CN114844152A - Wireless charger with annular breathing lamp effect - Google Patents

Wireless charger with annular breathing lamp effect Download PDF

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Publication number
CN114844152A
CN114844152A CN202210505234.6A CN202210505234A CN114844152A CN 114844152 A CN114844152 A CN 114844152A CN 202210505234 A CN202210505234 A CN 202210505234A CN 114844152 A CN114844152 A CN 114844152A
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China
Prior art keywords
circuit
breathing lamp
main control
annular breathing
resistor
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CN202210505234.6A
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Chinese (zh)
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CN114844152B (en
Inventor
胡宪权
赵智星
詹海峰
谢峰
欧炜昌
万威
肖倩
何华兵
夏松松
刘刚
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Hunan Giantsun Power Electronics Co Ltd
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Hunan Giantsun Power Electronics Co Ltd
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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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • 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
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • 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
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Engineering & Computer Science (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a wireless charger with an annular breathing lamp effect, which comprises: the LED annular breathing lamp comprises a first circuit, a main control circuit, an LC resonance circuit and a coil; the input end of the first circuit is connected with an external direct-current power supply, the output end of the first circuit is electrically connected with the input end of the main control circuit, the output end of the main control circuit is electrically connected with the input end of the LC resonance circuit, the output end of the LC resonance circuit is connected with the transmitting coil, and the mobile equipment is wirelessly charged through the transmitting coil; the LED annular breathing lamp is electrically connected with the main control circuit. According to the invention, the LED annular breathing lamp reflects the state of the wireless charger in real time when the mobile equipment is charged, the main control circuit has strong functions, the flexibility in the control application of the wireless power supply can be increased to the maximum extent, and the functions of input undervoltage protection, overcurrent protection, short-circuit protection, over-temperature protection and foreign matter detection are provided.

Description

Wireless charger with annular breathing lamp effect
Technical Field
The invention relates to the technical field of wireless chargers, in particular to a wireless charger with an annular breathing lamp effect.
Background
At present, with the increasing maturity of radio technologies, the types of radio products in the market are also gradually increasing, and wireless chargers are developed towards diversification and specialization on basic functions, such as light and thin wireless chargers and vertical wireless chargers, people are now gradually pursuing personalization on the basic functions of wireless chargers, and it is expected that wireless chargers are lighter and more powerful, but the existing wireless chargers cannot give consideration to both lightness and thinness and function diversification, for example, patent CN 201910000582-a charging method of wireless chargers and wireless chargers, the charging operation of the wireless chargers is realized through various circuits and modules, and the state of low charging efficiency is fed back to users through indicator lamps through reminding modules, but the indicator lamps have single lamp effect and cannot reflect charging efficiency according to lamp effect, but ring lamps or other products with complex lamp effect, the parts in the product are generally assembled together in a stacking manner, and the overall dimension of the product is relatively large, so that how to make the wireless charger take account of the light and thin profile and the annular breathing lamp is a direction that needs to be explored.
Disclosure of Invention
The invention provides a wireless charger with an annular breathing lamp effect, which is used for solving the problems that the function of the wireless charger is single and the lamp effect of the breathing lamp of the wireless charger is also single.
A wireless charger with annular breathing light effect, comprising:
the LED annular breathing lamp comprises a first circuit, a main control circuit, an LC resonance circuit and a coil; wherein the content of the first and second substances,
the input end of the first circuit is connected with an external direct-current power supply, the output end of the first circuit is electrically connected with the input end of the main control circuit, the output end of the main control circuit is electrically connected with the input end of the LC resonance circuit, the output end of the LC resonance circuit is connected with the transmitting coil, and the mobile equipment is wirelessly charged through the transmitting coil;
the LED annular breathing lamp is electrically connected with the main control circuit.
As an embodiment of the present invention: the first circuit, comprising: the front-stage input filter circuit and the EMI circuit; wherein the content of the first and second substances,
the input end of the pre-stage input filter circuit is connected with an external power supply through a USB1, the output end of the pre-stage input filter circuit is electrically connected with the input end of the EMI circuit, and the output end of the EMI circuit is electrically connected with the voltage input end of the main control circuit;
the preceding stage input filter circuit includes: diode D2, capacitor C19; wherein the content of the first and second substances,
the diode D2 is connected with a capacitor C19 in parallel;
the EMI circuit includes: a resistor R2, a resistor R3, an inductor L2; wherein the content of the first and second substances,
the resistor R2 is connected with the resistor R3 in parallel, the resistor R3 is connected with the inductor L2 in parallel, and the output end of the resistor R2 is electrically connected with the voltage input end of the main control circuit.
As an embodiment of the present invention: the master control circuit includes: the LED lamp control circuit comprises an LED lamp control circuit, a master control IC circuit, a power management circuit, a temperature detection circuit and a voltage decoding circuit; wherein the content of the first and second substances,
the output end of the LED lamp control circuit is electrically connected with the voltage input end of the master control IC circuit, the output end of the power supply management circuit is electrically connected with the current detection end of the master control IC circuit, the output end of the temperature detection circuit is connected with the temperature detection end of the master control IC circuit, and the output end of the voltage decoding circuit is electrically connected with the voltage detection end of the master control IC circuit.
As an embodiment of the present invention: the LED lamp control circuit comprises: the annular breathing lamp LED1, the annular breathing lamp LED2, the annular breathing lamp LED3, the annular breathing lamp LED4 and the LED control chip U2; wherein the content of the first and second substances,
after the annular breathing lamp LED1 and the annular breathing lamp LED2 are connected in parallel, the input end of the annular breathing lamp LED1 is connected with the LED control chip U2, and the output end of the annular breathing lamp LED2 is connected with the voltage input end of the main control IC circuit;
after the annular breathing lamp LED3 and the annular breathing lamp LED4 are connected in parallel, the input end of the annular breathing lamp LED3 is connected with the LED control chip U2, and the output end of the annular breathing lamp LED4 is connected with the voltage input end of the main control IC circuit.
As an embodiment of the present invention: the main control IC circuit is composed of a main control SOC chip U1, the voltage input end of the main control IC circuit is electrically connected with the first circuit, the voltage input end of the main control IC circuit is electrically connected with the LED lamp control circuit, the current detection end of the main control IC circuit is electrically connected with the power management circuit, the temperature detection end of the main control IC circuit is electrically connected with the temperature detection circuit, and the voltage detection end of the main control IC circuit is electrically connected with the voltage decoding circuit.
As an embodiment of the present invention: the power management circuit includes: a power management chip U6, a switch SW1, a switch SW 2; wherein the content of the first and second substances,
the voltage input end of the power management chip U6 is connected with a main control IC circuit, the SW2 control end of the power management chip U6 is connected with the switch SW2, the SW1 control end of the power management chip U6 is connected with the switch SW1, and the current detection end of the power management chip U6 is connected with the main control IC circuit.
As an embodiment of the present invention: the temperature detection circuit includes: a capacitor C35, a resistor R65, a resistor R69 and a thermistor NTC 1; wherein the content of the first and second substances,
the capacitor C35, the thermistor NTC1 and the resistor R69 are connected in parallel and then are connected in series with the resistor R65;
and the temperature detection end of the temperature detection circuit is connected with the master control IC circuit.
As an embodiment of the present invention: the voltage decoding circuit includes: a resistor R67, a resistor R68 and a capacitor C36; wherein the content of the first and second substances,
the resistor R68 is connected with the capacitor C36 in parallel and then connected with the resistor R67 in series;
and the voltage detection end of the voltage decoding circuit is connected with the master control IC circuit.
As an embodiment of the present invention: the LC resonance circuit includes: switch SW1, switch SW2, inductor L1B, capacitor 15; wherein, the first and the second end of the pipe are connected with each other,
the switch SW1 is connected in series with the capacitor 15, the inductor L1B and the switch SW 2;
and the signal decoding end of the LC resonance circuit is connected with the main control IC circuit.
