CN202050235U - Battery reverse-connection protection circuit and lamp - Google Patents
Battery reverse-connection protection circuit and lamp Download PDFInfo
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- CN202050235U CN202050235U CN 201120128215 CN201120128215U CN202050235U CN 202050235 U CN202050235 U CN 202050235U CN 201120128215 CN201120128215 CN 201120128215 CN 201120128215 U CN201120128215 U CN 201120128215U CN 202050235 U CN202050235 U CN 202050235U
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- type metal
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Abstract
The utility model is suitable for electronic field, and provides a battery reverse-connection protection circuit and a lamp. The battery reverse-connection circuit comprises a tow-way conductive switch element, a switch element, a fist battery terminal, a second battery terminal, a first load terminal, a second load terminal, a divider resistance R1 and a divider resistance R2. In the utility model, when a battery BT is in a charging state, the battery BT is reversely connected, the control end of the switch element reversely bias, the switch element can not be conductive, the potential of the control end of the two-way conductive switch element can not be pulled to be low, the tow-way conductive switch element can not be conductive, a charger can not charge the battery BT, and the battery BT is prevented from being damaged.
Description
Technical field
The utility model belongs to electronic applications, relates in particular to a kind of battery reverse-connection protection circuit and light fixture.
Background technology
Fig. 1 is existing a kind of reverse-connection protection circuit, and BT can be that battery can be other DC power supply also, and when BT was battery, this circuit just had limitation, and when battery BT powered to the load, the reverse connecting protection function of this circuit can normally be brought into play; If but load is changed into charger; charger can charge to battery BT; if battery has connect instead; charger will be to battery BT reverse charging so; like this, immediate current is excessive will to damage battery BT, that is to say; when battery BT was in charged state, the reverse connecting protection function of reverse-connection protection circuit will lose efficacy.
The utility model content
The purpose of this utility model is to provide a kind of battery reverse-connection protection circuit, is intended to solve present reverse-connection protection circuit when battery is in charged state, the problem that its reverse connecting protection function can lose efficacy.
The utility model is achieved in that a kind of battery reverse-connection protection circuit, connects load and battery respectively, and described battery reverse-connection protection circuit comprises:
Two-way admittance switch element, switch element, first battery terminal, second battery terminal, first face terminals, second face terminals, divider resistance R1 and divider resistance R2;
Described first battery terminal of first termination of described two-way admittance switch element, described first face terminals of second termination of described two-way admittance switch element, the hot end of the described switch element of control termination of described two-way admittance switch element, the cold end ground connection of described switch element, described divider resistance R1 is connected between the hot end of second end of described two-way admittance switch element and switch element, and described divider resistance R2 is connected between the control end of first end of described two-way admittance switch element and switch element.
In the said structure, described two-way admittance switch element adopts P type metal-oxide-semiconductor Q1, when described load is power device, the drain electrode of described P type metal-oxide-semiconductor Q1 is first end of described two-way admittance switch element, the source electrode of described P type metal-oxide-semiconductor Q1 is second end of described two-way admittance switch element, and the grid of described P type metal-oxide-semiconductor Q1 is the control end of described two-way admittance switch element.
In the said structure, described two-way admittance switch element adopts P type metal-oxide-semiconductor Q1, when described load is charger, the source electrode of described P type metal-oxide-semiconductor Q1 is first end of described two-way admittance switch element, the drain electrode of described P type metal-oxide-semiconductor Q1 is second end of described two-way admittance switch element, and the grid of described P type metal-oxide-semiconductor Q1 is the control end of described two-way admittance switch element.
In the said structure, described switch element adopts NPN type triode Q2, the hot end of the very described switch element of current collection of described NPN type triode Q2, the cold end of the very described switch element of emission of described NPN type triode Q2, the base stage of described NPN type triode Q2 is the control end of described switch element.
In the said structure, described switch element adopts P type metal-oxide-semiconductor Q3, the drain electrode of described P type metal-oxide-semiconductor Q3 is the hot end of described switch element, and the source electrode of described P type metal-oxide-semiconductor Q3 is the cold end of described switch element, and the grid of described P type metal-oxide-semiconductor Q3 is the control end of described switch element.
