CN215300283U - Wireless charging system - Google Patents

Abstract

The utility model discloses a wireless charging system, wireless charging system includes: the wireless charger comprises a transmitting coil and a transmitting converter, wherein the transmitting converter is used for generating an electromagnetic field with high-frequency change around the transmitting coil; and the terminal comprises a receiving coil, a receiving converter and a battery, wherein the receiving coil is used for inducing the relative position change of the terminal and converting direct current into the battery for charging through the receiving converter. The utility model discloses a wireless charging system through the power management system priority awaken up in the terminal, implements the adaptation ground again and charges to the terminal, can effectively promote charge efficiency and charging control management.

Description

Wireless charging system

Technical Field

The utility model relates to a wireless charging technology field specifically is a wireless charging system.

Background

The wireless charging technology belongs to the leading edge technology, and its leading principle is for carrying out the transmission of electric energy through the non-contact mode, and after the wireless product preparation that charges was accomplished, in order to its offset of more deep understanding to charging current's influence and the influence of the offset to charging efficiency in the charging process, need carry out the multidimension degree test to the distance of charging to the performance of better understanding product.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wireless charging system to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a wireless charging system, the wireless charging system comprising:

the wireless charger comprises a transmitting coil and a transmitting converter, wherein the transmitting converter is used for generating an electromagnetic field with high-frequency change around the transmitting coil;

and the terminal comprises a receiving coil, a receiving converter and a battery, wherein the receiving coil is used for inducing the relative position change of the terminal and converting direct current into the battery for charging through the receiving converter.

Furthermore, the terminal also comprises a power management system, and the wireless charger wakes up the power management system in the terminal and charges the terminal according to the position relation between the wireless charger and the terminal.

Further, the receiving coil comprises a first coil and a second coil;

wherein the content of the first and second substances,

the first coil is used for inducing the change of the coupling degree between the first coil and the transmitting coil so as to judge the relative position relationship between the wireless charger and the terminal;

the second coil converts direct current to charge the battery through a receiving converter.

According to the above technical scheme, the utility model discloses a power management system in to the terminal is preferred to be awaken up, implements adaptation ground again and charges to the terminal, can effectively promote charge efficiency and charging control management.

Drawings

Fig. 1 is a schematic structural diagram of a wireless charging system according to the present invention;

fig. 2 is a schematic structural diagram of another embodiment of a wireless charging system provided by the present invention;

fig. 3 is a flowchart of a wireless charging method provided by the present invention;

fig. 4 is a more detailed flowchart of the wireless charging method illustrated in fig. 3;

fig. 5 is a sub-flowchart of step S20 shown in fig. 4 in the first embodiment;

fig. 6 is a sub-flowchart of step S20 shown in fig. 4 in a second embodiment;

FIG. 7 is another more detailed flowchart of the wireless charging method of FIG. 3;

FIG. 8 is a sub-flowchart of step 40 shown in FIG. 4 in a first embodiment;

FIG. 9 is a sub-flowchart of step 40 shown in FIG. 4 in a second embodiment;

fig. 10 is a sub-flowchart of step 40 shown in fig. 4 in a third embodiment.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution in the embodiments of the present invention will be clearly described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first" and "second," and the like, appearing in the specification, claims, and drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Referring to fig. 1, fig. 1 is a schematic diagram of a wireless charging system with a wireless charging function according to another embodiment of the present invention. As shown in fig. 1, a wireless charging system according to an embodiment of the present invention includes the following components:

the wireless charger 1 comprises a transmitting coil 11 and a transmitting converter 12, wherein the transmitting converter 12 is used for the transmitting coil 11 to generate an electromagnetic field with high-frequency change around;

the terminal 2 comprises a receiving coil 21, a receiving converter 22 and a battery 23, wherein the receiving coil 21 is used for sensing the relative position change of the terminal 2 and converting direct current into the battery for charging through the receiving converter 22;

