CN102611157B - Automobile low-voltage power supply charging device - Google Patents
Automobile low-voltage power supply charging device Download PDFInfo
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- CN102611157B CN102611157B CN201210065682.5A CN201210065682A CN102611157B CN 102611157 B CN102611157 B CN 102611157B CN 201210065682 A CN201210065682 A CN 201210065682A CN 102611157 B CN102611157 B CN 102611157B
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- voltage stabilizing
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Abstract
The invention provides an automobile low-voltage power supply charging device belonging to the technical field of automobile storage batteries, and solving the problems that in the prior art, the requirement for heavy-load current of an electrical appliance possibly can not be met if the DC/DC (direct current) output current is limited, however if the DC/DC current is not limited, heavy-current charge of a storage battery possibly happens to harm the storage battery. The automobile low-voltage power supply charging device comprises an automobile DC/DC inverter power supply and a storage battery; an output end of the automobile DC/DC inverter power supply supplies power to a vehicular electrical appliance; the output end of the automobile DC/DC inverter power supply also charges the storage battery through a voltage-stabilizing current limiter; the voltage-stabilizing current limiter is connected with a control unit capable of controlling the on/off of the voltage-stabilizing current limiter; and the two ends of the voltage-stabilizing current limiter are connected in parallel with a fly-wheel diode so that the storage battery supplies power to the vehicular electrical appliance. The automobile low-voltage power supply charging device provided by the invention not only can realize low-current charge of the storage battery, but also can meet the requirement for the power supply of the heavy-load electrical appliance in the automobile.
Description
Technical field
The invention belongs to automobile storage battery technical field, relate to a kind of automobile low-tension supply charging device.
Background technology
In car load low-tension supply, DC/DC inverter and 12V battery feed are to be attempted by car load electrical appliance circuit.When Vehicle Driving Cycle, general storage battery does not discharge, and the electric current of electrical appliance is all supplied with by DC/DC inverter, only has in the situations such as electrical appliance load increase suddenly, and storage battery starts electric discharge.ACC gear is " not starting car can give car inner ignition distributor powered appliance ", ON gear is " to all electric power supplies in car ", under ACC or ON range state, during work, power supply used is low tension battery provides, music appreciating power supply used during as ACC gear.
Under ACC or ON range state, make for a long time electrical appliance, will cause storage battery over-discharge can, the result of electric discharge is active material (Pb, the PbO on accumulator plate top layer
2) major part is reacted into the PbSO that volume is larger
4, stopped up the hole of pole plate, make inner density of electrolyte fast-descending, so after over-discharge can, accumulator voltage is very little.If now charged a battery, a large amount of PbSO
4be reduced into very soon Pb and PbO
2, in pole plate, because sulfuric acid is rapid, increases density of electrolyte increased rapidly simultaneously, the increase that the electric current of storage battery can be abnormal.Charging current is excessive in sum, and storage battery is had to a lot of harm, can cause a large amount of active materials to come off, and causes even short circuit of polar of self discharge, shortens service lifetime of accumulator.
In charging process, also can there is the problem of heating in storage battery, particularly the most easily cause storage battery heating during high current charge-discharge.Internal temperature of battery raises, and can cause the internal resistance of cell to decline, and charging current can further increase again conversely, and internal resistance further declines, and so vicious circle there will be thermal runaway to cause battery container gross distortion to be even split up.
Prior art is that 12V battery circuit and car load electrical appliance circuit are connected together, and is connected with DC/DC device output.Such circuit structure shortcoming is if the output current of restriction DC/DC just likely cannot meet the requirement that large load current appears in electrical appliance, if do not limit the electric current of DC/DC, just there will be the phenomenon of storage battery large current charge, and storage battery is worked the mischief.Therefore need to find a kind of requirement that can meet storage battery low current charge, meet again the demand of large load electrical appliance to power supply.
Summary of the invention
The present invention is directed to existing technology and have the problems referred to above, proposed a kind of automobile low-tension supply charging device, this charging device can meet storage battery can meet again the demand of large load electrical appliance to power supply in automobile with little current system charging.
