CN-122001039-A - Charging system, charging system control method, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a charging system, a charging system control method, electronic equipment and a storage medium, wherein the charging system comprises a direct current bus, a bidirectional direct current conversion module and at least two direct current source systems, wherein the bidirectional direct current conversion module is used for converting direct current of the direct current source system and outputting the converted direct current to the direct current bus when being switched to be communicated with the direct current bus and one direct current source system, or converting direct current of the direct current bus and outputting the converted direct current to the one direct current source system, and is used for converting direct current of the one direct current source system and outputting the converted direct current to the other direct current source system when being switched to be communicated between the direct current source system and the other direct current source system, so that the bidirectional direct current conversion module can be multiplexed, the utilization rate of each module is improved, and the number of modules in a system architecture is reduced.

Inventors

• LING HEPING
• LIU JUNHUA
• WEN QI
• SHI JIANYONG
• QIN GAI

Assignees

• 比亚迪股份有限公司

Dates

Publication Date

20260508

Application Date

20241030

Claims (20)

1. 1. The charging system is characterized by comprising a direct current bus, a bidirectional direct current conversion module and at least two direct current source systems; the bidirectional direct current conversion module is used for converting direct current of one direct current source system and outputting the converted direct current to the direct current bus when being switched to be communicated with the direct current bus and the direct current source system, or converting direct current of the direct current bus and outputting the converted direct current to the direct current source system, and is used for converting direct current of the one direct current source system and outputting the converted direct current to the other direct current source system when being switched to be communicated between the direct current source system and the other direct current source system.
2. 2. The charging system of claim 1, further comprising an AC-DC conversion module; the alternating current-direct current conversion module is communicated with the direct current bus and the alternating current power system and used for converting alternating current of the alternating current power system into direct current and outputting the direct current to the direct current bus.
3. 3. The charging system of claim 2, further comprising a unidirectional direct current conversion module and a charging terminal; The unidirectional direct current conversion module is communicated with the direct current bus and the charging terminal and is used for converting direct current of the direct current bus and outputting the converted direct current to the charging terminal.
4. 4. The charging system of claim 3, wherein the at least two dc source systems comprise an energy storage system and a photovoltaic system, and the bi-directional dc conversion module comprises a first bi-directional dc conversion module that communicates the dc bus with the energy storage system or the photovoltaic system, or the first bi-directional dc conversion module communicates the energy storage system and the photovoltaic system.
5. 5. The charging system of claim 4, wherein the battery is electrically connected to the battery, When the first bidirectional direct current conversion module is communicated with the energy storage system and the direct current bus, the alternating current power system is used for supplying power to the energy storage system; When the first bidirectional direct current conversion module is communicated with the energy storage system and the direct current bus, the energy storage system is used for supplying power to the charging terminal; When the first bidirectional direct current conversion module is communicated with the photovoltaic system and the direct current bus, the photovoltaic system is used for supplying power to the charging terminal; when the first bidirectional direct current conversion module is communicated with the photovoltaic system and the direct current bus, the photovoltaic system is also used for supplying power to the alternating current power system; When the first bidirectional direct current conversion module is communicated with the photovoltaic system and the energy storage system, the photovoltaic system is used for supplying power to the energy storage system.
6. 6. The charging system of claim 5, wherein the battery is electrically connected to the battery, When the first bidirectional direct current conversion module is communicated with the energy storage system and the direct current bus, the alternating current power system is used for supplying power to the energy storage system through the alternating current direct current conversion module, the direct current bus and the first bidirectional direct current conversion module; or when the first bidirectional direct current conversion module is communicated with the energy storage system and the direct current bus, the energy storage system is used for supplying power to the charging terminal through the first bidirectional direct current conversion module, the direct current bus and the unidirectional direct current conversion module; Or when the first bidirectional direct current conversion module is communicated with the photovoltaic system and the direct current bus, the photovoltaic system is used for supplying power to the charging terminal through the first bidirectional direct current conversion module, the direct current bus and the unidirectional direct current conversion module; or when the first bidirectional direct current conversion module is communicated with the photovoltaic system and the direct current bus, the photovoltaic system is also used for supplying power to the alternating current power system through the first bidirectional direct current conversion module, the direct current bus and the alternating current direct current conversion module; or when the first bidirectional direct current conversion module is communicated with the photovoltaic system and the energy storage system, the photovoltaic system is used for supplying power to the energy storage system through the first bidirectional direct current conversion module.
7. 7. The charging system according to claim 4, further comprising a plurality of breaking devices; the breaking devices are used for communicating the direct current bus, the first bidirectional direct current conversion module, the photovoltaic system and the energy storage system.
8. 8. The charging system of claim 7, wherein the battery is electrically connected to the battery, The plurality of breaking devices are used for communicating the direct current bus with the first bidirectional direct current conversion module, and/or communicating the first bidirectional direct current conversion module with the photovoltaic system or the energy storage system, and/or communicating the photovoltaic system with the energy storage system.
9. 9. The charging system according to claim 8, wherein the plurality of breaking means includes a first breaking means, a second breaking means, a third breaking means and a fourth breaking means; One end of the first breaking device is connected with the direct current bus, and the other end of the first breaking device is connected with the first bidirectional direct current conversion module; One end of the second breaking device is connected with the first bidirectional direct current conversion module, and the other end of the second breaking device is connected with the energy storage system; One end of the third breaking device is connected with the connection point of the second breaking device and the first bidirectional direct current conversion module, and the other end of the third breaking device is connected with the photovoltaic system; and one end of the fourth breaking device is connected with the connection point of the second breaking device and the energy storage system, and the other end of the fourth breaking device is connected with the connection point of the first breaking device and the first bidirectional direct current conversion module.
10. 10. The charging system of claim 9, wherein the battery is electrically connected to the battery, When the fourth breaking device and the third breaking device are disconnected and the second breaking device and the first breaking device are closed, the energy storage system is communicated with the direct current bus through the first bidirectional direct current conversion module; When the fourth breaking device and the second breaking device are disconnected and the third breaking device and the first breaking device are closed, the photovoltaic system is communicated with the direct current bus through the first bidirectional direct current conversion module; When the second breaking device and the first breaking device are disconnected and the fourth breaking device and the third breaking device are closed, the photovoltaic system is communicated with the energy storage system through the first bidirectional direct current conversion module.
11. 11. The charging system of claim 9, wherein the battery is electrically connected to the battery, When the first breaking device and the fourth breaking device are closed, and the second breaking device and the third breaking device are opened, the energy storage system is communicated with the direct current bus, and the energy storage system is used for supplying power to the alternating current power system through the direct current bus and the alternating current-direct current conversion module.
12. 12. The charging system of claim 4, wherein the bi-directional dc conversion module further comprises a second bi-directional dc conversion module, the second bi-directional dc conversion module communicating the dc bus with the energy storage system; the alternating current power system is also used for supplying power to the energy storage system through the alternating current-direct current conversion module, the direct current bus and the second bidirectional direct current conversion module; Or the energy storage system is also used for supplying power to the charging terminal through the second bidirectional direct current conversion module, the direct current bus and the unidirectional direct current conversion module.
13. 13. The charging system of claim 12, wherein the battery is electrically connected to the battery, The alternating current power system is also used for supplying power to the charging terminal through the alternating current-direct current conversion module, the direct current bus and the unidirectional direct current conversion module.
14. 14. The charging system of claim 13, wherein the battery is electrically connected to the battery, When the required power of the charging terminal is greater than or equal to a power threshold, the alternating current power system is used for supplying power to the charging terminal through the alternating current-direct current conversion module, the direct current bus and the unidirectional direct current conversion module, the energy storage system is used for supplying power to the charging terminal through the second bidirectional direct current conversion module, the direct current bus and the unidirectional direct current conversion module, and the photovoltaic system is used for supplying power to the charging terminal through the first bidirectional direct current conversion module, the direct current bus and the unidirectional direct current conversion module; Or when the required power of the charging terminal is greater than or equal to a power threshold, the alternating current power system is used for supplying power to the charging terminal through the alternating current-direct current conversion module, the direct current bus and the unidirectional direct current conversion module, and the energy storage system is used for supplying power to the charging terminal through the first bidirectional direct current conversion module, the direct current bus and the unidirectional direct current conversion module.
15. 15. The charging system of claim 13, wherein the battery is electrically connected to the battery, When the required power of the charging terminal is greater than zero and smaller than the power threshold, the alternating current power system is used for supplying power to the charging terminal through the alternating current-direct current conversion module, the direct current bus and the unidirectional direct current conversion module; Or the energy storage system is used for supplying power to the charging terminal through the second bidirectional direct current conversion module, the direct current bus and the unidirectional direct current conversion module; Or the energy storage system is used for supplying power to the charging terminal through the first bidirectional direct current conversion module, the direct current bus and the unidirectional direct current conversion module; Or the photovoltaic system is used for supplying power to the charging terminal through the first bidirectional direct current conversion module, the direct current bus and the unidirectional direct current conversion module.
16. 16. The charging system of claim 13, wherein the battery is electrically connected to the battery, When the required power of the charging terminal is zero, the alternating current power system is used for supplying power to the energy storage system through the alternating current-direct current conversion module, the direct current bus and the second bidirectional direct current conversion module; or the alternating current power system is used for supplying power to the energy storage system through the alternating current-direct current conversion module, the direct current bus, the first bidirectional direct current conversion module and the second bidirectional direct current conversion module; or the energy storage system is used for supplying power to the alternating current power system through the direct current bus and the alternating current-direct current conversion module; or the photovoltaic system is used for supplying power to the alternating current power system through the first bidirectional direct current conversion module, the direct current bus and the alternating current direct current conversion module; or the photovoltaic system is used for supplying power to the energy storage system through the first bidirectional direct current conversion module.
17. 17. The charging system of claim 3, wherein the dc bus comprises a first dc bus and a second dc bus; The alternating current/direct current conversion module comprises a first direct current bus, a second direct current bus, a first alternating current/direct current conversion module, a second alternating current/direct current conversion module, a first direct current bus and a second direct current bus.
18. 18. The charging system according to claim 17, further comprising fifth breaking means; One end of the fifth breaking device is connected with the first direct current bus, and the other end of the fifth breaking device is connected with the second direct current bus.
19. 19. The charging system of claim 3, further comprising a power distribution module; The power distribution module is communicated with the unidirectional direct current conversion module and the charging terminal and is used for distributing direct current output by the unidirectional direct current conversion module to the charging terminal.
20. 20. A charging system control method, characterized by being applied to a charging system according to claims 1 to 19, the method comprising: Switching a direct current source system to be communicated with the direct current bus through the bidirectional direct current conversion module, and controlling the direct current source system to supply power for an alternating current power system or controlling the alternating current power system to supply power for the direct current source system; or switching one direct current source system to be communicated with another direct current source system through the bidirectional direct current conversion module, and controlling the one direct current source system to supply power for the other direct current source system.

