A power distribution system and charging pile

Abstract

This utility model relates to the field of charging pile technology, specifically to a power distribution system and a charging pile. The power distribution system includes A first power distribution units and B second power distribution units. Each first power distribution unit includes B power module groups, and any two of the B power module groups are connected through a first relay group, where A≥3 and B≥3. Each second power distribution unit includes A connection points, and any two of the A connection points are connected through a second relay group. The A connection points in the nth second power distribution unit are also connected one-to-one with the nth power module group in each first power distribution unit; 1≤n≤B. This utility model's power distribution system, in addition to being able to call any power module group in the first power distribution unit, can also call power module groups in other first power distribution units through the second power distribution units, significantly improving the flexibility of power allocation.

Description

Technical Field

[0001] This utility model relates to the field of charging pile technology, specifically to a power distribution system and a charging pile. Background Technology

[0002] In a charging pile system, a reasonable power allocation scheme can dynamically and flexibly distribute the total available power of the charging pile to multiple charging ports based on the real-time charging needs of different vehicles, the status of the power module, priority, and other factors.

[0003] Figure 1 The structure of a prior art ring power distribution scheme is shown, which includes multiple power modules connected in a ring via relays. Each power module is directly connected to a charging gun. The direct connection means that there is no relay for power distribution between the power module and the corresponding charging gun. When the charging gun is started, the power module must distribute power to the charging gun.

[0004] In this power allocation scheme, a single gun can call modules from either the left or right side. However, the calling stops when a power module is occupied by its directly connected gun. This power allocation scheme has many bottlenecks, resulting in situations where there are remaining power modules that cannot be called, leading to low utilization. For example... Figure 1 The structure shown includes 6 power modules M1~M6, 6 sets of relays K1~K6, and 6 charging guns 1~6. Assuming that when gun 1 needs charging, it first calls its directly connected power module M1. If the power is insufficient, it can call power modules M6 or M2 on the left and right sides by closing relays K6 or K1 on either side of power module M1. However, when gun 6 is charging, power module M6, as a directly connected module, must be allocated to gun 6. If gun 1 is connected to power module M6 at this time, it will cause a short circuit, so gun 1 can only call the right-side power module M2. However, if gun 2 also starts charging, gun 1 can only call one power module M1 and cannot call other idle power modules.

[0005] Figure 2 The structure of a full matrix power distribution scheme in the prior art is shown. It adds a diagonal connection unit to the ring power distribution scheme. In addition to connecting to the power modules on the left and right sides through relays, each power module can also connect to any other power module through relays. This solves the problem in the ring power distribution scheme that a single gun can only call the power modules on the left and right sides and cannot call other power modules. At this time, each gun can call the power module point-to-point to achieve full matrix distribution and maximize the flexibility of distribution.

[0006] Among existing power distribution schemes, the ring power distribution scheme, although using fewer relays and having lower costs, has too many power distribution bottlenecks and poor distribution flexibility; while the full matrix power distribution scheme, although having high distribution flexibility, requires a large number of relays and has high costs. Utility Model Content

[0007] This invention addresses the technical problems of excessive power distribution bottlenecks or high costs in existing power distribution schemes by providing a power distribution system and charging pile that reduces costs while ensuring high power distribution flexibility.

[0008] The technical solution adopted in this utility model is as follows: A power distribution system, comprising: There are A first power distribution units, each of which includes B power module groups. Any two of the B power module groups are connected through a first relay group, where A≥3 and B≥3. There are B second power distribution units, each of which includes A connection points. Any two of the A connection points are connected through a second relay group. The A connection points in the nth second power distribution unit are also connected one-to-one with the nth power module group in each first power distribution unit; where 1≤n≤B.

[0009] Furthermore, the power distribution system also includes several output terminals, each of which is connected to all or part of the power module group.

[0010] Furthermore, the power distribution system includes B output terminals, each of which is connected to one of the connection points in one of the B second power distribution units.

[0011] Furthermore, the power module group may include a single power module or multiple power modules connected in parallel.

