Button-type lithium ion battery with metal housing

A button-type lithium ion battery, comprising:

• a metal housing (31), comprising a metal shell (12), and a cover plate (11) disposed at a side of the metal shell (12) and sealed to the metal shell (12);
• a cell (18), received in the metal shell (12);
• a terminal (15), disposed on an outside of the metal shell (12);
• at least one first electrode tab (19), arranged on the cell (18) and electrically connected to the cover plate (11);
• at least one second electrode tab (13), arranged on the cell (18) and electrically connected to the terminal (15);
• and
• an insulating member (14) disposed between the metal housing (31) and the terminal (15);
• wherein the insulating member (14) is insulating and sealing the metal housing (31) and the terminal (15);
• a polarity of the at least one first electrode tab (19) is opposite to that of the at least one second electrode tab (13);
• a polarity of the metal housing (31) is opposite to that of the terminal (15);
• the metal housing (31) and the terminal (15) are sealed to the insulating member (14) by means of heat or adhesion;
• wherein the terminal (15) is sealed to the metal shell (12) via the insulating member (14);
• wherein a first insulating layer (22) is arranged on a surface of the metal shell (12) opposite to the cover plate (11) and toward the cell (18);
• wherein an injection hole (16) is defined on a surface of the metal shell (12) and the surface faces the terminal (15);
• a cover sheet (17) is arranged on an outside of the metal shell (12) for sealing the injection hole (16);
• wherein a safety valve (20) is arranged on an inner surface of the cover sheet (17) to vent an internal overpressure.