Reference Design Of A Bi-directional Converter For EV Charging



E-mobility is evolving with a 97.2% environment friendly, compact 11 kW SiC bi-directional DC/DC converter design for EV charging and power storage methods.

EV charger

E-mobility is quickly remodeling each personal and public transportation, lowering air air pollution and enhancing our planet’s livability. Moreover, power storage methods provide the potential to preserve power by optimising its distribution. Infineon Applied sciences has launched the reference design of an 11 kW SiC bi-directional DC/DC converter board for Electrical Car (EV) Charging and Power Storage System (ESS) purposes. The REF-DAB11KIZSICSYS board is designed to supply an answer for bi-directional DC-DC converters, facilitating speedy and distinctive bi-directional charger designs for patrons. The 2 inductors and two capacitors (CLLC) resonant DC-DC converter boasts bi-directional power move and soft-switching options, making it optimum for each on-board and off-board chargers and power storage methods (ESS). 

The reference design encompasses a completely fleshed-out and characterised {hardware} and software program answer complemented by an intuitive graphical person interface (GUI). It ensures seamless integration of CoolSiC MOSFETs with Infineon’s driver IC, XMC controller, flyback controller, voltage regulator MOSFETs, present sensor, and Cypress reminiscence, together with a safety & security chip. The design incorporates a CLLC in a full-bridge setup. The CLLC resonant converter is favoured as a DC transformer connecting the AC/DC to the DC bus resulting from its excessive energy density and bi-directional energy switch functionality. In each ahead and reverse modes, the resonant tank mirrors the operational traits of the normal LLC resonant tank. Consequently, gentle switching with each Zero Voltage Switching (ZVS) and Zero Present Switching (ZCS) may be attained in each instructions, lowering switching losses and enhancing charger effectivity.

The design achieves a excessive effectivity, persistently hitting or exceeding 97.2%. With a excessive energy density of 4.1 kW/l, it incorporates synchronous rectification and is supplied with 1200 V and 1700 V MOSFETs. This makes it the right DC-DC converter for DC EV charging wall containers and power storage methods. It permits engaging enterprise fashions like Car-to-Grid (V2G) and Car-to-Constructing (V2B) for end-users and ensures minimal losses throughout any charging and discharging cycle. Its compact measurement and diminished weight facilitate simple set up and boast a low value per kW on the system stage. The board measures 360 mm x 160 mm x 65 mm, translating to an influence density approximating 3 W/cm³ (or 5.5 W/g). The commercial-qualified design is tailor-made for chargers starting from 30 kW to 150 kW and energy conversion methods. Its major goal purposes embrace EV charging, power storage, and medical units.

Infineon Applied sciences has examined this reference design. It comes with a Invoice of Supplies (BOM), schematics, Printed circuit board (PCB) structure, and so forth. You will discover extra information in regards to the reference design on the corporate’s web site. To learn extra about this reference design, click on right here.


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