CN104253461A - Charging equipment and power supply method thereof - Google Patents
Charging equipment and power supply method thereof Download PDFInfo
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- CN104253461A CN104253461A CN201310269762.7A CN201310269762A CN104253461A CN 104253461 A CN104253461 A CN 104253461A CN 201310269762 A CN201310269762 A CN 201310269762A CN 104253461 A CN104253461 A CN 104253461A
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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
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Abstract
An embodiment of the invention discloses charging equipment which comprises a voltage compensation module. The voltage compensation module comprises a detection circuit, a compensation circuit and a switch power source, the detection circuit is used for detecting output voltage of a voltage output end of the charging equipment and charging voltage reaching a charging end of terminal equipment and comparing a difference value between the output voltage and the charging voltage, the compensation circuit is used for calculating a sum of the output voltage and two times of the difference value to acquire output voltage after compensation, and the switch power source is used for adjusting the output voltage of the charging equipment to enable the output voltage to be equal to the output voltage after compensation. The embodiment of the invention further provides a charging method of the charging equipment. By the charging equipment, the problem of overlarge voltage drop on a charging cable can be solved, and charging current of a charging battery of the terminal equipment is guaranteed to be constant, so that charging efficiency is improved while charging time is reduced.
Description
Technical field
The present invention relates to terminal power supply technique field, particularly relate to the method for supplying power to of a kind of charging device and charging device.
Background technology
Terminal equipment generally uses rechargeable battery to provide electric energy.Rechargeable battery needs regular replenishment electricity, the required power supply of its charging generally by charger to 220V AC conversion.
As shown in Figure 1, be the charger operation schematic diagram of prior art.In prior art, 220V AC conversion is 5V direct voltage by charger 1a, exports terminal equipment 3a to by USB connecting line 2a, for the rechargeable battery of terminal equipment 3a charges.
Because USB connecting line 2a has certain resistance, therefore for prior art shown in Fig. 1, when charging current is larger, the voltage loss on USB connecting line 2a is larger.Such as, suppose that charging current be the unidirectional resistance of 2A, USB connecting line 2a is 0.17ohm(unit of resistance ohm).When charger 1a exports 5V normal voltage, then charger shown in Fig. 1, during incoming terminal equipment 3a, voltage is down to: 5V-2 × 0.17ohm × 2A=4.32V.The rechargeable battery required voltage of terminal equipment 3a is general higher, and most Gao Shike reaches about 4.2V, and the chip of rechargeable battery needs certain pressure reduction to maintain constant current.
Therefore, the charger of prior art, because the voltage loss of charging wire (USB connecting line 2a) is excessive, the pressure reduction of the chip of rechargeable battery may be made not enough, and charged electrical fails to be convened for lack of a quorum more and more less, cannot keep constant.Like this, both reduce charge efficiency, too increase the charging interval.
Summary of the invention
Embodiments provide the method for supplying power to of a kind of charging device and charging device, the problem that in the charge cable that can solve charging device, pressure drop is excessive, ensure that the charging current of the rechargeable battery of terminal equipment is constant, thus improve charge efficiency, reduce the charging interval.
First aspect, provides a kind of charging device, and the voltage output end of described charging device is used for being connected with the charging end of terminal equipment by described charge cable; Described charging device comprises a voltage compensation module;
Described voltage compensation module comprises: testing circuit, compensating circuit and Switching Power Supply;
Described testing circuit, for detecting the output voltage of the voltage output end of described charging device and arriving the charging voltage of charging end of described terminal equipment, compares the difference obtaining described output voltage and described charging voltage;
Described compensating circuit, for calculate the described difference of described output voltage and 2 times and, the output voltage after being compensated;
Described Switching Power Supply, for regulating the output voltage of described charging device, the output voltage after making described output voltage equal described compensation.
In the first possible implementation of first aspect, described voltage compensation module also comprises:
Threshold decision circuit, for the output voltage after more described compensation and the relation between default most high threshold, most high threshold described in if the output voltage after described compensation is more than or equal to, then make the output voltage after described compensation equal described in most high threshold, then export described Switching Power Supply to.
