CN207853526U - A kind of discharge protection circuit of portable emergency power supply - Google Patents
A kind of discharge protection circuit of portable emergency power supply Download PDFInfo
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- CN207853526U CN207853526U CN201820111366.XU CN201820111366U CN207853526U CN 207853526 U CN207853526 U CN 207853526U CN 201820111366 U CN201820111366 U CN 201820111366U CN 207853526 U CN207853526 U CN 207853526U
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- triode
- foot
- relay
- rechargeable battery
- diode
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Abstract
The utility model provides a kind of discharge protection circuit of portable emergency power supply, positive the 1st foot with the cathode of diode D2 and relay J1 respectively of rechargeable battery E, 2nd foot is connected, the anode of diode D2 is connected by switch K1 with the cathode of rechargeable battery E, the anode of diode D2 is also connected with the 5th foot of the collector of triode Q2 and relay J1 respectively, the emitter of triode Q2 is connected with the cathode of rechargeable battery E, the base stage of triode Q2 is connected with the emitter of triode Q1, the base stage of triode Q1 is connected by resistance R2 with the cathode of rechargeable battery E, the base stage of triode Q1 is also connected by resistance R1 with the 3rd foot of relay J1, the collector of triode Q1 is also connected by resistance R3 with the 3rd foot of relay J1.The discharge protection circuit of the portable emergency power supply of the utility model can carry out discharge prevention to rechargeable battery.
Description
Technical field
The utility model is related to field of batteries, more particularly to a kind of discharge protection circuit of portable emergency power supply.
Background technology
Car emergency startup power supply be to drive trip love vehicle personage and business people developed it is a multi-functional
Portable power source.Its featured function can be started when can not starting automobile for automobile power shortage or other reasons
Automobile, while inflator pump being combined with functions such as emergency power supply, outdoor lightings, it is one of the product of outdoor trip indispensability.
Car emergency startup power supply design concept is easy to operate, is convenient for carrying, while coping with various emergencies.Mesh
Preceding car emergency startup power supply on the market is mainly two kinds, and one is lead-acid accumulator class, another kind is lighium polymer class
's.
The battery for no matter using type, usually all supports AC charging and DC charging, in the process using DC charging
In, when the voltage of usual DC power supply is the rated voltage for being greater than battery, it could be convenient for quickly being full of battery in this way, so
And during electric discharge, once cell voltage is too low and is still working, it would be possible to and cause battery decompression to work, leads to battery
Service life reduction.
Utility model content
The purpose of this utility model is to provide a kind of discharge protection circuit of portable emergency power supply, above-mentioned existing to solve
Technology there are the problem of.
In the utility model embodiment, a kind of discharge protection circuit of portable emergency power supply is provided comprising fill
Battery E, relay J1, resistance R1, R2, R3, triode Q1, Q2, diode D2 and switch K1, the anode point of rechargeable battery E
Be not connected with the 1st foot, the 2nd foot of the cathode of diode D2 and relay J1, diode D2 anode by switch K1 with fill
The cathode of battery E is connected, anode also the 5th foot phase with the collector of triode Q2 and relay J1 respectively of diode D2
Connection, the emitter of triode Q2 are connected with the cathode of rechargeable battery E, the emitter of the base stage and triode Q1 of triode Q2
It is connected, the base stage of triode Q1 is connected by resistance R2 with the cathode of rechargeable battery E, and the base stage of triode Q1 also passes through electricity
Resistance R1 is connected with the 3rd foot of relay J1, and the collector of triode Q1 is also connected by resistance R3 with the 3rd foot of relay J1
It connects.
In the utility model embodiment, the discharge protection circuit of the portable emergency power supply further includes diode D1, and two
The anode of pole pipe D1 is connected with resistance R1, and the cathode of diode D1 is connected with the 3rd foot of relay J1.
In the utility model embodiment, the discharge protection circuit of the portable emergency power supply further includes being connected to charging electricity
Load between the cathode of pond E and the 3rd foot of relay J1.
Compared with prior art, the discharge protection circuit of the portable emergency power supply of the utility model is used by three poles
The circuit of pipe T1, T2 composition, can be when rechargeable battery charges, triode T1 cut-offs, triode T2 conductings, to be filled
Electricity；When rechargeable battery is fully charged, triode T2 cut-offs, triode T1 conductings to stop charging, prevent rechargeable battery two
The voltage at end is long-term excessively high and causes to damage；In addition, indicate whether charging is completed using light emitting diode D2, convenient for user and
Shi Faxian charging completes.
Description of the drawings
Fig. 1 is the circuit diagram of the discharge protection circuit of the portable emergency power supply of one embodiment of the utility model.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The realization of the utility model is described in detail below in conjunction with specific embodiment.
