CN104410139A - Automatic power-off circuit and automatic power-off device for full storage battery of storage battery car - Google Patents
Automatic power-off circuit and automatic power-off device for full storage battery of storage battery car Download PDFInfo
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- CN104410139A CN104410139A CN201410819041.3A CN201410819041A CN104410139A CN 104410139 A CN104410139 A CN 104410139A CN 201410819041 A CN201410819041 A CN 201410819041A CN 104410139 A CN104410139 A CN 104410139A
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- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 8
- 230000002459 sustained effect Effects 0.000 claims description 18
- 230000000052 comparative effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
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- H02J7/022—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to an automatic power-off circuit and an automatic power-off device for full charge of a storage battery car, which are connected with a charger and the storage battery and comprise a voltage reduction circuit, a three-terminal voltage stabilizing circuit, a voltage comparison circuit, a relay control circuit and a current detection circuit; the voltage reduction circuit reduces the direct current output of the adapter to 16V; the three-terminal voltage stabilizing circuit stabilizes the 16V voltage to 12V and provides a reference power supply; the voltage comparison circuit judges whether the circuit is in a charging or floating state; the relay receives a signal sent by the voltage comparison circuit and opens or closes the direct current output of the adapter through the relay switch; the current detection circuit determines the charging state of the circuit. The automatic power-off circuit and the automatic power-off device for the full-charging of the storage battery of the electric vehicle can be directly inserted between the charger of the electric vehicle and the storage battery for use, and can automatically disconnect the direct-current power supply of the charger after the storage battery of the electric vehicle is fully charged, so that the service life of the storage battery of the electric vehicle is prolonged, the electric energy is saved, and the manufacturing cost is not high.
Description
Technical field
The present invention relates to a kind of charging automatic power-off circuit, particularly a kind of electric vehicle accumulator is full of automatic power-off circuit.
Background technology
At present, the electromobile battery of China adopts lead acid accumulator mostly, generally has two kinds: one is two benches charger, i.e. first constant voltage charge, transfer trickle charge to after arriving threshold voltage to storage battery charging; Another kind is three stage chargers, i.e. first constant current, then constant voltage charge, also transfers trickle charge to after threshold voltage.Affect a lot of because have of service life of lead accumulator, one of them principal element is exactly that storage battery " overcharges ", and that is, most storage batterys is not damaged, but " filling bad "! Although charger is floating charge to below, for a long time floating charge is still very harmful to storage battery, not only wastes electric energy, also easily causes damage to storage battery electrode; Long overcharge makes storage battery heating cause battery case to be out of shape and accelerate the evaporation of storage battery electrolyte inside, and shortens battery.The best floating charge time is two hours, but generally people are cars on daytime, and charge in the evening, and few people can be filled with and got up to pull up attaching plug evening, and the fire led to thus is of common occurrence especially.Therefore, the basis of original charger installs an automatic power-off protection device additional and just seem necessary.
The patent of the charging of electric motor car in the past auto-power-off device mainly cuts off alternating current, as " a kind of electric motor car charging auto-power-off device (application number 201410011122.0) " realizes the cut-out of 220V AC power by magnetictrip and relevant control circuit; " electric motor car charging auto-power-off device (application number 201210070631.1) " controls to cut off alternating current by transformer secondary coil induced voltage.
Summary of the invention
The technical problem to be solved in the present invention is: in order to provide a kind of electric vehicle accumulator to be full of automatic power-off circuit, after electric vehicle accumulator is full of electricity, automatically disconnects charger DC power supply, without the need to carrying out any repacking to charger itself, belonging to plug and play type.
The technical solution adopted for the present invention to solve the technical problems is: a kind of battery of battery-driven truck is full of automatic power-off circuit, comprises reduction voltage circuit, three-terminal voltage-stabilizing circuit, voltage comparator circuit, control relay circuit and current detection circuit; Described reduction voltage circuit is connected with the adapter of charger, and the direct current of adapter exports and is down to 16V by reduction voltage circuit; Described three-terminal voltage-stabilizing circuit is connected with reduction voltage circuit, and the voltage stabilizing of 16V voltage to 12V, and is provided reference power supply by three-terminal voltage-stabilizing circuit; Described voltage comparator circuit is connected with three-terminal voltage-stabilizing circuit, and decision circuitry is in charging or floating charge state; Described control relay circuit is connected with the adapter of charger and voltage comparator circuit respectively, the signal that relay receiver voltage comparison circuit sends, and the direct current of being opened or closing adapter by relay switch is exported; Described current detection circuit is connected with charger, the charged state of decision circuitry.
