CN205960725U - Take overcharge protection's charging indication circuit - Google Patents
Take overcharge protection's charging indication circuit Download PDFInfo
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- CN205960725U CN205960725U CN201620918588.3U CN201620918588U CN205960725U CN 205960725 U CN205960725 U CN 205960725U CN 201620918588 U CN201620918588 U CN 201620918588U CN 205960725 U CN205960725 U CN 205960725U
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Abstract
The utility model discloses a take overcharge protection's charging indication circuit, including charging the interface, a rechargeable battery and an unidirectional diode, still be equipped with overcharge protection circuit and charging indication circuit between an unidirectional diode and rechargeable battery, charging indication circuit includes the 5th resistance, the 2nd unidirectional diode, the second triode, the 6th resistance, the 7th resistance, first electric capacity and instruction LED lamp, the output at overcharge protection circuit is connected to the projecting pole of second triode, the collecting electrode is through the 7th resistance, connect the negative pole at rechargeable battery behind the instruction LED lamp current circuit, the base is through the positive pole of the 6th ohmic connection at rechargeable battery, a capacitance connection is between rechargeable battery's positive pole and negative pole. The utility model has the advantages of simple structure, the simple operation can be effectual reflects whether the battery is in the function that charges normal, and the stability in use is good, and the suitability is strong and the practicality is good through the bright of pilot lamp with going out.
Description
Technical field
This utility model belongs to charging circuit technical field and in particular to a kind of band overcharges the charging indication of protection.
Background technology
Portable illumination equipment is widely used in the middle of people's daily life, typically internal or external rechargeable battery,
This is just applied to various types of charging circuits, and typically carries charging indicator light.But most of charging indicator lights simply allow
User knows charging circuit in work, but whether battery is in normal charging condition and is typically difficult to learn；How to pass through display lamp
Light on and off reflection battery whether be in normal charging condition, this just to design propose a great challenge.
Content of the invention
The purpose of this utility model is to provide that a kind of structure is simple, stability in use is good and strong applicability band overcharges protection
Charging indication cannot reflect whether battery is in and charge normal shape it is intended to solve display lamp in conventional art charging circuit
The technical deficiency of state.
The technical scheme realizing this utility model purpose is the charging indication that a kind of band overcharges protection, including charging
Mouthful, rechargeable battery and the first unilateral diode being connected between the positive pole of charging inlet and rechargeable battery positive pole, described the
It is additionally provided with overcharge protection circuit and charging indication, described charging indication bag between one unilateral diode and rechargeable battery
Include the 5th resistance, the second unilateral diode, the second audion, the 6th resistance, the 7th resistance, the first electric capacity and indication LED lamp, institute
The emitter stage stating the second audion is connected to the outfan of overcharge protection circuit, colelctor electrode passes through the 7th resistance, indication LED lamp string
It is connected to the negative pole of rechargeable battery, base stage is connected to the positive pole of rechargeable battery by the 6th resistance, described first is electric after connection circuit
Hold and be connected between the positive pole of rechargeable battery and negative pole, after described 5th resistance is connected with the second unilateral diode and the described 5th
The other end of resistance is connected to the emitter stage of the second audion, the negative pole of the second unilateral diode is connected to the positive pole of rechargeable battery
On.
Described overcharge protection circuit include first resistor, second resistance, 3rd resistor, the 4th resistance, the 8th resistance, first
Audion and controllable accurate source of stable pressure, the colelctor electrode of described first audion is after first resistor, second resistance parallel circuit
It is connected on the negative pole of the first unilateral diode, the emitter stage phase of the emitter stage of described first audion and described second audion
Connect, the base stage of described first audion is connected to the negative pole of controllable accurate source of stable pressure, the positive pole of described controllable accurate source of stable pressure
It is connected to the negative pole of rechargeable battery, described 3rd resistor is connected between colelctor electrode and the base stage of the first audion, the described 4th
The other end of resistance and described 8th resistant series and the 4th resistance is connected on the emitter stage of the first audion, the 8th resistance
The other end is connected to the negative pole of rechargeable battery, and the control end of described controllable accurate source of stable pressure is connected to the 4th resistance and the 8th resistance
Junction point on.
