1、 Requirements for battery design scheme of portable B-ultrasound machine:
Portable B-ultrasound machine is convenient for medical personnel to carry out movable indoor and outdoor operations, and providing continuous, efficient and stable mobile power supply has become the greatest guarantee for the normal operation of such equipment. The scheme adopts high-performance cell, so that the whole battery has the characteristics of high energy ratio, light weight, small volume, high cycle life, high safety and high consistency. The power management scheme adopts the highly intelligent SBS battery management system to effectively manage the safety and power of the battery.
2、 Battery design scheme of portable B-ultrasound machine:
1) Protection board (PCM): it is mainly a protection circuit designed for rechargeable intelligent battery pack. Due to the chemical characteristics of lithium battery, it is necessary to provide protection functions such as intelligent power calculation, overcharge, over discharge, short circuit, overcurrent and over temperature. To avoid burning, explosion and other hazards.
2) AFE / IC (Protection IC): the main protection function chip of the design scheme, which can monitor the functions of overcharge, over discharge, over-current and short circuit on-line. Make the cell work in a safe, stable and efficient range.
3) 18650 lithium ion cell: 18650 Li ion cell (bak).
4) Field effect transistor (MOSFET): MOSFET tube plays a switching role in the protection circuit, so that the voltage at both ends of the load will not increase or decrease, so as to ensure voltage stability.
5) Power management control chip (bq2085): a fully functional power detector with an analog-to-digital converter (ADC) for measuring voltage and temperature and an analog-to-digital converter for measuring current and charging sensing. The electricity detector has a microprocessor, which is responsible for performing electricity detection and can provide information such as the remaining state of capacity. Bq2085 chip also provides the remaining run time to empty. The host can query the information from the electricity detector at any time and notify the user of the battery information. The electricity detector is very convenient to use, so that users can master the battery energy at any time.
6) Battery pack packaging: rubber shell.
