Bidirectionalization and high-power development of on-board chargers (OBC) support the interaction ecology between ultra fast charging and vehicle network
Time：May 27,2026
In 2026, in vehicle chargers (OBCs) will enter a new stage of bi-directional, high-power, and integrated development, becoming the core hub for new energy vehicles to connect with ultra fast charging networks and build a vehicle to network interaction (V2G) ecosystem. OBC is responsible for converting AC power into usable DC power for power batteries. Currently, the industry focuses on the three major pain points of "faster charging, smaller size, and more functions", with intensive technological innovation to promote the dual upgrading of energy replenishment experience and energy value.
Power upgrade is the core mainline, and the 800V platform drives the OBC power to jump from the traditional 6kW-11kW to 22kW-43kW. Some high-end models are equipped with 60kW high-power OBC, achieving an ultra fast charging experience of "10 minutes of charging and 300 kilometers of range". Bidirectional transformation has become an inevitable trend, and bidirectional OBC can achieve AC/DC and DC/AC bidirectional conversion. It can not only take electricity from the grid for charging, but also reverse the power battery energy to the grid or external loads, supporting V2L (external power supply), V2H (household power supply), V2G (grid feeding) and other scenarios, upgrading vehicles from travel tools to mobile energy storage power stations.
Technological innovation focuses on two major areas: topology and power devices. Single level matrix topology design gradually replaces traditional two-level architecture, simplifies system complexity, increases power density by 40%, and reduces volume by 35%. The large-scale application of wide bandgap semiconductor devices such as SiC and gallium nitride (GaN) has increased switching frequency and reduced losses, resulting in OBC conversion efficiency exceeding 97% and standby power consumption dropping below 10W. At the same time, there is a significant trend towards integration, where OBC, DC/DC, PDU and other components are integrated into a multi in one power module that is suitable for the layout of the vehicle's high-voltage platform, reducing production costs and installation difficulties.
The market demand continues to be strong, with the domestic OBC market size reaching 12 billion yuan by 2025, a year-on-year increase of 25%, and the proportion of two-way OBC rapidly increasing. At the policy level, many regions have introduced V2G support policies to promote the application of two-way OBC vehicle loading. Users participating in vehicle network interaction can earn additional benefits, with a cumulative discharge income of over 8000 yuan in 3 years. In addition, OBC compatibility continues to be optimized, supporting a wide voltage input range of 200V-1000V, adapting to different global power grid standards and charging facilities, and supporting the global development of new energy vehicles.
keywords： Bidirectionalization and high-power development of on-board chargers (OBC) support the interaction ecology between ultra fast charging and vehicle network
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