CN112531926B

CN112531926B - Wireless charging system

Info

Publication number: CN112531926B
Application number: CN202011395179.7A
Authority: CN
Inventors: 王文明; 宋超
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2023-04-07
Anticipated expiration: 2040-12-03
Also published as: CN112531926A

Abstract

The invention discloses a wireless charging system, which comprises a device to be charged and a charging device, wherein the charging device comprises a charging unit and a charging unit; a receiving coil provided in the device to be charged; the transmitting coil is arranged on the charging equipment; the first magnetic attraction piece is arranged in the equipment to be charged; the second magnetic attraction piece is arranged in the charging equipment; at least one of the two magnetic parts of the second magnetic part and the first magnetic part is a magnetic coil; when direct current is introduced into the magnetic coil, the magnetic coil generates magnetic field force. The utility model provides an among the wireless charging system realize that transmitting coil and receiving coil adsorb the second of counterpointing and inhale the piece and inhale the coil with first magnetism and have at least one adoption magnetism in the piece, reduced magnetism and inhaled shared space volume and weight of piece, be favorable to treating the extensive application of battery charging outfit and battery charging outfit's lightweight miniaturization and wireless charging technique, promote user and use experience.

Description

Wireless charging system

Technical Field

The invention relates to the technical field of wireless charging, in particular to a wireless charging system.

Background

With the rapid development of electronic information technology, various electronic devices such as smart phones, pads and other electronic devices are widely used in daily life, work and study of people. At present, conventional electronic equipment is mainly charged by using data lines, each piece of electronic equipment is provided with one data line, the problem that the number of the data lines of the electronic equipment is large and the electronic equipment is inconvenient to store is caused, and if the electronic equipment is lost or forgotten to carry, the charging and the use of the electronic equipment by a user are inconvenient.

The wireless charging technology is that electromagnetic induction is generated by a transmitting coil and a receiving coil which are introduced with alternating current, so that electric energy in the transmitting coil is transmitted to the receiving coil, and charging of an electric component connected with the receiving coil is realized. The wireless charging technology does not need to adopt an entity data line to connect the equipment to be charged and the charging equipment, and the problem of inconvenient use caused by the data line can be well solved.

Disclosure of Invention

The invention aims to provide a wireless charging system which is beneficial to miniaturization and light weight of equipment charged by adopting a wireless charging technology.

In order to solve the above technical problem, the present invention provides a wireless charging system, including a device to be charged and a charging device; a receiving coil provided in the device to be charged; a transmitting coil disposed at the charging device; the first magnetic suction piece is arranged in the charging equipment; the second magnetic attraction piece is arranged in the equipment to be charged;

at least one of the two magnetic parts of the second magnetic part and the first magnetic part is a magnetic coil; when direct current is introduced into the magnetic attraction coil, the magnetic attraction coil generates magnetic field force.

Optionally, one of the two magnetic parts of the second magnetic part and the first magnetic part is the magnetic coil, and the other magnetic part is a permanent magnet; the magnetic coil is connected with a controller;

when the magnetic attraction coil induces the magnetic field of the permanent magnet to generate induced current, the controller controls the magnetic attraction coil to be connected with direct current, so that the magnetic attraction coil generates magnetic field force which is mutually adsorbed with the permanent magnet.

Optionally, the magnetic coil is the first magnetic part arranged in the inner ring of the receiving coil, and an accelerometer connected with the controller is further arranged in the device to be charged;

when the accelerometer detects that the acceleration of the equipment to be charged is 0, the controller controls to cut off the direct current connected to the magnetic coil and connects the magnetic coil to the storage battery of the equipment to be charged.

Optionally, the second magnetic attraction piece and the first magnetic attraction piece are both the magnetic attraction coil; each magnetic attraction coil is connected with a controller;

when the controller receives a charging trigger instruction, the controller controls the magnetic attraction coils to be connected with direct current, so that the two magnetic attraction coils generate magnetic field force which is mutually adsorbed.

Optionally, the two magnetically attracting coils include a first magnetically attracting coil and a second magnetically attracting coil; the first magnetic coil is connected with the first controller, and the second magnetic coil is connected with the second controller;

when the first controller receives a charging trigger instruction, the first controller controls the first magnetic attraction coil to be connected with direct current, so that the first magnetic attraction coil generates a magnetic field;

when the second magnetic attraction coil induces the magnetic field of the first magnetic attraction coil to generate corresponding induced current, the second controller controls the second magnetic attraction coil to be connected with direct current, so that the second magnetic attraction coil generates magnetic field force which is mutually attracted with the first magnetic attraction coil.

Optionally, the second magnetic part is the receiving coil, and the first magnetic part is the transmitting coil.

Optionally, the magnetic coil is connected with a controller; the controller is used for collecting the induced current of the receiving coil, and when the induced current is smaller than a preset current, the controller controls and increases the direct current connected into the magnetic coil.

Optionally, the magnetic attraction coil is a coil in which a difference between a tuning frequency and tuning frequencies of the receiving coil and the transmitting coil is not less than a preset frequency difference.

Optionally, the attaching surfaces of the charging device and the device to be charged are provided with a convex structure and a concave structure which are matched and aligned with each other; the attaching surface is a surface on which the charging equipment and the equipment to be charged are attached to each other when the transmitting coil and the receiving coil are aligned to each other.

Optionally, the conforming surface is provided with a rubber layer.

The invention provides a wireless charging system, which comprises a device to be charged and a charging device; a receiving coil provided in the device to be charged; the transmitting coil is arranged on the charging equipment; the first magnetic attraction piece is arranged in the charging equipment; the second magnetic attraction piece is arranged in the equipment to be charged; at least one of the two magnetic parts of the second magnetic part and the first magnetic part is a magnetic coil; when direct current is introduced into the magnetic coil, the magnetic coil generates magnetic field force.

In the wireless charging system, in order to ensure that a transmitting coil in charging equipment can charge the transmitting coil in equipment to be charged more efficiently, a first magnetic attraction piece and a second magnetic attraction piece are respectively arranged in the charging equipment and the equipment to be charged, and mutual alignment of the transmitting coil and a receiving coil is realized through the mutual attraction effect of the first magnetic attraction piece and the second magnetic attraction piece; and this first magnetism is inhaled and is inhaled in piece and the second magnetism and inhale the piece and adopt magnetism to inhale the coil at least one, for magnet parts such as magnet, magnetism inhales the coil and has reduced the volume of the shared space of magnetism and inhale the weight of piece, is favorable to treating the light miniaturization of battery charging outfit and the wide application of wireless charging technique, and the user of being convenient for treats battery charging outfit and uses and carry, promotes user's use and experiences.

Drawings

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

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

Detailed Description

In the practical application of the wireless charging technology, the electric energy is mainly transmitted by means of electromagnetic induction between the transmitting coil and the receiving coil. The efficiency of power transmission between the transmitting coil and the receiving coil is high or low, and is directly influenced by the alignment accuracy between the transmitting coil and the receiving coil. Theoretically, when the central axes of the transmitting coil and the receiving coil coincide, the power transmission efficiency is the highest. When the transmitting coil and the receiving coil are used for charging, the transmitting coil and the receiving coil are respectively arranged in the charging equipment and the equipment to be charged. The alignment between the transmitting coil and the receiving coil needs to be realized through the alignment between the charging device and the device to be charged.

Two parts or equipment that are common at present carry out the counterpoint mode of relative position and have a variety, for example, set up mechanical structure such as buckle structure of mutually supporting respectively on two equipment, still for example at the magnetism of the more convenient to operate of electronic equipment counterpoint structure. In a conventional magnetic attraction alignment structure, a permanent magnet or a similar magnet is generally disposed in each of two devices, so that the two magnets generate attraction force to align the two devices.

The magnetic attraction alignment mode has the defect that the magnetic field force generated by the magnets generating the magnetic field force which is mutually adsorbed is directly positively correlated with the volume of the magnets, and the volume of the magnets and the weight of the magnets are obviously positively correlated. If the magnet is applied to the charging equipment and the equipment to be charged, in order to provide the adsorption force which is enough to adsorb the charging equipment and the equipment to be charged, the volume and the weight of the magnet need to meet certain specification requirements, the volume and the weight of the magnet are also required to meet certain specification requirements, the space volume occupied by the magnet on the charging equipment and the equipment to be charged is increased to a certain extent, the weight of the charging equipment and the equipment to be charged is increased, and the development trend of light weight and miniaturization of the charging equipment and the equipment to be charged is not met.

