Battery cell, battery, and electrical device

A battery, comprising:

• a battery cell including:
• a shell having a first wall, the first wall including a pressure relief mechanism;
• an electrode lead-out portion disposed on the shell;
• an electrode assembly disposed in the shell, the electrode assembly including a tab;
• an adapter member connecting the electrode lead-out portion to the tab;
• and
• a gap control portion disposed in the shell, the gap control portion configured to restrict the adapter member from shielding a pressure relief hole formed by the pressure relief mechanism in case of thermal runaway of the battery cell.

An electrical device, comprising:

• a battery having at least one battery cell, the at least one battery cell comprising:
• a shell having a first wall, the first wall including a pressure relief mechanism;
• an electrode lead-out portion disposed on the shell;
• an electrode assembly disposed in the shell, the electrode assembly including a tab;
• an adapter member connecting the electrode lead-out portion to the tab;
• and
• a gap control portion disposed in the shell, the gap control portion configured to restrict the adapter member from shielding a pressure relief hole formed by the pressure relief mechanism in case of thermal runaway of the battery cell.