CN111884277A - Charging control method and device, control chip and mobile charging device - Google Patents
Charging control method and device, control chip and mobile charging device Download PDFInfo
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- CN111884277A CN111884277A CN202010312945.2A CN202010312945A CN111884277A CN 111884277 A CN111884277 A CN 111884277A CN 202010312945 A CN202010312945 A CN 202010312945A CN 111884277 A CN111884277 A CN 111884277A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The invention provides a charging control method and device, a chip and a mobile charging device. The charging control method comprises the following steps: when the battery voltage V of the mobile deviceiSatisfy V'<Vi<V', the following steps are performed: s210, controlling the mobile charging device to charge at an initial charging voltage V1Charging the mobile device as a current charging voltage, V1<Vmax(ii) a S220, obtaining the current charging current I of the mobile charging devicec(ii) a S230, judgment IcWhether or not to satisfy IcIf not, executing S240, and increasing the charging voltage of the mobile charging device; and S250, judging whether a constant voltage charging condition is met, if not, returning to S230, if so, executing S260 and controlling the mobile charging device to perform constant voltage charging. According to the charging control method provided by the invention, the charging voltage can be matched with the charging current in real time, the charging efficiency is greatly improved while the charging effect is ensured, and the chargeable times of the mobile charging device are increased.
Description
Technical Field
The invention relates to the technical field of charging, in particular to a charging control method and device, a control chip, a computer readable storage medium, a mobile charging device and a wireless earphone set.
Background
Charging a mobile terminal using a mobile power supply generally includes performing trickle charging, constant current charging, and constant voltage charging in this order. The existing mobile power supply has the problems of low charging efficiency and too fast self electric quantity dissipation, and in order to ensure the charging times of the mobile power supply, the self capacity of the mobile power supply is bound to be increased, so that the cost is increased.
Disclosure of Invention
Based on the above situation, the present invention is directed to a charging control method and apparatus, a control chip, a computer readable storage medium, a mobile charging apparatus, and a wireless headset set, so as to solve the problems of low charging efficiency and fast dissipation of electric energy of the mobile charging apparatus.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a charging control method is used for controlling a mobile charging device to charge a mobile device, and the maximum charging voltage of the mobile charging device is VmaxThe charging control method comprises the following steps: when the battery voltage V of the mobile deviceiSatisfy V'<Vi<V', the following steps are performed:
s210, controlling the mobile charging device to charge at an initial charging voltage V1Charging the mobile device as a current charging voltage, V1<Vmax；
S220, obtaining the current charging current I of the mobile charging devicec；
S230, judgment IcWhether or not to satisfy IcIf the current charging voltage V is larger than or equal to I', maintaining the current charging voltage V of the mobile charging device1Otherwise, executing S240;
s240, increasing the charging voltage of the mobile charging device;
s250, judging whether a constant voltage charging condition is met, if so, executing S260, otherwise, returning to S230;
s260, controlling the mobile charging device to perform constant-voltage charging;
wherein, V ' is the lower limit value of the preset voltage, V ' is the upper limit value of the preset voltage, and I ' is the lower limit value of the preset current.
Preferably, in step S250, the constant voltage charging condition includes: after a predetermined time after the boosting operation Ic<I’。
Preferably, in step S250, the constant voltage charging condition includes: the current charging voltage reaches the maximum charging voltage Vmax。
Preferably, in the step S260, the mobile charging device is controlled to perform constant voltage charging at a current charging voltage.
Preferably, when the battery voltage V of the mobile device is aboveiWhen the charging voltage is less than or equal to V', the mobile charging device is controlled to perform trickle charging on the mobile equipment, and the charging voltage of the trickle charging is VtInitial charging voltage V1>Vt。
Preferably, the step-up value Δ V is performed every time the step S240 is performed1Are all equal; alternatively, the first and second electrodes may be,
in a charging process, the step S240 is executed each time1And gradually increases.
Preferably, the preset current lower limit value I' meets 85% Is≤I’≤95％Is，IsCharging saturation current for the mobile charging device.
Preferably, the initial charging voltage V1＝Vi+ΔV2，ΔV2Is the second preset boost value.
A charge control device for controllingCharging the mobile equipment by the mobile charging device, wherein the maximum charging voltage of the mobile charging device is VmaxThe charging control device comprises a control unit, a current detection unit for detecting the charging current of the mobile charging device to the mobile equipment, and a power supply management unit for controlling the charging voltage of the mobile charging device;
the control unit is used for controlling the battery voltage V of the mobile equipmentiSatisfy V'<Vi<V ", the following control is executed:
controlling a mobile charging device to an initial charging voltage V by the power management unit1Charging the mobile device as a current charging voltage, V1<Vmax；
When the current detection unit detects the current charging current I of the mobile charging devicec<When I' is detected, the power management unit is controlled to carry out boosting operation;
when the constant voltage charging condition is met, controlling the mobile charging device to perform constant voltage charging;
wherein, V ' is the lower limit value of the preset voltage, V ' is the upper limit value of the preset voltage, and I ' is the lower limit value of the preset current.
