Intelligent battery sensor

The intelligent battery sensor (IBS) evaluates the current quality of the battery. The IBS has its own control module. The IBS is part of the battery negative terminal. The IBS regularly measures (cyclically) the following values:

Battery voltage
Charge current
Discharge current
Temperature of the battery

Fig 1: Identifying Intelligent Battery Sensor And Related Components

Courtesy of BMW OF NORTH AMERICA, INC.

Index	Explanation
1	Intelligent battery sensor
2	Ground lead
3	Bit-serial data interface
4	Connection terminal 30