Explosion-proof extension power supply with battery

Abstract

The utility model discloses an explosion-proof extension power supply with a battery, which comprises a micro-control unit used for core control, a power supply circuit, a controller area network (CAN) circuit used for connecting a controller and a sensor, an annular bus circuit used for data exchange or control signal transmission, and a battery used for storing electric energy. The power supply circuit comprises a rectification circuit, a filter circuit, a voltage conversion circuit and a power supply protection circuit. The explosion-proof extension power supply with the battery has the advantages of being ingenious in design, convenient to use, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the field of fire emergency and evacuation indication systems, and particularly to an explosion-proof self-powered branch power supply with a built-in battery. Background Art

[0002] In a fire emergency and evacuation indication system, a branch power supply refers to a key device designed specifically for a specific area or equipment to provide stable emergency power in case of an emergency. The branch power supply is small in size and low in cost, and can be arranged in a multi-point distributed manner. It is equipped with a backup power supply, such as a storage battery, which can build a solid power protection line to ensure that in case of a fire or other emergencies, emergency lighting fixtures and evacuation indication signs can indicate the direction for personnel evacuation, and the key device can operate using the backup power supply.

[0003] With the rapid development of intelligent building technology, the functions of the branch power supply are no longer limited to simple power supply guarantee. It integrates advanced technologies such as linkage control and intelligent automation, and realizes close linkage with other security facilities such as a fire alarm system and an environmental monitoring system. Therefore, a highly integrated design of the branch power supply is required, which can make the fire emergency and evacuation indication system respond to various emergencies more accurately and efficiently. Summary of the Utility Model

[0004] In order to provide a new explosion-proof self-powered branch power supply applicable to a fire emergency and evacuation indication system, the utility model designs a branch power supply including an MCU (Microcontroller Unit) control core and reliable communication.

[0005] The utility model provides an explosion-proof self-powered branch power supply, including a microcontroller unit for core control, a power circuit, a CAN (Controller Area Network) circuit for connecting a controller and a sensor, a ring bus circuit for data exchange or control signal transmission, and a battery for storing electrical energy; the power circuit includes a rectifier circuit, a filter circuit, a voltage conversion circuit, and a power protection circuit.

[0006] Preferably, the voltage conversion circuit provides 12V, 5V, and 3.3V DC voltages.

[0007] Preferably, it further includes a display unit, and the display unit includes LED indicator lights, function buttons, and a display screen.

[0008] Preferably, the CAN (Controller Area Network) circuit supports multi-channel serial communication.

[0009] Preferably, it further includes an explosion-proof housing.

[0010] Beneficial effects of the utility model:

[0011] 1) It adopts explosion-proof shell and is equipped with batteries to support the switching of main power and backup power.

[0012] 2) It can be controlled locally, and can also support reliable communication and control through CAN and LoopBus (ring bus), improving the fire-fighting capabilities of smart buildings.

[0013] 3) Reliable performance, low cost, suitable for distributed multi-point deployment, and improve the system's resilience.

[0014] 4) It can adapt to harsh environments and can be placed in basements, distribution rooms, or building shafts, reducing power supply lines.

[0015] The utility model discloses an explosion-proof self-contained battery extension power supply, which has the characteristics of ingenious design, convenient use, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an electrical schematic diagram of an explosion-proof self-contained battery extension according to an embodiment of the utility model;

[0017] Figure 2 This is a circuit diagram of an explosion-proof self-contained battery extension power supply MCU in an embodiment of the utility model;

[0018] Figure 3 This is a power circuit diagram of an explosion-proof self-contained battery extension power supply according to an embodiment of the utility model;

[0019] Figure 4 This is a circuit diagram of an explosion-proof CAN power supply with a battery extension according to an embodiment of the utility model;

[0020] Figure 5 This is a circuit diagram of an explosion-proof self-contained battery extension power ring bus in the embodiment of the utility model;

[0021] Figure 6 The utility model is a schematic diagram of an explosion-proof battery-powered extension display unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0023] The utility model embodiment provides an explosion-proof extension power supply with a built-in battery. Figure 1It is its electrical schematic diagram. The charger in the figure is used to convert alternating current into direct current to charge the storage battery. The main and standby power switching device ensures the smooth switching of loads such as lamps between the commercial power and the DC output. When the power grid is powered on, the system is in a static state and there is no noise. When the power grid is powered off, it automatically switches, enabling unattended operation. Especially after forced switching in case of an accident or fire, the power supply can work under 120% overload until the battery is completely exhausted. The extension power supply is suitable for harsh environments and can be placed in basements, distribution rooms, or even building shafts. It can be set up locally near the emergency load usage site to reduce the power supply line. The extension power supply can be locally controlled or controlled by fire linkage through a dedicated communication network.

[0024] An explosion-proof extension power supply with built-in battery according to an embodiment of the present utility model mainly adds a control and communication part on the basis of Figure 1 the electrical schematic diagram. The extension power supply includes an MCU (Microcontroller Unit), a power supply circuit, a CAN (Controller Area Network) circuit, a LoopBus circuit, and a battery for storing electrical energy.

[0025] The MCU is the core processing part of the extension power supply, responsible for receiving data from various sensors, such as fire detectors, smoke sensors, etc., and making decisions based on this data. It controls the operating state of the entire system, including the startup of emergency lighting, the generation and adjustment of evacuation indicators, the switching of the main and standby circuits, etc. By running preset programs or algorithms, the MCU can respond to emergencies such as fires in real time, switch the main and standby power, ensure that the evacuation indicator system can quickly and accurately guide personnel to evacuate, and key equipment can work emergently. The internal implementation and algorithms of the MCU are not within the scope of protection of the present utility model.