Preferably, the constant voltage charging condition includes: after a predetermined time after the boosting operation Ic<I’。
Preferably, the constant voltage charging condition includes: the current charging voltage reaches the maximum charging voltage Vmax。
Preferably, the control unit is configured to control the mobile charging device to perform constant-voltage charging at the current charging voltage when a constant-voltage charging condition is satisfied.
Preferably, the control unit is further configured to determine the battery voltage V of the mobile deviceiWhen the charging voltage is less than or equal to V', the mobile charging device is controlled to perform trickle charging on the mobile equipment, and the charging voltage of the trickle charging is Vt，V1>Vt。
Preferably, the power management unit boosts the voltage value Δ V per boosting operation1Are all equal; alternatively, the first and second electrodes may be,
a step-up value Δ V of a step-up operation of the power management unit during one charge1The increase is gradual.
Preferably, the preset current lower limit value I' meets 85% Is≤I’≤95％Is，IsCharging saturation current for the mobile charging device.
Preferably, the initial charging voltage V1＝Vi+ΔV2，ΔV2Is the second preset boost value.
Preferably, the current detection unit is further configured to determine the current charging current I detected by the current detection unitcWhether the current is less than the preset current lower limit value I' or not, and when the current charging current I is detectedcAnd when the current is smaller than the preset current lower limit value I', a feedback signal is sent to the control unit.
Preferably, one or two or all of the control unit, the current detection unit, and the power management unit in the charge control device are provided in one chip.
A control chip comprises a control unit, and the control unit can realize the charging control method.
Preferably, the charging device further comprises a current detection unit for detecting the current charging current I of the mobile charging devicec，
The current detection unit is also used for detecting the current charging current IcSending the data to the control unit; alternatively, the first and second electrodes may be,
the current detection unit is also used for judging IcWhether or not less than I', and when Ic<When I' is detected, information is fed back to the control unit.
Preferably, the mobile charging device further comprises a power management unit, wherein the power management unit is used for controlling the charging voltage of the mobile charging device according to the control signal sent by the control unit.
A computer-readable storage medium having stored thereon a computer program which, when executed, implements a charging control method as described above.
A mobile charging apparatus for charging a mobile device, the mobile charging apparatus comprising a computer-readable storage medium as described above, or the mobile charging apparatus comprising a control chip as described above, or the mobile charging apparatus comprising a charging control apparatus as described above.
Preferably, the mobile charging device is a charging box, and the mobile device is a wireless headset.
A wireless headset kit comprising a charging box and a wireless headset, the charging box comprising a computer readable storage medium as described above, or the charging box comprising a control chip as described above, or the charging box comprising a charging control device as described above.
According to the charging control method provided by the invention, the charging voltage can be adjusted according to the charging current of the mobile charging device, so that the charging voltage can be matched with the charging current in real time, the charging efficiency is greatly improved while the charging effect is ensured, the chargeable times of the mobile charging device are increased, and better use experience is provided for users.
Other advantages of the present invention will be described in the detailed description, and those skilled in the art will understand the technical features and technical solutions presented in the description.
Drawings
Preferred embodiments of a charging control method and apparatus, a chip, and a mobile charging apparatus according to the present invention will be described below with reference to the accompanying drawings. In the figure:
fig. 1 is a flowchart of a charging control method according to a preferred embodiment of the present invention;
fig. 2 is a flowchart of a charging control method according to another preferred embodiment of the present invention;
fig. 3 is a flowchart of a charging control method according to still another preferred embodiment of the present invention;
fig. 4 is a system block diagram of a charging box according to the present invention;
FIG. 5 is a schematic diagram illustrating the variation of charging current and charging voltage according to a preferred embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating the variation of charging current and charging voltage according to another preferred embodiment of the present invention;
fig. 7 is a schematic structural diagram of a charge control device according to a preferred embodiment of the present invention.
1. A charging box;
10. a control unit; 20. a power management unit; 30. a current detection unit;
100. a control unit; 200. a power management unit; 300. a current detection unit.
Detailed Description
The applicant finds that, in the existing charging process, the output voltage value of the mobile power supply is constant in the constant-current charging stage, and the maximum output voltage is usually adopted for constant-current charging, but when the charging is actually performed, the voltage difference between the output voltage and the mobile device is large at the initial stage of the constant-current charging stage, and the excessive voltage difference is dissipated through power heating, for example, the maximum output voltage of the mobile power supply is 5V, when the current voltage of the mobile device is 3V, the actual charging voltage of 3.6V can meet the constant-current charging requirement of the mobile device, that is, the charging voltage of 3.6V can obtain the current value during constant-current charging, and the output voltage of the mobile power supply during constant-current charging is 5V, which causes the power heating dissipation of the voltage difference of 1.4V. This is the reason that current portable power source charges the charging efficiency inefficiency, self electric quantity dissipates too fast.
