The relationship,that temperature and diaphragm material with electromotive force and internal resistance of cell system of atomic hydrogen sensor,was studied by the thermodynamic means,then a static mathematical model of sensor cell system was formulated.

It is demonstrated that the battery performance can be predicted by monitoring the battery internal resistance,with its measuring method given.

The components of internal resistance of VRLA battery and its measurement principle and method were analyzed.

The relationship of operating performance of AA size Ni MH cell with its internal resistance during charge,over charge,and high rate discharge are studied using thermocouple method and several other internal resistance measuring methods.

Studies on the relationship of conductance/internal resistance and performance of VRLA battery;

The traditional technique in measuring internal resistance of battery is studied,and a new way to measure the resistance with the lock-in amplifier is put forward,and has been proved by many tests,which can overcome the noise and interference,obtain stable measurement data and realize on-line examination.

This paper proposed a method of testing battery inner resistance in which virtual instrument technology was applied, introducing the virtual instrument system architecture of battery inner resistance test and the algorithm of software.

This system adopts four-wire measurement,proposing a method of testing high capacity storage battery inner resistance based on virtual instrument technology.