CN112350456A - Intelligent wireless charging circuit and system - Google Patents
Intelligent wireless charging circuit and system Download PDFInfo
- Publication number
- CN112350456A CN112350456A CN202011021291.4A CN202011021291A CN112350456A CN 112350456 A CN112350456 A CN 112350456A CN 202011021291 A CN202011021291 A CN 202011021291A CN 112350456 A CN112350456 A CN 112350456A
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- circuit
- transistor
- wireless charging
- diode
- intelligent wireless
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- 230000006698 induction Effects 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims abstract description 18
- 230000005669 field effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- 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
- H02J50/001—Energy harvesting or scavenging
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- 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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an intelligent wireless charging circuit and system. The resonance frequency of the front-end induction circuit is adjusted and received through the adjustable capacitor, and the front end is received through active induction, so that the induction intensity of resonance point resonance is enhanced, the receiving sensitivity of weak signals is improved, and the front-end induction circuit is suitable for working in a long-distance or severe environment with strong blocking property.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to an intelligent wireless charging circuit and system.
Background
Wireless power transmission, also known as contactless power transmission, is a technique for energy transfer by means of electromagnetic fields or waves. According to different power transmission principles, wireless power transmission is divided into an electromagnetic induction type, an electromagnetic resonance type and an electromagnetic radiation type; the electromagnetic induction type is mature, and because the technology is high in maturity and low in development difficulty, corresponding application products are more.
In modern life, portable devices such as mobile phones, notebook computers, cameras, video cameras, etc. use rechargeable batteries, but must be recharged through a power converter, a charger, a computer USB port, etc. In the process of using the mobile terminal, due to the limitation of the battery capacity, the battery capacity is quickly exhausted, for example, the battery of the mobile phone with the android system, which is currently strongly sought by users, has relatively poor cruising ability and needs to be frequently charged, so that a standby battery or a wired charger needs to be frequently carried. Many mobile terminals need to carry a wired charger to charge the battery, and the wired charger is cumbersome due to the fact that the wired charger is provided with wires, and even more, different mobile terminals often need specific chargers of different models to charge, so that many users such as business people often need to carry chargers of mobile terminals such as mobile phones, computers, shavers and the like, and the various complicated wired chargers bring great inconvenience to the use of consumers. The chargers used by the devices are different, and the power socket form, the device socket form, the voltage level and the current capacity are different greatly, so that each device is usually provided with a special power converter, which not only generates great waste and pollution, but also does not fundamentally solve the problem of convenient and timely charging of the devices. Therefore, the wireless charging alliance has brought forward a good prospect that people can conveniently and quickly charge the wireless charging transmitting device without searching for sockets and wires around.
However, no active wireless charging device suitable for long distance or severe environment with strong blocking property is available in the market at present.
Disclosure of Invention
The invention provides an intelligent wireless charging circuit and system aiming at the defects of the prior art, and solves the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides an intelligent wireless charging circuit, including: (ii) a
A rechargeable battery;
the induction circuit is used for receiving radio frequency signals and converting the radio frequency signals into induction current;
the rectifying circuit is used for converting the induced current into alternating current and direct current so as to obtain direct current voltage;
the induction circuit is an active induction circuit, and the induction circuit, the rectification circuit and the rechargeable battery are electrically connected in sequence.
Preferably, the sensing circuit comprises: an inductor, a transistor and two capacitors;
a first inductor (L1) and a first capacitor (C1) which are connected in series are connected between the base and the emitter of the first transistor (Q1), and a second capacitor (C2) is connected between the base and the collector of the first transistor (Q1).
Preferably, the second capacitor (C2) is an adjustable capacitor for adjusting a resonant frequency of the induction circuit for receiving the radio frequency signal.
Preferably, the rectifier circuit includes: four symmetric diodes;
the series forward connected first diode (D1) is connected in parallel with the third diode (D3) and the series forward connected second diode (D2) is connected in parallel with the fourth diode (D4);
the cathode of the first diode (D1) is connected to the base of the sensing circuit first transistor (Q1), and the cathode of the second diode (D2) is connected to the collector of the sensing circuit first transistor (Q1);
the anode of the first diode (D1) and the anode of the second diode (D2) are respectively connected to the positive and negative terminals of the rechargeable battery.
Preferably, the transistor adopts one or more of a field effect transistor and a bipolar transistor.
Preferably, the first transistor (Q1) is an NMOS transistor.
In a second aspect, the present invention provides an intelligent wireless charging system, including the intelligent wireless charging circuit of the first aspect.
The invention has the beneficial effects that: according to the intelligent wireless charging circuit and system, the frequency of the received radio frequency signal is adjusted through the adjustable capacitor, and the active induction receiving front end is adopted, so that the induction intensity of resonance point resonance is enhanced, the receiving sensitivity of weak signals is improved, and the intelligent wireless charging circuit and system are suitable for working in a long distance or a severe environment with strong blocking property.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of an intelligent wireless charging circuit according to the present invention.
