CN104901366A - Charging method and charging system - Google Patents
Charging method and charging system Download PDFInfo
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- CN104901366A CN104901366A CN201510266910.9A CN201510266910A CN104901366A CN 104901366 A CN104901366 A CN 104901366A CN 201510266910 A CN201510266910 A CN 201510266910A CN 104901366 A CN104901366 A CN 104901366A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a charging method and a charging system. The method comprises the steps that a battery is charged by a charger through a preset charging channel according to the present current output value of the charger; if the voltage value of the charged battery reaches the preset voltage value, fully charging of the battery is further judged; and if the battery is not fully charged, the charger is controlled to reduce the current output value by a control module, and the step that battery is charged by the charger through the preset charging channel according to the present current output value of the charger is performed continuously. With application of the mode, the charging method of successively decreasing charging current is adopted so that heat consumption of the preset charging channel is decreased gradually, and thus energy loss of the whole charging process is reduced and charging efficiency is enhanced. Meanwhile, relatively high charging current can be borne by the preset charging channel so that charging time can be greatly reduced and rapid charging of the battery can be realized.
Description
Technical field
The present invention relates to charging field, particularly relate to a kind of charging method and charging system.
Background technology
Along with the develop rapidly of smart mobile phone, the function achieved by it gets more and more, the screen supported is increasing, thus causes the power consumption of smart mobile phone increasing, and the cruising time of the battery in smart mobile phone is shorter and shorter.In order to normally use smart mobile phone, just need not timing be in smart mobile phone battery charging.
Traditional charging technique comprises switched charge and linear-charging, and wherein, the charge efficiency of switched charge is usually about 85%, and the charge efficiency of linear-charging, usually about 70%, both exists the problem that hear rate is large.In addition, no matter switched charge or the linear-charging of traditional charging technique, it all cannot support that super-large current charges, thus cannot realize the quick charge of battery, and then reduces the Experience Degree of people to smart mobile phone.
Therefore, need to provide a kind of charging method and charging system, to solve the problems of the technologies described above.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of charging method and charging system, while can improving charge efficiency, minimizing charging hear rate, realizes quick charge.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of charging method, the method comprises: charged to battery with the current output value that charger is current by predetermined charge tunnel by charger; Detect the magnitude of voltage of the battery after charging, and judge whether the magnitude of voltage of the battery after charging reaches scheduled voltage; If the magnitude of voltage of the battery after charging reaches scheduled voltage, judge whether battery has filled full; If battery does not fill full, control charger by control module and reduce current output value, and continue to perform the step of being charged to battery with the current output value that charger is current by predetermined charge tunnel by charger.
Wherein, before the step of being charged to battery with the current current output value of charger by predetermined charge tunnel by charger, method comprises step further: control charger by predetermined charge tunnel and cell communication by control module; The current output value being adjusted charger by control module is the lowest high-current value that predetermined charge tunnel can bear.
Wherein, control charger by control module and reduce current output value with predetermined step-length.
Wherein, judge whether battery has filled full step and comprised: judge whether the charging current of battery is less than cut-off current; If the charging current of battery is less than cut-off current, then judge that battery has filled full.
Wherein, the size of cut-off current 1/10th values obtained that are the rated capacitance of asking for battery.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of charging system, this system comprises charger, predetermined charge tunnel, control module and battery, wherein, charger is charged to battery with the current output value that charger is current by predetermined charge tunnel; Control module detects the magnitude of voltage of the battery after charging; If the magnitude of voltage of the battery after control module detects charging reaches scheduled voltage, continue to judge whether battery has filled full; If it is full that control module judges that battery does not fill, control module controls charger and reduces current output value, and charger continues to perform the operation of being charged to battery with the current output value that charger is current by predetermined charge tunnel.
Wherein, charger comprises: transformer module, is coupled to AC power, and the alternating current for inputting AC power carries out rectifying and wave-filtering and modulation treatment to produce the output current of charger; Feedback module, be coupled to transformer module, feedback module comprises multiple feedback unit, wherein different feedback units corresponds to the different target current output value of charger, feedback module receives the selection signal that feedback control module exports, and according to the feedback unit selected in the multiple feedback unit of signal behavior; Transformer control module, is coupled between selected feedback unit and transformer, and then controls the output current of charger and equal target current output valve corresponding to selected feedback unit; Charging inlet, is coupled to control module and feedback control module, the selection signal that control module is exported by the low and high level adjustment feedback control module arranged at least one terminal of charging inlet, and then the output current of adjustment charger.