the wireless charger 1 adopts resonant coupling type transmission, for example, the wireless charger 1 is connected with a mains supply 220V and is converted into a high-frequency alternating current signal through a transmitting converter 12, wherein the wireless charger is to be understood as firstly converting the 220V alternating current mains supply into 360V direct current through a rectifying and transforming circuit, then converting the 360V direct current into 80-100Khz alternating current through an inverter and a high-frequency oscillator, and realizing high-efficiency radio transmission through a resonant coupling principle; the transmitting coil 11 generates an electromagnetic field with high frequency variation within a certain range of distance around, and when the receiving coil 21 moves into the electromagnetic field, the high frequency variation of the magnetic flux of the transmitting coil 11 generates a certain high frequency induced electromotive force in the receiving coil 21. The receiving coil 21 also induces 360V induced electromotive force, 360V alternating current is converted into 145V direct current through rectification and transformation current of the receiving converter 22, 145V voltage is divided into two paths to work, one path is converted into 48V direct current through a wide voltage range DCDC to charge the battery 23, the other path is converted into 12V direct current through direct current DCDC in the wireless charger to supply power for the power management system, when the power management system is powered on, charging handshake can be carried out, and after the handshake succeeds, current corresponding to the battery can be charged according to a protocol.

Referring to fig. 2, fig. 2 is another embodiment of a wireless charging system with a wireless charging function according to the present invention, in which two DCDC converters are used to implement operation, and a small coil is disposed in a receiving coil to implement relative position sensing with respect to the wireless charger 1 and the terminal 2 and to wake up the power management system.

The receiving coil includes a first coil 211 (i.e. a small coil) and a second coil 212, and the first coil 211 is used for inducing the change of the coupling degree between the first coil 211 and the transmitting coil 11 so as to determine the relative position relationship between the wireless charger 1 and the terminal 2; the second coil 212 induces the electromotive force of the transmitting coil 11 and converts the direct current to charge the battery 23 through the receiving converter 22; judging the relative position relationship between the wireless charger 1 and the terminal 2 according to the coupling degree change of the first coil 211 and the transmitting coil 212, and determining whether the charging condition is met according to the relative position relationship;

for example, the wireless charger is connected with a 220V commercial power, and is converted into a high-frequency alternating-current signal through the transmitting converter 1, wherein the high-frequency alternating-current signal is obtained by firstly converting the 220V commercial power into a 360V direct-current power through a rectifying and transforming circuit, then converting the 360V direct-current power into an alternating-current power of 80-100Khz through an inverter and a high-frequency oscillator, and realizing high-efficiency radio transmission through a resonance coupling principle; when the transmitting coil 11 generates an electromagnetic field with high-frequency variation within a certain range of distance around the receiving coil 21 (including the first coil 211 and the second coil 212) moves into the electromagnetic field, the high-frequency variation of the magnetic flux of the transmitting coil 11 generates a certain high-frequency induced electromotive force in the receiving coil 21; the first coil 211 and the second coil 212 induce the induced electromotive force of 360V, and convert the 360V ac into the dc of 145V by receiving the rectified and transformed current of the converter 22, at this time, the dc of 145V is switched into two paths through two DCDC converters to work, one path adopts the wide voltage range DCDC to convert into the dc of 48V to charge the battery 23, the other path adopts the wide voltage range DCDC to convert into the dc of 12V to power the power management system, when the power management system is powered on, the charging handshake is performed, and after the handshake is successful, the current corresponding to the battery 23 is charged according to the protocol.

Referring to fig. 3, an embodiment of the present invention provides a wireless charging method, which includes the following steps:

and S10, in the charging establishing process, the wireless charger wakes up the power management system in the terminal according to the position relation between the wireless charger and the terminal and charges the terminal.

Please refer to fig. 4, which is a more detailed flowchart of the wireless charging method shown in fig. 3. As shown in fig. 4, the wireless charging method includes:

and S20, judging whether the relative position relation between the wireless charger and the terminal meets the charging condition. If so, S30 is performed, and if not, step S50 is performed. Specifically, the step of "determining whether the relative positional relationship between the wireless charger and the terminal satisfies the charging condition" includes: the wireless charger is provided with a transmitting coil, the terminal is provided with a receiving coil, the relative position relation between the wireless charger and the terminal is judged according to the coupling degree change of the transmitting coil and the receiving coil, and whether the charging condition is met or not is determined according to the relative position relation.

And S30, if so, the wireless charger charges the terminal through the power management system.

S40, adjusting at least one of a charging parameter and a relative positional relationship of the wireless charger and/or the terminal.

S50, if no, charging is not started.

