CN205509479U - Over -discharge protection circuit - Google Patents
Over -discharge protection circuit Download PDFInfo
- Publication number
- CN205509479U CN205509479U CN201620131019.4U CN201620131019U CN205509479U CN 205509479 U CN205509479 U CN 205509479U CN 201620131019 U CN201620131019 U CN 201620131019U CN 205509479 U CN205509479 U CN 205509479U
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- diode
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- field effect
- effect transistor
- negative pole
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- 230000005669 field effect Effects 0.000 claims abstract description 18
- 238000013016 damping Methods 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 230000002498 deadly effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an over -discharge protection circuit, put U2, potentiometre RP3, band stop buddhist nun field effect transistor VS and emitting diode LED including resistance R3, electric capacity C1, potentiometre RP2, fortune, it is anodal that battery E is connected respectively to resistance R3 one end, diode D5 is anodal, resistance R4, electric capacity C1 summation potential ware RP2 one end, it is anodal that diode D4 is connected to the resistance R3 other end, diode D5 negative pole is connected respectively to diode D4 negative pole and emitting diode LED is anodal, emitting diode LED negative pole connected load RL, load RL other end connecting band damping field effect transistor VS's the D utmost point, potentiometre RP3 one end is connected respectively to band stop buddhist nun field effect transistor VS's the S utmost point, the potentiometre RP2 other end, the electric capacity C1 other end, diode D6 anodal and battery E negative pole and ground connection. The utility model discloses over -discharge protection circuit adopts fortune to put the U2 cooperation to take damped field effect transistor VS as the controller, and circuit structure is simple, and is with low costs, control deadly from starting to control, and battery E voltage only need change tens of millivolts, and the switching control is fast.
Description
Technical field
This utility model relates to a kind of protection circuit, specifically a kind of over-discharge protection circuit.
Background technology
Chemical energy is converted into the device of electric energy chemical cell, and commonly abbreviated as battery, after electric discharge, it is possible in making by the mode of charging
Portion's active substance regeneration, is chemical energy electrical power storage, needs again chemical energy to be converted to electric energy during electric discharge, is claimed by this kind of battery
For accumulator, also referred to as secondary cell.
Accumulator as a kind of can with the power store of Reusability, apply widely, but the service life of accumulator with
Its most excessive electric discharge has very big relation, frequent overdischarge, and meeting high degree shortens the life-span of accumulator, more existing
Battery discharging protection circuit uses single-chip microcomputer as detection control core, and structure is complicated, and cost is high, is difficult to popularization and application.
Utility model content
The purpose of this utility model is to provide a kind of over-discharge protection circuit, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of over-discharge protection circuit, including resistance R3, electric capacity C1, potentiometer RP2, amplifier U2, potentiometer RP3, band resistance
Buddhist nun's field effect transistor VS and LED, described resistance R3 one end connect respectively battery E positive pole, diode D5 positive pole,
Resistance R4, electric capacity C1 and potentiometer RP2 one end, the resistance R3 other end connects diode D4 positive pole, and diode D4 negative pole divides
Not Lian Jie diode D5 negative pole and LED positive pole, LED negative pole connect load RL, load RL another
One end connects the D pole of band damping field effect transistor VS, and the S pole of band damping field effect transistor VS connects potentiometer RP3 one end, electricity respectively
The position device RP2 other end, the electric capacity C1 other end, diode D6 Anode and battery E negative pole ground connection, band damping field effect transistor VS
G pole connect potentiometer RP3 slide plate, the potentiometer RP3 other end connect amplifier U2 outfan, amplifier U2 in-phase end connect current potential
Device RP2 slide plate, amplifier U2 end of oppisite phase connects the resistance R4 other end and diode D6 negative pole respectively.
As further program of the utility model: described diode D6 is Zener diode.
As this utility model further scheme: described amplifier U2 uses LM324.
Compared with prior art, the beneficial effects of the utility model are: this utility model over-discharge protection circuit uses amplifier U2 to join
Field effect transistor VS of crossed belt damping is as controller, and circuit structure is simple, and low cost, volume is little, extremely (cuts completely from starting to control to control
Disconnected load RL loop), battery E voltage only needs to change tens of millivolt, and switching control speed is fast.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of over-discharge protection circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments wholely.Base
Embodiment in this utility model, those of ordinary skill in the art obtained under not making creative work premise all its
His embodiment, broadly falls into the scope of this utility model protection.
