A split charging pile with intelligent distribution matrix

Abstract

The present invention provides a split-type charging pile with an intelligent distribution matrix, comprising n charging modules, each with its positive and negative terminals connected to the positive and negative terminals of n charging guns via a matrix structural unit. Each matrix structural unit is formed with n rows of conductive wires arranged sequentially from top to bottom and N columns of conductive wires arranged sequentially from left to right. The n rows of conductive wires are respectively connected to the positive or negative terminals of the n charging modules, while the n columns of conductive wires are respectively connected to the positive or negative terminals of the n charging guns. If i = j, the i-th row of conductive wires and the j-th column of conductive wires are directly connected at their intersection, and the i-th charging module is directly assigned to the j-th charging gun. If i > j, the j+1-th to n-th rows of conductive wires are each connected to the j-th column of conductive wires via a DC contactor, enabling adjustable assignment of the j+1-th to n-th charging modules to the j-th charging gun. Implementing the present invention can reduce the use of DC contactors, thereby reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a split-type charging pile with an intelligent distribution matrix. Background Art

[0002] Charging stations convert AC mains electricity into high-voltage, controllable DC power, which is then connected to the vehicle's battery for charging. The device that handles this high-voltage, high-current operation is called a charging module, and it's a key component of a charging station, accounting for the majority of its cost.

[0003] Currently, integrated charging stations are popular on the market. These integrate charging modules with other peripheral components into a fully functional charging device. These charging modules are naturally distributed throughout the facility, placing high demands on the operating environment. For example, a conventional 20kW module has a conversion efficiency of approximately 96%, generating 4% of the heat, or 800 watts. Heat dissipation relies on air cooling, requiring a nominal airflow of 200 cubic meters per hour. Popular charging station configurations typically use two 120kW charging stations per cabinet. At full load, the cabinet generates 4800 watts of heat, requiring a minimum airflow of 200 x 6 = 1200 cubic meters per hour. Operating in dusty environments, these modules often draw in dust, which accumulates inside the modules, further hindering heat dissipation. Therefore, each cabinet's external air intake must be filtered, and since they operate outdoors, IP65 certification is required. With such high ventilation volumes, achieving IP65 certification means significant dust accumulation within the cabinet's filters. Addressing these issues is challenging and poses significant cost pressures.

[0004] Therefore, the split charging pile solution (referred to as the battery stack) was proposed. The split charging pile removes the modules from the cabinet and centralizes them in a main cabinet. This simplifies the terminal cabinet while centralizing all issues, achieving the following advantages:

[0005] 1. Module replacement operation: During operation, the charging module is a component that is more prone to failure. If a module in the battery stack fails (enters protection mode such as overtemperature, overvoltage, and other soft faults that cause temporary inoperability, or hardware failures that cause long-term inoperability), other idle charging modules will be automatically deployed to take over the work. This will prevent a certain gun from going out of service due to the failure of the corresponding module, minimizing the impact and providing a better charging experience.

[0006] 2. Parallel operation of modules: Charging vehicles are increasingly demanding higher currents. Configuring each charging station gun for high currents is too costly, and cost-effectiveness and return on investment are key. Therefore, the modules corresponding to a single gun are usually smaller. To ensure more efficient module operation, a new operating mode has been proposed in which multiple modules can be deployed and superimposed (connected in parallel) on the same gun. This allows idle modules to be busy, generating more benefits, better meeting the needs of charging vehicles with higher currents, and providing a better charging experience.

[0007] 3. Increase service life: Due to the characteristics of parking lots, convenient parking locations are often very busy, which causes the corresponding charging modules to frequently work at full load. In this case, the charging modules in these conveniently located charging piles will age faster. Intelligent allocation allows idle modules to be deployed to overloaded guns through a matrix to work together, reducing load pressure and increasing service life. In addition, the charging modules that are shut down first can be designed to be put into operation first, so that the modules have more cooling time, further reducing pressure.

[0008] 4. Advantages of aggregation: A large number of modules are aggregated together, which means that all problems can be solved and maintained in a unified manner. This allows the use of more efficient and advanced technologies, and of course more complex and expensive solutions or equipment, to prevent costs from getting out of control.

[0009] However, the existing split-type charging pile adopts a full matrix structure, which requires a huge amount of DC contactors, resulting in high costs and complex control. Figure 1 As shown in the figure, an 8*8 matrix is ​​used in the split-type charging pile, and the charging modules are controlled and distributed to the charging guns by connecting two single-pole contactors from K01 to K64 in parallel. A total of 128 DC contactors are used.

