CN203537008U - Large current circuit of preventing battery reverse connection - Google Patents
Large current circuit of preventing battery reverse connection Download PDFInfo
- Publication number
- CN203537008U CN203537008U CN201320647970.1U CN201320647970U CN203537008U CN 203537008 U CN203537008 U CN 203537008U CN 201320647970 U CN201320647970 U CN 201320647970U CN 203537008 U CN203537008 U CN 203537008U
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- effect transistor
- field effect
- resistor
- bat
- resistance
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a large current circuit of preventing battery reverse connection, and especially relates to a large current circuit of preventing battery reverse connection for a large output current charger. The circuit comprises a resistor R1, a resistor R2, a resistor R3, a triode Q1, a field effect transistor Q2, a BAT+ terminal, and a BAT- terminal; an e of the triode Q1 is connected with an output positive pole OUT + of the charger and the BAT+ terminal; a b of the triode Q1 is connected with one end of the resistor R1; a c of the triode Q1 is connected with one end of the resistor R3; the other end of the resistor R1 is connected with a D of the field effect transistor Q2 and the BAT- terminal; the other end of the resistor R3 is connected with a G of the field effect transistor Q2 and the other end of the resistor R2; and an S of the field effect transistor Q2 is connected with the other end of the resistor R2 and an output negative pole OUT- of the charger. The circuit of the utility model adopts combination of the field effect transistor, the resistor and the triode, the battery reverse connection accident is effectively avoided; at the same time, since the field effect transistor is small in size, the problem of a conventional charger being large in size is effectively solved; and the cost is low.
Description
Technical field
The utility model relates to a kind of anti-battery reversal connection circuit, relates in particular to a kind of anti-battery reversal connection of large electric current circuit for large output current charger.
Background technology
At present, various to the charger of charge in batteries in, be generally provided with the reverse-connection preventing circuit of anti-battery error-polarity connection, to prevent that the charger output circuit that reverse access was caused of storage battery from damaging, with the Damage by Short Circuit of storage battery.Conventional reverse-connection preventing circuit as shown in Figure 1, comprise relay K and diode, the moving contact of relay K connects the output cathode OUT+ of charger, one end of fixed contact and coil is connected BAT+ end simultaneously, the other end of the coil of relay K connects the positive pole of diode D, and the negative pole of diode D connects output negative pole OUT-and the BAT-end of charger; If this main circuit is completed by relay.When the capacity of storage battery is very large, while requiring the output current of charger very large, use relay as the main devices of reverse-connection preventing circuit, seem that volume is large, cost is high, does not even have suitable relay available.
Utility model content
The purpose of this utility model is to change deficiency of the prior art, and the anti-battery reversal connection of a kind of large electric current circuit is provided.
The technical scheme that the utility model adopts:
The anti-battery reversal connection of a kind of large electric current circuit, it is characterized in that: this circuit comprises resistance R 1, resistance R 2, resistance R 3, triode Q1, field effect transistor Q2, BAT+ end, BAT-end, the emitter e of described triode Q1 connects output cathode OUT+ and the BAT+ end of charger, one end of base stage b contact resistance R1, one end of collector electrode c contact resistance R3; The other end of described resistance R 1 connects drain D and the BAT-end of field effect transistor Q2; The other end of described resistance R 3 connects the grid G of field effect transistor Q2 and one end of resistance R 2; The other end of source S contact resistance R2 of described field effect transistor Q2 and the output negative pole OUT-of charger.
The beneficial effects of the utility model:
The utility model circuit adopts field effect transistor in conjunction with resistance and triode, has effectively avoided the generation of reversal connection short circuit accident, simultaneously because field effect transistor volume is little, has effectively solved the bulky problem of existing charger, and with low cost.
Accompanying drawing explanation
Fig. 1 is conventional electricity storage preventing pond reversal connection circuit.
Fig. 2 is the anti-battery reversal connection of large electric current circuit.
Embodiment
As described in Figure 2, the anti-battery reversal connection of a kind of large electric current circuit, comprise resistance R 1, resistance R 2, resistance R 3, triode Q1, field effect transistor Q2, BAT+ end, BAT-end, the emitter e of described triode Q1 connects output cathode OUT+ and the BAT+ end of charger, the end 1 of base stage b contact resistance R1, the end 1 of collector electrode c contact resistance R3; The end 2 of described resistance R 1 connects drain D and the BAT-end of field effect transistor Q2; The end 2 of described resistance R 3 connects the grid G of field effect transistor Q2 and the end 2 of resistance R 2; The end 1 of source S contact resistance R2 of described field effect transistor Q2 and the output negative pole OUT-of charger.Under normal circumstances, the positive pole of BAT+ termination batteries, the negative pole of BAT-termination batteries.Triode Q1 flows through base current by R1, has collector current to flow through R3 to Q2 gate charges simultaneously, makes Q2 conducting.When the unexpected reversal connection of batteries, BAT-end has been received the positive pole of batteries, and BAT+ end has been received the negative pole of batteries.The anti-cut-off partially of Q1 base stage, can not be to the gate charges of Q2, and it is 0 that the gate source voltage of Q2 is discharged drop-down by R2, can not conducting.The batteries of reversal connection is blocked by Q2, can not be added to the output of DC power supply, thereby has avoided the generation of reversal connection short circuit accident.
In addition, due to the use in parallel easily of field effect transistor device, therefore for the anti-reverse function under arbitrarily large current conditions provides feasible scheme.
Claims (1)
1. the anti-battery reversal connection of a large electric current circuit, it is characterized in that: this circuit comprises resistance R 1, resistance R 2, resistance R 3, triode Q1, field effect transistor Q2, BAT+ end, BAT-end, the emitter e of described triode Q1 connects output cathode OUT+ and the BAT+ end of charger, one end of base stage b contact resistance R1, one end of collector electrode c contact resistance R3; The other end of described resistance R 1 connects drain D and the BAT-end of field effect transistor Q2; The other end of described resistance R 3 connects the grid G of field effect transistor Q2 and one end of resistance R 2; The other end of source S contact resistance R2 of described field effect transistor Q2 and the output negative pole OUT-of charger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320647970.1U CN203537008U (en) | 2013-10-21 | 2013-10-21 | Large current circuit of preventing battery reverse connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320647970.1U CN203537008U (en) | 2013-10-21 | 2013-10-21 | Large current circuit of preventing battery reverse connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203537008U true CN203537008U (en) | 2014-04-09 |
Family
ID=50423183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320647970.1U Expired - Fee Related CN203537008U (en) | 2013-10-21 | 2013-10-21 | Large current circuit of preventing battery reverse connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203537008U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099842A (en) * | 2016-08-17 | 2016-11-09 | 青海绿草地新能源科技有限公司 | A kind of reversal connection or short-circuit protection circuit |
| CN109167413A (en) * | 2018-10-11 | 2019-01-08 | 佛山职业技术学院 | A kind of anti-reverse and anti-back flow circuit of battery charging |
-
2013
- 2013-10-21 CN CN201320647970.1U patent/CN203537008U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099842A (en) * | 2016-08-17 | 2016-11-09 | 青海绿草地新能源科技有限公司 | A kind of reversal connection or short-circuit protection circuit |
| CN109167413A (en) * | 2018-10-11 | 2019-01-08 | 佛山职业技术学院 | A kind of anti-reverse and anti-back flow circuit of battery charging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20161021 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |