CN108448694B - Wireless charging equipment, method and device and electronic equipment - Google Patents
Wireless charging equipment, method and device and electronic equipment Download PDFInfo
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- CN108448694B CN108448694B CN201810268897.4A CN201810268897A CN108448694B CN 108448694 B CN108448694 B CN 108448694B CN 201810268897 A CN201810268897 A CN 201810268897A CN 108448694 B CN108448694 B CN 108448694B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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Abstract
The disclosure relates to a wireless charging device, a method and a device thereof, and an electronic device. This wireless charging equipment includes: a receiving circuit and a receiving controller; the receiving controller is connected with the receiving circuit; the receiving circuit outputs a charging voltage to the battery; the receiving controller is used for generating a control instruction according to the real-time voltage of the battery and sending the control instruction to the receiving circuit; the receiving circuit is used for responding to the control instruction to adjust the charging voltage transmitted to the battery; the difference value between the charging voltage and the real-time voltage belongs to a preset range; and the upper limit value of the preset range is determined according to the internal resistance of the battery. It can be seen that the present embodiment can reduce the input power or input voltage of the receiving circuit; and the power consumption of the receiving circuit can be reduced, and the conversion efficiency of the receiving circuit can be improved. In addition, the temperature of the receiving loop can be reduced, and the charging speed of the battery can be improved.
Description
Technical Field
The present disclosure relates to the field of power technologies, and in particular, to a wireless charging device, a method and an apparatus thereof, and an electronic device.
Background
In the wireless charging process, the receiving circuit of the mobile terminal outputs a fixed direct current voltage by a voltage reduction circuit (such as a DC-DC circuit), and then the direct current voltage is converted into a charging voltage required by a battery by a power control circuit. The voltage difference between the input voltage and the output voltage of the receiving circuit is large, and the power consumption of the converted voltage is increased, so that the output efficiency of the receiving circuit is low. In addition, the power consumption increases the temperature of the receiving circuit, and if the temperature is controlled, the charging voltage needs to be reduced, which affects the charging speed of the battery, and if the temperature is not controlled, the conversion efficiency of the voltage reducing circuit and the power control circuit is affected.
Disclosure of Invention
The present disclosure provides a wireless charging device, a method and an apparatus thereof, and an electronic device, so as to solve the deficiencies in the related art.
According to a first aspect of embodiments of the present disclosure, there is provided a wireless charging device, the device comprising: a receiving circuit and a receiving controller; the receiving controller is connected with the receiving circuit; the receiving circuit outputs a charging voltage to the battery;
the receiving controller is used for generating a control instruction according to the real-time voltage of the battery and sending the control instruction to the receiving circuit;
the receiving circuit is used for responding to the control instruction to adjust the charging voltage transmitted to the battery; the difference value between the charging voltage and the real-time voltage belongs to a preset range; and the upper limit value of the preset range is determined according to the internal resistance of the battery.
Optionally, the receiving circuit comprises: the receiving coil, the rectifying circuit and the voltage conversion circuit; the receiving coil is connected with the rectifying circuit; the voltage conversion circuit is connected with the rectifying circuit; the receiving controller is connected with the voltage conversion circuit;
the receiving coil is used for receiving the radiated alternating current electric energy and transmitting the alternating current electric energy to the rectifying circuit;
the rectifying circuit is used for rectifying the alternating current electric energy into direct current voltage;
the voltage conversion circuit is used for converting the direct current voltage into a charging voltage according to the control instruction.
Optionally, the receiving controller is further connected to the rectifying circuit, and is further configured to send the control instruction to the rectifying circuit;
the rectifying circuit is used for rectifying the alternating current energy into direct current voltage corresponding to the control instruction.
Optionally, the receiving circuit further comprises: receiving a protection circuit; the receiving protection circuit is respectively connected with the rectifying circuit and the receiving controller;
the receiving controller is further used for respectively obtaining the output voltage and the output current of the rectifying circuit and the output voltage and the output current of the voltage conversion circuit, and controlling the rectifying circuit through the receiving protection circuit according to the comparison result of the output voltage and the voltage threshold and/or the comparison result of the output current and the current threshold.
Optionally, the receiving controller is further connected to a power management module of the battery, and the power management module is configured to send the detected real-time temperature of the battery to the receiving controller; the receiving controller is further used for generating a control instruction according to the real-time voltage and the real-time temperature.
Optionally, the receiving controller is further configured to obtain a protection signal sent by a power management module, and generate the control instruction according to the real-time voltage and the protection signal.
Optionally, the apparatus further comprises: a transmit circuit and a transmit controller; the transmitting controller is connected with the transmitting circuit; the transmitting circuit is used for transmitting power to the receiving circuit through wireless connection;
the receiving controller is further used for sending the control instruction to the transmitting controller;
the transmitting controller is used for responding to the control instruction to adjust the output power of the transmitting circuit.
