Power distribution system and charging pile

Abstract

The invention relates to the technical field of power distribution, in particular to a power distribution system, which comprises a first loop structure, a second loop structure, an intermediate allocation structure and 2A terminals, A is greater than or equal to 3, the first loop structure is formed by connecting A first power supply module groups and first relay groups end to end to form a loop, the second loop structure is formed by connecting A second power supply module groups and second relay groups end to end to form a loop, the middle allocation structure is formed by connecting A middle power supply module groups and a plurality of middle relay groups to form a full matrix structure, and 2A terminals are correspondingly and directly connected to A first power supply module groups and A second power supply module groups. The intermediate power supply module group is correspondingly connected with the first power supply module group through the first bridging relay group, and is correspondingly connected with the second power supply module group through the second bridging relay group. According to the power distribution system, a ring-full matrix-ring type structure is adopted, flexible power distribution can be achieved, the number of relays is reduced, and cost is reduced.

Description

Technical Field

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

[0002] The power distribution strategies currently used by high-power split-type charging piles on the market can be roughly divided into the following types: ring power distribution strategy, "ring + meter" power distribution strategy and full matrix power distribution strategy.

[0003] Among them, the first ring power distribution strategy, such as a ring power distribution scheme disclosed in the utility model patent with application number "202123365645.X" and name "A device for extending charging parking spaces", includes multiple power modules, and multiple power modules are connected hand in hand through relays to form a ring structure. This power distribution scheme is simple and low-cost, but the power distribution is not flexible. Assuming that there are 1-12 parking spaces, and the parking spaces are numbered 1 to 12 respectively, when only parking spaces 1, 2, and 3 are charging, parking spaces 1 and 3 can call adjacent idle modules to charge at full power, while parking space 2 has only one direct connection module for power supply, and other idle modules cannot be called, and its power requirements cannot be met, and a lot of idle modules are wasted.

[0004] The second type of power distribution strategy is generated on the basis of the first type of ring power distribution strategy, such as the "ring + meter" power distribution scheme disclosed in the invention patent with application number "202110904230.0" and name "Charging Topology Network and DC Contactor Control System and Method in Charging System", which includes six outputs, namely output 1 to output 6. In addition to connecting outputs 1 to 6 in sequence through relays to form a ring structure, output 1 is also connected to output 4, output 2 to output 5, and output 3 to output 6 through relays, so that each output can also call the diagonal power module, solving the problem of module idleness in the ring power distribution scheme. However, this power distribution scheme still has a blind spot in allocation and cannot provide high-priority services for specific users; for example, there are 6 parking spaces corresponding to 6 outputs, namely parking spaces 1 to 6. At this time, if there are cars charging in parking spaces 1, 2, 3, 4, and 5, parking spaces 2 and 4 cannot call the module of parking space 6. Even if parking spaces 2 and 4 are VIP customers, they can still only get one module.

[0005] In order to solve this problem, a third type of power distribution strategy, namely the full-matrix power distribution scheme, has emerged. For example, the invention patent with application number "202011360249.5" and name "A full-matrix distribution method for high-power DC chargers" discloses a full-matrix power distribution scheme that can achieve flexible full-matrix power distribution. However, its essence is to use multiple groups of relays and busbars to build a relay circuit that is more sophisticated than the "ring + meter" shape. When the number of output circuits is small, it has a very high cost performance; but with the development of the times, products with higher power such as 600kW, 720kW, and 960kW have come out one after another, and the cost of building a full-matrix solution has risen sharply. Taking a rectifier cabinet with a power of 600kW and 10 DC output circuits as an example, if a full-matrix solution is adopted, at least 110 relays are required to build the circuit. The large number of relay circuits will occupy the space in the cabinet, making the volume of the rectifier cabinet larger; in addition, the writing of software programs will become particularly complicated; in the process of deploying so many relays to open and close, once the relay adhesion problem occurs, maintenance will become very troublesome.

[0006] Therefore, the current power distribution strategy of high-power split-type charging piles has the problem of low cost but inflexible power distribution, or flexible power distribution but high cost. Summary of the invention

[0007] In order to solve the technical problems in the prior art that the power distribution strategy has low cost but insufficient flexibility in power distribution or that the power distribution is flexible enough but the cost is very high, the present invention proposes a power distribution system, which includes a first loop structure, a second loop structure and an intermediate allocation structure, which can achieve more flexible power distribution compared with the ring and "ring + meter" shapes, and the number of relays and cost are much lower than the full matrix distribution solution.

[0008] The technical solution of the present invention: A power distribution system, comprising: A first loop structure, wherein the first loop structure includes A first power module groups, A≥3, the A first power module groups are connected end to end to form a loop, and a first relay group is arranged between every two adjacent first power module groups; A second loop structure, wherein the second loop structure includes A second power module groups, the A second power module groups are connected end to end to form a loop, and a second relay group is arranged between every two adjacent second power module groups; An intermediate adjustment structure, wherein the intermediate adjustment structure comprises A intermediate power module groups, and any two of the A intermediate power module groups are connected via an intermediate relay group; 2A terminals, the 2A terminals are directly connected to A first power module groups and A second power module groups in a one-to-one correspondence, the A first power module groups are also connected to A intermediate power module groups in a one-to-one correspondence through A first jumper relay groups, and the A second power module groups are also connected to A intermediate power module groups in a one-to-one correspondence through A second jumper relay groups.

