Battery Cell Coatings

摘要

A battery system includes a polyurea coating applied to a metal casing of a battery cell, wherein the polyurea coating is formed from a reaction mixture of an isocyanate component with ceramic particles, and an amine component with ceramic particles. The ceramic particle-filled polyurea coating exhibits a suitable thermal conductivity to substantially reduce thermal impedance to heat transfer from and to the battery cell, as well as sufficient electrical insulation.

主权项

1. A battery system, comprising:
a battery cell having a metal casing; and a polyurea coating on said metal casing, said polyurea coating being formed from a reaction mixture comprising:
(a) a first component having a viscosity of 100-2000 cP, and comprising isocyanate and ceramic particles, wherein said isocyanate comprises an isocyanate functional prepolymer; and(b) a second component having a viscosity of 100-2000 cP, and comprising an amine and ceramic particles, wherein said first and second components are sprayable under pressure and react to form said polyurea coating having a thickness, a thermal conductivity of at least 0.40 W/m*K, and a dielectric strength of at least 0.8 kV/mil of said coating thickness.