Separator of lithium-ion battery

Product Portfolio

Separator is a key material for lithium-ion batteries. Its primary function is to separate the positive and negative electrodes, preventing short circuits while allowing electrolyte ions to pass through. The company has developed a wide range of product solutions, including three major series with dozens of variants to meet customer demands.
Dry Process Separator

Double-Layer Separator / Single-Layer Separator / High-Toughness Separator

Applications:

Based on different porosity and pore size characteristics, these separators are used in:

  • Electric vehicles (EVs)

  • Power tools

  • Energy storage devices

  • 3C electronic products (computers, communication, and consumer electronics)

Features:

  1. Double-Layer Separator

    • Dual-layer composite separator with a high safety factor

    • This series has been stably supplied to well-known international battery manufacturers for a long time

  2. Single-Layer Separator

    • High strength with excellent thickness and air permeability consistency

    • Suitable for high-energy-density batteries and coated base membranes

    • Has been stably supplied to overseas customers since 2013

  3. High-Toughness Separator

    • Offers enhanced protection during battery heavy impact and edge safety tests, preventing direct contact between positive and negative electrodes

    • Features ultra-small micropore sizes with highly uniform distribution

    • Strength improved by more than 20% compared to previous products

Wet-Process Separator

Wet-Process Biaxial Stretching

Applications:

  • High-performance lithium-ion batteries

Features:

  1. High-Performance Lithium-Ion Battery Wet-Process Separator

    • Available in single-layer or multi-layer designs

    • Uniform pore size distribution

    • High MD/TD tensile strength and high puncture resistance

    • Excellent thermal stability

    • Good permeability, high porosity, and low resistance

  2. High-Performance Lithium-Ion Battery Wet-Process Separator

    • Thin design for high energy density and high strength for enhanced safety

    • 5µm thickness: Designed for consumer electronics lithium-ion batteries

    • 7µm thickness: Suitable for consumer electronics lithium-ion batteries and some high-energy-density power lithium-ion batteries

    • Mass-produced and supplied to top-tier domestic and international manufacturers

Coated Separator

Water-based PVDF + Nano-ceramic Hybrid Coating

Nano-resin Single-sided/Double-sided Coated Separator

Ceramic Coating / Resin Coating / Water-based PVDF + Nano-ceramic Hybrid Coating / Nano-resin Coating Film

Applications:

Applicable to various lithium-ion power batteries, including electric vehicles, electric bicycles, power tools, and energy storage systems.

Features:

  1. Ceramic Coated Separator

    • Independently developed coating with low moisture content and low thermal shrinkage.

    • Uniform ceramic particle size with excellent surface smoothness.

    • Porous coating structure with evenly distributed pore size.

    • High coating consistency: Coating thickness = Target thickness ±1μm.

  2. Resin Coated Separator

    • Water-based coating, environmentally friendly.

    • Strong adhesion to electrodes, enhancing the hardness of pouch batteries.

    • Excellent coating consistency: Coating thickness (0~1μm).

  3. Water-based PVDF Coated Separator

    • Superior electrolyte retention, improving battery cycling performance.

    • Strong adhesion to electrodes, increasing battery hardness.

    • Excellent thermal stability for enhanced safety.

    • High oxidation resistance, meeting the demands of high-voltage batteries.

  4. Nano-resin Coated Separator

    • Water-based coating, environmentally friendly.

    • Strong adhesion to electrodes, enhancing battery hardness.

Digital Factory

  • Project 1: Introduction of Intelligent Production Management System

  • Project 2: Introduction of AGV logistics system

  • Project 3: Extensive introduction and usage of robots

  • Project 4: Put into operation of the entire imported automated production lines

  • Project 5: Introduction of Automatic Storage System

  • Project 6: Full process digital adaptive production system

  • Project 7: Paperless office

  • Project 8: Fool-Proof System for the whole separator production process

Intellectual Property Patent

As of January 2024, the company holds 500 domestic and foreign patent applications (of which overseas patents account for 21.5%). “A preparation method of microporous diaphragm and microporous diaphragm” won the “China Patent Excellence Award” issued by the State Intellectual Property Office. In 2018, the company was rated as “Guangdong Intellectual Property Advantage Enterprise” by Guangdong Intellectual Property Protection Association.

Quality Guarantee

Strictly control the quality of products, from the import of raw materials to the production of finished separator, an average of more than 3,000 standard controls are required.

We passed ISO9001 and ISO14001 system certification in 2008 and IATF16949 system certification in 2014. And we are establishing the process audit standard of VDA6.3 of German Automotive Industry Association and Japanese hazardous material management system (GP).