Wireless charging device, wireless charging system and wireless charging method

Abstract

Provided are a wireless charging device, a wireless charging system and a wireless charging method. The wireless charging device includes: a working panel, a transmitting coil, a base, a fixed guide rail and a driving device; the fixed guide rail is fixed relative to the base, the working panel is movably connected to the base, and the driving device is connected to the transmitting coil and the working panel respectively; the working panel is used to place a device to be charged provided with a receiving coil; the transmitting coil is used to transmit an electromagnetic signal to wirelessly charge the device to be charged; the driving device is used to drive the transmitting coil to move along the fixed guide rail, and drive the working panel to move relative to the base. The wireless charging device provided in the present application drives the transmitting coil to move along the fixed guide rail fixed to the base of the wireless charging device and / or drives the working surface to move relative to the base, so that the receiving coil is aligned with the transmitting coil, which can effectively improve the charging efficiency and thus enhance the user experience.

Description

Technical Field

[0001] The present embodiment relates to the field, and more specifically, to a wireless charging device, a wireless charging system and a wireless charging method. Background Art

[0002] At present, in the field of charging technology, the devices to be charged are mainly charged by wired charging.

[0003] Taking a mobile phone as an example, when the mobile phone needs to be charged, the mobile phone can be connected to a power supply device through a charging cable (such as a universal serial bus (USB) cable), and the output power of the power supply device is transmitted to the mobile phone through the charging cable to charge the battery in the mobile phone.

[0004] However, with the popularity of wireless charging, more and more electronic devices support wireless charging or wireless transmission functions, and wireless charging is becoming more and more popular. The transmitting coil for transmitting electromagnetic waves on the existing wireless charging base is basically fixed on the base, which means that when the device to be charged is placed on the base, it is necessary to find the correct position. Once the position is deviated, the charging efficiency will be reduced, which seriously affects the user experience. Summary of the invention

[0005] Provided are a wireless charging device, a wireless charging system and a wireless charging method, which can effectively improve charging efficiency and thus enhance user experience.

[0006] In one aspect, a wireless charging device is provided, comprising:

[0007] Working panel, transmitting coil, base, fixed rail and driving device;

[0008] The fixed guide rail is fixed relative to the base, the working panel is movably connected to the base, and the driving device is connected to the transmitting coil and the working panel respectively;

[0009] The working panel is used to: place the device to be charged provided with a receiving coil;

[0010] The transmitting coil is used to: transmit an electromagnetic signal to wirelessly charge the device to be charged;

[0011] The driving device is used to drive the transmitting coil to move along the fixed guide rail and drive the working panel to move relative to the base.

[0012] In another aspect, a wireless charging system is provided, comprising:

[0013] The aforementioned wireless charging device, and the device to be charged using the wireless charging device.

[0014] In another aspect, a wireless charging method is provided, comprising:

[0015] Placing a device to be charged provided with a receiving coil on a working panel of a wireless charging device, so as to wirelessly charge the device to be charged through a transmitting coil in the wireless device;

[0016] The transmitting coil is driven to move along a fixed guide rail fixedly arranged on the base of the wireless charging device; and / or the working panel is driven to move relative to the base.

[0017] The wireless charging device, wireless charging system and wireless charging method provided by the present application can effectively improve the charging efficiency and thus enhance the user experience by successively changing the positions of the transmitting coil and the device to be charged, specifically, by driving the transmitting coil to move along a fixed guide rail fixed to the base of the wireless charging device and / or driving the working surface to move relative to the base, so that the receiving coil is aligned with the transmitting coil. In addition, the working panel and the base are avoided from being designed separately, the operation process is simple and efficient, the alignment accuracy is high, and the equipment cost is further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 2 is a structural example diagram of a wireless charging system according to an embodiment of the present application.

[0019] Figure 2 It is a schematic block diagram of a device to be charged according to an embodiment of the present application.

[0020] Figure 3 It is another schematic block diagram of a device to be charged according to an embodiment of the present application.

[0021] Figure 4 It is a schematic block diagram of a wireless charging device according to an embodiment of the present application.

[0022] Figure 5 It is a schematic block diagram of the structure of the wireless charging device of the present application.

[0023] Figure 6 It is a schematic diagram of the movement of the working panel of the wireless charging device of the present application.

[0024] Figure 7 It is a schematic structural diagram of the wireless charging device of the present application.

[0025] Figure 8 It is another schematic structural diagram of the wireless charging device of the present application.

[0026] Fig. 9It is another schematic structural diagram of the wireless charging device of the present application.

[0027] Fig.10 It is a schematic flow chart of the wireless charging method of the present application. DETAILED DESCRIPTION

[0028] In this embodiment, the device to be charged is charged based on wireless charging technology. The wireless charging technology can complete power transmission without cables, which can simplify the operation in the charging preparation stage.

[0029] Wireless charging technology requires connecting a power supply device (such as an adapter) to a wireless charging device (such as a wireless charging base), and transmitting the output power of the power supply device to the device to be charged in a wireless manner (such as electromagnetic signals or electromagnetic waves) through the wireless charging device, so as to wirelessly charge the device to be charged. According to different wireless charging principles, wireless charging methods can be divided into three methods: magnetic coupling (or electromagnetic induction), magnetic resonance, and radio waves. Specific wireless charging standards may include: QI standard, power matters alliance (PMA) standard, and wireless power alliance (alliance for wireless power, A4WP). Both the QI standard and the PMA standard use magnetic coupling for wireless charging. The A4WP standard uses magnetic resonance for wireless charging.

[0030] Combine the following Figure 1 , the wireless charging method of this application is introduced.

[0031] like Figure 1 As shown, the wireless charging system includes a power supply device 110, a wireless charging device 120 and a device to be charged 130, wherein the wireless charging device 120 may be, for example, a wireless charging base, and the device to be charged 130 may be, for example, a terminal. The power supply device 110 includes, but is not limited to: an adapter, an AC power supply, a mobile power supply or a computer.

[0032] After the power supply device 110 is connected to the wireless charging device 120, the output current of the power supply device 110 is transmitted to the wireless charging device 120. The wireless charging device 120 can convert the output current of the power supply device 110 into an electromagnetic signal (or electromagnetic wave) for transmission through the internal wireless transmission circuit 121. For example, the wireless transmission circuit 121 can convert the output current of the power supply device 110 into alternating current, and convert the alternating current into an electromagnetic signal through the transmitting coil 122 (or transmitting antenna).

[0033] In the embodiment of the present application, before wireless charging, the wireless charging device 120 and the device to be charged 130 will pre-negotiate the transmission power of the wireless transmitting circuit 121. Assuming that the power negotiated between the wireless charging device 120 and the device to be charged 130 is 5W, the output voltage and output current of the wireless receiving circuit 131 are generally 5V and 1A. Assuming that the power negotiated between the wireless charging device 120 and the device to be charged 130 is 10.8W, the output voltage and output current of the wireless receiving circuit 131 are generally 9V and 1.2A.

[0034] In actual operation, the device to be charged 130 can receive the electromagnetic signal transmitted by the wireless transmitting circuit 121 through the wireless receiving circuit 131, and convert the electromagnetic signal into the output current of the wireless receiving circuit 131. For example, the wireless receiving circuit 131 can convert the electromagnetic signal transmitted by the wireless transmitting circuit 121 into alternating current through the receiving coil 134 (or receiving antenna), and perform operations such as rectifying and / or filtering on the alternating current, and convert the alternating current into the output voltage and output current of the wireless receiving circuit 131.

[0035] However, the output voltage of the wireless receiving circuit 131 is not suitable for being directly loaded onto the two ends of the battery 133, but needs to be transformed by the voltage management circuit 132 in the device to be charged 130 to obtain the expected charging voltage and / or charging current of the battery 133 in the device to be charged 130.

[0036] The voltage management circuit 132 may be used to transform the output voltage of the wireless receiving circuit 131 (eg, constant voltage and / or constant current control) to meet the expected charging voltage and / or charging current requirements of the battery 133 .

[0037] As an example, the voltage management circuit 132 may refer to a charging management module, such as a charging integrated circuit (IC). During the charging process of the battery 133, the voltage management circuit 132 may be used to manage the charging voltage and / or charging current of the battery 133. The voltage management circuit 132 may include a voltage feedback function and / or a current feedback function. Further, the voltage management circuit 132 may also include a voltage detection function and / or a current detection function. To achieve the management of the charging voltage and / or charging current of the battery 133.

[0038] For example, the charging process of the battery may include one or more of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage. In the trickle charging stage, the voltage management circuit 132 may utilize a current feedback function so that the current entering the battery 133 in the trickle charging stage satisfies the expected charging current size of the battery 133 (e.g., a first charging current). In the constant current charging stage, the voltage management circuit 132 may utilize a current feedback function so that the current entering the battery 133 in the constant current charging stage satisfies the expected charging current size of the battery 133 (e.g., a second charging current, which may be greater than the first charging current). In the constant voltage charging stage, the voltage management circuit 132 may utilize a voltage feedback function so that the size of the voltage loaded onto both ends of the battery 133 in the constant voltage charging stage satisfies the expected charging voltage size of the battery 133.

[0039] As an example, when the output voltage of the wireless receiving circuit 131 is greater than the expected charging voltage of the battery 133, the voltage management circuit 132 can be used to step down the output voltage of the wireless receiving circuit 131 so that the charging voltage obtained after the step-down conversion meets the expected charging voltage requirement of the battery 133.

[0040] As another example, when the output voltage of the wireless receiving circuit 131 is lower than the expected charging voltage of the battery 133, the voltage management circuit 132 may be used to boost the output voltage of the wireless receiving circuit 131 so that the charging voltage obtained after the boost conversion meets the expected charging voltage requirement of the battery 133.

[0041] For example, taking the wireless receiving circuit 131 outputting a constant voltage of 5V as an example, when the battery 133 includes a battery cell (taking a lithium battery cell as an example, the charging cut-off voltage of a battery cell is generally 4.2V), the voltage management circuit 132 (such as a Buck step-down circuit) can step down the output voltage of the wireless receiving circuit 131 so that the charging voltage obtained after the step-down meets the expected charging voltage requirement of the battery 133.

[0042] For example, taking the wireless receiving circuit 131 outputting a constant voltage of 5V as an example, when the battery 133 includes two or more battery cells connected in series (taking lithium battery cells as an example, the charging cut-off voltage of one battery cell is generally 4.2V), the voltage management circuit 132 (such as a Boost boost circuit) can boost the output voltage of the wireless receiving circuit 131 so that the charging voltage obtained after the boost meets the expected charging voltage requirement of the battery 133.

[0043] It should be understood that Figure 1The wireless charging system shown is only an example. Some or all of the specific technical features involved in the drawings can be combined or split in any appropriate way without contradiction. Some specific technical features can even be directly deleted to simplify the system. Specific technical features not marked in the drawings can also be added to improve system performance. This application does not make specific limitations. Figure 1 The voltage management circuit in the circuit can be divided into a buck circuit, a boost circuit and a detection circuit. For another example, Figure 1 The voltage management circuit shown is an optional circuit. For another example, Figure 1 The wireless charging system shown may also be provided with a communication function.

