Emergency standby power supply device

Abstract

The utility model discloses an emergency standby power supply device which comprises a diesel generating set, an energy storage battery pack, an energy storage converter and an energy management system, the diesel generating set and the energy storage battery pack are connected into the energy storage converter through a direct current bus, the energy storage converter is connected into a load through an alternating current bus, and the load is externally connected with mains supply. The energy management system is respectively and electrically connected with the diesel generator set, the energy storage battery pack and the energy storage converter, the energy storage battery pack is utilized to ensure that the load can continuously work without interruption when the mains supply is powered off, and the diesel generator set is utilized to realize that the mains supply can supply power to the load for a long time when the mains supply is powered off for a long time.

Description

Technical Field

[0001] This utility model relates to the field of energy storage, and in particular to an emergency backup power supply device. Background Technology

[0002] Currently, the commonly used technologies for emergency backup power mainly include diesel generator sets or energy storage power supply. Both of these modes have their own technical shortcomings. When using diesel generator sets as emergency backup power, if the mains power fails, starting the diesel generator set to supply power usually involves first disconnecting the mains power switch, waiting for a period of time, and then turning on the generator switch. This action will cause a short interruption of power supply to the load, and the system on the load may need to restart. When using energy storage power supply as emergency backup power, when the mains power is normal, the energy storage system supplies power to the load simultaneously with the mains power. When the mains power fails, the energy storage system continues to supply power to the load, thus avoiding power outages on the load side. However, the power supply duration is limited by the capacity of the energy storage system's battery, and in most cases, it is not long enough. To address the problems of these two power supply modes, this application proposes a solution. Summary of the Invention

[0003] Purpose of the utility model: The purpose of this utility model is to provide an emergency backup power supply device that can continuously and for a long time provide power to the load when the mains power fails, and ensure that the load's power supply is not interrupted.

[0004] Technical solution: The emergency backup power supply device of this utility model includes a diesel generator set, an energy storage battery pack, an energy storage converter, and an energy management system. The diesel generator set and the energy storage battery pack are connected to the energy storage converter through a DC bus. The energy storage converter is connected to a load through an AC bus. The load is connected to mains power. The energy management system is electrically connected to the diesel generator set, the energy storage battery pack, and the energy storage converter.

[0005] When the mains power is normal, the energy management system controls the diesel generator set to not work, and the energy storage battery pack supplies power to the load simultaneously with the mains power. When the mains power fails, the energy management system controls the energy storage battery pack to continuously supply power to the load. When the mains power fails and long-term power supply to the load is required, the energy management system starts the diesel generator set to generate power to the DC bus. Together with the energy storage battery pack, the power is sent to the AC bus through the energy storage converter to supply power to the load, achieving uninterrupted long-term power supply.

[0006] Preferably, a switch is provided between the energy storage converter and the load, and the switch is electrically connected to the energy management system.

[0007] Preferably, a second switch is provided between the load and the mains power supply to control its opening and closing, and the second switch is electrically connected to the energy management system.

[0008] Preferably, the diesel generator set and the energy storage battery pack are installed in separate unit cabinets and battery cabinets, respectively, and the energy storage converter and energy management system are installed in a control cabinet.

[0009] Preferably, the bottom of the battery cabinet is provided with a cooling air inlet, and the top of the battery cabinet is provided with a fire extinguishing device.

[0010] Cooling air inlets are installed to cool the battery cabinet and maintain the ambient temperature of the energy storage battery pack. Fire extinguishing devices are provided for fire suppression.

[0011] Preferably, the control cabinet is equipped with an uninterruptible power supply (UPS), which stabilizes the mains power and then supplies it to the load.

[0012] Preferably, the control cabinet is equipped with a DC busbar, which is electrically connected to the energy storage battery pack and the diesel generator set, and combines the output current of the energy storage battery pack and the diesel generator set.

[0013] Preferably, the control cabinet is equipped with a DC-DC converter, which is electrically connected to the output of the DC busbar to adjust the output current of the DC busbar.

[0014] Beneficial effects: Compared with the prior art, this utility model has the following advantages:

[0015] This invention utilizes an energy storage battery pack to ensure that the load can continue to work without interruption when the mains power is cut off, and utilizes a diesel generator set to enable the mains power to supply power to the load for a long time when the mains power is cut off for an extended period of time. Attached Figure Description

[0016] Figure 1 This is the electrical topology diagram of this utility model.

[0017] Figure 2 This is a front sectional view of the present invention.

