Terminal and wireless charging device, charging method and computer readable storage medium

Abstract

The present invention discloses a terminal and its wireless charging device, charging method and computer-readable storage medium, wherein the method comprises: determining that the charging mode of the terminal is a wireless fast charging direct charging mode, obtaining the working state of a wireless chip in the terminal; when the working state is a half-bridge state, first setting the target output voltage of the wireless chip to a first voltage, and when the energy control error of the wireless chip meets a preset condition, gradually reducing the target output voltage until the target output voltage reaches a second voltage; when the working state is a full-bridge state, directly and gradually reducing the target output voltage of the wireless chip until the target output voltage reaches the second voltage. When the terminal is in the wireless fast charging direct charging mode, the method performs different step-down controls according to the current working state of the wireless chip, thereby adjusting the actual output voltage of the wireless chip, and can realize wireless direct charging without a charge pump chip, reducing the application cost.

Description

Technical Field

[0001] The present invention relates to the field of wireless charging technology, and in particular to a wireless charging method for a terminal, a computer-readable storage medium, a terminal, and a wireless charging device for the terminal. Background Art

[0002] When the terminal device charges the battery in wireless fast charging mode through the wireless chip, the wireless chip and the battery need to be connected through a charge pump chip, and the charge pump chip is used to achieve stable boost or buck operation on the output voltage of the wireless chip. Taking a dual-cell battery as an example, the voltage of the dual-cell series connection is in the order of 8V, but the output voltage of the wireless chip can reach 20V. Therefore, the charge pump chip is needed to reduce the output voltage of the wireless chip to a voltage value that matches the battery voltage, so as to quickly charge the battery. However, the price of the charge pump chip is relatively high, which increases the application cost of wireless fast charging and is not suitable for mid- and low-end terminal devices. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present invention is to propose a wireless charging method for a terminal, which performs different voltage reduction controls according to the current working state of the wireless chip when the terminal is in a wireless fast charging direct charging mode, thereby adjusting the actual output voltage of the wireless chip, realizing wireless direct charging without a charge pump chip, and reducing the application cost.

[0004] A second object of the present invention is to provide a computer-readable storage medium.

[0005] The third objective of the present invention is to provide a terminal.

[0006] A fourth objective of the present invention is to provide a wireless charging device for a terminal.

[0007] To achieve the above-mentioned purpose, the first embodiment of the present invention proposes a wireless charging method for a terminal, including: determining that the charging mode of the terminal is a wireless fast charging direct charging mode, and obtaining the working state of a wireless chip in the terminal; when the working state is a half-bridge state, first setting the target output voltage of the wireless chip to a first voltage, and when the energy control error of the wireless chip meets a preset condition, gradually reducing the target output voltage until the target output voltage reaches a second voltage; when the working state is a full-bridge state, directly and gradually reducing the target output voltage of the wireless chip until the target output voltage reaches the second voltage.

[0008] According to the wireless charging method of the terminal of the embodiment of the present invention, first determine that the charging mode of the terminal is the wireless fast charging direct charging mode, obtain the working state of the wireless chip in the terminal, and when the working state is the half-bridge state, first set the target output voltage of the wireless chip to the first voltage, and when the energy control error of the wireless chip meets the preset conditions, then gradually reduce the target output voltage until the target output voltage reaches the second voltage; when the working state is the full-bridge state, directly and gradually reduce the target output voltage of the wireless chip until the target output voltage reaches the second voltage. When the terminal is in the wireless fast charging direct charging mode, this method performs different step-down controls according to the current working state of the wireless chip, thereby adjusting the actual output voltage of the wireless chip, which can realize wireless direct charging without the charge pump chip, and reduce the application cost.

[0009] In addition, the wireless charging method for a terminal according to the above embodiment of the present invention may also have the following additional technical features:

[0010] According to one embodiment of the present invention, the adapter connected to the wireless charging base has a type, and the method for determining the wireless fast charging direct charging mode includes at least one of the following: when the type is a fast charging type and the wireless fast charging direct charging path of the terminal does not have a charge pump chip, the charging mode of the terminal is the wireless fast charging direct charging mode; when the type is a fast charging type, the wireless fast charging direct charging path of the terminal has a charge pump chip, and the inductance of the terminal is less than the first inductance and the inductance of the wireless charging base is greater than the second inductance, the charging mode of the terminal is the wireless fast charging direct charging mode.

[0011] According to one embodiment of the present invention, before obtaining the working status of the wireless chip in the terminal, the wireless charging method of the terminal also includes: determining the fast charging curve corresponding to the wireless fast charging direct charging mode, and controlling the wireless general charging path of the terminal to be turned on; setting the target output current of the wireless chip to the first current, and setting the mode of the register of the charge pump chip to the direct charging mode, and setting the target output voltage of the wireless chip to the first voltage.

[0012] According to one embodiment of the present invention, after setting the target output voltage of the wireless chip to the first voltage, the wireless charging method of the terminal further includes: obtaining the maximum allowable power of the adapter; and when the maximum allowable power is obtained, obtaining the working state of the wireless chip in the terminal.

[0013] According to one embodiment of the present invention, the wireless charging method of the terminal further includes: determining the target output current of the wireless chip according to the maximum allowable power of the adapter, the maximum allowable power of the terminal, and the fast charging curve.

[0014] According to one embodiment of the present invention, when the target output voltage reaches the second voltage and the energy control error of the wireless chip meets the preset conditions, the wireless charging method of the terminal also includes: controlling the wireless fast charging direct charging path of the terminal to be turned on; obtaining the current deviation between the target output current and the actual output current of the wireless chip; and setting the target output voltage of the wireless chip according to the current deviation when the energy control error of the wireless chip meets the preset conditions.

