CN111030270A - Wireless charging circuit adopting shunt method - Google Patents
Wireless charging circuit adopting shunt method Download PDFInfo
- Publication number
- CN111030270A CN111030270A CN201911378280.9A CN201911378280A CN111030270A CN 111030270 A CN111030270 A CN 111030270A CN 201911378280 A CN201911378280 A CN 201911378280A CN 111030270 A CN111030270 A CN 111030270A
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- wireless charging
- circuit
- resistor
- receiving chip
- battery
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- 238000007600 charging Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 101100473585 Arabidopsis thaliana RPP4 gene Proteins 0.000 description 2
- 101150085479 CHS2 gene Proteins 0.000 description 2
- 101100167214 Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139) chsA gene Proteins 0.000 description 2
- 101100377543 Gerbera hybrida 2PS gene Proteins 0.000 description 2
- 101100439693 Ustilago maydis (strain 521 / FGSC 9021) CHS4 gene Proteins 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
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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 a wireless charging circuit adopting a shunt method, wherein an energy input end of a wireless charging receiving chip is connected with a receiving coil, a signal output end of the wireless charging receiving chip is connected with a resistor Rs and then grounded, and the front end of the resistor Rs is connected with a signal input end of a controller and is used for detecting the working state of the wireless charging receiving chip; a battery is connected between the energy output end of the wireless charging receiving chip and the grounding end of the wireless charging receiving chip and is used for charging the battery; a shunt circuit is connected between the energy output end and the grounding end in parallel, and a control switch on the shunt circuit is connected with a signal output end of the controller; and a battery voltage monitoring circuit in the controller is connected between the energy output end of the wireless charging receiving chip and the load grounding end. The invention has reasonable structure, can effectively protect the battery and improve the charging efficiency.
Description
Technical Field
The invention relates to a wireless charging circuit adopting a shunt method, and belongs to the technical field of battery charging management circuits.
Background
The wireless charging technology is derived from the wireless electric energy transmission technology, and the charger and the electric device are connected without wires because the charger and the electric device transmit energy by magnetic fields, so that the charger and the electric device can be exposed without conductive contacts. The wireless charging technology can be divided into a low-power wireless charging mode and a high-power wireless charging mode.
The low-power wireless charging is usually of an electromagnetic induction type, and the wireless charging scheme in the current market is widely applied to Bluetooth earphones, wireless electric toothbrushes, mobile phones and the like. In order to reduce the charging time, some wireless charging schemes provide a charging current of 1C (1000 mAh of battery is charged with 1000mA current is called 1C charging) or higher, and the high rate charging has the advantages of fast charging time and the disadvantages of high requirements on battery quality and safety management.
Therefore, the technology in the field urgently needs to solve the problem that wireless charging is faster in charging on the premise of ensuring the safety of the battery, and is used for bringing better use experience of the electric appliance for users.
Disclosure of Invention
The purpose is as follows: in order to overcome the defects in the prior art, the invention provides a shunt method wireless charging circuit.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a shunt method wireless charging circuit, comprising: the energy input end of the wireless charging receiving chip is connected with the receiving coil, the signal output end of the wireless charging receiving chip is connected with the resistor Rs and then grounded, and the front end of the resistor Rs is connected with the signal input end of the controller and used for detecting the working state of the wireless charging receiving chip; a battery is connected between the energy output end of the wireless charging receiving chip and the grounding end of the wireless charging receiving chip and is used for charging the battery; a shunt circuit is connected between the energy output end and the grounding end in parallel, and a control switch on the shunt circuit is connected with a signal output end of the controller; and a battery voltage monitoring circuit in the controller is connected between the energy output end of the wireless charging receiving chip and the load grounding end.
Preferably, the shunt circuit comprises a resistor Rc1 and a resistor Rc2, the resistor Rc1 is connected in series with the control switch K1, the resistor Rc2 is connected in series with the control switch K2, and both series branches are connected in parallel between the energy output end and the ground end; the control switches K1 and K2 are connected with the signal output end of the controller.
Preferably, the shunt circuit comprises a resistor Rc, the resistor Rc is connected in series with a control switch K1 and then connected in parallel between the energy output terminal and the ground terminal, the control switch K1 is also connected in parallel with a resistor R1 and a series branch of a resistor R2 and a control switch K2 respectively; the control switches K1 and K2 are connected with the signal output end of the controller.
Preferably, the wireless charging receiving chip adopts an SGD5141 chip.
Preferably, the control switches K1 and K2 are NMOS transistors.
Preferably, the control switches K1 and K2 are NPN transistors.
Preferably, the controller includes: the wireless charging receiving chip comprises a signal receiving circuit, a battery voltage monitoring circuit and a switching signal output circuit, wherein the signal receiving circuit is used for detecting the working state of the wireless charging receiving chip; the battery voltage monitoring circuit is used for monitoring the real-time voltage of a charged battery end; the switch signal output circuit is used for turning on and off the control switch according to the real-time voltage condition of the battery.
