Rapid switching circuit for realizing charging and discharging functions between cabinet and power van

Abstract

The utility model discloses a rapid switching circuit for realizing charging and discharging functions between a cabinet and a power van, which comprises the cabinet and the power van, the power van is arranged outside the cabinet, and the power van is connected with the cabinet through a charging and discharging butt joint; an electric police device, a signal lamp system and a power supply switching module are arranged in the cabinet; one input end of the power supply switching module is connected with the mains supply, the other input end of the power supply switching module is connected with the power supply vehicle through the charging and discharging butt joint, the output end of the power supply switching module is connected with the electronic police equipment and the signal lamp system, and power supply of the mains supply and power supply of the power supply vehicle are switched through the power supply switching module. Power supply for the electronic police equipment and the signal lamp system is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of traffic management, in particular to a fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle. Background Art

[0002] Urban road traffic facilities, as a crucial component of urban infrastructure, provide crucial support for people's mobility. The electric alarms and signal systems within these facilities play a crucial role in ensuring safe and smooth urban road traffic. For this reason, these systems must operate 24 / 7. However, during power outages, these devices cease to function properly, causing significant inconvenience and safety risks to road traffic.

[0003] In order to ensure the normal operation of road traffic facilities, there are two commonly used solutions:

[0004] One approach involves installing a UPS and battery system within a cabinet at a traffic intersection to ensure the continued operation of the cabinet's electrical warning equipment and signal light systems after a power outage. This solution typically has a power switching time of less than 10ms, and the entire power outage and power recovery process has little impact on the normal operation of the cabinet's electrical warning equipment and signal light systems. However, due to space constraints within the cabinet, the built-in battery capacity is relatively small. As a result, this UPS and battery solution typically only supports the electrical warning equipment and signal light systems for a short period of time after a power outage, but the grid fault resolution time often exceeds this time. For these reasons, this solution is not widely used in current urban road traffic facilities.

[0005] Another approach is to have the O&M team bring in a backup power source (including batteries, generators, etc.) to power the cabinet after a power outage, ensuring the continued operation of the electrical warning equipment and signaling systems within the cabinet. This solution is currently more widely used, but the electrical warning equipment and signaling systems in traffic facilities will cease functioning during the period between the power outage and the time the O&M team re-energizes the cabinet. This creates significant inconvenience and safety hazards for road traffic and can easily lead to potential accidents. When the backup power source (battery) runs out of power, the O&M team typically needs to bring the battery back to the facility for recharging, a process that consumes a significant amount of their time and energy.

[0006] In response to the problems in the related art, the utility model provides a fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle. Utility Model Content

[0007] The purpose of the utility model is to address the defects of the existing technology and provide a fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle.

[0008] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0009] A fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle comprises a cabinet and a power supply vehicle. The power supply vehicle is arranged outside the cabinet and connected to the cabinet via a charging and discharging docking connector. The cabinet is provided with an electric alarm device, a signal light system, and a power supply switching module.

[0010] One input end of the power supply switching module is connected to the mains power, and the other input end of the power supply switching module is connected to the power supply vehicle through a charging and discharging docking connector. The output end of the power supply switching module is connected to the electric police equipment and the signal light system. The power supply of the mains power and the power supply vehicle is switched through the power supply switching module to realize power supply for the electric police equipment and the signal light system.

[0011] Furthermore, a charging control module is provided in the cabinet, the input end of the charging control module is connected to the mains, and the output end of the charging control module is connected to the power supply vehicle through a charging and discharging docking connector.

[0012] Furthermore, the power supply vehicle includes a lithium battery, an inverter circuit, and a charge and discharge switching module; the output end of the lithium battery is connected to the input end of the inverter circuit, the output end of the inverter circuit is connected to one end of the charge and discharge switching module, and the other end of the charge and discharge switching module is connected to the power supply switching module through a charge and discharge docking connector.

[0013] Furthermore, the power supply vehicle also includes a charging circuit, the input end of the charging circuit is connected to the charge and discharge switching module, and the output end of the charging circuit is connected to the input end of the lithium battery.

[0014] Furthermore, the charge and discharge switching module is also connected to the charge control module via a charge and discharge docking connector.

[0015] Furthermore, the charging control module provides 220V AC power to charge the power supply vehicle.

