A UPS power supply device and energy storage system

Abstract

This utility model discloses a UPS power supply device and energy storage system, including: a UPS body, a UPS input power supply circuit, a UPS output protection circuit, a UPS output bus, and an energy storage system controller (EMU); the UPS input power supply circuit has dual power inputs, one from inside the energy storage system and the other from outside, both power sources are connected to the input terminal of the ATS power switch, and one output is connected to the UPS AC input terminal; the two power sources automatically switch, with the internal power supply taking priority, and the dual-input power supply design of the UPS ensures the reliability of the UPS input power supply; the UPS output protection circuit has a contactor installed between the UPS output terminal and the UPS output bus, and the opening and closing of the contactor is controlled by the energy storage system controller (EMU); it also includes a UPS bypass circuit, which also has a contactor to control the opening and closing of the UPS bypass switch, and the opening and closing of this contactor is controlled by the energy storage system controller (EMU); in the event of a UPS failure, automatic bypass disconnection ensures the stability of the power supply to the load downstream of the UPS.

Description

Technical Field

[0001] This utility model patent relates to the field of power supply device technology, and in particular to a UPS power supply device and energy storage system. Background Technology

[0002] UPS systems are widely used in various applications requiring highly reliable power supply, including computers, computer network systems, solenoid valves, pressure transmitters, and energy storage systems. Energy storage systems consist of AC and DC side systems, both of which require reliable backup power for critical loads. UPS devices, with their functions of providing uninterrupted power, regulated voltage and frequency output, power purification, and safety protection, are the preferred backup power devices in energy storage systems. However, due to size limitations, UPS systems have limited battery capacity and short backup time; when the UPS has no input for an extended period, it is prone to power failure, leading to product damage; furthermore, critical loads are typically directly connected to the UPS output, so when the UPS fails, downstream loads cannot operate, affecting the operation of the entire energy storage system.

[0003] In the prior art, the patent with publication number CN118944266A and titled "UPS Power Supply System for New Energy Box-type Substations" mainly involves providing multiple priority power supply modes under the conventional UPS function, which greatly increases the power supply reliability of intelligent equipment in the power generation system; however, it does not have an automatic shutdown function when the UPS battery is low, the UPS is at risk of power failure, and the only source of power for the UPS back-end load is the UPS output, so it cannot guarantee the power supply to the back-end load when the UPS itself fails. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a UPS power supply device and energy storage system.

[0005] To address the problems of existing technologies, this utility model discloses a UPS power supply device, comprising: a UPS body, a UPS input power supply circuit, a UPS output protection circuit, and a UPS output bus; the UPS input power supply circuit includes an internal power supply, an external power supply, and an ATS power supply switch; the ATS power supply switch has two input terminals and one output terminal, one input terminal connected to the internal power supply, the other input terminal connected to the external power supply, and the output terminal connected to the input terminal of the UPS body; the UPS output protection circuit is connected to the output terminal of the UPS body, the UPS output bus is connected to the output terminal of the UPS body, and the UPS output bus has several load power supply interfaces.

[0006] The technical effects achieved by the above settings are as follows: A UPS is a power protection device with communication functions, typically composed of a battery pack, rectifier, inverter, and static switch; its core component, the inverter, can efficiently convert DC power into stable AC power, ensuring high-quality power support for electronic equipment; the UPS input power supply circuit realizes low battery protection, automatic switching between two power supplies with priority given to the internal power supply, and the dual input power supply design ensures the reliability of the UPS input power supply; the UPS output protection circuit realizes automatic disconnection in case of UPS failure, ensuring the stability of power supply to important loads.

[0007] Furthermore, a fuse FU1 and a surge protector SPD are also connected between the ATS power supply switch and the external power supply.

[0008] The technical effect achieved by the above settings is to provide short-circuit protection for the entire device.

[0009] Furthermore, the UPS output protection circuit includes contactor KM1, a bypass circuit, and contactor KM2. Contactor KM1 is located between the output terminal of the UPS body and the UPS output bus. One end of the bypass circuit is connected between the output terminal of the ATS power supply switch and the input terminal of the UPS body, and the other end is connected between contactor KM1 and the UPS output bus. Contactor KM2 is located in the bypass circuit.