Wherein, transformer module comprises transformer, transformer comprises former limit winding, auxiliary winding and vice-side winding, transformer control module comprises the first switch element and control chip, the first end of the first switch element is connected with the driving pin of control chip, second end and former limit winding switching, 3rd end is connected with the current detecting pin of control chip, multiple feedback unit comprises multiple shunt resistance, multiple second switch element and multiple optoelectronic isolating element, multiple shunt resistance is connected in parallel to each other and the current detecting pin of the further connection control chip of the high-pressure side of multiple shunt resistance, the light-emitting component correspondence of each optoelectronic isolating element connects a second switch element, the photo detector correspondence of each optoelectronic isolating element connects a current-limiting resistance, the selection signal-selectivity conducting that each second switch element exports according to feedback module, and then select different shunt resistances and the first switch element to form different shunt circuits to obtain the target current output valve of different chargers.
Wherein, the output current of charger calculates according to following formula:
Iout＝Vcs*Np/Ns/Ri；
Wherein, Iout is the current output value of charger, and Vcs is the voltage of current detecting pin, and Np is the number of turn of former limit winding, and Ns is the number of turn of vice-side winding, and Ri is the resistance of the feedback unit selected in feedback module.
Wherein, predetermined charge tunnel comprises the first metal-oxide-semiconductor, second metal-oxide-semiconductor and the 3rd metal-oxide-semiconductor, charger is connected with battery with the second metal-oxide-semiconductor by the first metal-oxide-semiconductor, 3rd metal-oxide-semiconductor is used for selectivity conducting first metal-oxide-semiconductor and the second metal-oxide-semiconductor under the control of control module, is charged by predetermined charge tunnel to make charger to battery.
The invention has the beneficial effects as follows: the situation being different from prior art, charging method of the present invention and charging system are charged to battery with the current output value that charger is current by predetermined charge tunnel by charger; Detect the magnitude of voltage of the battery after charging; If the magnitude of voltage of the battery after charging reaches scheduled voltage, judge whether battery has filled full; If battery does not fill full, control charger by control module and reduce current output value, and continue to perform the step of being charged to battery with the current output value that charger is current by predetermined charge tunnel by charger.By the way, due to the charging method adopting charging current to reduce successively, make the hear rate of predetermined charge tunnel more and more less, thus reduce the energy loss in whole charging process, improve charge efficiency.Meanwhile, because predetermined charge tunnel can bear larger charging current, thus significantly can reduce the charging interval, realize the quick charge of battery.
Accompanying drawing explanation
Fig. 1 is the structural representation of the charging system of the embodiment of the present invention;
Fig. 2 is the structural representation of charger in Fig. 1;
Fig. 3 is the circuit theory diagrams of charger shown in Fig. 2;
Fig. 4 is the output voltage of charger shown in Fig. 3 and the curve chart of output current;
Fig. 5 is the circuit theory diagrams of predetermined charge tunnel shown in Fig. 1;
Fig. 6 is the flow chart of the charging method of the embodiment of the present invention.
Embodiment
Some vocabulary is employed to censure specific assembly in the middle of specification and claims.One of skill in the art should understand, and same assembly may be called with different nouns by manufacturer.This specification and claims book is not used as with the difference of title the mode distinguishing assembly, but is used as the benchmark of differentiation with assembly difference functionally.Below in conjunction with drawings and Examples, the present invention is described in detail.
Fig. 1 is the structural representation of the charging system of the embodiment of the present invention.As shown in Figure 1, charging system comprises charger 1, predetermined charge tunnel 2, control module 3 and battery 4.
Control module 3 is connected with charger 1, predetermined charge tunnel 2, control module 3 and battery 4 respectively.
Wherein, control module 3 is connected with charger 1, for adjusting the output current of charger 1, also namely adjusts the current output value of charger 1.
Please also refer to the structural representation that Fig. 2, Fig. 2 are chargers in Fig. 1.As shown in Figure 2, charger 1 comprises transformer module 11, feedback module 12, feedback control module 13, transformer control module 14 and charging inlet 15.
Transformer module 11, is coupled to AC power, and the alternating current for inputting AC power carries out rectifying and wave-filtering and modulation treatment to produce the output current of charger 1.
Feedback module 12, be coupled to transformer module 11, feedback module 12 comprises multiple feedback unit, wherein different feedback units corresponds to the different target current output value of charger 1, feedback module 12 receives the selection signal that feedback control module 13 exports, and according to the feedback unit selected in multiple feedback unit described in signal behavior.
Transformer control module 14, is coupled between selected feedback unit and transformer module 11, and then controls the output current of charger 1 and equal target current output valve corresponding to selected feedback unit.
Charging inlet 15, is coupled to control module 3 and feedback control module 13, the selection signal that control module 3 is exported by the low and high level adjustment feedback control module 13 arranged at least one terminal of charging inlet 15, and then the output current of adjustment charger 1.
