Custom Wide-Temperature Battery Packs
Built Around UltraXel Wide-Temperature Cells
UltraXel Cell Platforms
14500, 18650, 21700 and 32140 wide-temperature cylindrical cells.
Cell-to-Pack Engineering
Cell selection, pack configuration, BMS, NTC, wiring, connectors and mechanical integration.
OEM Project Support
Prototype development, validation testing, pilot production and production support.
Custom Lithium Battery Pack Design Support
Requirement Review
Confirm application, voltage, capacity, current, size and temperature requirements.
Cell & Pack Design
Define cell selection, electrical configuration, structure and protection design.
Prototype Development
Integrate BMS, NTC, wiring and connectors, then build samples.
Testing & Certification
Verify electrical, thermal, safety and environmental performance.
Pilot Production
Validate materials, assembly processes and product consistency.
Mass Production Support
Support quality control, packaging, production and delivery.
Requirement & Design
Project Requirements
Define voltage, capacity, runtime, temperature, charging method, and certification needs.
Electrical Design
Define series-parallel structure, voltage platform, current output, and protection logic.
Pack Structure Design
Design cell layout, insulation, enclosure fit, wiring space, and mechanical protection.
Prototype Development
BMS / NTC / Connector Integration
Integrate protection, temperature sensing, wire harness, connector type, pin definition, and cable length.
Prototype Sample
Build samples for device fitting, charging verification, and early-stage testing.
Testing & Certification
Testing and Validation
Support electrical, thermal, aging, safety, vibration, and environmental testing.
Certification Support
Support UN38.3, CCC, CE, CB, UL, IEC or project-specific certification requirements.
Production Support
Produce small batches for trial assembly, field testing, and design adjustment.
Mass Production
Support stable production, quality control, batch consistency, packaging, and delivery.
Key Engineering Considerations for Custom Battery Pack Design
Application Load Profile
Standby current, working current, peak current, pulse duration, duty cycle and cut-off voltage to define capacity, discharge rate and runtime margin.
Voltage Platform & Pack Configuration
Nominal voltage, operating voltage range, series-parallel structure, charger voltage and system cut-off logic.
Cell Chemistry & Model Selection
Suitable UltraXel wide-temperature cells based on chemistry, capacity, discharge current, temperature performance, cycle life, calendar life and safety needs.
Temperature Exposure & Thermal Behavior
Cold start, low-temperature discharge, high-temperature storage, enclosure heat buildup, charging temperature and NTC placement.
Charging Method & Standby Conditions
CC/CV charging, solar charging, standby charging, float charge conditions, charge current, charge time and temperature protection.
Protection Circuit & BMS Logic
Overcharge, over-discharge, over-current, short circuit, temperature protection, cell balancing and communication requirements where needed.
Mechanical Fit & Pack Structure
Pack dimensions, cell layout, insulation, wire routing, connector position, vibration resistance, strain relief and enclosure compatibility.
Reliability Testing & Certification Schedule
Electrical testing, thermal testing, aging, cycle life, vibration, safety testing, UN38.3, CB, UL, IEC or project-specific certification support.
Why OEMs Choose UltraXel？
Wide-Temperature Cell Expertise
Wide-temperature lithium cells deliver reliable performance from −40°C to +85°C in demanding applications.
Engineering & Testing Support
Support for electrical, thermal, aging, safety, vibration and environmental testing throughout development.
Quality & Compliance Control
Quality management based on IATF 16949 and ISO 13485, with project-specific certification support.
Prototype-to-Production Support
From engineering and samples to pilot production and volume manufacturing, all supported by one team.
Custom Battery Pack Now
Share your project details for datasheet requests, sample evaluation and battery pack support.
Project Support
Typical information to share: application, voltage, capacity, temperature range and annual quantity.
You can also request a datasheet or sample for evaluation.