In a preferred embodiment of the present invention, also comprise power display circuit, for show charger whether electric, be connected with LED red colored lamp by resistance R1.
In a preferred embodiment of the present invention, described reduction voltage circuit is connected with voltage stabilizing didoe by resistance R2.
In a preferred embodiment of the present invention, described voltage comparator circuit is made up of resistance R3, R4, LM339 voltage comparator, pull-up resistor R5, resistance R3 one end connects the output of three terminal regulator, one end connects the anti-phase input of LM339 voltage comparator, resistance R4 one end contact resistance R3, other end connection signal ground, pull-up resistor R5 one end connects the output of three terminal regulator, and the other end connects the output of LM339 voltage comparator.
In a preferred embodiment of the present invention, the comparative voltage of described LM339 voltage comparator reverse input end is 0.1V, and on the R4 that this comparative voltage is connected by resistance R3, R4, voltage obtains.
In a preferred embodiment of the present invention, described control relay circuit connects sustained diode 3 negative pole and relay K 1 by collector electrode one end of switch triode Q1, the emitter of switch triode Q1 connects the output of three terminal regulator, the positive pole of green LED is connected with sustained diode 3 positive pole with relay K 1, green LED negative pole is connected with signal ground, relay K 2 one end is connected with time relay KT2 mono-normally-closed contact with sustained diode 4 negative pole, the other end is connected with sustained diode 4 positive pole signal ground, time relay KT one end normally opened contact K1 is connected with sustained diode 5 negative pole, the other end is connected with sustained diode 5 positive pole signal ground.
The present invention also provides a kind of battery of battery-driven truck to be full of auto-power-off device, above-mentioned battery of battery-driven truck is adopted to be full of automatic power-off circuit, described battery of battery-driven truck is full of auto-power-off device and is connected with the charger of battery vehicle by charger direct current output access socket, is connected with storage battery by storage battery access socket.
The invention has the beneficial effects as follows: battery of battery-driven truck of the present invention is full of automatic power-off circuit and auto-power-off device and directly can be inserted between electrical bike charger and storage battery and uses, can after electric vehicle accumulator be full of electricity, the DC power supply of automatic disconnection charger, extend the life-span of electric vehicle accumulator, saved electric energy, cost is not high yet.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation that battery of battery-driven truck of the present invention is full of automatic power-off circuit;
Fig. 2 is the structural representation that battery of battery-driven truck of the present invention is full of auto-power-off device and is connected with charger, storage battery.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Figure 1 and Figure 2, battery of battery-driven truck of the present invention is full of automatic power-off circuit and auto-power-off device primarily of eight major part compositions: charger direct current exports access socket 1, power display circuit 2, reduction voltage circuit 3, three-terminal voltage-stabilizing circuit 4, voltage comparator circuit 5, control relay circuit 6, current detection circuit 7, storage battery access socket 8.
Charger direct current exports the access socket of access socket 1 for the DC terminal of electric motor car charging adapter; It is electric that power display circuit 2 mainly shows that this device obtains, and can charge; The direct current of electric motor car charging adapter mainly exports and is down to 16V by reduction voltage circuit 3; Three-terminal voltage-stabilizing circuit 4 is by the voltage stabilizing of 16V voltage to 12V, for voltage comparator circuit 5 provides reference power supply; Voltage comparator circuit 5 mainly decision circuitry is in charging or floating charge state; Control relay circuit 6 is the time relay K switch T1 controlling DC output end, exports for cutting off electric motor car charging adapter direct current; Current detection circuit 7 for detecting the electric current of charge in batteries, by the charged state of the size decision circuitry of charging current; Storage battery access socket 8 is for the access of the charging inlet of electromobile battery.
