A high voltage LED light strip emergency power supply

Abstract

A high-voltage LED light strip emergency power supply, the input end is used to input the neutral and live wires, and the output circuit supplies power to the lamp after filtering. At the same time, the filtering circuit also charges the battery with part of the voltage through the switch charging circuit. Since the switch charging circuit is also connected to the inverter circuit, in this way, charging can only be started when the switch charging circuit is working, and the output of the inverter circuit is cut off, so that the battery is fully charged. When the power is off, the switch charging circuit stops outputting, and the battery is inverted and boosted through the inverter circuit. The constant current and voltage of the voltage stabilizing circuit can provide stable output current and voltage to the output module, and then the LED lamp can continue to work, which can ensure the safe evacuation and evacuation time, and at the same time ensure that the security personnel have time to conduct safety inspections. Since there is no feedback circuit in the battery power supply circuit, the battery can output high power to ensure continuous high-voltage output lighting of the lamp.

Description

Technical Field

[0001] The invention relates to the field of lighting, and in particular to a high-voltage LED light strip emergency power supply. Background Art

[0002] In many special places, such as elevators, stairs, long corridors, shopping mall aisles, building lifts, etc., the structure is long and frequently used. If there is no lighting during a power outage, it is very unsafe. Therefore, we need emergency lighting products that are simple to install and very economical. However, because these special places require large areas of lighting, the power required for normal lighting will be large and more, and the cost will be high.

[0003] The existing emergency power supply and lamps use a single inverter circuit. When there is mains power, they cannot be used as normal lighting power at the same time, and can only charge the emergency power supply battery. When the mains power is off, the emergency power supply starts to supply power for lighting, but due to the size limitation of the lamp body, it can only be used in designated emergency exits and aisles, which has great limitations.

[0004] The power supply and lamps for normal lighting and the power supply and lamps for emergency lighting are set separately, which complicates the installation and increases the cost. Due to the limitation of the lamp size, the emergency lighting lamps have a short emergency power supply time, which cannot give security personnel time to re-determine whether the personnel should evacuate, leaving hidden dangers for safety work. At the same time, the lamps must be installed prominently, and the size is too large, which affects the space and appearance. Summary of the invention

[0005] To solve the above problems, the technical solution provides a high-voltage LED light strip emergency power supply, which can provide stable output current and voltage, and change its emergency power supply controller. While basically maintaining the same size as the original power supply, the lighting brightness is only 10% of the normal lighting, which can ensure safe evacuation and evacuation time, while ensuring that security personnel have time to conduct safety checks. The total emergency power supply time reaches 2 hours.

[0006] To achieve the above purpose, the technical solution is as follows:

[0007] A high-voltage LED light strip emergency power supply, comprising:

[0008] Input terminal, used to input the neutral and live wires;

[0009] A filter circuit connected to the input terminal;

[0010] An output circuit, connected to the output end of the filter circuit, for outputting voltage to illuminate the lamp;

[0011] A switch charging circuit, one end of which is connected to the output end of the filter circuit and the other end of which is connected to the battery BT1, for opening or closing the connection between the filter circuit and the battery BT1;

[0012] An inverter circuit is connected to the output end of the battery BT1 and is also connected to the output circuit to boost the voltage of the battery BT1 to supply power to the lamp through the output circuit;

[0013] A voltage stabilizing circuit, connected between the inverter circuit and the output circuit, for stabilizing the voltage output by the inverter circuit;

[0014] The switch charging circuit is also connected to the inverter circuit so as to turn off the output of the inverter circuit during charging.

[0015] In the present application, the input end is used to input the neutral and live wires, which are then filtered and then supplied to the lamp through the output circuit. At the same time, the filter circuit also charges the battery with part of the voltage through the switch charging circuit. Since the switch charging circuit is also connected to the inverter circuit, the charging can only be started when the switch charging circuit is working, and the output of the inverter circuit is cut off, so that the battery is fully charged. When the power fails, the switch charging circuit stops outputting, and the battery is inverted and boosted through the inverter circuit. The voltage stabilizing circuit provides constant current and voltage, and can provide a stable output current and voltage to the output module. Then the LED lamp can continue to work, which can ensure safe evacuation and dispersal time, and at the same time ensure that security personnel have time to conduct safety checks. Since there is no feedback circuit in the battery power supply circuit, the battery can output high power, ensuring continuous high-voltage output lighting of the lamp.