[0044] Figure 2 is a schematic block diagram of a wireless charging device according to an embodiment of the present application. Figure 3 and Figure 4 is a schematic block diagram of a device to be charged according to an embodiment of the present application. Figures 2 to 4 The wireless charging apparatus and the device to be charged according to the embodiment of the present application are exemplarily described.

[0045] like Figure 2 As shown, the wireless charging device 140 may include: a rectifier filter circuit (not shown), a voltage conversion circuit 143 (e.g., a DC / DC conversion circuit), a wireless transmitting circuit 141 including a transmitting coil 142, a first control circuit 142, and a first communication circuit 144. The following takes the voltage conversion circuit 143 as a DC / DC conversion circuit as an example.

[0046] The 214V AC power can be converted into stable DC power through a rectifier and filter circuit, and then the voltage is adjusted to a fixed value through a DC / DC conversion circuit to supply the wireless transmission circuit 141 .

[0047] It should be understood that the rectifier filter circuit and the DC / DC converter circuit are optional. As mentioned above, when the power supply device 100 is an AC power source, the wireless charging device 140 can be provided with a rectifier filter circuit and a DC / DC converter circuit. When the power supply device 100 can provide stable DC power, the rectifier filter circuit and / or the DC / DC converter circuit can be removed.

[0048] The wireless transmitting circuit 141 is used to convert the direct current provided by the DC / DC conversion circuit or the direct current provided by the power supply device into alternating current that can be coupled to the transmitting coil, and convert the alternating current into an electromagnetic signal for transmission through the transmitting coil.

[0049] Optionally, in an embodiment of the present application, the wireless transmission circuit 141 may include: an inverter circuit and a resonant circuit. The inverter circuit may include multiple switch tubes, and the output power may be adjusted by controlling the on-time (duty cycle) of the switch tubes. The resonant circuit is used to transmit electrical energy. For example, the resonant circuit may include a capacitor and a transmitting coil. By adjusting the resonant frequency of the resonant circuit, the output power of the wireless transmission circuit 141 may be adjusted.

[0050] Optionally, in an embodiment of the present application, the wireless charging device 140 may be a wireless charging base or a device with an energy storage function, etc. When the wireless charging device 140 is a device with an energy storage function, it also includes an energy storage module (for example, a lithium battery), which can obtain and store electrical energy from an external power supply device. Thus, the energy storage module can provide electrical energy to the wireless transmitting circuit 141. It should be understood that the wireless charging device 140 can obtain electrical energy from an external power supply device in a wired or wireless manner. Wired method, for example, connecting to an external power supply device through a charging interface (for example, a Type-C interface) to obtain electrical energy. Wireless method, for example, the wireless charging device 140 includes a wireless receiving circuit, which can obtain electrical energy from a device with a wireless charging function in a wireless manner.

[0051] The first control circuit 142 is used to control the wireless charging process. For example, the first control circuit 142 can control the communication between the first communication circuit 144 and the power supply device to determine the output voltage and / or output current of the power supply device. Or, the first control circuit 142 can also control the communication between the first communication circuit 144 and the device to be charged to achieve the interaction of charging information (for example, the voltage information of the battery of the device to be charged, the temperature information of the battery, the charging mode information, etc.), the determination of charging parameters (for example, charging voltage and / or charging current) for wireless charging, etc.

[0052] It should be understood that the wireless charging device 140 may also include other related hardware, logic devices, circuits and / or codes to achieve corresponding functions. For example, the wireless charging device 140 may also include a display module (for example, a light emitting diode or LED display screen) for displaying the charging status (for example, charging in progress or terminated, etc.) in real time during the wireless charging process.

[0053] like Figure 2As shown, in one embodiment of the present application, the wireless charging device 140 may further include: a voltage conversion circuit 143. The voltage conversion circuit 143 is used to convert the voltage of the current provided to the wireless transmitting circuit 141 when the voltage of the current provided to the wireless transmitting circuit 141 does not meet the preset condition. As mentioned above, in one embodiment, the current provided to the wireless transmitting circuit 141 may be provided by a DC / DC conversion circuit, a power supply device, or the aforementioned energy storage module.

[0054] Of course, alternatively, if the voltage provided to the wireless transmission circuit 141 can meet the voltage requirement of the wireless transmission circuit 141 for the input voltage, the voltage conversion circuit 143 can be omitted to simplify the implementation of the wireless charging device. The voltage requirement of the wireless transmission circuit 141 for the input voltage can be set according to actual needs, for example, set to 10V.

[0055] Optionally, in the embodiment of the present application, the voltage of the current provided to the wireless transmission circuit 141 cannot meet the preset condition, which means that the voltage is lower than the required voltage of the wireless transmission circuit 141 or the voltage is higher than the required voltage of the wireless transmission circuit 141. For example, if a high-voltage and low-current (e.g., 14V / 1A) charging mode is used for wireless charging, this charging mode has a high input voltage requirement for the wireless transmission circuit 141 (e.g., the voltage requirement is 10V or 14V). If the voltage provided to the wireless transmission circuit 141 cannot meet the voltage requirement of the wireless transmission circuit 141, the voltage conversion circuit 143 can boost the input voltage to meet the voltage requirement of the wireless transmission circuit 141. If the output voltage of the power supply device exceeds the voltage requirement of the wireless transmission circuit 141, the voltage conversion circuit 143 can step down the input voltage to meet the voltage requirement of the wireless transmission circuit 141.

[0056] like Figure 3 and 4 As shown, the device to be charged 150 may include: a wireless receiving circuit 151 including a receiving coil, a second control circuit 152 , a step-down circuit 153 , a detection circuit 154 , a battery 155 , a first charging channel 156 , and a second communication circuit 159 .

[0057] Optionally, in an embodiment of the present application, the wireless receiving circuit 151 is used to convert the electromagnetic signal transmitted by the wireless transmitting circuit 141 of the wireless charging device 140 into alternating current through the receiving coil 311, and perform operations such as rectifying and / or filtering on the alternating current to convert the alternating current into stable direct current to charge the battery 155.

[0058] Optionally, in the embodiment of the present application, the wireless receiving circuit 151 may include: a receiving coil and an AC / DC conversion circuit. The AC / DC conversion circuit is used to convert the alternating current received by the receiving coil into direct current.

[0059] Optionally, in the embodiment of the present application, the battery 155 may include a single cell or multiple cells. When the battery 155 includes multiple cells, the multiple cells are connected in series. Thus, the charging voltage that the battery 155 can withstand is the sum of the charging voltages that the multiple cells can withstand, which can increase the charging speed and reduce the heating during charging.

[0060] Taking the device to be charged as a mobile phone as an example, when the battery 155 of the device to be charged includes a single battery cell, the voltage of the internal single battery cell is generally between 3.0V-4.35V. When the battery 155 of the device to be charged includes two batteries connected in series, the total voltage of the two batteries connected in series is 6.0V-8.7V. Therefore, compared with a single battery cell, when multiple batteries are connected in series, the output voltage of the wireless receiving circuit 151 can be increased. Compared with a single battery cell, to achieve the same charging speed, the charging current required for multiple batteries is approximately 1 / N of the charging current required for a single battery cell, where N is the number of batteries connected in series in the device to be charged. In other words, under the premise of ensuring the same charging speed (the same charging power), the use of a multi-cell solution can reduce the size of the charging current, thereby reducing the heat generated by the device to be charged during the charging process. On the other hand, compared with the solution of a single battery cell, the solution of connecting multiple batteries in series can increase the charging voltage while keeping the charging current the same, thereby increasing the charging speed.

[0061] Optionally, in the embodiment of the present application, the first charging channel 156 may be a wire. A step-down circuit 153 may be provided on the first charging channel 156 .

[0062] The step-down circuit 153 is used to step down the direct current output by the wireless receiving circuit 151 to obtain the output voltage and output current of the first charging channel 156. In an optional embodiment, the voltage value and current value of the direct current output by the first charging channel 156 meet the charging requirements of the battery 155 and can be directly loaded to the battery 155. It should be understood that the provision of the step-down circuit 153 on the first charging channel is only an example. For example, in other alternative embodiments, the step-down circuit 153 can also be replaced by a boost circuit. Thus, when the output voltage of the wireless receiving circuit 151 is lower than the expected charging voltage of the battery 155, the boost circuit can be used to boost the output voltage of the wireless receiving circuit 131 so that the charging voltage obtained after the boost conversion meets the expected charging voltage requirement of the battery 155. The boost circuit and the step-down circuit 153 can also be integrated, for example, as Figure 1 The voltage management circuit 132 is shown.

[0063] The detection circuit 154 is used to detect the voltage value and / or current value of the first charging channel 156. The voltage value and / or current value of the first charging channel 156 may refer to the voltage value and / or current value between the wireless receiving circuit 151 and the buck circuit 153, that is, the output voltage value and / or current value of the wireless receiving circuit 151. Alternatively, the voltage value and / or current value on the first charging channel 156 may also refer to the voltage value and / or current value between the buck circuit 153 and the battery 155, that is, the output voltage and / or output current of the buck circuit 153.

[0064] Optionally, in an embodiment of the present application, the detection circuit 154 may include: a voltage detection circuit and a current detection circuit. The voltage detection circuit may be used to sample the voltage on the first charging channel 156 and send the sampled voltage value to the second control circuit 152. In an optional embodiment, the voltage detection circuit may sample the voltage on the first charging channel 156 by means of a series voltage divider. The current detection circuit 154 may be used to sample the current on the first charging channel 156 and send the sampled current value to the second control circuit 152. In some embodiments, the current detection circuit 154 may sample and detect the current on the first charging channel 156 by means of a galvanometer or a current detection resistor.

[0065] Optionally, in the embodiment of the present application, the second control circuit 152 can control the second communication circuit 159 to communicate with the wireless charging device, and feed back the voltage value and / or current value detected by the detection circuit 154 to the wireless charging device. Thus, the first control circuit 142 of the wireless charging device can adjust the transmission power of the wireless transmission circuit 141 according to the feedback voltage value and / or current value, so that the voltage value and / or current value of the direct current output by the first charging channel 156 matches the charging voltage value and / or current value required by the battery 155.

[0066] It should be understood that in the embodiment of the present application, "matching the charging voltage and / or current value required by the battery 155" includes: the voltage and / or current value of the direct current output by the first charging channel 156 is equal to the charging voltage and / or current value required by the battery 155 or floats within a preset range (for example, the voltage value floats up and down by 100 mV to 140 mV).

[0067] In the embodiment of the present application, the buck circuit 153 can be implemented in various forms. As an example, the buck circuit 153 can be a Buck circuit. As another example, the buck circuit 153 can be a charge pump. The charge pump is composed of a plurality of switching devices. The heat generated by the current flowing through the switching devices is very small, almost equivalent to the current directly passing through the wire. Therefore, using a charge pump as the buck circuit 153 can not only achieve a voltage reduction effect, but also generate less heat. As an example, the buck circuit 153 can also be a half-voltage circuit.

