CN115742827A

CN115742827A - Power distribution system, method and charging pile

Info

Publication number: CN115742827A
Application number: CN202211507385.1A
Authority: CN
Inventors: 由浩; 韩迪; 刘强; 卫建荣; 康孝智
Original assignee: Xian Linchr New Energy Technology Co Ltd
Current assignee: Xian Linchr New Energy Technology Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-07

Abstract

The application provides a power distribution system, a power distribution method and a charging pile, wherein the power distribution system comprises a first power module, a second power module and a charging pile, wherein the first power module comprises a plurality of first power units which are sequentially and electrically connected through a power switch module respectively and form a totally-enclosed or semi-enclosed structure in a surrounding mode; and the second power module comprises one end of each second power unit which is electrically connected with one first power unit through the power switch module, and the other end of each second power unit is electrically connected with one second power unit or one first power unit through the power switch module. According to the charging system, the plurality of first power units are sequentially electrically connected to form the power output port, the second power unit is electrically connected with the first power units or the second power units respectively to form the power output port, so that the requirement of the charging system for increasing the charging power module can be met, the number of power switches can be reduced, the cost of the whole charging system is reduced, and the size is reduced.

Description

Power distribution system and method and charging pile

Technical Field

The application belongs to the technical field of vehicle power supply, and particularly relates to a power distribution system, a power distribution method and a charging pile.

Background

At present, the number of charging vehicles in the market is increasing, and the demand for rapid charging of charging systems (such as charging piles) is also increasing. In order to improve the quick charging capability of the charging pile, a mode of increasing the number of charging power modules and power switches in the charging system is generally adopted.

However, as the number of the charging power modules and the number of the power switches are increased, the cost of the whole charging system is also increased, and the size of the charging system is also increased, which is not favorable for the wide application of the future charging system.

Disclosure of Invention

The application aims to provide a power distribution system, a power distribution method and a charging pile, and aims to solve the problems of high cost and large size of a traditional power distribution system.

In order to achieve the above object, in a first aspect, an embodiment of the present application provides a power distribution system, including a first power module, a second power module, a plurality of power switch modules, and a plurality of power output ports;

the first power module comprises a plurality of first power units which are respectively and electrically connected in sequence through the power switch module and enclose a fully-closed or semi-closed structure;

the second power module comprises a plurality of second power units, the number of the second power units is less than or equal to that of the first power units, one end of each second power unit is electrically connected with one first power unit through the power switch module, and the other end of each second power unit is electrically connected with one second power unit or one first power unit through the power switch module;

at least part of the first power unit and/or part of the second power unit are electrically connected with the power output port through the power switch module respectively.

In another possible implementation manner of the first aspect, a plurality of the first power units are respectively and sequentially electrically connected through the power switch module, and enclose a fully-enclosed structure;

the number of the second power units is equal to that of the first power units, one end of each second power unit is electrically connected with one first power unit through the power switch module, and the other end of each second power unit is electrically connected with one second power unit through the power switch module;

each first power unit is electrically connected with the power output port through the power switch module.

In another possible embodiment of the first aspect, part of the second power units are electrically connected to another second power unit through the power switch module.

In another possible implementation manner of the first aspect, part of the second power units are also electrically connected with two other second power units through the power switch module.

In another possible implementation manner of the first aspect, a plurality of the first power units are respectively and sequentially electrically connected through the power switch module, and enclose a semi-closed structure;

In another possible implementation manner of the first aspect, the semi-closed structure surrounded by the plurality of first power units includes one or more gaps.

the number of the second power units is smaller than that of the first power units, one end of each second power unit is electrically connected with one first power unit through the power switch module, and the other end of each second power unit is electrically connected with the other first power unit through the power switch module;

and part of the first power units and/or part of the second power units are electrically connected with the power output port through the power switch module respectively.

In another possible implementation of the first aspect, the power output port comprises a charging gun.

In another possible embodiment of the first aspect, the power switching module comprises a contactor or a relay.

In a second aspect, an embodiment of the present application provides a power allocation method, including the following steps:

acquiring the number of first ports of power output ports to be used and the second number of power units;

determining a second alternative power cell combination according to the first port number and the second number;

and determining the target power unit combination with the shortest serial path according to the state of the second alternative power unit combination.

In a third aspect, an embodiment of the present application provides a charging pile, including the power distribution system.

Compared with the prior art, the embodiment of the application has the beneficial effects that: according to the power distribution system, the plurality of first power units are electrically connected in sequence to form the power output port, and the second power unit is electrically connected with the first power unit or the second power unit respectively to form the power output port, so that the requirement of the charging system on the increase of the charging power module can be met, the number of power switches can be reduced, the cost of the whole charging system is reduced, and the size of the charging system is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram of a conventional power distribution system;

fig. 2 is a schematic diagram of a first structure of a power distribution system according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a second structure of a power distribution system according to an embodiment of the present application;

fig. 4 is a schematic diagram of a third structure of a power distribution system according to an embodiment of the present application;

fig. 5 is a schematic diagram of a fourth structure of a power distribution system according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a fifth power distribution system according to an embodiment of the present application;

fig. 7 is a first flowchart of a power allocation method according to an embodiment of the present application.

Fig. 8 is a second flowchart of a power allocation method according to an embodiment of the present application;

fig. 9 is a third flowchart of a power allocation method according to an embodiment of the present application.

Description of reference numerals:

100-first power module, 200-second power module, 300-power switch module, 400-power output port.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

At present, along with vehicle that charges constantly increases in quantity in the market, electric automobile fills electric pile in order to improve quick charge ability, constantly increases inside power module and the power switch's of charging quantity, leads to whole cost of filling electric pile constantly to improve, and the volume constantly increases.

Fig. 1 is a schematic structural diagram of a conventional power distribution system. As shown in fig. 1, for example, in a dc charging pile comprising 12 charging power modules and 6 charging guns, a conventional power distribution system generally requires 72 power switches, that is, the number of charging power modules is 12 times the number of charging guns is 6, and a total of 72 power switches are required. Although the power distribution system supports dynamic distribution of all charging power modules, the required number of power switches is large, so that the overall cost of the system is high, the size of the system is large, and the later maintenance cost is increased continuously. In addition, as the power of a single charging power module is increased, the maximum current capacity that the power switch needs to accommodate is also continuously increased, so that the size of the power distribution single board is continuously increased, and the development trend of a future power distribution system cannot be met.

Therefore, the application provides a power distribution system, a plurality of first power units are electrically connected in sequence through power switch modules to form a power output port, and a second power unit is electrically connected with the first power unit or the second power unit respectively to form the power output port, so that the requirement of the charging system on the increase of the charging power modules can be met, the number of power switches can be reduced, the cost of the whole charging system is reduced, and the size is reduced.

The power distribution system provided by the present application is described in an exemplary manner with reference to the accompanying drawings: fig. 2 is a schematic diagram of a first structure of a power distribution system according to an embodiment of the present disclosure. As shown in fig. 2, for convenience of explanation, only the parts related to the present embodiment are shown, and the details are as follows: illustratively, the power distribution system includes a first power module 100, a second power module 200, a plurality of power switch modules 300, and a plurality of power output ports 400.

The first power module 100 includes a plurality of first power units, which are electrically connected in sequence through the power switch module 300, and enclose a fully-closed or semi-closed structure.

The second power module 200 includes a plurality of second power units, the number of the second power units is less than or equal to the number of the first power units, one end of each second power unit is electrically connected to one first power unit through the power switch module 300, and the other end of each second power unit is electrically connected to one second power unit or one first power unit through the power switch module 300.

At least a portion of the first power cells and/or a portion of the second power cells are electrically connected to the power output port through the power switch module 300, respectively.

In this embodiment of the application, each power unit may be a charging power module that converts Alternating current to Direct current (AC/DC), an input end of each power unit is used to be electrically connected to a 380V commercial power, and an output end of each power unit is used to be electrically connected to other power units. In addition, the turning on and off of the power switch module 300 may be controlled using a switch matrix. The purpose of the switch matrix is to control the opening and closing of the circuit. For example, signal switching systems in automatic test equipment are typically composed of two or more matrix switches, interconnected according to various interface standards, to form flexible switching from test resources.

As shown in fig. 2, specifically, the plurality of first power units are respectively and electrically connected in sequence through the power switch module 300, and enclose a fully closed structure.

The number of the second power units is equal to the number of the first power units, one end of each second power unit is electrically connected with one first power unit through the power switch module 300, and the other end of each second power unit is electrically connected with one second power unit through the power switch module 300.

