CN102412610B - Linear-charging circuit and intelligent charging method thereof - Google Patents
Linear-charging circuit and intelligent charging method thereof Download PDFInfo
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- CN102412610B CN102412610B CN 201110399158 CN201110399158A CN102412610B CN 102412610 B CN102412610 B CN 102412610B CN 201110399158 CN201110399158 CN 201110399158 CN 201110399158 A CN201110399158 A CN 201110399158A CN 102412610 B CN102412610 B CN 102412610B
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Abstract
The invention discloses an efficient linear circuit charging method, which is characterized by comprising the following steps: detecting the input end voltage Va and the output end voltage Vb of a linear charging circuit, and feeding back to a power supply management unit; detecting temperature information T and feeding back to the power supply management unit; and setting the charging current Ic according to the information (Va, Vb and T) fed back in real time by the detection circuit by the power supply management unit. At the same time, the invention discloses a particular circuit structure applied to the charging method. The circuit structure comprises the linear charging circuit, the power supply management unit, a first detection circuit, a second detection circuit, a third detection circuit and a temperature detection circuit; and the charging current is regulated dynamically according to parameters detected in real time, thus the charging circuit is charged always with the bearable maximal current, and the charging time is shortened effectively.
Description
Technical field
The present invention relates to a kind of linear-charging circuit and intelligent charging method thereof.
Background technology
The linear-charging circuit is because circuit is simple, characteristics such as easy realization, in the charging circuit of portable electric appts, be used widely, but the caloric value when its distinct disadvantage is work is bigger, the charging circuit that might cause of excessive temperature burns, so general linear-charging circuit all is provided with the peak power restriction, thereby controls its caloric value.For reaching this requirement, and support certain charge voltage range, the charging current of linear-charging circuit often arranges smallerly.Existing scheme is maximum charging voltage Vamax, CC charging stage battery minimum voltage Vbmin and the intrinsic peak power Pmax of charging circuit that supports according to circuit, utilizes formula
Calculate charging current I.But its shortcoming is charging current and fixes, and less than the safe charging electric current I max that charging circuit can bear, so just can not take full advantage of the maximum firm power that charging circuit can bear, and makes the time of charging prolong greatly.
Summary of the invention
The present invention's first purpose is to propose a kind of charging method of linear circuit efficiently, dynamically adjusts current charging current according to the parameter of real-time detection, makes charging circuit charge with the maximum current that can bear all the time, shortens the charging interval effectively.
A kind of intelligent charging method of linear-charging circuit is characterized in that this method is as follows:
Detect linear charging circuit input terminal voltage Va and output end voltage Vb;
Detect the temperature information T of linear charging circuit;
According to real-time feedack Va, Vb, T, current charging current Ic is set;
Detect linear charging circuit output end current Ib, if Ib is lower than certain definite value and then disconnects charge power supply, if Ib then continues charging more than or equal to this definite value, and repeat aforesaid operations.Wherein, described definite value is the threshold values of setting in the Power Management Unit that is used for judging whether to satisfy outage condition, and this value generally between 100 to 200 milliamperes, is also decided by the demand of physical circuit.
When current charging current Ic is set, according to formula
Calculate maximum chargeable electric current I, and with I and Imax comparison, if I then is made as current charging current Ic with the Imax value more than or equal to Imax, if I then is made as current charging current Ic with the I value less than Imax, wherein, the maximum charging current that Imax allows for the linear-charging circuit, P (T) can bear power for the corresponding charging circuit of operating ambient temperature T.
The present invention's intelligent charging method has following advantage:
Increased the detection to temperature parameter, guarantee that the linear-charging circuit is in safe working temperature, reduce the too high and risk of burning of circuit Yin Wendu greatly, and dynamic adjustments charging current Ic makes it be in the maximum of safe range all the time, shorten the charging interval effectively, improve charge efficiency.
Another object of the present invention is to propose a kind of linear-charging circuit that adopts above-mentioned intelligent charging method, it is characterized in that: described linear-charging circuit correspondence is provided with Power Management Unit, first testing circuit, second testing circuit, three testing circuit and temperature sensing circuit.
Described linear-charging circuit input end connects power end, output connects battery, it also is provided with a control end, be electrically connected with described Power Management Unit output, described Power Management Unit sends corresponding control signal by the output to the linear-charging circuit, by the inner resistance of linear adjustment charging circuit, make the corresponding change of charging current Ic.
Described first testing circuit is serially connected with between linear-charging circuit output end and the battery, and output connects the Power Management Unit first input end, for detection of linear-charging circuit output end current Ib, and feeds back to Power Management Unit.Power Management Unit detects linear charging circuit output end current Ib by testing circuit, if Ib is lower than certain definite value and then disconnects charge power supply, if Ib then continues charging more than or equal to this definite value.Wherein, described definite value is the threshold values of setting in the Power Management Unit that is used for judging whether to satisfy outage condition, and this value generally between 100 to 200 milliamperes, is also decided by the demand of physical circuit.
The described second testing circuit input is electrically connected with the linear-charging circuit input end, and output connects Power Management Unit second input, for detection of the voltage Va of linear-charging circuit input end, and feeds back to Power Management Unit.
Described three testing circuit input is electrically connected with the linear-charging circuit output end, and its output connects Power Management Unit the 3rd input, for detection of the voltage Vb of linear-charging circuit output end, and feeds back to Power Management Unit.
Described temperature sensing circuit includes temperature sensor, and its output connects the Power Management Unit four-input terminal, for detection of the work temperature of linear-charging circuit, and feeds back to Power Management Unit.
Described Power Management Unit is utilized formula according to the real-time feedack Va of testing circuit, Vb, T
Calculate maximum chargeable electric current I, and I and Imax are compared, if I then is made as current charging current Ic with the Imax value more than or equal to Imax, if I then is made as current charging current Ic with the I value less than Imax.Wherein, P (T) can bear power for the corresponding charging circuit of operating ambient temperature T, and Va is the magnitude of voltage of charging circuit input, and Vb is the magnitude of voltage of charging circuit output, the maximum charging current that Imax allows for the linear-charging circuit.
The present invention's linear-charging circuit has following advantage:
Increased temperature sensing circuit, guarantee that the linear-charging circuit is in safe working temperature, reduce the too high and risk of burning of circuit Yin Wendu greatly, and data computation charging current and the dynamic adjustments of utilizing each testing circuit to present, make it be in the maximum of safe range all the time, shorten the charging interval effectively, improve charge efficiency.
As a kind of improvement of such scheme, also be serially connected with an overvoltage protection IC between described power end and the linear-charging circuit input end, prevent that the linear-charging circuit from burning because input voltage is too high, ensures the safety of linear charging circuit.
Figure of description
Fig. 1 is the circuit structure block diagram of prior art scheme.
Fig. 2 is the process chart of prior art scheme.
Fig. 3 is the present invention's circuit structure block diagram.
Fig. 4 is the present invention's process chart.
Embodiment
Now according to Fig. 1 to Fig. 4 the present invention's embodiment is described below:
To shown in Figure 2, the prior art scheme: comprise linear-charging circuit 1, its input a connects power end 2, and output b is connected with battery 3, and described linear-charging circuit also is provided with a control end c, is connected with Power Management Unit 4 as Fig. 1.
Between linear charging circuit output b and battery 3, also be serially connected with first testing circuit 5, the output of described first testing circuit 5 connects the first input end of Power Management Unit 4, for detection of linear-charging circuit output end current Ib, if Ib is lower than certain definite value and then disconnects charge power supply, charging finishes; If Ib then continues charging more than or equal to this definite value.This value generally between 100 to 200 milliamperes, is also decided by the demand of physical circuit.
As a kind of improvement of such scheme, also be connected in series between described power end 2 and the linear-charging circuit 1 input a and establish an overvoltage protection IC.
To shown in Figure 4, the present invention has additional second testing circuit 6, three testing circuit 7 and temperature sensing circuit 8 on the basis of existing scheme, is used to Power Management Unit that real-time detection data are provided, to calculate charging current Ic as Fig. 3.
Described second testing circuit, 6 inputs are electrically connected with the input a of linear-charging circuit 1, and output connects Power Management Unit 4 second inputs, for detection of the voltage Va of linear-charging circuit input end, and feeds back to Power Management Unit.
Described three testing circuit 7 inputs are electrically connected with the output b of linear-charging circuit 1, and its output connects Power Management Unit 4 the 3rd input, for detection of the voltage Vb of linear-charging circuit output end, and feeds back to Power Management Unit.
Described temperature sensing circuit 8 includes temperature sensor, and its output connects Power Management Unit 4 four-input terminals, for detection of the work temperature of linear-charging circuit, and feeds back to Power Management Unit.
Described Power Management Unit is utilized formula according to the real-time feedack Va of testing circuit, Vb, T
Calculate maximum chargeable electric current I, and I and Imax are compared, if I then is made as current charging current Ic with the Imax value more than or equal to Imax, if I then is made as current charging current Ic with the I value less than Imax.Wherein, P (T) can bear power for the corresponding charging circuit of operating ambient temperature T, and Va is the magnitude of voltage of charging circuit input, and Vb is the magnitude of voltage of charging circuit output, the maximum charging current that Imax allows for the linear-charging circuit.
Described Power Management Unit 4 sends corresponding control signal by the control end c to linear-charging circuit 1, by the inner resistance of linear adjustment charging circuit, makes the corresponding change of charging current Ic.
Such scheme does not limit the present invention with this for the present invention's preferred embodiments.Every application the present invention's method is approximate or identical, is the improvement that make on the basis again or with the present invention's circuit, all belongs to the scope of this patent protection.
Claims (3)
1. the intelligent charging method of a linear-charging circuit is characterized in that this method is as follows:
Detect linear charging circuit input terminal voltage Va and output end voltage Vb;
Detect the temperature information T of linear charging circuit;
According to real-time feedack Va, Vb, T, current charging current Ic is set;
Detect linear charging circuit output end current Ib, if Ib is lower than certain definite value and then disconnects charge power supply, if Ib then continues charging more than or equal to this definite value, and repeat aforesaid operations;
When current charging current Ic is set, earlier according to formula
Calculate maximum chargeable electric current I, then I and Imax are compared, if I then is made as current charging current Ic with the Imax value more than or equal to Imax, if I then is made as current charging current Ic with the I value less than Imax; Wherein, the maximum charging current that Imax allows for the linear-charging circuit, P (T) can bear power for the corresponding charging circuit of operating ambient temperature T.
2. linear-charging circuit, it is characterized in that: described linear-charging circuit also is provided with Power Management Unit, first testing circuit, second testing circuit, three testing circuit and temperature sensing circuit;
Described linear-charging circuit input end connects power end, and output connects battery, and it also is provided with a control end, is electrically connected with described Power Management Unit output;
Described first testing circuit is serially connected with between linear-charging circuit output end and the battery, and output connects the Power Management Unit first input end, for detection of linear-charging circuit output end current Ib, and feeds back to Power Management Unit;
The described second testing circuit input is electrically connected with the linear-charging circuit input end, and output connects Power Management Unit second input, for detection of the voltage Va of linear-charging circuit input end, and feeds back to Power Management Unit;
Described three testing circuit input is electrically connected with the linear-charging circuit output end, and its output connects Power Management Unit the 3rd input, for detection of the voltage Vb of linear-charging circuit output end, and feeds back to Power Management Unit;
Described temperature sensing circuit includes temperature sensor, and its output connects the Power Management Unit four-input terminal, for detection of the work temperature of linear-charging circuit, and feeds back to Power Management Unit;
Described Power Management Unit according to real-time feedack Va, Vb, T, arranges the current charging current Ic of linear-charging circuit, and disconnects charge power supply when the Ib of feedback is lower than certain definite value; When current charging current Ic is set, earlier according to formula
Calculate maximum chargeable electric current I, then I and Imax are compared, if I then is made as current charging current Ic with the Imax value more than or equal to Imax, if I then is made as current charging current Ic with the I value less than Imax; Wherein, the maximum charging current that Imax allows for the linear-charging circuit, P (T) can bear power for the corresponding charging circuit of operating ambient temperature T.
3. a kind of linear-charging circuit according to claim 2 is characterized in that: also be connected in series between described power end and the linear-charging circuit input end and be provided with an overvoltage protection IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110399158 CN102412610B (en) | 2011-12-05 | 2011-12-05 | Linear-charging circuit and intelligent charging method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110399158 CN102412610B (en) | 2011-12-05 | 2011-12-05 | Linear-charging circuit and intelligent charging method thereof |
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| CN102412610A CN102412610A (en) | 2012-04-11 |
| CN102412610B true CN102412610B (en) | 2013-07-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106558894A (en) * | 2015-09-29 | 2017-04-05 | 中兴通讯股份有限公司 | A kind of method and device for realizing charging |
| CN107437826B (en) | 2016-05-23 | 2020-12-04 | 华为终端有限公司 | Battery charging device, method, terminal, power adapter and storage medium |
| CN111193296B (en) * | 2018-11-15 | 2022-03-29 | 杭州海康机器人技术有限公司 | Pre-charging control device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1512619A (en) * | 2002-12-31 | 2004-07-14 | 广达电脑股份有限公司 | Two section type charging device |
| US6861824B1 (en) * | 2002-07-10 | 2005-03-01 | Arquesttechnology, Inc. | Charger system with dual-level current regulation and dual-level thermal regulation |
| CN101741119A (en) * | 2008-11-25 | 2010-06-16 | 半导体元件工业有限责任公司 | Multiple mode battery charger |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6861824B1 (en) * | 2002-07-10 | 2005-03-01 | Arquesttechnology, Inc. | Charger system with dual-level current regulation and dual-level thermal regulation |
| CN1512619A (en) * | 2002-12-31 | 2004-07-14 | 广达电脑股份有限公司 | Two section type charging device |
| CN101741119A (en) * | 2008-11-25 | 2010-06-16 | 半导体元件工业有限责任公司 | Multiple mode battery charger |
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| CN102412610A (en) | 2012-04-11 |
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Application publication date: 20120411 Assignee: VIVO MOBILE COMMUNICATION CO., LTD. Assignor: Guangdong Bubugao Electronic Industry Co., Ltd. Contract record no.: 2013440000551 Denomination of invention: Linear-charging circuit and intelligent charging method thereof Granted publication date: 20130710 License type: Exclusive License Record date: 20131231 |
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Application publication date: 20120411 Assignee: ACCO ELECTRONIC SCIENCE & TECHNOLOGY CO., LTD. Assignor: Guangdong Bubugao Electronic Industry Co., Ltd. Contract record no.: 2013440000551 Denomination of invention: Linear-charging circuit and intelligent charging method thereof Granted publication date: 20130710 License type: Exclusive License Record date: 20131223 |
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Application publication date: 20120411 Assignee: VIVO MOBILE COMMUNICATION CO., LTD. Assignor: Guangdong Bubugao Electronic Industry Co., Ltd. Contract record no.: 2013440000551 Denomination of invention: Linear-charging circuit and intelligent charging method thereof Granted publication date: 20130710 License type: Exclusive License Record date: 20131231 |
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