TYPE-C charging scheme with overload protection function

Abstract

The invention discloses a TYPE-C charging scheme with an overload protection function, and relates to the technical field of battery charging control. Comprising a signal module, a main control module, a switch module and an alarm module, the signal module is electrically connected with a power adapter, an external load and the main control module, and the main control module is electrically connected with the switch module and the alarm module; through signal acquisition, master control processing, power supply control and alarm mechanisms, the states of the power adapter and the external load can be monitored in real time, and once overload or temperature abnormity is detected, power is cut off and an alarm is given, so that the charging safety is ensured, and meanwhile, output parameters can be intelligently adjusted according to external load requirements, and the charging efficiency is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of battery charging control, and in particular to a TYPE-C charging solution with an overload protection function. Background Art

[0002] In recent years, with the trend of miniaturization and high performance of electronic devices, the requirements for charging speed are getting higher and higher. The USB Type-C interface has become one of the widely accepted standard interfaces in the market with its support for reversible plugging, higher data transfer rate and enhanced power transmission capability (such as USB Power Delivery, USB PD protocol allows power transmission of up to 100W). Existing TYPE-C charging solutions are usually composed of the following key components:

[0003] Power adapter: Responsible for converting AC power into DC power suitable for use by electronic devices.

[0004] Connecting cable: Used to transmit power between the power adapter and the powered device.

[0005] Powered device: such as a smartphone, tablet or other device that supports the TYPE-C interface.

[0006] The Chinese invention patent with publication number CN115378096A discloses a dynamic constant current boost charging circuit, including: a control unit connected to the control ports of the battery pack and the boost DC converter respectively, and the control unit is connected to the communication port of the USB interface through a communication bus; the voltage input terminal VIN of the boost DC converter is connected to the output power VBUS of the charging adapter through the USB interface, and the voltage output terminal VOUT of the boost DC converter is connected to the positive terminal BAT+ of the battery pack; the negative terminal BAT- of the battery pack is connected to the ground GND of the charging adapter through the USB port. Charging control method: when the battery pack detects that the charging adapter is connected, the control unit communicates with the charging adapter to obtain the supported output voltage and current, and detects the total voltage VBAT of the battery pack; selects the highest voltage VAD lower than VBAT, and the control unit instructs the charging adapter to output the voltage for charging. The advantages are: allowing the lithium battery pack to adapt to different charging adapters such as mobile phone and laptop charging adapters for charging, without the need for a dedicated charger; thereby reducing the generation of electronic waste, which is greatly beneficial to environmental protection and resource conservation.

[0007] During the implementation of the above-mentioned and similar charging circuits, although they have basic safety features such as short-circuit protection and overvoltage protection, they often lack effective overload protection mechanisms when faced with complex working conditions, especially when multiple devices are charged at the same time or the demand of a single device exceeds expectations. Summary of the invention

[0008] The purpose of the present invention is to provide a TYPE-C charging solution with an overload protection function to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solution: a TYPE-C charging solution with overload protection function, comprising a signal module, a main control module, a switch module and an alarm module, wherein the signal module is electrically connected to a power adapter, an external load and the main control module, and the main control module is electrically connected to the switch module and the alarm module;

[0010] Signal module: obtains the temperature signal of the power adapter, the temperature signal and the status signal of the external load, and sends the temperature signal and the status signal to the main control module;

[0011] Main control module: sending operation instructions to the switch module and alarm module according to the temperature signal and status signal;

[0012] Switch module: controlling the power connection state of the external load according to the operation instruction;

[0013] Alarm module: sends out an alarm signal according to the operating instruction.

[0014] Furthermore, the signal module includes a connecting unit, a sensing unit and a sampling unit, the connecting unit is electrically connected to the power adapter, the external load, the sampling unit, the main control module and the switch module, and the sensing unit is electrically connected to the main control module.

[0015] Furthermore, the connection unit includes a connector CN1 and a connector CN2, the sampling unit includes a resistor R4, ports 1, 2, 3 and 4 of the connector CN1 are electrically connected to the switch module and the VIN port, port 5 of the connector CN1 is electrically connected to the D+ port, port 7 of the connector CN1 is electrically connected to the D- port, port 11 of the connector CN1 is electrically connected to the CC1 port, the CC1 port and port 12 of the connector CN1 are electrically connected to the main control module, and ports 13, 14, 15, 16 and 17 of the connector CN1 are all grounded;

[0016] Port 1, port 2, port 3 and port 4 of the connector CN2 are all electrically connected to the VOUT port, port 5 of the connector CN2 is electrically connected to the D+ port, port 7 of the connector CN2 is electrically connected to the D- port, port 11 of the connector CN2 is electrically connected to the CC1 port, port 12 of the connector CN2 is electrically connected to the VCON port, ports 13, 14, 15, 16 and 17 of the connector CN2 are all electrically connected to the resistor R4 and the main control module, and the resistor R4 is grounded.

