CN112039228A - Charging circuit of electronic device and charging method of electronic device - Google Patents
Charging circuit of electronic device and charging method of electronic device Download PDFInfo
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- CN112039228A CN112039228A CN202010898853.7A CN202010898853A CN112039228A CN 112039228 A CN112039228 A CN 112039228A CN 202010898853 A CN202010898853 A CN 202010898853A CN 112039228 A CN112039228 A CN 112039228A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
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- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses a charging circuit of electronic equipment and a charging method of the electronic equipment, and belongs to the technical field of mobile communication. The charging circuit of the electronic device includes: the switch is respectively connected with the coil, the capacitance detection module, the wireless charging module and the micro control unit; the receiving coil is respectively connected with the capacitance detection module and the wireless charging module; the micro control unit is used for controlling the switch so as to enable the coil to be connected into the capacitance detection module or enable the coil to be connected into the wireless charging module; the capacitance detection module obtains the capacitance change rate between the coil and the ground, the electronic equipment reduces the electromagnetic wave absorption ratio, and the micro control unit controls the coil to be connected to the wireless charging module so as to charge the battery through electromagnetic induction between the coil and the wireless charging device. According to the embodiment of the application, the problems that in the related art, polar plates of a wireless charging coil and a SAR sensor are respectively and independently arranged, the occupied size is large, the whole size of the electronic equipment is large, and the whole cost is high can be solved.
Description
Technical Field
The application belongs to the technical field of mobile communication, and particularly relates to a charging circuit of electronic equipment and a charging method of the electronic equipment.
Background
With the development of wireless charging technology, the application of wireless charging to electronic devices is also becoming more and more extensive. Meanwhile, the electronic device needs to transmit radio waves to the base station during communication with the base station. When the power of the radio waves transmitted by the electronic equipment to the base station exceeds a certain intensity, the health of the human body is affected. Therefore, a Specific Absorption Rate (SAR) sensor needs to be installed in the electronic device.
In the related art, the electronic device includes a wireless charging module and a SAR sensor. Wherein, wireless charging module includes wireless charging coil. After the wireless charging coil generates electromagnetic induction with the wireless charging seat, current is generated to charge the electronic equipment. The SAR sensor includes a pad, and determines a distance between an object or person and the electronic device by detecting a voltage difference between the pad and ground. And when the distance reaches a certain condition, performing SAR reduction treatment.
In the course of implementing the present application, the inventors found that there are at least the following problems in the related art: the polar plates of the wireless charging coil and the SAR sensor are respectively and independently arranged, so that the occupied size is large, and the whole size and the whole cost of the electronic equipment are high.
Disclosure of Invention
The purpose of the embodiment of the application is to provide a charging circuit of an electronic device and a charging method of the electronic device, which can solve the problems that in the related art, polar plates of a wireless charging coil and an SAR sensor are respectively and independently arranged, the occupied size is large, the whole size of the electronic device is large, and the whole cost is high.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a charging circuit for an electronic device, including: the device comprises a coil, a switch, a capacitance detection module, a wireless charging module and a micro control unit;
the switch is respectively connected with the coil, the capacitance detection module, the wireless charging module and the micro control unit;
the receiving coil is respectively connected with the capacitance detection module and the wireless charging module;
the micro control unit is used for controlling the switch so as to enable the coil to be connected into the capacitance detection module or enable the coil to be connected into the wireless charging module;
under the condition that the coil is connected into the capacitance detection module, the capacitance detection module acquires the capacitance change rate between the coil and the ground, under the condition that the capacitance change rate meets the preset condition, the electronic equipment reduces the electromagnetic wave absorption ratio, and the micro control unit controls the coil to be connected into the wireless charging module so as to charge the battery through electromagnetic induction between the coil and the wireless charging device.
In a second aspect, an embodiment of the present application provides a charging method for an electronic device, where the charging method is applied to the charging circuit of the first aspect, and the method includes:
the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module or enable the coil to be connected into the wireless charging module;
under the condition that the coil is connected into the capacitance detection module, the capacitance change rate between the coil and the ground is obtained, under the condition that the capacitance change rate meets the preset condition, the electromagnetic wave absorption ratio is reduced, and the coil is controlled to be connected into the wireless charging module so as to charge the battery through electromagnetic induction between the coil and the wireless charging device.