Each first power cell is electrically connected to a power output port through the power switch module 300, respectively.

In an embodiment of the present application, all the first power units are connected end to end through the power switch module 300 to form the first power module 100 in a ring structure, for example, the

first power units

1, 2, 3,4, 5, and 6 in fig. 2, and the first ends of all the first power units are electrically connected to the power output port 400 through one power switch module 300, for example, the power output ports 400 (for example, charging guns) a, B, C, D, E, and F in fig. 2, respectively. Meanwhile, the second terminal of the first power unit is electrically connected to the third terminal of an adjacent one of the first power units through one of the power switch modules 300, and the third terminal of the first power unit is electrically connected to the second terminal of another adjacent one of the first power units through one of the power switch modules 300.

In addition, the first terminals of the second power units (e.g., the

second power units

7, 8, 9, 10, 11, 12) are connected to the fourth terminal of one first power unit through one power switch module 300, and the second terminals of the second power units are electrically connected to the second terminal of another second power unit through one power switch module 300. Thus, in a charging pile comprising 12 charging power modules and 6 charging guns, one charging gun can be divided into 2, 3,4 or 6 power units (including a first power unit and a second power unit) according to needs, for example, the power units which can be divided into charging guns A, B and C in fig. 2 are 1-7-10-4,2-8-11-5,3-9-12-6 respectively. The power distribution system of the embodiment of the application only needs 21 power switch modules, so that the flexible distribution of the power distribution system can be met, and the cost and the size of the power distribution system are effectively reduced.

Fig. 3 is a schematic diagram of a second structure of a power distribution system according to an embodiment of the present application. As shown in fig. 3, for example, a plurality of first power units are electrically connected in sequence through a power switch module 300, and enclose a fully enclosed structure.

Each first power unit is electrically connected to the power output port through the power switch module 300, and some second power units are also electrically connected to another second power unit through the power switch module 400.

In another embodiment of the present application, the second power unit 7 may further be electrically connected to the second power unit 11 through the power switch module 300, and the second power unit 8 may further be electrically connected to the second power unit 12 through the power switch module 300, so that under the condition that two power switch modules 300 are added, the scheduling capability of a maximum of 8 power units of the charging gun a or the charging gun B may be implemented, thereby implementing the super-charging function.

Fig. 4 is a schematic structural diagram of a third power distribution system according to an embodiment of the present application. As shown in fig. 4, for example, the plurality of first power units are electrically connected in sequence through the power switch module 300, and enclose a fully-enclosed structure.

Each first power unit is electrically connected to the power output port through the power switch module 300, and some second power units are also electrically connected to two other second power units through the power switch module.

In another embodiment of the present application, the second power unit 7 may further be electrically connected to the second power unit 8 and the second power unit 12 through the power switch modules 300, so that under the condition that two power switch modules 300 are added, the scheduling capability of the maximum 8 power units of the charging gun a or the charging gun B may be implemented, thereby implementing the function of super charging.

Fig. 5 is a schematic diagram of a fourth structure of a power distribution system according to an embodiment of the present application. As shown in fig. 5, the plurality of first power units are electrically connected in sequence through the power switch module 400, and enclose a semi-closed structure.

The number of the second power units is equal to the number of the first power units, one end of each second power unit is electrically connected with one first power unit through the power switch module 400, and the other end of each second power unit is electrically connected with one second power unit through the power switch module 400.

Each first power cell is electrically connected to a power output port through the power switch module 400, respectively.

In another embodiment of the present application, a first terminal of a first power unit is electrically connected to a power output port 400 through a power switch module 300, and a second terminal of a part of the first power units is electrically connected to a third terminal of an adjacent first power unit through a power switch module 300. The difference from the embodiment of fig. 2 is mainly that the wiring between the first power units 1 and 6 and the power switch module 300 are reduced, and the wiring between the first power units 3 and 4 and the power switch module 300 are reduced, so that in a charging pile comprising 12 charging power modules and 6 charging guns, the power distribution system of the embodiment of the present application only needs 19 power switch modules, and not only can flexible distribution of the power distribution system be satisfied, but also the cost and the volume of the power distribution system are further reduced.

As shown in fig. 5, the semi-closed structure surrounded by the plurality of first power units exemplarily includes one or more gaps.