[0010] The technical effect achieved by the above settings is that contactors KM1 and KM2 are interlocked, with only one contactor conducting at a time, preventing short circuits between the UPS output circuit and the UPS bypass circuit. Furthermore, it also includes an energy storage system controller (EMU), which has a DO1 port and a DO2 port. The DO1 port is connected to contactor KM1, and the DO2 port is connected to contactor KM2.

[0011] The technical effect achieved by the above settings is as follows: the energy storage system controller (EMU) controls the closing or opening of contactor KM1 in the UPS output protection circuit via port DO1, and controls the closing or opening of contactor KM2 in the UPS output protection circuit via port DO2. Furthermore, the energy storage system controller (EMU) is equipped with an RS485 communication module, which is used to establish communication with the UPS body.

[0012] The technical effects achieved by the above settings are: enabling the energy storage system controller (EMU) to have communication functions, realize communication with the UPS, read the UPS status in real time, and remotely control the UPS based on the UPS status.

[0013] Furthermore, each load power supply interface of the UPS output bus is equipped with a circuit breaker.

[0014] The technical effect achieved by the above settings is to provide circuit breaker protection for each load.

[0015] The second aspect of this utility model provides an energy storage system, wherein the energy storage system is a cabin structure and the above-mentioned UPS power supply device is provided inside the cabin.

[0016] The technical effect achieved by the above settings is that the UPS power supply device of this utility model is particularly suitable for cabin-type energy storage systems.

[0017] Furthermore, the UPS body is equipped with a switch, which extends to the outside of the energy storage system compartment via a cable.

[0018] The technical effect achieved by the above settings is that the UPS can be turned on and off without opening the energy storage system compartment by means of an external switch.

[0019] Furthermore, the switch is a push-button switch.

[0020] The technical effect achieved by the above settings is: ease of operation.

[0021] The beneficial effects of this utility model are: This invention achieves UPS low power protection by setting up a UPS input power supply circuit, and achieves automatic UPS disconnection in case of failure by setting up a UPS output protection circuit; the UPS can be turned on and off without opening the energy storage system compartment by setting up a push-button switch outside the energy storage system compartment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the UPS power supply device of this utility model; Figure 2 This is a schematic diagram of the communication between the UPS and the energy storage system controller EMU in this utility model; Figure 3 This is a schematic diagram of the contactor control in the UPS output protection circuit of this utility model; Figure 4 This is a flowchart of the control process of the energy storage system controller (EMU) in this utility model. Figure 5 This is a schematic diagram of the UPS switch circuit in this utility model. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example 1

[0024] like Figure 1As shown, this embodiment provides a UPS power supply device, including a UPS body, a UPS input power supply circuit, a UPS output protection circuit, a UPS output bus, and an energy storage system controller (EMU).

[0025] The UPS is a power protection device with communication function, which is usually composed of battery packs, rectifiers, inverters and static switches. Its core component, the inverter, can efficiently convert DC power into stable AC power to ensure that electronic equipment receives high-quality power support. In this embodiment, the UPS input power supply circuit has dual power inputs. One power source comes from inside the energy storage system, which can be the auxiliary transformer within the energy storage system. The other power source comes from outside. Both power sources are connected to the input terminal of the ATS power supply switch, and one output is connected to the AC input terminal of the UPS body. The two power sources automatically switch, with the internal power supply taking priority. The dual-input power supply design of the UPS ensures the reliability of the UPS input power supply. The external power supply line is also grounded through fuse FU1 and surge protector SPD to form short-circuit protection.

[0026] The UPS output protection circuit includes, on the one hand, a contactor KM1 is installed between the output terminal of the UPS body and the UPS output bus, and the opening and closing of the contactor KM1 is controlled by the energy storage system controller EMU; on the other hand, it also includes a UPS bypass circuit, one end of which shares a bus with the input terminal of the UPS body, and the output terminal of the bypass circuit shares a bus with the UPS output bus. The UPS bypass circuit is equipped with a contactor KM2, which is used to control the opening and closing of the UPS bypass switch, and the opening and closing of the contactor KM2 is controlled by the energy storage system controller EMU.

[0027] The UPS output bus is used to provide power to important loads at the back end of the UPS. Circuit breakers QF1, QF2...QFn are configured between the loads at the back end of the UPS and the UPS output bus.