[0012] Furthermore, the first relay group includes a first positive relay and a first negative relay, the first positive relay being connected to the positive terminal of the corresponding power module, and the first negative relay being connected to the negative terminal of the corresponding power module; the connection point includes a positive connection point and a negative connection point, the positive connection point being connected to the positive terminal of the corresponding power module, and the negative connection point being connected to the negative terminal of the corresponding power module; the second relay group includes a second positive relay and a second negative relay, the second positive relay being connected to the corresponding positive connection point, and the second negative relay being connected to the corresponding negative connection point.

[0013] Furthermore, the output terminal includes a positive output terminal and a negative output terminal, the positive output terminal being connected to the positive terminal of the corresponding power module, and the negative output terminal being connected to the negative terminal of the corresponding power module.

[0014] In another aspect, this utility model provides a charging pile, including the power distribution system as described in any of the above.

[0015] Furthermore, the charging pile includes a rectifier cabinet and multiple terminals, and the second power distribution unit is configured within the rectifier cabinet and / or the terminals.

[0016] Furthermore, the charging pile includes a rectifier cabinet and multiple terminals, and the charging pile also includes an independent cabinet, in which the second power distribution unit is configured; or, a portion of the second power distribution unit is configured in the independent cabinet, and another portion is configured in the rectifier cabinet and / or the terminals.

[0017] Furthermore, the first power distribution unit is configured inside the rectifier cabinet.

[0018] The beneficial effects of this utility model are: This invention provides a power distribution system that, during power distribution, the output end can not only call any power module group within its current first power distribution unit, but also bypass this first power distribution unit and call any power module group in other first power distribution units via a second power distribution unit. Compared to a ring power distribution scheme, the power distribution path is increased and bottlenecks are significantly reduced, enabling more flexible power distribution; compared to a full matrix power distribution scheme, the number of relays is reduced, lowering its cost; in other words, this invention's power distribution system reduces costs while maintaining high power distribution flexibility. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the topology of a ring power distribution scheme in the prior art; Figure 2 This is a schematic diagram of the topology of a full-matrix power allocation scheme in the prior art; Figure 3 This is a schematic diagram of the power distribution system according to Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the structure of one of the first power distribution units in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the structure of one of the second power distribution units in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the power distribution system according to Embodiment 2 of this utility model; Figure 7 This is a schematic diagram of the structure of one of the first power distribution units in Embodiment 2 of this utility model; Figure 8 This is a schematic diagram of the structure of one of the second power distribution units in Embodiment 2 of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] This embodiment provides a power distribution system comprising A first power distribution units and B second power distribution units. Each first power distribution unit includes B power module groups, and any two of the B power module groups are connected through a first relay group. A and B are both positive integers, and A ≥ 3, B ≥ 3. Further, each second power distribution unit includes A connection points, and any two of the A connection points are connected through a second relay group. Further, the A connection points in the nth second power distribution unit are also connected one-to-one with the nth power module group in each first power distribution unit; where n is a positive integer, and 1 ≤ n ≤ B.

[0023] like Figure 3-5 As shown, taking the case of A=6 and B=6 as an example, it includes a total of 6 first power distribution units and 6 second power distribution units. The 6 first power distribution units are designated as 1# first power distribution unit, 2# first power distribution unit, 3# first power distribution unit, 4# first power distribution unit, 5# first power distribution unit, and 6# first power distribution unit. Each first power distribution unit includes 6 power module groups and 15 first relay groups. Figure 4Taking the first power distribution unit #1 as an example, the six power module groups are power module groups M1.1, M1.2, M1.3, M1.4, M1.5, and M1.6, and the fifteen first relay groups are K1.1, K1.2, K1.3, K1.4, K1.5, K1.6, K1.7, K1.8, K1.9, K1.10, K1.11, K1.12, K1.13, K1.14, and K1.15. Any two of the six power module groups are connected through one first relay group. The structure of the other five first power distribution units is the same as this first power distribution unit, and they can be implemented with reference to this first power distribution unit. The labeling of each component needs to be adjusted accordingly, which will not be described in detail here.