In conjunction with in the first possible implementation of first aspect and first aspect, in the implementation that the second of first aspect is possible, described charge cable comprises: outer shielding layer and ground wire;
One end that described ground wire is connected with the voltage output end of described charging device is first end, and one end that described ground wire is connected with the charging end of described terminal equipment is the second end;
Second end of described ground wire and the outer shielding layer short circuit of described charge cable;
Described testing circuit comprises: differential amplifier;
The normal phase input end of described differential amplifier connects the first end of the ground wire of described charge cable, outer shielding layer described in the anti-phase input termination of described differential amplifier, the input of compensating circuit described in the output termination of described differential amplifier;
Described differential amplifier, for detecting the output voltage of the voltage output end of described charging device and the charging voltage of the charging end of the described terminal equipment of arrival, comparing the difference obtaining described output voltage and described charging voltage, exporting described compensating circuit to.
In conjunction with in the first possible implementation of first aspect and first aspect, in the third possible implementation of first aspect, described charge cable comprises: outer shielding layer and ground wire;
One end that described ground wire is connected with the voltage output end of described charging device is first end, and one end that described ground wire is connected with the charging end of described terminal equipment is the second end;
Second end of described ground wire and the outer shielding layer short circuit of described charge cable;
Described testing circuit comprises: analog to digital converter and microprocessor;
The normal phase input end of described analog to digital converter connects the first end of the ground wire of described charge cable, outer shielding layer described in the anti-phase input termination of described analog to digital converter, the input of microprocessor described in the output termination of described analog to digital converter;
Described analog to digital converter, for the charging voltage of the charging end of the output voltage and described terminal equipment that detect the voltage output end of described charging device, relatively obtain the difference of described output voltage and described charging voltage, and export the digital signal corresponding with described difference to described microprocessor;
Described microprocessor, after processing described difference, exports described compensating circuit to.
Second aspect, provides a kind of method of supplying power to of charging device, and described method comprises:
Detect the output voltage of described charging device and the charging voltage of incoming terminal equipment, compare the difference obtaining described output voltage and described charging voltage;
Calculate the described difference of described output voltage and 2 times and, the output voltage after being compensated;
Regulate the output voltage of described charging device, the output voltage after making described output voltage equal described compensation.
In the first possible implementation of second aspect, after the output voltage after described being compensated, before the output voltage of the described charging device of described adjustment, described method also comprises:
Output voltage after more described compensation and the relation between default most high threshold, if the output voltage after described compensation be more than or equal to described in most high threshold, then make the output voltage after described compensation equal described in most high threshold.
Compared with prior art, in charging device described in the embodiment of the present invention, comprise a voltage compensation module, this module can detect the output voltage of the voltage output end obtaining charging device and the actual charging voltage arriving the charging end of described terminal equipment, by calculating the difference of described output voltage and charging voltage, when can obtain the output voltage incoming terminal equipment of described charging device, voltage loss value in charge cable, then compensate according to the output voltage of this voltage loss value to charging device, when making the output voltage incoming terminal equipment after compensating, still can keep desirable charging voltage value.The problem that in the charge cable that can solve charging device thus, pressure drop is excessive, ensures the pressure reduction of the rechargeable battery of terminal equipment, and the charging current maintaining rechargeable battery is constant, thus improves charge efficiency, reduces the charging interval.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the charger operation schematic diagram of prior art;
Fig. 2 is the structure chart of the charging device of the embodiment of the present invention one;
Fig. 3 is the structure chart of the charging device of the embodiment of the present invention two;
Fig. 4 is the structure chart of the voltage compensation module of the embodiment of the present invention one;
Fig. 5 is the structure chart of the voltage compensation module of the embodiment of the present invention two;
Fig. 6 is the flow chart of the method for supplying power to of the charging device of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, carry out clear, complete description to the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiments provide the method for supplying power to of a kind of charging device and charging device, the problem that in the charge cable that can solve charging device, pressure drop is excessive, ensure that the charging current of the rechargeable battery of terminal equipment is constant, thus improve charge efficiency, reduce the charging interval.
With reference to Fig. 2, it is the structure chart of the charging device described in the embodiment of the present invention one.As shown in Figure 2, the voltage output end of described charging device 10 is used for being connected with the charging end of terminal equipment 30 by described charge cable 20, for described terminal equipment 30 charges.
Charging device 10 described in the embodiment of the present invention comprises a voltage compensation module.Described voltage compensation module comprises: testing circuit 101, compensating circuit 102 and Switching Power Supply 103.
