Portable WiFi arrearage control and power control device for multi-port power bank

Abstract

The utility model relates to the technical field of portable WiFi, and provides a portable WiFi arrearage control device of a single-port power bank, the device comprises a main control system, a charging chip, an operational amplifier chip, a joint detection module, a key control module and a first TYPE connector, the main control system is connected with the key control module, the key control module comprises an NMOS tube, the drain electrode of the NMOS tube is connected with the key pin of the charging chip, and the operational amplifier chip is connected with the key pin of the charging chip. The source electrode is grounded, the grid electrode is connected with the control pin of the main control system, and the main control system is used for inquiring the charge state, controlling the key pin of the charging chip through the control pin according to the charge state and controlling the power output of the output port of the charging chip according to the charge state. According to the invention, common materials such as the operational amplifier chip and the MOS tube are adopted, so that the circuit has the advantages of low cost, high stability and high practicability.

Description

Technical Field

[0001] This application relates to the field of portable WiFi technology, specifically to a device for controlling overdue payments and power of a multi-port portable WiFi device in a power bank. Background Technology

[0002] Portable Wi-Fi devices are those that convert 2G, 3G, 4G, and 5G networks into Wi-Fi signals, meeting the network needs of business travelers and tourists who rely on mobile work. In addition to basic Wi-Fi functionality, an increasing number of portable Wi-Fi devices are also compatible with power bank functions; these devices are called portable Wi-Fi power banks.

[0003] With the increasing demand for faster charging speeds, power banks have become increasingly powerful, with 18W, 22.5W, and 65W models emerging one after another. This high-power output poses a significant challenge to portable Wi-Fi combo devices. Firstly, high power inevitably generates a lot of heat, which directly impacts the network performance of the portable Wi-Fi. Secondly, due to the battery's internal resistance and voltage drop along the path, high-power discharge can cause a voltage drop of over 0.5V. Since portable Wi-Fi systems operate at a voltage above 3.4V, the power bank should not continue high-power output when the battery voltage is below 3.9V. Utility Model Content

[0004] To help solve the above-mentioned technical problems, this application provides a device for overdue payment control and power control of a multi-port portable WiFi power bank, adopting the following technical solution:

[0005] A device for controlling overdue payments and power consumption of a multi-port portable WiFi power bank, wherein the device includes a charging chip, a main control system, a level conversion chip, and a voltage divider module. One end of the level conversion chip is connected to the I2C signal terminal of the charging chip, and the other end is connected to the I2C signal terminal of the main control system. The output terminal of the voltage divider module is connected to the main control system.

[0006] The charging chip has a charging chip register, the voltage divider module has an NTC resistor for associating with the temperature value, and the main control system has a power supply voltage terminal. The I2C signal terminal of the main control system is used to control the charging chip register according to the temperature value and the power supply voltage of the power supply voltage terminal, so as to control the power output of the charging chip output port, and is also used to control the power output of the charging chip output port according to the cost status.

[0007] Preferably, the device further includes an interrupt conversion module, wherein the interrupt signal terminal of the charging chip is connected to the interrupt signal terminal of the interrupt conversion module, and the interrupt conversion module is used to convert the interrupt signal of the charging chip into a power-on trigger signal for triggering the main control system to power on.

[0008] Preferably, the interrupt conversion module is equipped with an interrupt conversion diode, the anode of which is connected to the interrupt signal terminal of the charging chip, and the cathode is connected to the main control system.

[0009] Preferably, the device further includes a TYPE-C connector and a TYPE-A connector, with the power supply terminal of the charging chip connected to the power supply terminal of the TYPE-C connector and the output terminal of the charging chip connected to the TYPE-A connector.

[0010] Preferably, the voltage divider module is also equipped with a voltage divider resistor. One end of the NTC resistor is grounded, and the other end is connected to the input terminal of the voltage divider resistor. The output terminal of the voltage divider resistor is connected to the main control system.

