CN216564616U

CN216564616U - Emergency power supply

Info

Publication number: CN216564616U
Application number: CN202122555900.0U
Authority: CN
Inventors: 魏俊敏
Original assignee: Foshan Qili Lighting Appliance Co ltd
Current assignee: Foshan Qili Lighting Appliance Co ltd
Priority date: 2021-10-23
Filing date: 2021-10-23
Publication date: 2022-05-17
Anticipated expiration: 2031-10-23

Abstract

The utility model discloses an emergency power supply which comprises an MCU (microprogrammed control Unit) main control circuit, a battery pack charging and discharging circuit, a self-checking circuit, a working state indicating circuit, a high-frequency boosting inverter circuit and a switching circuit, wherein the MCU main control circuit comprises a main control circuit, a charging and discharging circuit, a self-checking circuit, a working state indicating circuit, a high-frequency boosting inverter circuit and a switching circuit; the battery pack charging and discharging circuit is electrically connected with the MCU main control circuit, the battery pack charging and discharging circuit supplies power to the MCU main control circuit, the MCU main control circuit is electrically connected with the high-frequency boosting inverter circuit, the high-frequency boosting inverter circuit and the commercial power are electrically connected with the switching circuit through the first relay, the switching circuit is electrically connected with the MCU main control circuit, and the battery pack charging and discharging circuit, the self-checking circuit and the working state indicating circuit are electrically connected in sequence. The utility model has high applicability, energy saving, good emergency capacity, automatic and manual detection functions and convenient maintenance, and ensures power supply in emergency.

Description

Emergency power supply

Technical Field

The utility model relates to the technical field of power supplies, in particular to an emergency power supply.

Background

The LED emergency lighting power supply is a core component of an LED emergency lighting lamp and generally comprises a power frequency transformer, a battery charging circuit, a mains supply detection circuit, an emergency change-over switch and a battery discharging circuit. After the input commercial power is isolated, rectified and filtered by a power frequency transformer, the converted power is then used for respectively measuring and controlling logic and power transmission, such as commercial power voltage detection, and switching between commercial power illumination and emergency illumination is controlled; such as charge and discharge management. In addition, the input commercial power is also used for lighting the LED lamp through the matched LED driving power supply to provide commercial power illumination. When the commercial power is lost, the emergency lighting is started, the battery pack discharges to provide power for the LED lamp, and the LED lamp is kept on.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical defects in the background art, the utility model provides an emergency power supply, which solves the technical problems and meets the actual requirements, and the specific technical scheme is as follows:

an emergency power supply comprises an MCU (microprogrammed control unit) main control circuit, a battery pack charging and discharging circuit, a self-checking circuit, a working state indicating circuit, a high-frequency boosting inverter circuit and a switching circuit; the battery pack charging and discharging circuit is electrically connected with the MCU main control circuit through a charging interface, the battery pack charging and discharging circuit supplies power for the MCU main control circuit through an alternating current conversion device, the MCU main control circuit provides a direct current power supply for the MCU main control circuit through pins and a high-frequency boosting inverter circuit, the high-frequency boosting inverter circuit and a mains supply are electrically connected with the switching circuit through a first relay, the first relay is arranged in the switching circuit, the switching circuit is electrically connected with the MCU main control circuit, the battery pack charging and discharging circuit, a self-checking circuit and a working state indicating circuit are electrically connected in sequence, the battery pack charging and discharging circuit is provided with a battery detection interface and a battery pack interface, and the self-checking circuit and the working state indicating circuit are electrically connected with the MCU main control circuit respectively.

As a further technical solution of the present invention, the battery pack charging circuit includes an ac conversion device and a charging and discharging device electrically connected, an input end of the ac conversion device is electrically connected to a mains supply, the battery pack charging circuit is electrically connected to a pin 8 of the MCU main control circuit through a 15V output, the charging and discharging device is provided with a battery pack interface connected to the battery pack and a battery detection interface for detecting the battery pack, the battery detection interface is connected to a pin 7 of the MCU main control circuit, and an output end of the charging and discharging device is electrically connected to the self-checking circuit.

