▎ 摘　　要

NOVELTY - The utility model claims a lithium ion battery, comprising a battery shell; the interior of the battery shell comprises multiple battery pole groups arranged in parallel in the longitudinal direction; there is longitudinal gap between any two adjacent battery pole groups; each longitudinal gap is respectively provided with a first heat conducting sheet; the front and back sides of the first heat conducting sheet are respectively adhered with two adjacent battery pole groups; the first heat conducting sheet comprises a graphene sheet; two sides of the graphene sheet are respectively provided with a layer of PET film; the bottom of each first heat conducting sheet is provided with a bending part towards the heat conducting sheet; the bottom of the bending part of the heat conducting sheet is adhered with the inner side surface of the bottom of the battery shell through the insulated heat conducting glue; each layer of PET film is uniformly distributed with multiple electrolyte absorption storage holes. The utility model not only can improve the high temperature performance of the battery, but also is good for the external heating device to heat the internal of the battery, enhancing the low temperature performance of the battery, also can enhance the electrolyte storage and supplement performance of the battery, and improve the circulation performance of the battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the ion battery lithium to claim.