[0068] Optionally, in the embodiment of the present application, the setting of the boost multiple of the voltage conversion circuit 143 of the wireless charging device 140 and the step-down multiple of the step-down circuit 153 of the device to be charged 150 is related to parameters such as the output voltage that the power supply device can provide and the charging voltage required by the battery 155. The two may be equal or unequal, and the embodiment of the present application does not make specific limitations.

[0069] Optionally, in the embodiment of the present application, the voltage conversion circuit 143 may be set equal to the voltage step-down circuit 153. For example, the voltage conversion circuit 143 may be a voltage step-up circuit for increasing the output voltage of the power supply device by 2 times; the voltage step-down circuit 153 may be a half-voltage circuit for reducing the output voltage of the wireless receiving circuit 151 by half.

[0070] Optionally, in the embodiment of the present application, the voltage boost multiple of the voltage conversion circuit 143 and the voltage step-down multiple of the voltage step-down circuit 153 are set to 1:1. This setting method can make the output voltage and output current of the voltage step-down circuit 153 consistent with the output voltage and output current of the power supply device, respectively, which is conducive to simplifying the implementation of the control circuit. Taking the battery 155 as an example of a charging current requirement of 5A, when the second control circuit 152 learns through the detection circuit 154 that the output current of the voltage step-down circuit 153 is 4.5A, it is necessary to adjust the output power of the power supply device so that the output current of the voltage step-down circuit 153 reaches 5A. If the ratio of the voltage boost multiple of the voltage conversion circuit 143 to the voltage step-down multiple of the voltage step-down circuit 153 is not equal to 1:1, when adjusting the output power of the power supply device, the first control circuit 142 or the second control circuit 152 needs to recalculate the adjustment value of the output power of the power supply device based on the difference between the current output current of the voltage step-down circuit 153 and the expected value. In the embodiment of the present application, the voltage boost multiple of the voltage conversion circuit 143 and the voltage step-down multiple of the voltage step-down circuit 153 are set to 1:1, and the second control circuit 152 notifies the first control circuit 142 to increase the output current to 5A, thereby simplifying the feedback adjustment method of the wireless charging path.

[0071] like Figure 4As shown, in an embodiment of the present application, the device to be charged 150 may further include: a second charging channel 158. The second charging channel 158 may be a wire. A conversion circuit 157 may be provided on the second charging channel 158 for performing voltage control on the direct current output by the wireless receiving circuit 151 to obtain the output voltage and output current of the second charging channel 158 to charge the battery 155.

[0072] Optionally, in the embodiment of the present application, the conversion circuit 157 may include: a circuit for realizing voltage stabilization, and a circuit for realizing constant current and constant voltage. The circuit for voltage stabilization is connected to the wireless receiving circuit 151, and the circuit for realizing constant current and constant voltage is connected to the battery 155.

[0073] When the second charging channel 158 is used to charge the battery 155, the wireless transmitting circuit 141 may use a constant transmitting power, and after the wireless receiving circuit 151 receives the electromagnetic signal, the conversion circuit 157 processes it into a voltage and current that meets the charging requirements of the battery 155, and then inputs it into the battery 155 to charge the battery 155. It should be understood that in some embodiments, the constant transmitting power does not necessarily mean that the transmitting power remains completely unchanged, and it can vary within a certain range, for example, the transmitting power is 7.5W with a fluctuation of 0.5W.

[0074] Optionally, in the embodiment of the present application, when the battery 155 is charged through the second charging channel 158, the wireless charging device and the device to be charged can be wirelessly charged according to the Qi standard.

[0075] Optionally, in the embodiment of the present application, a voltage conversion circuit 143 is provided in the wireless charging device 140. A first charging channel 156 (for example, a wire) connected to the battery 155 is provided at the end of the device to be charged. The first charging channel 156 is provided with a step-down circuit 153 for stepping down the output voltage of the wireless receiving circuit 151 so that the output voltage and output current of the first charging channel 156 meet the charging requirements of the battery 155.

[0076] Optionally, in an embodiment of the present application, if the wireless charging device 140 uses an output power of 20W to charge the single-cell battery 155 in the charging device, and uses the second charging channel 158 to charge the single-cell battery 155, the input voltage of the wireless transmitting circuit 141 needs to be 5V, and the input current needs to be 4A. Using a current of 4A will inevitably cause the coil to heat up, thereby reducing the charging efficiency.

[0077] When the single-cell battery 155 is charged using the first charging channel 156, since the step-down circuit 153 is provided on the first charging channel 156, the input voltage of the wireless transmitting circuit 141 can be increased while the transmission power of the wireless transmitting circuit 141 remains unchanged (the aforementioned 14W), thereby reducing the input current of the wireless transmitting circuit 141.

[0078] Optionally, in the embodiment of the present application, the buck circuit 153 may adopt a half-voltage circuit, that is, the ratio of the input voltage to the output voltage of the buck circuit 153 is fixed at 2:1, so as to further reduce the heat generation of the buck circuit 153.

[0079] It can be understood that the wireless receiving circuit 151 can charge the battery 155 in an intermittent manner, and the cycle of the output current of the wireless receiving circuit 151 can change with the frequency of the AC power input to the wireless charging system, such as the AC power grid. For example, the frequency corresponding to the cycle of the output current of the wireless receiving circuit 151 is a multiple of the power grid frequency. In addition, when the output current of the wireless receiving circuit 151 can charge the battery 155 in an intermittent manner, the current waveform corresponding to the output current of the wireless receiving circuit 151 can be composed of one or a group of pulses synchronized with the power grid. Compared with constant direct current, the periodic change of the voltage / current in the form of pulsation can reduce the lithium plating phenomenon of lithium batteries, increase the service life of batteries, and is conducive to reducing the polarization effect of batteries, increasing the charging speed, and reducing the heating of batteries, thereby ensuring the safety and reliability of charging of the device to be charged.

[0080] Optionally, in the embodiment of the present application, the wireless charging device 140 can be configured to be in various shapes, for example, circular, square, etc.

[0081] Optionally, in the embodiment of the present application, many other communication information may be exchanged between the first communication circuit 144 and the second communication circuit 159. In some embodiments, the first communication circuit 144 and the second communication circuit 159 may exchange information for safety protection, abnormality detection or fault handling, such as temperature information of the battery 155, indication information of entering overvoltage protection or overcurrent protection, and power transmission efficiency information (the power transmission efficiency information may be used to indicate the power transmission efficiency between the wireless transmitting circuit 141 and the wireless receiving circuit 151).

[0082] For example, when the temperature of the battery 155 is too high, the first control circuit 142 and / or the second control circuit 152 can control the charging circuit to enter a protection state, such as controlling the charging circuit to stop wireless charging. For another example, after the first control circuit 142 receives the indication information of overvoltage protection or overcurrent protection sent by the second control circuit 152 through the second communication circuit 159, the first control circuit 142 can reduce the transmission power, or control the wireless transmission circuit 141 to stop working. For another example, after the first control circuit 142 receives the power transmission efficiency information sent by the second control circuit 152 through the second communication circuit 159, if the power transmission efficiency is lower than a preset threshold, the wireless transmission circuit 141 can be controlled to stop working, and the user is notified of this event, such as displaying that the power transmission efficiency is too low on a display screen, or indicating that the power transmission efficiency is too low through an indicator light, so that the user can adjust the wireless charging environment.

[0083] Optionally, in an embodiment of the present application, the first communication circuit 144 and the second communication circuit 159 can exchange other information that can be used to adjust the transmission power of the wireless transmission circuit 141, such as temperature information of the battery 155, information indicating the peak value or average value of the voltage and / or current on the first charging channel 156, power transmission efficiency information (the power transmission efficiency information can be used to indicate the power transmission efficiency between the wireless transmission circuit 141 and the wireless receiving circuit 151), etc.

[0084] For example, the second communication circuit 159 may send power transmission efficiency information to the first communication circuit 144, and the first control circuit 142 may determine the adjustment range of the transmission power of the wireless transmission circuit 141 according to the power transmission efficiency information received by the first communication circuit 144. Specifically, if the power transmission efficiency information indicates that the power transmission efficiency between the wireless transmission circuit 141 and the wireless receiving circuit 151 is low, the first control circuit 142 may increase the adjustment range of the transmission power of the wireless transmission circuit 141, so that the transmission power of the wireless transmission circuit 141 quickly reaches the target power.

[0085] For another example, if the wireless receiving circuit 151 outputs a voltage and / or current with a pulsating waveform, the second control circuit 152 may send information indicating the peak value or average value of the output voltage and / or output current of the first charging channel 156 to the first control circuit 142. The first control circuit 142 may determine whether the peak value or average value of the output voltage and / or output current of the first charging channel 156 matches the charging voltage and / or charging current currently required by the battery 155. If they do not match, the transmission power of the wireless transmitting circuit 141 may be adjusted.

[0086] For another example, the second communication circuit 159 can send temperature information of the battery 155 to the first communication circuit 144. If the temperature of the battery 155 is too high, the first control circuit 142 can reduce the transmission power of the wireless transmitting circuit 141 to reduce the output current of the wireless receiving circuit 151, thereby reducing the temperature of the battery 155.

[0087] However, in Figure 1 In the wireless charging system framework shown, the transmitting coil 122 for transmitting electromagnetic waves on the wireless charging device 120 is basically fixed on the base, which means that when the device 130 to be charged is placed on the wireless charging device 120, it is necessary to find the correct position. Once the position is deviated, the charging efficiency will be reduced, which will seriously affect the user experience.

[0088] In order to solve the above problems, a wireless charging device is provided in an embodiment of the present application. The transmitting coil in the wireless charging device and the working panel of the wireless charging device are adjustable, so that when the device to be charged is placed on the wireless charging device, the position of the transmitting coil in the wireless charging device can be adjusted to align with the receiving coil in the device to be charged, thereby improving the charging efficiency and enhancing the user experience.

[0089] Combine the following Figure 5 and Figure 6 , the wireless charging device 200 provided in the embodiment of the present application is introduced.