As a further technical solution of the present invention, the self-checking circuit is provided with a dual dial and a test switch, the self-checking circuit is electrically connected to the pin 19 and the pin 17 of the MCU main control circuit through the dual dial, and the self-checking circuit is electrically connected to the pin 10 of the MCU main control circuit through one end of the test switch.

As a further technical scheme of the present invention, the working state indicating circuit is electrically connected to the pin 18 and the pin 3 of the MCU main control circuit, the working state indicating circuit is provided with a second relay, the second relay is a single-pole double-throw relay, and the second relay is connected to the output ends of the two indicator lights in the working state.

As a further technical scheme of the present invention, the high frequency boost inverter circuit is provided with an inverter, an output end of the inverter is electrically connected to the first relay, and the high frequency boost inverter circuit is connected to a pin 12, a pin 13, a pin 6, and a pin 11 of the MCU main control circuit.

As a further technical scheme of the present invention, the switching circuit includes a first relay and a load output end, the first relay is a double-pole double-throw relay, the first relay is connected to a mains supply output end or an emergency output end of the high-frequency boost inverter circuit, and an input end of the switching circuit is electrically connected to a pin 9 and a pin 14 of the MCU main control circuit.

As a further technical solution of the present invention, the main control circuit is provided with a main control chip, a resistor R40 is provided between a pin 4 and a pin 5 of the main control chip, two ends of the resistor R40 are respectively provided with a capacitor C14 and a capacitor C15, one ends of which are grounded, the main control chip is an STM32 chip, and the main control chip is an STM32 chip.

The utility model has the beneficial effects that: the alternating current conversion device converts commercial power into direct current to charge the battery pack and supply power to the main control circuit, so that the battery pack is in a dormant state under normal conditions, the performance of the battery is maintained, and the service life of the battery pack is ensured; in an emergency state, the direct current power supply of the battery pack is converted by the inverter, so that the utility model can be suitable for high-power emergency lighting, saves energy and has longer service life; in addition, the utility model has the functions of timing detection and manual detection, is convenient for detection and maintenance, and can ensure normal work in emergency.

Drawings

FIG. 1 is a block diagram of the circuit of the present invention.

Fig. 2 is an overall circuit diagram of the present invention.

FIG. 3 is a circuit diagram of the MCU master control circuit of the present invention.

Fig. 4 is a circuit diagram of the high frequency boost inverter circuit of the present invention.

Fig. 5 is a circuit diagram of a battery pack charging and discharging circuit according to the present invention.

Fig. 6 is a circuit diagram of the self-test circuit of the present invention.

Wherein: MCU master control circuit 1, main control chip 10, group battery charge and discharge circuit 2, interface 20 that charges, exchange conversion equipment 21, charging and discharging device 22, battery detection interface 220, group battery interface 221, self-checking circuit 3, two diallers 30, test switch 31, operating condition indicating circuit 4, second relay 40, pilot lamp output 41, high frequency boost inverter circuit 5, dc-to-ac converter 50, switching circuit 6, first relay 60, load output 61, commercial power 7.

Detailed Description

Embodiments of the present invention will be described with reference to the accompanying drawings and related embodiments, wherein the following embodiments are only preferred embodiments for better illustrating the present invention itself, and the embodiments of the present invention are not limited to the following embodiments, and the related essential components of the present invention in the technical field should be regarded as known in the art and known to those skilled in the art and can be understood by those skilled in the art.

