SOC estimation

Enhancing Lithium-Ion Battery Management with Advanced Kalman Filter Tuning

Advanced Kalman Filter Tuning comparison of errors

Enhancing Lithium-Ion Battery Management with Advanced Kalman Filter Tuning summarises the work conducted by Jasper Knox, Mark Blyth and Alastair Hales (all University of Bristol). Lithium-ion batteries are integral to modern electric vehicle development, requiring advanced battery management systems (BMS) for effective battery pack operation. A critical task for these systems is accurately estimating state … Read more

Impact of SOC Estimation Error

SoC accuracy

An initial high level look at the impact SOC estimation errors. State of Charge (SOC) State of Charge, abbreviated as SOC and defined as the amount of charge in the cell as a percentage compared to the nominal capacity of the cell in Ah. Errors in SOC accuracy can impact the operation of the battery … Read more

Measurement of Open Circuit Voltage

open circuit voltage versus SoC for different chemistry

The measurement of Open Circuit Voltage can be time consuming as it needs to be established versus the State of Charge (SoC) of the cell. Doing this in fine steps from 0% to 100%, with the measurement being made “at rest”, means we have to charge/discharge and then let it rest before making the voltage measurement. The … Read more