CN113162197A - Charging method and device and computer readable storage medium - Google Patents
Charging method and device and computer readable storage medium Download PDFInfo
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- CN113162197A CN113162197A CN202110519309.1A CN202110519309A CN113162197A CN 113162197 A CN113162197 A CN 113162197A CN 202110519309 A CN202110519309 A CN 202110519309A CN 113162197 A CN113162197 A CN 113162197A
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- 238000007600 charging Methods 0.000 title claims abstract description 222
- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000004590 computer program Methods 0.000 claims description 18
- 238000010280 constant potential charging Methods 0.000 claims description 16
- 238000010277 constant-current charging Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
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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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
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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
Abstract
A charging method and device, and a computer-readable storage medium, the charging method comprising: acquiring a first control signal output by equipment to be charged; when a first voltage value corresponding to the first control signal is determined to be within a first voltage range, outputting a first feedback signal; acquiring a second control signal output by the device to be charged, wherein the second control signal is sent by the device to be charged after receiving the first feedback signal; and outputting a second feedback signal when determining that a second voltage value corresponding to the second control signal is in a second voltage range. By adopting the scheme, the equipment to be charged can acquire the charging mode supported by the charger, so that the charging process is adjusted in a targeted manner, and quick charging is realized.
Description
Technical Field
The present invention relates to the field of charging technologies, and in particular, to a charging method and apparatus, and a computer-readable storage medium.
Background
The existing USB national standard charger generally includes four pins: VBUS pin, DP pin, DM pin and GND pin, wherein, VBUS pin is the output pin of charger, and DP pin and DM pin are two signal pin of USB interface. When a device to be charged, such as a mobile terminal like a mobile phone, is charged through a charger, the device to be charged judges whether the current charger is a national standard charger by detecting whether the DM port and the DP port of the charger are short-circuited.
In the existing version 2.0 of the fast charging protocol, the charger needs to perform two handshaking processes with the device to be charged before outputting electric energy to the device to be charged. After the two handshaking processes are completed, the charger outputs power to the device to be charged.
However, during the charging process, the device to be charged does not know the charging mode supported by the charger, and the charging strategy cannot be adjusted in a targeted manner.
Disclosure of Invention
The embodiment of the invention solves the technical problem that the equipment to be charged cannot know the charging mode supported by the charger.
To achieve the above object, an embodiment of the present invention provides a charging method, including: acquiring a first control signal output by equipment to be charged; when a first voltage value corresponding to the first control signal is determined to be within a first voltage range, outputting a first feedback signal; after receiving the first control signal, the device to be charged determines to complete a first handshake process; acquiring a second control signal output by the device to be charged, wherein the second control signal is sent by the device to be charged after receiving the first feedback signal; and when determining that a second voltage value corresponding to the second control signal is in a second voltage range, outputting a second feedback signal and indicating a currently supported charging mode to the device to be charged.
Optionally, the indicating a currently supported charging mode to the device to be charged includes: and after the second feedback signal is output, outputting a pulse signal to the device to be charged, wherein the duration and the amplitude of the pulse signal are used for representing the currently supported charging mode.
Optionally, the indicating a currently supported charging mode to the device to be charged includes: indicating the currently supported charging mode to the device to be charged by adopting the second feedback signals with different duration and amplitude; the currently supported charging mode includes at least one of: a constant voltage charging mode, a constant current charging mode.
Optionally, after indicating the currently supported charging mode to the device to be charged, the method further includes: acquiring a charging parameter adjusting signal output by the equipment to be charged, and adjusting the current output charging parameter; the charging parameter adjustment signal is generated for the device to be charged according to the currently supported charging mode.
Optionally, the obtaining of the charging parameter adjustment signal output by the device to be charged to adjust the currently output charging parameter includes: acquiring a control current value output by the equipment to be charged; acquiring a target charging parameter corresponding to the control current value according to a preset corresponding relation; and adjusting the current output charging parameter to the target charging parameter.
Optionally, the obtaining of the charging parameter adjustment signal output by the device to be charged to adjust the currently output charging parameter includes: receiving a control current value output by the equipment to be charged; and adjusting the current output charging parameter according to a preset adjustment step length according to the size of the control current value.
The embodiment of the invention also provides a charging method of the equipment to be charged, which comprises the following steps: detecting that connection with a charger is established, and outputting a first control signal; receiving a first feedback signal; the first feedback signal is generated correspondingly by the charger when detecting that a first voltage value corresponding to the first control signal is in a first voltage range; outputting a second control signal; receiving a second feedback signal, and acquiring a charging mode currently supported by the charger according to the instruction of the charger; the second feedback signal is generated by the charger when detecting that a second voltage value corresponding to the second control signal is in a second voltage range.
Optionally, the obtaining the current charging mode supported by the charger according to the instruction of the charger includes: after receiving the second feedback signal, receiving a pulse signal output by the charger; and acquiring the current charging mode supported by the charger according to the duration and the amplitude of the pulse signal.
Optionally, the obtaining the current charging mode supported by the charger according to the instruction of the charger includes: and acquiring the duration and the amplitude of the second feedback signal, and determining the current charging mode supported by the charger.
Optionally, after obtaining the current charging mode supported by the charger according to the instruction of the charger, the method further includes: generating and outputting a charging parameter adjusting signal according to a charging mode currently supported by the charger so that the charger adjusts the current charging parameter; the currently supported charging mode includes at least one of: a constant voltage charging mode, a constant current charging mode.
Optionally, the outputting the charging parameter adjustment signal includes: outputting a control current value, wherein the control current value corresponds to a target charging parameter; causing the charger to adjust the current charging parameter to the target charging parameter.
Optionally, the outputting the charging parameter adjustment signal includes: outputting a control current value, wherein the control current value corresponds to the adjustment step length; and the charger adjusts the current charging parameter according to the adjustment step length corresponding to the control current value.