Therefore, the technical scheme that on the basis that mutual adsorption between the charging device and the device to be charged is guaranteed, the weight and the size of the charging device and the device to be charged are reduced is provided.

In order that those skilled in the art will better understand the disclosure, reference will now be made in detail to the embodiments of the disclosure as illustrated in the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

As shown in fig. 1, fig. 1 is a schematic diagram of a wireless charging system provided in an embodiment of the present application, where the system may include:

a device to be charged 1 and a charging device 2;

a receiving coil 11 provided in the device to be charged 1, a transmitting coil 21 provided in the charging device 2;

a second magnetic attraction piece 12 arranged in the device to be charged 1, and a first magnetic attraction piece 22 arranged in the charging device 2;

when the magnetic field force between the second magnetic attraction piece 12 and the first magnetic attraction piece 22 is attracted to each other, the receiving coil 11 and the transmitting coil 21 are aligned with each other;

at least one of the two magnetic parts of the second magnetic part 12 and the first magnetic part 22 is a magnetic coil; when direct current is introduced into the magnetic coil, the magnetic coil generates magnetic field force.

The device to be charged in this embodiment may be a mobile phone, a pad, a smart watch, a smart headset, or other various electronic devices. The device to be charged is taken as a mobile phone for example. The receiving coil is also arranged inside the mobile phone, and the charging device can be connected with a charger, a storage battery or a power socket.

When the second magnetic attraction piece 12 and the first magnetic attraction piece 22 attract each other, the distance between the second magnetic attraction piece 12 and the first magnetic attraction piece 22 is the shortest, that is, the attraction state is the most stable when the second magnetic attraction piece 12 faces the first magnetic attraction piece 22. Therefore, the relative positions of the second magnetic element 12 and the receiving coil 11 and the first magnetic element 22 and the transmitting coil 21 can be set properly, so that when the second magnetic element 12 faces the first magnetic element 22, the receiving coil 11 faces the transmitting coil 21 exactly. Generally, the second magnetic attraction piece 12 is arranged at the center of the inner ring of the receiving coil 11, and the first magnetic attraction piece 22 is arranged at the center of the inner ring of the transmitting coil 21.

Of course, the present application also does not exclude the embodiment that the magnetic attraction members are disposed outside the loop of the receiving coil 11 and the transmitting coil 12, for example, a plurality of second magnetic attraction members 12 are symmetrically disposed outside the loop of the receiving coil 11 with the center of the receiving coil 11 as the center of symmetry, and similarly, the first magnetic attraction members 22 may also be disposed in a similar manner.

In addition, the second magnetic attraction piece 12 is disposed in the inner ring of the receiving coil 11, and when the first magnetic attraction piece 22 is disposed in the inner ring of the transmitting coil 21, a plurality of second magnetic attraction pieces 12 may also be disposed symmetrically with the center of the receiving coil 11 as the symmetric center, and a plurality of first magnetic attraction pieces 22 may also be disposed with the center of the transmitting coil 21 as the symmetric center, which is not limited in this application.

Generally, the magnetic attraction structure is a part that generates magnetic attraction force and generally adopts a permanent magnet or other similar magnet structure. To achieve stable alignment adsorption between two devices, it is necessary to estimate the magnetic field force of the alignment adsorption of the two devices according to the weights of the two devices and the specific application scenarios, and accordingly select a magnet capable of generating a magnetic field force sufficient to adsorb the two devices. It follows that the greater the attraction force required to attract two devices to each other, the greater the volume and weight of the magnet. The magnet device with larger volume and weight is arranged in some electronic devices which are carried with users or used in a moving way, obviously, the moving and carrying of the electronic devices can cause inconvenience to a certain degree, and the use experience of the users is reduced.

Adopt magnetism to inhale coil in this application and replace conventional magnet, after letting in direct current in the coil is inhaled to magnetism, magnetism inhales the coil and also can produce invariable magnetic field force equally. And for the permanent magnet need change weight and volume increase magnetic field force, magnetism inhale the coil and only need change the direct current size of inserting in magnetism and inhale the coil, can change magnetic field force size, need not to increase the volume of inhaling the coil, and magnetism inhale the coil and for the magnet quality is littleer. From this, it can be seen that the coil is inhaled to adoption magnetism in this application replaces the magnet can avoid to a certain extent because of magnetism inhale the too big and overweight equipment weight and the problem of volume increase that make to use wireless charging technique of piece.