[0090] like Figure 5As shown, the wireless charging device 200 provided by the implementation of the present application may include: a working panel 210, a transmitting coil 250, a base 230, a fixed guide rail 240 and a driving device 220; the fixed guide rail 240 is fixed relative to the base 230, the working panel 210 is movably connected to the base 230, and the driving device 220 is connected to the transmitting coil 250 and the working panel 210 respectively; wherein the working panel 210 is used to place a device to be charged provided with a receiving coil; the transmitting coil 250 is used to transmit an electromagnetic signal to wirelessly charge the device to be charged; the driving device 220 is used to drive the transmitting coil 250 to move along the fixed guide rail 240, and drive the working panel 210 to move relative to the base 230. It should be noted that the position of the transmitting coil 250 in the wireless charging device 200 and the position of the receiving coil in the device to be charged in the present application are both adjustable. Specifically, for the transmitting coil 250, the transmitting coil 250 can move on the fixed rail 240, and the fixed rail 240 is fixedly arranged relative to the base 230. For example, the fixed rail 240 can be fixedly connected to the base 230. In other words, the transmitting coil 250 can move relative to the base 230. For the receiving coil, when the device to be charged provided with the receiving coil is placed on the working panel 210, when the working panel 210 moves relative to the base 230, the receiving coil also moves relative to the base 230. For example, Figure 6 As shown, when the working panel 210 rotates counterclockwise relative to the base 230, the receiving coil 311 in the device to be charged 310 on the working panel 210 also moves counterclockwise (as shown in FIG. Figure 6 The device to be charged 310 and the receiving coil 311 shown move from the position of the solid line to the position of the dotted line), when the transmitting coil 250 on the base 230 does not move, it is equivalent to the receiving coil 311 moving relative to the transmitting coil 250. Similarly, when the transmitting coil 250 moves on the fixed guide rail 240 and the working panel 210 does not move relative to the base 230, it is equivalent to the transmitting coil 250 moving relative to the receiving coil 311. In other embodiments, the transmitting coil 250 and the receiving coil 311 may move simultaneously relative to the base 230, which is not specifically limited in the embodiments of the present application. The wireless charging device provided by the present application can effectively improve the charging efficiency and thus enhance the user experience by successively changing the positions of the transmitting coil 250 and the device to be charged 310, specifically, by driving the transmitting coil 250 to move along the fixed guide rail 240 fixedly set with the base 230 of the wireless charging device and / or driving the working surface 210 to move relative to the base 230, so that the receiving coil 311 is aligned with the transmitting coil 250. In addition, the separate design of the working panel 210 and the base 230 is avoided, the operation process is simple and efficient, the alignment accuracy is high, and the equipment cost is further reduced.

[0091] In an optional embodiment, an anti-skid layer may be provided on the upper surface of the working panel 210. Thus, when the working panel 210 moves relative to the base 230, it is possible to ensure that the device to be charged 310 on the working panel 210 and the receiving coil 311 in the device to be charged 310 also move relative to the base 230.

[0092] It should be understood that the wireless charging device can be any device including the working panel 210, the transmitting coil 250, the base 230, the fixed guide rail 240 and the driving device 220 mentioned above, for example, the wireless charging device can be a wireless charging base. In addition, the device to be charged is any device including a receiving coil, such as a terminal. The above-mentioned terminal can be any terminal device, for example, the terminal includes but is not limited to a device configured to receive / send communication signals via a wired line connection (such as via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and / or another data connection / network) and / or via a wireless interface (for example, for a cellular network, a wireless local area network (WLAN), a digital television network such as a handheld digital video broadcasting handheld (DVB-H) network, a satellite network, an amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and / or another communication terminal). Terminals configured to communicate via a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" and / or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that may combine cellular radio telephones with data processing, fax and data communication capabilities; personal digital assistants (PDAs) that may include radio telephones, pagers, Internet / intranet access, web browsers, notepads, calendars and / or global positioning system (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. In addition, the device or terminal to be charged used in the embodiments of the present application may also include a power bank that is capable of receiving charging from a wireless charging device, thereby storing energy to provide energy to other electronic devices.

[0093] Combine the following Figure 7 9 to 10 illustrate the specific structure of the wireless charging device of the present application:

[0094] On the one hand, with respect to the mechanical structure of the driving device for driving the transmitting coil to move on the fixed guide rail, in an optional embodiment, as Figure 7 As shown, the driving device may include: a crank 413 and a connecting rod 414; the crank 413 is connected to the transmitting coil 416 through the connecting rod 414, and the connecting rod 414 is used to convert the rotation of the crank 413 into the reciprocating motion of the transmitting coil 416 on the fixed guide rail. Further, the driving device may also include: a first gear 412, the first gear 412 is connected to the crank 413, and is used to drive the crank 413 to rotate. Further, the gear teeth of the first gear 411 are used to mesh with the gear teeth of the stepper motor 410, and the stepper motor 410 is used to drive the first gear 411 to rotate. In addition, in order to ensure that the first gear 411 can effectively drive the crank 413 to rotate, in an achievable embodiment, the first gear 412 can be connected to the crank 413 by rotating the wheel disc 412. Therefore, when the stepper motor 410 drives the first gear 411 to rotate, it can drive the transmitting coil 416 to move on the fixed guide rail 417. On the other hand, with respect to the mechanical structure of the driving device for driving the working panel to move relative to the base, in an optional embodiment, as Figure 7 As shown, the driving device may include: a second gear 421, and the second gear 421 is connected to the working panel 422. Further, the inner side wall of the working panel 422 is formed with gear teeth, and the gear teeth of the second gear 421 mesh with the gear teeth formed on the inner side wall. Furthermore, the inner side wall may be perpendicular to the base 420. Further, the gear teeth of the second gear 421 are used to mesh with the gear teeth of the stepper motor 410, and the stepper motor 410 is used to drive the second gear 421 to rotate. Therefore, when the stepper motor 410 drives the second gear 421 to rotate, it can drive the working panel 422 to rotate together. As shown in FIG. Figure 7 As shown, further, the wireless charging device may further include: a slider 415, and the transmitting coil 416 is arranged on the fixed guide rail 417 through the slider 415. Furthermore, the fixed guide rail 417 is a linear guide rail. In other words, Figure 7 In the illustrated embodiment, the transmitting coil 416 is placed on a fixed guide rail 417 via a slider 415, and then the transmitting coil 416 is driven to move along the fixed guide rail 417 via a connecting rod 414 in a crank slider mechanism. Specifically, the fixed guide rail 417 is fixed in a base 420, the connecting rod 414 is movably connected to a crank 413, and the crank 413 is fixed to a rotating wheel 412; in addition, a working panel 422 is used to carry a device to be charged, and is movably matched with the base 420. The upper surface of the working panel 422 is an anti-slip layer, and a vertical inner side wall thereof is provided with gear teeth and meshes with the gear of a second gear 421, thereby enabling the working panel 422 to move relative to the base 420 through the meshing of the gear teeth provided on the second gear 421 and the vertical inner side wall.

[0095] In actual operation, when the transmitting coil 416 needs to move on the fixed guide rail 417, the stepper motor 410 drives the first gear 411, and the first gear 411 drives the rotating wheel 412 to rotate, thereby driving the crank 413 to rotate, and then driving the connecting rod 414 to pull the transmitting coil 416 to move; when the working panel 422 needs to rotate, the stepper motor 410 drives the second gear 421, and the second gear 421 drives the working panel 422 to rotate, so as to achieve the relative movement of the device to be charged and the base 420. In summary, in the embodiment of the present application, when the stepper motor 410 drives the first gear 411 to rotate, it can drive the transmitting coil 416 to move on the fixed guide rail 417, and when the stepper motor 410 drives the second gear 421 to rotate, it can drive the working panel 422 to rotate together.

[0096] Specifically, the stepper motor 410 can be an open-loop control component that converts an electrical pulse signal into an angular displacement or a linear displacement. In the case of non-overload, the speed and the stop position of the stepper motor only depend on the frequency and the number of pulses of the pulse signal, and are not affected by the load change, that is, a pulse signal is added to the stepper motor, and the stepper motor rotates a step angle. The existence of this linear relationship, coupled with the characteristics that the stepper motor has only periodic errors and no cumulative errors, makes it very simple to control the speed, position and other control fields with a stepper motor. The stepper motor in the embodiment of the present application can be a single-phase stepper motor or a multi-phase stepper motor. The single-phase stepper motor can be configured with a single-channel electrical pulse drive, and the output power meets the mechanical structure that can drive the position adjustment device. The multi-phase stepper motor can be configured with a multi-phase square wave pulse drive. When using a multi-phase stepper motor, the single-channel electrical pulse signal can be first converted into a multi-phase pulse signal by a pulse distributor, and then sent to each winding of the stepper motor after power amplification. Every time a pulse is input to the pulse distributor, the power-on state of each phase of the stepper motor changes, and the rotor will rotate through a certain angle (called the step angle). Ideally, the angle that the stepper motor rotates is proportional to the number of pulses input. When pulses of a certain frequency are continuously input, the motor speed and the frequency of the input pulses maintain a strict corresponding relationship and are not affected by voltage fluctuations and load changes. In addition, using the stepper motor 410 to drive the first gear 411 to rotate and / or drive the second gear 421 to rotate is only an example. In other alternative embodiments, other types of motors or drive components can also be used to drive the first gear 411 to rotate and / or drive the second gear 421 to rotate. For example, an electric motor.

[0097] It should be understood that Figure 7 The circular shape of the working panel 422 is an exemplary description, and the embodiments of the present application are not limited thereto. For example, in other optional embodiments, the shape of the working panel can be square, oval, polygonal, etc. Figure 8As shown, the working panel of the wireless charging device can be square. It should also be understood that Figure 7 The fixed guide rail 417 shown as a circular guide rail is only described as an example. In other optional embodiments, the fixed guide rail can also be an arc guide rail, a circular guide rail, or a curved guide rail. It should also be understood that the above example takes the inner wall of the working panel 422 as an example in which the gear teeth are formed, and the gear teeth of the second gear 421 are meshed with the gear teeth formed on the inner wall, but the embodiments of the present application are not limited to this. In other optional embodiments, the shaft portion of the second gear 421 is fixed relative to the working panel. For example, Fig. 9 As shown, the shaft of the second gear 521 is fixedly connected to the center of the working panel 522. Thus, when the stepper motor 610 drives the second gear 521 to rotate, the working panel 522 can be driven to rotate together. Fig. 9 As shown, the wireless charging device may also include: a stepping motor 510, a first gear 512, a moving turntable 512, a crank 513, a connecting rod 514, a slider 515 and a transmitting coil 516; wherein the transmitting coil 516 is arranged on the fixed guide rail 517 through the slider 515. The crank 513 is connected to the transmitting coil 516 through the connecting rod 514, the first gear 512 is connected to the crank 513, the gear teeth of the first gear 511 are meshed with the gear teeth of the stepping motor 510, and the first gear 512 can be connected to the crank 513 by rotating the wheel disc 512, that is, when the stepping motor 510 drives the first gear 511 to rotate, the transmitting coil 516 can be driven to move on the fixed guide rail 517.

[0098] It should also be understood that Figure 7 The various components and specific connection relationships shown are only examples, and the embodiments of the present application are not limited thereto. For example, in other alternative embodiments, Figure 7 The crank 413 and connecting rod 414 shown in the figure can also be replaced by other implementations, such as pulling the transmitting coil 416 on the fixed guide rail by a traction line, or for example, Figure 7 The crank 413, connecting rod 414 and slider 415 shown may refer to any planar connecting rod mechanism that uses a crank and a slider to achieve conversion between rotation and movement, such as a concentric crank slider mechanism, or an offset crank slider mechanism.

