EV Components Suppliers
Electric vehicle components including BMS, battery pack shielding, and charging components for EV applications.
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Frequently Asked Questions
What does a battery management system (BMS) do?
A BMS monitors and manages rechargeable battery packs by tracking cell voltage, temperature, and state of charge for every cell in the pack. It performs cell balancing to equalize charge levels, protects against overcharge/overdischarge, estimates remaining range, and communicates battery status to the vehicle control system. A BMS is critical for safety, performance, and battery longevity.
Why does an EV battery pack need EMI shielding?
EV battery packs contain high-power switching electronics (BMS, contactors, pre-charge circuits) that generate conducted and radiated EMI. Without proper shielding, this interference can affect vehicle ADAS sensors, infotainment systems, and wireless communications. The battery enclosure also needs RF sealing at joints and cable entry points to meet CISPR 25 emissions limits.
What components are used in EV charging systems?
Key charging components include onboard chargers (AC-DC conversion, typically 7-22 kW), DC-DC converters (high-voltage to 12V auxiliary), charging inlets (CCS, CHAdeMO, or NACS), contactors and relays for high-voltage switching, and power electronics modules. Each component requires appropriate EMI filtering and thermal management.
How are EV component suppliers qualified?
EV component suppliers typically undergo IATF 16949 certification audits, provide PPAP (Production Part Approval Process) documentation, and pass component-level testing per AEC-Q standards. OEMs also require product-specific validation including thermal cycling, vibration, EMC testing, and often 10+ year reliability demonstration.