Inside the Nexus EV: A Testbed for Hybrid Energy Storage
The Nexus EV, a converted second‑generation Myvi developed by Universiti Teknologi Malaysia (UTM) and NanoMalaysia under an xEV engineering programme with Perodua, is more than a one‑off science project. It is a live prototype for next generation EV powertrain ideas built around a Hybrid Electric Storage System (HESS). Instead of relying solely on a lithium‑ion pack, the car combines conventional batteries with a supercapacitor module. UTM’s goal is to show how EV supercapacitor technology can reduce stress on batteries, cutting peak current during hard acceleration and soaking up more energy during repeated stop‑start braking. The Nexus EV uses a 129 PS motor, a 26 kWh battery and claims a practical driving range of 250 km, with an 80% top‑up in about an hour. Researchers have also designed custom battery enclosures, thermal management and control software to orchestrate power flow between the two storage elements.
Supercapacitors vs Batteries: Power Sprinters, Not Marathon Runners
To understand where supercapacitors fit in electric car energy storage, it helps to compare them directly with lithium‑ion cells. Batteries store far more energy per kilogram, which is why they still underpin driving range in modern EVs. Supercapacitors, by contrast, offer much higher power density: they can deliver and absorb large bursts of power almost instantly, making them ideal for short spikes in demand. They also tolerate far more charge–discharge cycles with less degradation and are generally safer in terms of thermal runaway. The trade‑off is that supercapacitors hold far less total energy, so using them alone would slash range. In the Nexus EV, UTM’s hybrid battery supercapacitor setup lets the pack handle the “marathon” of range, while the supercapacitor manages the “sprints” of acceleration and regenerative braking. This division of labour is central to most realistic proposals for future EV supercapacitor technology.
Real-World Use Cases: From Peak Power Assist to Faster Charging
Where does this leave supercapacitors in real EVs? The most realistic role is as a supporting act rather than the star. In a next generation EV powertrain, supercapacitors can provide peak‑power assist during hard launches or highway overtakes, reducing the instantaneous load on the battery. They are also well suited to capturing fast bursts of regenerative braking energy that might otherwise be lost, especially in dense, stop‑start traffic. UTM notes that this smoothing of current spikes helps maintain power quality under high transient demands. Looking ahead, the team plans to explore fast‑charging protocols that lean on the supercapacitor module to buffer incoming power and shield the battery from extreme charge rates. That could enable quicker top‑ups without as much long‑term damage to the cells, even if supercapacitors never replace the main pack in electric car energy storage architectures.
Why Drivers Should Care: Lifespan, Range and Cost Down the Road
For drivers, the value of a hybrid battery supercapacitor system shows up in everyday concerns: how fast the car charges, how long the pack lasts and what it will be worth later. Perodua has repeatedly highlighted batteries as the biggest barrier to EV take‑up, citing cost, degradation and resale value, and even turned to a battery leasing scheme for its QV‑E model. By offloading violent power spikes to supercapacitors, a HESS can reduce the thermal and electrical strain that accelerates battery wear. Over time, this could allow automakers to fit slightly smaller, cheaper packs while maintaining usable range, or simply extend the lifespan of existing designs. Faster, more repeatable fast‑charging sessions should also be possible if the battery is better protected. While the Nexus EV’s boot‑full of hardware is not showroom‑ready, it hints at how future layouts could shrink into affordable, mass‑market solutions.
The Road Ahead: Slotting Supercapacitors into the EV Technology Map
Supercapacitors are not competing with lithium‑ion, LFP or solid‑state cells so much as complementing them in layered electric car energy storage systems. As research ramps up on higher‑density chemistries and safer solid‑state designs, engineers are also looking at power electronics and control algorithms that can orchestrate multiple storage devices seamlessly, just as UTM’s Nexus EV already does. Similar trends are visible in heavy industry, where high‑efficiency motors and advanced power electronics are deployed to cut energy losses, underscoring a broader push to squeeze more performance from every electron. For passenger EVs, the limiting factors remain supercapacitors’ low energy density, added system complexity and current cost. Yet if those hurdles fall, EV supercapacitor technology is well placed to become a standard building block: handling high‑power transients, enabling faster charging and quietly extending the life and value of the batteries drivers rely on.