A charging stack power distribution system and method based on matrix control

Abstract

The present invention provides a charging pile power distribution system and method based on matrix control, in which a cascade contactor is set in the switching matrix module, so that multiple charging pile bodies can be separated and connected by opening and closing the cascade contactor, thereby realizing the sharing of power modules between adjacent charging pile bodies, thereby avoiding the situation that more charging terminals and power modules are integrated on the same charging pile when the scale of the charging station is expanded, that is, the newly added charging pile body can realize power sharing with the original charging pile body. At the same time, by distributing the charging terminals and power modules to multiple charging pile bodies and connecting them through cascade contactors, not only the number of contactors used in the switching matrix module is effectively reduced, saving the construction cost of charging facilities, but also each charging terminal can be provided with a higher charging power, meeting the charging needs of different vehicles, and realizing the reasonable distribution and utilization of charging power.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a charging pile power distribution system and method based on matrix control. Background Art

[0002] As the automobile industry has developed to this day, its functionalization trend has become increasingly prominent, among which new energy vehicles will usher in rapid development. As the main medium for energy replenishment of new energy vehicles, the demand pressure on the charging side of the charging system has increased sharply, and the construction and operation of charging infrastructure has become an urgent problem to be solved. On the one hand, electric vehicles of different brands and models have different peak power requirements for electricity consumption, and the same vehicle has different power requirements at different stages of charging. On the other hand, the probability that the power of all charging terminals in the charging field is at peak state is also very small, and the total power that the charging field can provide is also affected by the regional power grid and time period. Therefore, if each charging terminal is built according to the standard of providing the highest peak value at the same time, it will not only increase the construction cost, but also cause waste of power resources. The technology of using power stacks can solve this problem very well. Compared with other charging systems, power stacks have the advantages of high equipment utilization, small footprint, high safety of charging terminals, and high protection level.

[0003] However, most of the current power distribution systems of charging piles use a large number of contactors to form an N-input and M-output switching matrix (such as Figure 1 and Figure 2 As shown). Among them, N in means there are N power modules, and M out means there are M charging terminals. When the charging stack is working, the PCU (Power Control Unit) power controller obtains the power demand of the vehicle through the charging terminal, and then controls the switching matrix to allocate power modules to each vehicle. However, this switching matrix has the following disadvantages: 1. High cost: The switching matrix requires a large number of contactors, and the number of contactors increases geometrically with the increase in the number of power modules and charging terminals. 2. Complex wiring: The more contactors there are, the more complex its wiring structure is. 3. Difficult expansion: If the charging station that has been put into use wants to increase the number of charging terminals, it can only increase the number of charging stacks, but cannot add charging terminals to the original charging stacks; the corresponding newly added power modules cannot be shared with the original charging terminals. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a charging stack power distribution system and method based on matrix control, which can reduce the number of contactors used while achieving connection switching between more power modules and charging terminals, and realize power sharing between the newly added power modules and the original charging terminals.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A charging stack power distribution system based on matrix control, comprising a plurality of charging stack bodies and charging terminals; each of the charging stack bodies comprises a power controller, a switching matrix module and a plurality of power modules; the switching matrix module comprises a DC contactor and a cascade contactor;

[0007] In the charging stack body, the power controller is respectively connected to the DC contactor, the cascade contactor, the multiple power modules and the multiple charging terminals corresponding to the charging stack body; the multiple power modules are connected to the multiple charging terminals through the DC contactor; and the multiple charging terminals are connected to the power modules of adjacent charging stack bodies through the cascade contactor.

[0008] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0009] A charging stack power distribution method based on matrix control, comprising:

[0010] After detecting that a vehicle is connected to the charging terminal, the charging power of the vehicle and the idle power of the charging stack body corresponding to the charging terminal are obtained through the power controller;

[0011] Determine whether the idle power of the charging stack body is greater than or equal to the charging power, and if so, close the DC contactor through the power controller to allocate the power module in the charging stack body to the charging terminal to charge the vehicle;

[0012] Otherwise, the power controller closes the cascade contactor to distribute the power modules in the adjacent charging stack bodies to the charging terminal to charge the vehicle.

