CN108370171B - Mobile terminal, charging method and charging system - Google Patents
Mobile terminal, charging method and charging system Download PDFInfo
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- CN108370171B CN108370171B CN201680000894.1A CN201680000894A CN108370171B CN 108370171 B CN108370171 B CN 108370171B CN 201680000894 A CN201680000894 A CN 201680000894A CN 108370171 B CN108370171 B CN 108370171B
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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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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Abstract
The utility model provides a mobile terminal, a charging method and a charging system, which relate to the technical field of charging, wherein the mobile terminal comprises: the battery management system comprises a hardware charging interface, a battery management chip electrically connected with the hardware charging interface and a battery electrically connected with the battery management chip; the hardware charging interface is used for receiving direct-current voltage transmitted by the power adapter through a charging wire; inputting a direct current voltage to the battery management chip; the battery management chip is used for calculating the impedance of the charging wire according to the actual voltage value and the actual current value of the collected direct-current voltage; the battery management chip is also used for setting charging current according to the impedance of the charging wire; and charging the battery according to the set charging current. The embodiment of the disclosure avoids the potential safety hazard caused by large heat productivity of the inferior charging wire when the inferior charging wire with large impedance is used for charging, thereby improving the safety of the charging process of the mobile terminal.
Description
Technical Field
The present disclosure relates to the field of charging technologies, and in particular, to a mobile terminal, a charging method, and a charging system.
Background
A charger is a charging device composed of a power adapter and a charging cord, and the power adapter and the charging cord are usually in a separable structure in order to improve portability of the charger.
When the user makes up power adapter and charging wire, only need with the link of charging wire insert power adapter's adapter interface can. According to the formula P ═ I for calculating the heating power2Xr indicates that the higher the impedance of the charging line, the higher the heating value of the charging line, and therefore, the current is constantCharging with the poor charging wire with large impedance has great potential safety hazard.
Disclosure of Invention
The disclosure provides a mobile terminal, a charging method and a charging system. The technical scheme is as follows:
in a first aspect, a mobile terminal is provided, which includes: the battery management system comprises a hardware charging interface, a battery management chip electrically connected with the hardware charging interface and a battery electrically connected with the battery management chip;
the hardware charging interface is used for receiving direct-current voltage transmitted by the power adapter through a charging wire; inputting a direct current voltage to the battery management chip;
the battery management chip is used for calculating the impedance of the charging wire according to the actual voltage value and the actual current value of the collected direct-current voltage;
the battery management chip is also used for setting charging current according to the impedance of the charging wire; and charging the battery according to the set charging current.
Optionally, the battery management chip is electrically connected to the hardware charging interface through VBus (Voltage Bus pin) and GND (GROUND pin);
the battery management chip is used for receiving the direct-current voltage input by the hardware charging interface through the VBus;
the battery management chip is also used for acquiring at least two groups of test data at the VBus, and each group of test data comprises an actual voltage value and an actual current value at the VBus; and calculating the impedance of the charging wire according to the at least two groups of test data.
Optionally, the battery management chip is further electrically connected with the hardware charging interface through D + (Data +, Data plus pin) and D- (Data-, Data minus pin);
the battery management chip is also used for sending a test instruction to the power adapter through D + or D-when the connection with the power adapter is detected, wherein the test instruction is used for indicating the power adapter to output direct-current voltage with a constant voltage value;
the battery management chip is also used for charging the battery by using the first charging current; collecting a first test number at VBusAccordingly, the first test data includes a first actual voltage value V at VBus1And a first actual current value I1；
The battery management chip is also used for charging the battery by using second charging current; collecting second test data at VBus, the second test data comprising a second actual voltage value V at VBus2And a second actual current value I2；
The battery management chip is also used for calculating the impedance of the charging wire according to the first test data and the second test data;
wherein the impedance of the charging line is (V)1-V2)/(I2-I1) And the first charging current is not equal to the second charging current and is less than or equal to the rated charging current, and the rated charging current refers to the maximum charging current for charging the battery.
Optionally, the battery management chip is configured to determine a charging current down-regulation coefficient according to the impedance of the charging line; and setting the charging current according to the charging current down-regulation coefficient and the rated charging current, wherein the rated charging current refers to the maximum charging current for charging the battery.
Optionally, the battery management chip is electrically connected to the processor;
the battery management chip is used for sending the set charging current to the processor;
and the processor is used for controlling the display screen to display prompt information when the set charging current is smaller than a preset current threshold, wherein the prompt information is used for prompting a user to replace a charging wire.
Optionally, the mobile terminal further includes a temperature sensor, the temperature sensor is electrically connected to the processor, and the battery control chip is electrically connected to the processor;
the processor is used for acquiring the ambient temperature acquired by the temperature sensor; when the ambient temperature is greater than a preset temperature threshold, sending a control instruction to a battery management chip, wherein the control instruction is used for indicating the set charging current to be adjusted downwards;
and the battery management chip is also used for adjusting the set charging current downwards according to the control instruction.