Based on the problems that the existing mobile power supply can not output fixed voltage values at each stage, can not achieve optimal efficiency matching, and needs to dissipate redundant power through heating, the invention provides a charging control method for controlling a mobile charging device to charge mobile equipment, wherein the maximum charging voltage of the mobile charging device is VmaxAs shown in fig. 1, the charging control method includes: when the voltage V of the mobile deviceiSatisfy V'<Vi<At the time of V', the reaction mixture is,the following steps are carried out:
s210, controlling the mobile charging device to charge at an initial charging voltage V1Charging the mobile device as a current charging voltage, V1<Vmax；
S220, obtaining the current charging current I of the mobile charging devicec；
S230, judgment IcWhether or not to satisfy IcIf yes, the current charging voltage V of the mobile charging device is maintained1Otherwise, executing S240;
s240, increasing the charging voltage of the mobile charging device;
s250, judging whether a constant voltage charging condition is met, if so, executing S260, otherwise, returning to S230;
s260, controlling the mobile charging device to perform constant-voltage charging;
wherein, V ' is the lower limit value of the preset voltage, V ' is the upper limit value of the preset voltage, and I ' is the lower limit value of the preset current.
Wherein the voltage V of the mobile deviceiSatisfy V'<Vi<V "corresponds approximately to the constant current charging phase of the existing charging process, i.e. V 'and V" correspond approximately to the voltage terminals of the existing constant current charging phase, e.g. V' is 3V and V "is 4.2V. In particular, when the voltage V of the mobile deviceiStarting to enter a constant current charging stage when a preset voltage lower limit value V' is reached, and starting to enter a constant current charging stage when the voltage V of the mobile equipment is reachediAnd exiting the constant current charging stage when the preset voltage upper limit value is reached. The charging process of the conventional constant-current charging stage is mainly improved, and in the charging stage, the charging voltage of the mobile charging device is adjusted according to the current charging current of the mobile charging device, and the charging voltage of the mobile charging device is gradually increased, so that the charging voltage of the mobile charging device just meets the charging current requirement of the mobile equipment, unnecessary waste of electric energy is avoided, the charging efficiency is greatly improved, the chargeable times of the mobile charging device are increased, and better use experience is provided for users.
Therein, moveBattery voltage V of the deviceiWhether or not to satisfy V'<Vi<The judgment process of V "may be carried out at the mobile device, and the judgment result is sent to the mobile charging device, or the mobile device sends the current battery voltage to the mobile charging device, and the mobile charging device carries out the corresponding judgment. When the mobile device is a plurality of mobile devices, for example, when the mobile device is an earphone, two earphones are usually charged simultaneously, at this time, both earphones may be in communication connection with the mobile charging device to perform the above-mentioned determination and information transmission process, or the two earphones may be divided into a master earphone and a slave earphone, the master earphone directly communicates with the mobile charging device, and the slave earphone transmits the relevant information to the master earphone to communicate with the mobile charging device through the master earphone.
In step S210, after the mobile device is connected to the mobile charging device, the mobile charging device charges the mobile charging device with an initial charging voltage V lower than the maximum charging voltage1Charging the mobile device with an initial charging voltage V1Can be determined according to the battery voltage when the mobile equipment is connected into the mobile charging device, so that the initial charging voltage V is lower than the current battery voltage1Can just meet the charging current requirement of the mobile device, specifically, the initial charging voltage V1Can be represented by formula V1＝Vi+ΔV2To obtain wherein ViRefers to the current battery voltage, Δ V, of the mobile device2The second preset boost value may be preset, for example, 0.1V, or may be calculated according to a charging current required by the mobile device and a resistance on the charging line.
In step S220, the current charging current I of the mobile charging devicecThe current detection unit on the mobile charging device side may detect the current, or the mobile device side may detect the current charging current and transmit the current charging current to the mobile charging device.
In step S230, I 'is a preset current lower limit value, I' cannot be too large or too small, too small may affect the charging efficiency, and too large may cause frequent boost control and affect the reliability of the charging process, and preferably, it is presetThe current lower limit value I' meets 85 percent Is≤I’≤95％Is，IsCharging saturation current for the mobile charging device. For example, when IsAt 50mA, I' may be 45 mA.
In step S240, the step-up value Δ V of the charging voltage1It may be preset that the step-up value Δ V is performed every time step S240 is executed1They may all be equal, for example, they may be boosted by 0.1V each time step S240 is executed, or the boosted value Δ V may be determined according to the current battery voltage of the mobile device1Since the charging is more difficult the later the charging, in order to avoid frequent boosting operation, it is preferable that the boosted voltage value Δ V of step S240 is performed each time during one charging1Increasing gradually, i.e. each time the boost value Δ V1Higher boost value Δ V than the previous time1Or the step-up value Δ V is increased every time step S240 is executed several times1Increase some, more be favorable to guaranteeing the stability of later stage charging process like this.
