CN203933167U - Wireless charging receiving circuit and portable chargeable equipment - Google Patents
Wireless charging receiving circuit and portable chargeable equipment Download PDFInfo
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- CN203933167U CN203933167U CN201420322804.9U CN201420322804U CN203933167U CN 203933167 U CN203933167 U CN 203933167U CN 201420322804 U CN201420322804 U CN 201420322804U CN 203933167 U CN203933167 U CN 203933167U
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Abstract
The utility model relates to a wireless charging technology, concretely relates to wireless charging receiving circuit and portable chargeable equipment, wherein, wireless charging receiving circuit is applied to portable chargeable equipment, charges for energy storage element, and this circuit includes induction coil, rectification filter module, voltage division module, control module and switch module, and the induction coil that receives the electromagnetic wave produces the induction energy, and this electric energy produces DC power supply through the rectification filter module rectification filter; the voltage division module divides the direct current power supply to generate a reference voltage; the output end of the switch module charges the energy storage element; the control module detects the reference voltage and the voltage of the energy storage element and compares the reference voltage and the voltage of the energy storage element, when the reference voltage is larger than the voltage of the energy storage element, the control module controls the switch module to be switched on, and otherwise, the switch module is switched off. Through set up above-mentioned wireless receiving circuit that charges on portable chargeable equipment, can provide the wireless charging of electromagnetic wave form for this equipment, provide convenience in the life at home, save socket resource more.
Description
Technical Field
The utility model relates to a wireless charging technology especially relates to a wireless receiving circuit and portable chargeable equipment that charges.
Background
Household appliance remote controllers and shavers are used as electric equipment, and at present, most of the household appliance remote controllers and shavers provide direct-current power supplies through zinc-manganese batteries, so that when the electric quantity of the batteries is exhausted, the zinc-manganese batteries seriously pollute the environment after being discarded. Replacing the batteries adds additional expense to the consumer.
The rechargeable battery is used for providing direct current power supply for a remote controller, a mobile phone, a shaver and the like of household appliances, when the electric quantity of the battery is exhausted, the rechargeable battery is usually connected with a wired charger for charging, and although the wired charger has portability, the wired charger is easy to break and often needs to occupy a direct current power supply socket, and various problems of inconvenient use and the like caused by wired connection exist.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need for a reliable, convenient, and socket resource-saving wireless charging receiving circuit applicable to portable and rechargeable devices.
A wireless charging receiving circuit is applied to portable chargeable equipment and used for charging an energy storage element, and comprises an induction coil, a rectification filtering module, a voltage division module, a control module and a switch module, wherein the induction coil used for receiving electromagnetic waves generates induction electric energy, and the electric energy is rectified and filtered by the rectification filtering module to generate a direct-current power supply; the voltage division module is connected between the output end of the rectification filter module and the ground and divides the direct-current power supply to generate a reference voltage; the input end of the switch module is connected with the direct-current power supply, the output end of the switch module charges the energy storage element, and the control end of the switch module is controlled by the control module; the control module detects the reference voltage and the voltage of the energy storage element and compares the reference voltage and the voltage of the energy storage element, and controls the switch module to be switched on when the reference voltage is greater than the voltage of the energy storage element, and otherwise, the switch module is switched off.
Further, the voltage division module comprises a reference power supply chip, a first resistor, a second resistor and a third resistor, wherein:
the anode of the reference power supply chip is grounded, the cathode of the reference power supply chip is connected with the output end of the rectification filter module through the first resistor and is connected with the reference electrode of the reference power supply chip through the second resistor, the third resistor is connected between the reference electrode of the reference power supply chip and the ground, and the cathode of the reference power supply chip generates the reference voltage.
Further, the model of the reference power supply chip is TL431.
Further, the control module comprises a comparator, a positive phase input end of the comparator is connected with the reference voltage, a negative phase input end of the comparator is connected with the energy storage element, and an output end of the comparator is connected with the control end of the switch module.