In a second aspect, there is provided a charging method for a mobile terminal according to the first aspect, the method including:
receiving direct current voltage input by a hardware charging interface, wherein the direct current voltage is transmitted to the hardware charging interface by a power adapter through a charging wire;
calculating the impedance of the charging wire according to the actual voltage value and the actual current value of the collected direct current voltage;
setting a charging current according to the impedance of a charging wire;
and charging the battery according to the set charging current.
Optionally, calculating the impedance of the charging line according to the actual voltage value and the actual current value of the collected dc voltage includes:
collecting at least two groups of test data at the VBus, wherein each group of test data comprises an actual voltage value and an actual current value at the VBus;
and calculating the impedance of the charging wire according to the at least two groups of test data.
Optionally, at least two sets of test data at the VBus are collected, including:
when the connection with the power adapter is detected, sending a test instruction to the power adapter through D + or D-;
charging the battery with a first charging current, and collecting first test data at VBus, wherein the first test data comprises a first actual voltage value V at VBus1And a first actual current value I1
Charging the battery with a second charging current, and collecting second test data at VBus, the second test data including a second actual voltage value V at VBus2And a second actual current value I2；
Calculating an impedance of the charging line from at least two sets of test data, comprising:
calculating the impedance of the charging wire according to the first test data and the second test data;
wherein the impedance of the charging line is (V)1-V2)/(I2-I1) And the first charging current is not equal to the second charging current and is less than or equal to the rated charging current, and the rated charging current refers to the maximum charging current for charging the battery.
Optionally, setting the charging current according to the impedance of the charging line includes:
determining a charging current down-regulation coefficient according to the impedance of a charging line;
and setting the charging current according to the charging current down-regulation coefficient and the rated charging current, wherein the rated charging current refers to the maximum charging current for charging the battery.
Optionally, the method further includes:
and sending the set charging current to a processor, wherein the processor is used for controlling a display screen to display prompt information when the set charging current is smaller than a preset current threshold, and the prompt information is used for prompting a user to replace a charging wire.
Optionally, the method further includes:
receiving a control instruction sent by a processor, wherein the control instruction is sent when the processor detects that the ambient temperature is greater than a preset temperature threshold value and is used for indicating to adjust the set charging current downwards;
and adjusting the set charging current downwards according to the control instruction.
In a third aspect, a charging system is provided, which includes a power adapter and a mobile terminal;
the power adapter is connected with the mobile terminal through a charging wire;
the mobile terminal comprises a mobile terminal as described in the first aspect.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
before a battery management chip in the mobile terminal charges the battery, the actual voltage value and the actual current value of the input direct-current voltage are collected, the impedance of the charging wire is further calculated according to the actual voltage value and the actual current value, the charging current for charging the battery is reset according to the impedance, the heat productivity of the charging wire in the charging process is reduced, the potential safety hazard caused by the large heat productivity of the inferior charging wire when the inferior charging wire with large impedance is used for charging is avoided, and the safety of the charging process of the mobile terminal is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a block diagram illustrating a charging system according to an exemplary embodiment;
fig. 2 is a block diagram showing a structure of a charging system according to another exemplary embodiment;
fig. 3 is a block diagram showing a structure of a charging system according to still another exemplary embodiment;
fig. 4 is a block diagram showing a structure of a charging system according to still another exemplary embodiment;
FIG. 5 illustrates a flow chart of a charging method provided by an exemplary embodiment;
FIG. 6 illustrates a flow chart of a charging method provided by another exemplary embodiment;
FIG. 7A illustrates a flow chart of a charging method provided by yet another exemplary embodiment;
FIG. 7B is a schematic diagram of an implementation of the charging method shown in FIG. 7A;
FIG. 8 illustrates a flow chart of a charging method provided by yet another exemplary embodiment;
fig. 9 is a block diagram illustrating a structure of a mobile terminal according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following illustrative examples do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Reference herein to "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The symbol "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Fig. 1 shows a block diagram of a charging system according to an exemplary embodiment. The charging system comprises a power adapter 110, a charging wire 120 and a mobile terminal 130, wherein the power adapter 110 is connected with the mobile terminal 130 through the charging wire 120.
The power adapter 110 and the charging wire 120 constitute a charger for charging the mobile terminal 130, and when the power adapter 110 is externally connected to a power source, the power adapter 110 converts an input ac voltage (for example, 220V ac voltage) into a dc voltage (for example, 5V dc voltage) through an internal voltage conversion chip (not shown), and transmits the dc voltage to the mobile terminal 130 through the charging wire 120.
Alternatively, the power adapter 110 and the charging cord 120 may be integrated or separable.
As shown in fig. 1, the mobile terminal 130 includes a hardware charging interface 131, a battery management chip 132 electrically connected to the hardware charging interface 131, and a battery 133 electrically connected to the battery management chip 132.
The mobile terminal 130 is connected to the charging line 120 through the hardware charging interface 131, so as to receive the dc voltage transmitted by the power adapter 110 through the charging line 120, and input the dc voltage to the connected battery management chip 132.