[0009] Further, each of the first power module group, the second power module group, and the intermediate power module group includes at least one power module.

[0010] Further, the first relay group includes a first positive relay and a first negative relay, the second relay group includes a second positive relay and a second negative relay, the intermediate relay group includes an intermediate positive relay and an intermediate negative relay, the first jumper relay group includes a first jumper positive relay and a first jumper negative relay, and the second jumper relay group includes a second jumper positive relay and a second jumper negative relay.

[0011] Another aspect of the present invention provides a charging pile, comprising the aforementioned power distribution system.

[0012] Furthermore, the charging pile includes a first mounting plate and a second mounting plate, and the first positive relay, the second positive relay, the middle positive relay, the first jumper positive relay and the second jumper positive relay are installed on the first mounting plate; the first negative relay, the second negative relay, the middle negative relay, the first jumper negative relay and the second jumper negative relay are installed on the second mounting plate.

[0013] Furthermore, the first positive relays are arranged vertically in sequence and located on one lateral side of the middle positive relay, and the second positive relays are arranged vertically in sequence and located on the other lateral side of the middle positive relay; the first negative relays are arranged vertically in sequence and located on one lateral side of the middle negative relay, and the second negative relays are arranged vertically in sequence and located on the other lateral side of the middle negative relay; the first positive relay / second positive relay / first negative relay / second negative relay are connected end to end through a plurality of connecting copper bars.

[0014] Furthermore, the intermediate positive relay / intermediate negative relay is connected to A jumper copper bars through a plurality of transfer copper bars, and the jumper copper bar is also correspondingly connected to the intermediate power module group; the intermediate positive relay / intermediate negative relay is arranged in ascending or descending order from top to bottom, forming A-1 rows and A-1 columns, and the input end or output end of the intermediate positive relay / intermediate negative relay in the same column shares a transfer copper bar.

[0015] Further, the first jumper positive relay is arranged between the first positive relay and the middle positive relay, and the second jumper positive relay is arranged between the second positive relay and the middle positive relay; the first jumper negative relay is arranged between the first negative relay and the middle negative relay, and the second jumper negative relay is arranged between the second negative relay and the middle negative relay; the first jumper positive relay and the second jumper positive relay and the first jumper negative relay and the second jumper negative relay are connected correspondingly through the jumper copper busbar, the first jumper positive relay / the second jumper positive relay / the first jumper negative relay / the second jumper negative relay are arranged vertically in sequence, and are laterally led outward through multiple output copper buses and overlapped with the corresponding connecting copper buses, and a pad is provided at the bottom of the first jumper positive relay / the second jumper positive relay / the first jumper negative relay / the second jumper negative relay.

[0016] Furthermore, the first mounting plate, the first positive relay, the second positive relay, the middle positive relay, the first jumper positive relay and the second jumper positive relay, as well as the matching connecting copper bus, the transfer copper bus, the jumper copper bus and the output copper bus, form a first mounting module; the second mounting plate, the first negative relay, the second negative relay, the middle negative relay, the first jumper negative relay and the second jumper negative relay, as well as the matching connecting copper bus, the transfer copper bus, the jumper copper bus and the output copper bus, form a second mounting module; the first mounting module and the second mounting module have the same structure.

[0017] Furthermore, the charging pile also includes a cabinet, in which the first installation module and the second installation module are installed; the first power module group, the second power module group and the intermediate power module group are arranged in the cabinet and located above the first installation module and the second installation module, and are correspondingly connected to each output copper bus and the jumper copper bus through a tail plug wiring harness.

[0018] After adopting the above technical solution, the power distribution system and charging pile provided by the present invention have the following beneficial effects compared with the prior art: 1. The power distribution system provided by the present invention adopts a "ring-ring star full matrix-ring" structure, divides the required output terminals into two loops, and sets up a ring star full matrix structure for free allocation of the two loops. On the basis of achieving basically the same effect as the full matrix power distribution scheme in the prior art, it saves more relays and reduces costs.

[0019] 2. The power distribution system provided by the present invention can realize the flexible calling of power modules, which is convenient for realizing various energy replenishment modes: the priority can be directly defined according to "first come, first served", which is suitable for third-party sites to improve their turnover rate; the power priority can also be customized, which is suitable for OEM brand sites to improve their brand user stickiness.

[0020] 3. In the charging pile provided by the present invention, the relays in the first relay group and the second relay group are arranged vertically and are located on both sides of the middle relay group respectively. The arrangement is compact and reasonable, which is convenient for wiring, installation and later maintenance.

[0021] 4. The charging pile provided by the present invention reduces the overall lateral occupied space through the reasonable arrangement of the intermediate relay group and the partial sharing of the transfer copper busbar.