The charging circuit of the electronic equipment in the embodiment of the application comprises a coil, a switch, a capacitance detection module, a wireless charging module and a micro control unit; wherein, little the control unit can control the switch to make the coil insert electric capacity detection module or make the coil insert wireless charging module. After the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module, the capacitance detection module detects the change rate between the coil and the ground, and then whether SAR reduction is needed or not is determined. And after reducing the SAR, the micro control unit controls the switch to enable the coil to be connected with the wireless charging module, at the moment, the capacitance detection module stops detecting the capacitance change rate between the coil and the ground, and the micro control unit controls the wireless charging module to establish communication connection with the wireless charging seat, so that after the coil can generate electromagnetic induction with the wireless charging seat, the wireless charging module can charge the electronic equipment. Therefore, the micro control unit can control the time division multiplexing of the coil, so that the coil can be used as a polar plate in the SAR sensor and can also be used as an electromagnetic induction coil in a wireless charging process, therefore, the SAR sensor polar plate and the wireless charging coil do not need to be independently arranged in the charging circuit of the electronic equipment, and compared with the charging circuit of the electronic equipment in the related technology, the size of the charging circuit of the electronic equipment is reduced, and further the whole size and the whole cost of the electronic equipment comprising the charging circuit of the electronic equipment are reduced.
Drawings
Fig. 1 is a schematic structural diagram of a SAR sensor provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a coil provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a charging circuit of an electronic device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a charging circuit of another electronic device according to an embodiment of the present disclosure;
fig. 5 is a schematic flowchart of a charging method of an electronic device according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
At present, with the development of wireless charging technology, the application of wireless charging to electronic devices is also more and more extensive. Meanwhile, the electronic device needs to transmit radio waves to the base station during communication with the base station. When the power of the radio waves transmitted by the electronic equipment to the base station exceeds a certain intensity, the health of the human body is affected. Therefore, a Specific Absorption Rate (SAR) sensor needs to be installed in the electronic device.
In the related art, the electronic device includes a wireless charging module and a SAR sensor. Wherein, wireless charging module includes the coil. After the coil generates electromagnetic induction with the wireless charging seat, current is generated to charge the electronic equipment. As shown in fig. 1, the SAR sensor 100 is composed of a metal plate 101 and a SAR sensor function module 102. The SAR sensor 100 determines the distance between an object or person and an electronic device by detecting a voltage difference between the metal plate 101 and the ground. And when the distance reaches a certain condition, performing SAR reduction treatment.
In the course of implementing the present application, the inventors found that there are at least the following problems in the related art: the polar plates of the wireless charging coil and the SAR sensor are respectively and independently arranged, so that the occupied size is large, and the whole size and the whole cost of the electronic equipment are high.
In order to solve the above problem, embodiments of the present application provide a charging circuit of an electronic device and a charging method of the electronic device. Before describing the charging circuit of the electronic device provided in the embodiment of the present application in detail, the coil provided in the embodiment of the present application is first described in detail.
Fig. 2 is a schematic structural diagram of a coil 200 according to an embodiment of the present application. Because the polar plates of wireless charging coil and SAR sensor set up independently respectively, it is great to occupy the volume, leads to that electronic equipment's whole volume is great and whole cost is also high. The coil 200 is formed by winding a metal wire and has a certain metal area. Meanwhile, the coil 200 can also generate electromagnetic induction with other coils. Therefore, the coil 200 is used as a polar plate of the SAR sensor, and the coil 200 is also used as a charging coil for wireless charging. Through the time-sharing control of the micro-control unit on the capacitance detection module and the wireless charging module, the coil 200 can be time-sharing multiplexed.
Therefore, the coil provided by the embodiment of the application can serve as a polar plate of the SAR sensor and also can serve as a wireless charging coil to generate electromagnetic induction and charge electronic equipment.
The charging circuit of the electronic device according to the embodiments of the present application is described in detail with reference to the accompanying drawings.
Fig. 3 is a schematic structural diagram of a charging circuit of an electronic device according to an embodiment of the present disclosure.
As shown in fig. 3, a charging circuit of an electronic device provided in an embodiment of the present application may include: a coil 301, a switch 302, a capacitance detection module 303, a wireless charging module 304 and a micro control unit 305.
The switch 302 is connected to the coil 301, the capacitance detection module 303, and the wireless charging module 304, respectively. The coil 301 is connected to the capacitance detection module 303 and the wireless charging module 304, respectively.
And the micro control unit 305 is used for controlling the switch 302 to enable the coil 301 to be connected to the capacitance detection module 303 or enable the coil 301 to be connected to the wireless charging module 304.
Wherein, under the condition that coil 301 inserts electric capacity detection module 303, electric capacity detection module 303 detects the electric capacity rate of change between coil 301 and the ground, and under the condition that electric capacity rate of change satisfies preset condition, electronic equipment reduces electromagnetic wave absorption ratio SAR, and little the control unit 305 control coil 301 inserts wireless charging module simultaneously. At this time, the capacitance detection module stops detecting the rate of change of capacitance between the coil and ground. The mcu 305 controls the wireless charging module 304 to establish a communication connection with the wireless charging cradle 307, so that the wireless charging module 304 charges the electronic device through electromagnetic induction between the coil and the wireless charging cradle 307.