An embodiment of the present invention further provides a charging device, including: the first acquisition unit is used for acquiring a first control signal output by the equipment to be charged; the first output unit is used for outputting a first feedback signal when a first voltage value corresponding to the first control signal is determined to be in a first voltage range; a second obtaining unit, configured to obtain a second control signal output by the device to be charged, where the second control signal is sent by the device to be charged after receiving the first feedback signal; and the second output unit is used for outputting a second feedback signal and indicating the currently supported charging mode to the device to be charged when the second voltage value corresponding to the second control signal is determined to be in a second voltage range.
The embodiment of the invention also provides a charging device of equipment to be charged, which comprises: the third output unit is used for detecting that the connection with the charger is established and outputting a first control signal; a first receiving unit for receiving a first feedback signal; the first feedback signal is generated correspondingly by the charger when detecting that a first voltage value corresponding to the first control signal is in a first voltage range; a fourth output unit for outputting the second control signal; the second receiving unit is used for receiving a second feedback signal and acquiring a current charging mode supported by the charger according to the instruction of the charger; the second feedback signal is generated by the charger when detecting that a second voltage value corresponding to the second control signal is in a second voltage range.
An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has a computer program stored thereon, where the computer program is executed by a processor to perform any one of the steps of the above-mentioned charging method, or to perform any one of the steps of the above-mentioned charging method for a device to be charged.
The embodiment of the present invention further provides another charging device, which includes a memory and a processor, where the memory stores a computer program that can be executed on the processor, and the processor executes any of the steps of the charging method when executing the computer program.
The embodiment of the present invention further provides another charging apparatus for a device to be charged, which includes a memory and a processor, where the memory stores a computer program that can be executed on the processor, and the processor executes any of the steps of the charging method for the device to be charged when executing the computer program.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
after receiving a first control signal output by the device to be charged, if detecting that a first voltage value corresponding to the first control signal is within a first voltage range, the charger outputs a first feedback signal to complete a first handshake process with the device to be charged. And after receiving the first feedback signal, the equipment to be charged outputs a second control signal to the charger. And when detecting that a second voltage value corresponding to the second control signal is within a second voltage range, the charger outputs a second feedback signal to the equipment to be charged, so that a second handshake process with the equipment to be charged is completed. The charger indicates the current supported charging mode to the device to be charged, so that the device to be charged can output a charging parameter adjusting signal to the charger in a targeted manner after knowing the charging mode of the charger, and further adjust the charging process and the charging speed.
In addition, the duration and the amplitude of the second feedback signal are adopted to represent the charging mode currently supported by the charger, the charger is not required to send other signals to inform the device to be charged, and communication overhead between the charger and the device to be charged can be saved.
Drawings
Fig. 1 is a flow chart of a charging method in an embodiment of the invention;
fig. 2 is a flowchart of a charging method of a device to be charged according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a charging device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a charging device of a device to be charged in an embodiment of the present invention;
Detailed Description
As described in the above background art, in the prior art, the device to be charged cannot know the charging mode supported by the charger.
In the embodiment of the invention, the charger indicates the currently supported charging mode to the device to be charged, so that the device to be charged can pertinently output a charging parameter adjusting signal to the charger after knowing the charging mode of the charger, and further adjust the charging process and the charging speed.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
An embodiment of the present invention provides a charging method, which is described in detail below with reference to fig. 1 through specific steps.
Step S101, a first control signal output by the device to be charged is obtained.
In a specific implementation, the device to be charged may be any device that includes a device capable of storing electric energy, the charger may be a charger that includes a USB interface, and the device to be charged and the charger perform information interaction and current transmission through USB. The device to be charged can be a mobile phone terminal, a tablet personal computer, or a device capable of storing electric energy, such as a power bank, a mobile power supply, or other devices, as long as the device can store electric energy, and details are not repeated here.
In practical applications, the existing USB national standard charger generally includes four pins: VBUS pin, DP pin, DM pin and GND pin, wherein, VBUS pin is the output pin of charger, and DP pin and DM pin are two signal pin of USB interface. When a device to be charged, such as a mobile terminal like a mobile phone, is charged by a charger, the device to be charged needs to detect whether the charger connected to the device to be charged is a national standard charger.
In the embodiment of the invention, after the device to be charged detects that the charger is a national standard charger, whether the charger supports a quick charging protocol needs to be determined. When determining whether the charger supports the quick charging protocol, the device to be charged needs to complete two handshaking processes with the charger.
In a specific implementation, after the device to be charged determines that the current charger is a national standard charger, the device to be charged may output a first control signal. Specifically, the device to be charged may output a first control signal to the charger, and the first control signal may be output via the DM interface.
In the embodiment of the present invention, the first control signal may be the first control current, and may also be other types of control signals. In a specific application, the current value of the first control current may be set in advance, for example, set to 45 μ a.
In a specific implementation, a current source may be provided in the device to be charged, and the first control current may be output through the current source. A plurality of current sources can be arranged in the equipment to be charged, and the output current values corresponding to different current sources can be different, so that the control currents with different output current values of the equipment to be charged are realized. The current source in the device to be charged can also be a variable current source, and different control currents are output by adjusting the output current value of the variable current source.
As in the above example, when the control current output by the variable current source is 45 μ a, it can be characterized that the device to be charged outputs the first control current.
Step S102, when the first voltage value corresponding to the first control signal is determined to be in a first voltage range, outputting a first feedback signal.
In a specific implementation, when the charger determines that the first voltage value corresponding to the first control signal is within the first voltage range, the first feedback signal may be generated and output. The charger may output a first feedback signal to the device to be charged through the DM interface.
In the embodiment of the present invention, when the charger determines that the first voltage value corresponding to the first control signal is within the first voltage range, a duration that the first voltage value is within the first voltage range may be detected. If the duration that the first voltage value is within the first voltage range reaches a preset duration, a first feedback signal is generated and output, so that misjudgment caused by interference of factors such as noise and the like is avoided.
