Power distribution device and charging pile

Abstract

The utility model discloses a power distribution device and a charging pile, and relates to the technical field of power electronics. The power distribution device comprises at least two power distribution units. In the power distribution unit, a corresponding power transmission branch is connected between each input end and each output end. Besides, at least two power distribution units exist, and the input ends of the power distribution units are correspondingly connected to the same power modules in parallel, so that the power modules can be connected with the corresponding charging guns through the corresponding power distribution units, and the number of the charging guns is expanded; and / or at least two power distribution units exist, and the output ends of the power distribution units are correspondingly connected to the same charging guns in parallel, so that the charging guns can be connected with the corresponding power modules through the corresponding power distribution units, and the number of the power modules is expanded. In other words, the number of the power modules and the number of the charging guns can be conveniently expanded, and the expansion cost is low.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a power distribution device and a charging pile. Background Art

[0002] With the increasing popularity of electric vehicle charging stations, high-power charging stations are becoming increasingly common, and these high-power charging stations require high-power PDUs (Power Distribution Units). Traditional PDUs typically adopt a one-input, multiple-output (PIMO) or multiple-input, one-output (MIPO) structure. PIMO refers to a PDU that can handle one power module input and multiple charging connector outputs, while MIPO refers to a PDU that can handle multiple power module inputs and one charging connector output.

[0003] When a PDU uses a one-input, multiple-output structure, the number of power modules can be easily expanded, but the number of charging cables cannot be expanded. When a PDU uses a multiple-input, one-output structure, the number of charging cables can be easily expanded, but the number of power modules cannot be expanded. Therefore, the current expansion of power modules or charging cables is limited, making it inconvenient to design the entire charging station system, and the expansion solution is costly. Utility Model Content

[0004] In view of the above problems, this application provides a power distribution device and charging pile to reduce the difficulty and cost of expanding power modules and charging guns. The specific solution is as follows:

[0005] The first aspect of the present application provides a power distribution device, comprising: at least two power distribution units; wherein,

[0006] The power distribution unit includes: a controller, n input terminals, m output terminals, and a plurality of power transmission branches; n is an integer greater than 1, and m is an integer greater than 1;

[0007] Each input terminal and each output terminal of the power distribution unit are respectively connected to a corresponding power transmission branch; the on and off of each power transmission branch is respectively controlled by the controller;

[0008] There are at least two of the power distribution units, and each input end thereof is respectively connected in parallel to the same power module; and / or there are at least two of the power distribution units, and each output end thereof is respectively connected in parallel to the same charging gun.

[0009] In a possible implementation, there are at least two power distribution units, each input end of which is connected to a different power module, or each output end of which is connected to a different charging gun.

[0010] In a possible implementation, the power distribution unit further includes: a housing;

[0011] The controller and each of the power transmission branches are arranged inside the housing;

[0012] The input end and the output end of the power distribution unit both include plug-in terminals arranged outside the shell.

[0013] In a possible implementation, the power distribution unit further includes: at least one plug-in guide device disposed outside the housing;

[0014] The power distribution unit is moved along the plug-in guide device to align the plug-in position with another power distribution unit.

[0015] In a possible implementation, the power distribution unit further includes: at least one plug-in handle;

[0016] The plug-in handle is fixedly arranged on the power distribution unit, and at least a part of the handle is arranged outside the shell.

[0017] In a possible implementation, the power distribution unit further includes: a communication terminal;

[0018] The communication terminal is arranged outside the housing;

[0019] The communication terminal is connected to the controller.

[0020] In a possible implementation, different power distribution units are connected to the input end of the same power module and are connected in parallel via a copper busbar;

[0021] Different power distribution units are connected to the output end of the same charging gun and are connected in parallel through a copper busbar.

[0022] In a possible implementation, the power transmission branch includes: a positive transmission branch and a negative transmission branch;

[0023] The positive transmission branch is provided with a switch, and / or the negative transmission branch is provided with a switch;

[0024] Each switch is controlled by the controller.

