CN204978506U - Stable car power supply system - Google Patents

Stable car power supply system Download PDF

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Publication number
CN204978506U
CN204978506U CN201520581555.XU CN201520581555U CN204978506U CN 204978506 U CN204978506 U CN 204978506U CN 201520581555 U CN201520581555 U CN 201520581555U CN 204978506 U CN204978506 U CN 204978506U
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circuit
storage battery
aerotron
pole
charge
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Inventor
朱亮华
李贵
裴祖刚
王刚
黄勇
李政伦
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DONGGUAN CITY JUDA ELECTRONIC Co Ltd
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DONGGUAN CITY JUDA ELECTRONIC Co Ltd
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Abstract

The utility model discloses a stable car power supply system, its including a plurality of batteries, CPU, charging management module, the management module and the interface that charges discharge, wherein, the charge management circuit and the interface connection that charges for to storage battery charging, with CPU signal connection, CPU is given to the electric current size signal transmission that will charge to receive CPU's control signal, it is right a plurality of batteries carry out equalizing charge, management circuit and CPU signal connection discharge, its input with a plurality of batteries are connected, and the output is connected with the vary voltage circuit, through vary voltage circuit external output. The utility model discloses give car charge battery easy and simple to handle, well just stability is high for the security performance.

Description

A kind of stable automobile power system
Technical field
The utility model relates to power technique fields, specifically, relates to a kind of stable automobile power system.
Background technology
Along with social development, automobile more and more becomes requisite instrument in people's daily life, but the phenomenon causing automobile normally to start due to reasons such as storage battery power shortage, cold weathers, also annoying the personnel that more and more drive.Incity vehicle can on-call maintenance company be rescued, but needs the time cost paying long wait; And the people of travel enthusiasts and remote districts, run into such accident in the wild with rural area and then feel simply helpless.Car emergency starts power supply and occurs to solve automobile and cannot normally starting.At present; more existing car emergency starts the technical scheme of power supply; generally all being overlapped on the both positive and negative polarity of automobile storage battery by taking electric wire, emergency starting being carried out to automobile, during its work, directly starts automobile without any circuit protection system; discharge current is at 200A to 570A; thus cause automobile heavy-current discharge, there is potential safety hazard, and this to take electric mode comparatively complicated; for a lot of driver, there is operation easier.
Also there are some car emergencies to start power technology scheme, start automobile by the mode of supplementing electricity to automobile storage battery, but the stable output of electric current and voltage during its work, can not be ensured, thus enough electricity cannot be provided to start automobile.
Summary of the invention
The utility model provides a kind of stable automobile power system, starts the low and problem of job insecurity of power technology scheme complicated operation, safety performance, provide a kind of automobile power system of working stability to solve the car emergency that exists in prior art.
A stable automobile power system, comprising:
Multiple storage battery;
CPU;
Charging inlet;
Charge management circuit, it is connected with charging inlet, for battery charge; Be connected with cpu signal, by the size of current signal transmission of charging to CPU, and receive the control signal of CPU, equalizing charge is carried out to described multiple storage battery;
Discharging management circuit, is connected with cpu signal; Its input end is connected with described multiple storage battery, and mouth is connected with transforming circuit, is externally exported by transforming circuit.
The technical program is compared with existing charge system, stable equalizing charge, electric discharge can be carried out to storage battery, avoid different due to individuality of the storage battery of serial or parallel connection, when charge or discharge, occur that voltage is different, carry out discharge and recharge between storage battery and storage battery, thus cause battery operated instability, externally export unstable situation.The technical program is when carrying out different storage batterys from charging, electric discharge, and when being first full of or over-discharge situation appears in certain accumulator body, charge management circuit, discharging management circuit will carry out short circuit or closedown to individuality, stop its charge or discharge.
Further, described charge management circuit comprises charge circuit and charging balanced circuit, the input end of charge circuit is electrically connected with charging inlet, and the control end of charge circuit is connected with cpu signal, the mouth of charge circuit is electrically connected with charging balanced circuit, described charging balanced circuit comprises the equalizer circuit be connected in parallel with storage battery, and when the voltage of storage battery does not reach predetermined value, equalizer circuit is in open circuit; When the voltage of storage battery reaches predetermined value, equalizer circuit is by storage battery short circuit.
Here charge circuit can be general charge circuit, by detecting the magnitude of current of power supply, to electric power incoming line constant current or constant-voltage charge.The storage battery of equalizer circuit to individuality is monitored, and when the predetermined value (as 4.2V) that certain accumulator body arrives first, equalizer circuit becomes path by open circuit, and by storage battery short circuit.Thus avoid this accumulator body to occur the situation of other battery charges.
Further, described equalizer circuit comprises: PNP triode, TL431 and bleeder circuit; Bleeder circuit is in parallel with storage battery, bleeder circuit is provided with the first coupling end, middle coupling end and the second coupling end, first coupling end of bleeder circuit is connected with the emitter of PNP triode, the emitter of PNP triode is connected with the base stage of PNP triode by bias resistor, the base stage of PNP triode is connected with the mouth of TL431, the reference edge of TL431 is connected with the middle coupling end of bleeder circuit, the input end of TL431 is connected with the second coupling end of bleeder circuit, and the collecting electrode of PNP triode is connected with the second coupling end of bleeder circuit by output resistance.
Bleeder circuit provides a VREF (Voltage Reference) for TL431, when the voltage of storage battery arrives predetermined value, the reference voltage terminal of TL431 arrives 2.5V, TL431 forms path, TL431 and bias resistor form bleeder circuit, and the base tension of PNP triode reaches lowest starting voltage, and the collecting electrode of PNP triode and emitter form path, here PNP triode is equivalent to a switching valve, and metal-oxide-semiconductor can be adopted to substitute.
Further, charge circuit comprises current detection circuit and Circuit tuning, current detection circuit comprises aerotron Q1, the base stage of aerotron Q1 is connected with the input end of charge circuit by resistance R4, the base stage of aerotron Q1 is by resistance R3 ground connection, the grounded emitter of aerotron Q1, the collecting electrode of aerotron Q1 is to CPU transmission level signal, Circuit tuning comprises aerotron Q2, aerotron Q3, aerotron Q4 and field effect transistor Q5, the base stage of aerotron Q2 receives the control signal of CPU by resistance R5, the base stage of aerotron Q2 is by resistance R6 ground connection, the grounded emitter of aerotron Q2, the collecting electrode of aerotron Q2 is connected with the base stage of the Q3 of aerotron by resistance R7, the base stage of aerotron Q3 is connected with the input end of Circuit tuning by resistance R8, the base stage of aerotron Q4 is connected with the base stage of aerotron Q3, the grounded collector of aerotron Q3, the emitter of aerotron Q3 is connected with the emitter of aerotron Q4, the collecting electrode of aerotron Q4 is connected with the input end of Circuit tuning, the emitter of aerotron Q4 is connected with the input end of Circuit tuning by resistance R9, the emitter of aerotron Q4 is connected with the G pole of field effect transistor Q5 by resistance R10, the S pole of field effect transistor Q5 is connected with the input end of Circuit tuning, the D pole of field effect transistor Q5 is connected with the mouth of Circuit tuning.
Resistance R5, R6 form bleeder circuit, and control CPU is to the base stage output voltage of aerotron Q2; The collecting electrode output voltage of aerotron Q2 is the base tension of aerotron Q4, Q3, and wherein, aerotron Q3 is positive-negative-positive, and aerotron Q2, aerotron Q4 are NPN type; The G pole tension of Q3, Q4 co-controlling field effect transistor Q5, and then reach the voltage or electric current that control to export.
Further, charge circuit also comprises filter circuit, and Circuit tuning is connected with filter circuit, and filter circuit externally exports.
Wherein, described storage battery is Li-ion batteries piles or bank of super capacitors, and operating voltage range is 9.0V ~ 12.6V, and capacity is 3Ah ~ 7Ah.
Described charging inlet comprises mains electricity input end mouth and automobile power source input port.By this setting, two kinds of methods can be used to the power source charges of this stable automobile power system, one is commercial power charged by private adapter connection alternating current 220V, and another kind is then use automobile power source input port (cigarette lighter outlet) to be charged by an electric connection line.
Further, the access voltage of described mains electricity input end mouth and automobile power source input port is all not less than 12.6V, and charge mode is constant current-constant voltage mode.
Described electric discharge output port comprises 15VDC output port and 5VUSB output port.By this setting, the utility model can be made to have multiple electricity output function, the cigarette lighter outlet that 15VDC output port connects automobile by electric connection line charges to automobile storage battery, and 5VUSB output port is applicable to the charging of the moving multimedia equipment of all kinds of 5V.
Further, described transforming circuit comprises booster circuit and reduction voltage circuit.
Further, described electric discharge administration module is connected with 15VDC output port by booster circuit, is connected with 5VUSB output port by reduction voltage circuit.The electric discharge output port that is arranged so that of booster circuit and reduction voltage circuit can constant pressure and flow electric discharge, thus ensure that the stability of automobile power system work.
Described 15VDC output port connects the cigarette lighter outlet of automobile power source, and output current scope is 3A ~ 15A.
Preferably, described 15VDC output port outgoing current is 7A.
Described microprocessor is also connected with a button.This button is responsible for the switch of whole power circuit and the function of output voltage switching.
Further, also protective circuit is comprised.Protective circuit is for the protection of the overcurrent of battery, overvoltage, over.
Protective circuit comprises protect IC, protect IC model is S8254, protective circuit comprises testing circuit, the input end of testing circuit is connected with the positive pole of each storage battery, the mouth of testing circuit is connected with the induction end signal of protect IC, and described multiple storage battery is connected in series formation battery pack; Protective circuit also comprises the metal-oxide-semiconductor Q17 and metal-oxide-semiconductor Q16 that are connected in series with storage battery; The S pole of metal-oxide-semiconductor Q16 is connected with the signal end of protective circuit; the D pole of metal-oxide-semiconductor Q16 is connected with the D pole of metal-oxide-semiconductor Q17; the S pole of metal-oxide-semiconductor Q17 is connected with the positive pole of battery pack, and DOP control end, the COP control end of protect IC are connected with the G pole of metal-oxide-semiconductor Q17, the G pole of metal-oxide-semiconductor Q17 respectively.
Testing circuit comprises detection resistance, and protect IC is connected with the positive pole of each storage battery by detecting resistance.
Further, CPU is connected with button and read-out.
Further, discharging management circuit comprises the electric discharge managing chip matched with storage battery, and chip-shaped number of electric discharge management is S-8209A; The vdd terminal mouth of electric discharge managing chip is connected with the positive pole of corresponding storage battery by resistance, and the electric discharge VSS port of managing chip connects with the negative pole of corresponding storage battery; Also comprise the field effect transister matched with storage battery, the G pole of field effect transister is connected with the CB port of electric discharge managing chip, and the D pole of field effect transister connects with the negative pole of corresponding storage battery; The S pole of field effect transister is connected with the positive pole of corresponding storage battery by resistance.
Electric discharge managing chip detects the voltage of storage battery by vdd terminal mouth, when being in over-discharge state, CB port exports high level, and field effect transistor, by storage battery short circuit, avoids overdischarge.
Again further, in adjacent two electric discharge managing chips, along discharge current direction, the electric discharge managing chip corresponding with front storage battery is front electric discharge managing chip, the electric discharge managing chip corresponding with rear storage battery is rear electric discharge managing chip, and the negative pole of front storage battery is connected with the positive pole of rear storage battery; As in Fig. 7, CELL1 is front storage battery, and CELL2 is rear storage battery; The DO port of rear electric discharge managing chip, CO port are connected respectively by the CTLD port of resistance and front electric discharge managing chip, CTLC port.
Forward and backward electric discharge management chip signal connects, for regulating the discharge regime of each storage battery.
Advantageous Effects of the present utility model is: be connected by an electric connection line can charge to automobile storage battery with automobile cigarette lighter socket, easy and simple to handle; Storage battery and automobile storage battery can be made from excess current and superpotential harm by arranging of over module, additives for overcharge protection module, balanced discharge circuit and equalization charging circuit; it also avoid each cell of storage battery or supercapacitive cell overcharges and the phenomenon of over discharge simultaneously, improve the safety of whole process of charging.In addition, mouth of the present utility model is also provided with booster circuit and reduction voltage circuit, guarantees that constant pressure and flow discharges, and improves the stability of automobile power system work.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the automobile power system that embodiment is stable.
Fig. 2 is the charge circuit of embodiment.
Fig. 3 is the equalizer circuit of embodiment.
Fig. 4 is the protective circuit of embodiment.
Fig. 5 is the booster circuit of embodiment.
Fig. 6 is the reduction voltage circuit of embodiment.
Fig. 7 is the discharging management circuit of embodiment.
Reference numeral:
1---current detection circuit
2---Circuit tuning
3---filter circuit.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only for explaining the utility model, the restriction to the concrete protection domain of the utility model can not be interpreted as.
As shown in Figure 1, the utility model embodiment provides a kind of stable automobile power system, comprises CUP, charge management circuit, storage battery, discharging management circuit and transforming circuit.
Charging current, discharge current, charging valtage, sparking voltage in whole Circuits System in microprocessor management and control.In the specific implementation, storage battery adopts lithium cell group.Its specific works principle is the threshold value of preserving the discharge and recharge that lithium cell group is normally worked in microprocessor; and the voltage, the current value that gather in lithium cell group charge and discharge process; once the signal collected exceedes the threshold value of preserving in microprocessor; instruction will be sent immediately, cut off electric current to protect whole Circuits System.
Wherein, described charge management circuit comprises charge circuit (see Fig. 2) and charging balanced circuit (see Fig. 3), the input end of charge circuit is connected with charging inlet electricity J1, and the control end of charge circuit is connected with cpu signal, the mouth of charge circuit is electrically connected with charging balanced circuit, described charging balanced circuit comprises the equalizer circuit (see Fig. 3 dotted portion) be connected in parallel with storage battery, and when the voltage of storage battery does not reach predetermined value, equalizer circuit is in open circuit; When the voltage of storage battery reaches predetermined value, equalizer circuit is by storage battery short circuit.
Here charge circuit can be general charge circuit, by detecting the magnitude of current of power supply, to electric power incoming line constant current or constant-voltage charge.The storage battery of equalizer circuit to individuality is monitored, and when the predetermined value (as 4.2V) that certain accumulator body arrives first, equalizer circuit becomes path by open circuit, and by storage battery short circuit.Thus avoid this accumulator body to occur the situation of other battery charges.
Further, see Fig. 3 dotted portion, described equalizer circuit comprises: PNP triode, TL431 and bleeder circuit; Bleeder circuit is in parallel with storage battery, bleeder circuit is provided with the first coupling end, middle coupling end and the second coupling end, first coupling end of bleeder circuit is connected with the emitter of PNP triode, the emitter of PNP triode is connected with the base stage of PNP triode by bias resistor, the base stage of PNP triode is connected with the mouth of TL431, the reference edge of TL431 is connected with the middle coupling end of bleeder circuit, the input end of TL431 is connected with the second coupling end of bleeder circuit, and the collecting electrode of PNP triode is connected with the second coupling end of bleeder circuit by diode.
Bleeder circuit provides a VREF (Voltage Reference) for TL431, when the voltage of storage battery arrives predetermined value, the reference voltage terminal of TL431 arrives 2.5V, TL431 forms path, TL431 and bias resistor form bleeder circuit, and the base tension of PNP triode reaches lowest starting voltage, and the collecting electrode of PNP triode and emitter form path, here PNP triode is equivalent to a switching valve, and metal-oxide-semiconductor can be adopted to substitute.
Further, see Fig. 2, charge circuit comprises current detection circuit 1 and Circuit tuning 2, current detection circuit 1 comprises aerotron Q1, the base stage of aerotron Q1 is connected with the input end of charge circuit by resistance R4, the base stage of aerotron Q1 passes through resistance R3 ground connection, the grounded emitter of aerotron Q1, and the collecting electrode of aerotron Q1 is to CPU transmission level signal, Circuit tuning 2 comprises aerotron Q2, aerotron Q3, aerotron Q4 and field effect transistor Q5, the base stage of aerotron Q2 receives the control signal of CPU by resistance R5, the base stage of aerotron Q2 is by resistance R6 ground connection, the grounded emitter of aerotron Q2, the collecting electrode of aerotron Q2 is connected with the base stage of the Q3 of aerotron by resistance R7, the base stage of aerotron Q3 is connected with the input end of Circuit tuning 2 by resistance R8, the base stage of aerotron Q4 is connected with the base stage of aerotron Q3, the grounded collector of aerotron Q3, the emitter of aerotron Q3 is connected with the emitter of aerotron Q4, the collecting electrode of aerotron Q4 is connected with the input end of Circuit tuning 2, the emitter of aerotron Q4 is connected with the input end of Circuit tuning 2 by resistance R9, the emitter of aerotron Q4 is connected with the G pole of field effect transistor Q5 by resistance R10, the S pole of field effect transistor Q5 is connected with the input end of Circuit tuning 2, the D pole of field effect transistor Q5 is connected with the mouth of Circuit tuning 2.
Resistance R5, R6 form bleeder circuit, and control CPU is to the base stage output voltage of aerotron Q2; The collecting electrode output voltage of aerotron Q2 is the base tension of aerotron Q4, Q3, and wherein, aerotron Q3 is positive-negative-positive, and aerotron Q2, aerotron Q4 are NPN type; The G pole tension of aerotron Q3, aerotron Q4 co-controlling field effect transistor Q5, and then reach the voltage or electric current that control to export.
Further, charge circuit also comprises filter circuit 3, and Circuit tuning 2 is connected with filter circuit 3, and filter circuit 3 externally exports.
In addition, microprocessor is also connected with button and read-out, and button is responsible for the switch of whole power circuit and the function of output voltage switching by microprocessor.Its specific works principle is, first time pushes button, and power circuit is connected, and connects 5VUSB output port; Long by once, switch to and connect 15VDC output port; Press once, power circuit cuts out again.
Charging inlet can connect automobile power source, can start power source charges, but all need to be depressurized to more than 12.6V during charging for car emergency.
Be provided with equalization charging circuit in charge management module, thus there is each cell batteries equalizing charge function to storage battery.Be provided with balanced discharge circuit in electric discharge administration module, thus there is each cell batteries balanced discharge function to storage battery.The setting of equalization charging circuit and balanced discharge circuit ensure that each cell batteries in storage battery can be full of safely and safe-discharge, avoid certain monomer to overcharge and the phenomenon of over discharge, thus improve safety and the service life of whole power supply.
Further, also protective circuit is comprised.Protective circuit is for the protection of the overcurrent of battery, overvoltage, over.
See Fig. 4, protective circuit can protect storage battery harm from too high voltages, super-high-current when charging, and its principle of work is when running into too high voltages, super-high-current, during short circuit, transmit a signal to microprocessor immediately, and close down process of charging by the instruction of microprocessor; Protective circuit also can to protect storage battery when discharging from low pressure, super-high-current; the harm of short circuit; its principle of work is that when running into low voltage, super-high-current, short circuit transmits a signal to microprocessor immediately, and closes down discharge process by the instruction of microprocessor.The setting of protective circuit avoids because of excess current and too high voltages and crosses low voltage, short circuit, the dire consequences such as the blast on fire caused.
Protective circuit comprises protect IC, protect IC model is S8254, protective circuit comprises testing circuit, the input end of testing circuit is connected with the positive pole of each storage battery, the mouth of testing circuit is connected with induction end (V1, V2, V3 hold) signal of protect IC, and described multiple storage battery is connected in series formation battery pack; Protective circuit also comprises the metal-oxide-semiconductor Q17 and metal-oxide-semiconductor Q16 that are connected in series with storage battery; The S pole of metal-oxide-semiconductor Q16 is connected with the signal end of protective circuit; the D pole of metal-oxide-semiconductor Q16 is connected with the D pole of metal-oxide-semiconductor Q17; the S pole of metal-oxide-semiconductor Q17 is connected with the positive pole of battery pack, and DOP control end, the COP control end of protect IC are connected with the G pole of metal-oxide-semiconductor Q17, the G pole of metal-oxide-semiconductor Q16 respectively.
Testing circuit comprises detection resistance, and protect IC is connected with the positive pole of each storage battery by detecting resistance.
Overcurrent protection (see Fig. 4): when discharge stream is larger than certain value, this state also maintains more than certain hour, then enter overcurrent condition.The control end voltage of the DOP of protect IC becomes VDD level, and metal-oxide-semiconductor Q17 becomes OFF.And stopping electric discharge, the COP control end of protect IC becomes high resistance, because the current potential of P+ terminal (i.e. the signal end of protective circuit) is pulled up, causes charging metal-oxide-semiconductor Q16 to become OFF.The VMP terminal of protect IC is pulled to VDD by internal resistance.
Overvoltage protection (Fig. 4): when the voltage ratio certain value height of certain battery, when this state maintains more than certain hour, the COP control end of protect IC becomes high resistance.The COP control end of protect IC is the cause of P+ by outer meeting resistance pull-up, and charging metal-oxide-semiconductor Q16 becomes OFF, and stops charging.
Over (Fig. 4): when the voltage ratio certain value of certain battery is low, this state when maintaining more than certain hour, the voltage of the DOP control end of protect IC becomes VDD, electric discharge metal-oxide-semiconductor Q17 becomes OFF, and stops electric discharge.
When needs are to emergency starting power source charges, automobile power source input port can be used, the access voltage of charging input end mouth is all not less than 12.6V, charge mode is constant current-constant voltage mode, namely first according to the electric current constant-current charge of 1A ~ 4A, when voltage reaches 12.6V, transfer constant-voltage charge to, until stop charging when electric current is reduced to 0.2A.
Further as shown in Figure 7, discharging management circuit comprises the electric discharge managing chip matched with storage battery, and chip-shaped number of electric discharge management is S-8209A; The vdd terminal mouth of electric discharge managing chip is connected with the positive pole of corresponding storage battery by resistance, and the electric discharge VSS port of managing chip connects with the negative pole of corresponding storage battery; Also comprise the field effect transister matched with storage battery, the G pole of field effect transister is connected with the CB port of electric discharge managing chip, and the D pole of field effect transister connects with the negative pole of corresponding storage battery; The S pole of field effect transister is connected with the positive pole of corresponding storage battery by resistance.
Electric discharge managing chip detects the voltage of storage battery by vdd terminal mouth, when being in over-discharge state, CB port exports high level, and field effect transistor, by storage battery short circuit, avoids overdischarge.
Again further, in adjacent two electric discharge managing chips, along discharge current direction, the electric discharge managing chip corresponding with front storage battery is front electric discharge managing chip, the electric discharge managing chip corresponding with rear storage battery is rear electric discharge managing chip, as in Fig. 7, CELL1 is front storage battery, and CELL2 is rear storage battery; The DO port of rear electric discharge managing chip, CO port are connected respectively by the CTLD port of resistance and front electric discharge managing chip, CTLC port.
Forward and backward electric discharge management chip signal connects, for regulating the discharge regime of each storage battery.
When discharging, carry out balanced management, as shown in Figure 7.
Balancing principle (Fig. 7): when battery is in over-discharge state, CELL3 is less than certain voltage value, and maintain more than a period of time, illustrate that CELL3 becomes over-discharge state, then, by DO3 terminal-CTLD2 terminal, CELL2 also can become over-discharge state, if at this moment CELL2 voltage is higher than certain value, CELL2 can make electric quantity balancing control to become ' ON '; Then, by DO terminal-CTLD1 terminal, CELL1 also can become over-discharge state.Equally, if CELL1, higher than certain value, can make electric quantity balancing control to become " ON ".
Transforming circuit comprises booster circuit (see Fig. 5) and reduction voltage circuit (see Fig. 6).
When needs externally charge, transformation can be carried out by transforming circuit to the output voltage of storage battery, then export.When charging to automobile storage battery as used emergency starting power supply, the 15VDC output port of emergency starting power supply is connected with automobile cigarette lighter socket by an electric connection line, electricity is supplemented by giving automobile storage battery constant-current charge, to reach the object starting automobile, charging current, between 3A ~ 10A, is preferably 5A.This output branch road is provided with booster circuit to guarantee constant-current discharge, thus ensures that automobile can emergency starting timely.This charging modes operation is very simple, need not use the electrical terminal of specialty, more without the need to the automobile knowledge of specialty.
The principle of work that DC15V exports: when access cell load, open equipment, U2 starts working, and cell pressure is boosted to 15V, and then through MOS and inductance, by the pwm signal controlled hypotension of CPU, constant current charges the battery.
The principle of work that DC5V exports: when USB accesses load transients, LDT is dragged down, and CPU reads this signal, just opens U1 and 8205MOS, starts working, and cell pressure is through U1 reduced output voltage constant voltage 5V; When load is excessive, the electric current flowing through R48 also strains large mutually, and CPU reads the current value flowing through R48 in real time by R47, reach certain value when flowing through electric current, and maintain more than certain hour, CPU just closes U1 and 8205MOS, stops exporting.
When needs use emergency starting power supply to charge to the digital electrical apparatus such as mobile phone, iPad, above-mentioned digital product is connected directly to 5VUSB output port, this output branch road is provided with reduction voltage circuit to guarantee constant voltage discharge.
Below be only the preferred embodiment of the application, equivalent technical solutions on this basis still falls into application protection domain.

Claims (9)

1. a stable automobile power system, is characterized in that: comprising:
Multiple storage battery;
CPU;
Charging inlet;
Charge management circuit, it is connected with charging inlet, for battery charge; Be connected with cpu signal, by the size of current signal transmission of charging to CPU, and receive the control signal of CPU, equalizing charge is carried out to described multiple storage battery;
Discharging management circuit, is connected with cpu signal; Its input end is connected with described multiple storage battery, and mouth is connected with transforming circuit, is externally exported by transforming circuit.
2. a kind of stable automobile power system according to claim 1, it is characterized in that: described charge management circuit comprises charge circuit and charging balanced circuit, the input end of charge circuit is electrically connected with charging inlet, and the control end of charge circuit is connected with cpu signal, the mouth of charge circuit is electrically connected with charging balanced circuit, described charging balanced circuit comprises the equalizer circuit be connected in parallel with storage battery, and when the voltage of storage battery does not reach predetermined value, equalizer circuit is in open circuit; When the voltage of storage battery reaches predetermined value, equalizer circuit is by storage battery short circuit.
3. a kind of stable automobile power system according to claim 2, is characterized in that: described equalizer circuit comprises: PNP triode, TL431 and bleeder circuit; Bleeder circuit is in parallel with storage battery, bleeder circuit is provided with the first coupling end, middle coupling end and the second coupling end, first coupling end of bleeder circuit is connected with the emitter of PNP triode, the emitter of PNP triode is connected with the base stage of PNP triode by bias resistor, the base stage of PNP triode is connected with the mouth of TL431, the reference edge of TL431 is connected with the middle coupling end of bleeder circuit, the input end of TL431 is connected with the second coupling end of bleeder circuit, and the collecting electrode of PNP triode is connected with the second coupling end of bleeder circuit by output resistance.
4. a kind of stable automobile power system according to claim 3, it is characterized in that: charge circuit comprises current detection circuit and Circuit tuning, current detection circuit comprises aerotron Q1, the base stage of aerotron Q1 is connected with the input end of charge circuit by resistance R4, the base stage of aerotron Q1 is by resistance R3 ground connection, the grounded emitter of aerotron Q1, the collecting electrode of aerotron Q1 is to CPU transmission level signal, Circuit tuning comprises aerotron Q2, aerotron Q3, aerotron Q4 and field effect transistor Q5, the base stage of aerotron Q2 receives the control signal of CPU by resistance R5, the base stage of aerotron Q2 is by resistance R6 ground connection, the grounded emitter of aerotron Q2, the collecting electrode of aerotron Q2 is connected with the base stage of the Q3 of aerotron by resistance R7, the base stage of aerotron Q3 is connected with the input end of Circuit tuning by resistance R8, the base stage of aerotron Q4 is connected with the base stage of aerotron Q3, the grounded collector of aerotron Q3, the emitter of aerotron Q3 is connected with the emitter of aerotron Q4, the collecting electrode of aerotron Q4 is connected with the input end of Circuit tuning, the emitter of aerotron Q4 is connected with the input end of Circuit tuning by resistance R9, the emitter of aerotron Q4 is connected with the G pole of field effect transistor Q5 by resistance R10, the S pole of field effect transistor Q5 is connected with the input end of Circuit tuning, the D pole of field effect transistor Q5 is connected with the mouth of Circuit tuning.
