Battery, battery pack and electric equipment

A battery pack, comprising a battery,

• wherein the battery comprises:
• a shell having an inner cavity;
• a wound core assembled in the inner cavity of the shell;
• a column supported in the wound core to prevent the wound core from collapsing, wherein the column comprises a first cavity configured to store a lithium-replenishing medium and a second cavity configured to store a fire-fighting medium, a cavity wall of the first cavity having a first hole, and a cavity wall of the second cavity having a second hole;
• a first membrane configured to block the first hole, the first membrane being configured to break when subjected to a first pressure, allowing the lithium-replenishing medium in the first cavity to flow into the inner cavity through the first hole;
• and
• a second membrane configured to block the second hole, the second membrane being configured to break when subjected to a second pressure, allowing the fire-fighting medium in the second cavity to flow into the inner cavity through the second hole, wherein the second pressure is greater than the first pressure.

Electric equipment, comprising a battery or comprising a battery pack having the battery,

• wherein the battery comprises:
• a shell having an inner cavity;
• a wound core assembled in the inner cavity of the shell;
• a column supported in the wound core to prevent the wound core from collapsing, wherein the column comprises a first cavity configured to store a lithium-replenishing medium and a second cavity configured to store a fire-fighting medium, a cavity wall of the first cavity having a first hole, and a cavity wall of the second cavity having a second hole;
• a first membrane configured to block the first hole, the first membrane being configured to break when subjected to a first pressure, allowing the lithium-replenishing medium in the first cavity to flow into the inner cavity through the first hole;
• and
• a second membrane configured to block the second hole, the second membrane being configured to break when subjected to a second pressure, allowing the fire-fighting medium in the second cavity to flow into the inner cavity through the second hole, wherein the second pressure is greater than the first pressure.