Referring to fig. 1 to 6, an emergency power supply includes an MCU main control circuit 1, a battery pack charging and discharging circuit 2, a self-checking circuit 3, a working state indicating circuit 4, a high-frequency boosting inverter circuit 5, and a switching circuit 6; the battery pack charging and discharging circuit 2 is electrically connected with the MCU main control circuit 1 through a charging interface 20, the battery pack charging and discharging circuit 2 supplies power to the MCU main control circuit 1 through the alternating current conversion device 21, the MCU main control circuit 1 is electrically connected with the high-frequency boosting inverter circuit 5 through pins to provide direct-current power supply for the high-frequency boosting inverter circuit, the high-frequency boosting inverter circuit 5 and the commercial power 7 are electrically connected with the switching circuit 6 through a first relay 60, the first relay 60 is arranged in the switching circuit 6, the switching circuit 6 is electrically connected with the MCU master control circuit 1, the battery pack charging and discharging circuit 2, the self-checking circuit 3 and the working state indicating circuit 4 are electrically connected in sequence, the battery pack charging and discharging circuit 2 is provided with a battery detection interface 220 and a battery pack interface 221, the self-checking circuit 3 and the working state indicating circuit 4 are electrically connected with the MCU master control circuit 1 respectively.

It should be noted that the utility model is arranged between the commercial power 7 and the load electrical appliance, the input end of the battery pack charging and discharging circuit 2 is connected with the commercial power 7, the alternating current electrical device of the commercial power 7 is converted into direct current by the alternating current conversion device, and when the commercial power 7 is normally supplied, the battery pack charging and discharging circuit 2 enables the battery pack to be in a charging state; after the battery is charged to saturation, the battery automatically enters a standby state for maintaining electric quantity, maintains the performance and the service life of the battery, and simultaneously performs circuit detection through the self-checking circuit 3, displays the working state of the circuit through the working state indicating circuit 4, and reminds a user of the working state of the circuit. When the commercial power 7 is suddenly interrupted due to accidents such as earthquake, attack, explosion and the like or other emergency situations, the switching circuit 6 electrically connects the high-frequency boosting inverter circuit 5 with a load electrical appliance through the first relay 60, the high-frequency boosting inverter circuit is converted into a battery pack for supplying power, low-voltage direct current electric energy is provided for the high-frequency boosting inverter circuit 5, the high-frequency boosting inverter circuit is converted into an electric energy suitable for the load electrical appliance through high-frequency boosting inversion, the problem of impact on power supply equipment in emergency power supply and starting processes of the emergency power supply is solved, meanwhile, batteries with different capacities are matched through conversion of the electric energy, the emergency power is 8W-25W, the battery pack can achieve 1-5 hours of emergency lighting time, and the requirements of different occasions are met.

As shown in fig. 3, as a further technical solution of the present invention, the main control circuit is provided with a main control chip 10, a resistor R40 is provided between a pin 4 and a pin 5 of the main control chip 10, two ends of the resistor R40 are respectively provided with a capacitor C14 and a capacitor C15, one ends of which are grounded, the main control chip 10 is an STM32 chip, and the main control chip 10 is an STM32 chip.

As shown in fig. 2 and fig. 4, as a further technical solution of the present invention, the battery pack charging circuit includes an ac conversion device 21 and a charging and discharging device 22, an input end of the ac conversion device 21 is electrically connected to a commercial power 7, the charging and discharging device 22 is electrically connected to a pin 8 of the MCU main control circuit 1 through a charging interface 20, the charging and discharging device 22 is provided with a battery pack interface 221 connected to the battery pack and a battery detection interface 220 for detecting the battery pack, the battery detection interface 220 is connected to the pin 7 of the MCU main control circuit 1, and an output end of the charging and discharging device 22 is electrically connected to the self-test circuit 3.

It should be noted that, the ac conversion device 21 of the battery pack charging and discharging circuit 2 of the present invention converts the ac power of the commercial power 7 into the dc power suitable for supplying power to the MCU main control circuit 1 and charging the battery pack, and the ac conversion device 21 is a low-power dc power supply that only needs to supply a charging current corresponding to 10% of the battery pack capacity Ah to the battery pack, and does not have the capability of directly supplying the dc power to the high-frequency boost inverter circuit 5. The MCU main control circuit 1 is electrically connected with the battery detection interface 220 through a pin 7, and is used for the MCU main control circuit 1 to detect the working states of the battery pack and the battery pack charging and discharging circuit 2, so that the MCU main control circuit 1 can accurately detect whether the commercial power 7 is cut off or not and the charging state of the battery pack.

Referring to fig. 2 and 6, as a further technical solution of the present invention, the self-checking circuit 3 is provided with a dual dial 30 and a test switch 31, the self-checking circuit 3 is electrically connected to the pin 19 and the pin 17 of the MCU main control circuit 1 through the dual dial 30, and one end of the self-checking circuit 3 is electrically connected to the pin 10 of the MCU main control circuit 1 through the test switch 31.

Referring to fig. 2 and fig. 6, as a further technical solution of the present invention, the working state indicating circuit 4 is electrically connected to the pin 18 and the pin 3 of the MCU main control circuit 1, the working state indicating circuit 4 is provided with a second relay 40, the second relay 40 is a single-pole double-throw relay, and the second relay 40 is connected to two indicator light output ends 41 in a working state.

It should be noted that, the self-checking circuit 3 of the present invention is provided with the dual dial 30 and the testing switch 31, and the dual dial 30 and the testing switch 31 are electrically connected to the main control chip 10, so that a user can set the main control chip 10, so that the present invention has a self-checking function by setting the dual dial 30, and at the same time, the user can manually press the testing switch 31 to manually test the working state of the present invention, the self-checking circuit 3 is electrically connected to the working state indicating circuit 4, the condition detected by the self-checking circuit 3 is transmitted to the control chip, the second relay 40 of the working state indicating circuit 4 controlled by the control chip is communicated with the indicator light output terminal 41 of the working state indicating circuit 4, and different working states are displayed by communicating different indicator light output terminals 41, the user can clearly know the working state of the utility model.

Referring to fig. 1 to 3, as a further technical solution of the present invention, the high frequency boost inverter circuit 5 is provided with an inverter 50, an output end of the inverter 50 is electrically connected to the first relay 60, and the high frequency boost inverter circuit 5 is connected to the pin 12, the pin 13, the pin 6, and the pin 11 of the MCU main control circuit 1.

Referring to fig. 1 to 4, as a further technical solution of the present invention, the switching circuit 6 includes a first relay 60 and a load output end 61, the first relay 60 is a double-pole double-throw relay, the first relay 60 is connected to an output end of the commercial power 7 or an emergency output end of the high-frequency boost inverter circuit 5, and an input end of the switching circuit 6 is electrically connected to the pin 9 and the pin 14 of the MCU main control circuit 1.

It should be noted that, the high-frequency boost inverter circuit 5 of the present invention is electrically connected to the MCU main control circuit 1, when the MCU main control circuit 1 detects the power failure of the commercial power 7 or the voltage of the commercial power 7 exceeding the rated input voltage of ± 15% or ± 20%, the battery pack is controlled to provide a low-voltage dc power to the high-frequency boost inverter circuit 5 through the MCU main control circuit 1, the high-frequency boost inverter circuit 5 converts the low-voltage dc power into a high-frequency ac power through the inverter 50, and at the same time, the MCU main control circuit 1 controls the switching circuit 6 to switch the first relay 60 from the state of being communicated with the commercial power 7 to the state of being communicated with the output end of the high-frequency boost inverter circuit 5, so that the ac power converted by the high-frequency boost inverter circuit 5 is provided to the load output end 61 to supply power to the load electrical appliance, thereby ensuring long-time operation in emergency, provides a good escape environment for people. Under normal conditions, under the logic regulation and control of the main control chip 10, the inverter 50 stops working and is in an automatic shutdown state, and the power supply actually used by the load electric appliance is the commercial power 7 from the power grid. When commercial power 7 voltage resumes normal work, MCU main control circuit 1 control inverter 50 carries out the automatic shutdown operation, simultaneous control first relay 60 is followed inverter 50 supplies power to changing into commercial power 7 and exchanging the power supply, and load electrical apparatus replies commercial power 7 power supply, and in addition, MCU main control circuit 1 control group battery charge and discharge circuit 2 fills commercial power 7 and exchanges the bypass and do the group battery charges.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An emergency power supply is characterized by comprising an MCU (microprogrammed control unit) main control circuit (1), a battery pack charging and discharging circuit (2), a self-checking circuit (3), a working state indicating circuit (4), a high-frequency boosting inverter circuit (5) and a switching circuit (6); the battery pack charging and discharging circuit (2) is electrically connected with the MCU main control circuit (1) through a charging interface (20), the battery pack charging and discharging circuit (2) supplies power for the MCU main control circuit (1) through an alternating current conversion device (21), the MCU main control circuit (1) is electrically connected with the high-frequency boosting inverter circuit (5) through pins to provide a direct current power supply for the MCU main control circuit, the high-frequency boosting inverter circuit (5) is electrically connected with a mains supply (7) through a first relay (60) and a switching circuit (6), the first relay (60) is arranged in the switching circuit (6), the switching circuit (6) is electrically connected with the MCU main control circuit (1), the battery pack charging and discharging circuit (2), a self-checking circuit (3) and a working state indicating circuit (4) are electrically connected in sequence, the battery pack charging and discharging circuit (2) is provided with a battery detection interface (220) and a battery pack interface (221), the self-checking circuit (3) and the working state indicating circuit (4) are respectively electrically connected with the MCU master control circuit (1).