[0010] Therefore, it is necessary to improve the existing split-type charging piles to reduce the use of DC contactors and thus reduce costs. Summary of the Invention

[0011] The aforementioned problem to be solved by the embodiments of the present invention is to provide a split-type charging pile with an intelligent distribution matrix, which can reduce the use of DC contactors and thus reduce costs.

[0012] In order to solve the above technical problems, an embodiment of the present invention provides a split-type charging pile with an intelligent distribution matrix, comprising n charging modules, wherein the positive and negative terminals of the n charging modules are connected to the positive and negative terminals of n charging guns respectively through a matrix structure unit; n is a positive integer greater than 3;

[0013] Each matrix structure unit is formed with n rows of conductive wires arranged sequentially from top to bottom and n columns of conductive wires arranged sequentially from left to right; wherein the n rows of conductive wires are respectively connected to the positive terminals or negative terminals of the n charging modules; and the n columns of conductive wires are respectively connected to the positive electrodes or negative electrodes of the n charging guns;

[0014] If i=j, the i-th row and j-th column of conductive wires are directly connected at their intersection, directly assigning the i=j-th charging module to the j-th charging gun. If i>j, the j+1-th to i-th row of conductive wires are all connected to the j-th column of conductive wires via a DC contactor, enabling adjustable assignment of the j+1-th to n-th charging modules to the j-th charging gun. i, j=1, 2, ..., n.

[0015] The total number M1 of DC contactors in each matrix structure unit is obtained by the formula M1=(n-1)*n / 2.

[0016] If n in each matrix structure unit is 2 or more times k, each matrix structure unit is divided into n / k matrix structure sub-units in units of k, and each matrix structure sub-unit is formed with k rows of conductive lines and k columns of conductive lines; k is a positive integer greater than 1;

[0017] If i=j, the conductive line in the i-th row and the conductive line in the j-th column are directly connected at their intersection, and the i=j-th charging module is directly assigned to the j-th charging gun;

[0018] If 0<ij≤k-1, the j+1th row of conductive wires to the (INT(j / k)+1)*kth row of conductive wires are all connected to the jth column of conductive wires through a DC contactor, so that the j+1th to (INT(j / k)+1)*kth charging modules can be adjusted and allocated to the jth charging gun; INT() is a rounding function;

[0019] If ij=k, the conductive wires in the i=j+kth row are all connected to the conductive wires in the jth column through a DC contactor, so that the i=j+kth charging module can be adjusted to be allocated to the jth charging gun.

[0020] The total number M2 of DC contactors in each matrix structure unit is obtained by the formula M2=(k-1)*n / 2+nk.

[0021] Wherein, k=4 or k=8.

[0022] Wherein, the DC contactor is a single-pole switch.

[0023] The implementation of the embodiments of the present invention has the following beneficial effects:

[0024] The present invention reduces the matrix structure unit to a semi-matrix structure by directly allocating the i=jth charging module to the jth charging gun when the row and column conductive line sequence number i=j in the matrix structure unit, and by arbitrarily allocating the j+1th to Nth charging modules to the jth charging gun when all conductive lines with row conductive line sequence i greater than column conductive line sequence j in the matrix structure unit are connected to the jth column conductive line through a DC contactor. This reduces the use of DC contactors and lowers costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, other drawings obtained based on these drawings still fall within the scope of the present invention.

[0026] Figure 1 This is a schematic diagram of the 8*8 full matrix structure used in the positive terminal of a split-type charging pile in the prior art;

[0027] Figure 2 This is a structural diagram of an intelligent distribution matrix split-type charging pile provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of a matrix structure unit when n=8 in an application scenario of an intelligent distribution matrix split-type charging pile provided in an embodiment of the present invention;

[0029] Figure 4 for Figure 3 A simplified diagram of

[0030] Figure 5 This is a schematic diagram of a matrix structure unit when n=16 in an application scenario of an intelligent distribution matrix split-type charging pile provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of a matrix structure unit divided into two matrix structure sub-units when n=16 in an application scenario of an intelligent distribution matrix split-type charging pile provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of a matrix structure unit divided into four matrix structure sub-units when n=32 in an application scenario of an intelligent distribution matrix split-type charging pile provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0034] In an embodiment of the present invention, the inventor provides an intelligent distribution matrix split charging pile, including n charging modules, the positive and negative ends of the n charging modules are correspondingly connected to the positive and negative poles of n charging guns through a matrix structure unit; n is a positive integer greater than 1.

