CN111884360A

CN111884360A - Wireless charging seat and charging method using same

Info

Publication number: CN111884360A
Application number: CN202010668886.2A
Authority: CN
Inventors: 谢红斌
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2020-11-03
Also published as: WO2022012150A1

Abstract

The wireless charging seat is used for charging equipment to be charged, a receiving coil and a first UWB (ultra wide band) tag are arranged in the equipment to be charged, the wireless charging seat comprises a seat body, a transmitting coil and a driving mechanism, a second UWB tag in signal connection with the first UWB tag is arranged in the seat body, the wireless charging seat is in signal connection with the first UWB tag through the second UWB tag so as to position the receiving coil of the equipment to be charged, and the transmitting coil is movably arranged in the seat body and used for charging the equipment to be charged when being aligned with the receiving coil; the driving mechanism adjusts the position of the transmitting coil in the seat body according to the position of the receiving coil, so that the transmitting coil is aligned with the receiving coil in the equipment to be charged, the problem that the electromagnetic energy transmission efficiency is reduced due to the reduction of the coupling degree of the transmitting coil and the receiving coil is solved, and the electromagnetic energy transmission efficiency is effectively improved.

Description

Wireless charging seat and charging method using same

Technical Field

The present disclosure relates to wireless charging technologies, and more particularly, to a wireless charging cradle and a charging method using the same.

Background

The wireless charging technology is derived from the wireless power transmission technology, and the charger and the device to be charged are connected without wires because energy is transmitted between the charger and the device to be charged in a magnetic field. The principle of realizing wireless charging is roughly as follows:

the wireless charging seat is provided with a transmitting coil, and the device to be charged is provided with a receiving coil. When the device to be charged is charged wirelessly, the transmitting coil of the wireless charging seat is opposite to the receiving coil of the device to be charged, so that smooth charging is ensured.

However, when a user places a device to be charged on a wireless charging stand, the placement position of a receiving coil of the device to be charged and a transmitting coil of the wireless charging stand are often deviated. After the situation happens, the efficiency of electromagnetic energy transmission is reduced due to the reduction of the coupling degree of the transmitting coil and the receiving coil, the transmitting coil needs to provide more energy to maintain the charging power of the receiving coil, so that the wireless charging seat can generate heat, and the stable work and the charging speed of the system are influenced. Moreover, when the placement position of the device to be charged deviates from the charging area of the transmitting coil by a large distance, the wireless charging stand fails to charge or fails to trigger, so that the wireless charging stand cannot charge.

Disclosure of Invention

The embodiment of the application provides a wireless charging seat capable of being accurately aligned to improve electromagnetic transmission efficiency and a method for charging by using the wireless charging seat.

On the one hand, this application provides a wireless charging seat for charge for treating the battery charging outfit, it has receiving coil and a UWB label to treat that the battery charging outfit embeds, wireless charging seat includes:

the base is provided with a bearing surface for placing the equipment to be charged, a plurality of second UWB tags are arranged in the base, and when the equipment to be charged is placed on the bearing surface, the second UWB tags are in signal connection with the first UWB tags so as to position the position of the receiving coil and generate positioning information;

the transmitting coil is movably arranged in the seat body, and when the transmitting coil is aligned with the receiving coil, the equipment to be charged can be charged through the matching of the transmitting coil and the receiving coil;

and the driving mechanism is used for driving the transmitting coil to move and align with the receiving coil according to the positioning information.

In one embodiment, at least 4 second UWB tags are disposed in the housing.

In one embodiment, at least one of the second UWB tags disposed in the seat body is located in a different mounting plane from other second UWB tags, the mounting plane is parallel to the bearing surface, and the receiving coil is located on a side of the mounting plane opposite to the bearing surface.

In one embodiment, a control circuit board is disposed in the seat body, the control circuit board is provided with a power circuit electrically connected to an external power source, the transmitting coil and the second UWB tag are both electrically connected to the power circuit, and when the control circuit board is powered on by the external power source, the external power source supplies power to the second UWB tag through the power circuit.

In one embodiment, the control circuit board is provided with a control module, and when the driving mechanism drives the transmitting coil to move to be aligned with the receiving coil, the control module controls a power circuit to supply power to the transmitting coil so as to charge the device to be charged on the bearing surface.

In one embodiment, the driving mechanism includes a first moving assembly and a movable plate, the first moving assembly is used for driving the movable plate to move in a translational manner along a first direction, a plane of the movable plate in the translational manner is approximately parallel to the bearing surface, and the transmitting coil is disposed on the movable plate;

and/or the driving mechanism comprises a movable plate and a second moving assembly, the second moving assembly is used for driving the movable plate to move in a translational mode along a second direction, the plane where the movable plate moves in the translational mode is approximately parallel to the bearing surface, and the transmitting coil is arranged on the movable plate.

In one embodiment, when the driving mechanism includes a first moving assembly and a second moving assembly, the first moving assembly is identical in structure to the second moving assembly.

In one embodiment, the movable plate is mounted on the second moving assembly to move in a translational manner along a second direction under the driving of the second moving assembly, the second moving assembly is connected with the first moving assembly, and the first moving assembly can drive the second moving assembly to move in a translational manner along the first direction.

In one embodiment, the second motion assembly includes a transmission rack, an engaging wheel and a driving motor, the transmission rack is connected to the movable plate, the engaging wheel is engaged with the transmission rack, and the engaging wheel can be driven by the driving motor to engage and drive the transmission rack to move back and forth, so that the transmission rack drives the movable plate to move in the seat.

In one embodiment, a reduction gear set is arranged between the output shaft of the driving motor and the meshing wheel, and when the output shaft of the driving motor rotates, the reduction gear set changes the transmission ratio of the output shaft transmitted to the meshing wheel.

In another aspect, the present application provides a method for charging by using the wireless charging cradle, including:

when the situation that the equipment to be charged is placed on the bearing surface of the base of the wireless charging base is detected, the wireless charging base is in signal connection with the first UWB tag through the second UWB tag so as to position the position of the receiving coil and generate positioning information;

according to the positioning information, the wireless charging seat drives the transmitting coil to move through the driving mechanism so as to align the transmitting coil with the receiving coil;

through the cooperation of transmitting coil with receiving coil, the wireless charging seat charges treating charging device.

The utility model provides a wireless charging seat and utilize wireless charging seat to charge method, this wireless charging seat includes the pedestal, transmitting coil, actuating mechanism, be equipped with the UWB label in the pedestal, this wireless charging seat treats battery charging outfit when charging, UWB label in the pedestal and treat the battery charging outfit in UWB label signal connection, fix a position with the receiving coil who treats battery charging outfit, actuating mechanism adjusts the position of transmitting coil in the pedestal according to receiving coil's position, make transmitting coil aim at with the receiving coil who treats in the battery charging outfit, the coupling degree of having avoided transmitting coil and receiving coil descends and the problem that leads to electromagnetic energy transmission's efficiency to descend, effectively improve electromagnetic energy transmission efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a wireless charging cradle according to an embodiment;

fig. 2 is a schematic structural diagram of a device to be charged, which is suitable for the wireless charging cradle shown in fig. 1 to perform wireless charging;

fig. 3 is another schematic structural diagram of a device to be charged, which is suitable for the wireless charging cradle shown in fig. 1 to perform wireless charging;

FIG. 4 is a schematic structural diagram of a driving mechanism of a wireless charging cradle according to an embodiment;

fig. 5 is a schematic perspective view illustrating a driving mechanism of a wireless charging cradle according to an embodiment;

fig. 6 is a schematic perspective view of the driving mechanism of the wireless charging stand shown in fig. 5, with the movable plate removed;

fig. 7 is a schematic view of a connection structure of the security plate and the transmission rack in the wireless charger according to an embodiment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and fig. 2, the present application provides a wireless charging cradle 100 for charging a device 200 to be charged, where the device 200 to be charged may be a mobile phone or a tablet computer, or may be a bracelet with a wireless charging function. The type of the device to be charged 200 is not limited herein as long as the device to be charged 200 has a wireless charging function, that is, the device to be charged 200 has at least a receiving coil 201 built therein.