[0028] like Figure 2 As shown, the energy storage system controller (EMU) has DO ports, where DO1 controls the closing and opening of contactor KM1 in the UPS output protection circuit, and DO2 controls the closing and opening of contactor KM2 in the UPS output protection circuit. The energy storage system controller (EMU) also has communication functions, enabling communication with the UPS body, real-time reading of the UPS status, and remote control based on the UPS status. In this embodiment, the energy storage system controller (EMU) and the UPS communicate via RS485.

[0029] Based on the above circuit configuration, the UPS power supply device in this embodiment has three power supply modes: mains power mode, battery mode, and bypass mode. like Figure 3 and Figure 4As shown, contactors KM1 and KM2 are interlocked, with only one contactor conducting at a time to prevent short circuits between the UPS output circuit and the UPS bypass circuit; in this embodiment, The UPS power supply method is built into the Energy Storage System Controller (EMU). After establishing communication between the EMU and the UPS, the EMU reads the UPS status in real time and controls the opening and closing of contactors KM1 and KM2, as well as the shutdown of the UPS, based on the UPS information. Specifically, after the UPS is powered on, the EMU controls contactor KM1 to close, energizing the UPS output bus to supply power to the important loads downstream of the UPS. When the UPS detects mains power input, the UPS power supply mode is mains power mode. When mains power is unavailable, the UPS supplies power to the important loads downstream of the UPS through built-in or external batteries, and the UPS power supply mode is battery mode. When the battery's SOC value reaches the preset protection value of 10%, the EMU remotely shuts down the UPS to prevent UPS power failure. When the UPS SOC value is greater than 10%, indicating a UPS failure, the EMU controls contactor KM1 in the UPS output circuit to open, and contactor KM2 in the UPS bypass circuit to close, allowing mains power to directly supply power to the loads downstream of the UPS. In this case, the UPS power supply mode is bypass mode.

[0030] It should be noted that the above control method can be achieved through conventional software settings. The inventive point of this utility model lies in the design of the circuit structure. Example 2

[0031] This embodiment provides an energy storage system, such as Figure 5 As shown, the UPS hardware power-on / off circuit of the energy storage system has a UPS body button switch that extends to the outer shell of the energy storage system compartment via a cable. The button switch can be either point-controlled or self-locking, allowing the UPS to be powered on or off without opening the energy storage system compartment.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the accompanying drawings of this utility model, the filling pattern is only used to distinguish the layers and is not used for any other limitation.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A UPS power supply device, characterized by comprising: include: The UPS comprises a main body, a UPS input power supply circuit, a UPS output protection circuit, and a UPS output bus. The UPS input power supply circuit includes an internal power supply, an external power supply, and an ATS power supply switch. The ATS power supply switch has two input terminals and one output terminal, with one input terminal connected to the internal power supply and the other input terminal connected to the external power supply. The output terminal is connected to the input terminal of the UPS main body. The UPS output protection circuit is connected to the output terminal of the UPS main body, and the UPS output bus is connected to the output terminal of the UPS main body. The UPS output bus has several load power supply interfaces.

2. The UPS power supply of claim 1, wherein, A fuse FU1 and a surge protector SPD are also connected between the ATS power supply switch and the external power supply.

3. The UPS power supply of claim 1, wherein, The UPS output protection circuit includes contactor KM1, bypass circuit and contactor KM2. Contactor KM1 is located between the output terminal of the UPS body and the UPS output bus. One end of the bypass circuit is connected between the output terminal of the ATS power supply switch and the input terminal of the UPS body, and the other end is connected between contactor KM1 and the UPS output bus. Contactor KM2 is located in the bypass circuit.

4. The UPS power supply of claim 3, wherein, It also includes an energy storage system controller (EMU), which has a DO1 port and a DO2 port. The DO1 port is connected to a contactor KM1, and the DO2 port is connected to a contactor KM2.

5. The UPS power supply of claim 4, wherein, The energy storage system controller (EMU) is equipped with an RS485 communication module, which is used to establish communication with the UPS body.

6. The UPS power supply of claim 1, wherein, Each load power supply interface of the UPS output bus is equipped with a circuit breaker.

7. An energy storage system characterized by, The energy storage system is a cabin structure, and the cabin is equipped with a UPS power supply device as described in any one of claims 1-6.

8. The energy storage system of claim 7, wherein, The UPS body is equipped with a switch, which extends to the outside of the energy storage system compartment via a cable.

9. The energy storage system of claim 8, wherein, The switch is a push-button switch.

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