[0015] According to an embodiment of the present invention, the current deviation has a sign, and setting the target output voltage of the wireless chip according to the current deviation includes: determining the adjustment direction of the target output voltage according to the sign of the current deviation; and determining the adjustment amplitude of the target output voltage according to the magnitude of the current deviation.

[0016] According to an embodiment of the present invention, the magnitude of the current deviation is positively correlated with the adjustment amplitude of the target output voltage.

[0017] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium on which a wireless charging program for a terminal is stored. When the wireless charging program for the terminal is executed by a processor, the wireless charging method for the terminal is implemented.

[0018] According to the computer-readable storage medium of an embodiment of the present invention, based on the wireless charging method of the terminal mentioned above, when the terminal is in the wireless fast charging direct charging mode, different voltage reduction controls are performed according to the current working state of the wireless chip to adjust the actual output voltage of the wireless chip, thereby realizing wireless direct charging without the charge pump chip.

[0019] To achieve the above objectives, the third aspect of the present invention proposes a terminal, comprising: a memory, a processor, and a wireless charging program for the terminal stored in the memory and executable on the processor. When the processor executes the program, the above-mentioned wireless charging method for the terminal is implemented.

[0020] According to the terminal of an embodiment of the present invention, based on the wireless charging method of the terminal mentioned above, when the terminal is in the wireless fast charging direct charging mode, different voltage reduction controls are performed according to the current working state of the wireless chip, thereby adjusting the actual output voltage of the wireless chip, thereby realizing wireless direct charging without the charge pump chip, and reducing the application cost.

[0021] To achieve the above-mentioned purpose, the fourth aspect of the present invention proposes a wireless charging device for a terminal, which includes: an acquisition module, used to determine that the charging mode of the terminal is a wireless fast charging direct charging mode, and to obtain the working state of a wireless chip in the terminal; a charging control module, used to first set the target output voltage of the wireless chip to a first voltage when the working state is a half-bridge state, and when the energy control error of the wireless chip meets a preset condition, gradually reduce the target output voltage until the target output voltage reaches a second voltage; and, when the working state is a full-bridge state, directly and gradually reduce the target output voltage of the wireless chip until the target output voltage reaches the second voltage.

[0022] According to the wireless charging device of the terminal of the embodiment of the present invention, the charging mode of the terminal is determined to be the wireless fast charging direct charging mode through the acquisition module, and the working state of the wireless chip in the terminal is acquired. When the working state is the half-bridge state, the charging control module first sets the target output voltage of the wireless chip to the first voltage, and when the energy control error of the wireless chip meets the preset conditions, the target output voltage is gradually reduced until the target output voltage reaches the second voltage, and when the working state is the full-bridge state, the charging control module directly and gradually reduces the target output voltage of the wireless chip until the target output voltage reaches the second voltage. Therefore, when the terminal is in the wireless fast charging direct charging mode, the device performs different step-down controls according to the current working state of the wireless chip, thereby adjusting the actual output voltage of the wireless chip, and wireless direct charging without the charge pump chip can be realized, reducing the application cost of wireless charging.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a flowchart of a wireless charging method for a terminal according to an embodiment of the present invention;

[0025] Figure 2 A wireless charging circuit diagram of a terminal according to an embodiment of the present invention;

[0026] Figure 3 A wireless charging circuit diagram of a terminal according to another embodiment of the present invention;

[0027] Figure 4 is a flowchart of a wireless charging method for a terminal according to a specific embodiment of the present invention;

[0028] Figure 5 for Figure 4 Flow chart of the current regulation method;

[0029] Figure 6 is a block diagram of a terminal according to an embodiment of the present invention;

[0030] Figure 7 FIG. 4 is a block diagram of a wireless charging device for a terminal according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] The following describes a wireless charging method for a terminal, a computer-readable storage medium, a terminal, and a wireless charging device for a terminal provided in embodiments of the present invention with reference to the accompanying drawings.

[0033] Figure 1 Flowchart of a wireless charging method for a terminal according to an embodiment of the present invention. The terminal may be a mobile phone, a wireless headset, or other device that can be charged by wireless charging, which is not limited here. The following takes a mobile phone as an example to describe the wireless charging method for a terminal of the present invention in detail.

[0034] like Figure 1 As shown, the wireless charging method of the terminal in the embodiment of the present invention includes:

[0035] S1, determining that the charging mode of the terminal is the wireless fast charging direct charging mode, and obtaining the working status of the wireless chip in the terminal;

[0036] S2, when the working state is the half-bridge state, first set the target output voltage VOUT of the wireless chip to the first voltage V1, and when the energy control error of the wireless chip meets the preset condition, gradually reduce the target output voltage VOUT until the target output voltage VOUT reaches the second voltage V2;

[0037] S3, when the working state is the full-bridge state, directly and gradually reduce the target output voltage VOUT of the wireless chip until the target output voltage VOUT reaches the second voltage V2. The first voltage V1 and the second voltage V2 can be set according to actual conditions, and the first voltage V1 is greater than the second voltage V2.

[0038] Specifically, when the mobile phone is placed on the wireless charging base and connected to the wireless charging base, wireless charging is performed. When it is confirmed that the mobile phone is in the wireless fast charging direct charging mode, the working state of the wireless chip in the current mobile phone is obtained to determine whether the working state of the wireless chip is switched from the half-bridge state to the full-bridge state.