[0022] 5. The charging pile provided by the present invention is provided with two installation modules of the same structure, which can be pre-assembled to facilitate stocking and on-site installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the topological structure of the power distribution system of the first embodiment; Figure 2 It is a front view of the first installation module of the third embodiment; Figure 3 It is a front view of the second installation module of the third embodiment; Figure 4 A three-dimensional diagram of the first installation module / the second installation module of Embodiment 3; Figure 5 This is a schematic diagram of the internal structure of the cabinet front of Example 3; Figure 6 This is a schematic diagram of the internal structure of the cabinet side of Example 3; Figure 7 This is a schematic diagram of the internal structure of the back of the cabinet of Example 3; Figure 8 It is a three-dimensional diagram of the cabinet of the third embodiment.

[0024] in, First loop structure 1, first power module group 11, first relay group 12, first positive relay 12a, first negative relay 12b; Second loop structure 2, second power module group 21, second relay group 22, second positive relay 22a, second negative relay 22b; Intermediate adjustment structure 3, intermediate power module group 31, intermediate relay group 32, intermediate positive relay 32a, intermediate negative relay 32b, first jumper relay group 33, first jumper positive relay 33a, first jumper negative relay 33b, second jumper relay group 34, second jumper positive relay 34a, second jumper negative relay 34b; Cabinet 4, first mounting plate 41a, second mounting plate 41b, connecting copper bar 42, jumper copper bar 43, transfer copper bar 44, output copper bar 45, pad 46, insulator 47, insulator bracket 471, external cable 48, module compartment 49, tail plug harness 491. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0028] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] like Figure 1 As shown, this embodiment provides a power distribution system, including a first loop structure 1, a second loop structure 2 and an intermediate allocation structure 3, wherein the first loop structure 1 includes A first power module groups 11, A is a positive integer and A≥3, the A first power module groups 11 are connected end to end to form a loop, a first relay group 12 is arranged between every two adjacent first power module groups 11, the number of the first relay groups 12 is also A, and the first relay group 12 controls the parallel connection between the two adjacent first power module groups 11; the second loop structure 2 also includes A A second power module group 21, A second power module groups 21 are connected end to end to form a loop, a second relay group 22 is arranged between every two adjacent second power module groups 21, the number of second relay groups 22 is also A, and the second relay group 22 controls the parallel connection between two adjacent second power module groups 21; the intermediate adjustment structure 3 also includes A intermediate power module groups 31, any two of the A intermediate power module groups 31 are connected through an intermediate relay group 32, and the parallel connection between the two intermediate power module groups 31 is realized by the intermediate relay group 31.

[0031] The power distribution system also includes 2A terminals, of which A terminals are directly connected to A first power module groups 11 in a one-to-one correspondence, and the other A terminals are directly connected to A second power module groups 21 in a one-to-one correspondence; the A first power module groups 11 are also connected to A intermediate power module groups 31 in a one-to-one correspondence through A first jumper relay groups 33, and the first jumper relay group 33 controls the parallel connection between the first power module group 11 and the corresponding intermediate power module group 31; the A second power module groups 21 are also connected to A intermediate power module groups 31 in a one-to-one correspondence through A second jumper relay groups 34, and the second jumper relay group 34 controls the parallel connection between the second power module group 21 and the corresponding intermediate power module group 31.

[0032] Each of the first power module group 11, the second power module group 21, and the intermediate power module group 31 includes at least one power module, and the specific number can be defined as needed. If the first power module group 11, the second power module group 21, or the intermediate power module group 31 includes two or more power modules, these power modules are preferably connected in parallel. The power of a single power module can be selected but not limited to 30kW, 40kW, etc.

[0033] Since each of the first power module group 11, the second power module group 21 and the intermediate power module group 31 includes a positive terminal and a negative terminal, in order to achieve corresponding connection, the first relay group 12 of the present embodiment includes a first positive relay 12a and a first negative relay 12b, which are respectively used to connect the positive terminal and the negative terminal of each first power module group 11; the second relay group 22 includes a second positive relay 22a and a second negative relay 22b, which are respectively used to connect the positive terminal and the negative terminal of each second power module group 21; the intermediate relay group 32 includes an intermediate positive relay The first jumper relay group 33 includes a first jumper positive relay 33a and a first jumper negative relay 33b, which are respectively used to connect the positive terminal and negative terminal of each intermediate power module group 31; the second jumper relay group 34 includes a second jumper positive relay 34a and a second jumper negative relay 34b, which are respectively used to connect the positive terminal and negative terminal of the corresponding second power module group 21 and the intermediate power module group 31.