5. a kind of stable automobile power system according to claim 1, is characterized in that: described transforming circuit comprises booster circuit and reduction voltage circuit.
6. a kind of stable automobile power system according to claim 1, it is characterized in that: also comprise protective circuit, protective circuit comprises protect IC, protect IC model is S8254, protective circuit comprises testing circuit, the input end of testing circuit is connected with the positive pole of each storage battery, and the mouth of testing circuit is connected with the induction end signal of protect IC, and described multiple storage battery is connected in series formation battery pack; Protective circuit also comprises the metal-oxide-semiconductor Q17 and metal-oxide-semiconductor Q16 that are connected in series with storage battery; The S pole of metal-oxide-semiconductor Q16 is connected with the signal end of protective circuit; the D pole of metal-oxide-semiconductor Q16 is connected with the D pole of metal-oxide-semiconductor Q17; the S pole of metal-oxide-semiconductor Q17 is connected with the positive pole of battery pack, and DOP control end, the COP control end of protect IC are connected with the G pole of metal-oxide-semiconductor Q17, the G pole of metal-oxide-semiconductor Q16 respectively.
7. a kind of stable automobile power system according to claim 6, is characterized in that: CPU is connected with button and read-out.
8. a kind of stable automobile power system according to claim 1, is characterized in that: discharging management circuit comprises the electric discharge managing chip matched with storage battery, and chip-shaped number of electric discharge management is S-8209A; The vdd terminal mouth of electric discharge managing chip is connected with the positive pole of corresponding storage battery by resistance, and the electric discharge VSS port of managing chip connects with the negative pole of corresponding storage battery; Also comprise the field effect transister matched with storage battery, the G pole of field effect transister is connected with the CB port of electric discharge managing chip, and the D pole of field effect transister connects with the negative pole of corresponding storage battery; The S pole of field effect transister is connected with the positive pole of corresponding storage battery by resistance.
9. a kind of stable automobile power system according to claim 8, it is characterized in that: in adjacent two electric discharge managing chips, the electric discharge managing chip corresponding with front storage battery is front electric discharge managing chip, the electric discharge managing chip corresponding with rear storage battery is rear electric discharge managing chip, and the negative pole of front storage battery is connected with the positive pole of rear storage battery; The DO port of rear electric discharge managing chip, CO port are connected respectively by the CTLD port of resistance and front electric discharge managing chip, CTLC port.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105150963A (en) * 2015-08-05 2015-12-16 东莞市钜大电子有限公司 Stable automobile power supply system
WO2017066916A1 (en) * 2015-10-20 2017-04-27 Unity Technology Development Corporation Limited Start-up power sources, in particular for vehicle battery charging
CN106685022A (en) * 2017-03-27 2017-05-17 深圳市华凯联有限公司 Device for realizing fast charging and fast discharging of power supply for emergency starting of automobile
CN106992594A (en) * 2017-02-17 2017-07-28 焦作市神盾科技有限公司 The triple protection system and device of weight equipment emergency starting power supply

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105150963A (en) * 2015-08-05 2015-12-16 东莞市钜大电子有限公司 Stable automobile power supply system
CN105150963B (en) * 2015-08-05 2017-12-08 东莞市钜大电子有限公司 A kind of automobile power system of stabilization
WO2017066916A1 (en) * 2015-10-20 2017-04-27 Unity Technology Development Corporation Limited Start-up power sources, in particular for vehicle battery charging
CN106992594A (en) * 2017-02-17 2017-07-28 焦作市神盾科技有限公司 The triple protection system and device of weight equipment emergency starting power supply
CN106992594B (en) * 2017-02-17 2019-09-27 焦作市神盾科技有限公司 The triple protection system and device of weight equipment emergency starting power supply
CN106685022A (en) * 2017-03-27 2017-05-17 深圳市华凯联有限公司 Device for realizing fast charging and fast discharging of power supply for emergency starting of automobile
US10840710B2 (en) 2017-03-27 2020-11-17 USA Human International Group LLC Device capable of achieving fast charge and fast discharge of a vehicle emergency starting power source

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