[0039] If the working mode of the wireless chip is still in the half-bridge state, the first voltage V1 is used as the target output voltage VOUT of the wireless chip. The wireless chip updates the power transmission table according to the reset target output voltage VOUT and sends it to the wireless charging base. The wireless charging base receives the updated power transmission table and changes the electromagnetic inductance energy. The wireless chip receives the electromagnetic inductance energy emitted by the wireless charging base in real time and determines whether the electromagnetic inductance energy currently emitted by the wireless charging base meets the requirements. The following takes the energy control error CEP (Control error packet, providing control error to adjust the primary current) of the wireless chip returning to zero as an example of a preset condition. When the wireless chip determines that the CEP is zero, it determines that the current energy control error meets the preset condition, and then gradually reduces the target output voltage VOUT from the first voltage V1 to the second voltage V2 by the preset voltage △V. It can be understood that each step-down process of the above-mentioned target output voltage VOUT should determine whether CEP is zero. When it is determined that CEP is zero, the target output voltage VOUT is reduced by △V. If the target output voltage VOUT after the step-down is still greater than the second voltage V2, then after CEP is zero, the step-down operation of △V is performed again until the target output voltage VOUT of the wireless chip is equal to the second voltage V2. In addition, the judgment of whether the above-mentioned CEP is zero can be judged by whether the actual output voltage vout of the wireless chip reaches the target output voltage VOUT of the wireless chip. When the actual output voltage vout of the wireless chip is equal to the target output voltage VOUT, it is determined that CEP is equal to zero, and the wireless charging base has completed the corresponding regulation. If the actual output voltage vout of the wireless chip is still greater than the target output voltage VOUT, the wireless chip can feed back the voltage difference to the wireless charging base, and the wireless charging base will adjust again according to the voltage difference until the actual output voltage vout of the wireless chip is equal to VOUT.

[0040] If the current working state of the wireless chip has been switched to the full-bridge state, the target output voltage VOUT of the wireless chip is directly reduced to the second voltage V2 through a preset program. When the mobile phone is in the wireless fast charging direct charging mode, the method performs different voltage reduction controls according to the current working state of the wireless chip, thereby adjusting the actual output voltage of the wireless chip, and the second voltage V2 can be set to a voltage value that matches the battery voltage. At this time, when the target output voltage of the wireless chip is reduced to the second voltage V2, it can be directly used for wireless charging of the battery. Therefore, this method can be directly applied to the charging circuit in which the wireless chip is directly connected to the battery, realizing wireless fast charging and direct charging without the charge pump chip, reducing the application cost of wireless charging, and reducing the impact on terminal costs.

[0041] It is understandable that the above preset conditions, the first voltage V1 and the second voltage V2 can be set according to actual conditions. For example, the first voltage V1 can be 12V, and the second voltage V2 can be the battery voltage plus a certain voltage margin. There is no limitation here.

[0042] In one embodiment of the present invention, the adapter connected to the wireless charging base has a type, and the method for determining the wireless fast charging direct charging mode includes at least one of the following: when the type is a fast charging type and the wireless fast charging direct charging path of the terminal does not have a charge pump chip, the charging mode of the terminal is a wireless fast charging direct charging mode; when the type is a fast charging type, the wireless fast charging direct charging path of the terminal has a charge pump chip, and the inductance Ha of the terminal is less than the first inductance H1 and the inductance Hb of the wireless charging base is greater than the second inductance H2, the charging mode of the terminal is a wireless fast charging direct charging mode. Among them, the first inductance H1 and the second inductance H2 can be set according to actual conditions.

[0043] Specifically, the connection mode of wireless charging is mobile phone-wireless charging base-adapter. When the mobile phone is connected to the wireless charging base, the mobile phone has not yet identified the type of adapter. At this time, the mobile phone sends a private command A to inquire about the type of adapter connected to the wireless charging base, inquiring once every 1 second, and judging whether the mobile phone receives a reply from the wireless charging base within 5 seconds. If the mobile phone receives a reply from the wireless charging base within 5 seconds, it is confirmed that the adapter currently connected to the wireless charging base is a fast charging adapter. If the mobile phone does not receive a reply from the wireless charging base within 5 seconds, it is considered that the adapter currently connected to the wireless charging base is not a fast charging adapter, and the mobile phone performs wireless charging in the bpp power 5W mode supported by the QI wireless fast charging protocol.

[0044] When the mobile phone receives a reply from the wireless charging base within 5 seconds and confirms that the adapter is a fast charging adapter, it determines whether the mobile phone has a charge pump chip. It should be noted that the mobile phone has completed the corresponding chip configuration before leaving the factory and stored the corresponding data of the internal chip. Therefore, the internal storage data of the mobile phone can be directly queried to determine whether the mobile phone is equipped with a charge pump chip. When it is determined through data query that the mobile phone does not have a charge pump chip, the mobile phone is controlled to charge in wireless fast charging direct charging mode.

[0045] In addition, with the development of wireless low-inductance technology, the inductance of the receiving coil used by the wireless chip is about 1 / 3 of the traditional high-inductance solution. Under the same conditions, the loss of the receiving coil can be reduced to more than half of the traditional coil. At the same time, the temperature of the low-inductance technical solution is also lower, which can better avoid the problem of coil current saturation caused by strong magnetic fields and heat accumulation at both ends of the transmitting coil and the receiving coil. However, when the mobile phone is low-inductance and connected to the original high-inductance wireless charging chip, the energy cannot be well coupled, which will cause the output voltage of the wireless chip to fail to rise to the reference voltage value. Therefore, for mobile phones with charge pump chips, the charge chip is controlled to execute a 1:1 wireless fast charging direct charging mode. Specifically, when it is determined that the mobile phone has a charge pump chip, it is further determined whether the current mobile phone has low inductance and whether the currently connected wireless charging base has high inductance. For example, assuming that the first inductance is H1 and the second inductance is H2, the obtained mobile phone inductance Ha is first compared with the first inductance H1. If Ha is less than H1, it is determined that the mobile phone has low inductance. At the same time, the inductance Hb of the wireless charging base is determined by obtaining the ID (Identity document) of the wireless charging base, and the inductance Hb of the wireless charging base is compared with H2. If Hb is greater than H2, it is determined that the wireless charging base has high inductance. At this time, it is confirmed that the low-inductance mobile phone is connected to the high-inductance wireless charging base, and the mobile phone is controlled to charge in the wireless fast charging direct charging mode.

[0046] It should be noted that after confirming that the adapter is a fast charging adapter and the mobile phone has a charge pump chip, when it is determined that the mobile phone is not low inductance but the wireless charging base is high inductance, or the mobile phone is low inductance but the wireless charging base is not high inductance, or the mobile phone is not low inductance and the wireless charging base is not high inductance, the mobile phone is controlled to charge in the charge pump mode of wireless fast charging, that is, the voltage output by the wireless chip is boosted or bucked by the charge pump to meet the battery charging requirements. For example, when the inductance Ha of the mobile phone is greater than or equal to the first inductance H1, or the inductance Hb of the wireless charging base is less than or equal to the second inductance H2, assuming that the wireless chip outputs 16.2V*3A=60W, the battery voltage is 8V, then the current is 6A, and the charge pump chip is controlled to work in a 4:2 mode for wireless charging.

[0047] Based on the above embodiment, the wireless fast charging direct charging mode of the mobile phone is determined, and when the mobile phone is charged in the wireless fast charging direct charging mode, the working status of the wireless chip in the mobile phone is obtained.

[0048] According to an embodiment of the present invention, before obtaining the working state of the wireless chip in the terminal, the wireless charging method of the terminal also includes: determining the fast charging curve corresponding to the wireless fast charging direct charging mode, and controlling the wireless general charging path of the terminal to be turned on; setting the target output current IOUT of the wireless chip to the first current I1, and setting the mode of the register of the charge pump chip to the direct charging mode, and setting the target output voltage VOUT of the wireless chip to the first voltage V1. Among them, the first current I1 and the first voltage V1 can be set according to actual conditions, for example, the first current I1 can be 300ma, and the first voltage V1 can be 12V.

[0049] Specifically, when it is determined that the mobile phone is charging in the wireless fast charging direct charging mode, the fast charging curve corresponding to the wireless fast charging direct charging mode is obtained. The fast charging curve is the correspondence between the battery voltage and the charging current of the mobile phone. It is composed of multiple sets of battery voltage-charging current data, which are connected to form a smooth curve as the fast charging curve. For example, when the battery voltage of the mobile phone is 4.184v, the charging current is 2A; when the battery voltage is 4.242v, the charging current is 2.5A.

[0050] In addition, for mobile phones that do not have a charge pump chip, Figure 2 As shown, a MOS tube 5 (Metal-Oxide-Semiconductor Field-Effect Transistor) is provided on the power supply path directly connecting the wireless chip 1 in the mobile phone and the battery 4. The charging path between the wireless chip 1 and the battery 4 can be controlled by controlling the on-off of the MOS tube 5. Figure 3 As shown, for a mobile phone with a charge pump chip 6, the wireless chip 1 is connected to the battery 4 through the charge pump chip 6. When it is determined that the mobile phone is charged in the wireless fast charging direct charging mode, the mobile phone is first controlled to charge in the wireless general charging channel. For example, when the charging circuit in the mobile phone is Figure 2 As shown, the control MOS tube 5 is in the cut-off state, and the control load card tube 2 is closed. At this time, the wireless general charging channel composed of the wireless chip 1-load switch 2-BUCK circuit 3-battery 4 is turned on. Figure 3 When the MOS tube in the charge pump chip 6 is controlled to be in the cut-off state, the charging path of the wireless chip 1-charge pump chip 6-battery 4 is cut off, and the load switch 2 is controlled to be closed at the same time, and the mobile phone is charged through the wireless general charging channel composed of the wireless chip 1-load switch 2-BUCK circuit 3-battery 4.

[0051] For the wireless charging technology solutions with low inductance for mobile phones and high inductance for wireless charging bases, due to the different coupling energies of electromagnetic induction of different wireless charging bases, at the moment of turning on the voltage regulator in the wireless chip, if the input voltage of the voltage regulator is greater than the output voltage of the voltage regulator, the output voltage of the voltage regulator will be larger. According to the test, 300ma is determined to be a reasonable current value, so the first current can be set to 300ma. When the wireless general charging path of the mobile phone is turned on, the target output current IOUT of the wireless chip is set to 300ma, and the mode of the register of the charge pump chip is set to the direct charging mode, and the target output voltage VOUT of the wireless chip is set to the first voltage V1.

[0052] It should be noted that the above direct charging mode is set for mobile phones equipped with charge pump chips. If the mobile phone does not have a charge pump chip, no processing will be performed.

[0053] Furthermore, when wireless charging starts, the working state of the wireless chip is a half-bridge state. Since the energy loss of the wireless chip in the half-bridge state is higher and the heat generation is more serious, the wireless chip needs to switch the half-bridge state to the full-bridge state. In one embodiment of the present invention, after setting the target output voltage VOUT of the wireless chip to the first voltage V1, the wireless charging method of the terminal further includes: obtaining the maximum allowable power of the adapter; and obtaining the working state of the wireless chip in the terminal when the maximum allowable power is obtained.

[0054] That is to say, after the target output voltage VOUT of the wireless chip is set to 12V, the mobile phone will send a private command B to the wireless charging base every 1s to obtain the maximum allowable power supported by the current adapter. At this time, the mobile phone will wait indefinitely until the wireless charging base replies to the private command B. The mobile phone determines the maximum allowable power of the current adapter based on the reply signal received from the wireless charging base, and then determines whether the current working state of the wireless chip is switched from the half-bridge state to the full-bridge state.

