CN105207309A - Double-loop continuous control charging circuit control method - Google Patents
Double-loop continuous control charging circuit control method Download PDFInfo
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- CN105207309A CN105207309A CN201510701518.2A CN201510701518A CN105207309A CN 105207309 A CN105207309 A CN 105207309A CN 201510701518 A CN201510701518 A CN 201510701518A CN 105207309 A CN105207309 A CN 105207309A
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Abstract
The invention discloses a double-loop continuous control charging circuit control method. According to the control method, at a constant-current charging stage, the battery voltage does not reach a constant-current charging voltage value, a voltage loop control loop stabilizes the current set value of a current loop control loop at a constant-current charging current value; when the battery voltage reaches the constant-current charging voltage, a voltage loop controls the set current of a current loop to be reduced greatly, so that the charging voltage is stabilized at the set value all the time; when a battery discharges outwards at a constant-voltage charging stage, the voltage is lower than the constant-voltage charging voltage set value, the system returns to a constant-current charging stage under the control effect of the double loops, and the current is increased greatly to the constant-current charging current value on the basis of the current set value. The whole process is a continuous controllable adjusting process, and the phenomenon of frequent voltage jump caused by repeated switching between voltage loop control and current loop control does not occur.
Description
Technical field
The present invention relates to charging circuit, specifically a kind of control method of dicyclo continuous control charging circuit.
Background technology
Battery charging mode according to user in the market mainly contains two kinds, and one is off-line charging, as the pattern of battery vehicle charging; Another kind is online charging, as telecommunications room power supply charges to battery backup system.The output current of online charging power device is general all larger, requires to be greater than load current and battery charge sum, namely will charge the battery, also need to power to system load simultaneously.
Along with the application of battery in industry and commerce is more and more extensive, new battery applications gets more and more, and the daily load current of some application is little, but occasional needs the High-current output of short time.As some do the hard disk cabinet equipment of cold data record, most of hard disk only just can add electric operation when needs retrieval relevant information, and most time does not power up.So the daily electricity consumption of equipment is little, only just there is big current demand when there being burst Search Requirement.General pattern of wishing the online charging of backup battery employing in this type of application, now can only use high-power charge power supply, cost is high and energy conversion efficiency is low.
During by Switching Power Supply to secondary cell charge, generally have constant current charge and two stages of constant voltage charge at least.When constant voltage charge, increase suddenly the discharging current of battery, cell voltage is just likely unexpected lower than constant-voltage, and now charging circuit detects that cell voltage is lower than constant-voltage value, is just switched to constant current charging mode.Treat that battery discharge current reduces, voltage recovery, then switch back constant voltage mode.In two kinds of continuous handoff procedures of pattern, if can not ensure the continuity of charging current, and occur that charging current is suddenlyd change, system exports and just occurs larger voltage dithering.A lot of electronic device works current fluctuation is very large at present, if need in application to discharge to battery charging simultaneously, this problem is just easy to occur.
The key reason of this problem is that constant current charge controls to be completely independently two control loops with Isobarically Control, diverse control mode is used in different phase, under some application conditions, appear in the problem frequently switching the frequent saltus step of voltage caused between different control modes.
Summary of the invention
The present invention controls to there will be the problem frequently switched when using with Isobarically Control in view of above-mentioned constant current charge just, proposes a kind of new technical scheme, a kind of control method of dicyclo continuous control charging circuit.This control method is dicyclo continuous control mode, and battery charger, in constant current charge and constant voltage charge process, when there is battery discharge, still keeps steady operation.
In order to solve the problem, the present invention devises a kind of control method of dicyclo continuous control charging circuit, it is characterized in that, comprise Voltage loop to control and current loop control, described current loop control is the mode adopting Current Feedback Control PWM ON time Ton, Voltage loop controls to be the mode adopting Voltage Feedback to control electric current loop setting current value, in conjunction with the control strategy of each loop, no matter make when load current fluctuations appears in constant current or constant voltage charging phase, charge power supply can normally work; Between power input and power stage, a power switch circuit is installed, current loop control comprises current feedback and PMW control strategy, Voltage loop controls to comprise Voltage Feedback and current value control strategy, current feedback and Voltage Feedback are all connected on power take-off, the voltage signal of power take-off is sent to current value control strategy by Voltage Feedback, in conjunction with setting voltage value, to current loop control loop settings current value; The current signal of power take-off is sent to PMW control strategy by current feedback, and PMW control strategy driving power switching circuit regulates and controls.
Beneficial effect of the present invention is: at constant-current charging phase, and cell voltage does not reach constant voltage charge magnitude of voltage, and the current setting value of current loop control loop is stabilized on the current value of constant current charge by Voltage loop control loop.When cell voltage reaches constant voltage charge voltage, the setting electric current that Voltage loop controls electric current loop reduces gradually, makes charging voltage all-the-time stable in set point.When battery is at constant voltage charging phase, when there is the situation of externally electric discharge, voltage lower than the voltage setting value of constant voltage charge, under double-loop control effect, system gets back to constant-current charging phase, and electric current can be increased to constant current charge current value gradually on the basis of current set value.Whole process is an adjustment process controlled continuously, there will not be Voltage loop control and current loop control to switch the phenomenon of the frequent saltus step of the voltage caused back and forth.
Accompanying drawing explanation
Fig. 1 is the control principle schematic diagram of a kind of embodiment of control method of a kind of dicyclo of the present invention continuous control charging circuit.
Fig. 2 is the control flow chart of a kind of embodiment of control method of a kind of dicyclo of the present invention continuous control charging circuit.
Embodiment
Below with reference to accompanying drawing, the present invention is described further, but should not limit the scope of the invention with this.
For convenience of description and understand technical scheme of the present invention, below illustrate that the orientation that the noun of locality used all is shown with accompanying drawing is as the criterion.
The present invention devises a kind of control method of dicyclo continuous control charging circuit, it is characterized in that, comprise Voltage loop and control and current loop control, the current setting value of electric current loop is controlled by Voltage loop.Described Voltage loop controls to be specially: after charging starts, and controller obtains output voltage sensor reading Vout, and constant voltage charge voltage setting value is V
set, current setting value is I
set, voltage error value is Δ V=V
out-V
set, voltage control gain is K1, then I
set=I
set-K1* Δ V, works as I
set> I
maxtime, I
set=I
max.Described current loop control is specially: after charging starts, and controller obtains output current sensor reading I
out, current error value is Δ I=I
out-I
set, Current Control gain is the ON time that K2, PWM export is T
on, T
on=T
on-K2* Δ I, works as I
outwhen being less than minimum floating current, charging terminates; Work as I
outwhen being not less than minimum floating current, the recharge incipient stage, until I
outwhen being less than minimum floating current, charging terminates.
Described current loop control is the mode adopting Current Feedback Control PWM ON time Ton, Voltage loop controls to be the mode adopting Voltage Feedback to control electric current loop setting current value, in conjunction with the control strategy of each loop, no matter make when load current fluctuations appears in constant current or constant voltage charging phase, charge power supply can normally work.Between power input and power stage, a power switch circuit is installed, current loop control comprises current feedback and PMW control strategy, Voltage loop controls to comprise Voltage Feedback and current value control strategy, current feedback and Voltage Feedback are all connected on power take-off, the voltage signal of power take-off is sent to current value control strategy by Voltage Feedback, in conjunction with setting voltage value, to current loop control loop settings current value; The current signal of power take-off is sent to PMW control strategy by current feedback, and PMW control strategy driving power switching circuit regulates and controls.
At constant-current charging phase, cell voltage does not reach constant voltage charge magnitude of voltage, and the current setting value of current loop control loop is stabilized on the current value of constant current charge by Voltage loop control loop.When cell voltage reaches constant voltage charge voltage, the setting electric current that Voltage loop controls electric current loop reduces gradually, makes charging voltage all-the-time stable in set point.When battery is at constant voltage charging phase, when there is the situation of externally electric discharge, voltage lower than the voltage setting value of constant voltage charge, under double-loop control effect, system gets back to constant-current charging phase, and electric current can be increased to constant current charge current value gradually on the basis of current set value.Whole process is an adjustment process controlled continuously, there will not be Voltage loop control and current loop control to switch the phenomenon of the frequent saltus step of the voltage caused back and forth.By dicyclo continuous control mode, battery charger, in constant current charge and constant voltage charge process, when there is battery discharge, still keeps steady operation.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change above-mentioned execution mode and revise.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.
The present invention does not address part and is applicable to prior art.
Claims (2)
1. the control method of a dicyclo continuous control charging circuit, it is characterized in that, comprise Voltage loop to control and current loop control, described current loop control is the mode adopting Current Feedback Control PWM ON time Ton, Voltage loop controls to be the mode adopting Voltage Feedback to control electric current loop setting current value, in conjunction with the control strategy of each loop, no matter make when load current fluctuations appears in constant current or constant voltage charging phase, charge power supply can normally work; Between power input and power stage, a power switch circuit is installed, current loop control comprises current feedback and PMW control strategy, Voltage loop controls to comprise Voltage Feedback and current value control strategy, current feedback and Voltage Feedback are all connected on power take-off, the voltage signal of power take-off is sent to current value control strategy by Voltage Feedback, in conjunction with setting voltage value, to current loop control loop settings current value; The current signal of power take-off is sent to PMW control strategy by current feedback, and PMW control strategy driving power switching circuit regulates and controls.
2. the control method of a kind of dicyclo continuous control charging circuit according to claim 1, it is characterized in that, at constant-current charging phase, cell voltage does not reach constant voltage charge magnitude of voltage, and the current setting value of current loop control loop is stabilized on the current value of constant current charge by Voltage loop control loop; When cell voltage reaches constant voltage charge voltage, the setting electric current that Voltage loop controls electric current loop reduces gradually, makes charging voltage all-the-time stable in set point; When battery is at constant voltage charging phase, when there is the situation of externally electric discharge, voltage lower than the voltage setting value of constant voltage charge, under double-loop control effect, system gets back to constant-current charging phase, and electric current can be increased to constant current charge current value gradually on the basis of current set value; Whole process is an adjustment process controlled continuously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510701518.2A CN105207309A (en) | 2015-10-23 | 2015-10-23 | Double-loop continuous control charging circuit control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510701518.2A CN105207309A (en) | 2015-10-23 | 2015-10-23 | Double-loop continuous control charging circuit control method |
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| Publication Number | Publication Date |
|---|---|
| CN105207309A true CN105207309A (en) | 2015-12-30 |
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| CN201510701518.2A Pending CN105207309A (en) | 2015-10-23 | 2015-10-23 | Double-loop continuous control charging circuit control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112181034A (en) * | 2020-09-01 | 2021-01-05 | 深圳市格睿德电气有限公司 | Constant-voltage constant-current loop control system and control method thereof |
| CN112366794A (en) * | 2020-11-30 | 2021-02-12 | 科华恒盛股份有限公司 | Battery charging control device |
| CN116436297A (en) * | 2023-06-09 | 2023-07-14 | 华中科技大学 | Double-current-loop controlled switch linear hybrid power conversion system |
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| CN1641967A (en) * | 2004-01-08 | 2005-07-20 | 力博特公司 | Charging control method for cell charger and its circuit |
| CN201904729U (en) * | 2010-12-28 | 2011-07-20 | 天津电气传动设计研究所 | Novel voltage-continuously-adjustable high-power high-precision power source |
| JP2011257214A (en) * | 2010-06-08 | 2011-12-22 | Shin Kobe Electric Mach Co Ltd | Battery state estimating device and battery information notifying device |
| CN203056660U (en) * | 2013-01-23 | 2013-07-10 | 南京信息工程大学 | Intelligent charger for electric car |
-
2015
- 2015-10-23 CN CN201510701518.2A patent/CN105207309A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1641967A (en) * | 2004-01-08 | 2005-07-20 | 力博特公司 | Charging control method for cell charger and its circuit |
| JP2011257214A (en) * | 2010-06-08 | 2011-12-22 | Shin Kobe Electric Mach Co Ltd | Battery state estimating device and battery information notifying device |
| CN201904729U (en) * | 2010-12-28 | 2011-07-20 | 天津电气传动设计研究所 | Novel voltage-continuously-adjustable high-power high-precision power source |
| CN203056660U (en) * | 2013-01-23 | 2013-07-10 | 南京信息工程大学 | Intelligent charger for electric car |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112181034A (en) * | 2020-09-01 | 2021-01-05 | 深圳市格睿德电气有限公司 | Constant-voltage constant-current loop control system and control method thereof |
| CN112366794A (en) * | 2020-11-30 | 2021-02-12 | 科华恒盛股份有限公司 | Battery charging control device |
| CN112366794B (en) * | 2020-11-30 | 2023-04-28 | 科华恒盛股份有限公司 | Battery charging control device |
| CN116436297A (en) * | 2023-06-09 | 2023-07-14 | 华中科技大学 | Double-current-loop controlled switch linear hybrid power conversion system |
| CN116436297B (en) * | 2023-06-09 | 2023-11-10 | 华中科技大学 | Double-current-loop controlled switch linear hybrid power conversion system |
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Application publication date: 20151230 |