CN204929359U

CN204929359U - Lighting device based on lithium cell

Info

Publication number: CN204929359U
Application number: CN201520715424.6U
Authority: CN
Inventors: 李沁育; 葛轩铭
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-09-16
Filing date: 2015-09-16
Publication date: 2015-12-30
Anticipated expiration: 2025-09-16

Abstract

The utility model discloses a lighting device based on lithium cell, it includes the lithium cell, the lithium cell charge the input through connecting external power source based on the charging circuit of TP4056 chip, the power output end of lithium cell is connected with the LED banks that is used for throwing light on behind change over switch, change over switch still connects the LED banks through timing circuit, the power output end of lithium cell is also connected to timing circuit's power input end. The utility model discloses a lithium cell is small, light in weight, long service life, has multiple functions, designs more humanizedly. The utility model is suitable for a throw light on in various work, living environment.

Description

Based on the lighting device of lithium battery

Technical field

The utility model belongs to lighting field, relates to a kind of lighting device, specifically a kind of lighting device based on lithium battery.

Background technology

Energy-saving desk lamp, owing to having the advantages such as low-power consumption, accumulation, volume be little and being widely used, is particularly useful for the study of student.Existing energy-saving desk lamp kind is a lot, and in use also can there is many problems, wherein topmost problem is power issue.Because existing desk lamp major part adopts storage battery power supply, although storage battery has easy to use, that low price, power output are large advantage, also there is the defects such as volume is large, useful life is short, the charging interval is long, charge efficiency is low in it; And the charge-discharge circuit of part desk lamp designs very simple, thus cause the poor stability of storage battery both end voltage, therefore desk lamp can not use in charging process, otherwise can damage bulb.

In addition, existing desk lamp also has following shortcoming:

Common desk lamp does not have timing function, storage of electrical energy in power supply is finished desk lamp just extinguishes, cause user in use not remind and use kopiopia for a long time, affecting the eyesight of user once only have after opening switch;

Existing desk lamp can only be charged by the charger of coupling, and charging modes is single, does not have electricity running into desk lamp, and when not having an AC power, other modes (such as charger baby) cannot be utilized to charge to desk lamp;

The design height of existing desk lamp generally can only be used by a user, when there being two people or more people to use simultaneously, just there will be the situation of luminance shortage, thus can bring harmful effect to the eyesight of user.

Utility model content

For solving the above deficiency existed in prior art, the utility model provides a kind of lighting device based on lithium battery, adopt lithium battery as power supply, the requirement that charging circuit design also can use when meeting charging, there is timing reminding function, charger baby charge function simultaneously, and brightness control function.

For achieving the above object, the technical scheme that adopts of the utility model is as follows:

Based on a lighting device for lithium battery, it comprises:

Lithium battery, the charging input end of described lithium battery connects external power source by the charging circuit based on TP4056 chip, power output end connects the LED group for throwing light on, the power output end of lithium battery is connected with the LED group for throwing light on after change over switch, described change over switch also connects LED group by timing circuit, and the power input of described timing circuit also connects the power output end of lithium battery.

As to restriction of the present utility model: it also comprises charging circuit indicator light, the power input of described charging circuit indicator light connects the power output end of charging circuit.

Limit as to another kind of the present utility model: it also comprises the photosensitive circuit of prompting light luminance, the power input of described photosensitive circuit connects the power output end of lithium battery.

Limit as to of the present utility model the third: it also comprises color lamp indicating circuit, the power input of described color lamp indicating circuit connects the power output end of lithium battery by change over switch.

Owing to have employed technique scheme, compared with prior art, acquired technological progress is the utility model:

(1) the utility model adopts lithium battery as power supply, and power volume is little, lightweight, and is provided with special lithium battery charging circuit, effectively improves stability and the useful life of power supply;

(2) the utility model is provided with timing circuit, and the time can opened desk lamp carries out timing, makes it at scheduled time automatic distinguishing, prevents user from using for a long time and causing damage to the eyesight of oneself;

(3) the utility model is provided with photosensitive circuit, and when extraneous light brightness reduces, (such as during night), meeting be pointed out user, reminded its blast desk lamp;

(4) charging circuit of the present utility model adopts 5V to power, and be applicable to computer USB interface, charger for mobile phone interface, charger baby interface etc., charging modes is varied.

