WO2019196069A1

WO2019196069A1 - Wireless charging apparatus and wireless charging method

Info

Publication number: WO2019196069A1
Application number: PCT/CN2018/082879
Authority: WO
Inventors: 万世铭
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-04-12
Filing date: 2018-04-12
Publication date: 2019-10-17

Abstract

Provided are a wireless charging apparatus and a wireless charging method. The apparatus comprises a first guide rail, a driving part and a transmission coil, wherein the driving part is used for driving the first guide rail to move and driving the transmission coil to move along the first guide rail; and the transmission coil is used for transmitting an electromagnetic signal to carry out wireless charging on a device, provided with a receiving coil, to be charged. By means of the wireless charging apparatus and the wireless charging method, adjustment of the position of the transmission coil can be realized, thereby improving the charging efficiency and improving the user experience.

Description

Wireless charging device and method of wireless charging

Technical field

The present application relates to the field of wireless charging, and more particularly to a wireless charging device and a method of wireless charging.

Background technique

With the popularity of wireless charging, more and more electronic devices support the wireless charging function, and the transmitting coils on the existing wireless charging base are basically fixed on the base, which causes the device to be placed on the base. When the user needs to find the position, once the position is deviated, the charging efficiency will be lowered, which seriously affects the user experience.

Summary of the invention

The present application provides a wireless charging device and a wireless charging method, which can adjust the position of the transmitting coil, thereby improving charging efficiency and improving user experience.

In one aspect, a wireless charging apparatus is provided, including: a first rail, a driving portion, and a transmitting coil, the driving portion configured to: drive the first rail to move, and drive the transmitting coil along the first rail The transmitting coil is configured to: emit an electromagnetic signal to wirelessly charge the device to be charged provided with the receiving coil. Optionally, the wireless charging device further includes a second rail, the second rail is fixedly disposed in the wireless charging device, and the driving portion is further configured to: drive the first rail along the second rail motion.

In another aspect, a wireless charging system is provided, including a wireless charging device and a device to be charged that wirelessly charges using a wireless charging device, wherein the wireless charging device includes: a first rail, a driving portion, and a transmitting coil, the driving Part of: driving the first rail movement and driving the transmitting coil to move along the first rail; the transmitting coil is configured to: emit an electromagnetic signal to wirelessly charge a device to be charged provided with a receiving coil . Optionally, the wireless charging device further includes a second rail, the second rail is fixedly disposed in the wireless charging device, and the driving portion is further configured to: drive the first rail along the second rail motion.

In another aspect, a wireless charging method is provided, the method being performed by a wireless charging device, the wireless charging device comprising: a first rail and a transmitting coil, the method comprising: driving the first rail by driving and/or Or driving the transmitting coil to move along the first rail, adjusting a position of the transmitting coil within a range of motion; transmitting electromagnetic signals through the transmitting coil to wirelessly charge a device to be charged provided with a receiving coil. Optionally, the wireless charging device further includes a second rail fixedly disposed in the wireless charging device, and the driving the first rail movement comprises: driving the first rail along the The second rail movement is described.

Therefore, in the solution of the present application, the wireless charging device includes a first rail, a driving portion, and a transmitting coil, and the driving portion drives the first rail to move and the driving transmitting coil moves along the first rail, so that the position of the transmitting coil can be realized. Automatic calibration to improve charging efficiency and enhance the user experience.

DRAWINGS

1 is a schematic block diagram of a wireless charging system in accordance with an embodiment of the present application.

2 is a schematic block diagram of a wireless charging device in accordance with an embodiment of the present application.

FIG. 3 is a schematic block diagram of a device to be charged according to an embodiment of the present application.

FIG. 4 is another schematic block diagram of a device to be charged according to an embodiment of the present application.

FIG. 5 is a schematic block diagram of a wireless charging device in accordance with an embodiment of the present application.

FIG. 6 is another schematic diagram of a wireless charging device in accordance with an embodiment of the present application.

FIG. 7 is still another schematic block diagram of a wireless charging system in accordance with an embodiment of the present application.

FIG. 8 is a schematic view of an arrangement of an infrared thermal sensor according to an embodiment of the present application.

9 is a schematic view of a pressure sensor in accordance with an embodiment of the present application.

FIG. 10 is a schematic diagram of a wireless charging device provided with a device to be charged according to an embodiment of the present application.

11 is a schematic diagram of a positional relationship of a transmitting coil and a receiving coil according to an embodiment of the present application.

FIG. 12 is a schematic diagram of a wireless charging method according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

In the embodiment of the present application, the charging device is charged based on the wireless charging technology, and the wireless charging technology can complete the power transmission without using a cable, and the operation in the charging preparation phase can be simplified.

The wireless charging technology generally connects a power supply device (such as an adapter) with a wireless charging device (such as a wireless charging base), and transmits the output power of the power supply device to the wireless device (such as an electromagnetic signal) to be charged by the wireless charging device. The device is to wirelessly charge the charging device.

According to the principle of wireless charging, wireless charging methods are mainly divided into magnetic coupling (or electromagnetic induction), magnetic resonance and radio waves. Currently, mainstream wireless charging standards include the QI standard, the power matters alliance (PMA) standard, and the 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 to wirelessly charge.

1 is a schematic diagram of a wireless charging system according to an embodiment of the present disclosure.

The wireless charging system includes a power supply device 110, a wireless charging device 120, and a device to be charged 130.

In an embodiment, the power supply device 110 is configured to provide direct current to the wireless charging device 120. The power supply device 110 can include a rectifier circuit, a transformer circuit, a control circuit, a charging interface, and the like, and can convert the AC input into a DC output for providing to the wireless charging device 120. For example, the power supply device can be an adapter, a charging treasure, or a vehicle power source.

In an embodiment, the power supply device 110 can also provide AC power directly to the wireless charging device 120. For example, the power supply device 110 can be an AC power source. When the power supply device 110 is an AC power source, the wireless charging device 120 further includes a circuit or module for converting AC power to DC power, for example, a rectification filter circuit, a DC/DC conversion circuit, and the like.

The wireless charging device 120 is configured to convert the direct current or alternating current provided by the power supply device 110 into an electromagnetic signal to perform power transmission by wireless.

Referring to FIG. 2, in an embodiment, the wireless charging device 120 includes: a rectifying and filtering circuit (not shown), a DC/DC converting circuit (not shown), a wireless transmitting circuit 121, and a first control circuit 122. .

The 220V AC power is converted into a stable DC power by a rectifying and filtering circuit, and then the voltage is adjusted to a fixed value to be supplied to the wireless transmitting circuit 121 through the conversion of the DC/DC converting circuit.

It should be understood that the rectification filter circuit and the DC/DC conversion circuit are optional. As described above, when the power supply device 110 is an AC power source, the wireless charging device 120 may be provided with a rectification filter circuit and a DC/DC conversion circuit. When the power supply device 110 can provide stable direct current, the rectification filter circuit and/or the DC/DC conversion circuit can be removed.

The wireless transmitting circuit 121 may include a transmitting coil (not shown) for converting a direct current supplied from a DC/DC converting circuit or a direct current supplied from a power supply device or the like into an alternating current that can be coupled to the transmitting coil. And transmitting the alternating current into an electromagnetic signal through the transmitting coil for transmitting.

In an embodiment, the wireless transmitting circuit 121 may include an inverter circuit and a resonant circuit. The inverter circuit can include a plurality of switching tubes, and the output power can be adjusted by controlling the conduction time (duty ratio) of the switching tubes. A resonant circuit for transmitting electrical energy. For example, the resonant circuit can include a capacitor and a transmitting coil. The magnitude of the output power of the wireless transmitting circuit 121 can be adjusted by adjusting the resonant frequency of the resonant circuit.

In an embodiment, the wireless charging device 120 can be a wireless charging dock or a device having an energy storage function or the like. When the wireless charging device 120 is a device having an energy storage function, it further includes an energy storage module (for example, a lithium battery), and the power can be obtained from the external power supply device 110 and stored. Thereby, the energy storage module can provide power to the wireless transmitting circuit 121. It should be understood that the wireless charging device 120 can obtain power from the external power supply device 110 by wire or wirelessly. The wired method, for example, is connected to an external power supply device through a charging interface (for example, a Type-C interface) to obtain power. In a wireless manner, for example, the wireless charging device 120 includes a wireless receiving circuit that can wirelessly derive power from a device having a wireless charging function.

The first control circuit 122 is configured to control the wireless charging process. For example, the first control circuit 122 can communicate with the power supply device 110 to determine an output voltage and/or an output current of the power supply device 110. Alternatively, the first control circuit 122 can also communicate with the device 130 to be charged to implement interaction of charging information (eg, voltage information of the battery of the device to be charged, temperature information of the battery, charging mode information, etc.), charging for wireless charging. Parameters (eg, charging voltage and/or charging current) are determined and the like.

It should be understood that the wireless charging device 120 may also include other related hardware, logic, circuitry, and/or code to implement the corresponding functionality. For example, the wireless charging device 120 can also include a display module (eg, can be a light emitting diode or an LED display) for displaying the state of charge (eg, charging in progress or termination, etc.) in real time during wireless charging.

Referring to FIG. 2, in an embodiment of the present disclosure, the wireless charging device 120 further includes: a voltage conversion circuit 123. The voltage conversion circuit 123 is configured to perform voltage conversion on the current supplied to the wireless transmission circuit 121 when the voltage of the current supplied to the wireless transmission circuit 121 does not satisfy the preset condition. As previously mentioned, in one embodiment, the current provided to the wireless transmit circuitry 121 may be provided by a DC/DC converter circuit, provided by a power supply device or provided by the aforementioned energy storage module, or the like.

Of course, alternatively, if the voltage supplied to the wireless transmitting circuit 121 can reach the voltage demand of the wireless transmitting circuit 121 for the input voltage, the voltage converting circuit 123 can be omitted to simplify the implementation of the wireless charging device. The voltage requirement of the wireless transmitting circuit 121 for the input voltage can be set according to actual needs, for example, set to 10V.

In an embodiment of the present disclosure, the voltage of the current supplied to the wireless transmitting circuit 121 cannot satisfy the preset condition, that is, the voltage is lower than the required voltage of the wireless transmitting circuit 121 or the voltage is higher than the required voltage of the wireless transmitting circuit 121. . For example, if wireless charging is performed using a high voltage, low current (eg, 20V/1A) charging mode, this charging mode requires a higher input voltage to the wireless transmitting circuit 121 (eg, a voltage requirement of 10V or 20V). If the voltage supplied to the wireless transmitting circuit 121 cannot reach the voltage requirement of the wireless transmitting circuit 121, the voltage converting circuit 123 can boost the input voltage to reach the voltage demand of the wireless transmitting circuit 121. If the output voltage of the power supply device exceeds the voltage requirement of the wireless transmission circuit 121, the voltage conversion circuit 123 can step down the input voltage to reach the voltage requirement of the wireless transmission circuit 121.

