Technology · Solution

Real-time Monitoring

Real-time monitoring results
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Function

Real-time degradation monitoring and diagnostics based on
BMS data such as battery voltage, current, and temperature

Real-time degradation monitoring and diagnostics based on <br>BMS data such as battery voltage, current, and temperature
Key features

SPH (Stress Index Per Hour) Hourly stress index tracking to assess short-term degradation

SPD (Stress Index Per Day) Daily stress index tracking to assess long-term degradation trends

Input Parameter for Stress Index Analysis factors include charge/discharge current, SOC range, temperature, and usage time

Expected benefits

More efficient asset management enabled by real-time degradation (stress index) monitoring

Enhanced accuracy of SOC and SOH through algorithms that integrate stress indices

Results

Reliable and trustworthy monitoring results that support data-driven decision-making

Real-time monitoring results
Real-time monitoring results
Demonstration results
  • Pilot application on a 24MWh utility-scale FR ESS (operation started in 2017), securing long-term verification data
  • Improved accuracy of SOH calculations by additionally factoring in Stress Index (SPD), SOC swing range, and temperature
Real-time monitoring results confirmed improvements in SOC and SOH accuracy
SOC SOH
Demonstration results
  • Our solution was applied to the 24MWh utility-scale FR ESS (Nov. 2023) and compared with prior operational data
  • During rated charge/discharge cycles, SOC data deviation reduced (Δ5–6%) and SOH accuracy improved
    SOH calculation error significantly reduced compared to measured values (Δ7.5% → Δ1%)