Optionally, the hardware charging interface 131 may be a USB (Universal Serial Bus) 2.0 interface, a USB3.0 interface, a Type C interface, or a Lightning interface; correspondingly, the charging line 120 may be a USB2.0 data line, a USB3.0 data line, a Type C data line, or a Lightning data line, and the present disclosure does not limit the types of the hardware charging interface 131 and the charging line 120.
The battery management chip 132 in the mobile terminal 130 has a voltage and current detection function, and when receiving an input dc voltage, the battery management chip 132 can acquire an actual voltage value and an actual current value of the dc voltage.
Since the charging line 120 has a certain impedance, when the dc voltage flows through the charging line 120, the charging line 120 shares a part of the voltage, and accordingly, the actual voltage value measured by the battery management chip 132 is smaller than the voltage value of the output voltage of the power adapter 110. According to the impedance calculation formula R ═ U/I, the battery management chip 132 can calculate the impedance of the charging line 120 according to the collected actual voltage value and actual current value.
The battery management chip 132 further has a charging current adjusting function, and by this function, the battery management chip 132 adjusts (e.g., down-adjusts) the charging current according to the calculated impedance of the charging line 120, so as to charge the connected battery 133 according to the adjusted charging current through an internal battery charging circuit (not shown in the figure).
Optionally, when the impedance of the charging line 120 is relatively large, the battery management chip 132 down-regulates the charging current, and the down-regulation proportion of the charging current is in a direct proportional relationship with the impedance of the charging line 120, that is, the larger the impedance is, the larger the down-regulation proportion of the charging current is; the smaller the impedance, the smaller the down-regulation ratio of the charging current.
When a device having a charging function (e.g., a mobile power supply, a desktop computer, etc.) is used to charge the mobile terminal, the mobile terminal 130 in fig. 1 may adjust the charging current according to the calculated impedance of the charging line, which is not limited in this disclosure.
Through above-mentioned charging current regulation mechanism, when using the charging wire of inferiority to charge, because the impedance of the charging wire of inferiority is great, charging current is down-regulated to the battery management chip to reduce calorific capacity of charging wire, avoid the too big potential safety hazard that arouses of calorific capacity of charging wire.
In summary, in this embodiment, before the battery management chip inside the mobile terminal charges the battery, the actual voltage value and the actual current value of the input dc voltage are collected, and the impedance of the charging line is further calculated according to the actual voltage value and the actual current value, so that the charging current for charging the battery is reset according to the impedance, the heat generation amount of the charging line in the charging process is reduced, the potential safety hazard caused by the large heat generation amount of the inferior charging line when the inferior charging line with the large impedance is used for charging is avoided, and the safety of the mobile terminal in the charging process is improved.
On the basis of the charging system shown in fig. 1, as shown in fig. 2, the battery management chip 132 includes VBus and GND, and the battery management chip 132 is electrically connected to the hardware charging interface 131 through VBus and GND.
After the hardware charging interface 131 receives the dc voltage transmitted by the charging line 120, the dc voltage is input to the battery management chip 132 through VBus, and accordingly, the battery management chip 132 receives the dc voltage through VBus. The dc voltage flowing through the battery management chip 132 flows out from GND (low potential) and flows to the power adapter 110 through the charging wire 120, forming a complete charging loop.
In the process of calculating the impedance of the charging line 120, the battery management chip 132 collects at least two sets of test data at the VBus position, and calculates the impedance of the charging line according to the at least two sets of test data, where each set of test data includes an actual voltage value and an actual current value at the VBus position that are collected at the same time.
Optionally, when two sets of test data are collected, the battery management chip 132 calculates the impedance of the charging line 120 according to the two sets of test data;
optionally, when n groups of test data are collected, where n is greater than or equal to 3, the battery management chip 132 calculates an impedance reference value according to each two groups of test data, and determines an average value of n (n-1)/2 impedance reference values as the impedance of the charging line 120.
The specific process of calculating the impedance of the charging line 120 by the battery management chip 132 is schematically described below.
As shown in fig. 2, the battery management chip 132 further includes D + and D-, and the battery management chip 132 is electrically connected to the hardware charging interface 131 through D + and D-, which are used for data or signal transmission.
In order to ensure that the dc voltage output by the power adapter 110 remains unchanged during the calculation of the impedance, the battery management chip 120 sends a test instruction to the power adapter 110 through D + or D-when detecting that the connection with the power adapter is established, the test instruction being used to instruct the power adapter 110 to output a dc voltage of a constant voltage value.
Optionally, the test instruction further includes an output voltage value, which is used to instruct the power adapter 110 to output the dc voltage with the output voltage value, where the output voltage value is less than or equal to the maximum charging voltage of the mobile terminal.
Accordingly, after receiving the test command, the power adapter 110 converts the ac voltage into a dc voltage with a constant voltage value through an internal voltage conversion chip, and transmits the dc voltage to the mobile terminal 130 through the charging line 120.