Referring to FIG. 3, in an embodiment of the present disclosure, the device to be charged 130 includes a wireless receiving circuit 131, a second control circuit 132, a step-down circuit 133, a detecting circuit 134, a battery 135, and a first charging channel 136.

In an embodiment, the wireless receiving circuit 131 includes a receiving coil (not shown) for converting the electromagnetic signal emitted by the transmitting coil of the wireless transmitting circuit 121 of the wireless charging device 120 into an alternating current by the receiving coil. And rectifying and/or filtering the alternating current to convert the alternating current into a stable direct current to charge the battery 135.

In one embodiment, the wireless receiving circuit 131 includes a receiving coil and an AC/DC converting circuit 137. The AC/DC conversion circuit 137 is configured to convert the alternating current received by the receiving coil into direct current.

In an embodiment of the present disclosure, the battery 135 may include a single cell or multiple cells. When the battery 135 includes a plurality of cells, the plurality of cells have a series relationship. Thus, the charging voltage that the battery 135 can withstand is the sum of the charging voltages that can be withstood by the plurality of cells, which can increase the charging speed and reduce the charging heat.

Taking the device to be charged as a mobile phone as an example, when the battery 135 of the device to be charged includes a single cell, the voltage of the internal single cell is generally between 3.0V and 4.35V. When the battery 135 of the device to be charged includes two cells connected in series, the total voltage of the two cells in series is 6.0V-8.7V. Thereby, the output voltage of the wireless receiving circuit 131 can be improved when the plurality of cells are connected in series as compared with the single cell. Compared with a single cell, to achieve the same charging speed, the charging current required for multi-cell cells is about 1/N of the charging current required for a single cell (N is the series-connected electricity in the device to be charged) The number of cores). In other words, under the premise of ensuring the same charging speed (the same charging power), the multi-cell cell scheme can reduce the charging current, thereby reducing the heat generation of the device to be charged during the charging process. On the other hand, compared with the single cell scheme, when the charging current is kept the same, the multi-cell series scheme can be used to increase the charging voltage and thereby increase the charging speed.

In an embodiment of the present disclosure, the first charging channel 136 can be a wire. A buck circuit 133 can be disposed on the first charging channel 136.

The step-down circuit 133 is configured to step down the direct current output from the wireless receiving circuit 131 to obtain an output voltage and an output current of the first charging channel 136. In one embodiment, the voltage and current values of the direct current output by the first charging channel 136 are in accordance with the charging requirements of the battery 135 and can be directly loaded into the battery 135.

The detecting circuit 134 is configured to detect a voltage value and/or a current value of the first charging channel 136. The voltage value and/or current value of the first charging path 136 may refer to a voltage value and/or a current value between the wireless receiving circuit 131 and the step-down circuit 133, that is, an output voltage value and/or a current value of the wireless receiving circuit 131. Alternatively, the voltage value and/or current value on the first charging channel 136 may also refer to a voltage value and/or a current value between the buck circuit 133 and the battery 135, that is, an output voltage and/or an output current of the buck circuit 133.

In an embodiment, the detection circuit 134 can include a voltage detection circuit 134 and a current detection circuit 134. The voltage detection circuit 134 can be used to sample the voltage on the first charging channel 136 and send the sampled voltage value to the second control circuit 132. In some embodiments, voltage detection circuit 134 can sample the voltage on first charging channel 136 by series voltage division. The current detection circuit 134 can be used to sample the current on the first charging channel 136 and send the sampled current value to the second control circuit 132. In some embodiments, the current sensing circuit 134 can detect the current on the first charging channel 136 by a current-sense resistor and a galvanometer.

In an embodiment, the second control circuit 132 is configured to communicate with the first control circuit 122 of the wireless charging device, and the detection circuit 134 detects the voltage value and/or the current value to be fed back to the first control circuit 122. Therefore, the first control circuit 122 can adjust the transmit power of the wireless transmit circuit 121 according to the feedback voltage value and/or the current value, so that the voltage value and/or the current value of the direct current output from the first charging channel 136 and the battery 135 The required charging voltage value and/or current value match.

It should be understood that, in an embodiment of the present disclosure, "matching the charging voltage value and/or current value required for the battery 135" includes: the voltage value and/or current value of the direct current output from the first charging channel 136 and the battery 135 The required charging voltage value and/or current value are equal or floating preset ranges (eg, the voltage value floats up and down from 100 millivolts to 200 millivolts).

In the embodiment of the present disclosure, the implementation of the step-down circuit 133 can be various. As an example, the buck circuit 133 can be a Buck circuit. As another example, the buck circuit 133 can be a charge pump. The charge pump is composed of a plurality of switching devices, and the heat generated by the current flowing through the switching device is small, and is almost equivalent to the current directly passing through the wire. Therefore, the charge pump is used as the step-down circuit 133, which not only can reduce the voltage, but also has a low heat generation. . As an example, the buck circuit 133 can also be a half voltage circuit.

In one embodiment, the boosting factor of the voltage conversion circuit 123 of the wireless charging device 120 and the step-down factor of the step-down circuit 133 of the device 130 to be charged 130 are set and the output voltage that the power supply device can provide, and the charging required by the battery 135. The voltage and other parameters are related to each other, and the two may be equal or not equal to each other.

As an example, the boosting factor of the voltage conversion circuit 123 and the step-down factor of the step-down circuit 133 can be set equal. For example, the voltage conversion circuit 123 may be a voltage multiplying circuit for boosting the output voltage of the power supply device by a factor of two; the step-down circuit 133 may be a half voltage circuit for reducing the output voltage of the wireless receiving circuit 131 by half.

In this embodiment, the boosting multiple of the voltage conversion circuit 123 and the step-down multiple of the step-down circuit 133 are set to 1:1. This arrangement can make the output voltage and output current of the step-down circuit 133 and the power supply respectively. The output voltage of the device is consistent with the output current, which is beneficial to simplify the implementation of the control circuit. Taking the requirement of the charging current of the battery 135 as 5A, when the second control circuit 132 knows that the output current of the step-down circuit 133 is 4.5A through the detecting circuit 134, it is necessary to adjust the output power of the power supply device so that the step-down circuit 133 The output current reaches 5A. If the ratio of the boosting multiple of the voltage conversion circuit 123 to the step-down factor of the step-down circuit 133 is not equal to 1:1, the first control circuit 122 or the second control circuit 132 needs to be based on the adjustment of the output power of the power supply device. The difference between the current output current of the step-down circuit 133 and the expected value recalculates the adjustment value of the output power of the power supply device. In an embodiment of the present disclosure, the ratio of the boosting multiple of the voltage conversion circuit 123 to the step-down factor of the step-down circuit 133 is set to 1:1, and the second control circuit 132 notifies the first control circuit 122 to increase the output current to 5A. Yes, which simplifies the feedback adjustment of the wireless charging path.

Referring to FIG. 4 , in an embodiment of the present disclosure, the device to be charged 130 further includes: a second charging channel 138 . The second charging channel 138 can be a wire. A conversion circuit 137 is provided on the second charging channel 138 for voltage control of the direct current output from the wireless receiving circuit 131 to obtain an output voltage and an output current of the second charging channel 138 to charge the battery 135.

In one embodiment, transform circuit 137 includes circuitry for voltage regulation and circuitry for achieving constant current and constant voltage. The circuit for voltage regulation is connected to the wireless receiving circuit 131, and the circuit for realizing constant current and constant voltage is connected to the battery 135.

When the battery 135 is charged by the second charging channel 138, the wireless transmitting circuit 121 can adopt a constant transmitting power, and after receiving the electromagnetic signal, the wireless receiving circuit 131 is processed by the converting circuit 137 to satisfy the voltage and current required for the charging of the battery 135. The input battery 135 enables charging of the battery 135. It should be understood that in some embodiments, the constant transmit power does not have to be that the transmit power remains completely unchanged, which may vary over a range, for example, the transmit power is 7.5 W up and down by 0.5 W.

In an embodiment, when the battery 135 is charged through the second charging channel 138, the wireless charging device and the device to be charged can be wirelessly charged in accordance with the Qi standard.

In an embodiment of the present disclosure, a voltage conversion circuit 123 is provided at the wireless charging device end. A first charging channel 136 (eg, a wire) connected to the battery 135 is disposed at the device to be charged. The first charging channel 136 is provided with a step-down circuit 133 for stepping down the output voltage of the wireless receiving circuit 131 so that the output voltage and the output current of the first charging channel 136 satisfy the charging requirement of the battery 135.

In one embodiment, if the wireless charging device 120 charges the single cell battery 135 in the device to be charged with an output power of 20 W, when the single cell 135 is charged by the second charging channel 138, the wireless transmitting circuit The input voltage of 121 needs to be 5V, and the input current needs to be 4A. The current of 4A will inevitably cause the coil to heat up and reduce the charging efficiency.

When the single-cell battery 135 is charged by the first charging path 136, since the step-down circuit 133 is provided on the first charging path 136, in the case where the transmission power of the wireless transmitting circuit 121 does not change (the aforementioned 20 W) The input voltage of the wireless transmitting circuit 121 can be increased, whereby the input current of the wireless transmitting circuit 121 can be reduced.

In an embodiment of the present disclosure, the step-down circuit 133 can employ a half voltage circuit, that is, the ratio of the input voltage to the output voltage of the step-down circuit 133 is a fixed 2:1 to further reduce the heat generation of the step-down circuit 133. .

In an embodiment, the wireless charging device 120 can be configured in various shapes, such as a circle, a square, or the like.

In an embodiment, a number of other communication information may also be interposed between the first control circuit 122 and the second control circuit 132. In some embodiments, information between the first control circuit 122 and the second control circuit 132 may be used for security protection, anomaly detection, or fault handling, such as temperature information of the battery 135, entering overvoltage protection or overcurrent protection. Information such as information, power transmission efficiency information (this power transmission efficiency information can be used to indicate power transmission efficiency between the wireless transmission circuit 121 and the wireless reception circuit 131).

For example, when the temperature of the battery 135 is too high, the first control circuit 122 and/or the second control circuit 132 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 122 receives the indication information of the overvoltage protection or the overcurrent protection sent by the second control circuit 132, the first control circuit 122 may reduce the transmission power or control the wireless transmission circuit 121 to stop operating. For example, after the first control circuit 122 receives the power transmission efficiency information sent by the second control circuit 132, if the power transmission efficiency is lower than the preset threshold, the wireless transmitting circuit 121 can be controlled to stop working, and notify the user of the event, such as The power transmission efficiency is too low through the display, or the power transmission efficiency can be indicated by the indicator light, so that the user can adjust the wireless charging environment.

In some embodiments, the first control circuit 122 and the second control circuit 132 may interact with other information that can be used to adjust the transmit power adjustment of the wireless transmit circuit 121, such as temperature information of the battery 135, indicating the first charging channel 136. Information on the peak or average of the voltage and/or current, power transmission efficiency information (which can be used to indicate the power transmission efficiency between the wireless transmitting circuit 121 and the wireless receiving circuit 131), and the like.

