Analysis of the Application and Function of High-Silicon Oxygen Cloth in New Energy Battery Packs

1. Introduction

With the rapid development of the new energy vehicle industry, the safety and performance optimization of power batteries have become the focus of industry attention. As a core component of electric vehicles, the battery pack's thermal management, insulation protection and structural strength directly affect the battery's lifespan and safety. High-Silica Fiber Cloth, as a high-performance inorganic fiber material, plays an important role in new energy battery packs due to its excellent high-temperature resistance, insulation and fire resistance properties.

2. Characteristics of high-silicon oxygen cloth

High-silica cloth is woven from high-purity silica (SiO₂≥96%) fibers and has the following key characteristics:

High-temperature resistance: It can withstand temperatures above 1000℃ for a long time, and the short-term temperature resistance can reach 1600℃, far exceeding that of ordinary glass fiber.

Excellent insulation performance: High resistivity, suitable for insulation protection of high-voltage battery systems.

Low thermal conductivity: Effectively reduces heat conduction and enhances the thermal management capability of the battery pack.

Chemical stability: Resistant to acid and alkali corrosion, suitable for complex working conditions and environments.

Fireproof and flame-retardant: Non-flammable, smokeless, non-toxic, and complies with battery safety standards (such as UL94 V0).

3. Application of High-Silicon Oxygen Cloth in New Energy Battery Packs

3.1 Battery thermal protection and heat insulation

During the charging and discharging process of power batteries, a large amount of heat is generated. If heat accumulates, it may lead to thermal runaway. High-silicon oxygen cloth can be used for:

Insulation layer between battery modules: Reduces heat transfer between battery cells and prevents heat diffusion.

Battery pack fire barrier: Wrapping high-silicon oxygen cloth inside or outside the battery pack to delay the spread of flames and enhance safety.

3.2 High-voltage insulation protection

New energy battery packs typically adopt high-voltage systems (400V/800V), and insulation protection is of vital importance. High-silicon oxygen cloth can be used for:

Battery electrode sheet isolation: Prevents short circuits between the positive and negative electrodes.

High-voltage wiring harness wrapping: Enhance insulation to reduce the risk of high-voltage breakdown.

3.3 Structural Reinforcement and Shock Absorption

High-silicon oxygen cloth can be combined with composite materials and used for:

Battery pack shell reinforcement: Enhance impact resistance and mechanical strength.

Buffer and shock absorption layer: Reduces the impact of vehicle vibrations during operation on the battery.

3.4 Fire Safety and Thermal Runaway Protection

In extreme cases (such as battery thermal runaway), high-silicon oxygen cloth can:

Delay the spread of the fire and buy escape time for passengers.

Reduce the release of toxic gases and enhance safety.

4. Comparison of High-silicon oxygen Cloth vs. Other Materials

5. Market application cases

Tesla: Some models use high-silicon-oxygen composite materials as the battery fireproof layer.

CATL (Contemporary Amperex Technology Co. Limited) : Applying high-silicon oxygen cloth insulation solutions in high-energy-density battery packs.

BYD: The Blade battery pack uses high-silicon oxygen cloth to enhance safety protection.

6. Future Development Trends

As the energy density of batteries increases, the demand for safety materials will become more stringent. High-silicon oxygen cloth is expected to further develop in the following directions:

Lightweight improvement: Combined with materials such as carbon fiber to reduce weight.

Intelligent integration: Combined with sensors to achieve real-time thermal monitoring.

Cost optimization: Reduce prices and increase popularity through large-scale production.

7. Conclusion

High-silicon oxygen cloth, with its outstanding high-temperature resistance, insulation and fire resistance, plays a key role in new energy battery packs, effectively enhancing battery safety and thermal management capabilities. With the continuous improvement of safety standards in the new energy vehicle industry, the application prospects of high-silicon oxygen cloth will be even broader. In the future, through material optimization and process improvement, its cost performance and market penetration rate are expected to further increase.