Alternatively, while outputting the constant dc voltage, the power adapter 110 sends a feedback instruction to the mobile terminal 130 through an internal adapter management chip (not shown in the figure), where the feedback instruction is used to indicate that the dc voltage is being output at the constant voltage value.
The battery management chip 132 has a charging current adjusting function, for example, the battery management chip 132 may adjust the charging current through a Metal-Oxide-Semiconductor Field-Effect transistor (MOSFET). When receiving the feedback command sent by the power adapter 110, the battery management chip 132 controls the battery 133 to be charged with the first charging current, and during the charging process, the battery management chip 132 collects the first actual voltage value V including VBus1And a first actual current value I1The first test data of (1).
After the first test data is collected, the battery management chip 132 adjusts the charging current, controls the battery 133 to be charged by the second charging current, and collects the second actual voltage value V including VBus in the charging process2And a second actual current value I2The second test data of (1).
It should be noted that the first charging current and the second charging current are different, and both the first charging current and the second charging current are smaller than a rated charging current of the battery 133, which refers to a maximum charging current for charging the battery, for example, when the rated charging current is 1.5A, the first charging current is 0.5A, and the second charging current is 0.8A.
Since the power adapter 110 outputs a constant dc voltage, the sum of the voltage shared by the charging line 110 and the actual voltage flowing into the battery management chip 132 remains unchanged during two consecutive measurements, i.e. R × I1+V1＝R×I2+V2Where R is the impedance of the charging line 120. From the above equation, R ═ (V) can be obtained1-V2)/(I2-I1)。
Obviously, the battery management chip 132 can still calculate the impedance of the charging line 120 according to the collected first test data and the second test data under the condition that the accurate voltage value output by the power adapter 110 cannot be known, and because V in the above formula1、V2、I1And I2All the impedance values are actually measured values, so the calculated impedance has higher accuracy.
After the impedance of the charging line 120 is calculated, the battery management chip 132 further determines a charging current down-regulation coefficient according to the impedance, and resets the charging current according to the charging current down-regulation coefficient and the rated charging current, so as to charge the battery 133 according to the set charging current. The battery management chip 132 stores a corresponding relationship between the impedance and the charging current down-regulation coefficient in advance, and schematically, the corresponding relationship is shown in table one.
Watch 1
| Charging line impedance R | Down regulation coefficient of charging current |
| R＜0.3Ω | 1 |
| 0.3Ω≤R＜0.5Ω | 0.7 |
| 0.5Ω≤R＜1.0Ω | 0.5 |
| 1.0Ω≤R＜3.0Ω | 0.3 |
| R≥3.0Ω | 0 |
For example, when the impedance of the charging line is calculated to be 0.2 Ω, the battery management chip 132 charges the battery 133 with the rated charging current; for another example, if the battery management chip 132 calculates that the impedance of the charging line is 0.45 Ω and the rated charging current is 1.5A, the charging current is set to 1.5 × 0.45 — 0.675A; for another example, when the impedance of the charging line is calculated to be 3.5 Ω, the battery management chip 132 stops charging the battery 133.
In this embodiment, the battery management chip indicates the power adapter to output a constant dc voltage through D + or D-and collects at least two sets of test data at VBus by adjusting the charging current, so as to calculate the impedance of the charging line according to the actual voltage value and the actual current value contained in the test data, thereby ensuring that the data used when calculating the impedance of the charging line are both actual measurement values, and improving the accuracy of the calculated impedance of the charging line.
Compared with the charging of the battery according to the rated charging current, the charging of the battery according to the charging current after the down regulation takes longer time to fully charge the battery, and the charging wire consumes a large amount of electric quantity in the charging process. Therefore, in order to remind the user to replace the poor charging line in time and shorten the charging time, optionally, on the basis of the charging system shown in fig. 2, the battery management chip 132 in the mobile terminal 130 is further electrically connected to the processor 134.
After the battery management chip 132 completes the charging current setting, the set charging current is sent to the processor 134, and accordingly, the processor 134 receives the set charging current.
After receiving the set charging current, the processor 134 detects whether the charging current is smaller than a preset current threshold, and when the charging current is smaller than the preset current threshold, the processor 134 controls an electrically connected display screen (not shown in the figure) to display a prompt message, so as to prompt a user to replace a charging wire.
Optionally, the battery management chip 132 may further send a charging current down-regulation coefficient to the processor, and the processor 134 determines a corresponding prompting mode according to the charging current down-regulation coefficient and then prompts the corresponding prompting mode. For example, if the charging current down-regulation coefficient received by the processor is 0.7, the display screen is controlled to display text prompt information; for another example, if the charging current down-regulation coefficient received by the processor is 0.3, the display screen is controlled to display animation prompt information.
In this embodiment, the battery management chip sends the charging current after setting for the treater can show corresponding prompt message according to this charging current, and the suggestion user changes the charging wire as early as possible, the electric quantity loss that causes when avoiding using the charging wire of poor quality to charge.