As shown in fig. 1 and 4, the wireless charging cradle 100 includes a base 110, a transmitting coil 120 and a driving mechanism 130. The base 110 has a carrying surface 111 for placing the device 200 to be charged, and when the wireless charging stand 100 is required to charge the device 200 to be charged, the device 200 to be charged is placed on the carrying surface 111.

In this embodiment, the device 200 to be charged is provided with a first UWB (Ultra wide band) tag 202, a plurality of second UWB tags 101 are arranged in the seat body 110, and when the device 200 to be charged is placed on the bearing surface 111, the plurality of second UWB tags 101 are in signal connection with the first UWB tag 202 to locate the position of the receiving coil 201 and generate locating information.

For ease of understanding, the positioning information obtained by positioning the receiving coil 201 is described below by way of example. Since the relative position (hereinafter referred to as "first relative position") between the receiving coil 201 and the first UWB tag 202 is constant after the two are mounted to the device to be charged 200, accordingly, the relative position (hereinafter referred to as "second relative position") between the position where the plurality of second UWB tags 101 are disposed within the housing and the transmitting coil 120 is also determined. After the plurality of second UWB tags 101 and the first UWB tag 202 are signal-coupled, a relative position relationship between each other in space can be obtained, and then according to the relative relationship between the plurality of second UWB tags 101 and the first UWB tag 202, and the first relative position and the second relative position, the relative position between the transmitting coil 120 and the receiving coil 201 can be obtained, that is, the receiving coil 201 is positioned, and the relative position relationship is stored in an information form to obtain positioning information corresponding to the information form.

The driving mechanism 130 is used for driving the transmitting coil 120 to move and align with the receiving coil 201 according to the positioning information, so that the problem that the coupling degree of the transmitting coil 120 and the receiving coil 201 is reduced to cause the reduction of the efficiency of electromagnetic energy transmission is avoided. Reference herein to "the transmit coil 120 being aligned with the receive coil 201" includes perfect alignment as well as alignment within a certain error margin. For example, when the transmitting coil 120 and the receiving coil 201 are completely aligned, the center of the transmitting coil 120 coincides with the orthographic projection of the center of the receiving coil 201 on the bearing surface 111. In order to ensure good electromagnetic transmission efficiency, the allowable error of "aligning the transmitting coil 120 with the receiving coil 201" may be less than 1.5cm, and at this time, the center of the transmitting coil 120 and the orthographic projection of the center of the receiving coil 201 on the bearing surface 111 are not coincident, and the offset distance is less than 1.5 cm. The offset distance is a straight-line distance between a point of the orthographic projection of the center of the transmitting coil 120 on the bearing surface 111 and a point of the orthographic projection of the center of the receiving coil 201 on the bearing surface 111.

It should be noted that, the first UWB tag 202 and the second UWB tag 101 both adopt an ultra-wideband technology, and implement wireless transmission by transmitting and receiving extremely narrow pulses having a nanosecond or microsecond order or less, unlike the conventional communication technology. Because the pulse time width is extremely short, the ultra-wideband on the frequency spectrum can be realized, the precision is high, the power consumption is low, and the power consumption can not be increased under the condition of ensuring high-precision positioning.

The utility model provides a wireless charging seat 100, only need to place the equipment 200 of waiting to charge in loading face 111, second UWB label 101 in the pedestal 110 and the first UWB label 202 of waiting to charge in the equipment 200 carry out signal coupling, fix a position receiving coil 201's position, actuating mechanism 130 alright with the position according to the receiving coil 201 that the location obtained, adjust transmitting coil 120's position, finally make transmitting coil 120 and receiving coil 201 aim at, and then the electromagnetic energy that transmitting coil 120 sent can transmit to receiving coil 201 high-efficiently, with improvement electromagnetic energy transmission efficiency.

The number and the position of the first UWB tags 202 in the device to be charged 200 are not limited, as long as when the device to be charged 200 is placed on the bearing surface 111, the first UWB tag 202 and the second UWB tag 101 are in communication connection, and the position of the receiving coil 201 in the device to be charged 200 is located. For example, as shown in connection with fig. 2, the first UWB tag 202 of the device to be charged 200 is disposed within an area enclosed by an edge contour of the receiving coil 201. For another example, as shown in connection with fig. 3, the first UWB tag 202 is disposed outside the region enclosed by the edge contour of the receiving coil 201. In other embodiments, the first UWB tag 202 may be disposed on an edge contour of the receiving coil 201.

