CN205753489U

CN205753489U - A kind of self-locking battery is crossed and is put overcharge protection circuit and light fixture

Info

Publication number: CN205753489U
Application number: CN201620413426.4U
Authority: CN
Inventors: 曹雄华; 陈国强; 刘琦
Original assignee: Shenzhen Jiawei Photovoltaic Lighting Co Ltd
Current assignee: Shenzhen Jiawei Photovoltaic Lighting Co Ltd
Priority date: 2016-05-09
Filing date: 2016-05-09
Publication date: 2016-11-30
Anticipated expiration: 2026-05-09

Abstract

This utility model belongs to battery protecting circuit technical field, particularly relates to a kind of self-locking battery and crosses and put overcharge protection circuit and light fixture.In this utility model embodiment; self-locking battery is crossed and is put overcharge protection circuit and include controlling the switching tube of LED load supply access and latching circuit; when described rechargeable battery BT1 crosses and is put into default under-voltage protection point; latching circuit controls described switching tube and turns off LED load supply access; when described rechargeable battery BT1 crosses the over-voltage protection point being charged to preset; described rechargeable battery BT1 is discharged by latching circuit; fill protection it is achieved thereby that the mistake of rechargeable battery BT1 is let slip, extend the life-span of battery.

Description

A kind of self-locking battery is crossed and is put overcharge protection circuit and light fixture

Technical field

This utility model belongs to battery protecting circuit technical field, particularly relates to a kind of self-locking battery and crosses and let slip Fill protection circuit and light fixture.

Background technology

Rechargeable battery due to can repeatedly discharge and recharge, provide lasting power supply for electrical appliance, extensively should In the middle of daily life.

If rechargeable battery not carried out strict super-charge super-discharge protection, can shorten even the service life of battery Can thoroughly damage.The most not only can affect the experience of user, also can increase cost.

Utility model content

The purpose of this utility model embodiment is that providing a kind of self-locking battery to cross puts overcharge protection circuit, purport Solve present battery owing to not protecting, there is the life-span short problem even damaged.

This utility model embodiment is achieved in that a kind of self-locking battery is crossed and puts overcharge protection circuit, connects LED load, described self-locking battery crosses and puts overcharge protection circuit and include charge power supply and rechargeable battery BT1, Described self-locking battery is crossed and is put overcharge protection circuit and also include:

First end and the second end connect described rechargeable battery BT1 positive pole and LED load respectively, control described LED The switching tube of load supplying path；

Control end with rechargeable battery BT1, switching tube is connected respectively, is put into when described rechargeable battery BT1 crosses Preset under-voltage protection point time, control described switching tube turn off LED load supply access, or when described in fill When electricity battery BT1 crosses the over-voltage protection point being charged to preset, the self-locking that described rechargeable battery BT1 is discharged Circuit.

In said structure, described switching tube uses metal-oxide-semiconductor Q1, and the drain electrode of described metal-oxide-semiconductor Q1 is described First end of switching tube, second end that source electrode is described switching tube of described metal-oxide-semiconductor Q1, described MOS The grid of pipe Q1 is the control end of described switching tube.

In said structure, described latching circuit includes:

Resistance R2, resistance R3, resistance R4, resistance R8, resistance R9, resistance R12, resistance R13, Audion Q2, audion Q3, audion Q4, audion Q5, diode D3, diode D5, two Pole pipe D7, comparator U1A, comparator U1B, electric capacity C1, three terminal regulator U2 and voltage comparator CD；

Described resistance R3 and voltage comparator CD is serially connected between described rechargeable battery BT1 negative pole and ground, The first described rechargeable battery BT1 positive pole of termination of described resistance R2, the second termination institute of described resistance R2 State the emitter stage of audion Q2, the grounded collector of described audion Q2, the base stage of described audion Q2 Connecing described resistance R3 and the public connecting end of voltage comparator CD, the anode of described diode D3 connects simultaneously The colelctor electrode of described audion Q2 and the grid of metal-oxide-semiconductor Q1, the negative electrode of described diode D3 connects described The colelctor electrode of audion Q3, the grounded emitter of described audion Q3, the base stage of described audion Q4 is led to Crossing described resistance R8 and connect the negative electrode of described diode D3, the emitter stage of described audion Q4 connects power supply, institute State between base stage and the emitter stage that resistance R4 is connected to described audion Q4, the current collection of described audion Q4 Electric capacity C1 ground connection is passed through in pole, and the base stage of described audion Q3 connects described audion Q4's by resistance R9 Colelctor electrode, described resistance R12 is connected between base stage and the ground of described audion Q3, described audion Q5 Emitter stage connect power supply, the colelctor electrode of described audion Q5 pass through described resistance R13 ground connection, described three poles The base stage of pipe Q5 connects outfan and the negative electrode of diode D5 of described comparator U1A, described two poles simultaneously The anode of pipe D5 connects the colelctor electrode of described audion Q4, and the in-phase input end of described comparator U1A connects point Piezoresistance, the negative-phase input of described comparator U1A connects the in-phase input end of described comparator U1B simultaneously With the negative electrode of three terminal regulator U2, the plus earth of described three terminal regulator U2, described three terminal regulator The control end of U2 connects power supply, the in-phase input end of described comparator U1B and anti-phase input by divider resistance End connects divider resistance respectively, and the output of described comparator U1B terminates the anode of described diode D7, described The negative electrode of diode D7 connects the anode of described diode D5.

In said structure, described charge power supply includes sun-generated electric power and DC source.