[0017] Furthermore, the connector CN1 is electrically connected to a power adapter, and the connector CN2 is electrically connected to an external load.

[0018] Furthermore, the sensing unit includes a resistor R5, a resistor NTC and a connector J3, the resistor R5 is electrically connected to the main control module and the resistor NTC, the main control module is electrically connected to the connector J3, and the resistor NTC is grounded.

[0019] Furthermore, the main control module includes a chip U1, a chip U2 and a chip U3, a port 1 of the chip U1 is electrically connected to a resistor R5 and a capacitor C2, a port 3 of the chip U1 is electrically connected to a capacitor C1, and the capacitor C1 is electrically connected to a VBUS port, and the capacitor C1, the capacitor C2 and the port 2 of the chip U1 are all grounded;

[0020] Port 1 of the chip U2 is electrically connected to port 2 of the connector J3, port 2 of the chip U2 is electrically connected to port 1 of the connector J3, port 3 of the chip U2 is electrically connected to resistor R5 and resistor NTC, ports 4 and 5 of the chip U2 are electrically connected to the alarm module, port 6 of the chip U2 is grounded, port 7 of the chip U2 is electrically connected to resistor R4, port 9 of the chip U2 is electrically connected to capacitor C3, capacitor C3 is electrically connected to a 3.3V power port, and capacitor C3 is grounded, and port 10 of the chip U2 is electrically connected to a switch module;

[0021] Port 1 of the chip U3 is electrically connected to port 12 of connector CN1, port 2 of the chip U3 is electrically connected to port CC1 and port 11 of connector CN1, port 6 of the chip U3 is grounded, and port 8 of the chip U3 is electrically connected to port VCON.

[0022] Furthermore, the switch module includes a MOS tube Q1, a MOS tube Q2 and a MOS tube Q3, the collector of the MOS tube Q1 is electrically connected to a resistor R6, the resistor R6 is electrically connected to the base of the MOS tube Q2 and the base of the MOS tube Q3, the emitter of the MOS tube Q2 is electrically connected to the emitter of the MOS tube Q3 and the resistor R2, and the resistor R2 is electrically connected to the resistor R6, the base of the MOS tube Q1 is electrically connected to the resistor R1 and the resistor R3, the resistor R1 is electrically connected to the 10 port of the chip U2, the resistor R3 is electrically connected to the emitter of the MOS tube Q1, and the emitter of the MOS tube Q1 and the resistor R3 are both grounded, the collector of the MOS tube Q2 is electrically connected to the VOUT port, and the collector of the MOS tube Q3 is electrically connected to the VIN port.

[0023] Furthermore, the alarm module includes a buzzer J2, port 1 of the buzzer J2 is electrically connected to port 5 of the chip U2, and port 2 of the buzzer J2 is electrically connected to port 4 of the chip U2.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Firstly, the present invention can monitor the status of the power adapter and the external load in real time through signal acquisition, main control processing, power control and alarm mechanism. Once overload or temperature abnormality is detected, the power is immediately cut off and an alarm is sounded, thereby ensuring charging safety. At the same time, the output parameters can be intelligently adjusted according to the external load requirements to optimize the charging efficiency.

[0026] Second: the present invention enables the adapter to output the best voltage and current that meet the load requirements through communication between the chip U3 and the adapter, thereby achieving efficient power transmission and extending the service life of the device;

[0027] Thirdly, the present invention provides a stable 3.3V power supply for the control system through the chip U1, thereby ensuring that the chip U2 can operate normally under various working conditions, thereby enhancing the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a system block diagram of the TYPE-C charging solution of the present invention;

[0029] Figure 2 This is a circuit diagram of the TYPE-C charging solution of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the process of specific implementation, the existing charging circuit has basic safety features, such as short circuit protection, overvoltage protection, etc., but when faced with complex working conditions, especially when multiple devices are charged at the same time or the demand of a single device exceeds expectations, these chargers often lack effective overload protection mechanisms. The technical solution of this application can monitor the status of the power adapter and external load in real time through signal acquisition, main control processing, power control and alarm mechanism. Once an overload or temperature abnormality is detected, the power is immediately cut off and an alarm is sounded, thereby ensuring charging safety. At the same time, it can also intelligently adjust the output parameters according to the external load demand to optimize the charging efficiency.

