Technical Manual BCIS-04C: Recommended Practice for Start-Stop

Battery Technical Manual Section BCIS-04A (SAE J3012): Recommended Practice for Start-Stop

Revised 12/2020

BCIS-04C (SAE J3012) is a recommended practice for testing start-stop (micro-hybrid) batteries. It covers the testing of lead-acid starting batteries intended to operate under the enhanced rigors demanded by start-stop vehicles that shut off their engines to save fuel and reduce emissions during frequent traffic stops. The document describes measurements of battery capacity, cranking, charge acceptance and life. Tests include specific SAE J537 capacity and cranking tests already in practice for standard starting batteries plus new tests that specifically target start-stop demands. These new tests include procedures for characterizing pulse cranking characteristics in a partially discharged condition, charge acceptance with and without extended stand and loss of performance on extended stand.

Start-stop vehicles have been in existence for a number of years and there have been numerous battery testing documents developed by other testing agencies that are commonly used in the industry. BCIS-04C (SAE J3012) has therefore included selective cited reference tests specifically for the measurements of cycle life and charge acceptance.

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Pete Stanislawczyk, East Penn

Lead batteries will be the primary stored power source for these systems. Based upon our insights, we believe lead AGM – or absorbed glass mat batteries – will be the battery of choice for the next 20-plus years.

Pete Stanislawczyk, Senior Vice President Transportation Division, East Penn Manufacturing Company