Has the advantages that: the wireless charging circuit adopting the shunt method provided by the invention adopts a circuit structure that the wireless charging receiving chip is matched with the shunt circuit, so that the charging current of the battery under different voltages can be effectively regulated, and the effective management of battery charging is achieved. This project organization is reasonable, can effectively protect the battery, improves charge efficiency.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic structural diagram of example 2 of the present invention;
fig. 3 is a schematic structural diagram of the controller.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
A shunt method wireless charging circuit, comprising: the energy input end of the wireless charging receiving chip is connected with the receiving coil, the signal output end of the wireless charging receiving chip is connected with the resistor Rs and then grounded, and the front end of the resistor Rs is connected with the signal input end of the controller and used for detecting the working state of the wireless charging receiving chip; a battery is connected between the energy output end of the wireless charging receiving chip and the grounding end of the wireless charging receiving chip and is used for charging the battery; a shunt circuit is connected between the energy output end and the grounding end in parallel, and a control switch on the shunt circuit is connected with a signal output end of the controller; and a battery voltage monitoring circuit in the controller is connected between the energy output end of the wireless charging receiving chip and the load grounding end.
As shown in fig. 1, the shunt circuit includes a resistor Rc1 and a resistor Rc2, the resistor Rc1 is connected in series with the control switch K1, the resistor Rc2 is connected in series with the control switch K2, and both series branches are connected in parallel between the energy output terminal and the ground terminal; the control switches K1 and K2 are connected with the signal output end of the controller.
As shown in fig. 2, the shunt circuit includes a resistor Rc, the resistor Rc is connected in series with the control switch K1 and then connected in parallel between the energy output terminal and the ground terminal, the control switch K1 is further connected in parallel with the resistor R1, and the resistor R2 is connected in parallel with the series branch of the control switch K2; the control switches K1 and K2 are connected with the signal output end of the controller.
The wireless charging receiving chip adopts an SGD5141 chip.
The control switches K1 and K2 adopt NMOS tubes.
The control switches K1 and K2 adopt NPN tubes.
As shown in fig. 3, the controller includes: the wireless charging receiving chip comprises a signal receiving circuit, a battery voltage monitoring circuit and a switching signal output circuit, wherein the signal receiving circuit is used for detecting the working state of the wireless charging receiving chip; the battery voltage monitoring circuit is used for monitoring the real-time voltage of a charged battery end; the switch signal output circuit is used for turning on and off the control switch according to the real-time voltage condition of the battery.
Example 1:
the wireless charging receiving chip adopts an SGD5141 chip, and VCHG pins: the wireless charging coil is externally connected, and the energy of electromagnetic coupling is input into the port; CHS2 pin: IO (input output) of an external LED (light emitting diode) or MCU (micro control unit) and charge state indication; VDD pin: the chip power supply is positive and is connected with the positive end of the rechargeable battery; CM pin: the load GND is internally provided with a switch for lithium battery over-discharge, over-current and short-circuit protection; GND pin: the chip power ground is connected with the negative end of the charged battery. The maximum constant-current charging current is 120mA, and the trickle minimum current is 30 mA; CM is load GND, and is built-in with a switch for protecting lithium battery from over-discharge, over-current and short circuit. The CHS2 can also provide a charging state indication after being externally connected with an LED, and the charging state indication is quickly flashed at 6 Hz: an abnormal state in which discharge overcurrent or short circuit occurs; 1Hz is flickered at a slow speed, and the charging is normal; normally bright: the battery is fully charged and is arranged on the charging seat; and (3) long extinguishing: not on the charging dock.
Example 2:
the SGD5141 chip is set to output a constant current; when the master controller monitors that the battery voltage is smaller than a lower voltage threshold value Vbl or larger than an upper voltage threshold value Vbh and trickle charging is needed, control switches K1 and K2 are closed, a resistor Rc1 and a resistor Rc2 are conducted and shunted, and the system charges the battery with small current;
when the main controller monitors that the battery voltage is larger than Vbl and smaller than Vbh, the control switch K1 or K2 is turned off, the resistor Rc1 or Rc2 does not conduct shunt, and the system charges the battery with larger current.
Example 3:
in the embodiment, a customized 10mAh micro lithium battery is charged, the minimum working current of the SGD5141 chip is 30mA, and the output current of the SGD5141 chip is designed to be 35mA by adjusting the size and the distance of a coil; resistance Rc =90 Ω; resistance R1=48 Ω; resistance R2=400 Ω. When the battery voltage is detected to be less than 2.7V, the control switch K1 is closed, 2.7V/90 Ω =30mA, and the battery charging current is 5 mA.
When the voltage of the battery rises to be larger than 2.7V, the control switch K1 is opened, the control switch K2 is closed, 3.3V/(90 omega +48 omega// 400 omega) =25mA, and the charging current of the battery is 10 mA.
When the battery voltage rises to 4.14V, the control switches K1, K2, 4.15V/(90 Ω +48 Ω) =30mA are opened, and the battery charging current is 5 mA.