Described first audion is NPN type triode.
Described second audion is PNP type triode.
This utility model has positive effect：Structure of the present utility model is simple, and simple operation is provided with and overcharges protection
Circuit and charging indication, and charging indication adopts audion to coordinate the 5th resistance to connect with the second unilateral diode
Biasing circuit, effectively can reflect whether battery is in the function of charging normal by the light on and off of display lamp, make
With good stability, strong applicability and practicality is good.
Brief description
In order that content of the present utility model is more likely to be clearly understood, below according to specific embodiment and with reference to attached
Figure, is described in further detail to this utility model, wherein：
Fig. 1 is structural representation of the present utility model.
Specific embodiment
（Embodiment 1）
Fig. 1 shows a kind of specific embodiment of the present utility model, and wherein Fig. 1 is structural representation of the present utility model
Figure.
See Fig. 1, a kind of band overcharges the charging indication of protection, fill including charging inlet 1, rechargeable battery 2 and being connected to
The first unilateral diode D1 between the positive pole of electrical interface 1 and rechargeable battery 2 positive pole, described first unilateral diode D1 with fill
It is additionally provided with overcharge protection circuit 3 and charging indication 4, described charging indication 4 includes the 5th resistance between battery 2
R5, the second unilateral diode D2, the second audion Q2, the 6th resistance R6, the 7th resistance R7, the first electric capacity C1 and indication LED lamp,
The emitter stage of described second audion Q2 is connected to the outfan of overcharge protection circuit 3, colelctor electrode passes through the 7th resistance R7, instruction
It is connected to the negative pole of rechargeable battery 2, base stage is connected to the positive pole of rechargeable battery 2 by the 6th resistance R6 after LED series circuit,
Described first electric capacity C1 is connected between positive pole and the negative pole of rechargeable battery 2, described 5th resistance R5 and the second unilateral diode
After D2 series connection and the other end of described 5th resistance R5 is connected to the emitter stage of the second audion Q2, the second unilateral diode D2
Negative pole is connected on the positive pole of rechargeable battery 2.
Described overcharge protection circuit 3 include first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 8th
Resistance R8, the first audion Q1 and controllable accurate source of stable pressure U1, the colelctor electrode of described first audion Q1 pass through first resistor R1,
Be connected to after second resistance R2 parallel circuit on the negative pole of the first unilateral diode D1, the emitter stage of described first audion Q1 with
The emitter stage of described second audion Q2 is connected, and the base stage of described first audion Q1 is connected to controllable accurate source of stable pressure U1's
Negative pole, the positive pole of described controllable accurate source of stable pressure U1 is connected to the negative pole of rechargeable battery 2, and described 3rd resistor R3 is connected to first
Between the colelctor electrode of audion Q1 and base stage, described 4th resistance R4 connect with described 8th resistance R8 and the 4th resistance R4 another
One end is connected on the emitter stage of the first audion Q1, the other end of the 8th resistance R8 is connected to the negative pole of rechargeable battery 2, described
The control end of controllable accurate source of stable pressure U1 is connected on the junction point of the 4th resistance R4 and the 8th resistance R8.
Described first audion is NPN type triode.
Described second audion is PNP type triode.
Charging circuit is accessed by charging inlet, and charging for battery through diode D1 provides voltage；Resistance R1, R2, R3,
R4, R8, Q1 and three-terminal voltage-stabilizing pipe U1 composition constant voltage circuit, to reach charging protection function；In circuit diagram, A point voltage is constant, leads to
Cross resistance R5 and diode D2 battery is charged；When battery is in normal charging condition, R5 and D2 have electric current by and
Forming bias voltage makes audion Q2 turn on, and charging indicator light LED lights；When battery can not charge normal or is in open-circuit condition
When, Q2 extinguishes by, display lamp LED because not having bias voltage；Thus can reach and electricity is reflected by the light on and off of display lamp
Whether pond is in the function of charging normal；Adjusting resistance R4 and R8, A point voltage being adjusted, thus reaching adjustment to overcharge protection
The effect of voltage.
