CN101110523A - Control method for implementing constant-current charging of battery - Google Patents
Control method for implementing constant-current charging of battery Download PDFInfo
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- CN101110523A CN101110523A CNA2006101034053A CN200610103405A CN101110523A CN 101110523 A CN101110523 A CN 101110523A CN A2006101034053 A CNA2006101034053 A CN A2006101034053A CN 200610103405 A CN200610103405 A CN 200610103405A CN 101110523 A CN101110523 A CN 101110523A
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Abstract
The present invention discloses a control method to realize constant current battery charging, which comprises following procedures. Firstly, constant current charging is started. An input voltage of a power adjustment tube and a battery voltage are detected. Current grade for constant current charging is set. As the battery voltage achieves a voltage threshold of the constant current charging, the set current of the constant current charging is utilized to charge the battery and the battery voltage gradually increases. As the battery voltage is lower than a voltage of constant current charging completion, the battery is continuously charged. Otherwise, the constant current charging is finished. As a product of a difference between the input voltage of the power adjustment tube and the battery voltage with a present current grade of constant current charging is less than a set power consumption threshold of the power adjustment tube at the present current grade, the present constant current charging is kept. Otherwise, the charging current is increased until the charging is finished. The method shortens charging time, ensures the power consumption in the circuit power adjustment tube not more than a set value, protects the power adjustment tube and improves circuit operation reliability.
Description
Technical field
The present invention relates to a kind of control method of constant-current charging of battery, specifically in constant current charge stage of battery, be not with one fixedly the constant current charge electric current battery is charged, but adjust the constant current charge electric current according to the change dynamics of battery charging voltage, be characterized in, taken into account the reliability of charging interval and circuit working simultaneously.
Background technology
Along with popularizing of mobile electronic devices such as mobile phone, MP3, by the computer USB interface mobile phone, MP3 being charged becomes a more and more general application.Because the USB power supply is the voltage stabilizing output current, nominal value is 5V, and maximum current is 500mA.Charging process as lithium ion battery is divided into trickle, constant current, pulse three phases.
For electronic equipment with USB interface charge function, an electric current, voltage control path are arranged in its charging circuit, when constant current charge, need this partial circuit to realize regulating, because the constant-voltage characteristic of usb circuit, if constant current charge electric current one regularly, when cell voltage is low, pressure reduction is bigger, the power that consumption is adjusted on the power tube at regulating circuit can be bigger, and after battery is charged to a certain degree, when voltage raises the back, pressure reduction diminishes, and consumes the power of adjusting on the power tube at regulating circuit and diminishes.
For a specific power tube,, just there is the possibility of damaging power tube if surpass the power consumption value.When the constant current charge current settings is too small, will prolong the charging interval of battery, when the constant current charge current settings is excessive, when cell voltage is low, may cause the damage of adjusting power tube.Shorten the battery charge time, can improve the satisfaction of user product.So, want to shorten the charging interval under the prerequisite of product reliability guaranteeing, very big meaning is just arranged.
Summary of the invention
The present invention proposes a kind of method of dynamic adjustment constant-current charging of battery electric current, when cell voltage is low, with less constant current charge electric current, when cell voltage is higher, use bigger constant current charge electric current, the power that guarantees to consume on the adjustment power tube is less than its rated value, improve the reliability of circuit, shortened the charging interval of battery simultaneously, the present invention is suitable for having the constant current charge stage of all battery charging process of constant current charge process.
The method of the invention is as follows to the concrete controlled step in constant-current charging of battery stage:
A kind of method that realizes constant-current charging of battery control comprises the steps:
The first step, the beginning constant current charge detects the adjustment power tube input voltage and the cell voltage of input, and sets constant current charge electric current progression;
Second step, when cell voltage reaches the voltage threshold of constant current charge, battery is charged with the constant current charge electric current of having set, cell voltage uprises gradually;
The 3rd step, when cell voltage less than the constant-current charging of battery end voltage, then enter next step, proceed constant current charge, otherwise constant current charge finishes;
The 4th step, when the product of the constant current charge electric current of the difference of the input voltage of adjusting power tube and cell voltage and current progression during less than the adjustment power tube power consumption setting thresholding of current progression, then continue to keep the capable charging of current constant current charge electric current, otherwise increase charging current, proceed charging;
In the 5th step, constant current charge finishes.
The control method in this constant-current charging of battery stage, compare with charging method in the past and to have following outstanding feature:
By the constant current charge electric current is dynamically adjusted, when shortening the charging interval, guarantee that the power consumption of adjusting power tube in the circuit is no more than rated value, protected the adjustment power tube, improved the reliability of circuit working.
Description of drawings
Fig. 1 is a constant current charge control method flow chart of the present invention;
Fig. 2 is the work system schematic diagram of the method for the invention.
Embodiment
Embodiment to the method for the invention is elaborated in conjunction with the accompanying drawings, and wherein, each parameter symbol is defined as follows:
Vin adjusts the power tube input voltage;
The Vbat cell voltage;
Vend constant-current charging of battery end voltage;
The Ich battery charge;
Ich[n] n level battery charge current value, n=1 wherein, 2,3..., Ich[n]＜Ich[n+1];
Wt adjusts the power tube rated value;
Ws adjusts the power tube power consumption and sets thresholding;
Ws[n] the n level adjusts the power tube power consumption and sets thresholding, n=1 wherein, 2,3 ..., Ws[n]≤Wt.
The concrete course of work of the method for the invention is referring to Fig. 1, and the detailed course of work is as follows:
The first step: when cell voltage Vbat reaches the voltage threshold of constant current charge, use less current Ich[1] battery is carried out Constant Electric Current compress into row charging, cell voltage Vbat uprises gradually;
If Vbat＜Vend proceeds constant current charge, otherwise constant current charge finishes;
If Ich[1] * (Vin-Vbat)＜Ws[1] time, then continue to keep Ich[1] charging current charge, otherwise increase charging current, with Ich[2] charging current charge;
Second step: the electric current I ch[2] battery is carried out constant current charge, Vbat uprises gradually;
If Vbat＜Vend proceeds constant current charge, otherwise constant current charge finishes;
If Ich[2] * (Vin-Vbat)＜Ws[2] time, then continue to keep Ich[2] charging current charge, otherwise increase charging current, with Ich[3] charging current charge;
The charging process of back by that analogy.
The n step: electric current I ch[n] battery is carried out constant current charge, Vbat uprises gradually.
If Vbat＜Vend proceeds constant current charge, otherwise constant current charge finishes.
If Ich[n] * (Vin-Vbat)＜Ws[n] time, then continue to keep Ich[n] charging current charge, otherwise increase charging current, with Ich[n+1] charging current charge.
The setting of constant current charge electric current progression is decided on concrete application, finishes until the constant current charge process.
Control method involved in the present invention, its work system schematic diagram is made of following several parts generally referring to Fig. 2: adjust power tube, input supply voltage testing circuit, battery voltage detection circuit, charging current detection sample circuit, charging control circuit, constant current charge current setting circuit.
Control to constant current charge stage of battery is key of the present invention, can adjust the size of charging current according to input voltage, battery charging voltage change dynamics, when shortening the charging interval, thereby guarantees that the power of adjusting on the power tube meets the requirements as far as possible.Charging current is provided with the circuit and the charging circuit of part and can realizes with pure hardware circuit, also can add the flush bonding processor circuit and realize control, and concrete realization circuit can be realized flexibly according to the applicable cases of reality.
Adjust power tube in the charging current major loop, the combined charge control circuit is realized the corrective action of the various charging forms of battery, as constant current charge, constant voltage charge etc.It generally is a pliotron; also may realize with other modes; in the constant current charge process; to there be a large amount of power consumptions adjusting on the power tube; if the long-time overrate of power tube; will cause the damage of power tube, purpose of the present invention will be protected the adjustment power tube exactly effectively.
The input supply voltage testing circuit is realized input supply voltage is detected, obtain Vin, in charging process, Vin may be a constant value, also may not be a constant value, Vin be on the one hand as the enter factor of charging control circuit, also as the enter factor of continuous current initialization circuit, if control with flush bonding processor in the physical circuit, then available A/D circuit is realized the sampling to Vin.
Battery voltage detection circuit is realized the detection to supply voltage, obtains Vbat, and in charging process, Vbat can uprise gradually along with the charging interval.As the enter factor of charging control circuit, also as the enter factor of continuous current initialization circuit, if control with flush bonding processor in the physical circuit, then available A/D circuit is realized the sampling to Vbat to Vbat on the one hand.
The charging current sample circuit is realized charging current is detected, and obtains Ich, mainly as the enter factor of charging control circuit, also can be used as the enter factor of continuous current initialization circuit simultaneously.
The charging current testing circuit can add the differential amplifier realization with a sampling resistor, can realize that also if control with flush bonding processor in the physical circuit, then available A/D circuit is realized the sampling to Ich with other circuit mode.
Charging control circuit is realized the charging Whole Process Control of battery, has comprised the constant current charge stage.
The Vin that the constant current charge current setting circuit obtains according to sampling, Vbat give and to close Ich[n], Ws[n], the occurrence of design charging current Ich.When if concrete circuit is controlled with flush bonding processor, then can obtain the value of Vin, Vbat by the A/D circuit, just can determine Ich by calculating, the set point of Ich is set in the control circuit goes.
Claims (3)
1. a method that realizes constant-current charging of battery control is characterized in that, comprises the steps:
The first step, the beginning constant current charge detects the adjustment power tube input voltage and the cell voltage of input, and sets constant current charge electric current progression;
Second step, when cell voltage reaches the voltage threshold of constant current charge, battery is charged with the constant current charge electric current of having set, cell voltage uprises gradually;
The 3rd step, when cell voltage less than the constant-current charging of battery end voltage, then enter next step, proceed constant current charge, otherwise constant current charge finishes;
The 4th step, when the product of the constant current charge electric current of the difference of the input voltage of adjusting power tube and cell voltage and current progression during less than the adjustment power tube power consumption setting thresholding of current progression, then continue to keep the capable charging of current constant current charge electric current, otherwise increase charging current, proceed charging;
In the 5th step, constant current charge finishes.
2. control method as claimed in claim 1 is characterized in that:
The setting of constant current charge electric current progression is decided on concrete application, finishes until the constant current charge process.
3. control method as claimed in claim 1 or 2 is characterized in that:
Described constant current charge electric current can calculate by adjustment power tube input voltage and the cell voltage that sampling obtains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101034053A CN101110523A (en) | 2006-07-18 | 2006-07-18 | Control method for implementing constant-current charging of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101034053A CN101110523A (en) | 2006-07-18 | 2006-07-18 | Control method for implementing constant-current charging of battery |
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| CN101110523A true CN101110523A (en) | 2008-01-23 |
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| CNA2006101034053A Pending CN101110523A (en) | 2006-07-18 | 2006-07-18 | Control method for implementing constant-current charging of battery |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924383A (en) * | 2010-08-17 | 2010-12-22 | 惠州Tcl移动通信有限公司 | Mobile terminal of automatically setting charging current and implementation method thereof |
| CN102082458A (en) * | 2010-12-31 | 2011-06-01 | 易事特电力***技术有限公司 | Inverter intelligent charging control method |
| CN102931693A (en) * | 2011-08-10 | 2013-02-13 | 联发科技（新加坡）私人有限公司 | Battery charging control method and device and charging system and portable device. |
| CN103872709A (en) * | 2012-12-10 | 2014-06-18 | 联想(北京)有限公司 | Charging method and electronic device |
| CN106063077A (en) * | 2014-01-28 | 2016-10-26 | 广东欧珀移动通信有限公司 | Power adapter and terminal |
| CN107863808A (en) * | 2017-12-11 | 2018-03-30 | 深圳锐源微电子科技有限公司 | The charge control method and device of a kind of mobile terminal |
-
2006
- 2006-07-18 CN CNA2006101034053A patent/CN101110523A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924383A (en) * | 2010-08-17 | 2010-12-22 | 惠州Tcl移动通信有限公司 | Mobile terminal of automatically setting charging current and implementation method thereof |
| CN101924383B (en) * | 2010-08-17 | 2014-03-19 | 惠州Tcl移动通信有限公司 | Mobile terminal of automatically setting charging current and implementation method thereof |
| CN102082458A (en) * | 2010-12-31 | 2011-06-01 | 易事特电力***技术有限公司 | Inverter intelligent charging control method |
| CN102931693A (en) * | 2011-08-10 | 2013-02-13 | 联发科技（新加坡）私人有限公司 | Battery charging control method and device and charging system and portable device. |
| CN102931693B (en) * | 2011-08-10 | 2014-12-10 | 联发科技（新加坡）私人有限公司 | Battery charging control method and device and charging system and portable device. |
| CN103872709A (en) * | 2012-12-10 | 2014-06-18 | 联想(北京)有限公司 | Charging method and electronic device |
| CN106063077A (en) * | 2014-01-28 | 2016-10-26 | 广东欧珀移动通信有限公司 | Power adapter and terminal |
| CN106063077B (en) * | 2014-01-28 | 2018-09-04 | 广东欧珀移动通信有限公司 | Power supply adaptor and terminal |
| CN107863808A (en) * | 2017-12-11 | 2018-03-30 | 深圳锐源微电子科技有限公司 | The charge control method and device of a kind of mobile terminal |
| CN107863808B (en) * | 2017-12-11 | 2021-01-01 | 深圳锐源微电子科技有限公司 | Charging control method and device for mobile terminal |
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