2. The emergency power supply according to claim 1, wherein the main control circuit is provided with a main control chip (10), a resistor R40 is arranged between a pin 4 and a pin 5 of the main control chip (10), two ends of the resistor R40 are respectively provided with a capacitor C14 and a capacitor C15, one ends of the capacitors are grounded, and the main control chip (10) is an STM32 chip.

3. The emergency power supply according to claim 1, wherein the battery pack charging and discharging circuit comprises an alternating current conversion device (21) and a charging and discharging device (22) which are electrically connected, an input end of the alternating current conversion device (21) is electrically connected with a mains supply (7), the charging and discharging device (22) is electrically connected with a pin 8 of the MCU main control circuit (1) through a charging interface (20), the charging and discharging device (22) is provided with a battery pack interface (221) connected with the battery pack and a battery detection interface (220) used for detecting the battery pack, the battery detection interface (220) is connected with the pin 7 of the MCU main control circuit (1), and an output end of the charging and discharging device (22) is electrically connected with the self-checking circuit (3).

4. The emergency power supply according to claim 1, wherein the self-checking circuit (3) is provided with a dual-dial-up device (30) and a test switch (31), the self-checking circuit (3) is electrically connected with the pin 19 and the pin 17 of the MCU main control circuit (1) through the dual-dial-up device (30), and one end of the self-checking circuit (3) is electrically connected with the pin 10 of the MCU main control circuit (1) through the test switch (31).

5. The emergency power supply according to claim 1, wherein the working state indicating circuit (4) is electrically connected with the pin 18 and the pin 3 of the MCU main control circuit (1), the working state indicating circuit (4) is provided with a second relay (40), the second relay (40) is a single-pole double-throw relay, and the second relay (40) is connected with two indicator light output ends (41) of the working state.

6. The emergency power supply according to claim 1, wherein the high-frequency boost inverting circuit (5) is provided with an inverter (50), an output end of the inverter (50) is electrically connected with the first relay (60), and the high-frequency boost inverting circuit (5) is connected with a pin 12, a pin 13, a pin 6 and a pin 11 of the MCU main control circuit (1).

7. The emergency power supply according to claim 1, wherein the switching circuit (6) comprises a first relay (60) and a load output terminal (61), the first relay (60) is a double-pole double-throw relay, the first relay (60) is connected with an output terminal of a mains supply (7) or an emergency output terminal of the high-frequency boost inverter circuit (5), and an input terminal of the switching circuit (6) is electrically connected with a pin 9 and a pin 14 of the MCU main control circuit (1).