[0035] For the convenience of description, Figure 1 As shown, taking the corresponding connection of the positive terminals of n charging modules and the positive electrodes of n charging guns as an example, the matrix structure unit is described in detail as follows:

[0036] Each matrix structure unit is formed with n rows of conductive wires arranged sequentially from top to bottom and n columns of conductive wires arranged sequentially from left to right; wherein the n rows of conductive wires are respectively connected to the positive terminals of n charging modules; and the n columns of conductive wires are respectively connected to the positive terminals of n charging guns. It should be noted that from top to bottom and from left to right, the first charging module is used as a reference, with the bottom of the first charging module being downward and the right of the first charging module being right.

[0037] If i=j, the i-th row and j-th column of conductive wires are directly connected at their intersection, directly assigning the i=j-th charging module to the j-th charging gun; if i>j, the j+1-th row to the i-th row of conductive wires are all connected to the j-th column of conductive wires through a DC contactor (such as a single-pole switch or other control switch), enabling the j+1-th to n-th charging modules to be adjustable and assigned to the j-th charging gun; i, j=1, 2, ..., n.

[0038] At this time, the total number M1 of DC contactors in the matrix structure unit is calculated by the formula M1 = (n-1) * n / 2. It can be seen that the matrix structure unit is a semi-matrix structure, which reduces the number of DC contactors and reduces costs.

[0039] In one example, Figure 3 As shown, taking n = 8 as an example, the eight DC contactors, K01, K10, K19, K28, K37, K46, K55, and K64, are directly connected. This connects "module n" directly to "gun n," saving eight DC contactors. At this point, because K01, K10, and others are directly connected, the energization of K02 and K09 connects module 1 to module 2. Similarly, the energization of K03 and K17 connects module 1 to module 3.

[0040] This leads to the conclusion that Figure 3The line composed of 8 points K01, K10, K19, K28, K37, K48, K55, and K64 divides the matrix into two parts, and a half-matrix circuit is obtained. After sorting, we get Figure 4 The simplified half-matrix diagram uses a total of 56 DC contactors, compared to the 128 DC contactors in the full-matrix solution, saving 72 DC contactors, with a significant saving effect.

[0041] In the embodiment of the present invention, considering that n is large enough to cause too many contactors to be used, further simplification is required. Therefore, if n in each matrix structure unit is 2 times or more of k (such as 3, 4, ...), each matrix structure unit is divided into n / k matrix structure sub-units with k as the unit, and each matrix structure sub-unit is formed with k rows of conductive lines and k columns of conductive lines; k is a positive integer greater than 1; in one example, k = 4, k = 8, or k = 16;

[0042] If i=j, the conductive line in the i-th row and the conductive line in the j-th column are directly connected at their intersection, and the i=j-th charging module is directly assigned to the j-th charging gun;

[0043] If 0<ij≤k-1, the j+1th row of conductive wires to the (INT(j / k)+1)*kth row of conductive wires are all connected to the jth column of conductive wires through a DC contactor, so that the j+1th to (INT(j / k)+1)*kth charging modules can be adjusted and allocated to the jth charging gun; INT() is a rounding function;

[0044] If ij=k, the conductive wires in the i=j+kth row are all connected to the conductive wires in the jth column through a DC contactor, so that the i=j+kth charging module can be adjusted to be allocated to the jth charging gun.

[0045] At this time, the total number M2 of DC contactors in the matrix structure unit is calculated by the formula M2 = (k-1) * n / 2 + nk. As can be seen, the semi-matrix structure of the matrix structure unit is further divided into multiple smaller semi-matrix structures, further reducing the number of DC contactors and lowering costs.

[0046] In one example, Figure 5 As shown, taking n=16 as an example, a 16*16 half-matrix diagram of 16 modules towing 16 guns is made. A total of 240 DC contactors are used (two matrix structure units), which is too many and has limited applications.

[0047] During use, a terminal is generally equipped with two charging guns, called gun A and gun B. If the large matrix is ​​divided into two small matrices, and each gun A and gun B corresponds to a small matrix, the load of gun A is allocated by the A matrix, and the load of gun B is allocated by the B matrix. Then a DC contactor is installed between each gun A and gun B, which is called a connecting contactor. At this time, when any gun A or B starts charging and the charging module needs to be allocated, the connecting contactor is closed first, and the corresponding module of A (B) is used to work. When other modules need to be further allocated, because the connecting contactor has been closed, the corresponding charging module can be operated through the connecting contactor.