Optionally, the transmitting circuit comprises a charger; the charger is connected with the emission controller;
the charger is used for responding to the control instruction received by the transmitting controller to adjust the output voltage of the charger, and outputting the voltage lower than the expected output voltage of the charger when the expected output voltage of the charger corresponding to the control instruction is abnormal.
According to a second aspect of the embodiments of the present disclosure, there is provided a wireless charging method, the method including:
acquiring the real-time voltage of the battery;
generating a control instruction according to the real-time voltage, and sending the control instruction to a receiving circuit; the control instructions instruct the receive circuit to adjust a charging voltage transmitted to the battery;
the difference value between the charging voltage and the real-time voltage belongs to a preset range; and the upper limit value of the preset range is determined according to the internal resistance of the battery.
Optionally, the method further comprises:
sending the control instruction to a transmitting controller; the control instructions instruct the transmit controller to adjust the output power of the transmit circuit.
Optionally, the transmitting circuit comprises a charger; the charger is connected with the emission controller; the transmission controller sends the control instruction to the charger; the method further comprises the following steps:
the charger analyzes the control instruction to obtain the expected output voltage of the charger corresponding to the control instruction;
and if the expected output voltage of the charger is abnormal, outputting a voltage lower than the expected output voltage of the charger.
Optionally, the method further comprises:
acquiring the real-time temperature of the battery;
generating a control command according to the real-time voltage comprises:
and generating a control instruction according to the real-time voltage and the real-time temperature.
Optionally, the method further comprises:
acquiring a protection signal sent by a power management module;
generating a control command according to the real-time voltage comprises:
and generating a control instruction according to the real-time voltage and the protection signal.
According to a third aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including:
the wireless charging device of the first aspect;
a launch controller;
receiving a controller;
a memory for storing the launch controller executable instructions;
wherein the receiving controller is configured to:
acquiring the real-time voltage of the battery;
generating a control instruction according to the real-time voltage, and sending the control instruction to a receiving circuit; the control instructions instruct the receive circuit to adjust a charging voltage transmitted to the battery;
the difference value between the charging voltage and the real-time voltage belongs to a preset range; and the upper limit value of the preset range is determined according to the internal resistance of the battery.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements:
acquiring the real-time voltage of the battery;
generating a control instruction according to the real-time voltage, and sending the control instruction to a receiving circuit; the control instructions instruct the receive circuit to adjust a charging voltage transmitted to the battery;
the difference value between the charging voltage and the real-time voltage belongs to a preset range; and the upper limit value of the preset range is determined according to the internal resistance of the battery.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in the embodiment, the charging voltage output by the receiving circuit is adjusted according to the actual voltage of the battery, so that the difference value between the charging voltage and the actual voltage belongs to a preset range; and the upper limit value of the preset range is determined according to the internal resistance of the battery. It can be seen that, in the embodiment, the input power or the input voltage of the receiving circuit can be reduced by making the difference between the charging voltage and the actual voltage fall within the preset range; and, with the increase of the actual voltage of the battery, the voltage difference between the input voltage and the output voltage of the receiving circuit becomes smaller, thus can reduce the electric energy loss of the receiving circuit, raise its conversion efficiency. In addition, the temperature of the receiving loop can be reduced, and the charging speed of the battery can be improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a block diagram of a wireless charging apparatus shown in the related art;
FIG. 2 is a block diagram illustrating a wireless charging device in accordance with an exemplary embodiment;
fig. 3 is a block diagram illustrating a wireless charging device according to another exemplary embodiment;
fig. 4 is a block diagram illustrating a wireless charging device according to yet another exemplary embodiment;
fig. 5 is a block diagram illustrating a wireless charging device according to another exemplary embodiment;
fig. 6 is a block diagram illustrating a wireless charging device according to another exemplary embodiment;
fig. 7-11 are schematic flow diagrams illustrating a wireless charging method according to an example embodiment;
FIG. 12 is a block diagram illustrating an electronic device in accordance with an example 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 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 devices consistent with certain aspects of the present disclosure as recited in the claims below.
The structure of a wireless charging device in the related art includes a voltage step-down circuit and a voltage conversion circuit, and fig. 1 is a block diagram of the structure of a wireless charging device shown in the related art. Referring to fig. 1, in a wireless charging process, a receiving circuit of a mobile terminal outputs a fixed direct current voltage by a voltage reduction circuit (e.g., a DC-DC circuit), and then the direct current voltage is converted into a charging voltage required by a battery by a power control circuit. The voltage difference between the input voltage and the output voltage of the receiving circuit is large, and the power consumption of the converted voltage is increased, so that the output efficiency of the receiving circuit is low. In addition, the power consumption increases the temperature of the receiving circuit, and if the temperature is controlled, the charging voltage needs to be reduced, which affects the charging speed of the battery, and if the temperature is not controlled, the conversion efficiency of the voltage reducing circuit and the power control circuit is affected.
In order to solve the above problem, an embodiment of the present disclosure provides a wireless charging device, and fig. 2 is a block diagram illustrating a structure of a wireless charging device according to an exemplary embodiment. Referring to fig. 2, the wireless charging apparatus includes: a reception circuit 10 and a reception controller 20; the receiving controller 20 is connected to the receiving circuit 10; the receiving circuit 10 outputs a charging voltage to the battery 30;
the receiving controller 20 is configured to generate a control instruction according to the real-time voltage of the battery 30, and send the control instruction to the receiving circuit 10;
the receiving circuit 10 is used for adjusting the charging voltage transmitted to the battery 30 in response to the control instruction; the difference value of the charging voltage and the real-time voltage belongs to a preset range; the upper limit value of the preset range is determined according to the internal resistance of the battery.
It is understood that the upper limit value of the preset range may be determined according to the internal resistance of the battery. The upper limit value and the internal resistance are in a positive correlation relationship, and for example, when the internal resistance of the battery becomes large, the upper limit value may be appropriately large; when the internal resistance of the battery is small, the upper limit value can be appropriately small. In one embodiment, the difference between the charging voltage and the real-time voltage is 50mV, and the predetermined range may be 0-50 mV. Of course, the upper limit value may also be adjusted according to a specific scenario, which is not described herein.
It should be noted that the control commands may be a group or a plurality of groups. For example, when the control command is a group, the receiving controller may generate a control signal according to the real-time voltage, and then combine the voltage conversion circuit 103 with the control rectification circuit 102, the power amplifier 402 in the transmitting circuit, or the charger 403 that appears later, and then combine a plurality of control signals into one control command, although each control signal may also be used as one control command, and the scheme of the embodiment of the present disclosure may also be implemented.
It can be seen that, in the present embodiment, by making the difference between the charging voltage output by the receiving circuit 10 and the actual voltage of the battery 30 fall within the preset range, the input power or the input voltage of the receiving circuit 10 can be reduced. In addition, as the actual voltage of the battery increases, the voltage difference between the input voltage and the output voltage of the receiving circuit 10 becomes smaller, so that the power consumption of the receiving circuit can be reduced, and the conversion efficiency thereof can be improved. In addition, the present embodiment can also reduce the temperature of the receiving circuit 10 and increase the charging speed of the battery 30.
Fig. 3 is a block diagram illustrating a configuration of a wireless charging device according to an example embodiment. Referring to fig. 3, the wireless charging apparatus includes: a receiving circuit 10 and a receiving controller 20. The functions and the connection relationship between the receiving circuit 10 and the receiving controller 20 may refer to the functions and the connection relationship between the receiving circuit 10 and the receiving controller 20 in the wireless charging device shown in fig. 1, which are not described herein again. Wherein,
the receiving circuit 10 includes a receiving coil 101, a rectifying circuit 102, and a voltage converting circuit 103. The receiving coil 101 is connected with a rectifying circuit 102; the voltage conversion circuit 103 is connected to the rectifier circuit 102; the reception controller 20 is connected to the voltage conversion circuit 103;
the receiving coil 101 is used for receiving the radiated alternating current electric energy and sending the alternating current electric energy to the rectifying circuit 102;
the rectifier circuit 102 is configured to rectify ac power into dc voltage;
the voltage conversion circuit 103 is configured to convert the dc voltage into a charging voltage according to a control instruction.
Compared with the prior art that the voltage reduction circuit and the power adjustment circuit are adopted to convert the direct current voltage into the charging voltage, the rectifying circuit 102 in the receiving circuit 10 of the embodiment outputs the direct current voltage, the voltage conversion circuit 103 converts the direct current voltage into the charging voltage, so that a voltage reduction circuit can be omitted, namely, a voltage conversion process from the direct current voltage to the charging voltage can be omitted, the electric energy loss in the conversion process can be saved, and the conversion efficiency of the receiving circuit can be improved.
In an embodiment, referring to fig. 4, on the basis of the wireless charging device shown in fig. 3, the wireless charging device may further include: the protection circuit 104 is received. The receiving protection circuit 104 is connected to the rectifying circuit 102 and the receiving controller 20, respectively; the receiving controller 20 is further configured to obtain an output voltage and an output current of the rectifying circuit 102 and an output voltage and an output current of the voltage converting circuit 103, respectively, and control the rectifying circuit 102 through the receiving protection circuit 104 according to a comparison result of the output voltage and the voltage threshold and the output current and the current threshold.
For example, if the output voltage of the rectifying circuit 102 is 10V and the voltage threshold is 9V, the comparison result indicates that the output voltage is too high, and the reception protection circuit 104 controls the output voltage of the rectifying circuit 102 to lower the output voltage to 9V, thereby protecting the reception circuit 10 and the battery 30. For another example, if the output current of the rectifying circuit 102 is 5A and the current threshold is 3.5A, the comparison result indicates that the output current is too high, and at this time, the receiving protection circuit 104 controls the output current of the rectifying circuit 102 to reduce the output current to 3.5V, thereby protecting the receiving circuit 10 and the battery 30. For another example, if the output voltage and the output current exceed their respective thresholds at the same time, the output voltage and the output current are adjusted separately (as in the above examples), or the output voltage and the output current may be adjusted synchronously or in steps.
It can be seen that, in the present embodiment, by controlling the output voltage and the output current of the rectifying circuit 102, the output voltage or the output current of the rectifying circuit 102 can be prevented from being too large to damage the battery 30, so that the service life of the battery 30 can be prolonged.
In one embodiment, the receiving controller 20 is further connected to a power management module (not shown) of the battery 30. The power management module is configured to send the detected real-time temperature of the battery 30 to the receiving controller 20. Receiving controller 20 is also configured to generate control instructions based on the real-time voltage and real-time temperature of battery 30.
For example, if the output voltage of the rectifying circuit 102 is 10V and the voltage threshold is 9V, the comparison result indicates that the output voltage is too high, and the reception protection circuit 104 controls the output voltage of the rectifying circuit 102 to lower the output voltage to 9V, thereby protecting the reception circuit 10 and the battery 30. Meanwhile, the real-time temperature of the battery 30 is increased to 60 degrees celsius, and at this time, the real-time temperature of the battery 30 needs to be decreased to 45 degrees celsius. On the basis of the output voltage, a voltage adjustment amount corresponding to the real-time temperature is superposed, for example, -0.5V, that is, the output voltage of the rectifying circuit 102 can be controlled to be 8.5V by combining the output voltage and the real-time temperature.
For another example, if the output current of the rectifying circuit 102 is 5A and the current threshold is 3.5A, the comparison result indicates that the output current is too high, and at this time, the receiving protection circuit 104 controls the output current of the rectifying circuit 102 to reduce the output current to 3.5V, thereby protecting the receiving circuit 10 and the battery 30. Meanwhile, the real-time temperature of the battery 30 is increased to 60 degrees celsius, and at this time, the real-time temperature of the battery 30 needs to be decreased to 45 degrees celsius. On the basis of the output current, a current adjustment amount corresponding to the real-time temperature is superposed, for example, -0.5A, namely the output current of the rectifying circuit 102 can be controlled to be 3A by combining the output current and the real-time temperature.
It can be seen that, in the present embodiment, the output voltage of the rectifying circuit 102 and the real-time temperature of the battery 30 are combined to control the charging voltage output by the receiving circuit 10, so that the real-time temperature of the battery 30 is kept within a reasonable range, and the purposes of protecting the battery 30 and prolonging the service life of the battery 30 are achieved.
In an embodiment, the receiving controller 20 may further receive a protection signal output by the power management module, and then control the output voltage and the output current of the rectifying circuit 102 through the receiving protection circuit 104 according to the protection signal. Of course, the receiving controller 10 may generate a control instruction according to the real-time voltage of the battery 20 and the protection signal, and then send the control instruction to the rectifying circuit 102 and the voltage converting circuit 103, respectively. The rectifying circuit 102 and the voltage conversion circuit 103 perform voltage conversion corresponding to the control command.
For example, the protection signal output by the power management module is "1", where the symbol "1" indicates that the battery temperature is too high. At this time, the adjustment voltage to be superimposed on the output voltage or the adjustment current to be superimposed on the output current may be called according to the protection signal, so as to superimpose the adjustment voltage (or the adjustment current) on the output voltage (or the output current), respectively. Then, the reception controller 20 generates a control instruction according to the superimposed result, and sends the control instruction to the rectifier circuit 102 and the voltage conversion circuit 103. Of course, the protection signal may also be represented by other symbols, and may be set according to a specific scenario, which is not limited herein.
It can be seen that, in the present embodiment, the receiving circuit and the battery can be further protected by receiving the protection signal, so as to prolong the service life of the receiving circuit and the battery.
Fig. 5 is a block diagram illustrating a configuration of a wireless charging device according to another exemplary embodiment. Referring to fig. 5, on the basis of the wireless charging device shown in fig. 3 or fig. 4, the receiving controller 20 in the wireless charging device may also be connected with the rectifying circuit 102 for sending a control instruction to the rectifying circuit 102. When receiving the control command, the rectifier circuit 102 rectifies the ac power to a dc voltage corresponding to the control command. In one embodiment, before the rectifying circuit 102 is controlled, the output dc voltage thereof may be 9V, and then the voltage converting circuit 103 converts the 9V dc voltage into a charging voltage (about 5V). After being controlled, the output direct voltage can be 5.5V, 6V, 7V or 8V, i.e. the rectifying circuit 102 has more output choices. Thus, the voltage difference between the input voltage and the output voltage of the voltage conversion circuit 103 can be made small, and the conversion frequency of the voltage conversion circuit 103 can be reduced, thereby reducing the loss thereof.
It can be seen that in the present embodiment, the receiving controller 20 controls the output of the rectifying circuit 102, and the voltage and the current between the rectifying circuit 102 and the voltage converting circuit 103 are matched, so as to optimize the conversion efficiency of the two, further reduce the loss of the receiving circuit 10, further reduce the temperature of the receiving circuit 10 and the battery 30, and facilitate to increase the charging speed of the battery 30.
It is to be understood that, in the wireless charging device shown in fig. 1 to 5, the wireless charging device may further include a transmission circuit 40 and a transmission controller 50. The transmitting circuit 40 may include a transmitting coil 401, a power amplifier 402, a charger 403, and a transmission protection circuit 404, among others. The charger 403 can insert 220V-50 Hz ac (for example, in continental china), convert the ac into dc voltage, and then the power amplifier 402 adjusts the dc voltage to transmit the dc voltage to the transmitting coil 401, and the transmitting coil 401 radiates ac power to the receiving coil 101.
In the process of radiating the ac power to the receiving coil 101, the receiving controller 20 may send the real-time temperature and protection signal from the power management module to the transmitting controller 50 through the receiving coil 101 and the transmitting coil 401. For example, the real-time temperature is 50 degrees celsius, the 50 degrees celsius is converted into a binary format, and the binary real-time temperature is modulated (frequency modulation, amplitude modulation) and then transmitted to the transmission controller 50 through the receiving coil 101 and the transmitting coil 401. The transmit controller 50 demodulates the real-time temperature and controls the output power of the power amplifier 402 according to the real-time temperature. For example, the transmission protection circuit 404 may limit the output current and the output voltage of the power amplifier 402, thereby reducing the power received by the receiving circuit 10 and achieving the purpose of reducing the real-time temperature of the battery 30. For another example, the transmission protection circuit 404 may adjust the amplification factor of the power amplifier 402, and the power amplifier 402 automatically adjusts the output voltage and the output current, so as to achieve the purpose of adjusting the output power of the transmission circuit 40, and further adjust the real-time temperature of the battery 30.
Fig. 6 is a block diagram illustrating a structure of a wireless charging device according to another exemplary embodiment. Referring to fig. 6, on the basis of the wireless charging device shown in fig. 2 to 5, the transmission controller 50 in the wireless charging device may also be connected to a charger 403. Thus, the charger 403 can adjust its output voltage in response to the control instruction received by the transmission controller 50. For example, when the battery 30 is just charged, the real-time voltage of the battery 30 is low (e.g., 3.5V), and the output voltage of the transmitting coil 401 may be 8.5V; as the real-time voltage of the battery 30 increases (e.g., 5V), the output voltage of the transmitting coil 401 may be adjusted to 10V at this time.
In one embodiment, the transmission controller 50 may also send the received control instruction to the charger 403. Charger 403 may analyze the control command to obtain an output voltage of desired charger 403 corresponding to the control command, and if the output voltage is abnormal, charger 403 may output a voltage lower than the output voltage of desired charger 403.
Assume that the output voltage of the charger 403 is 15V during normal charging of the battery 30. In one scenario, the charger 403 resolves that the expected output voltage is 20V, and the output voltage 20V is compared with 15V to be an abnormal voltage, so as to prevent the transmission voltage from suddenly increasing to damage the battery, the output voltage can be 16V. When it is analyzed that the subsequent control command is still 20V, the charger 403 may adjust the output voltage according to the above steps until 20V is satisfied. It can be seen that, in the present embodiment, by outputting a voltage lower than the desired output voltage, not only can some requirements of the battery 30 be satisfied, but also damage to the battery due to an excessive voltage can be avoided.