[0013] The beneficial effect of the present invention is that: a cascade contactor is set in the switching matrix module, so that multiple charging pile bodies can be separated and connected by opening and closing the cascade contactor, thereby realizing the sharing of power modules between adjacent charging pile bodies, and in this way, when expanding the scale of the charging station, more charging terminals and power modules are integrated on the same charging pile, that is, the newly added charging pile body can share power with the original charging pile body. At the same time, by distributing the charging terminals and power modules to multiple charging pile bodies and connecting them through cascade contactors, not only the number of contactors used in the switching matrix module is effectively reduced, saving the construction cost of charging facilities, but also each charging terminal can be provided with a higher charging power, meet the charging needs of different vehicles, and realize the reasonable allocation and utilization of charging power. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a structural schematic diagram of a charging stack power distribution system in the prior art;

[0015] Figure 2 The electrical schematic diagram of the charging stack switching matrix module in the prior art;

[0016] Figure 3 A schematic diagram of the structure of a charging stack power distribution system based on matrix control provided in an embodiment of the present invention;

[0017] Figure 4 An electrical schematic diagram of a switching matrix module in a charging stack power distribution system provided in an embodiment of the present invention;

[0018] Figure 5 An electrical schematic diagram of a switching matrix module in a charging stack power distribution system provided in an embodiment of the present invention;

[0019] Figure 6 A flowchart of the steps of a charging stack power distribution method based on matrix control provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0021] Please refer to Figure 3 The embodiment of the present invention provides a charging stack power distribution system based on matrix control, comprising a plurality of charging stack bodies and charging terminals; each of the charging stack bodies comprises a power controller, a switching matrix module and a plurality of power modules; the switching matrix module comprises a DC contactor and a cascade contactor;

[0022] In the charging stack body, the power controller is respectively connected to the DC contactor, the cascade contactor, the multiple power modules and the multiple charging terminals corresponding to the charging stack body; the multiple power modules are connected to the multiple charging terminals through the DC contactor; and the multiple charging terminals are connected to the power modules of adjacent charging stack bodies through the cascade contactor.

[0023] From the above description, it can be seen that the beneficial effect of the present invention is that: a cascade contactor is set in the switching matrix module, so that multiple charging pile bodies can be separated and connected by opening and closing the cascade contactor, thereby realizing the sharing of power modules between adjacent charging pile bodies, and in this way, when expanding the scale of the charging station, more charging terminals and power modules are integrated on the same charging pile, that is, the newly added charging pile body can share power with the original charging pile body. At the same time, by distributing the charging terminals and power modules to multiple charging pile bodies and connecting them through cascade contactors, not only the number of contactors used in the switching matrix module is effectively reduced, saving the construction cost of charging facilities, but also each charging terminal can be provided with a higher charging power, meet the charging needs of different vehicles, and realize the reasonable allocation and utilization of charging power.

[0024] Furthermore, the switching matrix module also includes a cascade line, a power line and a charging line;

[0025] The charging terminal of the charging stack body is connected to the power module of the adjacent charging stack body through the charging line, the cascade contactor and the cascade line;

[0026] The multiple power modules of the charging stack body are connected to the charging terminal of the charging stack body through the power line, the DC contactor and the charging line;

[0027] The multiple power modules of the charging stack body are connected to the charging terminals of the adjacent charging stack bodies through the power lines, cascade contactors and cascade lines.

[0028] From the above description, it can be seen that the cascade line is used to form a connection channel between adjacent charging stack bodies; the charging line is used to distribute charging power to the charging terminal. Since a cascade contactor is provided in the switching matrix module, the charging terminal can be connected to the power module of the adjacent charging stack body. Therefore, the charging line not only needs to be connected to the power line of the current charging stack body, but also needs to be connected to the cascade line through the cascade contactor. When the idle power of the current charging stack body is insufficient to meet the charging needs of the vehicle, the power modules of the adjacent charging stack bodies are connected through the cascade contactor and the cascade line to realize power sharing between multiple charging stack bodies.

[0029] Further, the cascade contactor includes a first cascade contactor;

[0030] One end of the charging line is connected to the charging terminal of the charging stack body, the other end of the charging line is connected to one end of the cascade line through the first cascade contactor, and the other end of the cascade line is connected to the power module of the adjacent charging stack body;

[0031] One end of the power line is connected to the power module of the charging stack body, and the other end of the power line is connected to the charging terminal of the charging stack body through the DC contactor.

