Pressure relief element, pressure relief device and battery

A pressure relief device of a battery, the pressure relief device comprising:

• a first base having an opening;
• a pressure relief disk disposed in the opening of the first base, the pressure relief disk being replaceable, having a thickness and comprising:
• a raised central portion;
• a raised outer portion having a second base;
• a first side;
• and
• a second side, opposite the first side, the thickness of the pressure relief disk decreasing from the raised central portion to the second base of the raised outer portion, the second side comprising a notch that defines a predetermined breaking point between the raised central portion and the raised outer portion of the pressure relief disk;
• and
• a cap being releasably coupled to the first base and sealing the pressure relief disk against the first base.