Wireless charging receiving end, terminal and wireless charging method

Abstract

The present disclosure relates to a wireless charging receiving end, a terminal and a wireless charging method. The wireless charging receiving end includes: an energy receiver (11), a receiving processor (12), and a wireless charging management chip (13); the receiving processor (12) is connected to the energy receiver (11) and the wireless charging management chip (13), respectively, to convert alternating current into direct current and modulate and demodulate wireless signals; the wireless charging management chip (13) is connected to a battery (3) to control the charging of the battery (3). Since the maximum input voltage allowed by the wireless charging management chip is greater than the maximum input voltage allowed by the power management chip in the related art, the charging power and charging efficiency can be increased by increasing the input voltage of the wireless charging management chip, thereby improving the user experience. In addition, the terminal can be quickly charged without setting an additional wired charging interface, thereby making the terminal more waterproof and safer.

Description

Technical Field

[0001] The present disclosure relates to the field of charging technology, and in particular to a wireless charging receiver, a terminal, and a wireless charging method. Background Art

[0002] With the development of wireless charging technology, more and more terminals, including many wearable devices and smart terminals, have begun to use wireless charging technology. Specifically, the terminal being charged acts as a wireless charging receiver, converting and processing the wireless signal emitted by the wireless charging transmitter to obtain a corresponding charging signal. This charging signal is used to provide an input signal to the power management chip, which enables the power management chip to charge the terminal's battery. In order to improve the power and efficiency of wireless charging technology, two solutions are needed: one is to increase the current of the wireless charging signal while maintaining the voltage unchanged, thereby increasing the power; the other is to increase the input voltage while maintaining the current unchanged to achieve a power increase.

[0003] However, in the first of these two solutions, due to the DC and AC impedance of the terminal's receiving coil, the coil will heat up severely when the current exceeds a certain threshold. Therefore, increasing the current to increase power is relatively effective. In the second solution, because the power management chip responsible for charging in the terminal has input voltage restrictions (generally no more than 12V), increasing the voltage to increase power is also limited. Therefore, due to the limitations of the terminal's receiving coil and power management chip, the relevant wireless charging solutions cannot effectively achieve power increases, and charging efficiency is low. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a wireless charging receiving end, a terminal and a wireless charging method.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a wireless charging receiving terminal, comprising:

[0006] Energy receiver, receiving processor, wireless charging management chip;

[0007] The receiving processor is connected to the energy receiver and the wireless charging management chip respectively, converting AC power into DC power and modulating and demodulating wireless signals;

[0008] The wireless charging management chip is connected to the battery to control the charging of the battery.

[0009] Optionally, the wireless charging management chip includes a plurality of metal oxide semiconductor field effect transistors.

[0010] Optionally, the energy receiver includes a receiving end coil and a receiving end capacitor;

[0011] The receiving end coil is connected to the receiving processor via the receiving end capacitor, and is used to generate magnetic induction with the energy transmitter of the wireless charging transmitting end to send and receive wireless signals.

[0012] Optionally, the receiving processor and the wireless charging management chip are respectively connected to the terminal processor;

[0013] The receiving processor is used to convert alternating current into direct current, demodulate the wireless signal received from the energy receiver, and modulate the wireless signal sent by the wireless charging management chip via the terminal processor.

[0014] Optionally, the wireless charging receiving end further includes:

[0015] Temperature collection element, used to collect terminal temperature;

[0016] The wireless charging management chip is connected to the temperature acquisition element and is used to reduce the current charging current and charge the battery according to the reduced current when the terminal temperature acquired by the temperature acquisition element is greater than a preset temperature threshold.

[0017] Optionally, the wireless charging receiving end further includes a charging control switch and a wired charging management chip;

[0018] The charging control switch has one end connected to the receiving processor and the wireless charging management chip respectively, and the other end connected to the wired charging management chip;

[0019] One end of the wired charging management chip is connected to the wireless charging management chip, and the other end is connected to the battery, and a wired charging interface is provided on the wired charging management chip.

[0020] Optionally, the receiving processor includes:

[0021] Rectifier circuit, used to convert AC power into DC power;

[0022] Modulation and demodulation circuits for modulation and demodulation of wireless signals; and

[0023] The control circuit is used to control the operation of the rectifier circuit and the modulation and demodulation circuit.