[0055] Furthermore, when the mobile phone is of low inductance and the wireless charging base is of high inductance, since the voltage values ​​of the input voltages of different wireless charging bases are instantly different, the wireless chip may have switched from the half-bridge state to the full-bridge state before the wireless charging base replies to the private command B. Once the wireless chip switches to the full-bridge state, the target output voltage can no longer be set to above the first voltage V1 due to energy coupling problems. Therefore, the working state of the wireless chip is first determined. If the wireless chip has switched from the half-bridge state to the full-bridge state, there is no need to set the target output voltage VOUT to the first voltage V1. The wireless charging can continue the charging operation according to the preset control measurement until the target output voltage VOUT of the wireless chip drops to the second voltage V2.

[0056] In addition, when wireless charging starts, the working state of the wireless chip is the half-bridge state. At this time, after the target output current IOUT of the wireless chip is set to I1, the mode of the register of the charge pump chip is set to the direct charging mode, and the target output voltage VOUT of the wireless chip is set to the first voltage V1, since the working mode of the wireless chip is still in the half-bridge state, the actual output voltage of the wireless chip is about 7V. Therefore, if it is determined that the working state of the wireless chip is still in the half-bridge state, the target output voltage VOUT is set to the first voltage V1 again, and then the target output voltage VOUT of the wireless chip in the half-bridge state is controlled to be gradually reduced to the second voltage V2. For example, taking the voltage margin as 150mV and the preset voltage △V=1V as an example, the second voltage V2 can be set to the battery voltage plus 150mV. When it is determined that the working state of the wireless chip has not switched from the half-bridge state to the full-bridge state, the target output voltage of the wireless chip is set to the first voltage V1, and then after confirming that the CEP is zero, the target output voltage VOUT is set to V1-1V, and then wait for the CEP to return to zero, and so on, until the target output voltage VOUT is adjusted to the second voltage V2.

[0057] In one embodiment of the present invention, the wireless charging method of the terminal further includes: determining the target output current IOUT of the wireless chip according to the maximum allowable power of the adapter, the maximum allowable power of the terminal, and the fast charging curve.

[0058] That is to say, the maximum allowable power of the adapter obtained above, the maximum allowable power of the mobile phone, and the fast charging curve are used to select the minimum output current value of the wireless chip as the target output current IOUT, thereby adjusting the output current of the wireless chip. It should be noted that the output current regulation of the wireless chip is also achieved by adjusting the target output voltage VOUT of the wireless chip. It can be understood that the larger the target output voltage VOUT, the larger the output current of the wireless chip, and vice versa.

[0059] According to one embodiment of the present invention, when the target output voltage VOUT reaches the second voltage V2 and the energy control error CEP of the wireless chip meets the preset conditions, the wireless charging method of the terminal also includes: controlling the wireless fast charging direct charging path of the terminal to be turned on; obtaining the current deviation detal_i between the target output current IOUT and the actual output current iout of the wireless chip; and setting the target output voltage VOUT of the wireless chip according to the current deviation detal_i when the energy control error CEP of the wireless chip meets the preset conditions.

[0060] That is, when the target output voltage VOUT=V2 and CEP is equal to 0, the wireless general charging path of the mobile phone is disconnected, the wireless fast charging direct charging path is turned on, and the battery is charged through the wireless fast charging direct charging path. Figure 2 For example, when VOUT=V2 and CEP=0, the load switch 2 is controlled to be disconnected, the MOS tube 5 is turned on, and the mobile phone is charged through the wireless fast charging direct charging path composed of the wireless chip 1-MOS tube 5-battery 4. Figure 3 For example, when it is determined that VOUT=V2 and CEP=0, the load switch 2 is controlled to be disconnected, the MOS tube in the charge pump chip 6 is turned on, and the mobile phone is charged through the wireless fast charging direct charging path composed of the wireless chip 1-charge pump chip 6-battery 4.

[0061] When the wireless fast charging direct charging path is turned on, the target output current IOUT and the actual output current iout of the wireless chip are determined, the current deviation detal_i=IOUT-iout is calculated, and the target output voltage VOUT of the wireless chip is adjusted according to the current deviation detal_i, thereby adjusting the actual output current iout to meet the preset requirements. In one embodiment of the present invention, the current deviation detal_i has a sign, and the target output voltage VOUT of the wireless chip is set according to the current deviation detal_i, including: determining the adjustment direction of the target output voltage VOUT according to the sign of the current deviation detal_i; determining the adjustment amplitude of the target output voltage VOUT according to the magnitude of the current deviation detal_i.

[0062] In one embodiment of the present invention, the magnitude of the current deviation detal_i is positively correlated with the adjustment amplitude of the target output voltage VOUT.

[0063] Specifically, the target output current IOUT and the actual output current iout of the wireless chip are obtained, and the current deviation detal_i=IOUT-iout is calculated to determine whether the energy control error CEP of the wireless chip is zero. If CEP is not zero, it means that the current target output voltage VOUT setting is unsuccessful on the wireless charging base. At this time, the CEP result can be fed back to the wireless charging base, and the wireless charging base makes further adjustments based on the CEP result until CEP returns to zero, and it is determined that the wireless charging base has completed the regulation based on the target output voltage VOUT. When CEP is equal to zero, the wireless chip adjusts the target output voltage VOUT according to the sign and size of the current deviation detal_i. For example, when it is determined that CEP is zeroed and the preset conditions are met, the sign and size of the current deviation detal_i are judged. If the sign of the current deviation detal_i is positive and the size of the current deviation detal_i is greater than 50ma, it means that the output current iout is too small and the target output voltage VOUT needs to be increased. The specific rules are as follows: when detal_i>500ma, the target output voltage VOUT increases by 50mV; when 300ma<detal_i≤500ma, the target output voltage VOUT increases by 25mV; when 100ma<detal_i≤300ma, the target output voltage VOUT increases by 12mV; when 50ma<detal_i≤100ma, the target output voltage VOUT increases by 10mV. If the sign of the current deviation detal_i is positive and the current deviation detal_i satisfies 0ma≤detal_i≤50ma, it is considered that the current output current iout is in the normal current range, and the target output voltage VOUT of the current wireless chip remains unchanged. If the sign of the current deviation detal_i is negative, it means that the output current iout is too large and the target output voltage VOUT needs to be reduced. The specific rules are as follows: when detal_i<-500ma, the target output voltage VOUT is reduced by 50mV; when -500ma≤detal_i<300ma, the target output voltage VOUT is reduced by 25mV; when -300ma≤detal_i<-100ma, the target output voltage VOUT is reduced by 12mV; when -100ma≤detal_i<0ma, the target output voltage VOUT is reduced by 10mV. Therefore, according to the above adjustment rules, the communication quality can be guaranteed while avoiding overcharging and repeated adjustment.

