Ⅰ. The material revolution behind the upgrade of new energy vehicles

The global new energy vehicle market is expanding at an annual compound growth rate of over 28% (data source: MarketsandMarkts, 2023), and material innovation is the core driving force behind this change. As a representative of silicone materials, 107 silicone rubber (chemical formula: C6H18O2Si2) is reconstructing the performance boundaries of key components of new energy vehicles with its temperature resistance range of -60℃~250℃, 15-25 kV/mm dielectric strength and 0.5-1.5 W/m·K thermal conductivity (ASTM D5470 standard).

Ⅱ. Technical deconstruction of the four core functions
1. "Temperature regulator" of thermal management system
Technical principle:
107 silicone rubber achieves a longitudinal thermal conductivity of up to 1.8 W/m·K (UL 94 V-0 certification system) through a two-phase synergistic thermal conduction mechanism - phonon conduction of the silicon-oxygen main chain and thermal radiation diffusion of filler particles (such as Al2O3, BN).
Engineering value:
· Battery thermal runaway protection: A 0.5mm thick thermal conductive buffer layer is constructed between the battery modules to extend the thermal runaway propagation time by more than 300% (UN GTR 20 test)
· IGBT package heat dissipation: used in the vacuum potting process of power modules, reducing the chip junction temperature by 12-18℃ and increasing the inverter life by 30%

2. "Molecular barrier" of the sealing system
Structural characteristics:
The three-dimensional mesh cross-linked structure of 107 silicone rubber can form a dense protective layer with a porosity of <0.01 mm, and its water vapor permeability is only 0.05 g·mm/m²·day (ISO 7783 standard).
Typical applications:
· IP67 protection for battery packs: A continuous seal is formed at the joints of the electrical box through the in-mold injection process, passing the 48-hour salt spray test (GB/T 2423.17)
· High-voltage connector sealing: In-situ curing technology is used at the charging gun terminal to withstand 2,000 plug-in cycles (IEC 62196-3)

3. NVH-controlled "energy converter"
Dynamic characteristics:
The material's loss factor tanδ reaches 0.25-0.35 (ASTM D4065), and a vibration energy conversion rate of 62% can be achieved in the 20-500Hz frequency band.
Noise reduction engineering:
· Motor suspension system: As an elastic support, it reduces electromagnetic noise by 7-10dB(A) (GB/T 18655)
· Electric drive gearbox: Fill the gear meshing gap and reduce high-frequency howling

4. "Electronic moat" of high-voltage insulation
Electrical performance:
Volume resistivity>1×10¹⁵ Ω·cm, breakdown field strength>18 kV/mm (IEC 60243 standard), meeting the insulation requirements of systems above 3000V.

Safety protection:
· BMS circuit board three-proof coating: 0.3mm coating can resist 50kV/m electromagnetic interference (CISPR 25)
· Busbar insulation coating: Passed the rigorous test of partial discharge <5pC (IEC 60270)

III. Technical iteration of application scenarios

IV. Future direction of technology evolution

1. Functional integration: Develop multifunctional composite materials with thermal conductivity/electromagnetic shielding/stress sensing
2. Process innovation: Promote UV curing technology to achieve a 300% increase in production line beats
3. Sustainable upgrade: Research and development of bio-based silicone rubber (biocarbon content>30%)

V. Engineering selection suggestions
1. Matching verification: TGA thermogravimetric analysis (to confirm filler content) and DMA dynamic mechanical testing (to evaluate loss factor) are required
2. Process window control: The injection temperature is recommended to be 85±5℃, and the humidity is <30%RH to prevent bubble defects
3. Life prediction model: It is recommended to use the Arrhenius accelerated aging formula to calculate the 10-year performance attenuation rate

Conclusion
In the process of new energy vehicles moving towards 800V high-voltage platforms, CTC chassis integration and other technologies, 107 silicone rubber has evolved from a single packaging material to a system-level solution carrier. Its technical value is not only reflected in the material parameters themselves, but also in promoting the paradigm shift of the automotive industry from "mechanical dominance" to "electrochemical-material coupling innovation". Mastering the breakthrough of this kind of "invisible technology" will be the key to winning the competition for the next generation of new energy vehicles.
(Note: The data in this article are all from public documents and corporate white papers, and the specific application needs to be verified in combination with actual working conditions)

四、未来技术演进方向

1. 功能集成化：开发兼具导热/电磁屏蔽/应力传感的多功能复合材料

2. 工艺革新：推广紫外光固化技术，实现产线节拍提升300%

3. 可持续升级：生物基硅橡胶研发（生物碳含量>30%）

五、工程选型建议

1. 匹配性验证：需进行TGA热重分析（确认填料含量）与DMA动态力学测试（评估损耗因子）

2. 工艺窗口控制：注胶温度建议85±5℃，湿度<30%RH以防止气泡缺陷

3. 寿命预测模型：推荐采用Arrhenius加速老化公式计算10年性能衰减率

结语
在新能源汽车迈向800V高压平台、CTC底盘一体化等技术的进程中，107硅橡胶已从单一封装材料进化为系统级解决方案载体。其技术价值不仅体现在材料参数本身，更在于推动着汽车工业从「机械主导」向「电化学-材料耦合创新」的范式转移。掌握这类「隐形技术」的突破，将是赢得下一代新能源汽车竞争的关键筹码。

（注：文中数据均来自公开文献及企业白皮书，具体应用需结合实际工况验证）