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All About Electric Vehicle Parts: What You Need to Know

All About Electric Vehicle Parts: What You Need to Know
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Electric vehicles consist of several essential components for their smooth operation. These parts create a sustainable and efficient mode of transportation. The range of parts and their functions involved in making an electric vehicle run efficiently demonstrate how far technology has advanced. This blog aims to explore the world of electric vehicle parts and functions, and uncover the building blocks that make electric cars go vroom!

Table of Contents:

Learn more about electric vehicles by watching this introductory video:

What is an Electric Vehicle?

What is an Electric Vehicle

Electric vehicles represent the future of transportation. Unlike traditional cars that run on petrol or diesel, EVs are powered by electricity. This electricity can be sourced from renewable resources, making EVs a more environmentally friendly option. 
With zero tailpipe emissions, electric vehicles play a crucial role in reducing air pollution and combating climate change. As battery technology advances, EVs are becoming more affordable and accessible, paving the way for a greener future on our roads.

Electric vehicles are categorized into four different types. Following are the various types of EVs:

Battery Electric Vehicles (BEVs): These cars run on a battery that you charge from an outside power source.
Hybrid Electric Vehicles (HEVs): These vehicles have both a regular engine and an electric motor with a battery. They work together to make the car go.
Plug-in Hybrid Electric Vehicles (PHEVs): These cars also have a battery that can be charged from an outside source, along with a gasoline engine.
Fuel Cell Electric Vehicles (FCEVs): These use special cells that turn hydrogen fuel into electricity. This electricity then powers the car’s electric motor.

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Parts of an Electric Vehicle and Its Functions

The transition to electric vehicles, a greener and more sustainable means of transportation, is enabled by the advancement of various interconnected components. Each of these plays a crucial role in ensuring the electric vehicle’s overall function and performance.

Parts of an Electric Vehicle

Following are an electric car’s significant parts and their respective functions:


Battery Functions

The battery is the heart of an electric vehicle (EV), as it stores electrical energy in chemical form. It typically consists of lithium-ion cells connected in series and parallel configurations. Modern EV batteries are designed for high energy density, long life, and fast charging. Each battery that is manufactured is backed by a warranty that lasts for a minimum of eight years or up to 200,000 miles.


Here we will discuss some of the functions of batteries:

  • Energy Storage: The battery serves as a reservoir of electrical energy, allowing the electric vehicle to store power for later use and enabling sustained propulsion over varying distances.
  • Regenerative Braking: The battery system captures and stores energy generated during braking, converting kinetic energy into electrical energy and increasing overall efficiency by reusing what would otherwise be lost.
  • Power Delivery: The battery rapidly releases stored energy to the electric motor, providing the necessary high-power bursts for quick acceleration and responsive driving performance.

DC Cables

DC Cables Functions

Direct Current (DC) cables facilitate the flow of electricity between the battery and other components. They transmit high-voltage power from the battery to the power inverter, minimizing energy losses and ensuring efficient power delivery.
Presently, the enhanced version of the EV DC Connection cable has a better DC Voltage rating of 1.8/1.8 (1.8) kV Uo/U (Um) and a 9.6 kV DC Test Voltage. This upgrade perfectly caters to the needs of high-powered rapid charging equipment.


Below are a few functionalities of DC Cables:

  • Efficient Power Transfer: DC cables ensure minimal energy loss during the transmission of high-voltage power between the battery, power electronics, and electric motor, maintaining the vehicle’s energy efficiency.
  • High Current Handling: These cables are designed to handle the substantial current flow required by the electric motor, maintaining a steady and reliable power supply for optimal performance.
  • Heat Dissipation: DC cables are engineered to dissipate heat effectively, preventing overheating during high-power operations and ensuring safe and reliable power transmission.

Electric Motor

Electric Motor Functions

The electric motor is a fundamental component of an electric vehicle (EV), responsible for converting electrical energy from the battery into mechanical energy that propels the vehicle. Its primary function is to generate rotational motion and torque to drive the wheels, enabling the vehicle to move.
There are various types of electric motors used in EVs, such as DC motors, AC induction motors, and permanent magnet synchronous motors (PMSM).


There are several functions of electric motors that you should consider. They are:

  • Propulsion and Torque Generation: The electric motor converts electrical energy into rotational motion, generating torque to propel the vehicle and provide smooth, instantaneous acceleration.
  • Energy Efficiency: Electric motors offer high efficiency across a broad range of speeds, minimizing energy waste and extending the vehicle’s overall range on a single charge.
  • Regenerative Braking: The electric motor reverses its function during braking, acting as a generator to convert kinetic energy back into electrical energy, which is then stored in the battery.

AC Cables

AC Cables Functions

Alternating Current (AC) cables are the conductive lifelines between the power inverter and the electric drive unit. They enable the conversion of AC power from the grid into DC power for battery charging.


Following are a few functions of AC Cables:

  • Charging Interface: AC cables provide a connection between the electric vehicle and external charging stations or power outlets, enabling convenient and safe charging of the battery.
  • Voltage Conversion: AC cables may incorporate components that convert grid AC voltage to a suitable level for charging the EV’s battery, ensuring compatibility and proper charging.
  • Safety Measures: These cables are equipped with safety features such as grounding and insulation to prevent electrical accidents and ensure secure charging operations.