For example, the preset one-time period is 20 ms. And when the charger detects that the first voltage value is within the first voltage range for 20ms, generating and outputting a first feedback signal.
In a specific implementation, a voltage detection circuit may be disposed in the charger, and the voltage detection circuit detects a first voltage value corresponding to the first control signal, so as to determine whether the first voltage value is within a first voltage range.
In an embodiment of the present invention, the first control signal may be a first control current, and the voltage detection circuit may include a resistance unit. One end of the resistance unit may input the first control current, and the other end of the resistance unit may be grounded. When the first end of the resistance unit inputs the first control current, a voltage drop is formed between the first end of the resistance unit and the ground. The first voltage value corresponding to the first control current can be determined by detecting the voltage values at the two ends of the resistance unit.
In a specific implementation, a current detection circuit may be disposed in the charger, and the current detection circuit detects a current value corresponding to the first control signal, and further determines a first voltage value corresponding to the first control signal according to a correspondence between the current value and the voltage value.
For example, the first control signal is a first control current, and the current detection unit may determine a first voltage value corresponding to the first control current after detecting a current value corresponding to the first control current.
It can be understood that, in practical applications, there may be other methods to determine the first voltage value corresponding to the first control signal, which are not described in detail in the embodiments of the present invention.
In particular implementations, the voltage corresponding to the first feedback signal may be different than the first voltage value. In other words, the charger may feed back a first feedback signal with a voltage value different from the first voltage value to the device to be charged when detecting that the first voltage value is within the first voltage range and the duration reaches a preset duration. The charger may output a first feedback signal to the device to be charged through the DM interface. The charger and the device to be charged can both know the voltage value corresponding to the first feedback signal in advance.
Since the device to be charged is connected to the charger through the DM interface, when the charger outputs the first feedback signal, the voltage on the DM interface changes accordingly. At this time, the device to be charged can determine whether the charger outputs the first feedback signal according to the voltage value on the DM interface.
In the embodiment of the present invention, the voltage value of the first feedback signal output by the charger may be smaller than the first voltage value.
In the embodiment of the invention, after receiving the first feedback signal, the device to be charged can determine that the first handshake process with the charger is completed. According to the existing protocol, after the first handshake process is completed, the device to be charged still needs to complete a second handshake process with the charger.
And step S103, acquiring a second control signal output by the equipment to be charged.
In a specific implementation, the device to be charged may output the second control signal to the charger after receiving the first feedback signal. Specifically, the device to be charged may start timing after receiving the first feedback signal, and output the second control signal to the charger when a timing duration reaches a preset value.
In the embodiment of the present invention, the device to be charged may send the second control signal to the charger through the DM port. The second control signal may be a second control current, or may be another type of control signal. When the second control signal is the second control current, the second control current may be equal to the first control current, or may be different from the first control current.
In an embodiment of the present invention, in order to distinguish from the first handshake process described above and avoid the occurrence of a misjudgment situation of the charger, the second control current is set to be different from the first control current.
For example, during the first handshake, the magnitude of the first control current is 45 μ Α; the magnitude of the second control current output by the device to be charged is 290 muA.
It is understood that the magnitude of the second control current may also be set according to the actual application scenario, and is not limited to the above example.
Step S104, when it is determined that the second voltage value corresponding to the second control signal is within the second voltage range, outputting a second feedback signal, and indicating the currently supported charging mode to the device to be charged.
In a specific implementation, when the charger determines that the second voltage value corresponding to the second control signal is within the second voltage range and the duration that the second voltage value is within the second voltage range reaches a preset duration, the charger may generate a second feedback signal and output the second feedback signal to the device to be charged through the DM interface.
In an embodiment of the invention, the predetermined time period is 20 ms. And when the charger detects that the duration of the second voltage value in the second voltage range reaches 20ms, generating a second feedback signal and outputting the second feedback signal to the equipment to be charged.
In the embodiment of the present invention, after receiving the second feedback signal, the device to be charged may determine that the second handshake process is completed with the charger. After the second handshaking process is completed, the charger can charge the device to be charged.
In a specific application, the charger may support different charging modes, which may include a constant current charging mode and/or a constant voltage charging mode, and the different charging modes may correspond to different charging speeds and charging efficiencies. Therefore, the charger can inform the device to be charged of the charging mode supported by the charger, and the device to be charged determines whether to charge by using the charging mode supported by the charger.
In a specific implementation, after completing the two-time handshaking procedure with the device to be charged, the charger may send a pulse signal to the device to be charged to inform the device to be charged of its supported charging mode.
In the embodiment of the invention, the duration and the amplitude of the pulse signal can be used for characterizing the charging mode supported by the charger.
For example, when the duration of the pulse signal is 20ms and the amplitude of the pulse signal is 1.5V, it is characterized that the charging mode currently supported by the charger is the low-voltage charging mode among the constant-voltage charging modes. When the duration of the pulse signal is 50ms and the amplitude of the pulse signal is 1.5V, it is characterized that the charging mode currently supported by the charger is a high-voltage charging mode in the constant-voltage charging mode. When the duration of the pulse signal is 20ms and the amplitude of the pulse signal is 2.5V, it is characterized that the charging mode currently supported by the charger is a constant current charging mode.
It should be noted that, in the above example, the duration and the amplitude of the pulse signal are merely indicative of the charging mode supported by the charger. In practical application, the duration and amplitude of the pulse signal may be set according to specific requirements, and the corresponding relationship between the charging mode supported by the charger and the pulse signal.
In specific implementation, the charger may also modulate the second feedback signal, and characterize the currently supported charging mode by the duration and amplitude of the second feedback signal without adding an additional pulse signal.