[0011] Preferably, the main control system is a 4G or 5G communication platform, the charging chip is IP5353_I2C_AACL, the NTC resistor is SDNT1608X473F3950FTF, the level conversion chip is SGM4574, and the interrupt conversion diode is SIG631E30T1G.

[0012] In summary, the overdue payment control and power control device for a multi-port portable WiFi power bank of this application uses common materials such as level conversion chips, NTC resistors, and Schottky diodes, which are highly stable, low in cost, and highly practical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an embodiment of a multi-port portable WiFi power bank overdue payment control and power control device according to this application;

[0014] Figure 2 for Figure 1 A schematic diagram of the structure of the charging chip U1 in the embodiment shown;

[0015] Figure 3 for Figure 1 A schematic diagram of the level conversion chip U2 in the embodiment shown;

[0016] Figure 4 for Figure 1 The schematic diagram of the voltage divider module MODULE_1 in the embodiment shown is as follows;

[0017] Figure 5 for Figure 1 The diagram shown is a structural schematic of the interrupt conversion module MODULE_2 in the embodiment shown.

[0018] Figure 6 for Figure 1 The schematic diagram of the TYPE-C connector in the embodiment shown is as follows;

[0019] Figure 7 for Figure 1 The schematic diagram of the TYPE-A1 connector in the embodiment shown is as follows;

[0020] Figure 8 for Figure 1 The schematic diagram of the TYPE-A2 connector in the embodiment shown is as follows;

[0021] Figure 9 for Figure 1 The schematic diagram of the main control system HOST1 in the embodiment shown is as follows;

[0022] Figure 10 for Figure 1 A schematic diagram of the structure of lithium battery BAT1 in the embodiment shown. Detailed Implementation

[0023] The present application will be further described below with reference to the accompanying drawings. The structure and principle of the present application are very clear to those skilled in the art. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of a multi-port portable WiFi power bank with overdue payment control and power control device according to this application. Figure 2 for Figure 1 The schematic diagram of the charging chip U1 in the embodiment shown is as follows. Figure 3 for Figure 1 The schematic diagram of the level conversion chip U2 in the embodiment shown is as follows. Figure 4 for Figure 1 The schematic diagram of the voltage divider module MODULE_1 in the illustrated embodiment is shown. Figure 5 for Figure 1 The diagram shows the structure of the interrupt conversion module MODULE_2 in the illustrated embodiment. Figure 6 for Figure 1 A schematic diagram of the structure of lithium battery BAT1 in the embodiment shown.

[0025] Combination Figures 1 to 6It is understood that the device of this application includes a charging chip U1, a main control system HOST1, a level conversion chip U2, a voltage divider module MODULE_1, an interrupt conversion module MODULE_2, a TYPE-C connector, and two TYPE-A connectors. One end of the level conversion chip is connected to the I2C signal terminals (SDA and SCL) of the charging chip, and the other end is connected to the I2C signal terminals (SDA_HOST and SCL_HOST) of the main control system. The output terminal of the voltage divider module is connected to the main control system HOST1. The charging chip has a charging chip register, and the voltage divider module has an NTC resistor R1 for associating with the temperature value. The main control system has a power supply voltage terminal VBAT. The I2C signal terminal of the main control system is used to control the charging chip register according to the temperature value and the power supply voltage of the power supply voltage terminal, so as to control the power output of the charging chip output port, and is also used to control the charging chip register according to the fee status, thereby controlling the power output of the charging chip output port. The interrupt signal terminal (INT) of the charging chip is connected to the interrupt signal terminal of the interrupt conversion module. The interrupt conversion module is used to convert the interrupt signal of the charging chip into a power-on trigger signal for triggering the main control system to power on.

[0026] The interrupt conversion module is equipped with an interrupt conversion diode D1. The anode of the interrupt conversion diode is connected to the interrupt signal terminal of the charging chip, and the cathode is connected to the main control system.