[0034] The number A can be set as needed, and in principle is at least three; the following is a specific description of the charging pile rectifier cabinet with a power of 600KW and a 10-way DC output circuit (A=5). The first loop structure 1 includes 5 first power module groups 11, namely power module groups M1~M5, each first power module group 11 includes a 40kW power module; every two adjacent first power module groups 11 are connected by a pair of 400A relays to form a loop. The second loop structure 2 also includes 5 second power module groups 21, namely power module groups M6~M10, each second power module group 21 includes a 40kW power module; every two adjacent second power module groups 21 are connected by a pair of 400A relays to form a loop. The intermediate allocation structure 3 also includes 5 intermediate power module groups 31, namely power module groups M11~M15, each intermediate power module group 31 includes a 40kW power module, and any two intermediate power module groups 31 are connected by a pair of 400A relays. Terminals 1 to 5 of the 10 terminals are directly connected to power module groups M1 to M5, terminals 6 to 10 are directly connected to power module groups M6 to M10, and power module groups M1 to M5 are also connected to power module groups M11 to M15 through 5 pairs of 400A relays, and power module groups M6 to M10 are also connected to power module groups M11 to M15 through 5 pairs of 400A relays. In this way, there are a total of 15 40kW power modules and 60 (30 pairs) 400A relays.

[0035] In this embodiment, the first loop structure 1 is formed into a ring-shaped power distribution structure, the second loop structure 2 is formed into another ring-shaped power distribution structure, and the intermediate allocation structure 3 is formed into a small full-matrix power distribution structure in a ring-star shape for allocation of the first loop structure 1 and the second loop structure 2. In this way, the first loop structure 1, the intermediate allocation structure 3 and the second loop structure 2 are connected together to form an overall structure of "ring-ring-star full matrix-ring"; in this scheme, any terminal can call the idle power module group in the loop where it is located, and can also call the idle power module group in the intermediate allocation structure 3. In addition, it can also call the idle power module group in another loop through the intermediate allocation structure 3, that is, any terminal can allocate the idle power module group at any position through multiple routes, and its power allocation flexibility is much greater than the ring or "ring + meter" power allocation scheme in the prior art, which is basically the same as the full matrix power allocation, but the number of relays used is much lower than the full matrix power allocation scheme. Taking 600KW power and 10 DC output circuits as an example, the full-matrix power distribution solution in the prior art requires more than 100 relays to build the circuit, while in this embodiment, only 60 relays are needed to complete the construction of the entire circuit.

[0036] From the above content, it can be seen that the power distribution system provided in this embodiment adopts a "ring-ring star full matrix-ring" structure. While achieving basically the same effect as the full matrix power distribution scheme in the prior art, it saves more relays and reduces costs.

[0037] Embodiment 2:

[0038] This embodiment uses Figure 1 The power allocation strategy is described by taking 600kW and 10 terminals as an example. It is defined that one terminal corresponds to one parking space, and there are 12 parking spaces in total, namely parking spaces No. 1 to No. 12, corresponding to terminals 1 to 12.

[0039] When only one vehicle needs to be charged, any idle power module can be called for charging. For example, when charging in parking space No. 1, first allocate power module group M1 to it, and then call other idle power module groups in the first loop structure 1 in sequence until the power demand of the vehicle is met; if the 5 power module groups in the first loop structure 1 still cannot meet its power demand, close the relay between the first loop structure 1 and the intermediate allocation structure 3, and start to call the power module groups M11~M15 in the intermediate allocation structure 3 in sequence until the power demand of the vehicle is met; if the 10 power module groups in the first loop structure 1 and the intermediate allocation structure 3 still cannot meet the power demand of the vehicle, continue to close the relay between the intermediate allocation structure 3 and the second loop structure 2, and start to call the power module groups M6~M10 in the second loop structure 2 in sequence.

[0040] When two cars need to be charged, both cars can flexibly call each idle power module for charging. For example, when the first car is parked in parking space No. 1 and the second car is parked in parking space No. 2 among parking spaces No. 2 to No. 5, firstly, the power module groups M1 and M2 in the first loop structure 1 are respectively allocated to the two cars, and then the power module groups M3 to M5 are allocated. If the power demand cannot be met, the relays in the first loop structure 1 and the intermediate allocation structure 3 and the second loop structure 2 and the intermediate allocation structure 3 can be closed, so that the first car can call the idle power module groups in the intermediate allocation structure 3 and the second loop structure 2 through the power module groups M11 and M6, and the second car can call the idle power modules in the intermediate allocation structure 3 and the second loop structure 2 through the power module groups M12 and M7. Similarly, when the first car parks in parking space No. 1 and the second car parks in other parking spaces between No. 2 and No. 5, or when the first car parks in parking space No. 1 and the second car parks in any parking space between No. 6 and No. 10, each car can flexibly call on all idle power module groups.

[0041] When three vehicles need to be charged, all three vehicles can flexibly call each idle power module for charging. For example, when the first vehicle is parked in parking space No. 1 for charging, and the second and third vehicles are parked in parking spaces No. 2 and No. 3 among parking spaces No. 2 to No. 5, the power module groups M1, M2, and M3 in the first loop structure 1 are first allocated to the three vehicles respectively, and then the power module groups M4 and M5 are allocated. If the power demand cannot be met, the relays in the first loop structure 1 and the intermediate allocation structure 3 and the second loop structure 2 and the intermediate allocation structure 3 can be closed, so that the first vehicle can call the idle power module groups in the intermediate allocation structure 3 and the second loop structure 2 through the power module groups M11 and M6, the second vehicle can call the idle power module groups in the intermediate allocation structure 3 and the second loop structure 2 through the power module groups M12 and M7, and the second vehicle can call the idle power module groups in the intermediate allocation structure 3 and the second loop structure 2 through the power module groups M13 and M8.

