CN218498883U

CN218498883U - Wireless charging bin and wireless charging system

Info

Publication number: CN218498883U
Application number: CN202222960166.0U
Authority: CN
Inventors: 何世友; 李海廷; 房俊恺
Original assignee: Shenzhen Baseus Technology Co Ltd
Current assignee: Shenzhen Baseus Technology Co Ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-02-17
Anticipated expiration: 2032-11-07

Abstract

The utility model relates to the technical field of wireless charging, and provides a wireless charging bin and a wireless charging system, wherein the wireless charging bin comprises a charging interface, a battery management circuit, an energy storage battery, a switching circuit, a booster circuit and a wireless transmitting circuit; the switching circuit is respectively connected with the charging interface, the energy storage battery and the booster circuit, the booster circuit is connected with the wireless transmitting circuit, and the battery management circuit is respectively connected with the charging interface and the energy storage battery; the wireless charging bin transmits the electric energy to the capacitance pen in a wireless mode, so that the capacitance pen receives the electric energy and charges the electric energy. The wireless charging device can wirelessly charge the capacitance pen for multiple times, and can meet the mobile portability of users in the process of using the capacitance pen.

Description

Wireless charging bin and wireless charging system

Technical Field

The utility model relates to a wireless charging technology field particularly, relates to a wireless storehouse and wireless charging system of charging.

Background

The existing wireless charging bin is directly charged by TYPE-C lines, the wireless charging bin needs to be operated with the lines, the charging time is limited, and the TYPE-C interface is inserted again for charging when the electric quantity is used up and then used again, so that the charging is very inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wireless charging storehouse and wireless charging system.

The utility model provides a technical scheme:

in a first aspect, the present invention provides a wireless charging bin, which includes a charging interface, a battery management circuit, an energy storage battery, a switching circuit, a voltage boosting circuit, and a wireless transmitting circuit;

the switching circuit is respectively connected with the charging interface, the energy storage battery and the booster circuit, the booster circuit is connected with the wireless transmitting circuit, and the battery management circuit is respectively connected with the charging interface and the energy storage battery;

the wireless charging bin is used for sending electric energy to the capacitance pen in a wireless mode, so that the capacitance pen receives the electric energy and charges.

In an optional embodiment, the battery management circuit includes a first resistor, a battery voltage detection module, a current setting module, a temperature detection module, and a charge management module;

one end of the first resistor is connected with the charging interface and the charging management module respectively, and the other end of the first resistor is connected with the temperature detection module and the charging management module respectively;

the charging management module is respectively connected with the energy storage battery and the current setting module, and the battery voltage detection module is connected with the energy storage battery.

In an alternative embodiment, the battery voltage detection module includes a second resistor, a third resistor, and a first capacitor;

one end of the second resistor is connected with the charging management module and the energy storage battery respectively, the second resistor is connected with the third resistor in series, and the third resistor is connected with the first capacitor in parallel;

one end of the third resistor is connected with the charging management module.

In an optional embodiment, the switching circuit includes a first diode, a first switching tube, a fourth resistor, a fifth resistor, a second capacitor, a third capacitor, a fourth capacitor, and a linear buck chip;

the anode of the first diode is connected with the charging interface and one end of the fourth resistor respectively, and the cathode of the first diode is connected with the boost circuit, the first end of the first switch tube, one end of the second capacitor and the input pin of the linear buck chip respectively; the second end of the first switching tube is connected with the energy storage battery;

the other end of the fourth resistor is respectively connected with one end of the fifth resistor and the third end of the first switch tube, and the other end of the fifth resistor is respectively connected with the other end of the second capacitor, a grounding pin of the linear voltage reduction chip, one end of the third capacitor, one end of the fourth capacitor and the ground;

and a power supply output pin of the linear voltage reduction chip is respectively connected with the other end of the third capacitor, the other end of the fourth capacitor and the wireless transmitting circuit.

In an optional embodiment, the boost circuit includes an input filter capacitor, an energy storage inductor, a second diode, a sixth resistor, a seventh resistor, a boost chip, and an output filter capacitor;

one end of the input filter capacitor is connected with the switching circuit, the enable pin of the boost chip, the power input pin of the boost chip and one end of the energy storage inductor respectively, and the other end of the input filter capacitor is connected with the grounding end of the boost chip, one end of the seventh resistor, one end of the output filter capacitor and the ground respectively;

the other end of the seventh resistor is connected with an output voltage feedback pin of the boost chip and one end of the sixth resistor respectively;

the other end of the energy storage inductor is connected with a switch control pin of the boosting chip and the anode of a second diode respectively, and the cathode of the second diode is connected with the other end of the sixth resistor, the other end of the output filter capacitor and the wireless transmitting circuit respectively.