As an embodiment of the present invention: the master control IC circuit further comprises a foreign matter detection process:
when the wireless charger is in a standby state, automatically circulating foreign matter detection is carried out on a charging plate of the wireless charger through a foreign matter detector;
when the foreign matter detector detects that foreign matters exist on the charging plate, the foreign matters are classified according to a foreign matter classification rule, and the category of the foreign matters is determined; wherein the foreign matter categories include: a power-consuming type foreign object or a non-power-consuming type foreign object;
when the foreign matter is determined to be the power consumption type foreign matter, sending a signal to an LED lamp control circuit to remind the foreign matter lamp effect;
and when the foreign matter is determined to be the non-power-consumption foreign matter, not carrying out foreign matter lamp effect reminding.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a wireless charger with an annular respiratory lamp effect according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first circuit of a wireless charger with an annular respiratory light effect according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an LED lamp control circuit of a wireless charger with an annular breathing lamp effect according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a power management circuit of a wireless charger with an annular respiratory lamp effect according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a main control IC circuit of a wireless charger with an annular breathing light effect according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a temperature detection circuit of a wireless charger with an annular respiratory lamp effect according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a voltage decoding circuit of a wireless charger with a ring-shaped respiration lamp effect according to an embodiment of the present invention;
FIG. 8 is a schematic top view of a wireless charger with annular breathing light effect in accordance with an embodiment of the present invention;
fig. 9 is a front view of a wireless charger with an annular breathing light effect according to an embodiment of the invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Moreover, it is noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, and "a plurality" means two or more unless specifically limited otherwise. Also, 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.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Example 1:
the embodiment of the invention provides a wireless charger with an annular breathing lamp effect, which comprises: the method comprises the following steps: the LED annular breathing lamp comprises a first circuit, a main control circuit, an LC resonance circuit and a coil; wherein the content of the first and second substances,
the input end of the first circuit is connected with an external direct-current power supply, the output end of the first circuit is electrically connected with the input end of the main control circuit, the output end of the main control circuit is electrically connected with the input end of the LC resonance circuit, the output end of the LC resonance circuit is connected with the transmitting coil, and the mobile equipment is wirelessly charged through the transmitting coil;
the LED annular breathing lamp is electrically connected with the main control circuit.
In one practical scenario: the technology of converting current into electromagnetic energy to charge mobile devices by electromagnetic induction technology is well established at present, but wireless charger products produced at present have more or less minor defects, such as: the indicating lamp has single lamp effect and cannot reflect the charging efficiency according to the lamp effect, but materials and parts in a product of an annular lamp or other products with complex lamp effects are generally assembled together in a laminating way, and the overall dimension of the product is relatively large;
DC carries out voltage stabilization operation on input voltage through a voltage stabilization module, an integrated control module is divided into two units, namely a main control unit and a micro control unit, in the main control unit, the integrated full-bridge power inverter and voltage and current demodulation are realized through an SOC chip, in addition, the mobile equipment is detected whether to be charged or not through periodically sending ping signals to the mobile equipment, meanwhile, the standby power consumption is reduced to the maximum extent, the main control SOC chip carries out uninterrupted monitoring on all communication from the mobile equipment, the transmitting power is correspondingly adjusted through changing the switching frequency, the duty ratio or the phase position of an internal MOS (metal oxide semiconductor), meanwhile, the integrated control module is electrically connected with a foreign matter detection module, when the foreign matter detection module detects foreign matters, the main control unit sends a signal for stopping the charging of the micro mobile equipment, the main control unit immediately stops the charging, an LED annular breathing lamp is electrically connected with the micro control unit, and different lamp effects of the LED annular breathing lamp are set through the micro control unit for displaying, the resonance module is electrically connected with the integrated control module, and in the resonance module, the capacitance energy is converted into magnetic field energy through the LC resonance circuit, and the mobile equipment is charged through the coil; the structure of the invention is shown in figures 8 and 9, and figure 8 shows that the shape of the invention is a circle, and the middle circular part is protruded. It can also be seen from fig. 9 that 1 is the main body of the present invention, 2 is the charging port of the present invention, and 3 is the ring-shaped breathing lamp of the present invention, and it can be seen from the attached drawings that the lamp light of the present invention is structurally different from the single display characteristic of a plurality of single lamp lights in the prior art, and the ring-shaped lamp light of the present invention can be richer.
The beneficial effects of the above technical scheme are: according to the invention, various signals of the wireless charger can be intelligently processed through the integrated control module, various judgment and protection functions are set in the integrated control module, the damage of an emergency situation to the wireless charger can be effectively prevented, meanwhile, the switching frequency, the duty ratio or the phase of an internal MOS (metal oxide semiconductor) is changed to correspondingly adjust the transmitting power, different types of mobile equipment can be wirelessly charged by adjusting the transmitting power, various types of mobile equipment can be compatible, the real-time situation of the mobile equipment during charging can be effectively known through different lamp effects of the LED annular breathing lamp, a foreign matter blocking the mobile equipment from charging can be quickly detected through the foreign matter detection module, and indication and reminding are carried out through the LED annular breathing lamp.