In this embodiment, at least one of the second magnetic element 12 and the first magnetic element 22 is a magnetic coil. That is, the second magnetic attraction piece 12 and the first magnetic attraction piece 22 may be both magnetic attraction coils, or one of the second magnetic attraction piece 12 and the first magnetic attraction piece 22 may be a magnetic attraction coil, and the other may be a magnetic attraction component such as a permanent magnet.

Because the magnetic coil generates magnetic force, a direct current needs to be supplied to the magnetic coil, that is, the magnetic coil consumes electric energy. Then, for the device to be charged 1, there is a situation of insufficient power supply itself, and in the case of extremely low electric quantity of the device to be charged 1, there may be a problem of difficulty in supplying power to the magnetic attraction coil, and based on this problem, it may be considered that the second magnetic attraction piece 12 in the device to be charged 1 employs a permanent magnet, and the second magnetic attraction piece 21 in the charging device 2 employs a magnetic attraction coil.

On the other hand, the charging device 2 is not carried frequently, for example, a mobile phone and a mobile phone charger, the user often takes the mobile phone for a long time instead of the mobile phone charger, and the weight and the volume of the mobile phone further affect the user experience. Therefore, based on the problem, the magnetic coil can be used in the device to be charged 1, and the permanent magnet is used in the charging device 2, so that the energy consumption of the second magnetic part 21 in the charging device 2 is reduced, and the purpose of reducing the mass and the volume of the device to be charged 1 is achieved.

Further, considering that the electronic device that the user needs to use also needs to carry the charging device 2, the electronic device is too heavy and too large for the user and the charging device 2 is inconvenient to carry. Therefore, it is necessary to lighten the devices 1 and 2 to be charged, and the magnetic coils can be used for the second magnetic attraction pieces 12 and the first magnetic attraction pieces 22 in the devices 1 and 2 to be charged.

For the specific selection mode of the magnetic attraction pieces in the device 1 to be charged and the charging device 2, a suitable configuration mode can be selected according to the specific type of the electronic device and the practical application environment, and no specific limitation is imposed on the configuration mode in this application.

To sum up, among the wireless charging equipment in this application, inhale coil switch-on direct current through magnetism and produce magnetic field force and realize treating counterpoint between charging equipment and the charging equipment and adsorb, and then realize treating counterpoint of receiving coil and transmitting coil among charging equipment and the charging equipment, on the basis of guaranteeing high efficiency transmission energy between transmitting coil and the receiving coil, avoid producing the too big and overweight problem of magnetism piece of inhaling of magnetic field force, guarantee to use the light and the miniaturization of the electronic equipment that wireless charging technology charges, be favorable to the wide application of wireless charging technology, and promote user's use and experience.

Based on the above discussion, there are embodiments in which both the magnetic attraction coil and only one of the magnetic attraction coil are present in the device to be charged 1 and the charging device 2. Various embodiments will now be described in detail with reference to specific examples.

In an alternative embodiment of the present application, one of the two magnetic attraction members, the second magnetic attraction member 12 and the first magnetic attraction member 22, is a magnetic attraction coil, and the other magnetic attraction member is a permanent magnet;

the magnetic coil is connected with a controller; when the magnetic coil induces the magnetic field generated by the permanent magnet to generate induced current, the controller controls the magnetic coil to be connected with direct current, so that the magnetic coil generates magnetic field force which is mutually adsorbed with the permanent magnet.

Because the second is inhaled a 12 and is inhaled one of two magnetism of 22 magnetism of piece and inhale the coil for magnetism, another magnetism is inhaled the piece and is the permanent magnet, so the second is inhaled a 12 and is inhaled when piece 22 adsorbs each other with first magnetism, also is equivalent to the permanent magnet and inhale the coil and adsorb each other.

Obviously, if the magnetic coil is always kept in the energized state, although the magnetic coil can always generate magnetic field force, the magnetic coil consumes relatively much electric energy. For this purpose, the magnetic coil can be charged only when the device to be charged 1 and the charging device 2 need to be aligned.