For example, the second control circuit 132 may transmit power transmission efficiency information to the first control circuit 122, and the first control circuit 122 is further configured to determine an adjustment range of the transmission power of the wireless transmission circuit 121 according to the power transmission efficiency information. Specifically, if the power transmission efficiency information indicates that the power transmission efficiency between the wireless transmission circuit 121 and the wireless reception circuit 131 is low, the first control circuit 122 may increase the adjustment range of the transmission power of the wireless transmission circuit 121, so that the wireless transmission circuit The transmit power of 121 quickly reaches the target power.

For another example, if the wireless receiving circuit 131 outputs the voltage and/or current of the pulsating waveform, the second control circuit 132 may send a peak to the first control circuit 122 indicating the output voltage and/or output current of the first charging channel 136 or The information of the mean value, the first control circuit 122 can determine whether the peak value or the average value of the output voltage and/or the output current of the first charging channel 136 matches the current charging voltage and/or charging current required by the battery 135, if not, Then, the transmission power of the wireless transmission circuit 121 can be adjusted.

For another example, the second control circuit 132 can send the temperature information of the battery 135 to the first control circuit 122. If the temperature of the battery 135 is too high, the first control circuit 122 can reduce the transmission power of the wireless transmission circuit 121 to reduce the wireless receiving circuit. The output current of 131 reduces the temperature of the battery 135.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical idea of the present disclosure. These simple variations are all within the scope of the disclosure.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure is applicable to various possibilities. The combination method will not be described separately.

In addition, any combination of various embodiments of the present disclosure may be made as long as it does not deviate from the idea of the present disclosure, and should also be regarded as the disclosure of the present disclosure.

During the charging process, when the transmitting coil of the wireless charging device 120 and the receiving coil of the device to be charged 130 are spatially aligned, the charging efficiency is the highest. However, the transmitting coil is generally disposed at a fixed position in the wireless charging device 120, which allows the user to locate the position to align the transmitting coil and the receiving coil when placing the device to be charged 130 on the wireless charging device 120. Once the position is deviated, the charging efficiency will decrease, which will seriously affect the user experience.

Therefore, in order to solve the problem, the embodiment of the present application will provide an adjustment mechanism in the wireless charging device 120, which can adjust the position of the transmitting coil in the wireless charging device 120.

As shown in FIG. 5, the wireless charging device 200 can include a first rail 210, a transmitting coil 220, and a driving portion 230. Specifically, the driving portion 230 is configured to: drive the movement of the first rail 210, and drive the transmitting coil 220 to move along the first rail 210; the transmitting coil 220 is configured to: emit an electromagnetic signal to be disposed on the receiving coil The device to be charged is wirelessly charged.

The transmitting coil 220 may be disposed at any position within the wireless charging device 200, and may move within the wireless charging device 200 by driving of the driving portion, and may perform the device to be charged provided with the receiving coil at any position within the range of motion. Wireless charging.

It should be understood that the transmitting coil 220 in the embodiment of the present application may also be referred to as a transmitting antenna. Correspondingly, the receiving coil of the embodiment of the present application may also be referred to as a receiving antenna.

The embodiment of the present application does not specifically limit the configuration of the transmitting coil 220 and the receiving coil. For example, the transmitting coil 220 or the receiving coil may be circular, square or elliptical or the like.

In addition, the moving area of the transmitting coil 220 may be any shape, such as a circular shape, a square shape, or an elliptical shape. Correspondingly, the charging range of the wireless charging device 200 may also be any shape. Moreover, the moving area of the transmitting coil 220 may be smaller than or equal to the area occupied by the housing of the wireless charging device 200, and the shape may be the same as or different from the shape of the housing.

The driving portion 230 can adjust the position of the transmitting coil 220 within the housing of the wireless charging device 200 by driving the first rail 210 to move and driving the transmitting coil 220 to move.

Therefore, in the embodiment of the present application, a movable rail is disposed in the wireless charging device, and the driving portion can control the movement of the rail and control the movement of the transmitting coil in the rail, thereby adjusting the position of the transmitting coil in the wireless charging device, thereby Automatic calibration of the position of the transmitting coil to improve charging efficiency and enhance the user experience.

In order to more clearly understand the present application, the wireless charging device of the present application will be described below in conjunction with specific embodiments.

FIG. 6 shows a schematic diagram of a wireless charging device in accordance with an embodiment of the present application. As shown in FIG. 6, the wireless charging device 300 (which may be the charging device 200 shown in FIG. 5) may include a first rail 311, a transmitting coil 340, and a driving portion (not shown). The first rail 311 can be moved in a plane in the wireless charging device 300. For example, the first rail 311 can be circularly moved around the center line in FIG. 6; the center position of the transmitting coil 340 is 341, and the transmitting coil 340 can be along The first guide rail 311 is moved. For example, a first connecting portion may be disposed at a central position 341 of the transmitting coil 340, and the first connecting portion may be a slider by the first connecting portion.

Optionally, the wireless charging device 300 can further include a first traction line 312 through which the transmitting coil 340 is pulled to move along the first rail 311.

Specifically, the wireless charging device 300 may further include a first spring 313, wherein one end of the first spring 313 is connected to one end of the first traction wire 312, and the other end of the first spring 313 is opposite to the other end of the first rail 311. 314 is fixed. In addition, the driving portion of the wireless charging device 300 may include at least one motor 330. The at least one motor 330 may include a first motor (not shown), and the other end of the first traction wire 312 passes through the first rail. One end of the 311 is connected to the first motor.

Moreover, the center position 341 of the transmitting coil 340 is moved along the first rail 311 through the first connecting portion, and the first connecting portion can be disposed on the first pulling line 312 or the first spring 313, and the transmitting coil 340 can pass the The first pull wire 312 and the first spring 313 are moved along the first rail 311 under the driving of the first motor. Wherein, the first connecting portion is disposed at a connection point of the first pulling line 312 and the first spring 313, or the first connecting portion is directly connected only to the first pulling line 312, or the first connecting portion is only directly It is connected to the first spring 313.

Optionally, the first rail 311 in the embodiment of the present application may be provided with a slot, and the first connecting portion may have a protrusion extending into the slot, and the protrusion may be coupled to the first traction line 312 or the first spring 313. The movement of the first traction line 312 or the first spring 313 is coupled to move the first connection portion.

It should be understood that the motion track of the first rail 311 may be a straight line or a curved shape, as shown in FIG. 6 , where the circular motion of the first rail 311 is taken as an example for description. The movement trajectory of one end 314 of the first guide rail 311 is circular. Specifically, the wireless charging device 300 further includes a second traction line 322 for pulling the first guide rail 311 to move. The wireless charging device 300 can further include a second spring 323. One end of the second pulling wire 322 is connected to one end of the second spring 323, and the other end of the second spring 323 is fixed at any point 324 in the plane. The fixing point 324 can be It is disposed on the movement track 321 of the first guide rail 311 as shown in FIG. 6, and may be disposed at other positions. In addition, the at least one motor 330 included in the driving portion of the wireless charging device 300 may further include a second motor (not shown), and the other end of the second pulling wire 322 is connected to the second motor, wherein the second pulling wire The 322 can also be connected to the second motor by bypassing any turning point 325. The turning point 325 can be disposed on the movement track 321 of the first rail 311 as shown in FIG. 6, or can be disposed at other positions.

The first rail 311 is disposed on the second traction line 322 or the second spring 323 through the second connecting portion, so that the first rail 311 is driven by the second pulling line 322 and the second spring 323, the second connection The portion may be located at any position of the first rail 311. For example, the second connecting portion may be located at one end 314 of the first rail 311.

In view of the efficiency of pulling the movement of the first rail 311, a second rail may be disposed in the wireless charging device 300 to facilitate movement of the first rail 311 along the second rail. Specifically, taking FIG. 6 as an example, the ring 321 in FIG. 6 represents the second guide rail 321.

Specifically, the wireless charging device 300 includes a non-parallel first rail 311 and a second rail 321; wherein the second rail 321 is fixed in position relative to the wireless charging device 300, and the transmitting coil 340 is disposed on the first rail 311, for example The center 341 of the transmitting coil 340 moves on the first rail 311, that is, the transmitting coil 340 moves along the first rail 311, the driving portion for driving the first rail 311 to move along the second rail 321, and the driving transmitting coil 340 along the first The guide rail 311 moves.

Optionally, the wireless charging device 300 may further include a first traction line 312, a first spring 313, and a first motor as described above, and details are not described herein.

Optionally, the wireless charging device 300 further includes a second pulling line 322 for pulling the first rail 311 to move along the second rail 321 . The wireless charging device 300 may further include a second spring 323. One end of the second pulling wire 322 is connected to one end of the second spring 323, and the other end of the second spring 323 is fixed at one end 324 of the second guiding wire 321. In addition, the at least one motor 330 included in the driving portion of the wireless charging device 300 may further include a second motor (not shown), and the other end of the second pulling wire 322 is connected to the second motor, wherein the second pulling wire The 322 can also be coupled to the second motor about the other end 325 of the second rail 321 .

The first rail 311 is moved on the second rail 321 by the second connecting portion. The second connecting portion may be disposed on the second pulling line 322 or the second spring 323 such that the first rail 311 is on the second pulling line 322. And the second spring 323 is driven to move along the second rail 321 . Alternatively, the second connecting portion may be a slider.

Wherein, the second connecting portion may be disposed at a junction of the second pulling line 322 and the second spring 323, or the second connecting portion is directly connected only to the second pulling line 322, or the second connecting portion It is only directly connected to the second spring 323.

Optionally, the second rail 321 in the embodiment of the present application may be provided with a slot, and the first connecting portion between the first rail 311 and the second rail 321 may have a protrusion extending into the slot, the protrusion It may be coupled to the second pull wire 322 or the second spring 323 such that the movement of the second pull wire 322 or the second spring 323 may drive the movement of the first joint.

It should be understood that, as shown in FIG. 6, the shape of the second rail 321 may be a circular arc or a circular shape. When the second rail 321 is arc-shaped, one end of the second rail 321 is 324, and another One end is 325, that is, the second rail 321 can be any arc of a circle on the ring as shown in FIG. 6; when the second rail 321 is circular, one end 324 and the other end 325 of the second rail 321 are A point of coincidence, that is, any point on the circular second rail 321 .

Optionally, in the embodiment of the present application, the first motor that pulls the first traction line 312 and the second motor that pulls the second traction line 322 may be different motors. In this case, the different motors may alternately operate. That is, when the first rail 311 moves, for example, when moving along the second rail 321 , the first motor operates, and the second motor does not operate, the transmitting coil 340 does not move along the first rail 311; When the transmitting coil 340 moves along the first rail 311, the second motor operates, and the first motor does not operate, the first rail 311 does not move.

Optionally, in the embodiment of the present application, the motor that pulls the first traction line 312 or the second traction line 322 may also be the same motor. The same motor included in the wireless charging device 300 in the embodiment of the present application may also be used. A switching portion is included that can cause the motor to switch between driving the first pull line 312 and the second pull line 322.