Wherein, the input of compensating circuit 102 described in the output termination of described testing circuit 101; The input of Switching Power Supply 103 described in the output termination of described compensating circuit 102.
Described testing circuit 101, for detecting the output voltage Va of the voltage output end of described charging device 10 and arriving the charging voltage Vc of charging end of described terminal equipment 30, relatively obtain the difference Vac of described output voltage Va and described charging voltage Vc, and export described difference Vac to described compensating circuit 102.
Described compensating circuit 102, for calculate described output voltage Va and 2 times described difference Vac's and, the output voltage Va ＇ after being compensated, and export the output voltage Va ＇ after described compensation to described Switching Power Supply 103.
Concrete, Va ＇=Va+2 × Vac.
Described Switching Power Supply 103, for regulating the output voltage of described charging device 10, the output voltage Va ＇ after making described output voltage equal described compensation.
In charging device described in the embodiment of the present invention, comprise a voltage compensation module, this module can detect the output voltage Va of the voltage output end obtaining the charging device 10 and actual charging voltage Vc arriving the charging end of described terminal equipment 30, by calculating the difference of described output voltage Va and charging voltage Vc, when can obtain the output voltage incoming terminal equipment 30 of described charging device 10, voltage loss value in charge cable 20, then compensate according to the output voltage of this voltage loss value to charging device 10, when making the output voltage incoming terminal equipment 30 after compensating, still can keep desirable charging voltage value.The problem that in the charge cable that can solve charging device 10 thus, pressure drop is excessive, ensures the pressure reduction of the rechargeable battery of terminal equipment, and the charging current maintaining rechargeable battery is constant, thus improves charge efficiency, reduces the charging interval, strengthens Consumer's Experience.
It should be noted that, for the rechargeable battery of terminal equipment 30, its charging voltage generally all has certain most high threshold, and when its charging voltage is higher than described most high threshold, described rechargeable battery likely can be burnt.Such as, the desirable charging voltage of the rechargeable battery of described terminal equipment 30 is generally 5V, and plays most high threshold and be generally 6V to 6.5V.When described charging voltage exceedes this most high threshold, this rechargeable battery is probably burnt.In the embodiment of the present invention, if the output voltage Va ＇ after described compensation exceeded described in most high threshold and directly export described terminal equipment 30 to, then cause described rechargeable battery to be burnt possibly.The embodiment of the present invention two can solve this problem.
With reference to Fig. 3, it is the structure chart of the charging device described in the embodiment of the present invention two.As shown in Figure 3, the charging device of the embodiment of the present invention two and the difference of embodiment one are: the voltage compensation module of described charging device 10 can also comprise a threshold decision circuit 104.
Described threshold decision circuit 104, for the output voltage Va ＇ after more described compensation and the relation between default most high threshold, most high threshold described in if the output voltage Va ＇ after described compensation is less than, then export the output voltage Va ＇ after described compensation to described Switching Power Supply 103; Most high threshold described in if the output voltage Va ＇ after described compensation is more than or equal to, then make the output voltage Va ＇ after described compensation equal described in export described Switching Power Supply 103 again to after most high threshold.
Charging device described in the embodiment of the present invention two, on the basis of embodiment one, also comprise a threshold decision circuit 104, by the output voltage Va ＇ after more described compensation and the relation between default most high threshold, when the output voltage Va ＇ after described compensation is more than or equal to default most high threshold, directly to export described in equaling the output voltage Va ＇ after the compensation of most high threshold to Switching Power Supply 103.Effectively can avoid because compensating the charging voltage caused too high thus, thus cause the rechargeable battery of terminal equipment 30 by the phenomenon of burning, be conducive to the safety in utilization ensureing charging device, strengthen the useful life of terminal equipment 30.
With reference to Fig. 4, it is the structure chart of the voltage compensation module described in the embodiment of the present invention one.Fig. 4 gives a kind of concrete way of realization of the voltage compensation module of the charging device described in the embodiment of the present invention one, for the module of voltage compensation shown in Fig. 4, describes in detail to the operation principle of the charging device described in the embodiment of the present invention.
Under regular situation, described charge cable 20 can comprise: the line group be made up of power line, ground wire, positive voltage data wire and negative voltage data line, the conductive layer being arranged on described line group outside, the insulating barrier being arranged on described conductive layer outside and be arranged on the outer shielding layer of described insulating barrier outside.It can thus be appreciated that each bar circuit in described outer shielding layer and described line group is independent mutually.Because the composition of described charge cable 20 is techniques well known, therefore introduce no longer in detail in the embodiment of the present invention.
In the embodiment of the present invention, one end that the ground wire setting described charge cable 20 is connected with the voltage output end of described charging device 10 is first end, and one end that described ground wire is connected with the charging end of described terminal equipment 30 is the second end.
In the embodiment of the present invention, by second end (being one end that described ground wire is connected with the charging end of described terminal equipment 30) of described ground wire and the outer shielding layer short circuit of described charge cable 20.
Meanwhile, described testing circuit 101 comprises a differential amplifier 1011.The normal phase input end of described differential amplifier 1011 connects the first end (being one end that described ground wire is connected with the voltage output end of described charging device 10) of described ground wire, outer shielding layer described in the anti-phase input termination of described differential amplifier 1011; The input of compensating circuit 102 described in the output termination of described differential amplifier 1011.
Described in the embodiment of the present invention three, other parts of charging device are identical with the embodiment of the present invention one, repeat no more.
The normal phase input end of described differential amplifier 1011 detects the output voltage Va obtaining the voltage output end of described charging device 10, its inverting input detects the charging voltage Vc obtaining the charging end of the described terminal equipment 30 of described arrival, by comparing the difference Vac obtaining described output voltage Va and described charging voltage Vc, and export described compensating circuit 102 to.
The operation principle of the charging device described in composition graphs 4 pairs of embodiment of the present invention three describes in detail.
Concrete, as shown in Figure 4, in one end that described charge cable 20 is connected with described terminal equipment 30, by the ground wire of described charge cable 20 and the outer shielding layer short circuit of described charge cable 20.Make thus, at terminal equipment 30 end, the voltage of described outer shielding layer equals the voltage of the second end of described ground wire; Further, the second end due to described ground wire is connected with the charging end of described terminal equipment 30, and therefore, described outer shielding layer just equals the charging voltage Vc of the charging end of the described terminal equipment 30 of described arrival at the voltage of terminal equipment 30 end.
Owing to having insulating barrier between described outer shielding layer and the line group of described charging cable 20, therefore do not have electric current to flow through in described outer shielding layer, the voltage on described outer shielding layer is equal everywhere.In one end that the charge cable 20 of described charging device is connected with described charging device 10, described outer shielding layer equals the voltage of described outer shielding layer at terminal equipment 30 end at the voltage of charging device 10 end, equals the charging voltage Vc of the charging end of the described terminal equipment 30 of described arrival.
Simultaneously, in one end that described charge cable 20 is connected with described charging device 10, outer shielding layer described in the anti-phase input termination of described differential amplifier 1011, therefore, the reverse inter-input-ing voltage of described differential amplifier 1011 just equals the voltage of described outer shielding layer at charging device 10 end, also just equals the charging voltage Vc of the charging end of the described terminal equipment 30 of described arrival.
And, the normal phase input end of described differential amplifier 1011 connects the first end of described ground wire, simultaneously, the voltage output end of charging device 10 described in first termination of described ground wire, therefore, the positive input voltage of described differential amplifier 1011 just equals the output voltage Va of the voltage output end of described charging device 10.
Described differential amplifier 1011 compares the positive input voltage received and reverse inter-input-ing voltage, obtain the difference of the two, be the difference Vac of described output voltage Va and described charging voltage Vc, during the output voltage incoming terminal equipment 30 of namely charging device 10, the voltage loss value in described charge cable 20.
Then by compensating circuit, compensate according to the output voltage of described voltage loss value to described charging device 10 of 2 times, the output voltage Va ＇ after being compensated.Such as, described output voltage Va is 5V, and calculating described voltage loss value Vac is 0.1V, then the output voltage after described compensation: Va ＇=5V+2 × 0.1V=5.2V.
The output voltage of described charging device 10 is regulated, the output voltage Va ＇ (such as 5.2V) after making described output voltage equal described compensation by described Switching Power Supply 103.As output voltage Va ＇ after the output voltage of this charging device 10 equals described compensation, during the charging end of the output voltage Va ＇ incoming terminal equipment 30 after this compensation, after the line loss of described charge cable 20, its voltage is down to 5V, just in time equal the ideal charging voltage of described terminal equipment 30, meet the charge requirement of described terminal equipment 30.
