Chinese Company Hunan Tyen Unveils Its Power Turbine Generator: A Compact, Removable Module That Increases EV Range

      Chinese auto company Hunan Tyen, a subsidiary of Changan, has developed a detachable Power Turbine Generator (PTG), which can address range anxiety for EV owners. EV range is affected by cold weather, high-speed energy consumption, and charging convenience. The  PTG  was designed as a modular auxiliary power system, a fuel-to-electricity method of supplementing available energy.

     According to Car News China:

“Hunan Tyen’s PTG system boasts several advantages, including a more compact structure, higher power density, and stronger fuel adaptability. For the key gas turbine component, the company leveraged its fluid machinery design expertise alongside three-dimensional turbulence numerical simulation to analyse the internal flow fields of the compressor and turbine. Simultaneously, they innovatively developed a high-efficiency ball bearing system, an efficient vaned compressor, and a fixed-guide vane turbine, ultimately boosting turbine efficiency by over 5%.”

“The electronic control unit, serving as the control core of the system, faces thermal load challenges under high power density operation. To achieve coordination with the vehicle system, high-efficiency cooling channel structures were designed, combined with precision thermal management strategies based on thermal flow field simulation, solving stability issues under high-temperature conditions.”

     The detachable and drop-in device can turn a battery electric vehicle (BEV) into an extended-range electric vehicle (EREV). Previously, some Tesla owners had fitted range extenders on their vehicles, but the new PTG is a better design, which focuses on efficiency, compactness, and adaptability.

     The PTG features a fixed-guide vaned turbine, an efficient vaned compressor, and a refined bearing assembly. It is also equipped with thermal management, mainly for cooling. It also features a more compact structure, higher power density, and stronger fuel adaptability.

     While the PTG is made for long EV trips requiring extended range, it can also be used in other applications, such as unmanned aerial systems and portable power supply equipment. It can also reduce reliance on very large, very heavy, and very expensive battery packs.

     According to Interesting Engineering:

“Because it operates independently of the main electric powertrain and can be used selectively, it could appeal to drivers who face significant range anxiety or limited charging networks, especially in regions where fast-charging infrastructure is still developing.”

     Hunan Tyen optimized turbine airflow using 3D turbulence simulations, resulting in the 5% performance improvement. The PTG can be “bolted on” for long trips and removed when not needed. Of course, one day, when EV batteries become more efficient and natural range climbs higher, such detachable range extenders likely won’t be needed. However, at present, they can be very useful.

References:

 

Changan Auto subsidiary unveils detachable power turbine generator to transform BEVs into EREVs. CarNewsChina.com. February 27, 2026. Changan Auto subsidiary unveils detachable power turbine generator to transform BEVs into EREVs

China’s detachable power generator for pure electric cars could end EV range anxiety. Prabhat Ranjan Mishra. Interesting Engineering. February 27, 2026. China’s detachable power generator for pure electric cars could end EV range anxiety