For example, as shown in FIG. 6, the switching portion may include a first gear 331, a second gear 332, and a third gear 333. One end of the first traction wire 312 is connected to the first gear 331, and one end of the second traction wire 322 is connected. The second gear 332 is provided with a third gear 333 at a main body portion of the motor 330, and the third gear 333 is meshed with the first gear 331 and the second gear 332, respectively.

Specifically, when the third gear 333 is engaged with the first gear 331 , the third gear 333 is not in contact with the second gear 332 , and the first traction wire 312 can be driven by the rotation of the motor. The first traction line 312 is extended or shortened; when the third gear 333 is engaged with the second gear 332, the third gear 333 is not in contact with the first gear 331, and the second traction line 322 can be driven by the rotation of the motor. Under the action of the second spring 323, the second traction line 322 in the second rail 321 can be extended or shortened.

Therein, a moving member (not shown) may be provided on the motor for moving the third gear 333 such that the third gear 333 is meshed with the first gear 331 and the second gear 332, respectively.

Alternatively, a moving member (not shown) may be disposed on the wireless charging device 300 for moving the first gear 331 or the second gear 332 such that the first gear 331 or the second gear 332 meshes with the third gear 333.

It should be understood that the switching part of the embodiment of the present application may be other implementation forms, which is not specifically limited in this embodiment of the present application.

It should be understood that, as shown in FIG. 3, the first guide rail 311 is a linear guide rail, and one end of the first guide rail 311 may be fixed at a center of a circular arc or a circle corresponding to a motion track thereof, for example, one end of the first guide rail 311. The center of the circle where the second guide rail 321 is located can be fixed.

Therefore, in the solution shown in FIG. 6, the first motor can pull one end of the first traction line 312, so that the first traction line 312 in the first rail 311 is shortened, so that the transmitting coil 340 can be driven along the first rail 311. Moving in the first direction (for example, the horizontal leftward direction as shown in FIG. 6), the first motor can be rotated in the reverse direction so that the first traction line 312 in the first rail is extended, so that the first spring 313 can be made The reset, that is, the transmission coil 340 can be moved in a second direction opposite to the first direction (for example, a horizontal rightward direction as shown in FIG. 6).

And the second motor can pull one end of the second traction wire 322 to shorten the second traction wire 322, so that the first rail 311 can be moved in a third direction (for example, a clockwise direction as shown in FIG. 6). The two motors can be rotated in the reverse direction, so that the second pull wire 322 is extended, so that the second spring 323 can be reset, that is, the first guide rail 311 can be driven in a fourth direction opposite to the third direction (for example, as shown in FIG. 6). Move counterclockwise as shown).

It should be understood that the first spring 313 in FIG. 6 may be replaced by other implementations, for example, the first spring 313 may be replaced by another traction line connected to another motor, and the other motor may pull the One end of the other traction wire shortens the length of the first traction wire 312 in the first guide rail 311, so that the transmission coil 340 can be moved.

And, the second spring 323 in FIG. 6 can also be replaced by other implementations. For example, the second spring 323 can be replaced by another traction line connected to another motor, and the other motor can pull the The other end of the traction wire shortens the length of the second traction wire 322, so that the first guide rail 311 can be moved.

The first guide rail 311 shown in FIG. 6 is a linear guide rail, which is driven by the second traction line 322 to perform circular motion, or along the movement of the second guide rail 321, and the second guide rail 321 is a circular arc or a circular guide rail. In this case, the moving area of the transmitting coil 340 may be fan-shaped or circular.

It should be understood that the first rail 311 and/or the second rail 321 may also be rails of other shapes.

For example, the first rail 311 may be a linear guide, and the first rail 311 is translated, and correspondingly, the moving area of the transmitting coil 340 is quadrangular.

Alternatively, the first rail 311 may be a linear rail, and the second rail 321 may also be a linear rail. In this case, the moving area of the transmitting coil 340 is also quadrangular. Alternatively, the first rail 311 and the second rail 321 may be perpendicular to each other, and the moving area of the transmitting coil 340 is rectangular.

Alternatively, the first rail 311 is another irregularly shaped rail, and/or the second rail 321 may be other irregularly shaped rails.

Another specific form of the wireless charging device will be described below with reference to FIG.

FIG. 7 shows a schematic diagram of a wireless charging device in accordance with an embodiment of the present application. As shown in FIG. 7, the wireless charging device 400 (which may be the charging device 200 shown in FIG. 5) may include a first rail 411, a transmitting coil 440, and a driving portion (not shown), which is a linear guide. The first rail 411 can be moved in the plane in the wireless charging device 400. For example, the first rail 411 can be translated in the vertical direction in FIG. 7; the center position of the transmitting coil 440 is 441, and the transmitting coil 440 can be along the first The guide rail 411 is moved. For example, a first connecting portion may be disposed at a center position 441 of the transmitting coil 440, and the first connecting portion may be a slider by the first connecting portion.

Optionally, the wireless charging device 400 can further include a first pull line 412 through which the transmit coil 440 is pulled to move along the first guide rail 411.

Specifically, the wireless charging device 400 may further include a first spring 413, wherein one end of the first spring 413 is connected to one end of the first pull wire 412, and the other end of the first spring 413 is opposite to the other end of the first rail 411. 414 is fixed. In addition, the driving portion of the wireless charging device 400 may include at least one motor 430. The at least one motor 430 may include a first motor (not shown), and the other end of the first traction wire 412 passes through the first rail. One end of 411 is connected to the first motor.

Moreover, the center position 441 of the transmitting coil 440 is moved along the first rail 411 through the first connecting portion, and the first connecting portion can be disposed on the first pulling line 412 or the first spring 413, and the transmitting coil 440 can pass the The first pull wire 412 and the first spring 413 are moved along the first rail 411 under the driving of the first motor. Wherein, the first connecting portion is disposed at a connection point of the first pulling line 412 and the first spring 413, or the first connecting portion is directly connected only to the first pulling line 412, or the first connecting portion is only directly It is connected to the first spring 413.

Optionally, the first rail 411 in the embodiment of the present application may be provided with a slot, and the first connecting portion may have a protrusion extending into the slot, and the protrusion may be coupled to the first traction line 412 or the first spring 413. The movement of the first traction line 412 or the first spring 413 is coupled to move the first connection.

It should be understood that the motion track of the first rail 411 may be a straight line or a curved shape, as shown in FIG. 7 , where the first rail 411 is translated as an example, and the corresponding line of 421 in FIG. 7 indicates the first line. The guide rail 411 is entirely translated along the straight line, and the corresponding formed motion trajectory is a quadrilateral shape. Specifically, the wireless charging device 400 further includes a second pull line 422 for pulling the first guide rail 411 to move. The wireless charging device 400 can further include a second spring 423. One end of the second pulling wire 422 is connected to one end of the second spring 423, and the other end of the second spring 423 is fixed at any point 424 in the plane. The fixing point 424 can be It is disposed on the movement track 421 of the first guide rail 411 as shown in FIG. 7, and may be disposed at other positions. In addition, the at least one motor 430 included in the driving portion of the wireless charging device 400 may further include a second motor (not shown), and the other end of the second pulling wire 422 is connected to the second motor, wherein the second pulling wire The 422 can also be connected to the second motor by bypassing any turning point 425. The turning point 425 can be disposed on the moving track 421 of the first rail 411 as shown in FIG. 7 or can be disposed at other positions.

In addition, since the length of the second pull wire 422 may be long, other at least one turning point may be disposed at other positions, such as the turning point 426 as shown in FIG. 7, and the embodiment of the present application is not limited thereto.

The first rail 411 is disposed on the second pull wire 422 or the second spring 423 through the second connecting portion, so that the first rail 411 is driven by the second pull wire 422 and the second spring 423, the second connection The portion may be located at any position of the first rail 411. For example, the second connecting portion may be located at one end 414 of the first rail 411 or at a midpoint of the first rail 411.

In view of the efficiency of pulling the movement of the first rail 411, a second rail may be disposed in the wireless charging device 400 to facilitate movement of the first rail 411 along the second rail. Specifically, taking FIG. 7 as an example, the straight line 421 in FIG. 7 represents the second guide rail 421, that is, the second guide rail 421 is a linear guide rail.

Specifically, the wireless charging device 400 includes a non-parallel first rail 411 and a second rail 421; wherein the second rail 421 is fixed in position relative to the wireless charging device 400, and the transmitting coil 440 is disposed on the first rail 411, for example The center 441 of the transmitting coil 440 moves on the first rail 411, that is, the transmitting coil 440 moves along the first rail 411, the driving portion drives the first rail 411 to move along the second rail 421, and drives the transmitting coil 440 along the first The guide rail 411 moves.

Optionally, the wireless charging device 400 may further include a first traction line 412, a first spring 413, and a first motor as described above, and details are not described herein again.

Optionally, the wireless charging device 400 further includes a second pull line 422 for pulling the first rail 411 to translate along the second rail 421. The wireless charging device 400 may further include a second spring 423. One end of the second pulling wire 422 is connected to one end of the second spring 423, and the other end of the second spring 423 is fixed at one end 424 of the second guiding rail 421. In addition, the at least one motor 430 included in the driving portion of the wireless charging device 400 may further include a second motor (not shown), and the other end of the second pulling wire 422 is connected to the second motor, wherein the second pulling wire 422 can also be coupled to the second motor about the other end 425 of the second rail 421.

The first rail 411 is moved on the second rail 421 by the second connecting portion, and the second connecting portion may be disposed on the second pulling line 422 or the second spring 423 such that the first rail 411 is on the second pulling line 422. And the second spring 423 is driven to move along the second rail 421. Alternatively, the second connecting portion may be a slider.

Wherein, the second connecting portion may be disposed at a connection of the second pulling line 422 and the second spring 423, or the second connecting portion is directly connected only to the second pulling line 422, or the second connecting portion It is only directly connected to the second spring 423.

Optionally, the second rail 421 in the embodiment of the present application may be provided with a slot, and the first connecting portion between the first rail 411 and the second rail 421 may have a protrusion extending into the slot, the protrusion The second pull wire 422 or the second spring 423 can be coupled such that the movement of the second pull wire 422 or the second spring 423 can drive the movement of the first connecting portion.

Optionally, in the embodiment of the present application, the first motor that pulls the first traction line 412 and the second motor that pulls the second traction line 422 may be different motors. In this case, the different motors may alternately operate. That is, when the first rail 411 moves, for example, when moving along the second rail 421, the first motor operates, and the second motor does not operate, the transmitting coil 440 does not move along the first rail 411; or, When the transmitting coil 440 moves along the first rail 411, the second motor operates, and the first motor does not operate, the first rail 411 does not move.

Optionally, in the embodiment of the present application, the motor that pulls the first traction line 412 or the second traction line 422 may also be the same motor. The same motor included in the wireless charging device 400 in the embodiment of the present application may also be used. A switching portion is included that can cause the motor to switch between driving the first pull line 412 and the second pull line 422.

For example, as shown in FIG. 7, the switching portion may include a first gear 431, a second gear 432, and a third gear 433. One end of the first traction wire 412 is connected to the first gear 431, and one end of the second traction wire 422 is connected. The second gear 432 is provided with a third gear 433 at the motor main body portion of the motor 430, and the third gear 433 is meshed with the first gear 431 and the second gear 432, respectively.

Specifically, when the third gear 433 is engaged with the first gear 431, the third gear 433 is not in contact with the second gear 432, and the first traction wire 412 can be driven by the rotation of the motor. Under the joint action of the first spring 413, The first traction line 412 in the first rail 411 is extended or shortened; when the third gear 433 is engaged with the second gear 432, the third gear 433 is not in contact with the first gear 431, and the second traction line 422 can be driven by the rotation of the motor. The second pull wire 422 in the second rail 421 can be extended or shortened by the cooperation of the second spring 423.

Therein, a moving member (not shown) may be provided on the motor for moving the third gear 433 such that the third gear 433 meshes with the first gear 431 and the second gear 432, respectively.

Alternatively, a moving member (not shown) may be disposed on the wireless charging device 400 for moving the first gear 431 or the second gear 432 such that the first gear 431 or the second gear 432 meshes with the third gear 433.

Therefore, in the solution shown in FIG. 7, the first motor can pull one end of the first traction wire 412 such that the first traction wire 412 in the first rail 411 is shortened, so that the transmitting coil 440 can be driven along the first rail 411. Moving in the first direction (for example, the horizontal leftward direction as shown in FIG. 7), the first motor can be rotated in the reverse direction so that the first traction line 412 in the first rail is extended, so that the first spring 413 can be made The reset, that is, the transmission coil 440 can be moved in a second direction opposite to the first direction (for example, a horizontal rightward direction as shown in FIG. 7).

And the second motor can pull one end of the second pull wire 422 to shorten the second pull wire 422, so that the first rail 411 can be driven to move in a third direction (for example, a vertical upward direction as shown in FIG. 7). The second motor can be rotated in the reverse direction, so that the second pull wire 422 is extended, so that the second spring 423 can be reset, that is, the first guide rail 411 can be driven along the fourth direction opposite to the third direction (for example, as shown in FIG. 7). The vertical downward direction shown) moves.

It should be understood that the first spring 413 in FIG. 7 may be replaced by other implementations, for example, the first spring 413 may be replaced by another traction line that is connected to another motor that can pull the other motor One end of the other traction wire shortens the length of the first traction wire 412 in the first guide rail 411, so that the transmission coil 440 can be moved.

And, the second spring 423 in FIG. 7 can also be replaced by other implementations, for example, the second spring 423 can be replaced by another traction line that is connected to another motor that can pull the other motor One end of the other pull wire shortens the length of the second pull wire 422, so that the first guide rail 411 can be moved.

Since the charging efficiency of the device to be charged is related to the positional relationship of the transmitting coil and the receiving coil of the device to be charged. Therefore, the position of the receiving coil of the device to be charged can be determined, and the position of the transmitting coil in the wireless charging device can be adjusted based on the position of the receiving coil.

For example, the wireless charging device 200 may further include a processor, by which the position of the receiving coil of the device to be charged is determined, and considering the range of motion of the transmitting coil of the wireless charging device, it may be determined that the range of motion is to be charged. The receiving coil of the device is located at the target position, so that the driving device 230 moves the transmitting coil 220 to the target position by driving the first rail 210 and the transmitting coil 220, and transmits an electromagnetic signal at the target position to perform wireless charging on the charging device. .

How to determine the position of the receiving coil will be described below in connection with several implementations.

In an implementation manner, the wireless charging device 200 may further include an infrared heat sensing portion, configured to perform infrared heat sensing within the range of motion of the transmitting coil to obtain heat of the device to be charged when the device to be charged is being charged. And outputting an infrared thermal sensing result to the processor, so that the processor determines, according to the infrared thermal sensing result, a target position at which the receiving coil of the device to be charged is located.

The collected infrared heat sensing results can be embodied in the form of a heat cloud image, and the heat cloud image reflects the heat generation of each part. The heat cloud image can also be called a thermal imaging cloud image or a temperature cloud image.

It should be understood that the infrared heat sensing portion may be a temperature sensor, such as an infrared thermal sensor, which may be fixed under the transmitting coil and maintained at a certain distance. Wherein, the distance can be determined according to the surface area of the wireless charging device for placing the device to be charged, thereby ensuring that the range of infrared heat sensing covers the range of motion of the transmitting coil as much as possible. For example, as shown in FIG. 8, assuming that the wireless charging base 520 is circular and the transmitting coil 521 can be moved to any position of the wireless charging base 520, the infrared thermal sensing portion of the infrared thermal sensing portion 523 includes the entire wireless charging base 520.

Optionally, the processor may determine, according to the preset information and the infrared heat sensing result, a target location of the receiving coil, where the preset information includes each known part of the to-be-charged device at a specific charging phase and/or charging efficiency. A heating feature that is obtained by the infrared thermal sensor is a heating characteristic at the particular charging phase and/or charging efficiency.

Specifically, a heat generation cloud map of the device to be charged at each charging phase and/or charging efficiency may be collected, and the heat generating cloud map may include information such as a highest temperature point and a heat generating region, and establish a database. The database information may be input into the wireless charging device, and the position of the device to be charged corresponding to each part of the heat generating cloud image is known, and the processor may be combined with a preset heat cloud image at a specific efficiency and/or charging efficiency, and The heat generation cloud map of the device to be charged at a specific charging phase and/or charging efficiency determines the target position of the receiving coil.

The processor determines, according to the preset information and the heat generating feature of the device to be charged, a specific transmitting feature at a position corresponding to the device to be charged; determining the receiving coil according to a specific transmitting feature at a position corresponding to the device to be charged. The target location.

That is, the specific heating characteristic in the heat generation cloud image of the device to be charged acquired by the infrared heat sensing portion at a specific charging phase and/or charging efficiency is set to be preset with the specific charging phase and/or charging efficiency. The heating feature matching in the heat cloud image determines the position of the matched heat generating feature on the device to be charged based on the preset heat cloud image, and the receiving coil is fixed for the position having the specific heat generating feature, so that the position can be determined based on the position Receive the position of the coil.

The device to be charged and the device to be charged that determines the receiving coil in real time in the preset information may be the same device to be charged or the device to be charged in the same model.

Hereinafter, the device to be charged is used as a mobile phone and will be described with reference to FIG. 8 as an example.

First, the thermal imaging cloud image of the mobile phone 510 can be modeled, and the thermal cloud image of the mobile phone 510 under various charging efficiency and/or charging phases of the wireless charging can be collected, and the heating characteristics of the mobile phone 510, such as the highest temperature point and the heating area, can be collected. Information, and a database is created and entered into the wireless charging dock 520.

Then, when the mobile phone 510 is placed in the wireless charging base 520, in the initial position, the receiving coil 511 of the mobile phone 510 and the transmitting coil 521 of the base 520 may be misaligned, so that the charging efficiency is relatively low, and the receiving coil is kept for a period of time. After the heat of the 511 and the mobile phone 510 is stabilized, the infrared heat sensor can be turned on for detection, the heat cloud image of the mobile phone 510 is obtained, and the heat generation characteristics in the database are compared, and the position of a heat generating feature point on the coordinates of the base 520 is obtained, because the mobile phone 510 The upper receiving coil 511 is fixed relative to the position of the heat generating feature point, so that the position of the receiving coil center point 512 of the mobile phone 510 can be calculated by the hot feature point. If the rectangular charging system is established in the wireless charging base 520, It is determined that the coordinates of the handset center point 512 of the handset 510 are (x1, y1).

At this time, the center position of the transmitting coil 522 of the wireless charging base 520 may be located at another point of the wireless charging base 520. For example, if the coordinates of the transmitting coil center 522 are (x0, y0), the driving part of the wireless charging device is driven. The transmitting coil 521, the transmitting coil center 522 moves from (x0, y0) to (x1, y1), so that the center 522 of the transmitting coil coincides with the receiving center point 512 of the handset 510, so that the transmitting coil 521 emits electromagnetic at the position. Signal to charge the phone 510.

In an implementation manner, the wireless charging device may further include a pressure sensing portion for performing pressure sensing on a portion of the wireless charging device that carries the device to be charged, and outputting a pressure sensing result to the processor; As a result, the area in which the device to be charged is located is determined, and the target position of the receiving coil is determined according to the area in which the device to be charged is located.

Wherein, the pressure sensing portion may be a pressure sensor, and the pressure sensor may be a resistive pressure sensing screen. The specific structure may be as shown in FIG. 9 , which is a film plus glass structure, and the film and the adjacent side of the glass are coated. With ITO (Nano-Indium Tin Metal Oxide) coating, ITO has good conductivity and transparency. When an object is placed on the surface, the ITO under the film on the contact surface contacts the ITO on the upper layer of the glass (for example, as shown in FIG. 10), and the corresponding electrical signal is transmitted through the inductor and sent to the processing through the conversion circuit. The device is converted into coordinate values by calculation to obtain a pressure sensing region.

It should be understood that the sensing screens shown in Figures 9 and 10 are schematic views, and the sensing screen may have other portions in addition to the film layer, the glass layer, and the ITO.

Optionally, the processor may determine, according to the area where the device to be charged is located, at least one possible position of the receiving coil; adjust the transmitting coil to be respectively aligned with the at least one position, according to each position of the at least one position to be charged The charging efficiency of the device determines the position of the receiving coil. Wherein, the position with the highest charging efficiency in at least one position can be determined as the position of the receiving coil. The calculation formula of the charging efficiency is: η=Pout/Pin, Pout is the power of the device to be charged, and Pin is the power output by the transmitting coil.

Specifically, when the device to be charged is placed on the wireless charging device, the pressure sensing portion can scan the pressure change in any direction, for example, set the direction to the X axis, output the scan result to the processor, and the processor extracts the pressure change. The X coordinate, then the pressure sensing portion scans the pressure change again in the other direction, for example, the direction perpendicular to the X-axis direction, can be set to the Y-axis, and then outputs the scan result to the processor, and the processor extracts the Y coordinate of the pressure change. Further, a pressure change plane is synthesized, so that the placement area of the device to be charged can be determined according to the position corresponding to the pressure change, and the coordinates of the center point of the device to be charged can be defined as (Xt, Yt), and the position of the receiving coil can be further located.

Since the resistance pressure sensing screen does not distinguish the orientation of the device to be charged, the exclusion method can be used to find the position, because the receiving coil is fixed relative to the device to be charged, taking the mobile phone as an example, the position of the receiving coil on the mobile phone is about It is symmetrical, just above or below, that is, the coordinates of the receiving coil relative to the wireless charging device should be (Xt+L, Yt) or (Xt-L, Yt), and the L value is the receiving coil on the mobile phone. Relative to the value of the center point of the mobile phone, the coordinates of the center point of the receiving coil are respectively calculated and moved to the (Xt+L, Yt) position and the wireless charging efficiency at the (Xt-L, Yt) position. The charging efficiency is correct. s position.

