Abstract: A CO2 gas-liquid phase transition-based multistage compression energy storage apparatus for converting thermal energy into mechanical energy, including: a gas storage; a liquid storage tank; an energy storage assembly, which includes compressors and energy storage heat exchangers; an energy release assembly (400), which includes energy release heat exchangers and expanders; a heat exchange assembly the energy generated by the energy storage assembly, and the energy release heat exchangers being capable of receiving the energy temporarily stored by the heat exchange assembly; and a driving assembly, which includes an energy input member and a first driving member, the energy input member absorbing external thermal energy to drive the first driving member to work, and the first driving member being used for driving the compressors to work.

Abstract: An energy storage device and method based on carbon dioxide gas-liquid phase change.

Abstract: An energy storage apparatus and method based on carbon dioxide gas-liquid phase change. The energy storage apparatus comprises a gas storage reservoir; a liquid storage tank; an energy storage assembly, provided between the gas storage reservoir and the liquid storage tank, wherein the energy storage assembly comprises a condenser and at least two compression energy storage parts, the compression energy storage parts each comprise a compressor and an energy storage heat exchanger; an energy release assembly, provided between the gas storage reservoir and the liquid storage tank, wherein the energy release assembly comprises an evaporator, an energy release cooler, and at least one expansion energy release part, the expansion energy release part comprises an expander and an energy release heat exchanger; and a heat exchange assembly, comprising a cool storage tank, a heat storage tank, and a heat recovery heat exchanger.

Abstract: A gas storage reservoir, an energy storage device, and a control method and a mounting method for the gas storage reservoir. An inner foundation structure surrounds the outer side of a ground film; an outer foundation structure surrounds the outer side of the inner foundation structure; the edge of an inner film is fixed to the inner foundation structure; an inner cable net is arranged on the outer surface of the inner film; an accommodating cavity is defined between the inner film and the ground film, and the inner film comprises a metal layer; an outer film structure covers the outside of the inner film structure; the outer film structure comprises an outer film and an outer cable net; an interlayer cavity is defined between the outer film and the inner film; an air supply device is configured to inflate the interlayer cavity.

Abstract: An electrode assembly, including a first electrode plate, a second electrode plate, and a separator. The separator is disposed between the first electrode plate and the second electrode plate. The electrode assembly further includes a first tab disposed on the first electrode plate, and a second tab and a third tab that are disposed on the second electrode plate. Projections of the first tab, the second tab, and the third tab on the first electrode plate do not overlap. The electrode assembly is provided with a multi-tab structure to achieve purposes of enhancing a current-carrying capacity of the battery and reducing a temperature rise.