[0032] From the above description, it can be seen that the DC contactor is used to distribute the power module of the current charging stack body to the corresponding charging terminal through the corresponding power line and the charging line; the first cascade contactor is used to distribute the power module of the adjacent charging stack body to the charging terminal of the current charging stack body through the corresponding power line and the cascade line when the idle power of the current charging stack body is insufficient; so that the charging terminal of the current charging stack body can be connected to the power module of the adjacent charging stack body, thereby realizing power sharing.

[0033] Further, the cascade contactor includes a second cascade contactor;

[0034] One end of the power line is connected to the power module of the charging stack body, the other end of the power line is connected to one end of the cascade line through the second cascade contactor, and the other end of the cascade line is connected to the charging terminal of the adjacent charging stack body.

[0035] From the above description, it can be seen that the second cascade contactor is used to connect the power module of the current charging stack body to the charging terminal of the adjacent charging stack body through the corresponding charging line and the cascade line when the idle power of the adjacent charging stack body is insufficient; so that the charging terminal of the adjacent charging stack body can be connected to the power module of the current charging stack body, realizing "hand-in-hand" cascading, that is, one charging stack body can be cascaded to multiple adjacent charging stack bodies at the same time, and the power distribution flexibility is higher.

[0036] Furthermore, the power controllers between the multiple charging stack bodies are connected via Ethernet, RS485 communication line or CAN communication line.

[0037] It can be seen from the above description that the power controllers between the multiple charging stack bodies cascaded together communicate with each other through Ethernet, RS485 communication line or CAN communication line to achieve power distribution coordination.

[0038] Furthermore, the number of the charging terminals is less than or equal to the number of the power modules.

[0039] It can be seen from the above description that one power module cannot provide power to multiple charging terminals at the same time. Therefore, the number of power modules should meet the minimum requirement of the number of charging terminals.

[0040] Please refer to Figure 6 Another embodiment of the present invention provides a charging stack power distribution method based on matrix control, comprising:

[0041] After detecting that a vehicle is connected to the charging terminal, the charging power of the vehicle and the idle power of the charging stack body corresponding to the charging terminal are obtained through the power controller;

[0042] Determine whether the idle power of the charging stack body is greater than or equal to the charging power, and if so, close the DC contactor through the power controller to allocate the power module in the charging stack body to the charging terminal to charge the vehicle;

[0043] Otherwise, the power controller closes the cascade contactor to distribute the power modules in the adjacent charging stack bodies to the charging terminal to charge the vehicle.

[0044] From the above description, it can be seen that the beneficial effect of the present invention is that: by obtaining the charging power of the vehicle and the idle power of the current charging pile body, it is judged whether the current charging pile body can provide sufficient charging power for the vehicle; when the charging power of the current charging pile body is sufficient, the power module of the current charging pile body is allocated to the charging terminal through the switching scheduling of the DC contactor, without closing the cascade contactor; and when the charging power of the current charging pile body is insufficient, when the adjacent charging pile body is idle, the power module can be shared from the adjacent charging pile body to the charging terminal of the current charging pile body through the switching scheduling of the cascade contactor. In this way, when the scale of the charging station is expanded, more charging terminals and power modules are integrated on the same charging pile, that is, the newly added charging pile body can share power with the original charging pile body. At the same time, by distributing the charging terminal and the power module to multiple charging pile bodies and connecting them through the cascade contactor, not only the number of contactors used in the switching matrix module is effectively reduced, the construction cost of the charging facilities is saved, but also a higher charging power can be provided for each charging terminal, the charging needs of different vehicles are met, and the reasonable allocation and utilization of the charging power are realized.

[0045] Further, the closing of the DC contactor by the power controller to distribute the power module of the charging stack body to the charging terminal to charge the vehicle includes:

[0046] The power controller obtains multiple idle power modules in the charging stack body, closes the DC contactors corresponding to the multiple idle power modules and the charging terminal, and distributes the multiple idle power modules to the charging terminal to charge the vehicle.

[0047] It can be seen from the above description that, when the current charging stack body meets the charging demand of the vehicle, multiple idle power modules in the charging stack body can be obtained to meet the maximum charging power of the vehicle.

[0048] Further, the closing of the cascade contactor by the power controller to distribute the power modules in the adjacent charging stack bodies to the charging terminal to charge the vehicle includes:

[0049] The power controller closes the cascade contactor corresponding to the charging terminal, obtains adjacent idle power modules in the adjacent charging stack body, closes the cascade contactors corresponding to the adjacent idle power modules, and allocates the adjacent idle power modules to the charging terminal to charge the vehicle.

[0050] From the above description, it can be seen that when the current charging stack body cannot meet the vehicle charging needs, there may be a problem of insufficient idle power of the current charging stack body. At this time, the idle power modules of adjacent charging stack bodies can be allocated to the charging terminal by closing the cascade contactor, thereby realizing power sharing among multiple charging stack bodies and effectively improving the utilization rate of the charging power.

[0051] Furthermore, before detecting that a vehicle is connected to the charging terminal, the method further includes:

[0052] The power controller is used to determine whether each charging terminal in all charging stack bodies has a vehicle connected. If so, an idle power module in each charging stack body is obtained, and a DC contactor corresponding to an idle power module and a charging terminal is closed, and the idle power module is allocated to one charging terminal to charge the vehicle.

[0053] From the above description, it can be seen that when the current charging stack body cannot meet the vehicle's charging needs, and each charging terminal of the adjacent charging stack body has charging needs, each charging terminal can only be allocated one power module to meet the vehicle's minimum charging needs and avoid wasting charging terminal resources.

[0054] The embodiment of the present invention provides a charging stack power distribution system and method based on matrix control, which can be used in new energy vehicle charging fields. While reducing the number of contactors used and reducing construction costs, the number of charging stacks can be flexibly set to quickly realize power sharing between the newly added power module and the original charging terminal. The following is an explanation through a specific embodiment:

[0055] Please refer to Figure 3 to Figure 4 , Embodiment 1 of the present invention:

[0056] A charging stack power distribution system based on matrix control, comprising a plurality of charging stack bodies and charging terminals; each of the charging stack bodies comprises a power controller, a switching matrix module and a plurality of power modules; the switching matrix module comprises a DC contactor and a cascade contactor;

[0057] In the charging stack body, the power controller is respectively connected to the DC contactor, the cascade contactor, the multiple power modules and the multiple charging terminals corresponding to the charging stack body; the multiple power modules are connected to the multiple charging terminals through the DC contactor; and the multiple charging terminals are connected to the power modules of adjacent charging stack bodies through the cascade contactor.

[0058] It should be noted that Figure 3 In the embodiment, the PCU (Power Control Unit) power controller is the power controller; the power module is also connected to an external input power supply.

[0059] Specifically, the number of the charging terminals is less than or equal to the number of the power modules, so as to ensure that each charging terminal can be allocated to at least one power module for power supply.

[0060] Specifically, the switching matrix module also includes a cascade line, a power line and a charging line;

[0061] The charging terminal of the charging stack body is connected to the power module of the adjacent charging stack body through the charging line, the cascade contactor and the cascade line;

[0062] The multiple power modules of the charging stack body are connected to the charging terminal of the charging stack body through the power line, the DC contactor and the charging line;

[0063] The multiple power modules of the charging stack body are connected to the charging terminals of the adjacent charging stack bodies through the power lines, cascade contactors and cascade lines.

[0064] Specifically, the cascade contactor includes a first cascade contactor;

[0065] One end of the charging line is connected to the charging terminal of the charging stack body, the other end of the charging line is connected to one end of the cascade line through the first cascade contactor, and the other end of the cascade line is connected to the power module of the adjacent charging stack body;

[0066] One end of the power line is connected to the power module of the charging stack body, and the other end of the power line is connected to the charging terminal of the charging stack body through the DC contactor.

[0067] Specifically, the cascade contactor includes a second cascade contactor;

[0068] One end of the power line is connected to the power module of the charging stack body, the other end of the power line is connected to one end of the cascade line through the second cascade contactor, and the other end of the cascade line is connected to the charging terminal of the adjacent charging stack body.

[0069] It should be noted that each power module can only be connected to one charging terminal at a time and cannot be connected to multiple charging terminals at the same time.

[0070] Specifically, the power controllers between the multiple charging stack bodies are connected via Ethernet, RS485 communication line or CAN communication line.

