Lithium battery and electrode plate structure

摘要

A lithium battery is provided. The lithium battery comprises an positive electrode plate having a first surface, a negative electrode plate having a second surface, a first thermal insulating layer and a separator. The first surface is opposite to the second surface. The thermal insulating layer is disposed on one of the first surface and the second surface. The thermal insulating layer is comprised of an inorganic material, a thermal activation material and a binder. The separator is disposed between the positive electrode plate and the negative electrode plate.

主权项

1. A lithium battery, comprising:
a positive electrode plate, wherein the positive electrode plate has a first surface; a negative electrode plate, wherein the negative electrode plate has a second surface and the second surface is opposite to the first surface of the positive electrode plate; a first thermal insulating layer located on one of the first surface and the second surface, wherein the first thermal insulating layer is comprised of an inorganic material, a thermal activation material and a binder, wherein the thermal activation material in forms of a plurality of particles distributes in the binder and a surface of each of the plurality of particles of the thermal activation material has a polymer thin film coated thereon, wherein while a temperature of the lithium battery increases to a first temperature, the polymer thin film cracks and the thermal activation material enclosed by the polymer thin film is released and a cross-linking reaction of the thermal activation material initiates and the thermal activation material is converted into a polymer so that a diffusion of the lithium ions is blocked by the polymer and the conductivity of the electrolyte decreased; and a separator located between the positive electrode plate and the negative electrode plate.