CN113258626A

CN113258626A - Wireless charging method and device, charging equipment and storage medium

Info

Publication number: CN113258626A
Application number: CN202010089118.1A
Authority: CN
Inventors: 王彦腾; 孙长宇
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-02-12
Filing date: 2020-02-12
Publication date: 2021-08-13

Abstract

The disclosure relates to a wireless charging method and device, charging equipment and a storage medium. The wireless charging method comprises the following steps: when wireless charging is carried out according to a first protection mechanism, the transmitting power of a wireless charging transmitting terminal is obtained; determining the receiving power of the wireless charging receiving end; determining actual loss according to the transmitting power and the receiving power; and determining the charging power of the wireless charging according to the power interval corresponding to the actual loss.

Description

Wireless charging method and device, charging equipment and storage medium

Technical Field

The present disclosure relates to the field of display touch technologies, but not limited to the field of wireless communication technologies, and in particular, to a wireless charging method and apparatus, a charging device, and a storage medium.

Background

With the efforts of wireless charging technology vendors and coil vendors, more and more smart devices, including many wearable devices and mobile smart terminals, start to apply wireless charging technology. In terms of the market, the Wireless Power Consortium (WPC) has been widely used.

In the wireless charging process, protection of wireless charging is required, for example, damage of charging equipment caused by an overcurrent phenomenon is reduced through protection of wireless charging, or charging is stopped in time when loss of wireless charging is too large, and phenomena of ineffective charging or too low charging efficiency are reduced.

However, in the related art, various protection mechanisms for wireless charging have the phenomenon that the protection mechanism and the charging efficiency are still low.

Disclosure of Invention

The disclosure provides a wireless charging method and device, charging equipment and a storage medium.

A first aspect of the embodiments of the present application provides a wireless charging method, which is applied to a wireless charging receiving end, and the method includes:

when wireless charging is carried out according to a first protection mechanism, the transmitting power of a wireless charging transmitting terminal is obtained;

determining the receiving power of the wireless charging receiving end;

determining actual loss according to the transmitting power and the receiving power;

and determining the charging power of the wireless charging according to the power interval corresponding to the actual loss.

Based on the above scheme, the determining the charging power for wireless charging according to the power interval corresponding to the actual loss includes:

determining whether the actual loss corresponds to a power interval in which the current charging power is located according to the actual loss and a target loss of the power interval in which the current charging power is located;

and if the actual loss does not correspond to the power interval where the current charging power is located, adjusting the current charging power.

Based on the above scheme, if the actual loss does not correspond to the power interval in which the current charging power is located, adjusting the current charging power includes:

and if the actual loss does not correspond to the power interval of the current charging power and is greater than the target loss of the power interval of the current charging power, reducing the current charging power.

Based on the above scheme, the method further comprises:

if the power interval corresponding to the actual loss is not the power interval corresponding to the charging power before re-determination, outputting prompt information of the wireless charging receiving terminal and/or the wireless charging transmitting terminal before re-determination of the current charging power;

if the actual loss does not correspond to the power interval in which the current charging power is located, adjusting the current charging power includes:

and after the prompt information is output for a preset time, if the power interval corresponding to the actual loss is still not the power interval corresponding to the charging power before re-determination, adjusting the current charging power.

Based on the above scheme, the method further comprises:

before the wireless charging is carried out, interacting verification information whether the first type of charging protocol charging is supported with the wireless charging sending terminal;

when the verification information passes verification, determining to perform wireless charging according to a first type of charging protocol;

and when the first type of charging protocol is adopted for wireless charging, wireless charging protection is carried out according to the first protection mechanism.

Based on the above scheme, the method further comprises:

when the verification information is not verified, performing wireless charging between the wireless charging sending end and the wireless charging receiving end according to a second type of charging protocol;

and when the second type of charging protocol is adopted for wireless charging, wireless charging protection is carried out according to a second protection mechanism different from the first protection mechanism.

Based on the above scheme, the first type of charging protocol includes: a proprietary charging protocol or an extended power specification EPP protocol.

A second aspect of the present application provides a wireless charging method, which is applied to a wireless charging transmitting terminal, and the method includes:

sending the charging information of the wireless charging sending terminal to a wireless charging receiving terminal; the charging information includes: transmitting power or calculating a charging signal value of the transmitting power, wherein the charging signal value is used for determining actual loss by combining the wireless charging receiving end with the received power;

and the wireless charging receiving end determines charging power again based on the power interval corresponding to the actual loss.

Based on the above scheme, the charging signal value includes: the input current value and the input voltage value of an inverter in the wireless charging sending terminal;

the method further comprises the following steps:

and acquiring the input current value and the input voltage value.

A third aspect of the present embodiment provides a wireless charging device, which is applied to a wireless charging receiving end, where the method includes:

the first acquisition module is used for acquiring the transmitting power of the wireless charging transmitting terminal when wireless charging is carried out according to a first protection mechanism;

the first determining module is used for determining the receiving power of the wireless charging receiving end;

a second determining module, configured to determine an actual loss according to the transmit power and the receive power;

and the third determining module is used for determining the charging power of the wireless charging according to the power interval corresponding to the actual loss.

Based on the above scheme, the third determining module is configured to determine whether the actual loss corresponds to a power interval in which the current charging power is located according to the actual loss and a target loss in the power interval in which the current charging power is located; and if the actual loss does not correspond to the power interval where the current charging power is located, adjusting the current charging power.