[0025] In a possible implementation, the power distribution unit further includes: a plurality of drive circuits;

[0026] The controller realizes on-off control of the corresponding power transmission branch respectively through each of the driving circuits.

[0027] In a possible implementation, the power distribution unit further includes: a plurality of feedback circuits;

[0028] The controller obtains feedback information on the on / off status of the corresponding power transmission branch through each feedback circuit.

[0029] In a first aspect, the present application provides a charging pile, comprising: a main power distribution control unit, at least two power modules, at least two charging guns, and a power distribution device as described in the first aspect or any implementation form of the first aspect; wherein,

[0030] The output end of the power module is connected to the corresponding input end of the power distribution device;

[0031] The input end of the charging gun is connected to the corresponding output end of the power distribution device;

[0032] The power distribution device is in communication with the main power distribution control unit.

[0033] By means of the above technical solution, the power distribution device provided by the present application includes at least two power distribution units; each power distribution unit includes: a controller, n input terminals, m output terminals and multiple power transmission branches; in the power distribution unit, a corresponding power transmission branch is connected between each input terminal and each output terminal, and the on and off of each power transmission branch is controlled by the controller. In addition, there are at least two power distribution units, each of which corresponds to a parallel connection to the same power module; furthermore, these power modules can be connected to the corresponding charging guns through the corresponding power distribution units to achieve the expansion of the number of charging guns; and / or, there are at least two power distribution units, each of which corresponds to a parallel connection to the same charging gun; furthermore, these charging guns can be connected to the corresponding power modules through the corresponding power distribution units to achieve the expansion of the number of power modules. That is, the present application can conveniently expand the number of power modules and charging guns. Moreover, since each power distribution unit can achieve n inputs and m outputs, the expansion of m charging guns can be achieved by connecting the input ends of a power distribution unit in parallel, and the expansion of n power modules can be achieved by connecting the output ends of a power distribution unit in parallel, and the expansion cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the originals and elements are not necessarily drawn to scale.

[0035] Figure 1A schematic diagram of the structure of a power distribution unit provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of a specific structure of a power distribution unit provided in an embodiment of the present application;

[0037] Figure 3 for Figure 2 The external structure diagram of the power distribution unit shown;

[0038] Figure 4 For two Figure 3 The structure shown is a schematic diagram of the structure when each input terminal is connected in parallel;

[0039] Figure 5 For two Figure 3 The structure shown is a schematic diagram of the structure when each output terminal is connected in parallel;

[0040] Figure 6 For three Figure 3 A schematic diagram of a structure in which the input terminals are connected in parallel and the output terminals are connected in parallel;

[0041] Figure 7 A schematic diagram of the external structure of a power distribution unit provided in an embodiment of the present application;

[0042] Figure 8 A three-dimensional schematic diagram of the external structure of the power distribution unit provided in an embodiment of the present application;

[0043] Figure 9 Another schematic perspective view of the external structure of the power distribution unit provided in an embodiment of the present application;

[0044] Figure 10 A schematic diagram of a group of transmission branches of a power distribution unit provided in an embodiment of the present application;

[0045] Figure 11 A schematic diagram of another set of transmission branches of the power distribution unit provided in an embodiment of the present application;

[0046] Figure 12 This is a schematic diagram of the equivalent structure of the power distribution unit provided in the embodiment of the present application;

[0047] Figure 13 For y Figure 12 The structure shown is a schematic diagram of an equivalent structure when each output terminal is connected in parallel;

[0048] Figure 14 A schematic diagram of the structure of the charging pile provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] The following describes the embodiments of the present application in conjunction with the accompanying drawings. The terms used in the implementation methods of the present application are only used to explain the specific embodiments of the present application and are not intended to limit the present application.