[0064] It can be understood that the above current adjustment rule is only one implementable manner of the present invention and can be specifically set according to actual conditions.

[0065] As a specific embodiment of the present invention, as shown in FIG. 4 , the wireless charging method of the terminal may include the following steps:

[0066] S101, the terminal is connected to the wireless charging base.

[0067] S102, determine whether the adapter is a fast charging type. If so, execute step S103; if not, execute step S104.

[0068] S103, determining whether the terminal has a charge pump chip; if so, executing step S105; if not, executing step S106.

[0069] S104, determining that the terminal executes the bpp charging process specified by the QI protocol.

[0070] S105: Determine that the charging mode of the terminal is the wireless fast charging direct charging mode. Execute step S108.

[0071] S106, determining whether the inductance Ha of the terminal is less than the first inductance H1, and the inductance Hb of the wireless charging base is greater than the second inductance H2. If yes, executing step S105; if no, executing step S107.

[0072] S107, determining that the charging mode of the terminal is a charge pump mode.

[0073] S108, determining a fast charging curve corresponding to the wireless fast charging direct charging mode, and controlling the wireless general charging channel of the terminal to be turned on.

[0074] S109, setting the register mode of the charge pump chip to the direct charging mode, setting the target output current IOUT of the wireless chip to the first current I1, and setting the target output voltage VOUT of the wireless chip to the first voltage V1.

[0075] S110, obtaining the maximum allowable power of the adapter.

[0076] S111, when the maximum allowed power is obtained, the working state of the wireless chip in the terminal is obtained. If the working state of the wireless chip is a half-bridge state, step S112 is executed; if the working state of the wireless chip is a full-bridge state, step S113 is executed.

[0077] S112, setting the target output voltage VOUT of the wireless chip to the first voltage V1.

[0078] S113, judging whether the energy control error CEP of the wireless chip is zero. If yes, executing step S114; if no, executing step S113.

[0079] S114, controlling the target output voltage VOUT of the wireless chip to be VOUT=VOUT-ΔV.

[0080] S115, determining whether the target output voltage VOUT reaches the second voltage V2. If yes, executing step S117; if no, executing step S113.

[0081] S116 , directly and gradually reducing the target output voltage VOUT of the wireless chip until the target output voltage VOUT reaches the second voltage V2 .

[0082] S117, performing current regulation until charging is completed.

[0083] like Figure 5 As shown, the current regulation in step S114 may include the following steps:

[0084] S201, determining that the target output voltage VOUT of the wireless chip reaches the second voltage V2, and the energy control error CEP of the wireless chip returns to zero.

[0085] S202, controlling the wireless fast charging direct charging path of the terminal to be turned on.

[0086] S203, determining the target output current IOUT and the actual output current iout of the wireless chip.

[0087] S204, calculating a current deviation Detal_i=IOUT-iout between a target output current and an actual output current of the wireless chip.

[0088] S205, determine whether Detal_i is greater than 50ma. If yes, execute step S206; if no, execute step S216.

[0089] S206, determine whether Detal_i is less than 100ma. If yes, execute step S207; if no, execute step S211.

[0090] S207, determining that the adjustment amplitude Detal_v is 10mv.

[0091] S208, target output voltage VOUT=VOUT+Detal_v.

[0092] S209, setting the target output voltage VOUT into the register of the wireless chip.

[0093] S210, determining whether the energy control error CEP of the wireless chip is zero. If yes, executing step S203; if no, executing step S210.

[0094] S211, determine whether Detal_i is less than 300ma. If yes, execute step S212; if no, execute step S213.

[0095] S212, determine that the adjustment amplitude is Detal_v is 12mv. Execute step S208.

[0096] S213, determine whether Detal_i is less than 500ma. If yes, execute step S214; if no, execute step S215.

[0097] S214, determine that the adjustment amplitude is Detal_v is 25mv. Execute step S208.

[0098] S215, determine that the adjustment amplitude is Detal_v is 50mv. Execute step S208.

[0099] S216, determine whether Detal_i is greater than 0ma. If yes, execute step S217; if no, execute step S218.

[0100] S217, keep the current target output voltage VOUT unchanged.

[0101] S218, determine whether Detal_i is greater than -100ma. If so, execute step S219; if not, execute step S221.

[0102] S219, determining that the adjustment amplitude Detal_v is 10mv.

[0103] S220, target output voltage VOUT=VOUT-Detal_v. Execute step S209.

[0104] S221, determine whether Detal_i is greater than -300ma. If yes, execute step S222; if no, execute step S223.

[0105] S222, determine that the adjustment amplitude is Detal_v is 12mv. Execute step S220.

[0106] S223, determine whether Detal_i is greater than -500ma. If yes, execute step S224; if no, execute step S225.

[0107] S224, determine that the adjustment amplitude is Detal_v is 25mv. Execute step S220.

[0108] S225, determine that the adjustment amplitude is Detal_v is 50mv. Execute step S220.

[0109] Furthermore, the wireless charging method of the terminal of the embodiment of the present invention can, on the one hand, save the charge pump chip, greatly save the application cost, and ensure the wireless fast charging power; on the other hand, for the fast charging form of low-inductance terminal + high-inductance wireless charging base, the method can be compatible with the high-inductance wireless charging base, so that it can perform safe and effective wireless fast charging. Therefore, the wireless charging method of the terminal can be applicable to the wireless fast charging solution of low-end terminals without charge pump chips, and is also applicable to the fast charging solution of low-inductance terminal + high-inductance wireless charging base.

[0110] In summary, according to the wireless charging method of the terminal of the embodiment of the present invention, first determine that the charging mode of the terminal is the wireless fast charging direct charging mode, obtain the working state of the wireless chip in the terminal, and when the working state is the half-bridge state, first set the target output voltage of the wireless chip to the first voltage, and when the energy control error of the wireless chip meets the preset conditions, then gradually reduce the target output voltage until the target output voltage reaches the second voltage; when the working state is the full-bridge state, directly and gradually reduce the target output voltage of the wireless chip until the target output voltage reaches the second voltage. When the terminal is in the wireless fast charging direct charging mode, this method performs different step-down controls according to the current working state of the wireless chip, thereby adjusting the actual output voltage of the wireless chip, which can realize wireless direct charging without the charge pump chip, and reduce the application cost.

[0111] Corresponding to the above embodiment, the present invention also proposes a computer-readable storage medium.

[0112] The computer-readable storage medium of the embodiment of the present invention stores a wireless charging program for a terminal, and the wireless charging program for the terminal implements the above-mentioned wireless charging method for the terminal when executed by a processor.

[0113] According to the computer-readable storage medium of an embodiment of the present invention, based on the wireless charging method of the terminal mentioned above, when the terminal is in the wireless fast charging direct charging mode, different voltage reduction controls are performed according to the current working state of the wireless chip to adjust the actual output voltage of the wireless chip, thereby realizing wireless direct charging without the charge pump chip.

[0114] Corresponding to the above implementation, the present invention also proposes a terminal.

[0115] like Figure 6 As shown, the terminal 100 of the embodiment of the present invention includes: a memory 110, a processor 120, and a wireless charging program of the terminal stored in the memory 110 and executable on the processor 120. When the processor 120 executes the program, the above-mentioned wireless charging method of the terminal is implemented.

[0116] According to the terminal of an embodiment of the present invention, based on the wireless charging method of the terminal mentioned above, when the terminal is in the wireless fast charging direct charging mode, different voltage reduction controls are performed according to the current working state of the wireless chip, thereby adjusting the actual output voltage of the wireless chip, thereby realizing wireless direct charging without the charge pump chip, and reducing the application cost.

[0117] Corresponding to the above embodiment, the present invention further proposes a wireless charging device for a terminal.

[0118] like Figure 7 As shown, the wireless charging device of the terminal according to the embodiment of the present invention includes: an acquisition module 10 and a charging control module 20 .

[0119] Among them, the acquisition module 10 is used to determine that the charging mode of the terminal is a wireless fast charging direct charging mode, and to obtain the working state of the wireless chip in the terminal. The charging control module 20 is used to first set the target output voltage of the wireless chip to a first voltage when the working state is a half-bridge state, and then gradually reduce the target output voltage when the energy control error of the wireless chip meets a preset condition until the target output voltage reaches a second voltage; and when the working state is a full-bridge state, directly and gradually reduce the target output voltage of the wireless chip until the target output voltage reaches the second voltage.

[0120] According to one embodiment of the present invention, the adapter connected to the wireless charging base has a type, and the acquisition module 10 determines the wireless fast charging direct charging mode, which includes at least one of the following: when the type is a fast charging type and the wireless fast charging direct charging path of the terminal does not have a charge pump chip, the charging mode of the terminal is the wireless fast charging direct charging mode; when the type is a fast charging type, the wireless fast charging direct charging path of the terminal has a charge pump chip, and the inductance of the terminal is less than the first inductance and the inductance of the wireless charging base is greater than the second inductance, the charging mode of the terminal is the wireless fast charging direct charging mode.

[0121] According to one embodiment of the present invention, before acquiring the working status of the wireless chip in the terminal, the acquisition module 10 is also used to determine the fast charging curve corresponding to the wireless fast charging direct charging mode, and the charging control module 20 is also used to control the conduction of the wireless general charging path of the terminal; set the target output current of the wireless chip to the first current, set the mode of the register of the charge pump chip to the direct charging mode, and set the target output voltage of the wireless chip to the first voltage.

[0122] According to an embodiment of the present invention, after setting the target output voltage of the wireless chip to the first voltage, the acquisition module 10 is further used to: acquire the maximum allowable power of the adapter; and when the maximum allowable power is acquired, acquire the working state of the wireless chip in the terminal.

[0123] According to one embodiment of the present invention, the acquisition module 10 is further used to determine the target output current of the wireless chip according to the maximum allowable power of the adapter, the maximum allowable power of the terminal, and the fast charging curve.

[0124] According to one embodiment of the present invention, when the target output voltage reaches the second voltage and the energy control error of the wireless chip meets the preset conditions, the charging control module 20 is also used to control the conduction of the wireless fast charging direct charging path of the terminal, and the acquisition module 10 is also used to obtain the current deviation between the target output current and the actual output current of the wireless chip. The charging control module 10 is also used to set the target output voltage of the wireless chip according to the current deviation when the energy control error of the wireless chip meets the preset conditions.