Power Inverter

Power Inverter Functions

The power inverter converts DC power from the battery into AC power to drive the electric motor. It plays a vital role in regulating motor speed and torque, contributing to efficient energy utilization and responsive performance.


The various functions of a power inverter are the following:

  • DC to AC Conversion: The power inverter’s primary function is to convert the direct current (DC) supplied by the battery into the alternating current (AC) required by the electric motor, enabling efficient motor operation.
  • Voltage Regulation: The power inverter maintains precise control over the amplitude and frequency of the AC output, allowing for accurate modulation of the electric motor’s speed and torque.
  • Thermal Management: Power inverters often include cooling systems to manage heat generated during the conversion process, ensuring the inverter’s reliability and longevity.

Electric Drive Unit

Electric Drive Unit Functions

The electric drive unit encompasses the electric motor, power electronics, and sometimes the gearbox. It transforms electrical energy from the battery into mechanical energy that drives the wheels. Its compact design and high efficiency are key factors in the overall performance of the vehicle.


Some of the functions of an electric drive unit include the following:

  • Power Transmission: The electric drive unit transfers the rotational energy generated by the electric motor to the vehicle’s wheels, translating it into forward or reverse motion.
  • Torque Distribution: This component ensures a balanced and controlled distribution of torque to the wheels, optimizing traction and stability under varying driving conditions.
  • Gear Ratio Adaptation: In EVs with multiple gears, the drive unit adjusts gear ratios based on driving conditions, optimizing efficiency and performance.

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Half-Shafts Functions

Half-shafts, also called drive shafts, are essential components responsible for transmitting torque from the electric drive unit to the wheels. It plays a significant role in ensuring smooth and efficient power delivery, enhancing the driving experience.


Here are a few functions of half-shafts:

  • Torque Transmission: Half-shafts evenly distribute torque from the drive unit to the wheels, maintaining consistent and controlled acceleration while preventing wheel spin.
  • Suspension Compatibility: These components accommodate the vertical movement of the wheels due to road irregularities, ensuring seamless power delivery even when the suspension is in motion.
  • Mechanical Redundancy: In some designs, the presence of multiple half-shafts can provide redundancy, enhancing vehicle reliability in the event of a mechanical failure.

Auxiliary Battery

Auxiliary Battery Functions

The auxiliary battery in an electric vehicle is a secondary battery separate from the main traction battery. Its primary function is to power various auxiliary systems and components in the vehicle, ensuring their operation even when the main battery is not actively supplying power. The auxiliary battery is typically smaller and lighter compared to the main battery pack used for propulsion.


Below are the functions of auxiliary batteries:

  • Auxiliary Power Supply: The auxiliary battery delivers electrical energy to power various non-propulsion systems, such as lighting, infotainment, and climate control, enhancing passenger comfort and convenience.
  • Standby Power Source: In case of a main battery failure, the auxiliary battery acts as a backup power source for essential systems, ensuring critical functions remain operational and maintaining safety.
  • Energy Management: The auxiliary battery system may be integrated with the vehicle’s energy management system, optimizing its usage to extend overall battery life and enhance efficiency.

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Top Electric Vehicle Parts Supplier in India

The top manufacturers of electric vehicle parts in India are leading the way in the evolution of transportation with their latest innovations and creative technologies. 

Below, we list some of the renowned suppliers of EV:

  • Panasonic: A top provider of electric vehicle batteries, Panasonic is a Japanese company. The company has a strong presence in India and provides batteries to a number of domestic producers of electric vehicles, including Tata Motors, Mahindra Electric, and Ashok Leyland.
  • Amara Raja Batteries: Amara Raja Batteries is an Indian multinational battery manufacturing company. The company is a major supplier of lead-acid batteries for automobiles and is also expanding its production of lithium-ion batteries for electric vehicles.
  • Tata AutoComp- In India, Tata AutoComp holds a prominent position as a leading provider of car components. Their offerings encompass an array of items such as power electronics, inverters, motors, and various other essential parts tailored for electric vehicles.
  • Exide Industries- A significant player within India, Exide Industries stands as a major Indian corporation engaged in battery production. Renowned for its expertise in crafting batteries for conventional automobiles, the company is now embarking on a journey to manufacture batteries tailored for electric cars as well.
  • Okaya Power- Okaya Power holds prominence as a sizeable domestic company specializing in power solutions. Widely recognized for its production of batteries utilized in applications such as telecom towers and solar power systems, Okaya Power is actively expanding its operations to include the creation of batteries designed specifically for electric vehicles.


In the end, delving into the intricacies of an Electric Vehicle (EV) reveals a profound understanding of its environmental benefits, but that is just the beginning. Think about the battery that gives the car power and the motor that makes it move. 
Each part plays a pivotal role in ensuring the smooth operation of these eco-friendly vehicles. Being a center of innovation, India has seen a rise in suppliers of electric vehicle parts. As time goes on, it becomes clear that EVs are not merely a passing trend but rather an important step toward a sustainable future. 

If you’re still in doubt, visit Intellipaat’s Electric Vehicle Community page to gain more knowledge about electric vehicles.

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