[0050] The embodiments of the present application are described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. It is known to those of ordinary skill in the art that with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0051] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, and this is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0052] The embodiment of the present application provides a power distribution device to reduce the difficulty and cost of expanding power modules and charging guns. The specific solution is as follows:

[0053] The power distribution device comprises: at least two power distribution units; wherein the structure of the power distribution unit is as follows Figure 1 As shown in , it includes: a controller 201, n input terminals, m output terminals and multiple power transmission branches 202; n is an integer greater than 1, m is an integer greater than 1, and the values ​​of the two are not limited.

[0054] like Figure 1As shown in FIG, a corresponding power transmission branch 202 is connected between each input terminal and each output terminal of the power distribution unit 20, that is, there are a total of n×m power transmission branches 202 in the power distribution unit 20; the n input terminals of the power distribution unit 20 are used to connect to a corresponding power module 10 among the n power modules (such as power module #1 to power module #n in the figure), and the m output terminals of the power distribution unit 20 are used to connect to a corresponding charging gun 30 among the m charging guns (such as charging gun #1 to charging gun #m in the figure); that is, a corresponding power transmission branch 202 is provided between each power module 10 and each charging gun 30. In addition, the on / off of each power transmission branch 202 is controlled by the controller 201.

[0055] That is, each power distribution unit 20 supports n power modules 10 input and m charging guns 30 output, which can realize n-input and m-output full matrix power distribution. Compared with the traditional solution of one input and multiple outputs, Figure 1 The structure shown can reduce the traditional solution to expand to access n power modules 10 when each output end between n PDUs to achieve corresponding parallel copper bus and plug-in terminals; compared with the traditional solution of multiple inputs and one output, Figure 1 The structure shown can reduce the number of copper bars and plug-in terminals connected in parallel between the input terminals of m PDUs when the traditional solution is extended to connect m charging guns 30. In addition, the traditional solution requires n PDUs with one input and multiple outputs or m PDUs with multiple inputs and one output to achieve n-input and m-output power distribution; Figure 1 The structure shown can realize n-input and m-output full matrix power distribution with one power distribution unit 20, thus reducing the number of power distribution units 20. Figure 1 The structure shown can reduce the overall volume of the power distribution function device in the charging pile while reducing the number of copper bars, plug-in terminals and power distribution units 20.

[0056] Figure 2 In the example, n=m=4 is used for demonstration, but the actual application is not limited to this. Figure 2 PM1 to PM4 refer to four power modules 10, GUN1 to GUN4 refer to four charging guns 30, and GUN1-in to GUN4-in refer to the input terminals of the four charging guns 30. Figure 2 As shown in , if the current when the power transmission branch 202 is turned on is i, the maximum current flowing into each charging gun 30 is i*4. Figure 3 Yes Figure 2 The input and output ends of the power distribution device are shown in FIG. 1 . In actual applications, the input and output ends of the power distribution device can also be arranged outside the power distribution device in other forms. Figure 3The above is only an optional example and is not intended to limit the present application.

[0057] With the increase in power density, especially the popularization of supercharging stations, the number of power modules 10 and charging guns 30 will increase; therefore, in this embodiment, it is provided that: there are at least two power distribution units 20, each input end of which is respectively connected in parallel to the same power module 10; and / or, there are at least two power distribution units 20, each output end of which is respectively connected in parallel to the same charging gun 30.

[0058] Figure 4 exist Figure 3 On the basis of, two power distribution units 20 are connected in parallel to the same power module 10 through their respective input terminals as an example for demonstration; Figure 4 As shown in the figure, the first input end of the power distribution unit #1 and the first input end of the power distribution unit #2 are connected in parallel to the same power module 10, namely PM1, the second input end of the power distribution unit #1 and the second input end of the power distribution unit #2 are connected in parallel to the same power module 10, namely PM2, the third input end of the power distribution unit #1 and the third input end of the power distribution unit #2 are connected in parallel to the same power module 10, namely PM3, and the fourth input end of the power distribution unit #1 and the fourth input end of the power distribution unit #2 are connected in parallel to the same power module 10, namely PM4. Figure 4 The structure shown can use 4 power modules (PM1 to PM4 as shown in the figure) 10 to provide power to 8 charging guns (GUN1 to GUN8 as shown in the figure) 30, that is, the power distribution device can achieve 4 inputs and 8 outputs; under this structure, the maximum power that each charging gun 30 can output is the sum of the powers of all power modules (PM1 to PM4 as shown in the figure) 10. At this time, the output powers of other charging guns 30 are all zero.