[0048] That is, Figure 6 As shown, with k=8 as a unit, n / k=2 matrix structure sub-units are divided into matrix A and matrix B. At this time, both matrix A and matrix B are formed with k=8 rows of conductive lines and k=8 columns of conductive lines.

[0049] In the A matrix, through i=j, the conductive line of the i-th row and the conductive line of the j-th column are directly connected at the intersection of the two, and the i=j-th charging module is directly assigned to the j-th charging gun, obtaining the simplified direct connection point on the hypotenuse of modules 1 to 7. According to 0<ij≤k-1, the conductive line of the j+1-th row to the (INT(j / k)+1)*k-th row are all connected to the conductive line of the j-th column through a DC contactor, so that the j+1-th to (INT(j / k)+1)*k-th charging modules can be adjusted to be assigned to the j-th charging gun, and INT(j / k)+1=0+1=1, so that modules 2 to 8 can be adjusted to be assigned to gun 1 (i.e., through Figure 6 The 7 DC contactors AK01 to AK07 on the left side of the matrix A are implemented). Similarly, modules 3 to 8 can be adjusted and assigned to gun 2, and so on, until module 8 can be adjusted and assigned to gun 7.

[0050] Similarly, in the B matrix, through i=j, the i-th row conductive line and the j-th column conductive line are directly connected at the intersection of the two, and the i=j-th charging module is directly assigned to the j-th charging gun, obtaining the simplified direct connection point on the hypotenuse of module 9 to module 16. According to 0<ij≤k-1, the j+1-th row conductive line to the (INT(j / k)+1)*k-th row conductive line are all connected to the j-th column conductive line through a DC contactor, so that the j+1-th to (INT(j / k)+1)*k-th charging modules can be adjusted to be assigned to the j-th charging gun, and INT(j / k)+1=1+1=2 is obtained, so that modules 10 to 16 can be adjusted to be assigned to gun 9 (i.e., through Figure 6 The 7 DC contactors BK01 to 07 on the left side of the B matrix are implemented). Similarly, modules 11 to 16 can be adjusted and assigned to gun 10, and so on, until module 16 can be adjusted and assigned to gun 15.

[0051] In addition, between the A matrix and the B matrix, if ij = k, then the i = j + kth row conductive wires are all connected to the jth column conductive wires through a DC contactor, so that the i = j + kth charging module can be adjusted and assigned to the jth charging gun, so that module 9 can be adjusted and assigned to gun 1, and similarly, module 10 can be adjusted and assigned to gun 2, and so on, until module 16 can be adjusted and assigned to gun 8, that is, through Figure 6 It is realized by 7 DC contactors ABK01~07 between the A and B matrices.

[0052] At this time, the total number of DC contactors M2 = (k-1)*n / 2+nk=(8-1)*16 / 2+16-8=64

[0053] exist Figure 6 In the example, assume that gun 1 starts working because guns 1 and 9 are dual guns (AB) in the same cabinet. The controller of this cabinet is programmed so that when only one gun is in use, the contactor (ABK01) is closed by default, meaning that modules 1 and 9 are operated in parallel by default. This makes it easy to call other modules because modules 2 to 8, a total of 7 modules, are managed by 7 contactors (AK01 to 07), and modules 10 to 16, a total of 7 modules, are managed by 7 contactors (BK01 to 07). This one-to-one correspondence makes operation simple.

[0054] Assumption 2: If gun 1 is charging, modules 1, 9, and 10 are called, and a total of 3 modules are working. At this time, gun 9 is started to charge, such as Figure 6 As shown, at this time, ABK01 needs to be disconnected; the control program needs to stop modules 9 and 10, and then disconnect ABK01; gun 1 needs to call modules, and only modules 2 to 8 meet the conditions;

[0055] Assumption 3: Gun 1 needs to apply for two modules, but only one module No. 6 is idle. Close the AK05 contactor, and modules 1 and 6 start working in parallel. At this time, all A matrix (modules 1 to 8) are in use. At this time, the application can be made through the B gun of gun No. 6 corresponding to module 6, that is, module No. 14. As long as gun 14 is idle, close ABK06.

[0056] Assumption 4: Gun 1 needs to apply for more modules. As shown above, modules 1, 6, and 14 are currently running. The five switches BK05, BK11, BK16, BK20, and BK23 connected to gun 14 correspond to modules 9 to 13. Modules 15 and 16 are called using KB26 and KB27.