Wherein, if the charging efficiency of the last possible position of the adjustment is the highest, it is determined that the last position is the position of the receiving coil, and at this time, the alignment of the receiving coil and the transmitting coil has been achieved, that is, the transmission is not required to be adjusted again. The position of the coil.

Two ways of determining the position of the receiving coil of the device to be charged have been described above, but the embodiment of the present application is not limited thereto.

After determining the position of the receiving coil, the processor can adjust the position of the transmitting coil based on the position of the receiving coil. Wherein, adjusting the position of the transmitting coil may be such that the transmitting coil is away from the receiving coil (for example, when the user desires to perform slow charging of the battery to be charged), or the transmitting coil may be brought close to or aligned with the receiving coil (for example, at the user's wish When the battery of the charging device is quickly charged, specifically, the wireless charging device 300 shown in FIG. 6 or the wireless charging device 400 shown in FIG. 7 may be employed to adjust the position of the transmitting coil.

For example, as shown in FIG. 11, the center 612 coordinates of the determined receiving coil are (x1, y1), and the center 622 coordinates (x0, y0) of the transmitting coil, the transmitting coil 621 can be adjusted such that the center 622 coordinates of the transmitting coil are (x0, y0) moves to (x1, y1).

The position of the transmitting coil is adjusted based on the position of the receiving coil as described above. The embodiment of the present application can also combine the receiving power or charging efficiency of the device to be charged to adjust the position of the transmitting coil in the wireless charging device.

Alternatively, the wireless charging device 200 may further have a communication circuit as shown in FIG. The wireless charging device 200 can perform wireless communication with the device to be charged through the communication circuit to obtain the current received power of the device to be charged.

The device to be charged may be a device to be charged as shown in FIG. 1 to FIG. 4, and the device to be charged may be provided with a detecting circuit for detecting the receiving power of the device to be charged. After acquiring the received power of the device to be charged, the detecting circuit may send the received power to the communication circuit of the wireless charging device through the communication circuit, and may specifically transmit the communication power to the communication circuit of the wireless charging device 200.

After acquiring the received power of the device to be charged, the wireless charging device 200 may directly adjust the position of the transmitting coil 220 according to the received power; or, may calculate the charging efficiency value based on the received power and the transmitting power of the wireless charging device 200, Based on the charging efficiency value, the position of the transmitting coil 220 is adjusted.

Specifically, when the processor adjusts the position of the transmitting coil 220 in the wireless charging device based on the current charging efficiency value, the processor may stop adjusting when adjusting to a specific charging efficiency value, and/or adjust the changing value of the charging efficiency value. Stop adjustment when it is less than the error.

Wherein, the specific charging efficiency value may be a maximum achievable charging efficiency value (that is, a charging efficiency value when the transmitting coil and the receiving coil are coincident), or a charging efficiency value desired by the device to be charged.

The desired received power of the device to be charged may be transmitted by the device to be charged to the wireless charging device 200. Assuming that the device to be charged is a terminal, the user can set a desired received power through the user interface on the terminal and transmit the received power to the wireless charging device 200.

The desired received power of the device to be charged may be less than the current received power. For example, assuming that the device to be charged wishes to slowly charge the battery, the processor may adjust the position of the transmitting coil 220 with the driving portion 230 to reduce the power of the receiving coil. Alternatively, the expected receiving power of the device to be charged may be greater than the current receiving power. For example, if the device to be charged wishes to fast charge the battery, the processor may control the driving portion 230 to adjust the position of the transmitting coil 220 to reduce the power of the receiving coil. .

Optionally, in the embodiment of the present application, since the location of the receiving coil of the device to be charged may also be unknown to the wireless charging device, at this time, the device to be charged may be caused by attempting to move the transmitting coil 220. The received power or charging efficiency value satisfies a predetermined condition.

Specifically, the processor may control the driving portion to adjust the position of the transmitting coil 220 in the wireless charging device according to a change in the received power of the device to be charged or a charging efficiency value during the process of moving the transmitting coil 220.

For ease of understanding, the following description is made by taking an example in which it is desired to achieve maximum charging efficiency.

In one implementation, the driving portion drives the first rail along the second rail to move in a first direction, and if the charging efficiency value increases, continue to drive the first rail along the second rail, according to the first Moving in a direction until the progressive value of the charging efficiency value is less than or equal to the first value, or if the charging efficiency value is decreased, driving the first rail along the second rail, in a direction opposite to the first direction Moving in the two directions, the charging efficiency value will increase, and continue to move along the second direction until the progressive value of the charging efficiency value is less than or equal to the first value.

Optionally, the first value is a minimum step efficiency value when the driving portion drives the first rail to move along the second rail.

Wherein, in the case that the driving portion 230 drives the first rail to move along the second rail, if the progressive value of the charging efficiency value is less than or equal to the first value, and the charging efficiency value does not reach the maximum charging efficiency value The driving portion 230 drives the transmitting coil to move along the first rail to move in the third direction.

Hereinafter, the adjustment mechanism 300 shown in FIG. 6 and FIG. 11 will be described. As shown in FIG. 11, it is assumed that the position of the transmitting coil 621 of the wireless charging base 620 is as shown, the coordinates of the transmitting coil center 622 are (X0, Y0), and the receiving coil 611 of the mobile phone 610 is as shown, and its receiving coil is as shown in FIG. The coordinates of the center 612 (x1, y1). The processor may preset a maximum efficiency value ηmax, which may be the maximum efficiency value defined during the test.

When the mobile phone 610 is initially placed on the wireless charging base 620, the mobile phone 610 can still be wirelessly charged, but the efficiency is relatively low. The wireless charging base 620 can know the power value received by the mobile phone 610 through the communication between the mobile phone 610 and the wireless charging base 620. Then, the processor can calculate the current wireless charging efficiency η0. When η0<ηmax, it indicates that the charging efficiency is relatively low, and the transmitting coil 621 needs to be adjusted. Otherwise, it is not necessary to move the transmitting coil 621; how to proceed when the transmitting coil 621 needs to be moved is described below. The movement of the transmitting coil 621, wherein the transmitting coil 621 shown in Fig. 11 corresponds to the transmitting coil 220 shown in Fig. 6.

Firstly, the third gear 333 is meshed with the second gear 332 to control the stepping motor to operate at an angle Δθ, the second traction line 322 is extended (or shortened) by Δl length, and the transmitting coil 220 is rotated circumferentially, and the efficiency at the position is calculated at this time. The value η1, if η1>η0, indicates that the transmitting coil 220 is running in the correct direction and can continue to adjust along the circumferential direction; if η1 < η0, the transmitting coil is in the opposite direction of operation and needs to be adjusted in the opposite circumferential direction; until it is adjusted to ηt and ηt- The difference of 1 is less than the minimum step efficiency value, indicating that the position is appropriate and no further adjustment is needed.

Then, the third gear 333 is meshed with the first gear 331 to control the running angle of the stepping motor, the first traction line 312 is extended (or shortened) by Δl length, and the transmitting coil is moved on the first guide rail 311, and the position is calculated at this time. The efficiency value η1, if η1>η0, indicates that the transmitting coil 220 moves in the correct direction and can continue to adjust along the direction; if η1 < η0, the transmitting coil 220 moves in the wrong direction and needs to be adjusted in the opposite direction; until it is adjusted to ηt and ηt The difference of -1 is less than the minimum step efficiency value, at which point the position is already at the maximum efficiency and the coil is aligned.

It is described that the movement of the first rail can be driven first. If the value of the charging efficiency is not satisfied, the driving coil is continuously driven to move along the first rail. However, the embodiment of the present application is not limited thereto, and the transmitting coil may be driven first. A guide rail moves, and if the charging efficiency value is not up to the desired value, the first rail is driven to move.

Specifically, the driving portion drives the transmitting coil to move along the first rail in a third direction, and if the charging efficiency value increases, continue to drive the transmitting coil along the first rail, and move in the third direction until the charging The progressive value of the efficiency value is less than or equal to the second value, or if the charging efficiency value decreases, driving the transmitting coil along the first rail, moving in a fourth direction opposite to the third direction until the charging efficiency The progressive value of the value is less than or equal to the second value.

Optionally, the second value is a minimum step efficiency value when the driving portion drives the transmitting coil to move along the first rail.

Optionally, if the driving portion drives the transmitting coil along the first rail, if the progressive value of the charging efficiency value is less than or equal to the second value, and the charging efficiency value does not reach the maximum charging efficiency value Driving the first rail along the second rail to move in a first direction.

Therefore, in the embodiment of the present application, the alignment of the transmitting coil and the receiving coil can be achieved by comparing the change in the charging efficiency value during the movement of the transmitting coil.

The various parts of the wireless charging device have been described above, but it should be understood that the embodiments of the present application are not limited thereto.

For example, the wireless charging device 200 in the embodiment of the present application may include a voltage conversion circuit for receiving an input voltage and inputting, in addition to the first rail 210, the transmitting coil 220, the driving 230, the processor, and the communication circuit. The voltage is converted to obtain an output voltage and an output current of the voltage conversion circuit. The wireless charging device 200 may further include: a charging interface, configured to be connected to the power supply device; wherein the input voltage received by the voltage conversion circuit is charged by the power supply device The voltage supplied by the interface.

Optionally, the charging interface is a universal serial bus USB interface or a lightning interface.

Optionally, the output current of the power supply device is constant direct current, pulsating direct current or alternating current.

Optionally, the power supply device is an adapter, a mobile power source, or a computer.

It should be understood that the wireless charging device 200 of the embodiment of the present application may not have a charging interface, but has a power supply circuit for receiving an externally input alternating current, and generating an output voltage and an output current output to the voltage conversion circuit according to the externally input alternating current. . At this time, the alternating current is 220V alternating current.

FIG. 12 is a schematic flowchart of a wireless charging method 500 according to an embodiment of the present application. As shown in FIG. 12, the method may be performed by a wireless charging device as shown in FIGS. 5 to 11. The wireless charging device includes a first rail and a transmitting coil, and may further include a driving portion. The method 500 includes: S510, by driving Moving and/or driving the transmitting coil along the first rail to adjust a position of the transmitting coil within a range of motion; S510, transmitting an electromagnetic signal through the transmitting coil to the device to be charged provided with the receiving coil Make wireless charging.

Optionally, as an embodiment, the wireless charging device further includes a second rail fixedly disposed in the wireless charging device, wherein driving the first rail to move includes: driving the first rail along the first Two rail movements.

Optionally, as an embodiment, by driving the first rail to move and/or driving the transmitting coil to move along the first rail, adjusting a position of the transmitting coil within a range of motion comprises: determining the device to be charged The receiving coil is located at a target position within the range of motion of the transmitting coil; the movement of the transmitting coil is adjusted to the target position by driving the first rail to move and/or driving the transmitting coil to move along the first rail.

