Battery Design Engineer

Flextron EV; Bengaluru; On-site; INR 1,200,000 - 1,800,000; Full time

Job summary

Flextron EV is seeking a Battery Design Engineer in Bengaluru to design and develop high-performance lithium-ion battery packs for electric vehicles. The successful candidate will be responsible for the end-to-end design process, ensuring performance, safety, and manufacturability standards are met.

Key qualifications include a degree in Mechanical Engineering, at least 5 years of relevant experience, proficiency in SolidWorks, and strong communication skills. Join us in revolutionizing the electric vehicle ecosystem in India!

Qualifications

• Minimum 5 years in battery pack design within the EV industry.
• Proficiency in SolidWorks with advanced 3D modeling and assemblies.
• Strong grasp of thermal management principles in fast-charging.

Responsibilities

• Lead mechanical and structural design of battery packs.
• Conduct structural, vibration, and thermal analysis.
• Ensure designs adhere to EV and battery safety standards.

Skills

SolidWorks

Thermal management

Battery electricals

Mechanical design

Documentation and communication

Education

B.E./B.Tech in Mechanical Engineering, Mechatronics

Tools

Ansys

PDM/PLM systems

Job description

Battery Design Engineer

Location: [Bangalore, India] Department: Engineering and Product Development Experience Required: Minimum 5 years Employment Type: Full-time

About the Role

We are looking for a Battery Design Engineer with deep expertise in designing and developing high-performance lithium-ion and lithium iron phosphate (LFP) battery packs for electric two-wheelers and three-wheelers. The ideal candidate should have a strong foundation in SolidWorks, structural and thermal design, battery pack electricals, and experience taking products from concept to mass production.You will be responsible for end-to-end design — from mechanical layout and cell configuration to enclosure design, busbar fabrication, and manufacturing validation ensuring the battery packs meet performance, safety, and manufacturability standards, particularly for fast-charging applications.

Key Responsibilities

• Lead mechanical and structural design of lithium-ion and LFP battery packs using SolidWorks (mandatory).
• Develop designs for both cylindrical and prismatic cell formats.
• Design busbars (copper, aluminum, nickel, hybrid) with emphasis on current carrying capacity, heat dissipation, and manufacturability.
• Conduct structural, vibration, and thermal analysis to ensure reliability under road and environmental conditions.
• Design battery enclosures with consideration for IP rating, cooling, safety, and manufacturability.
• Work closely with electrical engineers to integrate BMS, sensors, fuses, and wiring harnesses seamlessly within the pack.
• Define and validate fast-charging mechanical and thermal design requirements.
• Collaborate with manufacturing and supply chain teams to transition designs from pilot to production scale
• Support prototype assembly, design validation, and root cause analysis for field issues
• Maintain accurate design documentation, BOMs, drawings, and revision histories.
• Ensure designs adhere to relevant EV and battery safety standards (AIS-156, IP67, UN38.3, etc.)
• Apply DFM/DFA (Design for Manufacturing/Assembly) and project management principles to ensure timely delivery of design milestones.

Key Skills & Requirements

• Education: B.E./B.Tech in Mechanical Engineering, Mechatronics, or equivalent.
• Experience: Minimum 5 years in battery pack design within the EV industry
• Proficiency in SolidWorks — advanced 3D modeling, assemblies, motion study, and drawings.
• Hands-on experience designing packs with cylindrical (e.g., 18650/21700) and prismatic cells.
• Understanding of battery electricals — series/parallel configurations, insulation, creepage/clearance distances.
• Strong grasp of thermal management and heat dissipation principles in fastcharging environments
• Experience in metal fabrication, CNC machining, sheet metal, and plastic molding processes.
• Exposure to structural FEA, vibration, and drop testing simulations.
• Familiarity with battery integration in EVs, especially 2W and 3W platforms.
• Proven track record of taking at least one battery product from prototype to mass production.
• Strong documentation and communication skills, with the ability to work crossfunctionally.
• Knowledge of PDM/PLM systems is an added advantage.
• Understanding of GD&T, tolerance stack-up analysis, and design validation testing

Desirable Attributes

• Experience working with fast-charging battery packs (≤15 minutes charge time).
• Familiar with thermal simulation tools (Ansys, SolidWorks Simulation, etc.).
• Exposure to IP-rated design and safety-critical systems.
• A structured, analytical, and detail-oriented design mindset.
• Hands-on experience working in factory and prototyping environments.
• Strong sense of ownership, accountability, and design discipline.

Why Join US

At Flextron (ft.energy), we are revolutionizing the way electric vehicles charge-- building ultra-fast-charging batteries and intelligent energy systems that enable sustainable mobility. You’ll be part of a team that’s redefining battery performance, speed, and reliability for India’s EV ecosystem.