[0016] In some embodiments, the switch charging circuit includes a switch chip U1, a pin of which is connected to the output end of the filter circuit, and also includes a transistor Q5, the emitter and base of which are connected to the output end of the filter circuit, and the collector is grounded.

[0017] In some embodiments, the switch charging circuit also includes a MOS tube Q1 and a transformer T1, the gate of the MOS tube Q1 is connected to a pin of the switch chip U1, the source is grounded, and the drain is connected to the primary winding of the transformer T1. The primary winding of the transformer T1 is also connected to the output end of the filter circuit, and the secondary winding of the transformer T1 is connected to the battery BT1 and the inverter circuit.

[0018] In some embodiments, the voltage stabilizing circuit includes a voltage stabilizing chip U5, pin 4 of the voltage stabilizing chip U5 is connected to the output end of the inverter circuit, pin 2 of the voltage stabilizing chip U5 is connected to the gate of the MOS tube Q4, the source of the MOS tube Q4 is grounded, and the drain is connected to the secondary winding of the auxiliary winding T1, and the primary winding of the auxiliary winding T1 is connected to the output end of the inverter circuit.

[0019] In some embodiments, a resistor R44 and a resistor R45 are provided between the pin 4 of the voltage stabilizing chip U5 and the output end of the inverter circuit, and the resistor R44 is connected in parallel with a terminal K2.

[0020] In some embodiments, the inverter circuit includes a detection chip U2 and an output chip U4, pin 4 of the detection chip U2 is connected to the output end of the switch charging circuit, pin 5 of the detection chip U2 is connected to pin 10 of the output chip U4, pin 11 and pin 14 of the output chip U2 are respectively connected to the gates of MOS tube Q2 and MOS tube Q3, the source electrodes of the MOS tube Q2 and the MOS tube Q3 are grounded, and the drain electrodes of the MOS tube Q2 and the MOS tube Q3 are connected to the primary winding of the transformer T2.

[0021] In some embodiments, the pin 3 of the detection chip U2 is connected to the battery BT1, and the pin 6 of the detection chip U2 is connected to the LED light group. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0023] Figure 1 It is a schematic structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Please refer to Figure 1 As shown, a high-voltage LED light strip emergency power supply includes:

[0026] Input terminal 1 is used to input the neutral and live wires;

[0027] A filter circuit 2 connected to the input end;

[0028] An output circuit 3, connected to the output end of the filter circuit 2, for outputting a voltage to illuminate the lamp;

[0029] A switch charging circuit 4, one end of which is connected to the output end of the filter circuit 2, and the other end of which is connected to the battery BT1, for opening or closing the connection between the filter circuit 2 and the battery BT1;

[0030] The inverter circuit 5 is connected to the output end of the battery BT1 and is also connected to the output circuit 3, and boosts the voltage of the battery BT1 to supply power to the lamp through the output circuit 3;

[0031] A voltage stabilizing circuit 6, connected between the inverter circuit 5 and the output circuit 3, for stabilizing the voltage output by the inverter circuit 5;

[0032] The switch charging circuit 4 is also connected to the inverter circuit 5 so as to turn off the output of the inverter circuit 5 during charging.

[0033] In this embodiment, the filter circuit outputs a signal BS+ to the output circuit, and outputs L+ and L- to power the lamp. An isolated high PFC calibration power supply is used, and the input PFC is greater than 0.95. The inverter circuit uses an open-loop plus a customized constant current and constant voltage power drive circuit, which can provide a stable output current and voltage, so that the battery inverter discharge time can be accurately guaranteed. The inverter output is efficient and flicker-free, ensuring the high light quality of the LED light strip. The drive power supply adopts an isolated high power factor two-stage circuit architecture. The front-stage circuit adopts a stable PFC calibration circuit, and the harmonics meet the IEC61000-3-2 / GB17625.1-2003 standard requirements. The rear-stage circuit uses a driver IC customized by the company, which can realize multiple protection functions such as constant voltage, constant current, constant power, overvoltage, undervoltage, and short circuit. The input and output use quick connectors, which can be installed and used simply and quickly.