For example, when the duration of the second feedback signal is 20ms, and the amplitude of the second feedback signal is 1.5
V, the charging mode currently supported by the characterization charger is a low-voltage charging mode among the constant-voltage charging modes. When the duration of the second feedback signal is 50ms and the amplitude of the second feedback signal is 1.5V, the charging mode currently supported by the charger is characterized as the high-voltage charging mode in the constant-voltage charging mode. When the duration of the second feedback signal is 20ms and the amplitude of the second feedback signal is 2.5V, the charging mode currently supported by the charger is characterized as a constant current charging mode.
It should be noted that, in the above example, the duration and the amplitude of the second feedback signal are merely indicative of the charging mode supported by the charger. In practical application, the duration and the amplitude of the second feedback signal may be set according to specific requirements, and the corresponding relationship between the duration and the amplitude of the second feedback signal and the charging mode supported by the charger may be set according to the specific requirements.
In the prior art, when a charger connected with the charger is determined to be a national standard charger, a device to be charged is charged according to a preset fixed output voltage. However, the device to be charged is charged with a fixed output voltage regardless of the magnitude of the output voltage of the charger, and in some cases, the charging capability of the charger cannot be fully utilized.
According to the embodiment of the invention, after the device to be charged and the charger complete the second handshake process, the charger indicates the current charging mode of the device to be charged to the device to be charged, so that the device to be charged can know the current charging mode supported by the charger. The device to be charged may output a charging adjustment signal to the charger to request the charger to accelerate charging in its supported charging mode. After receiving the charging adjustment signal sent by the device to be charged, the charger can adjust the currently output electrical parameters.
In one embodiment, the charge adjustment signal may include a voltage adjustment signal and a current adjustment signal. The charger adjusts the current output electrical parameter, may adjust the current output voltage for the charger, or may adjust the current output current for the charger.
In the embodiment of the present invention, if the charging mode supported by the charger is the constant voltage charging mode, the device to be charged may output the voltage adjustment signal to the charger after receiving the second feedback signal. The device to be charged may output a voltage adjustment signal to the charger through the DM interface. After receiving the voltage adjustment signal output by the device to be charged, the charger may adjust the current output voltage according to the voltage adjustment signal.
In a specific implementation, the voltage adjustment signal output by the device to be charged may be a control current value. After receiving the control current value output by the equipment to be charged, the charger can obtain the target output voltage corresponding to the control current value, and further adjust the current output voltage of the charger to the target output voltage.
In the embodiment of the present invention, the correspondence between the current value and the voltage value may be set in advance in the charger. The correspondence relationship between the current value and the voltage value may be a linear correspondence relationship, a nonlinear correspondence relationship, a partially nonlinear correspondence relationship, or a partially linear correspondence relationship. After the charger obtains the control current value from the equipment to be charged, the charger can obtain the target output voltage corresponding to the control current value.
For example, in an embodiment of the present invention, referring to table 1, the corresponding relationship between the control current value and the target output voltage is a linear relationship.
TABLE 1
The charger obtains that the control current value from the device to be charged is 1.2mA, and the corresponding output voltage value is 3.8V as can be seen from table 1. For another example, the charger obtains a control current value from the device to be charged as 4.2mA, and as can be seen from table 1, the corresponding target output voltage is 7V.
For another example, referring to table 2, the corresponding relationship between the control current value and the target output voltage is partially linear, and partially non-linear.
| Controlling current value | Target output voltage |
| 1mA | 3.6V |
| 1.5mA | 3.8V |
| 2mA | 4.0V |
| 2.5mA | 4.2V |
| 3mA | 4.5V |
| 3.6mA | 5V |
| 4mA | 7V |
| 5mA | 9V |
| 6mA | 12V |
TABLE 2
The specific numerical values in tables 1 and 2 are merely exemplary, and do not mean that the above setting is strictly followed. In practical applications, the corresponding relationship between the control current value and the target output voltage may also be set according to specific requirements, which is not described herein.
In a specific implementation, the voltage adjustment signal output by the device to be charged may be a control current value. After receiving the control current value output by the equipment to be charged, the charger can obtain the size of the control current value, and adjust the current output voltage according to the preset adjustment step length.
The current output voltage of the charger is set to 9V. When the control current value is 110 muA, the preset adjustment step length is-0.5V; when the control current value is 185 μ a, the preset adjustment step is 0.5V.
The control current value output by the device to be charged is 110 muA. The charger adjusts the current output voltage to 8.5V after receiving the control current value (110 μ A) output by the device to be charged.
The control current value output by the device to be charged is 185 muA. The charger adjusts the current output voltage to 9.5V after receiving the control current value (185 μ A) output by the device to be charged.
It should be noted that the correspondence between the control current value and the adjustment step size is also merely exemplary. In practical application, the corresponding relationship between the control current value and the adjustment step length may be set according to specific application scenario requirements, which is not described in detail in the embodiments of the present invention.
In the embodiment of the present invention, if the charging mode supported by the charger is the constant current charging mode, the device to be charged may output the current adjusting signal to the charger after receiving the second feedback signal. The device to be charged may output a current adjustment signal to the charger through the DM interface. After receiving the current adjustment signal output by the device to be charged, the charger may adjust the current output current according to the current adjustment signal.
In a specific implementation, the current adjustment signal output by the device to be charged may be a control current value. After receiving the control current value output by the equipment to be charged, the charger can obtain the target output current corresponding to the control current value, and further adjust the current output current of the charger to the target output current.
For example, the control current value is set to 110 μ a, and the corresponding target output current is set to 1A. When the charger detects that the control current value output by the equipment to be charged is 110 muA, the current output current value can be adjusted to 1A.
In a specific implementation, the current adjustment signal output by the device to be charged may be a control current value. After receiving the control current value output by the equipment to be charged, the charger can obtain the size of the control current value, and adjust the current output current according to the preset adjustment step length.
For example, the present output current of the charger is set to 1A. When the control current value is 110 muA, the preset adjustment step length is-0.1A; when the control current value is 185 μ a, the preset adjustment step size is 0.1A.