In sum, lithium battery volume of the present utility model is little, lightweight, long service life, has several functions, designs humanized.

The utility model is applicable to throw light in various work, living environment.

Accompanying drawing explanation

Below in conjunction with drawings and the specific embodiments, the utility model is further described in detail.

Fig. 1 is the theory diagram of the utility model embodiment;

Fig. 2 is the circuit theory diagrams of the utility model embodiment.

Embodiment

embodiment is based on the lighting device of lithium battery

Present embodiments provide a kind of lighting device based on lithium battery, as shown in Figure 1 and Figure 2, it comprises:

(1) lithium battery

Lithium battery, as the power subsystem of the present embodiment, adopts chargeable lithium cell of the prior art, and it exports as 3.7V power supply.

(2) LED group

LED group is the illumination component of the lighting device based on lithium battery that the present embodiment provides, can be luminous after energising.It comprises first group of LED group D7, and second group of LED group D8.

(3) charging circuit

Charging circuit is used for charging for lithium battery, the charging input end of lithium battery connects the power output end of charging circuit, the power input of charging circuit connects outside 220V AC power by the power supply adaptor of outside, also can directly connect the equipment such as computer, charger baby.

Charging circuit as shown in Figure 2, is the charging circuit based on TP4056 chip U1, and the power supply that external power adapter inputs to TP4056 chip U1 is 5V power supply, and connects the charging end of lithium battery as the 5th pin of power output end.

Charging circuit is also provided with charging circuit indicator light, comprise red led D2 and green indicating lamp D1, wherein red led D2 be when charging circuit to lithium cell charging and underfill time light and indicate, green indicating lamp D1 be then when charging circuit to lithium cell charging and be full of time light and indicate.

Be connected to after red led D2 and the second resistance R2 forms series circuit between the 7th pin of TP4056 chip and 5V power supply; Green indicating lamp D1 then and the 4th resistance R4 form series circuit after be connected between the 6th pin of TP4056 chip and 5V power supply.

(4) timing circuit

Timing circuit is used for carrying out timing to LED group, arrives the duration moment LED group automatic distinguishing of setting.The power input of timing circuit connects lithium battery, and output connects the LED group for throwing light on.

Timing circuit in the present embodiment as shown in Figure 2, adopts the timing circuit of the formation based on 7555 timing chip U2.The power end of 7555 timing chips connects the 3.7V power supply of lithium battery output, and is adjusted by the duration of series circuit to timing that the 6th resistance R6 and slide rheostat RP is formed.The one end of the series circuit that 6th resistance R6 and slide rheostat RP is formed, connects the 8th pin and the 4th pin of 7555 timing chip U2 respectively; The other end of this series circuit is by the 4th capacitor C4 ground connection.Meanwhile, the 7th pin of 7555 timing chip U2 and the 6th pin, be also connected to the intermediate node place of described series circuit (i.e. the 6th resistance R6 and slide rheostat RP form series circuit) and the 4th capacitor C4.

(4) change over switch

Change over switch is for realizing the conversion of LED group between timing mode and normal illumination mode.Change over switch is connected between lithium battery and timing circuit, is also connected between lithium battery and LED group simultaneously.

The change over switch of the present embodiment have employed the K switch 1 of SPDT of the prior art, and K switch 1 has two groups of switches be associated, and namely has two monomer single-pole double-throw switch (SPDT)s, and these two switches are interlocks.First fixed contact of first group of switch of K switch 1 is connected 3.7V power supply respectively with the second fixed contact.The moving contact of first group of switch of K switch 1, by the second contact switch SB2, the series circuit of first group of LED group D7 for throwing light on, the moving contact of second group of switch of connecting valve K1.Meanwhile, the moving contact of first group of switch of K switch 1, also by the 3rd contact switch SB3, the series circuit of second group of LED group D8 for throwing light on, the moving contact of second group of switch of connecting valve K1.And the first fixed contact of second of K switch 1 group of switch, that one end be connected to ground of the 4th capacitor C4 is connected by the 11 resistance R11, also connected second pin of 7555 timing chip U2 successively by the first contact switch SB1, the first contact switch SB1 is also by connecting 3.7V power supply after the 9th resistance R9 simultaneously; Second fixed contact of second group of switch of K switch 1 connects the collector electrode of the second triode Q2.The grounded emitter of the second triode Q2, base stage connects the three-prong of 7555 timing chip U2 by the 4th diode D4.

