AltairEV is inviting applications for the position of Electrical Engineer (Battery Segment) at its Noida Sector 64 location. This opportunity is ideal for professionals with experience in Lithium Battery Design & Integration and Battery Management Systems (BMS) who are passionate about electric vehicle technology and battery innovation.

Job Details

• Company: AltairEV
• Position: Electrical Engineer (Battery Segment)
• Location: Noida, Uttar Pradesh
• Experience: 2–3 Years
• Salary: Up to ₹5 LPA
• Qualification: B.E./B.Tech in Electrical, Electronics, or a related engineering discipline
• Industry: Electric Vehicle (EV)

Key Responsibilities

• Install and integrate Battery Management Systems (BMS)
• Improve production efficiency and reduce cycle time
• Monitor quality control and minimize rejection and rework
• Handle manpower planning and shift operations
• Ensure SOP compliance and improve production yield
• Maintain safety, quality, and performance standards

Eligibility Criteria

Candidates should have:

• 2–3 years of experience in Lithium Battery Design or Integration
• Strong understanding of Battery Management Systems (BMS)
• Hands-on experience with lithium battery manufacturing systems
• Experience in the EV industry will be preferred
• Good knowledge of safety, quality, and battery performance standards

Why Join AltairEV?

• Work on cutting-edge electric vehicle battery technologies
• Opportunity to contribute to innovative EV solutions
• Competitive salary package up to ₹5 LPA
• Career growth in the rapidly expanding EV sector

How to Apply

Interested and eligible candidates can apply by sending their updated resume to the official recruitment email provided by the company.

Note: Apply as early as possible, as applications will be reviewed on a rolling basis.

Electrical Engineer (Battery Segment) Interview Questions & Answers

Here are some commonly asked interview questions for an Electrical Engineer (Battery Segment) role focusing on Lithium-ion Batteries, BMS, and EVs.

1. What is a Battery Management System (BMS)?

Answer:
A Battery Management System (BMS) monitors and manages rechargeable battery packs by:

• Monitoring voltage, current, and temperature
• Protecting against overcharging and over-discharging
• Cell balancing
• Estimating State of Charge (SOC) and State of Health (SOH)
• Ensuring safe battery operation

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2. What is the difference between SOC and SOH?

SOC (State of Charge):

• Indicates the remaining battery capacity.
• Similar to a fuel gauge.

SOH (State of Health):

• Indicates battery aging and overall condition.
• Compared to the battery’s original capacity.

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3. What is cell balancing?

Answer:
Cell balancing equalizes the voltage of individual cells in a battery pack to improve performance, extend battery life, and enhance safety.

Types:

• Passive balancing
• Active balancing

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4. Why is Lithium-ion battery preferred in EVs?

Answer:

• High energy density
• Lightweight
• Fast charging capability
• Long cycle life
• Low self-discharge
• High efficiency

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5. What are the major components of an EV battery pack?

• Battery Cells
• Battery Modules
• Battery Pack
• BMS
• Contactors
• Fuses
• Cooling System
• Temperature Sensors
• Voltage Sensors

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6. Explain CC-CV charging.

Answer:
CC-CV stands for:

• Constant Current charging
• Constant Voltage charging

Initially, the battery is charged with constant current until it reaches the maximum voltage, then charging continues at constant voltage while the current gradually decreases.

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7. What protections are provided by a BMS?

• Over-voltage protection
• Under-voltage protection
• Over-current protection
• Short circuit protection
• Over-temperature protection
• Under-temperature protection

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8. What is thermal runaway?

Answer:
Thermal runaway is an uncontrolled increase in battery temperature caused by internal failure, overcharging, or short circuits, which can lead to fire or explosion.

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9. What is the nominal voltage of a Lithium-ion cell?

Answer:

• Nominal Voltage: 3.6–3.7 V
• Fully Charged: 4.2 V
• Cut-off Voltage: 2.5–3.0 V

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10. What is C-rate?

Answer:
The C-rate defines how quickly a battery is charged or discharged.

Example:

• 1C → Battery charges/discharges in 1 hour
• 2C → 30 minutes
• 0.5C → 2 hours

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11. Explain series and parallel battery connections.

Series Connection:

• Voltage increases
• Capacity (Ah) remains the same

Parallel Connection:

• Capacity (Ah) increases
• Voltage remains the same

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12. What is an EV inverter?

Answer:
An inverter converts DC power from the battery into AC power to drive the electric motor.

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13. What is regenerative braking?

Answer:
Regenerative braking recovers kinetic energy during braking and converts it into electrical energy to recharge the battery.

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14. What causes battery degradation?

• High temperatures
• Deep discharge
• Overcharging
• Fast charging
• Aging
• High charging/discharging currents

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15. What is battery cycle life?

Answer:
One charge and one discharge equal one battery cycle. Cycle life refers to the number of cycles a battery can complete before its capacity drops significantly (typically to about 80% of its original capacity).

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16. What safety precautions should be followed while handling Lithium-ion batteries?

• Wear appropriate PPE
• Prevent short circuits
• Avoid overcharging
• Handle batteries carefully to avoid physical damage
• Monitor battery temperature
• Use insulated tools

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17. What is SOP in battery manufacturing?

Answer:
Standard Operating Procedure (SOP) is a documented process that ensures manufacturing activities are performed consistently, safely, and according to quality standards.

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18. What quality checks are performed during battery pack assembly?

• Cell voltage matching
• Internal resistance testing
• Insulation resistance test
• BMS functional testing
• Charge-discharge testing
• Leak test (if applicable)
• Visual inspection

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19. Why do you want to work in the EV industry?

Sample Answer:
“I am passionate about sustainable transportation and clean energy. The EV industry is rapidly growing, and I want to contribute my skills in battery systems and electrical engineering while continuing to learn advanced EV technologies.”

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20. Tell us about yourself.

Sample Answer:
“I am an Electrical Engineer with 2–3 years of experience in lithium battery design, Battery Management Systems (BMS), and battery pack integration. I have worked on battery testing, quality improvement, troubleshooting, and production support. I am eager to contribute to innovative EV projects and continuously enhance my technical expertise.”