In an optional embodiment, the wireless transmitting circuit comprises a hall detecting unit, a transmitting control unit, a signal amplifying unit and a micro control unit;

the micro control unit is respectively connected with the Hall detection unit, the emission control unit and the signal amplification unit, and the emission control unit is respectively connected with the signal amplification unit;

the Hall detection unit is used for inputting a corresponding feedback signal to the micro control unit after the capacitive pen is detected to be put in;

the micro control unit is used for triggering the transmitting control unit to transmit a magnetic field signal to the capacitance pen according to the feedback signal; the signal amplification unit is used for collecting the signal of the emission control unit and amplifying the signal.

In an optional embodiment, the transmission control unit includes an eighth resistor, a second switch tube, a transmission coil, a third switch tube, a ninth resistor, a tenth resistor, an eleventh resistor, a fifth capacitor, and a sixth capacitor;

one end of the eighth resistor is connected with the first end of the second switch tube and the boost circuit respectively, the other end of the eighth resistor is connected with the micro control unit and the third end of the second switch tube respectively, and the second end of the second switch tube is connected with one end of the transmitting coil and one end of the fifth capacitor respectively;

a second end of the third switching tube is connected with the other end of the transmitting coil and the other end of the fifth capacitor respectively, and a third end of the third switching tube is connected with one end of the tenth resistor and the micro control unit respectively;

the first end of the third switching tube is connected with the other end of the tenth resistor, one end of the ninth resistor and one end of the eleventh resistor respectively, the other end of the ninth resistor is connected with one end of the sixth capacitor and the signal amplification unit respectively, and the other end of the sixth capacitor and the other end of the eleventh resistor are both grounded.

In an optional embodiment, the wireless transmission circuit further comprises an indication unit, and the indication unit is connected with the micro control unit.

In a second aspect, the present invention provides a wireless charging system, which includes a capacitance pen and the wireless charging chamber;

the wireless storehouse of charging is used for sending the electric energy to through wireless mode the electric capacity pen, the electric capacity pen is used for receiving the electric energy charges.

In an optional embodiment, the capacitance pen comprises a wireless receiving circuit, a charging control circuit and a battery, wherein the wireless receiving circuit comprises a receiving coil and a rectifying unit;

the rectifying unit is respectively connected with the receiving coil and the charging control circuit, and the charging control circuit is connected with the battery.

The utility model provides a wireless charging storehouse and wireless charging system's beneficial effect is:

the wireless charging bin comprises a charging interface, a battery management circuit, an energy storage battery, a switching circuit, a boosting circuit and a wireless transmitting circuit; the switching circuit is respectively connected with the charging interface, the energy storage battery and the booster circuit, the booster circuit is connected with the wireless transmitting circuit, and the battery management circuit is respectively connected with the charging interface and the energy storage battery; the wireless charging bin transmits the electric energy to the capacitance pen in a wireless mode so that the capacitance pen receives the electric energy and charges the electric energy. The wireless charging device can wirelessly charge the capacitance pen for multiple times, and can meet the mobile portability of users in the process of using the capacitance pen.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a wireless charging bin provided in an embodiment of the present invention;

fig. 2 is a schematic view of a first structure of a battery management circuit in a wireless charging chamber according to an embodiment of the present invention;

fig. 3 is a second schematic structural diagram of a battery management circuit in a wireless charging bin according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a switching circuit in a wireless charging bin according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a voltage boosting circuit in a wireless charging bin according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a wireless transmitting circuit in a wireless charging bin according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an emission control unit in a wireless charging bin according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a signal amplification unit in a wireless charging bin according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a capacitance pen in a wireless charging bin according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a wireless receiving circuit of a capacitance pen in a wireless charging bin according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a charging interface in a wireless charging bin provided by an embodiment of the present invention.

