Flaw detector standby power design scheme
The flaw detector is a portable industrial non-destructive flaw detection instrument, which can quickly, conveniently, non-destructively and accurately detect, locate, evaluate and diagnose various defects (welds, cracks, inclusions, folds, pores, sand holes, etc.) inside the workpiece , can be used both in the laboratory and on the engineering site. The instrument can be widely used in manufacturing, iron and steel metallurgy, metal processing, chemical industry and other fields that require defect detection and quality control. Life assessment, which is a must for the non-destructive testing industry. Portable flaw detectors have become an important tool for on-site testing in modern society, and providing efficient, portable, light, and sufficient backup power solutions for portable flaw detectors is an important guarantee for testers to carry out long-term on-site work. Because of its own unique advantages, 18650 lithium battery pack has become the first choice for the backup power solution of such high-tech testing instruments.
1. Design requirements for spare lithium battery of flaw detector
Due to the high voltage and long working hours of the flaw detector, the quality of the equipment itself and the continuous stability of the power supply are particularly critical, which requires that the power supply must be realized by a multi-series parallel combination of large-capacity single lithium batteries; in the flaw detector During the working process, a large amount of valuable data needs to be saved continuously, so it is necessary to provide an accurate battery power display and an alarm system to prompt the user to save the data in time to improve the effectiveness of the work. The backup lithium battery solution of this flaw detector adopts an intelligent chip, and the host continuously reads the power and related important data in the intelligent chip through I2C communication, and monitors the battery constantly to prompt the user to perform relevant operations in a reasonable and timely manner. The Sanyo batteries integrated in our solution have the advantages of high energy ratio, light weight, small size, high cycle life, high safety, high voltage, and good consistency. The lithium battery pack is designed to output an overcurrent protection value of 12A, and the continuous working current 7A, charging capacity 5000mAh, fully meet the power demand of the instrument. The specific design requirements parameters are as follows:
1) Lithium battery pack model design requirements: 18650-3S2P/5000mAh/11.1V.
2) Circuit part design requirements:
1. Single cell overcharge protection voltage: 4.35±0.25V
2. Single cell overcharge recovery voltage: 4.15±0.50V
3. Single-cell over-discharge protection voltage: 2.40±0.08V
4. Single-cell over-discharge recovery voltage: 3.00±0.10V
5. Combined battery overcurrent protection value (10ms): 30~35A
6. Combined battery over-temperature protection value (recoverable): 70±5°C
7. The finished battery also has short-circuit and reverse charge protection.
3) Design requirements for battery cycle life: 300~500 times (national standard charge and discharge standard)
4) Design requirements for battery dimensions: refer to the battery case
2. Design scheme of spare lithium battery for flaw detector
1) Intelligent power gauge protection board (PCM): adopts SBS intelligent battery management system, uses advanced power calculation principles to accurately calculate the battery power at all times, and reports the battery power information to the host through SMBUS at all times, and at the same time reports to the rechargeable smart battery Due to the chemical characteristics of the lithium battery itself, it is necessary to provide protection functions such as overcharge, overdischarge, short circuit, overcurrent and overtemperature to avoid dangers such as combustion and explosion.
2) 18650 Li-ion battery/18650/2500mAh/3.7V Li-ion cell (SANYO).
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 acts to perform temperature protection.
4) Field effect tube (MOSFET): MOSFET tube, which acts as a switch in the protection circuit, will always keep the voltage at both ends of the load from rising or falling, ensuring voltage stability.
5) Battery pack packaging (housing)
-
Introduction: In recent years, the global demand for clean and sustainable energy has been on the rise. As we move towards a greener future, the need for efficient energy storage solutions has become increasingly important. One such solution that has gained significant attention is the use of lithium batteries in energy storage power stations. This article aims to explore the...En savoir plus -
To charge a Lithium Iron Phosphate (LiFePO4) battery, follow these general steps: Use a charger specifically designed for LiFePO4 batteries, as this type of battery has a different charging profile than other lithium-ion batteries. Connect the charger to the battery, making sure the polarity is correct. Set the charger to the appropriate charging voltage and current for your specific battery....En savoir plus -
Lithium-ion batteries have revolutionized the way we power our devices. From smartphones and laptops to electric vehicles and renewable energy storage systems, lithium-ion batteries have become an essential part of our modern lives. In recent years, there have been significant advancements in lithium-ion battery technology, leading to improvements in energy density, safety, and longevity. One of the major advancements...En savoir plus -
Lithium iron phosphate (LiFePO4) batteries are becoming increasingly popular in the automotive industry due to their high energy density, long cycle life, and safety features. These batteries are commonly used in electric vehicles (EVs) and hybrid electric vehicles (HEVs) due to their ability to provide high power output and fast charging times. One of the main advantages of LiFePO4 batteries...En savoir plus -
A 12V LiFePO4 battery is a reliable power source for your devices that offers numerous benefits over other types of batteries. LiFePO4 batteries are a type of lithium-ion battery that uses a lithium iron phosphate cathode material. This technology provides a number of advantages, including higher energy density, lighter weight, longer cycle life, and improved safety compared to other types...En savoir plus -
In recent years, there has been a significant shift in the warehouse industry towards the use of electric forklifts with lithium batteries. These innovative machines have revolutionized the way warehouses operate, offering numerous advantages over traditional forklifts. With their improved efficiency, reduced maintenance costs, and environmental benefits, electric forklifts with lithium batteries are becoming the preferred choice for warehouse managers...En savoir plus -
Are you tired of dealing with weak and unreliable starter batteries in your vehicle? Look no further than a lithium starter battery to provide the power and reliability you need to get your engine revving. Lithium starter batteries are a popular choice for many vehicle enthusiasts due to their lightweight and compact design, as well as their ability to...En savoir plus