The control current value output by the device to be charged is 110 muA. After receiving the control current value (110 μ A) output by the device to be charged, the charger adjusts the current output current to 0.9A.
The control current value output by the device to be charged is 185 muA. After receiving the control current value (185 μ A) output by the device to be charged, the charger adjusts the current output current to 1.1A.
It should be noted that the correspondence between the control current value and the adjustment step size is also merely exemplary. In practical application, the corresponding relationship between the control current value and the adjustment step length may be set according to specific application scenario requirements, which is not described in detail in the embodiments of the present invention.
In practical applications, in the existing fast charging protocol, the charger and the device to be charged are specified in version 1.0 to execute a handshake process, and after the handshake process is completed, the charger can supply power to the device to be charged. The 2.0 version specifies that the charger and the device to be charged execute a two-time handshaking process, and after the two-time handshaking process is completed, the charger supplies power to the device to be charged.
In practical application, after the device to be charged is connected with the charger, whether the device to be charged supports the 2.0 version of the quick charging protocol is preferentially detected. However, there may be a situation where the device to be charged supports the version 2.0 fast charge protocol, but the charger only supports the version 1.0 fast charge protocol. At this time, the device to be charged first performs a first handshake with the charger. During the second handshake, the charger does not support the fast charging protocol of the version 2.0, so the charger exits the fast charging mode after receiving the second control signal sent by the device to be charged. If the device to be charged still selects to use the 1.0 version of the fast charging protocol, the device to be charged may initiate a first handshake process to the charger again.
Referring to fig. 2, a charging method of a device to be charged according to an embodiment of the present invention is provided, and the following detailed description is provided through specific steps.
Step S201, detecting that the connection with the charger is established, and outputting a first control signal.
In a specific implementation, after the device to be charged detects that the connection with the charger is established, the device to be charged outputs a first control signal.
In a specific implementation, the device to be charged may be any device that includes a device capable of storing electric energy, the charger may be a charger that includes a USB interface, and the device to be charged and the charger perform information interaction and current transmission through USB. The device to be charged can be a mobile phone terminal, a tablet personal computer, or a device capable of storing electric energy, such as a power bank, a mobile power supply, or other devices, as long as the device can store electric energy, and details are not repeated here.
In a specific implementation, after the device to be charged determines that the current charger is a national standard charger, the device to be charged may output a first control signal. Specifically, the device to be charged may output a first control signal to the charger, and the first control signal may be output via the DM interface.
In the embodiment of the present invention, the first control signal may be the first control current, and may also be other types of control signals. In a specific application, the current value of the first control current may be set in advance, for example, set to 45 μ a.
In a specific implementation, a current source may be provided in the device to be charged, and the first control current may be output through the current source. A plurality of current sources can be arranged in the equipment to be charged, and the output current values corresponding to different current sources can be different, so that the control currents with different output current values of the equipment to be charged are realized. The current source in the device to be charged can also be a variable current source, and different control currents are output by adjusting the output current value of the variable current source.
As in the above example, when the control current output by the variable current source is 45 μ a, it can be characterized that the device to be charged outputs the first control current.
Step S202, receiving a first feedback signal.
In a specific implementation, when the charger determines that the first voltage value corresponding to the first control signal is within the first voltage range, the first feedback signal may be generated and output. The charger may output a first feedback signal to the device to be charged through the DM interface. Accordingly, the device to be charged may receive the first feedback signal through the DM port.
In the embodiment of the present invention, when the charger determines that the first voltage value corresponding to the first control signal is within the first voltage range, a duration that the first voltage value is within the first voltage range may be detected. If the duration that the first voltage value is within the first voltage range reaches a preset duration, a first feedback signal is generated and output, so that misjudgment caused by interference of factors such as noise and the like is avoided.
For example, the preset one-time period is 20 ms. And when the charger detects that the first voltage value is within the first voltage range for 20ms, generating and outputting a first feedback signal.
In a specific implementation, a voltage detection circuit may be disposed in the charger, and the voltage detection circuit detects a first voltage value corresponding to the first control signal, so as to determine whether the first voltage value is within a first voltage range.
In an embodiment of the present invention, the first control signal may be a first control current, and the voltage detection circuit may include a resistance unit. One end of the resistance unit may input the first control current, and the other end of the resistance unit may be grounded. When the first end of the resistance unit inputs the first control current, a voltage drop is formed between the first end of the resistance unit and the ground. The first voltage value corresponding to the first control current can be determined by detecting the voltage values at the two ends of the resistance unit.
In a specific implementation, a current detection circuit may be disposed in the charger, and the current detection circuit detects a current value corresponding to the first control signal, and further determines a first voltage value corresponding to the first control signal according to a correspondence between the current value and the voltage value.
For example, the first control signal is a first control current, and the current detection unit may determine a first voltage value corresponding to the first control current after detecting a current value corresponding to the first control current.
It can be understood that, in practical applications, there may be other methods to determine the first voltage value corresponding to the first control signal, which are not described in detail in the embodiments of the present invention.
In particular implementations, the voltage corresponding to the first feedback signal may be different than the first voltage value. In other words, the charger may feed back a first feedback signal with a voltage value different from the first voltage value to the device to be charged when detecting that the first voltage value is within the first voltage range and the duration reaches a preset duration. The charger may output a first feedback signal to the device to be charged through the DM interface. The charger and the device to be charged can both know the voltage value corresponding to the first feedback signal in advance.
Since the device to be charged is connected to the charger through the DM interface, when the charger outputs the first feedback signal, the voltage on the DM interface changes accordingly. At this time, the device to be charged can determine whether the charger outputs the first feedback signal according to the voltage value on the DM interface.
In the embodiment of the present invention, the voltage value of the first feedback signal output by the charger may be smaller than the first voltage value.