Icon:

100-a wireless charging bin; 200-a capacitance pen; 210-a wireless receiving circuit; 1000-wireless charging system; 110-a charging interface; 120-battery management circuitry; 121-cell voltage detection module; 122-a current setting module; 123-temperature detection module; 124-charge management module; 130-an energy storage battery; 140-a switching circuit; 150-a wireless transmit circuit; 160-a boost circuit; 151-hall detection unit; 152-an emission control unit; 153-signal amplification unit; 154-a micro control unit; 155-an indication unit; 220-a charge control circuit; 230-battery.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to 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 or explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and for simplicity of description, and do not indicate or imply that the equipment or components that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It can be understood that, in the present application, an energy storage battery 130 is added in the charging bin, and when the capacitance pen 200 is not used, the energy storage battery 130 is fully charged, and when the capacitance pen 200 is not used, the capacitance pen 200 is placed in the wireless charging bin 100 to realize charging, and the charging can be performed for multiple times. For example, when using capacitive pen 200 to carry out the drawing of painting from life in the open air, it once can use 8 hours to calculate to be full of the electricity according to capacitive pen 200, even use one day, if use 1000mAh lithium cell to do energy storage battery 130 in this application, the battery capacity in capacitive pen 200 can satisfy the user about 8 times demand of charging, can realize using 8 days in succession.

Examples

Referring to fig. 1, the present embodiment provides a wireless charging chamber 100, the wireless charging chamber 100 includes a charging interface 110, a battery management circuit 120, an energy storage battery 130, a switching circuit 140, a boosting circuit 160, and a wireless transmitting circuit 150, and the capacitance pen 200 includes a wireless receiving circuit 210.

In the present application, the switching circuit 140 is connected to the charging interface 110, the energy storage battery 130, and the boost circuit 160, the boost circuit 160 is connected to the wireless transmitting circuit 150, and the battery management circuit 120 is connected to the charging interface 110 and the energy storage battery 130. The wireless charging bin 100 transmits electric energy to the capacitive pen 200 in a wireless mode, and the capacitive pen 200 receives the electric energy through the wireless receiving circuit 210 to charge. The charging interface 110 charges the energy storage battery 130 through the battery management circuit 120, and also wirelessly charges the capacitive pen 200, and the wireless transmitting circuit 150 and the wireless receiving circuit 210 can both be set to a fast charging mode, so as to realize that the capacitive pen 200 is charged fully, thereby satisfying the user demand.

In one embodiment, as shown in fig. 2, the battery management circuit 120 includes a first resistor R1, a battery voltage detection module, a current setting module, a temperature detection module, and a charge management module. One end of the first resistor R1 is connected with the charging interface 110 and the charging management module respectively, the other end of the first resistor R1 is connected with the temperature detection module and the charging management module respectively, the charging management module is connected with the energy storage battery 130 and the current setting module respectively, and the battery voltage detection module is connected with the energy storage battery 130.

It is understood that the current setting module 122 includes a twelfth resistor R12 and a thirteenth resistor R13, and the current setting module 122 is configured to set the magnitude of the charging current; the temperature detection module 123 includes a seventh capacitor C9, a fourteenth resistor R14, and a fifteenth resistor R15, where the seventh capacitor C9, the fourteenth resistor R14, and the fifteenth resistor R15 are connected in parallel, and one end of the seventh capacitor C9, one end of the fourteenth resistor R14, and one end of the fifteenth resistor R15 are all grounded, and the other end of the seventh capacitor C9, one end of the fourteenth resistor R14, and the other end of the fifteenth resistor R15 are connected to the first resistor R1 and the charging management module 124, respectively. The fifteenth resistor R15 may be a temperature detection resistor, and the temperature detection module 123 is configured to detect the temperature of the energy storage battery 130 during charging, so as to prevent the temperature of the energy storage battery 130 from being over-temperature.

The charging management module 124 includes a sixteenth resistor R16, a seventeenth resistor R17, an eighth capacitor C10, a ninth capacitor C11, and a charging management chip U1. The charging management module 124 will detect the charging state of the energy storage battery 130 while providing power to the energy storage battery 130, and the charging management chip U1 may be an XT4097 chip.

One end of the first resistor R1 is connected to the charging interface 110, the power input pin (i.e., VIN pin, corresponding to the 4 th end of U1 in fig. 2) of the charging management chip U1, and one end of the eighth capacitor C10, and the other end of the eighth capacitor C10 is connected to the first ground pin (i.e., GND pin, corresponding to the 9 th end of U1 in fig. 2) of the charging management chip U1 and ground; the other end of the first resistor R1 is connected to one end of a seventh capacitor C9, one end of a fourteenth resistor R14, one end of a fifteenth resistor R15, and a temperature detection pin (i.e., a TEMP pin, corresponding to the 1 st end of U1 in fig. 2) of the charging management chip U1, respectively, and the other end of the seventh capacitor C9 is connected to the other end of the fourteenth resistor R14, the other end of the fifteenth resistor R15, and ground, respectively.

The charging current setting pin (i.e., the PROG pin, corresponding to the 2 nd end of U1 in fig. 2) of the charging management chip U1 is connected to one ends of the fourteenth resistor R14 and the fifteenth resistor R15, respectively, and the other end of the fifteenth resistor R15 is connected to the second ground pin (i.e., the GND pin, corresponding to the 3 rd end of U1 in fig. 2) and the ground of the charging management chip U1, respectively.

A charging state detection pin (i.e., a CHRG pin, corresponding to the 7 th end of U1 in fig. 2) of the charging management chip U1 is connected to the sixteenth resistor R16, a full-charging state detection pin (i.e., a DONE pin, corresponding to the 6 th end of U1 in fig. 2) of the charging management chip U1 is connected to the seventeenth resistor R17, a battery 230 pin (i.e., a BAT pin, corresponding to the 5 th end of U1 in fig. 2) of the charging management chip U1 is connected to the energy storage battery 130, one end of the ninth capacitor C11, the battery voltage detection module 121, and the first interface J1, respectively, and the other end of the ninth capacitor C11 is connected to the battery voltage detection module 121, the first interface J1, and ground, respectively.

It is understood that, as shown in fig. 3, the battery voltage detection module 121 includes a second resistor R2, a third resistor R3, and a first capacitor C1. One end of the second resistor R2 is connected to a battery 230 pin (i.e., BAT pin, corresponding to the 5 th end of U1 in fig. 2) of the charging management chip U1, and the other end of the second resistor R2 is connected to one end of the third resistor R3 and one end of the first capacitor C1, respectively; the other end of the third resistor R3 and the other end of the first capacitor C1 are both grounded. The battery voltage detection module 121 is configured to detect the voltage of the energy storage battery 130 through the VB _ AD port.

Wherein, the one end of the second resistance R2 of the battery voltage detection module 121 is connected with the 4 th end of the first interface J1 and one end of the third capacitance C3 respectively, the 1 st end of the first interface J1 is connected with the 2 nd end of the first interface J1, and is all grounded, and the 3 rd end of the first interface J1 is connected with the other end of the third resistance R3 of the battery voltage detection module 121, the other end of the first capacitance C1 and the ground. In use, the first interface J1 is used to connect the energy storage battery 130 through the connection line when the voltage of the energy storage battery 130 is far away from the battery management circuit 120.

In one embodiment, as shown in fig. 4, the switching circuit 140 includes a first diode D1, a first switch Q1, a fourth resistor R4, a fifth resistor R5, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a linear buck chip U2. The first switch tube Q1 may be a PMOS tube, and when the first switch tube Q1 is a PMOS tube, the first end of the first switch tube Q1 is a source electrode (S pole) of the PMOS tube, the second end of the first switch tube Q1 is a drain electrode (D pole) of the PMOS tube, and the third end of the first switch tube Q1 is a gate electrode (G pole) of the PMOS tube.

An anode of the first diode D1 is connected to the charging interface 110 and one end of the fourth resistor R4, respectively, and a cathode of the first diode D1 is connected to the boost circuit 160, the first end of the first switch tube Q1 (corresponding to the 1 st end of Q1 in fig. 3), one end of the second capacitor C2, and the input pin (i.e., VIN pin, corresponding to the 3 rd end of U2 in fig. 3) of the linear buck chip U2, respectively; a second end (corresponding to the 2 nd end of Q1 in fig. 3) of the first switch tube Q1 is connected to the energy storage battery 130. The other end of the fourth resistor R4 is connected to one end of the fifth resistor R5 and the third end (corresponding to the 3 rd end of Q1 in fig. 3) of the first switch tube Q1, respectively, and the other end of the fifth resistor R5 is connected to the other end of the second capacitor C2, the ground pin (i.e., the GND pin, corresponding to the 1 st end of U2 in fig. 3) of the linear buck chip U2, one end of the third capacitor C3, one end of the fourth capacitor C4, and ground, respectively. The power output pin (i.e., the VOUT pin, corresponding to the 2 nd terminal of U2 in fig. 3) of the linear buck chip U2 is connected to the other end of the third capacitor C3, the other end of the fourth capacitor C4, and the wireless transmitting circuit 150, respectively.