[0024] Furthermore, the six second power distribution units are designated as Second Power Distribution Unit 1, Second Power Distribution Unit 2, Second Power Distribution Unit 3, Second Power Distribution Unit 4, Second Power Distribution Unit 5, and Second Power Distribution Unit 6. Each second power distribution unit includes six connection points and 15 groups of second relays, to... Figure 5 Taking the No. 1 second power distribution unit as an example, the six connection points are P1.1, P1.2, P1.3, P1.4, P1.5, and P1.6, and the fifteen second relay groups are K1.1', K1.2', K1.3', K1.4', K1.5', K1.6', K1.7', K1.8', K1.9', K1.10', K1.11', K1.12', K1.13', K1.14', and K1.15'. Any two of the six connection points are connected through a second relay group. The structure of the remaining five second power distribution units is the same as this second power distribution unit, and they can be implemented with reference to this second power distribution unit. The labeling of each component needs to be adjusted accordingly, which will not be described in detail here.

[0025] Furthermore, the six connection points in the #1 second power distribution unit are also connected one-to-one to the first power module group in the six first power distribution units; the six connection points in the #2 second power distribution unit are also connected one-to-one to the second power module group in the six first power distribution units; and so on, with the six connection points in the #6 second power distribution unit also connected one-to-one to the sixth power module group in the six first power distribution units. The power module groups in each first power distribution unit are not necessarily ordered according to their numbers; the power module group connected to the connection point in the #n second power distribution unit is its nth power module group.

[0026] It should be noted that, Figure 3 Each of the first power distribution units shown includes a first relay group, and each of the second power distribution units includes a second relay group. Figure 3The diagram has been simplified for illustrative purposes; please refer to the specific structures for details. Figure 4 and Figure 5 Implementation.

[0027] Thus, the power distribution system provided in this embodiment allows output terminals such as the output gun end to not only access any power module group within their current first power distribution unit, but also to bypass this first power distribution unit and access any power module group in other first power distribution units via a second power distribution unit. Compared to a ring power distribution scheme, the power distribution path is increased, and bottlenecks are significantly reduced, enabling more flexible power distribution. Compared to a full matrix power distribution scheme, the number of relays is reduced, lowering costs. In other words, the power distribution system of this embodiment reduces costs while maintaining high power distribution flexibility.

[0028] The power distribution system in this embodiment also includes several output terminals, which are ports used to output electrical energy to the outside. For example, they can be the outlet of a charging pile, used for outputting electrical energy after the charging gun is plugged in. The number and position of the output terminals can be set as needed. For example, the number of output terminals can be A×B, corresponding to... Figure 3 The structure shown has 36 output terminals, each directly connected to a power module group. In other words, each power module group is directly connected to one output terminal. Alternatively, the number of output terminals can be less than A×B, connecting only a portion of all power module groups.

[0029] Preferably, the power distribution system of this embodiment includes B output terminals, each of which is connected to one of the connection points of one of the B second power distribution units, meaning that all output terminals are led out from the second power distribution units. Figure 3 The structure shown has six output terminals, each connected one-to-one to any one of the connection points in one of the six second power distribution units. For example, each output terminal can connect to the first connection point in the upper left corner of each second power distribution unit. In this way, each output terminal can access any power module group in the first power distribution unit through its respective second power distribution unit, eliminating bottlenecks and making power distribution more flexible, achieving fully flexible power allocation.

[0030] In addition to connecting one power module group to another, the output terminals can also be connected in a one-to-many manner, meaning that one output terminal can simultaneously connect to multiple power module groups located in different first power distribution units. In other words, the position and number of the output terminals can be arbitrarily set as needed.

[0031] Furthermore, a power module group may include only one power module; or, a power module group may also include multiple power modules connected in parallel to increase the power of a single power module group.

[0032] Furthermore, since the power module has positive and negative terminals, the first relay group in this embodiment includes a first positive relay and a first negative relay. The first positive relay is connected to the positive terminal of the corresponding power module, and the first negative relay is connected to the negative terminal of the corresponding power module. The connection point includes a positive connection point and a negative connection point. The positive connection point is connected to the positive terminal of the corresponding power module, and the negative connection point is connected to the negative terminal of the corresponding power module. The second relay group includes a second positive relay and a second negative relay. The second positive relay is connected to the corresponding positive connection point, and the second negative relay is connected to the corresponding negative connection point. Similarly, the output terminal includes a positive output terminal and a negative output terminal. The positive output terminal is connected to the positive terminal of the corresponding power module, and the negative output terminal is connected to the negative terminal of the corresponding power module.

