CN201629584U - Constant-current and constant-voltage charging circuit - Google Patents
Constant-current and constant-voltage charging circuit Download PDFInfo
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- CN201629584U CN201629584U CN2009202454709U CN200920245470U CN201629584U CN 201629584 U CN201629584 U CN 201629584U CN 2009202454709 U CN2009202454709 U CN 2009202454709U CN 200920245470 U CN200920245470 U CN 200920245470U CN 201629584 U CN201629584 U CN 201629584U
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Abstract
The utility model relates to a constant-current and constant-voltage charging circuit, which comprises a storage battery, a switch booster circuit and a detecting circuit, wherein the detecting circuit is connected into the switch booster circuit and used for detecting charging current and voltage of the storage battery. The constant-current and constant-voltage charging circuit amplifies detecting signals of voltage and current of the storage battery, overlaps the detecting signals through a first isolating diode D1 and a second isolating diode D2, and forms control signals To-Fb of the switch booster power so as to control feedback quantity of the switch booster circuit, thereby regulating charging voltage of the storage battery, and realizing constant-flow and constant-voltage charging for the storage battery with large capacity and high voltage.
Description
Technical field
The utility model relates to a kind of charging circuit, specifically is a kind of constant current, constant voltage charging circuit.
A lot of electric energy storage devices are when low-voltage state, and charging current can be very big, if do not add restriction, then can damage charging device; If charging voltage surpasses the voltage limit of electric energy storage device in addition, then can damage electric energy storage device.In order to allow the electric energy storage device quick charge, when equipment is in low-voltage state, generally adopt current constant mode to charge; When the voltage of electric energy storage device during near deboost, generally adopt the constant voltage mode to charge, make the equipment attitude that reaches capacity.
Existing charging chip and circuit mainly design at battery, and its deboost and charging current are only effective within the specific limits, when selecting big capacity, high-tension electric energy storage device for use, are difficult to suitable charging circuit.
The purpose of this utility model is to solve the problem that existing charging circuit can not satisfy the charging demand of big capacity, high voltage installation.
In order to solve the problems of the technologies described above, it is a kind of simple that the utility model provides, be fit to big capacity, the charging circuit of high-tension electric energy storage device charging, it specifically is a kind of constant current, constant voltage charging circuit, comprise electric storage means, the boost switching circuit and insert this boost switching circuit be used to detect the electric current of electric storage means and the testing circuit of voltage, its special character is that described testing circuit comprises the first integrated operational amplifier U1A, the second integrated operational amplifier U1B, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, current sense resistor Rsen, the first isolating diode D1, the second isolating diode D2, protection diode D3, discharge diode D4, first capacitor C 1 and second capacitor C 2;
Described first resistance R, 1 one terminations are gone into the in-phase input end of the first integrated operational amplifier U1A, and the other end is connected in series to electric storage means one end;
Described second resistance R 2 be serially connected in and the in-phase input end of the first integrated operational amplifier U1A between;
Described the 3rd resistance R 3 be serially connected in and the inverting input of the first integrated operational amplifier U1A between;
Described the 4th resistance R 4 be serially connected in and the inverting input of the second integrated operational amplifier U1B between;
Described the 5th resistance R 5 is serially connected between the inverting input and first capacitor C, 1 one ends of the first integrated operational amplifier U1A;
The positive pole of the described first isolating diode D1 inserts the output of the first integrated operational amplifier U1A, and its negative pole is connected to first capacitor C, 1 one ends;
Described the 6th resistance R 6 is serially connected between the inverting input and first capacitor C, 1 one ends of the second integrated operational amplifier U1B;
The positive pole of the described second isolating diode D2 inserts the output of the second integrated operational amplifier U1B, and its negative pole is connected to first capacitor C, 1 one ends;
Described the 7th resistance R 7 and 1 parallel connection of first capacitor C, and the 7th resistance R 7 one ends and first capacitor C, 1 other end ground connection;
Described the 8th resistance R 8 and current sense resistor Rsen are serially connected between the in-phase input end and ground of the second integrated operational amplifier U1B successively;
Described second capacitor C 2 is serially connected between the in-phase input end and ground of the second integrated operational amplifier U1B;
The positive pole of described protection diode D3 is connected to the node of the 8th resistance R 8 and current sense resistor Rsen, and its negative pole is connected to the electric storage means other end;
The positive pole of described discharge diode D4 is connected to the electric storage means other end, its minus earth.
And note that if the parameter of the components and parts of above that description is had requirement, should provide parameter range and the optimum parameter value in the scope also so.
Because constant current of the present utility model, constant voltage charging circuit, by with the detection signal of the voltage of electric storage means, electric current through after amplifying, by superposeing behind the first isolating diode D1 and the second isolating diode D2, and the control signal To Fb of formation boost switching power supply, and then the feedback quantity of control boosted switch circuit, thereby the charging voltage to electric storage means is regulated, and realizes constant current, constant voltage charge to big capacity, high-tension electric storage means.
Fig. 1 is constant current of the present utility model, constant voltage charging circuit schematic diagram;
Fig. 2 is a testing circuit schematic diagram of the present utility model.
Embodiment
Referring to Fig. 1, constant current of the present utility model, constant voltage charging circuit mainly comprise boosted switch circuit 1 and insert the electric current that is used to detect electric storage means of this boosted switch circuit 1, the testing circuit 2 of voltage.
Referring to Fig. 2, the composition and the electrical connection thereof of testing circuit 2 of the present utility model are:
First resistance R, 1 one terminations are gone into the in-phase input end of the first integrated operational amplifier U1A, and the other end is connected in series to electric storage means one end;
The 3rd resistance R 3 be serially connected in and the inverting input of the first integrated operational amplifier U1A between;
The 4th resistance R 4 be serially connected in and the inverting input of the second integrated operational amplifier U1B between;
The 5th resistance R 5 is serially connected between the inverting input and first capacitor C, 1 one ends of the first integrated operational amplifier U1A;
The positive pole of the first isolating diode D1 inserts the output of the first integrated operational amplifier U1A, and its negative pole is connected to first capacitor C, 1 one ends;
The 6th resistance R 6 is serially connected between the inverting input and first capacitor C, 1 one ends of the second integrated operational amplifier U1B;
The positive pole of the second isolating diode D2 inserts the output of the second integrated operational amplifier U1B, and its negative pole is connected to first capacitor C, 1 one ends;
The 7th resistance R 7 and 1 parallel connection of first capacitor C, and the 7th resistance R 7 one ends and first capacitor C, 1 other end ground connection;
The 8th resistance R 8 and current sense resistor Rsen are serially connected between the in-phase input end and ground of the second integrated operational amplifier U1B successively;
The positive pole of protection diode D3 is connected to the node of the 8th resistance R 8 and current sense resistor Rsen, and its negative pole is connected to the electric storage means other end;
The positive pole of discharge diode D4 is connected to the electric storage means other end, its minus earth.
Charging current detects and the heavy-current discharge part:
When electric storage means was charged, electric current flowed to the ground GND of system by protection diode D3, current sense resistor Rsen, and electric current can appear at the two ends of current sense resistor Rsen with the form of voltage.
When electric storage means was discharged, electric current flowed to electric storage means ground GndCell by discharge diode D4 from the ground GND of system.Electric current when discharging like this only is subject to discharge diode D4, and can not damage current sense resistor Rsen.
Referring to Fig. 2, constant current, constant-voltage control circuit are made up of voltage detecting circuit 3 and current detection circuit 4,
The voltage of the anodal Vcell of electric storage means, by being added to the in-phase input end of the first integrated operational amplifier U1A after first resistance R 1, second resistance R, 2 dividing potential drops, after the first integrated operational amplifier U1A amplifies, by the first isolating diode D1, feed back to the reverse input end of the first integrated operational amplifier U1A and U1B again;
The electric current of electric storage means is added to the in-phase input end of the second integrated operational amplifier U1B after by the 8th resistance R 8,2 filtering of second capacitor C, by the second isolating diode D2, feeds back to the reverse input end of the second integrated operational amplifier U1A and U1B after amplifying;
Above-mentioned superposes after the electric storage means voltage after the amplification, electric storage means current signal are by isolating diode D1, D2, form the control signal To_Fb of boosted switch circuit 1, and then the feedback quantity of control boosted switch circuit 1, thereby carry out the adjusting of charging voltage, reach the purpose of constant current, constant voltage charge.
This circuit adjustment implementation is divided two stages:
1, constant-current phase: charging current increases, and the voltage at Rsen two ends can increase, and U1B amplifies this signal, and control signal To_Fb increases, and when booster circuit detects the increase of To_Fb signal, can turn down the magnitude of voltage of output, and charging current is reduced; Otherwise when charging current reduced, through above-mentioned feedback procedure, the output voltage of booster circuit can increase, and charging current then increases.
By the control of above-mentioned feedback circuit, charging current can be constant in the scope of setting.
2, constant-voltage phase: when the voltage at electric storage means two ends was higher than deboost, U1A amplified voltage signal, and control signal To_Fb increases, and booster circuit can be turned down output voltage; Otherwise when the voltage at electric storage means two ends reduced, the output voltage of booster circuit can increase, and made the voltage at electric storage means two ends reach the deboost of setting.
Claims (1)
1. constant current, constant voltage charging circuit, comprise electric storage means, the charging current that is used to detect electric storage means of boost switching circuit and this boost switching circuit of access, the testing circuit of voltage is characterized in that: described testing circuit comprises the first integrated operational amplifier U1A, the second integrated operational amplifier U1B, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, current sense resistor Rsen, the first isolating diode D1, the second isolating diode D2, protection diode D3, discharge diode D4, first capacitor C 1 and second capacitor C 2;
Described first resistance R, 1 one terminations are gone into the in-phase input end of the first integrated operational amplifier U1A, and the other end is connected in series to electric storage means one end;
Described second resistance R 2 be serially connected in and the in-phase input end of the first integrated operational amplifier U1A between;
Described the 3rd resistance R 3 be serially connected in and the inverting input of the first integrated operational amplifier U1A between;
Described the 4th resistance R 4 be serially connected in and the inverting input of the second integrated operational amplifier U1B between;
Described the 5th resistance R 5 is serially connected between the inverting input and first capacitor C, 1 one ends of the first integrated operational amplifier U1A;
The positive pole of the described first isolating diode D1 inserts the output of the first integrated operational amplifier U1A, and its negative pole is connected to first capacitor C, 1 one ends;
Described the 6th resistance R 6 is serially connected between the inverting input and first capacitor C, 1 one ends of the second integrated operational amplifier U1B;
The positive pole of the described second isolating diode D2 inserts the output of the second integrated operational amplifier U1B, and its negative pole is connected to first capacitor C, 1 one ends;
Described the 7th resistance R 7 and 1 parallel connection of first capacitor C, and the 7th resistance R 7 one ends and first capacitor C, 1 other end ground connection;
Described the 8th resistance R 8 and current sense resistor Rsen are serially connected between the in-phase input end and ground of the second integrated operational amplifier U1B successively;
Described second capacitor C 2 is serially connected between the in-phase input end and ground of the second integrated operational amplifier U1B;
The positive pole of described protection diode D3 is connected to the node of the 8th resistance R 8 and current sense resistor Rsen, and its negative pole is connected to the electric storage means other end;
The positive pole of described discharge diode D4 is connected to the electric storage means other end, its minus earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202454709U CN201629584U (en) | 2009-11-27 | 2009-11-27 | Constant-current and constant-voltage charging circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202454709U CN201629584U (en) | 2009-11-27 | 2009-11-27 | Constant-current and constant-voltage charging circuit |
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| Publication Number | Publication Date |
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| CN201629584U true CN201629584U (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202454709U Expired - Fee Related CN201629584U (en) | 2009-11-27 | 2009-11-27 | Constant-current and constant-voltage charging circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734265A (en) * | 2013-12-24 | 2015-06-24 | 华硕电脑股份有限公司 | Battery charging circuit and battery charging method |
| CN105382880A (en) * | 2015-10-22 | 2016-03-09 | 上海电机学院 | Conveying belt cutting device |
| CN106527430A (en) * | 2016-11-04 | 2017-03-22 | 南京理工大学 | General automatic-guided transport vehicle control system |
-
2009
- 2009-11-27 CN CN2009202454709U patent/CN201629584U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734265A (en) * | 2013-12-24 | 2015-06-24 | 华硕电脑股份有限公司 | Battery charging circuit and battery charging method |
| CN105382880A (en) * | 2015-10-22 | 2016-03-09 | 上海电机学院 | Conveying belt cutting device |
| CN105382880B (en) * | 2015-10-22 | 2017-05-10 | 上海电机学院 | Conveying belt cutting device |
| CN106527430A (en) * | 2016-11-04 | 2017-03-22 | 南京理工大学 | General automatic-guided transport vehicle control system |
| CN106527430B (en) * | 2016-11-04 | 2019-08-23 | 南京理工大学 | Universal automated guided vehicle control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: XI AN KEYWAY TECHNOLOGY CO., LTD. Free format text: FORMER NAME: XI AN QIVI TEST + CONTROL TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 710077 Xi'an high tech Zone, Jin Industrial Road, No., No. C Venture Park, No. 8, Patentee after: Xi'an Keyway Technology Co.,Ltd. Address before: 710077 Xi'an high tech Zone, Jin Industrial Road, No., No. C Venture Park, No. 8, Patentee before: Xi'an Qivi Test & Control Technology Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20121127 |