[0099] In actual operation, Figure 7As shown, the wireless charging device may further include a processor 430. Specifically, the processor 430 is connected to the transmitting coil 416 via a slider 415. The processor 430 is also connected to the stepper motor 410. The processor 430 may be used to detect the position of the device to be charged placed on the working panel 422 relative to the transmitting coil 416 and / or the receiving power of the receiving coil and / or the charging efficiency value of the device to be charged, and based on the relative position and / or the receiving power of the receiving coil and / or the charging efficiency value of the device to be charged, the transmitting coil 416 and / or the working panel 422 may be driven to move by driving the slider 415. As an example, the charging efficiency calculation formula may be: η = Pout / Pin, where Pout is the power of the device to be charged and Pin is the power output by the transmitting coil. As an example, the processor 430 may be implemented by a micro control unit (MCU), or may be implemented by an MCU and an application processor (AP) inside the device to be charged. For the convenience of description, the processor 430 driving the transmitting coil 416 by driving the slider 415 is directly described as the processor 430 driving the transmitting coil 416 .

[0100] The following is an explanation of the implementation manner in which the processor detects the receiving power of the receiving coil in the device to be charged placed on the working panel and / or the charging efficiency value of the device to be charged, and drives the transmitting coil and / or the working panel to move based on the receiving power of the receiving coil and / or the charging efficiency value of the device to be charged. For the convenience of description, in this embodiment, from the perspective of the driving device driving the transmitting coil to move and the driving device driving the working panel to move, the processor determines the charging efficiency value, and controls the driving device to drive the transmitting coil and / or the working panel based on the charging efficiency value as an example for explanation:

[0101] In an optional embodiment, the wireless charging device may further include: a communication device for communicating with the device to be charged to obtain the receiving power of the receiving coil of the device to be charged. Thus, in combination with the communication device, after the processor obtains the receiving power of the receiving coil, it can calculate the charging efficiency value according to the receiving power and the transmitting power of the transmitting coil; and when the charging efficiency value is less than or equal to the preset charging efficiency value, control the driving device to drive the transmitting coil and / or drive the working panel to move. Specifically, when the driving device drives the working panel to move, the processor drives the working panel to move in a first direction relative to the base; if the charging efficiency value increases, continue to drive the working panel to move in the first direction relative to the base until the step value of the charging efficiency value is less than or equal to the first threshold, or, if the charging efficiency value decreases, drive the working panel to move in a second direction opposite to the first direction relative to the base until the step value of the charging efficiency value is less than or equal to the first threshold. As an example, the first threshold can be the minimum value of the step value of the charging efficiency value when the driving device drives the working panel relative to the base. Further, when the driving device drives the working panel to move relative to the base, if the step value of the charging efficiency value is less than or equal to the first threshold value, and the charging efficiency value does not reach the preset charging efficiency value, the driving device drives the transmitting coil to move along the fixed guide rail. When the driving device drives the receiving coil to move, the driving device drives the transmitting coil to move along the fixed guide rail in a third direction. If the charging efficiency value increases, the driving device continues to drive the transmitting coil along the fixed guide rail in the third direction until the step value of the charging efficiency value is less than or equal to the second threshold value, or, if the charging efficiency value decreases, the driving device drives the transmitting coil to move along the fixed guide rail in a fourth direction opposite to the third direction until the step value of the charging efficiency value is less than or equal to the second threshold value. Optionally, the second threshold value is the minimum value of the step value when the driving device drives the transmitting coil to move along the fixed guide rail. Furthermore, when the driving device drives the transmitting coil along the fixed guide rail, if the step value of the charging efficiency value is less than or equal to the second threshold value and the charging efficiency value has not reached a preset charging efficiency value, the working panel is driven to move relative to the base.

[0102] In other words, the processor in this embodiment can be specifically used to perform the following steps:

[0103] Step 1: When the processor detects that a wireless charging connection is established between the transmitting coil and the device to be charged, the processor records the initial position of the receiving coil and the charging efficiency η0 at this position within the preset charging time period △t. If η0<ηmax, it means that the charging efficiency is relatively low and the base coil needs to be adjusted. Otherwise, there is no need to drive the stepper motor.

[0104] Step 2: The processor sends a first direction control signal to the stepper motor, the stepper motor runs at an angle of △θ, the gear meshing with the stepper motor and the working panel rotates at an angle of △θ accordingly, and then the working panel rotates at an angle of △θ, and the charging efficiency value η1 of the device to be charged at this position is recorded. If η1>η0, it means that the direction of the working panel is correct and can continue to be adjusted in this direction; if η1<η0, it means that the direction of the working panel is opposite and needs to be adjusted in the opposite direction; until the difference between ηk and ηk-1 is adjusted to be less than the minimum value of the step value, it means that the position is appropriate and no further adjustment is required. This position is the position with the highest charging efficiency in the first direction. At this time, this control signal is terminated to maintain the position of the device to be charged.

[0105] Step 3: The processor sends a second direction control signal to the stepper motor, and the stepper motor rotates at an angle of △θ. The gear meshing with the stepper motor and connected to the crank rotates at an angle of △θ accordingly. The crank drives the connecting rod to move the transmitting coil along the fixed guide rail for a length of △S, and the charging efficiency value η1 of the device to be charged at this position is recorded. If η1>η0, it means that the coil is running in the correct direction and can continue to be adjusted in this direction; if η1<η0, it means that the coil is running in the opposite direction and needs to be adjusted in the opposite direction; until the difference between ηk and ηk-1 is adjusted to be less than the minimum step value, at which time the transmission is at the maximum efficiency position, the two coils are aligned, and this control signal ends.

[0106] The following is a description of the implementation manner in which the processor detects the position of the receiving coil in the device to be charged placed on the working panel relative to the transmitting coil, and drives the transmitting coil and / or the working panel to move based on the relative position. For ease of description, from the perspective of the driving device driving the transmitting coil to move and the driving device driving the working panel to move, the processor determines the relative position of the transmitting coil relative to the receiving coil, and controls the driving device based on the relative position.

[0107] In an optional embodiment, the wireless charging device may further include: an infrared thermal sensing device, which is used to perform infrared thermal sensing when the device to be charged is charged, and output the infrared thermal sensing result to the processor; the processor is specifically used to: determine the relative position according to the infrared thermal sensing result. Wherein, the infrared thermal sensing device can be fixed below the transmitting coil and maintain a certain distance. Further, the distance can be determined according to the surface area of ​​the wireless charging device used to place the device to be charged, thereby ensuring the range of infrared thermal sensing as much as possible. In actual operation, the processor is used to: determine the position corresponding to the specific heating feature of the device to be charged according to preset information and the infrared thermal sensing result, the preset information represents the heating features of each known part of the device to be charged at a specific charging stage and / or charging efficiency, and the infrared thermal sensing result is the heating feature of the device to be charged at the specific charging stage and / or charging efficiency; determine the position of the receiving coil corresponding to the device to be charged according to the position corresponding to the specific heating feature of the device to be charged, and then determine the position of the receiving coil relative to the working panel; determine the relative position according to the position of the transmitting coil relative to the working panel and the position of the receiving coil relative to the working panel. That is, the specific heating feature in the heating cloud map of the device to be charged at a specific charging stage and / or charging efficiency obtained by the infrared thermal induction sensor device is matched with the heating feature in the preset heating cloud map at the specific charging stage and / or charging efficiency, and the position of the matched heating feature on the device to be charged is determined based on the preset heating cloud map. Since the receiving coil is fixed for the position with the specific heating feature, the position of the receiving coil relative to the working panel can be determined based on the position, and then the relative position is determined according to the position of the transmitting coil relative to the working panel and the position of the receiving coil relative to the working panel. Among them, the heating feature in this embodiment can be embodied in the form of a heating cloud map, and the heating cloud map reflects the heating conditions of each part. The heating cloud map can also be called a thermal imaging cloud map or a temperature cloud map. For example, as an example, the specific heating feature is: the temperature value is the highest.

[0108] In another optional embodiment, the wireless charging device may further include: a pressure sensing device, which is used to sense pressure when the device to be charged is charging, and output the pressure sensing result to the processor; the processor is specifically used to: determine the relative position according to the pressure sensing result. Specifically, the processor is used to: determine the position of the center point of the device to be charged relative to the working panel according to the pressure sensing result; determine the position of the receiving coil corresponding to the device to be charged according to the position of the center point of the device to be charged relative to the working panel, and then determine the position of the receiving coil relative to the working panel; determine the relative position according to the position of the transmitting coil relative to the working panel and the position of the receiving coil relative to the working panel. As an example, the pressure sensing device can be a resistive pressure sensor.

[0109] In another optional embodiment, the processor is specifically used to: acquire a first image, the first image is an image collected through the working panel, the first image may include an image of the device to be charged, the image of the device to be charged may include an identification pattern, the position of the identification pattern is used to indicate the position of the receiving coil; generate a coordinate system based on the first image to form a second image; determine the first coordinate of the receiving coil in the second image based on the coordinates of the identification pattern in the second image; determine the relative position based on the first coordinate. As an example, the identification pattern may include at least one of the following: a corner identification pattern of the device to be charged and a trademark identification pattern of the device to be charged. In addition, in the embodiment of the present application, the size of the device to be charged in the second image does not strictly correspond to the actual size of the device to be charged. That is, the size of the collected image and the actual size of the device to be charged may be in a scaling relationship. Therefore, in order to accurately determine the coordinates of the identification pattern in the second image. As an example, after the processor acquires the first image and determines the first coordinates, the first coordinates may be determined according to the coordinates of the identification pattern in the second image, the positional relationship between the identification pattern and the receiving coil in the device to be charged, and the first scaling ratio, and the first scaling ratio is the scaling ratio of the device to be charged in the second image. More specifically, the second image may also include an image of the transmitting coil, so that when the processor is used to determine the relative position based on the first coordinate, it may first determine the second coordinate of the image of the transmitting coil in the second image, and then determine the relative position according to the first coordinate and the second coordinate. Since in the embodiment of the present application, the distance between the transmitting coil and the receiving coil calculated by the processor on the coordinate system of the second image is not necessarily the actual distance, therefore, in order to further improve the accuracy of the movement parameter, as an example, the processor may determine the position of the transmitting coil relative to the receiving coil in the second image according to the first coordinate and the second coordinate; determine the relative position according to the position of the transmitting coil relative to the receiving coil in the second image and the second scaling ratio, and the second scaling ratio is the scaling ratio of the working panel in the second image. In one embodiment, the wireless charging device may also include an image acquisition device, for example, so that the processor may obtain the first image through the image acquisition device. Further, one side of the working panel is used to place the device to be charged, the image acquisition device is located on the other side of the working panel, and the component material of the working panel is a transparent material. Furthermore, there is a gap between the image acquisition device and the working panel, and the gap is used to enable the image acquisition device to acquire the complete working panel. Optionally, the image acquisition device is a camera.