[0042] Specifically, for example, there are three cars A, B, and C coming to charge. Cars A, B, and C arrive in sequence, and the power demand of car A is defined as Na=240kW, the power demand of car B is Nb=160kW, and the power demand of car C is Nc=200kW. Among them, car A stops at parking space 1 and plugs in, car B follows closely and stops at parking space 2 and plugs in, and car C stops at parking space 3 and plugs in.

[0043] If the power distribution scheme is a traditional ring power distribution scheme, then car B can only obtain 1 power module of 40kW, which is far less than its required power of 160kW. Under the power distribution strategy of this embodiment, the power module groups directly connected to the corresponding terminals of each car in the first loop structure 1 are first distributed, and the power module group M1 is distributed to car A, the power module group M2 is distributed to car B, and the power module group M3 is distributed to car C; then the remaining power module group M5 in the first loop structure 1 is distributed to car A, and the power module group M4 is distributed to car C. At this time, the power of car A = 80kW < 240kW, the power of car B = 40kW < 160kW, and the power of car C = 80kW < 200kW. Since the power module group of the first loop structure 1 cannot meet the charging power requirements of the three vehicles, the corresponding relays of the first loop structure 1 and the intermediate allocation structure 3 are closed at this time, and the power module group M11 is allocated to vehicle A, the power module group M12 is allocated to vehicle B, and the power module group M13 is allocated to vehicle C. At this time, the power of vehicle A = 120kW < 240kW, the power of vehicle B = 80kW < 160kW, and the power of vehicle C = 120kW < 200kW, which still cannot meet the power requirements of the three vehicles. Since the power module groups of the second loop structure 2 are still idle, the corresponding relays of the intermediate allocation structure 3 and the second loop structure 2 are continued to be closed, and the power module group M6 is allocated to vehicle A, the power module group M7 is allocated to vehicle B, and the power module group M8 is allocated to vehicle C. At this time, the power of vehicle A = 160kW < 240kW, the power of vehicle B = 120kW < 160kW, and the power of vehicle C = 160kW < 200kW. Continue to allocate the power module group M10 in the second loop structure 2 to car A, and the power module group M9 to car C. At this time, the power demand of car C is met, and the power of car A = 200kW < 240kW, and the power of car B = 120kW < 160kW. There are still two power module groups that can be called in the intermediate allocation structure 3. The power module group M15 is allocated to car A, and the power module group M14 is allocated to car B. At this time, the power demand of car A and car B are also met. Of course, the allocation method of each car is not limited to this, but under other allocation methods, each car can also flexibly call each idle power module group to meet its power demand.

[0044] Similarly, when the first car parks in parking space No. 1; the second car and the third car park in other parking spaces among No. 2 to No. 5, or the second car parks in any parking space among No. 2 to No. 5 and the third car parks in any parking space among No. 6 to No. 10, or the second car and the third car park in any two parking spaces among No. 6 to No. 10, each car can flexibly call on all idle power module groups.

[0045] When four vehicles need to be charged, in the ring + meter-shaped solution in the prior art, if three of the vehicles are parked on the left side, right side and diagonal side of the ring of the fourth vehicle, the fourth vehicle can no longer call other idle power modules; and the power allocation strategy of this embodiment is similar to this situation. For example, when four vehicles are parked in parking spaces 1, 2, 3 and 7 respectively, parking space 2 can still call multiple idle power module groups through the intermediate allocation structure 3; the allocation path is increased, the allocation blind area is reduced, and the power allocation flexibility is improved.

[0046] And so on; When ten vehicles need to be charged, the power module groups M1 to M10 are firstly allocated to the first to tenth vehicles respectively, and then the power module groups M11 to M15 in the intermediate allocation structure 3 can be called as needed.

[0047] When allocating power, you can define the priority according to "first come, first served", that is, give priority to supplying idle power module groups to vehicles that plug in first according to time priority. This is suitable for third-party stations to improve their turnover rate. You can also customize the power priority, for example, give priority to supplying idle power module groups to vehicles of the OEM brand. This is suitable for OEM brand stations to improve their brand user stickiness.

[0048] Among them, the allocation is based on "first come, first served". Specifically, for example, when there are ten cars that need to be charged, the power module groups M1 to M10 are first allocated to the first to tenth cars respectively. Then it is detected that the car in parking space No. 7 is the first to be charged, and its required power is 120kW, so the power module group M12 and the power module group M13 are allocated to car 7 together to meet its power demand. It is detected that the car in parking space No. 8 is the second to be charged, and its required power is 160kW. Therefore, the power module group previously allocated to car 7 is changed to power module group M12 and power module group M11, and power module group M13, power module group M14 and power module group M15 are allocated to car 8. When the required power of car 7 is reduced to 80kW, the idle power module group M11 can be allocated to the third car. If the third car to be plugged in is in parking space No. 9, the power module group M13, power module group M14 and power module group M15 originally assigned to car 8 are replaced with power module group M13, power module group M11 and power module group M15, and power module group M14 is assigned to car 9.

