Lithium ion battery for electric automobile

Abstract

The invention belongs to the field of lithium ion batteries, and provides a lithium ion battery for an electric automobile. The lithium ion battery comprises a battery cell 3, a thermal insulation layer 2, a heating body 4, an electric connecting wire 5, an electrode 6 and a shell; the heating body 4 is packaged at the position, tightly attached to the battery cell, in the battery; the battery cell makes direct contact with the heating body; the heating rate of the battery can be remarkably increased; the thermal insulation layer 2 is arranged outside the heating body to reduce heat dissipation, and therefore the heating efficiency is further improved; and a temperature adjusting layer made of a phase change material is arranged on the battery shell, so that the phase change material absorbs heat of the battery to dissipate the heat when the temperature of the battery is too high, the phase change material releases heat when the temperature of the battery is lower than a certain value,so that the temperature of the battery can be kept; and meanwhile, a reasonable heat dissipation structure is also arranged, so that the normal use of the battery in a high-low temperature environment is ensured.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a lithium ion battery for electric vehicles. Background technique [0002] With the vigorous development of electric vehicles, whether the battery system as its power source can provide continuous power under different working conditions is a major issue that needs to be considered in this field. [0003] As we all know, the performance of lithium-ion batteries is very susceptible to the impact of ambient temperature, too high or too low temperature will have a great impact on the performance of lithium-ion batteries. Patent CN204375854U discloses a lithium battery for electric vehicles, mainly disclosing a heat dissipation structure for the lithium ion battery to dissipate heat. However, lithium batteries cannot be charged under low temperature conditions, and their discharge capacity is also greatly attenuated, resulting in extremely unstable working performance of lithium-ion batterie...

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