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Battery Health 101

Battery health,
in plain language.

A non-technical guide to the concepts behind EVCare™ — for fleet directors, board members, and finance teams who need to make decisions without a battery-science degree.

Core Concepts

The ideas that matter most.

State of Health vs State of Charge

SoC is how full the battery is right now. SoH is how much capacity it has permanently lost over its life. Confusing the two leads agencies to retire healthy batteries early.

Degradation

Batteries lose capacity gradually through chemical and mechanical wear. The rate depends on how they’re charged, used, and kept — and it’s mostly invisible without the right data.

Thermal runaway

A dangerous chain reaction where a cell overheats uncontrollably. The value is in detecting the electrochemical precursors hours before conventional fault codes fire.

C-rate

How fast a battery is charged or discharged relative to its capacity. Sustained high C-rates accelerate wear.

Depth of discharge

How deeply a battery is drained each cycle. Shallower cycles generally mean longer life — a lever agencies can actually manage.

Cycle life

The number of charge/discharge cycles before capacity falls below a usable threshold. Real-world cycle life depends heavily on operating conditions.

The EVCare™ Glossary

What each module name means.

CareStar™

The cell-level sensing layer — voltage, temperature, impedance, and capacity at the source.

BattHealthScore™

A single composite health index per vehicle and pack, replacing subjective assessment.

FitStar™

Fleet fitness scoring — which buses are ready to run which routes today.

AMS™

Adaptive Maintenance Solutions — diagnoses issues and prescribes maintenance actions.

LPM™

Lifecycle Predictive Analytics — forecasts battery lifespan and replacement timing.

ESC™

End-of-Service Certification — certifies battery condition for resale or second life.

WMS™

Warranty Management Support — builds the evidence record for warranty claims.

TVAL™

Battery Value Estimator — data-backed valuation at any point in life.

SPECRX™

Specification Manager — compares OEM specs against real-world performance.

FleetAccess RX™

The fleet-wide command view — every battery, KPI, and alert in one place.

See the concepts in action.

Watch the ideas above play out across a simulated fleet, or explore the interactive MVP.

Open the SiL Simulator →Explore the Platform
EVCare™ · MVP Stage

EVCare™ is at MVP stage today, and we’re transparent about it: the current platform delivers the core battery-health intelligence, while additional modules and capabilities will be introduced and integrated across 2027 and 2028 as we scale.