Judging the quality of a PE battery separator in a lead-acid battery involves assessing several key factors:

1. High-quality PE separators are made from premium-grade polyethylene materials that are durable, chemical-resistant, and thermally stable. They should have consistent thickness and density, ensuring uniform performance across the entire battery.

2. The separator's pore structure is crucial for maintaining electrolyte circulation and preventing internal short circuits. A high-quality PE separator will have a well-defined and uniform pore structure, allowing for efficient ion transport while minimizing the risk of dendrite formation and battery failure.

3. The separator should maintain its dimensional stability and structural integrity under the harsh operating conditions of a lead-acid battery, including exposure to acid, heat, and mechanical stress. It should resist shrinking, swelling, or warping over time, ensuring long-term reliability and performance.

4. A good-quality PE separator will have low electrical resistance, facilitating efficient charge and discharge processes within the battery. Low resistance helps minimize energy losses and heat generation, leading to improved battery efficiency and longevity.

5. The separator should be chemically compatible with the electrolyte and other components of the lead-acid battery. It should not degrade or react with the electrolyte, leading to contamination or performance degradation over time.

6. Look for PE separators manufactured by reputable companies that adhere to strict quality control standards and certifications. Products from ISO-certified facilities or those compliant with relevant industry standards are more likely to meet high-quality requirements.

7. Consider conducting performance tests or consulting independent laboratory evaluations to assess the separator's performance under simulated operating conditions. Test results can provide valuable insights into the separator's mechanical strength, electrical properties, and overall reliability.

By evaluating these factors, you can judge whether a PE battery separator in a lead-acid battery is of high quality and suitable for your specific application. Remember to prioritize material quality, pore structure, dimensional stability, electrical resistance, chemical compatibility, manufacturing standards, and performance testing when assessing separator options.