A button-type lithium ion battery, comprising: a metal housing; a cell (9, 18), received in the metal housing; a terminal (6, 15), disposed on an outside of the metal housing; at least one first electrode tab (10, 19), arranged on the cell (9, 18) and electrically connected to the metal housing; at least one second electrode tab (4, 13), arranged on the cell (9, 18) and electrically connected to the terminal (6, 15); and an insulating member (5, 14) disposed between the metal housing and the terminal (6, 15); wherein the insulating member (5, 14) is insulating and sealing the metal housing and the terminal (6, 15); a polarity of the at least one first electrode tab (10, 19) is opposite to that of the at least one second electrode tab (4, 13); a polarity of the metal housing is opposite to that of the terminal (6, 15); the metal housing and the terminal (6, 15) are sealing connected to the insulating member (5, 14) by means of heat or adhesion; characterized in that a first insulating layer (21, 22) is arranged between the second electrode tab (4, 13) and the metal housing; the metal housing comprises a metal shell (1, 12), and a cover plate (2, 11) disposed at a side of the metal shell (1, 12) and sealing connected to the metal shell (1, 12); the cell (9, 18) is received in the metal shell (1, 12); the at least one first electrode tab (10, 19) is electrically connected to the metal shell (1, 12) or the cover plate (2, 11); the terminal (6, 15) is disposed on an outer side of the metal shell (1, 12) or the cover plate (2, 11), and insulating and sealing the metal shell (1, 12) or the cover plate (2, 11) via the insulating member (5, 14); a safety vent (3, 20) is arranged on an inner or outer end surface of the metal shell (1, 12), the cover plate (2, 11) or the terminal (6, 15) to vent an internal overpressure; an injection hole (7, 16) is defined on a surface of the metal shell (1, 12) or the cover plate (2, 11); a cover sheet (8, 17) is arranged on an outside of the metal shell (1, 12) or the cover plate (2, 11) for sealing the injection hole (7, 16). a metal housing; a cell (9, 18), received in the metal housing; a terminal (6, 15), disposed on an outside of the metal housing; at least one first electrode tab (10, 19), arranged on the cell (9, 18) and electrically connected to the metal housing; at least one second electrode tab (4, 13), arranged on the cell (9, 18) and electrically connected to the terminal (6, 15); and an insulating member (5, 14) disposed between the metal housing and the terminal (6, 15); wherein the insulating member (5, 14) is insulating and sealing the metal housing and the terminal (6, 15); a polarity of the at least one first electrode tab (10, 19) is opposite to that of the at least one second electrode tab (4, 13); a polarity of the metal housing is opposite to that of the terminal (6, 15); the metal housing and the terminal (6, 15) are sealing connected to the insulating member (5, 14) by means of heat or adhesion; characterized in that a first insulating layer (21, 22) is arranged between the second electrode tab (4, 13) and the metal housing; the metal housing comprises a metal shell (1, 12), and a cover plate (2, 11) disposed at a side of the metal shell (1, 12) and sealing connected to the metal shell (1, 12); the cell (9, 18) is received in the metal shell (1, 12); the at least one first electrode tab (10, 19) is electrically connected to the metal shell (1, 12) or the cover plate (2, 11); the terminal (6, 15) is disposed on an outer side of the metal shell (1, 12) or the cover plate (2, 11), and insulating and sealing the metal shell (1, 12) or the cover plate (2, 11) via the insulating member (5, 14); a safety vent (3, 20) is arranged on an inner or outer end surface of the metal shell (1, 12), the cover plate (2, 11) or the terminal (6, 15) to vent an internal overpressure; an injection hole (7, 16) is defined on a surface of the metal shell (1, 12) or the cover plate (2, 11); a cover sheet (8, 17) is arranged on an outside of the metal shell (1, 12) or the cover plate (2, 11) for sealing the injection hole (7, 16).