In another scenario, the charger 403 may temporarily maintain the current output voltage 20V when it resolves that the expected output voltage is abnormal, such as 20V in the previous scenario; and then, continuing to analyze the control command, and if the plurality of subsequent (the number of which can be set) control commands analyze that the expected output voltage is still 20V, confirming that the battery 30 needs 20V voltage, and directly outputting 20V to meet the actual requirement of the battery 30, so that the probability that the battery 30 is damaged due to overlarge output voltage is reduced.
Fig. 7 is a flow chart diagram illustrating a wireless charging method according to an example embodiment. Referring to fig. 7, the wireless charging method includes:
701, acquiring real-time voltage of a battery;
702, generating a control instruction according to the real-time voltage, and sending the control instruction to a receiving circuit; the control instructions instruct the receive circuit to adjust a charging voltage transmitted to the battery;
the difference value between the charging voltage and the real-time voltage belongs to a preset range; and the upper limit value of the preset range is determined according to the internal resistance of the battery.
It can be seen that, in the embodiment, the input power or the input voltage of the receiving circuit can be reduced by making the difference between the charging voltage and the actual voltage fall within the preset range; and, with the increase of the actual voltage of the battery, the voltage difference between the input voltage and the output voltage of the receiving circuit becomes smaller, thus can reduce the electric energy loss of the receiving circuit, raise its conversion efficiency. In addition, the temperature of the receiving loop can be reduced, and the charging speed of the battery can be improved.
Fig. 8 is a flow chart diagram illustrating a wireless charging method according to an example embodiment. Referring to fig. 8, on the basis of the wireless charging method shown in fig. 7, the wireless charging method may include:
801, sending the control instruction to a transmitting controller; the control instructions instruct the transmit controller to adjust the output power of the transmit circuit.
Therefore, in the embodiment, the receiving controller adjusts the output power of the transmitting circuit according to the control instruction, which is beneficial to helping the receiving circuit to adjust the charging voltage and improving the adjustment speed of the charging voltage; and the matching degree of voltage and current can be optimized between the receiving circuit and the transmitting circuit, so that the purposes of reducing the loss of the receiving circuit 10 and further reducing the temperature of the receiving circuit 10 and the battery 30 are achieved.
Fig. 9 is a flow chart diagram illustrating a wireless charging method according to an example embodiment. The transmitting circuit comprises a charger; the charger is connected with the emission controller; the transmission controller sends the control instruction to the charger (corresponding to step 901); referring to fig. 9, on the basis of the wireless charging method shown in fig. 8, the wireless charging method may include:
902, the charger analyzes the control command to obtain an expected output voltage of the charger corresponding to the control command;
and 903, if the output voltage of the expected charger is abnormal, outputting a voltage lower than the output voltage of the expected charger.
It can be seen that, in the present embodiment, by outputting a voltage lower than the desired output voltage, not only can some requirements of the battery 30 be satisfied, but also damage to the battery due to an excessive voltage can be avoided. In addition, the present output voltage may also be temporarily maintained in this embodiment; and then, the control instructions are analyzed continuously, if a plurality of subsequent (quantity can be set) control instructions analyze that the expected output voltages are the same, the expected output voltages are directly output to meet the actual requirement of the battery, and the probability that the battery is damaged due to overlarge output voltages is reduced.
Fig. 10 is a flow chart diagram illustrating a wireless charging method according to an example embodiment. Referring to fig. 10, on the basis of the wireless charging method shown in fig. 7, the wireless charging method may include:
1001, acquiring the real-time temperature of the battery.
At this time, step 702 may include:
generating a control instruction according to the real-time voltage and the real-time temperature, and sending the control instruction to a receiving circuit; the control instructions instruct the receive circuit to adjust a charging voltage transmitted to the battery; the difference value between the charging voltage and the real-time voltage belongs to a preset range; and the upper limit value of the preset range is determined according to the internal resistance of the battery.
In this embodiment, the transmission protection circuit may limit the output current and the output voltage of the power amplifier, thereby reducing the power received by the receiving circuit and achieving the purpose of reducing the real-time temperature of the battery.
Fig. 11 is a flow chart illustrating a wireless charging method according to an example embodiment. Referring to fig. 11, on the basis of the wireless charging method shown in fig. 7, the wireless charging method may include:
1101, acquiring a protection signal sent by a power management module;
at this time, step 702 may include:
generating a control instruction according to the real-time voltage and the protection signal, and sending the control instruction to a receiving circuit; the control instructions instruct the receive circuit to adjust a charging voltage transmitted to the battery; the difference value between the charging voltage and the real-time voltage belongs to a preset range; and the upper limit value of the preset range is determined according to the internal resistance of the battery.
In this embodiment, the transmission protection circuit may limit or reduce the output current and the output voltage of the power amplifier, so as to adjust the output power of the transmission circuit 40, and further adjust the real-time temperature of the battery 30.
It should be noted that the wireless charging method shown in each embodiment shown in fig. 7 to 11 is applicable to the wireless charging device shown in each embodiment shown in fig. 2 to 6, and each step of the wireless charging method may refer to the description of the wireless charging device. It can be understood that when the structure of the wireless charging device is changed, the wireless charging method is also changed accordingly, and is not described in detail here.
FIG. 12 is a block diagram illustrating an electronic device in accordance with an example embodiment. For example, the electronic device 1200 may be a mobile phone, a computer, a digital broadcast terminal, 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. 12, electronic device 1200 may include one or more of the following components: the processing component 1202, the memory 1204, the power component 1206, the multimedia component 1208, the audio component 1210, the input/output (I/O) interface 1212, the sensor component 1214, and the communications component 1216 may also include the wireless charging apparatus described in fig. 2-6.
The processing component 1202 generally controls overall operation of the apparatus 1200, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 1202 may include one or more processors 1220 to execute instructions. Further, the processing component 1202 can include one or more modules that facilitate interaction between the processing component 1202 and other components. For example, the processing component 1202 can include a multimedia module to facilitate interaction between the multimedia component 1208 and the processing component 1202. In one embodiment, the processing component 1202 may include a transmit controller and a receive controller that may process information such as real-time voltage, real-time temperature, or protection signals of the battery; the transmitting controller can transmit and receive the control instruction sent by the controller, and can also process information such as real-time voltage, real-time temperature or protection signals of the battery.
The memory 1204 is configured to store various types of data to support operation at the apparatus 1200. Examples of such data include instructions for any application or method operating on the device 1200, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 1204 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. In an embodiment, the memory 1204 may store a memory that transmits controller-executable instructions. Wherein the receiving controller is configured to: acquiring the real-time voltage of the battery; generating a control instruction according to the real-time voltage, and sending the control instruction to a receiving circuit; the control instructions instruct the receive circuit to adjust a charging voltage transmitted to the battery; the difference value between the charging voltage and the real-time voltage belongs to a preset range; and the upper limit value of the preset range is determined according to the internal resistance of the battery.
A power supply component 1206 provides power to the various components of the device 1200. Power components 1206 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for apparatus 1200.
The multimedia components 1208 include a screen that provides an output interface between the device 1200 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.
The I/O interface 1212 provides an interface between the processing component 1202 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 1214 includes one or more sensors for providing various aspects of state assessment for the apparatus 1200. For example, the sensor assembly 1214 may detect an open/closed state of the apparatus 1200, the relative positioning of the components, such as a display and keypad of the apparatus 1200, the sensor assembly 1214 may also detect a change in the position of the apparatus 1200 or a component of the apparatus 1200, the presence or absence of user contact with the apparatus 1200, orientation or acceleration/deceleration of the apparatus 1200, and a change in the temperature of the apparatus 1200. The sensor assembly 1214 may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly 1214 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 1214 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communications component 1216 is configured to facilitate communications between the apparatus 1200 and other devices in a wired or wireless manner. The apparatus 1200 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 1216 receives the broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communications component 1216 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 example embodiment, the apparatus 1200 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as memory 1204 comprising instructions, executable by processor 1220 of apparatus 1200, is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (14)
1. A wireless charging apparatus, characterized in that the apparatus comprises: a receiving circuit and a receiving controller; the receiving controller is connected with the receiving circuit; the receiving circuit outputs a charging voltage to the battery;
the receiving controller is used for generating a control instruction according to the real-time voltage of the battery and sending the control instruction to the receiving circuit;
the receiving circuit is used for responding to the control instruction to adjust the charging voltage transmitted to the battery; the difference value between the charging voltage and the real-time voltage belongs to a preset range; the upper limit value of the preset range is determined according to the internal resistance of the battery, and the preset range is 0-50 mV;
the receiving circuit includes: the receiving coil, the rectifying circuit and the voltage conversion circuit; the receiving coil is connected with the rectifying circuit; the voltage conversion circuit is connected with the rectifying circuit; the receiving controller is connected with the voltage conversion circuit;
the receiving coil is used for receiving the radiated alternating current electric energy and transmitting the alternating current electric energy to the rectifying circuit;
the rectifying circuit is used for rectifying the alternating current electric energy into direct current voltage;
the voltage conversion circuit is used for converting the direct current voltage into a charging voltage according to the control instruction.
2. The wireless charging device according to claim 1, wherein the receiving controller is further connected to the rectifying circuit, and is further configured to send the control instruction to the rectifying circuit;
the rectifying circuit is used for rectifying the alternating current energy into direct current voltage corresponding to the control instruction.
3. The wireless charging device of claim 1, wherein the receive circuit further comprises: receiving a protection circuit; the receiving protection circuit is respectively connected with the rectifying circuit and the receiving controller;
the receiving controller is further used for respectively obtaining the output voltage and the output current of the rectifying circuit and the output voltage and the output current of the voltage conversion circuit, and controlling the rectifying circuit through the receiving protection circuit according to the comparison result of the output voltage and the voltage threshold and/or the comparison result of the output current and the current threshold.
4. The wireless charging device of claim 1, wherein the receiving controller is further connected to a power management module of the battery, and the power management module is configured to send the detected real-time temperature of the battery to the receiving controller; the receiving controller is further used for generating a control instruction according to the real-time voltage and the real-time temperature.
5. The wireless charging device of claim 1, wherein the receiving controller is further configured to obtain a protection signal sent by a power management module, and generate the control command according to the real-time voltage and the protection signal.
6. The wireless charging device according to any one of claims 1 to 5, wherein the device further comprises: a transmit circuit and a transmit controller; the transmitting controller is connected with the transmitting circuit; the transmitting circuit is used for transmitting power to the receiving circuit through wireless connection;
the receiving controller is further used for sending the control instruction to the transmitting controller;
the transmitting controller is used for responding to the control instruction to adjust the output power of the transmitting circuit.
7. The wireless charging device of claim 6, wherein the transmit circuit comprises a charger; the charger is connected with the emission controller;
the charger is used for responding to the control instruction received by the transmitting controller to adjust the output voltage of the charger, and outputting the voltage lower than the expected output voltage of the charger when the expected output voltage of the charger corresponding to the control instruction is abnormal.
8. A wireless charging method is applied to a wireless charging device, the wireless charging device comprises a receiving circuit, the receiving circuit comprises a voltage conversion circuit, and the method comprises the following steps:
acquiring the real-time voltage of the battery;
generating a control instruction according to the real-time voltage, and sending the control instruction to a voltage conversion circuit of the receiving circuit; the control instructions instruct a voltage conversion circuit of the receiving circuit to adjust a charging voltage transmitted to the battery;
the difference value between the charging voltage and the real-time voltage belongs to a preset range; the upper limit value of the preset range is determined according to the internal resistance of the battery, and the preset range is 0-50 mV.
9. The wireless charging method of claim 8, further comprising:
sending the control instruction to a transmitting controller; the control instructions instruct the transmit controller to adjust the output power of the transmit circuit.
10. The wireless charging method of claim 9, wherein the transmitting circuit comprises a charger; the charger is connected with the emission controller; the transmission controller sends the control instruction to the charger; the method further comprises the following steps:
the charger analyzes the control instruction to obtain the expected output voltage of the charger corresponding to the control instruction;
and if the expected output voltage of the charger is abnormal, outputting a voltage lower than the expected output voltage of the charger.
11. The wireless charging method of claim 8, further comprising:
acquiring the real-time temperature of the battery;
generating a control command according to the real-time voltage comprises:
and generating a control instruction according to the real-time voltage and the real-time temperature.
12. The wireless charging method of claim 8, further comprising:
acquiring a protection signal sent by a power management module;
generating a control command according to the real-time voltage comprises:
and generating a control instruction according to the real-time voltage and the protection signal.
13. An electronic device, characterized in that the electronic device comprises:
the wireless charging device of any one of claims 1 to 7;
a launch controller;
receiving a controller;
a memory for storing the launch controller executable instructions;
wherein the receiving controller is configured to:
acquiring the real-time voltage of the battery;
generating a control instruction according to the real-time voltage, and sending the control instruction to a voltage conversion circuit of the receiving circuit; the control instructions instruct a voltage conversion circuit of the receiving circuit to adjust a charging voltage transmitted to the battery;
the difference value between the charging voltage and the real-time voltage belongs to a preset range; the upper limit value of the preset range is determined according to the internal resistance of the battery, and the preset range is 0-50 mV.
14. A computer-readable storage medium on which a computer program is stored, the program, when executed by a processor, implementing:
acquiring the real-time voltage of the battery;
generating a control instruction according to the real-time voltage, and sending the control instruction to a voltage conversion circuit of a receiving circuit; the control instructions instruct a voltage conversion circuit of the receiving circuit to adjust a charging voltage transmitted to the battery;
the difference value between the charging voltage and the real-time voltage belongs to a preset range; the upper limit value of the preset range is determined according to the internal resistance of the battery, and the preset range is 0-50 mV.
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| EP3872950A4 (en) | 2018-12-21 | 2021-11-03 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Transmitting apparatus, receiving apparatus, power supply device and wireless charging method |
| CN111446515B (en) * | 2020-04-02 | 2022-03-25 | 联想(北京)有限公司 | Charging method and device and electronic equipment |
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