CN206977074U - A kind of band reverse connecting protection constant-current type charging circuit - Google Patents
A kind of band reverse connecting protection constant-current type charging circuit Download PDFInfo
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- CN206977074U CN206977074U CN201720466466.XU CN201720466466U CN206977074U CN 206977074 U CN206977074 U CN 206977074U CN 201720466466 U CN201720466466 U CN 201720466466U CN 206977074 U CN206977074 U CN 206977074U
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- charging circuit
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Abstract
The utility model discloses a kind of band reverse connecting protection constant-current type charging circuit; the rechargeable battery being connected including interface socket, with the interface socket; constant-current charging circuit, indication LED lamp and reverse-connection protection circuit are additionally provided between the interface socket and rechargeable battery; the constant-current charging circuit includes the second triode, first resistor, second resistance, the second unilateral diode, and the reverse-connection protection circuit includes the 4th resistance, the first triode, the 3rd unilateral diode and the first unilateral diode.Structure setting of the present utility model is reasonable, can effectively realize reverse connecting protection and just connect the purpose of constant-current charge, stability in use is good and strong applicability, practicality are good.
Description
Technical field
The utility model belongs to charging circuit technical field, and in particular to a kind of band reverse connecting protection constant-current type charging circuit.
Background technology
Portable illumination equipment is widely used among our daily lifes, and many products are equipped with rechargeable battery, but
It is if without protection structure, is charged after battery is reversed, then can cause greatly to endanger, how ensures battery reversed
When also circuit will not be caused damage is that those skilled in the art of the present technique need the technical barrier that solves.
The content of the invention
The purpose of this utility model is to provide the band reverse connecting protection constant current that a kind of structure setting is reasonable and stability in use is good
Type charging circuit.
The technical scheme for realizing the utility model purpose is that one kind is inserted with reverse connecting protection constant-current type charging circuit, including interface
Seat, the rechargeable battery being connected with the interface socket, constant-current charge is additionally provided between the interface socket and rechargeable battery
Circuit, indication LED lamp and reverse-connection protection circuit, the constant-current charging circuit include the second triode, first resistor, the second electricity
Resistance, the second unilateral diode, the reverse-connection protection circuit include the 4th resistance, the first triode, the 3rd unilateral diode and the
One unilateral diode, the emitter stage of second triode after first resistor, second resistance series connection by being connected to interface socket
Positive pole, colelctor electrode is connected by the second unilateral diode with the positive pole of rechargeable battery and base stage is connected by indication LED lamp
In the positive pole of interface socket, the colelctor electrode of first triode is connected in the base stage of the second triode by the 5th resistance,
Emitter stage is grounded by the 3rd unilateral diode and base stage is connected to the positive pole of interface socket by the 4th resistance, and described first is single
The base stage of the first triode is connected to the positive pole of diode and negative pole is connected on the positive pole of rechargeable battery.
First triode is NPN type triode and the second triode is PNP type triode.
The resistance of the first resistor and second resistance is 5.1 Ω, and the resistance of the 4th resistance is 10k Ω and the 5th electricity
The resistance of resistance is 3k Ω.
Its operation principle is summarized as follows：External power source is charged by interface socket DC1 to battery；When battery correctly connects
After entering circuit, the first triode Q1 base potentials are relative to transmitting extremely high level and are more than 0.7V, and have enough base stages
Electric current, Q1 saturation conductions；Supply voltage passes through the triode Q1 of indicator lamp LED1, the 5th resistance R5, first and the 3rd unidirectional two pole
Pipe D3 forms loop, and indicator lamp LED1 is lighted；Due to pressure drop substantially constant in both ends when LED1 is turned on, and it is more than 0.7V, has more
Voltage constant charging current (i.e. Q2 emitter currents) is formed by first resistor R1 and second resistance R2, to battery progress
Charging；When battery is reversed, 0.7V voltage difference could not be formed between the first triode Q1 base stages and emitter stage, Q1 ends,
Indicator lamp LED1 extinguishes no charging current simultaneously and electric current will not pour in down a chimney, and reaches defencive function.
The utility model has positive effect：Structure setting of the present utility model is reasonable, can effectively realize that reversal connection is protected
Shield and the purpose for just connecing constant-current charge, stability in use is good and strong applicability, practicality are good.
Brief description of the drawings
In order that content of the present utility model is more likely to be clearly understood, below according to specific embodiment and combine attached
Figure, is described in further detail to the utility model, wherein：
Fig. 1 is structural representation of the present utility model.
