Battery, power utilization system and energy storage system

The invention provides a battery, a power utilization system and an energy storage system. The battery provided by the invention comprises electrolyte, wherein the electrolyte comprises a nitrogen-containing heterocyclic ring additive and an annular sulfur-containing additive; at least part of the positive pole piece is soaked in the electrolyte, the positive pole piece comprises a positive current collector and a positive active layer, the positive active layer is arranged on the surface of the positive current collector, and the positive active layer comprises a positive active material and a carbon material; the diaphragm is positioned on one side of the positive pole piece and is at least partially soaked in the electrolyte; the negative pole piece is arranged on one side, away from the positive pole piece, of the diaphragm and is at least partially soaked in the electrolyte; wherein the battery meets the relational expression that alpha A/beta is larger than or equal to 0.136 wt% and smaller than or equa