As battery energy storage systems become more compact and powerful, reliable battery monitoring is essential.

A CCS (Cell Contact System) uses sensing cables to collect cell voltage and temperature signals and send them to the Battery Management System (BMS). These cables work inside battery modules and cabinets, where temperature changes, vibration, bending, and limited installation space can create challenges.

Among the available options, UL10588, UL1332, AF200, and UL3132 are important choices for high-temperature CCS applications. But each has a different performance focus.

1. Quick Comparison

According to the source material, UL10588, UL1332, and AF200 all provide a 200°C temperature rating, while the silicone cable is rated at 150°C. UL10588 is also the only one of the four with a 600V rating.

2. UL10588: High-Performance FEP CCS Cable

UL10588 uses FEP insulation and is designed for demanding CCS applications.

Key specifications include:

• 600V rated voltage
• 200°C long-term temperature rating
• -40°C to 200°C working temperature range
• FEP insulation

Its main strengths are electrical stability and environmental resistance. The source material highlights its resistance to ozone, UV, moisture, and solvents. It can also be used in demanding environments such as liquid-cooled energy storage systems and high-humidity enclosed cabinets.

Best for:

High-temperature and higher-voltage CCS applications

UL10588 is a strong choice when both temperature and voltage requirements are demanding.

3. UL1332: 200°C FEP Wire for General CCS Applications

UL1332 is a widely used FEP high-temperature electronic wire.

Its key specifications include:

• 300V rated voltage
• 200°C long-term temperature rating
• -40°C to 200°C working temperature range
• FEP insulation

It provides good high-temperature resistance, flame-retardant performance, aging resistance, and electrical insulation. Its mature processing technology also makes it suitable for mass-produced CCS harnesses.

Best for:

Conventional battery modules and general high-temperature CCS applications

Compared with UL10588, its main limitation is the lower voltage rating and weaker suitability for high-humidity or liquid-cooled environments.

4. AF200: Flexible FEP Wire for Compact CCS

AF200 is another 200°C FEP wire, but its main advantage is flexibility.

The source material identifies AF200 as having the best flexibility and smallest cable diameter among the main cable types discussed. This makes it suitable for precise wiring in small spaces.

Key advantages:

• 200°C temperature rating
• FEP insulation
• Excellent flexibility
• Small diameter
• Easy routing

Best for:

Compact battery modules and space-limited CCS wiring

When installation space is tight, cable flexibility can be more important than simply choosing the highest voltage rating.

5. UL3132: Flexible Silicone Rubber CCS Cable

UL3132 uses silicone rubber insulation and provides a 150°C temperature rating and 300V voltage rating according to the source material.

Its main advantage is flexibility and easy processing.

Compared with FEP cables, silicone rubber cables can provide a soft and flexible cable structure, making them easier to install and assemble.

Best for:

Flexible CCS wiring where 150°C temperature resistance is sufficient

However, the source material notes that silicone cables have lower long-term high-temperature aging performance than the FEP options.

6. FEP vs Silicone Rubber: Which Is Better?

There is no single answer.

FEP

Used by:

• UL10588
• UL1332
• AF200

Main advantages:

• Higher temperature rating
• Strong insulation performance
• Good aging resistance
• Better long-term stability

Silicone Rubber

Used by:

• UL3132

Main advantages:

• Soft and flexible construction
• Easy processing
• Good bending performance

In simple terms:

FEP focuses more on high-temperature and long-term stability, while silicone rubber focuses more on flexibility and easy processing.

The source material also notes that FEP cables generally provide stronger long-term stability, while silicone cables may age faster in high-temperature enclosed environments.

7. 200°C vs 150°C: How Much Temperature Resistance Do You Need?

This is one of the most important questions when choosing a CCS cable.

Choose 200°C cables when:

• The cable is close to high-temperature battery cells
• The battery module has significant local heat
• The application requires a wider temperature range
• Long-term thermal stability is important

Suitable options include:

UL10588 / UL1332 / AF200

Choose 150°C cables when:

The actual application temperature is within the cable’s rated range and the project does not require a 200°C cable.

A possible option is:

UL3132

A higher temperature rating is not automatically better. The cable should match the actual operating conditions.

8. 600V vs 300V: Why Does Voltage Rating Matter?

The four cable types have different voltage ratings.

UL10588 → 600V

UL1332 → 300V

AF200 → 300V

UL3132 → 300V

Therefore, if the application requires a 600V-rated cable, UL10588 has a clear advantage among these four options.

Always check the required voltage rating before selecting a cable.

9. Which Cable Is Best for Tight Battery Spaces?

CCS wiring often needs to fit into compact battery modules.

In this situation, flexibility and cable diameter become important.

AF200

The source material identifies AF200 as the most flexible and smallest-diameter option among the main cable types.

Best for:

Compact and precise wiring.

UL3132

Silicone rubber also provides good flexibility and easy processing.

Best for:

Flexible installation where 150°C is sufficient.

Therefore:

For compact high-temperature wiring, consider AF200. For flexible silicone wiring, consider UL3132.

10. UL10588 vs UL1332 vs AF200 vs UL3132

11. Which Cable Should You Choose?

A simple selection guide can help.

Choose UL10588 if:

You need:

200°C + 600V + demanding environmental performance

It is suitable for high-performance CCS applications.

Choose UL1332 if:

You need:

200°C + 300V + reliable general-purpose FEP performance

It is suitable for conventional battery modules and mass-produced CCS harnesses.

Choose AF200 if:

You need:

200°C + excellent flexibility + small cable diameter

It is suitable for compact battery modules and tight wiring spaces.

Choose UL3132 if:

You need:

150°C + 300V + flexible silicone rubber construction

It can be considered when the application temperature and other requirements are within its rated range.

12. A Simple CCS Cable Selection Process

Before choosing a cable, check these five points:

Step 1: Check Temperature

Need 200°C?

→ UL10588 / UL1332 / AF200

150°C is enough?

→ UL3132 may be considered.

Step 2: Check Voltage

Need 600V?

→ UL10588

300V is sufficient?

→ UL1332 / AF200 / UL3132

Step 3: Check Flexibility

Very tight installation space?

→ AF200 / UL3132

Step 4: Check Environment

Consider:

• Humidity
• Liquid cooling
• Vibration
• Ozone
• Aging
• Chemical exposure

UL10588 has broader environmental resistance according to the source material.

Step 5: Check Production Requirements

For large-scale CCS harness production, cable processing, cutting, stripping, and crimping performance should also be considered.

13. Frequently Asked Questions

What is the main difference between UL10588 and UL1332?

Both are 200°C FEP cables. The main difference is voltage rating: UL10588 is 600V, while UL1332 is 300V.

What is the main advantage of AF200?

AF200 focuses on flexibility and small diameter, making it suitable for compact CCS wiring.

Is UL3132 suitable for energy storage CCS?

It can be considered when the application requires 150°C / 300V performance and benefits from flexible silicone rubber construction.

Is FEP better than silicone rubber?

Not always. FEP is better suited to demanding high-temperature applications, while silicone rubber can be attractive when flexibility and easy processing are priorities.

Which cable is best for high-temperature CCS?

Among these four options, UL10588, UL1332, and AF200 all provide a 200°C rating. The final choice depends on voltage, flexibility, environment, and installation requirements.

Conclusion

UL10588, UL1332, AF200, and UL3132 each have a different role in energy storage CCS applications.

• UL10588 → 200°C + 600V + demanding environments
• UL1332 → 200°C + 300V + general high-temperature CCS
• AF200 → 200°C + excellent flexibility + small diameter
• UL3132 → 150°C + 300V + flexible silicone rubber

The best cable is not simply the cable with the highest rating.

The right choice should follow:

Temperature → Voltage → Flexibility → Environment → Installation Requirements

For CCS harness designers and BESS manufacturers, matching the cable to the actual application is the key to reliable battery signal collection and long-term system performance.