CN216216099U - Wireless charging circuit - Google Patents
Wireless charging circuit Download PDFInfo
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- CN216216099U CN216216099U CN202122733345.6U CN202122733345U CN216216099U CN 216216099 U CN216216099 U CN 216216099U CN 202122733345 U CN202122733345 U CN 202122733345U CN 216216099 U CN216216099 U CN 216216099U
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Abstract
The utility model discloses a wireless charging circuit which comprises a power input module, a power switch connected with the output end of the power input module, and a control chip connected with the output end of the power switch, wherein the output end of the control chip is connected with an overload protection module, the output end of the overload protection module is connected with a current limiting module, the output end of the current limiting module is connected with a relay, and the output end of the relay is connected with a change-over switch. The relay that this wireless charging circuit set up is connected with voltage control circuit through change over switch, and the boost circuit through voltage control circuit or step-down circuit control supply voltage size to through triode electronic rectifier and voltage stabilizing module stabilization supply voltage's stability, and get rid of interference signal through the wave filter, make power supply increase or reduce supply voltage through the cooperation of one-level transmitting coil and secondary transmitting coil.
Description
Technical Field
The utility model relates to the technical field of wireless charging circuits, in particular to a wireless charging circuit.
Background
The wireless charging technology is derived from a wireless power transmission technology and can be divided into a low-power wireless charging mode and a high-power wireless charging mode. The low-power wireless charging is usually performed by an electromagnetic induction type, such as Qi charging for mobile phones, but the popular wireless charging for electric vehicles is performed by an induction type. 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. Because the charger and the electric device transmit energy by magnetic field, the charger and the electric device are not connected by electric wires, so that no conductive contact is exposed.
The existing wireless charging circuit is easily interfered by external information, so that the charging process is prolonged or interrupted, the load of the wireless charging circuit is easily exceeded, and the wireless charging circuit or the charging equipment is damaged.
SUMMERY OF THE UTILITY MODEL
The present invention provides a wireless charging circuit, so as to solve the problems that the existing wireless charging circuit in the background art is easily interfered by external information, which causes the charging process to be prolonged or interrupted, and the load of the wireless charging circuit is easily exceeded, which causes the wireless charging circuit or the charging device to be damaged.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a wireless charging circuit, includes power input module, the switch who is connected with power input module output to and be connected with control chip with the switch output, control chip's output is connected with overload protection module, overload protection module's output is connected with current limiting module, current limiting module's output is connected with the relay, the output of relay is connected with change over switch.
Preferably, the output end of the control chip is further connected with a charging state indicator lamp, and the charging state indicator lamp is composed of three red, yellow and green ND-DS indicator lamps.
Preferably, the overload protection module is mainly composed of a capacitor and a resistor which are connected in parallel to the positive power supply VDD end of the control chip.
Preferably, the current limiting module mainly comprises a current limiting protection resistor.
Preferably, the output end of the change-over switch is connected with a primary transmitting coil.
Preferably, the output end of the change-over switch is further connected with a voltage control circuit, the output end of the voltage control circuit is connected with a triode electronic rectifier, the output end of the triode electronic rectifier is connected with a voltage stabilizing module, the output end of the voltage stabilizing module is connected with a filter, and the output end of the filter is connected with a secondary transmitting coil.
Preferably, the voltage control circuit is composed of a voltage boost circuit and a voltage reduction circuit.
Preferably, the voltage stabilizing module is mainly composed of a plurality of voltage stabilizing diodes which are connected in series.
Preferably, the receiving coil can be selected to be used in one or two of the two ways of magnetic coupling with the primary transmitting coil or the primary transmitting coil and the secondary transmitting coil.
Preferably, the output end of the receiving coil is connected with a voltage sampling module, the output end of the voltage sampling module is connected with a rechargeable battery, and the voltage sampling module can be used for collecting the charging voltage capacity of the rechargeable battery.
Compared with the prior art, the utility model has the following beneficial effects:
the charging state of the user can be prompted through the indicating lamps with three colors of the charging state indicating lamp, and the current state of the charging circuit is fed back to the user for judging whether the charging is abnormal or not;
the overload protection module can effectively prevent the circuit from being overloaded, and avoid the damage of the charging equipment or the occurrence of fire; the current limiting module can be used for limiting the current of the charging circuit, avoiding the electric elements connected in series in the circuit from being burnt out due to overlarge current and playing a role in voltage division;
the power supply can be connected with the primary transmitting coil, and the primary transmitting coil is matched with the receiving coil to generate power supply voltage, so that the charging function is realized; the relay is connected with the voltage control circuit through the change-over switch, the power supply voltage is controlled through a voltage boosting circuit or a voltage reducing circuit of the voltage control circuit, the power supply voltage is stabilized through the triode electronic rectifier and the voltage stabilizing module, and interference signals are removed through the filter, so that the power supply voltage is increased or reduced through the matching of the primary transmitting coil and the secondary transmitting coil;
the utility model can collect the charging voltage and the charging capacity of the rechargeable battery through the voltage sampling module, feed back the data to the control chip, and control whether the power switch cuts off the power supply through the control chip.
