Chinese plug-in hybrid vehicle industry

The Chinese plug-in hybrid vehicle industry and energy storage industry are achieving deep integration through 'battery homogeneity, vehicle network collaboration, and scene fusion'. BYD has directly transferred the blade battery technology used in PHEV models to the energy storage system. Its 14.5MWh 'Haohan' energy storage unit has become the world's largest single energy storage device with high energy density and low cost advantages, achieving seamless reuse of vehicle batteries for grid level energy storage. The equivalent energy storage capacity of a single NIO battery swapping station is 2MWh, combined with a photovoltaic storage charging swapping integrated station (such as the Jiaxing project), to build a zero carbon closed-loop system of 'photovoltaic power generation battery storage vehicle energy replenishment', transforming the battery swapping station from an energy consumer to a distributed energy storage node. The national 'Implementation Opinions on Strengthening the Integration and Interaction between New Energy Vehicles and the Power Grid' clearly states that PHEVs will be included in the mobile energy storage system. Nine cities including Shanghai and Shenzhen have launched V2G scale pilot projects. Car owners can discharge electricity to the power grid during peak hours through intelligent charging piles, and receive a reward of 5 yuan per kilowatt hour, achieving a two-way value flow of 'vehicle grid price'. By 2025, the retirement of PHEV power batteries in China is expected to exceed 20GWh, of which over 60% will enter the industrial and commercial energy storage and communication base station backup power scenarios, accelerating the formation of a hierarchical utilization system. The technological bottleneck still lies in the standardization of V2G communication protocols and precise assessment of battery health, but the concept of 'vehicle storage integration' has moved towards large-scale commercial practice.