In another embodiment of the present application, the difference from the embodiment of fig. 2 is mainly that a semi-closed structure surrounded by a plurality of first power units can selectively disconnect two first power units or a plurality of first power units according to actual situations, thereby reducing the usage of the power switch module 300 in the power distribution system, enhancing the flexibility of the power distribution system, and reducing the cost and the volume of the power distribution system.

As shown in fig. 2, 3,4, and 5, the power output port 400 illustratively includes a plurality of charging guns, one charging gun electrically connected to one first power cell.

In this embodiment, the power output port 400 includes charging guns a, B, C, D, E, and F, and the charging guns a, B, C, D, E, and F are respectively connected to the

first power units

1, 2, 3,4, 5, and 6, so that the electric energy collected by the

first power units

1, 2, 3,4, 5, and 6 is respectively output to the vehicle through the charging guns a, B, C, D, E, and F for charging.

Fig. 6 is a schematic structural diagram of a fifth power distribution system according to an embodiment of the present application. As shown in fig. 6, for example, the plurality of first power units are electrically connected in sequence through the power switch module 300, and enclose a fully-enclosed structure.

The number of the second power units is smaller than that of the first power units, one end of each second power unit is electrically connected with one first power unit through the power switch module 300, and the other end of each second power unit is electrically connected with the other first power unit through the power switch module 300.

Part of the first power units and/or part of the second power units are electrically connected with the power output port through the power switch module 300, respectively.

In another embodiment of the present application, 6 charging guns and 12 power units are included, that is, in addition to the

first power units

1, 3, 5, and 7 electrically connected to the power switch module 300 to form a plurality of power output ports 400 (i.e., charging guns a, B, C, and D), the

second power units

9 and 11 are also electrically connected to the power switch module 300 to form a plurality of power output ports 400 (i.e., charging guns E and F), so that the flexibility of the power distribution system can be satisfied without increasing the power switch module 300, and the power distribution system can be equally divided by 2, 3,4, and 6 charging gun outputs.

As shown in fig. 6, the power output port 400 illustratively includes a plurality of charging guns.

A charging gun is electrically connected to a second power unit.

In the embodiment of the present application, in fig. 6, the power output port 400 includes charging guns E and F, which are correspondingly connected to the

second power units

9 and 11, respectively, so that the electric energy collected by the

second power units

9 and 11 is output to the vehicle through the charging guns E and F, respectively, for charging. In addition, based on the embodiment shown in fig. 2, all the

second power units

7, 8, 9, 10, 11, 12 may be electrically connected to the charging gun, so as to achieve a power distribution capability of up to 12 charging guns.

Illustratively, the power switch module 300 includes a contactor or a relay.

In the embodiment of the present application, the power switch module 300 generally includes two power switches, i.e., a contactor or a relay, etc., for respectively controlling the conduction and the shutdown between the first power unit and the second power unit.

Fig. 7 is a first flowchart of a power allocation method according to an embodiment of the present application. As shown in fig. 7, the present embodiment discloses a power allocation method, which includes the following steps:

s101, obtaining a first number of power units which need to be distributed by a power output port.

And S102, determining a first alternative power unit combination according to the first quantity.

And S103, determining target power unit combinations meeting the first quantity according to the states of the first candidate power unit combinations.

In the embodiment of the present application, each power output port 400 has a unique identifier, each power unit also has a unique identifier, and each power output port 400 calls the required number of power units based on the identifier of the power unit. Based on the power distribution system in the embodiment of fig. 2, according to the distribution method based on the principle of maximum utilization of power units, a first number (for example, 4 power units) of a first power unit and a second power unit that need to be distributed to a power output port 400 (for example, a charging gun a) is obtained, and a first candidate power unit combination (for example, a first distribution matrix including all distribution modes) is determined according to that 4 power units need to be distributed to the charging gun a, as shown in table 1 below:

table 1 charging gun a first distribution matrix for distributing 4 power cells

Then verifying whether the power units in the distribution mode are available one by one according to the first distribution matrix, for example, when the power unit 7 is unavailable, the power unit 2 needs to be distributed to the charging gun A; if power unit 2 is still unavailable, it is necessary to assign power unit 6 to gun a, which can be verified one by one from top to bottom for each group and from left to right within a group. Until finding the distribution mode (i.e. the distribution mode capable of utilizing the maximum 4 power units) meeting the matching requirement of the charging gun A, and finally confirming the distribution scheme.