[0024] According to a second aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0025] Battery;

[0026] terminal processor; and

[0027] The wireless charging receiving terminal provided in the first aspect of the present disclosure;

[0028] Wherein, the wireless charging receiving end is connected to the battery and the terminal processor respectively.

[0029] According to a third aspect of an embodiment of the present disclosure, a wireless charging method is provided, the method comprising:

[0030] Receive the AC power signal sent by the wireless charging transmitter;

[0031] converting the AC power signal into DC power;

[0032] Using the direct current, controlling the battery to charge;

[0033] Optionally, controlling the battery to charge includes:

[0034] Get the voltage and current capability information of the charger;

[0035] Get the current battery voltage of the terminal;

[0036] Determining an input voltage threshold of the wireless charging management chip according to the voltage and current capability information;

[0037] determining a voltage value corresponding to a voltage range to which the input voltage threshold belongs as a target charging voltage of the battery, wherein the higher the lower limit value of the voltage range, the smaller the voltage value corresponding to the voltage range;

[0038] A target charging current of the battery is determined according to the current battery voltage, and the battery is charged according to the target charging voltage and the target charging current.

[0039] Optionally, determining a target charging current of the battery according to the current battery voltage, and charging the battery according to the target charging voltage and the target charging current includes:

[0040] When the current battery voltage is greater than or equal to a first preset voltage threshold and less than a second preset voltage threshold, determining a target charging current for the battery according to the current battery voltage, and performing constant current charging for the battery according to the target charging voltage and the target charging current;

[0041] Repeating the steps of reducing the current charging current to obtain a new target charging current if the current battery voltage rises to the second preset voltage threshold during the constant current charging process, and when the new target charging current is greater than or equal to the preset charging current threshold, performing constant current charging for the battery according to the target charging voltage and the new target charging current, until the new target charging current is less than the charging current threshold;

[0042] When the new target charging current is less than the charging current threshold, constant voltage charging is performed on the battery according to the target charging voltage and the new target charging current.

[0043] Optionally, the method further includes:

[0044] When it is detected that the charging control switch is disconnected and the wired charging interface is occupied, the wired charging management chip controls the battery to perform wired charging;

[0045] When it is detected that the charging control switch is disconnected and the wired charging interface is not occupied, controlling the battery to be wirelessly charged through the wireless charging management chip;

[0046] When it is detected that the charging control switch is closed, the battery is controlled to be wirelessly charged through the wireless charging management chip and the wired charging management chip.

[0047] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects: the maximum input voltage allowed by the wireless charging management chip in the wireless charging receiver is higher than the maximum input voltage allowed by the power management chip in related technologies. Therefore, by increasing the input voltage of the wireless charging management chip, charging power and efficiency can be increased, thereby improving the user experience. In addition, the terminal can be quickly charged without the need for an additional wired charging interface, thereby improving the terminal's waterproof performance and safety.

[0048] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] 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 present disclosure.

[0050] Figure 1 is a block diagram of a wireless charging system according to an exemplary embodiment.

[0051] Figure 2 is a block diagram of a wireless charging system according to another exemplary embodiment.

[0052] Figure 3 The figure is a block diagram of a receiving processor according to an exemplary embodiment.

[0053] Figure 4 The figure is a schematic structural diagram of a wireless charging management chip according to an exemplary embodiment.

[0054] Figure 5 is a block diagram of a wireless charging system according to another exemplary embodiment.

[0055] Figure 6 is a block diagram of a wireless charging system according to another exemplary embodiment.

[0056] Figure 7 is a block diagram of a wireless charging system according to another exemplary embodiment.

[0057] Figure 8 is a block diagram of a wireless charging system according to another exemplary embodiment.

[0058] Figure 9 The figure is a flow chart showing a wireless charging method according to an exemplary embodiment.

[0059] Figure 10 The figure is a flow chart showing a method for controlling battery charging according to an exemplary embodiment.

[0060] Figure 11 The figure is a flow chart showing a method for determining a target charging current of a battery according to an exemplary embodiment.

[0061] Figure 12 The figure is a flow chart showing a method for controlling battery charging according to another exemplary embodiment.

[0062] Description of Reference Numerals

[0063] 1 Wireless charging receiver 2 Wireless charging transmitter

[0064] 3. Battery 4. Terminal Processor

[0065] 5 Power supply 6 Micro switch

[0066] 11 Energy receiver 12 Receiving processor

[0067] 13 Wireless charging management chip 14 Temperature acquisition element

[0068] 15 Charging control switch 16 Wired charging management chip

[0069] 21 Energy transmitter 22 Charger

[0070] 23 Transmitting processor 24 Controller

[0071] 111 Receiving end coil 112 Receiving end capacitor

[0072] 121 Rectifier Circuit 122 Modulation and Demodulation Circuit

[0073] 123 Control Circuit 131 Metal Oxide Semiconductor Field Effect Transistor

[0074] 161 Wired charging interface 211 Transmitter coil

[0075] 212 Transmitter capacitor DETAILED DESCRIPTION

[0076] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0077] Figure 1 FIG. 1 is a block diagram of a wireless charging system according to an exemplary embodiment. Figure 1 The system may include a wireless charging transmitting terminal 2, a power supply 5 and a wireless charging receiving terminal 1, wherein the power supply 5 is connected to the wireless charging transmitting terminal 2.

[0078] like Figure 1 As shown, the wireless charging transmitter 2 may include an energy transmitter 21, a charger 22, a transmission processor 23 and a controller 24, wherein the transmission processor 23 is connected to the energy transmitter 21, the charger 22 and the controller 24 respectively.

[0079] Specifically, if Figure 2 As shown, the energy transmitter 21 may include a transmitting coil 211 and a transmitting capacitor 212, wherein the transmitting processor 23 is connected to the transmitting coil 211 via the transmitting capacitor 212. The transmitting processor 23 may include a full-bridge inverter circuit or a half-bridge inverter circuit, which may be used to convert direct current into alternating current. The controller 24 may be used to control the full-bridge inverter circuit or the half-bridge inverter circuit, and may also be used to modulate wireless transmission signals and demodulate amplitude shift keying (ASK) signals coupled from the transmitting coil 211. The transmitting coil 211 may be used to generate magnetic induction with the receiving coil 111 in the wireless charging receiving end 1 to transmit and receive wireless signals.

[0080] return Figure 1 The wireless charging receiving end 1 may include an energy receiver 11 , a receiving processor 12 and a wireless charging management chip 13 .

[0081] In this disclosure, Figure 2As shown, the energy receiver 11 may include a receiving coil 111 and a receiving capacitor 112. The receiving coil 111 may be connected to the receiving processor 12 via the receiving capacitor 112, and may be used to generate magnetic induction with the energy transmitter 21 (specifically, the transmitting coil 211) of the wireless charging transmitter 2 to transmit and receive wireless signals.

[0082] like Figure 1 As shown, the receiving processor 12 is connected to the energy receiver 11 and the wireless charging management chip 13 respectively, and can be used to convert alternating current into direct current and modulate and demodulate wireless signals.

[0083] Specifically, if Figure 3 As shown, the receiving processor 12 may include a rectifier circuit 121, a modulation and demodulation circuit 122, and a control circuit 123. The rectifier circuit 121 may be used to convert alternating current (AC) to direct current (DC); the modulation and demodulation circuit 122 may be used to modulate and demodulate wireless signals; and the control circuit 123 may be connected to the rectifier circuit 121 and the modulation and demodulation circuit 122, respectively, to control the operation of the rectifier circuit 121 and the modulation and demodulation circuit 122.

[0084] return Figure 1 The wireless charging management chip 13 can be connected to the battery 3 and can be used to control the charging of the battery 3.

[0085] In one embodiment, the wireless charging management chip 13 may include a plurality of metal-oxide-semiconductor field-effect transistors (MOSFE, abbreviated as MOS tube) 131. For example, Figure 4 As shown, the wireless charging management chip 13 is a 3-level charger, wherein the 3-level charger includes five MOS tubes 131 .

[0086] In addition, if Figure 1 As shown, the wireless charging management chip 13 can also be electrically connected to the terminal system to provide power to the system.

[0087] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects: the maximum input voltage allowed by the wireless charging management chip in the wireless charging receiver is higher than the maximum input voltage allowed by the power management chip in related technologies. Therefore, by increasing the input voltage of the wireless charging management chip, charging power and efficiency can be increased, thereby improving the user experience. In addition, the terminal can be quickly charged without the need for an additional wired charging interface, thereby improving the terminal's waterproof performance and safety.

[0088] Figure 5 FIG. 1 is a block diagram of a wireless charging system according to another exemplary embodiment. Figure 5 The above-mentioned receiving processor 12 and wireless charging management chip 13 can be connected to the terminal processor 4 respectively; wherein, the receiving processor 12 can be used to convert AC power into DC power, demodulate the wireless signal received from the above-mentioned energy receiver 11, and modulate the wireless signal sent by the wireless charging management chip 13 via the terminal processor 4.