Circuit design feature of the present invention is as follows:
(1) power display circuit 2 is connected with LED1 red colored lamp by resistance R1, and current design is about 20 milliamperes;
(2) reduction voltage circuit 3 is connected with 16V voltage stabilizing didoe by resistance R2, and design current is about 30 milliamperes;
(3) voltage comparator circuit 5 is by resistance R3, R4, LM339, and pull-up resistor R5 is formed, and resistance R3 one end connects three terminal regulator 7812 output, and one end connects the anti-phase input of LM339; R4 one end connects R3, other end connection signal ground; Pull-up resistor R5 one end connects three terminal regulator 7812 output, and the other end connects the output of LM339, and this circuital current is produced by R3, R4, is designed to about 5 milliamperes;
(4) control relay circuit 6 by
collector electrode one end of switch triode Q1 connects sustained diode 3 negative pole and relay K 1, the emitter of switch triode Q1 connects three terminal regulator 7812 and exports, green LED LED2 positive pole is connected with sustained diode 3 positive pole with relay K 1, green LED LED2 negative pole is connected with signal ground, and this circuit design electric current is about 40 milliamperes;
relay K 2 one end is connected with time relay KT2 mono-normally-closed contact with sustained diode 4 negative pole, and the other end is connected with sustained diode 4 positive pole signal ground, and this branch current designs about 40 milliamperes;
time relay KT one end normally opened contact K1 is connected with sustained diode 5 negative pole, and the other end is connected with sustained diode 5 positive pole signal ground, and this branch current is designed to about 40 milliamperes;
(5) LM339 voltage comparator inverting input design comparison voltage is 0.1V, and on the R4 that this comparative voltage is connected by resistance R3, R4, voltage obtains;
(6) design current through control circuit is above about 175 milliamperes (0.175 amperes) altogether, and charges normal compared with period big current (1.8 amperes ~ 2.5 amperes), does not substantially affect.
Main operational principle of the present invention is as follows:
(1) when the storage battery access socket DS2 of this device is first inserted on storage battery, due to anti-electric current backflow diode D5 effect, device circuit does not work;
(2) when " the charger direct current input socket DS1 " of this device first receives charger DC output end, and " storage battery access socket DS2 " be not when receiving on storage battery, because normally opened contact K2 is in parallel with time relay KT normally-closed contact KT1, circuit obtains electric, three terminal regulator 7812 stable output voltage 12V, and LM339 in-phase input end voltage is 0, inverting input is 0.1V, LM339 output low level, Q1 triode ON, relay K 1 obtains electric, normally-closed contact K1 closes, time relay KT obtains electric timing, because time relay KT sets disconnect after electric 2 hours, therefore time relay KT normally-closed contact is still in closed conducting state, simultaneously relay K 2 obtains electric, and normally opened contact K2 closes, and circuit enters state to be charged,
(3) when device enters charged state, about 44V (48V battery pack) is about because storage battery forces down, circuit carries out large current charge state (48V12Ah charging current 1.8 amperes by D6, 48V20Ah charging current is 2.5 Amps), voltage on current sampling resistor R6 is about (0.27V ~ 0.37V), this resistance R6 inputs with LM339 voltage comparator homophase and is connected, therefore homophase input is greater than anti-phase input, LM339 voltage comparator exports high level, switch triode Q1 ends, relay K 1 dead electricity, normally opened contact K1 disconnects, time relay KT dead electricity, circuit enters the stable state charging stage,
(4) when charge in batteries is full of, charging current drops to milliampere level (being generally about 200 milliamperes ~ about 300 milliamperes), pressure drop on current sampling resistor R6, be reduced to 0.045V, lower than the 0.1V of anti-phase input, LM339 voltage comparator output low level, Q1 conducting, relay K 1 obtains electric, green LED LED2 lights, show that circuit enters floating charge state, because normally opened contact K1 closes, time relay KT obtains electric timing, KT1 after 2 hours, KT2 normally-closed contact disconnects, cause relay K 2 dead electricity, normally opened contact K2 disconnects, charger direct current input socket power supply is cut off.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to right.
Claims (7)
1. battery of battery-driven truck is full of an automatic power-off circuit, it is characterized in that: comprise reduction voltage circuit, three-terminal voltage-stabilizing circuit, voltage comparator circuit, control relay circuit and current detection circuit;
Described reduction voltage circuit is connected with the adapter of charger, and the direct current of adapter exports and is down to 16V by reduction voltage circuit;
Described three-terminal voltage-stabilizing circuit is connected with reduction voltage circuit, and the voltage stabilizing of 16V voltage to 12V, and is provided reference power supply by three-terminal voltage-stabilizing circuit;
Described voltage comparator circuit is connected with three-terminal voltage-stabilizing circuit, and decision circuitry is in charging or floating charge state;
Described control relay circuit is connected with the adapter of charger and voltage comparator circuit respectively, the signal that relay receiver voltage comparison circuit sends, and the direct current of being opened or closing adapter by relay switch is exported;
Described current detection circuit is connected with charger, the charged state of decision circuitry.
2. battery of battery-driven truck as claimed in claim 1 is full of automatic power-off circuit, it is characterized in that: also comprise power display circuit, for show charger whether electric, be connected with LED red colored lamp by resistance R1.