[0071] It should be noted that the DC contactor includes a positive DC contactor and a negative DC contactor, the two ends of the positive DC contactor are respectively connected to the charging terminal and the positive pole of the power module, and the two ends of the negative DC contactor are respectively connected to the charging terminal and the negative pole of the power module; the cascade contactor includes a positive cascade contactor and a negative cascade contactor, the two ends of the positive cascade contactor are respectively connected to the charging terminal and the positive pole of the power module, and the two ends of the negative cascade contactor are respectively connected to the charging terminal and the negative pole of the power module.

[0072] In this embodiment, refer to Figure 4 As shown, the charging pile body 0 located on the left side of the charging pile body 1 is not shown in the figure. The charging pile power distribution system based on matrix control includes 3 charging pile bodies and 9 charging terminals, each small charging pile body is connected to 3 charging terminals, and each charging pile body is provided with a 3-input 3-output switching matrix module with cascade circuits, and adjacent charging pile bodies are connected "hand in hand" through cascade circuits. Compared with the system in the prior art in which a charging pile body uses a 9-input 9-output switching matrix module to distribute power to 9 charging terminals, the number of contactors used in the system of the present invention is only 4 (3 columns of DC contactors + 1 column of cascade contactors) × 4 (3 rows of DC contactors + 1 row of cascade contactors) × 2 (each contactor has a positive contactor and a negative contactor) × 3 (3 switching matrix modules) = 96, while the number of contactors used in the system of the prior art is 9 (columns) × 9 (rows) × 2 = 162. Obviously, when the number of power modules and the number of charging terminals are the same, the number of contactors used in the present invention is small, which can effectively save the cost of the charging field.

[0073] It should be noted that Figure 4 In the circuit schematic diagram shown, DC is the power module, DC+ is the positive pole of the power module, DC- is the negative pole of the power module, the cascade lines are deployed horizontally and vertically at the edge of the matrix, the power lines are deployed horizontally in the matrix, and the charging lines are deployed vertically in the matrix; wherein, the intersection of the cascade line and the charging line is the first cascade contactor, the intersection of the cascade line and the power line is the second cascade contactor, the intersection of the power line and the charging line is the DC contactor, and the intersection of the horizontal cascade line and the vertical cascade line is provided with a third cascade contactor, and the third cascade contactor is used to control whether the current charging stack body is cascaded with the adjacent charging stack body.

[0074] by Figure 4 Taking the system shown in the figure as an example, its working principle is as follows:

[0075] Assume that the maximum output power of each power module in the charging stack body is a.

[0076] If only charging terminal 1 in the current charging stack body 1 is connected to the vehicle to be charged, the power controller obtains: the charging power of the vehicle to be charged is 1.6a, and the available power of the charging stack body 1 is 3a; there is no need to close the cascade contactor, only the DC contactor corresponding to the power module DC11 in the charging stack body 1 and the DC contactor corresponding to the power module DC12 need to be closed, so that the power module DC11 in the charging stack body 1 is connected to the charging terminal 1 (the power module DC11 is assigned to the charging terminal 1 of the current charging stack body 1) to meet its charging needs (available power: 2a>charging power: 1.6a).

[0077] If the charging terminal DC13 in the charging stack body 1 is also connected to a vehicle to be charged at this time, the power controller obtains that the charging power of the vehicle to be charged is 2a, and the available power of the charging stack body 1 is a, that is, the power 3a of the charging stack body 1 cannot meet the charging requirements of the charging terminal 1 and the charging terminal 3 at the same time (available power: 3a<charging power: 3.6a), and the available power of the charging stack body 2 is 3a; then the DC contactor corresponding to the only idle power module DC13 in the charging stack body 1 is closed, so that the power module DC13 in the charging stack body 1 is connected to the charging terminal 3 (the power a of the power module DC13 in the charging stack body 1 is distributed to At the same time, through the communication between the power controllers, the power controller in the adjacent charging stack body 2 closes the second cascade contactor corresponding to the power module DC21 in the adjacent charging stack body 2, so that the power module DC21 in the adjacent charging stack body 2 is connected to the charging terminal 3 (the power a of the power module DC21 in the adjacent charging stack body 2 is allocated to the charging terminal 13 of the charging stack body 1), thereby realizing power sharing between adjacent charging stack bodies to meet their charging needs (available power: 2a=charging power: 2a).