In some embodiments, the transmitting coil 120 is integrated into a mounting plate (not shown), and the transmitting coil 120 is movably disposed in the housing 110 by slidably disposing the mounting plate in the housing 110.

In other embodiments, the transmit coil 120 may also be directly integrated into the mechanism that drives the transmit coil 120 to move.

For example, as shown in conjunction with fig. 4 and 5, the driving mechanism 130 includes a first moving assembly 131, a second moving assembly 132, and a movable plate 133. The transmitting coil 120 is disposed on the movable plate 133, and the first moving assembly 131 and the second moving assembly 132 are respectively configured to drive the movable plate 133 to perform a translational motion along a first direction (see X direction in fig. 4 and 5) and a second direction (see Y direction in fig. 4 and 5), where the first direction and the second direction are substantially perpendicular, so that the movable plate 133 can drive the transmitting coil 120 to move in an X-Y two-dimensional plane, so that the transmitting coil 120 can be precisely aligned with the receiving coil 201.

The plane of the movable plate 133 in the translational motion is substantially parallel to the supporting surface 111, that is, the first direction and the second direction are both substantially parallel to the supporting surface 111, so that when the transmitting coil 120 moves along with the movable plate 133, the distance from the transmitting coil 120 to the supporting surface 111 is substantially kept unchanged, the energy of the magnetic field emitted by the transmitting coil 120 on the supporting surface 111 is stabilized within a proper range, and the influence of the excessive energy change of the magnetic field on the charging stability when the transmitting coil 120 moves to different positions is avoided.

It should be noted that, in some embodiments, the driving mechanism 130 may also include only one of the first moving assembly 131 and the second moving assembly 132, so as to drive the moving plate 133 to move in a translational manner in the first direction or the second direction, so as to align the transmitting coil 120 and the receiving coil 201 in the first direction or the second direction. For example, in some embodiments, when the device to be charged 200 is placed on the bearing surface 111 of the seat body 110, a situation of placement position deviation is relatively easily generated in the first direction, that is, the receiving coil 201 in the device to be charged 200 is deviated from the transmitting coil 120 in the first direction, at this time, only the first moving component 131 needs to drive the transmitting coil 120 to move along the first direction, so that the transmitting coil 120 is aligned with the receiving coil 201, and therefore, in this embodiment, the second driving component 132 may be omitted. Accordingly, in other embodiments, when the device to be charged 200 is placed on the carrying surface 111 of the seat body 110, the placement position is easily shifted in the second direction, and the first moving component 131 can be omitted.

The bearing surface 111 of the base 110 is provided with a positioning structure, which is capable of positioning the device 200 to be charged along a first direction, specifically, the positioning structure is configured such that when the device 200 to be charged is placed on the bearing surface 111, the receiving coil 201 is aligned with the transmitting coil 120 in the first direction. At this time, the continuity of the center of the receiving coil 201 and the center of the transmitting coil 120 is substantially perpendicular to the first direction. In this embodiment, since the positioning structure enables the receiving coil 201 in the device to be charged 200 and the transmitting coil 120 in the base 110 to be aligned in the first direction without offset, the transmitting coil 120 and the receiving coil 201 can be aligned in both the first direction and the second direction only by driving the transmitting coil 120 to move relative to the receiving coil 201 in the second direction by the second driving component 132, so that the transmitting coil 120 and the receiving coil 201 are aligned. Thus, it can be understood that the positioning structure is provided to position the device to be charged 200 in the first direction, and the first moving component 131 is not required to drive the transmitting coil 120 to move in the first direction, so that the first moving component 131 can be omitted in this embodiment. Accordingly, in other embodiments, when the positioning structure is capable of positioning the device to be charged 200 along the second direction, the second moving component 132 is not required to move the transmitting coil 120 in the second direction, and thus the second moving component 132 may be omitted.