[0059] Figure 4 This is only a demonstration of a connection relationship when two power distribution units 20 are connected in parallel to four identical power modules 10 through their respective input terminals. In actual applications, the two input terminals connected in parallel to the same power module 10 can be input terminals at any position in each power distribution unit 20, and are not limited to two input terminals at the same position; for example, Figure 4 The first input end of the power distribution unit #1 and the second input end of the power distribution unit #2 can also be connected in parallel to PM1, the second input end of the power distribution unit #1 and the first input end of the power distribution unit #2 can be connected in parallel to PM2, and so on; as long as the corresponding power distribution units 20 are respectively connected to the same multiple power modules 10, the specific connection relationship can depend on the specific application environment, which is within the protection scope of this application.

[0060] In practical applications, the number of power distribution units 20 connected in parallel to the input terminals is not limited and may be greater than 2. For example, x Figure 1 When the power distribution unit 20 is connected in parallel to the same power module 10 via the input terminals, the power distribution device can achieve n-input x×m-output, where x is an integer greater than 1.

[0061] Figure 5 exist Figure 3 On the basis of, two power distribution units 20 are connected in parallel to the same charging gun 30 through their respective output ends as an example for demonstration; Figure 5 As shown in the figure, the first output end of power distribution unit #1 and the first output end of power distribution unit #2 are connected in parallel to the same charging gun 30, namely GUN1, the second output end of power distribution unit #1 and the second output end of power distribution unit #2 are connected in parallel to the same charging gun 30, namely GUN2, the third output end of power distribution unit #1 and the third output end of power distribution unit #2 are connected in parallel to the same charging gun 30, namely GUN3, and the fourth output end of power distribution unit #1 and the fourth output end of power distribution unit #2 are connected in parallel to the same charging gun 30, namely GUN4. Figure 5 The structure shown can use 8 power modules (PM1 to PM8 as shown in the figure) 10 to provide power to 4 charging guns (GUN1 to GUN4 as shown in the figure) 30, that is, the power distribution device can achieve 8 inputs and 4 outputs; under this structure, the maximum power that each charging gun 30 can output is the sum of the powers of all power modules (PM1 to PM8 as shown in the figure) 10. At this time, the output powers of other charging guns 30 are all zero.

[0062] Figure 5 It is only a demonstration of a connection relationship when two power distribution units 20 are connected in parallel to the same charging gun 30 through each output end. In actual application, the two output ends connected in parallel to the same charging gun 30 can be the output ends at any position in each power distribution unit 20, and are not limited to the two output ends at the same position; as long as the corresponding power distribution units 20 are respectively connected to the same multiple charging guns 30, the specific connection relationship can depend on the specific application environment, which is within the protection scope of this application.

[0063] In practical applications, the number of power distribution units 20 connected in parallel to the output ends is not limited and can be greater than 2. For example, y Figure 1 When the power distribution unit 20 shown is connected in parallel to the same charging gun 30 via the respective output terminals, the power distribution device can achieve y×n input and m output, where y is an integer greater than 1.