Referring to Fig. 1, in this utility model embodiment, a kind of over-discharge protection circuit, including resistance R3, electric capacity C1, current potential
Device RP2, amplifier U2, potentiometer RP3, band damping field effect transistor VS and LED, described resistance R3 one end is respectively
Connecting battery E positive pole, diode D5 positive pole, resistance R4, electric capacity C1 and potentiometer RP2 one end, the resistance R3 other end connects
Diode D4 positive pole, diode D4 negative pole connects diode D5 negative pole and LED positive pole, light emitting diode respectively
LED negative pole connects load RL, and the load RL other end connects the D pole of band damping field effect transistor VS, band damping field effect transistor VS
S pole connects potentiometer RP3 one end, the potentiometer RP2 other end, the electric capacity C1 other end, diode D6 Anode and battery E respectively
Negative pole ground connection, the G pole of band damping field effect transistor VS connects potentiometer RP3 slide plate, and the potentiometer RP3 other end connects amplifier U2
Outfan, amplifier U2 in-phase end connects potentiometer RP2 slide plate, and amplifier U2 end of oppisite phase connects the resistance R4 other end and two poles respectively
Pipe D6 negative pole；Described diode D6 is Zener diode；Described amplifier U2 uses LM324.
Operation principle of the present utility model is: refer to Fig. 1, this utility model at protection Near The Critical Point, from start to control control dead (the completeest
Full cut-out loads RL loop), battery E voltage only needs to change tens of millivolt.
RP2 is used for adjusting protection and critical starts to control a little, and RP3 also can regulate that protection is critical starts to control a little within the specific limits, and VS is band damping
VMOS power field effect pipe, its maximum current is 30A, and saturation voltage drop is 0.1-0.3V, and grid source critical conduction voltage is about 4V.
When load RL battery E power and voltage more than setting value V1 time, U2 export high level, and VS is fully on, and load is normally
Work, when battery E voltage is down to V1, U2 outfan is low level, and VS is completely switched off, cuts off load RL loop, thus
Avoid the generation of overdischarge phenomenon；Light-Emitting Diode LED is for the duty of indicating circuit.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and do not carrying on the back
In the case of spirit or essential attributes of the present utility model, it is possible to realize this utility model in other specific forms.Therefore, nothing
Opinion, from the point of view of which point, all should be regarded embodiment as exemplary, and be nonrestrictive, and scope of the present utility model is by institute
Attached claim rather than described above limit, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in this utility model.Should not be considered as limiting involved claim by any reference in claim.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only comprises one
Independent technical scheme, this narrating mode of description is only that for clarity sake description should be made by those skilled in the art
Be an entirety, the technical scheme in each embodiment can also through appropriately combined, formed it will be appreciated by those skilled in the art that other
Embodiment.
Claims (3)
1. an over-discharge protection circuit, including resistance R3, electric capacity C1, potentiometer RP2, amplifier U2, electricity
Position device RP3, band damping field effect transistor VS and LED, it is characterised in that described resistance R3 mono-
End connects battery E positive pole, diode D5 positive pole, resistance R4, electric capacity C1 and potentiometer RP2 one end respectively,
The resistance R3 other end connects diode D4 positive pole, and diode D4 negative pole connects diode D5 negative pole respectively and sends out
Optical diode LED positive pole, LED negative pole connects load RL, and the load RL other end connects band resistance
The D pole of Buddhist nun's field effect transistor VS, the S pole of band damping field effect transistor VS connects potentiometer RP3 one end, electricity respectively
The position device RP2 other end, the electric capacity C1 other end, diode D6 Anode and battery E negative pole ground connection, band damps
The G pole of field effect transistor VS connects potentiometer RP3 slide plate, and the potentiometer RP3 other end connects amplifier U2 outfan,
Amplifier U2 in-phase end connect potentiometer RP2 slide plate, amplifier U2 end of oppisite phase connect respectively the resistance R4 other end and
Diode D6 negative pole.
Over-discharge protection circuit the most according to claim 1, it is characterised in that described diode D6 is
Zener diode.
Over-discharge protection circuit the most according to claim 1, it is characterised in that described amplifier U2 uses
LM324。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620131019.4U CN205509479U (en) | 2016-02-19 | 2016-02-19 | Over -discharge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620131019.4U CN205509479U (en) | 2016-02-19 | 2016-02-19 | Over -discharge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205509479U true CN205509479U (en) | 2016-08-24 |
Family
ID=56725068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620131019.4U Active CN205509479U (en) | 2016-02-19 | 2016-02-19 | Over -discharge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205509479U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649677A (en) * | 2019-09-30 | 2020-01-03 | 中国船舶重工集团公司第七0七研究所 | Automatic power-off protection device for storage battery |
-
2016
- 2016-02-19 CN CN201620131019.4U patent/CN205509479U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649677A (en) * | 2019-09-30 | 2020-01-03 | 中国船舶重工集团公司第七0七研究所 | Automatic power-off protection device for storage battery |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |