Electrochemical device and electronic device

An electronic device comprising an electrochemical device;

• wherein the electrochemical device comprises a housing, an electrode assembly, and a tab;
• wherein,
• the housing comprises a body portion and a first portion, the electrode assembly is disposed in the body portion, and the tab is electrically connected to the electrode assembly and protrudes out of the housing in a first direction;
• a thickness direction of the electrode assembly is a second direction, and a direction perpendicular to the first direction and the second direction is a third direction;
• wherein in the second direction, the body portion comprises a first wall and a second wall disposed opposite to each other, and in the third direction, the body portion comprises a first sidewall and a second sidewall disposed opposite to each other;
• the first portion comprises a first seal edge and a second seal edge, the first seal edge is connected to the first sidewall and the second wall, the second seal edge is connected to the first seal edge, and the second seal edge is disposed between the first seal edge and the first sidewall;
• the housing comprises a first housing part and a second housing part disposed opposite to each other,
• the first housing part comprises a first polymer layer and a first metal layer, the second housing part comprises a second polymer layer and a second metal layer, the first polymer layer and the second polymer layer are bonded to form a glue layer, and the glue layer is located in the first portion;
• and
• in a cross-section perpendicular to the first direction, a first connection point is provided between the first seal edge and the first sidewall,
• the first sidewall extends outward from the first connection point along an outline of the first sidewall to form a first straight line, and the glue layer is located in a space defined by the first portion and the first straight line,
• wherein the first seal edge comprises a first region, a second region, and a third region;
• the second region is connected between the first region and the second seal edge, and the first region is connected between the second region and the third region;
• a thickness of the first region is greater than a thickness of the second region;
• the first polymer layer in the third region is not bonded to the second polymer layer;
• in the cross-section perpendicular to the first direction, the glue layer in the first region comprises an angular point, and the angular point protrudes toward the third region;
• a third straight line is defined parallel to a second straight line passing through the first connection point and extending along the second direction, the third straight line passes through the angular point and intersects a boundary line between the first metal layer of the first seal edge and the first polymer layer to form a first intersection;
• the third straight line intersects a boundary line between the second metal layer of the first seal edge and the second polymer layer to form a second intersection;
• and
• a distance from the first intersection to the second intersection is L3, a distance from the angular point to a boundary line between the first region and the second region is L4, and 0.1≤L3/L4≤0.6.