CN202737517U - Charging and discharging control device - Google Patents

Charging and discharging control device Download PDF

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Publication number
CN202737517U
CN202737517U CN 201220375822 CN201220375822U CN202737517U CN 202737517 U CN202737517 U CN 202737517U CN 201220375822 CN201220375822 CN 201220375822 CN 201220375822 U CN201220375822 U CN 201220375822U CN 202737517 U CN202737517 U CN 202737517U
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CN
China
Prior art keywords
circuit
charging
battery
power supply
charge
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Expired - Fee Related
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CN 201220375822
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Chinese (zh)
Inventor
陆秀平
欧阳永忠
吴太旗
黄谟涛
黄辰虎
李凯峰
黄贤源
徐广袖
刘传勇
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92859 FORCES PLA
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92859 FORCES PLA
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Priority to CN 201220375822 priority Critical patent/CN202737517U/en
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Publication of CN202737517U publication Critical patent/CN202737517U/en
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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model relates to a charging and discharging control device which comprises a battery, a printed wiring board, a charging circuit and a switching circuit. The input end of the charging circuit is connected with an external power supply for receiving power supplied by the external power supply, and the output end of the charging circuit is connected with the anode of the battery for charging the battery. A first input end of the switching circuit is connected with the external power supply for receiving power supplied by the external power supply, a second input end of the switching circuit is connected with the battery for receiving power supplied by the battery, the output end of the switching circuit is connected with equipment to be charged for charging the equipment to be charged. All electronic components on the charging circuit and the switching circuit are welded on the printed wiring board through printed wires. The control device uses the least components to solve three key technologies existing in the switching control of battery charging and enables all required modules to be installed on one printed wiring board, and thus a complete assembly is formed.