[0016] Furthermore, the inverter circuit converts the direct current of the lithium battery into 220V alternating current.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The overall operation and maintenance cost is advantageous. The fast switching circuit for charging and discharging functions between the cabinet and the power supply vehicle can ensure that the electric alarm equipment and signal light system in the cabinet can continue to operate normally after a power outage.

[0019] 2. The switching time for power supply restoration after power outage is extremely short, which does not affect the normal operation of the electric alarm equipment and signal light system in the cabinet, reducing the adverse impact of power outage on road traffic.

[0020] 3. It is more convenient for operation and maintenance personnel to maintain the system, so that they can concentrate on repairing and maintaining the power supply, which significantly improves the operation and maintenance efficiency of the operation and maintenance personnel and the effect of emergency event handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a fast switching circuit diagram for realizing charging and discharging functions between a cabinet and a power supply vehicle, provided in Example 1. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within these embodiments may be combined with one another, unless they conflict.

[0023] The purpose of the utility model is to address the defects of the existing technology and provide a fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle.

[0024] Example 1

[0025] This embodiment provides a fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle. Figure 1 As shown, it includes a cabinet 1 and a power supply vehicle 2 . The power supply vehicle 2 is mounted on the outside of the cabinet 1 , and the cabinet 1 and the power supply vehicle 2 are connected via a charging and discharging docking connector 3 .

[0026] The cabinet 1 is equipped with an electric alarm device and signal light system 11, a power supply switching module 12, and a charging control module 13; the power supply vehicle 2 is equipped with a charge and discharge switching module 21, a charging circuit 22, a lithium battery 23, and an inverter circuit 24.

[0027] In this embodiment, the electric alarm equipment and signal light system 11 are existing traffic equipment and are not specifically limited in this embodiment; the power supply switching module 12 adopts the NCH8-20 / 22 model AC contactor; the charging control module 13 adopts the NCH8-20 / 20 model AC contactor; the charge and discharge switching module 21 adopts the NCH8-20 / 22 model AC contactor; the charging circuit 22 adopts the CHG2205-600W24V charger board (input voltage range AC154~AC2 85V / 50Hz, output DC17.5~DC29.4V); the lithium battery 23 adopts a 25.6V200AH lithium iron phosphate battery pack (composed of 16 3.2V100AH ​​lithium iron phosphate batteries); the inverter circuit 24 adopts an INV2202-1.5K220V inverter board (input voltage range DC20~DC32V, output pure sine wave AC230V / 50Hz, continuous output power 1500W, peak output power 3000W).

[0028] The input end of the AC power is respectively connected to one input end of the power supply switching module 12 and the input end of the charging control module 13, and the output end of the power supply switching module 12 is connected to the input end of the electric alarm equipment and signal light system 11; the output end of the charging control module 13 and the other input end of the power supply switching module 12 are both connected to one end of the charge and discharge docking connector 3; the other end of the charge and discharge docking connector 3 is connected to the charge and discharge switching module 21, and the charge and discharge switching module 21 is also connected to the input end of the charging circuit 22 and the output end of the inverter circuit 24, the output end of the charging circuit 22 is connected to the input end of the lithium battery 23, and the output end of the lithium battery 23 is connected to the input end of the inverter circuit 24.

[0029] In the initial state, the power supply switching module 12 is connected to the mains, that is, the mains is directly used for power supply, and the charge and discharge switching module 21 of the power supply vehicle 2 is in the charging mode; wherein the mains input is 220V AC.

[0030] When the mains power is in a normal power supply state, part of the 220V AC power of the mains power is directly used to power the electric police equipment and the signal light system 11 through the power supply switching module 12;

[0031] The other part of the 220V AC power of the mains is used to charge the power supply vehicle 2 through the charging control module 13. The specific charging method is: after the mains power passes through the charging control module 13, it is connected to the charging mode of the charge-discharge docking connector 3, and then the mains power passes through the charge-discharge switching module 21 in the power supply vehicle 2 to put the power supply vehicle 2 in the charging mode. At this time, the 220V AC power passes through the charging circuit 22 again and becomes DC power that can be used by the lithium battery 23, and then the lithium battery 23 is charged through the charging circuit 22; the charging circuit 22 will also detect whether the power in the lithium battery 23 reaches the full threshold. If so, the charging of the lithium battery 23 is stopped, thereby protecting the lithium battery 23.

