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Diagnostics Methodology

Physics-Informed Anomaly Detection for Critical Infrastructure

A practical look at how physics-informed diagnostics turn raw telemetry into explainable signals for BESS and other critical infrastructure teams.

February 27, 2026
12 min read
Oxaide Team
Physics-Informed Anomaly Detection for Critical Infrastructure

Physics-Informed Anomaly Detection vs. The 'Black Box' AI Trap

In the world of critical energy infrastructure, "close enough" is a catastrophic failure. Traditional AI and Machine Learning models—often trained on generic statistical variances—frequently miss the subtle, transient signatures of physical degradation until it's too late.

At Oxaide, we believe that auditing industrial assets requires more than statistical guessing; it requires Deterministic Physics.

The Problem with Statistical "Black Boxes"

Standard machine learning models (and even Neural Networks) treat telemetry (voltage, temperature, current) as abstract data points. They look for statistical outliers. But in a Battery Energy Storage System (BESS), an outlier isn't always an anomaly, and a critical anomaly isn't always an outlier.

A sub-second voltage curve shift might be statistically insignificant across a 24-hour window, but when cross-referenced against electrochemistry via Incremental Capacity Analysis (ICA - dQ/dV), it becomes a definitive signal of cell degradation or lithium plating.

A Neural Network will tell you: "Anomaly Detected." It cannot tell you: "Loss of Lithium Inventory at SEI growth rate X, leading to Knee Point in 14 months."

The physics does.

The Oxaide Horizon Methodology: Physics-First, AI-Second

We don't sell another Black Box that guesses when a battery might fail. We use Calculus.

Oxaide Horizon relies on a 5-Pillar Architecture, with the foundational Pillar 1 built entirely on deterministic equations. We derive chemistry first, then Machine Learning builds on top.

1. Deterministic Chemistry Extraction (ICA)

Most enterprise analytics aggregate logs into 1-minute or 5-minute averages, feeding them blindly into an algorithm. Oxaide Horizon uses a proprietary signal separating kernel to reconstruct clean Incremental Capacity Curves (dQ/dV) from noisy field environments. We calculate the derivative to see exactly what the chemistry is doing.

2. Physical Ground Truth Mapping

We map telemetry against the asset's established phase transitions (validated against models from Bloom and Dubarry). If the voltage curve plateaus improperly, our deterministic engine catches the fundamental electrochemical change, firing an alert weeks before temperature sensors detect a spike.

3. Machine Learning as a Scaling Layer (Phase 2)

We do not use Neural Networks to identify mechanisms. ML enters in Phase 2 in specific, mathematically constrained roles: Extended Kalman Filters (EKF) for ±2% State of Charge (SOC) estimation, and adaptive modeling for Knee Point prediction. Our physics engine generates the ground-truth labels that supervise the ML layer. Physics trains the model. The model scales the physics.

Case Study: BESS Forensic Scrubbing

Recently, Oxaide Verify was deployed to audit forensic logs from a utility-scale BESS project.

  • The Challenge: The client's existing Black-Box AI system was flagging "ghost faults" without identifying root causes.
  • The Finding: Using offline Incremental Capacity Analysis, our forensic engine identified a shifting dQ/dV shoulder peak in Block 7.
  • The Diagnosis: Active Lithium Plating confirmed. The fault was completely missed by the standard SCADA and the vendor AI, but mathematically definitive under deterministic analysis.

The Verdict: Audit-Grade Rigor

For asset owners and engineering teams, "AI" is a liability if it cannot be audited. The Oxaide Phase 1 pilot generates reproducible methodology. Your engineering team can verify every step against the academic literature. That is audit-grade transparency.

We don't guess. We derive.


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