Optionally, as an embodiment, determining that the receiving coil of the device to be charged is located at a target position within a range of motion of the transmitting coil includes: when the device to be charged is charging, within a range of motion of the transmitting coil Infrared thermal sensing is performed to obtain an infrared thermal sensing result; according to the infrared thermal sensing result, the target position at which the receiving coil is located is determined.

Optionally, as an embodiment, determining the target location where the receiving coil is located according to the infrared heat sensing result, including: determining, according to the preset information and the infrared heat sensing result, the target position where the receiving coil is located, The preset information characterizes a heat generation characteristic of each known portion of the device to be charged at a specific charging phase and/or charging efficiency, and the infrared heat sensing result is a heat of the device to be charged in the specific charging phase and/or charging efficiency. feature.

Optionally, as an embodiment, determining the target location where the receiving coil is located according to the preset information and the infrared heat sensing result, including: determining, according to the preset information and the infrared heat sensing result, that the specific emission feature is a position corresponding to the device to be charged; determining a position of the receiving coil according to the specific transmitting feature at a position corresponding to the device to be charged.

Optionally, as an embodiment, the specific heating feature is: the temperature value is the highest.

Optionally, as an embodiment, determining a target position within a range of motion of the transmitting coil in which the receiving coil of the device to be charged is located includes: performing pressure sensing within a range of motion of the transmitting coil, and detecting a butterfly pressure And determining, according to the pressure sensing result, the target position at which the receiving coil is located.

Optionally, as an embodiment, determining the target location where the receiving coil is located according to the pressure sensing result includes: determining, according to the pressure sensing result, a target area of the to-be-charged device in a range of motion of the transmitting coil; Determining at least one candidate location in the target area according to a location of the receiving coil of the device to be charged relative to the device to be charged; determining, according to charging efficiency of each candidate location in the at least one candidate location, the receiving coil is located target location.

Optionally, as an embodiment, determining, according to the charging efficiency of each candidate location in the at least one candidate location, the target location where the receiving coil is located, including: adjusting the transmitting coil to the at least one candidate location respectively Aligning; determining a charging efficiency of each candidate location; determining a point of highest charging efficiency among the at least one candidate location as the target location at which the receiving coil is located.

Optionally, as an embodiment, adjusting the position of the transmitting coil in the range of motion by driving the first rail to move and/or driving the transmitting coil along the first rail comprises: moving the transmitting coil according to a change in the received power of the device to be charged or a change in the value of the charging efficiency, by driving the first rail to move and/or driving the transmitting coil to move along the first rail, adjusting the position of the transmitting coil within the range of motion .

Optionally, as an embodiment, the method further includes: communicating with the device to be charged to obtain the received power of the receiving coil of the device to be charged.

Optionally, as an embodiment, the method further includes: calculating a charging efficiency value according to the received power and the transmit power of the transmitting coil.

Optionally, as an embodiment, the adjusting the position of the transmitting coil in the range of motion comprises: driving the first rail along the second rail to move in a first direction, and if the charging efficiency value is increased, continuing to drive the Moving the first rail along the second rail in the first direction until the progressive value of the charging efficiency value is less than or equal to the first value, or if the charging efficiency value decreases, driving the first rail along the The second rail moves in a second direction opposite to the first direction until the progressive value of the charging efficiency value is less than or equal to the first value.

Optionally, as an embodiment, the first value is a minimum step efficiency value when the driving portion drives the first rail to move along the second rail.

Optionally, as an embodiment, the adjusting the position of the transmitting coil in the range of motion comprises: driving the transmitting coil along the first rail to move in a third direction, and if the charging efficiency value increases, continuing to drive the transmitting Moving the coil along the first rail in the third direction until the progressive value of the charging efficiency value is less than or equal to the second value, or if the charging efficiency value decreases, driving the transmitting coil along the first rail And moving in a fourth direction opposite to the third direction until the progressive value of the charging efficiency value is less than or equal to the second value.

Optionally, as an embodiment, the second value is a minimum step efficiency value when the driving portion drives the transmitting coil to move along the first rail.

Optionally, as an embodiment, driving the transmitting coil along the first rail and moving in a third direction comprises: driving the first rail to move along the second rail, if the charging efficiency value When the progressive value is less than or equal to the first value, and the charging efficiency value does not reach the maximum charging efficiency value, the driving portion drives the transmitting coil to move along the first rail and move in the third direction.

Optionally, as an embodiment, driving the first rail along the second rail to move in a first direction comprises: driving the transmitting coil along the first rail, if the charging efficiency value is When the progressive value is less than or equal to the second value, and the charging efficiency value does not reach the maximum charging efficiency value, the first rail is driven to move along the second rail in the first direction.

Optionally, as an embodiment, the wireless charging device further includes a first traction line, a second traction line, a first spring, a second spring, a first motor, and a second motor; in the first rail, the first One end of a pulling wire is connected to one end of the first spring, and the other end of the first pulling wire passes through one end of the first rail and is connected to the first motor, and the other end of the first spring is opposite to the first The other end of the rail is fixed; in the second rail, one end of the second traction line is connected to one end of the second spring, and the other end of the second traction line passes through one end of the second rail, and the same a second motor is connected, the other end of the second spring is fixed to the other end of the second rail; the transmitting coil is connected to the first traction line or the first spring through a first connecting portion; the first rail passes the second connection The portion is connected to the second traction line or the second spring.

Optionally, as an embodiment, the first motor and the second motor are the same motor, and the same motor includes a switching portion, configured to: drive the first traction line and drive the second traction line Switch between.

Optionally, as an embodiment, the switching portion includes a first gear, a second gear, and a third gear, the other end of the first traction line is connected to the first gear, and the other end of the second traction line is connected to the second gear. The same motor is provided with a third gear, and the third gear can be meshed with the first gear and the second gear, respectively.

Optionally, as an embodiment, the first connecting portion is disposed at a junction of the first traction line and the first spring; and/or the second connecting portion is disposed at the second traction line and the second The connection of the springs.

Optionally, as an embodiment, the first rail is a circular arc rail or a circular rail, and the second rail is a linear rail, and an end of the second rail that passes through the second traction line is disposed at the first The center of the circle where the rail is located.

Optionally, as an embodiment, the first rail and the second rail are linear rails, and the first rail and the second rail are perpendicular to each other.

It should be understood that the wireless charging method can be implemented by the wireless charging device 200 described above, and for brevity, no further details are provided herein.

It should be understood that, in the various embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application. The implementation process constitutes any limitation.

In addition, the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist at the same time. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection 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 solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

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

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.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims

A wireless charging device, comprising: a first guide rail, a driving portion, and a transmitting coil,

The driving portion is configured to: drive the movement of the first rail, and drive the transmitting coil to move along the first rail;

The transmitting coil is configured to: emit an electromagnetic signal to wirelessly charge a device to be charged provided with a receiving coil.
The wireless charging device of claim 1 wherein said drive portion includes a first pull wire for pulling said transmit coil to move along said first rail.
The wireless charging device according to claim 2, wherein the driving portion further comprises a first spring and a first motor;

In the first rail, one end of the first traction line is connected to one end of the first spring, and the other end of the first traction line passes through one end of the first rail, and the first a motor is connected, the other end of the first spring is fixed to the other end of the first rail;

The transmitting coil is coupled to the first traction wire or the first spring by a first connection.
The wireless charging device according to claim 3, wherein the wireless charging device further comprises a second rail, the second rail being fixedly disposed in the wireless charging device,

The drive portion is also used to:

Driving the first rail to move along the second rail.
The wireless charging device according to claim 4, wherein said driving portion further comprises a second pulling wire for pulling said first rail to move along said second rail.
The wireless charging device according to claim 5, wherein the driving portion further comprises a second spring and a second motor,

In the second rail, one end of the second traction line is connected to one end of the second spring, and the other end of the second traction line passes through one end of the second rail, and the first a second motor is connected, the other end of the second spring is fixed to the other end of the second rail;

The first rail is coupled to the second traction wire or the second spring by a second connection.
The wireless charging device according to claim 6, wherein the first motor and the second motor are the same motor, and the same motor includes a switching portion, the switching portion is configured to:

Switching between driving the first traction line and driving the second traction line.
The wireless charging device according to claim 7, wherein the switching portion includes a first gear, a second gear, and a third gear, and the other end of the first traction line is connected to the first gear, the second The other end of the pull wire is connected to the second gear, and the same motor is provided with a third gear, and the third gear can be meshed with the first gear and the second gear, respectively.
The wireless charging device according to any one of claims 6 to 8, wherein the first connecting portion is provided at a junction of the first pull line and the first spring; and/or

The second connecting portion is disposed at a junction of the second pulling line and the second spring.
The wireless charging device according to claim 9, wherein the first connecting portion is provided at the other end of the first rail.
The wireless charging device according to any one of claims 6 to 10, wherein the first connecting portion is a slider movable along the first rail; the second connecting portion is slidable A slider that moves the second rail.
The wireless charging device according to any one of claims 4 to 11, wherein the first guide rail is a circular arc guide rail or a circular guide rail, and the second guide rail is a linear guide rail.
The wireless charging device according to claim 12, wherein one end of the second guide rail that passes through the second pull line is disposed at a center of a circle where the first guide rail is located.
The wireless charging device according to any one of claims 4 to 11, wherein the first rail and the second rail are linear guide rails.
The wireless charging device of claim 14, wherein the first rail and the second rail are perpendicular to each other.
The wireless charging device according to any one of claims 1 to 15, wherein the wireless charging device further comprises:

a processor, configured to determine that the receiving coil of the device to be charged is located at a target position within a range of motion of the transmitting coil;

The driving component is further configured to: drive the transmitting coil to move to the target position;

The transmitting coil is further configured to: wirelessly charge the device to be charged at the target location.
The wireless charging device of claim 16, wherein the wireless charging device further comprises:

The infrared heat sensing portion is configured to perform infrared heat sensing within a range of motion of the transmitting coil when the device to be charged is charged, and output an infrared heat sensing result to the processor;

The processor is specifically configured to: determine, according to the infrared heat sensing result, the target location where the receiving coil is located.
The wireless charging device according to claim 17, wherein the processor is specifically configured to:

Determining, according to the preset information and the infrared heat sensing result, the target location where the receiving coil is located, the preset information characterizing each known part of the device to be charged under a specific charging phase and/or charging efficiency The heat generation characteristic is the heat generation characteristic of the device to be charged under the specific charging phase and/or charging efficiency.
The wireless charging device according to claim 18, wherein the processing is specifically for:

Determining, according to the preset information and the infrared heat sensing result, a specific transmitting feature at a location corresponding to the device to be charged;

Determining a position of the receiving coil according to the specific transmitting feature at a position corresponding to the device to be charged.
The wireless charging device according to claim 19, wherein said specific heat generation characteristic is: the temperature value is the highest.
The wireless charging device of claim 17, wherein the wireless charging device further comprises:

a pressure sensing portion, configured to perform pressure sensing within a range of motion of the transmitting coil, and output a pressure sensing result to the processor;