It should be noted that in the embodiment that the positioning structure is disposed on the carrying surface 111 to position the device to be charged 200 in the first direction or the second direction, the structure of the driving mechanism 130 to dispose the first moving assembly 131 and the second moving assembly 132 to move the transmitting coil 120 in the first direction and the second direction may still be remained. Specifically, the positioning structure and the corresponding first motion assembly 131 or second motion assembly 132 in the driving mechanism 130 are not mutually exclusive for the purpose of achieving the alignment of the transmitting coil 120 and the receiving coil 201.

For ease of understanding, the following description will be given only by taking the positioning structure as an example for positioning the device to be charged 200 in the first direction.

The positioning structure is used for positioning the device to be charged 200 in a first direction, that is, when the device to be charged 200 is placed on the carrying surface 111, under the positioning effect of the positioning structure, the receiving coil 201 and the transmitting coil 120 are substantially aligned in the first direction, that is, the positioning structure has an effect of preliminary positioning. At this time, the transmitting coil 120 is driven by the first moving assembly 131 to move the receiving coil 201 in the device 200 to be charged, so as to achieve further accurate positioning. Through this kind of structural setting, because the location structure has already treated charging device 200 and has carried out preliminary location, consequently, first motion subassembly 131 only need according to locating information to transmitting coil 120 the position finely tune can to need not to move the adjustment by a wide margin in the first direction transmitting coil 120, effectively improve the regulation alignment efficiency to transmitting coil 120.

In some embodiments, at least 4 second UWB tags 101 are disposed in the housing 110, so that the second UWB tags 101 located at different orientations can be respectively coupled with the first UWB tag 202 of the device to be charged 200 to ensure the positioning accuracy.

At least one second UWB tag 101 and other second UWB tags 101 in the second UWB tags 101 arranged in the base 110 are located in different installation planes. For example, fig. 1 schematically shows that 4 second UWB tags 101 are arranged in the base 110, three of the second UWB tags are located on the same installation plane 101a, and another one of the second UWB tags is not located in the installation plane 101a, so that after the plurality of second UWB tags 101 are respectively positioned in communication with the first UWB tag 202, relative coordinate information in a three-dimensional space can be obtained, so as to improve the positioning accuracy of the receiving coil 201.

The installation plane 101a is parallel to the bearing surface 111, and the receiving coil 201 is located on a side of the installation plane 101a facing away from the bearing surface 111, that is, in a direction perpendicular to the bearing surface 111, the receiving coil 201 is located below the second UWB tag 101, so as to prevent the receiving coil 201 from shielding the second UWB tag 101, which is easy to generate signal interference when the first UWB tag 202 and the second UWB tag 101 communicate with each other, and affects the positioning accuracy.

Be equipped with control circuit board in the pedestal 110, control circuit board is equipped with the power supply circuit with external power source electric connection, transmitting coil 120 all connects in power supply circuit with second UWB label 101 electric property, when control circuit board switch-on external power source, external power source can supply power to second UWB label 101 through power supply circuit, in order to ensure that second UWB label 101 can carry out the transmission and the receipt of signal, in order to communicate with first UWB label 202.

The control circuit board is provided with a control module, and when the driving mechanism 130 drives the transmitting coil 120 to move to be aligned with the receiving coil 201, the control module controls the power circuit to supply power to the transmitting coil 120 so as to charge the device 200 to be charged on the bearing surface 111.

It should be noted that there are many possibilities for the structure of the driving mechanism 130, for example, a screw-driven or telescopic cylinder-driven structure, as long as it is possible to move the transmitting coil 120 into alignment with the receiving coil 201 within the housing 110.

In the embodiment where the driving mechanism 130 includes the first moving component 131 and the second moving component 132, the first moving component 131 and the second moving component 132 have the same structure, so that the types of components can be reduced, the standardization of the components is facilitated, the production and assembly efficiency is improved, and the manufacturing cost is reduced.

As shown in fig. 5 and 6, the movable plate 133 is mounted to the second moving assembly 132 to move in a translational manner along the second direction under the driving of the second moving assembly 132.