[0032] When the mains power is in a power outage state, the power supply switching module 12 in the cabinet 1 detects the mains power outage. At this time, the power supply switching module 12 will immediately switch the mains power supply mode to the power supply vehicle 2 to supply power to the electric alarm equipment and signal light system 11 in the cabinet 1. The switching time of the power supply switching module 12 is less than 50ms, thereby ensuring the normal operation of the electric alarm equipment and signal light system 11 in the cabinet 1.

[0033] The power supply vehicle 2 supplies power to the electric alarm equipment and signal light system 11 in the cabinet 1 as follows:

[0034] The charge and discharge switching module 21 of the power supply vehicle 2 will switch to the discharge mode. At this time, the DC power in the lithium battery 23 is converted into 220V AC power after passing through the inverter circuit 24. The 220V AC power passes through the charge and discharge switching module 21, the charge and discharge docking connector 3, and the power supply switching module 12 in sequence, and finally powers the electric police equipment and signal light system 11 through the power supply switching module 12.

[0035] When the mains power is restored, the power supply switching module 12 in the cabinet 1 detects the mains power call and will immediately switch the power supply mode of the power supply vehicle 2 to the mains power supply to the electric alarm equipment and signal light system 11 in the cabinet 1. The switching time of the power supply switching module 12 is less than 50ms, thereby ensuring the normal operation of the electric alarm equipment and signal light system 11 in the cabinet 1; and the charge and discharge switching module 21 in the power supply vehicle 2 will switch to the charging mode, thereby realizing the charging of the lithium battery 23 by the mains power.

[0036] This embodiment develops a power supply vehicle product mounted on the cabinet, connects power and signals through a charge-discharge docking connector, and has an internal charge-discharge switching module that can realize the charge-discharge function. This can be unaffected by factors such as the internal space of the cabinet, and lithium batteries of different capacities can be configured according to demand to achieve the expected backup power load time, and the tight operation and maintenance human resources. This ensures that when the power grid is out, the power supply vehicle can be quickly switched to power the electric alarm equipment and signal light system in the cabinet within 50ms. After the mains power is restored, the mains power can be quickly restored to power the electric alarm equipment and signal light system in the cabinet within 50ms, and the power supply vehicle is charged through the charging control module inside the cabinet. The entire process ensures that the electric alarm equipment and signal light system in the cabinet can continue to operate normally regardless of power outages or power surges.

[0037] Because power supply vehicles can be deployed and shared according to the needs of key protected sections, one power supply vehicle can be transported by operation and maintenance personnel to provide backup power for other cabinets, thereby effectively improving the operating efficiency of the equipment and reducing costs.

[0038] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle, characterized in that: It includes a cabinet and a power supply car. The power supply car is arranged outside the cabinet and is connected to the cabinet through a charging and discharging docking connector. The cabinet is equipped with an electric alarm device, a signal light system, and a power supply switching module. One input end of the power supply switching module is connected to the mains power, and the other input end of the power supply switching module is connected to the power supply vehicle through a charging and discharging docking connector. The output end of the power supply switching module is connected to the electric police equipment and the signal light system. The power supply of the mains power and the power supply vehicle is switched through the power supply switching module to realize power supply for the electric police equipment and the signal light system.

2. A fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle according to claim 1, characterized in that: The cabinet is also provided with a charging control module, the input end of the charging control module is connected to the mains, and the output end of the charging control module is connected to the power supply vehicle through a charging and discharging docking connector.

3. A fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle according to claim 2, characterized in that: The power supply vehicle includes a lithium battery, an inverter circuit, and a charge and discharge switching module; the output end of the lithium battery is connected to the input end of the inverter circuit, the output end of the inverter circuit is connected to one end of the charge and discharge switching module, and the other end of the charge and discharge switching module is connected to the power supply switching module through a charge and discharge docking connector.

4. A fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle according to claim 3, characterized in that: The power supply vehicle further comprises a charging circuit, wherein an input end of the charging circuit is connected to the charge and discharge switching module, and an output end of the charging circuit is connected to an input end of the lithium battery.

5. The fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle according to claim 3, characterized in that: The charge and discharge switching module is also connected to the charge control module via a charge and discharge docking connector.

6. A fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle according to claim 2, characterized in that: The charging control module provides 220V AC power to charge the power supply vehicle.

7. A fast switching circuit for realizing charging and discharging functions between a cabinet and a power supply vehicle according to claim 3, characterized in that: The inverter circuit converts the direct current of the lithium battery into 220V alternating current.

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