[0032] refer to Figure 1 and Figure 2 This embodiment provides a TYPE-C charging solution with an overload protection function, and the TYPE-C charging solution includes a signal module, a main control module, a switch module, and an alarm module, wherein the signal module includes a connection unit, a sensing unit, and a sampling unit. Specifically, the connection unit is electrically connected to a power adapter, an external load, a sampling unit, a main control module, and a switch module, while the sensing unit is electrically connected to the main control module, and the main control module is electrically connected to the switch module and the alarm module.

[0033] Specifically, the signal module is used to obtain the temperature signal of the power adapter, the temperature signal and the status signal of the external load, and send the obtained temperature signal and status signal to the main control module. The main control module is used to send operating instructions to the switch module and the alarm module according to the sent temperature signal and status signal. The switch module is used to control the power connection state of the external load, that is, the conduction and disconnection of the external load power supply according to the operating instructions sent by the main control module. The alarm module is used to send an alarm signal according to the operating instructions sent by the main control module.

[0034] In this embodiment, the connection unit includes a connector CN1 (for example, model SHELL) and a connector CN2 (for example, model SHELL), the sampling unit includes a resistor R4, port 1, port 2, port 3 and port 4 of the connector CN1 are electrically connected to the switch module and the VIN port, port 5 of the connector CN1 is electrically connected to the D+ port, port 7 of the connector CN1 is electrically connected to the D- port, port 11 of the connector CN1 is electrically connected to the CC1 port, the CC1 port and port 12 of the connector CN1 are electrically connected to the main control module, and port 13, port 14, port 15, port 16 and port 17 of the connector CN1 are all grounded.

[0035] Further, ports 1, 2, 3, and 4 of connector CN2 are electrically connected to the VOUT port, port 5 of connector CN2 is electrically connected to the D+ port, port 7 of connector CN2 is electrically connected to the D- port, port 11 of connector CN2 is electrically connected to the CC1 port, port 12 of connector CN2 is electrically connected to the VCON port, ports 13, 14, 15, 16, and 17 of connector CN2 are electrically connected to resistor R4 and the main control module, and resistor R4 is grounded. It is worth noting that connector CN1 in this embodiment is electrically connected to the power adapter, and connector CN2 is electrically connected to the external load.

[0036] Furthermore, the sensing unit includes a resistor R5, a resistor NTC and a connector J3, the resistor R5 is electrically connected to the main control module and the resistor NTC, the main control module is electrically connected to the connector J3, and the resistor NTC is grounded.

[0037] In this embodiment, the main control module includes chip U1, chip U2 (control chip, such as MT7632 / MT7633) and chip U3 (protocol chip, such as CYPD3175), port 1 of chip U1 is electrically connected to resistor R5 and capacitor C2, port 3 of chip U1 is electrically connected to capacitor C1, capacitor C1 is electrically connected to VBUS port, and capacitor C1, capacitor C2 and port 2 of chip U1 are all grounded.

[0038] Further, port 1 of chip U2 is electrically connected to port 2 of connector J3, port 2 of chip U2 is electrically connected to port 1 of connector J3, port 3 of chip U2 is electrically connected to resistor R5 and resistor NTC, port 4 and port 5 of chip U2 are both electrically connected to the alarm module, port 6 of chip U2 is grounded, port 7 of chip U2 is electrically connected to resistor R4, port 9 of chip U2 is electrically connected to capacitor C3, capacitor C3 is electrically connected to the 3.3V power supply port, and capacitor C3 is grounded, and port 10 of chip U2 is electrically connected to the switch module.

[0039] Further, port 1 of chip U3 is electrically connected to port 12 of connector CN1, port 2 of chip U3 is electrically connected to port CC1 and port 11 of connector CN1, port 6 of chip U3 is grounded, and port 8 of chip U3 is electrically connected to port VCON.