It is understood that the step S40 may be performed in the wireless charging setup and/or the wireless charging process. For example, the step S40 may be performed before the step S20, i.e., before the wireless charger performs charging of the terminal, and may also be performed after the step S30, i.e., after the wireless charger performs charging of the terminal. Alternatively, the step S10 may include only the steps S20, S30, or the step S10 may include only the step S40.

Please refer to fig. 5, which is a sub-flowchart in the first embodiment when the step S20 determines the relative position relationship between the wireless charger and the terminal according to the coupling degree change of the transmitting coil and the receiving coil, and further determines whether the relative position relationship between the wireless charger and the terminal satisfies the charging condition. In this embodiment, the step S20 includes:

s201, the wireless charger is provided with a transmitting coil, the terminal is provided with a receiving coil, the relative position relation between the wireless charger and the terminal is judged according to the coupling degree change of the transmitting coil and the receiving coil, and whether the charging condition is met or not is determined according to the relative position relation;

it should be noted that the method realizes the confirmation of the positional relationship through the change of the coupling degree of the transmitting coil and the receiving coil.

For example, the wireless charging method involves a wireless charger and a terminal, wherein the wireless charger includes a transmitting coil and a transmitting converter, and the terminal includes a receiving coil, a receiving converter and a battery;

the transmitting converter is used for converting commercial power into a high-frequency alternating-current signal after the wireless charger is connected with the commercial power, and the receiving coil is used for inducing the relative position change of the terminal and converting direct current into direct current through the receiving converter to charge the battery;

the wireless charger is connected with a 220V commercial power and is converted into a high-frequency alternating current signal through a transmitting converter, wherein the high-frequency alternating current signal is obtained by firstly converting the 220V alternating current commercial power into 360V direct current through a rectifying and transforming circuit, then converting the 360V direct current into 80-100Khz alternating current through an inverter and a high-frequency oscillator, and realizing high-efficiency radio transmission through a resonance coupling principle; the transmitting coil generates an electromagnetic field with high-frequency change within a certain range of the surrounding distance, and when the receiving coil moves into the electromagnetic field, the high-frequency change of the magnetic flux of the transmitting coil generates certain high-frequency induced electromotive force in the receiving coil. For example, the receiving coil induces 360V induced electromotive force, 360V alternating current is converted into 145V direct current through rectification and transformation current of the receiving converter, 145V voltage is divided into two paths to work, one path is converted into 48V direct current through wide voltage range DCDC to charge the battery, the other path is converted into 12V direct current through direct current DCDC in the wireless charger to supply power to the power management system, when the power management system is powered on, charging handshake is carried out, and after the handshake is successful, current corresponding to the battery is charged according to a protocol.

It should be noted that, in the implementation, the inductive distance between the wireless charger and the terminal may be preset artificially, for example, when the preset inductive distance is set to 40mm, and the receiving coil is located in the electromagnetic field of the transmitting coil, that is, when the effective inductive distance between the receiving coil and the transmitting coil is less than or equal to 40mm, the relative position relationship between the wireless charger and the terminal is determined according to the change of the coupling degree between the transmitting coil and the receiving coil, and whether the charging condition is satisfied is determined according to the relative position relationship.

In addition, it is important to point out that the wireless charging method adopted in the present application has a sequential control logic relationship, that is, a receiving coil in a terminal is induced by a transmitting coil in a wireless charger, and a power management system in the terminal is awakened through low voltage first, and finally the terminal is controlled to be charged through the power management system, so that it can be understood that the battery cannot be charged if the power management system in the terminal cannot be awakened first.

Referring to fig. 6, fig. 6 is a sub-flowchart of the second embodiment when the step S20 determines the relative position relationship between the wireless charger and the terminal according to the coupling degree change of the transmitting coil and the receiving coil, and further determines whether the relative position relationship between the wireless charger and the terminal satisfies the charging condition. In this embodiment, the step S20 includes:

s210, the wireless charger is provided with a transmitting coil, the terminal is provided with a receiving coil, the receiving coil comprises a first coil and a second coil, and the first coil is used for inducing the change of the coupling degree of the first coil and the transmitting coil so as to judge the relative position relationship between the wireless charger and the terminal; the second coil induces the electromotive force of the transmitting coil and converts direct current to charge the battery through the receiving converter.

