Parthian Energy Send us your cells
Current-density imaging · EMIS

You're scrapping good cells to be safe.
We show you which are actually bad.

Every fast test on the line waits for damage to surface as voltage, gas, or geometry. EMIS sees the current density itself — where recall-class defects appear first.

Scroll into the cell

A healthy cell carries its current symmetrically.

Two tabs, two balanced lobes, a quiet field. This is what "good" looks like from the inside — something no voltage reading can show you.

Twelve fast-charge cycles later

Now one of these cells is quietly failing.

Lithium plating has begun inside. The cell still passes every voltage and temperature check on the line — the damage is real, and completely invisible to every fast test.

Interactive · hunt the defect

Can you find it?
Neither could the factory.

Sweep the lens across the cell. Outside it, everything looks healthy — the way it looks to every other instrument. Only EMIS resolves what's hiding underneath.

◅  move your cursordrag your finger across the field

The standard is what compounds

Anyone can build an instrument.
We're building the reference.

Every cell EMIS images sharpens a model trained on real commercial-cell signatures — the layer the industry calibrates against. The instrument is the wedge; the data is the moat.

The short version, for people who need the long version.

EMIS — Electrochemical Magnetic Induction Spectroscopy — drives a small AC current through a cell and reads the magnetic field just above its surface. From that field it reconstructs the current density inside, where latent defects live. Everything below is here when you want it; nothing above needed it.

What it is

EMIS08S01

An 8-channel current-density mapper plus EIS. Non-contact, chemistry- and format-agnostic, 200 mAh to 100 Ah. Output: a 2D field map resolving to a machine-readable defect read.

From US$ 9,975 / 6-mo rental

Why it's different

A third signal

Self-discharge, ultrasound, and X-ray each wait for damage to become voltage, gas, or geometry. EMIS images the current density directly — earlier, and including the recall-class faults the others miss.

Why it holds

The record

Invented at Caltech in 2013, exclusively licensed, issued-and-pending across US/EU/JP/KR/CN. Lithium-plating detection independently validated with Idaho National Laboratory.

How EMIS compares to every other inline method +
Self-dischargeUltrasoundX-ray / CTEMIS
SignalSelf-dischargeAcousticGeometryCurrent density
Images functionBulk onlyNoNoYes
Catches platingNoLateNoYes — validated
Before electrolyteNoNoYesYes
No relaxationNoNoYesYes
What it costs to scrap good cells — and what EMIS recovers +

Large-cell scrap runs about $10/kWh — double small-cell cost, because manufacturers raise thresholds to cover what they can't measure. EMIS targets $5/kWh by resolving the uncertainty, restoring small-cell economics. On a 5 GWh line that's roughly $25M/year in recoverable scrap value, against a software fee comparable to existing QC.

From lab to line — where you start +

Research & national labs (today). The EMIS08S01 delivers 2D current-density maps to trained scientists; paid joint-validation builds the dataset.

Pilot QC (next). An auxiliary screening station beside ACIR, proving scrap reduction on a real line.

Inline at scale (the prize). EMIS riding the existing ACIR station — same electronics, ~10s, no added line time — as cell capacity grows toward ~4,700 GWh by 2030.

Who's behind it +

Farshid Roumi, PhD — Founder/CEO. Caltech PhD, inventor on 23+ patents, recognized by the U.S. government for Extraordinary Ability in Science.

Michelle Mahshid Roumi, PhD — Co-founder/VP/PI. ML and signal processing; her neutrino-detector hardware has run autonomously in Antarctica since 2013.

Advisors include Rachid Yazami (co-inventor of the graphite anode; Draper Prize laureate) and Mehdi Hatamian (NAE member; former Broadcom SVP).

Or see the full technical case — measured INL data, the method, specifications, and the patent record.

Full due-diligence site →