Balance valve, battery and power consumption apparatus

A battery, comprising a box, a battery cell and a balance valve, wherein the battery cell is arranged in the box, and the balance valve is arranged on the box and comprises:

• a body, the body being provided with a ventilation channel;
• a breathable membrane, the breathable membrane being arranged at one end of the ventilation channel, and the breathable membrane being configured to maintain a gas circulation of the ventilation channel;
• and
• a gas barrier structure, the gas barrier structure being arranged at an other end of the ventilation channel, and the gas barrier structure being configured to close the ventilation channel when gas pressures inside and outside the gas barrier structure are balanced, while the gas barrier structure being configured to open the ventilation channel when the gas pressures inside and outside the gas barrier structure are unbalanced, so as to achieve a balance of the gas pressure inside and outside the gas barrier structure;
• wherein the body comprises a valve body and a valve core, the valve core is configured to be movably installed on the valve body, the ventilation channel is provided with the valve core, and the breathable membrane and the gas barrier structure are both fixed to the valve core.