In the embodiment of the invention, after receiving the first feedback signal, the device to be charged can determine that the first handshake process with the charger is completed. According to the existing protocol, after the first handshake process is completed, the device to be charged still needs to complete a second handshake process with the charger.
Step S203, a second control signal is output.
In a specific implementation, after receiving the first feedback signal, the device to be charged may output a second control signal to the charger. Specifically, the device to be charged may start timing after receiving the first feedback signal, and output the second control signal to the charger when a timing duration reaches a preset value.
In the embodiment of the present invention, the device to be charged may send the second control signal to the charger through the DM port. The second control signal may be a second control current, or may be another type of control signal. When the second control signal is the second control current, the second control current may be equal to the first control current, or may be different from the first control current.
In an embodiment of the present invention, in order to distinguish from the first handshake process described above and avoid the occurrence of a misjudgment situation of the charger, the second control current is set to be different from the first control current.
For example, during the first handshake, the magnitude of the first control current is 45 μ Α; the magnitude of the second control current output by the device to be charged is 290 muA.
It is understood that the magnitude of the second control current may also be set according to the actual application scenario, and is not limited to the above example.
And step S204, receiving a second feedback signal, and acquiring a current charging mode supported by the charger according to the instruction of the charger.
In a specific implementation, when the charger determines that the second voltage value corresponding to the second control signal is within the second voltage range and the duration that the second voltage value is within the second voltage range reaches a preset duration, the charger may generate a second feedback signal and output the second feedback signal to the device to be charged through the DM interface. The voltage corresponding to the second feedback signal may be different from the second voltage value.
In an embodiment of the invention, the predetermined time period is 20 ms. And when the charger detects that the duration of the second voltage value in the second voltage range reaches 20ms, generating a second feedback signal and outputting the second feedback signal to the equipment to be charged.
In the embodiment of the present invention, after receiving the second feedback signal, the device to be charged may determine that the second handshake process is completed with the charger. After the second handshaking process is completed, the charger can charge the device to be charged.
In a specific application, the charger may support different charging modes, which may include a constant current charging mode and/or a constant voltage charging mode, and the different charging modes may correspond to different charging speeds and charging efficiencies. Therefore, the charger can inform the device to be charged of the charging mode supported by the charger, and the device to be charged determines whether to charge by using the charging mode supported by the charger.
In a specific implementation, the charger may send a pulse signal to the device to be charged to inform the device to be charged of its supported charging mode.
In the embodiment of the invention, the duration and the amplitude of the pulse signal can be used for characterizing the charging mode supported by the charger.
For example, when the duration of the pulse signal is 20ms and the amplitude of the pulse signal is 1.5V, it is characterized that the charging mode currently supported by the charger is the low-voltage charging mode among the constant-voltage charging modes. When the duration of the pulse signal is 50ms and the amplitude of the pulse signal is 1.5V, it is characterized that the charging mode currently supported by the charger is a high-voltage charging mode in the constant-voltage charging mode. When the duration of the pulse signal is 20ms and the amplitude of the pulse signal is 2.5V, it is characterized that the charging mode currently supported by the charger is a constant current charging mode.
It should be noted that, in the above example, the duration and the amplitude of the pulse signal are merely indicative of the charging mode supported by the charger. In practical application, the duration and amplitude of the pulse signal may be set according to specific requirements, and the corresponding relationship between the charging mode supported by the charger and the pulse signal.
In a specific implementation, the charger may send a pulse signal to the device to be charged after sending the first feedback signal to the device to be charged. The charger may also send a pulse signal to the device to be charged after sending the second feedback signal to the device to be charged.
In specific implementation, the charger may also modulate the second feedback signal, and characterize the currently supported charging mode by the duration and amplitude of the second feedback signal without adding an additional pulse signal.
In an embodiment of the present invention, when the duration of the second feedback signal is 20ms and the amplitude of the second feedback signal is 1.5V, the charging mode currently supported by the charger is the low-voltage direct charging mode in the constant-voltage charging mode. When the duration of the second feedback signal is 50ms and the amplitude of the second feedback signal is 1.5V, the charging mode currently supported by the charger is characterized as the high-voltage charging mode in the constant-voltage charging mode. When the duration of the second feedback signal is 20ms and the amplitude of the second feedback signal is 2.5V, the charging mode currently supported by the charger is characterized as a constant current charging mode.
It should be noted that, in the above example, the duration and the amplitude of the second feedback signal are merely indicative of the charging mode supported by the charger. In practical application, the duration and the amplitude of the second feedback signal may be set according to specific requirements, and the corresponding relationship between the duration and the amplitude of the second feedback signal and the charging mode supported by the charger may be set according to the specific requirements.
In the prior art, when a charger connected with the charger is determined to be a national standard charger, a device to be charged is charged according to a preset fixed output voltage. However, the device to be charged is charged with a fixed output voltage regardless of the magnitude of the output voltage of the charger, and in some cases, the charging capability of the charger cannot be fully utilized.
According to the embodiment of the invention, after the device to be charged and the charger complete the second handshake process, the device to be charged can acquire the charging mode currently supported by the charger. The device to be charged may output a charging adjustment signal to the charger to request the charger to accelerate charging in its supported charging mode. After receiving the charging adjustment signal sent by the device to be charged, the charger can adjust the currently output electrical parameters.
In one embodiment, the charge adjustment signal may include a voltage adjustment signal and a current adjustment signal. The charger adjusts the current output electrical parameter, may adjust the current output voltage for the charger, or may adjust the current output current for the charger.
In the embodiment of the present invention, if the charging mode supported by the charger is the constant voltage charging mode, the device to be charged may output the voltage adjustment signal to the charger after receiving the second feedback signal. The device to be charged may output a voltage adjustment signal to the charger through the DM interface. After receiving the voltage adjustment signal output by the device to be charged, the charger may adjust the current output voltage according to the voltage adjustment signal.
