Battery cell for electric vehicle battery pack

A method of providing a battery cell, comprising:

• providing a housing having an open end and a closed end, the housing defining a sidewall of the battery cell that extends between the open end of the housing and the closed end of the housing, the open end of the housing including an uneven rim pattern having a plurality of peak regions and a plurality of valley regions to define a plurality of tabs;
• providing a gasket inside the housing;
• performing at least one crimping operation on the housing to define a neck region of the housing to support a first polarity terminal of the battery cell and to cause the plurality of tabs to engage the gasket such that each tab defines a respective flat crimped area having a surface area between one square millimeter and five square millimeters extending in a direction perpendicular to the sidewall of the battery cell with a slope of less than 15 degrees to seal the housing to the gasket;
• and
• bonding a wire to the flat crimped area of at least one tab of the plurality tabs.

An electric vehicle, comprising:

• a battery pack installed in the electric vehicle;
• and
• a battery cell in the battery pack, comprising:
• a housing;
• a gasket;
• the housing defining a sidewall of the battery cell, the sidewall extending between an open end of the housing and a closed end of the housing;
• the open end of the housing including an uneven rim pattern having a plurality of peak regions and a plurality of valley regions to define a plurality of tabs;
• each of the plurality of tabs including a respective one of the plurality of peak regions, the peak regions to engage the gasket to seal the housing to the gasket;
• each of the plurality of tabs defining a respective flat crimped area extending in a direction perpendicular to the sidewall of the battery cell with a slope of less than 15 degrees, each flat crimped area having a surface area between one square millimeter and five square millimeters;
• and
• at least one of the flat crimped areas providing a surface to bond with a wire.