Switchable dual-power switch box

Abstract

The utility model discloses a switchable dual-power switch box, which relates to the technical field of power equipment and comprises a main power circuit, a standby power circuit and a switching control circuit. The switching control circuit monitors a main power supply in real time and is rapidly switched to a standby power supply when a fault occurs, the problems of equipment damage, data loss, service interruption and the like are effectively avoided, in the aspect of intelligent management, the sensor and the display module can accurately monitor the power supply state, the programmable microcontroller can flexibly set parameters, and the intelligent management is realized. Multiple protection functions of a battery management system in the standby power supply circuit enhance the safety and reliability of the standby power supply, and meanwhile, a low-pass filter guarantees the quality of a main power supply.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a switchable dual power supply switch box. Background Technology

[0002] As modern society becomes increasingly reliant on electricity, various sectors, including industrial production, commercial operations, healthcare, and residential life, depend on a stable power supply. In today's Industry 4.0 era and information society, numerous pieces of equipment, such as precision manufacturing equipment, large data center servers, and hospital medical equipment, have extremely high requirements for the stability and continuity of the power supply. Any interruption or instability in the power supply can lead to serious consequences, such as equipment damage on industrial production lines, data loss in data centers, and disruptions to medical treatment processes in hospitals.

[0003] Traditional power switching methods mainly rely on manual or mechanical switching switches. These traditional methods have many shortcomings. Manual switching requires human intervention and cannot respond quickly in case of emergency power failure, which can easily lead to excessively long power outages. Although mechanical switching switches can achieve a certain degree of automatic switching, the switching speed is slow, the accuracy is poor, and they lack the ability to accurately monitor the power status, which cannot meet the high requirements of modern power supply. Utility Model Content

[0004] The purpose of this invention is to provide a switchable dual power supply switch box to solve at least one of the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a switchable dual power supply switch box, comprising a main power supply circuit, a backup power supply circuit, and a switching control circuit;

[0006] The main power supply circuit includes an input fuse, a rectifier, and a filter. One end of the input fuse is connected to the external main power input line, and the other end is electrically connected to the input terminal of the rectifier. The output terminal of the rectifier is electrically connected to the input terminal of the filter, and the output terminal of the filter is connected to the load line to provide a stable main power supply to the load.

[0007] The backup power circuit includes a rechargeable battery pack, a battery management system, and an inverter. The output terminal of the rechargeable battery pack is electrically connected to the input terminal of the battery management system, and the output terminal of the battery management system is electrically connected to the input terminal of the inverter. The output terminal of the inverter is connected to the load line to provide power support to the load when the main power circuit fails or malfunctions.

[0008] The switching control circuit connects the main power circuit and the backup power circuit. The switching control circuit includes a microcontroller, a voltage sensor, a current sensor, and a relay. The voltage sensor is electrically connected to the output of the main power circuit to monitor its voltage. The current sensor is connected in series in the output line of the main power circuit to monitor its current. The outputs of both the voltage and current sensors are electrically connected to the input of the microcontroller. The output of the microcontroller is electrically connected to the control terminal of the relay. The relay has two sets of contacts: one set connected in series between the main power circuit and the load line, and the other set connected in series between the backup power circuit and the load line. When the microcontroller detects a voltage fluctuation exceeding a preset range, current interruption, or other fault or abnormal condition in the main power circuit detected by the voltage and current sensors, it controls the relay to switch the load from the main power circuit to the backup power circuit to ensure continuous power supply.

[0009] Preferably, the switchable dual power supply switch box includes a line connection port.

[0010] Preferably, the switching control circuit further includes a display module for real-time display of line voltage, current and other information. The display module consists of a display screen, a voltage acquisition circuit and a current acquisition circuit. The voltage acquisition circuit is electrically connected to the output terminal of the main power supply circuit, and the current acquisition circuit is connected in series on the output line of the main power supply circuit. The output terminals of both the voltage acquisition circuit and the current acquisition circuit are electrically connected to the input terminal of the display screen.

