SLUUC54C February 2020 – March 2024 BQ27Z558 , BQ27Z561 , BQ27Z561-R2
The BQ27Z561-R2 implements a QMax and Fast QMax boundary check prior to saving the value to data flash. This improves the robustness of the QMax update in case of potential QMax corruption during the update process.
The verifications are as follows:
| Class | Subclass | Name | Type | Min | Max | Default | Unit | Description |
|---|---|---|---|---|---|---|---|---|
| Gas Gauging | IT Cfg | QMax Delta | U1 | 3 | 100 | 5 | % | Maximum allowed QMax change from its previous value. The QMax change will be capped by this setting if the delta from the previous QMax is larger than QMax Delta. QMax Delta is a percentage of Design Capacity mAh. |
| Gas Gauging | IT Cfg | Qmax Upper Bound | U1 | 100 | 255 | 130 | % | Maximum QMax value over the lifetime of the pack. If the updated QMax value is larger than this setting, the updated QMax will be capped to Qmax Upper Bound. Qmax Upper Bound is a percentage of Design Capacity mAh. |