Lithium battery module for electric vehicle

Abstract

The invention discloses a lithium battery module for an electric vehicle. The lithium battery module comprises a lithium battery shell, a lithium battery assembly and circuit breakers, wherein the lithium battery assembly is composed of a plurality of single-layer lithium battery packs arranged in a laminated way; the plurality of single-layer lithium battery packs are sequentially connected with one another in series from top to bottom; the circuit breakers are arranged between the adjacent single-layer lithium battery packs in series; each single-layer lithium battery pack is formed by connecting a plurality of lithium batteries in series; each lithium battery comprises a positive plate, a negative plate, a diaphragm and organic electrolyte; each diaphragm is arranged between each positive plate and each negative plate, and is composed of a non-woven base layer and polypropylene film layers; the polypropylene film layers are attached to the upper surface and the lower surface of each non-woven base layer; each negative plate comprises a current collector and an anode material; and each anode material is formed on the surface of each current collector and is a composite material of carbon layer-coated ferric oxide and nitrogen-doped graphene. The lithium battery module is simple in structure and high in safety; and the problems of an internal short circuit of each lithium battery, internal heat reduction of the lithium batteries and battery deformation are solved under the condition of not affecting the chemical property of a single lithium battery pack.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a lithium battery module used in the electric vehicle. Background technique [0002] With the improvement of people's living standards, people's requirements for the living environment are getting higher and higher, and the voice of reducing the harmful emissions of automobiles is increasing day by day. Environmental pollution is the biggest challenge facing the automobile industry. At present, domestic oil reserves and production are quite limited. With the increase of car ownership, the demand for oil is increasing. At present, it is no longer self-sufficient. The shortage is mainly met by imports, and the trend is increasing every year. [0003] An electric vehicle refers to a vehicle powered by a vehicle-mounted power supply, driven by a motor to drive the wheels, and conforming to the requirements of road traffic and safety regulations. Because electric vehicles have outsta...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is how to overcome the defects of existing lithium-ion power batteries such as poor safety, low lithium battery capacity, and fast attenuation.

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