UPS power supply, communication power supply and operating power supply direct current online isolation device

Abstract

The utility model provides a kind of UPS power supply, communication power supply and operating power supply direct current online isolating device, belong to power maintenance technical field, including power supply, power supply is input alternating current by alternating current power adapter, and power supply is uninterrupted output alternating current or direct current by rectifier, direct current bus breaker is connected in the main circuit between power supply and battery pack, direct current bypass breaker is connected in the two ends of direct current bus breaker after being connected in series with isolating diode, the conduction direction of isolating diode is that battery pack points to power supply, the output end of power supply is connected with battery pack, direct current bus breaker is arranged in series in the main circuit between power supply and battery pack, and the main circuit between power supply and battery pack is provided with isolating diode parallel with direct current bus breaker, and direct current bypass breaker is arranged in series between isolating diode and the main circuit of power supply.

Description

Technical Field

[0001] This utility model relates to the field of power supply maintenance and protection technology, specifically a DC online isolation device for UPS power supply, communication power supply and operating power supply. Background Technology

[0002] In UPS power supplies, communication DC power supplies, and operating DC power supply systems, backup battery packs are the core components that ensure uninterrupted power supply and require regular discharge tests and maintenance to ensure their performance meets standards.

[0003] The following problems were found in the relevant technology: In the traditional maintenance method, when discharging the battery pack for testing, the battery pack needs to be disconnected from the system. If a power outage occurs during this process, the power system will lose its backup power supply, which can easily lead to serious consequences such as equipment shutdown and data loss. If the battery pack is not disconnected and discharged directly, the power supply equipment will continue to charge the battery, resulting in inaccurate discharge test results that cannot truly reflect the actual performance of the battery.

[0004] In response, we propose a DC online isolation device for UPS power supplies, communication power supplies, and operating power supplies.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background section of this application, and therefore may include prior art information that does not constitute prior art information known to those skilled in the art. Utility Model Content

[0006] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies. To address the problem of power supply maintenance and battery isolation in the prior art, this utility model provides a DC online isolation device for UPS power supplies, communication power supplies, and operating power supplies. It employs a bidirectional current switching structure combined with a power output structure to ensure power output during battery maintenance. The specific technical solution is as follows: A DC online isolation device for UPS power supply, communication power supply, and operating power supply includes a power supply unit. The power supply unit receives AC power through an AC power adapter and continuously outputs AC or DC power through a rectifier. The output terminal of the power supply unit is connected to a battery pack. A DC bus circuit breaker is connected in series in the main circuit between the power supply unit and the battery pack. An isolation diode is connected in parallel with the DC bus circuit breaker in the main circuit between the power supply unit and the battery pack. A DC bypass circuit breaker is connected in series between the isolation diode and the main circuit of the power supply unit.

[0007] In the above technical solution, when the DC bus circuit breaker is in the closed state, the DC bypass circuit breaker is in the open state.

[0008] When the DC bypass circuit breaker is closed, the DC bus circuit breaker is in the open state.

[0009] When the DC potential of the power supply component is lower than the potential of the battery pack, the isolation diode is forward-biased.

[0010] The DC bus circuit breaker, the isolation diode, and the DC bypass circuit breaker form an isolation system, and the isolation system is compatible with the DC bus system of UPS power supply, communication DC power supply, and operating DC power supply.

[0011] The power supply unit and the battery pack are supplied with power bidirectionally.

[0012] Compared with the prior art, the beneficial effects of this utility model are: First, the battery discharge test does not require disconnection from the system, and it can still provide uninterrupted power supply when the mains power fails, completely eliminating the risk of power outages associated with traditional maintenance methods.

[0013] Second, by using the reverse cutoff function of the isolation diode, the power supply equipment is prevented from charging the battery pack during the discharge process, ensuring that the discharge test results accurately reflect the actual performance of the battery.

[0014] Third, it has a simple structure and can be directly installed on the DC bus of existing UPS, communication DC and operation DC power supplies without large-scale modification of the original system, making it highly adaptable.