In order to avoid the above situation, optionally, on the basis of the charging system shown in fig. 3, as shown in fig. 4, the mobile terminal 130 further includes a temperature sensor 135, and the temperature sensor 135 is electrically connected to the processor 134.
In calculating the impedance of the charging line 120, the temperature sensor 135 captures the ambient temperature of the external environment, and the processor 134 accordingly obtains the ambient temperature from the temperature sensor 135.
After obtaining the ambient temperature, the processor 134 detects whether the ambient temperature is greater than a preset temperature threshold, and when the ambient temperature is greater than the preset temperature threshold, the processor 134 sends a control instruction to the battery management chip 132 to instruct the battery management chip to adjust the set charging current downward.
For example, when the acquired ambient temperature is higher than 28 ℃, the processor 134 sends the control instruction to the battery management chip 132.
Accordingly, the battery management chip 132 performs down-regulation based on the set charging current according to the received control instruction.
Optionally, after receiving the control instruction, the battery management chip 132 down-regulates the determined charging current down-regulation coefficient by one level, and resets the charging current according to the adjusted charging current down-regulation coefficient.
For example, the battery management chip 132 determines that the charging current down-regulation coefficient is 0.7 according to the impedance of the charging line 120, and when receiving the control instruction sent by the processor 134, the battery management chip 132 regulates the charging current down-regulation coefficient to be 0.5.
In this embodiment, when ambient temperature was higher, the treater sent control command to battery management chip, instructed battery management chip to reduce charging current to reduce the heat that produces on the charging wire, slow down the rising speed of charging wire temperature.
Fig. 5 shows a flowchart of a charging method provided by an exemplary embodiment. The embodiment of the present disclosure is illustrated by applying the charging method to the mobile terminal 130 shown in fig. 1 to 4. The charging method comprises the following steps:
in step 501, a direct current voltage input by a hardware charging interface is received, and the direct current voltage is transmitted to the hardware charging interface through a charging line by a power adapter.
In step 502, the impedance of the charging line is calculated according to the actual voltage value and the actual current value of the collected direct current voltage.
The battery management chip in the mobile terminal has a voltage and current measuring function, and in the process of calculating the impedance of the charging line, the mobile terminal acquires an actual voltage value and an actual current value through the battery management chip and calculates the impedance of the charging line according to the actual voltage value and the actual current value.
Optionally, the battery management chip acquires at least two sets of test data at the VBus position, and calculates the impedance of the charging line according to the at least two sets of test data, where each set of test data includes an actual voltage value and an actual current value at the VBus position.
In step 503, the charging current is set according to the impedance of the charging line.
The battery management chip in the mobile terminal has a current regulation function, and after the impedance of the charging wire is obtained through calculation, the battery management chip correspondingly regulates the charging current.
In step 504, the battery is charged according to the set charging current.
Optionally, a battery management chip in the mobile terminal includes a battery charging circuit, and the battery management chip charges the battery through the battery charging current according to the set charging current.
In summary, in this embodiment, before the battery management chip inside the mobile terminal charges the battery, the actual voltage value and the actual current value of the input dc voltage are collected, and the impedance of the charging line is further calculated according to the actual voltage value and the actual current value, so that the charging current for charging the battery is reset according to the impedance, the heat generation amount of the charging line in the charging process is reduced, the potential safety hazard caused by the large heat generation amount of the inferior charging line when the inferior charging line with the large impedance is used for charging is avoided, and the safety of the mobile terminal in the charging process is improved.
Fig. 6 shows a flowchart of a charging method provided by another exemplary embodiment. The embodiment of the present disclosure is illustrated by applying the charging method to the mobile terminal 130 shown in fig. 1 to 4. The charging method comprises the following steps:
in step 601, upon detecting that a connection is established with a power adapter, a test instruction is sent to the power adapter via either D + or D-.
In order to ensure that the direct-current voltage output by the power adapter remains unchanged in the process of calculating the impedance, when the battery management chip detects that the connection with the power adapter is established, the battery management chip sends a test instruction to the power adapter through D + or D-, and the test instruction is used for instructing the power adapter to output the direct-current voltage with a constant voltage value.
Optionally, the test instruction further includes an output voltage value, which is used to instruct the power adapter to output the dc voltage with the output voltage value, where the output voltage value is less than or equal to the maximum charging voltage of the mobile terminal.
In step 602, a dc voltage input by the hardware charging interface is received, where the dc voltage is a constant dc voltage output by the power adapter according to the test instruction.
After the power adapter receives the test instruction, the alternating voltage is converted into the direct voltage with a constant voltage value through the internal voltage conversion chip, and the direct voltage is transmitted to the mobile terminal through the charging wire.
Optionally, while outputting the constant dc voltage, the power adapter sends a feedback instruction to the mobile terminal through an internal adapter management chip, where the feedback instruction is used to instruct that the dc voltage is being output at a constant voltage value.
Correspondingly, after receiving the feedback instruction, the battery management chip in the mobile terminal receives the direct-current voltage input by the hardware charging interface.
