Dual power supply emergency lighting control circuit and dual power supply emergency lighting system

Abstract

The invention provides a dual-power emergency lighting control circuit and a dual-power emergency lighting system. The dual-power emergency lighting control circuit comprises an emergency lighting management module, a first AC / DC converter, and a second AC / DC converter; an enable output end of the emergency lighting management module is electrically connected to an enable end of the first AC / DC converter, an input end thereof is electrically connected to an output end of the second AC / DC converter, a detection end thereof is used to be electrically connected to a power supply line group consisting of one end of a switch and an AC neutral line, and electrically connect an emergency LED and a battery; the other end of the switch is electrically connected to an AC live line; the first AC / DC converter is also used to electrically connect the lighting LED and the power supply line group; the second AC / DC converter is also used to electrically connect to the power supply line group; the emergency lighting management module detects a grid voltage and a state of a switch, and enriches the emergency lighting control scheme and improves applicability by adding a charging mode for turning off a lighting LED when the battery is charged and a conduction standby mode for turning off the emergency LED when the grid voltage is out of power.

Description

Technical Field

[0001] The present invention relates to the field of circuit technology, and in particular to a dual-power emergency lighting control circuit and a dual-power emergency lighting system. Background Art

[0002] In a simple controlled emergency lighting system, the emergency lighting system controls the working state of the lamps through a switch. Figure 1 In the emergency lighting system shown, the following situations are divided:

[0003] When the grid voltage Vac is normal, if the switch is in the off state, the emergency LED and the lighting LED are both in the off state (off-standby mode); if the switch is in the on state, the lighting LED is in the working state, powered by the grid voltage Vac, and the emergency / battery management (BMS) module detects that the grid voltage Vac is normal, so the emergency LED is in the off state (main lighting mode).

[0004] In the case of a power outage in the grid voltage Vac, if the switch is in the off state, the lighting LED is in the off state due to the lack of power supply. The emergency / battery management (BMS) module then detects that the switch is in the off state and is also turned off (off-standby mode); if the switch is in the on state, since there is no AC voltage in the grid, the lighting LED still has no power supply and is in the off state. The emergency / battery management (BMS) module then detects that the switch is in the on state and the emergency LED starts working (emergency lighting mode).

[0005] exist Figure 1 In the emergency lighting system shown, the switch can control the working state of the emergency lighting system when the grid voltage Vac is normal or when the power is off. When the grid voltage Vac is on, the switch controls the working state of the lighting LED; when the grid voltage Vac is off, the switch controls the working state of the emergency LED, and the lighting LED is always in the off state because the grid has no power supply. Figure 1 In the emergency lighting system, a power supply is also provided to charge the battery. This power supply is output from the AC / DC converter of the main lighting module. That is, the DC current output by the AC / DC converter of the main lighting module not only supplies power to the LED load of the main lighting, i.e., the lighting LED, but also charges the battery of the emergency lighting system.

[0006] from Figure 1It can be seen that when the grid voltage Vac is normal and the switch is turned on, the AC / DC converter charges the battery and supplies power to the lighting LED, and the main lighting LED load, i.e., the lighting LED, is always lit. The existing emergency lighting system cannot only charge the battery without supplying power to the lighting LED, and it must enter the emergency lighting mode when the power is off. The working mode is single and the applicability needs to be further improved.

[0007] Therefore, it is necessary to provide an emergency lighting control solution that can only charge the battery without powering the lighting LED, and does not automatically enter the emergency lighting mode when the power is cut off in this situation. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides a dual-power emergency lighting control circuit, comprising: an emergency lighting management module, a first AC / DC converter, and a second AC / DC converter;

[0009] The enable output terminal of the emergency lighting management module is electrically connected to the enable terminal of the first AC / DC converter, the input terminal thereof is electrically connected to the output terminal of the second AC / DC converter, the detection terminal thereof is used to be electrically connected to a power supply line group consisting of one end of a switch and an AC neutral line, the output terminal thereof is used to be electrically connected to an emergency LED, and the battery terminal thereof is used to be electrically connected to a battery;

[0010] The other end of the switch is electrically connected to the AC live wire;

[0011] The output end of the first AC / DC converter is used to electrically connect to the lighting LED, and the input end thereof is used to electrically connect to the power supply line set;

[0012] The input end of the second AC / DC converter is used to be electrically connected to the power supply line set;

[0013] The emergency lighting management module detects the grid voltage and the state of the switch through its detection terminal. When the switch is in the off state, the first AC / DC converter and the second AC / DC converter are not powered, and the emergency lighting management module controls the output terminal and the battery terminal to be cut off, and the emergency lighting management module is in the off standby mode.