It can be understood that, when the charging interface 110 sends the electric energy to the switching circuit 140, the charging interface 110 supplies power to the linear voltage-reducing chip U2 through the VBUS terminal, at this time, the first switch tube Q1 is not turned on, the linear voltage-reducing chip U2 outputs a corresponding voltage to supply power to the wireless transmitting circuit 150, and if the output voltage is 3V, the energy storage battery 130 does not discharge any more at this time, which may increase the service life of the energy storage battery 130. When the charging interface 110 does not supply power, the energy storage battery 130 is used to supply power to the linear buck chip U2 through the BAT port, so that the linear buck chip U2 outputs a corresponding voltage to supply power to the wireless transmitting circuit 150.

In one embodiment, as shown in fig. 5, the boost circuit 160 includes an input filter capacitor C5, an energy storage inductor L1, a second diode D2, a sixth resistor R6, a seventh resistor R7, a boost chip U3, and an output filter capacitor C6.

One end of the input filter capacitor C5 is connected to the switching circuit 140 through the VIN terminal, one end of the input filter capacitor C5 is connected to an enable pin (i.e., an EN pin, corresponding to the 4 th end of U3 in fig. 4), a power input pin (i.e., a VIN pin, corresponding to the 5 th end of U3 in fig. 4) of the boost chip U3, and one end of the energy storage inductor L1, and the other end of the input filter capacitor C5 is connected to a ground terminal (i.e., a GND pin, corresponding to the 2 nd end of U3 in fig. 4) of the boost chip U3, one end of the seventh resistor R7, one end of the output filter capacitor C6, and ground, respectively;

the other end of the seventh resistor R7 is connected to an output voltage feedback pin (i.e., an EB pin, corresponding to the 3 rd end of U3 in fig. 4) of the boost chip U3 and one end of the sixth resistor R6, respectively; the other end of the energy storage inductor L1 is connected to a switch control pin (i.e., a SW pin, corresponding to the 1 st end of U3 in fig. 4) of the boost chip U3 and an anode of the second diode D2, and a cathode of the second diode D2 is connected to the other end of the sixth resistor R6, the other end of the output filter capacitor C6, and the wireless transmitting circuit 150.

It can be understood that the voltage provided by the charging interface 110 or the voltage provided by the energy storage battery 130 is converted by the voltage boost circuit 160 to be output, for example, directly converted to be 5V voltage output, so as to meet the transmission voltage requirement of the wireless charging chamber 100. The second diode D2 may be a rectifying diode, the seventh resistor R7 and the sixth resistor R6 will constitute a boost control resistor, and the corresponding output voltage of the boost circuit 160 can be controlled by changing the resistance of the seventh resistor R7 or the sixth resistor R6, wherein the output voltage is set to 5V.

In one embodiment, as shown in fig. 6, the wireless transmission circuit 150 includes a hall detection unit 151, a transmission control unit 152, a signal amplification unit 153, and a micro control unit 154. The micro control unit 154 is connected to the hall detection unit 151, the emission control unit 152, and the signal amplification unit 153, and the emission control unit 152 is connected to the signal amplification unit 153.

It can be understood that when the capacitance pen 200 is placed in the wireless charging chamber 100 for charging, the magnet in the capacitance pen 200 will be close to the hall detection unit 151, and at this time, the hall sensor in the hall detection unit 151 will detect the placement of the capacitance pen 200, and after detecting the placement of the capacitance pen 200, the hall detection unit 151 will input a corresponding feedback signal to the micro control unit 154. After receiving the feedback signal, the mcu 154 triggers the emission control unit 152 to emit a corresponding electromagnetic induction magnetic field signal, i.e. a magnetic field signal, to the stylus 200 according to the feedback signal. The signal amplifying unit 153 amplifies the signal of the acquisition and emission control unit 152 and the signal acquired at the front end, so as to perform acquisition processing on an AD (analog-to-digital conversion) sampling pin of the micro control unit 154. The micro control Unit 154 includes an MCU (micro controller Unit), which is a control circuit for product functions, including data transmission, logic control, algorithm control, and exception protection.

