Charging switching matrix

Abstract

The invention relates to the technical field of electric vehicle charging, and discloses a charging switching matrix, and the method comprises a plurality of charging terminals and a plurality of power modules corresponding to the plurality of charging terminals. Each charging terminal is electrically connected with one part of the plurality of power modules to form a plurality of connecting circuits, and does not form a connecting circuit with the other part of the plurality of power modules, and each connecting circuit comprises one charging terminal and one power module; the power of each charging terminal comes from the power modules in the plurality of connecting circuits of the charging terminal; each connecting circuit is provided with a switcher; and the switcher is used for controlling the connection and disconnection of the connection circuit. In this way, the cost and complexity of the charging switching matrix are reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electric vehicle charging, and in particular to a charging switching matrix. Background Art

[0002] At present, charging piles are developing rapidly, and group-controlled charging systems can centrally solve compatibility and utilization issues, so there is a large demand in the market.

[0003] The group control charging system can automatically distribute the output power of the power module to multiple charging terminals as needed. The power switching mode of the system usually adopts full matrix switching, that is, any power module can be switched to any charging terminal. In full matrix switching, assuming that the number of power units is m, the number of buses is n, and the switching components have an intermediate state (null state), the number of switching components required is: m*n*2.

[0004] For multi-power module multi-gun charging systems, as the number of power units or charging terminals increases, the number of switching devices in the charging switching matrix increases exponentially, resulting in increased costs and system complexity.

[0005] Therefore, how to reduce the cost and complexity of the charging switching matrix has become a technical problem that needs to be solved urgently. Summary of the invention

[0006] In view of the above problems, an embodiment of the present application provides a charging switching matrix to solve the problems of the charging switching matrix being relatively complex and having relatively high cost in the prior art.

[0007] According to one aspect of an embodiment of the present application, a charging switching matrix is ​​provided, comprising: a plurality of charging terminals and a plurality of power modules corresponding to the plurality of charging terminals; each charging terminal is electrically connected to a part of the plurality of power modules to form a plurality of connection circuits, and does not form a connection circuit with another part of the plurality of power modules, each connection circuit comprising a charging terminal and a power module; the power of each charging terminal comes from a power module in the plurality of connection circuits of the charging terminal; each connection circuit is provided with a switch; the switch is used to control the on and off of the connection circuit.

[0008] Preferably, for each charging terminal: one of the multiple connection circuits formed by the charging terminal is a first connection circuit, a first switch is provided on the first connection circuit, the first switch is closed, and the first connection circuit is a path, wherein the power modules of the multiple first connection circuits formed by the multiple charging terminals are different; the charging terminal also forms multiple second connection circuits, the second connection circuits are provided with a second switch and a first switch, the first switch and the second switch are closed at the same time, and the second connection circuit is a path; the charging switching matrix also includes a controller, and the controller performs the following steps to enable the charging terminal to provide charging services: responding to a charging operation corresponding to the charging terminal; controlling the first switch to close; searching for a power module in an idle state on the multiple second connection circuits of the charging terminal; determining the second switch between the charging terminal and the found power module; and controlling the determined second switch to close.

[0009] Preferably, controlling the first switch to close includes: determining whether the power module connected to the first switch is in an idle state; if the power module is in an occupied state, controlling multiple second switches on multiple second connection circuits formed by the power module to disconnect, and controlling the first switch to close; if the power module is in an idle state, controlling the first switch to close.

[0010] Preferably, the charging switching matrix includes a charging terminal that forms a connection circuit with n power modules, where n is a positive integer; for the charging terminal that forms a connection circuit with n power modules, the charging terminal also forms a third connection circuit, on which a third switch and a first switch are provided, the first switch and the third switch are closed at the same time, and the third connection circuit is a passage; the charging terminal forms a first connection circuit, m-1 second connection circuits, and nm third connection circuits, where m is a positive integer less than n; controlling the determined second switch to close includes: obtaining a preset number of power modules corresponding to the charging terminal; determining whether the number of power modules found is less than the preset number of power modules; if the number of second switches found is less than the preset number of power modules, searching for a power module in an idle state on the third connection circuit of the charging terminal, determining a third switch between the charging terminal and the found power module, and controlling the determined second switch and the third switch to close; if the number of second switches found is not less than the preset number of power modules, controlling the determined second switch to close.

[0011] Preferably, the charging switching matrix includes a charging terminal that forms a connection circuit with p power modules; the charging terminal that forms a connection circuit with the p power modules forms a first connection circuit, q-1 second connection circuits, and pq third connection circuits, wherein p is a positive integer greater than n, and q is a positive integer less than p.