Embodiment
(embodiment 1)
Fig. 1 shows a kind of 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 reverse connecting protection constant-current type charging circuit, including interface socket 1, be connected with the interface socket 1
The rechargeable battery 2 connect, be additionally provided between the interface socket 1 and rechargeable battery 2 constant-current charging circuit 3, indication LED lamp 4 and
Reverse-connection protection circuit 5, the constant-current charging circuit 3 include the second triode Q2, first resistor R1, second resistance R2, the second list
To diode D2, the reverse-connection protection circuit 5 includes the 4th resistance R4, the first triode Q1, the 3rd unilateral diode D3 and the
One unilateral diode D1, the second triode Q2 emitter stage is connected to after being connected by first resistor R1, second resistance R2
The positive pole of interface socket 1, colelctor electrode is connected by the second unilateral diode D2 with the positive pole of rechargeable battery 2 and base stage passes through finger
Show that LED 4 is connected to the positive pole of interface socket 1, the colelctor electrode of the first triode Q1 is connected to by the 5th resistance R5
In two triode Q2 base stage, emitter stage is grounded by the 3rd unilateral diode D3 and base stage is connected to by the 4th resistance R4 and connect
The positive pole of mouth socket 1, the positive pole of the first unilateral diode D1 is connected to the first triode Q1 base stage and negative pole is connected to
On the positive pole of rechargeable battery 2.
First triode is NPN type triode and the second triode is PNP type triode.
The resistance of the first resistor and second resistance is 5.1 Ω, and the resistance of the 4th resistance is 10k Ω and the 5th electricity
The resistance of resistance is 3k Ω.
Its operation principle is summarized as follows：External power source is charged by interface socket DC1 to battery；When battery correctly connects
After entering circuit, the first triode Q1 base potentials are relative to transmitting extremely high level and are more than 0.7V, and have enough base stages
Electric current, Q1 saturation conductions；Supply voltage passes through the triode Q1 of indicator lamp LED1, the 5th resistance R5, first and the 3rd unidirectional two pole
Pipe D3 forms loop, and indicator lamp LED1 is lighted；Due to pressure drop substantially constant in both ends when LED1 is turned on, and it is more than 0.7V, has more
Voltage constant charging current (i.e. Q2 emitter currents) is formed by first resistor R1 and second resistance R2, to battery progress
Charging；When battery is reversed, 0.7V voltage difference could not be formed between the first triode Q1 base stages and emitter stage, Q1 ends,
Indicator lamp LED1 extinguishes no charging current simultaneously and electric current will not pour in down a chimney, and reaches defencive function.
Structure setting of the present utility model is reasonable, can effectively realize reverse connecting protection and just connect the purpose of constant-current charge, make
With stability, good and strong applicability, practicality are good.
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the 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 and unable to give all embodiments
It is exhaustive.And these belong to the obvious changes or variations that connotation of the present utility model is extended out and still fall within this practicality
New protection domain.
Claims (3)
1. a kind of band reverse connecting protection constant-current type charging circuit, including interface socket, the charging that is connected with the interface socket are electric
Pond, it is characterised in that：Constant-current charging circuit, indication LED lamp and reversal connection are additionally provided between the interface socket and rechargeable battery
Protection circuit, the constant-current charging circuit includes the second triode, first resistor, second resistance, the second unilateral diode, described
Reverse-connection protection circuit includes the 4th resistance, the first triode, the 3rd unilateral diode and the first unilateral diode, and the described 2nd 3
The emitter stage of pole pipe is single by second by positive pole, the colelctor electrode that interface socket is connected to after first resistor, second resistance series connection
It is connected to diode with the positive pole of rechargeable battery and base stage is connected to the positive pole of interface socket by indication LED lamp, described
The colelctor electrode of one triode is connected in the base stage of the second triode by the 5th resistance, emitter stage passes through the 3rd unilateral diode
Ground connection and base stage are connected to the positive pole of interface socket by the 4th resistance, and the positive pole of first unilateral diode is connected to first
The base stage and negative pole of triode are connected on the positive pole of rechargeable battery.
2. band reverse connecting protection constant-current type charging circuit according to claim 1, it is characterised in that：First triode is
NPN type triode and the second triode are PNP type triode.
3. band reverse connecting protection constant-current type charging circuit according to claim 2, it is characterised in that：The first resistor and
The resistance of two resistance is 5.1 Ω, and the resistance of the 4th resistance is 10k Ω and the resistance of the 5th resistance is 3k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720466466.XU CN206977074U (en) | 2017-04-28 | 2017-04-28 | A kind of band reverse connecting protection constant-current type charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720466466.XU CN206977074U (en) | 2017-04-28 | 2017-04-28 | A kind of band reverse connecting protection constant-current type charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206977074U true CN206977074U (en) | 2018-02-06 |
Family
ID=61412501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720466466.XU Active CN206977074U (en) | 2017-04-28 | 2017-04-28 | A kind of band reverse connecting protection constant-current type charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206977074U (en) |
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2017
- 2017-04-28 CN CN201720466466.XU patent/CN206977074U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221228 Address after: 529000 Room 203, Floor 2, Building 1, No. 21, Jintong Road, Tangxia Town, Pengjiang District, Jiangmen City, Guangdong Province Patentee after: Jiangmen Xiaosong Intelligent Technology Co.,Ltd. Address before: 529000 301, Floor 3, Building 2, No. 21, Jintong Road, Tangxia Town, Pengjiang District, Jiangmen City, Guangdong Province Patentee before: JIANGMEN PENGJIANG DISTRICT JINYING TECHNOLOGY Co.,Ltd. |