[0078] Please refer to Figure 6 , Embodiment 2 of the present invention:

[0079] A charging stack power distribution method based on matrix control, comprising:

[0080] S1. After detecting that a vehicle is connected to the charging terminal, the charging power of the vehicle and the idle power of the charging stack body corresponding to the charging terminal are obtained through a power controller.

[0081] S2. Determine whether the idle power of the charging stack body is greater than or equal to the charging power. If so, execute step S3; otherwise, execute step S4.

[0082] S3. Closing the DC contactor through the power controller, and distributing the power modules in the charging stack body to the charging terminal to charge the vehicle.

[0083] The S3 includes:

[0084] S31. Acquire multiple idle power modules in the charging stack body through the power controller, close the DC contactors corresponding to the multiple idle power modules and the charging terminal, and allocate the multiple idle power modules to the charging terminal to charge the vehicle.

[0085] It should be noted that the total power of the multiple idle power modules acquired by the power controller is greater than or equal to the charging power of the vehicle.

[0086] S4. Closing the cascade contactor through the power controller, and distributing the power modules in the adjacent charging stack bodies to the charging terminal to charge the vehicle.

[0087] The S4 includes:

[0088] S41. Close the cascade contactor corresponding to the charging terminal through the power controller, obtain adjacent idle power modules in the adjacent charging stack body, close the cascade contactors corresponding to the adjacent idle power modules, and allocate the adjacent idle power modules to the charging terminal to charge the vehicle.

[0089] In an optional implementation, the step before S41 includes:

[0090] The power controller is used to determine whether there is an idle power module in the charging stack body. If so, the idle power module in the charging stack body is first obtained, and the DC contactor corresponding to the idle power module and the charging terminal is closed, and then step S41 is executed; otherwise, step S41 is directly executed.

[0091] It should be noted that the total power of the idle power modules is less than the charging power of the vehicle. That is, although there are idle power modules in the charging stack body, the total power of the idle power modules cannot meet the charging power of the vehicle. The adjacent idle power modules in the adjacent charging stack bodies can be connected by closing the cascade contactor, so that the idle power modules and the adjacent idle power modules can jointly power the same charging terminal.

[0092] Before step S1, the method further includes:

[0093] S401, determining by the power controller whether each charging terminal in all charging stack bodies has a vehicle connected, if so, executing step S402; otherwise, executing step S1;

[0094] S402: Acquire an idle power module in each of the charging stack bodies, close a DC contactor corresponding to an idle power module and a charging terminal, and allocate the idle power module to a charging terminal to charge the vehicle.

[0095] That is, when each charging terminal in all charging stack bodies has a vehicle connected, each charging terminal can only be allocated one power module.

[0096] A charging stack power distribution method based on matrix control in this embodiment can be implemented by a charging stack power distribution system based on matrix control described in the first embodiment.

[0097] Please refer to Figure 5 , Embodiment 3 of the present invention:

[0098] The charging stack power distribution method based on matrix control described in the second embodiment is applied to actual scenarios through the charging stack power distribution system based on matrix control described in the first embodiment.

[0099] like Figure 5 As shown, the contactors in the system switching matrix module are numbered accordingly in the figure to facilitate the subsequent description of the corresponding contactors. The left side of the charging stack body 1 is cascaded with the charging stack body 0. Figure 5 It is assumed that the maximum output current of each power module of the charging stack body in the system is 60A, and all power modules of the charging stack bodies 0, 1, and 2 are in an idle state.

[0100] Step A1: Detect that a vehicle Car1 is connected to the charging terminal 11 of the charging stack body 1.

[0101] Step A2: The power controller obtains that the required current (charging power) of the vehicle Car1 is 100A, and the idle power of the charging stack body 1 is 3×60A=180A.

[0102] Step A3, if the idle power 180A of the charging stack body 1 is greater than the charging power 100A of the vehicle Car1, the power controller obtains the idle power modules DC11 and DC12 in the charging stack body 1, closes the DC contactors Kn1.1 and Kp1.1 corresponding to the power module DC11 and the charging terminal 11, and the DC contactors Kn1.2 and Kp1.2 corresponding to the power module DC12 and the charging terminal 11, and allocates the power modules DC11 and DC12 to the charging terminal 11 to charge the vehicle Car1.

