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CN-224224924-U - Power distribution device and charging system

CN224224924UCN 224224924 UCN224224924 UCN 224224924UCN-224224924-U

Abstract

The application discloses a power distribution device and a charging system, comprising one or two power conversion devices, wherein the power distribution device comprises M controllable switches, each power conversion device comprises 9 power units, M is equal to 12 under the condition that the number of the power conversion devices is 1, each power unit is connected with other power units through the controllable switches, M is equal to 24 under the condition that the number of the power conversion devices is 2, and at least one power unit in one power conversion device is connected with the power unit in the other power conversion device through the controllable switches. The application can solve the technical problem of how to realize flexible distribution of each power unit while ensuring the minimum usage amount of the controllable switch when expanding the ultra-large power distribution device.

Inventors

  • WEI JIANRONG
  • ZHAO CONG
  • WEI HAO
  • LIU QIANG

Assignees

  • 领充新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20250610

Claims (10)

  1. 1. A power distribution apparatus, comprising: one or two power conversion devices; the power distribution device comprises M controllable switches, and each power conversion device comprises 9 power units; Wherein, M is equal to 12 in the case of 1 power conversion device, each power unit is connected with other power units through controllable switches, M is equal to 24 in the case of 2 power conversion devices, and at least one power unit in one power conversion device is connected with a power unit in the other power conversion device through controllable switches.
  2. 2. The power distribution apparatus according to claim 1, wherein in the case of 1 power conversion apparatus, 9 power units in the power conversion apparatus form a first totally-enclosed loop path, a first in-loop path, and a first out-of-loop path, respectively, each power unit being connected to other power units through at most 2 power units; The first power unit, the second power unit, the third power unit, the ninth power unit, the eighth power unit and the seventh power unit are connected into the first totally-enclosed annular path through controllable switches in sequence; the seventh power unit is connected with the ninth power unit through a controllable switch to form the first external loop path; The fifth power unit is connected with the sixth power unit, the fourth power unit and the eighth power unit through controllable switches to form a first sub-path, the sixth power unit is connected with the first power unit through controllable switches to form a second sub-path, the fourth power unit is connected with the third power unit through controllable switches to form a third sub-path, and the first sub-path, the second sub-path and the third sub-path form the first ring inner path.
  3. 3. The power distribution apparatus according to claim 1, wherein in the case where the number of the power conversion apparatuses is 2, two of the power conversion apparatuses include a first power conversion apparatus and a second power conversion apparatus, and the topologies of the first power conversion apparatus and the second power conversion apparatus are identical.
  4. 4. A power distribution apparatus as claimed in claim 3, wherein four power cells in the first power conversion apparatus are connected to four power cells in the second power conversion apparatus by controllable switches, each power cell being connected to the other power cells by at most 4 power cells.
  5. 5. The power distribution apparatus of claim 4 wherein 9 power cells in the first and second power conversion apparatuses form a second fully closed loop path and a second in loop path, respectively; The first power unit, the second power unit, the third power unit, the fourth power unit, the ninth power unit, the eighth power unit, the seventh power unit and the sixth power unit are connected into the second totally-enclosed annular path through controllable switches in sequence; the fifth power unit is connected with the second power unit and the eighth power unit through controllable switches to form a path in the second ring.
  6. 6. The power distribution apparatus as claimed in claim 4, wherein, The third power unit in the first power conversion device is connected with the first power unit in the second power conversion device through a controllable switch; the sixth power unit in the first power conversion device is connected with the sixth power unit in the second power conversion device through a controllable switch; The fourth power unit in the first power conversion device is connected with the fourth power unit in the second power conversion device through a controllable switch; the ninth power unit in the first power conversion device is connected with the seventh power unit in the second power conversion device through a controllable switch.
  7. 7. The power distribution apparatus according to claim 1, wherein the power conversion apparatus includes a plurality of charging gun connection interfaces for connecting charging guns, and the number of charging guns is equal to or less than the number of power units.
  8. 8. The power distribution apparatus according to claim 1, wherein the power unit is an ac-dc conversion unit for converting ac power into dc power and outputting dc power.
  9. 9. The power distribution apparatus of claim 1 wherein the controllable switch comprises: at least one of a contactor, a relay, and/or a solid state switch.
  10. 10. A charging system, comprising: The power distribution apparatus of any of claims 1-9, at least two power modules, a controller, and at least one charging interface, the power distribution apparatus being respectively connected to a controller, each of the power modules, and each of the charging interfaces, the controller being communicatively connected to the controllable switch; the power module is used for converting alternating current of a power grid into direct current and providing the direct current to the charging interface; the controller is used for acquiring the required power of each charging interface and generating a scheduling instruction according to the connection relation of the controllable switch in the power distribution device and each required power; The power distribution device is used for controlling the opening or closing of the controllable switch according to the scheduling instruction so as to distribute the output power of each power module to each charging interface.

Description

Power distribution device and charging system Technical Field The application relates to the technical field of power supply of new energy vehicles, in particular to a power distribution device and a charging system. Background Along with the sudden increase of the number of new energy automobiles and the popularization of renewable energy sources, optimizing the layout of a power distribution device and a charging system becomes more important, and is important for improving the convenience of electric traffic, promoting green travel and constructing a sustainable traffic ecological system. However, when designing the power distribution device and the charging system, since the power distribution device needs to be expanded to a high power, the power distribution device is compatible with the use of the minimum controllable switch number, and each unit in the power distribution device is more flexibly distributed, and a conflict exists between the power distribution device and the charging system. Disclosure of utility model The application mainly aims to provide a power distribution device and a charging system, and aims to solve the technical problem that when the power distribution device with ultra-high power is expanded, the minimum usage amount of a controllable switch cannot be ensured, and meanwhile, flexible distribution of each power unit is realized. In order to achieve the aim, the application provides a power distribution device which comprises one or two power conversion devices, wherein the power distribution device comprises M controllable switches, each power conversion device comprises 9 power units, M is equal to 12 when the number of the power conversion devices is 1, each power unit is connected with other power units through the controllable switches, M is equal to 24 when the number of the power conversion devices is 2, and at least one power unit in one power conversion device is connected with the power unit in the other power conversion device through the controllable switches. Optionally, in the case that the number of the power conversion devices is 1, 9 power units in the power conversion devices respectively form a first totally-enclosed annular path, a first annular path and a first annular path, each power unit is connected with other power units through at most 2 power units, wherein the first power unit, the second power unit, the third power unit, the ninth power unit, the eighth power unit and the seventh power unit are sequentially connected into the first totally-enclosed annular path through controllable switches, the seventh power unit is connected with the ninth power unit through controllable switches to form the first annular path, the fifth power unit is connected with a sixth power unit through controllable switches to form a first sub-path, the sixth power unit is connected with the first power unit through controllable switches to form a second sub-path, the fourth power unit is connected with the third power unit through controllable switches to form a third sub-path, and the first sub-path, the second sub-path and the third sub-path form the first annular path. Optionally, in the case that the number of the power conversion devices is 2, the two power conversion devices include a first power conversion device and a second power conversion device, and the topologies of the first power conversion device and the second power conversion device are the same. Optionally, four power units in the first power conversion device and four power units in the second power conversion device are correspondingly connected through controllable switches, and each power unit is connected with other power units through at most 4 power units. Optionally, 9 power units in the first power conversion device and the second power conversion device respectively form a second totally-enclosed annular path and a second annular path, wherein the first power unit, the second power unit, the third power unit, the fourth power unit, the ninth power unit, the eighth power unit, the seventh power unit and the sixth power unit are sequentially connected with each other through controllable switches to form the second totally-enclosed annular path, and the fifth power unit is respectively connected with the second power unit and the eighth power unit through controllable switches to form the second annular path. Optionally, the third power unit in the first power conversion device is connected with the first power unit in the second power conversion device through a controllable switch, the sixth power unit in the first power conversion device is connected with the sixth power unit in the second power conversion device through a controllable switch, the fourth power unit in the first power conversion device is connected with the fourth power unit in the second power conversion device through a controllable switch, and the ninth power unit in the first power conversion device is connected with th