ISO 9001:2015 Certified OEM Engineering

Request a Custom Battery Pack Quote

Partner with our North American engineering specialists to design, validate, and manufacture high-reliability lithium power solutions for your critical applications.

Custom Lithium Battery Design & Manufacturing Consultation

Excell Battery Co. brings over 40 years of specialized engineering experience to global B2B procurement managers and OEM design engineers. Supported by Ultralife Corporation, our multidisciplinary technical team manages every phase of custom battery development — from initial chemistry feasibility and thermal modeling to BMS firmware design, UN 38.3 certification, and volume production.

Full-Lifecycle OEM Battery Engineering Capabilities

Tier-1 Cell Integration Direct partnerships with audited cell suppliers for Li-ion, LiFePO4, Li-SoCl2, and Li-MnO2 chemistries.
Smart BMS & Firmware Custom protection circuits, SBS compliance, SMBus/CANbus communication, and intelligent state-of-charge tracking.
Extreme Conditions High-temperature downhole packs (up to +170°C), shock & vibration resistance, and ATEX/HAZLOC enclosure sealing.
Global Safety Certifications Complete regulatory testing including UN 38.3 transport safety, IEC 62133, UL 2054, and ISO 9001 auditing.

Technical Information Required for Project Review

To accelerate your custom engineering estimate, please prepare the following operating specifications for consultation:

  • Nominal operating voltage (V), capacity requirement (Ah/Wh), and peak/continuous current drain rate
  • Mechanical enclosure dimensions, connector types, IP sealing grade, and thermal dissipation constraints
  • Operating temperature spectrum (e.g., arctic cold -40°C to high-temperature oilfield +170°C)
  • Target safety & regulatory standards (UN 38.3 transport, ATEX intrinsic safety, UL/IEC standards)
  • Estimated annual production volumes (EAPV) and prototype delivery schedule requirements

Connect Directly with an OEM Battery Engineer

Our technical sales engineers review incoming technical specifications and respond promptly with preliminary project analysis.

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Excell Engineering Capabilities

Technical Insights & Guidelines

Design Case Study

Compact Li-Ion Battery Architecture for Outdoor Surveillance Systems

Compliance Standard

Ensuring Safe Transit: Understanding UN 38.3 Lithium Battery Testing

Oilfield Engineering

Optimizing MWD & LWD Battery Pack Efficiency in Downhole Drilling

OEM Cell Selection

Critical Chemistry & Provider Considerations for System Designers

ISO 9001:2015 Quality Commitment

An Exceptional Record of Quality and Reliability for 40+ Years

ISO 9001 certified quality management certification
Intertek certified battery safety testing mark
SWEDAC accreditation quality standard mark