Integrated On-Board Charger, Wireless Charging and Auxiliary Power Topologies for EVs: A Survey

Key findings from this study

• The review identifies that integrated charger architectures consolidate multiple power conversion functions into shared hardware, reducing redundancy and improving volumetric efficiency compared to independent systems.
• The authors report that integration strategies consistently involve trade-offs between efficiency, complexity, and physical size, with recent topologies progressively minimizing these compromises.
• The study establishes that emerging integrated topologies enable more compact and cost-effective EV designs while supporting diverse charging modalities including plug-in and wireless modes.

Overview

Integrated charging architectures for electric vehicles consolidate plug-in chargers, wireless chargers, and auxiliary power modules into unified hardware frameworks. This survey reviews recent integrated charger topologies designed to reduce system complexity, component count, and volumetric footprint while addressing trade-offs between efficiency, cost, and power density.

Methods and approach

The review examines recent integrated charging topologies for EV applications, analyzing system-level design insights and trade-offs. The authors assess emerging trends and technical challenges across multiple architectural configurations targeting improvements in power density, cost-effectiveness, and charging flexibility.

Results

Integrated architectures eliminate hardware redundancy through shared power conversion infrastructure. This consolidation improves volumetric efficiency and enables more compact vehicle designs. Integration strategies frequently involve explicit trade-offs between efficiency and system complexity or size, reflecting fundamental constraints in topology selection.

Implications

Integrated charger frameworks address critical limitations of distributed charging systems in modern EV platforms. Unifying multiple power conversion functions within common hardware reduces manufacturing complexity and material costs while supporting diverse charging modalities. This approach enables vehicle designers to achieve higher component density without proportional increases in system footprint or weight.

The surveyed topologies reveal that efficiency-size trade-offs represent persistent design challenges in integrated systems. Developers must balance charging speed, power factor correction capabilities, and thermal management against dimensional constraints. Emerging architectures progressively reduce these trade-offs through advanced circuit configurations and control strategies.

Integrated charging systems directly impact the feasibility of next-generation EV platforms with reduced overall weight and cost. The review identifies technical pathways for scaling these systems to higher power levels and multiple simultaneous charging modes. Future development should prioritize topologies enabling seamless mode transitions and improved reliability across diverse grid and wireless charging standards.

Scope and limitations

This summary is based on the study abstract and available metadata. It does not include a full analysis of the complete paper, supplementary materials, or underlying datasets unless explicitly stated. Findings should be interpreted in the context of the original publication.