How lithium battery plays an important role in medical electronic products
Battery monitoring systems are a basic enabler of different markets. Batteries play an important role in various applications, including greater achievements in the field of electric vehicles, and storage of renewable energy for smart grids. The same and similar battery technologies are used in medical devices, which can improve the safety of the operation and freely move the devices in the hospital. All these applications use battery power that requires precise and efficient semiconductors for monitoring, balancing, protection, and communication. ________________________________________________________________________________ Batteries used in medical applications need to meet very high reliability, efficiency, and safety standards in all applications where these batteries are commonly used. These applications include: patient portable systems such as chest compression systems, hospital emergency room equipment, powered medical vehicles and Beds, portable ultrasound equipment, remote monitoring, and new product energy storage systems (ESS) on the market. ________________________________________________________________________________ The energy storage system is neither directly connected to the patient nor operated by a doctor. They are the upgrade of uninterruptible power supply (UPS). UPS has historically been used as a backup power source for the most critical applications and medical demand, such as emergency room equipment and IT network critical infrastructure. The hospital's energy storage system covers more and more functions, powered by new lithium batteries. ________________________________________________________________________________ They are fully integrated with the hospital grid, which brings the following advantages: ________________________________________________________________________________ - Complete backup power supply for the entire facility, not just a small part of critical facilities, and power outage protection to prevent poor power / voltage quality of the power grid and reduce the use of emergency diesel generators. With the help of gigawatt-hour (MWh) scale ESS, hospitals can even perform surgery in the event of a long power outage, and can participate in grid stabilization. ________________________________________________________________________________ - The economic benefits of electricity bills. With the help of ESS, hospitals can directly control the power usage configuration and reduce the peak demand for high power, thereby reducing utility bills. ________________________________________________________________________________ Lithium-based chemistry, such as LiPo battery, is now an advanced technology for batteries used in a variety of markets, including the automotive market, industrial market, and healthcare market. Different types of lithium batteries have different advantages, which can better meet the power requirements of various applications and product designs. For example, LiCoO2 (lithium cobalt oxide) has a very high specific energy and is very suitable for portable products; LiMn2O4 (lithium manganese oxide) has a very low internal resistance, so it charges quickly and the current discharge is large, which means it is peak-shaving energy storage Ideal for applications. LiFePO4 (Lithium Iron Phosphate) is more able to withstand full charging and can be kept at high voltage for a long time. This makes it the best choice for large energy storage systems that need to work during a power outage. The disadvantage is that the self-discharge rate is higher, but this is not important in the above storage implementation. ________________________________________________________________________________ Different application requirements require various battery types, low temperature performance and explosion proof performance. For example, automotive applications require high reliability and good charge and discharge speeds, while medical health applications require high peak current sustainability to improve efficiency and extend life. However, what all these solutions have in common is that various lithium chemistries have very flat discharge curves in the nominal voltage range. ________________________________________________________________________________ For new lithium-based batteries, the accuracy required to make this measurement is several orders of magnitude higher because the voltage drop is much smaller in a given time frame.