Magnetic attraction charging device

Abstract

The utility model belongs to the technical field of charging, and particularly relates to a magnetic attraction charging device which comprises a first interface, a charging management module, a charging protocol module, a microcontroller, a mirror current source module, a first node and a second interface, the charging management module is electrically connected with the first interface, the charging protocol module is electrically connected with the first node, and the microcontroller is electrically connected with the second node. The mirror current source module is electrically connected with the charging management module, the second interface is electrically connected with the first node, and the charging protocol module and the mirror current source module are both electrically connected with the microcontroller; wherein the first interface is used for being connected with an external power supply, and the second interface is used for being connected with power receiving equipment.

Description

Technical Field

[0001] This invention belongs to the field of charging technology, specifically relating to a magnetic charging device. Background Technology

[0002] Different models of receiving devices have different battery capacities. When the charging current is high, the charging time can be reduced. When the charging current is high, the charging of the battery can be safer and the battery life can also be improved. Battery charging needs to consider both charging time and battery life. However, conventional magnetic charging devices have a small charging current range and cannot be compatible with batteries of different models of receiving devices. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a magnetic charging device that improves the problem of magnetic charging devices being incompatible with batteries of various types of receiving devices.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A magnetic charging device includes: a first interface, a charging management module, a charging protocol module, a microcontroller, a current mirroring module, a first node, and a second interface. The charging management module is electrically connected to the first interface, the charging protocol module is electrically connected to the first node, the current mirroring module is electrically connected to the charging management module, and the second interface is electrically connected to the first node. Both the charging protocol module and the current mirroring module are electrically connected to the microcontroller. The first interface is used to connect to an external power source, and the second interface is used to connect to a powered device.

[0006] Furthermore, the charging management module includes a charging management chip, and the mirror current source module includes a first transistor and a second transistor. The collector of the first transistor is electrically connected to the pulse terminal of the microcontroller, the emitter of the first transistor is grounded, the base of the first transistor is electrically connected to the base of the second transistor, the collector of the second transistor is electrically connected to the charging current detection terminal of the charging management chip, and the emitter of the second transistor is grounded.

[0007] Furthermore, the magnetic charging device also includes an RC filter module, which is electrically connected to the microcontroller. The mirror current source module is electrically connected to the RC filter module and the charging management module.

[0008] Furthermore, the RC filter module includes: a first resistor, a first capacitor, a second resistor, a second capacitor, and a third resistor. The first end of the first resistor is electrically connected to the pulse terminal of the microcontroller. The second end of the first resistor is electrically connected to the first end of the second resistor. The second end of the second resistor is electrically connected to the first end of the third resistor. The second end of the third resistor is electrically connected to the collector of the first transistor. The first end of the first capacitor is electrically connected to the second end of the first resistor. The second end of the first capacitor is grounded. The first end of the second capacitor is electrically connected to the second end of the second resistor. The second end of the second capacitor is grounded.

[0009] Furthermore, the charging protocol module includes a third transistor, a first MOSFET, and a first diode. The base of the third transistor is electrically connected to the transmitting end of the microcontroller, the collector of the third transistor is electrically connected to the receiving end of the microcontroller, the emitter of the third transistor is electrically connected to the input end of the first MOSFET, the output end of the first MOSFET is electrically connected to the first node, the control end of the first MOSFET is electrically connected to the first enable end of the microcontroller, the positive input end of the first diode is electrically connected to the input end of the first MOSFET, and the negative output end of the first diode is electrically connected to the transmitting end of the microcontroller.

[0010] Furthermore, the magnetic charging device also includes a switch module, which is electrically connected to the charging management module, the first node, and the microcontroller.

[0011] Furthermore, the magnetic charging device also includes a switching chip, the input terminal of which is electrically connected to the voltage output terminal of the charging management chip, the output terminal of which is electrically connected to the first node, the enable terminal of which is electrically connected to the second enable terminal of the microcontroller, and the ground terminal of which is used for grounding.

[0012] Furthermore, the magnetic charging device also includes a voltage regulator module, which is electrically connected to the microcontroller.

[0013] Furthermore, the magnetic charging device also includes a temperature detection module, which is electrically connected to the microcontroller.

[0014] Furthermore, the second interface is a magnetic charging interface.