[0015] Fourth, the switching of operating conditions is achieved through the sequential operation of the circuit breaker, which is logically clear, avoids system failures caused by misoperation, and improves the safety of the maintenance process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a DC online isolation device for a UPS power supply, communication power supply and operating power supply according to the present invention; in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-Power supply component, 2-AC power adapter, 3-Rectifier, 4-Battery pack, 5-DC bus circuit breaker, 6-Isolation diode, 7-DC bypass circuit breaker. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The following are specific implementation cases and appendices. Figure 1 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0019] A DC online isolation device for UPS power supplies, communication power supplies, and operating power supplies includes a power supply unit 1. The power supply unit 1 receives AC power through an AC power adapter 2 and continuously outputs AC or DC power through a rectifier 3. A DC bus circuit breaker 5 is connected in series in the main circuit between the power supply unit 1 and the battery pack 4. A DC bypass circuit breaker 7 and an isolation diode 6 are connected in series and then in parallel across the DC bus circuit breaker 5. The isolation diode 6 conducts with the battery pack 4 pointing towards the power supply unit 1. The output terminal of the power supply unit 1 is connected to the battery pack 4. In the DC power supply system of a communication equipment room, this device is installed on the connection line between the DC bus and the battery. The DC bus circuit breaker 5 is a DC molded case circuit breaker, the DC bypass circuit breaker 7 is a DC miniature circuit breaker, and the isolation diode 6 is a silicon rectifier diode adapted to the system voltage level.

[0020] During normal operation, DC bus circuit breaker 5 is closed and DC bypass circuit breaker 7 is open. The battery pack receives charging from the power supply equipment through the main circuit and is in standby mode. When battery discharge maintenance is required, maintenance personnel first close DC bypass circuit breaker 7 through the operation panel, confirm that the bypass circuit is connected, and then open DC bus circuit breaker 5. Subsequently, the discharge test equipment is started. At this time, isolation diode 6 is reverse-biased and cut off, preventing the power supply equipment from charging the battery pack. The battery pack completes the discharge test in an isolated state.

[0021] If the mains power is suddenly interrupted during the test, the DC output potential of the power supply equipment drops below the battery pack voltage. The isolation diode 6 conducts in the forward direction, and the battery pack supplies power to the communication equipment through the bypass circuit until the mains power is restored or the discharge test is completed. No communication service interruption is caused throughout the process. After the test is completed, the DC bus circuit breaker 5 is closed to restore the main circuit connection, and then the DC bypass circuit breaker 7 is opened to close the bypass circuit. The system returns to normal operation. The entire maintenance process is efficient and safe.

[0022] A DC bus circuit breaker 5 is connected in series in the main circuit between power supply unit 1 and battery pack 4. An isolation diode 6 is connected in parallel with the DC bus circuit breaker 5 in the same main circuit. A DC bypass circuit breaker 7 is connected in series between the isolation diode 6 and the main circuit of power supply unit 1. The core components are the DC bus circuit breaker 5, the DC bypass circuit breaker 7, and the isolation diode 6. The DC bus circuit breaker 5 is connected in series in the main circuit between power supply unit 1 and battery pack 4 to control the on / off state of the main circuit. Under normal operating conditions, it remains closed to ensure the battery pack is properly connected to the system. The DC bypass circuit breaker 7 is connected in series with the isolation diode 6 and then in parallel across the DC bus circuit breaker 5, serving as a bypass channel for discharge testing and emergency power supply. Under normal operating conditions, it remains open. The isolation diode 6 is connected in series in the bypass circuit, with its conduction direction pointing from battery pack 4 to power supply unit 1. Its unidirectional conductivity enables both charging isolation and emergency conduction.

[0023] Normal operating condition: DC bus circuit breaker 5 is closed, DC bypass circuit breaker 7 is open, and the battery pack is connected to the power supply equipment through the main circuit. The power supply equipment can charge the battery pack normally, and the battery pack is always in standby backup power supply mode to ensure stable system operation. Discharge test condition: When a discharge test is required on the battery pack, first close DC bypass circuit breaker 7 to connect the bypass circuit, then open DC bus circuit breaker 5 to disconnect the main circuit. At this time, the output terminal of the power supply equipment is connected to the battery pack through the bypass circuit. However, due to the reverse cutoff characteristic of isolation diode 6, the power supply equipment cannot charge the battery pack. The battery pack can be discharged independently to ensure the accuracy and reliability of the test data.

