CN101335459B - Multi-charging current control circuit and method thereof - Google Patents
Multi-charging current control circuit and method thereof Download PDFInfo
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- CN101335459B CN101335459B CN2007101262656A CN200710126265A CN101335459B CN 101335459 B CN101335459 B CN 101335459B CN 2007101262656 A CN2007101262656 A CN 2007101262656A CN 200710126265 A CN200710126265 A CN 200710126265A CN 101335459 B CN101335459 B CN 101335459B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a multi-charge current control circuit which comprises a voltage reference unit, a current limiting unit, a current detector and a current control unit, wherein, the voltage reference unit can provide a plurality of reference voltages; the current limiting unit is based on a charge mode signal and chooses a corresponding reference voltage from the reference voltages so as to output a control signal according to the corresponding reference voltage; the current detector detects a first charging current and a second charging current and the current control unit controls the first charging current and the second charging current based on the control signal, wherein, the current detector feeds back the detected first charging current and the second charging current to the current control unit so that the current control unit can adjust the first charging current or the second charging current so as to maintain the sum of the first charging current and the second charging current is smaller than or equal to a set value.
Description
Technical field
The present invention relates to a kind of multi-charging current control circuit and method thereof, and particularly relate to a kind of functional and safe multi-charging current control circuit and method thereof.
Background technology
Please refer to Fig. 1, it shows the schematic diagram of traditional charging circuit.Charging circuit 100 comprises power supply unit 110, current control circuit 120, first power component 132, first energy-storage travelling wave tube 142, first current sensor 152, second power component 134, second energy-storage travelling wave tube 144 and second current sensor 154.Power supply unit 110 drives the action that first power components 132 and second power component 134 charge to first energy-storage travelling wave tube 142 and second energy-storage travelling wave tube 144 respectively.First energy-storage travelling wave tube 142 and second energy-storage travelling wave tube 144 for example are the battery of all kinds of electronic devices.
Current limiting unit 124 is learnt the first charging current IC1 and the second charging current IC2 from current detector 126.In addition, current limiting unit 124 is according to charge mode signal CM, keeps the first charging current IC1 and the second charging current IC2 sum is less than or equal to certain value.When the first charging current IC1 and the second charging current IC2 sum surpassed this definite value, then current limiting unit 124 outputs one control signal VCx was to switch control unit 128.Switch control unit 128 to suspend 144 chargings of second energy-storage travelling wave tube, can successfully charge the energy-storage travelling wave tube 142 of winning by second power component 134.
Please refer to Fig. 2, it shows the oscillogram of the charging current of traditional energy-storage travelling wave tube.Because current control circuit 120 is to utilize switch control unit 128 to control whether first energy-storage travelling wave tube 142 and second energy-storage travelling wave tube 144 are charged, when the first charging current IC1 and the second charging current IC2 sum surpass definite value, promptly by one of two power components (132 or 134).Thus, charging current can be as shown in Figure 2, have noise and extremely unstable, not only makes the charging quality reduce, and also can impact for life-span of energy-storage travelling wave tube (142 and 144) and power supply unit 110.
Summary of the invention
The invention provides a kind of multi-charging current control circuit and method thereof, utilize a closed circuit control circuit to control charging current accurately, with stable and the smooth-going action of charging.
According to a first aspect of the invention, propose a kind of multi-charging current control circuit, comprise Voltage Reference unit, current limiting unit, current detector and current control unit.The Voltage Reference unit provides a plurality of reference voltages.The charge mode detector receives an outside identification signal and exports a charge mode signal according to this.Current limiting unit select and this charge mode signal corresponding reference voltage in from then on a little reference voltages, and the corresponding reference voltage of foundation is to export a control signal according to this charge mode signal.Current detector detects one first charging current and one second charging current.Current control unit is controlled first charging current and second charging current according to control signal.Wherein, current detector feeds back to current control unit with detected first charging current and second charging current, make current control unit adjust first charging current or second charging current, to keep first charging current and the second charging current sum is less than or equal to certain value.
According to a second aspect of the invention, propose a kind of multi-charging current control method, comprise, at first, receive an outside identification signal to obtain a charge mode signal; According to this charge mode signal, from a plurality of reference voltages, select and this charge mode signal corresponding reference voltage, and the corresponding reference voltage of foundation is to export a control signal.Then, detect one first charging current and one second charging current.Afterwards,, adjust first charging current or second charging current, to keep first charging current and the second charging current sum is less than or equal to certain value according to control signal.
