WO2019153645A1

WO2019153645A1 - Power supply system for portable lighting device and portable lighting device

Info

Publication number: WO2019153645A1
Application number: PCT/CN2018/095390
Authority: WO
Inventors: 黄付生
Original assignee: 深圳市爱克斯达电子有限公司
Priority date: 2018-02-11
Filing date: 2018-07-12
Publication date: 2019-08-15
Also published as: CN207926997U

Abstract

Disclosed by the present application is a power supply system for a portable lighting device, comprising: a master control unit, a first power supply and a second power supply, and the first power supply and the second power supply are both connected to the master control unit; when the first power supply cannot supply power to a load of the portable lighting device, the master control unit starts the second power supply to continuously supply power to the load by means of the second power supply. According to the present application, at least two power supplies are used for power supplying; the first power supply (i.e., a main power supply) is configured to provide a main function, and the second power supply (i.e., an auxiliary power supply) functions when the first power supply has a fault or is removed for a replacement, such that the load of the lighting device can continuously work for a certain time period.

Description

Power supply system and portable lighting device for portable lighting devices

Technical field

The present application relates to the field of lighting devices, and in particular to a power supply system and a portable lighting device for a portable lighting device.

Background technique

At present, portable lighting devices on the market, such as various types of flashlights, headlights, etc., are mostly powered by a single power source. However, in a dark or weak light environment, once the single power supply is powered down or fails, causing the portable lighting device to lose its function, the user needs to replace the battery in the dark or charge the charger to continue using it, otherwise it will cause The safety hazard, or in an emergency, the power supply is disconnected from the power supply interface due to vibration, etc., which causes the load to be inoperable, which also causes inconvenience in use.

Summary of the invention

In view of the above drawbacks, the present application provides a portable lighting device for a portable lighting device and a portable lighting device having the power supply system, the power supply system is powered by at least two power sources, and the first power source (ie, the main power source) is used to provide main functions. The second power source (ie, the auxiliary power source) functions when the first power source fails or is replaced and replaced, so that the load of the portable lighting device can continue to work for a certain period of time.

The technical solution proposed by the present application on the above technical problems is as follows:

In one aspect, a power supply system for a portable lighting device is provided, comprising: a main control unit, a first power source, and a second power source, wherein the first power source and the second power source are both connected to the main control unit; When the first power source is unable to supply power to the load of the portable lighting device, the main control unit enables the second power source, and continues to supply power to the load through the second power source.

Preferably, a first power sensing unit is configured between the main control unit and the first power source for detecting a magnitude of a voltage of the first power source and/or whether the first power source is powered off;

The first power source automatically charges the second power source when detecting that the first power source is fully charged or the voltage is greater than the second power source voltage;

And/or, when detecting that the first power voltage is lower than a preset value, the main control unit reduces or turns off a voltage output of the first power source to the load;

And/or, when detecting the first power supply no voltage output, it generates a power down signal and sends it to the main control unit, the main control unit enables the second according to the power down signal A power source continues to supply power to the load through the second power source.

Preferably, a first power discharge anti-backflow unit is disposed between the first power source and the load.

Preferably, a second power charging anti-backflow unit is disposed between the first power source and the second power source.

Preferably, a second power discharge anti-backflow unit is disposed between the second power source and the load.

Preferably, the power supply system further includes a first power removal sensing unit configured to detect whether the first power source is disconnected from a power supply interface of the load driving circuit, and if it is detected that the power has been disengaged, the first The power removal sensing unit sends a signal to the main control unit, the main control unit enables the second power supply, and continues to supply power to the load through the second power source.

Preferably, the power supply system further includes:

a voltage stabilizing unit connected to the main control unit for providing a stable voltage to the main control unit;

And/or an indicating unit connected to the main control unit for reminding the user that the second power source has been enabled when power is continuously supplied to the load by the second power source.

In another aspect, a portable lighting device is also provided, comprising a load and a power supply system as described above for powering the load.

Preferably, the load comprises a lighting assembly.

