UPS (Uninterrupted Power Supply) system based on vanadium liquid electric pile

Abstract

The utility model belongs to the technical field of uninterruptible power supply equipment, and particularly relates to a vanadium liquid electric pile-based UPS system, which comprises a mains supply monitoring unit, a mains supply module, a vanadium liquid electric pile, a standby energy storage module, a plurality of inverters, a rectifier module, a first switching module and a main control module, the mains supply monitoring unit is arranged on the mains supply module; the output end of the mains supply monitoring unit and the control end of the first switching module are respectively connected with the main control module; the output end of the mains supply module is connected with the first switching module; the output end of the vanadium liquid electric pile is connected with the input end of the first inverter, and the output end of the first inverter is connected with the first switching module; the output end of the standby energy storage module is connected with the input end of the second inverter, and the output end of the second inverter is connected with the first switching module; the output end of the first switching module is connected with a load; the output end of the commercial power module is connected with the charging end of the standby energy storage module through the rectification module. The utility model has the advantage that the reliability of the UPS system can be improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of uninterruptible power supply equipment, and in particular relates to a UPS system based on vanadium liquid fuel cell stack. Background Technology

[0002] Uninterruptible power supply (UPS) refers to power supply equipment that will not be interrupted by short power outages, can continuously supply high-quality power, and effectively protect precision instruments.

[0003] Vanadium silver batteries, as a novel energy storage technology, offer long service life, good environmental performance, and high charge / discharge efficiency. In energy storage systems, vanadium silver stacks not only provide efficient energy storage but also achieve long discharge times, making them suitable for UPS systems. However, the reliability of a single vanadium silver stack as a backup power source still needs improvement, and setting up multiple backup power sources can easily complicate the wiring and energy relationships between them.

[0004] Therefore, it is necessary to optimize UPS systems that incorporate vanadium liquid fuel cells to improve their reliability. Utility Model Content

[0005] In view of the technical problems existing in the background art, this utility model provides a UPS system based on vanadium liquid fuel cell stack, which can improve the reliability of UPS system.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A UPS system based on vanadium liquid fuel cell stack includes a mains power monitoring unit, a mains power module, a vanadium liquid fuel cell stack, a backup energy storage module, multiple inverters, a rectifier module, a first switching module, and a main control module; the mains power monitoring unit is installed on the mains power module line, and the output terminal of the mains power monitoring unit and the control terminal of the first switching module are respectively connected to the main control module;

[0008] The output terminal of the mains power module is connected to the first input terminal of the first switching module; the output terminal of the vanadium liquid fuel cell stack is connected to the input terminal of the first inverter, and the output terminal of the first inverter is connected to the second input terminal of the first switching module; the output terminal of the backup energy storage module is connected to the input terminal of the second inverter, and the output terminal of the second inverter is connected to the third input terminal of the first switching module; the output terminal of the first switching module is connected to the load; the output terminal of the mains power module is also connected to the charging terminal of the backup energy storage module through the rectifier module.

[0009] Preferably, a second switching module and a DC transformer module are also provided; the control terminal of the second switching module is connected to the main control module;

[0010] The output terminal of the mains power module is also connected to the first terminal of the second switching module through the rectifier module, and the output terminal of the vanadium liquid fuel cell stack is also provided with a DC transformer module connected to the second terminal of the second switching module;

[0011] The output of the second switching module is connected to the charging terminal of the backup energy storage module.

[0012] Preferably, the mains power monitoring unit includes an ammeter and a voltmeter.

[0013] Preferably, a temperature sensor is also provided, which is located at the vanadium liquid fuel cell stack.

[0014] Preferably, the temperature sensor is a PT100 platinum resistance thermometer or a K-type thermocouple.

[0015] Preferably, the inverter model is PVI-10.0-TL-OUTD.

[0016] Preferably, the first switching module uses a SENTRON ATC5300 power switching controller.

[0017] Preferably, the first switching module uses a solid-state relay.

[0018] This utility model has the following advantages and beneficial effects:

[0019] This utility model, through the cooperation of the mains power monitoring unit and the first switching module, can monitor the mains power status in real time and intelligently switch to the vanadium liquid battery stack or the backup energy storage module according to the availability of mains power and load demand, thereby improving the continuous power supply capability of the system.

[0020] This invention uses a vanadium liquid fuel cell stack, which has a higher charge-discharge cycle, a slower decay rate, and can provide stable power output, providing continuous support for critical loads, and further improving the power supply and switching performance and safety of the system.

[0021] The backup energy storage module of this utility model can be directly charged by the internal mains power and vanadium liquid battery stack, and can achieve more flexible switching of charging sources based on the status. Under the premise that multiple power sources guarantee the power supply to the load, the energy structure is simple and the reliability is higher.

[0022] This invention, based on a control module, helps to achieve intelligent power management by monitoring data, resulting in a UPS system with faster response. Attached Figure Description

[0023] Figure 1 A schematic diagram of the circuit principle of a UPS system based on vanadium liquid fuel cell stack provided in Embodiment 1 of this utility model;

[0024] Figure 2This is a schematic diagram of the circuit principle of a UPS system based on vanadium liquid fuel cell stack provided in Embodiment 2 of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] This embodiment provides a UPS system based on a vanadium liquid fuel cell stack. (See attached document.) Figure 1 It includes a mains power monitoring unit, a mains power module, a vanadium liquid fuel cell stack, a backup energy storage module, multiple inverters, a rectifier module, a first switching module, and a main control module; the mains power monitoring unit is installed on the mains power module line, and the output terminal of the mains power monitoring unit and the control terminal of the first switching module are respectively connected to the main control module;

[0029] The output terminal of the mains power module is connected to the first input terminal of the first switching module; the output terminal of the vanadium liquid fuel cell stack is connected to the input terminal of the first inverter, and the output terminal of the first inverter is connected to the second input terminal of the first switching module; the output terminal of the backup energy storage module is connected to the input terminal of the second inverter, and the output terminal of the second inverter is connected to the third input terminal of the first switching module; the output terminal of the first switching module is connected to the load; the output terminal of the mains power module is also connected to the charging terminal of the backup energy storage module through the rectifier module.