Please also refer to the circuit theory diagrams that Fig. 3, Fig. 3 are chargers shown in Fig. 2.As shown in Figure 3, transformer module 11 comprises transformer U1, rectifier diode D1 and electric capacity C1, and wherein, transformer U1 comprises former limit winding 111, auxiliary winding 112 and vice-side winding 113.Feedback module 12 comprises multiple shunt resistance RiN (N=1,2 ..., n), multiple optoelectronic isolating element PHiN (N=1,2 ..., n) with multiple 3rd switch element QiN (N=1,2 ..., n).Feedback control module 13 comprises multiple selection signal output part OutN (N=1,2 ..., n) with multiple data input pin InN (N=1,2 ..., n).Transformer control module 14 comprises the first switch element Q2, control chip U2, the first divider resistance R1 and the second divider resistance R2.Charging inlet 15 comprises the first data terminal D+ and the second data terminal D-.
The live wire L of alternating current is connected with the first end 114 of the former limit winding 111 of transformer U1, and the zero line N of alternating current is connected with earth signal GND.
Second end 115 of the former limit winding 111 of transformer U1 is connected with transformer control module 14, and specifically, the second end 115 of former limit winding 111 is connected with the first switch element Q2, and the first switch element Q2 is connected with control chip U2.
Wherein, first switch element Q2 is NPN triode, control chip U2 comprises driving pin GATE, Voltage Feedback pin FB, current detecting pin CS and power pins VCC, second end 115 of former limit winding 111 is connected with the collector electrode of the first switch element Q2, the base stage of the first switch element Q2 is connected with the driving pin GATE of control chip U2, the emitter of the first switch element Q2 is connected with the current detecting pin CS of control chip U2 and feedback module 12, the Voltage Feedback pin FB of control chip U2 is connected with one end of the first divider resistance R1 and the second divider resistance R2 respectively, the other end of the first divider resistance R1 is connected with the first end 116 of auxiliary winding 112, the other end of the second divider resistance R2 is connected with earth signal GND.
The auxiliary winding 112 of transformer U1 is powered for giving control chip U2.Specifically, transformer control module 14 comprises current-limiting resistance Ra and rectifier diode D2 further, one end of current-limiting resistance Ra is connected with the first end 116 of auxiliary winding 112, in order to obtain the boost voltage of auxiliary winding 112, the other end of current-limiting resistance Ra is connected with the anode of rectifier diode D2, the negative electrode of rectifier diode D2 is connected with the power pins VCC of control chip U2, and the second end 117 of auxiliary winding 112 connects earth signal GND.
The first end 118 of the vice-side winding 113 of transformer U1 is connected with the anode of rectifier diode D1, and electric capacity C1 is connected in series in the negative electrode of rectifier diode D1 and the second end 119 of vice-side winding 113, and the second end 119 of vice-side winding 113 is connected with earth signal GND.
Feedback module 12 is coupled to transformer module 11 and feedback control module 13.In feedback module 12, one end of multiple shunt resistance RiN is connected to each other and is connected to the current sense pin CS of control chip U2, the other end of multiple shunt resistance RiN is connected with the collector electrode of multiple optoelectronic isolating element PHiN respectively, the emitter signal GND connected to one another and to ground of multiple optoelectronic isolating element PHiN, the anode of multiple optoelectronic isolating element PHiN is connected to each other and is connected to the common node place of rectifier diode D1 and electric capacity C1, when the 3rd switch element QiN is NMOS tube, the negative electrode of multiple optoelectronic isolating element PHiN is connected with the source electrode of multiple 3rd switch element QiN respectively, the drain electrode signal GND connected to one another and to ground of multiple 3rd switch element QiN, multiple selection signal IsN (N=1 that the grid of multiple 3rd switch element QiN exports with feedback control module 13 respectively, 2 n) connect.
Preferably; feedback module 12 comprises multiple current-limiting resistance R2N (N=1 further; 2 ... n); multiple second current-limiting resistance R2N is serially connected with the anode of multiple optoelectronic isolating element PHiN and the common node place of rectifier diode D1 and electric capacity C1 respectively; flow through the electric current of optoelectronic isolating element PHiN in order to restriction, normally work to protect optoelectronic isolating element PHiN.
Feedback control module 13 is connected with charging inlet 15, specifically, data input pin InN (the N=1 of feedback control module 13,3,5 ... 2n-1) be connected with the first data terminal D+ of charging inlet 15, data input pin InN (N=2,4,6 of feedback control module 13 ... 2n) be connected with the second data terminal D-of charging inlet 15.
When selecting signal IsN to be high level, the drain electrode of the three switch element QiN corresponding with it and source conduction, thus make the optoelectronic isolating element PhiN corresponding with it be in conducting state, then the shunt resistance RiN be connected with the collector electrode of optoelectronic isolating element PhiN is respectively made to have electric current to flow through, now, shunt resistance RiN is in the state that namely work also chosen, thus controls the size of primary current in former limit winding 111.
When selecting signal IsN to be low level, the drain electrode of the 3rd corresponding with it switch element QiN and source electrode cut-off, thus make the optoelectronic isolating element PhiN corresponding with it be in off-state, the shunt resistance RiN be connected with the collector electrode of optoelectronic isolating element PhiN does not respectively have electric current to flow through, and it is in the i.e. not selected state that do not work also.
