CN203951171U - reverse battery protection circuit - Google Patents
reverse battery protection circuit Download PDFInfo
- Publication number
- CN203951171U CN203951171U CN201420230835.1U CN201420230835U CN203951171U CN 203951171 U CN203951171 U CN 203951171U CN 201420230835 U CN201420230835 U CN 201420230835U CN 203951171 U CN203951171 U CN 203951171U
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- Prior art keywords
- resistance
- indc
- led
- raceway groove
- battery
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- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of reverse battery protection circuit; comprise inDC+, inDC-, R1, R2, R3, R4, LED, Q1, Q2, Out+, Out-and GND; wherein; R2 one end is connected with inDC+, Out+; the R2 other end connects the grid of R1 and Q2; an other end of R1 is received on the positive pole of LED; the negative pole of LED with the source electrode of inDC-, Q2, one end of the emitter of Q1, R4, GND be connected; the other end of R4 is connected with one end of the base stage of Q1, R3; the other end of R3 is connected with drain electrode, the Out-of Q2, and the grid of Q2 also connects with the collector electrode of Q1.Can not fill when electric at battery, use simple ocular estimate can judge failure cause, and occurring that reversal connection or circuit break down, and have indicator light Presentation Function.
Description
Technical field
The utility model relates to a kind of power circuit, particularly relates to a kind of circuit that can realize battery reverse connecting protection.
Background technology
The anti-protective circuit of battery of using now field effect transistor (metal-oxide-semiconductor) is all to use the circuit of P-channel field-effect transistor (PEFT) pipe, and battery does not fill when electric, and caused by inconvenient judgment is the problem of battery or the problem of charger itself.
When using common reversal connection protection function, can not point out very intuitively the whether reversal connection or battery damages of client's battery.
Summary of the invention
The purpose of this utility model is to provide a kind of reverse battery protection circuit, can not fill when electric at battery, uses simple ocular estimate can judge failure cause, and is occurring that reversal connection or circuit break down, and have indicator light Presentation Function.
For achieving the above object, the technical solution adopted in the utility model is:
Reverse battery protection circuit of the present utility model, comprises DC supply input inDC+, DC supply input inDC-, resistance R 1, resistance R 2, resistance R 3, resistance R 4, LED, NPN type triode Q1, N raceway groove isolated gate FET Q2, output Out+, output Out-and earth terminal GND, wherein, resistance R 2 one end and DC supply input inDC+, output Out+ is connected, the grid of resistance R 2 other end contact resistance R1 and N raceway groove isolated gate FET Q2, and an other end of resistance R 1 is received on the positive pole of LED, the negative pole of LED and DC supply input inDC-, the source electrode of N raceway groove isolated gate FET Q2, the emitter of NPN type triode Q1, one end of resistance R 4, earth terminal GND is connected, the base stage of the other end of resistance R 4 and NPN type triode Q1, one end of resistance R 3 connects, and the other end of resistance R 3 is connected with the drain electrode of N raceway groove isolated gate FET Q2, output Out-, the grid of N raceway groove isolated gate FET Q2 also connects with the collector electrode of NPN type triode Q1.
With above-mentioned prior art, compare, the reverse-connection protection circuit circuit that the utility model adopts N channel field-effect pipe to form, no matter whether access battery, field effect transistor is always in conducting state, output can be detected and whether have Voltage-output, install LED light additional, can save the control circuit of LED lamp, can not fill when electric and use simple ocular estimate can judge failure cause at battery; In protective circuit of the present utility model, LED light has been installed; when inserting charger, LED lamp is bright; charger no problem is described; LED lamp goes out; charger evil idea or socket loose contact are described, LED lamp flicker explanation charger is bad, access battery; when battery reversal connection, indicator light goes out, LED lamp flicker when battery damages.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is elaborated.