In one embodiment, the wireless transmitting circuit 150 further includes an indicating unit 155, the indicating unit 155 is connected to the micro control unit 154, and the indicating unit 155 may be a charging indicator light. In the charging process of the capacitance pen 200, the charging indicator lamp keeps a flashing state, and after the full charging is finished, the charging indicator lamp keeps a normally-on state.

In one embodiment, as shown in fig. 7, the transmission control unit 152 includes an eighth resistor R8, a second switch Q2, a transmission coil L2, a third switch Q3, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a fifth capacitor C7, and a sixth capacitor C8.

One end of the eighth resistor R8 is connected to the first end (corresponding to the 1 st end of Q2 in fig. 7) of the second switch Q2 and the boost circuit 160, the other end of the eighth resistor R8 is connected to the micro control unit 154 and the third end (corresponding to the 3 rd end of Q2 in fig. 7) of the second switch Q2, and the second end (corresponding to the 2 nd end of Q2 in fig. 7) of the second switch Q2 is connected to one end of the transmitting coil L2 and one end of the fifth capacitor C7; a second terminal (corresponding to the 2 nd terminal of Q3 in fig. 7) of the third switching tube Q3 is respectively connected to the other end of the transmitting coil L2 and the other end of the fifth capacitor C7, and a third terminal (corresponding to the 3 rd terminal of Q3 in fig. 7) of the third switching tube Q3 is respectively connected to one end of the tenth resistor R10 and the micro control unit 154.

A first end (corresponding to the 1 st end of Q3 in fig. 7) of the third switching tube Q3 is connected to the other end of the tenth resistor R10, one end of the ninth resistor R9, and one end of the eleventh resistor R11, the other end of the ninth resistor R9 is connected to one end of the sixth capacitor C8 and the signal amplifying unit 153, and the other end of the sixth capacitor C8 and the other end of the eleventh resistor R11 are both grounded. When the second switch tube Q2 or the second switch tube Q2 is a PMOS tube, the first end of the first switch tube Q1 or the second switch tube Q2 is a source electrode (S pole) of the PMOS tube, the second end of the first switch tube Q1 or the second switch tube Q2 is a drain electrode (D pole) of the PMOS tube, and the third end of the first switch tube Q1 or the second switch tube Q2 is a gate electrode (G pole) of the PMOS tube.

It is understood that, as shown in fig. 7, one end of the eighth resistor R8 is connected to the BL pin of the mcu 154, and the third end (corresponding to the 3 rd end of Q3 in fig. 7) of the third switch Q3 is connected to the AH pin of the mcu 154. When the BL signal sent by the micro control unit 154 through the BL pin is at a low level, the second switching tube Q2 is turned on; when the AH signal from the mcu 154 via the AH pin is high, the third transistor Q3 is turned on. The ac excitation signal generated by the transmitting coil L2 is driven and controlled by the micro control unit 154, and the oscillating ac signal is generated on the transmitting coil L2 by continuously switching the second switching tube Q2 and the third switching tube Q3, so that the receiving coil L3 connected to the capacitive pen 200 receives the excitation signal of the transmitting coil L2 through electromagnetic induction. The eleventh resistor R11 is used for collecting the current of the transmitting coil L2, and the ninth resistor R9 and the sixth capacitor C8 are both used for filtering.

In one embodiment, as shown in fig. 8, the signal amplifying unit 153 includes an operational amplifier U4, an eighteenth resistor R18, and a nineteenth resistor R19.

Wherein, the non-inverting input terminal (corresponding to the 3 rd terminal of U4 in fig. 8) of the operational amplifier U4 is connected to the transmission control unit 152, the inverting input terminal (corresponding to the 2 nd terminal of U4 in fig. 8) of the operational amplifier U4 is connected to one end of the eighteenth resistor R18 and one end of the nineteenth resistor R19, respectively, and the other end of the eighteenth resistor R18 is grounded; the power supply terminal (corresponding to the 8 th terminal U4 in fig. 8) of the operational amplifier U4 is connected to the output filter capacitor C6 of the voltage boost circuit 160, the ground terminal (corresponding to the 4 th terminal U4 in fig. 8) of the operational amplifier U4 is grounded, and the other terminal of the nineteenth resistor R19 is connected to the output terminal of the operational amplifier U4 and the micro-control unit 154, respectively, that is, connected to the micro-control unit 154 through the AMP _ OUT terminal. It will be appreciated that the operational amplifier U4 amplifies the acquired signal for acquisition at an AD (analog to digital conversion) sampling pin of the MCU in the micro control unit 154.