[0011] Preferably, the filter in the main power supply circuit is a low-pass filter, the input terminal of the filter is electrically connected to the output terminal of the rectifier, and the output terminal of the filter is electrically connected to the load line.

[0012] Preferably, the battery management system in the backup power circuit has overcharge protection, over-discharge protection, short circuit protection, and temperature monitoring functions. The output terminal of the rechargeable battery pack is electrically connected to the input terminal of the battery management system, and the output terminal of the battery management system is electrically connected to the input terminal of the inverter, ensuring the safe operation of the rechargeable battery pack under various operating conditions.

[0013] Preferably, the microcontroller in the switching control circuit has a programmable function and can flexibly set switching parameters according to different load requirements and power characteristics, such as switching delay time, voltage threshold, current threshold, etc. The input terminal of the microcontroller is electrically connected to the output terminals of the voltage sensor and the current sensor, and the output terminal of the microcontroller is electrically connected to the control terminal of the relay.

[0014] The beneficial effects of this utility model are as follows:

[0015] In this invention, the main power supply status is monitored in real time by a switching control circuit, and a quick switch to the backup power supply is made in case of a fault, avoiding power outages and related serious consequences, thus improving the level of intelligent power management. Voltage and current sensors and display modules facilitate monitoring of power supply status, and the programmable microcontroller can flexibly set switching parameters to adapt to various scenarios, enhancing the safety and reliability of the backup power supply. The battery management system of the backup power supply circuit provides multiple protection functions, and the low-pass filter of the main power supply circuit ensures power quality. It also features convenient operation and equipment safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the power switch box and circuit connection of this utility model;

[0017] Figure 2 This is a schematic diagram of the circuit connection of this utility model. Detailed Implementation

[0018] 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.

[0019] This utility model provides, for example Figure 1-2 The switchable dual power supply switch box shown includes a main power supply circuit, a backup power supply circuit, and a switching control circuit.

[0020] The main power supply circuit includes an input fuse, a rectifier, and a filter. One end of the input fuse is connected to the external main power input line, and the other end is electrically connected to the input terminal of the rectifier. The output terminal of the rectifier is electrically connected to the input terminal of the filter, and the output terminal of the filter is connected to the load line to provide a stable main power supply to the load.

[0021] The backup power circuit includes a rechargeable battery pack, a battery management system, and an inverter. The output terminal of the rechargeable battery pack is electrically connected to the input terminal of the battery management system, and the output terminal of the battery management system is electrically connected to the input terminal of the inverter. The output terminal of the inverter is connected to the load line to provide power support to the load when the main power circuit fails or malfunctions.

[0022] The switching control circuit connects the main power circuit and the backup power circuit. The switching control circuit includes a microcontroller, a voltage sensor, a current sensor, and a relay. The voltage sensor is electrically connected to the output of the main power circuit to monitor its voltage. The current sensor is connected in series in the output line of the main power circuit to monitor its current. The outputs of both the voltage and current sensors are electrically connected to the input of the microcontroller. The output of the microcontroller is electrically connected to the control terminal of the relay. The relay has two sets of contacts: one set connected in series between the main power circuit and the load line, and the other set connected in series between the backup power circuit and the load line. When the microcontroller detects a voltage fluctuation exceeding a preset range, current interruption, or other fault or abnormal condition in the main power circuit detected by the voltage and current sensors, it controls the relay to switch the load from the main power circuit to the backup power circuit to ensure continuous power supply.

[0023] The switchable dual power supply switch box includes a line connection port.

[0024] The switching control circuit also includes a display module that displays line voltage, current and other information in real time. The display module consists of a display screen, a voltage acquisition circuit and a current acquisition circuit. The voltage acquisition circuit is electrically connected to the output terminal of the main power supply circuit, and the current acquisition circuit is connected in series on the output line of the main power supply circuit. The output terminals of both the voltage acquisition circuit and the current acquisition circuit are electrically connected to the input terminal of the display screen.

