CN109787303B - Overcurrent protection method, device and storage medium - Google Patents
Overcurrent protection method, device and storage medium Download PDFInfo
- Publication number
- CN109787303B CN109787303B CN201711116679.0A CN201711116679A CN109787303B CN 109787303 B CN109787303 B CN 109787303B CN 201711116679 A CN201711116679 A CN 201711116679A CN 109787303 B CN109787303 B CN 109787303B
- Authority
- CN
- China
- Prior art keywords
- charger
- output
- voltage
- target
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The disclosure relates to an overcurrent protection method, an overcurrent protection device and a storage medium, and belongs to the technical field of wireless charging. The method is applied to a wireless charging transmitting terminal (WT) and comprises the following steps: determining charging capability information of a target charger connected to the WT, the charging capability information including at least one output voltage that the target charger is capable of outputting and a corresponding output capability indicating a maximum allowed output current at the corresponding output voltage; and sending the charging capability information to a wireless charging receiving end (WR) connected with the WT, wherein the charging capability information is used for instructing the WR to select a target output voltage from at least one output voltage according to the load requirement and select a charging current for charging according to the output capability corresponding to the target output voltage. Therefore, the charging current selected by the WR can be ensured not to exceed the output capacity of the target charger, the overcurrent interruption of the charger is avoided, and the charging performance of the charger is ensured.
Description
Technical Field
The present disclosure relates to the field of wireless charging technologies, and in particular, to an overcurrent protection method and apparatus, and a storage medium.
Background
With the development of charging technology, wireless charging technology capable of charging based on a wireless charging system has emerged. The Wireless charging system includes a charger, a Wireless Transmitter (WT) and a Wireless Receiver (WR). The charger and the WT can be connected in a wired or wireless manner, the WT and the WR can be connected in a wireless manner, the charger is used for supplying power to the WT, and the WT is used for charging the WR. Furthermore, the wireless charging system further includes a load, which may be integrated with or connected to the WR, and the WT may charge the load through the WR during the charging of the WR.
When the WR is charged, the WR can select any current within the range of the current allowed by the load battery as the charging current for charging, but the charging current selected by the WR may exceed the output capability of the charger, that is, at the charging current selected by the WR, the output current required to be output by the charger will be greater than the maximum allowed output current of the charger, so that the overcurrent interruption of the charger is caused, and the service life of the charger is affected.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides an overcurrent protection method, apparatus, and storage medium.
According to a first aspect of the embodiments of the present disclosure, there is provided an overcurrent protection method applied to a wireless charging transmitter WT, the method including:
determining charging capability information of a target charger connected to the WT, the charging capability information including at least one output voltage that the target charger is capable of outputting and a corresponding output capability indicating a maximum allowed output current at the corresponding output voltage;
and sending the charging capability information to a wireless charging receiving end (WR) connected with the WT, wherein the charging capability information is used for instructing the WR to select a target output voltage from the at least one output voltage according to load requirements and select a charging current for charging according to the output capability corresponding to the target output voltage.
Optionally, the determining charging capability information of a target charger connected to the WT includes:
determining a charger type of the target charger;
the charger types comprise a high-voltage charger and a conventional voltage charger, the high-voltage charger is a charger capable of outputting high voltage and conventional voltage, the conventional voltage charger is a charger capable of outputting conventional voltage, and the high voltage is higher than the conventional voltage;
determining at least one output voltage which can be output by the target charger based on the charger type of the target charger;
determining a minimum allowed input voltage of the WT;
based on the minimum allowable input voltage, an output capability corresponding to each of the at least one output voltage is determined.
Optionally, the WT comprises an auxiliary circuit comprising an auxiliary load;
the determining the output capability corresponding to each output voltage in the at least one output voltage based on the minimum allowable input voltage comprises:
controlling the target charger to output a specified output voltage, wherein the specified output voltage is any one of the at least one output voltage;
loading the output voltage of the target charger on the auxiliary load, and setting the load current of the auxiliary load to be a first preset current;
determining an input voltage of the WT after setting a load current of the auxiliary load to a first preset current;
increasing a load current of the auxiliary load by a second preset current when the input voltage of the WT is greater than or equal to the minimum allowable input voltage, and determining the input voltage of the WT after increasing the load current of the auxiliary load by the second preset current;
when the input voltage of the WT is larger than or equal to the minimum allowable input voltage, the step of increasing the load current of the auxiliary load by a second preset current is executed again, and after the step of increasing the load current of the auxiliary load by the second preset current, the input voltage of the WT is determined, until the load current of the auxiliary load is smaller than the minimum allowable input voltage, the output capability corresponding to the specified output voltage is determined based on the load current of the auxiliary load before the load current of the auxiliary load is increased by the second preset current for the last time.
Optionally, after the sending the charging capability information to the WR connected to the WT, further comprising:
receiving target output voltage information sent by the WR;
and controlling the target charger to output the target output voltage according to the target output voltage information.
Optionally, the sending the charging capability information to the WR connected to the WT includes:
determining a WR to establish a connection with the WT via a Wireless charging alliance (WPC) protocol;
transmitting the charging capability information to the WR through the WPC protocol.
According to a second aspect of the embodiments of the present disclosure, there is provided an overcurrent protection apparatus applied to a wireless charging transmitter WT, the apparatus including:
a determining module, configured to determine charging capability information of a target charger connected to the WT, the charging capability information including at least one output voltage that the target charger is capable of outputting and a corresponding output capability indicating a maximum allowed output current at the corresponding output voltage;
a sending module, configured to send the charging capability information to a wireless charging receiving end WR connected to the WT, where the charging capability information is used to instruct the WR to select a target output voltage from the at least one output voltage according to a load battery voltage and select a charging current for charging based on an output capability corresponding to the target output voltage.