Based on the wireless charging bin 100, the embodiment of the present application further provides a wireless charging system 1000, where the wireless charging system includes a capacitive pen 200 and the wireless charging bin 100; the wireless charging bin 100 is used for sending electric energy to the capacitance pen 200 in a wireless mode, and the capacitance pen 200 is used for receiving the electric energy and charging.

The capacitance pen 200 comprises a wireless receiving circuit 210, a charging control circuit 220 and a battery 230, wherein the wireless receiving circuit 210 comprises a receiving coil L3 and a rectifying unit; the rectifying unit is connected to the receiving coil L3 and the charging control circuit 220, and the charging control circuit 220 is connected to the battery 230.

As shown in fig. 9, the capacitance pen 200 includes a wireless receiving circuit 210, a charging control circuit 220 and a battery 230, wherein the charging control circuit 220 is respectively connected with the wireless receiving circuit 210 and the battery 230. As shown in fig. 10, the wireless receiving circuit 210 includes a receiving coil L3 and a rectifying unit, the rectifying unit is respectively connected to the receiving coil L3 and the charging control circuit 220, the charging control circuit 220 is connected to the battery 230, the rectifying unit includes a rectifying bridge and a tenth capacitor C12, and the rectifying bridge includes four diodes. One end of the receiving coil L3 is connected to one end of the tenth capacitor C12, the other end of the tenth capacitor C12 is connected to the first input end of the rectifier bridge (corresponding to the 1 st end of the rectifier bridge in fig. 10), the other end of the receiving coil L3 is connected to the second input end of the rectifier bridge (corresponding to the 4 th end of the rectifier bridge in fig. 10), and both the first output end of the rectifier bridge (corresponding to the 2 nd end of the rectifier bridge in fig. 10) and the second output end of the rectifier bridge (corresponding to the 3 rd end of the rectifier bridge in fig. 10) are connected to the charging control circuit 220 of the charging control circuit 220.

The battery 230 may be a lithium ion battery 230 supporting high-rate charging, that is, the capacitance pen 200 may be charged quickly. The charging control circuit 220 includes a receiving control unit and a charging management unit for controlling the charging current and voltage of the capacitive pen 200 to prevent overcharging. In addition, the wireless receiving circuit 210 further comprises a thermistor to detect the temperature of the wireless receiving circuit 210 and prevent the charging from being over-temperature. When the wireless receiving circuit 210 in the capacitive pen 200 receives the magnetic field signal of the wireless charging chamber 100, the charging control circuit 220 converts the magnetic field signal into a corresponding voltage signal to output a direct current to provide electric energy for the battery 230. In other words, the receiving coil L3 receives the excitation signal sent by the transmitting coil L2, stores and converts energy through the tenth capacitor C12, and then rectifies the energy through the diode of the rectifier bridge to output direct current to the battery 230 for charging.

In one embodiment, as shown in fig. 11, the charging interface 110 includes a second interface J2, an eleventh capacitor C13, a twentieth resistor R20, a twenty-first resistor R21, and a twenty-second resistor R22, wherein a second end (i.e., VBUS pin corresponding to the 2 nd end of J2 in fig. 11) of the second interface J2 is connected to a fifth end (i.e., VBUS pin corresponding to the 5 th end of J2 in fig. 11), the switching circuit 140, and the battery management circuit 120 of the second interface J2, a first end (i.e., GND pin corresponding to the 1 st end of J2 in fig. 11) and a sixth end (i.e., GND pin corresponding to the 6 th end of J2 in fig. 11) of the second interface J2 are both grounded, a third end (i.e., CC2 pin corresponding to the 3 rd end of J2 in fig. 11) of the second interface J2 is connected to one end of the twenty-second resistor R22, and a fourth end (i.e., CC1 pin corresponding to the twenty-first end of J2 in fig. 11) of the twenty-second interface J2 is connected to the other end of the twenty-second resistor R22, and the other end (i.e., CC pin corresponding to the twenty-first resistor R21 and the twenty-second interface J2) are both grounded.