The present invention realizes by following technical proposal: a kind of automobile low-tension supply charging device, comprise automobile DC/DC inverter and storage battery, the output of described automobile DC/DC inverter is to vehicle mounted electric power supply, it is characterized in that, the output of described automobile DC/DC inverter also by voltage stabilizing flow restricter to charge in batteries, described voltage stabilizing flow restricter is connected with the control unit that can control the conducting of voltage stabilizing flow restricter or cut-off, and at the two ends of voltage stabilizing flow restricter, fly-wheel diode in parallel makes storage battery to vehicle mounted electric power supply.
When automobilism, vehicle mounted electric power supply is directly given on DC/DC inverter one tunnel, another route control unit is controlled the conducting of voltage stabilizing flow restricter and the size that cut-off duration is controlled the charging current of storage battery according to the actual charging demand of storage battery, guarantees that storage battery is low current charge.Simultaneously when not starting car need to give part electric appliance or when load increases suddenly, storage battery, by the reverse-conducting principle of diode, is directly given vehicle mounted electric power supply.
In above-mentioned automobile low-tension supply charging device, described control unit comprises trigger, for detection of the temperature sensor of battery temp with for detection of the current sensor of charge in batteries electric current, the output of described temperature sensor is connected with the input of trigger respectively with the output of current sensor, and the output of described trigger is connected with the input of voltage stabilizing flow restricter.
Temperature sensor detects storage battery for the heat of discharge generation, and the temperature signal detecting is received by trigger.According to the temperature detecting, touch trigger and control the charging current that the output current of the voltage stabilizing flow restricter being attached thereto is adjusted accumulators, and when the battery temp detecting is higher than the limiting temperature of setting, voltage stabilizing flow restricter time-out charges a battery.Current sensor detects the actual demand electric current of storage battery and flows to trigger simultaneously, and the input current of trigger control voltage stabilizing flow restricter is controlled and exported to the required electric current of storage battery, and limits maximum charging current.The charging current that the electric current of guaranteeing to charge a battery is best suited under the internal environment of Current Temperatures and required electric current, and reach real-time adjustment, reduce the injury to storage battery, extend the useful life of storage battery.
In above-mentioned automobile low-tension supply charging device, described temperature sensor is arranged on the sidewall of storage battery, and the power end of temperature sensor is connected with above-mentioned storage battery.By storage battery, to temperature sensor, power, and the test side of temperature sensor is arranged on the sidewall of storage battery, actual temperature that can in-plant detection storage battery.And by storage battery power supply itself, shorten the conductor spacing that draws of power supply and temperature sensor.
In above-mentioned automobile low-tension supply charging device, described current sensor is arranged between storage battery and voltage stabilizing flow restricter on wire, and the power end of current sensor is connected with above-mentioned storage battery.By storage battery, to current sensor, powered, current sensor is arranged on charge in batteries circuit, allows charging circuit pass current sensor inner ring, when charging current is through current sensor, by magnetic induction effect detection, arrives the required charging current of storage battery.
In above-mentioned automobile low-tension supply charging device, described voltage stabilizing flow restricter comprises triode, the input of above-mentioned trigger is connected with the base stage of triode, and the collector electrode of triode is connected with the output of automobile DC/DC inverter, and the emitter of triode is connected with the positive pole of storage battery.
Triode has electric current of given base stage, can control the collector electrode of triode to emitter conducting, according to above-mentioned connection, trigger is controlled the voltage of the base stage of triode and is supplied with, the turn-on and turn-off time of the collector and emitter of triode, thus the electric current that control DC/DC inverter accumulators charges is the current optimal little electric current of storage battery.
First scheme as voltage stabilizing flow restricter, in above-mentioned automobile low-tension supply charging device, described voltage stabilizing flow restricter comprises IGBT, the input of above-mentioned trigger is connected with the gate pole of IGBT, the collector electrode of IGBT is connected with the output of automobile DC/DC inverter, and the emitter of IGBT is connected with the positive pole of storage battery.Trigger is controlled and is applied voltage to IGBT gate pole, thereby the turn-on and turn-off time of controlling the collector and emitter of IGBT changes to control output current size, has guaranteed that the electric current that DC/DC inverter accumulators charges is the current optimal little electric current of storage battery.