[0030] In this embodiment, the mains power monitoring unit includes an ammeter and a voltmeter.

[0031] As a preferred embodiment, a temperature sensor is also provided, which is located at the vanadium liquid fuel cell stack.

[0032] Furthermore, the temperature sensor can be a PT100 platinum resistance thermometer or a K-type thermocouple.

[0033] On the other hand, the inverter model is preferably PVI-10.0-TL-OUTD.

[0034] Furthermore, the first switching module preferably uses a SENTRON ATC5300 power switching controller.

[0035] Finally, the first switching module preferably uses a solid-state relay.

[0036] The working principle of this embodiment is as follows:

[0037] The mains power monitoring unit monitors the power supply status of the mains module, specifically its voltage and current output. This data is transmitted to the main control module, which uses data such as whether the power supply meets standard power requirements and power stability to decide whether to switch power sources. When the mains power supply is insufficient, the first switching module controls the switch to either a vanadium liquid fuel cell stack or a backup energy storage module. Both the vanadium liquid fuel cell stack and the backup energy storage module output DC power, which is converted by the first and second inverters respectively to replace the mains power. The backup energy storage module is charged after voltage conversion via the mains power module and a rectifier module.

[0038] As a further optimization, this embodiment also includes a temperature sensor to monitor the operating temperature of the vanadium liquid fuel cell stack. When designing the switching scheme, it is preferable to use the vanadium liquid fuel cell stack for power, with the backup energy storage module providing power when its operating temperature is too high and the mains power has not yet returned to normal.

[0039] This embodiment sets up multiple backup power supplies, which improves the stability of the UPS system. Although there are multiple backup power supplies, the power supply relationship is not complicated and it is easy to set up, which improves the reliability and security of the UPS system.

[0040] Example 2

[0041] This embodiment is based on the technical solution of Embodiment 1, and further optimizes the design of the charging source for the backup energy storage module.

[0042] This embodiment also includes a second switching module and a DC transformer module;

[0043] See Figure 2 The control terminal of the second switching module is connected to the main control module;

[0044] The output terminal of the mains power module is also connected to the first terminal of the second switching module through the rectifier module, and the output terminal of the vanadium liquid fuel cell stack is also provided with a DC transformer module connected to the second terminal of the second switching module;

[0045] The output of the second switching module is connected to the charging terminal of the backup energy storage module.

[0046] This embodiment primarily optimizes the charging method of the backup energy storage module. The main control module, based on the status of the mains power module, can select whether to charge via the vanadium liquid fuel cell stack or the mains power module through a second switching module. A DC-DC transformer module with appropriate values ​​is connected between the vanadium liquid fuel cell stack and the backup energy storage module, according to the rated output of the vanadium liquid fuel cell stack and the rated input of the backup energy storage module. This embodiment optimizes the charging safety and efficiency of the backup energy storage module, further enhancing the reliability of the entire UPS system.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vanadium redox flow battery based UPS system, characterized in that The utility monitoring unit is arranged on the line of the utility module, and the output end of the utility monitoring unit and the control end of the first switching module are respectively connected with the main control module. The output end of the utility module is connected with the first input end of the first switching module, the output end of the vanadium liquid electric pile is connected with the input end of the first inverter, the output end of the first inverter is connected with the second input end of the first switching module, the output end of the standby energy storage module is connected with the input end of the second inverter, the output end of the second inverter is connected with the third input end of the first switching module, the output end of the first switching module is connected with the load, and the output end of the utility module is also connected with the charging end of the standby energy storage module through the rectifier module.

2. The vanadium redox flow battery based UPS system of claim 1, wherein: The second switching module and the direct current voltage transformation module are further arranged, and the control end of the second switching module is connected with the main control module. The output end of the utility module is also connected with the first end of the second switching module through the rectifier module, and the output end of the vanadium liquid electric pile is also connected with the second end of the second switching module through the direct current voltage transformation module. The output end of the second switching module is connected with the charging end of the standby energy storage module.

3. The vanadium redox flow battery based UPS system of claim 1, wherein: The utility monitoring unit comprises a current meter and a voltage meter.

4. The vanadium redox flow battery based UPS system of claim 1, wherein: A temperature sensor is further arranged at the vanadium liquid electric pile.

5. A vanadium flow battery based UPS system according to claim 4, characterised in that: The temperature sensor adopts a PT100 platinum resistance or a K type thermocouple.

6. The vanadium redox flow battery based UPS system of claim 1, wherein: The model of the inverter adopts PVI-10.0-TL-OUTD.

7. The vanadium redox flow battery based UPS system of claim 1, wherein: The first switching module adopts a power switching controller with a model of SENTRON ATC5300.

8. The vanadium redox flow battery based UPS system of claim 1, wherein: The first switching module adopts a solid state relay.

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