[0025] The filter in the main power supply circuit is a low-pass filter. The input terminal of the filter is electrically connected to the output terminal of the rectifier, and the output terminal of the filter is electrically connected to the load line.

[0026] The battery management system in the backup power circuit has overcharge protection, over-discharge protection, short circuit protection, and temperature monitoring functions. The output terminal of the rechargeable battery pack is electrically connected to the input terminal of the battery management system, and the output terminal of the battery management system is electrically connected to the input terminal of the inverter, ensuring the safe operation of the rechargeable battery pack under various operating conditions.

[0027] The microcontroller in the switching control circuit has a programmable function and can flexibly set switching parameters according to different load requirements and power characteristics, such as switching delay time, voltage threshold, current threshold, etc. The input terminal of the microcontroller is electrically connected to the output terminal of the voltage sensor and the current sensor, and the output terminal of the microcontroller is electrically connected to the control terminal of the relay.

[0028] The following are examples:

[0029] In a switchable dual power supply switch box, the main and backup power switching mechanism uses voltage and current sensors to monitor the status of the main power circuit in real time. When the main power circuit experiences faults or abnormalities such as voltage fluctuations exceeding the preset range or current interruptions, the microcontroller can quickly control the relay to switch the load from the main power circuit to the backup power circuit. This fast and automatic switching mechanism effectively avoids power supply interruptions caused by main power failures, ensuring that the load can continuously receive power and meeting the needs of occasions with strict requirements for power supply continuity (such as life support equipment in hospitals and servers in data centers).

[0030] In response to sudden power outages (such as lightning strikes causing instantaneous power grid outages or power transmission line failures), the real-time monitoring and rapid response capabilities of the switching control circuit enable power switching to be completed in a very short time, minimizing the impact on load equipment. This avoids potential damage to equipment due to sudden power outages, as well as serious consequences such as data loss and business interruption.

[0031] Improve the intelligence level of power management

[0032] The intelligent monitoring function switching control circuit incorporates voltage and current sensors that accurately monitor the voltage and current status of the main power supply circuit. Furthermore, the voltage and current acquisition circuits in the display module also collect data on the voltage and current of the main power supply circuit and display the relevant parameters on the screen. This multi-faceted monitoring capability allows users to understand the power supply's operating status in real time, such as whether there are voltage fluctuations, current overloads, or other issues, facilitating timely maintenance and management.

[0033] Programmable microcontrollers are programmable and can flexibly set switching parameters, such as switching delay time, voltage threshold, and current threshold, according to different load requirements (e.g., different voltage and current requirements for devices with different power ratings) and power supply characteristics (e.g., the voltage and current ratings of the main power supply and backup power supply). This feature enables dual-power switch boxes to adapt to a variety of different application scenarios, improving the versatility and intelligent management level of the equipment.

[0034] (III) Enhance the safety and reliability of backup power supplies

[0035] The backup power circuit design incorporates a battery management system with overcharge protection, over-discharge protection, short-circuit protection, and temperature monitoring. These protection functions ensure the safety of the rechargeable battery pack during charging and discharging, preventing damage due to overcharging, over-discharging, or short circuits. Simultaneously, the temperature monitoring function can promptly detect abnormal temperature conditions (such as overheating) in the battery pack, preventing safety accidents caused by overheating. This comprehensive protection mechanism enhances the reliability of the backup power supply, ensuring a stable power supply to the load in the event of a main power failure.

[0036] Low-pass filters ensure power quality. The low-pass filter in the main power supply circuit effectively filters out high-frequency interference components in the rectified current, ensuring the purity of the output power. A clean power supply helps improve the operating efficiency and lifespan of the load equipment, reduces equipment failures caused by power interference, and further enhances the reliability of the entire dual power supply switch box system.