In step 603, the battery is charged with a first charging current, and first test data at VBus is collected, the first test data including a first actual voltage value V at VBus1And a first actual current value I1。
After receiving the input constant direct current voltage, the battery management chip charges the battery by using a first charging current and acquires a first actual voltage value V at the VBus of the battery management chip in the charging process1And a first actual current value I1. The first charging current is smaller than a rated charging current, and the rated charging current refers to a maximum charging current for charging the battery.
In step 604, the battery is charged with a second charging current, and second test data at VBus is collected, the second test data including a second actual voltage value V at VBus2And a second actual current value I2。
After the first test data acquisition is finished, the battery management chip charges the battery by using a second charging current and acquires a second actual voltage value V at the VBus position in the charging process2And a second actual current value I2. Wherein the second charging current is not equal to the first charging currentAnd the second charging current is less than the rated charging current.
In step 605, the impedance of the charging line is calculated from the first test data and the second test data.
Because the power adapter outputs constant direct current voltage, the sum of the voltage shared by the charging wire and the actual voltage flowing into the battery management chip is kept unchanged in two successive measurement processes, namely R multiplied by I1+V1＝R×I2+V2Where R is the impedance of the charging line 120.
R ═ V can be obtained from the above equation1-V2)/(I2-I1) Therefore, after the two sets of test data are obtained through measurement, the battery management chip can calculate the impedance of the charging wire according to the two sets of test data. Due to V in the above formula1、V2、I1And I2All the impedance values are actually measured values, so that the impedance calculated by the method has high accuracy.
In step 606, a charging current turn down factor is determined based on the impedance of the charging line.
The mobile terminal stores a corresponding relationship between the charging line impedance and the charging current down-regulation coefficient in advance, and the corresponding relationship is schematically shown in the table one.
After the charging line impedance is obtained through calculation, the battery management chip determines a charging current down-regulation coefficient according to the corresponding relation.
In step 607, a charging current is set according to the charging current down-regulation factor and a rated charging current, which is a maximum charging current for charging the battery.
After the charging current down-regulation coefficient is determined, the battery management chip further sets the charging current according to the rated charging current of the mobile terminal.
For example, when the battery management chip calculates that the impedance of the charging line is 0.45 Ω and the rated charging current is 1.5A, the charging current is set to 1.5 × 0.45 — 0.675A.
In step 608, the battery is charged according to the set charging current.
And after the charging current is set, the battery management chip charges the battery according to the set charging current.
It should be noted that, compared with charging the battery according to the rated charging current, it takes a longer time to fully charge the battery according to the down-regulated charging current, and the charging line consumes a large amount of electricity during the charging process.
In this embodiment, the battery management chip indicates the power adapter to output a constant dc voltage through D + or D-and collects at least two sets of test data at VBus by adjusting the charging current, so as to calculate the impedance of the charging line according to the actual voltage value and the actual current value contained in the test data, thereby ensuring that the data used when calculating the impedance of the charging line are both actual measurement values, and improving the accuracy of the calculated impedance of the charging line.
In order to make the user know that the currently used charging line is a poor charging line, so as to timely replace the poor charging line, based on the charging method shown in fig. 6, as shown in fig. 7A, the following steps may be further included after step 607.
In step 609, the set charging current is sent to the processor, and the processor is configured to control the display screen to display a prompt message when the set charging current is smaller than a preset current threshold, where the prompt message is used to prompt a user to replace a charging wire.
And after the battery management chip sets the charging current according to the charging current down-regulation coefficient, the set charging current is sent to the processor. And after receiving the charging current, the processor detects whether the charging current is smaller than a preset current threshold value, and when the charging current is smaller than the preset current threshold value, the processor controls the display screen to display corresponding prompt information and indicates a user to replace the charging wire.
For example, as shown in fig. 7B, when the power adapter 71 is used to charge the mobile terminal 72, the battery management chip in the mobile terminal 72 sends the set charging current to the processor; the processor detects that the set charging current is less than the preset current threshold and instructs the display screen 73 to display corresponding prompt information.
Optionally, the battery management chip may further send the charging current down-regulation coefficient to the processor, and the processor may perform the prompt after determining the corresponding prompt mode according to the charging current down-regulation coefficient. For example, if the charging current down-regulation coefficient received by the processor is 0.7, the display screen is controlled to display text prompt information; for another example, if the charging current down-regulation coefficient received by the processor is 0.3, the display screen is controlled to display animation prompt information.
In this embodiment, the battery management chip sends the charging current after setting for the treater can show corresponding prompt message according to this charging current, and the suggestion user changes the charging wire as early as possible, the electric quantity loss that causes when avoiding using the charging wire of poor quality to charge.
When the mobile terminal is the mobile terminal 130 in the charging system shown in fig. 4, on the basis of the charging method shown in fig. 6, as shown in fig. 8, after the step 607, the following steps are further included:
in step 610, a control command sent by the processor is received, where the control command is sent when the processor detects that the ambient temperature is greater than a preset temperature threshold.
In the process of calculating the impedance of the charging wire, a temperature sensor in the mobile terminal acquires the ambient temperature of the external environment, and the processor acquires the ambient temperature from the temperature sensor.
And when the ambient temperature is greater than the preset temperature threshold, the processor sends a control instruction to the battery management chip to instruct the battery management chip to adjust the set charging current downwards.
For example, when the acquired ambient temperature is higher than 28 ℃, the processor sends the control instruction to the battery management chip.
In step 611, the set charging current is adjusted downward according to the control command.
Optionally, after receiving the control instruction, the battery management chip down-regulates the determined charging current down-regulation coefficient by one level, and resets the charging current according to the adjusted charging current down-regulation coefficient.
For example, the battery management chip determines that the charging current down-regulation coefficient is 0.7 according to the impedance of the charging line, and when receiving the control instruction sent by the processor 134, the battery management chip regulates the charging current down-regulation coefficient to be 0.5.
In this embodiment, when ambient temperature was higher, the treater sent control command to battery management chip, instructed battery management chip to reduce charging current to reduce the heat that produces on the charging wire, slow down the rising speed of charging wire temperature.
Fig. 9 is a block diagram illustrating a structure of a mobile terminal according to an exemplary embodiment. For example, the mobile terminal 900 may be a mobile telephone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, or the like.
Referring to fig. 9, mobile terminal 900 may include one or more of the following components: processing component 902, memory 904, power component 906, multimedia component 908, audio component 910, input/output (I/O) interface 912, sensor component 914, and communication component 916.
The power components 906 provide power to the various components of the mobile terminal 900. The power components 906 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the mobile terminal 900. In the disclosed embodiment, the power supply component 906 includes a battery management chip, and the charging method of the disclosed embodiment is performed by the battery management chip.
The multimedia component 908 comprises a screen that provides an output interface between the mobile terminal 900 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 908 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the mobile terminal 900 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 910 is configured to output and/or input audio signals. For example, audio component 910 includes a Microphone (MIC) configured to receive external audio signals when mobile terminal 900 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 904 or transmitted via the communication component 916. In some embodiments, audio component 910 also includes a speaker for outputting audio signals.
I/O interface 912 provides an interface between processing component 902 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 914 includes one or more sensors for providing various aspects of state assessment for the mobile terminal 900. For example, sensor assembly 914 may detect an open/closed state of mobile terminal 900, a relative positioning of components, such as a display and keypad of mobile terminal 900, a change in position of mobile terminal 900 or a component of mobile terminal 900, a presence or absence of user contact with mobile terminal 900, an orientation or acceleration/deceleration of mobile terminal 900, and a change in temperature of mobile terminal 900. The sensor assembly 914 may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly 914 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 914 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 916 is configured to facilitate communications between the mobile terminal 900 and other devices in a wired or wireless manner. The mobile terminal 900 may access a wireless network based on a communication standard, such as Wi-Fi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 916 receives a broadcast signal or broadcast associated information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 916 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the mobile terminal 900 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the charging method performed by the processors in the above-described embodiments.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 904 comprising instructions, executable by the processor 918 of the mobile terminal 900 to perform the charging method performed by the processor in the above embodiments is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (9)
1. A mobile terminal, characterized in that the mobile terminal comprises: the battery management chip is electrically connected with the hardware charging interface through a voltage bus pin VBus and a grounding pin GND, the temperature sensor is electrically connected with the processor, and the battery management chip is electrically connected with the processor;
the hardware charging interface is used for receiving direct-current voltage transmitted by the power adapter through a charging wire; inputting the direct-current voltage to the battery management chip;
the battery management chip is used for receiving the direct-current voltage input by the hardware charging interface through the VBus; calculating to obtain an impedance reference value according to each two groups of test data in n groups of collected test data, determining the average value of n (n-1)/2 impedance reference values as the impedance of the charging wire, wherein each group of test data comprises the actual voltage value and the actual current value of the direct current voltage, and n is more than or equal to 3; the battery management chip is further used for determining a charging current down-regulation coefficient according to the impedance of the charging line, the charging current down-regulation coefficient is in a direct proportional relation with the impedance, and the corresponding relation between the charging current down-regulation coefficient and the impedance is stored in the battery management chip in advance; setting a charging current according to the charging current down-regulation coefficient and a rated charging current, wherein the rated charging current refers to the maximum charging current for charging the battery;
the processor is used for acquiring the ambient temperature acquired by the temperature sensor; when the ambient temperature is greater than a preset temperature threshold, sending a control instruction to the battery management chip, wherein the control instruction is used for indicating the charging current after setting to be adjusted downwards;
and the battery management chip is also used for reducing the determined charging current down-regulation coefficient by one grade after receiving the control instruction, and resetting the charging current according to the adjusted charging current down-regulation coefficient.
2. The mobile terminal of claim 1, wherein the battery management chip is further configured to collect at least two sets of test data at the VBus, and each set of test data includes the actual voltage value and the actual current value at the VBus; and calculating the impedance of the charging wire according to the at least two groups of test data.
