CN113725966A - Wireless charger with external direct-current power supply and charging method - Google Patents
Wireless charger with external direct-current power supply and charging method Download PDFInfo
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- CN113725966A CN113725966A CN202110957099.4A CN202110957099A CN113725966A CN 113725966 A CN113725966 A CN 113725966A CN 202110957099 A CN202110957099 A CN 202110957099A CN 113725966 A CN113725966 A CN 113725966A
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- 238000005516 engineering process Methods 0.000 description 4
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- 239000002184 metal Substances 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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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- 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
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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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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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
- H02J7/0029—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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
Abstract
The invention discloses a wireless charger with an external direct-current power supply, which is characterized by comprising: the direct current power supply module is connected to an external direct current power supply circuit and used for processing current input from the outside; the wireless charging module is electrically connected with the direct-current power supply module and is also provided with a transmitting coil for transmitting the electric energy provided by the direct-current power supply module to an external electric appliance. The invention has the beneficial effects that: the FB/PWM/I2C mode is adopted to control the direct-current power supply module, so that the defect that USB protocol equipment is not suitable for fixed voltage output in the prior art is overcome; meanwhile, the design of the external direct-current power supply module is adopted, so that the problems that the power is low and the charger is hot due to high heat production of a power device in the using process are solved.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charger with an external direct-current power supply and a charging method.
Background
Wireless charging technology (english: Wireless charging technology; Wireless charging technology) is derived from Wireless power transmission technology, and can be divided into two modes of low-power Wireless charging and high-power Wireless charging. The low-power wireless charging is usually performed by electromagnetic induction, such as Qi charging for mobile phones. High-power wireless charging usually adopts a resonance mode (the mode is adopted by most electric vehicles) and energy is transmitted to a device for power utilization by a power supply device (a charger), and the device charges a battery by using received energy and is used for self operation. Wireless charging is widely applied to public places, businesses, households and other places to charge various battery-powered devices as a non-contact and remote charging method.
In the prior art, a built-in DCDC circuit is generally used, and the voltage of a bus of a wireless charging and transmitting terminal is adjusted through a USB protocol (PD/QC, etc.) to transmit different powers to a receiving terminal under the condition of no change of frequency. Neither of these forms is suitable for higher voltage powered applications: the built-in DCDC circuit mode, the built-in back of DCDC circuit can not dispel the heat in the transmission base because of the reason of efficiency conversion, can lead to the temperature rise of whole transmitting system too high. During actual charging, the receiving end (such as a mobile phone) is influenced to actively reduce power for charging due to high surface temperature, so that the charging time is prolonged, the experience is poor or other potential safety hazards exist. Such as adding some active heat dissipation devices, also affects cost. The USB protocol (PD/QC, etc.) mode is required to be applied to the environment with USB protocol, and is not suitable for the scenario of fixed voltage output.
Disclosure of Invention
In view of the above problems in the prior art, a wireless charger with an external dc power supply and a charging method thereof are provided.
The specific technical scheme is as follows:
a wireless charger with an external DC power supply comprises:
the direct current power supply module is connected to an external direct current power supply circuit and used for processing current input from the outside;
the wireless charging module is electrically connected with the direct-current power supply module and is also provided with a transmitting coil for transmitting the electric energy provided by the direct-current power supply module to an external electric appliance.
Preferably, the dc power supply module includes:
the input pin of the power supply chip is connected to the external direct current circuit, and the input current is subjected to voltage reduction processing and then is output to the wireless charging module;
the connection part of the input pin of the power supply chip and the external direct current circuit is grounded through a plurality of input capacitors connected in parallel;
and an output pin of the power supply chip is connected to the input end of the wireless charging module through an output measuring resistor.
Preferably, two ends of the measuring resistor are further connected to a first output compensation pin and a second output compensation pin of the power chip respectively.
Preferably, the wireless charging module includes:
the charging management chip is connected to the direct-current power supply module and sends a control signal to the direct-current power supply module;
the control signal is a feedback signal, and/or a pulse width modulation signal, and/or a bus signal.