In a specific embodiment, when the mobile device is wirelessly charged, the charging efficiency is generally high without a wire, because the transmission efficiency between the primary coil and the secondary coil cannot reach 100% when the mobile device is wirelessly charged, and in order to improve the efficiency of the wireless charging, the charging efficiency can be improved by reducing a loss factor during the charging;
step 1: obtaining a loss factor during wireless charging:
Figure BDA0003635691200000081
wherein rho is a loss factor, W is a coupling factor, D is a quality factor of the coil, and when the product of the coupling factor and the quality factor of the coil is larger, the loss of the wireless charger is smaller during charging;
step 2: determining factors for obtaining the coupling factor:
Figure BDA0003635691200000091
wherein L is 1 Indicating the size of the coil, L 2 Indicating the material of the coil;
and step 3: determining factor for obtaining quality factor of coil:
Figure BDA0003635691200000092
wherein, R represents the resistance value of the coil, and L represents the inductance of the coil;
the beneficial effects of the above technical scheme are: in the invention, the determining factors of the two factors are obtained according to the loss factor during wireless charging, and the charging efficiency of the wireless charger is improved by improving the determining factors of the two factors.
Example 2:
in one embodiment, the first circuit includes: the front-stage input filter circuit and the EMI circuit; wherein the content of the first and second substances,
the input end of the pre-stage input filter circuit is connected with an external power supply through a USB1, the output end of the pre-stage input filter circuit is electrically connected with the input end of the EMI circuit, and the output end of the EMI circuit is electrically connected with the voltage input end of the main control circuit;
the preceding stage input filter circuit includes: diode D2, capacitor C19; wherein the content of the first and second substances,
the diode D2 is connected with a capacitor C19 in parallel;
the EMI circuit includes: a resistor R2, a resistor R3, an inductor L2; wherein the content of the first and second substances,
the resistor R2 is connected with the resistor R3 in parallel, the resistor R3 is connected with the inductor L2 in parallel, and the output end of the resistor R2 is electrically connected with the voltage input end of the main control circuit.
In one practical scenario: the voltage stabilizing module generally comprises voltage stabilizing circuits, wherein the voltage stabilizing circuits are of various types, and a series type voltage stabilizing circuit and an integrated type voltage stabilizing circuit are provided, but the voltage stabilizing performance of the circuit is not high enough, the output voltage can not be adjusted at will,
when the voltage stabilizing circuit is implemented, the current is controlled by the voltage comparator, the reverse end voltage value is obtained at the reverse end of the voltage comparator, when the reverse end voltage value exceeds the preset reverse end voltage value, the reverse end voltage is limited by the current limiting resistor, and the reverse end voltage value is stabilized in the range of the preset voltage value to obtain the stable voltage.
The beneficial effects of the above technical scheme are: in the invention, the reverse end voltage is limited by the current limiting resistor and stabilized within the range of the preset voltage value, so that the input voltage instability caused by self excitation can be avoided, and the overcurrent protection function can be realized by the current limiting resistor.
Example 3:
in one embodiment, the master control circuitry comprises: the LED lamp control circuit comprises an LED lamp control circuit, a master control IC circuit, a power management circuit, a temperature detection circuit and a voltage decoding circuit; wherein the content of the first and second substances,
the output end of the LED lamp control circuit is electrically connected with the voltage input end of the master control IC circuit, the output end of the power supply management circuit is electrically connected with the current detection end of the master control IC circuit, the output end of the temperature detection circuit is connected with the temperature detection end of the master control IC circuit, and the output end of the voltage decoding circuit is electrically connected with the voltage detection end of the master control IC circuit.
The working principle of the technical scheme is as follows: in the prior art of the invention, a control module receives signals, transmits driving signals and charges mobile equipment, although wireless charging can be carried out, the functions are not powerful enough and can not process more and more complex situations, for example, for mobile equipment of different models, the required transmission frequency is different, and how to adjust the transmission frequency, in the invention, a main control unit in an integrated control module mainly adopts SOC (U1- -NE8051) integrated control technology, detects whether the mobile equipment is charging or not by periodically sending ping signals to the mobile equipment, and simultaneously reduces standby power consumption to the maximum extent by the way, a main control SOC chip carries out uninterrupted monitoring on all communications from the mobile equipment, and correspondingly adjusts the transmission power by changing the switching frequency, duty ratio or phase of an internal MOS (metal oxide semiconductor) in a micro control unit, and the status indication of the LED annular breathing lamp effect is set through the external MCU programming, and the LED annular breathing lamp is controlled.
