The invention relates to a lithium ion battery for automobiles. There is no lithium-ion battery for automobiles with reasonable structural design and stable performance. The invention includes a battery core, an upper cover, a positive terminal, a negative terminal and a shell, and is characterized in that it also includes a positive conductive metal sheet, a negative conductive metal sheet, a positive cover, a negative cover, a temperature detection protection plate and a metal isolation tank, The positive terminal includes a positive terminal body, a positive boss and a positive temperature test head. The positive conductive metal sheet is fixed on the positive ear of the battery cell, and the positive terminal body is fixed on the positive conductive metal sheet; the negative terminal includes a negative terminal body, a negative protrusion Table and negative electrode temperature test head, the negative conductive metal sheet is fixed on the negative ear of the battery cell, the negative terminal body is fixed on the negative conductive metal sheet; the wall of the casing is provided with a series of heat dissipation holes, and the wall surface of the casing is provided with heat dissipation holes. The inner walls are provided with several heat conduction grooves. The invention has reasonable structural design, good heat dissipation and stable performance.