Drawings
Fig. 1 is a schematic front view of the present invention.
In the figure: 1. a power input module; 2. a power switch; 3. a control chip; 4. a charge status indicator light; 5. an overload protection module; 6. a current limiting module; 7. a relay; 8. a switch; 9. a primary transmitting coil; 10. a voltage control circuit; 11. a triode electronic rectifier; 12. a voltage stabilization module; 13. a filter; 14. a secondary transmitting coil; 15. a receiving coil; 16. and a voltage sampling module.
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.
As shown in fig. 1, the present invention provides a technical solution: a wireless charging circuit comprises a power input module 1, a power switch 2 connected with the output end of the power input module 1, and a control chip 3 connected with the output end of the power switch 2, the output end of the control chip 3 is also connected with a charging state indicator lamp 4, the charging state indicator lamp 4 is composed of three red, yellow and green ND16-22DS indicator lamps, the charging state of a user can be prompted through the indicator lamps with three colors of the charging state indicator lamp 4, the current state of the charging circuit is fed back to the user for judging whether the charging is abnormal, the output end of the control chip 3 is connected with an overload protection module 5, the overload protection module 5 is mainly composed of a power supply anode VDD end connected with the control chip 3 in parallel by a capacitor and a resistor, the overload protection module 5 can effectively prevent the circuit from overloading, and avoid the damage or the fire of a charging device, the output of overload protection module 5 is connected with current limiting module 6, and current limiting module 6 mainly comprises current-limiting protection resistance, and current limiting module 6 can be used to limit the size of charging circuit electric current, avoids the too big electric element that burns out the circuit series connection of electric current, still can play the effect of partial pressure, and current limiting module 6's output is connected with relay 7, and relay 7's output is connected with change over switch 8.
Example two
The scheme in the first embodiment is further described in the following with reference to specific working modes, which are described in detail in the following:
as shown in fig. 1, as a preferred embodiment, in addition to the above-mentioned modes, a wireless charging circuit further includes a receiving coil 15, the receiving coil 15 can be selectively used in one or two of two magnetic coupling modes of the primary transmitting coil 9 and the secondary transmitting coil 14, the output end of the switch 8 is connected with the primary transmitting coil 9, a power supply can be connected with the primary transmitting coil 9, and the primary transmitting coil 9 is matched with the receiving coil 15 to generate a supply voltage, so as to implement a charging function.
As shown in fig. 1, as a preferred embodiment, on the basis of the above-mentioned manner, further, the output end of the switch 8 is further connected with a voltage control circuit 10, the voltage control circuit 10 is composed of a voltage boost circuit and a voltage buck circuit, the output end of the voltage control circuit 10 is connected with a triode electronic rectifier 11, the output end of the triode electronic rectifier 11 is connected with a voltage stabilizing module 12, the voltage stabilizing module 12 is mainly composed of a plurality of voltage stabilizing diodes connected in series, the output end of the voltage stabilizing module 12 is connected with a filter 13, the output end of the filter 13 is connected with a secondary transmitting coil 14, the relay 7 is connected with the voltage control circuit 10 through the switch 8, the magnitude of the power supply voltage is controlled through the voltage boost circuit or the voltage buck circuit of the voltage control circuit 10, the stability of the power supply voltage is stabilized through the triode electronic rectifier 11 and the voltage stabilizing module 12, and the interference signal is removed through the filter 13, so that the power supply increases or decreases the power supply voltage through the cooperation of the primary transmitting coil 9 and the secondary transmitting coil 14.
As shown in fig. 1, as a preferred embodiment, in addition to the above-mentioned mode, a voltage sampling module 16 is connected to an output end of the receiving coil 15, a rechargeable battery is connected to an output end of the voltage sampling module 16, the voltage sampling module 16 can be used for collecting the charging voltage capacity of the rechargeable battery, collecting the charging voltage through the voltage sampling module 16, and the charging capacity of the rechargeable battery, and feeding data back to the control chip 3, and controlling whether the power switch 2 cuts off the power supply through the control chip 3.
The working principle of the wireless charging circuit is as follows: firstly, a power input module 1 can supply power to a control chip 3 and an electric element of a charging circuit through a power switch 2, provides charging voltage, prevents the circuit from being overloaded through an overload protection module 5, limits the current of the charging circuit through a current limiting module 6, then controls a change-over switch 8 through a relay 7 to select one or two of two magnetic coupling modes of a primary transmitting coil 9 and a secondary transmitting coil 9 or three magnetic coupling modes of the primary transmitting coil 9 and a secondary transmitting coil 14, and if the primary transmitting coil 9 and a receiving coil 15 are selected to be magnetically coupled, the charging circuit directly supplies power; if the primary transmitting coil 9 and the secondary transmitting coil 14 are selected to be magnetically coupled with the receiving coil 15, the relay 7 is connected with the voltage control circuit 10 through the switch 8, the power supply voltage is controlled through a boosting circuit or a voltage reducing circuit of the voltage control circuit 10, the power supply voltage is stabilized through the triode electronic rectifier 11 and the voltage stabilizing module 12, interference signals are removed through the filter 13, the power supply increases or reduces the power supply voltage through the matching of the primary transmitting coil 9 and the secondary transmitting coil 14, the charging state of a user can be prompted through the indicator lights with three colors of the charging state indicator light 4, and the current state of the charging circuit is fed back to the user to judge whether the charging is abnormal.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a wireless charging circuit, includes power input module (1), switch (2) of being connected with power input module (1) output to and be connected with control chip (3), its characterized in that with switch (2) output: the output of control chip (3) is connected with overload protection module (5), the output of overload protection module (5) is connected with current limiting module (6), the output of current limiting module (6) is connected with relay (7), the output of relay (7) is connected with change over switch (8).
2. The wireless charging circuit of claim 1, wherein: the output end of the control chip (3) is also connected with a charging state indicator lamp (4), and the charging state indicator lamp (4) is composed of three red, yellow and green ND16-22DS indicator lamps.
3. The wireless charging circuit of claim 1, wherein: the overload protection module (5) is mainly composed of a power supply anode VDD end connected with the control chip (3) in parallel through a capacitor and a resistor.
4. The wireless charging circuit of claim 1, wherein: the current limiting module (6) mainly comprises a current limiting protection resistor.
5. The wireless charging circuit of claim 1, wherein: the output end of the change-over switch (8) is connected with a primary transmitting coil (9).
6. The wireless charging circuit of claim 1, wherein: the output end of the change-over switch (8) is further connected with a voltage control circuit (10), the output end of the voltage control circuit (10) is connected with a triode electronic rectifier (11), the output end of the triode electronic rectifier (11) is connected with a voltage stabilizing module (12), the output end of the voltage stabilizing module (12) is connected with a filter (13), and the output end of the filter (13) is connected with a secondary transmitting coil (14).
7. The wireless charging circuit of claim 6, wherein: the voltage control circuit (10) is composed of a booster circuit and a voltage reduction circuit.
8. The wireless charging circuit of claim 6, wherein: the voltage stabilizing module (12) is mainly formed by connecting a plurality of voltage stabilizing diodes in series.
9. A wireless charging circuit according to claim 5 or 6, further comprising a receiving coil (15), wherein the receiving coil (15) is selectively magnetically coupled to both the primary transmitting coil (9) or both the primary transmitting coil (9) and the secondary transmitting coil (14).
10. The wireless charging circuit of claim 9, wherein: the output of receiving coil (15) is connected with voltage sampling module (16), the output of voltage sampling module (16) is connected with rechargeable battery, voltage sampling module (16) can be used to gather rechargeable battery's charging voltage capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122733345.6U CN216216099U (en) | 2021-11-09 | 2021-11-09 | Wireless charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122733345.6U CN216216099U (en) | 2021-11-09 | 2021-11-09 | Wireless charging circuit |
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| CN216216099U true CN216216099U (en) | 2022-04-05 |
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| CN202122733345.6U Active CN216216099U (en) | 2021-11-09 | 2021-11-09 | Wireless charging circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116846028A (en) * | 2022-07-05 | 2023-10-03 | 深圳市好斯美科技有限公司 | Automatic startup control method for judging intervention mutual inductance of wireless receiving equipment |
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2021
- 2021-11-09 CN CN202122733345.6U patent/CN216216099U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116846028A (en) * | 2022-07-05 | 2023-10-03 | 深圳市好斯美科技有限公司 | Automatic startup control method for judging intervention mutual inductance of wireless receiving equipment |
| CN116846028B (en) * | 2022-07-05 | 2024-05-28 | 深圳市好斯美科技有限公司 | Automatic startup control method for judging intervention mutual inductance of wireless receiving equipment |
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