The second moving component 132 is connected to the first moving component 131, and the first moving component 131 can drive the second moving component 132 to move in a translational manner along a first direction. For example, the first moving assembly 131 includes a moving plate 1311, when the first moving assembly 131 operates, the moving plate 1311 can move in a translational manner along a first direction, so that when the second moving assembly 132 is disposed on the moving plate 1311, the moving plate 1311 can drive the second moving assembly 132 to move in the translational manner along the first direction, and since the moving plate 133 is mounted on the second moving assembly 132, when the second moving assembly 132 moves in the translational manner along the first direction under the driving of the moving plate 1311, the moving plate 133 will move in the translational manner along the first direction together with the second moving assembly 132.

As shown in fig. 6 and 7, a sliding block 1331 is convexly disposed on one side of the movable plate 133 facing the moving plate 1311, a sliding slot 1332 is disposed on the sliding block 1331, a sliding rail 1312 is disposed on the moving plate 1311, and the sliding rail 1312 is engaged with the sliding slot 1332, so that the movable plate 133 can slide relative to the moving plate 1311. It should be noted that the slide rail 1312 extends along the second direction, so that the movable plate 133 is driven by the second moving assembly 132, and the movable plate 133 moves in a translational manner along the second direction along the slide rail 1312 relative to the movable plate 1311, so that the transmitting coil 120 disposed on the movable plate 133 can move in the second direction, thereby adjusting the relative position of the transmitting coil 120 and the device 200 to be charged on the carrying surface 111. Accordingly, the transmitting coil 120 moves in a first direction relative to the receiving coil 201 under the actuation of the first moving assembly 131. It can be seen that, with this structure, the transmitting coil 120 can move relative to the receiving coil 201 in both the first direction and the second direction, and finally, the alignment of the two is achieved, so as to improve the electromagnetic energy transmission efficiency.

The slide block 1331 may be integrally formed with the movable plate 133, or may be separately disposed and connected together by a connection structure such as a buckle or a screw.

With continued reference to fig. 6 and 7, the second motion assembly 132 includes a drive rack 1321, an engagement wheel 1322, and a drive motor 1323.

The driving rack 1321 is connected to the movable plate 133, and the driving rack 1321 may be integrally formed with the movable plate 133 or may be separately disposed and connected together by a connection structure such as a buckle or a screw

The engaging wheel 1322 is engaged with the transmission rack 1321, and the engaging wheel 1322 can drive the transmission rack 1321 to reciprocate under the driving of the driving motor 1323, so that the transmission rack 1321 drives the movable plate 133 to move in the seat 110.

A reduction gear set 1324 is arranged between the output shaft of the driving motor 1323 and the meshing wheel 1322, when the output shaft of the driving motor 1323 rotates, the reduction gear set 1324 changes the transmission ratio of the output shaft transmitted to the meshing wheel 1322, the meshing wheel 1322 is ensured to have enough meshing force to stably mesh the transmission rack 1321 for reciprocating movement, then the transmission gear drives the movable plate 133 to move, finally the transmitting coil 120 is aligned with the receiving coil 201, and the electromagnetic energy transmission efficiency is improved.

Another embodiment of the present application provides a method for charging by using the wireless charging cradle 100, which includes:

when detecting that the device to be charged 200 is placed on the bearing surface 111 of the base 110 of the wireless charging stand 100, the wireless charging stand 100 is connected to the first UWB tag 202 through the second UWB tag 101, so as to locate the position of the receiving coil 201 and generate location information.

It is understood that the first UWB tag 202 is disposed inside the device to be charged 200, so that when the device to be charged 200 is located at the charging position relative to the cradle 110, for example, when the device to be charged 200 is placed on the carrying surface 111 of the cradle 110, the position of the receiving coil 201 can be known by the wireless charging cradle 100 through signal coupling between the second UWB tag 101 and the first UWB tag 202.

There are many possible ways to detect whether the device to be charged 200 is placed on the carrying surface 111 of the base 110. For example, in some embodiments, a sensor is disposed on the carrying surface 111 of the base 110, and the sensor is used to sense whether the device 200 to be charged is placed on the carrying surface 111. The type of the sensor may be a pressure sensor, and it is determined whether the device 200 to be charged is placed on the bearing surface 111 by using the pressure change of the device 200 to be charged placed on the bearing surface 111. The sensor may also be an infrared sensor or a distance sensor, when the device 200 to be charged is placed on the bearing surface 111 of the seat 110, the device 200 to be charged shields the sensor, and the sensor can detect the device 200 to be charged. The type of sensor is not limited herein.