Embodiment 1, as shown in Figure 1, comprises DC supply input inDC+, DC supply input inDC-, resistance R 1, resistance R 2, resistance R 3, resistance R 4, LED, NPN type triode Q1, N raceway groove isolated gate FET Q2, output Out+, output Out-and earth terminal GND, wherein, resistance R 2 one end and DC supply input inDC+, output Out+ is connected, the grid of resistance R 2 other end contact resistance R1 and N raceway groove isolated gate FET Q2, and an other end of resistance R 1 is received on the positive pole of LED, the negative pole of LED and DC supply input inDC-, the source electrode of N raceway groove isolated gate FET Q2, the emitter of NPN type triode Q1, one end of resistance R 4, earth terminal GND is connected, the base stage of the other end of resistance R 4 and NPN type triode Q1, one end of resistance R 3 connects, and the other end of resistance R 3 is connected with the drain electrode of N raceway groove isolated gate FET Q2, output Out-, the grid of N raceway groove isolated gate FET Q2 also connects with the collector electrode of NPN type triode Q1.When battery connects inverse time, the positive pole that is battery is received on output Out-, the negative pole of battery is received output Out+, the voltage of the base stage of NPN type triode Q1 is greater than 0.7V after by resistance R 3 and resistance R 4 dividing potential drops, thereby make NPN type triode Q1 conducting, electric current will directly pass through resistance R 2 and NPN type triode Q1 to earth terminal GND, can not fill charger is counter, effectively avoided the damage to charger, at this moment after NPN type triode Q1 conducting, formed the short circuit to N raceway groove isolated gate FET Q2 circuit to LED, LED lamp goes out, prompting battery connects instead, thereby realize reversal connection protection function.
In the present embodiment, described resistance R 1, resistance R 2, resistance R 3 and resistance R 4 are all selected Chip-R, reduce costs, and have greatly improved economic benefit.
The reverse-connection protection circuit that P-channel field-effect transistor (PEFT) pipe forms, when not accessing battery, field effect transistor is always in cut-off state, so output can't detect voltage.If need to install LED light additional, just need to add the control circuit of a part to indicator light, just cost is increased.With above-mentioned prior art, compare, the reverse-connection protection circuit circuit that the utility model adopts N channel field-effect pipe to form, no matter whether access battery, field effect transistor is always in conducting state, output can be detected and whether have Voltage-output, install LED light additional, can save the control circuit of LED lamp, can not fill when electric and use simple ocular estimate can judge failure cause at battery; In protective circuit of the present utility model, LED light has been installed; when inserting charger, LED lamp is bright; charger no problem is described; LED lamp goes out; charger evil idea or socket loose contact are described, LED lamp flicker explanation charger is bad, access battery; when battery reversal connection, indicator light goes out, LED lamp flicker when battery damages.
Claims (2)
1. a reverse battery protection circuit, comprises DC supply input inDC+, DC supply input inDC-, resistance R 1, resistance R 2, resistance R 3, resistance R 4, LED, NPN type triode Q1, N raceway groove isolated gate FET Q2, output Out+, output Out-and earth terminal GND, wherein, resistance R 2 one end and DC supply input inDC+, output Out+ is connected, the grid of resistance R 2 other end contact resistance R1 and N raceway groove isolated gate FET Q2, and an other end of resistance R 1 is received on the positive pole of LED, the negative pole of LED and DC supply input inDC-, the source electrode of N raceway groove isolated gate FET Q2, the emitter of NPN type triode Q1, one end of resistance R 4, earth terminal GND is connected, the base stage of the other end of resistance R 4 and NPN type triode Q1, one end of resistance R 3 connects, and the other end of resistance R 3 is connected with the drain electrode of N raceway groove isolated gate FET Q2, output Out-, the grid of N raceway groove isolated gate FET Q2 also connects with the collector electrode of NPN type triode Q1.
2. a kind of reverse battery protection circuit according to claim 1, is characterized in that: described resistance R 1, resistance R 2, resistance R 3 and resistance R 4 are all Chip-Rs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420230835.1U CN203951171U (en) | 2014-05-07 | 2014-05-07 | reverse battery protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420230835.1U CN203951171U (en) | 2014-05-07 | 2014-05-07 | reverse battery protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203951171U true CN203951171U (en) | 2014-11-19 |
Family
ID=51893188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420230835.1U Expired - Fee Related CN203951171U (en) | 2014-05-07 | 2014-05-07 | reverse battery protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203951171U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130391A (en) * | 2016-08-11 | 2016-11-16 | 苏州迈力电器有限公司 | There is the power supply UPS sinewave inverter of reverse connecting protection |
| CN112798985A (en) * | 2019-10-28 | 2021-05-14 | 上海度普新能源科技有限公司 | Battery pack voltage line sequence detection circuit |
-
2014
- 2014-05-07 CN CN201420230835.1U patent/CN203951171U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130391A (en) * | 2016-08-11 | 2016-11-16 | 苏州迈力电器有限公司 | There is the power supply UPS sinewave inverter of reverse connecting protection |
| CN112798985A (en) * | 2019-10-28 | 2021-05-14 | 上海度普新能源科技有限公司 | Battery pack voltage line sequence detection circuit |
| CN112798985B (en) * | 2019-10-28 | 2022-07-26 | 上海度普新能源科技有限公司 | Battery pack voltage line sequence detection circuit |
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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: 20141119 Termination date: 20190507 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |