The smart battery data accuracy measurements are intended to test the accuracy of the data that a
smart battery reports. This information must be accurate if a smart battery powered system is to
obtain maximum battery run time and maximum battery life. These data accuracy
measurements consist of six basic tests (some with multiple parts) that reflect how a battery is
used in a typical computer laptop environment with a compliant SBS Smart Battery design. The
tests are best done in numerical order, however each test procedure is self-contained and may be
performed independently.
The equipment necessary to complete the tests are:
1) A test controller which orchestrates the tests according to the test procedures; initiates and
records the results of measurements of the battery voltage and current; measures, controls
and records the test environment temperature; and initiates, responds and records
communication with the battery’s SMBus interface and Safety Signal.
2) A variable/programmable load that is capable of producing constant current, constant power,
pulsed current and pulse power loads. The pulsed loading modes require pulse width
resolution of better than 25ms.
3) A programmable charge source capable of constant current, constant power, pulsed current
and pulsed power. The pulsed charging modes require pulse width resolution of 25ms.
4) Voltage, current, resistance and temperature measurement instrumentation capable of
sampling each value at a 5ms rate by command of the test controller.
5) A temperature controlled test environment capable of providing 0°C to 60°C temperatures
on command of the test controller, with +/-5°C accuracy and stability. Relative humidity
can be reported if measured.
6) An SMBus host port capable of sending and receiving all SMBus protocols required in the
Smart Battery Data Specification v1.1. The SMBus port should be fully compliant with the
SMBus Specification v1.1.
