EVKG: An Interlinked and Interoperable Electric Vehicle Knowledge Graph for Smart Transportation System

TL;DR

The paper introduces EVKG, a comprehensive, interoperable knowledge graph for electric vehicles that integrates multiple data sources to support decision-making in EV technology, infrastructure, and policy development.

Contribution

It presents a novel, extensible EV-centric knowledge graph that integrates existing ontologies and enables interoperability within the Linked Data Open Cloud.

Findings

Demonstrates EVKG's ability to answer diverse EV-related questions

Shows EVKG's integration with other knowledge graphs enhances data richness

Validates EVKG's usefulness for decision-making in EV ecosystem

Abstract

Over the past decade, the electric vehicle industry has experienced unprecedented growth and diversification, resulting in a complex ecosystem. To effectively manage this multifaceted field, we present an EV-centric knowledge graph (EVKG) as a comprehensive, cross-domain, extensible, and open geospatial knowledge management system. The EVKG encapsulates essential EV-related knowledge, including EV adoption, electric vehicle supply equipment, and electricity transmission network, to support decision-making related to EV technology development, infrastructure planning, and policy-making by providing timely and accurate information and analysis. To enrich and contextualize the EVKG, we integrate the developed EV-relevant ontology modules from existing well-known knowledge graphs and ontologies. This integration enables interoperability with other knowledge graphs in the Linked Data Open Cloud, enhancing the EVKG's value as a knowledge hub for EV decision-making. Using six competency questions, we demonstrate how the EVKG can be used to answer various types of EV-related questions, providing critical insights into the EV ecosystem. Our EVKG provides an efficient and effective approach for managing the complex and diverse EV industry. By consolidating critical EV-related knowledge into a single, easily accessible resource, the EVKG supports decision-makers in making informed choices about EV technology development, infrastructure planning, and policy-making. As a flexible and extensible platform, the EVKG is capable of accommodating a wide range of data sources, enabling it to evolve alongside the rapidly changing EV landscape.