The charging is stopped when the completion of the charging is detected.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (7)
1. A shunt method wireless charging circuit, comprising: wireless receiving chip, the controller that charges, its characterized in that: the energy input end of the wireless charging receiving chip is connected with the receiving coil, the signal output end of the wireless charging receiving chip is grounded after being connected with the resistor Rs, and the front end of the resistor Rs is connected with the signal input end of the controller and used for detecting the working state of the wireless charging receiving chip; a battery is connected between the energy output end of the wireless charging receiving chip and the grounding end of the wireless charging receiving chip and is used for charging the battery; a shunt circuit is connected between the energy output end and the grounding end in parallel, and a control switch on the shunt circuit is connected with a signal output end of the controller; and a battery voltage monitoring circuit in the controller is connected between the energy output end of the wireless charging receiving chip and the load grounding end.
2. The wireless charging circuit of claim 1, wherein: the shunt circuit comprises a resistor Rc1 and a resistor Rc2, wherein the resistor Rc1 is connected with a control switch K1 in series, the resistor Rc2 is connected with a control switch K2 in series, and two series branches are connected between an energy output end and a ground end in parallel; the control switches K1 and K2 are connected with the signal output end of the controller.
3. The wireless charging circuit of claim 1, wherein: the shunt circuit comprises a resistor Rc, the resistor Rc is connected in series with a control switch K1 and then connected in parallel between an energy output end and a ground end, the control switch K1 is also connected in parallel with a resistor R1 and a series branch of a resistor R2 and a series branch of a control switch K2 respectively; the control switches K1 and K2 are connected with the signal output end of the controller.
4. The wireless charging circuit of claim 1, wherein: the wireless charging receiving chip adopts an SGD5141 chip.
5. The wireless charging circuit of claim 1, wherein: the control switches K1 and K2 adopt NMOS tubes.
6. The wireless charging circuit of claim 1, wherein: the control switches K1 and K2 adopt NPN tubes.
7. The wireless charging circuit of claim 1, wherein: the controller includes: the wireless charging receiving chip comprises a signal receiving circuit, a battery voltage monitoring circuit and a switching signal output circuit, wherein the signal receiving circuit is used for detecting the working state of the wireless charging receiving chip; the battery voltage monitoring circuit is used for monitoring the real-time voltage of a charged battery end; the switch signal output circuit is used for turning on and off the control switch according to the real-time voltage condition of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911378280.9A CN111030270A (en) | 2019-12-27 | 2019-12-27 | Wireless charging circuit adopting shunt method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911378280.9A CN111030270A (en) | 2019-12-27 | 2019-12-27 | Wireless charging circuit adopting shunt method |
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| CN111030270A true CN111030270A (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911378280.9A Pending CN111030270A (en) | 2019-12-27 | 2019-12-27 | Wireless charging circuit adopting shunt method |
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| CN (1) | CN111030270A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934444A (en) * | 2020-08-12 | 2020-11-13 | 安洁无线科技（苏州）有限公司 | Wireless charging protection system and method |
| CN113162196A (en) * | 2021-05-12 | 2021-07-23 | 西安易朴通讯技术有限公司 | Device for protecting battery, control method, wearable device and storage medium |
| CN114865754A (en) * | 2022-07-06 | 2022-08-05 | 荣耀终端有限公司 | Charging circuit, charging chip and electronic equipment |
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| CN211351802U (en) * | 2019-12-27 | 2020-08-25 | 江苏艾伦摩尔微电子科技有限公司 | Wireless charging circuit adopting shunt method |
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2019
- 2019-12-27 CN CN201911378280.9A patent/CN111030270A/en active Pending
Patent Citations (6)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934444A (en) * | 2020-08-12 | 2020-11-13 | 安洁无线科技（苏州）有限公司 | Wireless charging protection system and method |
| CN113162196A (en) * | 2021-05-12 | 2021-07-23 | 西安易朴通讯技术有限公司 | Device for protecting battery, control method, wearable device and storage medium |
| CN113162196B (en) * | 2021-05-12 | 2024-07-02 | 西安易朴通讯技术有限公司 | Device for protecting battery, control method, wearable device, and storage medium |
| CN114865754A (en) * | 2022-07-06 | 2022-08-05 | 荣耀终端有限公司 | Charging circuit, charging chip and electronic equipment |
| CN114865754B (en) * | 2022-07-06 | 2022-11-25 | 荣耀终端有限公司 | Charging circuit, charging chip and electronic equipment |
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Effective date of registration: 20210415 Address after: Room 295, block B, science and technology innovation center, 128 Shuanglian Road, Haining Economic Development Zone, Haining City, Jiaxing City, Zhejiang Province Applicant after: Heining Bernstein Biotechnology Co.,Ltd. Address before: 215347 no.1699, Zuchongzhi South Road, Kunshan City, Suzhou City, Jiangsu Province Applicant before: JIANGSU ALLENMOORE MICROELECTRONICS Co.,Ltd. |
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