Lightweight flame-retardant new energy battery cell barrier pad

Abstract

This invention provides a lightweight, flame-retardant barrier pad for new energy battery cells, comprising two sets of protective layers, two sets of flame-retardant and heat-insulating layers, and a buffer support layer. The two sets of protective layers and the two sets of flame-retardant and heat-insulating layers are symmetrically distributed around the buffer support layer, and are bonded together with a high-temperature resistant, environmentally friendly adhesive. A silica waterproof coating is applied to the other side of each adjacent set of protective layers to isolate moisture. An edging is provided around each set of protective layers, connecting the two sets of protective layers, the flame-retardant and heat-insulating layers, and the buffer support layer into a single unit. The flame-retardant and heat-insulating layers are made of aerogel, which has high porosity and low density. The buffer support layer is made of polycarbonate foam, and the thin, lightweight polytetrafluoroethylene fiber protective layer significantly reduces the weight of the barrier pad, thus reducing the battery's weight. Furthermore, the aerogel with flame retardant provides fire resistance and heat insulation, while the coating provides waterproofing and corrosion resistance, reducing the risk of battery thermal runaway and short circuits.

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