Illustratively, the power allocation method further includes:

and determining the number of the power units which can be distributed to each power output port according to the using state of the power output port and the number of all the power units.

In this embodiment of the application, based on the power distribution system in the embodiment of fig. 2, according to a distribution method based on a maximum power unit utilization principle, a first number (e.g., 4 power units, respectively) of power units that need to be distributed by a first power output port (e.g., a charging gun a) and a second power output port (e.g., a charging gun B) may be obtained, and a first candidate power unit combination (e.g., a first distribution matrix including all distribution modes) is determined according to that 4 power units need to be distributed by the charging gun a and the charging gun B, respectively. And verifying one by one according to the first distribution matrix until a distribution mode meeting the requirements of all power output ports is found, namely determining target power unit combinations meeting the first quantity according to the state of the first alternative power unit combinations. For example, there are 12 power units in the power distribution system, and when only one charging gun needs to distribute a power unit, all 12 power units can be distributed to the charging gun. When two guns that charge need distribute power unit, can give two guns that charge 6 guns that charge respectively. When three guns that charge need distribute power unit, can distribute 4 guns that charge respectively for three guns that charge. When four guns that charge need distribute power unit, can distribute 3 guns that charge respectively for two guns that charge.

Fig. 8 is a second flowchart of a power allocation method provided in an embodiment of the present application, and as shown in fig. 8, for example, the present embodiment discloses a power allocation method, which includes the following steps:

s201, acquiring the first port number of the power output ports to be used and the second number of the power units.

And S202, determining a second alternative power unit combination according to the first port number and the second number.

And S203, determining the target power unit combination with the shortest serial path according to the state of the second alternative power unit combination.

In the embodiment of the present application, based on the power distribution system in the embodiment of fig. 2, according to the distribution method based on the principle of minimum investment of power switch modules, under the condition of the same number of charging guns and the same number of power units, the distribution manner of each charging gun may have multiple routes, but if the number of power switch modules passing through is less, the current passing through the last power switch module is smaller, which is beneficial to the type selection and the life of the power switch module. For example, taking charging gun a as an example, when charging guns a, B, and C are plugged at the same time, there are various distribution modes for charging gun a, some of which need to pass through three power switch modules, such as: the charging guns A are 1, 7, 4 and 10, the charging guns B are 2, 8, 11 and 5, and the charging guns C are 3, 9,12 and 6, and in the distribution mode, each energy gathered by the charging guns needs to pass through 3 power switch modules before reaching the corresponding first power unit, namely the last power switch module needs to bear the output current of the previous 3 power units.

Some distribution methods need to pass through two power switch modules, such as: the charging guns A:1, 6, 7 and 10, the charging guns B:2, 5, 8 and 11, and the charging guns C:3,4,9 and 12 can equally divide 12 power units, but the charging guns A and the charging guns C are respectively provided with 3 power units at two branches, so that the power switch modules connected with the first power unit and the charging gun A only need to bear the output current of 2 power units at most. On the premise that 3 charging guns can be equally divided into 12 power units, the distribution formula is more favorable for the type selection and the service life of the power switch module.

Fig. 9 is a third flowchart of a power allocation method according to an embodiment of the present application. As shown in fig. 9, for example, the present embodiment discloses a power allocation method, which includes the following steps:

s301, acquiring the number of second ports of the currently occupied power output ports and the third number of power units corresponding to all the power output ports.

S302, the number of third ports of the power output ports occupied after adjustment is obtained, and a third alternative power unit combination is determined according to the number of the third ports and the third number.

And S303, determining a target power unit combination corresponding to the power output port occupied after adjustment according to the third alternative power unit combination and the use state of the power unit.

In the embodiment of the application, according to the distribution method based on the principle that the influence of the power distribution system is minimum when the charging gun is newly added, for the power distribution system which is well distributed and is in the charging process, the phenomena that some charging guns are charging and some charging guns stop charging can occur. When the number of charging guns needs to be increased or decreased, power distribution needs to be performed again, and if the distribution mode in the former charging scenario needs to stop most of the power units or even all the power units in the new charging scenario, and then restart the power units according to the distribution mode in the new charging scenario, the power distribution will affect the user vehicle being charged. Since all power units require time to stop and start, if a large drop in output power occurs, the drop in output power will affect the charging experience of the user even if the power is restored later.