Another purpose of the present utility model is to provide a kind of light fixture, comprises a battery reverse-connection protection circuit, and described battery reverse-connection protection circuit connects load and battery respectively, and described battery reverse-connection protection circuit comprises:
Two-way admittance switch element, switch element, first battery terminal, second battery terminal, first face terminals, second face terminals, divider resistance R1 and divider resistance R2;
Described first battery terminal of first termination of described two-way admittance switch element, described first face terminals of second termination of described two-way admittance switch element, the hot end of the described switch element of control termination of described two-way admittance switch element, the cold end ground connection of described switch element, described divider resistance R1 is connected between the hot end of second end of described two-way admittance switch element and switch element, and described divider resistance R2 is connected between the control end of first end of described two-way admittance switch element and switch element.
In the said structure, described two-way admittance switch element adopts P type metal-oxide-semiconductor Q1, when described load is power device, the drain electrode of described P type metal-oxide-semiconductor Q1 is first end of described two-way admittance switch element, the source electrode of described P type metal-oxide-semiconductor Q1 is second end of described two-way admittance switch element, and the grid of described P type metal-oxide-semiconductor Q1 is the control end of described two-way admittance switch element.
In the said structure, described two-way admittance switch element adopts P type metal-oxide-semiconductor Q1, when described load is charger, the source electrode of described P type metal-oxide-semiconductor Q1 is first end of described two-way admittance switch element, the drain electrode of described P type metal-oxide-semiconductor Q1 is second end of described two-way admittance switch element, and the grid of described P type metal-oxide-semiconductor Q1 is the control end of described two-way admittance switch element.
In the said structure, described switch element adopts NPN type triode Q2, the hot end of the very described switch element of current collection of described NPN type triode Q2, the cold end of the very described switch element of emission of described NPN type triode Q2, the base stage of described NPN type triode Q2 is the control end of described switch element.
In the said structure, described switch element adopts P type metal-oxide-semiconductor Q3, the drain electrode of described P type metal-oxide-semiconductor Q3 is the hot end of described switch element, and the source electrode of described P type metal-oxide-semiconductor Q3 is the cold end of described switch element, and the grid of described P type metal-oxide-semiconductor Q3 is the control end of described switch element.
In the utility model, when battery BT is in charged state, battery BT is by reversal connection, the control end of switch element is anti-inclined to one side, switch element can conducting, and the current potential of the control end of two-way admittance switch element can not drag down, and the two-way admittance switch element can conducting, charger can't be given battery BT charging, and battery BT exempts from damage.
Description of drawings
Fig. 1 is the structure chart of existing battery reverse-connection protection circuit;
Fig. 2 is the structure chart of the battery reverse-connection protection circuit that provides of the utility model embodiment;
Fig. 3 is the structure chart of the battery reverse-connection protection circuit that provides of the utility model first embodiment;
Fig. 4 is the structure chart of the battery reverse-connection protection circuit that provides of the utility model second embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 2 shows the structure of the battery reverse-connection protection circuit that the utility model embodiment provides.
The battery reverse-connection protection circuit connects load 100 and battery BT respectively, and the battery reverse-connection protection circuit comprises:
Two-way admittance switch element 200, switch element 300, the first battery terminal A, the second battery terminal B, the first face terminals C, the second face terminals D, divider resistance R1 and divider resistance R2;
First termination, the first battery terminal A of two-way admittance switch element 200, second termination, the first face terminals C of two-way admittance switch element 200, the hot end of the control termination switch element 300 of two-way admittance switch element 200, the cold end ground connection of switch element 300, divider resistance R1 is connected between the hot end of second end of two-way admittance switch element 200 and switch element 300, and divider resistance R2 is connected between the control end of first end of two-way admittance switch element 200 and switch element 300.
Fig. 3 shows the structure of the battery reverse-connection protection circuit that the utility model first embodiment provides.