[0034] Normal power supply and emergency power supply are integrated into one product, and the volume is only 30% of ordinary products, but the normal power supply power reaches 400W, and the emergency power supply reaches 60W, which can provide emergency power supply for 2 hours. The waterproof high-voltage LED light strip emergency drive power supply adopts an integrated waterproof aluminum profile structure, and the input and output use CCC / TUV certified wires and quick waterproof connectors. When there is AC input, the rectifier and filter circuit outputs 220Vdc to directly provide 400W output power to the LED light strip, and charge the built-in battery pack at the same time. When the input AC power is cut off, the internal inverter works in an efficient open loop to boost the 22.4Vdc battery to 300Vdc, and provides 166V / 191V 300mA 50W low-power output through the patented constant voltage and constant current circuit, maintaining 2 hours of emergency power supply. Input: 220-240Vac 50 / 60Hz PF>0.9; Output: 166Vdc 300mA / 191Vac300mA 60W Max.

[0035] In this embodiment, the switch charging circuit 4 includes a switch chip U1, one pin of the switch chip U1 is connected to the output end of the filter circuit 2, and also includes a transistor Q5, the emitter and base of the transistor Q5 are connected to the output end of the filter circuit 2, and the collector is grounded. Specifically, the filter circuit outputs a signal BV+ after filtering, and BV+ passes through resistors R4 and R5 and then powers the chip through pin 3 of the switch chip U1. At this time, the battery charging mode is turned on. Since BV+ also flows through the base of the transistor Q5, when the battery is fully charged, the power of BV+ decreases. At this time, the transistor Q5 is turned on, and BV+ passes through resistors R4, R5, RC1 and transistor Q5 to the ground, so that the switch chip U1 has no voltage input and charging is cut off.

[0036] In this embodiment, the switch charging circuit 4 also includes a MOS tube Q1 and a transformer T1. The gate of the MOS tube Q1 is connected to a pin of the switch chip U1, the source is grounded, and the drain is connected to the primary winding of the transformer T1. The primary winding of the transformer T1 is also connected to the output end of the filter circuit 2. The secondary winding of the transformer T1 is connected to the battery BT1 and the inverter circuit 5. When the switch chip U1 is powered, the signal BV+ is fed back to the pin 2 of the switch chip U1 through the resistor R6, the resistor R9 and the resistor R10, and then output to the MOS tube Q1 through the resistor R18 with the pin 5. The drain and source of the MOS tube Q1 are connected to the ground, and BV+ is grounded through the primary winding of the transformer T1. At this time, the secondary winding of the transformer T1 outputs the signal VP and the signal BAT+, and the signal BAT+ charges the battery BT1.

[0037] In this embodiment, the voltage stabilizing circuit 6 includes a voltage stabilizing chip U5, a pin 4 of the voltage stabilizing chip U5 is connected to the output end of the inverter circuit 5, a pin 2 of the voltage stabilizing chip U5 is connected to the gate of the MOS tube Q4, a source of the MOS tube Q4 is grounded, and a drain is connected to the secondary winding of the auxiliary winding T1, a primary winding of the auxiliary winding T1 is connected to the output end of the inverter circuit 5, an output of the transformer T2 supplies power to the voltage stabilizing chip U5 through resistors R40, R41, and R42, and is rectified and output VC through a diode D19 and a resistor R53, VC is fed back to the pin 4 of the voltage stabilizing chip U5 through resistors R44 and R45, and a pin 2 of the voltage stabilizing chip U5 is output to the MOS tube Q4 through a resistor R48, and the auxiliary winding T1 can provide high-precision constant voltage and constant current output performance by changing its duty cycle, adopts a frequency modulation control method, and inherits the constant current compensation of the line voltage and the load voltage, and utilizes the integrated line loss compensation function to obtain high-performance constant voltage output.

[0038] In this embodiment, resistors R44 and R45 are provided between pin 4 of the voltage stabilizing chip U5 and the output end of the inverter circuit 5. The resistor R44 is connected in parallel with a terminal K2. Terminal K2 can be connected to a switch or a gear dial switch, and the resistance value of the resistor R44 can be changed to change the output power.

[0039] In this embodiment, the inverter circuit 5 includes a detection chip U2 and an output chip U4, wherein the pin 4 of the detection chip U2 is connected to the output end of the switch charging circuit 4, the pin 5 of the detection chip U2 is connected to the pin 10 of the output chip U4, the pins 11 and 14 of the output chip U2 are respectively connected to the gates of the MOS tube Q2 and the MOS tube Q3, the sources of the MOS tube Q2 and the MOS tube Q3 are grounded, the drains of the MOS tube Q2 and the MOS tube Q3 are connected to the primary winding of the transformer T2, and VP is connected to the pin 4 of the detection chip U2 through the resistor R24 ​​and the resistor R23 to detect whether charging is in progress. When charging is detected, the pin 5 is output to the pin 10 of the output chip U4, and then the pins 11 and 14 stop outputting to the MOS tube Q2 and the MOS tube Q3, so that the transformer T2 cannot be turned on and the inverter circuit does not work, thereby ensuring that the battery is fully charged. On the contrary, when the battery is fully charged, the switch can be turned on to start the battery inverter output.

