CN218616266U

CN218616266U - Power distribution system of direct current charging equipment

Info

Publication number: CN218616266U
Application number: CN202223014725.5U
Authority: CN
Inventors: 李锦鹏; 马君; 刘长波; 费康达; 叶圣民; 马震宇; 方剑星
Original assignee: Acrel Co Ltd; Jiangsu Acrel Electrical Manufacturing Co Ltd
Current assignee: Acrel Co Ltd; Jiangsu Acrel Electrical Manufacturing Co Ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-03-14
Anticipated expiration: 2032-11-14

Abstract

The utility model relates to a power distribution system of direct current charging equipment, which comprises at least two groups of charging modules, a charging terminal and a power distribution device, wherein the power distribution device is respectively connected between the charging modules and the charging terminal, and the charging modules are connected with a power grid; the power distribution device comprises a plurality of power distribution units, each power distribution unit comprises an input port, a first switch module and an output port, each group of charging modules is connected with one input port, the output ports are connected with charging terminals, and a group of first switch modules are connected between the input ports and the output ports in series. The utility model discloses the distribution mode is simple nimble, and the module of charging can provide output for arbitrary rifle, and distribution system is more reliable.

Description

Power distribution system of direct current charging equipment

Technical Field

The utility model relates to a direct current battery charging outfit technical field especially relates to a direct current battery charging outfit's power distribution system.

Background

Along with new forms of energy electric automobile's development, electric automobile's specification model and brand are various, and all kinds of brands and motorcycle types are diversified to the demand of charging, and demand diverse such as power, voltage, the electric current that electric automobile charges, and the same platform truck in the charging process also real-time change of demand of charging in the charging process state of difference (electric current, power), the idle problem of charging device charge capacity often appears in the charging process.

In the prior art, for example, chinese patent CN114374240A discloses a power distribution system of a dc charging device and a dc charging device, each group of power modules is separated by a relay, common output or individual output of multiple groups of power modules is realized by switching the relays, and the multiple groups of power modules are connected in parallel to form a ring to realize a power distribution mode, which has the following defects: 1. power maldistribution, example: when the first power module and the third power module output independently, the second power module cannot output together with other power modules; 2. and the anti-interference capability is poor, and when a certain relay fails to close, the power modules on the two sides of the relay cannot be output together with the power module on the other side of the relay.

For example, chinese patent CN108879850B discloses a power distribution apparatus and method, in which multiple sets of power modules are connected to the same power distribution unit, and the power distribution unit includes multiple input ports and one power output port. The power distribution unit selectively closes the relays on the input ports, outputs the corresponding power modules to the power output ports, and achieves common output of the multiple groups of power modules; and then, connecting a plurality of power distribution units in parallel to realize the independent output of a plurality of groups of power modules. The method for realizing power distribution by accessing the power distribution unit has the following defects: 1. the system maintenance cost is high, the power distribution unit is generally used as a unit for design, and when one relay in the power distribution unit is damaged, the whole relay needs to be replaced; 2. the system is complex, the number of internal relays is large, for example, six paths of input are arranged in one power distribution unit, power distribution of six groups of power modules is realized, thirty-six groups of relays are needed, and one hundred forty-four groups of relays are needed for realizing power distribution of twelve groups of power modules.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned not enough, provide a direct current battery charging outfit's power distribution system, solve among the prior art direct current battery charging outfit power distribution inequality, distribution mode scheduling problem not nimble enough.

The purpose of the utility model is realized like this:

a power distribution system of direct current charging equipment comprises at least two groups of charging modules, charging terminals and power distribution devices, wherein the power distribution devices are respectively connected between the charging modules and the charging terminals, and the charging modules are connected with a power grid; the power distribution device comprises a plurality of power distribution units, each power distribution unit comprises an input port, a first switch module and an output port, each group of charging modules is connected with one input port, the output ports are connected with charging terminals, and a group of first switch modules are connected between the input ports and the output ports in series.

Further, the number of the charging terminals is not greater than the number of the charging modules.

Furthermore, each input port and the corresponding output port form an output loop, a group of second switch modules is connected between any two output loops, if there are N output loops, N (N-1)/2 groups of second switch modules are used for connecting all the output loops, N groups of first switch modules are used for closing the output loops, and the first switch modules and the second switch modules 33 together form N + (N-1)/2) groups of modules.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses in realize that the switch module quantity that the same function used significantly reduces, the utility model discloses distribution mode is simple nimble, and the module of charging can provide output for an arbitrary rifle, and distribution system is more reliable, and when a certain switch module trouble can't be closed, only loses the output of a set of module of charging, can make full use of charge capacity, and overall structure is simple and control portably moreover, greatly reduced system cost.

Drawings

Fig. 1 is a system structure diagram of the present invention.

Fig. 2 is a schematic circuit diagram of the power distribution apparatus of the present invention.

Wherein:

the system comprises a power grid 1, a charging module 2, a power distribution device 3, an input port 31, a first switch module 32, a second switch module 33, an output port 34 and a charging terminal 4.

Detailed Description

For better understanding of the technical solution of the present invention, the following detailed description will be made with reference to the accompanying drawings. It should be understood that the following specific examples are not intended to limit the embodiments of the present invention, but only embodiments that can be adopted by the present invention. It should be noted that the description of the positional relationship of the components, such as the component a is located above the component B, is based on the description of the relative positions of the components in the drawings, and is not intended to limit the actual positional relationship of the components.

Example 1:

referring to fig. 1-2, fig. 1 is a schematic diagram of the circuit structure of the present invention. As shown in the figure, the utility model relates to a power distribution system of direct current battery charging outfit, it includes at least two sets of module 2 and the same charge terminal 4 and the power distribution device 3 of the module 2 quantity that charges of charging, power distribution device 3 connect respectively in between module 2 and the charge terminal 4 charge, the module 2 that charges is connected with electric wire netting 1.

The power distribution device 3 comprises a plurality of power distribution units, each power distribution unit comprises an input port 31, a first switch module 32 and an output port 34, each group of charging modules 2 is connected with one input port 31, the output port 34 is connected with the charging terminal 4, and a group of first switch modules 32 is connected between the input port 31 and the output port 34 in series.

Each input port 31 and the corresponding output port 34 form an output loop, a group of second switch modules 33 is connected between any two output loops, if there are N output loops, there are N (N-1)/2 groups of second switch modules 33 for connecting all the output loops, N groups of first switch modules 32 for closing the output loops, and the first switch modules 32 and the second switch modules 33 together form N + (N-1)/2) groups of modules.

The utility model relates to a distribution method of power distribution system of direct current battery charging outfit, including following content:

s1, judging whether no port output exists, if no port output exists, disconnecting all switch modules, and if no port output exists, executing S2;

s2, disconnecting all second switch modules between the output loop and other output loops;

s3, closing a first switch module on the loop;

s4, checking whether the requirements of the output port on the loop are met, if so, finishing distribution, and if not, executing S5;

s5, checking whether other output ports exist or not, if not, ending, and if so, executing S6;

and S6, disconnecting the first switch module on the loop of the output port existing in the S5, disconnecting all the second switch modules connected with the loop, closing the second switch modules connected with the loop of the output port in the S1, and returning to execute the S4.

The working principle is as follows:

the utility model discloses an every input port inserts a set of module of charging, and every input port is connected to output port through switch module, and every output port is connected to a rifle that charges (charging terminal promptly), connects through switch module between the inside per two input ports of device.

At the moment, each input port of the power distribution device can provide output power of a group of charging modules for the output port of the power distribution device, when one output port is not used, a switch module on an output loop of the power distribution device is disconnected, the input port of the power distribution device is connected with any output port which is in short demand through the closed switch module according to needs, and output power of a group of additional charging modules is provided for the output port; the utility model discloses can solve among the prior art DC charging equipment power distribution inequality, distribution mode not enough nimble scheduling problem.

The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All technical solutions formed by adopting equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims

1. A power distribution system for a dc charging device, comprising: the power distribution system comprises at least two groups of charging modules (2), charging terminals (4) and power distribution devices (3), wherein the power distribution devices (3) are respectively connected between the charging modules (2) and the charging terminals (4), and the charging modules (2) are connected with a power grid (1); the power distribution device (3) comprises a plurality of power distribution units, each power distribution unit comprises an input port (31), a first switch module (32) and an output port (34), each group of charging modules (2) is connected with one input port (31), the output ports (34) are connected with charging terminals (4), and a group of first switch modules (32) are connected between the input ports (31) and the output ports (34) in series.

2. The power distribution system of a dc charging apparatus of claim 1, wherein: the number of the charging terminals (4) is not more than that of the charging modules (2).

3. The power distribution system of a dc charging device of claim 1, wherein: each input port (31) and the corresponding output port (34) form an output loop, a group of second switch modules (33) are connected between any two output loops, and if N output loops exist, the number of the output loops is N

The group of second switch modules (33) is used for connecting all the output loops, and the group of N first switch modules (32) is used for closing the output loops.