In the embodiment of the present invention two, by second end (being one end that described ground wire is connected with the charging end of described terminal equipment 30) of the ground wire by described charge cable 20 and the outer shielding layer short circuit of described charge cable 20, utilize the principle that on described outer shielding layer, voltage is equal everywhere, make the voltage on described outer shielding layer equal the charging voltage Vc of the charging end of described terminal equipment 30.The outer shielding layer of charging cable 20 described in the anti-phase input termination of the differential amplifier 1011 that described testing circuit 101 comprises, makes its reverse inter-input-ing voltage equal the charging voltage Vc of the charging end of described terminal equipment 30.Simultaneously, the normal phase input end of described differential amplifier 1011 connects the first end (being one end that described ground wire is connected with the voltage output end of described charging device 10) of described ground wire, and its positive input voltage is the output voltage Va of the voltage output end of described charging device 10.It can thus be appreciated that, the positive input voltage of described differential amplifier 1011 and reverse inter-input-ing voltage are respectively described ground wire and are positioned at the voltage that the voltage of described charging device 10 end and described ground wire are positioned at described terminal equipment 30 end, by more described positive input voltage and reverse inter-input-ing voltage, both the voltage difference at described ground wire two ends can have been obtained, the voltage loss value in this difference i.e. described charge cable 20.Utilize the output voltage of this voltage loss value to charging device 10 to compensate, when can make the output voltage incoming terminal equipment 30 after compensating, still can keep desirable charging voltage value.The problem that in the charge cable that can solve charging device thus, pressure drop is excessive, ensures the pressure reduction of the rechargeable battery of terminal equipment, and the charging current maintaining rechargeable battery is constant, thus improves charge efficiency, reduces the charging interval, strengthens Consumer's Experience.
Certainly, for the charging device described in the embodiment of the present invention three shown in Fig. 4, may further include threshold decision circuit too.
Described threshold decision circuit, for the output voltage Va ＇ after more described compensation and the relation between default most high threshold, most high threshold described in if the output voltage Va ＇ after described compensation is less than, then export the output voltage Va ＇ after described compensation to described Switching Power Supply 103; Most high threshold described in if the output voltage Va ＇ after described compensation is more than or equal to, then make the output voltage Va ＇ after described compensation equal described in export described Switching Power Supply 103 again to after most high threshold.
In this embodiment, by the output voltage Va ＇ after more described compensation and the relation between default most high threshold, when the output voltage Va ＇ after described compensation is more than or equal to default most high threshold, directly to export described in equaling the output voltage Va ＇ after the compensation of most high threshold to Switching Power Supply 103.Effectively can avoid because compensating the charging voltage caused too high thus, thus cause the rechargeable battery of terminal equipment 30 by the phenomenon of burning, be conducive to the safety in utilization ensureing charging device, strengthen the useful life of terminal equipment 30.
With reference to Fig. 5, it is the structure chart of the voltage compensation module described in the embodiment of the present invention two.Fig. 5 gives the another kind of the voltage compensation module of the charging device described in the embodiment of the present invention concrete way of realization.
The difference of charging device and embodiment three described in embodiment illustrated in fig. 5 four is: described testing circuit 101 comprises analog to digital converter 1012 and microprocessor 1013.
The normal phase input end of described analog to digital converter 1012 connects the first end (being one end that described ground wire 202 is connected with the voltage output end of described charging device 10) of described ground wire, outer shielding layer described in the anti-phase input termination of described analog to digital converter 1013; The input of microprocessor 1013 described in the output termination of described analog to digital converter 1013.
The input of compensating circuit 102 described in the output termination of described microprocessor 1013.
Described in the embodiment of the present invention four, other parts of charging device are identical with the embodiment of the present invention three, repeat no more.
Concrete, the normal phase input end of described analog to digital converter 1012 detects the output voltage Va obtaining the voltage output end of described charging device 10, its inverting input detects the charging voltage Vc obtaining the charging end of the described terminal equipment 30 of described arrival, by comparing the difference Vac obtaining described output voltage Va and described charging voltage Vc, and export the digital signal corresponding with described difference Vac to described microprocessor 1013.
After described microprocessor 1013 processes accordingly to described difference Vac, then export described compensating circuit 102 to.
Compared with the charging device described in embodiment three, described in embodiment four, the advantage of charging device is: the difference Vac comparing described output voltage Va and the described charging voltage Vc obtained can be converted to digital signal by analog to digital converter 1012 and export microprocessor 1013 to, introduce corresponding optimized algorithm by described microprocessor 1013, after respective handling is carried out to described difference Vac, export described compensating circuit 102 again to.Such as, when system initial stage circuit state less stable, increase corresponding delay process, realize progressive adjustment, to avoid the problem etc. adjusting overshoot.Can make thus, more stable to the adjustment of the output voltage of described charging device, ensure the safety and stability into terminal equipment 30 charging process.
Certainly, previous embodiment is only the concrete ways of realization of two kinds of the voltage compensation module giving charging device.In actual applications, described voltage compensation module also can be realized by other circuit form.
Corresponding to the charging device that the embodiment of the present invention provides, the embodiment of the present invention also provides a kind of method of supplying power to of charging device.Described charging device provides charge power supply for terminal equipment.
With reference to Fig. 6, it is the flow chart of the method for supplying power to of the charging device described in the embodiment of the present invention.As shown in Figure 6, described method can comprise the following steps:
Step S601: detect the output voltage Va of described charging device and the charging voltage Vc of incoming terminal equipment, compare the difference Vac obtaining described output voltage Va and described charging voltage Vc.
Step S602: calculate the described difference Vac of described output voltage Va and 2 times and, the output voltage Va ＇ after being compensated.
Concrete, Va ＇=Va+2 × Vac.
Step S603: the output voltage regulating described charging device, the output voltage Va ＇ after making described output voltage equal described compensation.
In the method for supplying power to of charging device described in the embodiment of the present invention, detect the output voltage Va and the actual charging voltage Vc arriving described terminal equipment that obtain charging device, by calculating the difference of described output voltage Va and charging voltage Vc, when can obtain the output voltage incoming terminal equipment of described charging device, voltage loss value in charge cable, then compensate according to the output voltage of this voltage loss value to charging device, when making the output voltage incoming terminal equipment after compensating, still can keep desirable charging voltage value.The problem that in the charge cable that can solve charging device thus, pressure drop is excessive, ensures the pressure reduction of the rechargeable battery of terminal equipment, and the charging current maintaining rechargeable battery is constant, thus improves charge efficiency, reduces the charging interval, strengthens Consumer's Experience.
It should be noted that, for the rechargeable battery of terminal equipment, its charging voltage generally all has certain most high threshold, and when its charging voltage is higher than described most high threshold, described rechargeable battery likely can be burnt.Such as, the desirable charging voltage of the rechargeable battery of described terminal equipment is generally 5V, and plays most high threshold and be generally 6V to 6.5V.When described charging voltage exceedes this most high threshold, this rechargeable battery is probably burnt.In the embodiment of the present invention, if the output voltage Va ＇ after described compensation exceeded described in most high threshold and directly export described terminal equipment to, then cause described rechargeable battery to be burnt possibly.The following embodiment of the present invention can solve this problem.
Preferably, method described in the embodiment of the present invention is after step S602, before step S603, can also comprise: the output voltage Va ＇ after more described compensation and the relation between default most high threshold, most high threshold described in if the output voltage Va ＇ after described compensation is more than or equal to, then make the output voltage Va ＇ after described compensation equal described in most high threshold.
In above-described embodiment, by the output voltage Va ＇ after more described compensation and the relation between default most high threshold, when the output voltage Va ＇ after described compensation is more than or equal to default most high threshold, directly to export described in equaling the output voltage Va ＇ after the compensation of most high threshold.Effectively can avoid because compensating the charging voltage caused too high thus, thus cause the rechargeable battery of terminal equipment by the phenomenon of burning, be conducive to the safety in utilization ensureing charging device, strengthen the useful life of terminal equipment.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that disclosed system, apparatus and method can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (6)
1. a charging device, is characterized in that, the voltage output end of described charging device is used for being connected with the charging end of terminal equipment by described charge cable; Described charging device comprises a voltage compensation module;
Described voltage compensation module comprises: testing circuit, compensating circuit and Switching Power Supply;
Described testing circuit, for detecting the output voltage of the voltage output end of described charging device and arriving the charging voltage of charging end of described terminal equipment, compares the difference obtaining described output voltage and described charging voltage;
Described compensating circuit, for calculate the described difference of described output voltage and 2 times and, the output voltage after being compensated;
Described Switching Power Supply, for regulating the output voltage of described charging device, the output voltage after making described output voltage equal described compensation.