Description

A kind of charge-discharge controller
Technical field
The utility model relates to battery charging and power devices automatic switchover technology field, particularly a kind of charge-discharge controller of simple in structure, function-stable.
Background technology
In dual-use portable electronic device, need in-built battery is arranged in order to when external power supply disappearance or undertension, keep equipment and run without interruption.Present existing circuit is the basis mainly with application-specific integrated circuit (ASIC) greatly, complex circuit, and cost is high, can not adapt to different cell voltages.In actual design, need badly a kind of circuit simple, with low cost, can adapt to different batteries, reliable and stable charging and commutation circuit
The utility model content
Technical problem to be solved in the utility model provides a kind of charge-discharge controller, is used for solving the problem of battery charging and switching controls.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of charge-discharge controller, comprise battery and printed wiring board, and also comprise charging circuit and commutation circuit:
Described charging circuit, its input connects external power supply, is used for receiving the power supply of external power supply; Its output connects anode, is used for charging the battery;
Described commutation circuit, its first input end connects external power supply, is used for receiving the power supply of external power supply; Its second input connects battery, is used for receiving the power supply of battery; Its output connects charging equipment, is used for charging to charging equipment;
All electronic components on described charging circuit and the described commutation circuit all are welded on the printed wiring board by track.
On the basis of technique scheme, the utility model can also be done following improvement.
Further, be provided with current detection circuit on the described charging circuit, described current detection circuit comprises a PNP transistor and a resistance, and described resistance is arranged between the transistorized emitter of described PNP and the base stage.
Further, the transistorized collector current of described PNP forms negative feedback by a resistance to battery, is used for realizing that charging current is constant and is automatically changeb to the trickle state.
Further, be provided with the battery status indicating circuit on the described charging circuit, described battery status indicating circuit comprises a NPN transistor and a dichromatic LED; Described dichromatic LED is arranged between the collector and emitter of described NPN transistor, and the base stage of described NPN transistor is the input of described battery status indicating circuit, is used for controlling shutoff or the conducting of described NPN transistor; During described NPN transistor conducting, described dichromatic LED red luminotron is lighted, and constant current charge is being carried out in indication; During described NPN transistor cut-off, described dichromatic LED green luminotron is lighted, and pilot cell is full of, by constant current charge.
Further, described charging circuit also comprises a boost pressure controller, and its input connects external power supply by diode, and its output connects the resistance of two series connection, determines the output voltage of described boost pressure controller by the resistance value ratio of two resistance.
Further, described boost pressure controller adopts integrated circuit component LM2577.
Further, described commutation circuit comprises an electronic switch and two diodes; Described electronic switch, its drain electrode connects the positive terminal of the first diode, the negative terminal of the first diode is the output of described commutation circuit, connect charging equipment, the output of described commutation circuit connects the negative terminal of the second diode, the positive terminal of described the second diode is the first input end of described commutation circuit, connects external power supply; Its source electrode is the second input of described commutation circuit, connects battery; When its grid added electronegative potential, the output of battery was by described the first diode pair charging equipment power supply.
Further, the control of Electric potentials on the grid of described electronic switch is controlled by a NPN transistor is set, and its collector electrode of described NPN transistor is connected with the grid of described electronic switch, and its base stage connects external power supply, its grounded emitter.
Further, described commutation circuit detects switched voltage by integrated circuit component TL430C.
Further, described commutation circuit can be avoided by a Schmidt trigger is set the oscillatory occurences of element.
The beneficial effects of the utility model are: the utility model has solved with minimum components and parts the charging of different series quantity chemical cells has been controlled, the automatic fitration that realization is kept from the constant current charge to the trickle, also realized power devices from the automatic switchover between external power source and the internal cell, effectively solve when storage battery as external power supply and when switching because the repeatedly switching problem that the change in voltage of its internal resistance generation causes.And the needed whole modules of the utility model all are installed in a printed wiring board, interconnected the reaching with outside communicating by letter of all signals all realized by track, thereby make them become a complete assembly, have compact conformation, interconnected reliable, neat appearance, telotism, reliable and stable, energy-conserving and environment-protective, low cost and other advantages.
Description of drawings
Fig. 1 is the structural representation of charge-discharge controller described in the utility model.
In the accompanying drawing, the list of parts of each label representative is as follows:
1, battery, 2, printed wiring board, 3, charging circuit, 4, commutation circuit, 5, external power supply, 6, charging equipment.
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used for explaining the utility model, is not be used to limiting scope of the present utility model.
As shown in Figure 1, a kind of charge-discharge controller in the present embodiment comprises battery 1 and printed wiring board 2, also comprises charging circuit 3 and commutation circuit 4:
Described charging circuit 3, its input connects external power supply 5, is used for receiving the power supply of external power supply 5; Its output connects battery 1 positive pole, is used for to battery 1 charging;
Described commutation circuit 4, its first input end connects external power supply 5, is used for receiving the power supply of external power supply 5; Its second input connects battery 1, is used for receiving the power supply of battery 1; Its output connects charging equipment 6, is used for to charging equipment 6 chargings;
All electronic components on described charging circuit 3 and the described commutation circuit 4 all are welded on the printed wiring board 2 by track.
For charging circuit 3, be provided with current detection circuit on it.Described charging circuit 3 utilizes the resistance between the transistorized emitter of PNP and base stage to measure charging current.Simultaneously, the transistorized collector current of described PNP forms negative feedback by a resistance to battery 1, is used for realizing that charging current is constant and is automatically changeb to the trickle state.Particularly, PNP transistor turns when electric current reaches predetermined numerical value, its collector current to the negative feedback that battery 1 produces, can with battery 1 voltage not change electric current thereby make charging voltage maintain this voltage through resistance, made before battery 1 underfill, it is constant that charging current keeps; When the voltage that is recharged pond 1 reaches the voltage that presets, above-mentioned feedback current will be reduced to zero, and charger is automatically changeb to " trickle " state.
Having or not of feedback current can be used as the sign of " battery is recharged " and " battery is filled ", can show by a battery status indicating circuit.Described battery status indicating circuit utilizes a NPN crystal and a dichromatic LED to produce corresponding indication.Described dichromatic LED is arranged between the collector and emitter of described NPN transistor, and the base stage of described NPN transistor is the input of described battery status indicating circuit, is used for controlling shutoff or the conducting of described NPN transistor.When described NPN transistor conducting, described dichromatic LED red luminotron is lighted, and constant current charge is being carried out in indication; During described NPN transistor cut-off, described dichromatic LED green luminotron is lighted, and pilot cell 1 has been full of, by constant current charge.
Described charging circuit 3 also comprises a boost pressure controller, it adopts integrated circuit component LM2577, its input connects external power supply 5 by diode, its output connects the resistance of two series connection, resistance value ratio by two resistance is determined the output voltage of described boost pressure controller, thereby this charging circuit 3 can be used for any battery 1 charging.
Described commutation circuit 4 comprises an electronic switch and two diodes: described electronic switch, its drain electrode connects the positive terminal of the first diode, the negative terminal of the first diode is the output of described commutation circuit 4, connect charging equipment 6, the output of described commutation circuit 4 connects the negative terminal of the second diode, the positive terminal of described the second diode is the first input end of described commutation circuit 4, connects external power supply 5; Its source electrode is the second input of described commutation circuit 4, connects battery 1.When its grid added electronegative potential, the output of battery 1 was by 6 power supplies of described the first diode pair charging equipment, otherwise electronic switch is turned off.The collector electrode of control of Electric potentials on the grid of described electronic switch by a NPN transistor controls, and its base stage of described NPN transistor connects external power supply 5, grounded emitter.
Described commutation circuit 4 detects switched voltage by integrated circuit component TL430C, and when input voltage was lower than certain value Va, TL430C exported high potential, simultaneously NPN transistor output electronegative potential, and battery 1 is switched on; When input voltage was higher than certain value Vb, TL430C exported electronegative potential, simultaneously NPN transistor output high potential, and battery 1 is disconnected.
In control switching circuit in the past, Va=Vb.At this moment, if external power supply 5 is certain storage batterys, when it discharged into voltage and slightly is lower than Va, internal cell 1 was switched on, and equipment is by internal cell 1 power supply.Outside storage battery is not because there being load, and the voltage bottom out makes input voltage surpass Vb, and battery 1 is disconnected again.External storage battery is coupled with again load, and voltage begins to descend.So move in circles, make commutation circuit 4 be in " vibration " state.This state may make switching have nothing to do overheated and damage.Present embodiment can address this problem by a Schmidt trigger is set, and namely is to make Vb>Va.If the voltage recovery value of external storage battery from full load to zero load is Vd, needs only (Vb-Va) so>Vd, just can avoid " vibration " phenomenon fully.The concrete methods of realizing of present embodiment is to have added a feedback resistance between the control utmost point of the collector electrode of NPN transistor and TL430C, makes NPN and TL430C form a Schmidt trigger, utilizes the value of feedback resistance to set suitable (Vb-Va).
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims (10)

1. a charge-discharge controller comprises battery and printed wiring board, it is characterized in that, also comprises charging circuit and commutation circuit:
Described charging circuit, its input connects external power supply, is used for receiving the power supply of external power supply; Its output connects anode, is used for charging the battery;
Described commutation circuit, its first input end connects external power supply, is used for receiving the power supply of external power supply; Its second input connects battery, is used for receiving the power supply of battery; Its output connects charging equipment, is used for charging to charging equipment;
All electronic components on described charging circuit and the described commutation circuit all are welded on the printed wiring board by track.
2. charge-discharge controller according to claim 1, it is characterized in that, be provided with current detection circuit on the described charging circuit, described current detection circuit comprises a PNP transistor and a resistance, and described resistance is arranged between the transistorized emitter of described PNP and the base stage.
3. charge-discharge controller according to claim 2 is characterized in that, the transistorized collector current of described PNP forms negative feedback by a resistance to battery, is used for realizing the constant of charging current and is automatically changeb to the trickle state.
4. charge-discharge controller according to claim 1 is characterized in that, is provided with the battery status indicating circuit on the described charging circuit, and described battery status indicating circuit comprises a NPN transistor and a dichromatic LED; Described dichromatic LED is arranged between the collector and emitter of described NPN transistor, and the base stage of described NPN transistor is the input of described battery status indicating circuit, is used for controlling shutoff or the conducting of described NPN transistor;
During described NPN transistor conducting, described dichromatic LED red luminotron is lighted, and constant current charge is being carried out in indication; During described NPN transistor cut-off, described dichromatic LED green luminotron is lighted, and pilot cell is full of, by constant current charge.
5. charge-discharge controller according to claim 1, it is characterized in that, described charging circuit also comprises a boost pressure controller, its input connects external power supply by diode, its output connects the resistance of two series connection, determines the output voltage of described boost pressure controller by the resistance value ratio of two resistance.
6. charge-discharge controller according to claim 5 is characterized in that, described boost pressure controller adopts integrated circuit component LM2577.
7. charge-discharge controller according to claim 1 is characterized in that, described commutation circuit comprises an electronic switch and two diodes;
Described electronic switch, its drain electrode connects the positive terminal of the first diode, and the negative terminal of the first diode is the output of described commutation circuit, connects charging equipment; The output of described commutation circuit connects the negative terminal of the second diode, and the positive terminal of described the second diode is the first input end of described commutation circuit, connects external power supply; The source electrode of described electronic switch is the second input of described commutation circuit, connects battery; When the grid of described electronic switch adds electronegative potential, be used for the output of control battery by the power supply of described the first diode pair charging equipment.
8. charge-discharge controller according to claim 7, it is characterized in that, control of Electric potentials on the grid of described electronic switch is controlled by a NPN transistor is set, its collector electrode of described NPN transistor is connected with the grid of described electronic switch, its base stage connects external power supply, its grounded emitter.
9. charge-discharge controller according to claim 1 is characterized in that, described commutation circuit detects switched voltage by integrated circuit component TL430C.
10. charge-discharge controller according to claim 1 is characterized in that, described commutation circuit can be avoided by a Schmidt trigger is set the oscillatory occurences of element.
CN 201220375822 2012-07-31 2012-07-31 Charging and discharging control device Expired - Fee Related CN202737517U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220375822 CN202737517U (en) 2012-07-31 2012-07-31 Charging and discharging control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220375822 CN202737517U (en) 2012-07-31 2012-07-31 Charging and discharging control device

Publications (1)

Publication Number Publication Date
CN202737517U true CN202737517U (en) 2013-02-13

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CN 201220375822 Expired - Fee Related CN202737517U (en) 2012-07-31 2012-07-31 Charging and discharging control device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105006880A (en) * 2015-07-02 2015-10-28 浪潮电子信息产业股份有限公司 Device capable of realizing AC and DC power supply switching
CN109687550A (en) * 2018-12-29 2019-04-26 联想(北京)有限公司 A kind of power control, method and system
CN111030209A (en) * 2019-11-22 2020-04-17 南月(广州)机器人科技有限公司 Intelligence magic cube box that charges

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105006880A (en) * 2015-07-02 2015-10-28 浪潮电子信息产业股份有限公司 Device capable of realizing AC and DC power supply switching
CN109687550A (en) * 2018-12-29 2019-04-26 联想(北京)有限公司 A kind of power control, method and system
CN111030209A (en) * 2019-11-22 2020-04-17 南月(广州)机器人科技有限公司 Intelligence magic cube box that charges

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130213

Termination date: 20150731

EXPY Termination of patent right or utility model