As the core energy component of electric vehicles and many portable electronic devices, lithium batteries have become the leader of modern energy solutions due to their high energy density, lightweight portability and excellent charging performance. However, the "sensitive" nature of lithium batteries also places higher safety and performance requirements on their use and maintenance. To meet these demands, battery management systems (Battery Management Systems, BMS) have become a key technology to ensure the safe, efficient and long-lasting operation of lithium batteries. Next, Ancol will give you a brief introduction.
1. Security Needs Importance
Lithium battery safety risks mainly from overcharge, over discharge and overheating and so on. When overcharged, lithium metal may be produced inside the battery, which in turn causes thermal runaway, causing the battery to rupture or even explode. Over-discharge may cause irreversible damage to the internal structure of the battery, reducing the capacity and life of the battery. In addition, when lithium batteries work in high temperature environments, the chemical reaction speed is accelerated, further increasing the risk of thermal runaway.
By monitoring key parameters such as battery voltage, current and temperature in real time, BMS can accurately control the charging and discharging process, effectively prevent these safety risks, and ensure the safe use of lithium batteries.
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2. Functional Demand Diversity
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real-time monitoring of SOC
SOC (battery state of charge) is an important indicator to reflect the amount of remaining battery power, which is of great significance for estimating battery mileage and managing battery charge and discharge strategies. BMS calculates and updates SOC values in real time through high-precision algorithms to provide users with accurate battery usage information to meet application performance requirements.
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balanced management
there is an inevitable inconsistency between the single cells in the lithium battery pack. This inconsistency will increase with the increase of battery life, and ultimately affect the performance and life of the entire battery pack. BMS through the implementation of dynamic equalization strategy, the battery pack in the single cell timely adjustment, to maintain the voltage consistency between the monomer, so as to improve the overall performance of the battery pack and extend the service life.
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temperature Management
the optimal operating temperature range of lithium-ion batteries is 25°C to 40°C. The influence of temperature on lithium battery is multifaceted, including the accuracy of SOC estimation, the ability of battery charge and discharge, internal resistance and cycle life. Through the temperature management function, BMS monitors the temperature of the battery working environment in real time, and takes necessary heat dissipation or heating measures to keep the battery within the optimal working temperature range, improve the working performance of the battery, and extend the service life of the battery.
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