[0014] When the emergency lighting management module is in the cut-off standby mode, if the switch is switched to the on state and the grid voltage is normal, the emergency lighting management module controls the second AC / DC converter to charge the battery through its input end, controls the output end of the first AC / DC converter to power the lighting LED through its enable output end, and the emergency lighting management module switches to the main lighting mode;

[0015] When the emergency lighting management module is in the main lighting mode, if the switch is switched from the on state to the off state within a preset time period and finally switches to the on state, the emergency lighting management module controls the output end of the first AC / DC converter through its enable output end not to supply power to the lighting LED, and the emergency lighting management module enters the charging mode;

[0016] When the emergency lighting management module is in the charging mode, if the grid voltage fails, the emergency lighting management module controls the output terminal and the battery terminal to continue to be cut off, and the emergency lighting management module enters the on-standby mode.

[0017] In a possible implementation, when the emergency lighting management module is in the charging mode, if the switch switches from the on state to the off state within a preset time period and finally switches back to the on state, the emergency lighting management module switches to the main lighting mode.

[0018] In one possible implementation, when the emergency lighting management module is in the cut-off standby mode, if the switch is switched to the on state and the grid voltage is out of power, the first AC / DC converter and the second AC / DC converter are not powered, the emergency lighting management module controls the connection between its output end and the battery end, and the emergency lighting management module enters the emergency lighting mode.

[0019] In a possible implementation, when the emergency lighting management module is in the main lighting mode, if the grid voltage fails, the emergency lighting management module switches to the emergency lighting mode.

[0020] In a possible implementation, when the emergency lighting management module is in the emergency lighting mode, if the grid voltage returns to normal, the emergency lighting management module switches to the main lighting mode.

[0021] In a possible implementation, when the emergency lighting management module is in the on-standby mode, if the switch is switched to the off-state, the emergency lighting management module is switched to the off-standby mode.

[0022] In a possible implementation, when the emergency lighting management module is in the on-standby mode, if the grid voltage returns to normal, the emergency lighting management module switches to the charging mode.

[0023] In a possible implementation, the emergency lighting management module includes an AC voltage detection unit, a switch detection unit, an emergency management unit, a battery management unit, and an AC / DC control unit;

[0024] The output terminal of the AC / DC control unit serves as the enabling output terminal of the emergency lighting management module;

[0025] The input end of the battery management unit serves as the input end of the emergency lighting management module;

[0026] The input end of the AC voltage detection unit and the input end of the switch detection unit are connected in parallel and serve as the detection end of the emergency lighting management module;

[0027] The output end of the emergency management unit serves as the output end of the emergency lighting management module;

[0028] The battery terminal of the battery management unit serves as the battery terminal of the emergency lighting management module;

[0029] The AC voltage detection unit, the switch detection unit, the battery management unit, and the AC / DC control unit are electrically connected to the emergency management unit respectively;

[0030] The AC voltage detection unit is used to detect the grid voltage;

[0031] The switch detection unit is used to detect the state of the switch;

[0032] The emergency management unit is used to control the battery management unit to perform charging or discharging control on the battery according to the grid voltage and the state of the switch, control the AC / DC control unit to output an enable signal, and control whether the emergency LED performs emergency lighting action.

[0033] In a possible implementation manner, the output of the first AC / DC converter is a constant current output, and the output of the second AC / DC converter is a constant voltage output.

[0034] The present invention also provides a dual power emergency lighting system, comprising a switch, an emergency LED, a battery, a lighting LED and the dual power emergency lighting control circuit as described above;

[0035] The switch, the emergency LED, the battery, and the lighting LED are electrically connected to the dual-power emergency lighting control circuit respectively.

[0036] The technical solution provided by the present invention has at least the following beneficial effects:

[0037] By adding the charging mode and the conduction standby mode, the second AC / DC converter can work alone to charge the battery without lighting the lighting LED. At the same time, in the charging mode, when a power outage occurs, the charging mode switches to the conduction standby mode to avoid automatically entering the emergency lighting mode. This enriches the emergency lighting control solution and improves applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The circuit schematic diagram of the existing emergency lighting system;

[0039] Figure 2 A circuit schematic diagram of a dual-power emergency lighting control circuit provided by an embodiment of the present invention;

[0040] Figure 3 A circuit schematic diagram of an emergency lighting management module provided by an embodiment of the present invention;

[0041] In the accompanying drawings, 10, emergency lighting management module; 20, first AC / DC converter; 30, second AC / DC converter; 40, switch; 50, emergency LED; 60, battery; 70, lighting LED; 101, AC voltage detection unit; 102, switch detection unit; 103, emergency management unit; 104, battery management unit; 105, AC / DC control unit. DETAILED DESCRIPTION

[0042] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0043] Please refer to Figure 2 , a dual-power emergency lighting control circuit provided by the present invention includes: an emergency lighting management module 10, a first AC / DC converter 20, and a second AC / DC converter 30;

[0044] The enabling output terminal of the emergency lighting management module 10 is electrically connected to the enabling terminal of the first AC / DC converter 20, the input terminal thereof is electrically connected to the output terminal of the second AC / DC converter 30, the detection terminal thereof is used to be electrically connected to a power supply line group consisting of one end of the switch 40 and the AC neutral line N, the output terminal thereof is used to be electrically connected to the emergency LED 50, and the battery terminal thereof is used to be electrically connected to the battery 60;

[0045] The other end of the switch 40 is electrically connected to the AC live wire L;

[0046] The output end of the first AC / DC converter 20 is used to electrically connect to the lighting LED 70, and the input end thereof is used to electrically connect to the power supply line set;

[0047] The input end of the second AC / DC converter 30 is used to be electrically connected to the power supply line set;

[0048] The emergency lighting management module 10 detects the grid voltage Vac and the state of the switch 40 through its detection terminal. When the switch 40 is in the off state, the first AC / DC converter 20 and the second AC / DC converter 30 are not powered, and the emergency lighting management module 10 controls the output terminal and the battery terminal to be cut off, and the emergency lighting management module 10 is in the off standby mode;

[0049] When the emergency lighting management module 10 is in the cut-off standby mode, if the switch 40 is switched to the on state and the grid voltage Vac is normal, the emergency lighting management module 10 controls the second AC / DC converter 30 to charge the battery 60 through its input end, and controls the output end of the first AC / DC converter 20 to power the lighting LED 70 through its enable output end, and the emergency lighting management module 10 switches to the main lighting mode;

[0050] When the emergency lighting management module 10 is in the main lighting mode, if the switch 40 switches from the on state to the off state within a preset time period and finally switches to the on state, the emergency lighting management module 10 controls the output end of the first AC / DC converter 20 through its enable output end not to supply power to the lighting LED 70, and the emergency lighting management module 10 enters the charging mode;

[0051] When the emergency lighting management module 10 is in the charging mode, if the grid voltage Vac fails, the emergency lighting management module 10 controls the connection between its output terminal and the battery terminal to continue to be cut off, and the emergency lighting management module 10 enters the on-standby mode.

[0052] In this embodiment, the emergency lighting management module 10 can add an enable output function on the basis of the conventional design to realize the enable control of the first AC / DC converter 20. The first AC / DC converter 20 can be formed by combining a conventional AC / DC converter and an enable control switch unit, which is used to realize the conversion of AC input to DC output and drive the main lighting LED, that is, the lighting LED 70. The switch unit here can be a combination of a transistor and a relay. The second AC / DC converter 30 can adopt a conventional AC / DC converter, which is used to realize the conversion of AC input to DC output and can provide power for charging the battery 60. The first AC / DC converter 20 and the second AC / DC converter 30 adopt a switch mode AC / DC converter, or a linear working mode AC / DC converter. The switch 40 is a conventional model, which is used to control the switching of different working modes, and is the system master control switch, which is used to control the power supply and control of the entire emergency lighting system. The emergency LED 50 is a conventional LED for emergency lighting. The battery 60 is a conventional rechargeable battery in the field of emergency lighting, and a lithium battery can be used. The lighting LED 70 is a conventional LED for lighting.

[0053] Through the dual power emergency lighting control circuit of the present invention, in the dual power emergency lighting system controlled only by the switch 40, its working state can be changed according to the state of the switch 40 and the state of the AC power supply, and a charging mode and a conduction standby mode are added. The charging mode enables the dual power emergency lighting system to turn off the main lighting AC / DC, i.e., the first AC / DC converter 20, and the conduction standby mode prevents the dual power emergency lighting system from automatically entering the emergency lighting mode when a power outage occurs. When the dual power emergency lighting system needs to be in the charging mode working state, the output of the main lighting AC / DC converter, i.e., the first AC / DC converter 20, is turned off, and the output of the second AC / DC, i.e., the second AC / DC converter 30, is retained to charge the battery 60 of the dual power emergency lighting system.

