SLUUB65B May 2015 – December 2022
To handle pulse load conditions, the gauge uses additional parameters. Delta Voltage is the maximum difference of Voltage() during short load spikes and normal load, so the Impedance Track algorithm can calculate remaining capacity for pulse loads. The Delta Voltage value is automatically updated by the gauge during operation as voltage spikes are detected. It can be initialized to a higher value if large spikes are typical for the system. Allowable values are limited by Max DeltaV and Min DeltaV.
Max DeltaV is the maximum Delta Voltage that is saved during discharge and Min DeltaV is the minimum Delta Voltage that is saved during discharge.
During the IT simulations, the target voltage of the empty battery is (Terminate Voltage + Delta Voltage). This feature allows Terminate Voltage to be set at the minimum operating voltage of the system with assurance that the 0% point will be reached at a sufficiently high voltage to prevent voltage spikes from crashing the system, while still extracting maximum run time from the battery when spikes are small.
The DeltaV Max Delta variable provides a limit on how far Delta Voltage grows or shrinks on one grid update (in mV).
Subclass ID | Subclass | Offset | Name | Data Type | Value | Unit | ||
---|---|---|---|---|---|---|---|---|
Min | Max | Default | ||||||
80 | IT Cfg | 84 | Max DeltaV | I2 | 0 | 32767 | 200 | mV |
86 | Min DeltaV | I2 | 0 | 32767 | 0 | mV | ||
98 | DeltaV Max Delta | U2 | 0 | 65535 | 10 | mV | ||
82 | State | 9 | Delta Voltage | I2 | 0 | 32767 | 2 | mV |