[0037] (iv) Ease of operation and equipment safety

[0038] The convenient line connection ports of the switchable dual power switch box feature a specific design (such as a quick-plug interface based on the "quick power access" principle) that makes connecting or replacing backup power convenient and quick. This quick-plug interface design improves the efficiency of equipment maintenance and emergency operations, reducing time delays and operational risks that may result from complex power connection operations.

[0039] The grounding port, located on the lower side of the equipment, is effectively connected to the external grounding wire and grounding grid via a grounding bolt and grounding conductor, providing grounding protection for the lines and equipment. This grounding protection effectively prevents injury to personnel from equipment leakage and avoids damage to internal circuits due to static electricity, thus improving the overall safety of the equipment.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A switchable dual power supply switch box, characterized in that: Includes main power supply circuit, backup power supply circuit and switching control circuit; The main power supply circuit includes an input fuse, a rectifier, and a filter. One end of the input fuse is connected to the external main power input line, and the other end is electrically connected to the input terminal of the rectifier. The output terminal of the rectifier is electrically connected to the input terminal of the filter, and the output terminal of the filter is connected to the load line to provide a stable main power supply to the load. The backup power circuit includes a rechargeable battery pack, a battery management system, and an inverter. The output terminal of the rechargeable battery pack is electrically connected to the input terminal of the battery management system, and the output terminal of the battery management system is electrically connected to the input terminal of the inverter. The output terminal of the inverter is connected to the load line to provide power support to the load when the main power circuit fails or malfunctions. The switching control circuit connects the main power circuit and the backup power circuit. The switching control circuit includes a microcontroller, a voltage sensor, a current sensor, and a relay. The voltage sensor is electrically connected to the output of the main power circuit to monitor its voltage. The current sensor is connected in series in the output line of the main power circuit to monitor its current. The outputs of both the voltage and current sensors are electrically connected to the input of the microcontroller. The output of the microcontroller is electrically connected to the control terminal of the relay. The relay has two sets of contacts: one set connected in series between the main power circuit and the load line, and the other set connected in series between the backup power circuit and the load line. When the microcontroller detects that the voltage fluctuation of the main power circuit exceeds a preset range, or that there is a current interruption fault or abnormal situation, based on the voltage and current sensors, it controls the relay to switch the load from the main power circuit to the backup power circuit to ensure the continuity of power supply.

2. The switchable dual power supply switch box according to claim 1, characterized in that: The switchable dual power supply switch box includes a line connection port.

3. The switchable dual power supply switch box according to claim 1, characterized in that: The switching control circuit also includes a display module for real-time display of line voltage and current information. The display module consists of a display screen, a voltage acquisition circuit, and a current acquisition circuit. The voltage acquisition circuit is electrically connected to the output terminal of the main power supply circuit, and the current acquisition circuit is connected in series on the output line of the main power supply circuit. The output terminals of both the voltage acquisition circuit and the current acquisition circuit are electrically connected to the input terminal of the display screen.

4. The switchable dual power supply switch box according to claim 1, characterized in that: The filter in the main power supply circuit is a low-pass filter. The input terminal of the filter is electrically connected to the output terminal of the rectifier, and the output terminal of the filter is electrically connected to the load line.

5. A switchable dual power supply switch box according to claim 1, characterized in that: The battery management system in the backup power circuit has overcharge protection, over-discharge protection, short circuit protection, and temperature monitoring functions to ensure the safe operation of the rechargeable battery pack under various operating conditions.

6. A switchable dual power supply switch box according to claim 1, characterized in that: The microcontroller in the switching control circuit has a programmable function and can flexibly set switching parameters according to different load requirements and power characteristics, such as switching delay time, voltage threshold, and current threshold. The input terminal of the microcontroller is electrically connected to the output terminals of the voltage sensor and the current sensor, and the output terminal of the microcontroller is electrically connected to the control terminal of the relay.

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