As shown in fig. 3, when the micro control unit 305 controls the switch 301 to switch the coil 301 into the capacitance detection module 303, the micro control unit 305, the capacitance detection module 303, the switch 302, and the coil 301 can form a capacitance detection circuit. And the capacitance detection module 303 and the coil 301 are combined to be equivalent to an SAR sensor.
In the case where the coil 301 is switched into the capacitance detection module 303, the capacitance detection module 303 can detect the rate of change between the coil 301 and ground.
The coil 301 and ground may be considered a capacitor and the space between the coil 301 and ground may be considered a capacitive medium. When a person or an object approaches the electronic device, the dielectric constant of the capacitor changes due to the change of the dielectric of the capacitor, and the capacitor also changes. Therefore, the micro control unit 305 controls the capacitance detection module 303 to detect the rate of change of capacitance between the coil 301 and the ground to determine whether a person or an object is approaching the electronic device.
The micro-control unit 305 controls the switch 302 to switch the coil 301 into the capacitance detection module 303 under two conditions, and the capacitance detection module 303 detects the capacitance change rate between the coil 301 and the ground.
First, in the process of transmitting radio waves to the base station by the electronic device, the power of the transmitted radio waves may exceed a certain intensity, and thus radiation is generated to the human body. Therefore, the micro control unit 305 needs to control the switch 302 in real time, so that the coil 301 is connected to the capacitance detection module 303, and the capacitance detection module 303 detects the capacitance change rate between the coil 301 and the ground. In this case, the preset condition may be a capacitance change rate when a person approaches the electronic device.
Second, before the electronic device is wirelessly charged, the electronic device is wirelessly charged by the wireless charging cradle 307. Therefore, when the electronic device is wirelessly charged, metal is close to the electronic device. When the electronic device is charged wirelessly, people are bound to approach the electronic device, and SAR needs to be reduced. At this time, the preset condition may be a capacitance change rate when the metal approaches the electronic device. Therefore, the micro control unit 305 controls the capacitance change rate between the coil 301 and the ground detected by the capacitance detection module 303 in real time.
Specifically, the micro control unit 305 sends a first control signal to the capacitance detection module 303, and after the capacitance detection module 303 receives the first control signal, the capacitance change rate between the coil 301 and the ground is detected. After the capacitance detection module 303 detects the capacitance change rate, the capacitance change rate is sent to the micro control unit 305. The mcu 305 determines whether the rate of change of the capacitance satisfies a predetermined condition. When the rate of change in capacitance between the coil 301 and ground satisfies a preset condition, SAR is reduced.
As shown in fig. 3, the micro control unit 305, the wireless charging module 304 and the coil 301 can form a wireless charging loop.
After reducing SAR, the micro control unit 305 sends a second control signal to the capacitance detection module 303. The control capacitance detection module 303 stops the rate of change of capacitance between the detection coil 301 and ground after receiving the second control signal. Meanwhile, a third control signal is transmitted to the wireless charging module 304. After receiving the third control signal, the wireless charging module 304 establishes a communication connection with the wireless charging cradle 307. When the communication connection between the wireless charging module 304 and the wireless charging dock 307 is successfully established, the coil 301 and the transmitting coil in the wireless charging dock 307 generate electromagnetic induction, thereby generating current. The coil 301 transmits the current to the wireless charging module 304. The wireless charging module 304 rectifies the current and performs voltage processing, and then charges the electronic device. In the process of charging the electronic device, the wireless charging module 301 transmits the charging current to the charging management module 308, and the charging management module 308 adjusts the charging current and the charging voltage and then charges the battery 306.
Therefore, the charging circuit of the electronic device in the embodiment of the application comprises a coil, a switch, a capacitance detection module, a wireless charging module and a micro control unit; wherein, little the control unit can control the switch to make the coil insert electric capacity detection module or make the coil insert wireless charging module. After the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module, the capacitance detection module detects the change rate between the coil and the ground, and then whether SAR reduction is needed or not is determined. And after reducing the SAR, the micro control unit controls the switch to enable the coil to be connected with the wireless charging module, at the moment, the capacitance detection module stops detecting the capacitance change rate between the coil and the ground, and the micro control unit controls the wireless charging module to establish communication connection with the wireless charging seat, so that after the coil can generate electromagnetic induction with the wireless charging seat, the wireless charging module can charge the electronic equipment. Therefore, the micro control unit can control the time division multiplexing of the coil, so that the coil can be used as a polar plate in the SAR sensor and can also be used as an electromagnetic induction coil in a wireless charging process, therefore, the SAR sensor polar plate and the wireless charging coil do not need to be independently arranged in the charging circuit of the electronic equipment, and compared with the charging circuit of the electronic equipment in the related technology, the size of the charging circuit of the electronic equipment is reduced, and further the whole size and the whole cost of the electronic equipment comprising the charging circuit of the electronic equipment are reduced.