[0110] In the process of adjusting the position of the transmitting coil, the processor may, after acquiring the first image and before generating a coordinate system based on the first image to form a second image, perform image analysis on the first image, and after determining the position of the identification pattern in the first image, generate the second image and determine the coordinates of the identification pattern in the second image. The processor may also perform image analysis on the second image after generating a coordinate system based on the first image to form a second image, and determine the coordinates of the identification pattern in the second image.

[0111] The following is an exemplary description of the analysis method of the first image in the embodiment of the present application.

[0112] As an example, the processor may perform image binarization processing on the first image.

[0113] In digital image processing, there are many systems that are implemented with binary image processing. Therefore, the use of "binarization" to process images is not only highly applicable, but also conducive to the fact that when the image is further processed, the collective properties of the image are only related to the position of the point whose value is 0 or 255 of the pixel point, and no longer involve the multi-level value of the pixel, making the processing simple, and the processing and compression amount of the data are small. In the embodiment of the present application, the processor can perform image binarization (ImageBinarization) processing on the first image, obtain the binary image of the first image, and calculate the horizontal gradient response value and the vertical gradient response value of the binary image, and determine the position of the identification pattern. Specifically, all pixels whose grayscale is greater than or equal to the threshold value can be judged to belong to a specific object (i.e., the identification pattern in the above text), and its grayscale value is represented by 255, otherwise these pixels are excluded from the object area, and the grayscale value is 0, indicating the background or the exceptional object area. It can be found that if a specific object has a uniform grayscale value inside (such as the trademark logo pattern mentioned above), and it is located in a uniform background with other levels of grayscale values ​​(such as the trademark logo is on the background of the back cover of a mobile phone), the threshold method can be used to obtain a better segmentation effect.

[0114] As another example, the processor may also perform Hough Transform processing on the first image.

[0115] Hough transform is a feature extraction technique in image processing, which detects objects with specific shapes through a voting algorithm. In the embodiment of the present application, the classic Hough transform can be used to detect the straight lines in the first image, that is, the peripheral straight lines of the device to be charged in the first image above can be detected, and then the corner identification pattern in the second image can be determined according to the position where multiple straight lines intersect. In addition, in the embodiment of the present application, the Hough transform can also be extended to the recognition of objects of arbitrary shapes, such as trademark logo patterns. In the implementation process, the Hough transform process involves the transformation between two coordinate spaces. Specifically, a curve or straight line with the same shape in one coordinate space is mapped to a point in another coordinate space to form a peak, thereby converting the problem of detecting arbitrary shapes into a statistical peak problem. In the embodiment of the present application, the Hough transform can be used to determine the position of the identification pattern in the first image.

[0116] As yet another example, the processor may further analyze the first image by using a Sobel operator.

[0117] The Sobel operator is one of the operators in image processing. In the embodiment of the present application, the Sobel operator can be used to perform edge detection on the first image. Technically, it is a discrete difference operator used to calculate the approximate value of the gradient of the brightness function of the first image. Using this operator at any point in the first image will generate a corresponding gradient vector or its normal vector.

[0118] The terms involved in the Sobel operator include:

[0119] Edge: A sudden change in grayscale or structure information. This feature can be used to segment the first image.

[0120] Those skilled in the art will understand that the edge of an object appears in the form of discontinuity of local characteristics of an image. For example, a sudden change in grayscale value, a sudden change in color, a sudden change in texture structure, etc. In essence, an edge means the end of one area and the beginning of another. The edge information of an image is very important in image analysis and human vision, and is an important attribute for extracting image features in image recognition.

[0121] In addition, the edge of the image has two characteristics: direction and amplitude. The pixels along the edge change slowly, while the pixels perpendicular to the edge change dramatically. This change may appear as a jump type, a roof type, and a flange type. These changes correspond to different physical states in the scene. For example, jump-type changes often correspond to the depth of the image or the reflection boundary, while the latter two often reflect the discontinuity of the surface normal direction of the image. It should be noted that the actual image to be analyzed is often more complex and needs to be analyzed specifically according to the actual situation.

[0122] Edge point: A point in an image with coordinates [x, y] where the intensity changes significantly.

[0123] Edge segment: corresponds to the edge point coordinates [x, y] and its orientation. The orientation of the edge may be the gradient angle.

[0124] In the implementation process, after the Sobel operator calculates the gradient value G(x, y) at all the pixel points in the first image, a threshold T is selected. If G(x, y)>T at (x, y), the point is considered to be an edge point or edge segment. In addition, since the Sobel operator only needs to use the brightness value projection in two directions, namely the horizontal gradient response and the vertical gradient response, the calculation of edge detection is simple and fast. In the embodiment of the present application, by performing Sobel contour extraction and threshold segmentation on the first image, the identification pattern of the embodiment of the present application can be analyzed, and then a coordinate system is established to form the second image, and the coordinates of the identification pattern in the second image are determined. It should be understood that the Sobel operator is only an exemplary description of the embodiment of the present application, and the embodiment of the present application is not limited thereto. For example, it can also be a Robert operator, a Prewitt operator, a Laplacian of Gaussian (LOG) operator, etc.

[0125] In other embodiments, in order to further improve the accuracy of image processing, the original image may be subjected to "binarization" processing by threshold segmentation before the image is detected. That is, the grayscale image is binarized to obtain a binary image, and image detection is performed based on the binary image.

[0126] In addition, in an embodiment of the present application, a wireless charging system is also provided. The wireless charging system can be the wireless charging device described above, and a device to be charged using the wireless charging device.

[0127] In addition, in an embodiment of the present application, a wireless charging method is also provided. Fig.10 is a schematic flow chart of a wireless charging method provided in one embodiment of the present application. The method can be applied to a wireless charging device, for example, the wireless charging device described above. Fig.10 The method includes steps S610-S630. The method includes:

[0128] In step S610, a device to be charged provided with a receiving coil is placed on a working panel of a wireless charging device, so as to wirelessly charge the device to be charged through a transmitting coil in the wireless device.

[0129] In step S620, the transmitting coil is driven to move along a fixed guide rail fixedly arranged on the base of the wireless charging device; and / or the working panel is driven to move relative to the base.

[0130] Optionally, step S620 may include: driving the working panel with an anti-slip layer on its upper surface to move relative to the base.

[0131] Optionally, step S620 may include: converting the rotation of the crank into a reciprocating motion of the transmitting coil on the fixed guide rail through a connecting rod.

[0132] Optionally, Fig.10 The method may further include: driving the crank to rotate via a first gear.

[0133] Optionally, Fig.10 The method may further include: driving the first gear to rotate by meshing the gear teeth of the first gear with the gear teeth of the stepping motor.

[0134] Optionally, step S620 may include: driving the working panel to move relative to the base via a second gear.

[0135] Optionally, step S620 may include: meshing the gear teeth of the second gear with gear teeth formed on the inner side wall of the working panel, and driving the working panel to move relative to the base by driving the second gear.

[0136] Optionally, the inner side wall is perpendicular to the base.

[0137] Optionally, step S620 may include: fixing the shaft portion of the second gear relative to the working panel, and driving the working panel to move relative to the base via the second gear.

[0138] Optionally, step S620 may include: fixedly connecting the shaft portion of the second gear to the center of the working panel, and driving the working panel to move relative to the base via the second gear.

[0139] Optionally, Fig.10 The method may further include: meshing the gear teeth of the second gear with the gear teeth of the stepper motor.

[0140] Optionally, Fig.10 The method may further include: disposing the transmitting coil on the fixed guide rail by a slider.

[0141] Optionally, the fixed guide rail is a linear guide rail or a circular guide rail.

[0142] Optionally, the working panel is square or circular in shape.

[0143] Optionally, Fig.10The method may further include: obtaining the receiving power of the receiving coil of the device to be charged.

[0144] Optionally, step S620 may include: calculating a charging efficiency value according to the received power and the transmitting power of the transmitting coil; when the charging efficiency value is less than or equal to a preset charging efficiency value, driving the transmitting coil and / or driving the working panel to move. Further, when driving the working panel to move, the working panel is driven to move in a first direction relative to the base; if the charging efficiency value increases, the working panel is continued to be driven to move in the first direction relative to the base until the step value of the charging efficiency value is less than or equal to a first threshold value, or, if the charging efficiency value decreases, the working panel is driven to move in a second direction opposite to the first direction relative to the base until the step value of the charging efficiency value is less than or equal to the first threshold value.

[0145] Optionally, the first threshold is a minimum value of a step value of a charging efficiency value when the working panel is driven relative to the base.

[0146] Optionally, step S620 may include: when driving the working panel to move relative to the base, if the step value of the charging efficiency value is less than or equal to the first threshold value and the charging efficiency value does not reach a preset charging efficiency value, driving the transmitting coil to move along the fixed guide rail.

[0147] Optionally, step S620 may include: driving the transmitting coil along the fixed guide rail to move in a third direction, and if the charging efficiency value increases, continuing to drive the transmitting coil along the fixed guide rail to move in the third direction until the step value of the charging efficiency value is less than or equal to the second threshold value; or, if the charging efficiency value decreases, driving the transmitting coil along the fixed guide rail to move in a fourth direction opposite to the third direction until the step value of the charging efficiency value is less than or equal to the second threshold value.

[0148] Optionally, the second threshold is a minimum step value when driving the transmitting coil to move along the fixed guide rail.

[0149] Optionally, Fig.10 The method may also include: when the driving device drives the transmitting coil along the fixed guide rail, if the step value of the charging efficiency value is less than or equal to the second threshold value and the charging efficiency value does not reach a preset charging efficiency value, driving the working panel to move relative to the base.

[0150] Optionally, Fig.10 The method may further include: determining a relative position of the receiving coil and the transmitting coil; and driving the transmitting coil and / or the working panel to move according to the relative position so that the transmitting coil is aligned with the receiving coil.

[0151] In one achievable manner, the determining of the relative position of the receiving coil and the transmitting coil includes:

[0152] When the above-mentioned device to be charged is charging, infrared thermal sensing is performed and an infrared thermal sensing result is obtained; and the relative position is determined according to the infrared thermal sensing result.

[0153] In one achievable manner, the above-mentioned determining the relative position according to the infrared thermal sensing result includes:

[0154] According to the preset information and the infrared thermal sensing result, the position corresponding to the specific heating feature of the above-mentioned device to be charged is determined, the preset information represents the heating features of each known part of the above-mentioned device to be charged at a specific charging stage and / or charging efficiency, and the infrared thermal sensing result is the heating feature of the above-mentioned device to be charged at the specific charging stage and / or charging efficiency; according to the position corresponding to the specific heating feature of the above-mentioned device to be charged, the position of the receiving coil corresponding to the above-mentioned device to be charged is determined, and then the position of the receiving coil relative to the working panel is determined; according to the position of the transmitting coil relative to the working panel and the position of the receiving coil relative to the working panel, the relative position is determined.

[0155] Optionally, the specific heating feature is: the temperature value is the highest.

