# NIT Rourkela Researchers Develop Hybrid Energy System to Significantly Extend EV Battery Lifespan

> A research team at NIT Rourkela has created and patented a hybrid power system combining batteries with supercapacitors, designed to buffer high-current shocks and enhance battery durability in urban EV driving conditions.

**Type:** article · **Category:** Auto · **Published:** 2026-09-03 · **Source:** TrendKia
**Canonical:** https://trendkia.com/en/auto/nit-rourkela-ke-shodhakartaon-ne-vikasita-ki-haibrida-pavara-takanika-ilektrika-vahanon-ki-baitari-umra-men-hoga-bara-ijapha-27161 · **Language:** English
**Tags:** Electric Vehicles, NIT Rourkela, EV Battery, Supercapacitor, Hybrid Energy Storage, Energy Management System, Patent

Amid the rapid adoption of electric mobility, maintaining battery efficiency and extending overall service life remains a paramount concern for automotive manufacturers and buyers alike. In congested city traffic, electric vehicles face continuous stop-and-go conditions, rapid acceleration spurts, and sudden braking events. These operating dynamics subject lithium-ion battery packs to severe electrical and thermal stress, accelerating cell degradation over time. Addressing this fundamental engineering challenge, researchers at the National Institute of Technology (NIT) Rourkela have engineered a novel hybrid energy storage architecture. By combining conventional batteries with fast-acting supercapacitors, the smart power system buffers peak electrical demands and protects battery cells from sudden current surges. The research team has also been granted a patent for this innovative energy management system.

## Understanding Battery Degradation in Urban Electric Vehicles
Urban driving represents one of the most demanding operational environments for electric vehicle powertrains. Unlike constant-speed highway cruising, city commuting requires vehicles to repeatedly halt and accelerate due to traffic signals, intersections, and heavy road congestion. When a driver presses the accelerator sharply, the electric motor demands an immediate surge of electrical current. Conversely, during sudden braking, regenerative braking systems channel a high-voltage power spike back toward the energy storage pack.

In standard electric vehicle designs, these abrupt current fluctuations are absorbed directly by the chemical battery cells. Repeated high-current charging and discharging cycles trigger localized thermal spikes and electrical strain within the cell chemistry. Over extended periods, this stress diminishes the usable capacity of the battery pack, causing range degradation and necessitating costly premature battery replacements. To mitigate these operational stresses, the NIT Rourkela engineering team designed an advanced Energy Management System (EMS) that shields the battery from sudden load spikes.

## Architectural Breakdown of the Smart Hybrid Power System
The primary technical breakthrough of the system developed at NIT Rourkela lies in the integration of supercapacitors alongside traditional chemical batteries. While standard batteries offer high energy density, they suffer from slow power delivery and suffer degradation when forced to supply or absorb sudden burst currents. In contrast, supercapacitors possess electrostatic energy storage mechanisms that allow them to charge and discharge at extremely high power rates almost instantaneously.

In this hybrid setup, the supercapacitor acts as an electrical buffer during high-demand events such as aggressive acceleration or abrupt regenerative braking. By taking on the immediate high-current spikes, the supercapacitor prevents transient power surges from reaching the main battery pack. Consequently, current is drawn from the battery at a smooth, controlled rate, virtually eliminating high-stress thermal events and substantially prolonging the operational lifespan of the EV battery pack.

## Key Components and Simplified Converter Engineering
The research team placed significant emphasis on keeping the hybrid energy storage system simple, robust, and cost-effective for practical automotive implementation. The overall design relies on three fundamental structural components

- **Single Converter Topology:** Conventional multi-source power systems usually require separate converters and complex multi-switch arrangements for each energy source. The NIT Rourkela design connects both the battery and the supercapacitor to the vehicle's electrical bus using a single converter. This eliminates redundant power electronic components, reducing structural complexity and manufacturing costs.
- **Power Inductor:** An inductor is integrated into the power line to regulate current transitions. It effectively dampens sharp current fluctuations and stabilizes power delivery across changing load conditions.
- **Unified Control Strategy:** The entire setup is governed by a singular control algorithm. This strategy monitors real-time driving demands and dynamically determines the power split between the battery and the supercapacitor without requiring multi-layered controller hardware.

## Performance Under Rapid Acceleration and Regenerative Braking
The operational mechanics of this hybrid system adapt seamlessly during real-world driving scenarios. When a driver accelerates rapidly, the vehicle motor demands an instant burst of high power. In conventional EVs, this current spike is drawn entirely from the chemical battery, causing thermal stress. In the hybrid architecture, the supercapacitor supplies the required surge power within milliseconds, ensuring the battery experiences only a steady, gradual load.

Similarly, when brakes are applied, the surge of electricity generated through regenerative braking is rapidly absorbed by the supercapacitor. Rather than forcing sudden high-current charging into the battery cells—which can overheat the pack—the supercapacitor buffers this incoming energy. The captured energy is subsequently reused during the next acceleration phase, enhancing overall vehicle energy efficiency alongside battery protection.

## 48V Test Validation and Low-Voltage EV Platform Scope
The NIT Rourkela team subjected the hybrid energy management system to rigorous experimental testing under simulated urban driving profiles. The test environment recreated scenarios involving abrupt stop-and-go motion, sharp velocity variations, and heavy braking inputs. Throughout these trials, the system maintained a remarkably steady output voltage of 48 volts while effectively suppressing severe fluctuations in battery current.

This innovative technology is tailored for low-voltage electric vehicle platforms operating within the 24V to 60V DC range. Given the rapid proliferation of light electric mobility in India, this development carries significant commercial relevance. It is particularly well suited for integration into electric two-wheelers, three-wheelers, e-rickshaws, and urban last-mile delivery fleets. The simplified component architecture makes it viable for commercial adoption by EV manufacturers seeking durable battery solutions.

## What this means for you
This patented hybrid energy storage system from NIT Rourkela represents a major step toward lowering electric vehicle maintenance expenses and extending battery pack longevity.

- **Across India:** Electric two-wheeler and three-wheeler owners could see significantly longer battery lifespans, delaying expensive battery pack replacements that typically occur every few years. Reduced long-term operating costs will boost adoption.
- **For Urban Drivers and Commercial Fleets:** E-rickshaws and last-mile delivery vehicles navigating frequent stop-and-go city traffic will experience reduced battery stress. Drivers benefit from more consistent daily performance and reduced cell degradation.
- **For EV Manufacturers:** The simplified single-converter architecture enables auto manufacturers to integrate this technology into existing production lines without substantial cost increases.

## Questions & Answers

### 1. What novel technology did NIT Rourkela develop for electric vehicles?
Researchers at NIT Rourkela engineered a patented hybrid energy storage system combining batteries and supercapacitors to buffer current shocks and extend battery life.

### 2. How does the hybrid system protect the battery in urban traffic?
During sudden acceleration or abrupt braking, the supercapacitor rapidly absorbs or supplies peak power, shielding the battery cells from thermal and electrical stress.

### 3. What are the core hardware components of this system?
The system features a single converter connecting the battery and supercapacitor, a power inductor for current smoothing, and a unified single control algorithm.

### 4. What output voltage was maintained during laboratory testing?
During rigorous testing across simulated urban driving cycles, the hybrid setup maintained a stable output voltage of 48 volts.

### 5. Which types of electric vehicles will benefit most from this innovation?
The technology is designed for low-voltage EV platforms operating between 24V and 60V DC, including electric two-wheelers, three-wheelers, and e-rickshaws.

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