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VEK-32700 70Ah – 25UT Cylindrical Sodium-ion Cell

Balanced Power & Capacity for Daily Use70AhRated Capacity3.1VNominal Voltage4000+ cyclesCycle Life-40℃~60℃Operating Temp

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Key Features & Advantages

What makes the 25UT the ideal choice for your application

Technical Specifications

Detailed parameters for the 25UT cylindrical sodium-ion cell

Basic Parameters

Model	VEK-32700-70Ah (25UT)
Size Code	32700
Diameter	32 ± 0.3 mm
Height	70 ± 0.5 mm
Weight	1380 ± 30 g
Casing Material	Nickel-plated Steel

Electrical Performance

Nominal Capacity	70Ah
Nominal Voltage	3.1V
Charge Voltage	3.65V
Discharge Cut-off	1.5V
Standard Charge	0.5C CC/CV
Max Continuous Discharge	2C (140A)
Peak Discharge (10s)	4C (280A)
Energy Density	152 Wh/kg
Impedance (AC 1kHz)	≤7 mΩ

Environmental Parameters

Charge Temperature	0℃ ~ 55℃
Discharge Temperature	-40℃ ~ 60℃
Storage Temperature	-20℃ ~ 45℃
Storage Humidity	<85% RH
IP Rating	IP67

Mechanical Parameters

Vibration Resistance	IEC 60068-2-6
Shock Resistance	IEC 60068-2-27
Drop Test	1.5m onto concrete

Certifications

Safety	CE, UL 1973, IEC 62619
Transport	UN38.3
Environmental	RoHS, REACH
Quality	ISO 9001 / ISO 14001

Product Structure

The 25UT features a precision-engineered cylindrical design with advanced internal architecture:
• **High-quality electrode winding** – Consistent tension for uniform current distribution
• **Multi-tab design** – Reduced internal resistance for high-rate discharge
• **Ceramic-coated separator** – Enhanced thermal stability and safety
• **Robust nickel-plated steel casing** – Corrosion-resistant and durable
• **Built-in CID & PTC protection** – Pressure and temperature safety mechanisms
• **Advanced electrolyte formulation** – Optimized for low-temperature performance

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Recommended Applications

The 25UT is ideal for the following applications

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