The beneficial effects of the above technical scheme are: in the invention, the charging condition of the mobile equipment can be detected in time by periodically sending ping signals to the mobile equipment, the situation that the wireless charger is always in a working state for detecting the signals of the mobile equipment can be avoided, and the mobile equipment meeting different requirements can be wirelessly charged as much as possible by adjusting the transmitting power.
Example 4:
in one embodiment, the LED lamp control circuit includes: the annular breathing lamp LED1, the annular breathing lamp LED2, the annular breathing lamp LED3, the annular breathing lamp LED4 and the LED control chip U2; wherein the content of the first and second substances,
after the annular breathing lamp LED1 and the annular breathing lamp LED2 are connected in parallel, the input end of the annular breathing lamp LED1 is connected with the LED control chip U2, and the output end of the annular breathing lamp LED2 is connected with the voltage input end of the main control IC circuit;
after the annular breathing lamp LED3 and the annular breathing lamp LED4 are connected in parallel, the input end of the annular breathing lamp LED3 is connected with the LED control chip U2, and the output end of the annular breathing lamp LED4 is connected with the voltage input end of the main control IC circuit.
The working principle of the technical scheme is as follows: in the prior art, an LED lamp of a wireless charger is a common LED lamp and is basically an LED lamp which is used for indicating charging, but the lamp effect of the indicator lamp is single and can not respond to various kinds of charging information according to the lamp effect, in the invention, 4 lamp effects can be generated by the LED annular breathing lamp, namely a normally-on lamp effect of the LED annular breathing lamp, a fast-flashing lamp effect of the LED annular breathing lamp, a slow-flashing lamp effect of the LED annular breathing lamp and a continuous-flashing lamp effect of the LED annular breathing lamp, wherein the 4 lamp effects represent 4 different charging states, the LED annular breathing lamp is normally-on and represents two states, the first state represents that the wireless charger is electrified and does not wirelessly charge the mobile equipment, the second state represents that the mobile equipment is charged, when the LED annular breathing lamp flashes quickly, the wireless charger is connected with the mobile equipment, and when the LED annular breathing lamp flashes slowly, the representative wireless charger is charging the mobile device wirelessly, and when the LED annular breathing lamp continuously flickers, the representative wireless charger detects that a power-consuming foreign object exists on the representative wireless charger.
The beneficial effects of the above technical scheme are: according to the invention, the wireless charging state of the mobile equipment is displayed through 4 lamp effects of the LED annular breathing lamp, so that a user can know the charging state of the wireless charger according to the lamp effects, and the lamp effects of the LED annular breathing lamp are bright and glaring, so that better experience can be brought to the user.
Example 5:
in one embodiment, the main control IC circuit is composed of a main control SOC chip U1, a voltage input terminal of which is electrically connected to the first circuit, a voltage input terminal of which is electrically connected to the LED lamp control circuit, a current detection terminal of which is electrically connected to the power management circuit, a temperature detection terminal of which is electrically connected to the temperature detection circuit, and a voltage detection terminal of which is electrically connected to the voltage decoding circuit.
The working principle of the technical scheme is as follows: in the invention, in the LC resonance circuit, electric energy is stored in the capacitor, the electric energy of the capacitor discharges to the coil and converts the electric energy of the capacitor into the magnetic energy of the coil, when the electric energy of the capacitor finishes discharging, all the electric energy is converted into the magnetic energy of the coil, and the energy of a resonance signal is consumed through the resistor in the LC resonance circuit, so that the output voltage reaches a voltage stabilization state.
The beneficial effects of the above technical scheme are: in the LC resonance circuit, electric energy is converted into magnetic energy through simple capacitance and inductance, and redundant energy of resonance signals is consumed through a resistor in the LC resonance circuit, so that the output voltage reaches a voltage stabilization state.
Example 6:
in one embodiment, the power management circuit includes: a power management chip U6, a switch SW1, a switch SW 2; wherein the content of the first and second substances,
the voltage input end of the power management chip U6 is connected with a main control IC circuit, the SW2 control end of the power management chip U6 is connected with the switch SW2, the SW1 control end of the power management chip U6 is connected with the switch SW1, and the current detection end of the power management chip U6 is connected with the main control IC circuit.
The working principle of the technical scheme is as follows: in the prior art, a switching value detector is arranged on a charging plate to detect foreign matters, a switching value sensor is arranged in a wireless charger to receive signals of the switching value detector, the detector needs to be manually switched on and off and cannot be intelligently switched on and off, in the invention, a detection pulse is sent to the charging plate through the foreign matter detector, when the detection pulse detects that foreign matters exist on the charging plate, the detected foreign matters are classified according to a foreign matter classification rule, and when the foreign matters are determined to be power consumption type foreign matters, a signal is sent to an integrated control module, so that an LED annular breathing lamp continuously flickers to prompt the presence of the foreign matters.
The beneficial effects of the above technical scheme are: according to the invention, the foreign matter detector sends detection pulses to the charging panel to detect the foreign matters and determine the types of the foreign matters, when some metal objects are placed on the charging panel, an electromagnetic field can be caused to react, and when the coil of the wireless charger outputs energy, eddy currents can be formed on the surfaces of the objects to cause heating or directly cause fire.
In a specific embodiment, the power consumption type foreign matter is determined to be detected and identified by the detection pulse of the foreign matter detector, and after the power consumption of the foreign matter is determined, a signal is sent to the LED annular breathing lamp to remind the foreign matter;
step 1: the foreign body detector sends pulse waves to the coil at regular time:
Figure BDA0003635691200000141
wherein L represents a coil, f l Representing the pulse wave received on the coil, R representing the thermistor, T 0 Represents the duration of the pulse, Q is the coil quality factor;
step 2: determining the current value on the coil from the pulse wave:
Figure BDA0003635691200000142
wherein d denotes a primary coil, I d Representing the value of the current on the primary coil, M representing the end time of the pulse wave, V M Voltage value representing the end time of the pulse wave, N representing the start time of the pulse wave, V N A voltage value indicating a start time of the pulse wave;
and step 3: judging whether foreign matters exist on the charging plate according to the current value on the coil:
Figure BDA0003635691200000143
wherein, I n1 At the lowest value of the predetermined current threshold, I n2 Is the highest value of the preset current threshold value when I d When the current is in the preset current threshold value, the magnetic field of the primary coil is free of foreign matters, and when I is in the preset current threshold value d And when the current is not at the preset current threshold value, the foreign matter appears on the charging plate.
The beneficial effects of the above technical scheme are: in the invention, the real-time current of the primary coil is obtained by sending the pulse wave to the primary coil, and when the current value of the primary coil is in the threshold range, the magnetic field range of the primary coil can be judged to have no foreign matter, otherwise, the primary coil has the foreign matter, and whether the foreign matter on the charging plate affects the charging can be quickly judged by the method.
Example 7:
in one embodiment, the temperature detection circuit includes: a capacitor C35, a resistor R65, a resistor R69 and a thermistor NTC 1; wherein the content of the first and second substances,
the capacitor C35, the thermistor NTC1 and the resistor R69 are connected in parallel and then are connected in series with the resistor R65;
and the temperature detection end of the temperature detection circuit is connected with the master control IC circuit.
The working principle of the technical scheme is as follows: in the prior art, the control module receives signals and transmits driving signals to carry out wireless charging, and basic wireless charging can be carried out, but the function of the control module is not diverse enough, so that the capability of resisting risks is not large enough, and the whole circuit is easy to generate short circuit condition due to overhigh temperature or overcurrent, and (4) disconnecting the normally closed contact of the thermal relay, stopping wireless charging, and performing NTC overheating protection.
The beneficial effects of the above technical scheme are: in the invention, the wireless charger is also provided with a plurality of functions of protecting the circuit on the basis of wireless charging, and the wireless charger is characterized in that the wireless charger comprises the following key components: the switching regulator, the voltage regulator tube, the thermistor and the thermal relay can realize the protection functions of undervoltage, overvoltage, overcurrent and overheat, so that the wireless charger is safer to use.
Example 8:
in one embodiment, the voltage decoding circuit includes: a resistor R67, a resistor R68 and a capacitor C36; wherein the content of the first and second substances,
the resistor R68 is connected with the capacitor C36 in parallel and then connected with the resistor R67 in series;
and the voltage detection end of the voltage decoding circuit is connected with the master control IC circuit.
The working principle of the technical scheme is as follows: according to the invention, the foreign matter detector can continue foreign matter detection by transmitting detection pulses to the charging plate, when the foreign matter is detected, whether the wireless charging power is consumed or not is detected, when low power consumption is detected, the foreign matter is determined to be a power consumption type foreign matter, the LED annular breathing lamp continuously flickers to remind the presence of the foreign matter, and when the non-power consumption type foreign matter exists, the foreign matter does not need to be reminded.
The beneficial effects of the above technical scheme are: according to the invention, the foreign matters can be classified into power consumption type foreign matters and non-power consumption type foreign matters through a foreign matter classification rule, the power consumption type foreign matter reminding is carried out on a user through continuous flickering of the LED annular breathing lamp, the foreign matters are prevented from generating eddy currents, generating heat and causing fire, the energy transmission of the non-power consumption type foreign matters is avoided, and the foreign matter reminding is not carried out through the LED annular breathing lamp.
Example 9:
in one embodiment, the LC resonant circuit includes: switch SW1, switch SW2, inductor L1B, capacitor 15; wherein the content of the first and second substances,
the switch SW1 is connected in series with the capacitor 15, the inductor L1B and the switch SW 2;
and the signal decoding end of the LC resonance circuit is connected with the main control IC circuit.
The working principle of the technical scheme is as follows: in the invention, in the power transmission control, when an integrated control module receives and confirms an authentication signal of the mobile equipment, high-power transmission is carried out on the mobile equipment, and when the low-power consumption is detected, the power transmission is required to be stopped, and the continuous flashing reminding of the LED annular breathing lamp is carried out.
The beneficial effects of the above technical scheme are: in the invention, the power transmission control subunit is not only responsible for power transmission of the mobile equipment, but also determines that the low-power consumption is a result caused by the foreign object by combining the detection result of the foreign object detector when the low-power consumption is detected, and prompts the foreign object.
Example 10:
in one embodiment, the master IC circuit further comprises a foreign object detection procedure:
when the wireless charger is in a standby state, automatically circulating foreign matter detection is carried out on a charging plate of the wireless charger through a foreign matter detector;
when the foreign matter detector detects that foreign matters exist on the charging plate, the foreign matters are classified according to a foreign matter classification rule, and the category of the foreign matters is determined; wherein the foreign matter categories include: a power-consuming type foreign object or a non-power-consuming type foreign object;
when the foreign matter is determined to be the power consumption type foreign matter, sending a signal to an LED lamp control circuit to remind the foreign matter lamp effect;
and when the foreign matter is determined to be the non-power-consumption foreign matter, not performing the foreign matter lamp effect reminding.
The working principle of the technical scheme is as follows: in the prior art, the annular lamp or other products with complex lamp effects are generally assembled together in a laminating mode, the overall dimension of the products is relatively large, in the invention, the LED annular breathing lamp is embedded on a charging plate of a wireless charger in a cross-shaped symmetrical arrangement mode, and structurally, a peripheral light guide ring rubber ring of the LED annular breathing lamp is made of acrylic materials.
The beneficial effects of the above technical scheme are: according to the LED lamp, the LED annular breathing lamps are symmetrically arranged in a cross manner, the light emitting effect of the LED lamps is enhanced, the acrylic annular light guide rubber ring is structurally used, the lamp effect is brighter and glaring, the light transmission is brighter, the gorgeous breathing lamp display effect is reflected when the mobile terminal is charged, the design cost is reduced on one hand, the development period is saved on the other hand, and the user experience is improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A wireless charger with annular breathing lamp effect, characterized by comprising: the LED annular breathing lamp comprises a first circuit, a main control circuit, an LC resonance circuit and a coil; wherein the content of the first and second substances,
the input end of the first circuit is connected with an external direct-current power supply, the output end of the first circuit is electrically connected with the input end of the main control circuit, the output end of the main control circuit is electrically connected with the input end of the LC resonance circuit, the output end of the LC resonance circuit is connected with the transmitting coil, and the mobile equipment is wirelessly charged through the transmitting coil;
the LED annular breathing lamp is electrically connected with the main control circuit.
2. The wireless charger with annular breathing lamp effect of claim 1, wherein the first circuit comprises: the front-stage input filter circuit and the EMI circuit; wherein the content of the first and second substances,
the input end of the pre-stage input filter circuit is connected with an external power supply through a USB1, the output end of the pre-stage input filter circuit is electrically connected with the input end of the EMI circuit, and the output end of the EMI circuit is electrically connected with the voltage input end of the main control circuit;
the preceding stage input filter circuit includes: diode D2, capacitor C19; wherein the content of the first and second substances,
the diode D2 is connected with a capacitor C19 in parallel;
the EMI circuit includes: a resistor R2, a resistor R3, an inductor L2; wherein the content of the first and second substances,
the resistor R2 is connected with the resistor R3 in parallel, the resistor R3 is connected with the inductor L2 in parallel, and the output end of the resistor R2 is electrically connected with the voltage input end of the main control circuit.
3. The wireless charger with annular breathing lamp effect of claim 1, wherein the main control circuit comprises: the LED lamp control circuit comprises an LED lamp control circuit, a master control IC circuit, a power management circuit, a temperature detection circuit and a voltage decoding circuit; wherein the content of the first and second substances,
the output end of the LED lamp control circuit is electrically connected with the voltage input end of the master control IC circuit, the output end of the power supply management circuit is electrically connected with the current detection end of the master control IC circuit, the output end of the temperature detection circuit is connected with the temperature detection end of the master control IC circuit, and the output end of the voltage decoding circuit is electrically connected with the voltage detection end of the master control IC circuit.
4. The wireless charger with annular breathing light effect of claim 1, wherein the LED light control circuit comprises: the annular breathing lamp LED1, the annular breathing lamp LED2, the annular breathing lamp LED3, the annular breathing lamp LED4 and the LED control chip U2; wherein the content of the first and second substances,
after the annular breathing lamp LED1 and the annular breathing lamp LED2 are connected in parallel, the input end of the annular breathing lamp LED1 is connected with the LED control chip U2, and the output end of the annular breathing lamp LED2 is connected with the voltage input end of the main control IC circuit;
after the annular breathing lamp LED3 is connected with the annular breathing lamp LED4 in parallel, the input end of the annular breathing lamp LED3 is connected with the LED control chip U2, and the output end of the annular breathing lamp LED4 is connected with the voltage input end of the main control IC circuit.
5. The wireless charger with annular breathing lamp effect as claimed in claim 1, wherein the master control IC circuit is composed of a master control SOC chip U1, a voltage input terminal of which is electrically connected to the first circuit, a voltage input terminal of which is electrically connected to the LED lamp control circuit, a current detection terminal of which is electrically connected to the power management circuit, a temperature detection terminal of which is electrically connected to the temperature detection circuit, and a voltage detection terminal of which is electrically connected to the voltage decoding circuit.
6. The wireless charger with annular breathing lamp effect of claim 1, wherein the power management circuit comprises: a power management chip U6, a switch SW1, a switch SW 2; wherein the content of the first and second substances,
the voltage input end of the power management chip U6 is connected with a main control IC circuit, the SW2 control end of the power management chip U6 is connected with the switch SW2, the SW1 control end of the power management chip U6 is connected with the switch SW1, and the current detection end of the power management chip U6 is connected with the main control IC circuit.
7. The wireless charger with annular breathing lamp effect as claimed in claim 1, wherein the temperature detection circuit comprises: a capacitor C35, a resistor R65, a resistor R69 and a thermistor NTC 1; wherein the content of the first and second substances,
the capacitor C35, the thermistor NTC1 and the resistor R69 are connected in parallel and then are connected in series with the resistor R65;
and the temperature detection end of the temperature detection circuit is connected with the master control IC circuit.
8. The wireless charger with annular breathing lamp effect of claim 1, wherein the voltage decoding circuit comprises: a resistor R67, a resistor R68 and a capacitor C36; wherein the content of the first and second substances,
the resistor R68 is connected with the capacitor C36 in parallel and then connected with the resistor R67 in series;
and the voltage detection end of the voltage decoding circuit is connected with the main control IC circuit.
9. The wireless charger with annular breathing lamp effect of claim 1, wherein the LC resonant circuit comprises: switch SW1, switch SW2, inductor L1B, and capacitor 15; wherein the content of the first and second substances,
the switch SW1 is connected in series with the capacitor 15, the inductor L1B and the switch SW 2;
and the signal decoding end of the LC resonance circuit is connected with the main control IC circuit.
10. The wireless charger with annular breathing light effect of claim 1, wherein the master control IC circuit further comprises a foreign object detection process:
when the wireless charger is in a standby state, automatically circulating foreign matter detection is carried out on a charging plate of the wireless charger through a foreign matter detector;
when the foreign matter detector detects that foreign matters exist on the charging plate, the foreign matters are classified according to a foreign matter classification rule, and the category of the foreign matters is determined; wherein the foreign matter categories include: a power-consuming type foreign object or a non-power-consuming type foreign object;
when the foreign matter is determined to be the power consumption type foreign matter, sending a signal to an LED lamp control circuit to remind the foreign matter lamp effect;
and when the foreign matter is determined to be the non-power-consumption foreign matter, not performing the foreign matter lamp effect reminding.
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