As the utility model one embodiment, two-way admittance switch element 200 adopts P type metal-oxide-semiconductor Q1, when load 100 is power device, the drain electrode of P type metal-oxide-semiconductor Q1 is first end of two-way admittance switch element 200, the source electrode of P type metal-oxide-semiconductor Q1 is second end of two-way admittance switch element 200, and the grid of P type metal-oxide-semiconductor Q1 is the control end of two-way admittance switch element 200.
As the utility model one embodiment, switch element 300 adopts NPN type triode Q2, the current collection of NPN type triode Q2 is the hot end of switch element 300 very, the emission of NPN type triode Q2 is the cold end of switch element 300 very, and the base stage of NPN type triode Q2 is the control end of switch element 300.
Fig. 4 shows the structure of the battery reverse-connection protection circuit that the utility model second embodiment provides.
As the utility model one embodiment, two-way admittance switch element 200 adopts P type metal-oxide-semiconductor Q1, when load 100 is charger, the source electrode of P type metal-oxide-semiconductor Q1 is first end of two-way admittance switch element 200, the drain electrode of P type metal-oxide-semiconductor Q1 is second end of two-way admittance switch element 200, and the grid of P type metal-oxide-semiconductor Q1 is the control end of two-way admittance switch element 200.
As the utility model one embodiment, switch element 300 adopts NPN type triode Q2, the current collection of NPN type triode Q2 is the hot end of switch element 300 very, the emission of NPN type triode Q2 is the cold end of switch element 300 very, and the base stage of NPN type triode Q2 is the control end of switch element 300.
As the utility model one embodiment, switch element 300 also can adopt P type metal-oxide-semiconductor Q3 (not shown), the drain electrode of P type metal-oxide-semiconductor Q3 is the hot end of switch element 300, the source electrode of P type metal-oxide-semiconductor Q3 is the cold end of switch element 300, and the grid of P type metal-oxide-semiconductor Q3 is the control end of switch element 300.
To adopt NPN type triode Q2 be example that the operation principle of battery reverse-connection protection circuit is described with switch element 300 below:
When battery BT powers to power device, NPN type triode Q2 base stage positively biased, the Q2 conducting of NPN type triode is also drawn the grid of P type metal-oxide-semiconductor Q1 and is low level, P type metal-oxide-semiconductor Q1 conducting, battery BT promptly gets through the current supply circuit of power device; When battery BT reversal connection; NPN type triode Q2 base stage is anti-inclined to one side; NPN type triode Q2 will be not can conducting; the grid potential of P type metal-oxide-semiconductor Q1 can not drag down yet so; P type metal-oxide-semiconductor Q1 can conducting; the body diode of P type metal-oxide-semiconductor Q1 also instead ends partially simultaneously, and entire circuit is in guard mode, and battery BT can't power to power device.
When charger charges to battery BT, when battery BT is just connecing, NPN type triode Q2 and P type metal-oxide-semiconductor Q1 also are conductings under battery BT effect, and charge circuit is connected, when battery BT reversal connection, NPN type triode Q2 base stage is anti-inclined to one side, NPN type triode Q2 will be not can conducting, the grid potential of P type metal-oxide-semiconductor Q1 can not drag down yet so, P type metal-oxide-semiconductor Q1 can conducting, charger just can not avoid battery BT to be damaged to battery BT charging yet.
The utility model embodiment also provides a kind of light fixture that comprises above-mentioned battery reverse-connection protection circuit.In the utility model, when battery BT is in charged state, battery BT is by reversal connection, the control end of switch element is anti-inclined to one side, switch element can conducting, and the current potential of the control end of two-way admittance switch element can not drag down, and the two-way admittance switch element can conducting, charger can't be given battery BT charging, and battery BT exempts from damage.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. a battery reverse-connection protection circuit connects load and battery respectively, it is characterized in that, described battery reverse-connection protection circuit comprises:
Two-way admittance switch element, switch element, first battery terminal, second battery terminal, first face terminals, second face terminals, divider resistance R1 and divider resistance R2;
Described first battery terminal of first termination of described two-way admittance switch element, described first face terminals of second termination of described two-way admittance switch element, the hot end of the described switch element of control termination of described two-way admittance switch element, the cold end ground connection of described switch element, described divider resistance R1 is connected between the hot end of second end of described two-way admittance switch element and switch element, and described divider resistance R2 is connected between the control end of first end of described two-way admittance switch element and switch element.
