Battery monomer, battery and electric device

The invention discloses a battery monomer, a battery and a power utilization device. The single battery comprises a shell, an electrode assembly, a detection assembly and a protection assembly, the shell is provided with a containing cavity, the electrode assembly is contained in the containing cavity, the detection assembly is connected to the shell and used for detecting the working state of the single battery, and the protection assembly protrudes out of the shell and is arranged on the same side with the detection assembly so as to protect the detection assembly. According to the embodiment of the invention, the safety and reliability of the battery monomer can be effectively improved.