When waiting to charge equipment 1 and need charge, waiting to charge equipment 1 and charging apparatus 2 can be close to each other promptly, and then make magnet and magnetism inhale the coil and be close to each other, and magnetism inhales the magnetic field that the coil sensed the magnet, also can produce corresponding induced-current. Therefore, the induced current can be used as the basis for starting to switch on the direct current to the magnetic attraction coil, when the controller detects that the induced current is generated in the magnetic induction coil, the direct current can be controlled to be switched in the magnetic attraction coil, the magnetic field force which is mutually adsorbed with the permanent magnet is generated, and the mutual adsorption of the magnet and the magnetic attraction coil is realized.

Optionally, in order to further improve the charging efficiency between the device to be charged 1 and the charging device 2, the magnetic attraction coil is a second magnetic attraction piece 12 in the device to be charged 1. After the magnetic coil and the magnet are mutually adsorbed to realize mutual alignment of the transmitting coil 21 and the receiving coil 11, the magnetic coil can also be converted into the receiving coil to receive the electric energy transmitted by the transmitting coil 21.

For this purpose, an accelerometer 14 connected to the controller may be further provided in the device to be charged 1 to identify whether the alignment between the device to be charged 1 and the charging device 2 is completed.

When the device to be charged 1 needs to be charged, the charging device 2 is generally placed still, and the device to be charged 1 and the charging device 2 are aligned with each other by moving the device to be charged 1 close to the charging device 2 under the driving of the magnetic field adsorption force. When the alignment between the device to be charged 1 and the charging device 2 is completed, the device to be charged 1 does not move any more, and the acceleration data measured by the accelerometer 14 in the device to be charged 1 is also 0.

For this reason, when it is collected that the accelerometer 14 detects that the acceleration of the device to be charged is 0, the controller controls to turn off the direct current connected to the magnetic coil and turn on the magnetic coil to the storage battery of the device to be charged 1. When the magnetic coil is no longer connected with the direct current, the magnetic coil can induce the magnetic field of the transmitting coil 21 and generate induced current, and the magnetic coil is connected with the storage battery, so that the induced current generated in the magnetic coil can be input into the storage battery, and the magnetic coil can also have the function of the receiving coil 11 to charge the storage battery of the device to be charged 1, thereby improving the charging efficiency between the device to be charged 1 and the charging device 2.

Of course, in the practical application process, it is not only determined whether the alignment between the device to be charged 1 and the charging device 2 is completed according to the acceleration data detected by the accelerometer 14 in the device to be charged 1.

For example, the controller may detect the magnitude of the induced current in the receiving coil 11, and the larger the induced current in the receiving coil 11 is, the higher the efficiency of power transmission between the receiving coil 11 and the transmitting coil 21 is, and based on the magnitude of the induced current that can be achieved when the receiving coil 11 and the transmitting coil 21 are accurately aligned and the currently measured magnitude of the induced current, it may be determined whether the receiving coil 11 and the transmitting coil 21 are accurately aligned.

In another alternative embodiment of the present application, the second magnetically attractive element 12 and the first magnetically attractive element 22 are both magnetically attractive coils; each magnetic coil is connected with a controller;

In order to avoid the problem that the two magnetic coils continuously keep charging and can cause electric energy waste. The method can be carried out when the controllers respectively connected with the two magnetic coils receive a charging trigger instruction, and the two magnetic coils are respectively connected with direct current for alignment.

The charging trigger instruction may have various trigger forms, and for example, a charging start switch may be provided on the device to be charged 1 and the charging device 2. A user can trigger the controller through the charging starting switch to control the magnetic attraction coil to be connected with direct current.

In another optional embodiment of the present application, the two magnetically attractive coils comprise a first magnetically attractive coil and a second magnetically attractive coil; the first magnetic coil is connected with the first controller 13, and the second magnetic coil is connected with the second controller 23;

when the first controller 13 receives the charging trigger instruction, the first controller 13 controls the first magnetic attraction coil to switch on the direct current, so that the first magnetic attraction coil generates a magnetic field;

when the second magnetic attraction coil induces the magnetic field of the first magnetic attraction coil to generate a corresponding induced current, the second controller 23 controls the second magnetic attraction coil to switch on the direct current, so that the second magnetic attraction coil generates a magnetic field force attracting the first magnetic attraction coil mutually.

Similarly, the charging trigger instruction received by the first controller 13 may be generated by the user controlling the charging start switch to trigger, so as to implement the access of the dc current of the first magnetic coil. And for the access of the direct current in the second magnetic coil, the mode of switching on the direct current to the magnetic coil after the magnetic coil induces the magnetic field of the permanent magnet to generate induced current is similar to that in the embodiment.