Optionally, the determining module includes:
the first determining submodule is used for determining the charger type of the target charger;
the charger types comprise a high-voltage charger and a conventional voltage charger, the high-voltage charger is a charger capable of outputting high voltage and conventional voltage, the conventional voltage charger is a charger capable of outputting conventional voltage, and the high voltage is higher than the conventional voltage;
a second determining sub-module, configured to determine, based on a charger type of the target charger, at least one output voltage that the target charger can output;
a third determination submodule for determining a minimum allowed input voltage of the WT;
and the fourth determination submodule is used for determining the output capacity corresponding to each output voltage in the at least one output voltage based on the minimum allowable input voltage.
Optionally, the WT comprises an auxiliary circuit comprising an auxiliary load; the fourth determination submodule is mainly configured to:
controlling the target charger to output a specified output voltage, wherein the specified output voltage is any one of the at least one output voltage;
loading the output voltage of the target charger on the auxiliary load, and setting the load current of the auxiliary load to be a first preset current;
determining an input voltage of the WT after setting a load current of the auxiliary load to a first preset current;
increasing a load current of the auxiliary load by a second preset current when the input voltage of the WT is greater than or equal to the minimum allowable input voltage, and determining the input voltage of the WT after increasing the load current of the auxiliary load by the second preset current;
when the input voltage of the WT is larger than or equal to the minimum allowable input voltage, the step of increasing the load current of the auxiliary load by a second preset current is executed again, and after the step of increasing the load current of the auxiliary load by the second preset current, the input voltage of the WT is determined, until the load current of the auxiliary load is smaller than the minimum allowable input voltage, the output capability corresponding to the specified output voltage is determined based on the load current of the auxiliary load before the load current of the auxiliary load is increased by the second preset current for the last time.
Optionally, the apparatus further comprises:
the receiving module is used for receiving the target output voltage information sent by the WR;
and the control module is used for controlling the target charger to output the target output voltage according to the target output voltage information.
Optionally, the sending module includes:
a fifth determining submodule, configured to determine a WR for establishing a connection with the WT through a wireless charging alliance WPC protocol;
and the sending submodule is used for sending the charging capacity information to the WR through the WPC protocol.
According to a third aspect of the embodiments of the present disclosure, there is provided an overcurrent protection apparatus, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform any of the over-current protection methods of the first aspect.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium having instructions stored thereon, where the instructions, when executed by a processor, implement any of the over-current protection methods described in the first aspect above.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in the embodiment of the disclosure, the WT may determine charging capability information of a target charger connected to the WT, and send the charging capability information to a WR connected to the WT, where the charging capability information includes at least one output voltage that the target charger can output and a corresponding output capability, and the output capability is used to indicate a maximum allowable output current at the corresponding output voltage, so that, after the WR receives the charging capability information, a target output voltage may be selected from the at least one output voltage according to a load requirement, and a charging current may be selected for charging based on the output capability corresponding to the target output voltage, so as to ensure that the charging current selected by the WR does not exceed the output capability of the target charger at the target output voltage, avoid an overcurrent interruption of the charger, and ensure charging performance of the charger.
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. 1A is a schematic diagram of a wireless charging system provided in an embodiment of the present disclosure;
fig. 1B is a schematic diagram of another wireless charging system provided by an embodiment of the present disclosure;
fig. 1C is a flowchart of an overcurrent protection method according to an embodiment of the disclosure;
fig. 2 is a flowchart of another overcurrent protection method provided by the embodiment of the disclosure;
fig. 3 is a block diagram of an overcurrent protection apparatus according to an embodiment of the present disclosure;
figure 4 is a block diagram of a WT400 provided by an embodiment of the present disclosure.
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 implementations described in the exemplary embodiments below are not intended to represent all implementations 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.
Before explaining the embodiments of the present disclosure in detail, a system architecture of the embodiments of the present disclosure will be described.
The method provided by the embodiment of the present disclosure is applied to a wireless charging system, and fig. 1A is a schematic diagram of a wireless charging system provided by the embodiment of the present disclosure, as shown in fig. 1A, the wireless charging system includes a target charger 10, a WT20, and a WR 30. The target charger 10 is connected with WT20 by wire or wirelessly, WT20 is connected with WR30 by wireless, the target charger 10 is used for supplying power to WT20, and WT20 is used for charging WR 30.
In addition, the wireless charging system also comprises a load 40, and the load 40 can be integrated with a WR30 or connected with a WR30 and positioned behind the WR 30. Fig. 1A merely exemplifies that the load 40 and the WR30 are integrated. For example, in practical applications, the WR30 may be a mobile terminal with a charging requirement, and the mobile terminal may be a mobile phone, a tablet computer, a video camera, a smart wearable device, and the like.
In the disclosed embodiment, in order to avoid an overcurrent interruption of the target charger 10 when charging the WR30 through WT20, prior to charging the target charger 10, WT20 may determine charging capability information of the target charger 10 and transmit the charging capability information to the WR30 connected to WT 20. Wherein the charging capability information includes at least one output voltage that the target charger is capable of outputting and a corresponding output capability indicating a maximum allowable output current at the corresponding output voltage.
After receiving the charging capability information sent by WT20, WR30 may select a target output voltage from the at least one output voltage according to the charging capability information and the load requirement, and select a charging current for charging based on the output capability corresponding to the target output voltage, so as to ensure that the charging current selected by WR30 does not exceed the output capability of the target charger 10 at the target output voltage, thereby avoiding an overcurrent interruption of the target charger.
Further, it should be noted that an auxiliary circuit may be added on the basis of the original WT structure, so that the WT implements the function of determining the charging capability information of the connected charger and transmitting the charging capability information to the connected WR through the added auxiliary circuit.
As shown in fig. 1A, the WT20 includes a wireless charging transmitting module 21 and an auxiliary circuit 22, the wireless charging transmitting module 21 is used to implement the function of charging WR30, and the auxiliary circuit 22 is used to implement the functions of determining charging capability information of a target charger 10 and transmitting the charging capability information to WR 30.