Based on the above scheme, the third determining module is configured to reduce the current charging power if the actual loss does not correspond to the power interval in which the current charging power is located, and the actual loss is greater than the target loss in the power interval in which the current charging power is located.

Based on the above scheme, the apparatus further comprises:

a prompt module, configured to output a prompt message of the wireless charging receiving end and/or the wireless charging transmitting end before re-determining the current charging power if the power interval corresponding to the actual loss is not the power interval corresponding to the charging power before re-determining;

the third determining module is specifically configured to, after the prompt information is output for a predetermined time period, adjust the current charging power if the power interval corresponding to the actual loss is still not the power interval corresponding to the charging power before re-determination.

Based on the above scheme, the method further includes:

the verification module is used for interacting verification information whether the first type of charging protocol is supported for charging with the wireless charging sending end before the wireless charging is carried out;

the fourth determining module is used for determining to carry out wireless charging according to the first type of charging protocol when the verification information passes verification;

and the first protection module is used for performing wireless charging protection according to the first protection mechanism when the first type of charging protocol is adopted for wireless charging.

Based on the above scheme, the apparatus further comprises:

the charging module is used for carrying out wireless charging between the wireless charging sending end and the wireless charging receiving end according to a second type of charging protocol when the verification information is not verified;

and the second protection module is used for performing wireless charging protection according to a second protection mechanism different from the first protection mechanism when the second type of charging protocol is adopted for wireless charging.

A third aspect of the present embodiment provides a wireless charging apparatus, which is applied to a wireless charging sending end, where the method includes:

the sending module is used for sending the charging information of the wireless charging sending end to a wireless charging receiving end; the charging information includes: transmitting power or calculating a charging signal value of the transmitting power, wherein the charging signal value is used for determining actual loss by combining the wireless charging receiving end with the received power;

and the fifth determining module is used for re-determining the charging power with the wireless charging receiving end based on the power interval corresponding to the actual loss.

the device further comprises:

and the second acquisition module is used for acquiring the input current value and the input voltage value.

A fifth aspect of the embodiments of the present application provides a charging apparatus, including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to implement the wireless charging method provided in any embodiment of the first aspect or the second aspect by executing the executable instructions.

A sixth aspect of embodiments of the present application provides a computer storage medium having executable instructions stored thereon; the executable instructions can be executed by a processor to implement the wireless charging method provided by any embodiment of the first aspect or the second aspect.

According to the wireless charging method provided by the embodiment of the application, when the first protection mechanism is adopted for protection of wireless charging, the transmitting power of a wireless charging transmitting terminal and the receiving power of a wireless charging receiving terminal are determined, then the actual loss of wireless charging is obtained, and whether the charging efficiency needs to be determined again or not is determined according to the power interval corresponding to the actual loss. By adopting the protection mechanism to carry out wireless charging protection, the charging power can be timely re-determined when the actual loss is overlarge, so that overcurrent protection and heating protection are realized; when the actual loss is small, the charging power can be re-determined in time, and the charging efficiency is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a flow chart illustrating a wireless charging method according to an example embodiment.

Fig. 2 is a flow chart illustrating a wireless charging method according to an example embodiment.

Fig. 3 is a flow chart illustrating a wireless charging method according to an example embodiment.

Fig. 4 is a schematic structural diagram of a wireless charging device according to an exemplary embodiment.

Fig. 5 is a schematic structural diagram of a wireless charging device according to an exemplary embodiment.

Fig. 6 is a schematic diagram illustrating a structure of a terminal including a wireless charging receiving end according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

As shown in fig. 1, the present embodiment provides a wireless charging method applied in a wireless charging receiving end, the method including:

s11: when wireless charging is carried out according to a first protection mechanism, the transmitting power of a wireless charging transmitting terminal is obtained;

s12: determining the receiving power of the wireless charging receiving end;

s13: determining actual loss according to the transmitting power and the receiving power, namely determining actual power loss;

s14: and determining the charging power of the wireless charging according to the power interval corresponding to the actual loss.

The wireless charging method provided by the embodiment of the application can be applied to a wireless charging receiving end comprising a wireless charging receiver. The wireless charging receiving end includes but is not limited to: the mobile terminal such as a mobile phone, a tablet computer or a wearable device can also be other fixed devices capable of receiving wireless charging.

In some embodiments, when the wireless charging is performed according to the first protection mechanism, the transmission power of the wireless charging transmitting terminal is directly received, or the charging current and the charging voltage transmitted by the wireless charger are received. For example, the wireless charging receiving end receives the transmission power using in-band communication, or receives the transmission power through out-of-band communication. And the wireless charging receiving end adopts in-band communication to receive and calculate the charging voltage and the charging current of the transmitting power, or receives and calculates the charging current or the charging voltage of the transmitting power through out-of-band communication.

For example, when in-band communication is used, the charging signal and the information signal for wireless charging use the same carrier. When out-of-band communication is adopted, different carriers are adopted for the charging signal of the wireless charger and the information signal of the transmitting power. The information signal here may be: a signal of the transmitted power, or a signal of the charging current and the charging voltage.

In the embodiment of the present application, the wireless charging receiving terminal determines its own receiving power. After receiving the charging signal of the wireless charging, the wireless charging receiving end converts the alternating current charging signal into a direct current signal; and determining the receiving power of the wireless charging receiving end according to the current value and the voltage value of the direct current signal.