3. battery of battery-driven truck as claimed in claim 1 is full of automatic power-off circuit, it is characterized in that: described reduction voltage circuit is connected with voltage stabilizing didoe by resistance R2.
4. battery of battery-driven truck as claimed in claim 1 is full of automatic power-off circuit, it is characterized in that: described voltage comparator circuit is made up of resistance R3, R4, LM339 voltage comparator, pull-up resistor R5, resistance R3 one end connects the output of three terminal regulator, one end connects the anti-phase input of LM339 voltage comparator, resistance R4 one end contact resistance R3, other end connection signal ground, pull-up resistor R5 one end connects the output of three terminal regulator, and the other end connects the output of LM339 voltage comparator.
5. battery of battery-driven truck as claimed in claim 4 is full of automatic power-off circuit, and it is characterized in that: the comparative voltage of described LM339 voltage comparator reverse input end is 0.1V, on the R4 that this comparative voltage is connected by resistance R3, R4, voltage obtains.
6. battery of battery-driven truck as claimed in claim 1 is full of automatic power-off circuit, it is characterized in that: described control relay circuit connects sustained diode 3 negative pole and relay K 1 by collector electrode one end of switch triode Q1, the emitter of switch triode Q1 connects the output of three terminal regulator, the positive pole of green LED is connected with sustained diode 3 positive pole with relay K 1, green LED negative pole is connected with signal ground, relay K 2 one end is connected with time relay KT2 mono-normally-closed contact with sustained diode 4 negative pole, the other end is connected with sustained diode 4 positive pole signal ground, time relay KT one end normally opened contact K1 is connected with sustained diode 5 negative pole, the other end is connected with sustained diode 5 positive pole signal ground.
7. a battery of battery-driven truck is full of auto-power-off device, it is characterized in that: adopt the battery of battery-driven truck as described in any one of claim 1-6 to be full of automatic power-off circuit, described battery of battery-driven truck is full of auto-power-off device and is connected with the charger of battery vehicle by charger direct current output access socket, is connected with storage battery by storage battery access socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410819041.3A CN104410139B (en) | 2014-12-25 | 2014-12-25 | Automatic power-off circuit and automatic power-off device for full storage battery of storage battery car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410819041.3A CN104410139B (en) | 2014-12-25 | 2014-12-25 | Automatic power-off circuit and automatic power-off device for full storage battery of storage battery car |
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| CN104410139A true CN104410139A (en) | 2015-03-11 |
| CN104410139B CN104410139B (en) | 2017-09-22 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106329675A (en) * | 2016-11-19 | 2017-01-11 | 汤瑷语 | Charging device achieving automatic power off and charging method |
| CN106655419A (en) * | 2016-10-20 | 2017-05-10 | 广西大学 | Safe charge circuit for emergency lamp battery |
| CN107895985A (en) * | 2017-12-05 | 2018-04-10 | 李明 | A kind of intelligent charging system |
| CN110112798A (en) * | 2019-04-03 | 2019-08-09 | 六安市同心畅能电子科技有限公司 | Electro-mobile battery-charging protector circuit |
| CN111682602A (en) * | 2020-05-15 | 2020-09-18 | 上海市基础工程集团有限公司 | Charging control device and method for storage battery car in tunnel |
| CN112134338A (en) * | 2019-06-24 | 2020-12-25 | 重庆宗申通用动力机械有限公司 | Automatic start-stop control system of direct current generator set |
| CN112776614A (en) * | 2019-11-11 | 2021-05-11 | 魏力 | Circuit of multiunit power for electric motor car |
| CN113949040A (en) * | 2021-10-19 | 2022-01-18 | 浙江法然特浙科科技有限公司 | Automatic power-off charger system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106655419A (en) * | 2016-10-20 | 2017-05-10 | 广西大学 | Safe charge circuit for emergency lamp battery |
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| CN112134338A (en) * | 2019-06-24 | 2020-12-25 | 重庆宗申通用动力机械有限公司 | Automatic start-stop control system of direct current generator set |
| CN112776614A (en) * | 2019-11-11 | 2021-05-11 | 魏力 | Circuit of multiunit power for electric motor car |
| CN111682602A (en) * | 2020-05-15 | 2020-09-18 | 上海市基础工程集团有限公司 | Charging control device and method for storage battery car in tunnel |
| CN111682602B (en) * | 2020-05-15 | 2024-01-30 | 上海市基础工程集团有限公司 | Charging control device and control method for storage battery car in tunnel |
| CN113949040A (en) * | 2021-10-19 | 2022-01-18 | 浙江法然特浙科科技有限公司 | Automatic power-off charger system |
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