This standard establishes comprehensive technical specifications for lithium-ion batteries used in power energy storage, covering cells, modules, and battery clusters. It systematically defines core requirements such as basic performance, cycle life, and safety performance. Innovatively, the standard adopts a power-energy (W-Wh) evaluation system, placing equal emphasis on charging and discharging performance for comprehensive assessment. Through dozens of cumulative test items, it fundamentally ensures the safety and reliability of energy storage batteries. During the testing phase, a battery short-circuit tester is required to verify the anti-explosion capability of batteries under external short-circuit conditions. An adiabatic accelerating rate calorimeter is used to precisely determine the characteristic temperature of thermal runaway and the heat generation pattern. Additionally, a battery high-altitude low-pressure test chamber simulates safety performance under low-pressure environments. These rigorous testing methods collectively ensure that the batteries meet the urgent demands for high safety and long cycle life in practical power energy storage applications.