CN105743066A - Actively-disconnected vehicle-mounted storage battery protection circuit - Google Patents
Actively-disconnected vehicle-mounted storage battery protection circuit Download PDFInfo
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- CN105743066A CN105743066A CN201610177860.1A CN201610177860A CN105743066A CN 105743066 A CN105743066 A CN 105743066A CN 201610177860 A CN201610177860 A CN 201610177860A CN 105743066 A CN105743066 A CN 105743066A
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- resistance
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to an actively-disconnected vehicle-mounted storage battery protection circuit, belonging to the control of an automobile circuit control and solving the problem that the electrical quantity of a storage battery can be completely consumed due to long-term no running of an existing vehicle. The actively-disconnected vehicle-mounted storage battery protection circuit comprises a comparator A1, a P-channel metal oxide semiconductor (PMOS) transistor VT1, a negative-positive-negative (NPN) triode VT2, resistors R1 to R11 and a capacitor C1, wherein the storage battery is a DC power supply providing +24V, +24V is divided through the R1 and the R2 and then is connected with the same-phase input end of the A1, the inverse-phase input end of the A1 is connected with a +5V reference DC power supply through voltage division, the output end of the A1 is connected with a base of the VT2 through voltage division of +24V by the R6 and the R7, a collector of the VT2 is connected with one end of the R11, the other end of the R11 is connected with the +24V and a grid of the VT1 through the R9, and the drain of the VT1 is taken as an output end VIN of the battery protection battery.
Description
Technical field
The invention belongs to automobile circuit control field.
Background technology
Vehicle electronics value volume and range of product is being continuously increased, automobile stop time, the electricity of the continuous battery consumption of equipment in car.If vehicle does not travel (not having engine charging) for a long time, the accumulator electric-quantity of vehicle will be gradually lowered, until using up.Particularly in winter, the electricity that the more low accumulator of temperature preserves will reduce at double, and the use of vehicle-mounted electrical equipment is relatively bigger to the loss of accumulator.
Through investigation, product in the market is mainly by reducing oneself power consumption, reduce the loss to accumulator electric-quantity, the long-term vehicle not travelled still there will be the situation that battery electric quantity depletes, significantly reduce the service life of battery, and add the additional workload (when storage battery does not have electricity, needing storage battery bridging type to charge) of driver.
Summary of the invention
The invention aims to solve existing vehicle do not travel for a long time and there will be the problem that accumulator electric-quantity depletes, it is provided that a kind of actively breakaway-element Vehicular accumulator cell protection circuit.
Active breakaway-element Vehicular accumulator cell of the present invention protection circuit, it includes comparator A1, PMOS transistor VT1, NPN audion VT2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11 and electric capacity C1；
Accumulator is to provide the DC source of+24V, and the cathode power supply outfan of accumulator connects the source electrode of one end of resistance R1, one end of resistance R6, one end of resistance R9 and PMOS transistor VT1 respectively；
The other end of resistance R1 is simultaneously connected with one end of resistance R2 and the in-phase input end of comparator A1, and the inverting input of comparator A1 is simultaneously connected with one end of resistance R4 and one end of resistance R3, the other end ground connection of resistance R4；Another termination+5V benchmark DC source of resistance R3；Resistance R5 is bridged between in-phase input end and the outfan of comparator A1；The positive pole power supply terminal of comparator A1 connects+5V DC source, the negative pole power supply terminal ground connection of comparator A1；The outfan of comparator A1 is simultaneously connected with the other end of resistance R6 and one end of resistance R7；
The other end of resistance R7 is simultaneously connected with one end of resistance R8 and the base stage of NPN audion VT2, the other end ground connection of resistance R8；The grounded emitter of NPN audion VT2；The colelctor electrode of NPN audion VT2 connects one end of resistance R11, and the other end of resistance R11 is simultaneously connected with the other end of resistance R9 and the grid of PMOS transistor VT1；
The drain electrode of PMOS transistor VT1 is simultaneously connected with one end of resistance R10 and one end of electric capacity C1, and as battery protecting circuit outfan VIN；
The other end ground connection of electric capacity C1；The other end ground connection of resistance R10.
Advantages of the present invention: the present invention is a kind of with low cost, judging the secondary battery protection circuit that can actively disconnect when battery voltage is too low, it is to avoid vehicle does not travel for a long time and there will be the situation that accumulator electric-quantity depletes.Adopt Schmidt trigger mode of operation, regulate threshold voltage, close during lower than lower voltage limit (such as 17V), open when reaching upper voltage limit (such as 18V), it is to avoid frequently shake when threshold voltage is relatively low.
Accompanying drawing explanation
Fig. 1 is the physical circuit figure of active breakaway-element Vehicular accumulator cell of the present invention protection circuit.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described below in conjunction with Fig. 1; described in present embodiment, actively breakaway-element Vehicular accumulator cell protects circuit, and it includes comparator A1, PMOS transistor VT1, NPN audion VT2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11 and electric capacity C1；
Accumulator is to provide the DC source of+24V, and the cathode power supply outfan of accumulator connects the source electrode of one end of resistance R1, one end of resistance R6, one end of resistance R9 and PMOS transistor VT1 respectively；
The other end of resistance R1 is simultaneously connected with one end of resistance R2 and the in-phase input end of comparator A1, and the inverting input of comparator A1 is simultaneously connected with one end of resistance R4 and one end of resistance R3, the other end ground connection of resistance R4；Another termination+5V benchmark DC source of resistance R3；Resistance R5 is bridged between in-phase input end and the outfan of comparator A1；The positive pole power supply terminal of comparator A1 connects+5V DC source, the negative pole power supply terminal ground connection of comparator A1；The outfan of comparator A1 is simultaneously connected with the other end of resistance R6 and one end of resistance R7；
The other end of resistance R7 is simultaneously connected with one end of resistance R8 and the base stage of NPN audion VT2, the other end ground connection of resistance R8；The grounded emitter of NPN audion VT2；The colelctor electrode of NPN audion VT2 connects one end of resistance R11, and the other end of resistance R11 is simultaneously connected with the other end of resistance R9 and the grid of PMOS transistor VT1；
The drain electrode of PMOS transistor VT1 is simultaneously connected with one end of resistance R10 and one end of electric capacity C1, and as battery protecting circuit outfan VIN；
The other end ground connection of electric capacity C1；The other end ground connection of resistance R10.
Comparator A1 adopts model to be the comparator of LM2903D.
Workflow:
V+24 is battery tension, and this voltage, after R1, R2 dividing potential drop, compares with the anti-phase input terminal voltage of A1.Higher than then A1 output high level, on the contrary output low level.
The output end voltage of comparator A1 is when the outfan of R6, R7, R8 dividing potential drop rear drive audion VT2, A1 is output as high level, and VT2 turns on, otherwise VT2 closes.
During VT2 conducting, the pressure reduction between grid and the source electrode of VT1 increases, and VT1 turns on.Accumulator is energized, otherwise when VT2 closes, VT1 is not turned on.
Operation principle:
When accumulator output voltage is lower than 17V, A1 output low level, VT2 closes, and VT1 closes, and VIN does not export, thus reaching the effect of protection accumulator.
When battery tension is higher than 18V, A1 exports high level, and VT2 turns on, and VT1 opens, and VIN exports.
The effect of comparator A1 is Schmidt trigger, it is possible to regulate threshold voltage.Present embodiment design is closed when 17V, opens (threshold voltage 1V) during 18V, it is to avoid frequently shake when threshold voltage is relatively low.
Claims (2)
1. actively breakaway-element Vehicular accumulator cell protects circuit; it is characterized in that, it includes comparator A1, PMOS transistor VT1, NPN audion VT2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11 and electric capacity C1；
Accumulator is to provide the DC source of+24V, and the cathode power supply outfan of accumulator connects the source electrode of one end of resistance R1, one end of resistance R6, one end of resistance R9 and PMOS transistor VT1 respectively；
The other end of resistance R1 is simultaneously connected with one end of resistance R2 and the in-phase input end of comparator A1, and the inverting input of comparator A1 is simultaneously connected with one end of resistance R4 and one end of resistance R3, the other end ground connection of resistance R4；Another termination+5V benchmark DC source of resistance R3；Resistance R5 is bridged between in-phase input end and the outfan of comparator A1；The positive pole power supply terminal of comparator A1 connects+5V DC source, the negative pole power supply terminal ground connection of comparator A1；The outfan of comparator A1 is simultaneously connected with the other end of resistance R6 and one end of resistance R7；
The other end of resistance R7 is simultaneously connected with one end of resistance R8 and the base stage of NPN audion VT2, the other end ground connection of resistance R8；The grounded emitter of NPN audion VT2；The colelctor electrode of NPN audion VT2 connects one end of resistance R11, and the other end of resistance R11 is simultaneously connected with the other end of resistance R9 and the grid of PMOS transistor VT1；
The drain electrode of PMOS transistor VT1 is simultaneously connected with one end of resistance R10 and one end of electric capacity C1, and as battery protecting circuit outfan VIN；
The other end ground connection of electric capacity C1；The other end ground connection of resistance R10.
2. actively breakaway-element Vehicular accumulator cell protects circuit according to claim 1, it is characterised in that comparator A1 adopts model to be the comparator of LM2903D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610177860.1A CN105743066A (en) | 2016-03-24 | 2016-03-24 | Actively-disconnected vehicle-mounted storage battery protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610177860.1A CN105743066A (en) | 2016-03-24 | 2016-03-24 | Actively-disconnected vehicle-mounted storage battery protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105743066A true CN105743066A (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610177860.1A Pending CN105743066A (en) | 2016-03-24 | 2016-03-24 | Actively-disconnected vehicle-mounted storage battery protection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069937A (en) * | 2017-04-25 | 2017-08-18 | 航天科技控股集团股份有限公司 | Automatic change-over device of emergency |
| CN107387287A (en) * | 2017-08-01 | 2017-11-24 | 河南满守忠汽车配件有限公司 | A kind of automotive starter protection circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202340120U (en) * | 2011-12-08 | 2012-07-18 | 深圳市伊爱高新技术开发有限公司 | Automatic identification and protection circuit of vehicle power supply |
| CN203617694U (en) * | 2013-10-22 | 2014-05-28 | 徐州市恒源电器有限公司 | Lithium battery charging protection circuit |
| CN104218533A (en) * | 2014-10-09 | 2014-12-17 | 上海斐讯数据通信技术有限公司 | Power input overvoltage turn-off protection circuit |
| CN204761073U (en) * | 2015-06-09 | 2015-11-11 | 山东高唐融博新能源开发有限公司 | Solar energy is full of electrical shutoff control ware |
-
2016
- 2016-03-24 CN CN201610177860.1A patent/CN105743066A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202340120U (en) * | 2011-12-08 | 2012-07-18 | 深圳市伊爱高新技术开发有限公司 | Automatic identification and protection circuit of vehicle power supply |
| CN203617694U (en) * | 2013-10-22 | 2014-05-28 | 徐州市恒源电器有限公司 | Lithium battery charging protection circuit |
| CN104218533A (en) * | 2014-10-09 | 2014-12-17 | 上海斐讯数据通信技术有限公司 | Power input overvoltage turn-off protection circuit |
| CN204761073U (en) * | 2015-06-09 | 2015-11-11 | 山东高唐融博新能源开发有限公司 | Solar energy is full of electrical shutoff control ware |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069937A (en) * | 2017-04-25 | 2017-08-18 | 航天科技控股集团股份有限公司 | Automatic change-over device of emergency |
| CN107387287A (en) * | 2017-08-01 | 2017-11-24 | 河南满守忠汽车配件有限公司 | A kind of automotive starter protection circuit |
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Application publication date: 20160706 |