End cap assembly, battery cell and manufacturing method thereof, battery, and electric apparatus

An electric apparatus, comprising:

• a battery cell configured to provide electric energy, the battery cell comprising:
• an electrode assembly;
• a housing;
• and
• an end cap assembly, comprising:
• an end cap configured to close the housing, an explosion-proof mechanism being provided at the end cap and being configured to be actuated to release an internal pressure of the battery cell in response to thermal runaway occurring in the battery cell;
• an adapting member configured to electrically connect the electrode assembly to an electrode terminal of the battery cell;
• an isolating component provided between the adapting member and the end cap, and configured to insulate the adapting member from the end cap;
• and
• a supporting member provided between the adapting member and the end cap;
• wherein:
• an orthographic projection of the adapting member on a first surface of the end cap at least partially overlaps an orthographic projection of the explosion-proof mechanism on the first surface of the end cap, the first surface being a surface of the end cap facing the housing;
• the orthographic projection of the adapting member on the first surface at least partially overlaps an orthographic projection of the supporting member on the first surface, to enable the supporting member to support the adapting member to prevent the adapting member from blocking the explosion-proof mechanism when thermal runaway occurs in the battery cell;
• at least a portion of the adapting member and at least a portion of the isolating component are separated from each other by a spacing along a direction perpendicular to the first surface;
• and
• the housing includes a hollow chamber with an opening, the electrode assembly is accommodated in the hollow chamber, and the end cap assembly covers the opening of the housing.

A battery cell manufacturing method, comprising:

• providing a housing, the housing including a hollow chamber with an opening;
• placing an electrode assembly into the hollow chamber of the housing;
• providing an end cap, the end cap being configured to close the housing of the battery cell, an explosion-proof mechanism being provided at the end cap and being configured to be actuated to release an internal pressure of the battery cell in response to thermal runaway occurring in the battery cell;
• providing an adapting member, the adapting member being configured to electrically connect the electrode assembly of the battery cell to an electrode terminal of the battery cell, an orthographic projection of the adapting member on a first surface of the end cap at least partially overlapping an orthographic projection of the explosion-proof mechanism on the first surface of the end cap, and the first surface being a surface of the end cap facing the housing;
• providing an isolating component between the adapting member and the end cap, the isolating component being configured to insulate the adapting member from the end cap, and at least a portion of the adapting member and at least a portion of the isolating component being separated from each other by a spacing along a direction perpendicular to the first surface;
• and
• providing a supporting member between the adapting member and the end cap, the orthographic projection of the adapting member on the first surface at least partially overlapping an orthographic projection of the supporting member on the first surface, to enable the supporting member to support the adapting member to prevent the adapting member from blocking the explosion-proof mechanism when thermal runaway occurs in the battery cell.