It can be understood that the second interface J2 is a socket of the charging interface 110, and may be a Type-C interface, and since the socket of the charging interface 110 is exposed, in order to prevent devices such as the battery management circuit 120 from being damaged when static electricity is applied, in this application, the seventh pin (i.e., GND pin, corresponding to the 7 th end of J2 in fig. 11), the eighth pin (i.e., GND pin, corresponding to the 8 th end of J2 in fig. 11), the ninth pin (i.e., GND pin, corresponding to the 9 th end of J2 in fig. 11), and the tenth pin (i.e., GND pin, corresponding to the 10 th end of J2 in fig. 11) that are corresponding to the second interface J2 are connected to the eleventh capacitor C13 through the twentieth resistor R20, the twenty-first resistor R21, the twenty-second resistor R22, and connected to the first ground pin, the second ground pin and the ground, so as to enhance the capability of anti-static electricity interference.

This application not only can make electric capacity pen 200 carry out wireless charging, can make electric capacity pen 200 charge moreover many times to satisfy the user and use the electric capacity pen 200 in-process removal portability and charge the demand of once lasting use.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wireless charging bin is characterized by comprising a charging interface, a battery management circuit, an energy storage battery, a switching circuit, a booster circuit and a wireless transmitting circuit;

2. The wireless charging bin of claim 1, wherein the battery management circuit comprises a first resistor, a battery voltage detection module, a current setting module, a temperature detection module, and a charging management module;

3. The wireless charging bin of claim 2, wherein the battery voltage detection module comprises a second resistor, a third resistor, and a first capacitor;

one end of the second resistor is respectively connected with the charging management module and the energy storage battery, the second resistor is connected with the third resistor in series, and the third resistor is connected with the first capacitor in parallel;

one end of the third resistor is connected with the charging management module.

4. The wireless charging chamber of claim 1, wherein the switching circuit comprises a first diode, a first switch tube, a fourth resistor, a fifth resistor, a second capacitor, a third capacitor, a fourth capacitor and a linear buck chip;

the other end of the fourth resistor is respectively connected with one end of the fifth resistor and the third end of the first switching tube, and the other end of the fifth resistor is respectively connected with the other end of the second capacitor, the grounding pin of the linear voltage reduction chip, one end of the third capacitor, one end of the fourth capacitor and the ground;

5. The wireless charging bin of claim 1, wherein the boost circuit comprises an input filter capacitor, an energy storage inductor, a second diode, a sixth resistor, a seventh resistor, a boost chip and an output filter capacitor;

one end of the input filter capacitor is connected with the switching circuit, the enable pin of the boost chip, the power input pin of the boost chip and one end of the energy storage inductor, and the other end of the input filter capacitor is connected with the grounding end of the boost chip, one end of the seventh resistor, one end of the output filter capacitor and the ground;

the other end of the energy storage inductor is connected with a switch control pin of the boost chip and the anode of a second diode respectively, and the cathode of the second diode is connected with the other end of the sixth resistor, the other end of the output filter capacitor and the wireless transmitting circuit respectively.

6. The wireless charging bin of claim 1, wherein the wireless transmitting circuit comprises a hall detecting unit, a transmitting control unit, a signal amplifying unit and a micro control unit;

7. The wireless charging chamber according to claim 6, wherein the transmission control unit comprises an eighth resistor, a second switch tube, a transmission coil, a third switch tube, a ninth resistor, a tenth resistor, an eleventh resistor, a fifth capacitor and a sixth capacitor;

the first end of the third switch tube is respectively connected with the other end of the tenth resistor, one end of the ninth resistor and one end of the eleventh resistor, the other end of the ninth resistor is respectively connected with one end of the sixth capacitor and the signal amplification unit, and the other end of the sixth capacitor and the other end of the eleventh resistor are both grounded.

8. The wireless charging bin of claim 6, wherein the wireless transmitting circuit further comprises an indicating unit, and the indicating unit is connected with the micro control unit.

9. A wireless charging system, comprising a capacitive stylus and a wireless charging chamber according to any one of claims 1 to 8;

10. The wireless charging system of claim 9, wherein the capacitance pen comprises a wireless receiving circuit, a charging control circuit and a battery, wherein the wireless receiving circuit comprises a receiving coil and a rectifying unit;