[0125] According to one embodiment of the present invention, the current deviation has a sign, and the charging control module 10 sets the target output voltage of the wireless chip according to the current deviation, specifically for: determining the adjustment direction of the target output voltage according to the sign of the current deviation; determining the adjustment amplitude of the target output voltage according to the magnitude of the current deviation.

[0126] According to an embodiment of the present invention, the magnitude of the current deviation is positively correlated with the adjustment amplitude of the target output voltage.

[0127] It should be noted that for details not disclosed in the wireless charging device for a terminal in an embodiment of the present invention, please refer to the details disclosed in the wireless charging method for a terminal in the above-mentioned embodiment of the present invention, and no further details will be given here.

[0128] According to the wireless charging device of the terminal of the embodiment of the present invention, the charging mode of the terminal is determined to be the wireless fast charging direct charging mode through the acquisition module, and the working state of the wireless chip in the terminal is acquired. When the working state is the half-bridge state, the charging control module first sets the target output voltage of the wireless chip to the first voltage, and when the energy control error of the wireless chip meets the preset conditions, the target output voltage is gradually reduced until the target output voltage reaches the second voltage, and when the working state is the full-bridge state, the charging control module directly and gradually reduces the target output voltage of the wireless chip until the target output voltage reaches the second voltage. Therefore, when the terminal is in the wireless fast charging direct charging mode, the device performs different step-down controls according to the current working state of the wireless chip, thereby adjusting the actual output voltage of the wireless chip, and wireless direct charging without the charge pump chip can be realized, reducing the application cost of wireless charging.

[0129] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0130] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0131] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0132] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0133] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0134] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A wireless charging method for a terminal, characterized in that: The method comprises: Determine that the charging mode of the terminal is a wireless fast charging direct charging mode, and obtain the working state of the wireless chip in the terminal; When the working state is the half-bridge state, firstly set the target output voltage of the wireless chip to a first voltage, and when the energy control error of the wireless chip meets a preset condition, gradually reduce the target output voltage until the target output voltage reaches a second voltage; When the working state is the full-bridge state, the target output voltage of the wireless chip is directly and gradually reduced until the target output voltage reaches a second voltage; the second voltage is a voltage value matching the battery voltage.

2. The wireless charging method according to claim 1, characterized in that: The adapter connected to the wireless charging base has a type, and the method for determining the wireless fast charging direct charging mode includes at least one of the following: When the type is a fast charging type and the wireless fast charging direct charging path of the terminal does not have a charge pump chip, the charging mode of the terminal is the wireless fast charging direct charging mode; When the type is the fast charging type, the wireless fast charging direct charging path of the terminal has the charge pump chip, and the inductance of the terminal is less than the first inductance and the inductance of the wireless charging base is greater than the second inductance, the charging mode of the terminal is the wireless fast charging direct charging mode.

3. The wireless charging method according to claim 2, characterized in that: Before obtaining the working status of the wireless chip in the terminal, the method further includes: Determine the fast charging curve corresponding to the wireless fast charging direct charging mode, and control the wireless general charging path of the terminal to be turned on; The target output current of the wireless chip is set to a first current, the mode of the register of the charge pump chip is set to a direct charging mode, and the target output voltage of the wireless chip is set to the first voltage.

4. The wireless charging method according to claim 3, characterized in that: After setting the target output voltage of the wireless chip to the first voltage, the method further includes: Obtaining the maximum allowable power of the adapter; When the maximum allowed power is obtained, the working state of the wireless chip in the terminal is obtained.

5. The wireless charging method according to claim 4, characterized in that: The method further comprises: The target output current of the wireless chip is determined according to the maximum allowable power of the adapter, the maximum allowable power of the terminal, and the fast charging curve.

6. The wireless charging method according to any one of claims 1 to 5, characterized in that: When the target output voltage reaches the second voltage and the energy control error of the wireless chip meets a preset condition, the method further includes: Controlling the wireless fast charging direct charging path of the terminal to be turned on; Obtaining a current deviation between a target output current and an actual output current of the wireless chip; When the energy control error of the wireless chip meets a preset condition, the target output voltage of the wireless chip is set according to the current deviation.

7. The wireless charging method according to claim 6, characterized in that: The current deviation has a sign, and setting the target output voltage of the wireless chip according to the current deviation includes: Determining an adjustment direction of the target output voltage according to the sign of the current deviation; The adjustment amplitude of the target output voltage is determined according to the magnitude of the current deviation.

8. The wireless charging method according to claim 7, characterized in that: The magnitude of the current deviation is positively correlated with the adjustment amplitude of the target output voltage.

9. A computer-readable storage medium, characterized in that: A wireless charging program of the terminal is stored thereon, and when the wireless charging program of the terminal is executed by the processor, the wireless charging method of the terminal according to any one of claims 1-8 is implemented.

10. A terminal, characterized in that: include: A memory, a processor, and a wireless charging program for a terminal stored in the memory and executable on the processor, wherein when the processor executes the program, a wireless charging method for a terminal according to any one of claims 1 to 8 is implemented.

11. A wireless charging device for a terminal, characterized in that: The device comprises: An acquisition module, used to determine that the charging mode of the terminal is a wireless fast charging direct charging mode, and to acquire the working state of the wireless chip in the terminal; A charging control module is used to first set the target output voltage of the wireless chip to a first voltage when the working state is a half-bridge state, and then gradually reduce the target output voltage when the energy control error of the wireless chip meets a preset condition until the target output voltage reaches a second voltage; and, when the working state is a full-bridge state, directly and gradually reduce the target output voltage of the wireless chip until the target output voltage reaches a second voltage; the second voltage is a voltage value matching the battery voltage.

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