SemiQ Sees SiC Traction in EV Battery Cell Cyclers

SemiQ, a company based in the US, has begun shipping its silicon carbide (SiC) MOSFET modules designed for high power cell cycling systems utilized by some of the top battery manufacturers globally. These cell cyclers are crucial for establishing a stable solid electrolyte interphase, which in turn enhances the longevity and performance of batteries. Additionally, the systems facilitate battery degradation analysis, temperature and stress testing, as well as defect and performance issue checks.

One of the key requirements for these cyclers is the precise charging and discharging of batteries at high switching frequencies to ensure accurate control of current and voltage, thereby preventing damage from overcharging or discharging. Consequently, the MOSFETs must be able to endure the thermal stress resulting from repeated power cycling, as any failures could disrupt testing procedures and lead to inaccurate data. Moreover, conversion efficiency is a critical factor in reducing the operational costs of the factory.

SemiQ is providing its GCMX003A120S3B1-N and GCMX003A120S7B1 QSiC 1200 V SiC half-bridge modules for deployment in 100 kW cyclers featuring ten 10kW cells connected in parallel. The 1200V SiC module now includes an S7 option, while the company also offers 1700V SiC MOSFETs in bare die and module configurations.

These SiC MOSFET modules are equipped with a dependable body diode and have undergone testing at voltages exceeding 1350 V. They boast a robust design that facilitates easy mounting. Each 10kW cell will incorporate 12 modules, resulting in a total of 120 modules per 100 kW cycler.

Dr. Timothy Han, President at SemiQ, expressed enthusiasm about the partnership with a leading cell cycler, emphasizing the significance of evaluating battery performance, durability, and efficiency in advancing the development of EV batteries with extended range and lifespan. He stated, “Reports indicate that the electrification of transportation is a crucial step towards achieving net-zero emissions. We are pleased to collaborate with a prominent player in the industry, underscoring the resilience and efficiency of our SiC technology.”