Battery Management System
The battery industry is leading the market at a point where not only electric vehicles and energy storage systems but also eco-friendly public policies are combined. In order to diagnose the state of a battery, such as voltage, current, temperature, etc., are received from a cell through cell monitoring, and using this, the remaining capacity and the aging state of the battery are estimated. Our main interest is to implement the properties of BMS with high stability and to design chips and systems that can realize all the functions, including power-related control. BMS is applicable everywhere power needs to be managed, but the most concentrated parts of it are electric vehicles and energy storage systems, and BMS can also be applied to IoT devices. BMS is a system that includes some kinds of PMIC (e.g. power converter, low dropout, switching capacitor), but is a larger system that includes the below functions.
Optimized Multi-Storage Control
Since numerous storage devices are managed simultaneously, balancing between modules is essential, and a combination of data transmission and cell status prediction becomes important. Data is transmitted and received in a very hash environment, and it is necessary to design a strategy to balance the state of a cell in consideration of both charging and discharging states.
State Monitoring System
In communication systems, transceivers are in charge of transmitting and receiving signals. As data signal is transmitted through medium, such as wireline, optical fibers, and air (wireless), it suffers from distortion caused by various reasons, resulting erroneous data at receiver. For high-speed communication, the impairment is severer and compensation is critical for acceptable signal integrity. For accurate transfer of data, various algorithms and techniques for compensating distortion need to be integrated in transceiver ICs.