Structure of the present utility model is simple, and simple operation is provided with overcharge protection circuit and charging indication, and charges
The biasing circuit that indicating circuit is in series with the second unilateral diode using audion cooperation the 5th resistance, can effectively pass through
The light on and off of display lamp reflects whether battery is in the function of charging normal, and stability in use is good, strong applicability and practicality
Good.
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate this utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need to give to all of embodiment
Exhaustive.And these belong to the obvious change that connotation of the present utility model extended out or change and still fall within this practicality
New protection domain.
Claims (4)
1. a kind of band overcharges the charging indication of protection, including charging inlet, rechargeable battery be just connected to charging inlet
The first unilateral diode between pole and rechargeable battery positive pole it is characterised in that：In described first unilateral diode and the electricity that charges
It is additionally provided with overcharge protection circuit and charging indication, described charging indication includes the 5th resistance, second unidirectional between pond
Diode, the second audion, the 6th resistance, the 7th resistance, the first electric capacity and indication LED lamp, the transmitting of described second audion
Pole is connected to the outfan of overcharge protection circuit, colelctor electrode is connected to charging after the 7th resistance, indication LED lamp series circuit
The negative pole of battery, base stage are connected to the positive pole of rechargeable battery by the 6th resistance, and described first capacitance connection is in rechargeable battery
Between positive pole and negative pole, after described 5th resistance is connected with the second unilateral diode and the other end of described 5th resistance is connected to
The emitter stage of the second audion, the negative pole of the second unilateral diode are connected on the positive pole of rechargeable battery.
2. band according to claim 1 overcharge protection charging indication it is characterised in that：Described overcharge protection circuit
Including first resistor, second resistance, 3rd resistor, the 4th resistance, the 8th resistance, the first audion and controllable accurate source of stable pressure,
The colelctor electrode of described first audion is connected to the negative of the first unilateral diode after first resistor, second resistance parallel circuit
Extremely go up, the emitter stage of described first audion is connected with the emitter stage of described second audion, the base of described first audion
Pole is connected to the negative pole of controllable accurate source of stable pressure, and the positive pole of described controllable accurate source of stable pressure is connected to the negative pole of rechargeable battery, institute
State between colelctor electrode and the base stage that 3rd resistor is connected to the first audion, described 4th resistance and described 8th resistant series and
The other end of the 4th resistance is connected on the emitter stage of the first audion, the other end of the 8th resistance is connected to the negative of rechargeable battery
Pole, the control end of described controllable accurate source of stable pressure is connected on the 4th resistance and the junction point of the 8th resistance.
3. band according to claim 2 overcharge protection charging indication it is characterised in that：Described first audion is
NPN type triode.
4. band according to claim 3 overcharge protection charging indication it is characterised in that：Described second audion is
PNP type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620918588.3U CN205960725U (en) | 2016-08-22 | 2016-08-22 | Take overcharge protection's charging indication circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620918588.3U CN205960725U (en) | 2016-08-22 | 2016-08-22 | Take overcharge protection's charging indication circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205960725U true CN205960725U (en) | 2017-02-15 |
Family
ID=57977942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620918588.3U Active CN205960725U (en) | 2016-08-22 | 2016-08-22 | Take overcharge protection's charging indication circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205960725U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751383A (en) * | 2020-12-29 | 2021-05-04 | 广东金莱特电器股份有限公司 | Charging circuit and electric fan |
-
2016
- 2016-08-22 CN CN201620918588.3U patent/CN205960725U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751383A (en) * | 2020-12-29 | 2021-05-04 | 广东金莱特电器股份有限公司 | Charging circuit and electric fan |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |