As one of the core components of new energy vehicles, power batteries have a great impact on the performance, safety, and lifespan of new energy vehicles. The level of technological development is crucial for the healthy and rapid development of the new energy vehicle industry. In 2021, the global sales of new energy vehicles will reach 6.5 million, with a year-on-year growth of 109%, of which 3.2 million will be sold in the Chinese Mainland market, accounting for half of the global sales of new energy vehicles. With the further increase in sales of new energy vehicles, the market size of power batteries will also expand, and higher requirements will be put forward for the energy density, safety, service life, and related comprehensive testing technologies of power batteries.