一种抗压型拉杆箱

Abstract

本实用新型公开了一种抗压型拉杆箱，属于拉杆箱技术领域，解决了定位电路使用中，锂电池低温下因4G模块瞬时大电流供电，输出电压骤降；若电压低于保护板预设最低阈值，会触发锁定，致设备运行中断电无法开机；且锁定有保持性，温度回升、电压恢复也无法自行解锁，需外部充电复位，锁定期间定位系统完全失效的问题。包括箱体。本实用新型当中的抗低温瞬时压降定位电路通过内部并联的大容量电容提供瞬时大电流供应，同时利用单向导通元件隔离电池回路，使锂电池在4G模块工作时避免直接承受大电流负荷，从而维持其端电压始终高于保护板锁定阈值，从根本上防止了低温环境下保护电路的误触发锁定，确保了定位电路的持续正常工作。

Claims

1. A compression-type trolley case comprising a case body (1), and a positioner arranged in the case body (1), characterized in that, The positioner includes a housing fixedly connected inside the housing (1) and a low-temperature instantaneous voltage drop positioning circuit installed inside the housing. The low-temperature instantaneous voltage drop positioning circuit maintains its terminal voltage stability by using internal energy storage to supply instantaneous high power and isolate the battery circuit in a low-temperature environment.

2. The compression-type trolley suitcase according to claim 1, wherein, The anti-low temperature instantaneous voltage drop positioning circuit includes a power supply module (2), a main control module (3), a communication module (4), and a positioning module (5). The output terminal of the power supply module (2) is connected to the power input terminal of the main control module (3), the power input terminal of the communication module (4), and the power input terminal of the positioning module (5) to provide working power. The first data communication terminal of the main control module (3) is connected to the data communication terminal of the communication module (4) to control the communication module (4) and transmit data. The second data communication terminal of the main control module (3) is connected to the data communication terminal of the positioning module (5) to obtain positioning data.

3. The compression-type suitcase of claim 2, wherein, The power module (2) includes a lithium battery, a battery protection chip, a Schottky diode, a large-capacity energy storage capacitor, and a low-dropout linear regulator. The positive and negative terminals of the lithium battery are used to provide electrical energy. The power input port of the battery protection chip is connected to the positive and negative terminals of the lithium battery. The anode of the Schottky diode is connected to the positive output terminal of the battery protection chip. The positive terminal of the large-capacity energy storage capacitor is connected to the cathode of the Schottky diode. The negative terminal of the large-capacity energy storage capacitor is connected to the system ground. The cathode of the Schottky diode forms the main power supply line. The voltage input terminal of the low-dropout linear regulator is connected to the main power supply line. The voltage output terminal of the low-dropout linear regulator outputs the operating voltage. The ground terminal of the low-dropout linear regulator is connected to the system ground.

4. The compression-type draw-bar suitcase of claim 3, wherein, The main control module (3) includes a microcontroller STM32L071CBT6. The power supply pin of the microcontroller STM32L071CBT6 is connected to the voltage output terminal of the low dropout linear regulator. The ground pin of the microcontroller STM32L071CBT6 is connected to the system ground. The first serial port transmit pin and the first serial port receive pin of the microcontroller STM32L071CBT6 constitute the first data communication terminal of the main control module (3). The second serial port transmit pin and the second serial port receive pin of the microcontroller STM32L071CBT6 constitute the second data communication terminal of the main control module (3).

5. The compression-type suitcase of claim 2, wherein, The communication module (4) includes a P-MOSFET switch and a 4G communication module. The source of the P-MOSFET switch is connected to the main power supply line in the power supply module (2). The drain of the P-MOSFET switch outputs the working power of the 4G communication module. The gate of the P-MOSFET switch is connected to the general-purpose input / output pin of the microcontroller STM32L071CBT6 in the main control module (3) through a current-limiting resistor. The power input pin of the 4G communication module is connected to the drain of the P-MOSFET switch. The ground pin of the 4G communication module is connected to the system ground. The serial port receiving pin and the serial port sending pin of the 4G communication module constitute the data communication terminal of the communication module (4). The serial port receiving pin and the serial port sending pin of the 4G communication module are respectively connected to the first serial port sending pin and the first serial port receiving pin of the microcontroller STM32L071CBT6 in the main control module (3). The gate of the P-MOSFET switch is connected to the system ground through a pull-down resistor.

6. A pressure-resistant trolley case according to claim 2, characterized in that, The positioning module (5) includes a GPS positioning module. The power input pin of the GPS positioning module is connected to the voltage output terminal of the low-dropout linear regulator in the power module (2). The ground pin of the GPS positioning module is connected to the system ground. The serial port receiving pin and the serial port sending pin of the GPS positioning module constitute the data communication terminal of the positioning module (5). The serial port receiving pin and the serial port sending pin of the GPS positioning module are respectively connected to the second serial port sending pin and the second serial port receiving pin of the microcontroller STM32L071CBT6 in the main control module (3).

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