In step S250, the constant-voltage charging condition includes, for example, I after a predetermined time after the boosting operationc<I', i.e. the charging current is still continuously decreasing after the boosting operation, indicates that the constant voltage charging phase is entered. As another example, the charging voltage has been boosted to a maximum charging voltage VmaxThen the constant voltage charging phase can be entered. For another example, the existing determination method may be adopted, that is, when the battery voltage of the mobile device has reached a predetermined value, for example, 4.2V, the control enters the constant voltage charging phase. As long as one of the above conditions is satisfied, that is, the control is performed to enter the constant voltage charging stage, only one or two of the above conditions may be selected as the basis for determining whether to enter the constant voltage charging stage.
For example, in a preferred embodiment, as shown in FIG. 2, when the battery voltage V of the mobile device is lowiSatisfy V'<Vi<V', the following steps are performed:
s210, controlling the mobile charging device to charge at an initial charging voltage V1Charging the mobile device as a current charging voltage, V1<Vmax；
S220, obtaining the current charging current I of the mobile charging devicec；
S230, judgment IcWhether or not to satisfy IcIf the current charging voltage V is larger than or equal to I', maintaining the current charging voltage V of the mobile charging device1Otherwise, executing S240;
s240, increasing the charging voltage of the mobile charging device;
s252, timing, and judging whether the timing duration is greater than or equal to the preset time, if not, continuing timing and judging, and if so, executing S253;
s253, judging whether I is satisfiedc<If yes, executing S260, otherwise returning to S230;
and S260, controlling the mobile charging device to perform constant-voltage charging.
For another example, in another preferred embodiment, as shown in FIG. 3, when the battery voltage V of the mobile device is aboveiSatisfy V'<Vi<V', the following steps are performed:
s210, controlling the mobile charging device to charge at an initial charging voltage V1Charging the mobile device as a current charging voltage, V1<Vmax；
S220, obtaining the current charging current I of the mobile charging devicec；
S230, judgment IcWhether or not to satisfy IcIf the current charging voltage V is larger than or equal to I', maintaining the current charging voltage V of the mobile charging device1Otherwise, executing S240;
s240, increasing the charging voltage of the mobile charging device;
s251, judging that the current charging voltage reaches the maximum charging voltage VmaxIf yes, executing S260, otherwise executing S252;
s252, timing, and judging whether the timing duration is greater than or equal to the preset time, if not, continuing timing and judging, and if so, executing S253;
s253, judging whether I is satisfiedc<If yes, executing S260, otherwise returning to S230;
and S260, controlling the mobile charging device to perform constant-voltage charging.
In step S260, the charging voltage for constant voltage charging may be the maximum charging voltage VmaxPreferably, in step S260, the mobile charging device is controlled to perform constant voltage charging at the current charging voltage, where the charging voltage is an optimal charging voltage that is obtained through step-by-step boosting and feedback control of the charging current and can meet the requirement of constant voltage charging, and in many cases, the voltage value is smaller than the maximum charging voltage value, so that the charging efficiency in the constant voltage charging stage can be further improved, the chargeable frequency of the mobile charging device can be increased, and unnecessary energy waste can be reduced. It can be understood that, actually, the charging voltage before the current step-up may already enter the constant voltage charging phase, and it can be determined whether to enter the constant voltage charging phase only after the step-up needs to be performed once due to the limitation of the control logic, so in step S260, the current charging voltage may also be controlled to be reduced to the voltage before the current step-up operation, and then enter the constant voltage charging phase with the reduced voltage.
When the battery voltage V of the mobile deviceiWhen V 'is less than or equal to V', the battery of the mobile device is prevented from being impacted by large current, and the mobile charging device is controlled to perform trickle charging on the mobile device. That is, when the battery voltage of the mobile device is low, the trickle charge is first performed up to V after the mobile charging device is connected theretoi>When the battery voltage of the mobile device is greater than V', the charging control process can be directly executed after the mobile device is connected to the mobile charging device. Wherein the trickle charge has a charging voltage of VtInitial charging voltage V1>Vt。
The whole charging process is specifically described below by taking the charging box as an example to charge the wireless headset:
as shown in fig. 4, the charging box 1 includes a control unit 10, a power management unit 20 and a current detection unit 30, the current detection unit 30 is used for detecting the current of the charging output port of the charging box 1, the power management unit 20 is used for controlling the charging voltage of the charging box 1, and the control unit 10 is used for controlling the charging process of the charging box 1. The maximum charging voltage of the charging box 1 is 5V, the charging current saturation value is 50mA, the preset current lower limit value I' is 45mA, when the charging current detected by the current detection unit 30 decreases to 45mA, a signal is fed back to the control unit 10, the control unit 10 sends a boosting instruction to the power management unit 20 according to the fed back signal, and the power management unit 20 performs the charging voltage boosting operation according to the preset boosting value. The control unit 10, the power management unit 20 and the current detection unit 30 form a feedback closed loop system to optimize the charging process.