[0054] It should be noted that when the switch 40 is turned off, regardless of whether the grid voltage is out of power, the system's lighting LED 70 and emergency LED 50 are not lit, the first AC / DC converter 20 and the second AC / DC converter 30 are not powered and are in the off state. At this time, the system operates in the cut-off standby mode.

[0055] In a possible implementation, when the emergency lighting management module 10 is in the charging mode, if the switch 40 switches from the on state to the off state within a preset time period and finally switches back to the on state, the emergency lighting management module 10 switches to the main lighting mode.

[0056] In a possible implementation, when the emergency lighting management module 10 is in the cut-off standby mode, if the switch 40 is switched to the on state and the grid voltage Vac is out of power, the first AC / DC converter 20 and the second AC / DC converter 30 are both unpowered, and the emergency lighting management module 10 controls the connection between its output terminal and the battery terminal, and the emergency lighting management module 10 enters the emergency lighting mode.

[0057] In a possible implementation, when the emergency lighting management module 10 is in the main lighting mode, if the grid voltage Vac fails, the emergency lighting management module 10 switches to the emergency lighting mode.

[0058] In a possible implementation, when the emergency lighting management module 10 is in the emergency lighting mode, if the grid voltage Vac returns to normal, the emergency lighting management module 10 switches to the main lighting mode.

[0059] In a possible implementation, when the emergency lighting management module 10 is in the on-standby mode, if the switch 40 is switched to the off-state, the emergency lighting management module 10 is switched to the off-standby mode.

[0060] In a possible implementation, when the emergency lighting management module 10 is in the on-standby mode, if the grid voltage Vac returns to normal, the emergency lighting management module 10 switches to the charging mode.

[0061] In this embodiment, when the switch 40 is turned on, for different AC grid states, the system operating states are divided into a situation when the grid voltage Vac is normal and the switch 40 is turned on and a situation when the grid voltage Vac is off and the switch 40 is turned on.

[0062] When the grid voltage Vac is normal and the switch 40 is turned on, the system has a main lighting mode and a charging mode.

[0063] Main lighting mode: when the grid voltage Vac is normal, the AC / DC converter of the first main lighting, i.e., the first AC / DC converter 20, is in working state, and the LED load of the main lighting, i.e., the lighting LED 70, is lit; the second AC / DC converter, i.e., the second AC / DC converter 30, is in working state, and the battery management system in the emergency lighting management module 10 is in working state. At this time, the system is lighting the lighting LED 70 while also charging the battery 60.

[0064] Charging mode: when the grid voltage Vac is normal, the AC / DC converter of the first main lighting is in the off state, and the LED load of the main lighting is not lit; the second AC / DC converter is in the working state, and the battery management system is in the working state. At this time, the system does not light up the lighting LED 70, but is charging the battery 60.

[0065] The switching between the main lighting mode and the charging mode is achieved by fast switching of the switch 40 when the AC power grid is normal. For example, when the system is in the main lighting mode, if it is detected that the state change sequence of the switch 40 in a certain period of time is ON-OFF-ON, that is, when the AC voltage signal is detected as "present-absent-present", the system is placed in the charging mode.

[0066] When the grid voltage Vac is out of power and the switch 40 is turned on, the system has an emergency working mode and a conduction standby mode.

[0067] Emergency working mode: When the grid voltage Vac is powered off, the AC / DC converter of the first main lighting is in a power-off state, and the LED load of the main lighting is not lit; the second AC / DC converter is in a power-off state and cannot charge the battery 60. The emergency LED 50 is in a lit state. In a specific implementation, the condition for entering this working mode is: in the cut-off standby mode, when the system detects that the switch 40 is turned on and the grid is out of power, the system will enter the emergency lighting mode.

[0068] On-standby mode: When the grid voltage Vac is powered off, the AC / DC converter of the first main lighting is in a no-power state, and the LED load of the main lighting is not lit; the second AC / DC converter is in a no-power state and cannot charge the battery 60. The emergency LED 50 is in a non-lit state. In a specific implementation, the entry condition of the on-standby mode is: first, when the system is working in the charging mode, a power outage occurs in the grid, then the switch 40 does not change its state during the entire process from normal power supply to power outage, that is, it has not been manually controlled, then the system enters the on-standby mode. In a specific implementation, the condition for exiting the on-standby mode is: in the on-standby working mode, the switch state of the system changes, that is, the switch 40 changes from the on state to the off state, then the system exits the on-standby mode. Since the switch 40 is in the off state at this time, the system exits the on-standby mode and enters the off-standby mode.