[0033] The power allocation system provided in this embodiment can not only call any power module group in the first power allocation unit, but also bypass the current first power allocation unit and call any power module group in other first power allocation units through the second power allocation unit, greatly improving the allocation flexibility.

[0034] Example 2:

[0035] This embodiment provides a power distribution system, including A first power distribution units and B second power distribution units. Each first power distribution unit includes B power module groups, and any two of the B power module groups are connected through a first relay group. A and B are both positive integers, and A ≥ 3, B ≥ 3. Further, each second power distribution unit includes A connection points, and any two of the A connection points are connected through a second relay group. Further, the A connection points in the nth second power distribution unit are also connected one-to-one with the nth power module group in each first power distribution unit; where n is a positive integer, and 1 ≤ n ≤ B.

[0036] The main difference between the power distribution system in this embodiment and that in Embodiment 1 lies in the different values ​​of A and B. Specifically, as follows: Figure 6-8 As shown, in this embodiment, A=4, B=6, comprising a total of 4 first power distribution units and 6 second power distribution units. The 4 first power distribution units are designated as 1# first power distribution unit, 2# first power distribution unit, 3# first power distribution unit, and 4# first power distribution unit. Each first power distribution unit includes 6 power module groups and 15 first relay groups, to... Figure 7Taking the first power distribution unit #1 as an example, the six power module groups are power module groups M1.1, M1.2, M1.3, M1.4, M1.5, and M1.6, and the fifteen first relay groups are K1.1, K1.2, K1.3, K1.4, K1.5, K1.6, K1.7, K1.8, K1.9, K1.10, K1.11, K1.12, K1.13, K1.14, and K1.15. Any two of the six power module groups are connected through one first relay group. The structure of the other three first power distribution units is the same as this first power distribution unit, and they can be implemented with reference to this first power distribution unit. The labeling of each component can be adjusted accordingly, which will not be described in detail here.

[0037] Furthermore, the six second power distribution units are designated as second power distribution unit 1, second power distribution unit 2, second power distribution unit 3, second power distribution unit 4, second power distribution unit 5, and second power distribution unit 6. Each second power distribution unit includes four connection points and six groups of second relays. Figure 8 Taking the No. 1 second power distribution unit as an example, the six connection points are P1.1, P1.2, P1.3, and P1.4, and the six second relay groups are K1.1', K1.2', K1.3', K1.4', K1.5', and K1.6'. Any two of the six connection points are connected through one second relay group. The structure of the other five second power distribution units is the same as this second power distribution unit, and they can be implemented with reference to this second power distribution unit. The labeling of each component can be adjusted accordingly, and will not be described in detail here.

[0038] Furthermore, the four connection points in the #1 second power distribution unit are also connected one-to-one to the first power module group in the four first power distribution units, the four connection points in the #2 second power distribution unit are also connected one-to-one to the second power module group in the four first power distribution units, and so on, the four connection points in the #6 second power distribution unit are also connected one-to-one to the sixth power module group in the four first power distribution units.

[0039] Thus, the power distribution system provided in this embodiment can also achieve the technical effect of high power distribution flexibility and low cost as described in Embodiment 1.

[0040] Furthermore, the power distribution system of this embodiment also includes several output terminals. The specific locations and quantities can be set with reference to Embodiment 1, and will not be detailed here. Each power module group in this embodiment may also include one power module or multiple power modules connected in parallel. Since the power modules in this embodiment have positive and negative terminals, the first relay group also includes a first positive relay and a first negative relay, and the connection points include a positive connection point and a negative connection point. The second relay group includes a second positive relay and a second negative relay, and the output terminals include a positive output terminal and a negative output terminal. The specific connection method is set with reference to Embodiment 1, and will not be detailed here.

[0041] Example 3

[0042] This embodiment provides a charging pile, including the power distribution system described in the above embodiments. The output end is configured as a charging gun outlet, for example, using... Figure 3 When the power distribution system structure shown is configured, the maximum supported system power is 2.88MW, and the single gun can call up 2.88MW of power, which can realize megawatt charging.

[0043] Furthermore, the charging pile in this embodiment is a split-type charging pile, which includes a rectifier cabinet and multiple terminals. The rectifier cabinet can distribute electrical energy to each terminal. The aforementioned first power distribution unit consists of copper busbars and a first relay group, all of which are configured within the rectifier cabinet. The aforementioned second power distribution unit consists of copper busbars and a second relay group, all of which are configured within the rectifier cabinet; or, all of which are configured within the terminals; or, some are configured within the rectifier cabinet and some within the terminals.

[0044] Preferably, the charging pile in this embodiment further includes an independent cabinet located outside the rectifier cabinet and the terminal, and all of the second power distribution units can be configured in the independent cabinet; or, a portion of the second power distribution units can be configured in the independent cabinet, and another portion can be configured in the rectifier cabinet, or in the terminal, or in both the rectifier cabinet and the terminal.

[0045] In other words, the second power distribution unit in this embodiment can be flexibly configured in the rectifier cabinet, independent cabinet, and terminal according to the on-site configuration and usage, which can save a certain amount of space and cost.

[0046] The second power distribution unit can be integrated into an independent unit, especially when all are located in an independent cabinet, its size is relatively small, and it can be directly maintained during maintenance. In contrast, in the existing full matrix distribution scheme, all relays and copper busbars are located in the rectifier cabinet, occupying a large space, and all components need to be disassembled for maintenance, which is inconvenient. In addition, the position and number of output guns in this embodiment can be set as needed. Output guns can be generated from the first power distribution unit or the second power distribution unit. Especially when the second power distribution unit is located in an independent cabinet, the first and second power distribution units are independent. Output guns from the first power distribution unit will not affect the arrangement of the second power distribution unit, and vice versa. In contrast, in the existing full matrix distribution scheme, each power module must be directly connected to one output gun end, and the position and number of output guns are limited, making it impossible to configure arbitrarily as needed.

[0047] In addition to its application in charging piles, the power distribution system described herein can also be applied to other devices that require power distribution in other embodiments, and this utility model does not limit this application.

[0048] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing" and other such terms should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components.

[0050] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

Claims

1. A power distribution system, characterized in that, include: There are A first power distribution units, each of which includes B power module groups. Any two of the B power module groups are connected through a first relay group, where A≥3 and B≥3. There are B second power distribution units, each of which includes A connection points. Any two of the A connection points are connected through a second relay group. The A connection points in the nth second power distribution unit are also connected one-to-one with the nth power module group in each first power distribution unit; where 1≤n≤B.

2. The power distribution system according to claim 1, characterized in that, The power distribution system also includes several output terminals, which are connected one-to-one to all or some of the power module groups.

3. The power distribution system according to claim 2, characterized in that, The power distribution system includes B output terminals, each of which is connected to one of the connection points in one of the B second power distribution units.

4. The power distribution system according to claim 3, characterized in that, The power module group may include one power module or multiple power modules connected in parallel.

5. The power distribution system according to claim 4, characterized in that, The first relay group includes a first positive relay and a first negative relay. The first positive relay is connected to the positive terminal of the corresponding power module, and the first negative relay is connected to the negative terminal of the corresponding power module. The connection point includes a positive connection point and a negative connection point. The positive connection point is connected to the positive terminal of the corresponding power module, and the negative connection point is connected to the negative terminal of the corresponding power module. The second relay group includes a second positive relay and a second negative relay. The second positive relay is connected to the corresponding positive connection point, and the second negative relay is connected to the corresponding negative connection point.

6. The power distribution system according to claim 5, characterized in that, The output terminal includes a positive output terminal and a negative output terminal. The positive output terminal is connected to the positive terminal of the corresponding power module, and the negative output terminal is connected to the negative terminal of the corresponding power module.

7. A charging pile, characterized in that, Includes the power distribution system as described in any one of claims 1-6.

8. The charging pile according to claim 7, characterized in that, The charging pile includes a rectifier cabinet and multiple terminals, and the second power distribution unit is configured in the rectifier cabinet and / or the terminals.

9. The charging pile according to claim 7, characterized in that, The charging pile includes a rectifier cabinet and multiple terminals. The charging pile also includes an independent cabinet, in which the second power distribution unit is configured; or, a portion of the second power distribution unit is configured in the independent cabinet, and another portion is configured in the rectifier cabinet and / or the terminals.

10. The charging pile according to claim 8 or 9, characterized in that, The first power distribution unit is configured inside the rectifier cabinet.

Images