ENERGY STORAGE SYSTEM AND POWER SUPPLY SYSTEM

This application provides an energy storage system and a power supply system. The energy storage system includes N battery racks and at least two temperature control systems. Each battery rack includes a plurality of battery packs. Each battery rack can independently perform charging and discharging. The at least two temperature control systems are configured to control temperatures of the N battery racks. Two different temperature control systems in the at least two temperature control systems are configured to respectively control temperatures of two different battery racks of the plurality of battery racks. Herein, N is an integer greater than or equal to 2. In this embodiment, different temperature control systems are independently disposed. In this way, each independent temperature control system has a simpler structure, and can be conveniently replaced and maintained. A probability that the entire energy storage system cannot work can be reduced. When temperature control needs to be performed for a battery rack, only a corresponding temperature control system of the battery rack needs to be controlled to work. This helps reduce power consumption and reduce energy waste. When a temperature control system is faulty, a smaller quantity of battery racks are affected, thereby reducing losses.