Further, the switch module includes a first transistor, a second transistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor, wherein,
the first triode is a PNP triode, the second triode is an NPN triode, an emitting electrode of the first triode is used as an input end of the switch module and is connected with the direct-current power supply through a fourth resistor, the emitting electrode of the first triode is connected with a base electrode of the first triode through a fifth resistor, a collecting electrode of the first triode is used as an output end of the switch module and is connected with the energy storage element, and the base electrode of the first triode is connected with a collecting electrode of the second triode through a sixth resistor;
the emitter of the second triode is grounded, the base of the second triode is connected with the first end of the seventh resistor, the base of the second triode is grounded through the eighth resistor, and the second end of the seventh resistor serves as the control end of the switch module.
Further, the energy storage element is a farad capacitor.
Furthermore, the rectification filter module includes a rectifier bridge and a first capacitor, two input ends of the rectifier bridge are respectively connected to two ends of the induction coil, a common anode input end is grounded, a common cathode output end is connected to a first end of the first capacitor and outputs the dc power supply, and a second end of the first capacitor is grounded.
In addition, the portable chargeable device comprises a shell, the wireless charging receiving circuit and the energy storage element, wherein the wireless charging receiving circuit is contained in the shell, and an induction coil of the wireless charging receiving circuit is tightly attached to a back plate of the shell.
Further, the portable chargeable device is a chargeable remote controller, a mobile phone or a chargeable shaver.
The wireless charging receiving circuit is arranged on the portable chargeable equipment, so that wireless charging in an electromagnetic wave form can be provided for the equipment, convenience is provided in home life, socket resources are saved, meanwhile, the problems that an irreversible zinc-manganese battery is used for supplying power, the environment is seriously polluted after being abandoned are solved, and the cost for replacing the battery by a consumer is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a portable rechargeable device according to a preferred embodiment of the present invention;
fig. 2 is a front view of the wireless charging receiving circuit mounted in the portable chargeable device of fig. 1;
fig. 3 is a circuit schematic of a wireless charging receive circuit in the portable chargeable device of fig. 1.
Detailed Description
In order to make the technical problem, technical scheme and the beneficial effect that the utility model discloses solve clearer, it is right to combine figure and embodiment below to go on further the detailed description of the utility model. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, in a portable rechargeable device 10 according to a preferred embodiment of the present invention, the portable rechargeable device 10 is a rechargeable remote controller, a mobile phone or a rechargeable shaver. The portable chargeable device 10 includes a housing 11, a wireless charging receiving circuit 100 and an energy storage element E, wherein the wireless charging receiving circuit 100 is accommodated in the housing 11, and an induction coil L of the wireless charging receiving circuit 100 is tightly attached to a back plate of the housing 11, so that the efficiency of the induction coil L for receiving electromagnetic signals (electromagnetic waves) is higher. The energy storage element E can be a farad capacitor, a lithium battery and the like.
Referring to fig. 3, the wireless charging receiving circuit 100 according to the preferred embodiment of the present invention can be applied to a portable rechargeable device 10 for charging an energy storage element E of the device, and the circuit includes an induction coil L, a rectifying and filtering module 101, a voltage dividing module 102, a control module 103, and a switch module 104.
In application, the induction coil L is opposite to a transmitting coil which generates electromagnetic waves in the wireless charging generation circuit, energy is transmitted in an inductive coupling mode, and the distance between the two coils can reach 5mm and can also be increased to 40mm as required.
The induction coil L receives electromagnetic waves to generate induction electric energy, and the electric energy is rectified and filtered by the rectifying and filtering module 101 to generate a direct current power source vcc. In this embodiment, the rectifying and filtering module 101 includes a rectifier bridge D1 and a first capacitor C1, two input terminals of the rectifier bridge D1 are respectively connected to two ends of the induction coil L, a common anode input terminal of the rectifier bridge D1 is grounded, a common cathode output terminal of the rectifier bridge D1 is connected to a first end of the first capacitor C1 and outputs a dc power vcc, and a second end of the first capacitor C1 is grounded.
The voltage dividing module 102 is connected between the output terminal of the rectifying and filtering module 101 and ground, and divides the dc power vcc to generate a reference voltage Vref. In this embodiment, the voltage dividing module 102 includes a reference power chip U2, a first resistor R1, a second resistor R2, and a third resistor R3.