[0012] Preferably, the first switch is disposed close to the charging terminal, and the second switch is disposed close to a power module connected to the second switch.

[0013] Preferably, the charging switching matrix includes a first area and a second area, and the first area and the second area are both provided with multiple power modules; the switch connected to the power modules in the first area is arranged in the first area, and the switch connected to the power modules in the second area is arranged in the second area.

[0014] Preferably, for a charging terminal that forms a connection circuit with n power modules, if the charging terminal is arranged close to a first area, the power modules of the first connection circuit corresponding to the charging terminal and m-1 second connection circuits are all arranged in the first area, and the power module of the third connection circuit corresponding to the charging terminal is arranged in the second area; if the charging terminal is arranged close to a second area, the power modules of the first connection circuit corresponding to the charging terminal and m-1 second connection circuits are all arranged in the second area, and the power module of the third connection circuit corresponding to the charging terminal is arranged in the first area.

[0015] Preferably, the third switches of the plurality of third connection circuits formed by the plurality of charging terminals are all arranged between the first area and the second area.

[0016] Preferably, the switches and power modules in the first area and the second area are symmetrically arranged.

[0017] In the embodiment of the present application, each charging terminal does not form a connection circuit with a part of the power modules of the multiple power modules, so as to reduce the switches required to be set in the switching matrix, thereby reducing the cost and complexity of the charging switching matrix.

[0018] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0020] Figure 1 A circuit diagram of a charging switching matrix provided in an embodiment of the present application is shown;

[0021] Figure 2 A schematic diagram showing a flow chart of a control method of a controller provided in an embodiment of the present application is shown;

[0022] Figure 3A schematic flow chart of sub-steps of S120 of the control method provided in an embodiment of the present application is shown;

[0023] Figure 4 A schematic flow chart of sub-steps S150 of the control method provided in an embodiment of the present application is shown;

[0024] Figure 5 A schematic diagram of the structure of a controller provided in an embodiment of the present application is shown;

[0025] Figure 6 A schematic diagram of the structure of a charging switching matrix provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein.

[0027] Figure 1 The circuit diagram of the charging switching matrix provided in the embodiment of the present application is shown as follows: Figure 1 The charging switching matrix shown includes: multiple charging terminals and multiple power modules corresponding to the multiple charging terminals; each charging terminal is electrically connected to a part of the multiple power modules to form multiple connection circuits, and does not form a connection circuit with another part of the multiple power modules, each connection circuit includes a charging terminal and a power module; the power of each charging terminal comes from the power module in the multiple connection circuits of the charging terminal; each connection circuit is provided with a switch; the switch is used to control the connection circuit.

[0028] Preferably, for each charging terminal there is:

[0029] One of the multiple connection circuits formed by the charging terminal is a first connection circuit, on which a first switch is provided, and when the first switch is closed, the first connection circuit is a passage, wherein the power modules of the multiple first connection circuits formed by the multiple charging terminals are different; the charging terminal also forms multiple second connection circuits, on which a second switch and a first switch are provided, and when the first switch and the second switch are closed at the same time, the second connection circuit is a passage.

[0030] It should be pointed out that Figure 1 The ones marked with emphasis and the connection points at both ends of the switch are electrical connections, and the other visual intersections do not represent electrical connections.

[0031] Figure 1 "1# gun" to "12# gun" are charging terminals, where the charging terminal can be a charging gun or other power-demanding equipment; Figure 1"AU11" to "AU16" and "AU21" to "AU26" are power modules, where the power module is a power supply unit that can convert AC power from the mains into DC power, and can also be a power storage device; Figure 1 As shown, the charging terminal "1# gun" and the power modules "AU11", "AU13" and "AU14" respectively form three connection circuits, and the power module "AU11" and the charging terminals "1# gun", "5# gun" and "6# gun" respectively form three connection circuits.

[0032] Figure 1 "K1" to "K12" are the first switches of the connection circuit formed by "1# gun" to "12# gun" respectively. For charging terminal "1# gun":

[0033] "1# gun" and "AU11" form a first connection circuit, and a first switch "K1" is provided on the first connection circuit. When "K1" is closed, there is a passage between "1# gun" and "AU11", and "AU11" can supply power to "1# gun". When "K1" is disconnected, there is a circuit break between "1# gun" and "AU11", and "AU11" cannot supply power to "1# gun".

[0034] "1# gun" and "AU13" form a second connection circuit, and a second switch "KM101" is provided on the second connection circuit. When "K1" and "KM101" are closed at the same time, there is a passage between "1# gun" and "AU13", and "AU13" can supply power to "1# gun". When "K1" or "KM101" is disconnected, there is an open circuit between "1# gun" and "AU13", and "AU13" cannot supply power to "1# gun".

[0035] "1# gun" also forms a second connection circuit with "AU14", and a second switch "KM103" is provided on the second connection circuit. When "K1" and "KM103" are closed at the same time, there is a passage between "1# gun" and "AU14", and "AU14" can supply power to "1# gun". When "K1" or "KM103" is disconnected, there is an open circuit between "1# gun" and "AU14", and "AU14" cannot supply power to "1# gun".

[0036] The connection circuits formed by the remaining charging terminals "2# gun" to "12# gun" can refer to the charging terminal "1# gun" and will not be repeated here.

[0037] For the setting of the output power of the power mode of multiple charging terminals and multiple power modules, "AU11" to "AU16" and "AU21" to "AU26" can be set as power modules with a maximum power of 60kW, and "1# Gun" to "5# Gun" and "7# Gun" to "11# Gun" can be set as fast charging outputs with a maximum output power of 180kW. At this time, each charging terminal of "1# Gun" to "5# Gun" and "7# Gun" to "11# Gun" forms three connection circuits to meet the power requirements of the charging terminal output.

[0038] Furthermore, in order to adapt to the charging requirements of charging vehicles of different power sizes for the charging switching matrix, preferably, the charging switching matrix also includes a charging terminal that forms a connection circuit with p power modules, and a charging terminal that forms a connection circuit with n power modules, wherein n is a positive integer and p is a positive integer greater than n.

[0039] Preferably, for a charging terminal that forms a connection circuit with n power modules,: the charging terminal also forms a third connection circuit, the third connection circuit is provided with a third switch and a first switch, the first switch and the third switch are closed at the same time, and the third connection circuit is a passage; the charging terminal forms a first connection circuit, m-1 second connection circuits, and nm third connection circuits, m is a positive integer less than n; the charging terminal that forms a connection circuit with p power modules forms a first connection circuit, q-1 second connection circuits, and pq third connection circuits, wherein p is a positive integer greater than n, and q is a positive integer less than p.

[0040] "Gun #1" to "Gun #5" and "Gun #7" to "Gun #11" can be set to fast charging output with a maximum output power of 180kW, and "Gun #6" and "Gun #12" can be set to super charging output with a maximum output power of 480kW to adapt to the charging needs of charging vehicles of different power sizes for the charging switching matrix.

[0041] Specifically, Figure 1 As shown in the figure, take "1# gun" as an example to explain the fast charging output power:

[0042] "1# gun" and "AU11" are set to form a first connection circuit, and "1# gun" and power modules "AU13" and "AU14" form two second connection circuits; "1# gun" also forms a third connection circuit with "AU21", and the third connection circuit is provided with a third switch "KM311". When "K1" and "KM311" are closed at the same time, there is a passage between "1# gun" and "AU21", and "AU21" can supply power to "1# gun". When "K1" or "KM311" is disconnected, there is an open circuit between "1# gun" and "AU21", and "AU21" cannot supply power to "1# gun"; "AU11", "AU13", "AU14" and "AU21" can all supply power to "1# gun" to improve the scheduling efficiency of the power module resources of "1# gun" and ensure that "1# gun" can reach a fast charging output power of 180kW as much as possible.

[0043] like Figure 1 As shown in the figure, the supercharging output power is explained by taking "6# gun" as an example:

[0044] "6# gun" is set to form a first connection circuit with "AU16", and "6# gun" forms three second connection circuits with power modules "AU11", "AU12" and "AU15". "6# gun" also forms four third connection circuits with power modules "AU21", "AU22", "AU25" and "AU26" to improve the scheduling efficiency of the power module resources of "6# gun" and ensure that "6# gun" can reach a supercharging output power of 480kW as much as possible.

[0045] In the circuit setting of the charging switching matrix, preferably, the first switch is arranged close to the charging terminal, and the second switch is arranged close to the power module connected to the second switch, so as to reduce the complexity of the wiring arrangement.

[0046] For example, multiple first switches "K1" to "K12" are respectively arranged close to their charging terminals "1# gun" to "12# gun", and multiple second switches "KM101" to "KM125" are respectively arranged close to power modules "AU11" to "AU16".

[0047] Preferably, the charging switching matrix includes a first area and a second area, and the first area and the second area are both provided with multiple power modules; the switch connected to the power modules in the first area is arranged in the first area, and the switch connected to the power modules in the second area is arranged in the second area, wherein the first area and the second area can be flexibly divided according to actual needs to improve the practicality of the charging switching matrix.

[0048] Preferably, for a charging terminal that forms a connection circuit with n power modules, if the charging terminal is arranged near the first area, the power modules of the first connection circuit and m-1 second connection circuits corresponding to the charging terminal are all arranged in the first area, and the power module of the third connection circuit corresponding to the charging terminal is arranged in the second area; if the charging terminal is arranged near the second area, the power modules of the first connection circuit and m-1 second connection circuits corresponding to the charging terminal are all arranged in the second area, and the power module of the third connection circuit corresponding to the charging terminal is arranged in the first area. Preferably, the third switches of the multiple third connection circuits formed by the multiple charging terminals are all arranged between the first area and the second area.

[0049] For example, "AU11" to "AU16", "K1" to "K6" and "KM101" to "KM125" are located in the first area, "AU21" to "AU26", "K7" to "K12" and "KM201" to "KM225" are located in the second area, and the third switch "KM301" to "KM311" is located between the first area and the second area.

[0050] Furthermore, the switches and power modules in the first area and the second area are symmetrically arranged to improve the maintainability of the charging switching matrix.

[0051] In the embodiment of the present application, each charging terminal does not form a connection circuit with a part of the power modules of the multiple power modules, so as to reduce the switches required to be set in the switching matrix, thereby reducing the cost and complexity of the charging switching matrix.

[0052] The electric power required by a single vehicle is usually greater than the electric power that a single power module can provide. In order to ensure the charging power of the vehicle, it is necessary to dispatch the power of other power modules so that the charging terminal can accept the circuits of multiple power modules and output power to the vehicle, so as to reasonably distribute power and ensure the charging power.

[0053] However, the scheduling logic of the original full charging matrix is ​​based on idle resources. In the embodiment of the present application, each charging terminal does not form a connection circuit with a part of the power modules of multiple power modules, which will make the idle (power module) resources not abundant. Therefore, how to design a scheduling plan to ensure that after multiple vehicles are connected, the charging switching matrix can simultaneously meet the charging power required by multiple vehicles has become a further technical problem that needs to be solved.

[0054] Figure 2 A flow chart of a control method of a controller provided in an embodiment of the present application is shown. Figure 2As shown, the control method is executed by a controller, which may be a microcontroller, a programmable logic controller, a field programmable gate array, etc. The controller executes the control method to enable the charging terminal to provide charging services for the vehicle connected to the charging terminal:

[0055] S110, responding to a charging operation corresponding to the charging terminal.

[0056] Among them, the charging operation may include the operation of connecting the charging terminal to the vehicle, and the payment operation.

[0057] For example, the user connects the charging gun of "1# gun" to the vehicle and scans the payment code corresponding to "1# gun" to make payment, and the controller responds to the charging operation corresponding to "1# gun".

[0058] S120, controlling the first switch to close.

[0059] The controller preferentially ensures that the power of the first connection circuit of the charging terminal is transmitted to the charging terminal. For example, the controller controls the first switch "K1" corresponding to "1# gun" to close so that "AU11" supplies power to "1# gun".

[0060] In actual use, it may happen that the first switch corresponding to the charging terminal is in an occupied state. Figure 3 A flow chart showing sub-steps of S120 of the control method provided in the embodiment of the present application is shown. Figure 3 , S120, comprises the following sub-steps:

[0061] S121, determine whether the power module connected to the first switch is in an idle state; if the power module is in an occupied state, execute S122; if the power module is in an idle state, execute S123.

[0062] S122, controlling a plurality of second switches on a plurality of second connection circuits formed by the power module to be disconnected, and controlling a first switch to be closed.

[0063] For example, if the second switch "KM117" and the first switch "K5" are closed at the same time, "AU11" supplies power to "5# gun", at this time, "AU11" is in the occupied state; the controller controls the second switch "KM117" to disconnect, so that "AU11" is in the idle state; then, the controller controls the first switch "K1" corresponding to "1# gun" to close, so that "AU11" supplies power to "1# gun".

[0064] S123, controlling the first switch to close.