[0069] In one possible implementation, Figure 3 , the emergency lighting management module 10 includes an AC voltage detection unit 101, a switch detection unit 102, an emergency management unit 103, a battery management unit 104, and an AC / DC control unit 105;

[0070] The output terminal of the AC / DC control unit 105 serves as the enabling output terminal of the emergency lighting management module 10;

[0071] The input end of the battery management unit 104, i.e., the BMS, serves as the input end of the emergency lighting management module 10;

[0072] The input end of the AC voltage detection unit 101 and the input end of the switch detection unit 102 are connected in parallel to serve as the detection end of the emergency lighting management module 10;

[0073] The output end of the emergency management unit 103 serves as the output end of the emergency lighting management module 10;

[0074] The battery end of the battery management unit 104 serves as the battery end of the emergency lighting management module 10;

[0075] The AC voltage detection unit 101, the switch detection unit 102, the battery management unit 104, and the AC / DC control unit 105 are electrically connected to the emergency management unit 103 respectively;

[0076] The AC voltage detection unit 101 is used to detect the grid voltage Vac;

[0077] The switch detection unit 102 is used to detect the state of the switch 40;

[0078] The emergency management unit 103 is used to control the battery management unit 104 to perform charging or discharging control on the battery 60 according to the grid voltage Vac and the state of the switch 40, control the AC / DC control unit 105 to output an enable signal EN, and control whether the emergency LED 50 performs emergency lighting action.

[0079] In this embodiment, the AC voltage detection unit 101 adopts a conventional design, which is used to detect the grid voltage Vac, that is, to detect the AC state of the grid, and transmit the corresponding information to the emergency management unit 103. The switch detection unit 102 adopts a conventional design, which is used to detect the state of the switch 40, and transmit the corresponding information to the emergency management unit 103. The output of the AC voltage detection unit 101 and the switch detection unit 102 together determine the working mode of the emergency lighting management module 10, that is, the working state of the dual power supply system using the dual power supply emergency lighting control circuit of the present invention. The battery management unit 104 is used to control the charging and discharging functions of the battery 60, including a battery charging management module, an overcurrent and output short circuit protection module, and a battery over-discharge protection module. The AC / DC control unit 105 can control the enabling of the first AC / DC converter 20 according to the current working state of the emergency management unit 103, the state of the switch 40, and the state of the grid voltage Vac, so as to achieve that when the first AC / DC converter 20 is turned off, only the second AC / DC converter 30 is kept working, and the main road LED lighting is turned off, that is, the lighting LED 70 is turned off. The emergency management unit 103 can control the enabling of the emergency LED 50 according to the current working state, the state of the switch 40 and the state of the grid voltage Vac, so that when the system is in an AC power outage, the emergency lighting system is in a reasonable working state, avoiding the system from entering an emergency state when it is not necessary to start the emergency, or entering an emergency state without the knowledge of the customer.

[0080] In a possible implementation, the output of the first AC / DC converter 20 is a constant current output, and the output of the second AC / DC converter 30 is a constant voltage output.

[0081] In this embodiment, the constant current output is used to drive the load LED, namely the lighting LED 70, and the constant voltage output is used to charge the battery 60 of the emergency lighting system or to supply power to other modules requiring a DC voltage.

[0082] The present invention also provides a dual power emergency lighting system, comprising a switch 40, an emergency LED 50, a battery 60, an illumination LED 70 and the dual power emergency lighting control circuit as described above;

[0083] The switch 40 , the emergency LED 50 , the battery 60 , and the lighting LED 70 are electrically connected to the dual-power emergency lighting control circuit, respectively.

[0084] The above embodiments should not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent conversion shall fall within the protection scope of the present invention.