[0089] Figure 6 FIG. 1 is a block diagram of a wireless charging system according to another exemplary embodiment. Figure 6 The wireless charging receiving terminal 1 may also include a temperature acquisition element 14 (e.g., a chip thermistor, infrared temperature sensor, etc.) for acquiring the terminal temperature, which may be the temperature of the battery 3 or the temperature of the terminal itself. Furthermore, the wireless charging management chip 13 is connected to the temperature acquisition element 14. When the terminal temperature acquired by the temperature acquisition element 14 exceeds a preset temperature threshold, the wireless charging management chip 13 can reduce the current charging current and charge the battery 3 at the reduced current. This protects the battery from overheating, ensuring that the temperature of the battery and the terminal's rear shell does not become excessively high, thus avoiding damage to the battery life. It also reduces the overall temperature of the terminal, ensuring a balanced charging efficiency, charging freedom, and charging speed, and improving the user experience.

[0090] In addition, it should be noted that the above-mentioned preset temperature threshold can be a value set by the user or a default empirical value (for example, 40 degrees), which is not specifically limited in this disclosure.

[0091] In addition, in order to improve the charging efficiency and charging flexibility of the wireless charging receiving terminal 1, Figure 7 As shown, the wireless charging receiving end 1 may further include: a charging control switch 15 and a wired charging management chip 16 .

[0092] In the present disclosure, the charging control switch 15 has one end connected to the receiving processor 12 and the wireless charging management chip 13, and the other end connected to the wired charging management chip 16. In addition, the charging control switch 15 can be a single-pole single-throw switch, a relay, a metal oxide semiconductor field effect transistor (wherein, Figure 7 In the figure, the charging control switch 15 is illustrated as a metal oxide semiconductor field effect transistor).

[0093] The wired charging management chip 16 has one end connected to the wireless charging management chip 13 and the other end connected to the battery 3. The wired charging management chip 16 is provided with a wired charging interface 161. Furthermore, the wired charging management chip 16 can be used to control the charging of the battery 3 when the charging control switch 15 is closed, or when the charging control switch 15 is open and the wired charging interface 161 is occupied.

[0094] In addition, the wireless charging management chip 13 can be used to control the battery 3 to perform wireless charging when the charging control switch 15 is closed, or when the charging control switch 15 is disconnected and the wired charging interface 161 is not occupied. That is, when the charging control switch 15 is closed, the wireless charging management chip 13 and the wired charging management chip 16 simultaneously control the battery 3 to perform wireless charging; when the charging control switch 15 is disconnected and the wired charging interface 161 is occupied, the wired charging management chip 16 controls the battery 3 to perform wired charging, and the wireless charging management chip 13 does not operate; when the charging control switch 15 is disconnected and the wired charging interface 161 is not occupied, the wireless charging management chip 13 controls the battery 3 to perform wireless charging, and the wired charging management chip 16 does not operate.

[0095] For example, the wired charging interface 161 may be a Universal Serial Bus (USB) interface, a Type-C interface, or the like.

[0096] In addition, in the present disclosure, the above-mentioned wireless charging receiving terminal 1 can be set outside the terminal. In this way, when charging is needed, the terminal can be installed on the wireless charging receiving terminal 1 and then placed on the wireless charging transmitting terminal 2 for charging, which undoubtedly increases the complexity of terminal charging.

[0097] In order to simplify the tediousness of terminal charging, in another embodiment, the wireless charging receiving terminal 1 can be set in the terminal. In this way, when charging is needed, the terminal can be directly placed on the wireless charging transmitting terminal 2 for charging, which is convenient and fast.

[0098] In addition, in order to improve the safety of charging, Figure 8 As shown, the wireless charging system may further include a micro switch 6 .

[0099] In the present disclosure, the micro switch 6 can be set on the wireless charging receiving end 1 at a position where it contacts the terminal for charging, and the wireless charging transmitting end 2 is connected to the power supply 5 through the micro switch 6. In this way, when the terminal is placed on the wireless charging receiving end 1, it contacts the micro switch 6, triggering the micro switch 6 to close, turning on the power supply 5, and starting charging. When the terminal leaves the wireless charging transmitting end 2, the micro switch 6 opens, disconnecting the power supply 5, and stopping charging.

[0100] The present disclosure also provides a terminal, wherein the terminal may include a battery 3, a terminal processor 4 and the above-mentioned wireless charging receiving terminal 1.

[0101] Figure 9 FIG. 1 is a flow chart showing a wireless charging method according to an exemplary embodiment. Figure 9 As shown, the wireless charging method may include the following steps.

[0102] In step 901, an AC power signal sent by a wireless charging transmitter is received.

[0103] In step 902, the AC power signal is converted into DC power.

[0104] In step 903, the battery is controlled to be charged using direct current.

[0105] Specifically, if Figure 10 As shown, step 903 may include the following steps 9031 to 9035.

[0106] In step 9031, the voltage and current capability information of the charger is obtained.

[0107] In the present disclosure, the voltage and current capability information may include fixed power data object (Power Data Object, PDO) information and augmented power data object (Augmented Power Data Object, APDO) information. For example, the fixed PDO information may be 5V / 3A, 9V / 2A, 12V / 1.5A, etc. APDO information may represent programmable voltage and current information, such as 3-5.9V / 3A, etc. The wireless charging management chip may obtain the above-mentioned voltage and current capability information through the charger in the wireless charging transmitting end. Specifically, in one embodiment, after the wireless charging transmitting end and the wireless charging receiving end establish a connection, the charger may send its own voltage and current capability information to the wireless charging receiving end, and the wireless charging receiving end receives the voltage and current capability information of the charger, so that the wireless charging management chip obtains the voltage and current capability information of the charger.

[0108] In another embodiment, after the wireless charging transmitter and the wireless charging receiver establish a connection, the wireless charging receiver sends a request message to the charger in the wireless charging transmitter to obtain the voltage and current capability information of the charger. After receiving the request message, the charger sends its own voltage and current capability information to the wireless charging receiver. The wireless charging receiver receives the voltage and current capability information of the charger. In this way, the wireless charging management chip obtains the voltage and current capability information of the charger.

[0109] In step 9032, the current battery voltage of the terminal is obtained.

[0110] In step 9033, the input voltage threshold of the wireless charging management chip is determined based on the voltage and current capability information of the charger.

[0111] In step 9034 , a voltage value corresponding to the voltage range to which the input voltage threshold belongs is determined as the target charging voltage of the battery.

[0112] In the present disclosure, after obtaining the voltage and current capability information of the charger through the above step 9031, the input voltage threshold Vrect of the wireless charging management chip can be determined based on it; thereafter, the voltage value corresponding to the voltage range to which the input voltage threshold belongs can be determined as the target charging voltage of the battery, and the higher the lower limit value of the above voltage range, the smaller the voltage value corresponding to the voltage range.

[0113] In one embodiment, the target charging voltage can be determined by a pre-stored correspondence between voltage ranges and voltage values. Thus, after obtaining the input voltage threshold Vrect of the wireless charging management chip, the voltage range to which the input voltage threshold Vrect belongs can be determined first. Then, the voltage value corresponding to the voltage range to which the input voltage threshold Vrect belongs can be determined by using the pre-stored correspondence between voltage ranges and voltage values, and this corresponding voltage value is determined as the target charging voltage of the battery.

[0114] In another embodiment, the target charging voltage may be determined by:

[0115] When 5V≤Vrect<10V, the corresponding voltage value is the difference between the input voltage threshold Vrect and the preset voltage value; when 10V≤Vrect<15V, the corresponding voltage value is the difference between Vrect / 2 and the above-mentioned preset voltage value; when 15V≤Vrect<20V, the corresponding voltage value is the difference between Vrect / 3 and the above-mentioned preset voltage value; when Vrect≥20V, the corresponding voltage value is the difference between Vrect / N and the above-mentioned preset voltage value; wherein the above-mentioned preset voltage value is greater than zero and less than Vrect / N, and N is an integer greater than or equal to 4.

[0116] In addition, it should be noted that the above-mentioned preset voltage value can be a value set by the user or a default empirical value, which is not specifically limited in the present disclosure.

[0117] In step 9035, the target charging current of the battery is determined according to the current battery voltage, and the battery is charged according to the target charging voltage and target charging current.

[0118] In the present disclosure, different target charging currents IBAT can be set according to different current battery voltages VBAT. Figure 11 As shown, the above step 9035 may include the following steps 90351 to 90359.

[0119] In step 90351, it is determined whether the current battery voltage is greater than or equal to a first preset voltage threshold.

[0120] In the present disclosure, after obtaining the current battery voltage of the terminal through the above step 9032, it can be first determined whether it is greater than or equal to the above first preset voltage threshold (for example, 2.5V). When the current battery voltage is greater than or equal to the above first preset voltage threshold, it can be further determined whether the current battery voltage is less than the second preset voltage threshold (for example, 4.4V), that is, the following step 90352 is executed; when the current battery voltage is less than the above first preset voltage threshold, it can enter the trickle charging stage. At this time, the charging current value corresponding to the trickle charging stage (for example, 45mA) can be determined as the target charging current of the battery. Thereafter, the battery is trickle charged according to the target charging current and the target charging voltage determined in the above step 9034, that is, the following step 90359 is executed.

[0121] In addition, it should be noted that the above-mentioned first preset voltage threshold is smaller than the above-mentioned second preset voltage threshold, and the above-mentioned first preset voltage threshold, the second preset voltage threshold and the above-mentioned charging current value corresponding to the trickle charging stage can all be user-set values or default empirical values, and are not specifically limited in this disclosure.

[0122] In step 90352, it is determined whether the current battery voltage is less than a second preset voltage threshold.

[0123] In the present disclosure, when the current battery voltage is greater than or equal to the above-mentioned first preset voltage threshold and less than the above-mentioned second preset voltage threshold, the constant current charging stage can be entered. At this time, the target charging current of the battery can be determined according to the current battery voltage, and the battery can be charged with constant current according to the target charging current and the target charging voltage determined in the above step 904, that is, the following step 90353 is executed; and when the current battery voltage is greater than or equal to the above-mentioned second preset voltage threshold, the current charging current can be reduced to obtain a new target charging current, and when the new target charging current is greater than or equal to the preset charging current threshold, the battery can be charged with constant current according to the new target charging current and the target charging voltage determined in the above step 9034, that is, the following steps 90355 to 90357 are executed.

[0124] In step 90353, the target charging current of the battery is determined according to the current battery voltage, and constant current charging is performed on the battery according to the target charging voltage and target charging current.

[0125] In the present disclosure, the constant current charging process may include a pre-charging stage, a first stage constant current charging, and a second stage constant current charging. Specifically:

[0126] (1) When the current battery voltage is greater than or equal to the first preset voltage threshold and less than a third preset voltage (e.g., 3.0 V), the pre-charging stage may be entered. At this time, a preset first current (e.g., 150 mA) is determined as the target charging current of the battery, and constant current charging (i.e., pre-charging) is performed on the battery according to the target charging voltage and the target charging current determined in step 9034.

[0127] (2) When the current battery voltage is greater than or equal to the third preset voltage threshold and less than the fourth preset voltage threshold (e.g., 3.6V), the first stage of constant current charging can be entered. At this time, the preset second current (e.g., 1A) can be determined as the target charging current of the battery, and the battery is charged with constant current according to the target charging voltage and the target charging current determined in step 9034 (i.e., the first stage of constant current charging is performed);

[0128] (3) When the current battery voltage is greater than or equal to the fourth preset voltage threshold and less than the second preset voltage threshold, the second stage constant current charging can be entered. At this time, the preset third current can be determined as the target charging current of the battery, and the battery can be charged with constant current according to the target charging voltage and the target charging current determined in step 9034 (i.e., the second stage constant current charging is performed).

[0129] In the present disclosure, the third current may be set according to the battery cell specification. For example, the third current may be 1C or 1.5C (for example, if the battery capacity is 1800 mA, then 1C=1800 mA and 1.5C=2700 mA).

[0130] In addition, it should be noted that the second current is greater than the first current, and the third current is greater than the second current. Moreover, the first current and the second current can be user-set values or default empirical values, which are not specifically limited in this disclosure.

[0131] In step 90354, it is determined whether the current battery voltage has risen to a second preset voltage threshold.

[0132] During constant current charging, if the current battery voltage rises to the above-mentioned second preset voltage threshold, the current charging current can be reduced to obtain a new target charging current, and when the new target charging current is greater than or equal to the preset charging current threshold (for example, 1A), the battery is charged with constant current according to the new target charging current and the target charging voltage determined in the above step 9034, that is, the following steps 90355 to 90357 are executed; thereafter, the above step 90354 is returned to continue execution until the above-mentioned new target charging current is less than the above-mentioned preset charging current threshold.

[0133] If the current battery voltage has not risen to the second preset voltage threshold, continue to perform constant current charging for the battery according to the target charging current determined in step 90353 and the target charging voltage determined in step 9034, and at the same time determine whether the current battery voltage has risen to the second preset voltage threshold.

[0134] In addition, it should be noted that the above-mentioned preset charging current threshold can be a value set by the user or a default empirical value, which is not specifically limited in this disclosure.

[0135] In step 90355, the current charging current is reduced to obtain a new target charging current.

[0136] In one embodiment, the current charging current may be reduced by a preset current threshold, wherein the preset current threshold may be a value set by the user or a default empirical value, which is not specifically limited in the present disclosure.

[0137] In another embodiment, the current charging current may be reduced by a preset ratio (eg, 25%), wherein the preset ratio may be a value set by the user or a default empirical value, which is not specifically limited in the present disclosure.

[0138] In step 90356, it is determined whether the new target charging current is greater than or equal to a preset charging current threshold.

[0139] In the present disclosure, when the new target charging current is greater than or equal to the above-mentioned preset charging current threshold, the battery can be charged with constant current according to the new target charging current and the target charging voltage determined in the above-mentioned step 9034, that is, the following step 90357 is executed; when the new target charging current is greater than or equal to the above-mentioned preset charging current threshold, in order to prevent overcharging, the constant current charging can be stopped and the constant voltage charging stage can be entered. At this time, the battery can be charged with constant voltage according to the new target charging current and the target charging voltage determined in the above-mentioned step 9034, that is, the following step 90358 is executed.

[0140] In step 90357, constant current charging is performed for the battery according to the target charging voltage and the new target charging current.

[0141] In step 90358, constant voltage charging is performed for the battery according to the target charging voltage and the new target charging current.

[0142] In the present disclosure, during the constant voltage charging process, charging is performed in a manner that keeps the charging voltage substantially unchanged and the charging current gradually decreases, and charging can be stopped when the charging current is less than a preset charging cut-off current (e.g., 200 mA).

[0143] In addition, it should be noted that the above preset charging cut-off current can be a value set by the user or a default empirical value, and is not specifically limited in the present disclosure.

[0144] In step 90359, the charging current value corresponding to the trickle charging stage is determined as the target charging current of the battery, and trickle charging is performed for the battery according to the target charging voltage and the target charging current.

[0145] Exemplarily, different target charging currents IBAT can be set in the following manner:

[0146] Trickle charging stage: VBAT < 2.5V, the target charging current IBAT is set to 45 mA;

[0147] Pre-charging stage: 2.5V ≤ VBAT ≤ 3.0V, the target charging current IBAT is set to 150 mA;

[0148] First-stage constant current charging: 3.0V < VBAT < 3.6V, the target charging current IBAT is set to 1A;

[0149] Second-stage constant current charging: When 3.6V ≤ VBAT < 4.4V, the target charging current IBAT can be set according to the battery cell specification (e.g., 1C, 1.5C, etc.).

[0150] Third-stage stepped charging: When VBAT first reaches 4.4V, the target charging current IBAT is reduced by 25%, and the second-stage constant current charging continues; when VBAT reaches 4.4V for the second time, the target charging current IBAT is further reduced by 25%, and the second-stage constant current charging continues; when the target charging current IBAT < 1A, the third-stage stepped charging stops and constant voltage charging starts.

[0151] Fourth-stage constant voltage charging: When the target charging current IBAT is less than 200 mA, charging stops.

[0152] In addition, it should be noted that the above step 9032 can be performed before the above step 9031, or after the above step 9031, or simultaneously with the above step 9031, which is not specifically limited in this disclosure.

[0153] In addition, in order to ensure charging safety, wireless charging authorization authentication can be performed before the above step 9031. Specifically, Figure 12 As shown, the above method may further include the following steps 9036 to 9038.

[0154] In step 9036, wireless charging authorization verification is performed with the wireless charging transmitter.

[0155] Since the specific method of wireless charging authorization verification is well known to those skilled in the art, it will not be described in detail in this disclosure.

[0156] In step 9037 , it is determined whether the wireless charging authorization verification is successful.

[0157] In the present disclosure, when the wireless charging authorization verification is successful, the battery can be quickly wirelessly charged, that is, the above steps 9031 to 9035 are executed; when the wireless charging authorization verification fails, ordinary wireless charging can be performed, that is, the following step 9038 is executed.