[0015] The beneficial effects of this invention are:

[0016] This application provides a magnetic charging device, including: a first interface, a charging management module, a charging protocol module, a microcontroller, a mirror current source module, a first node, and a second interface. The charging management module is electrically connected to the first interface, the charging protocol module is electrically connected to the first node, the mirror current source module is electrically connected to the charging management module, and the second interface is electrically connected to the first node. Both the charging protocol module and the mirror current source module are electrically connected to the microcontroller. The first interface is used to connect to an external power source, and the second interface is used to connect to a powered device. By configuring the charging management module to connect to the first interface, the charging protocol module to the first node, the mirror current source module to the charging management module, and the second interface to the first node, and both the charging protocol module and the mirror current source module to the microcontroller, and by using the first interface to connect to an external power source and the second interface to connect to a powered device, the charging management module can output different voltages according to actual needs, thereby providing different charging currents for batteries of different models of powered devices. This ensures that the magnetic charging device is compatible with different battery models of multiple powered devices. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the connection of the first interface, charging management module, charging protocol module, mirror current source module, RC filter module, switch module, first node, and second interface of this application;

[0018] Figure 2 This is a schematic diagram of the charging management module of this application;

[0019] Figure 3 This is a schematic diagram of the charging protocol module of this application;

[0020] Figure 4 This is the circuit schematic of the microcontroller of this application;

[0021] Figure 5 This is a schematic diagram of the charging mirror current source module of this application;

[0022] Figure 6 This is a schematic diagram of the RC filter module of this application;

[0023] Figure 7 This is a schematic diagram of the switch module of this application;

[0024] Figure 8 This is a schematic diagram of the voltage regulator module of this application;

[0025] Figure 9 This is a schematic diagram of the temperature detection module of this application;

[0026] Figure 10 This is a schematic diagram of the indicator light module of this application. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In the embodiments of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Embodiments of this application provide a magnetic charging device, see reference. Figures 1-10The magnetic charging device includes: a first interface P1 / P2, a charging management module, a charging protocol module, a microcontroller U5, a mirror current source module, a first node N, and a second interface CHG+. The charging management module is electrically connected to the first interface P1 / P2, the charging protocol module is electrically connected to the first node N, the mirror current source module is electrically connected to the charging management module, and the second interface CHG+ is electrically connected to the first node N. Both the charging protocol module and the mirror current source module are electrically connected to the microcontroller U5. The first interface P1 / P2 is used to connect to an external power source, and the second interface CHG+ is used to connect to a powered device.

[0032] By configuring the charging management module to be electrically connected to the first interface P1 / P2, the charging protocol module to be electrically connected to the first node N, the mirror current source module to be electrically connected to the charging management module, and the second interface CHG+ to be electrically connected to the first node N, and both the charging protocol module and the mirror current source module are electrically connected to the microcontroller U5; wherein, the first interface P1 / P2 is used to connect to an external power source, and the second interface CHG+ is used to connect to a powered device, the charging management module can output different voltages according to actual needs, thereby providing different charging currents for batteries of different models of powered devices, thus ensuring that the magnetic charging device can be compatible with different battery models of multiple powered devices.

[0033] In this embodiment, the microcontroller U5 is model N32G031.

[0034] In this embodiment, the first interface P1 / P2 is a Micro-USB interface or a USB Type-C interface.

[0035] In this embodiment, the second interface CHG+ is a magnetic charging interface.

[0036] In this embodiment, reference Figure 2The charging management module includes a charging management chip U1, and the mirror current source module includes a first transistor Q1 and a second transistor Q2. The collector of the first transistor Q1 is electrically connected to the pulse terminal PA5 of the microcontroller U5, the emitter of the first transistor Q1 is grounded, the base of the first transistor Q1 is electrically connected to the base of the second transistor Q2, the collector of the second transistor Q2 is electrically connected to the charging current detection terminal ICHG of the charging management chip U1, and the emitter of the second transistor Q2 is grounded. By configuring the mirror current source module to include a first transistor Q1 and a second transistor Q2, the collector of the first transistor Q1 is electrically connected to the pulse terminal PA5 of the microcontroller U5, the emitter of the first transistor Q1 is grounded, the base of the first transistor Q1 is electrically connected to the base of the second transistor Q2, the collector of the second transistor Q2 is electrically connected to the charging current detection terminal ICHG of the charging management chip U1, and the emitter of the second transistor Q2 is grounded, so that after the signal from the pulse terminal PA5 of the microcontroller U5 enters the mirror current source module, the mirror current source module can generate a mirror current, which is input to the charging current detection terminal ICHG of the charging management chip U1. This ensures that the charging management chip U1 can adjust the output current and ensures that the magnetic charging device can output different currents.