[0040] In this embodiment, the switch module includes a MOS tube Q1, a MOS tube Q2 and a MOS tube Q3 (the model of the MOS tube Q1 is set to WNM3013-3 / 50V, and the models of the MOS tube Q2 and the MOS tube Q3 are set to MTD7D5P04V8), the collector of the MOS tube Q1 is electrically connected to the resistor R6, the resistor R6 is electrically connected to the base of the MOS tube Q2 and the base of the MOS tube Q3, and the emitter of the MOS tube Q2 is electrically connected to the emitter of the MOS tube Q3 and the resistor R2, and the resistor R2 is electrically connected to the resistor R6, and the base of the MOS tube Q1 is electrically connected to the resistor R1 and the resistor R3, the resistor R1 is electrically connected to the 10 port of the chip U2, the resistor R3 is electrically connected to the emitter of the MOS tube Q1, and the emitter of the MOS tube Q1 and the resistor R3 are both grounded, the collector of the MOS tube Q2 is electrically connected to the VOUT port, and the collector of the MOS tube Q3 is electrically connected to the VIN port.

[0041] In this embodiment, the alarm module includes a buzzer J2, port 1 of the buzzer J2 is electrically connected to port 5 of the chip U2, and port 2 of the buzzer J2 is electrically connected to port 4 of the chip U2.

[0042] In the specific implementation process, the connector CN1 is connected to the power adapter, the connector CN2 is connected to the external load, and the resistor NTC is connected to the 3-port of the chip U2 to sense the temperature of the load-end connector. It is worth noting that the temperature sensor in this embodiment is set separately and can be directly set on the internal PCB board of the load or at any external position. Furthermore, when the TYPE-C charging solution in this embodiment is in normal operation, the current is input from the connector CN1, flows through the MOS tube Q2 and the MOS tube Q3, and is output from the connector CN2 to power the external load.

[0043] Specifically, when the external load is overloaded, the current across the resistor R4 will change. The chip U2 is connected to the resistor R4 through ports 6 and 7. It is worth noting that when the current obtained at the resistor R4 is the same as the preset current threshold, the chip U2 will output a high level through port 10 and control the MOS tubes Q1, Q2 and Q3 to be disconnected, that is, the power supply to the external load is stopped. At the same time, the chip U2 sends an operating instruction to the buzzer J2 through ports 4 and 5, so that the buzzer J2 generates an alarm signal.

[0044] Furthermore, when the temperature of the power adapter, i.e., the charging cable body, is too high, the resistance of the resistor NTC becomes smaller, and the chip U2 is connected to the resistor NTC through port 3. At the same time, when the resistance of the resistor NTC obtained drops to the first preset resistance threshold, the chip U2 outputs a high level through port 10, and the MOS tubes Q1, Q2, and Q3 are disconnected, that is, the power supply to the external load is stopped. At the same time, the chip U2 sends an operating instruction to the buzzer J2 through ports 4 and 5, so that the buzzer J2 generates an alarm signal.

[0045] Furthermore, when the temperature at the external load is too high, the resistance of connector J3 decreases, and chip U2 is connected to connector J3 through port 1 and port 2. When the resistance at connector J3 obtained drops to a second preset resistance threshold, chip U2 outputs a high level through port 10, and MOS tubes Q1, Q2 and Q3 are disconnected, that is, the power supply to the external load is stopped. At the same time, chip U2 sends an operating instruction to buzzer J2 through port 4 and port 5, causing buzzer J2 to generate an alarm signal.

[0046] Furthermore, chip U3 communicates with the adapter via a protocol so that the adapter outputs the voltage and current required by the external load. Chip U1 provides a stable 3.3V power supply for chip U2, and chip U2 is used to execute the above control program.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A TYPE-C charging solution with overload protection function, characterized in that: It includes a signal module, a main control module, a switch module and an alarm module, wherein the signal module is electrically connected to a power adapter, an external load and the main control module, and the main control module is electrically connected to the switch module and the alarm module; Signal module: obtains the temperature signal of the power adapter, the temperature signal and the status signal of the external load, and sends the temperature signal and the status signal to the main control module; Main control module: sending operation instructions to the switch module and alarm module according to the temperature signal and status signal; Switch module: controlling the power connection state of the external load according to the operation instruction; Alarm module: sends out an alarm signal according to the operating instruction.

2. A TYPE-C charging solution with overload protection function according to claim 1, characterized in that: The signal module includes a connecting unit, a sensing unit and a sampling unit. The connecting unit is electrically connected to a power adapter, an external load, a sampling unit, a main control module and a switch module, and the sensing unit is electrically connected to the main control module.

