<img src=https://nenpower.com/wp-content/uploads/2025/04/image-13540.webp alt=’How can I ensure that my battery system’s voltage and current measurements are within specified ranges’ />
To maintain your battery system’s voltage and current measurements within specified ranges, consider the following technical and operational strategies:
Current Measurement Best Practices
- High-accuracy sensors: Use bidirectional current sensors with ranges covering both charging (e.g., 0–100 A) and discharging peaks (up to 2,000 A or higher for EVs).
- Coulomb counting: Track accumulated charge/discharge cycles using precise current measurements to estimate State of Charge (SoC) accurately.
- Bandwidth requirements: Ensure sensors have sufficient bandwidth to capture transient currents (e.g., kiloamp peaks lasting milliseconds).
Voltage Measurement Guidelines
- Voltage thresholds: For LiFePO4 batteries, adhere to:
- Charging voltage: 3.5–3.65V per cell (14.2–14.6V for 12V systems)
- Discharge cutoff: 2.5V per cell (10V for 12V systems).
- High-resolution DMMs: Use 6.5- to 8.5-digit multimeters for cell-level testing to detect microvolt-level deviations.
System-Level Validation
- Calibration: Regularly calibrate sensors against certified references to maintain accuracy.
- Protection circuits: Implement voltage/current limiters to prevent excursions beyond safe operating ranges (e.g., >3.65V/cell for LiFePO4).
- Diagnostics: Monitor for abrupt current spikes or voltage sag to detect faults like internal shorts or cell imbalance.
For LiFePO4 systems, prioritize balancing during charging to maintain uniform cell voltages within ±50mV deviation.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/how-can-i-ensure-that-my-battery-systems-voltage-and-current-measurements-are-within-specified-ranges/