[0103] Step A4: Detect that the vehicle Car2 is connected to the charging terminal 13 of the charging stack body 1.

[0104] Step A5: The power controller obtains that the required current of the vehicle Car2 is 160A, and the idle power of the charging stack body 1 is 1×60A=60A.

[0105] Step A6, the idle power 60A of the charging stack body 1 is less than the charging power 160A of the vehicle Car2; and the idle power 60A>0, and there is an idle power module in the charging stack body 1, then first obtain the idle power module DC13 in the charging stack body 1, close the DC contactors Kn3.3 and Kp3.3 corresponding to the power module DC13 and the charging terminal 13, allocate the power module DC13 to the charging terminal 13, and close the first cascade contactors Kn3.4 and Kp3.4 corresponding to the charging terminal 13.

[0106] Step A7, obtain the adjacent idle power modules DC21 and DC22 in the adjacent charging stack body 2, close the second cascade contactors Kn4.1 and Kp4.1 corresponding to the power module DC21 and the second cascade contactors Kn4.2 and Kp4.2 corresponding to the power module DC22, and allocate the power modules DC21 and DC22 in the adjacent charging stack body 2 to the charging terminal 13 of the charging stack body 1 to charge the vehicle Car2.

[0107] Step A8: Detect that the charging terminal 12 of the charging stack body 1 has a vehicle Car3 connected to it. Figure 5 The charging terminal 12 and its corresponding DC contactor and cascade contactor are not shown.

[0108] Step A9: The power controller obtains that the required current of the vehicle Car3 is 100A, and the idle power of the charging stack body 1 is 0×60A=0A.

[0109] Step A10, the idle power 0A of the charging stack body 1 is less than the charging power of the vehicle Car3; and the idle power = 0A, and there is no idle power module in the charging stack body 1, then the DC contactors Kn3.3 and Kp3.3 between the power module DC13 in the charging stack body 1 and the charging terminal 13 are disconnected, and at the same time, the second cascade contactors Kn4.3 and Kp4.3 corresponding to the power module DC23 in the adjacent charging stack body 2 are closed, and the power module DC23 in the adjacent charging stack body 2 is allocated to the charging terminal 13 of the charging stack body 1; at this time, the charging power of the charging terminal 13 is all provided by the power modules DC21, DC22 and DC23 in the adjacent charging stack body 2.

[0110] Step A11, close the DC contactors Kn2.3 and Kp2.3 corresponding to the power module DC13 in the charging stack body 1 and the charging terminal 12, and distribute the power module DC13 in the charging stack body 1 to the charging terminal 12 of the charging stack body 1 to power the vehicle Car3; then close the second cascade contactors Kn4.3 and Kp4.3 corresponding to the power module DC13 in the charging stack body 1.

[0111] Step A12, obtain the adjacent idle power module DC01 in the adjacent charging stack body 0, close the second cascade contactors Kn4.1 and Kp4.1 corresponding to the power module DC01 in the charging stack body 0, and allocate the power module DC01 in the adjacent charging stack body 0 to the charging terminal 12 of the charging stack body 1 to power the vehicle Car3.

[0112] In summary, the present invention provides a charging pile power distribution system and method based on matrix control, in which a cascade contactor is set in the switching matrix module, so that multiple charging pile bodies can be separated and connected by opening and closing the cascade contactor, thereby realizing the sharing of power modules between adjacent charging pile bodies, facilitating the expansion of charging capacity in the charging field, and avoiding the integration of all charging terminals and power modules on the same charging pile when expanding the scale of the charging station, and the newly added charging pile body can realize power sharing with the original charging pile body through the cascade contactor and cascade line in the switching matrix module. At the same time, by distributing the charging terminal and the power module to multiple charging pile bodies and connecting them through the cascade contactor, not only the number of contactors used in the switching matrix module is effectively reduced, the construction cost of the charging facilities is saved, but also a higher charging power can be provided for each charging terminal, the charging needs of different vehicles are met, and the reasonable distribution and utilization of the charging power are realized. In addition, compared with other power distribution schemes with cascade functions, the present invention adopts a "hand-in-hand" cascade mode, which is more flexible, and one charging pile body can be cascaded to multiple adjacent charging pile bodies at the same time.

