Meaning
Systematic reviews of the unconditioned electrical signals ensure that the information recorded by a battery management system is accurate. A raw voltage channel audit ensures that digitized values are true reflections of the cell potential.
Accuracy Check
Comparison between the internal system readings and a high precision external voltmeter forms the basis of the test. During a raw voltage channel audit, technicians apply a known steady state voltage to each input to verify linearity across the full operating range. This step confirms that the data acquisition system is not introducing a hidden bias.
The audit process also investigates whether the internal sampling rate is sufficient to capture transient voltage spikes that might indicate cell instability.
Hardware Calibration
Periodic adjustment of the sensing circuits prevents the accumulation of measurement errors over time. Performing a raw voltage channel audit reveals if specific channels are failing due to component aging or electromagnetic interference. Maintaining this precision is necessary for balancing the individual cells in a large pack.
Error Identification
Discrepancies found during the inspection point to faulty wiring or corrupted firmware algorithms. If a raw voltage channel audit fails, the test data from that period is marked as invalid and the equipment is removed from service for repair. This rigorous oversight protects the integrity of long term cycle life studies.