Once the transmit power and receive power are known, the transmit power can be subtracted from the receive power, and the resulting difference is the actual loss.

Different losses correspond to different power intervals. One power interval includes: an upper power limit and a lower power limit. The lower power limit is less than the upper power limit. One power interval corresponds to one loss value or one loss interval. One loss interval includes: an upper loss limit and a lower loss limit.

And if the power interval corresponding to the actual loss is the power interval, determining the charging power of the wireless charging.

For example, if the power interval corresponding to the actual loss is not the power interval corresponding to the current charging power, the charging power for wireless charging is used, and the wireless charging is re-determined. The re-determination of wireless charging here may include: the present charging power is reduced or increased according to the actual loss, thereby achieving a charging efficiency that is ensured and a possible reduced risk of overcurrent. If in some embodiments, if the current charging power is determined again, the determined charging power is sent to the wireless charging transmitting terminal; or, if the current charging power is determined again, the indication information of the power interval corresponding to the determined charging power is sent to the wireless charging transmitting terminal. After receiving the re-determined charging power or the indication information of the power interval corresponding to the current charging power determined by charging, the wireless charging transmitting terminal adjusts its own transmitting power. Through the adjustment of the transmitting power, the charging damage of the charging equipment caused by overcurrent is reduced; or, charging efficiency is improved.

The charging device includes, but is not limited to, the wireless charging transmitting terminal and the wireless charging receiving terminal.

For another example, if the power interval corresponding to the actual loss is the power interval corresponding to the current charging power, the current charging power of the wireless charging is maintained.

The power intervals are divided by the same power step; alternatively, the plurality of power intervals are divided into different power intervals.

In some embodiments, the power step may be determined according to the maximum charging power supported by the wireless charging protocol, and the power interval may be divided.

For example, the maximum charging power supported by the private charging protocol is 30W, and if the power step size is 5W, the power intervals may be as follows: 5W-10W, 10W-15W, 15W-20W, 20W-25W and 25W-30W.

For another example, the maximum charging power supported by the EPP protocol is 15W, and if the power step is 4W, the power intervals may be as follows: 5W-9W, 9W-13W and 13W-15W. If the power step is 5W, the power intervals may be as follows: 5W-10W and 10W-15W.

In some embodiments, as shown in fig. 2, the S14 may include:

s141: determining whether the actual loss corresponds to a power interval in which the current charging power is located according to the actual loss and a target loss of the power interval in which the current charging power is located;

s142: and if the actual loss does not correspond to the power interval where the current charging power is located, adjusting the current charging power.

For example, the current charging power is between the power interval 25W-30W, the charging interval of 25W-30W sets the loss interval, or sets the maximum loss value. Here, the loss section or the maximum loss value is an example of the above-mentioned target loss.

For example, if the actual loss is greater than the maximum loss value in the target loss, it may be considered that the actual loss does not correspond to the target loss in the power interval where the current charging power is located; otherwise, the actual loss is considered to correspond to the power interval in which the current low charging power exists.

For another example, if the actual loss is outside the loss interval corresponding to the interval where the current charging power is located, it is determined that the actual loss does not correspond to the power interval where the current charging power is located; otherwise, the actual calculation is considered to correspond to the power range in which the current charging power is located.

In some embodiments, the S142 may include:

and if the actual loss does not correspond to the power interval of the current charging power and is greater than the target loss of the power interval of the current charging power, reducing the current charging power. So as to ensure that the power loss is below the target loss corresponding to the current power difference in the power interval where the different charging powers are located.

And when the actual loss does not correspond to the power interval of the current charging power, if the target loss is the maximum loss, the actual loss is larger than the target loss of the power interval of the current charging power cable, and the current charging power is automatically reduced.

For example, each power interval is sorted from large to small according to the charging power corresponding to the power interval, and the charging power corresponding to the next power interval can be automatically switched when the current charging function is reduced.

For another example, the impedance of the wireless charging is estimated according to the current actual loss, and the charging power suitable for the current impedance is calculated according to the impedance and the charging power corresponding to each power interval.

For another example, if the actual loss does not correspond to the power interval in which the previous charging power is located, and the actual loss is smaller than the minimum loss of the power interval in which the current charging power is located, the current charging power is increased to improve the charging efficiency. And when the current charging power is increased, the power corresponding to the previous power interval can be increased. Or calculating the current charging impedance according to the actual loss, and estimating the charging power which is properly boosted according to the impedance.

In summary, in the embodiment of the present application, there are various ways to determine the charging power again, and the determination is not limited to any one. In some embodiments, the method further comprises:

and if the power interval corresponding to the actual loss is not the power interval corresponding to the charging power before re-determination, outputting prompt information of the wireless charging receiving terminal and/or the wireless charging transmitting terminal before re-determination of the current charging power. The S142 may include: and after the prompt information is output for a preset time, if the power interval corresponding to the actual loss is still not the power interval corresponding to the charging power before re-determination, adjusting the current charging power.

The actual loss may be due to the attitude of the charging device not being correct during charging. In order to ensure the charging rate, in the embodiment of the present application, a prompt message may be output before the current charging power is re-determined. For example, prompt information in a text and/or image format is displayed on a display screen of the wireless charging receiving end. After seeing the prompt message, the user can adjust at least one of the wireless charging sending end and the wireless charging receiving end, and therefore charging efficiency is improved.

For example, the charging efficiency can be improved by the distance between the wireless charging transmitting terminal and the wireless charging receiving terminal or the relative orientation between the wireless charging transmitting terminal and the wireless charging receiving terminal.

Of course, in other embodiments, the prompt message may be a voice message or a light signal. Therefore, after the user sees the prompt message, the position and/or posture of at least one of the wireless charging sending end and the wireless charging receiving end can be manually adjusted, so that the charging efficiency is improved while the charging rate is ensured.

For example, WPC-based wireless charging techniques require that the receive and transmit coils be aligned for best efficiency. When the receiving coil and the transmitting coil are deviated, wireless charging efficiency may be reduced. In general, wireless charging can be performed with the degree of freedom of wireless charging within 15mm of the X direction or the Y direction, and the efficiency is drastically reduced with the displacement of the coil, for example, the efficiency is reduced by about 10% when the coil is displaced by 10 mm. The receiving coil is located in the wireless charging receiving end. The transmitting coil is located in the wireless charging transmitting end. The transmitting coil is used for transmitting a charging signal for wireless charging, and the receiving coil is used for receiving the charging signal for wireless charging in a wireless mode.

In 30W wireless charging, if the efficiency when the coil centers are aligned is 86%, the transmitting power of a transmitting end is 35W; when the offset is 10mm, in order to maintain the wireless charging of the receiving end 30W, the transmitting power of the transmitting end is 40W (for example, the efficiency is reduced to 76%), there will be a loss of up to 10W, so that the charging is heated rapidly. So, through the output of prompt message, if the relative position between wireless transmitting terminal and the wireless receiving terminal that charges in time obtains the adjustment, can reduce the phenomenon of generating heat sharply that the actual loss is too big to lead to on the one hand, on the other hand promotes charge efficiency.

The preset time period may be a preset time period such as 5 minutes or 3 minutes. The preset time length is the time length which can not cause the damage of the wireless charging transmitting terminal and the wireless charging receiving terminal even if the actual loss is overlarge.

In some embodiments, the method further comprises:

Before carrying out wireless charging, wireless charging receiving terminal need with wireless charging transmit terminal between mutual charging information, this charging information includes: wireless charging protocols supported by both parties. The charging parameters corresponding to different wireless charging protocols are different. The charging parameters include: charging current, charging voltage and/or charging power, etc.

In this embodiment, the charging information may further include: the aforementioned authentication information. The authentication information herein includes, but is not limited to, authentication information whether a specific charging protocol is supported. For example, the authentication information may be authentication information whether the first type of charging protocol is supported.

The first type of charging protocol may be various high power charging protocols, for example, a proprietary charging protocol supporting 30W, or an EPP protocol supporting 15W. The EPP protocol is a standard charging protocol and is different from the proprietary charging protocol.

Different charging protocols may correspond to different authentication information.

After the verification information of the first type of charging protocol passes, the wireless charging receiving terminal and the wireless charging transmitting terminal can be considered to support the first type of charging protocol. If the first type charging protocol is supported, in order to ensure a sufficiently high charging rate, the first type charging protocol is used for charging.

In the embodiment of the application, the type information can be used as verification information according to the device types of the wireless charging sending end and the wireless charging receiving end, and whether the wireless charging sending end and the wireless charging receiving end both support the first type of charging protocol or not is determined.

For example, when the device type of the wireless charging transmitting end is:

when the types of the general DCP charger, the Quick Charge (QC) 2.0 charger, the QC3.0 charger, the QC4.0 charger, the PD charger, etc., the wireless charging transmitting end can be considered to support the first type of charging protocol. DCP is an abbreviation for Downstream Charge Port.

If the first type of charging protocol is used for wireless charging, the first protection mechanism in the embodiment of the application is used for protecting the wireless charging.

Of course, in other embodiments, a second type of charging protocol other than the first type of charging protocol may also use the first protection mechanism for charging protection.

In some embodiments, when the first protection mechanism is used for wireless charging protection, the transmission power of the wireless charging transmitting terminal is periodically acquired, so that the current wireless charging power is periodically determined.

In other embodiments, when the first protection mechanism is used for wireless charging protection, the transmitting power of the wireless charging transmitting terminal can be obtained in real time, so that the current wireless charging power is determined in real time, and the real-time protection of wireless charging is realized.

In some embodiments, the method further comprises:

The second type of charging protocol includes, but is not limited to, Basic Power Profile (BPP) charging. The charging parameters corresponding to the BPP protocol include: a charging power of less than or equal to 5W.

For example, the first type of charging protocol includes: proprietary charging protocol or Extended Power Profile (EPP) protocol.

The first type of charging protocol and the second type of charging protocol may be dynamically partitioned, for example, in some cases, the EPP protocol may also be considered as the second type of charging protocol.

The second protection mechanism may be any one of:

a maximum power protection mechanism or an Over Current Protection (OCP) mechanism. When the transmission power of the transmitting end exceeds the maximum power limit or the current (input current, coil current, etc.) of the transmitting end is greater than a certain threshold, the transmitting end stops wireless charging.

Protection mechanism based on coil temperature: the sending end detects the temperature of the sending coil, and when the temperature exceeds a certain threshold value, wireless charging is stopped or wireless charging power is reduced.

Protection mechanism based on charging efficiency: the sending end calculates the efficiency according to the current sending power and the current receiving power, and when the charging efficiency is lower than a certain threshold value, the wireless charging is stopped or the wireless charging power is reduced.

As shown in fig. 3, this embodiment provides a wireless charging method applied to a wireless charging transmitting end, where the method includes:

s21: sending the charging information of the wireless charging sending terminal to a wireless charging receiving terminal; the charging information includes: transmitting power or calculating a charging signal value of the transmitting power, wherein the charging signal value is used for determining actual loss by combining the wireless charging receiving end with the received power;

s22: and the wireless charging receiving end determines charging power again based on the power interval corresponding to the actual loss.

The wireless charging method provided in the embodiment of the application is applied to a wireless charging sending end. The wireless charging transmitting terminal includes, but is not limited to, a wireless charger.

The charging information includes: the transmitting power or the charging signal value of the wireless charging transmitting terminal. The charging signal value can be used for the wireless power supply receiving end to calculate the transmitting power. For example, the charging signal values include: the voltage value and the current value of the charge.

In the embodiment of the application, the wireless charging receiving terminal calculates the actual loss according to the charging information of the wireless charging terminal. Then, by adopting the method shown in fig. 1, when the actual loss of the wireless charging does not correspond to the power interval where the current charging power is located, the current charging power is negotiated with the wireless charging transmitting terminal to be determined again, and on one hand, when the actual loss is too large, the current charging power is reduced, so that the overcurrent phenomenon or the coil overheating phenomenon is reduced; on the other hand, when the actual loss is too large, the charging efficiency can be improved by reducing the current charging power, and unnecessary energy consumption is reduced.

For example, the charging information is transmitted to the wireless charging receiving terminal by in-band communication, or the charging information is transmitted to the wireless charging receiving terminal by out-of-band communication.

In some embodiments, the charge signal values include: the input current value and the input voltage value of an inverter in the wireless charging sending terminal;

the method further comprises the following steps:

and acquiring the input current value and the input voltage value.

The current input to the inverter is a direct current, and the input current value and the input voltage value input to the inverter can be detected by a sampling resistor or the like.

After the input current value and the input voltage value are obtained, the transmitting power can be obtained by calculating the multiplier of the input current value and the input voltage value.

In some embodiments, the transmit power may be calculated by the wireless charging transmitting end, and in other embodiments, the transmit power may be calculated by the wireless charging receiving end.

In some embodiments, the method further comprises:

before the wireless charging is carried out, verification information is interacted with the wireless charging receiving end, and the verification information is used for verifying whether the wireless charging receiving end and the wireless charging sending end both support the first type of charging protocol.

If the first type of charging protocol is supported, the wireless charging sending end sends the charging information to the wireless charging receiving end periodically or in real time.

As shown in fig. 4, the present embodiment provides a wireless charging apparatus applied in a wireless charging receiving end, the method includes:

a first obtaining module 41, configured to obtain the transmit power of the wireless charging transmitting terminal when performing wireless charging according to a first protection mechanism;

a first determining module 42, configured to determine the received power of the wireless charging receiving end;

a second determining module 43, configured to determine an actual loss according to the transmit power and the receive power;

and a third determining module 43, configured to determine the charging power of the wireless charging according to the power interval corresponding to the actual loss.

In some embodiments, the first obtaining module 41, the first determining module 42, the second determining module 43, and the third determining module 43 may all be program modules; the program modules are capable of performing the operations described above when executed by a processor.

In some embodiments, the first obtaining module 41, the first determining module 42, the second determining module 43, and the third determining module 43 may all be soft and hard combining modules; the soft and hard combining module includes but is not limited to various programmable arrays. The programmable array includes, but is not limited to, a complex programmable array or a field programmable array.

In still other embodiments, the first obtaining module 41, the first determining module 42, the second determining module 43, and the third determining module 43 may all be pure hardware modules; including but not limited to application specific integrated circuits.

In some embodiments, the third determining module 43 is configured to determine whether the actual loss corresponds to a power interval in which the current charging power is located according to the actual loss and a target loss in the power interval in which the current charging power is located; and if the actual loss does not correspond to the power interval where the current charging power is located, adjusting the current charging power.

In some embodiments, the third determining module 43 is configured to reduce the current charging power if the actual loss does not correspond to a power interval in which the current charging power is located, and the actual loss is greater than the target loss in the power interval in which the current charging power is located.

In some embodiments, the apparatus further comprises:

the third determining module 43 is specifically configured to, after the prompt information is output for a predetermined time period, adjust the current charging power if the power interval corresponding to the actual loss is still not the power interval corresponding to the charging power before re-determination.

In some embodiments, the method apparatus further comprises:

In some embodiments, the apparatus further comprises:

In some embodiments, the first type of charging protocol comprises: a proprietary charging protocol or an extended power specification EPP protocol.

As shown in fig. 5, this embodiment provides a wireless charging apparatus, which is applied to a wireless charging transmitting end, and the method includes:

a sending module 51, configured to send the charging information of the wireless charging sending end to a wireless charging receiving end; the charging information includes: transmitting power or calculating a charging signal value of the transmitting power, wherein the charging signal value is used for determining actual loss by combining the wireless charging receiving end with the received power;

a fifth determining module 52, configured to re-determine, with the wireless charging receiving end, charging power based on the power interval corresponding to the actual loss.

In some embodiments, the sending module 51 and the fifth determining module 52 may both be program modules; the program modules are capable of performing the operations described above when executed by a processor.

In some embodiments, the first obtaining module, the first determining module, the second determining module and the third determining module may all be a hardware-software combining module; the soft and hard combining module includes but is not limited to various programmable arrays. The programmable array includes, but is not limited to, a complex programmable array or a field programmable array.

In some further embodiments, the first obtaining module, the first determining module, the second determining module, and the third determining module may all be pure hardware modules; including but not limited to application specific integrated circuits.

In some embodiments, the charging signal values comprise: the input current value and the input voltage value of the inverter in the wireless charger. The device further comprises: and the acquisition module is used for acquiring the input current and the input voltage of the inverter in the wireless charging transmitting terminal.

Two examples are provided below in connection with any of the embodiments described above:

example 1:

the present example provides a protection mechanism and a method for a wireless charging receiving end, where the receiving end actively reduces load power according to efficiency loss, that is, a transmitting end transmits its own transmit power to the receiving end through Frequency-shift keying (FSK) information or out-of-band communication technology at intervals. The receiving terminal calculates the power loss according to the receiving power at the last moment, and when the power loss is higher than a certain threshold value, the load power of the receiving terminal is actively reduced, so that the wireless charging is safer, and the heating during charging is avoided. The FSK information is obtained FSK information using FSK modulation of transmission power or charging information.

Example 2:

the present example provides a protection mechanism and a method for a wireless charging receiving end, and the method is applicable to a high-power wireless charging transmitting end and a high-power wireless charging receiving end of a private protocol.

The specific method comprises the following steps:

the wireless transmitting end is connected with the charger, and the transmitting end completes detection of the type of the charger. The charger types are common DCP chargers, QC2.0 chargers, QC3.0 chargers, QC4.0 chargers, Power Digital (PD) chargers and the like. The wireless receiving end is placed on the wireless transmitting end, the receiving end and the wireless transmitting end firstly use the in-band communication protocol of Qi specification for interaction, and the wireless transmitting end supports the BPP (5W) protocol and the EPP (15W) protocol of the Qi specification.

And the receiving end and the sending end carry out rapid wireless charging authentication, namely the receiving end carries out authorization verification on the sending end.

If the verification is passed, the transmitting end and the receiving end adopt a private protocol to carry out wireless charging, and the charging power can reach 30W.

Through the in-band proprietary protocol and command (or out-of-band protocol and command), the receiving end can obtain the voltage and current information of the sending equipment in real time, and the transmitting power P of the sending end is calculated_{Tx_in}。

P_{Tx_in}＝V_Tx*I_TxWherein V is_TxThe input voltage value of an inverter in a wireless charging sending terminal is sent; i is_TxAnd transmitting the input current value of the inverter in the terminal for wireless charging.

The receiving end calculates the current received power p_{Rx_out}。

p_{Rx_out}＝V_Rx*I_RxWherein V is_RxCharging the voltage value of a receiving end for wireless charging; i is_TxAnd the current value in the receiving end is charged wirelessly.

According to the power required by the receiving end, for example, different power intervals such as 5W-10W, 10W-15W, 15W-20W, 20W-25W, 25W-30W and the like, different target power loss P is set for each power interval_{loss_leve_i}Such as P_{loss_leve_1}Representing the target loss for the 5-10W power interval.

The formula for actually calculating the power loss is: p_loss＝P_{Tx_in}-P_{Rx_out}Wherein P is_lossIs a real loss.

Under the condition of the current coil positions of the receiving end and the transmitting end, the receiving end calculates P in real time_lossValue if P_loss<P_{loss_leve_i}If yes, maintaining normal wireless charging;

if the current P is_loss>P_{loss_leve_i}Then, the receiving end may give a UI prompt: the coil positions are not aligned, and manual alignment is needed; if the receiver is within a time T1 and the coil positions are not aligned or within a certain offset range, the receiver actively performs power down. I.e. the current maximum charging power P allowed by the receiving end_{Rx_out}＝P_{Tx_in}-P_lossThe receiving end will reset the charging power.

In the whole wireless charging process, the receiving end carries out real-time power loss calculation, and the receiving end actively adjusts the power output of the receiving end, so that the power loss is below the target loss in different charging power level intervals.

If the verification fails, charging by adopting a BPP or EPP protocol of Qi specification, wherein the sending end supports the EPP and the BPP protocol, and if the receiving end supports the EPP protocol, performing EPP negotiation power charging (15W); if the receiving end only supports the BPP protocol, charging based on BPP power (5W) is carried out. Through the intelligent charging control method of the receiving end, the wireless charging is ensured to be safer, and the heating during charging is avoided.

Example 3:

the present example provides a protection mechanism and a method for a wireless charging transmitter, which are different from the current protection method for a transmitter, and are based on a protection mechanism of actual power loss (power loss), different power intervals are set according to different power requirements of a receiver, such as 5W-10W, 10W-15W, 15W-20W, 20W-25W, 25W-30W, and different power loss targets P are set for each power interval_{loss_leve_i}(ii) a According to the current power interval and the power loss target, the transmitting end informs the receiving end of the mode of actively reducing the power or the transmitting end actively reduces the power, so that the power loss in the current power interval is ensured to be within the target range, and abnormal heating of charging is avoided. The method is suitable for a high-power wireless charging transmitting terminal and a high-power wireless charging receiving terminal of a private protocol, and is also suitable for a wireless charging transmitting terminal and a wireless charging receiving terminal of common standard Qi BPP and EPP protocols, so that the wireless transmitting terminal is ensured to be safer, and charging heating is avoided.

Example 4:

the present example provides a protection mechanism and method for a wireless charging transmitter, and the method is applicable to a high-power wireless charging transmitter and receiver of a private protocol, and also applicable to a wireless charging transmitter and receiver of common standard Qi BPP and EPP protocols.

The specific method comprises the following steps:

the wireless transmitting end is connected with the charger, and the transmitting end completes detection of the type of the charger. The charger types are common DCP charger, QC2.0 charger, QC3.0 charger, QC4.0 charger, PD charger and the like.

The wireless receiving end is placed on the wireless transmitting end, the receiving end and the wireless transmitting end firstly use the in-band communication protocol of Qi specification for interaction, and the wireless transmitting end supports the BPP (5W) protocol and the EPP (15W) protocol of the Qi specification.

If the verification is passed, the transmitting end and the receiving end adopt a private protocol to carry out wireless charging, and the charging power can reach 30W. Through the in-band proprietary protocol and the command, the sending end can obtain the voltage and current information of the receiving end in real time and calculate the transmitting power p of the receiving end_{RX_out}。

p_{Rx_out}＝V_Rx*I_Rx

The sending end calculates the current transmitting power P_{Tx_in}。

p_{Tx_in}＝V_Tx*I_Tx

According to the power required by the receiving end, for example, different power intervals such as 5W-10W, 10W-15W, 15W-20W, 20W-25W, 25W-30W and the like, different power loss targets P are set for each power interval_{loss_leve_i}Such as P_{loss_leve_1}Representing the target loss for the 5-10W power interval.

The formula for actually calculating the power loss is: p_loss＝P_{Tx_in}-P_{Rx_out}

Under the condition of the current coil positions of the receiving end and the transmitting end, the transmitting end calculates P in real time_lossValue if P_loss<P_{loss_leve_i}If yes, maintaining normal wireless charging; if the current P is_loss>P_{loss_leve_i}Then, the sending end notifies the receiving end through the in-band private protocol, for example, gives a UI prompt: the coil positions are not aligned, and manual alignment is needed; if the coil position is not aligned or within a certain offset range within a period of time T1, the transmitting end informs the receiving end to reduce power through the in-band proprietary protocol. I.e. informing the receiving end of the current maximum charging power P allowed_{Rx_out}＝P_{Tx_in}-P_lossAnd when the receiving end receives the power reduction information, the charging power is reset. In the whole wireless charging process, the transmitting end and the receiving end perform real-time power loss calculation to adjust the power output of the receiving end, and the power loss is ensured to be below the target loss in different charging power level intervals.

If the verification fails, charging by adopting a BPP or EPP protocol of Qi specification, wherein the sending end supports the EPP and the BPP protocol, and if the receiving end supports the EPP protocol, performing EPP negotiation power charging (15W); if the receiving end only supports the BPP protocol, BPP (< ═ 5W) power charging is carried out.

If the EPP receiving end is used, the transmitting end respectively sets the allowed maximum transmitting end power P according to two intervals of 5W-10W and 10W-15W_{Tx_max_10W}And P_{Tx_max_15W}。

If the power interval of the current receiving end is within, for example, the receiving end and the sending device negotiate a power load of 10W; the transmitting end monitors the transmitting power P of the transmitting end in real time_TxWhen P is_Tx<P_{Tx_max_10W}And when the current wireless charging power is not available, the current wireless charging power is maintained. When P is present_Tx>＝P_{Tx_max_10W}Then, the current power of the transmitting end is maintained to be P_{Tx_max_10W}The receiving end continues to send and Control Error Packets (CEPs). The CEP is power adjustment information sent by the receiving end to the sending end, a positive value represents an increasing power, and a negative value represents a decreasing power. The transmitting end will not respond to the CEP request of the receiving end, i.e., maintain the current transmitting end power.

If the received signal is BPP receiving end, the transmitting end sets allowable maximum transmitting end power P_{Tx_max_5W}. Transmitting end real-time monitoring transmitting power P_TxWhen P is_Tx<P_{Tx_max_5W}And when the current wireless charging power is not available, the current wireless charging power is maintained. When P is present_Tx>＝P_{Tx_max_5W}Then, the current power of the transmitting end is maintained to be P_{Tx_max_5W}When the receiving end continues to transmit and CEP, the transmitting end will not respond to the CEP request of the receiving end, i.e. maintain the current transmitting end power. By the intelligent charging control method of the transmitting end, the wireless transmitting end is ensured to be safer, and charging and heating are avoided.

An embodiment of the present application provides a charging apparatus, including:

a transceiver;

a processor;

a memory for storing processor-executable instructions;

the processor is configured to execute the executable instructions to implement the wireless charging method provided in any of the foregoing technical solutions, for example, the wireless charging method applied to the wireless charging receiving end or the wireless charging method applied to the wireless charging transmitting end can be implemented.

The processor may be capable of implementing the wireless charging methods illustrated in fig. 1, 2, and/or 3 by executing various executable instructions, such as source code or object code.

The transceiver may be a transmit coil or a receive coil.

The embodiment of the application provides a computer storage medium, wherein executable instructions are stored in the computer storage medium; after the executable instruction is executed by the processor, the wireless charging method provided by any technical scheme can be realized.

Fig. 6 is a block diagram illustrating a terminal 800 including a wireless charging receiving end according to an example embodiment. For example, the terminal 800 including the wireless charging receiving terminal may be a mobile phone, a computer, a digital broadcasting charging device, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 6, a terminal 800 including a wireless charging receiving end may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls the overall operation of the terminal 800 including the wireless charging reception end, such as operations associated with display, phone call, data communication, camera operation, and recording operation. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operation at the device 800. Examples of such data include instructions for any application or method operating on the terminal 800 containing the wireless charging recipient, contact data, phonebook data, messages, pictures, videos, and the like. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power component 806 provides power to various components of the terminal 800 including the wireless charging receiver. The power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the terminal 800 including the wireless charging receiver.

The multimedia component 808 includes a screen providing an output interface between the terminal 800 including the wireless charging receiving terminal and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio module 810 includes a Microphone (MIC) configured to receive an external audio signal when the terminal 800 including the wireless charging reception terminal is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of state estimation for the terminal 800 including a wireless charging receiver. For example, the sensor assembly 814 may detect the on/off status of the device 800, the relative positioning of the components, such as the display and keypad of the terminal 800 including the wireless charging receiver, the sensor assembly 814 may detect a change in the position of the terminal 800 including the wireless charging receiver or a component of the terminal 800 including the wireless charging receiver, the presence or absence of user contact with the terminal 800 including the wireless charging receiver, the orientation or acceleration/deceleration of the terminal 800 including the wireless charging receiver, and a change in the temperature of the terminal 800 including the wireless charging receiver. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communication between the terminal 800 comprising the wireless charging receiver and other devices in a wired or wireless manner. The terminal 800 including the wireless charging receiving end may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal 800 including the wireless charging receiving terminal may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic elements for performing the above-described method.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the terminal 800 comprising the wireless charging receiving end, to perform the above method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Embodiments of the present application provide a non-transitory computer-readable storage medium, where instructions, when executed by an internal processor of a terminal including a wireless charging receiver, enable a mobile charging device to perform a wireless charging method, the method including:

determining the receiving power of the wireless charging receiving end;

Further, the determining the charging power of the wireless charging according to the power interval corresponding to the actual loss includes:

Further, if the actual loss does not correspond to the power interval in which the current charging power is located, adjusting the current charging power includes:

Further, the method further comprises:

Further, the first type of charging protocol includes: a proprietary charging protocol or an extended power specification EPP protocol.

The embodiment of the application provides a non-transitory computer readable storage medium, and when instructions in the storage medium are executed by an internal processor of a charger including a wireless charging receiver, the instructions enable a mobile charging device to execute a wireless charging method, wherein the method includes:

Further, the charging signal value includes: the input current value and the input voltage value of an inverter in the wireless charging sending terminal; the method further comprises the following steps: and acquiring the input current value and the input voltage value.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention 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 invention is limited only by the appended claims.

Claims

1. A wireless charging method is applied to a wireless charging receiving end, and the method comprises the following steps:

determining the receiving power of the wireless charging receiving end;

2. The method of claim 1, wherein the determining the charging power for wireless charging according to the power interval corresponding to the actual loss comprises:

3. The method of claim 2, wherein the adjusting the current charging power if the actual loss does not correspond to the power interval in which the current charging power is located comprises:

4. A method according to claim 2 or 3, characterized in that the method further comprises:

5. The method according to any one of claims 1 to 3, further comprising:

6. The method of claim 5, further comprising:

7. The method of claim 5, wherein the first type of charging protocol comprises: a proprietary charging protocol or an extended power specification EPP protocol.

8. A wireless charging method is applied to a wireless charging sending end, and the method comprises the following steps:

9. The method of claim 8, wherein the charging signal value comprises: the input current value and the input voltage value of an inverter in the wireless charging sending terminal;

the method further comprises the following steps:

and acquiring the input current value and the input voltage value.

10. A wireless charging device is applied to a wireless charging receiving end, and the method comprises the following steps:

11. The apparatus of claim 10, wherein the third determining module is configured to determine whether the actual loss corresponds to a power interval in which the current charging power is located according to the actual loss and a target loss in the power interval in which the current charging power is located; and if the actual loss does not correspond to the power interval where the current charging power is located, adjusting the current charging power.

12. The apparatus of claim 11, wherein the third determining module is configured to reduce the current charging power if the actual loss does not correspond to a power interval in which the current charging power is located and the actual loss is greater than the target loss in the power interval in which the current charging power is located.

13. The apparatus of claim 11 or 12, further comprising:

14. The apparatus of any one of claims 10 to 13, wherein the method apparatus further comprises:

15. The apparatus of claim 14, further comprising:

16. The apparatus of claim 14, wherein the first type of charging protocol comprises: a proprietary charging protocol or an extended power specification EPP protocol.

17. A wireless charging device is applied to a wireless charging sending end, and the method comprises the following steps:

18. The apparatus of claim 17, wherein the charging signal value comprises: the input current value and the input voltage value of an inverter in the wireless charging sending terminal;

the device further comprises:

19. A charging device, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to enable the method provided by any one of claims 1 to 7 or 8 to 9 by executing the executable instructions.

20. A computer storage medium having executable instructions stored thereon; the executable instructions, when executed by a processor, are capable of implementing the method as provided in any one of claims 1 to 7 or 8 to 9.