[0037] In this embodiment, the first transistor Q1 and the second transistor Q2 form an NPN silicon transistor, and the NPN silicon transistor is model BC847QASZ.

[0038] In this embodiment, the charging management module further includes a tenth resistor R10. One end of the tenth resistor R10 is electrically connected to the collector of the second transistor Q2, and the second end of the tenth resistor R10 is electrically connected to the charging current detection terminal ICHG of the charging management chip U1.

[0039] In this embodiment, the charging management chip U1 is model SY6918A.

[0040] In this embodiment, the magnetic charging device further includes an RC filter module, which is electrically connected to the microcontroller U5. The mirror current source module is electrically connected to both the RC filter module and the charging management module. By including the RC filter module in the magnetic charging device, and ensuring that the RC filter module can filter the pulse signal from the pulse terminal PA5 of the microcontroller U5 into a corresponding DC voltage, the mirror current source can achieve greater accuracy.

[0041] In this embodiment, reference Figure 6 The RC filter module includes: a first resistor R1, a first capacitor C1, a second resistor R2, a second capacitor C2, and a third resistor R3. The first end of the first resistor R1 is electrically connected to the pulse terminal PA5 of the microcontroller U5. The second end of the first resistor R1 is electrically connected to the first end of the second resistor R2. The second end of the second resistor R2 is electrically connected to the first end of the third resistor R3. The second end of the third resistor R3 is electrically connected to the collector of the first transistor Q1. The first end of the first capacitor C1 is electrically connected to the second end of the first resistor R1. The second end of the first capacitor C1 is grounded. The first end of the second capacitor C2 is electrically connected to the second end of the second resistor R2. The second end of the second capacitor C2 is grounded.

[0042] In this embodiment, reference Figure 3 The charging protocol module includes a third transistor Q3, a first MOSFET Q4, and a first diode D1. The base of the third transistor Q3 is electrically connected to the transmitting terminal UTX1 of the microcontroller U5, the collector of the third transistor Q3 is electrically connected to the receiving terminal URX1 of the microcontroller U5, the emitter of the third transistor Q3 is electrically connected to the input terminal of the first MOSFET Q4, the output terminal of the first MOSFET Q4 is electrically connected to the first node N, the control terminal of the first MOSFET Q4 is electrically connected to the first enable terminal PB1 of the microcontroller U5, the positive input terminal of the first diode D1 is electrically connected to the input terminal of the first MOSFET Q4, and the negative output terminal of the first diode D1 is electrically connected to the transmitting terminal UTX1 of the microcontroller U5. By configuring the charging protocol module to include a third transistor Q3, a first MOSFET Q4, and a first diode D1, the base of the third transistor Q3 is electrically connected to the transmitting terminal UTX1 of the microcontroller U5, the collector of the third transistor Q3 is electrically connected to the receiving terminal URX1 of the microcontroller U5, the emitter of the third transistor Q3 is electrically connected to the input terminal of the first MOSFET Q4, the output terminal of the first MOSFET Q4 is electrically connected to the first node N, the control terminal of the first MOSFET Q4 is electrically connected to the first enable terminal PB1 of the microcontroller U5, the positive input terminal of the first diode D1 is electrically connected to the input terminal of the first MOSFET Q4, and the negative output terminal of the first diode D1 is electrically connected to the transmitting terminal UTX1 of the microcontroller U5, the charging protocol module can communicate with the powered device according to the protocol and output corresponding signals to the microcontroller U5 according to the charging current required by the detected powered device, ensuring that the microcontroller U5 can output corresponding pulse signals.

[0043] In this embodiment, reference Figure 3The charging protocol module also includes a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6. The first end of the fourth resistor R4 is electrically connected to the negative output terminal of the first diode D1, the second end of the fourth resistor R4 is electrically connected to the base of the third transistor Q3, the first end of the fifth resistor R5 is electrically connected to the emitter of the third transistor Q3, the second end of the fifth resistor R5 is electrically connected to the first end of the sixth resistor R6, and the second segment of the sixth resistor R6 is electrically connected to the first enable terminal PB1 of the microcontroller U5.

[0044] When in operation and in transmit mode, the serial port is configured with a built-in pull-up. The first enable pin PB1 (EN_UART) of microcontroller U5 is enabled at a high level. When the transmit pin UTX1 of microcontroller U5 is at a high level, the first enable pin PB1 (EN_UART) of microcontroller U5 flows to the second interface CHG+ through the fifth resistor R5 and the first MOSFET Q4. At this time, the second interface CHG+ is at a high level. When the transmit pin UTX1 of microcontroller U5 is at a low level, the first enable pin PB1 (EN_UART) of microcontroller U5 flows to the transmit pin UTX1 of microcontroller U5 through the fifth resistor R5 and the first diode D1. The voltage of the second interface CHG+ is approximately the voltage of the positive input terminal of the first diode D1, and is approximately 0.