Specifically, as shown in fig. 5, before the time period t1, trickle charging is performed with a charging voltage of 3V, and when the output charging voltage of the charging box terminal is 3.1V during the time period t1, and the detected charging current is 48mA, the current detection unit 30 does not feed back a signal to the control unit, and continuously maintains the 3.1V charging.
When the output charging voltage of the charging box end is 3.1V in the time period t1, and the detected charging current is 45mA, at this time, the current detection unit 30 feeds back 1 signal to the control unit 10, after receiving the feedback signal, the control unit 10 sends a command of "boost 0.1V" to the power management unit 20, and the power management unit 20 performs the charging voltage boosting operation, and the charging enters the time period t 2.
By analogy, the charging box terminal performs the boosting operation of the charging voltage once every time the charging current detected by the current detecting unit 30 is lower than the preset current value of 45 mA.
When the output charging voltage of the charging box end is 4.7V in the tn-1 time period, when the detected charging current is 45mA, at this time, the current detection unit 30 feeds back 1 signal to the control unit 10, the control unit 10 sends a command of "boost 0.1V" to the power management unit 20 after receiving the feedback signal, and the power management unit 20 performs the charging voltage boosting operation and charges the battery into the tn time period.
When the output charging voltage of the charging box terminal is 4.8V in the tn period, when the detected charging current is 44mA, the current detection unit 30 detects that the charging current has broken down by 45mA, the current detection unit 30 feeds back the signal to the control unit 10, and the control unit 10 controls the charging voltage of 4.8V to enter the constant voltage charging phase.
Of course, it is understood that the control unit 10 may also control to increase the charging voltage to the maximum output charging voltage and then enter the constant voltage charging phase, specifically, as shown in fig. 6, when the output charging voltage of the charging box end is 4.8V in the tn period, when the detected charging current is 44mA, the current detection unit 30 detects that the charging current has broken down by 45mA, the current detection unit 30 feeds the signal back to the control unit 10, the control unit 10 sends an instruction of "boost 0.1V" to the power management unit 20, and the power management unit 20 performs the charging voltage boosting operation, so that the charging voltage reaches 4.9V; since the charging current is lower than 45mA, the charging voltage continues to be boosted according to the charging current value detected again by the current detection unit 30 until the maximum output charging voltage of 5V is reached, and the constant voltage charging stage is entered.
The invention also provides a charging control device for controlling the mobile charging device to charge the mobile equipment, wherein the maximum charging voltage of the mobile charging device is VmaxAs shown in fig. 7, the charging control apparatus includes a control unit 100, a current detection unit 300, and a power management unit 200, where the current detection unit 300 is configured to detect a charging current of the mobile charging apparatus to the mobile device, and the power management unit 200 is configured to control a charging voltage of the mobile charging apparatus.
The control unit 100 is used for controlling the battery voltage V of the mobile deviceiSatisfy V'<Vi<V ", the following control is executed:
controlling a mobile charging device to an initial charging voltage V by the power management unit 2001Charging the mobile device as a current charging voltage;
when the current detection unit 300 detects the present charging current I of the mobile charging devicec<When the voltage I' is higher than the reference voltage, the power management unit 200 is controlled to perform the boosting operation;
controlling the mobile charging device to perform constant-voltage charging when a constant-voltage charging condition is met;
wherein, V ' is the lower limit value of the preset voltage, V ' is the upper limit value of the preset voltage, and I ' is the lower limit value of the preset current.
Wherein the voltage V of the mobile deviceiSatisfy V'<Vi<V "corresponds approximately to the constant current charging phase of the existing charging process, i.e. V 'and V" correspond approximately to the voltage terminals of the existing constant current charging phase, e.g. V' is 3V and V "is 4.2V. In particular, when the voltage V of the mobile deviceiStarting to enter a constant current charging stage when a preset voltage lower limit value V' is reached, and starting to enter a constant current charging stage when the voltage V of the mobile equipment is reachediAnd exiting the constant current charging stage when the preset voltage upper limit value is reached. In the invention, the charging process of the existing constant-current charging stage is mainly improved, and in the stage, the charging strategy of the invention is that when the charging current detected by the current detection unit 300 is reduced to reach I', the control unit 100 sends a boosting instruction to the power management unit 200, and the power management unit 200 performs charging voltage boosting operation according to a preset boosting value, so that the charging voltage of the mobile charging device just can meet the charging current requirement of the mobile equipment, and unnecessary electric energy waste is avoided, thereby greatly improving the charging efficiency, increasing the chargeable times of the mobile charging device, and providing better use experience for users.
Wherein the battery voltage V of the mobile deviceiWhether or not to satisfy V'<Vi<The judgment process of V "may be carried out at the mobile device, and the judgment result is sent to the mobile charging device, or the mobile device sends the current battery voltage to the mobile charging device, and the mobile charging device carries out the corresponding judgment. When the mobile device is a plurality of mobile devices, for example, when the mobile device is an earphone, two earphones are usually charged simultaneously, at this time, both earphones may be in communication connection with the mobile charging device to perform the above-mentioned determination and information transmission process, or the two earphones may be divided into a master earphone and a slave earphone, the master earphone directly communicates with the mobile charging device, and the slave earphone transmits the relevant information to the master earphone to communicate with the mobile charging device through the master earphone.