[0064] In one example, between different power distribution units 20, there may also be a situation where each input end is connected in parallel and each output end is connected in parallel; that is, Figure 4 and Figure 5 The structure can be combined with the application, for example, see Figure 6 Power distribution unit #1 and power distribution unit #2 are connected in parallel to the same power module (PM1 to PM4 in the figure) 10 via their respective input terminals, and power distribution unit #2 and power distribution unit #3 are connected in parallel to the same charging gun (GUN5 to GUN8 in the figure) 30 via their respective output terminals. In this structure, the maximum power that each charging gun 30 in GUN1 to GUN4 can output is the sum of the powers of PM1 to PM4, at which point the output power of the other charging guns 30 is zero. The maximum power that each charging gun 30 in GUN5 to GUN8 can output is the sum of the powers of PM1 to PM8, at which point the output power of the other charging guns 30 is zero.

[0065] for Figure 4 and Figure 5 The combined application of the two parallel forms shown does not limit the number of power distribution units 20 involved in each of the two parallel forms; as long as there are at least two power distribution units 20 in all the power distribution units 20, their input ends are respectively connected to different power modules 10, or their output ends are respectively connected to different charging guns 30; that is, as long as the input ends and output ends of not all the power distribution units 20 are respectively connected in parallel, the expansion of at least one of the power modules 10 and the charging guns 30 can be achieved.

[0066] Through any combination of the power distribution units 20, a full matrix power distribution system with a greater number of power modules 10 inputs and / or a greater number of charging guns 30 outputs can be formed on the basis of the n-in and m-out power distribution units 20; moreover, the copper busbars and plug-in terminals can be greatly reduced, and the overall volume of the power distribution device can be reduced.

[0067] In the power distribution device provided in this embodiment, when at least two power distribution units 20 are connected in parallel to the same power module 10 via their respective input terminals, these power modules 10 can be connected to corresponding charging guns 30 via the corresponding power distribution units 20, thereby expanding the number of charging guns 30. Furthermore, when at least two power distribution units 20 are connected in parallel to the same charging gun 30 via their respective output terminals, these charging guns 30 can be connected to corresponding power modules 10 via the corresponding power distribution units 20, thereby expanding the number of power modules 10. In other words, this embodiment facilitates expansion of the number of power modules 10 and charging guns 30. Furthermore, since each power distribution unit 20 can implement n inputs and m outputs, expansion to m charging guns 30 can be achieved by connecting the input terminals of one power distribution unit 20 in parallel, and expansion to n power modules 10 can be achieved by connecting the output terminals of one power distribution unit 20 in parallel, resulting in low expansion costs.

[0068] In addition, the power distribution device is realized by combining the power distribution units 20. When any power distribution unit 20 fails, the power distribution unit 20 can be maintained separately without having to maintain or replace the entire power distribution device, which can reduce the difficulty and cost of maintenance.

[0069] On the basis of the previous embodiment, this embodiment exemplifies the specific implementation of the power distribution device. For example, the power distribution unit 20 can be as follows: Figure 7 As shown in , it also includes: a housing 211; Figure 1 and Figure 2 The controller 201 and the power transmission branches 202 shown in FIG. 2 are all disposed inside the housing 211 .

[0070] Moreover, the input end of the power distribution unit 20 includes a plug-in terminal 212 disposed outside the housing 211 ; the output end of the power distribution unit 20 includes a plug-in terminal 213 disposed outside the housing 211 .

[0071] It is understandable that there is no limit on the number of the two plug terminals 212 and 213. Figure 7 In the figure, four plug-in terminals 212 (only one of the plug-in terminals 212 is marked) and eight plug-in terminals 213 (only one of the plug-in terminals 213 is marked) are used as examples for demonstration. In actual applications, the number of the two can be set according to environmental requirements.

[0072] Assumptions Figure 7 is a side view of the power distribution unit 20, then Figures 3 to 6 It can be understood as a right view of the power distribution unit 20.

[0073] The connection between different power distribution units 20 can be achieved through copper busbars or cables. For example, different power distribution units 20 connected to the input of the same power module 10 can be connected in parallel through copper busbars. Different power distribution units 20 connected to the output of the same charging gun 30 can also be connected in parallel through copper busbars. In actual applications, the corresponding plug-in terminals of two corresponding power distribution units 20 can be connected with copper busbars or cables, and all of these are within the scope of protection of this application.