Certainly, in the practical application process, the first controller 13 and the second controller 23 may also respectively realize that the first magnetic attraction coil and the second magnetic attraction coil are connected with the direct current through two charging trigger instructions triggered by the user.

In addition, after receiving a charging trigger instruction input by a user, the first controller 13 may control the first magnetic attraction coil to switch on the direct current, and forward the charging trigger instruction to the second controller 23, so as to switch on the direct current by the second magnetic attraction coil.

When the second magnetic element 12 and the first magnetic element 22 are both magnetic coils, in another alternative embodiment of the present application, the second magnetic element 21 can be a receiving coil, and the second magnetic element 12 can be a transmitting coil.

That is to say, in this embodiment, the second magnetic attraction piece 12 and the first magnetic attraction piece 22 do not need to be additionally provided, but before the transmitting coil 21 and the receiving coil 11 are charged, the receiving coil 11 and the transmitting coil 21 are firstly powered by direct current, and the receiving coil 11 and the transmitting coil 21 are used as the magnetic attraction pieces, so that the receiving coil 11 and the transmitting coil 21 are mutually attracted and aligned, and after the alignment is completed, the receiving coil 11 and the transmitting coil 21 are used for charging. In this embodiment, the receiving coil 11 and the transmitting coil 21 are directly used as magnetic attraction members, so that functions of the receiving coil 11 and the transmitting coil 21 are expanded to a certain extent, structures of the device to be charged 1 and the charging device 2 in the wireless charging technology are simplified, and weight of the device is further improved.

Of course, in the embodiment where the second magnetic-attracting element 12 and the first magnetic-attracting element 22 are both magnetic-attracting coils, the two magnetic-attracting coils are not necessarily the receiving coil 11 and the transmitting coil 21, and one magnetic-attracting coil may be respectively disposed in the receiving coil 11 and the transmitting coil 21. Similar to the above embodiment in which the magnetic coils can be converted into the receiving coil 11, in this embodiment, after the alignment of the receiving coil 11 and the transmitting coil 21 is completed, the two magnetic coils can also be converted into the receiving coil 11 and the transmitting coil 21, respectively, so as to improve the charging efficiency.

Based on the above discussion, it is considered that, in the charging process after the alignment is implemented, the device to be charged 1 and the charging device 2 may also be placed in a non-horizontal stacked manner, and if the magnetic field force absorbed by the device to be charged 1 and the charging device 2 disappears, the device to be charged 1 may slip off the charging device 2; or the charging process is performed in a non-static environment such as an automobile, and the device to be charged 1 and the charging device 2 cannot maintain stable alignment due to vibration in the environment, which may cause alignment failure of the device to be charged 1 and the charging device 2 in the charging process.

For this reason, in another optional embodiment of the present application, during the charging process of the device to be charged 1 and the charging device 2, the magnetically attracting coil may be kept in a state of continuously turning on the dc current all the time. That is to say that the coil of inhaling can not convert receiving coil 11 and transmitting coil 21 into all the time, and then guarantees to have stronger adsorption affinity all the time between equipment 1 and the charging equipment 2 waiting to charge.

Further, in order to ensure the stability of the mutual adsorption state between the device to be charged 1 and the charging device 2 during the charging process, the controller connected to the magnetic coil may be further utilized to detect the magnitude of the induced current of the receiving coil 11 in real time, and when the induced current is smaller than the preset current magnitude, the controller controls to increase the direct current in the magnetic coil.

When the direct current in the magnetic coil is increased, the magnetic field force generated by the magnetic coil is also increased. When waiting that battery charging outfit 1 and battery charging outfit 2 are because not the level pile up and place or because the vibration produces relative movement, the magnetic field force size of coil is inhaled to increase that can be timely to guarantee to wait that battery charging outfit 1 and battery charging outfit 2 can guarantee counterpoint adsorption state, and then guarantee energy transmission efficiency between transmitting coil 21 and the receiving coil.

Of course, the manner of avoiding the relative sliding between the device to be charged 1 and the charging device 2 is not limited to the manner of controlling the direct current of the magnetic attraction coil. In another optional embodiment of the present application, the fitting surfaces of the device to be charged 1 and the charging device 2 are provided with a convex structure and a concave structure which are matched and aligned with each other; the attaching surface is a surface to which the device to be charged 1 and the charging device 2 are attached to each other when the transmission coil 21 and the reception coil 11 are aligned with each other.