The power supply system of the present application can switch to the second power source U2 (such as the auxiliary power source) when the first power source U1 (such as the main power source) is suddenly powered off or the main device is powered down, and continue to be given to the second power source U2. The load is powered so that the load of the portable lighting device can continue to operate for a certain period of time; for example, the lighting component of the portable lighting device is continuously powered by the second power source U2 to illuminate the peripheral area or the internal area of the portable lighting device It is convenient for the user to replace the first power source U1 in a dark or weak environment, avoiding the use of a single power supply in the prior art, and once the power is suddenly turned off during the use or the main device is powered off, it may result in a portable The lighting device loses its function, and the user cannot replace the defect of the first power source U1 in a dark or weak environment, thereby avoiding danger and improving the convenience of use.

DRAWINGS

The one or more embodiments are exemplified by the accompanying drawings in the accompanying drawings, and FIG. The figures in the drawings do not constitute a scale limitation unless otherwise stated.

1 is a schematic structural diagram of a power supply system according to Embodiment 1 of the present application;

2 is a circuit diagram of a main control unit in Embodiment 1 of the present application;

3 is a circuit diagram of a power supply system according to Embodiment 1 of the present application;

4 is a circuit diagram of a first power removal induction unit in the first embodiment of the present application;

5 is a structural diagram of a sensing unit according to Embodiment 1 of the present application;

6 is a circuit diagram of a voltage stabilizing unit in Embodiment 1 of the present application;

FIG. 7 is a circuit diagram of an indication unit in Embodiment 1 of the present application.

Detailed ways

In order to make the objects, technical solutions, and advantages of the present application more comprehensible, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.

Embodiment 1:

As shown in FIG. 1, the power supply system for the portable lighting device in this embodiment includes: a main control unit U3, a first power source U1, and a second power source U2, and the first power source U1 and the second power source U2 are connected to each other. The main control unit U3; when the first power source U1 is unable to supply power to the load of the portable lighting device, the main control unit U3 enables the second power source U2, and continues to the said second power source U2 Load power supply.

In this embodiment, the portable lighting device may preferably be a flashlight or a headlight, etc., and the load includes a lighting component of the portable lighting device, such as an LED lamp, etc., thereby, when the portable lighting device is in use during use When the power source U1 (such as the main power source) is suddenly powered off or the main device is powered off, it can switch to the second power source U2 (such as the auxiliary power source), and continue to supply power to the load through the second power source U2, so that the load can be Continuously working for a predetermined time, such as continuing to supply power to the lighting component of the portable lighting device through the second power source U2, illuminating the peripheral area of the portable lighting device, so that the user can also be in a dark or weak environment. The replacement of the first power source U1 avoids the use of a single power supply in the prior art. Once the power is suddenly turned off during the use or the main device is powered off, the portable lighting device may be lost, and the user may not be in the dark or the light is weak. The defect of replacing the first power source U1 in the environment, thereby avoiding danger and improving the convenience of use.

Therefore, the above-mentioned arrangement of the first power source U1, the second power source U2 and the main control unit U3 in the portable lighting device is an improvement made specifically for the portable lighting device, and belongs to an important invention of the present application, in the prior art. There is no similar solution.

Preferably, the first power supply sensing unit is configured between the main control unit U3 and the first power source U1 for detecting the magnitude of the voltage of the first power source U1 and/or whether the first power source U1 is powered off. U4;

When it is detected that the first power source U1 is fully charged or the voltage is greater than the voltage of the second power source U2, the first power source U1 automatically charges the second power source U2;

And/or, when detecting that the voltage of the first power source U1 is lower than a preset value, the main control unit U3 reduces or turns off the voltage output of the first power source U1 to the load;

And/or, when it is detected that the first power source U1 has no voltage output, it generates a power-off signal and sends it to the main control unit U3, and the main control unit U3 activates the device according to the power-off signal. The second power source U2 continues to supply power to the load through the second power source U2.

In this embodiment, as shown in FIG. 2, the main control unit U3 has twelve interfaces, including a first interface IO1 to a ninth interface IO9, a tenth interface, an eleventh interface, and a twelfth interface, where The eleven interface is connected to the working voltage VDD+, and the twelfth interface is grounded.