[0018] The components include: 1. Diesel generator set; 2. Energy storage battery pack; 3. Energy storage converter; 4. Generator cabinet; 5. Battery cabinet; 6. Control cabinet; 7. Uninterruptible power supply; 8. DC combiner board; 9. DC-DC converter. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0020] See appendix Figures 1-2The emergency backup power supply device shown in the figure includes a diesel generator set 1, an energy storage battery pack 2, an energy storage converter 3, and an energy management system. The diesel generator set 1 and the energy storage battery pack 2 are connected to the energy storage converter 3 via a DC bus. The energy storage converter 3 is connected to the load via an AC bus. The load is connected to mains power. At the same time, the energy management system is electrically connected to the diesel generator set 1, the energy storage battery pack 2, and the energy storage converter 3.

[0021] When the mains power is normal, the energy management system controls the diesel generator set 1 to not work, and the energy storage battery pack 2 supplies power to the load simultaneously with the mains power. When the mains power fails, the energy management system controls the energy storage battery pack 2 to continuously supply power to the load. When the mains power fails and long-term power supply to the load is required, the energy management system starts the diesel generator set 1 to generate power to the DC bus. Together with the energy storage battery pack 2, the power is sent to the AC bus through the energy storage converter 3 to supply power to the load, achieving uninterrupted long-term power supply.

[0022] In this embodiment, a switch is provided between the energy storage converter 3 and the load. The switch is electrically connected to the energy management system. The energy management system controls the opening and closing of the switch to control the connection and disconnection between the emergency backup power supply device and the load.

[0023] In this embodiment, a second switch is provided between the load and the mains power to control the opening and closing of the switch. The second switch is electrically connected to the energy management system to control the connection and disconnection between the mains power and the load.

[0024] In this embodiment, the diesel generator set 1 and the energy storage battery pack 2 are installed in separate unit cabinets 4 and 5, respectively, and the energy storage converter 3 and the energy management system are installed in the control cabinet 6.

[0025] By separating the power supply module from the control module during operation, the mutual interference caused by heat generation is reduced, thus improving the safety of the equipment.

[0026] In this embodiment, a cooling air inlet is provided at the bottom of the battery cabinet 5, and a fire extinguishing device is provided at the top of the battery cabinet 5.

[0027] The cooling air inlet is designed to cool down the battery cabinet 5 and ensure the ambient temperature of the energy storage battery pack 2. The fire extinguishing device is used for fire protection and further improves the safety of the equipment.

[0028] In this embodiment, an uninterruptible power supply (UPS) 7 is installed in the control cabinet 6. The UPS 7 stabilizes the mains power and then supplies it to the load.

[0029] In this embodiment, a DC busbar 8 is provided in the control cabinet 6. The DC busbar 8 is electrically connected to the energy storage battery pack 2 and the diesel generator set 1, and combines the output current of the energy storage battery pack 2 and the diesel generator set 1.

[0030] In this embodiment, a DC-DC converter 9 is installed in the control cabinet 6. The DC-DC converter 9 is electrically connected to the output of the DC busbar 8 to adjust the output current of the DC busbar 8.

[0031] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An emergency back-up power supply device, characterized by: The diesel generator set, the energy storage battery set, the energy storage converter and the energy management system are connected to the load through the AC bus, the load is externally connected with the commercial power, and the energy management system is electrically connected with the diesel generator set, the energy storage battery set and the energy storage converter.

2. The emergency backup power supply of claim 1, wherein: A switch one is arranged between the energy storage converter and the load, and the switch one is electrically connected with the energy management system.

3. The emergency backup power supply of claim 1, wherein: A switch two which controls opening and closing is arranged between the load and the commercial power, and the switch two is electrically connected with the energy management system.

4. The emergency backup power supply of claim 1, wherein: The diesel generator set and the energy storage battery set are respectively installed in separate unit cabinets and battery cabinets, and the energy storage converter and the energy management system are installed in a control cabinet.

5. An emergency back-up power supply as claimed in claim 4, characterised in that: A cooling air inlet is arranged at the bottom of the battery cabinet, and a fire extinguishing device is arranged at the top of the battery cabinet.

6. The emergency backup power supply of claim 4, wherein: An uninterruptible power supply is arranged in the control cabinet, and the uninterruptible power supply delivers the commercial power after voltage stabilization to the load.

7. The emergency backup power supply of claim 4, wherein: A DC bus bar is arranged in the control cabinet, the DC bus bar is electrically connected with the energy storage battery set and the diesel generator set, and the output currents of the energy storage battery set and the diesel generator set are collected.

8. An emergency back-up power supply as claimed in claim 7, characterised in that: A DC-DC converter is arranged in the control cabinet, the DC-DC converter is electrically connected with the output of the DC bus bar, and the output current of the DC bus bar is adjusted.

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