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SLUUBD3D–September 2015–Revised September 2018
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Copyright © 2015–2018, Texas Instruments Incorporated
Lifetime Data Collection
Chapter 10
SLUUBD3D–September 2015–Revised September 2018
Lifetime Data Collection
10.1 Description
The device has extensive capabilities for logging events over the life of the battery useful for analysis. The
Lifetime Data Collection is enabled by setting ManufacturingStatus[LF_EN] = 1. The data is collected in
RAM and only written to DF under the following conditions to avoid wear out of the data flash:
• Every 10 hours if RAM content is different from flash.
• In permanent fail, before data flash updates are disabled.
• Before scheduled shutdown
• Before low voltage shutdown
The lifetime data stops collecting under following conditions:
• After permanent fail
• Lifetime Data Collection is disabled by setting ManufacturingStatus[LF_EN] = 0.
Total firmware Runtime starts when lifetime data is enabled.
• Voltage
– Max/Min Cell Voltage Each Cell
– Max Delta Cell Voltage at any given time (that is, the max cell imbalance voltage)
• Current
– Max Charge/Discharge Current
– Max Average Discharge Current
– Max Average Discharge Power
• Safety Events that trigger the SafetyStatus() (The 12 most common are tracked.)
– Number of Safety Events
– Cycle Count at Last Safety Event(s)
• Charging Events
– Number of Valid Charge Terminations (That is, the number of times [VCT] is set.)
– Cycle Count at Last Charge Termination
• Gauging Events
– Cycle Count at Last FCC update
• Power Events
– Number of shutdowns
• Cell Balancing (This data is updated every two hours.)
– Cell Balancing Time each Cell
• Temperature
– Max/Min Cell Temp
– Delta Cell Temp (max delta cell temperature across the thermistors that are used to report cell
temperature)
• Time (This data is updated every 2 hours.)
– Total runtime
– Time spent different temperature ranges (See Charge Algorithm for ranges.)
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