As shown in FIG. 3, the first power sensing unit U4 includes: a first resistor R1, and one end of the first resistor R1 is connected to the fifth interface IO5 of the main control unit U3, and the other end is connected to the first The anode of the power source U1, preferably, the first power sensing unit U4 may further include an auxiliary resistor R1', one end of which is connected to the first resistor R1 and the other end of which is grounded.

In addition, a first power-discharge anti-backflow unit U5 is disposed between the first power source U1 and the load. Specifically, the first power-discharge anti-backflow unit U5 includes:

a first field effect transistor Q1 having a source connected to the anode of the first power source U1;

a first NPN transistor Q3 having a collector connected to the gate of the first field effect transistor Q1, a base connected to the first interface IO1 of the main control unit U3, and an emitter grounded;

a second resistor R2, one end of which is connected to the source of the first field effect transistor Q1, and the other end of which is connected to the gate of the first field effect transistor Q1;

a second field effect transistor Q2 having a drain connected to a drain of the first field effect transistor Q1 and a source connected to the load;

a second NPN transistor Q4 having a collector connected to the gate of the second field effect transistor Q2, a base connected to the second interface IO2 of the main control unit U3, and an emitter grounded;

And a third resistor R3, one end of which is connected to the source of the second field effect transistor Q2, and the other end of which is connected to the gate of the second field effect transistor Q2.

A second power charging anti-backflow unit U6 is disposed between the first power source U1 and the second power source U2,

The second power supply anti-backflow unit U6 includes a diode D1 and a fourth resistor R4. The diode D1 is connected to the anode of the first power source U1, and the third resistor R3 is connected to the diode D1. The other end is connected to the anode of the second power source U2.

A second power-discharge anti-backflow unit U7 is disposed between the second power source U2 and the load. Specifically, the second power-discharge anti-backflow unit U7 includes: a third FET Q5, and a source connection The positive pole of the second power source U2;

a third NPN transistor Q7 having a collector connected to the gate of the third field effect transistor Q5, a base connected to the third interface IO3 of the main control unit U3, and an emitter grounded;

a fifth resistor R5, one end of which is connected to the source of the third field effect transistor Q5, and the other end of which is connected to the gate of the third field effect transistor Q5;

a fourth field effect transistor Q6 having a drain connected to a drain of the third field effect transistor Q5 and a source connected to the load;

a fourth NPN transistor Q8 having a collector connected to the gate of the fourth field effect transistor Q6, a base connected to the fourth interface IO4 of the main control unit U3, and an emitter grounded;

And a sixth resistor R6 having one end connected to the source of the fourth field effect transistor Q6 and the other end connected to the gate of the fourth field effect transistor Q6.

The load includes: a first light emitting diode LED1, a fifth field effect transistor Q9, an operational amplifier IC8, a seventh resistor R7 to a thirteenth resistor R13, a first capacitor C1, and a second capacitor C2; specifically, the first The positive electrode of the LED1 is connected to the source of the second field effect transistor Q2 and the source of the fourth field effect transistor Q6, and the negative electrode is connected to the drain of the fifth field effect transistor Q9; the fifth field effect transistor Q9 The source is connected in series with the seventh resistor R7 and is grounded, the gate is connected in series with the eighth resistor R8, and then connected to the output terminal of the operational amplifier IC8; the ninth resistor R9 is connected at one end to the gate of the fifth field effect transistor Q9. The other end is connected to the source of the fifth field effect transistor Q9; one end of the tenth resistor R10 is connected to the source of the fifth field effect transistor Q9, and the other end is connected to the inverting input terminal of the operational amplifier IC8; The input terminal of the operational amplifier IC8 is connected in series with the eleventh resistor R11 and the twelfth resistor R12, and then connected to the eighth interface 108 of the main control unit U3; the first capacitor C1 is connected at one end to the tenth One resistor R11, the twelfth resistor R12, the other end One end of the second capacitor C2 is connected between the eleventh resistor R11 and the forward input terminal of the operational amplifier IC8, and the other end is grounded; the thirteenth resistor R13 is connected in parallel to the second capacitor C2. Both ends; the positive power terminal of the operational amplifier IC8 is connected to the ninth interface IO9 of the main control unit U3, and the negative power terminal is grounded.