The current detection circuit is connected to the charging management chip and is used for generating a current signal;
the voltage detection circuit is connected to the charging management chip and used for generating a voltage signal;
and the temperature detection circuit is connected to the charging management chip and is used for generating a temperature signal according to the temperature of the transmitting coil.
Preferably, the charging management chip judges whether the current is greater than a preset overcurrent limit value according to the current signal, and selects whether to stop charging according to a current judgment result;
the charging management chip judges whether the voltage is greater than a preset overvoltage limit value according to the voltage signal and selects whether to stop charging according to a voltage judgment result;
and the charging management chip judges whether the temperature of the transmitting coil is greater than a preset over-temperature limit value according to the temperature signal and gradually reduces charging power according to a temperature judgment result.
Preferably, the wireless charging module further includes:
the full-bridge driving circuit is connected with the charging management chip and the direct-current power supply module;
one end of the resonant capacitor is connected with the output end of the full-bridge driving circuit, and the other end of the resonant capacitor is connected to the transmitting coil;
and the LED indicating circuit is connected with the charging management chip and is used for sending a reminding signal or an alarm signal.
Preferably, a first detection point is arranged at a connection position of the resonant capacitor and the transmitting coil, and the first detection point is connected with:
the output end of the quality factor detection circuit is connected to the charging management chip and is used for detecting whether the external electric appliance is a receiving end which accords with the charging standard;
and the output end of the decoding circuit is connected to the charging management chip and is used for receiving the charging information sent by the external electrical appliance.
A charging method of a wireless charger is suitable for the wireless charger, a charging management chip of the wireless charger continuously transmits a detection signal to the outside through a transmitting coil at preset time intervals, and receives a return signal through a quality factor detection circuit;
the method specifically comprises the following steps:
step S1: judging whether the return signal has change or not;
if yes, go to step S2;
if not, returning to the step S1;
step S2: sending a pairing signal to an external electric appliance;
step S3: judging whether the external electrical appliance returns charging information or not;
if yes, go to step S4;
if not, returning to the step S1;
step S4: adjusting a full-bridge driving circuit to drive the transmitting coil according to the charging information;
step S5: judging whether a fault exists according to the current signal and the voltage signal;
if yes, finishing charging and sending an alarm signal;
if not, go to step S6;
step S6: judging whether the charging temperature is too high according to the temperature signal;
if yes, go to step S7;
if not, go to step S8;
step S7: sending a control signal to a direct current power supply module to reduce the output power of the direct current power supply module;
step S8: receiving the charging information again, and judging whether to finish charging;
if yes, finishing charging and sending out a reminding signal;
if not, the process returns to the step S4.
Preferably, the step S5 includes:
step S51: judging whether the current is larger than a preset overcurrent limit value or not according to the current signal;
if yes, finishing charging and sending an alarm signal;
if not, go to step S52;
step S52: judging whether the voltage is greater than a preset overvoltage limit value or not according to the voltage signal;
if yes, finishing charging and sending an alarm signal;
if not, the process goes to step S6.
The technical scheme has the following advantages or beneficial effects: the FB/PWM/I2C mode is adopted to control the direct-current power supply module, so that the defect that USB protocol equipment is not suitable for fixed voltage output in the prior art is overcome; meanwhile, the design of the external direct-current power supply module is adopted, so that the problems that the power is low and the charger is hot due to high heat production of a power device in the using process are solved.
Drawings
Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the invention.
FIG. 1 is an overall schematic diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of a wireless charging module according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a power module according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a current detection circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a full bridge driving circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a quality factor circuit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a decoding circuit according to an embodiment of the present invention;
FIG. 8 is a flowchart of a charging method according to an embodiment of the present invention;
fig. 9 is a schematic diagram of the substep of S5 according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The invention comprises the following steps:
a wireless charger with an external dc power supply, as shown in fig. 1 and 2, comprising:
the direct current power supply module 1 is connected to an external direct current power supply circuit and used for processing current input from the outside;
the wireless charging module 2, the wireless charging module 2 and the dc power supply module 1 are electrically connected, and the wireless charging module further has a transmitting coil 28 for transmitting the electric energy provided by the dc power supply module 1 to an external electrical appliance.