In another embodiment of the present application, based on the power distribution system in the embodiment of fig. 2, first, the second port number of the currently occupied power output ports and the third numbers of the first power unit and the second power unit corresponding to all the power output ports are obtained. For example, the currently occupied power output port includes charging guns a, B, and C, all of which correspond to 12 power units, that is, each charging gun may correspond to 4 power units, respectively, and when the charging guns a, B, and C are charging simultaneously. And then acquiring the number of third ports of the adjusted occupied power output port, for example, the number of charging guns D needs to be increased for use, and 4 charging guns are adjusted. And determining a third alternative power unit combination (for example, a third distribution matrix comprising all distribution modes) according to the third port number (namely 4 charging guns) and the third number (namely 12 power units), namely, dividing the 4 charging guns into 12 power units in the moment to obtain the third distribution matrix comprising all distribution modes. The best distribution is that the charging guns a, B, C only exit one end power unit to support, which has minimal impact on the overall power distribution system. If one or more charging guns need to stop 2 or 3 power units and then recall the other 3 power units, the output of one or more charging guns is greatly reduced and then gradually recovered, and therefore the charging experience of a user is affected.

For example, at present, three charging guns A, B and C work, the charging guns A:1, 6, 7 and 10, the charging guns B:2, 8, 11 and 5 and the charging guns C:3,4,9 and 12 work, and the charging gun D starts to work at the moment, and various distribution modes can be provided. Wherein, the circuit 1 is: charging guns A:1, 6 and 5, charging guns B:2, 8 and 11, charging guns C:3, 9 and 12 and charging guns D:4, 7 and 10. The circuit 2 is: charging guns A are 1, 6 and 7, charging guns B are 2, 8 and 11, charging guns C are 3, 9 and 12, and charging guns D are 4, 5 and 10. For the line 1, the charging gun a needs to stop two power units 7 and 10, and then restart the power unit 5, and for the line 2, the charging gun a only needs to stop the power unit 10, so that under the same condition of satisfying the power unit sharing, the influence of the line 2 on the charging gun a in charging is the smallest, and the power output curve of the charging gun a changes the slightest and the change rate is the smallest, so that the charging experience of the user is influenced less.

Illustratively, a charging post includes a power distribution system.

In the embodiment of the application, the power distribution system is arranged in the charging pile, the first power units are sequentially and electrically connected through the power switch modules to form the power output ports, and the second power units are respectively and electrically connected with the first power units or the second power units to form the power output ports, so that the requirement of the charging system for increasing the charging power modules can be met, the number of the power switches can be reduced, meanwhile, the cost of the whole charging system is reduced, and the size is reduced.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed power distribution system may be implemented in other ways. For example, the above-described power distribution system embodiments are merely illustrative, and for example, a division of modules or units is merely a logical division, and an actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. A power distribution system comprising a first power module, a second power module, a plurality of power switch modules, and a plurality of power output ports;

the first power module comprises a plurality of first power units which are respectively and sequentially electrically connected through the power switch module and enclose a fully-closed or semi-closed structure;

2. The power distribution system of claim 1, wherein a plurality of the first power units are electrically connected in sequence through the power switch modules, respectively, and enclose a fully enclosed structure;

3. The power distribution system of claim 2, wherein some of the second power cells are also electrically connected to another of the second power cells through the power switch module.

4. The power distribution system of claim 2, wherein some of the second power cells are also electrically connected to two other of the second power cells through the power switch module.

5. The power distribution system of claim 1, wherein a plurality of the first power cells are electrically connected in sequence through the power switch modules, respectively, and enclose a semi-enclosed structure;

6. The power distribution system of claim 5, wherein the semi-enclosed structure defined by the plurality of first power cells includes one or more notches.

7. The power distribution system of claim 1, wherein a plurality of the first power units are electrically connected in sequence through the power switch modules, respectively, and enclose a fully enclosed structure;

8. The power distribution system of any of claims 1-7, wherein the power output port comprises a charging gun.

9. A power distribution method using the power distribution system according to any one of claims 1 to 8, comprising the steps of:

and determining the target power unit combination with the shortest series path according to the state of the second alternative power unit combination.

10. A charging pile comprising a power distribution system according to any one of claims 1 to 8.