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CN-224233390-U - Multi-input direct-current uninterrupted power supply

CN224233390UCN 224233390 UCN224233390 UCN 224233390UCN-224233390-U

Abstract

The utility model relates to the technical field of direct current uninterruptible power supplies, in particular to a multi-input direct current uninterruptible power supply, which comprises a front-stage DCDC module, a rear-stage DCDC module, a remote switch module, an intelligent monitoring module, a leakage current acquisition module and a battery unit, wherein the rear end of the remote switch module is connected to the input end of a power distribution unit through a leakage current sensor, the communication ports of the intelligent monitoring module are respectively connected to the front-stage DCDC module, the rear-stage DCDC module, the battery unit and the leakage current acquisition module, the leakage current acquisition module is connected to the leakage current sensor, and the input end of the battery unit is connected to the output end of the rear-stage DCDC module.

Inventors

  • He Zongpan
  • JI YONGLIANG
  • TANG ZIJIE

Assignees

  • 成都康斯维智慧能源技术有限公司

Dates

Publication Date
20260512
Application Date
20250529

Claims (7)

  1. 1. A multiple-input dc uninterruptible power supply, comprising: The input end of the front-stage DCDC module is connected to the corresponding high-voltage direct-current power supply input port, and the output end of the front-stage DCDC module is connected to the input end of the rear-stage DCDC module; The input end of the rear-stage DCDC module is connected to the output end of the corresponding front-stage DCDC module, and the output end of the rear-stage DCDC module is connected to the front ends of the battery unit and the remote switch module in parallel; The rear end of the remote switch module is connected to the input end of the power distribution unit through a leakage current sensor; the communication port of the intelligent monitoring module is respectively connected to the front-stage DCDC module, the rear-stage DCDC module, the battery unit and the leakage current acquisition module; the leakage current acquisition module is connected to the leakage current sensor; The input end of the battery unit is connected to the output end of the post-stage DCDC module.
  2. 2. The multiple-input direct current uninterruptible power supply according to claim 1, wherein the number of the front stage DCDC modules is plural, the input end of each front stage DCDC module is connected to the corresponding high voltage direct current power supply input port, the output end is connected to the corresponding rear stage DCDC module input end, the number of the rear stage DCDC modules is plural, the input end of each rear stage DCDC module is connected to the corresponding front stage DCDC module output end, the output ends are connected to the front ends of the battery unit and the remote switch module in parallel, and the communication ports of the intelligent monitoring modules are connected to the front stage DCDC modules and the rear stage DCDC modules respectively.
  3. 3. The multiple-input dc uninterruptible power supply of claim 2, wherein the input of the pre-stage DCDC module is independently connected to the corresponding high voltage dc power input port, and the output of each pre-stage DCDC module is connected to the corresponding post-stage DCDC module input via an independent line.
  4. 4. The multiple-input direct current uninterruptible power supply of claim 2, wherein the output end of the post-stage DCDC module is connected to the front ends of the battery unit and the remote switch module through parallel copper bars, and the input end of the parallel copper bars is directly connected to the output end of each post-stage DCDC module.
  5. 5. The multiple-input direct current uninterruptible power supply of claim 2, wherein the battery unit comprises a plurality of groups of lithium iron phosphate battery modules, and an input end of each group of the battery modules is connected to an output end of a subsequent DCDC module through an independent line.
  6. 6. The multi-input direct current uninterruptible power supply of claim 2, wherein the communication port of the intelligent monitoring module is connected to the pre-stage DCDC module through an RS485 bus, and the communication port of the intelligent monitoring module is connected to the post-stage DCDC module through a CAN bus.
  7. 7. The multi-input direct current uninterruptible power supply of claim 1, wherein the insulation detection port of the intelligent monitoring module is connected to a copper bar of the power distribution unit, and an input end of the copper bar is connected with an output end of the post DCDC module.

Description

Multi-input direct-current uninterrupted power supply Technical Field The utility model relates to the technical field of direct-current uninterruptible power supplies, in particular to a multi-input direct-current uninterruptible power supply. Background Along with the continuous development of the information-based society, a UPS (uninterrupted power supply) system is widely applied to information acquisition, transmission, processing, storage and various information-based application scenes, and the importance of the UPS system is also increasingly highlighted along with the improvement of the application degree of information technology. UPS technology is evolving towards higher efficiency, intellectualization, modularity, and greater environmental adaptability to better meet the increasing demands for power continuity and stability in critical power supply areas such as data centers, communication base stations, medical devices, industrial control systems, and the like. Particularly, under the background of continuous advancement of informatization and industrialization, higher requirements are put on the performance, reliability, energy conservation and intelligent level of UPS products. The modularized UPS is an important choice for the construction of modern data centers due to the advantages of flexible deployment, expandability, convenient maintenance and the like, and the intelligent UPS improves the operation and maintenance efficiency of the system and effectively reduces the operation and maintenance cost through the functions of remote monitoring, fault diagnosis, energy efficiency management and the like. Meanwhile, with the development of the high-voltage direct-current transmission technology, more and more critical devices are required to meet the requirements on the stability and reliability of a power supply system, and the direct-current UPS plays an important role in the power supply system, and particularly can provide continuous and stable electric energy guarantee for important loads under the condition of abnormal or fault of the mains supply. However, the existing dc UPS technology still has many disadvantages in terms of high voltage input, system safety and intelligent monitoring capability, and a new technical solution is needed to break through the existing bottleneck. The traditional direct-current UPS generally adopts a structural form comprising an energy storage device and an inverter, and consists of a rectifier, a storage battery, the inverter, a static switch and the like, wherein an alternating current 220V is used as a main power supply, and a sealed lead-acid battery is used as a standby power supply. Under the normal condition of the commercial power, the UPS rectifies and supplies the alternating-current commercial power to the load and simultaneously charges the battery, and when the commercial power is interrupted, the UPS is immediately switched to supply power by the battery. However, such a system is difficult to flexibly adapt to loads of different voltage levels, and has a problem of poor adaptability. In addition, the traditional UPS is limited in transmission distance due to the design based on 220V alternating current, and an application scene with a long power supply distance requirement is difficult to meet. The new infrastructure scenario represented by intelligent traffic presents an entirely new challenge to power supply and distribution systems. The power supply characteristics of the power supply device are represented by a linear power supply structure instead of a traditional mesh structure, and higher requirements are put on power supply distance, reliability, continuous power supply capacity of small-power loads and the like. And each subsystem in the traditional weak current system is independently deployed with UPS, so that the design capacity is generally larger, the resource waste is serious, the redundant backup between systems cannot be realized, the investment and construction cost is increased, and the later operation and maintenance cost is also increased. The existing direct current UPS technology is difficult to achieve good balance between economy and safety in emerging scenes such as intelligent transportation and the like, and cannot fundamentally meet the comprehensive requirements of the direct current UPS technology on a power supply system, so that innovation and upgrading of the technical level are urgently needed. Disclosure of Invention Based on the problems, the utility model provides a multi-input direct-current uninterruptible power supply system, which effectively improves the reliability and the power supply quality of direct-current uninterruptible power supply through a multi-input redundant power supply mode and various control modes and realizes a seamless power flow system. Ensuring that the direct current power stored in the battery is supplied directly to the connected device enables a seamless and uninterrupte