The another object of this utility model embodiment is to provide a kind of light fixture, including LED load, described lamp Tool also includes that self-locking battery is crossed and puts overcharge protection circuit, and described self-locking battery is crossed and put overcharge protection circuit bag Including charge power supply and rechargeable battery BT1, described self-locking battery is crossed and is put overcharge protection circuit and also include:

In said structure, described latching circuit includes:

In this utility model embodiment, self-locking battery cross put overcharge protection circuit include control LED load The switching tube of supply access and latching circuit, be put into default under-voltage protection point when described rechargeable battery BT1 crosses Time, latching circuit controls described switching tube and turns off LED load supply access, as described rechargeable battery BT1 When crossing the over-voltage protection point being charged to preset, described rechargeable battery BT1 is discharged by latching circuit, thus real Show the mistake to rechargeable battery BT1 to let slip and fill protection, extend the life-span of battery.

Accompanying drawing explanation

Fig. 1 is that the circuit structure putting overcharge protection circuit crossed by the self-locking battery that this utility model embodiment provides Figure.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing And embodiment, this utility model is further elaborated.Should be appreciated that described herein specifically Embodiment, only in order to explain this utility model, is not used to limit this utility model.

Fig. 1 shows that the circuit putting overcharge protection circuit crossed by the self-locking battery that this utility model embodiment provides Structure, for convenience of description, illustrate only the part relevant to this utility model embodiment.

A kind of self-locking battery is crossed and is put overcharge protection circuit, connects LED load 1, and described self-locking battery is crossed and put Overcharge protection circuit includes that charge power supply 2 and rechargeable battery BT1, described charge power supply 2 meet rechargeable battery BT1 Positive pole, described self-locking battery crosses and puts overcharge protection circuit and also include:

First end and the second end connect described rechargeable battery BT1 positive pole and LED load 1 respectively, control described The switching tube 3 of LED load 1 supply access；

Control end with rechargeable battery BT1, switching tube 3 is connected respectively, puts when described rechargeable battery BT1 crosses During to the under-voltage protection point preset, control described switching tube 3 and turn off LED load supply access, or work as institute State rechargeable battery BT1 when crossing the over-voltage protection point being charged to preset, described rechargeable battery BT1 is discharged Latching circuit 4.

As this utility model one embodiment, described switching tube 3 uses metal-oxide-semiconductor Q1, described metal-oxide-semiconductor First end that drain electrode is described switching tube 3 of Q1, the source electrode of described metal-oxide-semiconductor Q1 is described switching tube 3 The second end, the grid of described metal-oxide-semiconductor Q1 is the control end of described switching tube 3.

As this utility model one embodiment, described latching circuit 4 includes:

As this utility model one embodiment, described charge power supply 2 includes sun-generated electric power and DC source.

As it is shown in figure 1, this utility model embodiment also provides for a kind of light fixture, including LED load 1, described Light fixture also includes that self-locking battery is crossed and puts overcharge protection circuit, and described self-locking battery is crossed and put overcharge protection circuit Including charge power supply 2 and rechargeable battery BT1, described self-locking battery is crossed and is put overcharge protection circuit and also include:

As this utility model one embodiment, described latching circuit 4 includes:

This self-locking battery is crossed and is put the operation principle of overcharge protection circuit and be:

Under normal running conditions, protective loop does not works, and the overvoltage being charged to set as rechargeable battery BT1 is protected When protecting, circuit discharges unnecessary electricity by audion Q3 and resistance R3, to rechargeable battery BT1 Carry out overcharging protection；When rechargeable battery BT1 is discharged into the under-voltage protection point of setting, by from comparing The triggering level of device U1B, makes latching circuit 4 work, and promotes metal-oxide-semiconductor Q1 to be off state all the time, Rechargeable battery BT1 is carried out Cross prevention, during until cell voltage refills electricity, then by comparator U1A Reversion comes automatic unlocking, the again normal operating conditions of restoring circuit.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should Within being included in protection domain of the present utility model.

Claims

1. self-locking battery is crossed and is put an overcharge protection circuit, connects LED load, it is characterised in that described Self-locking battery is crossed and is put overcharge protection circuit and include charge power supply and rechargeable battery BT1, described self-locking battery Cross and put overcharge protection circuit and also include:

2. self-locking battery as claimed in claim 1 is crossed and is put overcharge protection circuit, it is characterised in that described Switching tube uses first end that drain electrode is described switching tube of metal-oxide-semiconductor Q1, described metal-oxide-semiconductor Q1, described The source electrode of metal-oxide-semiconductor Q1 is the second end of described switching tube, and the grid of described metal-oxide-semiconductor Q1 is described switch The control end of pipe.

3. self-locking battery as claimed in claim 2 is crossed and is put overcharge protection circuit, it is characterised in that described Latching circuit includes:

4. self-locking battery as claimed in claim 3 is crossed and is put overcharge protection circuit, it is characterised in that described Charge power supply includes sun-generated electric power and DC source.

5. a light fixture, including LED load, it is characterised in that described light fixture also includes self-locking battery Crossing and put overcharge protection circuit, described self-locking battery is crossed and is put overcharge protection circuit and include charge power supply and charged electrical Pond BT1, described self-locking battery crosses and puts overcharge protection circuit and also include:

6. light fixture as claimed in claim 5, it is characterised in that described switching tube uses metal-oxide-semiconductor Q1, First end that drain electrode is described switching tube of described metal-oxide-semiconductor Q1, the source electrode of described metal-oxide-semiconductor Q1 is institute State the second end of switching tube, the control end that grid is described switching tube of described metal-oxide-semiconductor Q1.

7. light fixture as claimed in claim 6, it is characterised in that described latching circuit includes:

8. light fixture as claimed in claim 7, it is characterised in that described charge power supply includes sun-generated electric power And DC source.