In addition, the first power sensing unit U4 can only detect whether the first power source U1 has a voltage output or a sudden voltage change to determine whether it is disconnected from the power supply interface of the load, for example, when detecting the voltage across the first power source U1. At 0V, it is considered that the first power source U1 is disconnected from the power supply interface of the load, but in fact, if the first power source U1 with the protection board is over-discharged, the protection board automatically cuts off the current loop, resulting in the first power source U1 with the protection board. The voltage of the voltage is 0V. It is further considered that the first power source U1 has been disconnected from the power supply interface of the load driving circuit, but at this time, the battery core of the first power source U1 is actually powered, and is not separated from the power supply interface driving circuit of the load. This can lead to misjudgment.

Therefore, in order to improve the accuracy of the detection and reduce the false positives, as shown in FIG. 4, the power supply system in this embodiment further includes a first power removal induction unit U8 for detecting whether the first power source U1 is The power supply interface of the load driving circuit is disengaged. If the detection has been disengaged, the first power removal sensing unit U8 sends a signal to the main control unit U3, and the main control unit U3 turns off the first power supply discharge anti-backflow The unit U5 opens the second power-discharge anti-backflow unit U7, activates the second power source U2, and continues to supply power to the load through the second power source U2.

Specifically, the first power removal sensing unit U8 includes: an sensing component S1 connected to the main control unit U3, configured to detect whether the first power source U1 is disconnected from a power supply interface of the driving circuit of the load; The fourteenth resistor R14 has one end connected to the sensing component S1 and the sixth interface IO6 of the main control unit U3, and the other end connected to the working voltage VDD+.

The sensing unit S1 can have various forms. As shown in FIG. 5, the sensing component S1 can be a structure that can be elastically deformed, such as a spring piece or a spring structure. In the flashlight, the first power source U1 (such as a battery) Closed in the barrel 10 by the tail cap and in contact with the power supply interface of the load driving circuit on the circuit board 20, when the first power source U1 is in contact with the power supply interface on the circuit board, the first power source U1 Squeezing the sensing component S1 such that the sensing component S1 is deformed, thereby contacting the detecting point. At this time, it is considered that the first power source U1 is in normal contact with the power supply interface on the circuit board 20; When the first power source U1 is disconnected from the power supply interface on the circuit board 20, such as unscrewing the tail cover or vibrating or manually removing the first power source U1, the first power source U1 is released from the sensing component S1. The sensing component S1 is restored to the original state and separated from the detecting point. At this time, it is considered that the first power source U1 is disconnected from the power supply interface of the driving circuit of the load on the circuit board, and further generates a power supply signal, and is sent to the main control. unit U3, the main control unit U3 enables the second power source U2 to continue supplying power. Of course, the sensing component S1 of the above-mentioned shrapnel structure is only one of the embodiments, and other structural forms in the art, such as a photoelectric sensor, an infrared sensor, a proximity switch, etc., can realize the above detection functions, which are all protected by the present application. range.

On this basis, in order to ensure the stable operation of the power supply system and to improve the ease of use,

The power supply system further includes: a voltage stabilizing unit U9 connected to the main control unit U3 for providing a stable voltage to the main control unit U3;

And/or an indicating unit U10 connected to the main control unit U3 for reminding the user that the second power source U2 has been enabled when the power supply to the load is continued through the second power source U2.

Specifically, as shown in FIG. 5, the voltage stabilizing unit U9 includes: a chip IC1, a third capacitor C3, and a fourth capacitor C4; the chip IC1 has an input end, an output end, and a ground end; the third capacitor C3 One end is connected to the voltage output end of the second power source U2 and the input end of the chip IC1, and the other end is grounded; one end of the fourth capacitor C4 is respectively connected to the output end of the power source VDD+ and the chip IC1, and the other end is grounded; Grounding end of the chip IC1 is grounded;

As shown in FIG. 6, the indicating unit U10 includes: a second LED diode 2 and a fifteenth resistor R15; wherein a positive pole of the second LED diode 2 is connected to the power source VDD+, and a cathode is connected in series with the fifteenth resistor After R15, the seventh interface 107 of the main control unit U3 is connected.