As shown in Figure 1, a kind of discharge protection circuit of portable emergency power supply is provided in the utility model embodiment,
It includes rechargeable battery E, relay J1, resistance R1, R2, R3, triode Q1, Q2, diode D1, D2 and switch K1, charging electricity
The anode of pond E is connected with the 1st foot, the 2nd foot of the cathode of diode D2 and relay J1 respectively, and the anode of diode D2 passes through
Switch K1 is connected with the cathode of rechargeable battery E, diode D2 anode also respectively with the collector and relay of triode Q2
The 5th foot of J1 is connected, and the emitter of triode Q2 is connected with the cathode of rechargeable battery E, the base stage of triode Q2 and three poles
The emitter of pipe Q1 is connected, and the base stage of triode Q1 is connected by resistance R2 with the cathode of rechargeable battery E, triode Q1's
Base stage is also connected by resistance R1 and diode D1 with the 3rd foot of relay J1, and the collector of triode Q1 also passes through resistance
R3 is connected with the 3rd foot of relay J1.The anode of diode D1 is connected with resistance R1, the cathode and relay of diode D1
The 3rd foot of J1 is connected.
Further, load is connected between the cathode of rechargeable battery E and the 3rd foot of relay J1.The rechargeable battery E
Lithium ion battery may be used.
The operation principle of foregoing circuit is as follows：
When needing electricity consumption.Button press switch K1, at this time the coil of relay J1 obtain electric actuation, while relay contact
1 connects with the closure of contact 3, and the positive voltage of rechargeable battery E flows through contact 3 from contact 1；Circuit work once electrified.When rechargeable battery E electricity
Zener diode D1 breakdown conductings when pressure is higher than the voltage set, the conducting of triode Q1, Q2 positively biased, circuit are still in normally
Working condition.When rechargeable battery E voltage less than setting voltage constantly, diode Dl reversely end, so as to cause triode
Q1, Q2 cut-off, relay J1 power-off, have reached and have automatically powered off, protection rechargeable battery E.
In conclusion in the discharge protection circuit of the portable emergency power supply of the utility model, J1 pairs of relay is used
The electric discharge of rechargeable battery E is controlled, and the circuit for using triode Q1, Q2 and diode D1 compositions comes to rechargeable battery E
Voltage be detected, when the voltage as rechargeable battery E less than setting voltage constantly, diode Dl reversely end, to lead
Triode Q1, Q2 cut-off, relay J1 power-off are caused, has reached and has automatically powered off, be effectively protected rechargeable battery E, improving makes
Use the service life.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (3)
1. a kind of discharge protection circuit of portable emergency power supply, which is characterized in that including rechargeable battery E, relay J1, resistance
R1, R2, R3, triode Q1, Q2, diode D2 and switch K1, rechargeable battery E anode respectively with the cathode of diode D2 and after
The 1st foot, the 2nd foot of electric appliance J1 is connected, and the anode of diode D2 is connected by switch K1 with the cathode of rechargeable battery E, and two
The anode of pole pipe D2 is also connected with the 5th foot of the collector of triode Q2 and relay J1 respectively, the emitter of triode Q2
It is connected with the cathode of rechargeable battery E, the base stage of triode Q2 is connected with the emitter of triode Q1, the base stage of triode Q1
It is connected with the cathode of rechargeable battery E by resistance R2, the base stage of triode Q1 also passes through the 3rd foot of resistance R1 and relay J1
It is connected, the collector of triode Q1 is also connected by resistance R3 with the 3rd foot of relay J1.
2. the discharge protection circuit of portable emergency power supply as described in claim 1, which is characterized in that further include diode
The anode of D1, diode D1 are connected with resistance R1, and the cathode of diode D1 is connected with the 3rd foot of relay J1.
3. the discharge protection circuit of portable emergency power supply as claimed in claim 2, which is characterized in that further include being connected to fill
Load between the cathode of battery E and the 3rd foot of relay J1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820111366.XU CN207853526U (en) | 2018-01-23 | 2018-01-23 | A kind of discharge protection circuit of portable emergency power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820111366.XU CN207853526U (en) | 2018-01-23 | 2018-01-23 | A kind of discharge protection circuit of portable emergency power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207853526U true CN207853526U (en) | 2018-09-11 |
Family
ID=63416026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820111366.XU Active CN207853526U (en) | 2018-01-23 | 2018-01-23 | A kind of discharge protection circuit of portable emergency power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207853526U (en) |
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2018
- 2018-01-23 CN CN201820111366.XU patent/CN207853526U/en active Active
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