When the mobile device is accessedAfter the mobile charging device is moved, the mobile charging device is charged at an initial charging voltage V lower than the maximum charging voltage1Charging the mobile device with an initial charging voltage V1Can be determined according to the battery voltage when the mobile equipment is connected into the mobile charging device, so that the initial charging voltage V is lower than the current battery voltage1Can just meet the charging current requirement of the mobile device, specifically, the initial charging voltage V1Can be represented by formula V1＝Vi+ΔV2To obtain wherein ViRefers to the current battery voltage, Δ V, of the mobile device2The second preset boost value may be preset, for example, 0.1V, or may be calculated according to a charging current required by the mobile device and a resistance on the charging line.
I ' is a preset current lower limit value, I ' cannot be too large or too small, too small affects charging efficiency, too large causes frequent boost control, affects reliability of a charging process, and preferably, the preset current lower limit value I ' satisfies 85% Is≤I’≤95％Is，IsCharging saturation current for the mobile charging device. For example, when IsAt 50mA, I' may be 45 mA.
Boosted value DeltaV of charging voltage1The step-up value Δ V of each step-up operation of the power management unit 200 may be set in advance1All the same, for example, the voltage may be boosted by 0.1V each time, or the boosted value Δ V may be determined according to the current battery voltage of the mobile device1Since charging is more difficult the later the charging, it is preferable that the step-up value Δ V of the step-up operation of the power management unit 200 is set during one charging process in order to avoid frequent step-up operation1Successively higher, i.e. each time the boost value Δ V1Higher boost value Δ V than the previous time1Or boost the voltage value Δ V every time several boosting operations are performed1Increase some, more be favorable to guaranteeing the stability of later stage charging process like this.
The constant-voltage charging condition includes, for example, after a predetermined time period I after the step-up operationc<I', i.e. the charging current is still continuously decreasing after the boost operationThen, the constant voltage charging stage is entered. As another example, the charging voltage has been boosted to a maximum charging voltage VmaxThen the constant voltage charging phase can be entered. For another example, the existing determination method may be adopted, that is, when the battery voltage of the mobile device has reached a predetermined value, for example, 4.2V, the control enters the constant voltage charging phase. As long as one of the above conditions is satisfied, that is, the control is performed to enter the constant voltage charging stage, only one or two of the above conditions may be selected as the basis for determining whether to enter the constant voltage charging stage.
For example, in a preferred embodiment, when the battery voltage V of the mobile device is lowiSatisfy V'<Vi<V ", the control procedure of the charge control device is as follows:
the control unit 100 controls the mobile charging device to have an initial charging voltage V through the power management unit 2001Charging the mobile device as a current charging voltage;
the current detection unit 300 determines whether the detected charging current falls below I 'or not, and feeds back information to the control unit 100 when the detected charging current is below I';
the control unit 100 sends a boosting instruction to the power management unit 200 according to the feedback information;
the power management unit 200 performs a boosting operation according to an instruction of the control unit 100;
and judging whether the charging current continuously decreases, if so, controlling to enter a constant-voltage charging stage, and otherwise, continuously judging whether the charging current decreases to be lower than I'.
For another example, in another preferred embodiment, when the battery voltage V of the mobile device is lowiSatisfy V'<Vi<V ", the control procedure of the charge control device is as follows:
the control unit 100 controls the mobile charging device to have an initial charging voltage V through the power management unit 2001Charging the mobile device as a current charging voltage;
the current detection unit 300 determines whether the detected charging current falls below I 'or not, and feeds back information to the control unit 100 when the detected charging current is below I';
the control unit 100 sends a boosting instruction to the power management unit 200 according to the feedback information;
the power management unit 200 performs a boosting operation according to an instruction of the control unit 100;
and judging whether the current charging voltage reaches the maximum charging voltage, if so, controlling to enter a constant voltage charging stage, otherwise, judging whether the charging current continuously decreases, if so, controlling to enter the constant voltage charging stage, and otherwise, continuously judging whether the charging current decreases to be lower than I'.
It is understood that, in the above two embodiments, the determination of whether the charging current drops below I' may also be performed by the control unit 100. The determination of whether the present charging voltage reaches the maximum charging voltage may be performed by the control unit 100 or the power management unit 200, and the determination of whether the charging current continuously decreases may be performed by the control unit 100 or the current detection unit 300.