In a specific implementation, the voltage adjustment signal output by the device to be charged may be a control current value. After receiving the control current value output by the equipment to be charged, the charger can obtain the target output voltage corresponding to the control current value, and further adjust the current output voltage of the charger to the target output voltage.
In the embodiment of the present invention, the correspondence between the current value and the voltage value may be set in advance in the charger. The correspondence relationship between the current value and the voltage value may be a linear correspondence relationship, a nonlinear correspondence relationship, a partially nonlinear correspondence relationship, or a partially linear correspondence relationship. After the charger obtains the control current value from the equipment to be charged, the charger can obtain the target output voltage corresponding to the control current value.
In a specific implementation, the voltage adjustment signal output by the device to be charged may be a control current value. After receiving the control current value output by the equipment to be charged, the charger can obtain the size of the control current value, and adjust the current output voltage according to the preset adjustment step length.
The current output voltage of the charger is set to 9V. When the control current value is 110 muA, the preset adjustment step length is-0.5V; when the control current value is 185 μ a, the preset adjustment step is 0.5V.
The control current value output by the device to be charged is 110 muA. The charger adjusts the current output voltage to 8.5V after receiving the control current value (110 μ A) output by the device to be charged.
The control current value output by the device to be charged is 185 muA. The charger adjusts the current output voltage to 9.5V after receiving the control current value (185 μ A) output by the device to be charged.
It should be noted that the correspondence between the control current value and the adjustment step size is also merely exemplary. In practical application, the corresponding relationship between the control current value and the adjustment step length may be set according to specific application scenario requirements, which is not described in detail in the embodiments of the present invention.
In the embodiment of the present invention, if the charging mode supported by the charger is the constant current charging mode, the device to be charged may output the current adjusting signal to the charger after receiving the second feedback signal. The device to be charged may output a current adjustment signal to the charger through the DM interface. After receiving the current adjustment signal output by the device to be charged, the charger may adjust the current output current according to the current adjustment signal.
In a specific implementation, the current adjustment signal output by the device to be charged may be a control current value. After receiving the control current value output by the equipment to be charged, the charger can obtain the target output current corresponding to the control current value, and further adjust the current output current of the charger to the target output current.
For example, the control current value is set to 110 μ a, and the corresponding target output current is set to 1A. When the charger detects that the control current value output by the equipment to be charged is 110 muA, the current output current value can be adjusted to 1A.
In a specific implementation, the current adjustment signal output by the device to be charged may be a control current value. After receiving the control current value output by the equipment to be charged, the charger can obtain the size of the control current value, and adjust the current output current according to the preset adjustment step length.
For example, the present output current of the charger is set to 1A. When the control current value is 110 muA, the preset adjustment step length is-0.1A; when the control current value is 185 μ a, the preset adjustment step size is 0.1A.
The control current value output by the device to be charged is 110 muA. After receiving the control current value (110 μ A) output by the device to be charged, the charger adjusts the current output current to 0.9A.
The control current value output by the device to be charged is 185 muA. After receiving the control current value (185 μ A) output by the device to be charged, the charger adjusts the current output current to 1.1A.
It should be noted that the correspondence between the control current value and the adjustment step size is also merely exemplary. In practical application, the corresponding relationship between the control current value and the adjustment step length may be set according to specific application scenario requirements, which is not described in detail in the embodiments of the present invention.
In implementations, the charging mode may also be characterized by the duration and magnitude of the first feedback signal. Specifically, the principle and process of the charging mode are characterized by the duration and amplitude of the first feedback signal, and the principle and process of the charging mode are characterized by the duration and amplitude of the second feedback signal in the above example.
In a specific implementation, when the charging mode is characterized by the duration and the amplitude of the pulse signal, the pulse signal may be sent after the charger sends the first feedback signal to the device to be charged, or after the charger sends the second feedback signal to the device to be charged.
Referring to fig. 3, a schematic structural diagram of a charging device 30 in an embodiment of the present invention is provided, including: a first acquisition unit 301, a first output unit 302, a second acquisition unit 303, and a second output unit 304, wherein:
a first obtaining unit 301, configured to obtain a first control signal output by a device to be charged;
a first output unit 302, configured to output a first feedback signal when it is determined that a first voltage value corresponding to the first control signal is within a first voltage range;
a second obtaining unit 303, configured to obtain a second control signal output by the device to be charged, where the second control signal is sent by the device to be charged after receiving the first feedback signal;
a second output unit 304, configured to output a second feedback signal and indicate a currently supported charging mode to the device to be charged when it is determined that a second voltage value corresponding to the second control signal is within a second voltage range.
In a specific implementation, the specific execution flows of the first obtaining unit 301, the first output unit 302, the second obtaining unit 303, and the second output unit 304 may refer to steps S101 to S104, which is not described in detail in this embodiment of the present invention.
An embodiment of the present invention further provides a charging apparatus 40 for a device to be charged, including: a third output unit 401, a first receiving unit 402, a fourth output unit 403, and a second receiving unit 404, wherein:
a third output unit 401, configured to detect that a connection with the charger is established, and output a first control signal;
a first receiving unit 402, configured to receive a first feedback signal; the first feedback signal is generated correspondingly by the charger when detecting that a first voltage value corresponding to the first control signal is in a first voltage range;
a fourth output unit 403 for outputting a second control signal;
a second receiving unit 404, configured to receive a second feedback signal, and obtain a charging mode currently supported by the charger according to an instruction of the charger; the second feedback signal is generated by the charger when detecting that a second voltage value corresponding to the second control signal is in a second voltage range.
In a specific implementation, the specific execution flows of the third output unit 401, the first receiving unit 402, the fourth output unit 403, and the second receiving unit 404 may refer to steps S201 to S204, which is not described in detail in this embodiment of the present invention.
The embodiment of the present invention further provides a computer storage medium, where the computer readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and a computer program is stored on the computer readable storage medium, and when the computer program runs, the steps of the charging method provided in the above step S101 to step S104 are executed; or, the steps of the method for charging the device to be charged provided in the above steps S201 to S204 are executed.
