CN101741124A - Battery charging circuit and power supply device - Google Patents
Battery charging circuit and power supply device Download PDFInfo
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- CN101741124A CN101741124A CN201010102706A CN201010102706A CN101741124A CN 101741124 A CN101741124 A CN 101741124A CN 201010102706 A CN201010102706 A CN 201010102706A CN 201010102706 A CN201010102706 A CN 201010102706A CN 101741124 A CN101741124 A CN 101741124A
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Abstract
The invention is suitable for the field of batteries, which provides a battery charging circuit and a power supply device. The circuit comprises a switch module and a charging control module, wherein the input end of the switch module is connected with the output end of a power supply, and the output end of the switch module is connected with the input end of a battery; the charging control end of the charging control module is connected to the control end of the switch module, and an output control signal controls the conduction of the switch module; the battery voltage detection end of the charging control module is connected to the input end of the battery, and the charging control module detects battery voltage; and the current regulation end of the charging control module is connected to the input end of the switch module, and charging current is regulated according to the magnitude of the battery voltage detected by the battery voltage detection end. The invention detects the voltage of the battery and carries out adaptive regulation on the charging current of the battery according to the magnitude of the detected battery voltage, so that the battery is effectively charged at different voltage stages, the service life of the battery is prolonged, the circuit is simple and reliable, and the cost is saved.
Description
Technical field
The invention belongs to field of batteries, relate in particular to a kind of battery charger and electric supply installation.
Background technology
Lithium ion battery is widely used as the new electric energy storage medium, characteristics such as energy density is big, output voltage is high, self discharge is little, memory-less effect, long circulation life that it has.Lithium ion battery has been applied to every field, various lithium ion cell charging circuit have appearred thereupon, wherein more common as the circuit of Based Intelligent Control charging with Switching Power Supply, because its simplicity of design, convenient, flexible, technology maturation are widely adopted, but the precision of this circuit output voltage is not high, and charging current can not adjusted automatically according to the height of lithium ion battery voltage, thereby can cause lithium ion battery to be not fully filled electricity or overcharge, battery is damaged, influence the useful life of battery, bring very big inconvenience to the user.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of battery charger, is intended to solve in the existing battery charger charging current and can regulate according to the size of cell voltage and cause battery to be not fully filled or over-charging of battery, the problem that battery is damaged.
The embodiment of the invention is achieved in that a kind of battery charger, is battery charge by power supply, and described circuit comprises: switch module and charge control module;
The input of switch module connects the output of power supply, and output connects the input of battery;
The charging control end of charge control module is connected to the control end of described switch module, and the output control signal is controlled described switch module conducting;
The battery voltage detection end of charge control module is connected to the input of battery, and cell voltage is detected;
The Current Regulation end of charge control module is connected to the input of described switch module, according to the size of the detected cell voltage of battery voltage detection end charging current is regulated.
Another purpose of the embodiment of the invention is to provide a kind of electric supply installation that comprises above-mentioned battery charger.
In the battery charger that the embodiment of the invention provides, battery voltage detection end by charge control module detects the voltage of battery, the Current Regulation end of charge control module carries out adapt according to the size of detected cell voltage to the size of the charging current of battery, make battery effectively be charged in the different voltage stage, prolonged the useful life of battery, and circuit is simple and reliable, saves cost.
Description of drawings
Fig. 1 is the structure principle chart of the battery charger that provides of the embodiment of the invention;
Fig. 2 is the circuit diagram of the battery charger that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The embodiment of the invention detects the voltage of battery, according to the size of detected cell voltage the size of the charging current of battery is carried out adapt, makes battery effectively be charged in the different voltage stage.
Fig. 1 shows the structural principle of the battery charger that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention.
This battery charger is widely used in the various electric supply installations.
The input of switch module 21 is connected to the output of power supply 1, and output connects the input of battery 3;
The charging control end of charge control module 22 is connected to the control end of switch module 21,21 conductings of output control signal control switch module, and power supply 1 gives battery 3 chargings.
The battery voltage detection end of charge control module 22 is connected to the input of battery 3, and cell voltage is detected.
The Current Regulation end of charge control module 22 is connected to the input of switch module 21, according to the size of the detected cell voltage of battery voltage detection end the charging current of battery 3 is regulated, and makes battery 3 effectively be charged in the different voltage stage.
As a preferred embodiment of the present invention, battery charger 2 also comprises over-charge protective module 24, is connected in the battery charge loop, when battery 3 is full of and switch module 21 when in time not turn-offing, cuts off the charge circuit of battery, and the protection battery is not overcharged.
As a preferred embodiment of the present invention, battery charger 2 also comprises charging indicating module 23, is connected the charged state output of charge control module 22, the charged state of pilot cell.
The battery charger that the embodiment of the invention provides can be used for to lithium cell charging, also can be used for to other chemical cell chargings.
Adopt battery charger that the embodiment of the invention provides to charge fully and can not overcharge to lithium ion battery, regulate the size of charging current according to the size adaptation of lithium ion battery voltage, guarantee that lithium ion battery can both effectively charge in the different voltage stage (pre-charging stage, constant current charge stage, constant voltage charge stage), improve the precision of battery charger output voltage, had advantages such as simple and reliable, cheap, light, efficient.
Fig. 2 shows the circuit structure of the battery charger that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention.
In embodiments of the present invention, switch module 21 can adopt integrated chip U1 to realize.Integrated chip U1 is low conduction impedance field effect transistor, and its grid is connected to the charging control end of charge control module 22, and source electrode is connected to the output of power supply 1, and drain electrode is connected to the input of battery 3.
As one embodiment of the present of invention, battery charger 2 also comprises diode D1 and resistance R 1, and the anode of diode D1 is connected to the output of power supply 1, and negative electrode is connected to the input of switch module 21 by resistance R 1.
The power input VCC of charging chip U2 is connected to the negative electrode of diode D1, temperature detection end TS is by resistance R 7 ground connection, charging control end CC is connected to the negative electrode of diode D1 by resistance R 2, charging Enable Pin FB/CE is connected to the negative electrode of diode D1, Current Regulation end SNS is connected to the input of switch module 21, battery voltage detection end BAT is connected to the input of battery 3, earth terminal VSS ground connection, and charged state output STAT connects charging indicating module 23;
Resistance R 6 and resistance R 10 are connected in series between the negative electrode and ground of diode D1 successively, and the end that is connected in series of resistance R 6 and resistance R 10 is connected to the temperature detection end TS of charging chip U2.
In embodiments of the present invention, resistance R 10 can adopt negative temperature coefficient resister, be used to detect the surface temperature of battery 3, and testing result fed back to charging chip U2, when the surface temperature of battery 3 exceeds when preestablishing scope, the charging control end output control signal of charging chip U2, control switch module 21 disconnects, and power supply 1 stops to battery 3 chargings.When the surface temperature of battery 3 just often, the charging Enable Pin FB/CE of charging chip U2 gets electric, starts working, the charging control end CC output control signal of charging chip U2 also drives field effect transistor U1 conducting, it is battery 3 chargings that power supply 1 begins.Charging chip U2 can be according to the situation of the detected cell voltage of battery voltage detection end BAT, and SNS adjusts the size of charging current automatically through the Current Regulation end, thereby has guaranteed that battery 3 was effectively charged in the different voltage stage.
As one embodiment of the present of invention, charge control module 22 also comprises ripple capacitor C 1 and the filter capacitor C2 that is connected in parallel with ripple capacitor C 1.One end of ripple capacitor C 1 is connected the link that the power input VCC of charging chip U2 is connected with the negative electrode of diode D1, the other end ground connection of ripple capacitor C 1.Ripple capacitor C 1 is used to suppress voltage fluctuation, guarantees that voltage is stable.Filter capacitor C2 is used for filtering interfering, improves the quality of power supply, guarantees the reliable and stable work of charging chip U2.
Resistance R 5 is connected between the charged state output STAT and ground of charging chip U2;
The negative electrode of light-emitting diode D2 is connected to the charged state output STAT of charging chip U2, and anode is connected the output of power supply 1 by resistance R 3;
The anode of light-emitting diode D3 is connected to the charged state output STAT of charging chip U2, and negative electrode is by resistance R 4 ground connection.
In battery 3 chargings just often, the charged state output STAT of charging chip U2 is a low level, and light-emitting diode D2 lights, and light-emitting diode D3 extinguishes; When battery 3 was full of electricity, the charged state output STAT of charging chip U2 was a high level, and light-emitting diode D3 lights, and light-emitting diode D2 extinguishes; When the surface temperature of battery 3 occurs when unusual, light-emitting diode D3 and light-emitting diode D2 are simultaneously little bright.
Over-charge protective module 24 comprises protection chip U3, two MOS chip U4, resistance R 8, resistance R 9 and capacitor C 5, wherein:
The power end VCC of protection chip U3 is connected to the input anode B+ of battery 3 by resistance R 9, and power end VCC also is connected to the ground end GND of protection chip U3 by capacitor C 5, and the ground end GND of protection chip U3 is connected to the input cathode B-of battery 3;
The grid of the first metal-oxide-semiconductor U4A is connected to the over-charging of battery control end OC of protection chip U3 among two MOS chip U4, source ground, source electrode also is connected to the current detecting input CS of protection chip U3 by resistance R 8, drain electrode is connected to the drain electrode of the second metal-oxide-semiconductor U4B among two MOS chip U4;
The battery that the grid of the second metal-oxide-semiconductor U4B is connected to protection chip U3 is crossed and is put control end OD, and source electrode is connected to the input cathode B-of battery 3.
When charging was finished, under the normal condition, the charging control end of charging chip U2 output control signal was also controlled field effect transistor U1 disconnection, stops charging.When battery 3 is full of and field effect pipe U1 when in time not turn-offing, cut off by the charge circuit of over-charge protective module 24 battery 3, the protection battery is not overcharged, and guarantees reliable and stable charging.
As one embodiment of the present of invention, battery charger 2 also comprises ripple capacitor C 3 and the filter capacitor C4 that is connected in parallel with ripple capacitor C 3.One end of ripple capacitor C 3 is connected to the link that switch module 21 is connected with battery 3, the other end ground connection of ripple capacitor C 3.Ripple capacitor C 3 is used to suppress voltage fluctuation, guarantees that voltage is stable.Filter capacitor C4 is used for filtering interfering, improves the quality of power supply.
In the battery charger that the embodiment of the invention provides, battery voltage detection end by charge control module detects the voltage of battery, the Current Regulation end of charge control module carries out adapt according to the size of detected cell voltage to the size of the charging current of battery, make battery effectively be charged in the different voltage stage, prolonged the useful life of battery, and circuit is simple and reliable, saves cost.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a battery charger is a battery charge by power supply, it is characterized in that, described circuit comprises: switch module and charge control module;
The input of switch module connects the output of power supply, and output connects the input of battery;
The charging control end of charge control module is connected to the control end of described switch module, and the output control signal is controlled described switch module conducting;
The battery voltage detection end of charge control module is connected to the input of battery, and cell voltage is detected;
The Current Regulation end of charge control module is connected to the input of described switch module, according to the size of the detected cell voltage of battery voltage detection end charging current is regulated.
2. battery charger as claimed in claim 1 is characterized in that described switch module comprises field effect transistor;
The grid of described field effect transistor is connected to the charging control end of described charge control module, and source electrode is connected to the output of power supply, and drain electrode is connected to the input of battery.
3. battery charger as claimed in claim 1 is characterized in that, described charge control module comprises charging chip U2, resistance R 2, resistance R 6, resistance R 10, and resistance R 7;
The power input of described charging chip U2 is connected to the negative electrode of described diode D1, the temperature detection end is by described resistance R 7 ground connection, the charging control end is connected to the negative electrode of described diode D1 by described resistance R 2, the charging Enable Pin is connected to the negative electrode of described diode D1, the Current Regulation end is connected to the input of described switch module, and the battery voltage detection end is connected to the input of battery;
Described resistance R 6 and described resistance R 10 are connected in series between the negative electrode and ground of described diode D1 successively, and described resistance R 6 is held the temperature detection end that is connected to described charging chip U2 with being connected in series of described resistance R 10.
4. battery charger as claimed in claim 3 is characterized in that described charge control module also comprises ripple capacitor C 1, and the filter capacitor C2 that is connected in parallel with described ripple capacitor C 1;
One end of described ripple capacitor C 1 is connected the link that the power input of described charging chip U2 links to each other with the negative electrode of diode D1, the other end ground connection of described ripple capacitor C 1.
5. battery charger as claimed in claim 1 is characterized in that, described battery charger also comprises:
Be connected the over-charge protective module in the battery charge loop, when battery is full of and during described switch module conducting, cuts off the charge circuit of battery.
6. battery charger as claimed in claim 5 is characterized in that, described over-charge protective module comprises protection chip U3, two MOS chip U4, resistance R 8, resistance R 9, and capacitor C 5;
The power end of described protection chip U3 is connected to the input anode of battery by described resistance R 9, also is connected to the ground end of described protection chip U3 by described capacitor C 5, and the ground end of described protection chip U3 is connected to the input cathode of battery;
The grid of first metal-oxide-semiconductor is connected to the over-charging of battery control end of described protection chip U3 among the described couple of MOS chip U4, source ground, the source electrode of described first metal-oxide-semiconductor also is connected to the current detecting input of described protection chip U3 by described resistance R 8, drain electrode is connected to the drain electrode of second metal-oxide-semiconductor among the described couple of MOS chip U4;
The battery that the grid of described second metal-oxide-semiconductor is connected to described protection chip U3 is crossed and is put control end, and source electrode is connected to the input cathode of battery.
7. battery charger as claimed in claim 1 is characterized in that, described battery charger also comprises:
Be connected the charging indicating module of the charged state output of described charge control module, be used for the charged state of pilot cell.
8. battery charger as claimed in claim 4 is characterized in that, described charging indicating module comprises light-emitting diode D2, light-emitting diode D3, resistance R 3, resistance R 4, and resistance R 5;
Described resistance R 5 is connected between the charged state output and ground of described charge control module;
The negative electrode of described light-emitting diode D2 is connected to the charged state output of described charge control module, and anode is connected the output of power supply by described resistance R 3;
The anode of described light-emitting diode D3 is connected to the charged state output of described charge control module, and negative electrode is by described resistance R 4 ground connection.
9. battery charger as claimed in claim 2 is characterized in that described battery charger also comprises ripple capacitor C 3, and the filter capacitor C4 that is connected in parallel with described ripple capacitor C 3;
One end of described ripple capacitor C 3 is connected to the link that described field effect transistor is connected with battery, the other end ground connection of described ripple capacitor C 3.
10. electric supply installation that comprises the battery charger of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010102706A CN101741124A (en) | 2010-01-25 | 2010-01-25 | Battery charging circuit and power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010102706A CN101741124A (en) | 2010-01-25 | 2010-01-25 | Battery charging circuit and power supply device |
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| Publication Number | Publication Date |
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| CN101741124A true CN101741124A (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010102706A Pending CN101741124A (en) | 2010-01-25 | 2010-01-25 | Battery charging circuit and power supply device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426138A (en) * | 2013-08-20 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Over-discharge protection circuit of chargeable battery |
| CN104779653A (en) * | 2014-01-10 | 2015-07-15 | 海洋王（东莞）照明科技有限公司 | Charging indicating circuit |
| CN105634062A (en) * | 2016-01-31 | 2016-06-01 | 苏黎 | Charging circuit and system for mobile terminal |
| CN105656117A (en) * | 2016-01-18 | 2016-06-08 | 深圳市中孚能电气设备有限公司 | Charging circuit and charging method thereof |
| CN105743180A (en) * | 2014-12-24 | 2016-07-06 | 广东欧珀移动通信有限公司 | Method for charging electronic equipment, and electronic equipment |
| CN107104492A (en) * | 2017-07-04 | 2017-08-29 | 红豆电信有限公司 | Power circuit |
| CN108832679A (en) * | 2018-06-25 | 2018-11-16 | 吉林工程技术师范学院 | Electric car DC charging machine control system |
| CN109031097A (en) * | 2018-07-25 | 2018-12-18 | 天地融电子（天津）有限公司 | A kind of chip-detecting apparatus |
| WO2019047434A1 (en) * | 2017-09-11 | 2019-03-14 | 深圳易马达科技有限公司 | Charging circuit and charging device |
| CN113489114A (en) * | 2021-08-03 | 2021-10-08 | 广东友电新能源科技有限公司 | Charging control circuit, charging control method and charging device |
| CN113629813A (en) * | 2021-08-13 | 2021-11-09 | 瀚昕微电子(无锡)有限公司 | Charging equipment |
-
2010
- 2010-01-25 CN CN201010102706A patent/CN101741124A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426138A (en) * | 2013-08-20 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Over-discharge protection circuit of chargeable battery |
| CN104779653A (en) * | 2014-01-10 | 2015-07-15 | 海洋王（东莞）照明科技有限公司 | Charging indicating circuit |
| CN105743180A (en) * | 2014-12-24 | 2016-07-06 | 广东欧珀移动通信有限公司 | Method for charging electronic equipment, and electronic equipment |
| CN105743180B (en) * | 2014-12-24 | 2019-09-06 | Oppo广东移动通信有限公司 | Method and electronic equipment for charging for electronic equipment |
| CN105656117A (en) * | 2016-01-18 | 2016-06-08 | 深圳市中孚能电气设备有限公司 | Charging circuit and charging method thereof |
| CN105634062A (en) * | 2016-01-31 | 2016-06-01 | 苏黎 | Charging circuit and system for mobile terminal |
| CN107104492A (en) * | 2017-07-04 | 2017-08-29 | 红豆电信有限公司 | Power circuit |
| CN107104492B (en) * | 2017-07-04 | 2023-08-22 | 红豆电信有限公司 | Power supply circuit |
| WO2019047434A1 (en) * | 2017-09-11 | 2019-03-14 | 深圳易马达科技有限公司 | Charging circuit and charging device |
| CN108832679A (en) * | 2018-06-25 | 2018-11-16 | 吉林工程技术师范学院 | Electric car DC charging machine control system |
| CN109031097A (en) * | 2018-07-25 | 2018-12-18 | 天地融电子（天津）有限公司 | A kind of chip-detecting apparatus |
| CN113489114A (en) * | 2021-08-03 | 2021-10-08 | 广东友电新能源科技有限公司 | Charging control circuit, charging control method and charging device |
| CN113489114B (en) * | 2021-08-03 | 2022-07-19 | 广东友电新能源科技有限公司 | Charging control circuit, charging control method and charging device |
| CN113629813A (en) * | 2021-08-13 | 2021-11-09 | 瀚昕微电子(无锡)有限公司 | Charging equipment |
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Application publication date: 20100616 |