In practical applications, the WT20 corresponds to a wireless charging cradle, and the WR30 corresponds to a mobile terminal. Fig. 1B is a schematic diagram of another wireless charging system provided by the embodiment of the disclosure, as shown in fig. 1B, the wireless charging system includes a target charger 10, a wireless charging base 50 and a mobile terminal 60. Therein, the wireless charging cradle 50 is integrated with WT, and the mobile terminal 60 is integrated with WR and system load. The target charger 10 is connected with the wireless charging dock 50 by wire or wirelessly for supplying power to the wireless charging dock 50. The wireless charging cradle 50 is used for carrying the mobile terminal 60 and is connected with the mobile terminal 60 wirelessly so as to charge the mobile terminal 60 by a wireless charging technology. Moreover, a plurality of mobile terminals 60 can be placed on the wireless charging cradle 50 at the same time, and the placed mobile terminals 60 can be charged at the same time.
In the embodiment of the present disclosure, the wireless charging base 50 may further determine charging capability information of the target charger 10, and send the charging capability information to the mobile terminal 60, and the mobile terminal 60 may select an output voltage and a charging current for charging according to the received charging capability information and the charging requirement, and ensure that the selected charging current does not exceed the output capability of the target charger 10.
Next, a detailed description will be given of an overcurrent protection method provided by an embodiment of the present disclosure.
Fig. 1C is a flowchart of an over-current protection method provided by an embodiment of the present disclosure, where the over-current protection method is applied to the WT shown in fig. 1A or fig. 1B, as shown in fig. 1C, the over-current protection method may include the following steps:
in step 101, charging capability information of a target charger connected to the WT is determined, the charging capability information including at least one output voltage that the target charger is capable of outputting and a corresponding output capability indicating a maximum allowed output current at the corresponding output voltage.
In step 102, the charging capability information is sent to a WR connected to the WT, and the charging capability information is used for instructing the WR to select a target output voltage from the at least one output voltage according to load requirements and to select a charging current for charging based on the output capability corresponding to the target output voltage.
In the embodiment of the disclosure, the WT may determine charging capability information of a target charger connected to the WT, and send the charging capability information to a WR connected to the WT, where the charging capability information includes at least one output voltage that the target charger can output and a corresponding output capability, and the output capability is used to indicate a maximum allowable output current at the corresponding output voltage, so that, after the WR receives the charging capability information, a target output voltage may be selected from the at least one output voltage according to a load requirement, and a charging current may be selected for charging based on the output capability corresponding to the target output voltage, so as to ensure that the charging current selected by the WR does not exceed the output capability of the target charger at the target output voltage, avoid an overcurrent interruption of the charger, and ensure charging performance of the charger.
Optionally, the determining charging capability information of a target charger connected to the WT includes:
determining a charger type of the target charger;
the charger type comprises a high-voltage charger and a conventional voltage charger, wherein the high-voltage charger refers to a charger capable of outputting high voltage and conventional voltage, the conventional voltage charger refers to a charger capable of outputting conventional voltage, and the high voltage is higher than the conventional voltage;
determining at least one output voltage which can be output by the target charger based on the charger type of the target charger;
determining a minimum allowed input voltage for the WT;
based on the minimum allowable input voltage, an output capability corresponding to each of the at least one output voltage is determined.
Optionally, the WT comprises an auxiliary circuit, the auxiliary circuit comprising an auxiliary load;
the determining the output capability corresponding to each of the at least one output voltage based on the minimum allowable input voltage comprises:
controlling the target charger to output a specified output voltage, wherein the specified output voltage is any one of the at least one output voltage;
loading the output voltage of the target charger to the auxiliary load, and setting the load current of the auxiliary load to be a first preset current;
determining an input voltage of the WT after setting a load current of the auxiliary load to a first preset current;
increasing the load current of the auxiliary load by a second preset current when the input voltage of the WT is greater than or equal to the minimum allowable input voltage, and determining the input voltage of the WT after increasing the load current of the auxiliary load by the second preset current;
when the input voltage of the WT is greater than or equal to the minimum allowable input voltage, the step of increasing the load current of the auxiliary load by a second preset current is performed again, and after the step of increasing the load current of the auxiliary load by the second preset current, the input voltage of the WT is determined until the load current of the auxiliary load is less than the minimum allowable input voltage, and the output capability corresponding to the specified output voltage is determined based on the load current of the auxiliary load before the load current of the auxiliary load is increased by the second preset current for the last time.
Optionally, after the sending the charging capability information to the WR connected to the WT, further comprising:
receiving target output voltage information sent by the WR;
and controlling the target charger to output the target output voltage according to the target output voltage information.
Optionally, the sending the charging capability information to the WR connected to the WT includes:
determining a WR to establish a connection with the WT via a Wireless charging alliance (WPC) protocol;
the charging capability information is transmitted to the WR through the WPC protocol.
All the above optional technical solutions can be combined arbitrarily to form optional embodiments of the present disclosure, and the embodiments of the present disclosure are not described in detail again.
Fig. 2 is a flowchart of another overcurrent protection method provided in an embodiment of the present disclosure, where the overcurrent protection method is applied to the wireless charging system shown in fig. 1A or fig. 1B, and as shown in fig. 2, the overcurrent protection method may include the following steps:
in step 201, the target charger is connected to the WT by wire or wirelessly.
The target charger is a charger connected to the WT, and the target charger may be connected to the WT by wire or wirelessly. For example, the target charger may be connected to the WT via a USB connection, or may be connected to the WT via a wireless network or a wireless communication protocol, etc.
The target charger may transmit the charger type of the target charger to the WT after connection with the WT, so that the WT determines charging capability information of the target charger according to the charger type of the target charger. Taking the example of the target charger being connected to the WT via a wire, the target charger may send a high-low level signal to the WT via the connection line, the high-low level signal indicating the charger type of the target charger. For example, the high level signal indicates that the charger type of the target charger is a high voltage charger, and the low level signal indicates that the charger type of the target charger is a normal voltage charger.