2. battery reverse-connection protection circuit as claimed in claim 1; it is characterized in that; described two-way admittance switch element adopts P type metal-oxide-semiconductor Q1; when described load is power device; the drain electrode of described P type metal-oxide-semiconductor Q1 is first end of described two-way admittance switch element; the source electrode of described P type metal-oxide-semiconductor Q1 is second end of described two-way admittance switch element, and the grid of described P type metal-oxide-semiconductor Q1 is the control end of described two-way admittance switch element.
3. battery reverse-connection protection circuit as claimed in claim 1; it is characterized in that; described two-way admittance switch element adopts P type metal-oxide-semiconductor Q1; when described load is charger; the source electrode of described P type metal-oxide-semiconductor Q1 is first end of described two-way admittance switch element; the drain electrode of described P type metal-oxide-semiconductor Q1 is second end of described two-way admittance switch element, and the grid of described P type metal-oxide-semiconductor Q1 is the control end of described two-way admittance switch element.
4. battery reverse-connection protection circuit as claimed in claim 1; it is characterized in that; described switch element adopts NPN type triode Q2; the hot end of the very described switch element of current collection of described NPN type triode Q2; the cold end of the very described switch element of emission of described NPN type triode Q2, the base stage of described NPN type triode Q2 is the control end of described switch element.
5. battery reverse-connection protection circuit as claimed in claim 1; it is characterized in that; described switch element adopts P type metal-oxide-semiconductor Q3; the drain electrode of described P type metal-oxide-semiconductor Q3 is the hot end of described switch element; the source electrode of described P type metal-oxide-semiconductor Q3 is the cold end of described switch element, and the grid of described P type metal-oxide-semiconductor Q3 is the control end of described switch element.
6. a light fixture comprises a battery reverse-connection protection circuit, and described battery reverse-connection protection circuit connects load and battery respectively, it is characterized in that, described battery reverse-connection protection circuit comprises:
Two-way admittance switch element, switch element, first battery terminal, second battery terminal, first face terminals, second face terminals, divider resistance R1 and divider resistance R2;
Described first battery terminal of first termination of described two-way admittance switch element, described first face terminals of second termination of described two-way admittance switch element, the hot end of the described switch element of control termination of described two-way admittance switch element, the cold end ground connection of described switch element, described divider resistance R1 is connected between the hot end of second end of described two-way admittance switch element and switch element, and described divider resistance R2 is connected between the control end of first end of described two-way admittance switch element and switch element.
7. light fixture as claimed in claim 6, it is characterized in that, described two-way admittance switch element adopts P type metal-oxide-semiconductor Q1, when described load is power device, the drain electrode of described P type metal-oxide-semiconductor Q1 is first end of described two-way admittance switch element, the source electrode of described P type metal-oxide-semiconductor Q1 is second end of described two-way admittance switch element, and the grid of described P type metal-oxide-semiconductor Q1 is the control end of described two-way admittance switch element.
8. light fixture as claimed in claim 6, it is characterized in that, described two-way admittance switch element adopts P type metal-oxide-semiconductor Q1, when described load is charger, the source electrode of described P type metal-oxide-semiconductor Q1 is first end of described two-way admittance switch element, the drain electrode of described P type metal-oxide-semiconductor Q1 is second end of described two-way admittance switch element, and the grid of described P type metal-oxide-semiconductor Q1 is the control end of described two-way admittance switch element.
9. light fixture as claimed in claim 6, it is characterized in that, described switch element adopts NPN type triode Q2, the hot end of the very described switch element of current collection of described NPN type triode Q2, the cold end of the very described switch element of emission of described NPN type triode Q2, the base stage of described NPN type triode Q2 is the control end of described switch element.