The charging voltage for constant-voltage charging may be a maximum charging voltage VmaxPreferably, when a constant voltage charging condition is satisfied, the control unit 100 controls the mobile charging device to perform constant voltage charging at a current charging voltage, where the charging voltage is an optimal charging voltage that is obtained through step-by-step boosting and feedback control of a charging current and can satisfy a constant voltage charging requirement, and in many cases, the voltage value is smaller than a maximum charging voltage value, so that the charging efficiency in a constant voltage charging stage can be further improved, the number of times of charging the mobile charging device is increased, and unnecessary energy waste is reduced. It can be understood that the charging voltage before the current boosting operation can enter the constant voltage charging stage, and whether the constant voltage charging stage needs to be entered or not can be determined only after the voltage boosting operation needs to be performed once under the limitation of the control logic.
When movingBattery voltage V of mobile equipmentiWhen V 'is less than or equal to V', the battery of the mobile device is prevented from being impacted by large current, and the mobile charging device is controlled to perform trickle charging on the mobile device. That is, when the battery voltage of the mobile device is low, the trickle charge is first performed up to V after the mobile charging device is connected theretoi>When the battery voltage of the mobile device is greater than V', the charging control process can be directly executed after the mobile device is connected to the mobile charging device. Wherein the trickle charge has a charging voltage of VtInitial charging voltage V1>Vt。
One or two or all of the control unit 100, the current detection unit 300 and the power management unit 200 in the charging control device are disposed in one chip, that is, the control unit 100, the current detection unit 300 and the power management unit 200 may be disposed in separate chips, respectively, or two of them may be integrated in one chip and the other may be disposed in a separate chip, for example, the control unit 100 and the current detection unit 300 are integrated in one chip, the power management unit 200 is disposed in one chip, or all of them are integrated in the same chip.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed, implements a charging control method as described above. Note that the computer readable storage medium described in the embodiments of the present disclosure may be, for example, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In embodiments of the disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The invention also provides a control chip which comprises a control unit, wherein the control unit can realize the charging control method.
Further, the control chip further comprises a current detection unit, wherein the current detection unit has a current detection function and is used for detecting the current charging current I of the mobile charging devicec. The current detection unit can directly detect the current charging current IcSending the current to the control unit for the current charging current IcCompared with the preset current lower limit value I', the current detection unit also has a judgment function and is also used for judging IcWhether or not less than I', and when Ic<I' is the feedback of information to the control unit.
Furthermore, the control chip further comprises a power management unit, and the power management unit is used for controlling the charging voltage of the mobile charging device according to the control signal sent by the control unit.
The invention also provides a mobile charging device for charging a mobile device, which comprises the computer readable storage medium as described above, or the control chip as described above, or the charging control device as described above.
The mobile charging device can be a mobile power supply, a mobile charger and the like, and can be used for charging mobile equipment such as a mobile phone and the like.
In a specific embodiment, the mobile charging apparatus is a charging box and the mobile device is a wireless headset, which may be, for example, a TWS wireless headset. Because the TWS wireless earphone comprises the master earphone and the slave earphone, the electric quantity of the master earphone and the electric quantity of the slave earphone are possibly different, the charging box can respectively carry out corresponding charging control on the master earphone and the slave earphone, and the slave earphone can be communicated with the charging box through the master earphone.
The invention also provides a wireless headset set, which comprises a charging box and a wireless headset, wherein the charging box comprises the computer readable storage medium, or the charging box comprises the control chip, or the charging box comprises the charging control device.
It will be appreciated by those skilled in the art that the above-described preferred embodiments may be freely combined, superimposed, without conflict.
It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the invention.
Claims (25)
1. A charging control method is used for controlling a mobile charging device to charge a mobile device, and the maximum charging voltage of the mobile charging device is VmaxThe charging control method is characterized by comprising the following steps: when the battery voltage V of the mobile deviceiSatisfy V'<Vi<V', the following steps are performed:
s210, controlling the mobile charging device to charge at an initial charging voltage V1Charging the mobile device as a current charging voltage, V1<Vmax；
S220, obtaining the current charging current I of the mobile charging devicec；
S230, judgment IcWhether or not to satisfy IcIf the current charging voltage V is larger than or equal to I', maintaining the current charging voltage V of the mobile charging device1Otherwise, executing S240;
s240, increasing the charging voltage of the mobile charging device;
s250, judging whether a constant voltage charging condition is met, if so, executing S260, otherwise, returning to S230;
s260, controlling the mobile charging device to perform constant-voltage charging;
wherein, V ' is the lower limit value of the preset voltage, V ' is the upper limit value of the preset voltage, and I ' is the lower limit value of the preset current.
2. The charge control method according to claim 1, characterized in thatIn step S250, the constant voltage charging condition includes: after a predetermined time after the boosting operation Ic<I’。
3. The charge control method according to claim 1, wherein in said step S250, said constant voltage charging condition includes: the current charging voltage reaches the maximum charging voltage Vmax。
4. The charge control method according to claim 1, wherein in the step S260, the mobile charging device is controlled to perform constant voltage charging at a current charging voltage.