Claims

1. A dual power supply emergency lighting control circuit, characterized in that: include: Emergency lighting management module, first AC / DC converter, second AC / DC converter; The enable output terminal of the emergency lighting management module is electrically connected to the enable terminal of the first AC / DC converter, the input terminal thereof is electrically connected to the output terminal of the second AC / DC converter, the detection terminal thereof is used to be electrically connected to a power supply line group consisting of one end of a switch and an AC neutral line, the output terminal thereof is used to be electrically connected to an emergency LED, and the battery terminal thereof is used to be electrically connected to a battery; The other end of the switch is electrically connected to the AC live wire; The output end of the first AC / DC converter is used to electrically connect to the lighting LED, and the input end thereof is used to electrically connect to the power supply line set; The input end of the second AC / DC converter is used to be electrically connected to the power supply line set; The emergency lighting management module detects the grid voltage and the state of the switch through its detection terminal. When the switch is in the off state, the first AC / DC converter and the second AC / DC converter are not powered, and the emergency lighting management module controls the output terminal and the battery terminal to be cut off, and the emergency lighting management module is in the off standby mode. When the emergency lighting management module is in the cut-off standby mode, if the switch is switched to the on state and the grid voltage is normal, the emergency lighting management module controls the second AC / DC converter to charge the battery through its input end, controls the output end of the first AC / DC converter to power the lighting LED through its enable output end, and the emergency lighting management module switches to the main lighting mode; When the emergency lighting management module is in the main lighting mode, if the switch is switched from the on state to the off state within a preset time period and finally switches to the on state, the emergency lighting management module controls the output end of the first AC / DC converter through its enable output end not to supply power to the lighting LED, and the emergency lighting management module enters the charging mode; When the emergency lighting management module is in the charging mode, if the grid voltage fails, the emergency lighting management module controls the connection between its output terminal and the battery terminal to continue to be cut off, and the emergency lighting management module enters the on-standby mode; When the emergency lighting management module is in the cut-off standby mode, if the switch is switched to the on state and the grid voltage is out of power, the first AC / DC converter and the second AC / DC converter are not powered, the emergency lighting management module controls the output terminal and the battery terminal to be connected, and the emergency lighting management module enters the emergency lighting mode; When the emergency lighting management module is in the main lighting mode, if the grid voltage fails, the emergency lighting management module switches to the emergency lighting mode.

2. The dual power emergency lighting control circuit according to claim 1, characterized in that: When the emergency lighting management module is in the charging mode, if the switch is switched from the on state to the off state within a preset time period and finally switches back to the on state, the emergency lighting management module switches to the main lighting mode.

3. The dual power emergency lighting control circuit according to claim 1, characterized in that: When the emergency lighting management module is in the emergency lighting mode, if the grid voltage returns to normal, the emergency lighting management module switches to the main lighting mode.

4. The dual power emergency lighting control circuit according to claim 1, characterized in that: When the emergency lighting management module is in the on-standby mode, if the switch is switched to the off-state, the emergency lighting management module switches to the off-standby mode.

5. The dual power emergency lighting control circuit according to claim 1, characterized in that: When the emergency lighting management module is in the on-standby mode, if the grid voltage returns to normal, the emergency lighting management module switches to the charging mode.

6. The dual power emergency lighting control circuit according to claim 1, characterized in that: The emergency lighting management module includes an AC voltage detection unit, a switch detection unit, an emergency management unit, a battery management unit, and an AC / DC control unit; The output terminal of the AC / DC control unit serves as the enabling output terminal of the emergency lighting management module; The input end of the battery management unit serves as the input end of the emergency lighting management module; The input end of the AC voltage detection unit and the input end of the switch detection unit are connected in parallel and serve as the detection end of the emergency lighting management module; The output end of the emergency management unit serves as the output end of the emergency lighting management module; The battery terminal of the battery management unit serves as the battery terminal of the emergency lighting management module; The AC voltage detection unit, the switch detection unit, the battery management unit, and the AC / DC control unit are electrically connected to the emergency management unit respectively; The AC voltage detection unit is used to detect the grid voltage; The switch detection unit is used to detect the state of the switch; The emergency management unit is used to control the battery management unit to perform charging or discharging control on the battery according to the grid voltage and the state of the switch, control the AC / DC control unit to output an enable signal, and control whether the emergency LED performs emergency lighting action.

7. The dual power emergency lighting control circuit according to claim 1, characterized in that: The output of the first AC / DC converter is a constant current output, and the output of the second AC / DC converter is a constant voltage output.

8. A dual power emergency lighting system, characterized in that: comprising a switch, an emergency LED, a battery, a lighting LED and a dual power emergency lighting control circuit as claimed in any one of claims 1 to 7; The switch, the emergency LED, the battery, and the lighting LED are electrically connected to the dual-power emergency lighting control circuit respectively.

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