[0074] The pluggable design of the power distribution unit 20 makes system maintenance more convenient, reduces maintenance costs and time, and improves system operating efficiency. Moreover, each power distribution unit 20 in the power distribution device can achieve n input and m output, which can significantly reduce the use of copper bars and plug-in terminals, reducing the overall cost of the system.

[0075] In another example, the power distribution unit 20 may further include Figure 7 As shown in: at least one ( Figure 7 The plug-in guide device 214 is shown as an example in the figure); the plug-in guide device 214 can slide in the corresponding slot, thereby realizing the control of the plug-in direction of the power distribution unit 20.

[0076] Figure 8 FIG2 is a perspective view of the power distribution unit 20, wherein the plug-in guide 214 is provided on the edge of one side thereof and extends outward. In this case, the power distribution device may include a fixing frame, on which each power distribution unit 20 may be placed. In this case, the fixing frame may be provided with a plurality of slots, each corresponding to a plurality of power distribution units 20. Figure 8 Taking the direction shown in as an example, when placing the power distribution unit 20, its plug-in guide device 214 can be inserted into the corresponding slot and slid back and forth along the slot until it slides to a suitable position.

[0077] In practical applications, in order to make the power distribution unit 20 slide more smoothly and be placed more stably, the number of its plug-in guide devices 214 can be increased; Figure 9 As shown in an optional example, the number of the plug-in guide device 214 is 2, and they are respectively arranged at the top and bottom of the power distribution unit 20; in this case, the fixing frame is respectively provided with slots at the top and bottom of the power distribution unit 20; in addition, as shown in FIG. Figure 9As shown in FIG, the two plug-in guides 214 can be respectively provided on different sides of the power distribution unit 20, but the present invention is not limited thereto. In practical applications, the number, position, and shape of the plug-in guides 214 can be determined according to the application environment, as long as the plug-in and plug-out direction control function of the power distribution unit 20 can be achieved.

[0078] In another example, the power distribution unit 20 may further include Figures 7 to 9 As shown in: At least one ( Figure 7 The plug-in handle 215 is fixedly provided on the power distribution unit 20, and at least a part of it is provided on the outside of the shell 211, so that the operator can push and pull the power distribution unit 20 by holding the plug-in handle 215, thereby moving the power distribution unit 20.

[0079] This embodiment combines multiple multi-input and multi-output power distribution units 20, which can not only conveniently meet the power distribution requirements of high-power charging piles, but also achieve convenient plugging and unplugging during maintenance.

[0080] In another example, the power distribution unit 20 may further include Figure 7 As shown in: communication terminal 216; the communication terminal 216 is provided outside the housing 211, and the communication terminal 216 is connected to the Figure 1 and Figure 2 The controller 201 shown in the figure is connected, and the outer side of the communication terminal 216 can be connected to other devices for communication, so that the controller 201 can communicate with other devices, such as the main power distribution control unit in the charging pile and / or the controller 201 in another power distribution unit 20.

[0081] In actual applications, the controller 201 in each power distribution unit 20 can be respectively connected to the master power distribution control unit through the corresponding communication terminal 216. In addition, the communication terminal 216 can be connected to the master power distribution control unit through CAN or other communication methods, so that the controller 201 can receive the control signal of the master power distribution control unit, and verify the correctness of the signal sent by the master power distribution control unit based on the control signal, and perform on-off control of each power transmission branch 202.

[0082] In order to realize the on-off control of each power transmission branch 202, Figure 1 The power transmission branch 202 shown in the figure may specifically include: a positive transmission branch and a negative transmission branch; specifically, a switch is provided in the positive transmission branch, and / or a switch is provided in the negative transmission branch; Figure 2 Only one transmission branch is shown in the figure.

