Battery monomer, battery and electric device

The utility model discloses a single battery, a battery and a power utilization device. The single battery comprises an electrode assembly, a first electrode and a second electrode, the shell is provided with a containing cavity used for containing the electrode assembly, the shell is provided with a plurality of pressure relief mechanisms, and each pressure relief mechanism comprises a weak part and a reinforcing part arranged on the weak part. According to the battery cell provided by the embodiment of the invention, the reliability can be improved, and the risk of pressure explosion is reduced. 本申请公开了一种电池单体、电池及用电装置，其中电池单体包括：电极组件；外壳，具有用于容纳所述电极组件的容纳腔，所述外壳设有多个泄压机构，各所述泄压机构包括薄弱部和设置于所述薄弱部的加强部。本申请实施例提供的电池单体能够提高可靠性、降低受压爆炸的风险。