10. light fixture as claimed in claim 6, it is characterized in that, described switch element adopts P type metal-oxide-semiconductor Q3, the drain electrode of described P type metal-oxide-semiconductor Q3 is the hot end of described switch element, the source electrode of described P type metal-oxide-semiconductor Q3 is the cold end of described switch element, and the grid of described P type metal-oxide-semiconductor Q3 is the control end of described switch element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120128215 CN202050235U (en) | 2011-04-27 | 2011-04-27 | Battery reverse-connection protection circuit and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120128215 CN202050235U (en) | 2011-04-27 | 2011-04-27 | Battery reverse-connection protection circuit and lamp |
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| Publication Number | Publication Date |
|---|---|
| CN202050235U true CN202050235U (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201120128215 Expired - Fee Related CN202050235U (en) | 2011-04-27 | 2011-04-27 | Battery reverse-connection protection circuit and lamp |
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| CN (1) | CN202050235U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023116A (en) * | 2012-12-31 | 2013-04-03 | 惠州Tcl移动通信有限公司 | Mobile communication terminal and circuit used for protecting charging of mobile communication terminal |
| CN103457255A (en) * | 2012-05-31 | 2013-12-18 | 海洋王（东莞）照明科技有限公司 | Power supply reverse-connection-preventing circuit and lamp |
| CN103683264A (en) * | 2012-08-30 | 2014-03-26 | 深圳市海洋王照明工程有限公司 | Circuit for preventing reverse plug in of direct current power supply and lamp |
| CN104092259A (en) * | 2014-07-11 | 2014-10-08 | 常州华达科捷光电仪器有限公司 | Charging protection circuit used for rechargeable battery |
| CN108063437A (en) * | 2017-12-28 | 2018-05-22 | 广州爱易学智能信息科技有限公司 | The short-circuit protection circuit of classroom blackboard LED light strip |
| CN113359063A (en) * | 2021-06-09 | 2021-09-07 | 赛卓电子科技（上海）有限公司 | Open circuit detection circuit with reverse protection |
-
2011
- 2011-04-27 CN CN 201120128215 patent/CN202050235U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457255A (en) * | 2012-05-31 | 2013-12-18 | 海洋王（东莞）照明科技有限公司 | Power supply reverse-connection-preventing circuit and lamp |
| CN103457255B (en) * | 2012-05-31 | 2018-01-23 | 海洋王（东莞）照明科技有限公司 | A kind of circuit for preventing reverse connection of power supply and light fixture |
| CN103683264A (en) * | 2012-08-30 | 2014-03-26 | 深圳市海洋王照明工程有限公司 | Circuit for preventing reverse plug in of direct current power supply and lamp |
| CN103683264B (en) * | 2012-08-30 | 2017-10-13 | 深圳市海洋王照明工程有限公司 | A kind of anti-reverse connection circuit of direct current power supply and light fixture |
| CN103023116A (en) * | 2012-12-31 | 2013-04-03 | 惠州Tcl移动通信有限公司 | Mobile communication terminal and circuit used for protecting charging of mobile communication terminal |
| CN103023116B (en) * | 2012-12-31 | 2015-06-10 | 惠州Tcl移动通信有限公司 | Mobile communication terminal and circuit used for protecting charging of mobile communication terminal |
| CN104092259A (en) * | 2014-07-11 | 2014-10-08 | 常州华达科捷光电仪器有限公司 | Charging protection circuit used for rechargeable battery |
| CN104092259B (en) * | 2014-07-11 | 2016-06-22 | 常州华达科捷光电仪器有限公司 | A kind of charge protector for rechargeable battery |
| CN108063437A (en) * | 2017-12-28 | 2018-05-22 | 广州爱易学智能信息科技有限公司 | The short-circuit protection circuit of classroom blackboard LED light strip |
| CN113359063A (en) * | 2021-06-09 | 2021-09-07 | 赛卓电子科技（上海）有限公司 | Open circuit detection circuit with reverse protection |
| CN113359063B (en) * | 2021-06-09 | 2024-04-12 | 赛卓电子科技(上海)股份有限公司 | Open circuit detection circuit with reverse connection protection |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20190427 |