In above-mentioned automobile low-tension supply charging device, the anode of described afterflow diode is connected with the positive pole of storage battery, and the negative electrode of fly-wheel diode is connected with automobile DC/DC inverter.Such connected mode is in order to guarantee the directly accumulators conducting of automobile DC/DC inverter, when load increases suddenly or when DC/DC inverter is stopped power supply, the diode cathode voltage that connects storage battery is greater than now diode cathode voltage, be in the external world of diode and have forward voltage bias, but thereby the effect of disappearing mutually of external electrical field and the self-built internal electric field of diode increases the dissufion current of charge carrier causes forward current.The positive pole that battery current can flow through diode is thus realized the principle of diode forward conducting, to electrical appliance, powers.
In above-mentioned automobile low-tension supply charging device, described trigger is d type flip flop or JK flip-flop
Prior art is compared, and the present invention has the following advantages:
1, because thereby this device changes to change the charging current of voltage stabilizing flow restricter input current size control storage battery by the output current of trigger; When charging current surpasses limit value, electric current will, not increasing, charge a battery but be stabilized in limit value; Meet storage battery and charge with little current system, reduce the injury of storage battery, extend the useful life of storage battery.
2, because the present invention can be when load strengthens suddenly, storage battery is powered to vehicle mounted electrical apparatus together with DC/DC inverter, the reason of being powered to vehicle mounted electrical apparatus separately by storage battery when not starting up the car engine, meets the demand of large load electrical appliance to power supply in automobile.
3, owing to being provided with temperature sensor and being connected with current sensor on the sidewall of storage battery on the charging circuit of storage battery, according to the Current Temperatures of storage battery and required electric current, adjust in real time charging current.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is that voltage stabilizing flow restricter is the structural representation of triode;
Fig. 3 is that voltage stabilizing flow restricter is the structural representation of IGBT;
Fig. 4 is that voltage stabilizing flow restricter is the structural representation of field effect transistor.
In figure, 1, DC/DC inverter; 2, fly-wheel diode; 3, voltage stabilizing flow restricter; 4, storage battery; 5, electrical appliance; 6, control unit; 61, trigger; 62, temperature sensor; 63, current sensor.
Embodiment
Be below specific embodiments of the invention, and by reference to the accompanying drawings technical scheme of the present invention be further described, but the present invention is not limited to these embodiment.
Embodiment mono-, as shown in Figure 1, 2, this automobile low-tension supply charging device comprises automobile DC/DC inverter 1 and storage battery 4, and the output of automobile DC/DC inverter 1 is to 5 power supplies of vehicle mounted electrical equipment, and the output of automobile DC/DC inverter 1 is also by 4 chargings of 3 pairs of storage batterys of voltage stabilizing flow restricter.At the two ends of voltage stabilizing flow restricter 3, fly-wheel diode 2 in parallel makes 5 power supplies of 4 pairs of vehicle mounted electrical equipment of storage battery, and the anode of fly-wheel diode 2 is connected with the positive pole of storage battery 4, and the negative electrode of fly-wheel diode 2 is connected with automobile DC/DC inverter 1.
Voltage stabilizing flow restricter 3 is connected with the control unit 6 that can control 3 conductings of voltage stabilizing flow restricter or cut-off.Control unit 6 comprises trigger 61, for detection of the temperature sensor 62 of storage battery 4 temperature with for detection of the current sensor 63 of storage battery 4 charging currents.Temperature sensor 62 is arranged on the sidewall of storage battery 4, and the power end of temperature sensor 62 is connected with storage battery 4.Current sensor 63 is arranged between storage battery 4 and voltage stabilizing flow restricter 3 on wire, and the power end of current sensor 63 is connected with storage battery 4.The output of the output of temperature sensor 62 and current sensor 63 is connected with the input of trigger 61 respectively.The output of trigger 61 is connected with the input of voltage stabilizing flow restricter 3.Voltage stabilizing flow restricter 3 comprises triode, and the input of trigger 61 is connected with the base stage B of triode, and the collector electrode C of triode is connected with the output of automobile DC/DC inverter 1, and the emitter E of triode is connected with the positive pole of storage battery 4.The trigger 61 is here d type flip flop 61 or JK flip-flop 61.