In a preferred embodiment, as shown in fig. 3, the dc power supply module 1 includes:
the input pin of the power supply chip 11 is connected to an external direct current circuit, and the input current is subjected to voltage reduction processing and then output to the wireless charging module 2;
the connection between the input pin of the power chip 11 and the external dc circuit is grounded through a plurality of input capacitors C35, C36, C37, and C38 connected in parallel;
the output pin of the power supply chip is connected to the input end of the wireless charging module through an output measuring resistor R36.
In a preferred embodiment, two ends of the measurement resistor R36 are further connected to the first output compensation pin SNS1N and the second output compensation pin SNS2N of the power chip, respectively.
In a preferred embodiment, the wireless charging module 2 includes:
the charging management chip 21 is connected to the direct-current power supply module and sends a control signal to the direct-current power supply module;
the control signal is a feedback signal, and/or a pulse width modulation signal, and/or a bus signal.
A current detection circuit 22, the current detection circuit 22 being connected to the charge management chip 21 for generating a current signal;
specifically, as shown in fig. 4, the current detection circuit IS connected to the full-BRIDGE driving circuit 25 through the V _ BRIDGE port, and IS input to the IS _ INN pin and the IS _ INP pin of the charging management chip through the sampling resistors R11 and R12, so as to collect the current during the charging process, so that the charging management chip 21 can determine whether the current IS over-current.
A voltage detection circuit 23, the voltage detection circuit 23 being connected to the charge management chip 21 for generating a voltage signal;
a temperature detection circuit 24, the temperature detection circuit 24 being connected to the charging management chip 21 for generating a temperature signal according to the temperature of the transmitting coil.
In a preferred embodiment, the charging management chip 21 determines whether the current is greater than a preset overcurrent limit according to the current signal, and selects whether to stop charging according to a current determination result;
the charging management chip 21 judges whether the voltage is greater than a preset overvoltage limit value according to the voltage signal, and selects whether to stop charging according to a voltage judgment result;
the charging management chip 21 judges whether the temperature of the transmitting coil is greater than a preset over-temperature limit value according to the temperature signal, and gradually reduces the charging power according to a temperature judgment result.
In a preferred embodiment, the wireless charging module 2 further comprises:
the full-bridge driving circuit 25, the full-bridge driving circuit 25 connects the charging management chip and the direct current power module;
specifically, as shown in fig. 5, the full-bridge driving circuit 25 includes 4 field effect transistors Q1, Q2, Q3, Q4, and gates of the field effect transistors Q1, Q2, Q3, Q4 are connected to the power output pins PA _ GH1, PA _ GL1, PA _ GH2, PA _ GL2 of the charge management chip 21, respectively. The source electrodes of the field effect transistor Q1 and the field effect transistor Q3, and the drain electrodes of the field effect transistor Q2 and the field effect transistor Q4 are connected to the transmitting coil L1, and are used for driving the transmitting coil L1 to transmit electric energy.
One end of the resonant capacitor 26 is connected with the output end of the full-bridge driving circuit, and the other end of the resonant capacitor is connected to the transmitting coil;
in a preferred embodiment, the resonant capacitor 26 is composed of a plurality of capacitors C13, C16, C17, C20 and C21 connected in parallel. The parallel capacitors are arranged to achieve a good oscillation effect.
And the LED indicating circuit 27 is connected with the charging management chip and is used for sending a reminding signal or an alarm signal.
In a preferred embodiment, the junction of the resonant capacitor 26 and the transmitting coil 28 is provided with a first detection point to which are connected:
the output end of the quality factor detection circuit is connected to the charging management chip and is used for detecting whether the external electrical appliance is a receiving end which accords with the charging standard;
specifically, as shown in fig. 6, the quality factor detection circuit 29 is connected to the transmitting coil 28 through a capacitor C5, and is connected to the LDO33 pin of the charge management chip 21 through a resistor R9, and is grounded through a resistor R16; the quality factor detection circuit 29 is also connected to the ADC1 pin of the charge management chip 21 through a diode D2, a resistor R14, and a resistor R14 in this order.