[0065] By controlling the multiple second switches on the multiple second connection circuits formed by the power modules to be disconnected and controlling the first switch to be closed, the power module of the first connection circuit of the charging terminal can be set from an occupied state to an idle state, and then the power module in the idle state forms a connection circuit with the charging terminal to form a scheduling scheme that prioritizes resource allocation based on the first connection circuit of the charging terminal; by forming a connection circuit between the power module in the idle state and the charging terminal and supplying power to the vehicle through the charging terminal, the charging safety of the vehicle can be fully guaranteed.

[0066] S130: Search for power modules in an idle state on multiple second connection circuits of the charging terminal.

[0067] S140, determining a second switch between the charging terminal and the found power module.

[0068] For example, for "gun #1", "AU14" is in an occupied state, while "AU13" is in an idle state, then "AU13" can be determined as the power resource scheduled for "gun #1", and the second switch "KM101" corresponding to "AU13" is controlled to be closed. Further, if "AU13" and "AU14" are in an occupied state at this time, the controller can wait until "AU13" or "AU14" is in an idle state.

[0069] S150, controlling the determined second switch to close.

[0070] If the charging switching matrix is ​​provided with a third switch, then refer to Figure 4 , Figure 4 A flow chart showing sub-steps of S150 of the control method provided in the embodiment of the present application is shown. Figure 4 , S150, comprises the following sub-steps:

[0071] S151, obtaining the preset number of power modules corresponding to the charging terminal.

[0072] For example, "Gun 1#" requires the input of 3 power modules to achieve the maximum output power of 180kW.

[0073] S152, determine whether the number of power modules found is less than the preset number of power modules; if so, execute S153; if not, execute S154.

[0074] S153, searching for a power module in an idle state on the third connection circuit of the charging terminal, determining a third switch between the charging terminal and the found power module, and controlling the determined second switch and the third switch to be closed.

[0075] S154, controlling the determined second switch to close.

[0076] The embodiment of the present application controls the first switch to close first, so as to preferentially allocate resources based on the first connection circuit of the charging terminal, and then searches for power modules in an idle state on multiple second connection circuits of the charging terminal, and forms a circuit connection between the found power modules and the charging terminal, so as to first allocate resources based on the first connection circuit and then allocate based on idle resources, thereby simplifying the complexity of resource allocation and improving the efficiency of resource scheduling.

[0077] Figure 5 FIG. 1 shows a schematic diagram of the structure of the controller provided in an embodiment of the present application. Figure 5 As shown, the controller 200 includes: a response module 210 , a first control module 220 , a search module 230 , a determination module 240 and a second control module 250 .

[0078] The response module 210 is used to respond to the charging operation corresponding to the charging terminal;

[0079] The first control module 220 is used to control the first switch to close;

[0080] The search module 230 is used to search for power modules in an idle state on multiple second connection circuits of the charging terminal;

[0081] The determination module 240 is used to determine a second switch between the charging terminal and the found power module;

[0082] The second control module 250 is used to control the determined second switch to close.

[0083] The controller of the embodiment of the present application also includes other modules for executing the steps of the above-mentioned control method embodiment, which will not be described one by one here.

[0084] Figure 6 The schematic diagram of the structure of the charging switching matrix provided by the embodiment of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the charging switching matrix.

[0085] like Figure 6 As shown, the charging switching matrix may include: a processor (processor) 302 and a memory (memory) 304 .

[0086] The memory 304 is used to store a computer program 306. The memory 304 may include a high-speed RAM memory, or may also include a non-volatile memory, such as at least one disk memory. The computer program 306 may include computer executable instructions.

[0087] The processor 302 is used to execute the computer program 306 to implement the steps in the above control method embodiment.

[0088] The processor 302 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention. The one or more processors included in the charging switching matrix may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0089] An embodiment of the present application provides a computer-readable storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the above control method embodiment are implemented.

[0090] An embodiment of the present application provides a computer program, which can be executed by a processor to implement the steps in the above control method embodiment.

[0091] An embodiment of the present application provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps in the above control method embodiment are implemented.

[0092] The algorithm or display provided here are not inherently related to any specific computer, virtual system or other equipment. Various general systems can also be used together with the teaching based on this. According to the above description, it is obvious to construct the structure required for this type of system. In addition, the present application embodiment is not directed to any specific programming language yet. It should be understood that various programming languages ​​can be utilized to realize the content of the present application described here, and the above description of specific languages ​​is to disclose the best mode of implementation of the present application.

[0093] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0094] Similarly, it should be understood that in order to streamline the present application and aid in understanding one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present application, the various features of the embodiments of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following intention: that the claimed application requires more features than those explicitly recited in each claim.

