12V Lithium Battery Pack-Application Scheme of Ultrasonic Flowmeter Lithium Battery Pack
一、 Introduction of Ultrasonic Flowmeter
The pipe segment ultrasonic flow meter is an instrument that measures the flow of liquid in a round pipe based on the principle of the "speed difference method". It adopts advanced multi-pulse technology, signal digital processing technology, and error correction technology to make the flow meter more adaptable to the environment of the industrial site, and the measurement is more convenient, economical, and accurate. The products have reached the advanced level at home and abroad and can be widely used in petroleum, chemical industry, metallurgy, electric power, water supply, and drainage, and other fields.
二、 Requirements for Ultrasonic Flowmeter Lithium Battery Pack
The working current of the ultrasonic flowmeter is about 1.5-2A, it requires continuous work for 3 hours, and the cycle life is required to reach more than 2000 times. Therefore, our company uses BAK batteries to combine. The battery has a high energy ratio, lightweight, small volume, High cycle life, high safety, high voltage consistency, and other advantages.
三、 power plan
Portable integrated flue gas analyzer lithium battery protection function
1. Protection Board (PCM): It is mainly a protection circuit designed for rechargeable lithium battery packs. Due to the chemical characteristics of lithium batteries, it is necessary to provide protection functions such as intelligent power calculation, overcharge, over-discharge, short circuit, and overcurrent. In order to avoid dangers such as burning and explosion.
2. Protection IC (Protection IC): The main protection function chip of the design scheme, which performs online monitoring of the functions of overcharging, over-discharging, overcurrent, short circuit, and so on, so that the batteries can work in a safe, stable and efficient range.
3. Temperature switch: Mainly designed for temperature protection function. When the temperature of the battery itself reaches the range of 70±5°C due to other abnormal problems, the temperature switch will act to perform temperature protection.
4. 32700 lithium iron phosphate battery/32700/6000mAh/3.2V LiFePo4 cell.
5. Field effect tube (MOSFET): MOSFET, which acts as a switch in the protection circuit, will always keep the voltage at both ends of the load from increasing or decreasing, ensuring voltage stability.