Treat that battery charging outfit 1 and battery charging outfit 2 adsorb the surface setting of laminating each other protruding structure and groove structure that mutually support, when treating battery charging outfit 1 and battery charging outfit 2 counterpoint each other, protruding structure card goes into groove structure just, can enough avoid treating between battery charging outfit 1 and the battery charging outfit 2 at the in-process relative movement that charges, also is favorable to treating the counterpoint between battery charging outfit 1 and the battery charging outfit 2.

Besides, the rubber layer can be arranged on the attaching surface of the mutual adsorption and attachment of the charging equipment 1 and the charging equipment 2, the friction force between the charging equipment 1 and the charging equipment 2 is increased, and the relative movement between the charging equipment 1 and the charging equipment 2 in the charging process is avoided. And, set up protruding structure and groove structure and rubber layer simultaneously at the laminating surface of treating charging equipment 1 and charging equipment 2 for charging equipment and charging equipment are not accomplishing when counterpointing, the contact of two laminating surfaces each other laminating is only at the top of protruding structure, even if there is the rubber layer, frictional force is also less between the two, do not influence treating that charging equipment 1 and charging equipment 2 move relatively under the drive of magnetic field force, and after treating that charging equipment 1 and charging equipment 2 accomplish counterpointing, the contact surface increase between the two, the rubber layer is favorable to increasing the laminating surface friction between treating charging equipment 1 and charging equipment 2, avoid two equipment relative movement, and then guarantee the relative stability of two equipment counterpoints.

As mentioned above, the magnetic attraction coil is generally disposed at the inner ring center position of the receiving coil and the transmitting coil 21, and in order to avoid mutual interference between the magnetic field generated by the receiving coil and the transmitting coil 21 and the magnetic field generated by the magnetic attraction coil, the magnetic attraction coil may be a coil in which the difference between the tuning frequency and the tuning frequencies of the receiving coil and the transmitting coil 21 is not less than the preset frequency difference, so as to reduce mutual interference between the magnetic attraction magnetic field and the power transmission magnetic field.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include elements inherent in the list. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element. In addition, parts of the technical solutions provided in the embodiments of the present application that are consistent with implementation principles of corresponding technical solutions in the prior art are not described in detail, so as to avoid redundant description.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A wireless charging system is characterized by comprising a device to be charged and a charging device; a receiving coil provided in the device to be charged; a transmitting coil disposed at the charging device; wherein the receiving coil and the transmitting coil are coils for charging; the first magnetic attraction piece is arranged in the charging equipment; the second magnetic attraction piece is arranged in the equipment to be charged;

the second magnetic suction piece and the first magnetic suction piece are both magnetic suction coils; when direct current is introduced into the magnetic coil, the magnetic coil generates magnetic field force;

the second magnetic part is the receiving coil, and the first magnetic part is the transmitting coil;

each magnetic attraction coil is connected with a controller;

when the controller receives a charging trigger instruction, the controller controls the magnetic attraction coils to be connected with direct current, so that the two magnetic attraction coils generate magnetic field force which is mutually adsorbed;

the two magnetic attraction coils comprise a first magnetic attraction coil and a second magnetic attraction coil; the first magnetic coil is connected with the first controller, and the second magnetic coil is connected with the second controller;

2. The wireless charging system of claim 1, wherein the magnetically attractive coil is connected to a controller; the controller is used for collecting the induced current of the receiving coil, and when the induced current is smaller than a preset current, the controller controls and increases the direct current connected into the magnetic coil.

3. The wireless charging system of claim 1, wherein the magnetically attractive coil is a coil having a tuning frequency that differs from the tuning frequencies of the receiving coil and the transmitting coil by no less than a predetermined frequency difference.

4. The wireless charging system of claim 1, wherein the attaching surfaces of the charging device and the device to be charged are provided with a convex structure and a concave structure which are matched and aligned with each other; the attaching surface is a surface on which the charging equipment and the equipment to be charged are attached to each other when the transmitting coil and the receiving coil are aligned to each other.

5. The wireless charging system of claim 4, wherein the conformable surface is provided with a rubber layer.