Description

Charging system, charging system control method, electronic equipment and storage medium Technical Field The present invention relates to the field of charging technologies, and in particular, to a charging system, a charging system control method, an electronic device, and a storage medium. Background With the rapid development of new energy industries, for example, the popularity of new energy products such as electric automobiles is increasing, and the demand for energy such as electric energy is also increasing. In order to meet the increasing charging demands of electric vehicles, more charging devices need to be arranged. The charging system of the charging device mainly comprises charging circuits such as an alternating current power system and a direct current source system, and the voltage of each charging circuit is output after being converted by an AC-DC module (a direct current-alternating current conversion module for converting alternating current into direct current) and/or a DC-DC module (a direct current conversion module for converting a direct current source from one voltage level to another voltage level). However, in the charging system of the prior art, a dedicated DC-DC module is provided for each direct current source system, resulting in a low utilization rate of the DC-DC module. Disclosure of Invention In order to solve the problems, the embodiment of the invention discloses a charging system, a charging system control method, electronic equipment and a storage medium. In a first aspect, an embodiment of the present invention provides a charging system, including a dc bus, a bidirectional dc conversion module, and at least two dc source systems; the bidirectional direct current conversion module is used for converting direct current of one direct current source system and outputting the converted direct current to the direct current bus when being switched to be communicated with the direct current bus and the direct current source system, or converting direct current of the direct current bus and outputting the converted direct current to the direct current source system, and is used for converting direct current of the one direct current source system and outputting the converted direct current to the other direct current source system when being switched to be communicated between the direct current source system and the other direct current source system. Optionally, the system also comprises an alternating current-direct current conversion module; the alternating current-direct current conversion module is communicated with the direct current bus and the alternating current power system and used for converting alternating current of the alternating current power system into direct current and outputting the direct current to the direct current bus. Optionally, the charging system also comprises a unidirectional direct current conversion module and a charging terminal; The unidirectional direct current conversion module is communicated with the direct current bus and the charging terminal and is used for converting direct current of the direct current bus and outputting the converted direct current to the charging terminal. Optionally, the at least two direct current source systems comprise an energy storage system and a photovoltaic system, the bidirectional direct current conversion module comprises a first bidirectional direct current conversion module, the first bidirectional direct current conversion module is communicated with the direct current bus and the energy storage system or the photovoltaic system, or the first bidirectional direct current conversion module is communicated with the energy storage system and the photovoltaic system. Optionally, when the first bidirectional dc conversion module communicates the energy storage system with the dc bus, the ac power system is configured to supply power to the energy storage system; When the first bidirectional direct current conversion module is communicated with the energy storage system and the direct current bus, the energy storage system is used for supplying power to the charging terminal; When the first bidirectional direct current conversion module is communicated with the photovoltaic system and the direct current bus, the photovoltaic system is used for supplying power to the charging terminal; when the first bidirectional direct current conversion module is communicated with the photovoltaic system and the direct current bus, the photovoltaic system is also used for supplying power to the alternating current power system; When the first bidirectional direct current conversion module is communicated with the photovoltaic system and the energy storage system, the photovoltaic system is used for supplying power to the energy storage system. Optionally, when the first bidirectional direct current conversion module is connected to the energy storage system and the direct current bus, the alternating current power