And the output end of the decoding circuit 210 is connected to the charging management chip 21, and is used for receiving the charging information sent by the external electrical appliance.
Specifically, as shown in fig. 7, when the transmitting coil 28 receives a signal sent by an external electrical appliance, the signal is input to the DMO D _ VIN pin of the charging management chip 21 through the diode D1, the resistor R2, the resistor R1, and the capacitor C1; the connection position of the capacitor C1 and the DMO D _ VIN pin is also grounded through a capacitor C3; the junction of the resistor R2 and the resistor R1 is grounded through a group of capacitors C2 and a resistor R3 which are connected in parallel.
A charging method of the wireless charger is suitable for the wireless charger, a charging management chip of the wireless charger continuously transmits a detection signal to the outside through a transmitting coil at preset time intervals, and receives a return signal through a quality factor detection circuit;
as shown in fig. 8, the method specifically includes:
step S1: judging whether the return signal has change;
if yes, go to step S2;
if not, returning to the step S1;
specifically, when the surface of the wireless charging/transmitting terminal has no receiving terminal or other foreign matter, the dc power supply module 1 is set to 5V by the charging management chip 21. The charging management chip 21 transmits an analog signal every 500mS through the full-bridge driving circuit 25, the resonant capacitor 26 and the transmitting coil 28 to detect whether there is an object on the surface.
Step S2: sending a pairing signal to an external electric appliance;
step S3: judging whether the external electrical appliance returns charging information or not;
if yes, go to step S4;
if not, returning to the step S1;
specifically, when there is a receiving end or other metal foreign object, the charging management chip 21 will detect a different level variation waveform through the quality factor detection circuit 29; then, a digital connection signal is sent to the receiving end or the metal foreign object, when the receiving end receives the digital connection signal, the decoding circuit of the transmitting end outputs information to the charging management chip 21 through the ASK form to identify the receiving end as a receiving end meeting the standard, and then the transmitting end continues to transmit power to the receiving end. If the foreign object is metal, the transmitting end can not receive the decoded digital signal, and the transmitting power is stopped.
Step S4: adjusting the full-bridge driving circuit according to the charging information to drive the transmitting coil;
step S5: judging whether a fault exists according to the current signal and the voltage signal;
if yes, finishing charging and sending an alarm signal;
if not, go to step S6;
step S6: judging whether the charging temperature is too high according to the temperature signal;
if yes, go to step S7;
if not, go to step S8;
step S7: sending a control signal to the direct current power supply module to reduce the output power of the direct current power supply module;
step S8: receiving the charging information again, and judging whether to finish charging;
if yes, finishing charging and sending out a reminding signal;
if not, the process returns to step S4.
In a preferred embodiment, as shown in fig. 9, step S5 includes:
step S51: judging whether the current is larger than a preset overcurrent limit value or not according to the current signal;
if yes, finishing charging and sending an alarm signal;
if not, go to step S52;
step S52: judging whether the voltage is greater than a preset overvoltage limit value or not according to the voltage signal;
if yes, finishing charging and sending an alarm signal;
if not, the process goes to step S6.
The invention has the beneficial effects that: the FB/PWM/I2C mode is adopted to control the direct-current power supply module, so that the defect that USB protocol equipment is not suitable for fixed voltage output in the prior art is overcome; meanwhile, the design of the external direct-current power supply module is adopted, so that the problems that the power is low and the charger is hot due to high heat production of a power device in the using process are solved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A wireless charger with an external DC power supply is characterized by comprising:
the direct current power supply module is connected to an external direct current power supply circuit and used for processing current input from the outside;
the wireless charging module is electrically connected with the direct-current power supply module and is also provided with a transmitting coil for transmitting the electric energy provided by the direct-current power supply module to an external electric appliance.
The direct current power supply module includes:
the input pin of the power supply chip is connected to the external direct current circuit, and the input current is subjected to voltage reduction processing and then is output to the wireless charging module;
the connection part of the input pin of the power supply chip and the external direct current circuit is grounded through a plurality of input capacitors connected in parallel;
and an output pin of the power supply chip is connected to the input end of the wireless charging module through an output measuring resistor.
2. The wireless charger according to claim 1, wherein two ends of the measuring resistor are further connected to a first output compensation pin and a second output compensation pin of the power chip, respectively.
3. The wireless charger of claim 1, wherein the wireless charging module comprises:
the charging management chip is connected to the direct-current power supply module and sends a control signal to the direct-current power supply module;
the control signal is a feedback signal, and/or a pulse width modulation signal, and/or a bus signal.
The current detection circuit is connected to the charging management chip and is used for generating a current signal;
the voltage detection circuit is connected to the charging management chip and used for generating a voltage signal;
and the temperature detection circuit is connected to the charging management chip and is used for generating a temperature signal according to the temperature of the transmitting coil.
4. The wireless charger according to claim 3, wherein the charging management chip determines whether the current is greater than a preset overcurrent limit according to the current signal, and selects whether to stop charging according to a current determination result;
the charging management chip judges whether the voltage is greater than a preset overvoltage limit value according to the voltage signal and selects whether to stop charging according to a voltage judgment result;
and the charging management chip judges whether the temperature of the transmitting coil is greater than a preset over-temperature limit value according to the temperature signal and gradually reduces charging power according to a temperature judgment result.
5. The wireless charger of claim 3, wherein the wireless charging module further comprises:
the full-bridge driving circuit is connected with the charging management chip and the direct-current power supply module;
one end of the resonant capacitor is connected with the output end of the full-bridge driving circuit, and the other end of the resonant capacitor is connected to the transmitting coil;
and the LED indicating circuit is connected with the charging management chip and is used for sending a reminding signal or an alarm signal.
6. The wireless charger according to claim 5, wherein a first detection point is provided at a connection point of the resonant capacitor and the transmitting coil, and the first detection point is connected with:
the output end of the quality factor detection circuit is connected to the charging management chip and is used for detecting whether the external electric appliance is a receiving end which accords with the charging standard;
and the output end of the decoding circuit is connected to the charging management chip and is used for receiving the charging information sent by the external electrical appliance.
7. A charging method of a wireless charger, which is applied to the wireless charger of any one of claims 1-6, wherein a charging management chip of the wireless charger continuously transmits a detection signal to the outside through a transmitting coil at predetermined time intervals and receives a return signal through a quality factor detection circuit;
the method specifically comprises the following steps:
step S1: judging whether the return signal has change or not;
if yes, go to step S2;
if not, returning to the step S1;
step S2: sending a pairing signal to an external electric appliance;
step S3: judging whether the external electrical appliance returns charging information or not;
if yes, go to step S4;
if not, returning to the step S1;
step S4: adjusting a full-bridge driving circuit to drive the transmitting coil according to the charging information;
step S5: judging whether a fault exists according to the current signal and the voltage signal;
if yes, finishing charging and sending an alarm signal;
if not, go to step S6;
step S6: judging whether the charging temperature is too high according to the temperature signal;
if yes, go to step S7;
if not, go to step S8;
step S7: sending a control signal to a direct current power supply module to reduce the output power of the direct current power supply module;
step S8: receiving the charging information again, and judging whether to finish charging;
if yes, finishing charging and sending out a reminding signal;
if not, the process returns to the step S4.
8. The charging method according to claim 7, wherein the step S5 includes:
step S51: judging whether the current is larger than a preset overcurrent limit value or not according to the current signal;
if yes, finishing charging and sending an alarm signal;
if not, go to step S52;
step S52: judging whether the voltage is greater than a preset overvoltage limit value or not according to the voltage signal;
if yes, finishing charging and sending an alarm signal;
if not, the process goes to step S6.
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| CN202110957099.4A CN113725966A (en) | 2021-08-19 | 2021-08-19 | Wireless charger with external direct-current power supply and charging method |
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| CN202110957099.4A CN113725966A (en) | 2021-08-19 | 2021-08-19 | Wireless charger with external direct-current power supply and charging method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114844152A (en) * | 2022-05-10 | 2022-08-02 | 湖南炬神电子有限公司 | Wireless charger with annular breathing lamp effect |
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