In step 202, the WT determines charging capability information for a target charger, the charging capability information including at least one output voltage and a corresponding output capability that the target charger is capable of outputting.
In embodiments of the present disclosure, to avoid charging currents selected by WRs connected to the WT during charging from exceeding the output capabilities of the target charger, charging capability information of the target charger may be predetermined by the WT and sent to the connected WRs.
In practice, the WT may determine charging capability information of a target charger upon detecting that the target charger is connected to the WT. For example, taking the example that the target charger is connected to the WT through a USB connection line, the WT may determine the charging capability information of the target charger when detecting a connection signal of the target charger through its own USB interface.
The charging capability information includes at least one output voltage that the target charger can output, and an output capability corresponding to each of the at least one output voltage.
The output capability is indicative of a maximum allowed output current at the corresponding output voltage, i.e. a maximum allowed load current at the corresponding output voltage. That is, for any output voltage of the at least one output voltage, when the target charger outputs according to the output voltage, the output terminal of the target charger can only load a load whose load current is the maximum allowable output current corresponding to the output voltage at maximum, and when the load current of the loaded load is greater than the maximum allowable output current, the target charger interrupts the overcurrent.
Wherein at least one output voltage that the target charger can output may be determined according to a charger type of the target charger. The output capability for each output voltage may be determined based on the minimum allowable input voltage for the WT. Of course, the at least one output voltage and the corresponding output capability may also be determined in other ways, which are not limited by the embodiments of the disclosure.
In one embodiment, determining the charging capability information of the target charger may include the following steps 2021 and 2024:
step 2021: the WT determines the charger type of the target charger to which the WT is connected.
Wherein the charger types include a high voltage charger and a normal voltage charger, the high voltage charger refers to a charger capable of outputting a high voltage and a normal voltage, the normal voltage charger refers to a charger capable of outputting a normal voltage, and the high voltage is greater than the normal voltage. That is, the conventional voltage charger can only output a conventional voltage, and the high voltage charger can output both a conventional voltage and a high voltage greater than the conventional voltage.
In addition, the high voltage may also include high voltages of various voltage magnitudes. Accordingly, the high voltage charger further includes a high voltage charger capable of outputting one high voltage, and a high voltage charger capable of outputting a plurality of high voltages. For example, the high voltage charger may be a charger capable of outputting a first high voltage, a second high voltage, and a normal voltage, and the first high voltage is greater than the second high voltage.
In practical applications, the conventional voltage is typically 5V for a charger used to charge a mobile terminal. Accordingly, the conventional voltage charger refers to a charger capable of outputting only 5V voltage, and the high voltage charger refers to a charger capable of outputting both 5V voltage and more than 5V voltage. For example, the a-type high-voltage charger can output voltages of 5V and 9V, respectively, and the B-type high-voltage charger can output voltages of 5V, 9V, and 12V, respectively.
Step 2022: the WT determines at least one output voltage that the target charger is capable of outputting based on the charger type of the target charger.
Wherein, the WT determines, based on the charger type of the target charger, at least one output voltage that the target charger can output, which may include the following two implementations:
in a first implementation, when the charger type of the target charger carries voltage information of at least one output voltage that the target charger can output, the WT may determine the at least one output voltage that the target charger can output directly from the information carried by the charger type of the target charger.
In a second implementation manner, when the charger type of the target charger does not carry voltage information of at least one output voltage that the target charger can output, the WT may determine the at least one output voltage that the target charger can output based on the charger type of the target charger and a stored correspondence between the charger type and the output voltage. The corresponding relation between the charger type and the output voltage stores a plurality of voltage types and at least one output voltage which is corresponding to each voltage type and can be output. After determining the charger type of the target charger, the WT may search for at least one output voltage that can be output and that corresponds to the charger type of the target charger from the stored correspondence.
For example, when the charger type of the target charger is a regular voltage charger, it may be determined that the target charger can output a regular voltage according to the stored correspondence; when the charger type of the target charger is an A-type high-voltage charger, the target charger can be determined to be capable of outputting 5V and 9V output voltages respectively according to the stored corresponding relation; when the charger type of the target charger is a B-type high voltage charger, it may be determined that the target charger is capable of outputting output voltages of 5V, 9V, and 12V, respectively, according to the stored correspondence.
Step 2023: the WT determines a minimum allowed input voltage for the WT.
Wherein the minimum allowed input voltage is used to indicate the minimum input voltage allowed by the WT, and the WT will not work properly when the input voltage of the WT is less than the minimum allowed input voltage.
Also, the minimum allowed input voltage for the WT is within preset specification parameters for the WT, and the WT may determine the minimum allowed input voltage for the WT from the stored specification parameters. In practice, the minimum allowed input voltage may be factory set by the WT manufacturer.
Step 2024: the WT determines an output capability for each of the at least one output voltage based on the minimum allowed input voltage.
Wherein the output capability corresponding to each output voltage is used for indicating the maximum allowable output current of the target charger at the output voltage.
In the disclosed embodiments, an auxiliary circuit may be provided on the WT to determine charging capability information of the target charger through the auxiliary circuit. Further, the auxiliary circuit may further include an auxiliary load, and the WT may determine an output capability for each output voltage using a refund algorithm based on the minimum allowed input voltage and the auxiliary load.
In one embodiment, the WT includes an auxiliary circuit including an auxiliary load, and accordingly, determining the output capability corresponding to each of the at least one output voltage based on the minimum allowed input voltage may include the following steps 1) -5):
1) and controlling the target charger to output a specified output voltage, wherein the specified output voltage is any one of the at least one output voltage.
That is, for each output voltage of the at least one output voltage whose output capability is to be determined, the target charger may be controlled to output according to the output voltage. For example, when it is required to determine the output capability corresponding to the 5V voltage, the target charger may be controlled to output the 5V voltage.
