The battery monitoring system is the basic promotion factor in different markets. The battery plays an important role in various applications, including achieving greater achievements in the field of electric vehicles and storing renewable energy for smart grids. The same and similar battery technology is used for medical devices, which can improve the safety of surgery and freely move equipment in the hospital. All these applications use battery supply that requires accurate and efficient semiconductor to monitor, balance, protect and communicate. This article will introduce a first -class battery monitoring system (including battery balance and isolation communication network) how to use the advantages of new lithium battery chemistry. The use of innovative integrated circuits can improve reliability and prolong 30%of battery life, especially large -scale energy storage systems.

The batteries used for medical applications need to meet very high reliability, efficiency, and safety standards in all applications that are usually used in these batteries. These applications include: portable systems such as chest pressing systems, hospital emergency room equipment, power supply medical vehicles and Bed, portable ultrasound equipment, remote monitoring, and new product energy storage system (ESS) on the market.

The energy storage system is neither directly connected to the patient nor the doctor's operation. They are upgrades of uninterrupted power supply (UPS). UPS has always been used as a spare power supply for the most critical applications, such as emergency room equipment and IT network key infrastructure. The hospital's energy storage system covers more and more functions, which is powered by new lithium batteries. They are fully integrated with the hospital's power grid, thereby bringing the following advantages:

It is used for the entire facility instead of the complete backup power supply of a small number of key facilities, as well as power outage protection to prevent the power/voltage quality of the power grid from poor quality and reduce the use of emergency diesel generators. With the help of the Gigabi -Wat hours (MWH) ESS, the hospital can even perform surgery in the case of long -term power outage, and can participate in the stability of the power grid.

Economic benefits of electricity expenses. With the help of ESS, hospitals can directly control the configuration of power use and reduce the demand for high power peaks, thereby reducing water and electricity costs.

The roof of the hospital is usually very large, suitable for installing photovoltaic (PV) systems to generate electricity. PV systems are combined with ESS that can be stored and used by themselves, while providing economic benefits and reducing carbon emissions.

Lithium -based chemistry is now an advanced technology of battery used in various markets, including the automotive market, industrial market and medical and health market. Different types of lithium batteries have different advantages to better meet the power supply of various applications and product design. For example, LICOO2 (lithium cobaltate) has a very high ratio and is very suitable for portable products; Limn2O4 lithium manganese oxide) is very low, so it is fast charging and current discharge is also large, which means that it is a peak -regulating energy storage energy and storage energy storage energy storage The ideal choice of application. LIFEPO4 (lithium iron phosphate) can also withstand complete charging status and keep it under high voltage for a long time. This makes it a better choice for large energy storage systems that need to work during power outages. The disadvantage is that the self -discharge rate is high, but this is irrelevant in the above -mentioned storage implementation.

Different application requirements require various battery types. For example, automotive applications require high reliability and good charging and discharge speed, and medical and health applications require peak value current sustainability to improve efficiency and extend their life. However, the common point of all these solutions is that various lithium chemical composition has a very flat discharge curve within the nominal voltage range. In the standard battery, the voltage drop range is 500 MV to 1 V. In high -grade lithium batteries, such as iron phosphate (LIFEPO4) or lithium cobaltate (LICOO2), the discharge curve shows a voltage drop range from 50 mv to 200 MV's flat area.

The flatness of the voltage curve has a huge advantage in the power management chain connected to the IC of the battery voltage: the DC-DC converter can work in the maximum efficiency point within a smaller input voltage range. It is known from known VIN to a very close VOUT. The power chain of the system can be designed as an ideal occupation ratio with antihypertensive and boost converters, achieving 99%efficiency under all working conditions. In addition, the battery charger can perfectly match the charging voltage and determine the load size according to the stable working voltage to improve the accuracy of the final application of remote monitoring or electronic products in the patient's body. Extra power consumption needs to be charged more frequently.

The main disadvantages of a flat discharge curve are the charging state (SOC) and health status (SOH) rated value of the battery. SOCs must be calculated with very high accuracy to ensure the correct charging and discharge of the battery. Excessive charging can bring security problems and produce chemical degradation and short circuit, leading to fire and gas harm. Excessive discharge may damage the battery and shorten the battery life by more than 50%. SOH provides information about battery performance status to help prevent replacement of good batteries and monitor the state of bad batteries before problems. The main micro -controller analyzes SOC and SOH data in real time, modify the charging algorithm, and informs the battery's potential (for example, whether the battery is ready for large current depth discharge), and ensuring The battery in a bad state and the battery in a good state achieve a balance to increase the total battery life.

By using a steep discharge curve to make digital modeling a very old battery, it is easier to calculate the charging state of the battery. The method is to measure the voltage increase in a short time and know the absolute value of the battery voltage. For the new lithium -based battery, the accuracy required for this measurement is several magnitude level, because the pressure drop is much smaller within the given time range.

For SOH, the old battery discharge faster and more predictable: their voltage discharge curve becomes steeper and cannot reach the target charging voltage. New lithium batteries will maintain the same good behavior for a longer time, but will eventually reduce performance with more special behaviors, and quickly change their impedance and discharge curves when their life span is about to end or the battery is about to damage. When measuring temperature, you must be extra careful. It is best to integrate the SOC and SOH algorithm with this information on each battery to make them more accurate.

The accurate and reliable SOC and SOH calculations will help extend the battery life from 10 years to 20 years under the best case. Generally, the battery life can be increased by 30%, including the maintenance cost, which will be energy storage. The total cost of the system is reduced by more than 30%. Coupled with more accurate SOC information, you can avoid excessive charging or excessive discharge and cause rapid battery; maximize the possibility of short circuit, fire and other dangerous conditions; Make the battery charging as the best and most efficient way.