ISO 9001 Certified · Engineering Lifecycle Excellence

Custom Battery Pack Design & Engineering Process

End-to-end custom battery pack development for OEM applications — combining cell selection, electrical BMS integration, safety compliance, and volume manufacturing.

Diversified Custom Battery Engineering & Manufacturing

Excell Battery provides a complete lifecycle approach to custom battery design. Backed by over 40 years of engineering experience and key partnerships with the world's leading cell chemistry manufacturers, we design, build, test, and recycle high-reliability battery systems tailored to your exact operational and environmental requirements.

System Application Analysis & Specification

Understanding Operating Requirements Before Engineering Begins

Selecting the right energy storage architecture starts with a comprehensive evaluation of your device's operational profile. Our senior application engineers collaborate with your technical team to define key mechanical, electrical, and environmental boundaries.

We guide global procurement and engineering teams through complex regulatory standards, thermal management constraints, voltage envelopes, and stringent shipping container regulations early in the design cycle to avoid costly redesigns.

Scope of Project

  • Device profile & duty cycle
  • Peak & continuous load analysis
  • Form factor & critical envelope

Electrical Parameters

  • Voltage, capacity & current limits
  • Overcharge & short-circuit protection
  • Cycle life expectations

Mechanical & Environmental

  • HAZLOC / ATEX enclosure requirements
  • Vibration, shock & thermal extremes
  • Custom connectors & potted casing
Engineers performing custom battery requirement analysis and computer modeling
Excell Battery custom BMS board design and electronics prototyping

Precision Engineering & Smart BMS Design

Partnering with Decades of Embedded Power Expertise

High-performance battery systems require specialized electronics to ensure maximum uptime and safety. Excell Battery's dedicated R&D engineering centers leverage over 40 years of power circuit design, firmware programming, and battery management system (BMS) integration expertise.

From SMBus, CANbus, and I2C smart monitoring protocols to SBS-compliant fuel gauging and active cell balancing, our engineers deliver custom hardware and software solutions that reduce total cost of ownership (TCO) through superior reliability.

In-House Engineering Facilities

  • Dedicated electrical, mechanical & firmware engineers
  • 3D CAD modeling & rapid thermal simulation
  • Custom smart BMS board development
  • Proprietary Criterion monitoring software compatibility

Vendor-Agnostic Premium Cell Selection

Optimizing Battery Performance Without Supply Chain Constraints

Unlike single-brand pack assemblers, Excell Battery maintains a strictly chemistry-agnostic approach. We source tier-one lithium-ion (Li-ion), lithium iron phosphate (LiFePO4), and primary lithium cells (Li-SOCl2, Li-MnO2) directly from top-grade global suppliers. Every cell batch undergoes rigorous verification in our internal testing labs under simulated field stress to confirm capacity, thermal stability, and cycle life prior to production integration.

Direct Audited Relationships with World-Leading Cell Manufacturers

Tadiran battery cell supplier partner
Saft battery cell manufacturer partner
NEC battery cell supplier
Murata battery cell manufacturer
JK battery cell supplier
Panasonic lithium battery cell supplier
FDK battery cell manufacturer
Lishen battery cell supplier
Molicel lithium-ion cell manufacturer
Samsung SDI battery cell supplier
Electrochem lithium cell manufacturer
EP battery cell supplier
Vitzro cell manufacturer partner
GP Batteries cell supplier
EnerSys battery cell manufacturer
Energizer battery cell supplier
Duracell battery cell supplier partner
Tracer battery cell manufacturer
LG Energy Solution battery cell supplier

North American & Global Manufacturing Redundancy

Excell Battery operates production facilities across North America equipped with automated spot welding, certified IPC-A-610 soldering operators, computerized battery analyzers, and climate-controlled assembly lines. Multiple production sites mitigate geopolitical and regional supply risks while streamlining international logistics.

Excell Battery North American and international manufacturing footprint

Geographic Redundancy

Dual-region manufacturing footprint ensures continuous delivery, buffer stock flexibility, and reduced exposure to supply disruptions.

100% Quality Auditing

Every production batch is tested for impedance, voltage tolerance, weld integrity, protection circuit actuation, and thermal behavior.

Traceability & Serialization

Complete component-level lot tracking from raw cell ingestion to finished assembly packaging for stringent OEM record-keeping.

Stringent Testing, HAZLOC & Transport Certifications

Uncompromising Safety Standards for Harsh Environments

Because lithium batteries store high energy density in compact packages, compliance with global safety standards is paramount. Excell Battery manages the complete regulatory verification pathway for client packs.

We build custom battery packs to conform with ATEX/HAZLOC explosive environment standards, UL 1642 / UL 2054 standards, IEC 62133 medical equipment mandates, and mandatory UN 38.3 lithium transport safety testing.

Compliance Engineering

  • UN 38.3 Transport Testing (T1-T8)
  • IEC 62133 / UL 2054 / CE Compliance
  • ATEX Zone 0 / Zone 1 HAZLOC Enclosures
  • Class I Division 1 Hazardous Locations
Robotic testing and safety verification for hazardous location battery packs

Comprehensive Battery Lifecycle & Recycling

Excell Battery provides a certified end-of-life battery recycling and reverse logistics program for all registered OEM clients. We facilitate environmentally responsible disposal and element reclamation in full compliance with local and international environmental protection standards.

Certified battery recycling program icon
"Juniper Systems has collaborated with Excell Battery for the design and manufacturing of multiple custom Li-Ion battery packs, resulting in many thousands of reliable battery pack shipments. Our multi-year partnership has proven their deep engineering competency, strict regulatory compliance, and personal, dependable customer support."
— Engineering Management, Juniper Systems

35+ Years of Quality Management Compliance

Manufactured under strict ISO 9001 certified procedures and validated by global accreditation agencies for absolute operational reliability in critical infrastructure.

ISO 9001 quality management system certification badge
Intertek testing mark
SWEDAC accreditation mark

Technical Design Articles & Insights

01

Design Proposal Case Study: Compact Li-Ion Battery for Outdoor Surveillance

Nov 24, 2025
02

Ensuring Safe Transit: Understanding UN 38.3 Battery Testing Standards

Apr 22, 2025
03

Cell and Cell Provider Considerations for OEM Engineering Teams

Dec 30, 2024

Power Your Application with Expert Engineering

Connect directly with our custom battery engineers to discuss your voltage, capacity, thermal, and regulatory requirements.

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