[0057] In summary, the simplified 16-module to 16-gun solution is a solution that can realize the switching of any module to any gun in most cases. This solution uses a total of 56*2=128 DC contactors, which is relatively Figure 5The solution uses 240 DC contactors, but uses 112 fewer. The disadvantage is that the control is more complicated.

[0058] It should be noted that to simplify the control process, a table lookup method is used. All control processes can be implemented by having the program scan the table parameters according to certain rules. To achieve this goal, Tables 1 and 2 were designed. The two tables are identical, corresponding to two matrices, representing the matrix for gun A and the matrix for gun B, respectively. The first row of the table contains the gun number, the first column contains the module number, and each cell in between is filled with the corresponding switch name (in reality, this is the address number. For example, in an 8-bit microcontroller, the value can be set from 0 to 254. Using a name instead of an address number is for easier readability). The value 255 is reserved for special meanings, such as representing a direct call without any operation, which is the direct connection described above. AK01-28 represents the 28 pairs of contactors (one positive and one negative) in the half-matrix of gun A, and BK01-28 represents the 28 pairs of contactors in the half-matrix of gun B.

[0059] Table 1

[0060]

[0061] Table 2

[0062]

[0063] To make the program easier to use, the table was designed to follow this rule: a module is assigned by closing the switch in the grid corresponding to the gun number and module number. The program simply searches the module worksheet, finds the module that has been idle the longest, looks up the table, obtains the corresponding switch address, and closes the switch, assigning the idle module. Figure 6 The ABK contactor terminal cabinet in the example defaults to a closed contactor (ABK) when one gun is operating. The ABK is only disconnected when both guns are operating. The matrix control program clearly knows when a module is idle. This means a gun is idle, simply by exchanging information with the main cabinet via the terminal cabinet. This is why the eight ABK contactors are not listed in the table.

[0064] In another example, taking n=32 as an example, making a 32*32 half-matrix diagram of 32 modules dragging 32 guns is too large and has limited application.

[0065] At this time, if Figure 7 As shown, with k=8 as the unit, there are n / k=4 matrix structure sub-units. Each matrix structure sub-unit has k=8 rows and k=8 columns of conductive lines. A single matrix structure sub-unit is stacked like a playing card, connected to each other using ABK contacts.

[0066] For ease of use, Table 3 is designed. The table is arranged in a matrix with one table per layer. The structure of each layer is the same. The first row of the first layer is the gun number, and the first column is the module number. The middle is the data. Each gun has a set of data. The first and last rows of data represent the corresponding ABK. The middle 8 rows record the contactors that need to be closed when deploying a certain module to the corresponding gun. The program can easily find the corresponding contactors that need to be closed when deploying a certain module to a certain gun.

[0067] Table 3

[0068]

[0069] For example, Table 3 is an 8x8 matrix stacked with four matrices, divided into four layers corresponding to matrices 1 through 4. Excluding the row and column headers, the first layer contains 10 rows of data for guns 1 through 8. The first and last rows of data are for contactors. If no contactor is present above or below, it is replaced with 255. The middle row represents the contactor for this matrix. Each grid contains three data points. The first data point represents the port address of the contactor. External modules must borrow modules from the neighboring matrix through the contactor. Internal modules can simply close according to the corresponding parameters in the table.

[0070] For example, gun 9 data block

[0071] The first line (1,ABK01,250): The first parameter, "1," represents either Gun 1 or Module 1; the two are physically connected and indistinguishable. The second parameter, "ABK01," is the contactor. The third parameter, "250," represents a 250A rated capacity, a value the total current of borrowed modules cannot exceed. These three parameters indicate that Gun 1 is a neighboring module and can be borrowed via the ABK01 contactor whenever Gun 1 is idle. The maximum current of the borrowed module cannot exceed 250A.

[0072] Rows 2 to 9 correspond to the contactors of this matrix. To use the corresponding module, just close the corresponding contactor, as introduced earlier.

[0073] The 10th row, the last row (17, ABK09, 250), (same meaning as the parameters in the first row), indicates that module 17 is the adjacent module. To borrow, close ABK09. The maximum switch capacity (maximum allowable borrowing current) is 250A.

[0074] Example 1: Gun 1 starts charging the car. There is no module in the internal matrix that can be borrowed. Looking up Table 4, the data of Gun 1, the first row is (255, 255, 0). Nodes with a capacity of 0 are invalid and cannot be borrowed.

[0075] Example 2: The last row of data in the gun 1 data block is (9, ABK01, 250). The adjacent module is module 9, which is in idle state. Just close ABK01 and the total borrowed capacity must be within 250A.

