Continuous Battery Health Diagnosis by On-Line Internal Resistance Measuring

Internal battery temperature estimation using series battery resistance measurements during cold temperatures

A technique has been developed to estimate the internal battery temperature (Tbat) of secondary batteries by measuring the series battery resistance R ) at cold ambient temperatures. Tests were performed on both lead-acid and nickel metal hydride batteries at different cold temperatures to B btain useful plots of RB versus Tbat. RB was measured by using a pulse discharge circuit to apply a shor...

PHEV battery ageing study using voltage recovery and internal resistance from On-board data

It is well known that batteries do not perform equally the first day of use than some years later. Their properties are in constant degradation, their capacity fades and the maximum power reduces. Batteries ageing has been widely studied under laboratory controlled conditions for different types of cells. In real life, however, every person has its own driving profile, which is almost unique an...

Internal Regret in On - line

Battery Internal Temperature Estimation for LiFePO4 Battery Based on Impedance Phase Shift under Operating Conditions

An impedance-based temperature estimation method is investigated considering the electrochemical non-equilibrium with short-term relaxation time for facilitating the vehicular application. Generally, sufficient relaxation time is required for battery electrochemical equilibrium before the impedance measurement. A detailed experiment is performed to investigate the regularity of the battery impe...

Automatic Measurement for Internal Resistance of Battery in Uninterruptible Power Source

This paper considers the approach to the measurement of internal resistance of the battery in the uninterruptible power sources (UPSs [1]). Advantages of the approach are the measurements in power supplies without switching-off the battery, simplicity in realization of algorithm. The basic expressions of the theory used in the method about internal resistance of the storage battery are consider...