[0158] In step 9038, the battery is charged according to the preset voltage and preset current.

[0159] For example, the preset voltage is 5V, and the preset current is 1A.

[0160] It should be noted that the above-mentioned preset voltage and preset current can be values set by the user or default empirical values, and are not specifically limited in this disclosure.

[0161] In addition, before performing wireless charging authorization verification, the following steps need to be performed: when the wireless charging transmitter is connected to a power source, the wireless charging transmitter detects the type of charger, where the charger type can be an ordinary DCP charger, QC2.0 charger, QC3.0 charger, QC4.0 charger, PD charger, etc.; afterwards, when the wireless charging transmitter and the wireless charging receiver establish a connection (for example, after placing a terminal with a built-in wireless charging receiver on the wireless charging transmitter), the terminal and the wireless charging transmitter use QI specification protocols (for example, BPP protocol and EPP protocol) to interact.

[0162] In addition, the above method may also include the following steps: when it is detected that the charging control switch is disconnected and the wired charging interface is occupied, controlling the battery to perform wired charging through the wired charging management chip; when it is detected that the charging control switch is disconnected and the wired charging interface is not occupied, controlling the battery to perform wireless charging through the wireless charging management chip; when it is detected that the charging control switch is closed, controlling the battery to perform wireless charging through the wireless charging management chip and the wired charging management chip.

[0163] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0164] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A wireless charging method, characterized in that: The method comprises: Receive the AC power signal sent by the wireless charging transmitter; converting the AC power signal into DC power; Using the direct current, controlling the battery to charge; The controlling the battery to charge includes: Get the voltage and current capability information of the charger; Get the current battery voltage of the terminal; Determining an input voltage threshold of the wireless charging management chip according to the voltage and current capability information; determining a voltage value corresponding to the voltage range to which the input voltage threshold belongs as a target charging voltage of the battery, wherein the higher the lower limit value of the voltage range to which the input voltage threshold belongs, the smaller the voltage value corresponding to the voltage range to which the input voltage threshold belongs; Determining a target charging current for the battery according to the current battery voltage, and charging the battery according to the target charging voltage and the target charging current; The step of determining a voltage value corresponding to a voltage range to which the input voltage threshold belongs as a target charging voltage of the battery includes: Determining a voltage range to which the input voltage threshold belongs; determining a voltage value corresponding to the voltage range to which the input voltage threshold belongs based on a pre-stored correspondence between voltage ranges and voltage values, and determining the voltage value corresponding to the voltage range to which the input voltage threshold belongs as the target charging voltage; or when , the target charging voltage is the difference between the input voltage threshold and the preset voltage value, wherein, Vrect is the input voltage threshold; when , the target charging voltage is Vrect / 2 and the difference between the preset voltage value; when When the target charging voltage is Vrect / 3 and the difference between the preset voltage value; when When the target charging voltage is Vrect / N and the preset voltage value; wherein the preset voltage value is greater than zero and less than Vrect / N, where N is an integer greater than or equal to 4.

2. The method according to claim 1, characterized in that The determining a target charging current of the battery according to the current battery voltage, and charging the battery according to the target charging voltage and the target charging current, includes: When the current battery voltage is greater than or equal to a first preset voltage threshold and less than a second preset voltage threshold, determining a target charging current for the battery according to the current battery voltage, and performing constant current charging for the battery according to the target charging voltage and the target charging current; Repeating the steps of reducing the current charging current to obtain a new target charging current if the current battery voltage rises to the second preset voltage threshold during the constant current charging process, and when the new target charging current is greater than or equal to the preset charging current threshold, performing constant current charging for the battery according to the target charging voltage and the new target charging current, until the new target charging current is less than the charging current threshold; When the new target charging current is less than the charging current threshold, constant voltage charging is performed on the battery according to the target charging voltage and the new target charging current.

3. The method according to claim 1 or 2, characterized in that The method further comprises: When it is detected that the charging control switch is disconnected and the wired charging interface is occupied, the wired charging management chip controls the battery to perform wired charging; When it is detected that the charging control switch is disconnected and the wired charging interface is not occupied, controlling the battery to be wirelessly charged through the wireless charging management chip; When it is detected that the charging control switch is closed, the battery is controlled to be wirelessly charged through the wireless charging management chip and the wired charging management chip.

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