[0156] In one achievable manner, the determining of the relative position of the receiving coil and the transmitting coil includes:

[0157] When the above-mentioned device to be charged is charging, pressure sensing is performed and a pressure sensing result is obtained; and the relative position is determined according to the pressure sensing result.

[0158] In one achievable manner, the determining the relative position according to the pressure sensing result includes:

[0159] According to the pressure sensing result, the position of the center point of the above-mentioned device to be charged relative to the working panel is determined; according to the position of the center point of the above-mentioned device to be charged relative to the working panel, the position of the receiving coil corresponding to the above-mentioned device to be charged is determined, and then the position of the receiving coil relative to the working panel is determined; according to the position of the transmitting coil relative to the working panel and the position of the receiving coil relative to the working panel, the relative position is determined.

[0160] Optionally, the pressure sensing device is a resistive pressure sensor.

[0161] In one achievable manner, the determining of the relative position of the receiving coil and the transmitting coil includes:

[0162] Acquire a first image, which is an image collected through the working panel, and includes the image of the above-mentioned device to be charged, and the image of the above-mentioned device to be charged includes an identification pattern, and the position of the identification pattern is used to indicate the position of the receiving coil; generate a coordinate system based on the first image to form a second image; determine the first coordinates of the receiving coil in the second image based on the coordinates of the identification pattern in the second image; and determine the relative position based on the first coordinates.

[0163] Optionally, the identification pattern includes at least one of the following: a corner identification pattern of the device to be charged and a trademark identification pattern of the device to be charged.

[0164] In an achievable manner, the determining the first coordinates of the receiving coil in the second image based on the coordinates of the identification pattern in the second image includes:

[0165] The first coordinate is determined according to the coordinates of the identification pattern in the second image, the positional relationship between the identification pattern and the receiving coil in the above-mentioned device to be charged, and a first scaling ratio, where the first scaling ratio is the scaling ratio of the above-mentioned device to be charged in the second image.

[0166] In an achievable manner, the second image also includes an image of the transmitting coil, and determining the relative position based on the first coordinates includes:

[0167] The second coordinates of the image of the transmitting coil in the second image are determined; and the relative position is determined according to the first coordinates and the second coordinates.

[0168] In one achievable manner, determining the relative position according to the first coordinate and the second coordinate includes:

[0169] The position of the transmitting coil relative to the receiving coil in the second image is determined according to the first coordinate and the second coordinate; the relative position is determined according to the position of the transmitting coil relative to the receiving coil in the second image and a second zoom ratio, wherein the second zoom ratio is the zoom ratio of the working panel in the second image.

[0170] In one achievable manner, the acquiring of the first image includes:

[0171] The first image is acquired by an image acquisition device.

[0172] Optionally, one side of the working panel is used to place the above-mentioned device to be charged, the image acquisition device is located on the other side of the working panel, and the component material of the working panel is a transparent material.

[0173] Optionally, there is a gap between the image acquisition device and the working panel, and the gap is used to enable the image acquisition device to capture the entire working panel.

[0174] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0175] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0176] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0177] The devices and equipment mentioned in this application can be a chip system, or a device or equipment with a shell.

[0178] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

[0179] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0180] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless charging device, characterized in that: include: Working panel, transmitting coil, base, fixed rail and driving device; The fixed guide rail is fixed relative to the base, the working panel is movably connected to the base, and the driving device is connected to the transmitting coil and the working panel respectively; The working panel is used to: place the device to be charged provided with a receiving coil; The transmitting coil is used to: transmit an electromagnetic signal to wirelessly charge the device to be charged; The driving device is used to: drive the transmitting coil to move along the fixed guide rail, and drive the working panel to move relative to the base; When the driving device drives the working panel to move relative to the base in a first direction, if the charging efficiency value increases, the driving device continues to drive the working panel to move relative to the base in the first direction until the step value of the charging efficiency value is less than or equal to a first threshold value, or, if the charging efficiency value decreases, the driving device drives the working panel to move relative to the base in a second direction opposite to the first direction until the step value of the charging efficiency value is less than or equal to the first threshold value; When the driving device drives the transmitting coil to move along the fixed guide rail in the third direction, if the charging efficiency value increases, the driving device continues to drive the transmitting coil along the fixed guide rail to move in the third direction until the step value of the charging efficiency value is less than or equal to the second threshold value, or, if the charging efficiency value decreases, the driving device drives the transmitting coil along the fixed guide rail to move in a fourth direction opposite to the third direction until the step value of the charging efficiency value is less than or equal to the second threshold value; When one of the transmitting coil and the working panel moves, if the step value of the charging efficiency value is less than the threshold value and the charging efficiency value does not reach the preset charging efficiency value, the driving device drives the other of the working panel and the transmitting coil to move.

2. The wireless charging device according to claim 1, characterized in that: The upper surface of the working panel is provided with an anti-slip layer.

3. The wireless charging device according to claim 1, characterized in that: The driving device comprises: crank and connecting rod; The crank is connected to the transmitting coil via the connecting rod; The connecting rod is used to convert the rotation of the crank into the reciprocating motion of the transmitting coil on the fixed guide rail.

4. The wireless charging device according to claim 3, characterized in that: The driving device further comprises: A first gear is connected to the crank and is used to drive the crank to rotate.

5. The wireless charging device according to claim 4, characterized in that: The gear teeth of the first gear are used to mesh with the gear teeth of the stepping motor.

6. The wireless charging device according to claim 1, characterized in that: The driving device comprises: A second gear is connected to the working panel.

7. The wireless charging device according to claim 6, characterized in that: The inner side wall of the working panel is formed with gear teeth, and the gear teeth of the second gear mesh with the gear teeth formed on the inner side wall.

8. The wireless charging device according to claim 7, characterized in that: The inner side wall is perpendicular to the base.

9. The wireless charging device according to claim 6, characterized in that: The shaft portion of the second gear is fixed relative to the working panel.

10. The wireless charging device according to claim 9, characterized in that: The shaft portion of the second gear is fixedly connected to the center of the working panel.

11. The wireless charging device according to any one of claims 6 to 10, characterized in that: The gear teeth of the second gear are used to mesh with the gear teeth of the stepping motor.

12. The wireless charging device according to any one of claims 1 to 10, characterized in that: The wireless charging device also includes: A slider, wherein the transmitting coil is arranged on the fixed guide rail through the slider.

13. The wireless charging device according to any one of claims 1 to 10, characterized in that: The fixed guide rail is a linear guide rail or a circular guide rail.

14. The wireless charging device according to any one of claims 1 to 10, characterized in that: The working panel is in a square or round shape.

15. The wireless charging device according to any one of claims 1 to 10, characterized in that: The wireless charging device also includes: A communication device is used to communicate with the device to be charged to obtain the receiving power of the receiving coil of the device to be charged.

16. The wireless charging device according to claim 15, characterized in that: The wireless charging device also includes: The processor is used to calculate a charging efficiency value according to the received power and the transmitting power of the transmitting coil; and when the charging efficiency value is less than or equal to a preset charging efficiency value, control the driving device to drive the transmitting coil and / or drive the working panel to move.

17. The wireless charging device according to claim 1, characterized in that: The first threshold is a minimum value of a step value of a charging efficiency value when the driving device drives the working panel relative to the base.

18. The wireless charging device according to claim 17, characterized in that: The driving device is specifically used for: When the driving device drives the working panel to move relative to the base, if the step value of the charging efficiency value is less than or equal to the first threshold value and the charging efficiency value does not reach the preset charging efficiency value, the driving device drives the transmitting coil to move along the fixed guide rail.

19. The wireless charging device according to claim 1, characterized in that: The second threshold is a minimum step value when the driving device drives the transmitting coil to move along the fixed guide rail.

20. The wireless charging device according to claim 19, characterized in that: The driving device is specifically used for: When the driving device drives the transmitting coil along the fixed guide rail, if the step value of the charging efficiency value is less than or equal to the second threshold value and the charging efficiency value does not reach the preset charging efficiency value, the working panel is driven to move relative to the base.

21. The wireless charging device according to any one of claims 1 to 10, characterized in that: The wireless charging device also includes: a processor, configured to determine a relative position of the receiving coil and the transmitting coil; The driving device is specifically used to drive the transmitting coil and / or the working panel to move according to the relative position, so that the transmitting coil is aligned with the receiving coil.

22. The wireless charging device according to claim 21, characterized in that: The wireless charging device also includes: an infrared thermal sensing device, used for performing infrared thermal sensing when the device to be charged is charging, and outputting the infrared thermal sensing result to the processor; The processor is specifically used to determine the relative position according to the infrared thermal sensing result.

23. The wireless charging device according to claim 22, characterized in that: The processor is specifically used to determine the relative position according to the infrared thermal sensing result, including: the processor is used to: Determine the position corresponding to the device to be charged of a specific heating feature according to the preset information and the infrared thermal sensing result, wherein the preset information represents the heating features of each known part of the device to be charged at a specific charging stage and / or charging efficiency, and the infrared thermal sensing result is the heating feature of the device to be charged at the specific charging stage and / or charging efficiency; Determine the position of the receiving coil corresponding to the device to be charged according to the position of the specific heating feature corresponding to the device to be charged, and then determine the position of the receiving coil relative to the working panel; The relative position is determined according to the position of the transmitting coil relative to the working panel and the position of the receiving coil relative to the working panel.

24. The wireless charging device according to claim 23, characterized in that: The specific heating feature is: the temperature value is the highest.

25. The wireless charging device according to claim 21, characterized in that: The wireless charging device also includes: a pressure sensing device, used for sensing pressure when the device to be charged is charging, and outputting the pressure sensing result to the processor; The processor is specifically used to determine the relative position according to the pressure sensing result.

26. The wireless charging device according to claim 25, characterized in that: The processor is specifically used to determine the relative position according to the pressure sensing result, including: the processor is used to: Determining the position of the center point of the device to be charged relative to the working panel according to the pressure sensing result; Determine the position of the receiving coil corresponding to the device to be charged according to the position of the center point of the device to be charged relative to the working panel, and then determine the position of the receiving coil relative to the working panel; The relative position is determined according to the position of the transmitting coil relative to the working panel and the position of the receiving coil relative to the working panel.

27. The wireless charging device according to claim 25, characterized in that: The pressure sensing device is a resistive pressure sensor.

28. The wireless charging device according to claim 22, characterized in that: The processor is specifically used for: Acquire a first image, where the first image is an image captured through the working panel, the first image includes an image of the device to be charged, the image of the device to be charged includes an identification pattern, and the position of the identification pattern is used to indicate the position of the receiving coil; generating a coordinate system based on the first image to form a second image; Determining first coordinates of the receiving coil in the second image based on coordinates of the identification pattern in the second image; The relative position is determined based on the first coordinates.

29. The wireless charging device according to claim 28, characterized in that: The identification pattern includes at least one of the following: a corner identification pattern of the device to be charged and a trademark identification pattern of the device to be charged.