The processor is further configured to: determine, according to the pressure sensing result, the target position where the receiving coil is located.
The wireless charging device according to claim 21, wherein the processor is specifically configured to:

Determining, according to the pressure sensing result, a target area of the device to be charged in a range of motion of the transmitting coil;

Determining at least one candidate location within the target area according to a location of the receiving coil of the device to be charged relative to the device to be charged;

Determining the target location at which the receiving coil is located based on charging efficiency of each of the at least one candidate location.
The wireless charging device according to claim 22, wherein the processor determines the target location at which the receiving coil is located according to a charging efficiency of each candidate position in the at least one candidate location, including:

Adjusting the transmit coils to be aligned with the at least one candidate position, respectively;

Determining a charging efficiency of each of the candidate locations;

A point at which the charging efficiency is the highest among the at least one candidate position is determined as the target position at which the receiving coil is located.
The wireless charging device according to any one of claims 20 to 23, wherein the pressure sensing portion is a resistive pressure sensor.
The wireless charging device according to any one of claims 4 to 15, wherein the driving portion is specifically configured to:

The position of the transmitting coil in the wireless charging device is adjusted according to a change in received power of the device to be charged or a change in charging efficiency value during movement of the transmitting coil.
The wireless charging device of claim 25, wherein the wireless charging device further comprises:

a communication portion, configured to communicate with the device to be charged to obtain the received power of the receiving coil of the device to be charged.
The wireless charging device of claim 26, wherein the wireless charging device further comprises:

And a processor, configured to calculate a charging efficiency value according to the received power and a transmit power of the transmitting coil.
The wireless charging device according to any one of claims 25 to 27, wherein the driving portion is specifically configured to:

Driving the first rail along the second rail to move in a first direction,

If the charging efficiency value increases, continuing to drive the first rail along the second rail, moving in the first direction until the progressive value of the charging efficiency value is less than or equal to the first value, or

If the charging efficiency value decreases, driving the first rail along the second rail, moving in a second direction opposite to the first direction until the progressive value of the charging efficiency value is less than or equal to the The first value.
The wireless charging device according to claim 28, wherein said first value is a minimum step efficiency value when said driving portion drives said first rail to move along said second rail.
The wireless charging device according to claim 28 or 29, wherein the driving portion is specifically configured to:

Driving the transmitting coil along the first rail to move in a third direction,

If the charging efficiency value increases, continue to drive the transmitting coil along the first rail, and move in the third direction until the progressive value of the charging efficiency value is less than or equal to the second value, or

If the charging efficiency value decreases, driving the transmitting coil along the first rail, moving in a fourth direction opposite to the third direction until the progressive value of the charging efficiency value is less than or equal to the first Two values.
The wireless charging device according to claim 30, wherein said second value is a minimum step efficiency value when said driving portion drives said transmitting coil to move along said first rail.
The wireless charging device according to claim 30 or claim 31, wherein the driving portion drives the transmitting coil to move along the first rail in a third direction, comprising:

Where the driving portion drives the first rail to move along the second rail, if the progressive value of the charging efficiency value is less than or equal to the first value, and the charging efficiency value does not reach a maximum The charging portion drives the transmitting coil to move along the first rail and to move in a third direction.
The wireless charging device according to claim 30 or claim 31, wherein the driving portion drives the first rail along the second rail to move in a first direction, comprising:

Where the driving portion drives the transmitting coil along the first rail, if the progressive value of the charging efficiency value is less than or equal to the second value, and the charging efficiency value does not reach the maximum charging efficiency In the value, the first rail is driven to move in the first direction along the second rail.
A wireless charging system, comprising the wireless charging device according to any one of claims 1 to 33, and a device to be charged that is charged by the wireless charging device.
A method of wireless charging, the method being performed by a wireless charging device, the wireless charging device comprising: a first guide rail and a transmitting coil, the method comprising:

Adjusting a position of the transmitting coil within a range of motion by driving the first rail to move and/or driving the transmitting coil to move along the first rail;

An electromagnetic signal is transmitted through the transmitting coil to wirelessly charge a device to be charged provided with a receiving coil.
The method according to claim 35, wherein said wireless charging device further comprises a second rail, said second rail being fixedly disposed within said wireless charging device,

The driving the first rail movement comprises:

Driving the first rail to move along the second rail.
The method according to claim 35 or 36, wherein said adjusting said transmitting coil is within a range of motion by driving said first rail to move and/or driving said transmitting coil to move along said first rail The location includes:

Determining that the receiving coil of the device to be charged is located at a target position within a range of motion of the transmitting coil;

The movement of the transmitting coil is adjusted to the target position by driving the first rail to move and/or driving the transmitting coil to move along the first rail.
The method according to claim 37, wherein the determining that the receiving coil of the device to be charged is located at a target position within a range of motion of the transmitting coil comprises:

When the device to be charged is being charged, infrared heat sensing is performed within a range of motion of the transmitting coil to obtain an infrared heat sensing result;

Determining, according to the infrared heat sensing result, the target position at which the receiving coil is located.
The method according to claim 38, wherein the determining the target location at which the receiving coil is located according to the infrared heat sensing result comprises:

Determining, according to the preset information and the infrared heat sensing result, the target location where the receiving coil is located, the preset information characterizing each known part of the device to be charged under a specific charging phase and/or charging efficiency The heat generation characteristic is the heat generation characteristic of the device to be charged under the specific charging phase and/or charging efficiency.
The method according to claim 39, wherein the determining the target location at which the receiving coil is located according to the preset information and the infrared heat sensing result comprises:

Determining, according to the preset information and the infrared heat sensing result, a specific transmitting feature at a location corresponding to the device to be charged;

Determining a position of the receiving coil according to the specific transmitting feature at a position corresponding to the device to be charged.
The method of claim 40 wherein said specific heating characteristic is: the highest temperature value.
The method according to claim 37, wherein the determining a target location within a range of motion of the transmitting coil in which the receiving coil of the device to be charged is located comprises:

Pressure sensing is performed within the range of motion of the transmitting coil, and butterfly pressure sensing results;

Determining, according to the pressure sensing result, the target position at which the receiving coil is located.
The method according to claim 42, wherein the determining the target location at which the receiving coil is located according to the pressure sensing result comprises:

Determining, according to the pressure sensing result, a target area of the device to be charged in a range of motion of the transmitting coil;

Determining at least one candidate location within the target area according to a location of the receiving coil of the device to be charged relative to the device to be charged;

Determining the target location at which the receiving coil is located based on charging efficiency of each of the at least one candidate location.
The method according to claim 43, wherein determining the target location at which the receiving coil is located according to a charging efficiency of each of the at least one candidate location comprises:

Adjusting the transmit coils to be aligned with the at least one candidate position, respectively;

Determining a charging efficiency of each of the candidate locations;

A point at which the charging efficiency is the highest among the at least one candidate position is determined as the target position at which the receiving coil is located.
The method according to claim 36, wherein said adjusting said position of said transmitting coil within a range of motion by driving said first rail to move and/or to drive said transmitting coil to move along said first rail ,include:

Relocating the first guide rail and/or driving the transmit coil along the first guide rail according to a change in a received power of the device to be charged or a change in a charging efficiency value during movement of the transmitting coil Adjusting the position of the transmitting coil within the range of motion.
The method of claim 45, wherein the method further comprises:

Communicating with the device to be charged to obtain the received power of the receiving coil of the device to be charged.
The method of claim 46, wherein the method further comprises:

A charging efficiency value is calculated based on the received power and the transmission power of the transmitting coil.
The method according to any one of claims 45 to 47, wherein the adjusting the position of the transmitting coil within a range of motion comprises:

Driving the first rail along the second rail to move in a first direction,

If the charging efficiency value increases, continuing to drive the first rail along the second rail, moving in the first direction until the progressive value of the charging efficiency value is less than or equal to the first value, or

If the charging efficiency value decreases, driving the first rail along the second rail, moving in a second direction opposite to the first direction until the progressive value of the charging efficiency value is less than or equal to the The first value.
The method of claim 48 wherein said first value is a minimum step efficiency value when said drive portion drives said first rail to move along said second rail.
The method according to claim 48 or 49, wherein said adjusting the position of said transmitting coil within a range of motion comprises:

Driving the transmitting coil along the first rail to move in a third direction,

If the charging efficiency value increases, continue to drive the transmitting coil along the first rail, and move in the third direction until the progressive value of the charging efficiency value is less than or equal to the second value, or

If the charging efficiency value decreases, driving the transmitting coil along the first rail, moving in a fourth direction opposite to the third direction until the progressive value of the charging efficiency value is less than or equal to the first Two values.
The method of claim 50 wherein said second value is a minimum step efficiency value when said drive portion drives said transmit coil to move along said first rail.
The method according to claim 50 or claim 51, wherein the driving the transmitting coil along the first rail and moving in a third direction comprises:

In the case of driving the first rail to move along the second rail, if the progressive value of the charging efficiency value is less than or equal to the first value, and the charging efficiency value does not reach the maximum charging efficiency value The driving portion drives the transmitting coil to move along the first rail and move in a third direction.
The method according to claim 50 or 51, wherein the driving the first rail along the second rail to move in a first direction comprises:

Driving the transmitting coil along the first rail, if the progressive value of the charging efficiency value is less than or equal to the second value, and the charging efficiency value does not reach the maximum charging efficiency value, driving The first rail moves along the second rail in a first direction.
The method of claim 36, wherein the wireless charging device further comprises a first pull line, a second pull line, a first spring, a second spring, a first motor, and a second motor;

In the first rail, one end of the first traction line is connected to one end of the first spring, and the other end of the first traction line passes through one end of the first rail, and the first a motor is connected, the other end of the first spring is fixed to the other end of the first rail;

In the second rail, one end of the second traction line is connected to one end of the second spring, and the other end of the second traction line passes through one end of the second rail, and the first a second motor is connected, the other end of the second spring is fixed to the other end of the second rail;

The transmitting coil is connected to the first traction line or the first spring through a first connecting portion;

The first rail is coupled to the second traction wire or the second spring by a second connection.
The method according to claim 54, wherein the first motor and the second motor are the same motor, and the same motor includes a switching portion, the switching portion is configured to:

Switching between driving the first traction line and driving the second traction line.
The method according to claim 55, wherein said switching portion comprises a first gear, a second gear and a third gear, and the other end of said first traction line is connected to said first gear, said second traction line The other end is connected to the second gear, and the same motor is provided with a third gear, and the third gear can be meshed with the first gear and the second gear, respectively.
The method according to any one of claims 54 to 56, wherein the first connecting portion is disposed at a junction of the first pull line and the first spring; and/or

The second connecting portion is disposed at a junction of the second pulling line and the second spring.
The method according to any one of claims 36 to 57, wherein the first guide rail is a circular arc guide rail or a circular guide rail, and the second guide rail is a linear guide rail.

One end of the second rail passing through the second pulling line is disposed at a center of a circle where the first rail is located.
The method according to any one of claims 36 to 57, wherein the first rail and the second rail are linear guides, and the first rail and the second rail are perpendicular to each other.