The anode of the reference power chip U2 is grounded, the cathode of the reference power chip U2 is connected to the output terminal of the rectifying and filtering module 101 through the first resistor R1, the cathode of the reference power chip U2 is connected to the reference electrode of itself through the second resistor R2, the third resistor R3 is connected between the reference electrode of the reference power chip U2 and the ground, and the cathode of the reference power chip U2 is further configured to generate the reference voltage Vref. Preferably, the reference power supply chip U2 has a model number TL431.
The input end of the switch module 104 is connected to the dc power vcc, the output end of the switch module 104 is connected to the positive end of the energy storage element E for charging, the negative end of the energy storage element E is grounded, and the control end of the switch module 104 is controlled by the control module 103. In this embodiment, the switch module 104 includes a first transistor Q1, a second transistor Q2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8.
The first triode Q1 is a PNP type triode, the second triode Q2 is an NPN type triode, an emitting electrode of the first triode Q1 is used as an input end of the switch module 104 and is connected with a direct current power source vcc through a fourth resistor R4, the emitting electrode of the first triode Q1 is connected with a base electrode of the first triode Q1 through a fifth resistor R5, a collecting electrode is used as an output end of the switch module 104 and is connected with the energy storage element E, and the base electrode of the first triode Q1 is connected with a collecting electrode of the second triode Q2 through a sixth resistor R6; an emitter of the second triode Q2 is grounded, a base of the second triode Q2 is connected to the first end of the seventh resistor R7, the base of the second triode Q2 is grounded through the eighth resistor R8, and a second end of the seventh resistor R7 serves as a control end of the switch module 104.
The control module 103 detects and compares the reference voltage Vref and the voltage Vo at the two ends of the energy storage element E, and controls the switch module 104 to be turned on when the reference voltage Vref is greater than the voltage Vo of the energy storage element E, and to be turned off otherwise. In this embodiment, the control module 103 includes a comparator U1, a positive phase input terminal of the comparator U1 is connected to the reference voltage Vref through a ninth resistor R9 and a cathode of the reference power chip U2, an inverse phase input terminal is connected to a positive terminal of the energy storage element E through a tenth resistor R10, the voltage Vo at two ends of the energy storage element EL is connected, and an output terminal is connected to a control terminal of the switch module 104, that is, a second terminal of the seventh resistor R7. The comparator U1 may be model OPA335.
The operation principle of the wireless charging receiving circuit 100 is explained with reference to fig. 3:
the induction coil L receives an electromagnetic signal, the electromagnetic signal is converted into direct-current voltage through the rectifier bridge D1, the first capacitor C1 conducts parallel wave on the direct-current voltage to generate a stable direct-current power source vcc, a reference power source Vref is constructed through the first resistor R1, the second resistor R2, the third resistor R3 and the precision reference power source chip U2, and a reference power source Vref signal is a positive phase input end input signal of the comparator U1 through the ninth resistor R9. Voltage Vo at energy storage element E both ends passes through tenth resistance R10 and is comparator U1's inverting input signal, when reference power Vref > voltage Vo at energy storage element E both ends, comparator U1's output high level, second triode Q2 switches on, the base of first triode Q1 passes through sixth resistance R6 and second triode Q2 ground connection, first triode Q1 switches on, direct current power source vcc passes through fourth resistance R4, first triode Q1 charges towards energy storage element E, wherein fourth resistance R4 plays the guard action to first triode Q1, make and not burn out because of charging current is too big. When the reference power supply Vref is smaller than the voltage Vo at the two ends of the energy storage element E, the output end of the comparator U1 outputs a low level, the second triode Q2 is cut off, the base electrode of the first triode Q1 is connected with a high level through the fifth resistor R5, the first triode Q1 is cut off, and the charging is finished.
By arranging the wireless charging receiving circuit 100 on the portable rechargeable device 10, wireless charging in the form of electromagnetic waves can be provided for the device, convenience is provided in home life, socket resources are saved, meanwhile, the problem that the environment is seriously polluted after the device is abandoned due to the fact that power is supplied by a zinc-manganese battery which is not reusable is solved, and the cost for replacing the battery by a consumer is reduced.