2) The output voltage of the target charger is loaded to the auxiliary load, and the load current of the auxiliary load is set to a first preset current.
That is, an auxiliary load is added between the target charger and the WT terminal, and the output voltage of the target charger is transmitted to the WT terminal after being consumed by the auxiliary load.
The first predetermined current is usually a small current, such as 30mA, 50mA or 100 mA. The WT may first load an auxiliary load with a lower load current on the target charger via the auxiliary circuit.
3) After setting the load current of the auxiliary load to a first preset current, the input voltage of the WT is determined.
The WT input voltage is the output voltage of the target charger near the WT terminal, i.e. the output voltage after being consumed by the load.
4) When the input voltage of the WT is greater than or equal to the minimum allowable input voltage, the load current of the auxiliary load is increased by a second preset current, and after the load current of the auxiliary load is increased by the second preset current, the input voltage of the WT is determined.
When the input voltage of WT is greater than or equal to the minimum allowable input voltage, it indicates that the input voltage meets the allowable input range of WT and the load current of the auxiliary load is within the output capability of the target charger. In order to determine the maximum output capacity of the target charger, the load current of the auxiliary load may be continuously increased, i.e., a second predetermined current may be increased based on the first predetermined current.
The second predetermined current may be the same as the first predetermined current or different from the first predetermined current. For example, the second preset current may be 100 mA.
Also, in addition to determining the input voltage of the WT, the load current of the auxiliary load may be determined. For example, the load current of the auxiliary load in step 3) may be referred to as I1The load current of the auxiliary load after the second predetermined current is added in step 4) is called I2。
5) When the input voltage of the WT is larger than or equal to the minimum allowable input voltage, increasing the load current of the auxiliary load by a second preset current, and after increasing the load current of the auxiliary load by the second preset current, determining the input voltage of the WT again until the input voltage of the WT is smaller than the minimum allowable input voltage, and determining the output capability corresponding to the specified output voltage according to the load current of the auxiliary load before the load current of the auxiliary load is increased by the second preset current for the last time.
Wherein, determining the output capability corresponding to the specified output voltage according to the load current of the auxiliary load before the load current of the auxiliary load is increased by the second preset current for the last time means determining the load current of the auxiliary load before the load current of the auxiliary load is increased by the second preset current as the maximum allowable output current of the target charger.
In the practice of the present disclosure, if the WT input voltage determined by step 4) is still not less than the minimum allowable input voltage, the above step 4) may be repeatedly performed, and the WT input voltage may be continuously determined, or the WT input voltage and the load current of the auxiliary load may be determined. If the WT input voltage determined by step 4) is less than the minimum allowable input voltage, indicating that the WT input voltage at that time has exceeded the WT allowable input range, and the auxiliary load current at that time exceeds the output capability of the target charger, step 3) may be returned to, and the auxiliary load current of step 3) is determined as the maximum allowable output current of the target charger, i.e., I is determined as the maximum allowable output current of the target charger1The maximum allowable output current of the target charger is determined.
In the process of repeatedly executing the step 4), when the input voltage of WT determined in any step is less than the minimum allowable input voltage, the process may return to the previous step of this step, and the load current of the auxiliary load in the previous step is determined as the maximum allowable output current of the target charger. For example, if the load current of the auxiliary load in this step is InThe load current of the auxiliary load in the last step is In-1Then I can be putn-1The maximum allowable output current of the target charger is determined.
It should be noted that, after determining that the charging capability information of the target charger is obtained, the WT may store the charging capability information locally, and then, when a WR connected to the WT is detected at any time, may acquire the locally stored charging capability information and transmit the charging capability information to the WR connected to the WT.
In step 203, the WT sends the charging capability information to the WR connected to the WT.
That is, the WT may transmit at least one output voltage that the target charger can output together with an output capability corresponding to each output voltage to the WR connected to the WT.
Wherein the WT transmitting the charging capability information to a WR connected to the WT includes: determining a WR to establish a connection with the WT via a Wireless charging alliance (WPC) protocol; transmitting the charging capability information to the WR through the WPC protocol.
In practical applications, a WPC (Wireless Power Consortium) protocol is generally used for Wireless connection between a WT and a WR, and when detecting that a WR is connected to the WR through the WPC protocol, the WT may obtain stored charging capability information of a target charger and send the charging capability information to the WR through the WPC protocol.
In step 204, the WR receives the charging capability information, selects a target output voltage from at least one output voltage included in the charging capability information according to a load requirement, and selects a charging current according to an output capability corresponding to the target output voltage for charging.
After receiving the charging capability information, the WR may select a target output voltage from at least one output voltage included in the charging capability information according to a load demand, obtain the target output voltage, determine an output capability corresponding to the target output voltage from the output capabilities corresponding to the at least one output voltage, and select a charging voltage according to the output capability corresponding to the target output voltage for charging.
The WR may select a target output voltage from the at least one output voltage according to the charging requirement of the load, so that the target charger outputs the target output voltage to the WR for charging. For example, when the load is in need of charging, the high-voltage output voltage may be selected for charging, and when the load is not in need of charging, the normal output voltage may be selected for charging. Wherein the charging requirement of the load may be determined according to a battery voltage of the load, and the WR may select the target output voltage from the at least one output voltage according to the battery voltage of the load. Wherein the battery voltage of the load is capable of indicating the remaining capacity of the load battery.
Wherein, selecting a charging voltage for charging according to the output capability corresponding to the target output voltage comprises: the maximum output current of the target charger under the target output voltage is determined according to the output capacity corresponding to the target output voltage, then the maximum output current is converted into the maximum charging current of the WR according to the efficiency conversion factors of WT and WR, and then the charging current smaller than or equal to the maximum charging current is selected for charging, so that when the WR is charged according to the selected target output voltage and charging current, the target charger is ensured to output the output current which is not larger than the maximum allowable output current under the condition that the target charger outputs the target output voltage, and overcurrent interruption of the target charger is avoided.