The embodiment of the present invention further provides another charging device, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the charging method described in the above steps S101 to S104 when running the computer program.
The embodiment of the present invention further provides another charging apparatus for a device to be charged, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the charging method described in the above steps S201 to S204 when running the computer program.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (17)
1. A method of charging, comprising:
acquiring a first control signal output by equipment to be charged;
when a first voltage value corresponding to the first control signal is determined to be within a first voltage range, outputting a first feedback signal; after receiving the first control signal, the device to be charged determines to complete a first handshake process;
acquiring a second control signal output by the device to be charged, wherein the second control signal is sent by the device to be charged after receiving the first feedback signal;
and when determining that a second voltage value corresponding to the second control signal is in a second voltage range, outputting a second feedback signal and indicating a currently supported charging mode to the device to be charged.
2. The charging method of claim 1, wherein said indicating to the device to be charged a currently supported charging mode comprises:
and after the second feedback signal is output, outputting a pulse signal to the device to be charged, wherein the duration and the amplitude of the pulse signal are used for representing the currently supported charging mode.
3. The charging method of claim 1, wherein said indicating to the device to be charged a currently supported charging mode comprises:
indicating the currently supported charging mode to the device to be charged by adopting the second feedback signals with different duration and amplitude; the currently supported charging mode includes at least one of: a constant voltage charging mode, a constant current charging mode.
4. The charging method according to any one of claims 1 to 3, further comprising, after indicating a currently supported charging mode to the device to be charged:
acquiring a charging parameter adjusting signal output by the equipment to be charged, and adjusting the current output charging parameter; the charging parameter adjustment signal is generated for the device to be charged according to the currently supported charging mode.
5. The charging method according to claim 4, wherein the obtaining of the charging parameter adjustment signal output by the device to be charged to adjust the currently output charging parameter comprises:
acquiring a control current value output by the equipment to be charged;
acquiring a target charging parameter corresponding to the control current value according to a preset corresponding relation;
and adjusting the current output charging parameter to the target charging parameter.
6. The charging method according to claim 4, wherein the obtaining of the charging parameter adjustment signal output by the device to be charged to adjust the currently output charging parameter comprises:
receiving a control current value output by the equipment to be charged;
and adjusting the current output charging parameter according to a preset adjustment step length according to the size of the control current value.
7. A method of charging a device to be charged, comprising:
detecting that connection with a charger is established, and outputting a first control signal;
receiving a first feedback signal; the first feedback signal is generated correspondingly by the charger when detecting that a first voltage value corresponding to the first control signal is in a first voltage range;
outputting a second control signal;
receiving a second feedback signal, and acquiring a charging mode currently supported by the charger according to the instruction of the charger; the second feedback signal is generated by the charger when detecting that a second voltage value corresponding to the second control signal is in a second voltage range.
8. The method for charging a device to be charged according to claim 7, wherein the obtaining of the charging mode currently supported by the charger according to the indication of the charger comprises:
after receiving the second feedback signal, receiving a pulse signal output by the charger;
and acquiring the current charging mode supported by the charger according to the duration and the amplitude of the pulse signal.
9. The method for charging a device to be charged according to claim 7, wherein the obtaining of the charging mode currently supported by the charger according to the indication of the charger comprises:
and acquiring the duration and the amplitude of the second feedback signal, and determining the current charging mode supported by the charger.
10. The method for charging a device to be charged according to claim 7, after acquiring the charging mode currently supported by the charger according to the instruction of the charger, further comprising:
generating and outputting a charging parameter adjusting signal according to a charging mode currently supported by the charger so that the charger adjusts the current charging parameter; the currently supported charging mode includes at least one of: a constant voltage charging mode, a constant current charging mode.
11. The method for charging a device to be charged according to claim 10, wherein said outputting a charging parameter adjustment signal comprises:
outputting a control current value, wherein the control current value corresponds to a target charging parameter; causing the charger to adjust the current charging parameter to the target charging parameter.
12. The method for charging a device to be charged according to claim 10, wherein said outputting a charging parameter adjustment signal comprises:
outputting a control current value, wherein the control current value corresponds to the adjustment step length; and the charger adjusts the current charging parameter according to the adjustment step length corresponding to the control current value.
13. A charging device, comprising:
the first acquisition unit is used for acquiring a first control signal output by the equipment to be charged;
the first output unit is used for outputting a first feedback signal when a first voltage value corresponding to the first control signal is determined to be in a first voltage range;
a second obtaining unit, configured to obtain a second control signal output by the device to be charged, where the second control signal is sent by the device to be charged after receiving the first feedback signal;
and the second output unit is used for outputting a second feedback signal and indicating the currently supported charging mode to the device to be charged when the second voltage value corresponding to the second control signal is determined to be in a second voltage range.
14. A charging apparatus for a device to be charged, comprising:
the third output unit is used for detecting that the connection with the charger is established and outputting a first control signal;
a first receiving unit for receiving a first feedback signal; the first feedback signal is generated correspondingly by the charger when detecting that a first voltage value corresponding to the first control signal is in a first voltage range;
a fourth output unit for outputting the second control signal;
the second receiving unit is used for receiving a second feedback signal and acquiring a current charging mode supported by the charger according to the instruction of the charger; the second feedback signal is generated by the charger when detecting that a second voltage value corresponding to the second control signal is in a second voltage range.
15. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having a computer program stored thereon, wherein the computer program, when being executed by a processor, is configured to perform the steps of the charging method according to any one of claims 1 to 6, or the steps of the charging method of a device to be charged according to any one of claims 7 to 12.
16. A charging device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the charging method according to any one of claims 1 to 6.
17. A charging device for a device to be charged, comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the method for charging a device to be charged according to any one of claims 7 to 12.
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Application publication date: 20210723 |