Electric Vehicles (EV)
A comprehensive portfolio of AEC-Q200 approved high-voltage MLCCs, Tandem and Open Mode MLCCs, X8R high-temperature MLCCs, and EMI filters engineered for EV applications.
The Knowles Advantage
Knowles provides critical passive components that enable EV power electronics to perform flawlessly. Our portfolio includes AEC-Q200 qualified multilayer ceramic capacitors (MLCCs), high-voltage safety-certified capacitors, and custom DC link solutions optimized for traction inverters, onboard chargers, and fast-charging infrastructure. With advanced designs offering high capacitance, low inductance, and extended life up to 200,000 hours, Knowles ensures efficiency, EMI compliance, and long-term reliability for every stage of EV power conversion.
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Knowles’ components for EVs can be found in:
- Traction Inverters - Converts battery DC power into AC for the motor, enabling efficient propulsion with high-frequency switching and EMI management.
- Onboard Chargers (OBC) - Transforms AC grid power into DC for battery charging, incorporating power factor correction and EMI filtering for safe, efficient operation.
- DC/DC Converters - Provides multiple voltage rails for auxiliary systems and control electronics, ensuring stable performance across wide temperature and load ranges.
- Battery Management System (BMS) - Monitors and controls battery health, voltage, and temperature, enhancing safety and extending battery life through precision electronics.
- Wireless Charging - Delivers cable-free energy transfer using resonant circuits for convenience and optimized energy coupling between ground and vehicle coils.
Powering the Future of Electric Mobility
Driving EV Performance with Safety, Efficiency, and Reliability
Knowles delivers advanced component solutions that enable safer, faster, and more efficient EVs.
- Automotive-Grade Reliability: AEC-Q200 qualified MLCCs ensure high-voltage stability up to 4kV for traction systems, battery management, and OBCs.
- High-Efficiency Power Conversion: Knowles’ DC link capacitors provide ultra-fast Level 3 charging capability with voltage ranges from 450V to 3800V for maximum performance and durability.
- Thermal and Safety Assurance: X8R high-temperature MLCCs rated to 150°C and safety-certified capacitors deliver dependable operation in harsh automotive environments.
- Noise-Free Power Systems: Integrated EMI suppression solutions protect sensitive electronics from interference and voltage spikes, ensuring compliance and system integrity.
- Wireless Charging Expertise: Precision resonant capacitors enable efficient energy transfer for practical, reliable cable-free EV charging.
Educational Resources
Blogs
Catalogs
Whitepapers
Videos
The Evolution of Electric Vehicle Battery Management Systems: From Passive to Active Cell Balancing
As electric vehicle (EV) manufacturers work to make batteries more affordable and easier to produce in mass quantities, we’re seeing changes in battery chemistry.
Looking Closer at Snubber Capacitors in Electric Vehicles
In a previous article about electric vehicles (EV), we talked about using DC link capacitors as an intermediary buffer in power converters.
Overcoming EMI in Electric Vehicle Applications
According to the U.S. Bureau of Transportation Statistics, electric vehicle (EV) sales in the U.S. reached record high monthly volume in March 2021 and continued to rise, nearly doubling in 2021.
The Roles of Capacitors in EV Traction Inverter Topologies
The power electronic systems in an electric vehicle (EV) feature a wide variety of capacitors.
Exploring the Capacitor Technologies Needed in Electric Vehicles
The electrical power systems in most modern technologies, like electric vehicles (EVs), are complex. In EVs specifically, power systems are responsible for performing many tasks such as converting AC to DC and DC to AC as well as managing changing power levels in DC/DC conversion.
Examining the Latest Electric Vehicle Technology Trends
The market demands and technology trends that impact all aspects of electric vehicle (EV) development are constantly evolving.
AEC-Q200: Automotive Grade Capacitor Catalog
Automotive‑grade passive components qualified to AEC‑Q200 standards.
Making EV Wireless Charging Systems a Reality
Explore the emerging role of wireless EV charging, its technical challenges, and how resonant capacitors can improve power t...
How to Size a Snubber Capacitor for Your Power Supply
Basic snubber derivation for a simple switching circuit.
Considerations for Selecting Automotive-Grade Capacitors for EVs
Learn How to Select the Right Automotive-Grade Ceramic Capacitor for Your EV Applications
Knowles Safety Capacitors
A broad portfolio of safety-certified capacitors designed to protect people and equipment, even in demanding applications.
Ensure the Reliability of Your EV Electronic System with Knowles
EV OEMs need high-reliability electronic components optimized to withstand the higher voltage, temperature, and power requir...
Supporting World-Wide Electric Vehicle Innovation
As EV adoption accelerates, Knowles supports next‑generation vehicles and charging infrastructure with AEC‑Q200‑qualified, h...
Product Documentation
Capacitors for EV Applications
Automotive-grade capacitors enable efficient, reliable power management for next-generation electric vehicles.
Custom DC Link Capacitors
Custom DC link and filtering capacitors deliver high ripple current performance, low inductance, and proven reliability.
Capacitors for EV DC Fast Chargers
Powering the future of EV charging with efficient, reliable components for ultra-fast charging systems.
EV Charging Levels
EV charging spans Levels 1 and 2, DC fast charging, wireless charging, and bi-directional charging.
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