2. charging device according to claim 1, is characterized in that, described voltage compensation module also comprises:
Threshold decision circuit, for the output voltage after more described compensation and the relation between default most high threshold, most high threshold described in if the output voltage after described compensation is more than or equal to, then make the output voltage after described compensation equal described in most high threshold, then export described Switching Power Supply to.
3. charging device according to claim 1 and 2, is characterized in that, described charge cable comprises: outer shielding layer and ground wire;
One end that described ground wire is connected with the voltage output end of described charging device is first end, and one end that described ground wire is connected with the charging end of described terminal equipment is the second end;
Second end of described ground wire and the outer shielding layer short circuit of described charge cable;
Described testing circuit comprises: differential amplifier;
The normal phase input end of described differential amplifier connects the first end of the ground wire of described charge cable, outer shielding layer described in the anti-phase input termination of described differential amplifier, the input of compensating circuit described in the output termination of described differential amplifier;
Described differential amplifier, for detecting the output voltage of the voltage output end of described charging device and the charging voltage of the charging end of the described terminal equipment of arrival, comparing the difference obtaining described output voltage and described charging voltage, exporting described compensating circuit to.
4. charging device according to claim 1 and 2, is characterized in that, described charge cable comprises: outer shielding layer and ground wire;
One end that described ground wire is connected with the voltage output end of described charging device is first end, and one end that described ground wire is connected with the charging end of described terminal equipment is the second end;
Second end of described ground wire and the outer shielding layer short circuit of described charge cable;
Described testing circuit comprises: analog to digital converter and microprocessor;
The normal phase input end of described analog to digital converter connects the first end of the ground wire of described charge cable, outer shielding layer described in the anti-phase input termination of described analog to digital converter, the input of microprocessor described in the output termination of described analog to digital converter;
Described analog to digital converter, for the charging voltage of the charging end of the output voltage and described terminal equipment that detect the voltage output end of described charging device, relatively obtain the difference of described output voltage and described charging voltage, and export the digital signal corresponding with described difference to described microprocessor;
Described microprocessor, after processing described difference, exports described compensating circuit to.
5. a method of supplying power to for charging device, is characterized in that, described method comprises:
Detect the output voltage of described charging device and the charging voltage of incoming terminal equipment, compare the difference obtaining described output voltage and described charging voltage;
Calculate the described difference of described output voltage and 2 times and, the output voltage after being compensated;
Regulate the output voltage of described charging device, the output voltage after making described output voltage equal described compensation.
6. method according to claim 5, is characterized in that, after the output voltage after described being compensated, before the output voltage of the described charging device of described adjustment, described method also comprises:
Output voltage after more described compensation and the relation between default most high threshold, if the output voltage after described compensation be more than or equal to described in most high threshold, then make the output voltage after described compensation equal described in most high threshold.
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| CN105932748A (en) * | 2016-06-24 | 2016-09-07 | 北京奇虎科技有限公司 | Charging method, charger and charging system of variable charging voltage |
| CN106100028A (en) * | 2016-06-27 | 2016-11-09 | 深圳天珑无线科技有限公司 | Charger and charging circuit |
| CN106936293A (en) * | 2015-12-28 | 2017-07-07 | 研祥智能科技股份有限公司 | A kind of power supply adaptor and its output voltage regulation circuit and adjusting method |
| WO2017180354A1 (en) * | 2016-04-11 | 2017-10-19 | Microsoft Technology Licensing, Llc | Smart senses for direct charging |
| CN108767522A (en) * | 2018-05-28 | 2018-11-06 | 南昌华勤电子科技有限公司 | Mobile terminal and USB data line |
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| CN108808685A (en) * | 2018-03-26 | 2018-11-13 | 北京航天发射技术研究所 | A kind of digital compensation system of supply voltage and method |
| CN108767522A (en) * | 2018-05-28 | 2018-11-06 | 南昌华勤电子科技有限公司 | Mobile terminal and USB data line |
| CN113765177A (en) * | 2021-07-30 | 2021-12-07 | 华为数字能源技术有限公司 | Battery module and charging system |
| CN113765177B (en) * | 2021-07-30 | 2024-06-11 | 华为数字能源技术有限公司 | Battery module and charging system |
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