US-20260128596-A1 - PLANT POWER SUPPLY SYSTEM

Abstract

A plant power supply system includes a power conversion system and a busbar box, where the busbar box is provided with a direct current (DC) busbar, the power conversion system being connected to the DC busbar, and the DC busbar being further connected to an electrical device, where the power conversion system is configured to convert alternating current (AC) power input from an external AC power source into DC power; and the DC busbar is configured to transmit the DC power to the electrical device, and receive discharge energy from the electrical device and return the discharge energy to the electrical device.

Inventors

• Jiawei WANG
• Bo Zeng
• Zhiyong Zhang

Assignees

• CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Dates

Publication Date

20260507

Application Date

20260107

Priority Date

20230713

Claims (11)

1. 1 . A plant power supply system, comprising a power conversion system and a busbar box, wherein the busbar box is provided with a direct current (DC) busbar, the power conversion system being connected to the DC busbar, and the DC busbar being further connected to an electrical device, wherein the power conversion system is configured to convert alternating current (AC) power input from an external AC power source into DC power; and the DC busbar is configured to transmit the DC power to the electrical device, and receive discharge energy from the electrical device and return the discharge energy to the electrical device.
2. 2 . The plant power supply system according to claim 1 , wherein the busbar box is further provided with a DC circuit breaker, the DC circuit breaker being connected between the power conversion system and the DC busbar.
3. 3 . The plant power supply system according to claim 1 , wherein the busbar box is further provided with an electrical device circuit breaker, the electrical device circuit breaker being connected between the DC busbar and the electrical device.
4. 4 . The plant power supply system according to claim 1 , wherein the power conversion system comprises a main power conversion system and a backup power conversion system, and the busbar box is further provided with a switching circuit breaker, the switching circuit breaker being connected to each of the main power conversion system, the backup power conversion system, and the electrical device, wherein the switching circuit breaker is configured to, when the main power conversion system fails, disconnect a connection between the main power conversion system and the electrical device, and connect the backup power conversion system to the electrical device.
5. 5 . The plant power supply system according to claim 4 , wherein a plurality of main power conversion systems, a plurality of busbar boxes, and a plurality of electrical devices are provided, and one backup power conversion system is provided, wherein each of the main power conversion systems is connected to one of the electrical devices through a switching circuit breaker in a corresponding one of the busbar boxes; and the backup power conversion system is connected to each of the plurality of the electrical devices through a switching circuit breaker in a respective one of the plurality of busbar boxes.
6. 6 . The plant power supply system according to claim 1 , wherein the busbar box further comprises an electrical device interface, the electrical device interface being connected to the electrical device.
7. 7 . The plant power supply system according to claim 6 , wherein the electrical device comprises a plurality of electrical units, each of the electrical units being connected to the DC busbar through the electrical device interface.
8. 8 . The plant power supply system according to claim 1 , wherein a power adaptation coefficient between the power conversion system and the electrical device is within a range of 0.3 to 0.7.
9. 9 . The plant power supply system according to claim 1 , wherein the electrical device comprises at least one of a capacity testing machine and a cell formation machine.
10. 10 . The plant power supply system according to claim 1 , wherein the electrical device comprises a capacity grading cabinet, the capacity grading cabinet being connected to the DC busbar in the busbar box.
11. 11 . The plant power supply system according to claim 10 , wherein the capacity grading cabinet is provided with a control chip and a battery cell, the control chip being configured to receive a feedback signal from the battery cell, and control a charging and discharging process and a charging and discharging current based on the feedback signal.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a continuation of International Application No. PCT/CN2024/072833, filed on Jan. 17, 2024, which claims priority to Chinese Patent Application No. 202310861128.6, filed on Jul. 13, 2023, and entitled “PLANT POWER SUPPLY SYSTEM”, the entire contents of each are incorporated herein by reference. TECHNICAL FIELD The present application relates to the technical field of battery manufacturing and, in particular, to a plant power supply system. BACKGROUND With the development of new energy technology, batteries are being used in more and more fields. For example, batteries are used to construct energy storage systems, and batteries are used as power for new energy vehicles. In battery production lines, there are battery manufacturing devices, testing devices, and cell formation devices, and the like. Currently, how to supply power to testing devices and cell formation devices, etc., has become a technical problem that urgently needs to be solved. SUMMARY OF THE DISCLOSURE Based on the aforementioned problem, the present application provides a plant power supply system, which can effectively supply power to electrical devices, and can reduce costs and shorten the installation and commissioning cycle. The present application provides a plant power supply system. The plant power supply system includes a power conversion system and a busbar box, where the busbar box is provided with a direct current (DC) busbar, the power conversion system being connected to the DC busbar, and the DC busbar being further connected to an electrical device, where the power conversion system is configured to convert alternating current (AC) power input from an external AC power source into DC power; and the DC busbar is configured to transmit the DC power to the electrical device, and receive discharge energy from the electrical device and return the discharge energy to the electrical device. In the technical solution of the embodiments of the present application, a power conversion system is adopted to convert AC power into DC power, which can reduce the configured power, improve the charging conversion efficiency and the discharging conversion efficiency, and reduce plug boxes. Therefore, on the basis of ensuring the power supply demand of testing devices and cell formation devices, costs can be reduced, and the installation and commissioning cycle can be shortened. Further, the DC busbar in the busbar box can not only function to transmit DC power, but also can achieve recycling of energy, thereby achieving the effects of energy saving and consumption reduction, and cost reduction. In some embodiments, the busbar box is further provided with a DC circuit breaker, the DC circuit breaker being connected between the power conversion system and the DC busbar. In the technical solution of the embodiments of the present application, the DC circuit breaker may cut off the DC output of the power conversion system in various scenarios, thereby protecting the power conversion system and the electrical device. In some embodiments, the busbar box is further provided with an electrical device circuit breaker, the electrical device circuit breaker being connected between the DC busbar and the electrical device. In the technical solution of the embodiments of the present application, the electrical device circuit breaker may cut off the connection between the DC busbar and the electrical device in various scenarios, thereby protecting the DC busbar and the electrical device. In some embodiments, the power conversion system includes a main power conversion system and a backup power conversion system, and the busbar box is further provided with a switching circuit breaker, the switching circuit breaker being connected to each of the main power conversion system, the backup power conversion system, and the electrical device, where the switching circuit breaker is configured to, when the main power conversion system fails, disconnect a connection between the main power conversion system and the electrical device, and connect the backup power conversion system to the electrical device. In the technical solution of the embodiments of the present application, by providing the switching circuit breaker, in a case where the main power conversion system fails, the backup power conversion system can be used to replace the main power conversion system, thereby ensuring normal power supply to the electrical device. In some embodiments, a plurality of main power conversion systems, a plurality of busbar boxes, and a plurality of electrical devices are provided, and one backup power conversion system is provided, where each of the main power conversion systems is connected to one of the electrical devices through a switching circuit breaker in a corresponding one of the busbar boxes; and the backup power conversion system is connected to each of the plurality of the electrical devices through a sw