[0076] Example 3: If the demand is not enough and you can borrow it, use gun No. 9 to check the usage of modules 10 to 16. If module No. 10 is available at this time, read the data (255, BK01, 150). The first parameter 255 means that this data is the current module data and can be used directly. Closing BK01 can borrow module 10. 150 is the current switch capacity of 150A. The working current of the called module cannot exceed 150A.

[0077] Summary of this column: All modules that can be borrowed by Gun 9 can be borrowed by Gun 1 through ABK01, limited only by the switching capacity of ABK01 250A

[0078] Example 4: Gun 1 starts charging the car. The contactors on both sides are busy. There is module 3 in the internal matrix that can be borrowed. The data of module 3 corresponding to gun 1 is obtained as (255, BK02, 150). Closing BK02 can obtain the assistance of module 3. If you want to borrow a module again, the same as above. All modules that gun 3 can borrow can be connected to gun 1 through BK02. At this time, in the data block (11, ABK03, 250) of gun 3, the adjacent gun is gun 11. If it is idle, the contactor ABK03 can be attracted to borrow module 11 from the adjacent matrix. Similarly, as long as the module connected to gun 11 is idle, it can be borrowed through gun 11. However, the initial BK02 data block shows that the switch capacity of 150A limits the current that cannot be borrowed.

[0079] The implementation of the embodiments of the present invention has the following beneficial effects:

[0080] The present invention reduces the matrix structure unit to a semi-matrix structure by directly allocating the i=jth charging module to the jth charging gun when the row and column conductive line sequence number i=j in the matrix structure unit, and by arbitrarily allocating the j+1th to Nth charging modules to the jth charging gun when all conductive lines with row conductive line sequence i greater than column conductive line sequence j in the matrix structure unit are connected to the jth column conductive line through a DC contactor. This reduces the use of DC contactors and lowers costs.

[0081] The above disclosure is only a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. An intelligent distribution matrix split charging pile, characterized in that: The invention comprises n charging modules, wherein the positive terminals and negative terminals of the n charging modules are connected to the positive and negative terminals of n charging guns respectively through a matrix structure unit; n is a positive integer greater than 3; Each matrix structure unit is formed with n rows of conductive wires arranged sequentially from top to bottom and n columns of conductive wires arranged sequentially from left to right; wherein the n rows of conductive wires are respectively connected to the positive terminals or negative terminals of the n charging modules; and the n columns of conductive wires are respectively connected to the positive electrodes or negative electrodes of the n charging guns; If i=j, the i-th row and j-th column of conductive wires are directly connected at their intersection, directly assigning the i=j-th charging module to the j-th charging gun. If i>j, the j+1-th to n-th row of conductive wires are all connected to the j-th column of conductive wires via a DC contactor, enabling adjustable assignment of the j+1-th to n-th charging modules to the j-th charging gun. i, j=1, 2, ..., n.

2. The intelligent distribution matrix split charging pile according to claim 1, characterized in that: The total number M1 of DC contactors in each matrix structure unit is obtained by the formula M1=(n-1)*n / 2.

3. The intelligent distribution matrix split charging pile according to claim 1, characterized in that: If n in each matrix structure unit is 2 times or more of k, each matrix structure unit is divided into n / k matrix structure sub-units in units of k, and each matrix structure sub-unit is formed with k rows of conductive lines and k columns of conductive lines; k is a positive integer greater than 1; If i=j, the conductive line in the i-th row and the conductive line in the j-th column are directly connected at their intersection, and the i=j-th charging module is directly assigned to the j-th charging gun; If 0<ij≤k-1, the j+1th row of conductive wires to the (INT(j / k)+1)*kth row of conductive wires are all connected to the jth column of conductive wires through a DC contactor, so that the j+1th to (INT(j / k)+1)*kth charging modules can be adjusted and allocated to the jth charging gun; INT() is a rounding function; If ij=k, the conductive wires in the i=j+kth row are all connected to the conductive wires in the jth column through a DC contactor, so that the i=j+kth charging module can be adjusted to be allocated to the jth charging gun.

4. The intelligent distribution matrix split charging pile according to claim 3, characterized in that: The total number M2 of DC contactors in each matrix structure unit is obtained by the formula M2=(k-1)*n / 2+nk.

5. The intelligent distribution matrix split charging pile according to claim 3, characterized in that: The k=4 or k=8.

6. The intelligent distribution matrix split charging pile according to claim 5, characterized in that: The DC contactor is a single-pole switch.

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