(5) photosensitive circuit

Photosensitive circuit is used for pointing out the brightness of external environment light to subtract secretly to user, and the power input of photosensitive circuit connects the power output end of lithium battery.

The photosensitive circuit of the present embodiment comprises photo resistance R10 for responding to light and the first triode Q1, and the indicator light for warning, and described indicator light is green LED D3, and its anode connects 3.7V power supply; Negative electrode connects the collector electrode of the first triode Q1 by the 7th resistance R7, also be connected the base stage of the first triode Q1 with the series circuit of the 8th resistance R8 by the 7th resistance R7 simultaneously, the base stage of the first triode Q1 connects the emitter of self, the grounded emitter of the first triode Q1 by photo resistance R10.

(6) color lamp indicating circuit

Color lamp indicating circuit is used for providing amusement function, and the power input of described color lamp indicating circuit connects the power output end of lithium battery by change over switch.

Color lamp indicating circuit in the present embodiment adopts color light-emitting diode of the prior art.There are in the present embodiment two groups of color lamp group D5, D6, and one end of the first color lamp group D5 connects 3.7V power supply by second switch K2, one end ground connection after other end serial connection the 4th contact switch SB4; One end of second color lamp group D6 also connects 3.7V power supply by second switch K2, ground connection after other end serial connection the 5th contact switch SB5.

The specific works principle of the present embodiment is: charging circuit is lithium cell charging, the power source of charging can be the outside 220V alternating current of adapter connection, also the 5V such as computer, charger baby power supply can directly be connected, in charging process, red led D2 lights, green indicating lamp D1 does not work, and green indicating lamp D1 lights after lithium battery is full of, red led D2 extinguishes.During use, if use the normal illumination function of the present embodiment, then the moving contact of two of K switch 1 groups of switches is all connected with the second fixed contact, if and need opening timing function, the moving contact of two of K switch 1 groups of switches is then made all to be connected with the first fixed contact, so just open the timing function of 7555 timing chips, the length of timing then can realize by regulating the slide plate position of slide rheostat RP.

Because the present embodiment has photosensitive circuit, therefore when there is illumination outside, the resistance of photo resistance R10 is very little, the pressure drop at its two ends also can be very little, the base emitter voltage VBE of the first triode Q1 is very little, and the first triode Q1 is in cut-off state, and green LED D3 does not work; And when there is no light irradiation, the resistance of photo resistance R10 becomes large, the pressure drop at its two ends is very large, and close to open circuit, the first triode Q1 can be in magnifying state, and green LED D3 has electric current to be flow through and be lit, and plays the effect of instruction.

In addition, the color lamp group of the present embodiment can be opened as user Closing Switch K2, the 4th contact switch SB4, the 5th contact switch SB5, make the amusement performance of the present embodiment stronger.

Claims

1., based on a lighting device for lithium battery, comprise lithium battery, it is characterized in that:the charging input end of described lithium battery connects external power source by the charging circuit based on TP4056 chip, the power output end of lithium battery is connected with the LED group for throwing light on after change over switch, described change over switch also connects LED group by timing circuit, and the power input of described timing circuit also connects the power output end of lithium battery.

2. the lighting device based on lithium battery according to claim 1, it is characterized in that:it also comprises charging circuit indicator light, and the power input of described charging circuit indicator light connects the power output end of charging circuit.

3. the lighting device based on lithium battery according to claim 1 and 2, it is characterized in that:it also comprises the dimmed photosensitive circuit of prompting light luminance, and the power input of described photosensitive circuit connects the power output end of lithium battery.

4. the lighting device based on lithium battery according to claim 1 and 2, it is characterized in that:it also comprises color lamp indicating circuit, and the power input of described color lamp indicating circuit connects the power output end of lithium battery by change over switch.

5. the lighting device based on lithium battery according to claim 3, it is characterized in that:it also comprises color lamp indicating circuit, and the power input of described color lamp indicating circuit connects the power output end of lithium battery by change over switch.