The Tech

Proterra works with Michelin to develop low rolling resistance tire for e-buses

Proterra, a manufacturer of heavy-duty electric vehicles, is collaborating with Michelin to develop the MICHELIN X InCity Energy Z tire, a low rolling resistance tire designed and optimized for electric buses in urban environments. Proterra says the tire will be the standard tire offered for its Proterra Catalyst buses. Michelin designed the X InCity Energy… Read more »

ROHM introduces 1,200 V IGBTs for compressors and heater circuits

Electronic parts maker ROHM has announced four new automotive-grade 1,200 V-rated insulated-gate bipolar transistors (IGBTs) for inverters used in electronics compressors and for switching circuits used in positive temperature coefficient (PTC) heaters. The IGBTs feature a short-circuit resistance of 10 μsec (Tj=25° C). ROHM says the devices’ unique structure reduces VCE(sat) to 1.70 V, which… Read more »

Argonne’s new PEDOT cathode coating increases battery safety and stability

Scientists at the DOE’s Argonne National Lab have developed a new cathode coating by using an oxidative chemical vapor deposition technique that can help keep the cathode electrically and ionically conductive, ensure safety after many cycles, and help with other challenges as well. The findings are reported in the May online edition of Nature Energy…. Read more »

Essex creates high-temp winding insulation for EV motors that can withstand 265° C

Magnet wire manufacturer Essex, supplier of motor wiring for EVs like the Nissan LEAF, has introduced a high-temperature insulation for the windings of traction motors used in hybrids, PHEVs, and EVs. Essex’s EnduroTemp 260+ is a thin-film insulation with a 265° C thermal endurance. It’s designed to extend the life of traction motors by, in… Read more »

Fraunhofer develops GaN power ICs with integrated sensors

Researchers from the Fraunhofer Institute have integrated current and temperature sensors, 600 V-class power transistors, freewheeling diodes, and gate drivers onto a gallium nitride (GaN)-based semiconductor chip. The new circuit measures 4 x 3 mm and enables high switching frequencies and a high power density, while providing fast and accurate condition monitoring, according to the… Read more »

DOE holds lithium-ion battery recycling competition

The DOE is sponsoring a competition to encourage the development of a process to recycle 90 percent of the content of lithium-ion batteries. The $5.5-million Lithium-Ion Battery Recycling Prize, which launched earlier this year, is split into three phases. Phase I: Conceptual Development and Incubation – Applicants submit a plan to collect, sort, separate, store,… Read more »

Maxwell’s Teflon-fibrilizing electrode process could save Tesla big bucks on battery manufacture

Tesla has completed the acquisition of Maxwell Technologies, a company that’s known for its pioneering work with supercapacitors. However, Electrek’s Fred Lambert and others have noted that Tesla’s interest in Maxwell probably has less to do with supercapacitors than with the company’s “dry electrode” technology. Randy Carlson, in an article posted on Seeking Alpha, provides… Read more »

Elaphe begins production of new in-wheel hub motor

In-wheel electric motor manufacturer Elaphe Propulsion Technologies will begin low-volume production of the L1500, a new gearless in-wheel powertrain system, in the fourth quarter of 2019. The system features high torque, low weight, and a compact packaging fitted around standard knuckles and friction braking systems. The L1500 generates 1.500 Nm of torque and 110 kW… Read more »

24M surpasses 250 Wh/kg on the road to 400+

Battery company 24M has announced that it has developed commercially viable Nickel Manganese Cobalt (NMC) cells with an energy density above 250 Wh/kg. The company has also delivered similar NMC cells with an energy density above 280 Wh/kg to an industrial partner. 24M’s new NMC cells were built with the company’s SemiSolid lithium-ion battery design,… Read more »