Innovative PTFE Sealing Architectures for Electric Vehicle Battery Trays

Electric vehicle battery trays are the largest core structural components of automotive power battery systems, undertaking the functions of battery module bearing, overall sealing protection, heat dissipation and shock absorption. The battery tray has a large sealing area and complex structural edges, and needs to face severe working conditions such as vehicle driving vibration, road bump impact, all-weather temperature alternation and outdoor environmental erosion. Traditional battery tray sealing adopts single-layer rubber strip sealing structure, which has defects such as poor overall sealing consistency, easy local aging failure and insufficient impact resistance. Innovative PTFE sealing architectures break through the limitations of traditional single sealing structure and build a multi-dimensional, high-stability and long-life sealing system for electric vehicle battery trays PTFE SHEET.

The innovative PTFE sealing architecture adopts integrated frame sealing + local reinforced composite sealing design, which is specially optimized for the large-area and multi-edge structural characteristics of electric vehicle battery trays. The integral PTFE frame sealing structure realizes full-circle seamless sealing of the battery tray shell, eliminating local leakage hidden dangers of segmented splicing seals. The local reinforced PTFE sealing parts are arranged at the stress concentration positions such as tray corners, wiring holes and fixed holes, improving the compression resistance and impact resistance of key sealing positions, solving the problem of easy failure of weak positions of traditional tray sealing.

Different from traditional single elastic sealing structure, PTFE innovative sealing architecture combines the advantages of PTFE’s anti-aging, anti-corrosion and low-friction performance with elastic buffer structure. The bottom PTFE anti-friction isolation layer can reduce the friction and wear between the battery tray and the vehicle body during driving vibration, avoiding sealing layer damage caused by long-term friction. The middle elastic compression layer ensures tight fitting sealing, and the outer anti-weathering layer resists external environmental erosion, realizing multi-layer composite protection PTFE TUBE.

In terms of extreme working condition adaptation, the innovative PTFE sealing architecture has excellent vibration fatigue resistance and thermal cycle stability. It can withstand long-term bump vibration and high-frequency alternating temperature impact of vehicle operation, without sealing loosening, cracking and aging failure. The excellent waterproof and dustproof performance meets the IP67 and above high-level protection standards of automotive battery trays, effectively preventing rainwater, road dust and sediment from entering the tray, and protecting the safe operation of internal battery modules.

At present, innovative PTFE sealing architectures have been applied to the tray sealing of many mainstream new energy vehicle models. Compared with traditional sealing schemes, the service life of battery tray sealing is increased by more than twice, and the failure rate is reduced by more than 70%. It has become an advanced sealing technology for high-end electric vehicle battery trays, effectively improving the overall safety and durability of automotive power battery systems.