Embodiment 2:

The present embodiment provides a portable lighting device (including a flashlight, a headlight, etc.) including a load and a power supply system for powering the load in the first embodiment; in this embodiment, the load includes a lighting component, Such as LED lights.

Thus, when the portable power device suddenly powers down during the use of the first power source U1 (such as the main power source) or the main device loses power, it can switch to the second power source U2 (such as the auxiliary power source) through the The second power source U2 continues to supply power to the lighting component of the portable lighting device to illuminate the peripheral area or the inner area of the portable lighting device, so that the user can replace the first power source U1 in a dark or weak environment. This forms a portable lighting device that is always powered, avoiding the use of a single power supply in the prior art. Once the power is suddenly turned off during the use or the main device is powered down, the portable lighting device may lose its function, and the user cannot be in the dark or The defect of replacing the first power source U1 in a weak light environment, thereby avoiding danger and improving the convenience of use.

In summary, the power supply system in the present application can switch to the second power source U2 (such as the auxiliary power source) when the first power source U1 (such as the main power source) is suddenly powered off or the main device is powered down. The second power source U2 continues to supply power to the load such that the load of the portable lighting device can continue to operate for a certain period of time; for example, by continuing to power the lighting assembly of the portable lighting device through the second power source U2, illuminating the portable lighting The peripheral area or the inner area of the device allows the user to replace the first power source U1 in a dark or weak environment, avoiding the use of a single power supply in the prior art, and suddenly powering down or the main device is lost during use. Electricity can cause the portable lighting device to lose its function, and the user cannot replace the defect of the first power source U1 in a dark or weak environment, thereby avoiding danger and improving the convenience of use.

It should be noted that the specific circuit structures of U1 to U10 in the first embodiment and the second embodiment are only shown as a specific implementation form. In fact, the structural forms that can realize the functions of the above U1 to U10 belong to the present application. protected range.

The technical features in the first and second embodiments of the present application can be arbitrarily combined, and the combined technical solutions are all within the protection scope of the present application.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; in the idea of the present application, the technical features in the above embodiments or different embodiments may also be combined. The steps may be carried out in any order, and there are many other variations of the various aspects of the present application as described above, which are not provided in the details for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, The skilled person should understand that the technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the embodiments of the present application. The scope of the technical solution.

Claims

A power supply system for a portable lighting device, comprising: a main control unit, a first power source, and a second power source, wherein the first power source and the second power source are both connected to the main control unit; When the first power source is unable to power the load of the portable lighting device, the primary control unit enables the second power source, and continues to power the load through the second power source.
The power supply system according to claim 1, wherein a magnitude of a voltage for detecting the first power source and/or a power failure of the first power source is provided between the main control unit and the first power source First power sensing unit;

The first power source automatically charges the second power source when detecting that the first power source is fully charged or the voltage is greater than the second power source voltage;

And/or, when detecting that the first power voltage is lower than a preset value, the main control unit reduces or turns off a voltage output of the first power source to the load;

And/or, when detecting the first power supply no voltage output, it generates a power down signal and sends it to the main control unit, the main control unit enables the second according to the power down signal A power source continues to supply power to the load through the second power source.
The power supply system according to claim 1, wherein a first power discharge anti-backflow unit is disposed between the first power source and the load.
The power supply system according to claim 1, wherein a second power charging anti-backflow unit is disposed between the first power source and the second power source.
The power supply system according to claim 1, wherein a second power-discharge anti-backflow unit is disposed between the second power source and the load.
The power supply system according to claim 1, wherein said power supply system further comprises a first power removal sensing unit for detecting whether said first power source is disconnected from a power supply interface of said load driving circuit. If it is detected that the detachment has occurred, the first power removal sensing unit sends a signal to the main control unit, the main control unit enables the second power source, and continues to supply power to the load through the second power source.
The power supply system of claim 1 further comprising:

a voltage stabilizing unit connected to the main control unit for providing a stable voltage to the main control unit;

And/or an indicating unit connected to the main control unit for reminding the user that the second power source has been enabled when power is continuously supplied to the load by the second power source.
A portable lighting device characterized by comprising a load and a power supply system for powering the load as claimed in any one of claims 1-7.
The portable lighting device of claim 8 wherein said load comprises a lighting assembly.