3. A TYPE-C charging solution with overload protection function according to claim 2, characterized in that: The connection unit includes a connector CN1 and a connector CN2, the sampling unit includes a resistor R4, ports 1, 2, 3 and 4 of the connector CN1 are electrically connected to the switch module and the VIN port, port 5 of the connector CN1 is electrically connected to the D+ port, port 7 of the connector CN1 is electrically connected to the D- port, port 11 of the connector CN1 is electrically connected to the CC1 port, the CC1 port and port 12 of the connector CN1 are electrically connected to the main control module, and ports 13, 14, 15, 16 and 17 of the connector CN1 are all grounded; Port 1, port 2, port 3 and port 4 of the connector CN2 are all electrically connected to the VOUT port, port 5 of the connector CN2 is electrically connected to the D+ port, port 7 of the connector CN2 is electrically connected to the D- port, port 11 of the connector CN2 is electrically connected to the CC1 port, port 12 of the connector CN2 is electrically connected to the VCON port, ports 13, 14, 15, 16 and 17 of the connector CN2 are all electrically connected to the resistor R4 and the main control module, and the resistor R4 is grounded.

4. A TYPE-C charging solution with overload protection function according to claim 3, characterized in that: The connector CN1 is electrically connected to a power adapter, and the connector CN2 is electrically connected to an external load.

5. A TYPE-C charging solution with overload protection function according to claim 2, characterized in that: The sensing unit includes a resistor R5, a resistor NTC and a connector J3. The resistor R5 is electrically connected to the main control module and the resistor NTC. Meanwhile, the main control module is electrically connected to the connector J3, and the resistor NTC is grounded.

6. A TYPE-C charging solution with overload protection function according to claim 1 or 2 or 3 or 5, characterized in that: The main control module includes a chip U1, a chip U2 and a chip U3, a port 1 of the chip U1 is electrically connected to a resistor R5 and a capacitor C2, a port 3 of the chip U1 is electrically connected to a capacitor C1, and the capacitor C1 is electrically connected to a VBUS port, and the capacitor C1, the capacitor C2 and the port 2 of the chip U1 are all grounded; Port 1 of the chip U2 is electrically connected to port 2 of the connector J3, port 2 of the chip U2 is electrically connected to port 1 of the connector J3, port 3 of the chip U2 is electrically connected to resistor R5 and resistor NTC, ports 4 and 5 of the chip U2 are electrically connected to the alarm module, port 6 of the chip U2 is grounded, port 7 of the chip U2 is electrically connected to resistor R4, port 9 of the chip U2 is electrically connected to capacitor C3, capacitor C3 is electrically connected to a 3.3V power port, and capacitor C3 is grounded, and port 10 of the chip U2 is electrically connected to a switch module; Port 1 of the chip U3 is electrically connected to port 12 of connector CN1, port 2 of the chip U3 is electrically connected to port CC1 and port 11 of connector CN1, port 6 of the chip U3 is grounded, and port 8 of the chip U3 is electrically connected to port VCON.

7. A TYPE-C charging solution with overload protection function according to claim 6, characterized in that: The switch module includes a MOS tube Q1, a MOS tube Q2 and a MOS tube Q3. The collector of the MOS tube Q1 is electrically connected to a resistor R6, and the resistor R6 is electrically connected to the base of the MOS tube Q2 and the base of the MOS tube Q3. At the same time, the emitter of the MOS tube Q2 is electrically connected to the emitter of the MOS tube Q3 and the resistor R2, and the resistor R2 is electrically connected to the resistor R6. At the same time, the base of the MOS tube Q1 is electrically connected to the resistor R1 and the resistor R3. The resistor R1 is electrically connected to the 10 port of the chip U2. The resistor R3 is electrically connected to the emitter of the MOS tube Q1, and the emitter of the MOS tube Q1 and the resistor R3 are both grounded. The collector of the MOS tube Q2 is electrically connected to the VOUT port, and the collector of the MOS tube Q3 is electrically connected to the VIN port.

8. A TYPE-C charging solution with overload protection function according to claim 6, characterized in that: The alarm module includes a buzzer J2, wherein port 1 of the buzzer J2 is electrically connected to port 5 of the chip U2, and port 2 of the buzzer J2 is electrically connected to port 4 of the chip U2.

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