The above-mentioned embodiments only represent some embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A wireless charging receiving circuit is applied to portable chargeable equipment and used for charging an energy storage element, and is characterized by comprising an induction coil, a rectification filter module, a voltage division module, a control module and a switch module, wherein the induction coil used for receiving electromagnetic waves generates induction electric energy which is rectified and filtered by the rectification filter module to generate a direct-current power supply; the voltage division module is connected between the output end of the rectification filter module and the ground and divides the direct-current power supply to generate a reference voltage; the input end of the switch module is connected with the direct-current power supply, the output end of the switch module charges the energy storage element, and the control end of the switch module is controlled by the control module; the control module detects the reference voltage and the voltage of the energy storage element and compares the reference voltage and the voltage of the energy storage element, when the reference voltage is larger than the voltage of the energy storage element, the control module controls the switch module to be switched on, and otherwise, the switch module is switched off.
2. The wireless charging receiving circuit of claim 1, wherein the voltage dividing module comprises a reference power chip, a first resistor, a second resistor, and a third resistor, wherein:
the anode of the reference power supply chip is grounded, the cathode of the reference power supply chip is connected with the output end of the rectification filtering module through the first resistor and is connected with the reference electrode of the reference power supply chip through the second resistor, the third resistor is connected between the reference electrode of the reference power supply chip and the ground, and the cathode of the reference power supply chip generates the reference voltage.
3. The wireless charging receiving circuit of claim 2, wherein the reference power chip has a model number TL431.
4. The wireless charging receiving circuit according to claim 1 or 2, wherein the control module comprises a comparator, a non-inverting input of the comparator is connected to the reference voltage, an inverting input of the comparator is connected to the energy storage element, and an output of the comparator is connected to the control terminal of the switching module.
5. The wireless charging receiver circuit of claim 4, wherein the switch module comprises a first transistor, a second transistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor, wherein,
the first triode is a PNP triode, the second triode is an NPN triode, an emitting electrode of the first triode is used as an input end of the switch module and is connected with the direct-current power supply through a fourth resistor, the emitting electrode of the first triode is connected with a base electrode of the first triode through a fifth resistor, a collecting electrode of the first triode is used as an output end of the switch module and is connected with the energy storage element, and the base electrode of the first triode is connected with a collecting electrode of the second triode through a sixth resistor;
the emitter of the second triode is grounded, the base of the second triode is connected with the first end of the seventh resistor, the base of the second triode is grounded through the eighth resistor, and the second end of the seventh resistor serves as the control end of the switch module.
6. The wireless charging receiving circuit of claim 1, wherein the energy storage element is a farad capacitor.
7. The wireless charging receiving circuit of claim 1, wherein the rectifying and filtering module includes a rectifying bridge and a first capacitor, two input terminals of the rectifying bridge are respectively connected to two ends of the induction coil, a common anode input terminal is grounded, a common cathode output terminal is connected to a first terminal of the first capacitor and outputs the dc power, and a second terminal of the first capacitor is grounded.
8. A portable chargeable device, comprising a housing, and further comprising the wireless charging receiving circuit according to any one of claims 1 to 7 and the energy storage element, wherein the wireless charging receiving circuit is accommodated in the housing, and an induction coil of the wireless charging receiving circuit is tightly attached to a back plate of the housing.
9. The portable, rechargeable device of claim 8 being a rechargeable remote control, a cell phone or a rechargeable shaver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420322804.9U CN203933167U (en) | 2014-06-16 | 2014-06-16 | Wireless charging receiving circuit and portable chargeable equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420322804.9U CN203933167U (en) | 2014-06-16 | 2014-06-16 | Wireless charging receiving circuit and portable chargeable equipment |
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| Publication Number | Publication Date |
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| CN203933167U true CN203933167U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420322804.9U Active CN203933167U (en) | 2014-06-16 | 2014-06-16 | Wireless charging receiving circuit and portable chargeable equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110281787A (en) * | 2019-06-26 | 2019-09-27 | 深圳智链物联科技有限公司 | A kind of wireless charging device and its protection circuit |
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2014
- 2014-06-16 CN CN201420322804.9U patent/CN203933167U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110281787A (en) * | 2019-06-26 | 2019-09-27 | 深圳智链物联科技有限公司 | A kind of wireless charging device and its protection circuit |
| CN110281787B (en) * | 2019-06-26 | 2024-04-12 | 深圳智链物联科技有限公司 | Wireless charging equipment and protection circuit thereof |
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