Dry Process Lithium Battery Separator

Product Overview

Huizhou BestGemo New Energy offers the Dry Process Lithium Battery Separator, a polypropylene (PP) based membrane engineered for modern power and energy-storage lithium batteries. This separator is manufactured using a dry-process method, which provides a balanced combination of mechanical integrity and thermal performance. As a core component within the battery cell, its role is to prevent electrical short circuits between the anode and cathode while permitting efficient ionic transport, directly influencing cell safety and cycle life.

Our dry-process separator is specifically designed to meet the operational demands of lithium iron phosphate (LFP) chemistries, which are prevalent in electric vehicles and stationary energy storage systems. The material's inherent thermal resistance, with a rated tolerance of ≥150°C, contributes to a wider safe operating window for the battery. Furthermore, the customizable thickness allows battery manufacturers to fine-tune energy density and mechanical strength according to their specific cell design requirements, making this separator a reliable and practical choice for high-volume production environments.

Key Features

• Thermal Resistance (≥150°C): The PP base material provides a high melting point, helping to maintain separator integrity and reduce the risk of thermal runaway in elevated temperature conditions.
• Controlled Porosity (35% ~ 45%): This carefully maintained porosity range supports consistent ionic conductivity while retaining sufficient mechanical strength for electrode handling and cell assembly.
• Customizable Thickness: The separator thickness is produced to customer specifications, enabling optimization of battery internal resistance, energy density, and overall cell balance.
• Chemical Stability: Polypropylene offers good resistance to the electrolyte solvents and lithium salts used in common LFP battery formulations, promoting long-term performance stability.
• Cost-Effective Dry Process: The dry-stretch manufacturing method offers a favorable balance of performance and production cost efficiency, suitable for mainstream LFP applications.
• Uniform Material Structure: The dry-process yields a consistent pore structure, which contributes to more predictable wetting behavior and uniform current distribution across the electrode surface.

Technical Specifications

Applications

This separator is optimized for use in rechargeable lithium batteries that prioritize safety, longevity, and cost-effectiveness. Its material properties align well with the operational envelope of LFP cathodes, providing the necessary thermal stability for demanding charge-discharge cycles and high-capacity cells.

• Electric vehicle (EV) power batteries, including passenger cars and commercial buses.
• Stationary energy storage systems (ESS) for grid peak shaving and renewable energy integration.
• Residential and commercial battery energy storage units requiring enhanced safety margins.
• High-capacity lithium battery cells designed for long-duration discharge and cycling.

Quality Assurance

• Strict and systematic quality management procedures are implemented at every stage of the production workflow, from raw material inspection to final packaging.
• Each batch undergoes a full inspection protocol prior to shipment to verify dimensional consistency, porosity levels, and absence of physical defects.
• We provide technical support to assist customers in evaluating the separator's performance within their specific battery architecture and testing protocols.
• Product samples are available upon request to facilitate pre-production validation and integration testing.

OEM/ODM Customization

We understand that different battery designs require specific separator characteristics. Our production line supports OEM and ODM collaborations where the separator thickness and roll dimensions can be adjusted to match your cell winding or stacking equipment. Please contact our engineering team with your target specifications to discuss how our dry-process separator can be tailored to your application requirements.