The operation principle of this automobile low-tension supply charging device is as follows:
When automobilism, by DC/DC inverter 1, give vehicle mounted electrical equipment 5 power supplies, DC/DC inverter 1 accumulators 4 chargings simultaneously, temperature signal on storage battery 4 sidewalls that the temperature sensor 62 that trigger 61 receptions are attached thereto and current sensor 63 detect and the current signal on charging circuit, temperature signal and current signal start respectively trigger 61 and control the output current size of trigger 61, the size of trigger 61 output currents is given the transistor base B being attached thereto, the electric current that transistor collector C flows to emitter E is controlled in variation by transistor base B electric current.Thereby meet storage battery 4, can charge according to self temperature and required electric current, reduce the injury to storage battery 4.And when 4 power supply of needs storage battery, can to vehicle mounted electrical equipment 5, power by the fly-wheel diode 2 being connected in reverse parallel in transistor collector C and emitter E again.Meet storage battery 4 and charged with little current system, met again the demand of 5 pairs of power supplys of large load electrical appliance in automobile simultaneously.
By storage battery 4, give current sensor 63 power supplies, the test side of current sensor 63 is connected on storage battery 4 charging circuits, when charging current is through current sensor 63, current sensor 63 just detects required charging current simultaneously.Current sensor 63 detects the actual demand electric current of storage battery 4 and flows to trigger 61, is provided with restriction maximum charging current in trigger 61, controls the charging current scope of storage battery 4 and can better protect storage battery 4.When storage battery 4 temperature that detect are higher than the limiting temperature of setting, trigger 61 is controlled voltage stabilizing flow restricter 3 and is suspended accumulators 4 chargings.Guarantee the charging current that accumulators 4 charging currents are best suited under the internal environment of Current Temperatures and required electric current, and reach real-time adjustment, reduce the injury to storage battery 4, extend the useful life of storage battery 4.
Embodiment bis-, as shown in Figure 1, Figure 3, first scheme as voltage stabilizing flow restricter 3, in automobile low-tension supply charging device, voltage stabilizing flow restricter 3 comprises IGBT, the input of trigger 61 is connected with the gate pole G of IGBT, and the collector electrode C of IGBT is connected with the output of automobile DC/DC inverter 1, and the emitter E of IGBT is connected with the positive pole of storage battery 4.All the other syndetons are with embodiment mono-.Trigger 61 is controlled and is applied voltage to IGBT gate pole G, thereby the control collector electrode C of IGBT and the turn-on and turn-off time of emitter E change to control output current size, have guaranteed that the electric current that DC/DC inverter accumulators charges is the current optimal little electric current of storage battery.
Embodiment tri-, as Figure 1 and Figure 4, triode in above-mentioned voltage stabilizing flow restricter 3 is replaced by field effect transistor, the present embodiment metal-oxide-semiconductor in field effect transistor of giving an example, the source S of described metal-oxide-semiconductor is connected with automobile DC/DC inverter 1 by wire, and the grid G of metal-oxide-semiconductor is connected with the output of trigger 61, and the drain D of metal-oxide-semiconductor connects storage battery 4, and Opposite direction connection has fly-wheel diode 2 between the source S of metal-oxide-semiconductor and drain D, all the other syndetons are with embodiment mono-.Trigger 61 according to the detection signal of temperature sensor 62 and current sensor 63 as triggering signal, output is controlled electric current and is changed metal-oxide-semiconductor grid G electric current, also just changed the voltage between grid source electrode, thereby changed the electric current of exporting to storage battery 4, metal-oxide-semiconductor is voltage control current type device.And the source S of metal-oxide-semiconductor and the drain D not conducting of insulating, between the source S of metal-oxide-semiconductor and drain D, reverse parallel connection has fly-wheel diode 2, make storage battery 4 automobile DC/DC inverter 1 do not power or when load increases suddenly the electric current of storage battery 4 by diode forward conducting to 5 power supplies of vehicle mounted electrical equipment.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although more used the terms such as DC/DC inverter 1, fly-wheel diode 2, voltage stabilizing flow restricter 3, storage battery 4, electrical appliance 5, control unit 6, trigger 61, temperature sensor 62, current sensor 63 herein, do not got rid of the possibility of using other term.Use these terms to be only used to describe more easily and explain essence of the present invention; They are construed to any additional restriction is all contrary with spirit of the present invention.
Claims (5)
1. an automobile low-tension supply charging device, comprise automobile DC/DC inverter (1) and storage battery (4), the output of described automobile DC/DC inverter (1) is powered to vehicle mounted electrical equipment (5), it is characterized in that, the output of described automobile DC/DC inverter (1) also charges to storage battery (4) by voltage stabilizing flow restricter (3), described voltage stabilizing flow restricter (3) is connected with the control unit (6) that can control (3) conducting of voltage stabilizing flow restricter or cut-off, two ends fly-wheel diodes in parallel (2) at voltage stabilizing flow restricter (3) make storage battery (4) power to vehicle mounted electrical equipment (5), the anode of afterflow diode is connected with the positive pole of storage battery (4), the negative electrode of fly-wheel diode (2) is connected with automobile DC/DC inverter (1), described control unit (6) comprises trigger (61), for detection of the temperature sensor (62) of storage battery (4) temperature with for detection of the current sensor (63) of storage battery (4) charging current, the output of the output of described temperature sensor (62) and current sensor (63) is connected with the input of trigger (61) respectively, the output of described trigger (61) is connected with the input of voltage stabilizing flow restricter (3), current sensor (63) is arranged between storage battery (4) and voltage stabilizing flow restricter (3) on wire, and the power end of current sensor (63) is connected with above-mentioned storage battery (4), current sensor (63) detects the actual demand electric current of storage battery (4) and flows to trigger (61), trigger is provided with restriction maximum charging current in (61), when the storage battery detecting (4) temperature is higher than the limiting temperature of setting, trigger (61) is controlled voltage stabilizing flow restricter (3) and is suspended accumulators (4) charging.
2. automobile low-tension supply charging device according to claim 1, it is characterized in that, described temperature sensor (62) is arranged on the sidewall of storage battery (4), and the power end of temperature sensor (62) is connected with above-mentioned storage battery (4).
3. automobile low-tension supply charging device according to claim 1 and 2, it is characterized in that, described voltage stabilizing flow restricter (3) comprises triode, the input of above-mentioned trigger (61) is connected with the base stage of triode, the collector electrode of triode is connected with the output of automobile DC/DC inverter (1), and the emitter of triode is connected with the positive pole of storage battery (4).
4. automobile low-tension supply charging device according to claim 1 and 2, it is characterized in that, described voltage stabilizing flow restricter (3) comprises IGBT, the input of above-mentioned trigger (61) is connected with the gate pole of IGBT, the collector electrode of IGBT is connected with the output of automobile DC/DC inverter (1), and the emitter of IGBT is connected with the positive pole of storage battery (4).
5. automobile low-tension supply charging device according to claim 1 and 2, is characterized in that, described trigger (61) is d type flip flop or JK flip-flop.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210065682.5A CN102611157B (en) | 2012-01-13 | 2012-01-13 | Automobile low-voltage power supply charging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210065682.5A CN102611157B (en) | 2012-01-13 | 2012-01-13 | Automobile low-voltage power supply charging device |
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| CN102611157A CN102611157A (en) | 2012-07-25 |
| CN102611157B true CN102611157B (en) | 2014-08-06 |
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| CN103825255A (en) * | 2014-03-19 | 2014-05-28 | 航天科技控股集团股份有限公司 | Standby battery charging and discharging protection circuit for car-mounted terminal equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8022661B1 (en) * | 2008-04-28 | 2011-09-20 | Lockheed Martin Corporation | Battery over-discharge protection with dead-bus recovery |
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| JP2006266087A (en) * | 2005-03-22 | 2006-10-05 | Mikuni Corp | Power supply control device and power supply control method in vehicle |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8022661B1 (en) * | 2008-04-28 | 2011-09-20 | Lockheed Martin Corporation | Battery over-discharge protection with dead-bus recovery |
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| JP特開2006-266087A 2006.10.05 |
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