5. The charge control method according to any one of claims 1 to 4, wherein the charge control method is performed when the battery voltage V of the mobile device is ViWhen the charging voltage is less than or equal to V', the mobile charging device is controlled to perform trickle charging on the mobile equipment, and the charging voltage of the trickle charging is VtInitial charging voltage V1>Vt。
6. The charge control method according to any one of claims 1 to 4, characterized in that the step-up value Δ V is performed each time step S240 is executed1Are all equal; alternatively, the first and second electrodes may be,
in a charging process, the step S240 is executed each time1And gradually increases.
7. The charge control method according to any one of claims 1 to 4, wherein the preset current lower limit value I' satisfies 85% Is≤I’≤95％Is，IsCharging saturation current for the mobile charging device.
8. The charge control method according to any one of claims 1 to 4, wherein an initial charging voltage V1＝Vi+ΔV2，ΔV2Is the second preset boost value.
9. A charging control device is used for controlling a mobile charging device to charge mobile equipment, and the maximum charging voltage of the mobile charging device is VmaxThe charging control device is characterized by comprising a control unit, a current detection unit for detecting the charging current of the mobile charging device to the mobile equipment, and a power supply management unit for controlling the charging voltage of the mobile charging device;
the control unit is used for controlling the battery voltage V of the mobile equipmentiSatisfy V'<Vi<V ", the following control is executed:
controlling a mobile charging device to an initial charging voltage V by the power management unit1Charging the mobile device as a current charging voltage, V1<Vmax；
When the current detection unit detects the current charging current I of the mobile charging devicec<When I' is detected, the power management unit is controlled to carry out boosting operation;
when the constant voltage charging condition is met, controlling the mobile charging device to perform constant voltage charging;
wherein, V ' is the lower limit value of the preset voltage, V ' is the upper limit value of the preset voltage, and I ' is the lower limit value of the preset current.
10. The charge control device according to claim 9, wherein the constant-voltage charging condition includes: after a predetermined time after the boosting operation Ic<I’。
11. The charge control device according to claim 9, wherein the constant-voltage charging condition includes: the current charging voltage reaches the maximum charging voltage Vmax。
12. The charge control device according to claim 9, wherein the control unit is configured to control the mobile charging device to perform constant-voltage charging at a current charging voltage when a constant-voltage charging condition is satisfied.
13. The charging control apparatus according to any one of claims 9 to 12, wherein the control unit is further configured to control the charging control apparatus when a battery voltage V of the mobile device is greater than a predetermined valueiWhen the charging voltage is less than or equal to V', the mobile charging device is controlled to perform trickle charging on the mobile equipment, and the charging voltage of the trickle charging is Vt，V1>Vt。
14. The charge control device according to any one of claims 9 to 12, wherein the power supply management unit boosts the voltage value Δ ν per boosting operation1Are all equal; alternatively, the first and second electrodes may be,
a step-up value Δ V of a step-up operation of the power management unit during one charge1The increase is gradual.
15. The charge control device according to any one of claims 9 to 12, wherein the preset current lower limit value I' satisfies 85% Is≤I’≤95％Is，IsCharging saturation current for the mobile charging device.
16. The charge control device according to any one of claims 9 to 12, wherein an initial charging voltage V1＝Vi+ΔV2，ΔV2Is the second preset boost value.
17. The charging control device according to any one of claims 9 to 12, wherein the current detection unit is further configured to determine a present charging current I detected by the current detection unitcWhether the current is less than the preset current lower limit value I' or not, and when the current charging current I is detectedcAnd when the current is smaller than the preset current lower limit value I', a feedback signal is sent to the control unit.
18. The charge control device according to claim 9, wherein one or two or all of the control unit, the current detection unit, and the power management unit in the charge control device are provided in one chip.
19. A control chip characterized by comprising a control unit capable of implementing the charge control method according to any one of claims 1 to 8.
20. The control chip of claim 19, further comprising a current detection unit for detecting a present charging current I of the mobile charging devicec，
The current detection unit is also used for detecting the current charging current IcSending the data to the control unit; alternatively, the first and second electrodes may be,
the current detection unit is also used for judging IcWhether or not less than I', and when Ic<When I' is detected, information is fed back to the control unit.
21. The control chip according to claim 19 or 20, further comprising a power management unit, wherein the power management unit is configured to control a charging voltage of the mobile charging device according to the control signal sent by the control unit.
22. A computer-readable storage medium on which a computer program is stored, the computer program, when executed, implementing the charge control method according to any one of claims 1-8.
23. A mobile charging apparatus for charging a mobile device, wherein the mobile charging apparatus comprises the computer-readable storage medium according to claim 22, or the mobile charging apparatus comprises the control chip according to any one of claims 19 to 21, or the mobile charging apparatus comprises the charging control apparatus according to any one of claims 9 to 18.
24. The mobile charging apparatus of claim 23, wherein the mobile charging apparatus is a charging box and the mobile device is a wireless headset.
25. A wireless headset kit comprising a charging box and a wireless headset, wherein the charging box comprises a computer readable storage medium according to claim 22, or the charging box comprises a control chip according to any one of claims 19-21, or the charging box comprises a charging control device according to any one of claims 9-18.
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