30. The wireless charging device according to claim 28, characterized in that: The processor is used to determine the first coordinates of the receiving coil in the second image based on the coordinates of the identification pattern in the second image, including: The processor is used to determine the first coordinates according to the coordinates of the identification pattern in the second image, the positional relationship between the identification pattern and the receiving coil in the device to be charged, and a first scaling ratio, wherein the first scaling ratio is the scaling ratio of the device to be charged in the second image.

31. The wireless charging device according to claim 28, characterized in that: The second image also includes an image of the transmitting coil, and the processor is configured to determine the relative position based on the first coordinates, including: the processor is configured to: determining second coordinates of the image of the transmitting coil in the second image; The relative position is determined according to the first coordinate and the second coordinate.

32. The wireless charging device according to claim 31, characterized in that: The processor is used to determine the relative position according to the first coordinate and the second coordinate, including: the processor is used to: Determine, according to the first coordinate and the second coordinate, a position of the transmitting coil relative to the receiving coil in the second image; The relative position is determined according to the position of the transmitting coil relative to the receiving coil in the second image and a second scaling ratio, where the second scaling ratio is the scaling ratio of the working panel in the second image.

33. The wireless charging device according to claim 28, characterized in that: The wireless charging device also includes: Image acquisition device, the processor is specifically used to: acquire the first image through the image acquisition device.

34. The wireless charging device according to claim 33, characterized in that: One side of the working panel is used for placing the device to be charged, the image acquisition device is located on the other side of the working panel, and the working panel is made of a transparent material.

35. The wireless charging device according to claim 33, characterized in that: There is a gap between the image acquisition device and the working panel, and the gap is used to enable the image acquisition device to capture the complete working panel.

36. The wireless charging device according to any one of claims 1 to 10, characterized in that: The wireless charging device is a wireless charging base.

37. The wireless charging device according to any one of claims 1 to 10, characterized in that: The device to be charged is a terminal.

38. A wireless charging system, characterized in that: include: A wireless charging device as claimed in any one of claims 1 to 37, and a device to be charged using the wireless charging device.

39. A wireless charging method, characterized in that: include: Placing a device to be charged provided with a receiving coil on a working panel of the wireless charging device, so as to wirelessly charge the device to be charged through a transmitting coil in the wireless charging device; Driving the working panel to move relative to the base in a first direction; If the charging efficiency value increases, continue to drive the working panel to move relative to the base in the first direction until the step value of the charging efficiency value is less than or equal to the first threshold value; or, if the charging efficiency value decreases, drive the working panel to move relative to the base in a second direction opposite to the first direction until the step value of the charging efficiency value is less than or equal to the first threshold value; and / or When driving the transmitting coil to move along the fixed guide rail in a third direction, if the charging efficiency value increases, continue to drive the transmitting coil along the fixed guide rail to move in the third direction until the step value of the charging efficiency value is less than or equal to a second threshold value, or, if the charging efficiency value decreases, drive the transmitting coil along the fixed guide rail to move in a fourth direction opposite to the third direction until the step value of the charging efficiency value is less than or equal to the second threshold value; When one of the transmitting coil and the working panel moves, if the step value of the charging efficiency value is less than the threshold value and the charging efficiency value does not reach the preset charging efficiency value, the driving device drives the other of the working panel and the transmitting coil to move.

40. The method according to claim 39, characterized in that The driving the working panel to move relative to the base comprises: The working panel with an anti-skid layer on its upper surface is driven to move relative to the base.

41. The method according to claim 39, characterized in that The step of driving the transmitting coil to move along a fixed guide rail fixedly arranged on the base of the wireless charging device comprises: The rotation of the crank is converted into the reciprocating motion of the transmitting coil on the fixed guide rail through the connecting rod.

42. The method according to claim 40, characterized in that The method further comprises: The crank is driven to rotate through the first gear.

43. The method according to claim 42, characterized in that The method further comprises: The first gear is driven to rotate by meshing the gear teeth of the first gear with the gear teeth of the stepping motor.

44. The method according to claim 39, characterized in that The step of driving the working panel to move relative to the base comprises: The working panel is driven to move relative to the base by the second gear.

45. The method according to claim 44, characterized in that The step of driving the working panel to move relative to the base through the second gear comprises: The gear teeth of the second gear are meshed with the gear teeth formed on the inner side wall of the working panel, and the working panel is driven to move relative to the base by driving the second gear.

46. ​​The method according to claim 45, characterized in that The inner side wall is perpendicular to the base.

47. The method according to claim 44, characterized in that The step of driving the working panel to move relative to the base through the second gear comprises: The shaft portion of the second gear is fixed relative to the working panel, and the working panel is driven to move relative to the base through the second gear.

48. The method according to claim 47, characterized in that Fixing the shaft of the second gear relative to the working panel, and driving the working panel to move relative to the base through the second gear, comprising: The shaft portion of the second gear is fixedly connected to the center of the working panel, and the working panel is driven to move relative to the base through the second gear.

49. The method according to any one of claims 39 to 48, characterized in that The method further comprises: Mesh the teeth of the second gear with the teeth of the stepper motor.

50. The method according to any one of claims 39 to 48, characterized in that The method further comprises: The transmitting coil is arranged on the fixed guide rail through a slider.

51. The method according to any one of claims 39 to 48, characterized in that The fixed guide rail is a linear guide rail or a circular guide rail.

52. The method according to any one of claims 39 to 48, characterized in that The working panel is in a square or round shape.

53. The method according to any one of claims 39 to 48, characterized in that The method further comprises: The receiving power of the receiving coil of the device to be charged is obtained.

54. The method according to claim 53, characterized in that The method further comprises: Calculating a charging efficiency value according to the received power and the transmitting power of the transmitting coil; When the charging efficiency value is less than or equal to a preset charging efficiency value, the transmitting coil is driven and / or the working panel is driven to move.

55. The method according to claim 39, characterized in that The first threshold is a minimum value of a step value of a charging efficiency value when the working panel is driven relative to the base.

56. The method according to claim 55, characterized in that The method further comprises: When the working panel is driven to move relative to the base, if the step value of the charging efficiency value is less than or equal to the first threshold value and the charging efficiency value has not reached a preset charging efficiency value, the transmitting coil is driven to move along the fixed guide rail.

57. The method according to claim 39, characterized in that The second threshold is a minimum step value when driving the transmitting coil to move along the fixed guide rail.

58. The method according to claim 57, characterized in that The method further comprises: When the driving device drives the transmitting coil along the fixed guide rail, if the step value of the charging efficiency value is less than or equal to the second threshold value and the charging efficiency value does not reach the preset charging efficiency value, the working panel is driven to move relative to the base.

59. The method according to any one of claims 39 to 48, characterized in that The method further comprises: determining a relative position of the receiving coil and the transmitting coil; The transmitting coil and / or the working panel are driven to move according to the relative position, so that the transmitting coil is aligned with the receiving coil.

60. The method according to claim 59, characterized in that The determining the relative position of the receiving coil and the transmitting coil comprises: Performing infrared thermal sensing when the device to be charged is charging, and obtaining infrared thermal sensing results; The relative position is determined according to the infrared thermal sensing result.

61. The method according to claim 60, characterized in that Determining the relative position according to the infrared thermal sensing result includes: Determine the position corresponding to the device to be charged of a specific heating feature according to the preset information and the infrared thermal sensing result, wherein the preset information represents the heating features of each known part of the device to be charged at a specific charging stage and / or charging efficiency, and the infrared thermal sensing result is the heating feature of the device to be charged at the specific charging stage and / or charging efficiency; Determine the position of the receiving coil corresponding to the device to be charged according to the position of the specific heating feature corresponding to the device to be charged, and then determine the position of the receiving coil relative to the working panel; The relative position is determined according to the position of the transmitting coil relative to the working panel and the position of the receiving coil relative to the working panel.

62. The method according to claim 61, characterized in that The specific heating feature is: the temperature value is the highest.

63. The method according to claim 62, characterized in that The determining the relative position of the receiving coil and the transmitting coil comprises: Performing pressure sensing when the device to be charged is charging, and obtaining a pressure sensing result; The relative position is determined according to the pressure sensing result.

64. The method according to claim 63, characterized in that The determining the relative position according to the pressure sensing result comprises: Determining the position of the center point of the device to be charged relative to the working panel according to the pressure sensing result; Determine the position of the receiving coil corresponding to the device to be charged according to the position of the center point of the device to be charged relative to the working panel, and then determine the position of the receiving coil relative to the working panel; The relative position is determined according to the position of the transmitting coil relative to the working panel and the position of the receiving coil relative to the working panel.

65. The method according to claim 63, characterized in that The pressure sensing device is a resistive pressure sensor.

66. The method of claim 60, wherein: The determining the relative position of the receiving coil and the transmitting coil comprises: Acquire a first image, where the first image is an image captured through the working panel, the first image includes an image of the device to be charged, the image of the device to be charged includes an identification pattern, and the position of the identification pattern is used to indicate the position of the receiving coil; generating a coordinate system based on the first image to form a second image; Determining first coordinates of the receiving coil in the second image based on coordinates of the identification pattern in the second image; The relative position is determined based on the first coordinates.

67. The method according to claim 66, characterized in that The identification pattern includes at least one of the following: a corner identification pattern of the device to be charged and a trademark identification pattern of the device to be charged.

68. The method according to claim 66, characterized in that The determining, based on the coordinates of the identification pattern in the second image, the first coordinates of the receiving coil in the second image comprises: The first coordinates are determined according to the coordinates of the identification pattern in the second image, the positional relationship between the identification pattern and the receiving coil in the device to be charged, and a first scaling ratio, where the first scaling ratio is the scaling ratio of the device to be charged in the second image.

69. The method according to claim 66, characterized in that The second image also includes an image of the transmitting coil, and determining the relative position based on the first coordinates includes: determining second coordinates of the image of the transmitting coil in the second image; The relative position is determined according to the first coordinate and the second coordinate.

70. The method according to claim 69, characterized in that The determining the relative position according to the first coordinate and the second coordinate comprises: Determine, according to the first coordinate and the second coordinate, a position of the transmitting coil relative to the receiving coil in the second image; The relative position is determined according to the position of the transmitting coil relative to the receiving coil in the second image and a second scaling ratio, where the second scaling ratio is the scaling ratio of the working panel in the second image.

71. The method of claim 66, wherein: The acquiring of the first image comprises: The first image is acquired by an image acquisition device.

72. The method according to claim 71, characterized in that One side of the working panel is used for placing the device to be charged, the image acquisition device is located on the other side of the working panel, and the working panel is made of a transparent material.

73. The method according to claim 71, characterized in that There is a gap between the image acquisition device and the working panel, and the gap is used to enable the image acquisition device to capture the complete working panel.

74. The method according to any one of claims 39 to 48, characterized in that The wireless charging device is a wireless charging base.

75. The method according to any one of claims 39 to 48, characterized in that The device to be charged is a terminal.

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