[0027] The power supply terminal (VBUS) of the charging chip is connected to the power supply terminal of the TYPE-C connector, and the output terminal of the charging chip is connected to the TYPE-A connector. The voltage divider module also includes a voltage divider resistor R2. One end of the NTC resistor R1 is grounded, and the other end is connected to the input terminal of the voltage divider resistor. The output terminal of the voltage divider resistor is connected to the main control system.

[0028] In this embodiment, the main control system can be a 4G or 5G communication platform, the charging chip can be IP5353_I2C_AACL, the NTC resistor is SDNT1608X473F3950FTF, the level conversion chip is SGM4574, and the interrupt conversion diode is SIG631E30T1G.

[0029] Main control system: Responsible for functions such as radio frequency processing, WiFi transmission, account and password settings, charging detection, power bank output control, and power bank power control. Preferably, a 4G or 5G communication platform is used.

[0030] Charging chip: Used to input power from the TYPE-C connector to the lithium battery, and to output power from the lithium battery through the TYPE-C and TYPE-A connectors. In this device, the charging chip is preferably IP5353_I2C_AACL.

[0031] TYPE-C connector: Used to connect an adapter for power input and convert battery power to TYPE-C output.

[0032] TYPE-A connector: Used to output power from the power bank.

[0033] Lithium-ion battery (BAT1): Powers the portable WiFi and stores electricity.

[0034] Level conversion chip: Used to perform level matching between the I2C and interrupt signals of the charging chip and the I2C and interrupt signals of the host control system HOST1. In this device, the level conversion chip is preferably SGM4574.

[0035] Voltage divider module: Composed of NTC resistors and pull-up resistors, etc., it is used to convert the resistance change of the NTC resistor into a voltage change, thereby realizing temperature monitoring.

[0036] Interrupt conversion module: Used to convert the interrupt signal of the charging chip into a power-on trigger signal that triggers the main control system HOST1 to power on.

[0037] Specifically, the function of a single charging chip is relatively basic, mainly performing mechanical protocol handshakes and turning charging and discharging on and off. For more intelligent control, an external MCU (Microcontroller Unit) is considered the preferred solution. However, due to cost sensitivity and efficiency priorities, using an external MCU not only increases costs but also causes inconvenience to production and R&D due to debugging and downloading work.

[0038] Considering that portable WiFi devices already have 4G or 5G platforms as the main control system, this system also has the potential to control power banks. However, due to power consumption issues, the main control system cannot remain powered on for extended periods like an MCU. Therefore, it is necessary to activate the main control system, switching it from a powered-off state to a powered-on state.

[0039] Based on the characteristics of the charging chip, this application discovers that the charging chip has an INT (interrupt) signal. When the power bank is in working mode, it notifies the MCU to perform I2C read / write operations. Importantly, the level of the INT signal is equal to the VBAT voltage, which is sufficient to meet the activation condition of the main control system (VBUS_DET > 3.3V). Therefore, by connecting the INT signal to VBUS_DET through a diode, this application can successfully activate the main control system.

[0040] Under normal conditions, the charging chip U1 is in sleep mode, and its INT signal is in a high-impedance state. Once the DP or DM pins of the TYPE-A or TYPE-C connector, or the CC1 or CC2 pins of the TYPE-C connector, successfully handshake with the peripheral device using protocols such as QC2.0 / QC3.0 or USB C DRP, the charging chip will enter the working mode, and its INT signal will become high. At this time, using the interrupt conversion module MODULE_2, this application can connect the INT signal to the power-on trigger VBUS_DET signal of the host system HOST1 through a Schottky diode, thereby changing the host system from the power-off state to the power-on state.

[0041] After the main control system HOST1 is powered on, it checks whether the current device is in arrears and decides whether to shut down the power output of each output port. The power control of the charging chip U1 and the switching control of each output port can be configured through its internal registers. In this application, the I2C signal is matched with the main control system HOST1 through the level conversion chip U2, so that the main control system can effectively control the various states of the charging chip U1.

[0042] It should be noted that in the initial state of the device, the FLASH memory is filled with an arrears flag of "1" by default. After successful payment and recharge, network communication with the backend can be established, and the backend will send a notification to the device, rewriting the arrears flag in the FLASH memory to "0". When the arrears are about to occur, the backend will send a notification again, rewriting the arrears flag to "1". The main control system HOST1 can determine whether the device is in arrears by querying the arrears flag.

[0043] To monitor device temperature and prevent overheating, this application uses a voltage divider module MODULE_1. This module consists of an NTC resistor R2 and a pull-up resistor R1, powered by a VDD1V85, and its output is connected to the TEMP_ADC of the main control system. The resistance of the NTC resistor changes with temperature, thus altering the voltage of the TEMP_ADC. By measuring this voltage and referring to the voltage-temperature relationship, this application can obtain the current motherboard temperature. Once the temperature exceeds 60°C, the main control system will control the register of the charging chip via I2C to stop the high-power fast charging output of each output port and switch to a basic 10W output of 5V / 2A.

[0044] Additionally, when the charging chip is outputting high power, if the battery voltage drops below 3.9V, due to a voltage drop of approximately 0.5V, the VBAT supply voltage of the main control system may drop below 3.4V, causing the device to shut down and thus disabling the portable Wi-Fi function. Therefore, when the main control system detects that the VBAT voltage is below 3.9V, it will also control the charging chip's register via I2C to stop the high-power fast charging output and only provide a basic 10W output of 5V / 2A.

Claims

1. A device for controlling overdue payments and power consumption of a multi-port portable WiFi power bank, characterized in that, The device includes a charging chip, a main control system, a level conversion chip, and a voltage divider module. One end of the level conversion chip is connected to the I2C signal terminal of the charging chip, and the other end is connected to the I2C signal terminal of the main control system. The output terminal of the voltage divider module is connected to the main control system. The charging chip has a charging chip register, the voltage divider module has an NTC resistor for associating with the temperature value, the main control system has a power supply voltage terminal, and the I2C signal terminal of the main control system is used to control the charging chip register according to the temperature value and the power supply voltage of the power supply voltage terminal, so as to control the power output of the charging chip output port.

2. The overdue payment control and power control device for multi-port portable WiFi power banks according to claim 1, characterized in that, The device also includes an interrupt conversion module. The interrupt signal terminal of the charging chip is connected to the interrupt signal terminal of the interrupt conversion module. The interrupt conversion module is used to convert the interrupt signal of the charging chip into a power-on trigger signal for triggering the main control system to power on. The I2C signal terminal of the main control system is used to control the register of the charging chip according to the cost status, so as to control the power output of the charging chip output port.

3. The overdue payment control and power control device for multi-port portable WiFi power banks according to claim 2, characterized in that, The interrupt conversion module is equipped with an interrupt conversion diode. The anode of the interrupt conversion diode is connected to the interrupt signal terminal of the charging chip, and the cathode is connected to the main control system.

4. The overdue payment control and power control device for multi-port portable WiFi power banks according to claim 1, characterized in that, The device also includes a TYPE-C connector and a TYPE-A connector. The power supply terminal of the charging chip is connected to the power supply terminal of the TYPE-C connector, and the output terminal of the charging chip is connected to the TYPE-A connector.

5. The overdue payment control and power control device for multi-port portable WiFi power banks according to claim 1, characterized in that, The voltage divider module also includes a voltage divider resistor. One end of the NTC resistor is grounded, and the other end is connected to the input of the voltage divider resistor. The output of the voltage divider resistor is connected to the main control system.

6. The overdue payment control and power control device for multi-port portable WiFi power banks according to claim 1, characterized in that, The main control system is a 4G or 5G communication platform, the charging chip is IP5353_I2C_AACL, the NTC resistor is SDNT1608X473F3950FTF, the level conversion chip is SGM4574, and the interrupt conversion diode is SIG631E30T1G.

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