SLUUCW4 November 2023 BQ27Z558
Gauge State of Charge (SOC) reporting often loses accuracy in low temperatures due to higher cell impedances. Impedance Track gauges allow SOC reporting to be improved significantly for gauges that experience low temperatures by using the GPCRB Tool. This simple test requires a similar process to the Chemical ID process, but adds a much greater degree of accuracy for low temperature gauging.
The test setup required to use the GPCRB Tool is very similar to the setup shown in Figure 2-3. The only difference is that the EVM thermistor must be connected to the surface of the battery and a temperature-controlled chamber, such as Arbin or Maccor, is required to create a low-temperature environment where the gauge can monitor the battery’s IVT characteristics.
For more information about this process, see the GPCRB page on ti.com.