For foregoing of the present invention can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 shows the schematic diagram of traditional charging circuit.
Fig. 2 shows the oscillogram of the charging current of traditional energy-storage travelling wave tube.
Fig. 3 shows the schematic diagram according to many charging circuits of preferred embodiment of the present invention.
Fig. 4 shows the oscillogram according to the charging current of preferred embodiment of the present invention.
The reference numeral explanation
100: charging circuit
110,310: power supply unit
120: current control circuit
122,331: the charge mode detector
124,335: current limiting unit
126,337: current detector
128: switch control unit
132,351: the first power components
134,352: the second power components
142,371: the first energy-storage travelling wave tubes
144,372: the second energy-storage travelling wave tubes
152,391: the first current sensors
154,392: the second current sensors
300: many charging circuits
330: multi-charging current control circuit
333: the Voltage Reference unit
339: current control unit.
Embodiment
The invention provides a kind of multi-charging current control circuit and method thereof, utilize a closed circuit control circuit, the resistance of power controlling element is so that charging current is stable and smooth-going linearly, therefore the action of charging that energy-storage travelling wave tube can be functional and safe can not be subjected to the influence of power component characteristic changing.
Please refer to Fig. 3, it shows the schematic diagram according to many charging circuits of preferred embodiment of the present invention.Many charging circuits 300 comprise power supply unit 310, multi-charging current control circuit 330, first power component 351, first energy-storage travelling wave tube 371, first current sensor 391, first power component 352, first energy-storage travelling wave tube 372 and first current sensor 392.
Multi-charging current control circuit 330 comprises charge mode detector 331, Voltage Reference unit 333, current limiting unit 335, current detector 337 and current control unit 339.Because power supply unit 110 may be all kinds of power supplys, so charge mode detector 122 receives an outside identification signal Dx, this outside identification signal Dx provides the information that is relevant to power supply unit 110.Then, charge mode detector 122 outputs one charge mode signal CM is to current limiting unit 335.Voltage Reference unit 333 provides a plurality of reference voltages, and these a plurality of reference voltages are separately corresponding to one type power supply.
Because power supply unit 310 has maximum current limit, so utilize current limiting unit 335 excessive with the electric current of avoiding dashing cruelly.Current limiting unit 335 is selected a corresponding reference voltage Vref according to the pattern (corresponding to power supply unit 310) of charge mode signal CM decision charging in a plurality of reference voltages from Voltage Reference unit 333.This corresponding reference voltage Vref is relevant to the type of power supply unit 310, and for example as outside identification signal Dx during from a computer, corresponding reference voltage Vref then corresponds to computer.Afterwards, current limiting unit 335 is exported a control signal VCx to current control unit 339 according to corresponding reference voltage Vref.
The first charging current IC1 of first current sensor, 391 sensings, first energy-storage travelling wave tube 371, the second charging current IC2 of second current sensor, 392 sensings, second energy-storage travelling wave tube 372.Current detector 337 amplifies in fact and operates first current sensor 391 and 392 sensed result of second current sensor, and it is fed back to current control unit 339.
The control signal VCx that current control unit 339 received current limiting units 335 are exported, this control signal is used to limit the first charging current IC1 in fact and the second charging current IC2 sum is less than or equal to certain value to avoid surpassing the maximum current limit of power supply unit 310, and this definite value corresponds to corresponding reference voltage Vref.Current control unit 339 is adjusted the first charging current IC1 or the second charging current IC2 automatically according to control signal VCx and 337 feedacks of current detector, to keep the first charging current IC1 and the second charging current IC2 sum is less than or equal to definite value.
For instance, if first energy-storage travelling wave tube 371 is main charging device, then when the first charging current IC1 and the second charging current IC2 sum surpass definite value, one second resistance (not shown in figure) of current control unit 339 control second power component 352 inside to be to reduce by the second charging current IC2, keeps the first charging current IC1 and the second charging current IC2 sum is less than or equal to definite value.If second energy-storage travelling wave tube 372 is main charging device, then when the first charging current IC1 and the second charging current IC2 sum surpass definite value, one first resistance (not shown in figure) of current control unit 339 control second power component 351 inside to be to reduce by the first charging current IC1, keeps the first charging current IC1 and the second charging current IC2 sum is less than or equal to definite value.
In addition, the control of charging current is according to corresponding reference voltage Vref, because corresponding reference voltage Vref is provided by the Voltage Reference unit 333 of multi-charging current control circuit 330, and first power component 351 and second power component 352 are driving stages of multi-charging current control circuit 330 outsides, so the variation that is adjusted at correctly and is independent of the element characteristic of first power component 351 and second power component 352 of charging current.
Disclosed multi-charging current control circuit of the above embodiment of the present invention and method thereof, be by closed circuit many charging circuits, with the resistance of power controlling element linearly, and utilize independently reference voltage, make charging current can not be subjected to the influence of power component characteristic changing and instability.Therefore the disclosed multi-charging current control circuit of the embodiment of the invention can provide stable and smooth-going charging current, promotes the charging quality.In addition, embodiments of the invention can also have higher convenience simultaneously to a plurality of energy-storage travelling wave tube chargings, can only not charge to single energy-storage travelling wave tube when the sum total charging current is excessive as traditional charging circuit.
In sum, though the present invention discloses as above with a preferred embodiment, so it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is as the criterion when looking the claim person of defining of the present invention.
Claims (7)
1. multi-charging current control circuit comprises:
One Voltage Reference unit provides a plurality of reference voltages;
One charge mode detector receives corresponding to an outside identification signal of an external power source supply and also exports a charge mode signal according to this,
One current limiting unit according to this charge mode signal, is selected from those reference voltages and this charge mode signal corresponding reference voltage, and according to this correspondence reference voltage to export a control signal;
One current detector is used to detect one first charging current and one second charging current, this first charging current one first energy-storage travelling wave tube that is used to charge wherein, this second charging current one second energy-storage travelling wave tube that is used to charge; And
One current control unit according to this control signal, is controlled this first charging current and this second charging current;
Wherein, this current detector feeds back to this current control unit with detected this first charging current and this second charging current, make this current control unit adjust this first charging current or this second charging current, to keep this first charging current and this second charging current sum is less than or equal to certain value.
2. multi-charging current control circuit as claimed in claim 1, wherein, this definite value is to correspond to this correspondence reference voltage.
3. multi-charging current control circuit as claimed in claim 2, wherein, when this outside identification signal during from a computer, this correspondence reference voltage corresponds to this computer.
4. multi-charging current control circuit as claimed in claim 1, wherein, one first resistance that this current control unit is controlled one first power component is adjusting this first charging current, and this current control unit is controlled one second resistance of one second power component to adjust this second charging current.
5. multi-charging current control circuit as claimed in claim 1, wherein, this current detector detects this first charging current by one first current inductor, and this current detector detects this second charging current by one second current inductor.
6. multi-charging current control method comprises:
Reception corresponding to an outside identification signal of an external power source supply to obtain a charge mode signal;
According to this charge mode signal, from a plurality of reference voltages, select and this charge mode signal corresponding reference voltage, and according to this correspondence reference voltage to export a control signal;
Detect one first charging current and one second charging current, this first charging current one first energy-storage travelling wave tube that is used to charge wherein, this second charging current one second energy-storage travelling wave tube that is used to charge; And
According to this control signal, adjust this first charging current or this second charging current, to keep this first charging current and this second charging current sum is less than or equal to certain value.
7. multi-charging current control method as claimed in claim 6, wherein, this definite value corresponds to this correspondence reference voltage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101262656A CN101335459B (en) | 2007-06-26 | 2007-06-26 | Multi-charging current control circuit and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101262656A CN101335459B (en) | 2007-06-26 | 2007-06-26 | Multi-charging current control circuit and method thereof |
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| CN101335459A CN101335459A (en) | 2008-12-31 |
| CN101335459B true CN101335459B (en) | 2011-07-20 |
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| CN2007101262656A Active CN101335459B (en) | 2007-06-26 | 2007-06-26 | Multi-charging current control circuit and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI655528B (en) * | 2017-08-18 | 2019-04-01 | 聚明科技股份有限公司 | Charging system and its power adapter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5204991A (en) * | 1991-07-22 | 1993-04-20 | Law Ignace K | Automotive on/off circuit for automatic control of the power supply to electric automotive accessories |
| CN1236214A (en) * | 1998-05-15 | 1999-11-24 | 精工电子工业株式会社 | Charging and discharging control circuit and charging type power supply device |
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2007
- 2007-06-26 CN CN2007101262656A patent/CN101335459B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5204991A (en) * | 1991-07-22 | 1993-04-20 | Law Ignace K | Automotive on/off circuit for automatic control of the power supply to electric automotive accessories |
| CN1236214A (en) * | 1998-05-15 | 1999-11-24 | 精工电子工业株式会社 | Charging and discharging control circuit and charging type power supply device |
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| CN101335459A (en) | 2008-12-31 |
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