[0024] Emergency power supply condition: If a sudden mains power failure occurs during the discharge test, the power supply equipment stops working and its DC output potential is lower than the battery pack potential. At this time, the isolation diode 6 is forward biased and conducts. The battery pack immediately supplies power to the power supply equipment and subsequent loads through the bypass circuit to achieve uninterrupted backup power supply and avoid equipment shutdown.

[0025] When the DC bus circuit breaker 5 is in the closed state, the DC bypass circuit breaker 7 is in the open state. At this time, one side of the parallel circuit is disconnected, and the current flows in the main circuit of the battery pack 4 and the power supply unit 1 to achieve normal charging and discharging cycle.

[0026] It is worth noting that when the DC bypass circuit breaker 7 is closed, the DC bus circuit breaker 5 is in the open state. First close the DC bypass circuit breaker 7, then open the DC bus circuit breaker 5; at this time, the isolation diode is in the reverse cutoff state, preventing the power supply equipment from charging the battery pack, ensuring that the discharge test is conducted independently.

[0027] Furthermore, when the DC potential on the power supply side of component 1 is lower than the potential of battery pack 4, isolation diode 6 is forward-biased. During the discharge test, if the mains power fails, the DC potential on the power supply side will be lower than the potential of the battery pack, isolation diode 6 will be forward-biased, and the battery pack will provide uninterrupted backup power to the power supply equipment through the bypass circuit.

[0028] Furthermore, the DC bus circuit breaker 5, together with the isolation diode 6 and the DC bypass circuit breaker 7, forms an isolation system. This isolation system is compatible with DC bus systems for UPS power supplies, communication DC power supplies, and operating DC power supplies. It can be directly installed on the existing DC bus without requiring large-scale modifications to the original power system.

[0029] Furthermore, power supply unit 1 and battery pack 4 are bidirectionally powered. During maintenance, after the isolation system is activated, power supply unit 1 is powered through battery pack 4. During normal use, power supply unit 1 charges battery pack 4.

[0030] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[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 DC online isolation device for a UPS power supply, communication power supply, and operating power supply, comprising a power supply component (1), wherein the power supply component (1) receives AC power through an AC power adapter (2), and the power supply component (1) continuously outputs AC or DC power through a rectifier (3), characterized in that, The output terminal of the power supply unit (1) is connected to a battery pack (4). A DC bus circuit breaker (5) is connected in series in the main circuit between the power supply unit (1) and the battery pack (4). An isolation diode (6) is connected in parallel with the DC bus circuit breaker (5) in the main circuit between the power supply unit (1) and the battery pack (4). A DC bypass circuit breaker (7) is connected in series between the isolation diode (6) and the main circuit of the power supply unit (1).

2. The DC online isolation device for a UPS power supply, communication power supply, and operating power supply according to claim 1, characterized in that: When the DC bus circuit breaker (5) is in the closed state, the DC bypass circuit breaker (7) is in the open state.

3. The DC online isolation device for a UPS power supply, communication power supply, and operating power supply according to claim 1, characterized in that: When the DC bypass circuit breaker (7) is closed, the DC bus circuit breaker (5) is in the open state.

4. The DC online isolation device for a UPS power supply, communication power supply, and operating power supply according to claim 1, characterized in that: When the DC potential of the power supply unit (1) is lower than the potential of the battery pack (4), the isolation diode (6) is forward-biased.

5. The DC online isolation device for a UPS power supply, communication power supply, and operating power supply according to claim 1, characterized in that: The DC bus circuit breaker (5) forms an isolation system with the isolation diode (6) and the DC bypass circuit breaker (7), and the isolation system is adapted to the DC bus system of UPS power supply, communication DC power supply and operation DC power supply.

6. The DC online isolation device for a UPS power supply, communication power supply, and operating power supply according to claim 1, characterized in that: The power supply unit (1) supplies power bidirectionally to the battery pack (4).

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