[0113] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A charging stack power distribution system based on matrix control, characterized in that: It includes a plurality of charging stack bodies and charging terminals; each of the charging stack bodies includes a power controller, a switching matrix module and a plurality of power modules; the switching matrix module includes a DC contactor and a cascade contactor; In the charging stack body, the power controller is respectively connected to the DC contactor, the cascade contactor, the multiple power modules and the multiple charging terminals corresponding to the charging stack body; the multiple power modules are connected to the multiple charging terminals through the DC contactor; the multiple charging terminals are connected to the power modules of adjacent charging stack bodies through the cascade contactor; The switching matrix module also includes a cascade line, a power line and a charging line; The charging terminal of the charging stack body is connected to the power module of the adjacent charging stack body through the charging line, the cascade contactor and the cascade line; The multiple power modules of the charging stack body are connected to the charging terminal of the charging stack body through the power line, the DC contactor and the charging line; The multiple power modules of the charging stack body are connected to the charging terminals of the adjacent charging stack bodies through the power lines, cascade contactors and cascade lines; The cascade contactor comprises a first cascade contactor; One end of the charging line is connected to the charging terminal of the charging stack body, the other end of the charging line is connected to one end of the cascade line through the first cascade contactor, and the other end of the cascade line is connected to the power module of the adjacent charging stack body; One end of the power line is connected to the power module of the charging stack body, and the other end of the power line is connected to the charging terminal of the charging stack body through the DC contactor; The cascade contactor comprises a second cascade contactor; One end of the power line is connected to the power module of the charging stack body, the other end of the power line is connected to one end of the cascade line through the second cascade contactor, and the other end of the cascade line is connected to the charging terminal of the adjacent charging stack body; The cascade line includes a transverse cascade line and a longitudinal cascade line. A third cascade contactor is provided at the intersection of the transverse cascade line and the longitudinal cascade line. The third cascade contactor is used to control whether the current charging stack body is cascaded with the adjacent charging stack body.

2. A charging stack power distribution system based on matrix control according to claim 1, characterized in that: The power controllers between the multiple charging stack bodies are connected via Ethernet, RS485 communication line or CAN communication line.

3. The charging stack power distribution system based on matrix control according to claim 1 is characterized in that: The number of the charging terminals is less than or equal to the number of the power modules.

4. A charging stack power distribution method based on matrix control, characterized in that: A charging stack power distribution system based on matrix control as described in any one of claims 1 to 3, the method comprising: After detecting that a vehicle is connected to the charging terminal, the charging power of the vehicle and the idle power of the charging stack body corresponding to the charging terminal are obtained through the power controller; Determine whether the idle power of the charging stack body is greater than or equal to the charging power, and if so, close the DC contactor through the power controller to allocate the power module in the charging stack body to the charging terminal to charge the vehicle; Otherwise, closing the cascade contactor through the power controller to distribute the power modules in the adjacent charging stack bodies to the charging terminal to charge the vehicle; The method of closing the cascade contactor by the power controller to distribute the power modules in the adjacent charging stack bodies to the charging terminal to charge the vehicle includes: The power controller closes the cascade contactor corresponding to the charging terminal, obtains adjacent idle power modules in the adjacent charging stack body, closes the cascade contactors corresponding to the adjacent idle power modules, and allocates the adjacent idle power modules to the charging terminal to charge the vehicle.

5. A charging stack power distribution method based on matrix control according to claim 4, characterized in that: The step of closing the DC contactor by the power controller to distribute the power module of the charging stack body to the charging terminal to charge the vehicle includes: The power controller obtains multiple idle power modules in the charging stack body, closes the DC contactors corresponding to the multiple idle power modules and the charging terminal, and distributes the multiple idle power modules to the charging terminal to charge the vehicle.

6. A charging stack power distribution method based on matrix control according to claim 4, characterized in that: Before detecting that a vehicle is connected to the charging terminal, the method further includes: The power controller is used to determine whether each charging terminal in all charging stack bodies has a vehicle connected. If so, an idle power module in each charging stack body is obtained, and a DC contactor corresponding to an idle power module and a charging terminal is closed, and the idle power module is allocated to one charging terminal to charge the vehicle.

Images