[0026] In this embodiment, a connection diagram of the MCU circuit is shown, as Figure 2 shown. Figure 2 The MCU model adopted in it is STM32F103C8, which is a powerful 32-bit microcontroller with rich resources. The communication interface of the MCU supports the CAN (Controller Area Network) interface for real-time data transmission and communication. Pins 45 and 46 of the MCU are respectively connected to the receive (RX) and transmit (TX) ends of the CAN.

[0027] The power supply circuit is as Figure 3As shown in the figure, it provides a stable working voltage and current for the entire extension power supply to ensure the normal operation of the extension power supply and can output regulated power supplies with different voltage levels. The power supply circuit is also used to charge the battery when there is main power (mains electricity). When there is no main power, the battery serves as the working power supply for the system. The power supply circuit includes links such as rectification, filtering, and voltage regulation to ensure the stability of the output voltage and a small ripple coefficient. The power supply circuit includes the following parts:

[0028] 1) Rectification circuit. When the input is alternating current, the role of the rectification circuit is to convert alternating current into direct current. The rectification circuit can be composed of components such as diodes or rectifier bridges.

[0029] 2) Filtering circuit. It filters out the pulsating components in the rectified direct current to make the output voltage smoother and more stable. It can be composed of components such as capacitors and inductors.

[0030] 3) Voltage conversion circuit. It includes a DC-DC (direct current to direct current) voltage converter, which is mainly responsible for converting the DC voltage of 36V into multiple DC voltages. Figure 3 The voltage levels include 12V, 5V, and 3.3V to meet the power supply requirements of different electronic devices and future expansions. It is responsible for voltage conversion and stabilization in the system, which not only ensures the normal operation of the system equipment but also improves the overall energy efficiency and stability of the system.

[0031] 5) Power protection circuit. It protects the power supply circuit and subsequent circuits from abnormal conditions such as overcurrent, overvoltage, and short circuit. Components such as fuses, thermistors, and overvoltage protection diodes can be used. For example, Figure 3 a 5A fuse is set in it, which can meet the general usage requirements of the distributed extension power supply.

[0032] The CAN (Controller Area Network) circuit is a serial communication network that can achieve distributed real-time control, with the characteristics of stable and reliable data, small interference between lines, and strong anti-interference ability. In the extension power supply, the CAN bus is used to connect each controller and sensor to achieve fast and accurate data transmission. Through the CAN bus, the power supply system can obtain the working status information of each component in real time and make corresponding control adjustments. The CAN bus has high flexibility and scalability and can adapt to complex system structures and changing working environments. At the same time, the real-time and reliability of its data communication also provide a strong guarantee for the stable operation of the power supply system. In this embodiment, a CAN bus circuit connection diagram is shown, as Figure 4 shown, which can achieve multi-channel serial communication, improving the adaptability and processing ability of the extension power supply.

[0033] The LoopBus (ring bus) circuit is a bus circuit used for internal and downlink communication or data transmission in the extension power supply system. It is used to connect components or modules within the power supply system, as well as sensors or controllers of the fire protection system, to achieve data exchange or transmission of control signals between them. The LoopBus has the characteristics of cyclic communication or closed-loop control, which helps to improve the stability and reliability of the power supply system. In this embodiment, a connection diagram of the ring bus circuit is shown, as Figure 5 shown.

[0034] To reduce the volume and cost, the extension power supply can include a simple display unit, such as only including LED indicators. The hierarchical power supply can also include a complete display unit to be applicable to situations where more status displays are required. As Figure 6 shown, the display unit includes LED indicators, function keys, and a display screen. The LED indicators include main power, backup power, charging, emergency, fault, etc. indicators, which are used to indicate the working status of the extension power supply. The function keys include reset, annual inspection, monthly inspection, self-test, acceleration, test, mute, confirm, etc. keys. The display screen is used to display the working parameters of the extension power supply.

[0035] The extension power supply also includes a housing. The housing adopts an explosion-proof design and needs to have sufficient strength to withstand the pressure generated by internal explosions without deformation or damage. The housing is made of high-strength and corrosion-resistant materials to improve its explosion resistance and impact resistance. The housing also adopts an airtight seal design and seals the housing by methods such as melting, extrusion, or gluing to prevent external flammable gases or dust from entering the housing, thereby isolating it from the ignition source and achieving the purpose of explosion protection.

[0036] The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An explosion-proof battery extension power supply, characterized in that: It includes a microcontroller unit for core control, a power supply circuit, a controller area network circuit for connecting the controller and the sensor, a ring bus circuit for data exchange or control signal transmission, and a battery for storing electrical energy; the power supply circuit includes a rectifier circuit, a filter circuit, a voltage conversion circuit, and a power protection circuit.

2. The explosion-proof battery-powered extension power supply according to claim 1, characterized in that: The voltage conversion circuit provides 12V, 5V and 3.3V DC voltages.

3. The explosion-proof battery-powered extension power supply according to claim 1, characterized in that: It also includes a display unit, which includes an LED indicator light, function buttons and a display screen.

4. The explosion-proof battery-powered extension power supply according to claim 1, characterized in that: The controller area network circuit supports multi-channel serial port communication.

5. An explosion-proof battery-powered extension power supply according to any one of claims 1 to 4, characterized in that: Also includes explosion proof housing.

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