CN207368705U - A kind of mining intrinsic safety type nickel-hydrogen battery charging circuit - Google Patents
A kind of mining intrinsic safety type nickel-hydrogen battery charging circuit Download PDFInfo
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- CN207368705U CN207368705U CN201721355362.8U CN201721355362U CN207368705U CN 207368705 U CN207368705 U CN 207368705U CN 201721355362 U CN201721355362 U CN 201721355362U CN 207368705 U CN207368705 U CN 207368705U
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Abstract
Battery charger is the utility model is related to, specifically a kind of constant current source charging circuit of underground coal mine essential safe type Ni-MH battery.In mining intrinsic safety electro gas equipment, since intrinsic safety electric source capacity is relatively low, it can not meet the voltage stabilizing requirement of the larger circuit of power consumption in short-term, generally use rechargeable battery is as power supply.When using Ni-MH battery, can continuously it charge for a long time when battery is in trickle charge state, the service life and performance of battery are in optimum state.The constant pressure and flow source circuit can simplify the design of battery charger, the forward conduction voltage drop 0.6V of diode in circuit, triode operation is in saturation region, emitter and base stage pressure difference Veb are 0.6V, during triode saturation conduction, at battery both ends, loading constant voltage is 1.2 volts of VCC, and the constant-current source that 1.2V/R2 amperes of constant current, can change the charging current that constant-current source exports by adjusting the resistance value of current-limiting resistance R2.
Description
Technical field
The charging of underground coal mine intrinsically safe battery is the utility model is related to, specifically a kind of underground coal mine ni-mh electricity
The charging circuit in pond.
Background technology
In mining intrinsic safety electro gas equipment, since intrinsic safety electric source capacity is relatively low, it can not meet that power consumption is larger in short-term
The voltage stabilizing requirement of circuit, generally use rechargeable battery are powered as power supply.When using Ni-MH battery, its charging current
When size is 0.03-0.05 times of nominal capacity, battery is in trickle charge state, can continuously charge for a long time under this state,
The service life and performance of battery are in optimum state.Triode is Current amplifier device, is divided into two kinds of NPN and PNP, there is three
Pole, is called collector C, base stage B, emitter E respectively.Emitter current Ie=Ic+Ib, the Ib of a very little is supplemented in base stage,
A larger Ic can be obtained on collector, when larger base current makes triode enter saturation state, PNP
Pressure drop Veb between transistor emitter E to base stage B is 0.6V, the voltage Vce very littles between collector C and emitter E, hair
Emitter current is of substantially equal with collector current.
The content of the invention
The purpose of this utility model is a kind of simple and reliable nickel-hydrogen battery charging circuit of design, simplifies battery pack charging valve
Manage the design of circuit.
Technical solution is used by the utility model：The switching diode that power supply VCC passes through three model IN4148
The positive series connection of D1, D2, D3, is connected, base stage is grounded by divider resistance R1 and is formed into a loop with 9012 base stage of PNP triode；Power supply
VCC is connected by current-limiting resistance R2 with triode Q1 emitters, and triode Q1 collectors connection battery pack BT cathodes, connect power supply
Battery electrode is connect, electric current Ie is flowed into by transistor emitter to be flowed out by collector, forms charging current Ic, can be by adjusting limit
The size of the resistance value adjustment charging circuit of leakage resistance R2, circuit is simple and reliable on the premise of essential safety performance is ensured, meets
The charging performance requirement of Ni-MH battery group.
The beneficial effects of the utility model are：Reduce charge management circuit circuit board size, reduce design cost.
Brief description of the drawings：
Fig. 1：Nickel-hydrogen battery charging circuit figure.
Embodiment：
Three switching diodes D1, D2, D3 that intrinsic safety electric source VCC passes through model 1N4148 in this constant pressure and flow source circuit
Forward direction series connection, be connected with the PNP type triode Q1 base stages of model 9012 and by divider resistance R1 with connecing power supply, one
1N4148 forward conduction voltage drop 0.6V, the voltage of transistor base lie prostrate for VCC-3*0.6.Intrinsic safety electric source VCC passes through current-limiting resistance
R2 is connected with the emitter of triode Q1, and pressure difference Veb of the triode operation between saturation region, emitter and base stage is 0.6 volt, institute
Using resistance R2 pressure differences as 1.2 volts, Ie=1.2/R2 amperes of emitter constant current is calculated by I=U/R, in saturation region emitter
Electric current Ie and collector current Ic approximately equals, so in battery plus-negative plate loading constant voltage VCC-1.2 volts, constant current
1.2V/R2 amperes of electric current, charges to battery, and the size of charging current is adjusted by the resistance value of R2.To ensure triode operation
In saturation state, its base voltage have to be larger than 0.7 volt, therefore power supply VCC-3*0.6 have to be larger than 0.7 volt, and VCC have to be larger than
2.5 volts, during actual use, appropriate power supply VCC is selected according to the operating voltage of battery, it is ensured that the charging voltage of battery is big
Voltage is full of in battery.
Claims (1)
- A kind of 1. mining intrinsic safety type nickel-hydrogen battery charging circuit, it is characterised in that：Intrinsic safety electric source (VCC) passes through model The positive series connection of three switching diodes (D1, D2, D3) of IN4148, is connected with PNP triode (Q1) base stage of model 9012 And, intrinsic safety electric source (VCC) is connected by current-limiting resistance (R2) and triode (Q1) emitter by divider resistance (R1) with connecing power supply Connect, triode (Q1) collector connection Ni-MH battery (BT) cathode, connects nickel-hydrogen battery negative pole, electric current (Ie) is by three poles power supply The input of (Q1) emitter, collector output are managed, charging current (Ic) is formed and charges to Ni-MH battery, can be by adjusting current-limiting resistance (R2) size of resistance value adjustment charging current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721355362.8U CN207368705U (en) | 2017-10-12 | 2017-10-12 | A kind of mining intrinsic safety type nickel-hydrogen battery charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721355362.8U CN207368705U (en) | 2017-10-12 | 2017-10-12 | A kind of mining intrinsic safety type nickel-hydrogen battery charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207368705U true CN207368705U (en) | 2018-05-15 |
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ID=62420689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721355362.8U Active CN207368705U (en) | 2017-10-12 | 2017-10-12 | A kind of mining intrinsic safety type nickel-hydrogen battery charging circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN207368705U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474037A (en) * | 2018-12-07 | 2019-03-15 | 成都芯源系统有限公司 | Battery charging circuit and control method thereof |
| CN113612200A (en) * | 2021-07-30 | 2021-11-05 | 中汽创智科技有限公司 | Charging protection device for integrated brake system and vehicle |
-
2017
- 2017-10-12 CN CN201721355362.8U patent/CN207368705U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474037A (en) * | 2018-12-07 | 2019-03-15 | 成都芯源系统有限公司 | Battery charging circuit and control method thereof |
| CN113612200A (en) * | 2021-07-30 | 2021-11-05 | 中汽创智科技有限公司 | Charging protection device for integrated brake system and vehicle |
| CN113612200B (en) * | 2021-07-30 | 2024-09-10 | 中汽创智科技有限公司 | Charging protection device for integrated braking system and vehicle |
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