According to the positioning information, the wireless charging stand 100 drives the transmission coil 120 to move through the driving mechanism 130, so that the transmission coil 120 is aligned with the receiving coil 201.

It should be noted that the reference to "the transmitting coil 120 is aligned with the receiving coil 201" in this application includes a perfect alignment and an alignment within a certain error range. For example, when the transmitting coil 120 and the receiving coil 201 are completely aligned, the center of the transmitting coil 120 coincides with the orthographic projection of the center of the receiving coil 201 on the bearing surface 111. In order to ensure good electromagnetic transmission efficiency, the allowable error of "aligning the transmitting coil 120 with the receiving coil 201" may be less than 1.5cm, and at this time, the center of the transmitting coil 120 and the orthographic projection of the center of the receiving coil 201 on the bearing surface 111 are not coincident, and the offset distance is less than 1.5 cm. The offset distance is a straight-line distance between a point of the orthographic projection of the center of the transmitting coil 120 on the bearing surface 111 and a point of the orthographic projection of the center of the receiving coil 201 on the bearing surface 111.

Through the cooperation of the transmitting coil 120 and the receiving coil 201, the wireless charging stand 100 charges the device 200 to be charged. Specifically, since the transmitting coil 120 is aligned with the receiving coil 201 under the driving of the driving mechanism 130, after the transmitting coil 120 is powered on, the transmitting coil 201 converts the electric energy into the magnetic energy, so that the receiving coil 201 generates the current under the changing magnetic field to charge the device to be charged 200.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a wireless charging seat for charge for treating the battery charging outfit, treat that the battery charging outfit embeds has receiving coil and a UWB label, its characterized in that, wireless charging seat includes:

2. The wireless charging cradle according to claim 1, wherein at least 4 second UWB tags are provided in said cradle.

3. The wireless charging dock of claim 2, wherein at least one of the second UWB tags disposed in the cradle is located in a different mounting plane from other second UWB tags, the mounting plane is parallel to the carrying surface, and the receiving coil is located on a side of the mounting plane opposite to the carrying surface.

4. The wireless charging dock of claim 1, wherein a control circuit board is disposed in the cradle, the control circuit board has a power circuit electrically connected to an external power source, the transmitting coil and the second UWB tag are both electrically connected to the power circuit, and when the control circuit board is powered on by an external power source, the external power source supplies power to the second UWB tag through the power circuit.

5. The wireless charging cradle according to claim 4, wherein the control circuit board is provided with a control module, and when the driving mechanism drives the transmitting coil to move to be aligned with the receiving coil, the control module controls the power circuit to supply power to the transmitting coil so as to charge the device to be charged on the carrying surface.

6. The wireless charging cradle according to claim 5, wherein the driving mechanism comprises a first moving component and a movable plate, the first moving component is used for driving the movable plate to move in a translational manner along a first direction, a plane of the movable plate in the translational manner is substantially parallel to the carrying surface, and the transmitting coil is disposed on the movable plate;

7. The wireless charging cradle of claim 6, wherein when the driving mechanism comprises a first moving assembly and a second moving assembly, the first moving assembly is identical in structure to the second moving assembly.

8. The wireless charging dock of claim 7, wherein the movable plate is mounted on the second moving assembly to move in a translational manner along a second direction under the driving of the second moving assembly, the second moving assembly is connected to the first moving assembly, and the first moving assembly can drive the second moving assembly to move in a translational manner along a first direction.

9. The wireless charging stand according to claim 7 or 8, wherein the second moving assembly comprises a transmission rack, an engaging wheel and a driving motor, the transmission rack is connected with the movable plate, the engaging wheel is engaged with the transmission rack, and the engaging wheel can be driven by the driving motor to engage and drive the transmission rack to move back and forth, so that the transmission rack drives the movable plate to move in the base.

10. The wireless charging stand according to claim 9, wherein a reduction gear set is provided between the output shaft of the driving motor and the meshing wheel, and when the output shaft of the driving motor rotates, the reduction gear set changes the transmission ratio of the output shaft to the meshing wheel.

11. A method for charging using the wireless charging cradle of any one of claims 1-10, the method comprising: