mode of the separated power distribution system according to the operating mode setting instruction.
10. The separated power distribution system according to claim 1, characterized in that: The charging protocols used by the multiple charging terminals are different.