[0083] When corresponding switches are provided in both the positive and negative transmission branches, there are two completely symmetrical groups of transmission branches between the n power modules 10 and the m charging guns 30, one of which includes n×m positive transmission branches and the other includes n×m negative transmission branches. Figure 10 Taking n=4 as an example, the structure of 4×m positive electrode transmission branches is demonstrated. Figure 11 Taking n=4 as an example, the structure of 4×m negative electrode transmission branches is demonstrated; among them, PM1+ to PM4+ refer to the positive output terminals of the four power modules 10, PM1- to PM4- refer to the negative output terminals of the four power modules 10, GUN1-in+ to GUNm-in+ refer to the positive input terminals of m charging guns 30, and GUN1-in- to GUNm-in- refer to the negative input terminals of m charging guns 30.

[0084] Figure 10 or Figure 11 The set of transmission branches shown includes: 4 DC power input lines, m DC power output lines, and 4×m switches; the 4 DC power input lines are connected to the corresponding poles of the output ends of the 4 power modules 10, and the m DC power output lines are connected to the corresponding poles of the input ends of m charging guns 30. Each DC power input line and each DC power output line can be connected through a corresponding switch.

[0085] Figure 10 and Figure 11 The structure shown can form a pair of completely symmetrical power distribution unit groups. Figure 11 The structure shown can also be used with Figure 10 The structure shown forms a pair of power distribution unit groups with switches only in the positive transmission branch. Figure 10 The structure shown can also be used with the following example when all switches inside it are replaced by connecting wires: Figure 11 The structure shown forms a pair of power distribution unit groups with switches only in the negative transmission branch, all of which are within the scope of protection of this application. The equivalent structures of the power distribution unit groups in the three cases are the same, all as Figure 12 As shown in . Figure 12 PM1 to PM4 refer to four power modules 10 , and GUN1-in to GUNm-in refer to input ends of m charging guns 30 .

[0086] Figure 13 The figure shows that multiple power distribution unit groups are connected in parallel through the output ends of the power distribution unit 20 to form a 4y-input and m-output power distribution device, so that each charging gun 30 can call any power module 10. Figure 13PM1 to PM4y in the figure represent 4y power modules 10, and GUN1-in to GUNm-in represent the input terminals of m charging guns 30. The same applies to situations where n takes other values, and where different power distribution units 20 are connected in parallel via their respective input terminals, and are not further illustrated.

[0087] The switches in each of the aforementioned transmission branches are controlled by the controller 201; by controlling the on and off of each switch, the controller 201 can connect or disconnect the corresponding charging connector 30 and the power module 10. In practical applications, each switch can be a DC contactor, a relay, or other controllable switch, which is not limited here and depends on the specific application environment, and is within the scope of protection of this application.

[0088] In another example, the power distribution unit 20 of the power distribution device may further include: n×m drive circuits; the controller 201 uses each drive circuit to implement on / off control of the corresponding power transmission branch 202. If switches are provided in both the positive and negative transmission branches, the two switches in the positive and negative transmission branches within the same power transmission branch 202 can share the same drive circuit. The specific principles of the drive circuit can be found in the prior art and will not be further described here.

[0089] In another example, the power distribution unit 20 of the power distribution device may further include: n×m feedback circuits; the controller 201 uses each feedback circuit to respectively obtain feedback information on the on / off status of the corresponding power transmission branch 202. For example, when the main contact of a relay serves as the switch in the corresponding power transmission branch 202, the auxiliary contact of the relay will maintain the same state as the main contact. The state of the auxiliary contact can then be collected by the feedback circuit and transmitted to the controller 201, thereby allowing the controller 201 to obtain feedback information on the on / off status of the corresponding power transmission branch 202.

[0090] In this embodiment, the controller 201 can drive the switches in the corresponding power transmission branches 202 through various driving circuits, thereby realizing on-off control of each power transmission branch 202; and can also realize on-off state feedback of each switch through various feedback circuits.