Further, the charging current that WR needs to be selected needs to be not only less than or equal to the maximum charging current, but also less than the maximum allowable current of the load battery. That is, after the WR converts the maximum output current to the maximum charging current of the WR, a charging current less than or equal to the maximum charging current and less than or equal to the maximum allowable current of the load battery needs to be selected for charging.
In step 205, the WR sends target output voltage information to the WT based on the selected target output voltage.
Wherein the target output voltage information is used to indicate the target output voltage. After the WR is selected to achieve the target output voltage according to the load requirements, target output voltage information may also need to be sent to the WT to indicate to the WT the target output voltage selected by the WR.
In practical applications, the WR may send the target output voltage information to the WT via the WPC protocol
In step 206, the WT receives the target output voltage information and controls the target charger to output the target output voltage according to the target output voltage information.
After the WT receives the target output voltage information, the WT may control the target charger to output the output voltage with the target output voltage, so as to charge the WR according to the target output voltage selected by the WR.
For example, when the target charger is a high voltage charger and the WR selects a high voltage, the WT needs to control the target charger to output the high voltage, and when the target charger is a high voltage charger and the WR selects a regular voltage, the WT needs to control the target charger to output the regular voltage.
In the embodiment of the disclosure, the WT may determine charging capability information of a target charger connected to the WT, and send the charging capability information to a WR connected to the WT, where the charging capability information includes at least one output voltage that the target charger can output and a corresponding output capability, and the output capability is used to indicate a maximum allowable output current at the corresponding output voltage, so that, after the WR receives the charging capability information, a target output voltage may be selected from the at least one output voltage according to a load requirement, and a charging current may be selected for charging based on the output capability corresponding to the target output voltage, so as to ensure that the charging current selected by the WR does not exceed the output capability of the target charger at the target output voltage, avoid an overcurrent interruption of the charger, and ensure charging performance of the charger.
Fig. 3 is a block diagram of an overcurrent protection apparatus provided by an embodiment of the present disclosure, which is applied to a WT, and as shown in fig. 3, the overcurrent protection apparatus includes a determining module 301 and a sending module 302.
The determining module 301 is configured to determine charging capability information of a target charger connected to the WT, where the charging capability information includes at least one output voltage that the target charger can output and a corresponding output capability indicating a maximum allowable output current at the corresponding output voltage;
a sending module 302, configured to send the charging capability information to a wireless charging receiving end WR connected to the WT, where the charging capability information is used to instruct the WR to select a target output voltage from the at least one output voltage according to a load battery voltage and select a charging current for charging based on an output capability corresponding to the target output voltage.
Optionally, the determining module 301 includes:
the first determining submodule is used for determining the charger type of the target charger;
the charger type comprises a high-voltage charger and a conventional voltage charger, wherein the high-voltage charger refers to a charger capable of outputting high voltage and conventional voltage, the conventional voltage charger refers to a charger capable of outputting conventional voltage, and the high voltage is higher than the conventional voltage;
a second determining submodule for determining at least one output voltage that the target charger can output based on the charger type of the target charger;
a third determining submodule for determining a minimum allowed input voltage of the WT;
and the fourth determination submodule is used for determining the output capacity corresponding to each output voltage in the at least one output voltage based on the minimum allowable input voltage.
Optionally, the WT comprises an auxiliary circuit, the auxiliary circuit comprising an auxiliary load; the fourth determination submodule is mainly configured to:
controlling the target charger to output a specified output voltage, wherein the specified output voltage is any one of the at least one output voltage;
loading the output voltage of the target charger to the auxiliary load, and setting the load current of the auxiliary load to be a first preset current;
determining an input voltage of the WT after setting a load current of the auxiliary load to a first preset current;
increasing the load current of the auxiliary load by a second preset current when the input voltage of the WT is greater than or equal to the minimum allowable input voltage, and determining the input voltage of the WT after increasing the load current of the auxiliary load by the second preset current;
when the input voltage of the WT is larger than or equal to the minimum allowable input voltage, increasing the load current of the auxiliary load by a second preset current, and after increasing the load current of the auxiliary load by the second preset current, determining the input voltage of the WT again until the input voltage of the WT is smaller than the minimum allowable input voltage, and determining the output capability corresponding to the specified output voltage according to the load current of the auxiliary load before the load current of the auxiliary load is increased by the second preset current for the last time.
Optionally, the apparatus further comprises:
the receiving module is used for receiving the target output voltage information sent by the WR;
and the control module is used for controlling the target charger to output the target output voltage based on the target output voltage information.
Optionally, the sending module 302 includes:
a fifth determining submodule, configured to determine a WR for establishing a connection with the WT according to a wireless charging alliance WPC protocol;
a transmitting sub-module, configured to transmit the charging capability information to the WR through the WPC protocol.
In the embodiment of the disclosure, the WT may determine charging capability information of a target charger connected to the WT, and send the charging capability information to a WR connected to the WT, where the charging capability information includes at least one output voltage that the target charger can output and a corresponding output capability, and the output capability is used to indicate a maximum allowable output current at the corresponding output voltage, so that, after the WR receives the charging capability information, a target output voltage may be selected from the at least one output voltage according to a load requirement, and a charging current may be selected for charging based on the output capability corresponding to the target output voltage, so as to ensure that the charging current selected by the WR does not exceed the output capability of the target charger at the target output voltage, avoid an overcurrent interruption of the charger, and ensure charging performance of the charger.
It should be noted that: in the over-current protection device provided in the above embodiment, when performing over-current protection, only the division of the functional modules is illustrated, and in practical application, the functions may be distributed by different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the over-current protection device and the over-current protection method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments in detail and are not described herein again.
Figure 4 is a block diagram of a WT400 provided by an embodiment of the present disclosure. Referring to fig. 4, WT400 includes a processing component 410, which further includes one or more processors, and memory resources, represented by memory 420, for storing instructions executable by processing component 410, such as a program for determining charging capability information of a connected target charger, where the program stored in memory 420 may include one or more modules each corresponding to a set of instructions. Additionally, the memory 420 may also store information generated by the processing component 410, such as charging capability information of a target charger. Furthermore, the processing component 410 is configured to execute instructions to implement the over-current protection method provided by the above-described embodiment of fig. 1C or fig. 2.
WT400 may also include a wired or wireless network interface 430, network interface 430 being configured to connect WT400 with a charger or WR. Further, WT400 is also configured with auxiliary circuitry for determining charging capability information of a connected charger.
In another embodiment, a non-transitory computer-readable storage medium is further provided, and the computer-readable storage medium stores instructions that, when executed by a processor, can perform the over-current protection method provided in the embodiment of fig. 1C or fig. 2.
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 (11)
1. An overcurrent protection method, applied to a wireless charging transmitter (WT), wherein the WT includes an auxiliary circuit, and the method comprises:
determining, by the auxiliary circuit, charging capability information of a target charger wired or wirelessly connected to the WT, the charging capability information including a plurality of output voltages that the target charger is capable of outputting and corresponding output capabilities indicating maximum allowable output currents at the corresponding output voltages, and storing the charging capability information locally;
when a WR (wireless charging receiver) wirelessly connected with the WT is detected, the charging capability information stored locally is acquired, and the charging capability information is sent to the WR connected with the WT, wherein the charging capability information is used for indicating the WR to select a target output voltage from the multiple output voltages according to load requirements and select a charging current based on the output capability corresponding to the target output voltage, and the WR selects the charging current which is not more than the maximum output current under the target output voltage and less than the maximum allowable current of a battery of the load;
receiving target output voltage information sent by the WR, wherein the target output voltage information comprises a target output voltage selected by the WR and a selected charging current;
and controlling the target charger to output the target output voltage according to the target output voltage information so as to charge the WR.
2. The method of claim 1, wherein said determining, by said auxiliary circuitry, charging capability information of a target charger connected to said WT comprises:
determining a charger type of the target charger;
the charger types comprise a high-voltage charger and a conventional voltage charger, the high-voltage charger is a charger capable of outputting high voltage and conventional voltage, the conventional voltage charger is a charger capable of outputting conventional voltage, and the high voltage is higher than the conventional voltage;
determining a plurality of output voltages which can be output by the target charger based on the charger type of the target charger;
determining a minimum allowed input voltage of the WT;
based on the minimum allowed input voltage, an output capability is determined for each of the plurality of output voltages.
3. The method of claim 2, wherein the auxiliary circuit comprises an auxiliary load;
the determining an output capability corresponding to each output voltage of the plurality of output voltages based on the minimum allowed input voltage comprises:
controlling the target charger to output a specified output voltage, wherein the specified output voltage is any one of the plurality of output voltages;
loading the output voltage of the target charger on the auxiliary load, and setting the load current of the auxiliary load to be a first preset current;
determining an input voltage of the WT after setting a load current of the auxiliary load to a first preset current;
increasing a load current of the auxiliary load by a second preset current when the input voltage of the WT is greater than or equal to the minimum allowable input voltage, and determining the input voltage of the WT after increasing the load current of the auxiliary load by the second preset current;
when the input voltage of the WT is larger than or equal to the minimum allowable input voltage, the step of increasing the load current of the auxiliary load by a second preset current is executed again, and after the step of increasing the load current of the auxiliary load by the second preset current, the input voltage of the WT is determined, until the load current of the auxiliary load is smaller than the minimum allowable input voltage, the output capability corresponding to the specified output voltage is determined based on the load current of the auxiliary load before the load current of the auxiliary load is increased by the second preset current for the last time.
4. The method of any of claims 1-3, wherein the sending the charging capability information to WRs connected to the WT comprises:
determining a WR to establish a connection with the WT via a Wireless charging alliance (WPC) protocol;
transmitting the charging capability information to the WR through the WPC protocol.
5. The method of claim 2, wherein determining a plurality of output voltages that the target charger can output based on the charger type of the target charger comprises:
determining a plurality of output voltages which can be output by the target charger from voltage information of the plurality of output voltages which can be output by the target charger and carried in the charger type;
or, a plurality of output voltages that can be output by the target charger are determined from a pre-stored correspondence relationship between the charger type and the output voltage, in which a plurality of voltage types and a plurality of output voltages that can be output for each voltage type are stored.
6. An over-current protection device, for use in a wireless charging transmitter (WT), the WT comprising an auxiliary circuit, the device comprising:
a determining module for determining, by the auxiliary circuit, charging capability information of a target charger connected to the WT by wire or wirelessly, the charging capability information including a plurality of output voltages that the target charger is capable of outputting and corresponding output capabilities indicating maximum allowable output currents at the corresponding output voltages, and locally storing the charging capability information;
a sending module, configured to, when a wireless charging receiving end WR wirelessly connected to the WT is detected, obtain the locally stored charging capability information, and send the charging capability information to the WR connected to the WT, where the charging capability information is used to instruct the WR to select a target output voltage from the multiple output voltages according to a load battery voltage and select a charging current based on an output capability corresponding to the target output voltage, and the charging current selected by the WR is not greater than a maximum output current at the target output voltage and is less than a maximum allowable current of a battery of the load;
the device further comprises:
a receiving module, configured to receive target output voltage information sent by the WR, where the target output voltage information includes a target output voltage selected by the WR and a selected charging current;
and the control module is used for controlling the target charger to output the target output voltage according to the target output voltage information so as to charge the WR.
7. The apparatus of claim 6, wherein the determining module comprises:
the first determining submodule is used for determining the charger type of the target charger;
the charger types comprise a high-voltage charger and a conventional voltage charger, the high-voltage charger is a charger capable of outputting high voltage and conventional voltage, the conventional voltage charger is a charger capable of outputting conventional voltage, and the high voltage is higher than the conventional voltage;
a second determining submodule, configured to determine, based on a charger type of the target charger, a plurality of output voltages that the target charger can output;
a third determination submodule for determining a minimum allowed input voltage of the WT;
and the fourth determination submodule is used for determining the output capacity corresponding to each output voltage in the multiple output voltages based on the minimum allowable input voltage.
8. The apparatus of claim 7, wherein the WT comprises an auxiliary circuit, the auxiliary circuit comprising an auxiliary load; the fourth determination submodule is mainly configured to:
controlling the target charger to output a specified output voltage, wherein the specified output voltage is any one of the plurality of output voltages;
loading the output voltage of the target charger on the auxiliary load, and setting the load current of the auxiliary load to be a first preset current;
determining an input voltage of the WT after setting a load current of the auxiliary load to a first preset current;
increasing a load current of the auxiliary load by a second preset current when the input voltage of the WT is greater than or equal to the minimum allowable input voltage, and determining the input voltage of the WT after increasing the load current of the auxiliary load by the second preset current;
when the input voltage of the WT is larger than or equal to the minimum allowable input voltage, the step of increasing the load current of the auxiliary load by a second preset current is executed again, and after the step of increasing the load current of the auxiliary load by the second preset current, the input voltage of the WT is determined, until the load current of the auxiliary load is smaller than the minimum allowable input voltage, the output capability corresponding to the specified output voltage is determined based on the load current of the auxiliary load before the load current of the auxiliary load is increased by the second preset current for the last time.
9. The apparatus of any of claims 6-8, wherein the sending module comprises:
a fifth determining submodule, configured to determine a WR for establishing a connection with the WT through a wireless charging alliance WPC protocol;
and the sending submodule is used for sending the charging capacity information to the WR through the WPC protocol.
10. An overcurrent protection device, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the steps of any of the methods of claims 1-5.
11. A computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of any of the methods of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711116679.0A CN109787303B (en) | 2017-11-13 | 2017-11-13 | Overcurrent protection method, device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711116679.0A CN109787303B (en) | 2017-11-13 | 2017-11-13 | Overcurrent protection method, device and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109787303A CN109787303A (en) | 2019-05-21 |
| CN109787303B true CN109787303B (en) | 2021-06-15 |
Family
ID=66494743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711116679.0A Active CN109787303B (en) | 2017-11-13 | 2017-11-13 | Overcurrent protection method, device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109787303B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790345A (en) * | 2014-12-26 | 2016-07-20 | 中兴通讯股份有限公司 | Charging control method and device |
| CN105826962A (en) * | 2015-07-23 | 2016-08-03 | 维沃移动通信有限公司 | Power control method and device in charging process |
| CN106374567A (en) * | 2016-09-27 | 2017-02-01 | 奇酷互联网络科技（深圳）有限公司 | Terminal equipment, charging method thereof and load capability detection device |
| CN107332590A (en) * | 2017-08-29 | 2017-11-07 | 北京小米移动软件有限公司 | Wireless charging method, transmitting terminal, receiving terminal and power management modules |
-
2017
- 2017-11-13 CN CN201711116679.0A patent/CN109787303B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790345A (en) * | 2014-12-26 | 2016-07-20 | 中兴通讯股份有限公司 | Charging control method and device |
| CN105826962A (en) * | 2015-07-23 | 2016-08-03 | 维沃移动通信有限公司 | Power control method and device in charging process |
| CN106374567A (en) * | 2016-09-27 | 2017-02-01 | 奇酷互联网络科技（深圳）有限公司 | Terminal equipment, charging method thereof and load capability detection device |
| CN107332590A (en) * | 2017-08-29 | 2017-11-07 | 北京小米移动软件有限公司 | Wireless charging method, transmitting terminal, receiving terminal and power management modules |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109787303A (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11368039B2 (en) | Battery charging method and electronic device | |
| US11575280B2 (en) | Electronic device and method for wire and wireless charging in electronic device | |
| US10559985B2 (en) | Wireless power transfer system, control method of wireless power transfer system, wireless power transmitting apparatus, control method of wireless power transmitting apparatus, and storage medium | |
| US9647475B2 (en) | Charger, terminal, charging system, and charging control method | |
| RU2694360C1 (en) | Wireless charging method, transmitter, receiver and power control device | |
| US8324866B2 (en) | Charging system, processor and feeder | |
| EP3206280A1 (en) | System and method for wireless charging of devices | |
| CN114498803A (en) | Charging and discharging circuit and electronic equipment | |
| KR20210043351A (en) | Apparatus and method for charging battery | |
| CN109787303B (en) | Overcurrent protection method, device and storage medium | |
| CN104917227A (en) | Charge control method, charging equipment and terminal equipment | |
| CN111009933B (en) | Mobile terminal and charging control method | |
| JP2014003896A (en) | Charging system and processing unit | |
| US11687138B2 (en) | Power supplying system, electronic apparatus, and power supplying method | |
| EP3291404A1 (en) | Method and device for implementing connection control | |
| CN106899061B (en) | Mobile terminal, charging device and charging method | |
| KR20160042540A (en) | Wireless power receiving apparatus and electronic device having the same | |
| CN112186823B (en) | Wireless charging method, circuit and system | |
| JP7021431B2 (en) | Charging system, charger, and program | |
| JP2018143016A (en) | Power reception device | |
| JP5733042B2 (en) | Femtocell radio base station, communication control method and program | |
| CN107749652B (en) | Overvoltage protection circuit, charging circuit, related method and terminal equipment | |
| CN112653213B (en) | Charging control method and device | |
| KR20210042496A (en) | Controlling method for charging battery of electronic device and electronic device thereof | |
| US20220320902A1 (en) | Apparatus for wireless charging, terminal and charging method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |