The Ra Table class has 15 values. The R_a RAM is initialized from ROM upon gauge reset. Each of these values represents a resistance value normalized at 25°C for the associated Qmax Cell 0-based SOC grid point as found by the following rules:

For Cell0 Ra M where:

• If 0 ≤ M ≤ 7: The data is the resistance normalized at 25° and scaled by Design Capacity for:
  SOC = 100% – (M × 11.1%)
• If 8 ≤ M ≤ 14: The data is the resistance normalized at 25° and scaled by Design Capacity for:
  SOC = 100% – [77.7% + (M – 7) × 3.3%]

This gives a profile of resistance throughout the entire SOC profile of the battery cells concentrating more on the values closer to 0%.

Normal Setting:

These resistance profiles are used by the gauge for the Impedance Track algorithm. The only reason this data is displayed and accessible is to give the user the ability to update the resistance data on golden image files. This resistance profile description is for information purposes only. It is not intended to give a detailed functional description for the gauge resistance algorithms. It is important to note that this data is in mΩ and is normalized to 25°C and scaled by Design Capacity. The following are useful observations to note with this data throughout the application development cycle:

• Watch for negative values in the Ra Table class. Negative numbers in profiles should never be anywhere in this class.
• Watch for smooth consistent transitions from one profile grid point value to the next throughout each profile. As the gauge does resistance profile updates, these values should be roughly consistent from one learned update to another without huge jumps in consecutive grid points.