[0040] In this embodiment, the pin 3 of the detection chip U2 is connected to the battery BT1, and the pin 6 of the detection chip U2 is connected to the LED light group. The LED light group consists of two LED lights of different colors. When charging, VP generates a signal VD through the diode D11, and the signal VD passes through the resistor R26 through one of the LEDs to the pin 6 of the detection chip U2 and then lights up, while VDD passes through the resistor R60 to the pin 3 of the detection chip U2, and is output to the other LED light at pin 6 and grounded through the resistor R27. When the mains is input, the LED indicator light is green. If the built-in battery is charged at the same time, the green light flashes, and the green light stops flashing when the battery is full. When the internal battery is used for emergency power supply, the LED indicator light is red. When the battery is almost discharged, the red light flashes, and the LED light goes out when the battery is discharged.

[0041] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application. Other principles and basic structures that are the same or similar to those of the present application are within the protection scope of the present application.

Claims

1. A high voltage LED light strip emergency power supply, characterized in that: include; Input terminal (1), used for inputting neutral and live wires; A filter circuit (2), connected to the input end; An output circuit (3) connected to the output end of the filter circuit (2) and used for outputting a voltage to illuminate the lamp; a switch charging circuit (4), one end of which is connected to the output end of the filter circuit (2) and the other end of which is connected to the battery BT1, and is used to open or close the connection between the filter circuit (2) and the battery BT1; An inverter circuit (5) is connected to the output end of the battery BT1 and is also connected to the output circuit (3) to boost the voltage of the battery BT1 and supply power to the lamp through the output circuit (3); A voltage stabilizing circuit (6), connected between the inverter circuit (5) and the output circuit (3), and used for stabilizing the voltage output by the inverter circuit (5); The switch charging circuit (4) is also connected to the inverter circuit (5) so that the output of the inverter circuit (5) is turned off during charging; The switch charging circuit (4) comprises a switch chip U1, one pin of which is connected to the output end of the filter circuit (2), and a transistor Q5, the emitter and base of which are connected to the output end of the filter circuit (2), and the collector is grounded; The switch charging circuit (4) further comprises a MOS tube Q1 and a transformer T1, wherein the gate of the MOS tube Q1 is connected to a pin of the switch chip U1, the source is grounded, and the drain is connected to the primary winding of the transformer T1, the primary winding of the transformer T1 is also connected to the output end of the filter circuit (2), and the secondary winding of the transformer T1 is connected to the battery BT1 and the inverter circuit (5); The voltage stabilizing circuit (6) comprises a voltage stabilizing chip U5, wherein a pin 4 of the voltage stabilizing chip U5 is connected to the output end of the inverter circuit (5), a pin 2 of the voltage stabilizing chip U5 is connected to the gate of the MOS tube Q4, a source of the MOS tube Q4 is grounded, a drain is connected to the secondary winding of the auxiliary winding T1, and a primary winding of the auxiliary winding T1 is connected to the output end of the inverter circuit (5); A resistor R44 and a resistor R45 are provided between the pin 4 of the voltage stabilizing chip U5 and the output end of the inverter circuit (5), and the resistor R44 is connected in parallel with a terminal K2; The inverter circuit (5) comprises a detection chip U2 and an output chip U4, wherein the pin 4 of the detection chip U2 is connected to the output end of the switch charging circuit (4), the pin 5 of the detection chip U2 is connected to the pin 10 of the output chip U4, the pin 11 and the pin 14 of the output chip U2 are respectively connected to the gates of the MOS transistor Q2 and the MOS transistor Q3, the source electrodes of the MOS transistor Q2 and the MOS transistor Q3 are grounded, and the drain electrodes of the MOS transistor Q2 and the MOS transistor Q3 are connected to the primary winding of the transformer T2; Pin 3 of the detection chip U2 is connected to the battery BT1, and pin 6 of the detection chip U2 is connected to the LED lamp group.

Images