3. The mobile terminal of claim 2, wherein the battery management chip is further electrically connected to the hardware charging interface via a data plus pin D + and a data minus pin D-;
the battery management chip is further configured to send a test instruction to the power adapter through the D + or the D-when connection with the power adapter is detected, where the test instruction is used to instruct the power adapter to output a dc voltage with a constant voltage value;
the battery management chip is also used for charging the battery by first charging current; collecting first test data at the VBus, the first test data comprising a first actual voltage value V at the VBus1And a first actual current value I1；
The battery management chip is also used for charging the battery by using a second charging current; collecting second test data at the VBus, the second test data comprising a second actual voltage value V at the VBus2And a second actual current value I2；
The battery management chip is further used for calculating the impedance of the charging line according to the first test data and the second test data;
wherein the impedance of the charging wire = (V)1-V2）/（I2-I1) And the first charging current is not equal to the second charging current and is not more than the rated charging current, and the rated charging current refers to the maximum charging current for charging the battery.
4. The mobile terminal of any of claims 1 to 3, wherein the battery management chip is electrically connected to the processor;
the battery management chip is used for sending the set charging current to the processor;
the processor is used for controlling the display screen to display prompt information when the set charging current is smaller than a preset current threshold value, and the prompt information is used for prompting a user to replace the charging wire.
5. A charging method for a mobile terminal according to any one of claims 1 to 4, the method comprising:
receiving the direct-current voltage input by the hardware charging interface through the VBus, wherein the direct-current voltage is transmitted to the hardware charging interface through the charging line by the power adapter, and the battery management chip is electrically connected with the hardware charging interface through the VBus and a grounding pin GND;
calculating to obtain an impedance reference value according to each two groups of test data in n groups of collected test data, determining the average value of n (n-1)/2 impedance reference values as the impedance of the charging wire, wherein each group of test data comprises the actual voltage value and the actual current value of the direct current voltage, and n is more than or equal to 3;
determining a charging current down-regulation coefficient according to the impedance of the charging line, wherein the charging current down-regulation coefficient is in a direct proportional relation with the impedance;
setting the charging current according to the charging current down-regulation coefficient and a rated charging current, wherein the rated charging current refers to the maximum charging current for charging the battery;
receiving a control instruction sent by a processor, wherein the control instruction is sent when the processor detects that the ambient temperature is greater than a preset temperature threshold value and is used for indicating to adjust the set charging current downwards;
responding to the control instruction received by the battery management chip, reducing the determined charging current down-regulation coefficient by one grade, and resetting the charging current according to the adjusted charging current down-regulation coefficient;
and charging the battery according to the set charging current.
6. The method according to claim 5, for the mobile terminal according to claim 2 or 3, wherein the calculating the impedance of the charging line according to the collected actual voltage value and the actual current value of the DC voltage comprises:
acquiring at least two groups of test data at the VBus, wherein each group of test data comprises the actual voltage value and the actual current value at the VBus;
and calculating the impedance of the charging wire according to the at least two groups of test data.
7. The method of claim 6, for the mobile terminal of claim 3, wherein the collecting at least two sets of test data at the VBus comprises:
when connection establishment with the power adapter is detected, sending the test instruction to the power adapter through the D + or the D-;
charging the battery with the first charging current, and collecting the first test data at the VBus, the first test data including the first actual voltage value V at the VBus1And the first actual current value I1；
Charging the battery with the second charging current, and collecting the second test data at the VBus, wherein the second test data comprises the second actual voltage value V at the VBus2And the second actual current value I2；
The calculating the impedance of the charging wire according to the at least two sets of test data comprises:
calculating the impedance of the charging wire according to the first test data and the second test data;
wherein the impedance of the charging wire = (V)1-V2）/（I2-I1) And the first charging current is not equal to the second charging current and is not more than the rated charging current, and the rated charging current refers to the maximum charging current for charging the battery.
8. The method of claim 5, further comprising:
and sending the set charging current to the processor, wherein the processor is used for controlling a display screen to display prompt information when the set charging current is smaller than a preset current threshold value, and the prompt information is used for prompting a user to replace the charging wire.
9. A charging system is characterized by comprising a power adapter and a mobile terminal;
the power adapter is connected with the mobile terminal through a charging wire;
the mobile terminal comprises a mobile terminal according to any of claims 1 to 4.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/099614 WO2018053724A1 (en) | 2016-09-21 | 2016-09-21 | Mobile terminal, charging method, and charging system |
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| Publication Number | Publication Date |
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| CN108370171A CN108370171A (en) | 2018-08-03 |
| CN108370171B true CN108370171B (en) | 2022-02-22 |
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| WO2020223903A1 (en) * | 2019-05-07 | 2020-11-12 | Oppo广东移动通信有限公司 | Charging current control method, electronic device, and power supply apparatus |
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| CN108370171A (en) | 2018-08-03 |
| WO2018053724A1 (en) | 2018-03-29 |
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