The engineering behind every pack
Cell chemistry, BMS firmware, thermal management, and certification — engineered in-house. Five areas, scroll or jump.
Cell Chemistry Selection
We match the chemistry to your application: cycle life, energy density, safety, cost, and temperature range. Six families we design with, including LFP, NMC, NCA, LTO, and sodium-ion. Pick one to compare.
Lithium Iron Phosphate
The default for stationary storage and motive power. Inherently safe olivine-structure cathode that eliminates thermal runaway risk at the cell level, with field data on some deployments past 8,000 cycles. Lower energy density than nickel chemistries — unmatched safety margin and cost per cycle. Flat discharge curve simplifies SOC estimation.
Nickel Manganese Cobalt
Higher energy density for weight- and volume-sensitive designs. NMC811 maximizes energy; 622 and 532 trade energy for cycle life and thermal stability. Higher continuous C-rates than LFP, with tighter thermal management and more conservative BMS limits to match.
Nickel Cobalt Aluminum
The choice when weight is the non-negotiable constraint. Aluminum doping stabilizes the cathode at high nickel content, delivering maximum energy density with high power capability. Demands the most rigorous thermal and BMS design of the lithium chemistries — which is exactly what we do.
Lithium Titanate
The chemistry for duty cycles defined by power rather than energy. A titanate anode sits at 1.55 V against lithium instead of graphite's near-zero, which drops cell voltage to roughly 2.3 V and cuts energy density, but removes the lithium-plating limit that forces every other chemistry to stop charging in the cold. Continuous charge above 6C and manufacturer cycle ratings from 15,000 to 40,000. See LTO battery packs.
Sodium-Ion
Roughly 30% lower material cost, built on abundant and geographically diverse sodium. Production-ready since 2024 with multiple formats in volume. Energy density trails LFP, but cold-weather performance to -30°C and inherent safety make it a strong fit where cost controls the design.
Semi-Solid-State
Gel and polymer electrolytes dramatically cut electrolyte volume, raising both the safety margin and the energy ceiling. Production availability is still limited — we evaluate semi-solid-state per program, where energy density is the controlling variable and volumes align with supply.
Battery Management Systems
The intelligence layer that determines pack safety, performance, and lifespan. Hardware and firmware, engineered per application.
Cell Balancing
Active or passive — specified by the numbers, not preference. Active balancing recovers 5–10% of usable capacity and extends life on large, high-duty packs. Passive wins on cost where the thermal budget allows.
Protection Architecture
Independent hardware and software shutdown paths. Cell-level monitoring with two fault levels, redundant contactor control, pre-charge on HV packs. Thresholds set per program and locked via firmware signing.
Communication Protocols
CAN 2.0/FD with custom DBC files, J1939 for heavy-duty, RS485/232 for legacy industrial, Modbus for ESS and SCADA, Ethernet and MQTT for cloud telemetry. Every program ships with a documented interface spec.
Firmware, Written In-House
Charge profiles tuned to your duty cycle. SOC and SOH calibrated against real cell data, not datasheet curves. OTA updates on connected systems. Aligned with UL, IEC, and NFPA expectations before release.
Production & QA
ISO 9001, ISO 14001, and IATF 16949 operations. Five gates between raw material and your dock.
Incoming Material Inspection
Every lot verified on arrival — purity, particle size, moisture, spec compliance — before it enters the line. Failures are quarantined under a documented non-conformance procedure.
In-Process Statistical Process Control
Control charts on coating thickness, calendering density, weld pull strength, and fill volume flag drift before it becomes a defect. Cp/Cpk tracked per line, per shift, reviewed weekly.
Capacity Grading & Release
100% capacity grading, internal resistance on every cell, OCV after rest. Cells matched into tight groups so pack performance is consistent across the run. Full test reports ship with every order.
100% Lot Traceability
Every serial number traces back through every process step to the raw-material batch. A field issue twelve months later resolves to the exact date, line, operator, and material lot.
Monthly Data Review & CAPA
Production data, field returns, and warranty claims reviewed monthly by production and engineering together. Excursions trigger formal root cause analysis; corrective actions tracked to closure.
Safety & Certification
Test planning, lab coordination, and final documentation — all handled in-house, planned from day one rather than bolted on at the end.
Energy Storage Systems
The system-level standard for stationary ESS — what AHJs want to see before a permit. We run it as a program: test plan, lab scheduling, certification package.
SystemFire Propagation Testing
Characterizes how a thermal runaway event propagates. Results drive NFPA 855 spacing, venting, and suppression — so we test early, before the installation envelope is locked.
Test methodStationary & Motive Batteries
Product-level certification of the battery itself — electrical, mechanical, and environmental coverage for stationary, rail, and motive applications.
ProductIndustrial Lithium Batteries
The international safety standard for industrial lithium cells and batteries. Required outside North America, increasingly referenced alongside UL 1973 in U.S. projects.
InternationalTransport Safety
Eight test sequences every lithium battery must clear before it ships — altitude to forced discharge. A test summary accompanies every consignment.
TransportHazmat Compliance
Classification, UN-certified packaging, shipper's declarations, and emergency response docs. 49 CFR domestic, IATA air, IMDG sea — handled in-house.
ShippingLogistics & Import
We deliver to your dock with a landed-cost quote, not a logistics problem.
Class 9 Dangerous Goods
UN3480 and UN3481 shipping with test summaries, SDS, and signed DG declarations per consignment. Mode-specific protocols for sea, air, and ground.
UN-Certified Packaging
Drop, stack, and vibration tested, with non-conductive separation and orientation-locked configurations. Engineered per program under configuration control — not improvised at the dock.
HTS & Section 301 Tariffs
Correct classification, tariff exposure evaluated at quote time, duty drawback captured where it applies. Your landed-cost number has the tariff already in it — before you commit.
Pre-Clearance Documentation
Commercial invoice, packing list, UN 38.3 summary, SDS, and certificate of origin prepared before the shipment leaves origin. Licensed customs house relationships on both coasts.
Tell us what you need to build.
Send us your voltage, capacity, form factor, and duty cycle. We'll come back with a chemistry recommendation, a sample timeline, and a landed-cost number.