In the present embodiment, in charging process, the selection signal IsN that control module 3 is exported by the low and high level adjustment feedback control module 16 of the first data terminal D+ and the second data terminal D-that arrange charging inlet 14, and then select different shunt resistance RiN, when the voltage Vcs at the current detecting pin CS place of control chip U2 is fixed value, different shunt resistance RiN is selected to form different current-limiting circuits from the first switch element Q2 and carry out current limliting to the electric current flowing through former limit winding 111, also different shunt resistance RiN is namely selected to be changed by the primary current caused in former limit winding 111, and then cause the output current of charger 1 to change.
In the present embodiment, for example, as N=3, feedback module 12 comprises three shunt resistances, and it is respectively Ri1, Ri2 and Ri3, and the resistance of shunt resistance Ri1, Ri2 and Ri3 progressively increases.Three optoelectronic isolating elements, it is respectively Phi1, Phi2 and Phi3, and three the 3rd switch elements, and it is Qi1, Qi2 and Qi3 respectively.Wherein, the grid of three the 3rd switch elements selects signal output part Out1, Out2 and Out3 to be connected with three of feedback control module 13 respectively, selects signal output part Out1, Out2 and Out3 to export respectively for three and selects signal Is1, Is2 and Is3.
Wherein, feedback control module 13 comprises two data input pin In1 and In2, the data input pin In1 of feedback control module 13 is connected with the first data terminal D+ of charging inlet 15, the data input pin In2 of feedback control module 13 and the second data terminal D of charging inlet 14-be connected.In the present embodiment, charging inlet 14 is USB interface.It will be understood by those skilled in the art that in other embodiments, charging inlet 14 also can for being different from other interface of USB interface, and the present invention is not as limit.
If the level that control module 3 arranges the first data terminal D+ of charging inlet 14 is the first level, when the level of the second data terminal D-is the first level, the selection signal Is1 that feedback control module 13 exports is high level, Is2 and Is3 is low level, then shunt resistance Ri1 is selected, thus makes charger export the target current output valve of the first rated current XA.
If the level that control module 3 arranges the first data terminal D+ of charging inlet 14 is the first level, when the level of the second data terminal D-is second electrical level, the selection signal Is2 that feedback control module 13 exports is high level, Is1 and Is3 is low level, then shunt resistance Ri2 is selected, thus makes charger export the target current output valve of the second rated current YA.
If the level that control module 3 arranges the first data terminal D+ of charging inlet 14 is second electrical level, when the level of the second data terminal D-is the first level, the selection signal Is3 that feedback control module 13 exports is high level, Is1 and Is2 is low level, then shunt resistance Ri3 is selected, thus makes charger export the target current output valve of the 3rd rated current ZA.
Wherein, the first level and second electrical level are not identical, and the first level, second electrical level are the one in low and high level.
Wherein, the primary current Ip on the winding of former limit calculates according to following formula:
Ip＝Vcs/Rin；
Wherein, Vcs is the voltage at the current detecting pin CS place of control chip U2, and Rin is the shunt resistance chosen, and it is specially one in three shunt resistances Ri1, Ri2 and Ri3.
It will be appreciated by those skilled in the art that, when feedback control module 13 controls to select the multiple signals in signal Is1, Is2 and Is3 to be high level, thus choose the multiple primary current Ip controlled in the winding of former limit in three shunt resistances Ri1, Ri2 and Ri3, now, the Rin in above-mentioned formula be multiple shunt resistances of choosing parallel with one another after the resistance value that obtains.
Further, according to the electric current of transformer and the relation of umber of turn:
Iout＝Ip*Np/Ns；
Wherein, Iout is the output current of charger 1, and Ip is primary current, and Np is the number of turn of former limit winding 111, and Ns is the number of turn of vice-side winding 113.
The formula that can obtain the galvanic output current Iout of computational load according to above-mentioned two formula is:
Iout＝Vcs*Np/Ns/Rin；
Wherein, Iout is the output current of charger 1, and Np is the number of turn of former limit winding 111, and Ns is the number of turn of vice-side winding 113, and Rin is the shunt resistance chosen, and it is specially one in three shunt resistances Ri1, Ri2 and Ri3.
When control module 3 of the present invention is by arranging low and high level at least one terminal of charging inlet 15 to make charger 1 reduce output current according to pre-defined rule, when the resistance of three shunt resistances Ri1, Ri2 and Ri3 progressively increases, selection signal Is1, Is2 and Is3 that then control module 3 adjusts feedback control module 13 export high level successively to make three shunt resistances Ri1, Ri2 and Ri3 selected successively, thus the first rated current XA of the output of charger 1, the second rated current YA and the 3rd rated current ZA are lowered successively.Preferably, if when selection signal Is1, Is2 and Is3 charger 1 that control module 3 control module 3 of the present invention adjusts feedback control module 13 is to make charger 1 progressively reduce output current according to predetermined step-length, the resistance of three shunt resistances Ri1, Ri2 and Ri3 not only demand fulfillment progressively increases, and the resistance of three shunt resistances also needs to meet
selection signal Is1, Is2 and Is3 that control module 3 adjusts feedback control module 13 export high level successively to make three shunt resistances Ri1, Ri2 and Ri3 selected successively, thus the first rated current XA of the output of charger 1, the second rated current YA and the 3rd rated current ZA are progressively reduced according to predetermined step-length.
In actual applications, the voltage Vcs at the current detecting pin CS place of control chip U2, the number of turn Np of former limit winding, the number of turn Ns of vice-side winding are fixed value, now, by the output current choosing different shunt resistance Rin can obtain different chargers 1.Those skilled in the art can understand, and above-mentioned N=3 is only citing, and the present invention is not as limit.
It should be noted that those skilled in the art can make the amendment on circuit completely according to the function of feedback module in the present embodiment 12 realization.Such as, utilize relay to replace optoelectronic isolating element PhiN etc., the present invention is not restricted to the concrete circuit implementation of feedback module 12, only need meet the function that it realizes.
The output voltage of charger shown in Fig. 3 and the curve chart of output current please also refer to Fig. 4, Fig. 4.As shown in Figure 4, I axle is the output current of charger, and V axle is the output voltage of charger.As seen from Figure 4, when the resistance of three shunt resistances Ri1, Ri2 and Ri3 progressively increases, the first rated current XA, the second rated current YA that charger exports and the 3rd rated current ZA progressively reduce.
Please continue to refer to Fig. 1, in FIG, control module 3 is connected with predetermined charge tunnel 2, opens to be communicated with connecting path that charger 1 is connected with battery 4 by predetermined charge tunnel 2 for controlling predetermined charge tunnel 2 and closes to disconnect for controlling predetermined charge tunnel 2 connecting path that charger 1 is connected with battery 4 by predetermined charge tunnel 2.
Please also refer to the circuit theory diagrams that Fig. 5, Fig. 5 are predetermined charge tunnels shown in Fig. 1.As shown in Figure 5, predetermined charge tunnel 2 comprises the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2 and the 3rd metal-oxide-semiconductor Q3.
Wherein, charger 1 is connected with battery 4 with the second metal-oxide-semiconductor Q2 by the first metal-oxide-semiconductor Q1,3rd metal-oxide-semiconductor Q3 is used for selectivity conducting first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 under the control of control module 3, is charged by predetermined charge tunnel 2 to make charger 1 to battery 4.
Specifically, the drain electrode of the first metal-oxide-semiconductor Q1 is connected with the common node of the rectifier diode D1 of charger in Fig. 31 and electric capacity C1, the source electrode of the first metal-oxide-semiconductor Q1 is connected with the source electrode of the second metal-oxide-semiconductor Q2 and is connected with the drain electrode of the 3rd metal-oxide-semiconductor Q3 afterwards, the grid of the first metal-oxide-semiconductor Q1 is connected with the grid of the second metal-oxide-semiconductor Q2 and is connected with the drain electrode of the 3rd metal-oxide-semiconductor Q3 afterwards, the drain electrode of the second metal-oxide-semiconductor Q2 is connected with battery 4, the grid of the 3rd metal-oxide-semiconductor Q3 is connected with control module 3, and the source electrode of the 3rd metal-oxide-semiconductor Q3 is connected with earth signal GND.
Preferably, predetermined charge tunnel 2 also comprises the first resistance R1 and the second resistance R2.One end of first resistance R1 is connected with the grid of the 3rd metal-oxide-semiconductor Q3, the other end of the first resistance R1 is connected with the source electrode of the 3rd metal-oxide-semiconductor Q3, one end of second resistance R2 is connected with the common node of the source electrode of the second metal-oxide-semiconductor Q2 with the source electrode of the first metal-oxide-semiconductor Q1, and the other end of the second resistance R2 is connected with the drain electrode of the 3rd metal-oxide-semiconductor Q3.Wherein, the first resistance R1 second resistance R2 flows through the electric current of the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2 and the 3rd metal-oxide-semiconductor Q3 in order to restriction, protects the normal work of the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2 and the 3rd metal-oxide-semiconductor Q3.
If control module 3 opens to be communicated with for controlling predetermined charge tunnel 2 connecting path that charger 1 is connected with battery 4 by predetermined charge tunnel 2, control module 3 exports high level signal to the grid of the 3rd metal-oxide-semiconductor Q3.After the grid of the 3rd metal-oxide-semiconductor Q3 receives high level signal, the source electrode of the 3rd metal-oxide-semiconductor Q3 and drain electrode conducting, thus drive source electrode and the drain electrode conducting of the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2, and then charger 1 can be charged to battery 4 by the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2.
If control module 3 closes to disconnect for controlling predetermined charge tunnel 2 connecting path that charger 1 is connected with battery 4 by predetermined charge tunnel 2, control module 3 is to the grid output low level signal of the 3rd metal-oxide-semiconductor Q3.After the grid of the 3rd metal-oxide-semiconductor Q3 receives low level signal, source electrode and the drain electrode of the 3rd metal-oxide-semiconductor Q3 disconnect, thus drive the source electrode of the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 and drain electrode to disconnect, and then the connecting path that charger 1 is connected with battery 4 by the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 disconnects.
Wherein, charger 1 is undertaken in the process of charging to battery 4 by predetermined charge tunnel 2, because the internal resistance of the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 is very little, predetermined charge tunnel 2 can bear larger charging current, meanwhile, the charge efficiency of predetermined charge tunnel 2 is high, energy loss is little.
The charging current exporting the first rated current XA with charger 1 is charged to battery 4, suppose that the first rated current is 5A, the internal resistance of the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 is 0.01 Europe, the magnitude of voltage of battery 4 is 4.0V is example, energy loss is 0.02 × 5 × 5=0.5W, and charge efficiency is (4.0-0.02 × 5)/4.0=97.5%.It is compared with common 5.0V/1.0A switched charge, energy loss also will less, efficiency is taller.Meanwhile, along with follow-up charging current progressively reduces and it is all less than the first rated current XA, the energy loss of predetermined charge tunnel 2 also progressively reduces along with the minimizing of charging current.
Control module 3 is connected with battery 4, for detecting the magnitude of voltage of the charging current of battery 4 and the battery 4 after charging and operating accordingly according to the result detected.
Specifically, charger 1 is charged to battery 4 with the current output value that charger 1 is current by predetermined charge tunnel 2.In the process of charging, control module 3 detects the magnitude of voltage of the battery 4 after charging, and judges whether the magnitude of voltage of the battery 4 after charging reaches scheduled voltage.Wherein, if the magnitude of voltage of the battery 4 after control module 3 detects charging does not reach scheduled voltage, charger 1 continues to perform the operation of being charged to battery 4 with the current output value that charger 1 is current by predetermined charge tunnel 2, if the magnitude of voltage of the battery 4 after control module 3 detects charging reaches scheduled voltage, continue to detect battery 4 and whether filled full.If battery 4 does not fill full, control module 3 controls charger 1 and reduces current output value, and repeats the operation that charger 1 charged to battery 4 with the current output value that charger 1 is current by predetermined charge tunnel 2, until battery 4 fill full till.
Preferably, before the operation that charger 1 is charged to battery 4 with the current current output value of charger 1 by predetermined charge tunnel 2, control module 3 controls charger 1 by after predetermined charge tunnel 2 and cell communication, and the current output value that control module 3 adjusts charger is the lowest high-current value that predetermined charge tunnel 2 can bear.
Preferably, control module 3 controls the operation that charger 1 reduces current output value and is specially: control module 3 controls charger 1 and reduces current output value with predetermined step-length.
Preferably, control module 3 judges whether battery 4 has filled full operation and be specially: control module judges whether the charging current of battery 4 is less than cut-off current; If the charging current of battery 4 is less than cut-off current, then judge that battery 4 has filled full.Wherein, 1/10th values obtained that the size of cut-off current is the rated capacitance of asking for battery, also namely cut-off current is 0.1C, wherein the rated capacitance of the corresponding battery of 1C.For example, for the rated capacitance of 1 batteries for 1200mAH, the rated capacitance of 1 batteries is 1C, then cut-off current is 120mA.
Fig. 6 is the flow chart of the charging method of the embodiment of the present invention, and the charging method shown in Fig. 6 is based on the charging system shown in Fig. 1.If it is noted that there is result identical in fact, method of the present invention is not limited with the flow sequence shown in Fig. 6.As shown in Figure 6, the method comprises the steps:
Step S101: control charger 1 by control module 3 and be communicated with battery 4 by predetermined charge tunnel 2.
In step S101, predetermined charge tunnel 2 comprises the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2 and the 3rd metal-oxide-semiconductor Q3.Control by control module 3 step that charger 1 is communicated with battery 4 by predetermined charge tunnel 2 to be specially: control module 3 exports high level signal to the grid of the 3rd metal-oxide-semiconductor Q3, after the grid of the 3rd metal-oxide-semiconductor Q3 receives high level signal, the source electrode of the 3rd metal-oxide-semiconductor Q3 and drain electrode conducting, thus drive source electrode and the drain electrode conducting of the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2, and then charger 1 can be charged to battery 4 by the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2.
Step S102: the current output value being adjusted charger 1 by control module 3 is the lowest high-current value that predetermined charge tunnel 2 can bear.
In step s 102, the lowest high-current value that predetermined charge tunnel 2 can bear is the first rated current XA, the current output value adjusting charger 1 by control module 3 is that the step of the lowest high-current value that predetermined charge tunnel 2 can bear is specially: the level being arranged the first data terminal D+ of charging inlet 14 by control module 3 is the first level, the level of the second data terminal D-is the first level, the selection signal Is1 that feedback control module 13 exports is high level, Is2 and Is3 is low level, shunt resistance Ri1 is selected, thus make charger export the target current output valve of the first rated current XA.
Step S103: battery is charged with the current output value that charger 1 is current by predetermined charge tunnel 2 by charger 1.
In step s 103, when first time performs step S103, with the charging current of the first rated current XA, battery is charged by predetermined charge tunnel 2 by charger 1.When second time performs step S103, with the charging current of the second rated current YA, battery is charged by predetermined charge tunnel 2 by charger 1.Third time, when performing step S103, is charged to battery with the charging current of the 3rd rated current ZA by predetermined charge tunnel 2 by charger 1 ... the rest may be inferred, till battery is full of.Wherein, the first rated current XA is greater than the second rated current YA, and the second rated current YA is greater than the 3rd rated current ... the rest may be inferred, and also namely charging current is progressively successively decreased along with charging.
Step S104: the magnitude of voltage detecting the battery 4 after charging, and judge whether the magnitude of voltage of the battery 4 after charging reaches scheduled voltage; If the magnitude of voltage of the battery 4 after charging reaches scheduled voltage, perform step S105, otherwise continue to perform step S103;
In step S104, scheduled voltage is preferably 4.35V, and the magnitude of voltage of the battery after constant current charge being detected reaches 4.35V, continues to perform step S105.
Step S105: judge whether battery 4 has filled by control module 3 full; If battery 4 does not fill full, perform step S106, otherwise perform step S107;
In step S105, judge whether battery 4 has filled full step and be specially by control module 3: judge whether the charging current of battery 3 is less than cut-off current by control module 3.If when control module 3 judges that the charging current of battery 3 is less than cut-off current, then judge that battery has filled full.Wherein, wherein, 1/10th values obtained that the size of cut-off current is the rated capacitance of asking for battery, also namely cut-off current is 0.1C, wherein the rated capacitance of the corresponding battery of 1C.
In other embodiments, judge whether battery 4 has filled full step and can also be by control module 3: judge whether the electricity of battery 4 reaches capacity charge value by control module 3.If control module 3 judges the electricity of battery 4 and to reach capacity charge value, then judge that battery has filled full.
Step S106: control charger 1 by control module 3 and reduce current output value, and continue to perform step S103;
In step s 106, when first time performs step S106, control by control module 3 step that charger 1 reduces current output value and be specially: the current output value being controlled charger 1 by control module 3 is reduced to the second rated current YA from the first rated current XA.When second time performs step S106, control by control module 3 step that charger 1 reduces current output value to be specially: the current output value being controlled charger 1 by control module 3 is reduced to the 3rd rated current ZA...... by that analogy, till battery is full of from the second rated current YA.Namely wherein, the first rated current XA is greater than the second rated current YA, and the second rated current YA is greater than the 3rd rated current ZA......, and the rest may be inferred, and also charging current is progressively successively decreased along with charging.
Preferably, control charger 1 by control module 3 and reduce current output value with predetermined step-length.That is, the difference of the first rated current XA and the second rated current YA equals the difference of the second rated current YA and the 3rd rated current ZA ... the rest may be inferred.
Step S107: controlled to disconnect the connecting path that is communicated with battery 3 by predetermined charge tunnel 2 of charger 1 by control module 3.
In step s 107, the step being controlled to disconnect the connecting path that charger 1 is communicated with battery 3 by predetermined charge tunnel 2 by control module 3 is specially: by the grid output low level signal of control module 3 to the 3rd metal-oxide-semiconductor Q3, after the grid of the 3rd metal-oxide-semiconductor Q3 receives low level signal, source electrode and the drain electrode of the 3rd metal-oxide-semiconductor Q3 disconnect, thus drive the source electrode of the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 and drain electrode to disconnect, and then the connecting path that charger 1 is connected with battery 4 by the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 disconnects.
Be different from the situation of prior art, charging method of the present invention and charging system are charged to battery with the current output value that charger is current by predetermined charge tunnel by charger; Detect the magnitude of voltage of the battery after charging; If the magnitude of voltage of the battery after charging reaches scheduled voltage, judge whether battery has filled full; If battery does not fill full, control charger by control module and reduce current output value, and continue to perform the step of being charged to battery with the current output value that charger is current by predetermined charge tunnel by charger.By the way, due to the charging method adopting charging current to reduce successively, make the hear rate of predetermined charge tunnel more and more less, thus reduce the energy loss in whole charging process, improve charge efficiency.Meanwhile, because predetermined charge tunnel can bear larger charging current, thus significantly can reduce the charging interval, realize the quick charge of battery.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a charging method, is characterized in that, described method comprises:
With the current output value that charger is current, battery is charged by predetermined charge tunnel by charger;
Detect the magnitude of voltage of the described battery after charging, and judge whether the magnitude of voltage of the described battery after charging reaches scheduled voltage;
If the magnitude of voltage of the described battery after charging reaches scheduled voltage, judge whether described battery has filled full;
If described battery does not fill full, control described charger by control module and reduce current output value, and the step of with the current output value that charger is current, battery being charged by predetermined charge tunnel by charger described in continuation execution.
2. want the charging method described in 1 according to right, it is characterized in that, before described step of being charged to battery with the current current output value of charger by predetermined charge tunnel by charger, described method comprises step further:
Charger is controlled by predetermined charge tunnel and cell communication by control module;
The current output value being adjusted described charger by described control module is the lowest high-current value that described predetermined charge tunnel can bear.
3. charging method according to claim 1, is characterized in that, describedly controls described charger by control module and reduces the step of current output value and comprise:
Control described charger by control module and reduce current output value with predetermined step-length.
4. charging method according to claim 1, is characterized in that, describedly judges whether described battery has filled full step and comprised:
Judge whether the charging current of described battery is less than cut-off current;
If the charging current of described battery is less than cut-off current, then judge that described battery has filled full.
5. charging method according to claim 4, is characterized in that, 1/10th values obtained that the size of described cut-off current is the rated capacitance of asking for battery.
6. a charging system, is characterized in that, described system comprises charger, predetermined charge tunnel, control module and battery, and wherein, described charger is charged to described battery with the current output value that described charger is current by described predetermined charge tunnel; Described control module detects the magnitude of voltage of the described battery after charging; If the magnitude of voltage of the described battery after described control module detects charging reaches scheduled voltage, continue to judge whether described battery has filled full; If it is full that described control module judges that described battery does not fill, described control module controls described charger and reduces current output value, and described charger continues to perform the operation of being charged to described battery with the current output value that described charger is current by described predetermined charge tunnel.
7. charging system according to claim 6, is characterized in that, described charger comprises:
Transformer module, is coupled to AC power, and the alternating current for inputting described AC power carries out rectifying and wave-filtering and modulation treatment to produce the output current of described charger;
Feedback module, be coupled to described transformer module, described feedback module comprises multiple feedback unit, wherein different feedback units corresponds to the different target current output value of described charger, described feedback module receives the selection signal that described feedback control module exports, and the feedback unit in multiple feedback unit according to described selection signal behavior;
Transformer control module, is coupled between selected described feedback unit and described transformer, and then the described output current controlling described charger equals target current output valve corresponding to selected described feedback unit;
Charging inlet, be coupled to described control module and described feedback control module, described control module adjusts the described selection signal of described feedback control module output by the low and high level arranged at least one terminal of described charging inlet, and then adjusts the described output current of described charger.
8. system according to claim 7, it is characterized in that, described transformer module comprises transformer, described transformer comprises former limit winding, auxiliary winding and vice-side winding, described transformer control module comprises the first switch element and control chip, the first end of described first switch element is connected with the driving pin of described control chip, second end and described former limit winding switching, 3rd end is connected with the current detecting pin of described control chip, multiple described feedback unit comprises multiple shunt resistance, multiple second switch element and multiple optoelectronic isolating element, described multiple shunt resistance is connected in parallel to each other and the high-pressure side of described multiple shunt resistance connects the described current detecting pin of described control chip further, the light-emitting component correspondence of optoelectronic isolating element described in each connects second switch element described in, the photo detector correspondence of optoelectronic isolating element described in each connects current-limiting resistance described in, the selection signal-selectivity conducting that second switch element described in each exports according to described feedback module, and then select different described shunt resistances and described first switch element to form different shunt circuits to obtain the target current output valve of different described chargers.
9. system according to claim 8, is characterized in that, the output current of described charger calculates according to following formula:
Iout＝Vcs*Np/Ns/Ri；
Wherein, Iout is the output current of described charger, and Vcs is the voltage of described current detecting pin, and Np is the number of turn of described former limit winding, and Ns is the number of turn of described vice-side winding, and Ri is the resistance of the feedback unit selected in described feedback module.
10. charging system according to claim 6, it is characterized in that, described predetermined charge tunnel comprises the first metal-oxide-semiconductor, second metal-oxide-semiconductor and the 3rd metal-oxide-semiconductor, described charger is connected with described battery with described second metal-oxide-semiconductor by described first metal-oxide-semiconductor, described 3rd metal-oxide-semiconductor is used for the first metal-oxide-semiconductor described in selectivity conducting and described second metal-oxide-semiconductor under the control of described control module, is charged by described predetermined charge tunnel to make described charger to described battery.
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| CN201584801U (en) * | 2009-12-04 | 2010-09-15 | 上海复鑫电源科技有限公司 | Charger output high-frequency electronic switch |
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Application publication date: 20150909 |