This application provides an energy storagesystem, including: a housing; an energy storage device housed within the housing; and a voltage limiting device, wherein a first terminal of the voltage limiting device is electrically connected to the energy storage device, and a second terminal of the voltage limiting device is electrically connected to the housing or a conductive device within the housing. This system can limit overvoltage within the energy storage device's housing while reducing the risk of thermal runaway in the energy storage system.