[0045] When in receive mode, the transmitter UTX1 of microcontroller U5 is in the default pull-up state. When the second interface CHG+ is high, the third transistor Q3 and the first MOSFET Q4 are not turned on because the turn-on condition has not been met. The receiver UTX1 of microcontroller U5 is pulled up to 1 high level through the built-in pull-up. When the second interface CHG+ is low, the third transistor Q3 and the first MOSFET Q4 are turned on after the turn-on condition is met. The receiver UTX1 of microcontroller U5 is pulled to 0 potential through the third transistor Q3.

[0046] In this embodiment, the magnetic charging device further includes a voltage regulator module, which is electrically connected to the microcontroller U5. By setting up the voltage regulator module, when the first interface P1 / P2 is connected to an external power source, the external power supply voltage regulator module can output a specific voltage to power the microcontroller U5, preventing the microcontroller U5 from being burned out due to excessive voltage.

[0047] In this embodiment, reference Figure 8The voltage regulator module includes a voltage regulator chip U4, a seventh resistor R7, a third capacitor C3, and a fourth capacitor C4. The input terminal of the voltage regulator chip U4 is electrically connected to the first interface P1 / P2, and the output terminal of the voltage regulator chip U4 is electrically connected to the power input terminal VDD of the microcontroller U5. The ground terminal of the voltage regulator chip U4 is used for grounding. The first terminal of the seventh resistor R7 is electrically connected to the first interface P1 / P2, and the second terminal of the seventh resistor R7 is electrically connected to the input terminal of the voltage regulator chip U4. The first terminal of the third capacitor C3 is electrically connected to the second terminal of the seventh resistor R7, and the second terminal of the third capacitor C3 is grounded. The first terminal of the fourth capacitor C4 is electrically connected to the output terminal of the voltage regulator chip U4, and the second terminal of the fourth capacitor C4 is grounded.

[0048] In this embodiment, the voltage regulator chip U4 is model CJ6101B28F.

[0049] In this embodiment, reference Figure 9 The magnetic charging device also includes a temperature detection module, which is electrically connected to the microcontroller U5.

[0050] In this embodiment, reference Figure 9 The temperature detection module includes an eighth resistor R8 and a ninth resistor R9. The first end of the eighth resistor R8 is electrically connected to the output end of the voltage regulator chip U4, the second end of the eighth resistor R8 is electrically connected to the first end of the ninth resistor R9, and the second end of the eighth resistor R8 is electrically connected to the voltage detection terminal PA6 of the microcontroller U5.

[0051] In this embodiment, reference Figure 10 The magnetic charging device also includes an indicator light module, which is electrically connected to the microcontroller U5.

[0052] In this embodiment, reference Figure 7 The magnetic charging device further includes a switch module, which is electrically connected to the charging management module, the first node N, and the microcontroller U5. By including the switch module in the magnetic charging device, which is electrically connected to the charging management module, the first node N, and the microcontroller U5, the switch module can isolate the charging management circuit from the charging protocol module, preventing the output voltage of the charging management module from interfering with the operation of the charging protocol module.

[0053] In this embodiment, reference Figure 7 The magnetic charging device further includes a switch chip U6. The input terminal of the switch chip U6 is electrically connected to the voltage output terminal of the charging management chip U1. The output terminal of the switch chip U6 is electrically connected to the first node N. The enable terminal of the switch chip U6 is electrically connected to the second enable terminal of the microcontroller U5. The ground terminal of the switch chip U6 is used for grounding.

[0054] In this embodiment, the charging management module further includes an inductor L1, the first end of which is electrically connected to the voltage output terminal of the charging management chip U1, and the second end of which is electrically connected to the input terminal of the switching chip U6.

[0055] In this embodiment, the charging management module further includes a fifth capacitor C5, one end of which is electrically connected to the second end of the inductor L1, and the other end of which is grounded.

[0056] In this embodiment, the switch chip U6 is model SGM2564.