[0091] Another embodiment of the present application further provides a charging pile, such as Figure 14 As shown in , it includes: a main power distribution control unit 40, at least two power modules 10, at least two charging guns 30 and a power distribution device 200 as described in any of the above embodiments; wherein:

[0092] The output end of the power module 10 is connected to the corresponding input end of the power distribution device 200 .

[0093] The input end of the charging gun 30 is connected to the corresponding output end of the power distribution device 200 .

[0094] The power distribution device 200 is in communication with the main power distribution control unit 40 .

[0095] The structure and principle of the power distribution device 200 can be found in the above embodiments and will not be described in detail here.

[0096] The charging pile provided in this embodiment can easily realize the expansion of the power module 10 and the charging gun 30, which is conducive to the system design of the entire pile, can meet the needs of high-power charging piles, and provide a better solution for large-scale power distribution systems; moreover, it is convenient to maintain and has low cost, which can improve the reliability and economy of the system.

[0097] The same or similar parts between the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Ordinary technicians in this field can understand and implement it without making any creative efforts.

[0098] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0099] With respect to the above description of the disclosed embodiments, the features described in the various embodiments in this specification may be interchanged or combined to enable those skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power distribution device, characterized in that: include: At least two power distribution units; wherein, The power distribution unit includes: a controller, n input terminals, m output terminals, and a plurality of power transmission branches; n is an integer greater than 1, and m is an integer greater than 1; Each input terminal and each output terminal of the power distribution unit are respectively connected to a corresponding power transmission branch; the on and off of each power transmission branch is respectively controlled by the controller; There are at least two of the power distribution units, and each input end thereof is respectively connected in parallel to the same power module; and / or there are at least two of the power distribution units, and each output end thereof is respectively connected in parallel to the same charging gun.

2. The power distribution device according to claim 1, characterized in that: There are at least two power distribution units, each input end of which is connected to a different power module, or each output end of which is connected to a different charging gun.

3. The power distribution device according to claim 1, wherein: The power distribution unit further includes: a housing; The controller and each of the power transmission branches are arranged inside the housing; The input end and the output end of the power distribution unit both include plug-in terminals arranged outside the shell.

4. The power distribution device according to claim 3, characterized in that: The power distribution unit further includes: at least one plug-in guide device disposed outside the housing; The power distribution unit is moved along the plug-in guide device to align the plug-in position with another power distribution unit.

5. The power distribution device according to claim 3, characterized in that: The power distribution unit further includes: at least one plug-in handle; The plug-in handle is fixedly arranged on the power distribution unit, and at least a part of the handle is arranged outside the shell.

6. The power distribution device according to claim 3, characterized in that: The power distribution unit further includes: a communication terminal; The communication terminal is arranged outside the housing; The communication terminal is connected to the controller.

7. The power distribution device according to claim 1, characterized in that: Different power distribution units are connected to the input end of the same power module and connected in parallel via a copper busbar; Different power distribution units are connected to the output end of the same charging gun and are connected in parallel through a copper busbar.

8. The power distribution device according to any one of claims 1 to 7, characterized in that: The power transmission branch includes: a positive transmission branch and a negative transmission branch; The positive transmission branch is provided with a switch, and / or the negative transmission branch is provided with a switch; Each switch is controlled by the controller.

9. The power distribution device according to any one of claims 1 to 7, characterized in that: The power distribution unit further includes: a plurality of driving circuits; The controller realizes on-off control of the corresponding power transmission branch respectively through each of the driving circuits.

10. The power distribution device according to any one of claims 1 to 7, characterized in that: The power distribution unit further includes: a plurality of feedback circuits; The controller obtains feedback information on the on / off status of the corresponding power transmission branch through each feedback circuit.

11. A charging pile, characterized in that: include: A main power distribution control unit, at least two power modules, at least two charging guns, and a power distribution device according to any one of claims 1 to 10; wherein, The output end of the power module is connected to the corresponding input end of the power distribution device; The input end of the charging gun is connected to the corresponding output end of the power distribution device; The power distribution device is in communication with the main power distribution control unit.

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