S211, judging the relative position relation between the wireless charger and the terminal according to the coupling degree change of the first coil and the transmitting coil, and determining whether a charging condition is met according to the relative position relation;

the method comprises the steps of confirming the position relation through the coupling degree change of a first coil and a transmitting coil, and realizing wireless charging transmission through a second coil and the transmitting coil after confirming that the charging condition is met.

The wireless charging method relates to a wireless charger and a terminal, wherein the wireless charger comprises a transmitting coil and a transmitting converter, and the terminal comprises a first coil, a second coil, a receiving converter and a battery;

the transmitting converter is used for converting commercial power into a high-frequency alternating-current signal after the wireless charger is connected with the commercial power, and is also used for triggering the first coil so as to convert Direct Current (DC) into low-voltage direct current after the internal circuit is connected and supply power to the power management system; the first coil is used for inducing the relative position change of the terminal, and the second coil is used for converting direct current to charge the battery through the receiving converter;

it should be noted that the first coil and the second coil are not used to describe whether they are separated or not, or it is understood that the first coil may be a small coil of a part of the receiving coil, and the rest of the coils are second coils divided by an area, or it is understood that the receiving coil includes the first coil and the second coil which are independently disposed coils, and the first coil and the second coil move synchronously and induce electromotive force during the movement of the receiving coil to the electromagnetic field of the transmitting coil.

For example, the wireless charger is connected with a 220V commercial power, and is converted into a high-frequency alternating-current signal through a transmitting converter, wherein the high-frequency alternating-current signal is obtained by firstly converting the 220V commercial power into a 360V direct-current power through a rectifying and transforming circuit, then converting the 360V direct-current power into an 80-100Khz alternating-current power through an inverter and a high-frequency oscillator, and realizing high-efficiency radio transmission through a resonance coupling principle; the transmitting coil generates an electromagnetic field with high-frequency change within a certain range of distance around, and when the receiving coil (comprising the first coil and the second coil) moves into the electromagnetic field, the high-frequency change of the magnetic flux of the transmitting coil can generate certain high-frequency induced electromotive force in the receiving coil; 360V's induced electromotive force has been inducted equally to first coil and second coil, and rectification and vary voltage current through receiving the converter are with 360V alternating current conversion for 145V direct current, and at this moment, 145V direct current switches into two tunnel work through two DCDC converters, adopts wide voltage range DCDC to convert into 48V direct current for one the battery charges, and another way is given for 12V direct current through DCDC145-12V conversion the power management system is electrified, can charge after power management system is electrified and handshake, can charge for the electric current that the battery corresponds according to the agreement after shaking hands successfully.

360V induced electromotive force has been inducted equally to first coil and second coil, rectification and vary voltage current through receiving the converter are with 360V alternating current conversion for 145V direct current, 145V voltage divide into two works, one way is converted into 48V direct current through wide voltage range DCDC and is charged for the battery, another way is converted into 12V through the inside direct current DC of wireless charger, namely, first coil is converted induced electromotive force into 12V electricity and is gone up for power management system, the second coil is converted induced electromotive force into 48V electricity and is charged for the battery, can charge after power management system goes up the electricity and handshake, can charge for the electric current that the battery corresponds according to the agreement after shaking successfully. Here, it should be noted that, if the first coil in the terminal is induced by the transmitting coil in the wireless charger, and the power management system in the terminal is awakened by the 12V low voltage first, and then the terminal is controlled to be charged by the power management system, it can be understood that the battery cannot be charged if the power management system in the terminal cannot be awakened first.

Please refer to fig. 7, which is another more detailed flowchart of the wireless charging method shown in fig. 3. As shown in fig. 7, the wireless charging method includes:

s40, adjusting at least one of a charging parameter and a relative positional relationship of the wireless charger and/or the terminal.

Please refer to fig. 8, which is a sub-flowchart of the first embodiment when the step S40 adjusts at least one of the charging parameters and the relative position relationship of the wireless charger and/or the terminal during the charging setup process. In this embodiment, the S40 includes:

s401, acquiring the current position of the wireless charger and/or the terminal, and generating position information, wherein the position information is used for indicating a controller to control the current position adjustment of the wireless charger and/or the terminal;

the wireless charger is characterized in that a controller is arranged in the wireless charger to realize the operation processing of the position information;

s402, the wireless charger and/or the terminal adjust the position relation according to a preset relative coordinate relation so as to finally adjust to a correct charging position posture;

the wireless charger further comprises a first moving part for controlling the transmitting coil to move, and the terminal is arranged on a second moving part for controlling the receiving coil to move, or the wireless charger comprises the first moving part for controlling the transmitting coil to move, or the terminal is arranged on the second moving part for controlling the receiving coil to move. Here, it should be noted that the moving member is configured to adjust the wireless charger and the terminal to a preset matching position through an adjustment instruction generated by the controller after acquiring the relative position information of the wireless charger and the terminal, so as to ensure that the terminal can be in a normal charging range; meanwhile, the embodiment does not limit the specific structure of the moving part, and is only used for explaining the relative position relationship of the transmitting coil and the receiving coil controlled by the moving part; in addition, it should be noted that, because the transmitting coil and the receiving coil are used for power transmission in the actual wireless transmission process, the moving member is only required to move the coils, and in general, the transmitting coil is assembled inside the wireless charger and is fixed in relative position, and the receiving coil is assembled inside the terminal and is fixed in relative position, so that the first moving member can also be understood as being used for controlling the displacement of the wireless charger, and the second moving member can also be understood as being used for controlling the position of the terminal.

The controller comprises a memory, the memory is preset with the optimal charging position coordinates of the wireless charger and the terminal, and when the wireless charger and/or the terminal are adjusted according to the relative position coordinates, the final correct charging position posture can be achieved.

Please refer to fig. 9, which is a sub-flowchart in the second embodiment when the step S40 adjusts at least one of the charging parameters and the relative position relationship of the wireless charger and/or the terminal during the charging setup process. In this embodiment, the S402 includes:

s4021, the wireless charger and/or the terminal analyze the relative position of the wireless charger and/or the terminal according to a preset algorithm and determine an adjusting path of the relative position of the wireless charger and/or the terminal, and the controller generates an action instruction according to the determined adjusting path;

it should be noted that the controller performs calculation according to the position relationship after acquiring the position information of the wireless charger and/or the terminal, and obtains the optimal adjustment path of the wireless charger and/or the terminal through a preset algorithm, where the adjustment path may generally be understood as the minimum relative movement or the shortest relative movement distance

S4022, the controller controls and adjusts the relative position relation between the wireless charger and the terminal according to the action instruction;

for example, when the wireless charger is not adjustable, after the controller of the terminal equipped with the moving member obtains the relative position information of the terminal relative to the wireless charger, the terminal is controlled to move to the preset relative coordinate position according to the action command generated by the preset algorithm, so as to finally adjust to the correct charging position posture.

Please refer to fig. 10, which is a sub-flowchart in the third embodiment when the step S40 adjusts at least one of the charging parameters and the relative position relationship of the wireless charger and/or the terminal during the charging setup process. In this embodiment, said S40 comprises;

s411, acquiring a charging parameter of the terminal;

the charging parameters of the terminal can be understood as charging parameters of a battery built in the terminal, including charging voltage, current and related data of battery loss, and the data is stored in a built-in memory of a power management system to realize information reading of the wireless charger and the terminal in a charging establishing process;

and S412, the wireless charger charges the terminal according to the charging parameters.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims (3)

1. A wireless charging system, comprising:

the wireless charger comprises a transmitting coil and a transmitting converter, wherein the transmitting converter is used for generating an electromagnetic field with high-frequency change around the transmitting coil;

and the terminal comprises a receiving coil, a receiving converter and a battery, wherein the receiving coil is used for inducing the relative position change of the terminal and converting direct current into the battery for charging through the receiving converter.

2. The wireless charging system of claim 1, wherein: the terminal also comprises a power management system, and the wireless charger wakes up the power management system in the terminal and charges the terminal according to the position relation between the wireless charger and the terminal.

3. The wireless charging system of claim 1, wherein: the receiving coil comprises a first coil and a second coil;

wherein the content of the first and second substances,

the first coil is used for inducing the change of the coupling degree between the first coil and the transmitting coil so as to judge the relative position relationship between the wireless charger and the terminal;

the second coil converts direct current to charge the battery through a receiving converter.

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