[0057] Working principle:

[0058] When the first interface P1 / P2 is connected to an external power supply, the voltage regulator module normally outputs 2.8V to power the microcontroller U5. Pin 15 (VIN) of the charging management chip U1 receives the voltage signal from the external power supply, and the charging management chip U1 operates normally. Simultaneously, when a change is detected in pin 2 (STAT) of the charging management chip U1, it is determined that a powered device is connected to the second interface CHG+. The microcontroller U5 will then send a default pulse signal to set the default charging current. Subsequently, the switching chip U6 is turned off. Then, a single-bus to serial communication circuit is constructed through the charging protocol module to continuously send signals to the second interface CHG+. The protocol for obtaining charging current is sent three times. After the second interface CHG+ receives the current protocol from the powered device, the microcontroller U5's pin 10 PA7+ outputs a signal to turn on the switching chip U6. At the same time, the microcontroller U5's pulse terminal PA5 outputs a corresponding pulse signal to the RC filter circuit. The RC filter circuit converts the corresponding pulse signal output by the microcontroller U5's pulse terminal PA5 into a DC signal and outputs it to the mirror current source module. The mirror current source module generates a mirror current, and the charging management chip U1 adjusts the corresponding charging current according to the mirror current, thereby completing the adjustment of the output current of the charging management module.

[0059] The embodiments described above are merely one of the preferred embodiments of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solutions of the present invention should be included within the protection scope of the present invention.

Claims

1. A magnetic charging device, characterized in that, include: The system comprises a first interface, a charging management module, a charging protocol module, a microcontroller, a mirror current source module, a first node, and a second interface. The charging management module is electrically connected to the first interface, the charging protocol module is electrically connected to the first node, the mirror current source module is electrically connected to the charging management module, and the second interface is electrically connected to the first node. Both the charging protocol module and the mirror current source module are electrically connected to the microcontroller. The first interface is used to connect to an external power source, and the second interface is used to connect to a powered device.

2. The magnetic charging device according to claim 1, characterized in that, The charging management module includes a charging management chip, and the mirror current source module includes a first transistor and a second transistor. The collector of the first transistor is electrically connected to the pulse terminal of the microcontroller, the emitter of the first transistor is grounded, the base of the first transistor is electrically connected to the base of the second transistor, the collector of the second transistor is electrically connected to the charging current detection terminal of the charging management chip, and the emitter of the second transistor is grounded.

3. The magnetic charging device according to claim 2, characterized in that, The magnetic charging device further includes an RC filter module, which is electrically connected to the microcontroller. The mirror current source module is electrically connected to the RC filter module and the charging management module.

4. The magnetic charging device according to claim 3, characterized in that, The RC filter module includes: a first resistor, a first capacitor, a second resistor, a second capacitor, and a third resistor. The first end of the first resistor is electrically connected to the pulse terminal of the microcontroller. The second end of the first resistor is electrically connected to the first end of the second resistor. The second end of the second resistor is electrically connected to the first end of the third resistor. The second end of the third resistor is electrically connected to the collector of the first transistor. The first end of the first capacitor is electrically connected to the second end of the first resistor. The second end of the first capacitor is grounded. The first end of the second capacitor is electrically connected to the second end of the second resistor. The second end of the second capacitor is grounded.

5. The magnetic charging device according to claim 1, characterized in that, The charging protocol module includes a third transistor, a first MOSFET, and a first diode. The base of the third transistor is electrically connected to the transmitting end of the microcontroller, the collector of the third transistor is electrically connected to the receiving end of the microcontroller, the emitter of the third transistor is electrically connected to the input end of the first MOSFET, the output end of the first MOSFET is electrically connected to the first node, the control end of the first MOSFET is electrically connected to the first enable end of the microcontroller, the positive input end of the first diode is electrically connected to the input end of the first MOSFET, and the negative output end of the first diode is electrically connected to the transmitting end of the microcontroller.

6. The magnetic charging device according to claim 1, characterized in that, The magnetic charging device also includes a switch module, which is electrically connected to the charging management module, the first node, and the microcontroller.

7. The magnetic charging device according to claim 6, characterized in that, The magnetic charging device further includes a switching chip. The input terminal of the switching chip is electrically connected to the voltage output terminal of the charging management chip, the output terminal of the switching chip is electrically connected to the first node, the enable terminal of the switching chip is electrically connected to the second enable terminal of the microcontroller, and the ground terminal of the switching chip is used for grounding.

8. The magnetic charging device according to claim 1, characterized in that, The magnetic charging device also includes a voltage regulator module, which is electrically connected to the microcontroller.

9. The magnetic charging device according to claim 1, characterized in that, The magnetic charging device also includes a temperature detection module, which is electrically connected to the microcontroller.

10. The magnetic charging device according to claim 1, characterized in that, The second interface is a magnetic charging interface.

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