[0049] Among them, the power priority is customized according to the host plant station. Specifically, for example, when there are ten cars that need to be charged, the power module groups M1 to M10 are first allocated to the first to tenth cars respectively. Then it is detected that the cars in parking spaces 1, 3 and 7 are brand cars of the current brand charging station, and their plug-in order is 1, 3 and 7, and the required power is 120kW. So the power module group M11 and the power module group M15 are allocated to car 1 together, the power module group M13 and the power module group M14 are allocated to car 3 together, and the power module group M12 is allocated to car 7. When the required power of car 1 drops to 80kW, the power module group M15 can be transferred to car 7.

[0050] From the above content, it can be seen that the power allocation strategy of this embodiment, the small full-matrix loop formed by the intermediate deployment structure 3 plays the advantages of the full-matrix strategy, and can flexibly call idle modules through it, solving the problem of insufficient flexibility of power allocation in the ring and "ring + meter" shaped solutions in the prior art. In essence, the power allocation strategy of this embodiment optimizes the existing full-matrix strategy, incorporates the advantages of the ring loop on the basis of retaining its essence, simplifies the complex arrangement of the full-matrix loop, and reduces costs.

[0051] Embodiment three:

[0052] This embodiment provides a charging pile, preferably a split charging pile including a rectifier cabinet and multiple terminals, the charging pile includes the power distribution system described in embodiment 1, and can use the power distribution strategy described in embodiment 2 to distribute power. The rectifier cabinet structure of the charging pile is described in detail below.

[0053] like Figure 2-8 As shown, the charging pile of this embodiment includes a first mounting plate 41a and a second mounting plate 41b, on which A first positive relays 12a, A second positive relays 22a, A*(A-1) / 2 intermediate positive relays 32a, A first jumper positive relays 33a and A second jumper positive relays 34a are installed; on the second mounting plate 41b, A first negative relays 12b, A second negative relays 22b, A*(A-1) / 2 intermediate negative relays 32b, A first jumper negative relays 33b and A second jumper negative relays 34b are installed. In the specific embodiment shown in the figure, A=5.

[0054] Among them, A first positive relays 12a are arranged vertically in sequence along the vertical direction and are located on one side of the middle positive relay 32a, for example Figure 2 A second positive relay 22a is also arranged vertically in the vertical direction, and is located on the other side of the middle positive relay 32a, for example Figure 2 The middle positive relay 32a is located in the middle area. A first negative relay 12b is arranged vertically in sequence along the vertical direction and is located on one side of the middle negative relay 32b, for example Figure 3 A second negative relay 22b is arranged vertically in the vertical direction and located on the other side of the middle negative relay 32b, for example Figure 3 The middle negative relay 32b is located in the middle area. A first positive relay 12a / second positive relay 22a / first negative relay 12b / second negative relay 22b are connected end to end through a plurality of connecting copper bars 42 to form four ring connection structures.

[0055] Taking the first mounting plate 41a as an example, the A first positive relays 12a / second positive relays 22a arranged thereon are arranged vertically, and two vertical annular connection structures are formed by the copper bar, and the two annular connection structures are respectively arranged on the left and right sides of the middle positive relay 32a. This arrangement makes the overall height of the first mounting plate 41a and its parts smaller, which is convenient for wiring, installation and maintenance; and because power modules and other components need to be arranged on the top, the height of the entire rectifier cabinet can also be reduced; in addition, the arrangement in the horizontal direction is also compact and reasonable, reducing space occupancy.

[0056] Among them, A*(A-1) / 2 intermediate positive relays 32a / intermediate negative relays 32b are connected to A jumper copper bars 43 through several transfer copper bars 44, and A jumper copper bars 43 are correspondingly connected to A intermediate power module groups 31, thereby forming a pairwise connection of the intermediate power module groups 31; A*(A-1) / 2 intermediate positive relays 32a / intermediate negative relays 32b are arranged in ascending or descending order from top to bottom, forming A-1 rows and A-1 columns, and the input or output ends of the intermediate positive relays 32a / intermediate negative relays 32b in the same column share a transfer copper bar 44.

[0057] Taking the first mounting plate 41a as an example, five horizontal jumper copper bars 43 are provided on it, and these five jumper copper bars 43 are connected through ten intermediate positive relays 32a and a plurality of transfer copper bars 44. The ten relays are arranged in ascending order from top to bottom, forming four rows and four columns, the first row includes one relay, the second row includes two relays, the third row includes three relays, and the fourth row includes four relays; and the output ends, i.e. the right ends, of the four relays in the first column share a transfer copper bar 44, that is, the transfer copper bar 44 is connected to the first jumper copper bar 43 above and the right ends of the four intermediate positive relays 32a in the first column; similarly, the output ends of the three relays in the second column share a transfer copper bar 44, and the output ends of the two relays in the third column share a transfer copper bar 44. This arrangement and connection method reduces the number of transfer copper bars 44, reduces the lateral length of each bridging copper bar 43, and reduces the lateral space occupied by the entire first mounting plate 41a and the parts thereon.

[0058] Among them, A first jumper positive relays 33a are arranged vertically in sequence and are set between the first positive relay 12a and the middle positive relay 32a; A second jumper positive relays 34a are arranged vertically in sequence and are set between the second positive relay 22a and the middle positive relay 32a; A first jumper negative relays 33b are arranged vertically in sequence and are set between the first negative relay 12b and the middle negative relay 32b; A second jumper negative relays 34b are arranged vertically in sequence and are set between the second negative relay 22b and the middle negative relay 32b. The first jumper positive relay 33a and the second jumper positive relay 34a, as well as the first jumper negative relay 33b and the second jumper negative relay 34b are connected correspondingly through the jumper copper bar 43. A first jumper positive relay 33a / second jumper positive relay 34a / first jumper negative relay 33b / second jumper negative relay 34b are led outward (to the left or right) through A output copper bars 45 and overlapped with the corresponding connecting copper bars 42. The extension lengths of each output copper bar 45 are different so that they can be led downwards respectively through external cables 48. The external cables 48 can be directly connected to each output copper bar 45 through terminals as needed, or can also be connected to the connecting copper bar 42 correspondingly overlapped with the output copper bar 45, for example Figure 2 , 3 The external cables 48 corresponding to the middle terminals 1 and 6 are connected to the connecting copper bus 42 through terminals. The output copper bus 45 corresponding to the terminals 1 and 6 are also extended for overlapping of the two annular connection structures, which is conducive to the compact arrangement of the structure and subsequent wiring installation.

[0059] A pad 46 is provided at the bottom of the A first jumper positive relay 33a / second jumper positive relay 34a / first jumper negative relay 33b / second jumper negative relay 34b in this embodiment. The pad 46 is provided on the first mounting plate 41a to compensate for the height difference caused by the overlap of the copper bars, specifically to compensate for the height difference caused by the overlap of the output copper bar 45 and the connection copper bar 42, so as to reduce the number of bends and processing complexity of the output copper bar 45. A plurality of insulators 47 are also provided on the first mounting plate 41a of this embodiment to assist in fixing the copper bars, and an insulator bracket 471 may be provided to compensate for the height difference if necessary.

[0060] The first mounting plate 41a, the first positive relay 12a, the second positive relay 22a, the middle positive relay 32a, the first jumper positive relay 33a and the second jumper positive relay 34a, as well as the matching connecting copper bar 42, the transfer copper bar 44, the jumper copper bar 43, the output copper bar 45, as well as the matching pad 46, the insulator 47, the insulator bracket 471, the fasteners, etc., form a first mounting module; the second mounting plate 41b, the first negative relay 12b, the second negative relay 22b, the middle negative relay 32b, the first jumper negative relay 33b and the second jumper negative relay 34b, as well as the matching connecting copper bar 42, the transfer copper bar 44, the jumper copper bar 43 and the output copper bar 45, as well as the matching pad 46, the insulator 47, the insulator bracket 471, the fasteners, etc., form a second mounting module; preferably, the first mounting module and the second mounting module have the same structure. In this way, the first installation module and the second installation module can be pre-assembled and then installed in the cabinet body 4 of the rectifier cabinet, which is convenient for stocking and installation.

[0061] The charging pile of this embodiment also includes a cabinet 4, and the first installation module and the second installation module are installed on the front and back of the cabinet 4 respectively. The first power module group 11, the second power module group 21 and the middle power module group 31 are arranged in the cabinet 4 and located in the module compartment 49 area above the first installation module and the second installation module, and are connected to the left and right output copper bars 45 and the middle jumper copper bar 43 through their tail plug harnesses 491.

[0062] It should be noted that, in this embodiment, the copper bars used for connection can be bent forward and backward as needed to avoid the required electrical distance. The installation of each part and the overlap of the copper bars can be connected by fasteners of appropriate specifications. This embodiment does not limit this.

[0063] It can be seen from the above content that a charging pile provided in this embodiment adopts the power distribution system described in Example 1, and reduces the overall occupied space through reasonable structural arrangement, which is convenient for stocking, installation and later maintenance.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power distribution system, characterized in that: include: A first loop structure (1), the first loop structure (1) comprising A first power module groups (11), A≥3, the A first power module groups (11) being connected end to end to form a loop, and a first relay group (12) being arranged between every two adjacent first power module groups (11); A second loop structure (2), the second loop structure (2) comprising A second power module groups (21), the A second power module groups (21) being connected end to end to form a loop, and a second relay group (22) being arranged between every two adjacent second power module groups (21); An intermediate adjustment structure (3), the intermediate adjustment structure (3) comprising A intermediate power module groups (31), any two of the A intermediate power module groups (31) being connected via an intermediate relay group (32); 2A terminals, the 2A terminals are directly connected to A first power module groups (11) and A second power module groups (21) in a one-to-one correspondence, the A first power module groups (11) are also connected to A intermediate power module groups (31) in a one-to-one correspondence via A first jumper relay groups (33), and the A second power module groups (21) are also connected to A intermediate power module groups (31) in a one-to-one correspondence via A second jumper relay groups (34).

2. The power distribution system according to claim 1, characterized in that: Each of the first power module group (11), the second power module group (21), and the intermediate power module group (31) comprises at least one power module.

3. The power distribution system according to claim 2, characterized in that: The first relay group (12) includes a first positive relay (12a) and a first negative relay (12b), the second relay group (22) includes a second positive relay (22a) and a second negative relay (22b), the intermediate relay group (32) includes an intermediate positive relay (32a) and an intermediate negative relay (32b), the first jumper relay group (33) includes a first jumper positive relay (33a) and a first jumper negative relay (33b), and the second jumper relay group (34) includes a second jumper positive relay (34a) and a second jumper negative relay (34b).

4. A charging pile, characterized in that: Comprising the power distribution system as claimed in claim 3.

5. The charging pile according to claim 4, characterized in that: The charging pile comprises a first mounting plate (41a) and a second mounting plate (41b); the first positive relay (12a), the second positive relay (22a), the middle positive relay (32a), the first jumper positive relay (33a) and the second jumper positive relay (34a) are mounted on the first mounting plate (41a); and the first negative relay (12b), the second negative relay (22b), the middle negative relay (32b), the first jumper negative relay (33b) and the second jumper negative relay (34b) are mounted on the second mounting plate (41b).

6. The charging pile according to claim 5, characterized in that: The first positive relays (12a) are arranged vertically in sequence and are located on one lateral side of the middle positive relay (32a); the second positive relays (22a) are arranged vertically in sequence and are located on the other lateral side of the middle positive relay (32a); the first negative relays (12b) are arranged vertically in sequence and are located on one lateral side of the middle negative relay (32b); the second negative relays (22b) are arranged vertically in sequence and are located on the other lateral side of the middle negative relay (32b); the first positive relays (12a) / the second positive relays (22a) / the first negative relays (12b) / the second negative relays (22b) are connected end to end via a plurality of connecting copper bars (42).

7. The charging pile according to claim 6, characterized in that: The intermediate positive relay (32a) / intermediate negative relay (32b) is connected to A jumper copper bars (43) via a plurality of transfer copper bars (44), and the jumper copper bars (43) are also correspondingly connected to the intermediate power module group (31); the intermediate positive relay (32a) / intermediate negative relay (32b) are arranged in ascending or descending order from top to bottom to form A-1 rows and A-1 columns, and the input ends or output ends of the intermediate positive relays (32a) / intermediate negative relays (32b) located in the same column share a transfer copper bar (44).

8. The charging pile according to claim 7, characterized in that: The first jumper positive relay (33a) is arranged between the first positive relay (12a) and the middle positive relay (32a), and the second jumper positive relay (34a) is arranged between the second positive relay (22a) and the middle positive relay (32a); the first jumper negative relay (33b) is arranged between the first negative relay (12b) and the middle negative relay (32b), and the second jumper negative relay (34b) is arranged between the second negative relay (22b) and the middle negative relay (32b); the first jumper positive relay (33a) and the second jumper positive relay (34a) and the The first jumper negative pole relay (33b) and the second jumper negative pole relay (34b) are connected correspondingly via the jumper copper busbar (43); the first jumper positive pole relay (33a) / the second jumper positive pole relay (34a) / the first jumper negative pole relay (33b) / the second jumper negative pole relay (34b) are arranged vertically in sequence and are led outwardly horizontally via a plurality of output copper busbars (45) and overlapped with the corresponding connecting copper busbars (42); a pad (46) is provided at the bottom of the first jumper positive pole relay (33a) / the second jumper positive pole relay (34a) / the first jumper negative pole relay (33b) / the second jumper negative pole relay (34b).

9. The charging pile according to claim 8, characterized in that: The first mounting plate (41a), the first positive relay (12a), the second positive relay (22a), the intermediate positive relay (32a), the first jumper positive relay (33a), the second jumper positive relay (34a), and the matching connecting copper bar (42), the transfer copper bar (44), the jumper copper bar (43), and the output copper bar (45) form a first mounting module; the second mounting plate (41b), the first negative relay (12b), the second negative relay (22b), the intermediate negative relay (32b), the first jumper negative relay (33b), the second jumper negative relay (34b), and the matching connecting copper bar (42), the transfer copper bar (44), the jumper copper bar (43), and the output copper bar (45) form a second mounting module; the first mounting module and the second mounting module have the same structure.

10. The charging pile according to claim 9, characterized in that: The charging pile further comprises a cabinet (4), wherein the first installation module and the second installation module are installed in the cabinet (4); the first power module group (11), the second power module group (21) and the intermediate power module group (31) are arranged in the cabinet (4) and located above the first installation module and the second installation module, and are correspondingly connected to each output copper bus (45) and the jumper copper bus (43) through a tail plug harness (491).

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