[0095] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0096] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be constructed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present application may be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be understood as limitations on the order of execution.

Claims

1. A charging switching matrix, characterized in that: The charging switching matrix comprises: a plurality of charging terminals and a plurality of power modules corresponding to the plurality of charging terminals; Each charging terminal is electrically connected to a portion of the plurality of power modules to form a plurality of connection circuits, and does not form a connection circuit with another portion of the plurality of power modules, each connection circuit comprising a charging terminal and a power module; The power of each charging terminal comes from a power module in a plurality of connection circuits of the charging terminal; Each of the connection circuits is provided with a switch; The switch is used to control the on and off of the connection circuit.

2. The charging switching matrix according to claim 1, characterized in that: For each charging terminal there is: One of the multiple connection circuits formed by the charging terminal is a first connection circuit, a first switch is provided on the first connection circuit, the first switch is closed, and the first connection circuit is a passage, wherein the power modules of the multiple first connection circuits formed by the multiple charging terminals are all different; The charging terminal further forms a plurality of second connection circuits, wherein the second connection circuits are provided with a second switch and the first switch, and the first switch and the second switch are closed at the same time, and the second connection circuits are passages; The charging switching matrix further includes a controller, which executes the following steps to enable the charging terminal to provide charging services: responding to a charging operation corresponding to the charging terminal; Controlling the first switch to close; Searching for power modules in an idle state on a plurality of second connection circuits of the charging terminal; determining a second switch between the charging terminal and the found power module; The control determines that the second switch is closed.

3. The charging switching matrix according to claim 2, characterized in that: The controlling the first switch to close comprises: Determining whether the power module connected to the first switch is in an idle state; If the power module is in an occupied state, controlling a plurality of second switches on a plurality of second connection circuits formed by the power module to be disconnected, and controlling the first switch to be closed; If the power module is in an idle state, the first switch is controlled to be closed.

4. The charging switching matrix according to claim 2, characterized in that: The charging switching matrix includes a charging terminal that forms a connection circuit with n power modules, where n is a positive integer; The charging terminals forming a connection circuit with n power modules are: The charging terminal further forms a third connection circuit, on which a third switch and the first switch are provided, and when the first switch and the third switch are closed at the same time, the third connection circuit is a passage; The charging terminal is formed with a first connection circuit, m-1 second connection circuits, and nm third connection circuits, where m is a positive integer less than n; The controlling determined second switch is closed, comprising: Obtaining the preset number of power modules corresponding to the charging terminal; Determining whether the number of found power modules is less than the preset number of power modules; If the number of the found second switches is less than the preset number of power modules, searching for a power module in an idle state on the third connection circuit of the charging terminal, determining a third switch between the charging terminal and the found power module, and controlling the determined second switch and the third switch to be closed; If the number of the found second switches is not less than the preset number of power modules, the determined second switches are controlled to be closed.

5. The charging switching matrix according to claim 4, characterized in that: The charging switching matrix includes a charging terminal forming a connection circuit with p power modules; The charging terminal forming a connection circuit with p power modules forms a first connection circuit, q-1 second connection circuits, and pq third connection circuits, wherein p is a positive integer greater than n and q is a positive integer less than p.

6. The charging switching matrix according to claim 5, characterized in that: The first switch is disposed close to the charging terminal, and the second switch is disposed close to a power module connected to the second switch.

7. The charging switching matrix according to claim 6, characterized in that: The charging switching matrix includes a first area and a second area, and the first area and the second area are both provided with a plurality of power modules; the switch connected to the power modules in the first area is arranged in the first area, and the switch connected to the power modules in the second area is arranged in the second area.

8. The charging switching matrix according to claim 7, characterized in that: The charging terminals forming a connection circuit with n power modules are: If the charging terminal is arranged close to the first area, the power modules of the first connection circuit and m-1 second connection circuits corresponding to the charging terminal are arranged in the first area, and the power module of the third connection circuit corresponding to the charging terminal is arranged in the second area; If the charging terminal is arranged close to the second area, the power modules of the first connection circuit and m-1 second connection circuits corresponding to the charging terminal are arranged in the second area, and the power module of the third connection circuit corresponding to the charging terminal is arranged in the first area.

9. The charging switching matrix according to claim 8, characterized in that: The third switches of the plurality of third connection circuits formed by the plurality of charging terminals are all arranged between the first area and the second area.

10. The charging switching matrix according to claim 8, characterized in that: The switches and power modules in the first area and the second area are symmetrically arranged.

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