Optionally, in an embodiment of the present application, the coil 301 is connected to the wireless charging module 304, but the wireless charging module 304 and the wireless charging cradle 307 fail to establish a communication connection, at this time, the micro control unit 305 controls the switch 302, so that the coil is connected to the capacitance detection module 303, and the micro control unit 305 may further send a first control signal to the capacitance detection module 303. After receiving the first control signal, the capacitance detection module 303 detects the capacitance change rate between the coil 301 and the ground again.
Optionally, in an embodiment of the present application, during the wireless charging of the electronic device, the temperature of the coil 301 needs to be detected, so as to prevent that, during the wireless charging of the electronic device, the performance of the mobile phone is affected and a dangerous event occurs due to an excessively high temperature of the coil 301.
Specifically, when the coil 301 is connected to the wireless charging module 304 and the wireless charging module and the charging stand are successfully connected, the mcu 305 sends a fourth control signal to the capacitance detecting module 303. The capacitance detection module 303 detects the first capacitance value between the coil 301 and the ground after receiving the fourth control signal, and the capacitance detection module 303 sends the first capacitance value between the coil and the ground to the micro control unit 305. After receiving the first capacitance value, the mcu 305 sends a fifth control signal to the wireless charging module 304. After receiving the fifth control signal, the wireless charging module 304 charges the electronic device through electromagnetic induction between the coil 301 and the wireless charging dock 307. In the process of charging the electronic device, the wireless charging module 301 transmits the charging current to the charging management module 308, and the charging management module 308 adjusts the charging current and the charging voltage and then charges the battery 306.
In the wireless charging process of the electronic device, the temperature of the coil 301 increases along with the increase of time, so that certain potential safety hazards exist in the wireless charging process of the electronic device. In order to improve the safety of the electronic device during the wireless charging process, the temperature of the coil 301 needs to be detected.
Specifically, the micro control unit 305 sends a sixth control signal to the wireless charging module 304 every preset time period. After receiving the sixth control signal, the wireless charging module 304 stops charging the electronic device through electromagnetic induction between the coil 301 and the wireless charging dock 307. Meanwhile, the mcu 305 sends a fourth control signal to the capacitance detecting module 303. After receiving the fourth control signal, the capacitance detection module 303 detects a second capacitance value between the coil 301 and the ground, and sends the second capacitance value to the micro control unit 305. After receiving the second capacitance value, the micro control unit 305 determines the current first temperature of the coil 301 according to the first capacitance value and the second capacitance value. When the first temperature is greater than the first preset temperature threshold, the mcu 305 sends a fifth control signal to the wireless charging module 304. After receiving the fifth control signal, the wireless charging module 304 charges the electronic device through electromagnetic induction between the coil and the wireless charging dock 307. Meanwhile, the micro control unit can reduce the charging power of the electronic equipment during wireless charging.
Therefore, the situation that the performance of the mobile phone is influenced and dangerous events are caused due to the fact that the temperature of the coil is too high in the wireless charging process of the electronic equipment is prevented.
Optionally, in an embodiment of the present application, in order to prevent a situation that a foreign object such as a metal may exist between the electronic device and the wireless charging dock 307 during the wireless charging of the electronic device, and further cause a rapid temperature rise of the coil, after the charging power of the electronic device during the wireless charging is reduced, the micro control unit 305 controls the switch 302 to enable the coil 301 to be connected to the capacitance detection module 303, and sends a fourth control signal to the capacitance detection module 303. After receiving the fourth control signal, the capacitance detection module 303 detects a third capacitance value between the coil 301 and the ground, and sends the third capacitance value to the micro control unit 305. After receiving the third capacitance value, the micro control unit 305 determines a second temperature of the coil 301 according to the first capacitance value and the third capacitance value. When the second temperature is higher than the second preset temperature threshold, the micro control unit 305 controls the switch 302 and sends a sixth control signal to the wireless charging module, and after receiving the sixth control signal, the wireless charging module 304 stops charging the electronic device through electromagnetic induction between the coil 301 and the wireless charging dock 307.
This can prevent a situation in which foreign matter such as metal may exist between the electronic device and the wireless charging stand 307 and the coil is rapidly heated during wireless charging of the electronic device.
Optionally, in an embodiment of the present application, when the second temperature of the coil 301 exceeds the second temperature threshold, the micro control unit 305 further generates a prompt message for prompting the user that the current wireless charging process is dangerous.
Therefore, the user can find potential dangers of the electronic equipment in the wireless charging process in time, and the safety of the electronic equipment in the wireless charging process is guaranteed.
In the above embodiment, the micro control unit 305 controls the switch 302 to switch the coil into the capacitance detection module 303 or the wireless charging module 304, and the process of the micro control unit 305 controlling the switch 302 will be described in detail below.
Optionally, in an embodiment of the present application, as shown in fig. 4, a switch 302 in a charging circuit of an electronic device provided in an embodiment of the present application includes a first connection terminal 1, a second connection terminal 2, a third connection terminal 3, and a fourth connection terminal 3.
The microcontroller unit 305 is connected to the coil via a first connection 1 and a fourth connection 3. The capacitance detection module 303 is connected to the coil 301 via a second connection. The wireless charging module 304 is connected to the coil 301 through the third connection terminal 3. The switch 302 further comprises a fifth connection 5. Wherein the coil 301 is further connected to the switch 302 via a fifth connection 5.
The switch of the switch 302 switches by default to the second connection 2. The capacitance detection module 303 detects the rate of change of capacitance between the coil 301 and ground. After the capacitance detection module 303 detects the capacitance change rate, the capacitance change rate is sent to the micro control unit 305. The mcu 305 determines whether the rate of change of the capacitance satisfies a predetermined condition. When the rate of change in capacitance between the coil 301 and ground satisfies a preset condition, SAR is reduced.
After reducing SAR, the micro control unit 305 sends a first switching signal to the switch 302. After receiving the first switching signal, the switch 305 switches the switch to the third connection terminal 3, so that the wireless charging module 304 is connected to the coil 301. The wireless charging module 304 establishes a communication connection with the wireless charging cradle 307. When the communication connection between the wireless charging module 304 and the wireless charging dock 307 is successfully established, the coil 301 and the transmitting coil in the wireless charging dock 307 generate electromagnetic induction, thereby generating current. The coil 301 transmits the current to the wireless charging module 304. The wireless charging module 304 rectifies the current and performs voltage processing, and then charges the electronic device. In the process of charging the electronic device, the wireless charging module 301 transmits the charging current to the charging management module 308, and the charging management module 308 adjusts the charging current and the charging voltage and then charges the battery 306.
Therefore, the coil can serve as a polar plate of the capacitance detection module in the process of detecting the change rate of capacitance and also can serve as an electromagnetic induction coil in the wireless charging process, so that the overall size and the overall cost of the electronic equipment are reduced.
Optionally, in an embodiment of the present application, in case that the wireless charging module 304 and the wireless charging cradle 307 fail to establish the communication connection, the mcu 305 further sends a second switching signal to the switch 302. After receiving the second switching signal, the switch 302 switches the switch to the second connection 2. The capacitance detection module 303 re-detects the rate of change of capacitance between the coil 301 and ground.
Optionally, in an embodiment of the present application, during the wireless charging of the electronic device, the temperature of the coil needs to be detected, so as to prevent that, during the wireless charging of the electronic device, the performance of the mobile phone is affected and a dangerous event occurs due to an excessively high temperature of the coil.
Specifically, in the case where the wireless charging module successfully establishes a communication connection with the wireless charging cradle 307, the micro control unit 305 sends a second switching signal to the switch 302. After receiving the second switching signal, the switch 302 switches the switch to the second connection 2. The capacitance detection module 303 detects a first capacitance value between the coil 301 and ground, and the capacitance detection module 303 sends the first capacitance value between the coil 301 and ground to the micro control unit 305. After the micro control unit 305 receives the first capacitance value, the micro control unit 305 sends a first switching signal to the switch 302. After receiving the first switching signal, the switch 305 switches the switch to the third connection terminal 3, so that the wireless charging module 304 is connected to the coil 301. Next, the wireless charging module 304 charges the electronic device through electromagnetic induction between the coil and the wireless charging dock 307. The wireless charging module 301 transmits the charging current to the charging management module 308, and the charging management module 308 adjusts the charging current and the charging voltage and then charges the battery.
During the wireless charging process of the electronic device, the temperature of the coil 301 may increase with time, and the increase in the temperature of the coil may cause a safety problem. In order to ensure the safety of the electronic device during the wireless charging process, the capacitance detection module 303 needs to detect the second capacitance value between the coil 301 and the ground every preset time period, so as to determine whether the temperature change of the coil 301 causes a safety problem. Wherein the preset time period may be 10 minutes. In order to ensure the safety of the wireless charging process, the preset time can be shortened to 5 minutes and the like.
Specifically, the micro control unit 305 sends a second switching signal to the switch 302 every preset time period. After receiving the second switching signal, the switch 302 switches the switch to the second connection 2. Next, the capacitance detection module 303 detects a second capacitance value between the coil 301 and ground and sends the second capacitance value to the micro control unit 305. After receiving the second capacitance value, the micro control unit 305 determines the current first temperature of the coil 301 according to the first capacitance value and the second capacitance value. When the first temperature is greater than the first preset temperature threshold, the mcu 305 sends a first switching signal to the switch 302. After receiving the first switching signal, the switch 302 switches the switch to the third connection terminal 3, so that the wireless charging module 304 is connected to the coil 301. Next, the wireless charging module 304 charges the electronic device through electromagnetic induction between the coil and the wireless charging dock 307. At the same time, the mcu 305 reduces the charging power for wireless charging of the electronic device.
Therefore, the situation that the performance of the mobile phone is influenced and dangerous events are caused due to the fact that the temperature of the coil is too high in the wireless charging process of the electronic equipment is prevented.
Optionally, in an embodiment of the present application, in order to prevent a situation that a foreign object such as a metal may exist between the electronic device and the wireless charging dock 307 during the wireless charging of the electronic device, and further cause the coil 301 to rapidly increase in temperature, the micro control unit 305 needs to send the second switching signal to the switch 302 after reducing the charging power during the wireless charging of the electronic device. After receiving the second switching signal, the switch 302 switches the switch to the second connection 2. Next, the capacitance detection module 303 detects a third capacitance value between the coil 301 and ground and sends the third capacitance value to the micro control unit 305. After receiving the third capacitance value, the micro control unit 305 determines a second temperature of the coil 301 according to the first capacitance value and the third capacitance value. When the second temperature is higher than the second preset temperature threshold, the mcu 305 no longer switches the switch of the switch 302 to the third connection terminal 3, so that the wireless charging module 304 stops charging the electronic device through electromagnetic induction between the coil 301 and the wireless charging dock 307.
Therefore, the situation that foreign matters such as metal exist between the electronic equipment and the wireless charging seat and further the coil is rapidly heated can be avoided in the process of wirelessly charging the electronic equipment.
The charging circuit of the electronic equipment provided by the embodiment of the application comprises a coil, a switch, a capacitance detection module, a wireless charging module and a micro control unit; wherein, little the control unit can control the switch to make the coil insert electric capacity detection module or make the coil insert wireless charging module. After the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module, the capacitance detection module detects the change rate between the coil and the ground, and then whether SAR reduction is needed or not is determined. And after reducing the SAR, the micro control unit controls the switch to enable the coil to be connected with the wireless charging module, at the moment, the capacitance detection module stops detecting the capacitance change rate between the coil and the ground, and the micro control unit controls the wireless charging module to establish communication connection with the wireless charging seat, so that after the coil can generate electromagnetic induction with the wireless charging seat, the wireless charging module can charge the electronic equipment. Therefore, the micro control unit can control the time division multiplexing of the coil, so that the coil can be used as a polar plate in the SAR sensor and can also be used as an electromagnetic induction coil in a wireless charging process, therefore, the SAR sensor polar plate and the wireless charging coil do not need to be independently arranged in the charging circuit of the electronic equipment, and compared with the charging circuit of the electronic equipment in the related technology, the size of the charging circuit of the electronic equipment is reduced, and further the whole size and the whole cost of the electronic equipment comprising the charging circuit of the electronic equipment are reduced.
Based on the charging circuit of the electronic equipment provided by the embodiment of the application, correspondingly, the embodiment of the application provides a charging method of the electronic equipment. The following describes in detail a charging method for an electronic device provided in an embodiment of the present application.
Fig. 5 is a flowchart illustrating a charging method 500 of an electronic device according to the present disclosure.
As shown in fig. 5, a charging method 500 of an electronic device provided by the present application may include:
s501: the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module or enable the coil to be connected into the wireless charging module.
S502: and under the condition that the coil is connected into the capacitance detection module, acquiring the capacitance change rate between the coil and the ground.
S503: and reducing the electromagnetic wave absorption ratio under the condition that the capacitance change rate meets the preset condition.
S504: the control coil is connected to the wireless charging module to charge the battery through electromagnetic induction between the coil and the wireless charging device.
Optionally, in an embodiment of the present application, in a case that the coil is connected to the wireless charging module, and the wireless charging module fails to establish a communication connection with the wireless charging cradle, the method 500 further includes:
and the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module so as to obtain the capacitance change rate between the coil and the ground.
Optionally, in an embodiment of the present application, in a case that the coil is connected to the wireless charging module, and the wireless charging module and the wireless charging cradle establish a communication connection successfully, the method 500 further includes:
the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module and obtain a first capacitance value between the coil and the ground;
after the capacitance detection module detects a first capacitance value between the coil and the ground, the micro control unit controls the switch to enable the coil to be connected to the wireless charging module so as to charge the electronic equipment through electromagnetic induction between the coil and the wireless charging seat.
Optionally, in an embodiment of the present application, during the charging process, the method 500 further includes: and the micro control unit controls the switch to enable the coil to be connected to the capacitance detection module every preset time length so as to obtain a second capacitance value between the coil and the ground, determines a first temperature value of the coil according to the first capacitance value and the second capacitance value, and reduces the charging power of wireless charging under the condition that the first temperature value is greater than or equal to a first preset temperature threshold value.
Optionally, in an embodiment of the present application, after reducing the charging power of the wireless charging, the method 500 further includes:
the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module so as to obtain a third capacitance value between the coil and the ground;
the micro control unit determines a second temperature of the coil according to the first capacitance value and the third capacitance value, and controls the wireless charging module to stop charging the battery under the condition that the second temperature is greater than or equal to a second preset temperature threshold value, wherein the second preset temperature threshold value is greater than the first preset temperature threshold value.
Optionally, in an embodiment of the present application, the switch includes a first connection end, a second connection end, a third connection end, a fourth connection end, and a movable arm, and the method 500 further includes:
the micro control unit controls the movable arm to be connected with the capacitance detection module or the wireless charging module in a switchable manner, so that the coil is connected into the capacitance detection module or the coil is connected into the wireless charging module.
Therefore, the micro control unit can control the switch to enable the coil to be connected into the capacitance detection module or enable the coil to be connected into the wireless charging module. After the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module, the capacitance detection module detects the change rate between the coil and the ground, and then whether SAR reduction is needed or not is determined. And after reducing the SAR, the micro control unit controls the switch to enable the coil to be connected with the wireless charging module, at the moment, the capacitance detection module stops detecting the capacitance change rate between the coil and the ground, and the micro control unit controls the wireless charging module to establish communication connection with the wireless charging seat, so that after the coil can generate electromagnetic induction with the wireless charging seat, the wireless charging module can charge the electronic equipment. Therefore, the micro control unit can control the time division multiplexing of the coil, so that the coil can be used as a polar plate in the SAR sensor and can also be used as an electromagnetic induction coil in a wireless charging process, therefore, the SAR sensor polar plate and the wireless charging coil do not need to be independently arranged in the charging circuit of the electronic equipment, and compared with the charging circuit of the electronic equipment in the related technology, the size of the charging circuit of the electronic equipment is reduced, and further the whole size and the whole cost of the electronic equipment comprising the charging circuit of the electronic equipment are reduced.
The charging method of the electronic device provided by the embodiment of the application can be applied to the charging circuit of the electronic device shown in fig. 3, and can achieve the technical effects of reducing the volume of the charging circuit of the electronic device, and further reducing the overall volume and overall cost of the electronic device including the charging circuit of the electronic device, and for brevity, detailed descriptions are omitted here.
It should be noted that, in this document, 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 only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A charging circuit for an electronic device, comprising: the device comprises a coil, a switch, a capacitance detection module, a wireless charging module and a micro control unit;
the switch is respectively connected with the coil, the capacitance detection module, the wireless charging module and the micro control unit;
the coil is respectively connected with the capacitance detection module and the wireless charging module;
the micro control unit is used for controlling the switch so as to enable the coil to be connected into the capacitance detection module or enable the coil to be connected into the wireless charging module;
under the condition that the coil is connected to the capacitance detection module, the capacitance detection module acquires the capacitance change rate between the coil and the ground, under the condition that the capacitance change rate meets a preset condition, the electronic equipment reduces the electromagnetic wave absorption ratio, and the micro control unit controls the coil to be connected to the wireless charging module so as to charge a battery through electromagnetic induction between the coil and the wireless charging device.
2. The charging circuit according to claim 1, wherein in case that the coil is connected to the wireless charging module and the wireless charging module fails to establish a communication connection with a wireless charging cradle, the micro control unit controls the switch to connect the coil to the capacitance detection module to obtain a capacitance change rate between the coil and ground.
3. The charging circuit according to claim 1, wherein when the coil is connected to the wireless charging module and the wireless charging module is successfully connected to the wireless charging cradle, the micro control unit controls the switch to connect the coil to the capacitance detection module and obtain a first capacitance between the coil and ground;
after the capacitance detection module acquires the first capacitance value, the micro control unit controls the switch to enable the coil to be connected to the wireless charging module, so that the battery is charged through electromagnetic induction between the coil and the wireless charging seat.
4. The charging circuit according to claim 3, wherein in the charging process, every preset time interval, the micro control unit controls the switch to enable the coil to be connected to the capacitance detection module to obtain a second capacitance value between the coil and the ground, determines a first temperature value of the coil according to the first capacitance value and the second capacitance value, and reduces the charging power of wireless charging when the first temperature value is greater than or equal to a first preset temperature threshold.
5. The charging circuit according to claim 4, wherein after the charging power of the wireless charging is reduced, the micro control unit controls the switch to connect the coil to the capacitance detection module to obtain a third capacitance value between the coil and the ground;
the micro control unit determines a second temperature of the coil according to the first capacitance value and the third capacitance value, and controls the wireless charging module to stop charging the battery when the second temperature is greater than or equal to a second preset temperature threshold value, wherein the second preset temperature threshold value is greater than the first preset temperature threshold value.
6. The charging circuit according to any one of claims 1 to 5, wherein the switch comprises a first connection end, a second connection end, a third connection end and a movable arm, and the first connection end and the second connection end are respectively connected to two ends of the coil; the third connecting end is respectively connected with the capacitance detection module and the wireless charging module through the micro control unit; the movable arm is switchably connected with the capacitance detection module or the wireless charging module under the control of the micro control unit, so that the coil is connected into the capacitance detection module or the coil is connected into the wireless charging module.
7. A charging method for an electronic device, the charging method being applied to the charging circuit according to any one of claims 1 to 6, the method comprising:
the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module or enable the coil to be connected into the wireless charging module;
under the condition that the coil is connected to the capacitance detection module, acquiring the capacitance change rate between the coil and the ground, reducing the electromagnetic wave absorption ratio under the condition that the capacitance change rate meets the preset condition, and controlling the coil to be connected to the wireless charging module so as to charge the battery through electromagnetic induction between the coil and the wireless charging device.
8. The method of claim 7, wherein if the coil is connected to the wireless charging module and the wireless charging module fails to establish a communication connection with a wireless charging cradle, the method further comprises:
and the micro control unit controls the switch to enable the coil to be connected into the capacitance detection module so as to obtain the capacitance change rate between the coil and the ground.
9. The method of claim 7, wherein if the coil is connected to the wireless charging module and the wireless charging cradle establish a communication connection successfully, the method further comprises:
the micro control unit controls the switch to enable the coil to be connected to the capacitance detection module, and a first capacitance value between the coil and the ground is obtained;
after the capacitance detection module detects a first capacitance value between the coil and the ground, the micro control unit controls the switch to enable the coil to be connected to the wireless charging module so as to charge the electronic equipment through electromagnetic induction between the coil and a wireless charging seat.
10. The method of claim 9, wherein during the charging process, the method further comprises: and the micro control unit controls the switch to enable the coil to be connected to the capacitance detection module every preset time length so as to obtain a second capacitance value between the coil and the ground, determines a first temperature value of the coil according to the first capacitance value and the second capacitance value, and reduces the charging power of wireless charging under the condition that the first temperature value is greater than or equal to a first preset temperature threshold value.
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| CN202010898853.7A CN112039228A (en) | 2020-08-31 | 2020-08-31 | Charging circuit of electronic device and charging method of electronic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021169729A1 (en) * | 2020-02-27 | 2021-09-02 | 维沃移动通信有限公司 | Circuit control apparatus and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576781A (en) * | 2015-07-28 | 2016-05-11 | 宇龙计算机通信科技(深圳)有限公司 | Charging control method, terminal, charging base and charging system |
| CN107124046A (en) * | 2017-06-27 | 2017-09-01 | 青岛鲁渝能源科技有限公司 | Wireless charging system and wireless charging method with In vivo detection function |
| CN107431388A (en) * | 2015-04-10 | 2017-12-01 | 高通股份有限公司 | The method and apparatus existed with use pattern detection are realized in wireless charging application |
| CN107579754A (en) * | 2017-09-15 | 2018-01-12 | 联想(北京)有限公司 | Communication terminal and its control method |
| CN107864690A (en) * | 2015-06-26 | 2018-03-30 | 英特尔公司 | The peak coil current of device-dependent |
| US20190156995A1 (en) * | 2017-11-21 | 2019-05-23 | Tdk Taiwan Corp. | Wireless system and wireless device |
-
2020
- 2020-08-31 CN CN202010898853.7A patent/CN112039228A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107431388A (en) * | 2015-04-10 | 2017-12-01 | 高通股份有限公司 | The method and apparatus existed with use pattern detection are realized in wireless charging application |
| CN107864690A (en) * | 2015-06-26 | 2018-03-30 | 英特尔公司 | The peak coil current of device-dependent |
| CN105576781A (en) * | 2015-07-28 | 2016-05-11 | 宇龙计算机通信科技(深圳)有限公司 | Charging control method, terminal, charging base and charging system |
| CN107124046A (en) * | 2017-06-27 | 2017-09-01 | 青岛鲁渝能源科技有限公司 | Wireless charging system and wireless charging method with In vivo detection function |
| CN107579754A (en) * | 2017-09-15 | 2018-01-12 | 联想(北京)有限公司 | Communication terminal and its control method |
| US20190156995A1 (en) * | 2017-11-21 | 2019-05-23 | Tdk Taiwan Corp. | Wireless system and wireless device |
Non-Patent Citations (2)
| Title |
|---|
| 殷埝生等: "电容器的温度系数", 《电工电子实训教程》 * |
| 魏玲等: "《新能源汽车技术与应用》", 30 September 2018, 《北京：冶金工业出版社》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021169729A1 (en) * | 2020-02-27 | 2021-09-02 | 维沃移动通信有限公司 | Circuit control apparatus and method |
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