Fig. 2 is a schematic circuit diagram of an intelligent wireless charging circuit according to an embodiment of the invention.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments, which are preferred embodiments of the present invention. It is to be understood that the described embodiments are merely a subset of the embodiments of the invention, and not all embodiments; it should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the present invention are used, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
The invention provides an intelligent wireless charging circuit, as shown in fig. 1, the intelligent wireless charging circuit may specifically include the following modules: the induction circuit, the rectifying circuit and the rechargeable battery are electrically connected in sequence. The induction circuit is used for receiving radio frequency signals and converting the radio frequency signals into induction current; and the rectifying circuit is used for converting the induced current into alternating current and direct current so as to obtain direct current voltage. It is to be noted that the sensing circuit in the embodiment of the present invention is an active sensing circuit.
In an embodiment of the present invention, the sensing circuit includes: an inductor, a transistor and two capacitors; a first inductor (L1) and a first capacitor (C1) which are connected in series are connected between the base and the emitter of the first transistor (Q1), and a second capacitor (C2) is connected between the base and the collector of the first transistor (Q1).
It should be noted that the second capacitor (C2) is an adjustable capacitor for adjusting a resonant frequency of the sensing circuit receiving the rf signal.
In an embodiment of the present invention, the rectifier circuit includes: four symmetrical diodes, namely the four symmetrical diodes have the same mechanism and the same area; the series forward connected first diode (D1) is connected in parallel with the third diode (D3) and the series forward connected second diode (D2) is connected in parallel with the fourth diode (D4); a cathode of the first diode (D1) is connected to a base of the first transistor (Q1) of the sensing circuit, and a cathode of the second diode (D2) is connected to a collector of the first transistor (Q1) of the sensing circuit; the anode of the first diode (D1) and the anode of the second diode (D2) are connected to positive and negative terminals of the rechargeable battery, respectively.
Note that the transistor in this embodiment may be one or more of a field effect transistor and a bipolar transistor. Preferably, the first transistor (Q1) in this embodiment is an NMOS transistor. Note that the transistor in this embodiment may have a structure in which the gate and the source of the depletion N-channel MOS transistor are connected, but it is needless to say that the transistor may have a structure in which the gate and the source of the depletion P-channel MOS transistor are connected, although not illustrated.
The working principle and the effect of the intelligent wireless charging circuit are as follows: the three-point induction circuit receives an external radio frequency signal through a resonance principle, and carries out alternating current rectification through the rectification circuit to obtain direct current voltage so as to provide direct current energy for the rechargeable battery. Therefore, the resonance frequency of the front-end induction circuit is adjusted through the adjustable capacitor, and the front end is received through active induction, so that the induction intensity of resonance point resonance is enhanced, the receiving sensitivity of weak signals is improved, and the front-end induction circuit is suitable for working in a long-distance or severe environment with strong blocking property.
Example two
An embodiment of the present invention provides an intelligent wireless charging system, including the above-mentioned intelligent wireless charging circuit.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Moreover, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
It should also be noted that in the description herein, references to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. An intelligent wireless charging circuit, the charging circuit comprising: (ii) a
A rechargeable battery;
the induction circuit is used for receiving radio frequency signals and converting the radio frequency signals into induction current;
the rectifying circuit is used for converting the induced current into alternating current and direct current so as to obtain direct current voltage;
the induction circuit is an active induction circuit, and the induction circuit, the rectification circuit and the rechargeable battery are electrically connected in sequence.
2. The intelligent wireless charging circuit of claim 1, wherein the sensing circuit comprises: an inductor, a transistor and two capacitors;
a first inductor (L1) and a first capacitor (C1) which are connected in series are connected between the base and the emitter of the first transistor (Q1), and a second capacitor (C2) is connected between the base and the collector of the first transistor (Q1).
3. The intelligent wireless charging circuit according to claim 2, wherein the second capacitor (C2) is an adjustable capacitor for adjusting a resonant frequency of the induction circuit for receiving the radio frequency signal.
4. The intelligent wireless charging circuit of claim 1, wherein the rectifier circuit comprises: four symmetric diodes;
the series forward connected first diode (D1) is connected in parallel with the third diode (D3) and the series forward connected second diode (D2) is connected in parallel with the fourth diode (D4);
the cathode of the first diode (D1) is connected to the base of the sensing circuit first transistor (Q1), and the cathode of the second diode (D2) is connected to the collector of the sensing circuit first transistor (Q1);
the anode of the first diode (D1) and the anode of the second diode (D2) are respectively connected to the positive and negative terminals of the rechargeable battery.
5. The intelligent wireless charging circuit according to any one of claims 2-4, wherein the transistor is one or more of a field effect transistor and a bipolar transistor.
6. The intelligent wireless charging circuit according to claim 5, wherein the first transistor (Q1) is an NMOS transistor.
7. An intelligent wireless charging system, comprising the intelligent wireless charging circuit of any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021291.4A CN112350456A (en) | 2020-09-25 | 2020-09-25 | Intelligent wireless charging circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021291.4A CN112350456A (en) | 2020-09-25 | 2020-09-25 | Intelligent wireless charging circuit and system |
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| Publication Number | Publication Date |
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| CN112350456A true CN112350456A (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011021291.4A Pending CN112350456A (en) | 2020-09-25 | 2020-09-25 | Intelligent wireless charging circuit and system |
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| CN (1) | CN112350456A (en) |
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2020
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|---|---|---|---|---|
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| CN201188555Y (en) * | 2008-03-24 | 2009-01-28 | 昆盈企业股份有限公司 | Magnetoelectric induction converting system for wireless input apparatus |
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Application publication date: 20210209 |