Role

Battery Thermal Management Engineer

EV-specific role blending thermal, fluid, and packaging skill at OEMs and suppliers.

14 chaptersAbout 5–6 months15–30 min a day12 skills2 projects
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Day 1 on the Battery Thermal Management Engineer path.

What a Battery Thermal Management Engineer does

Design the cooling and heating systems that keep an electric vehicle (EV) battery in its safe temperature window, so packs charge fast, last long, and resist overheating. Battery standards and safety targets vary by market, so designs are tuned to the regions a vehicle is sold in.

  • Design liquid-cooled cold plates, coolant paths, and heaters for battery packs
  • Run computational fluid dynamics (CFD) and thermal simulations to predict pack temperatures
  • Size pumps, valves, and radiators for the battery thermal management system (BTMS)
  • Design safety features that slow or contain thermal runaway between cells
  • Build and test prototype packs with sensors under real charge and drive cycles
  • Package cooling parts into tight space with mechanical and electrical teams
  • Write requirements, test reports, and design changes for production release

A day in the life

  1. Review overnight test data and decide which design to change next
  2. Set up a CFD run, check mesh quality, and watch solver progress
  3. Meet with pack, cell, and packaging teams to trade off space and cooling
  4. Wire up thermocouples on a prototype pack and start a fast-charge test
  5. Compare simulated temperatures to measured ones and document the gap

Tools you will use

CFD and thermal: ANSYS Fluent, STAR-CCM+, GT-SUITECAD: CATIA, Siemens NX, SolidWorksScripting and analysis: Python, MATLABBattery and system modeling: Simulink, AMESimTest equipment: thermocouples, IR camera, battery cyclersData logging: NI LabVIEW, DAQ systems

Your plan

Chapter by chapter.

1~2 wks

See the work of a Battery thermal management engineer

StartFree
2~2 wks

Thermal system design

Skills
3~2 wks

Design write-up: explain one of your own CAD assemblies

Proof
4~2 wks

Battery safety and risk

Skills
51–2 wks

Meet people doing the work

People
6~2 wks

Simulation and engineering analysis

Skills
7~2 wks

Testing and validation

Skills
8~2 wks

Technical communication and documentation

Skills
9~2 wks

Working with people

Skills
10~2 wks

Critical thinking and problem solving

Skills
11~2 wks

Battery module cold-plate cooling: simulate a charge cycle, compare to a measured test

Proof
121–2 wks

Prepare for Battery thermal management engineer interviews

Interview
131–2 wks

Choose your route into Battery thermal management engineer work

Decide
14on your timeline

Apply for Battery thermal management engineer roles

Apply

By the last chapter

This is what you can show.

Things you've made

Design write-up: explain one of your own CAD assemblies and Battery module cold-plate cooling: simulate a charge cycle, compare to a measured test

Skills you can prove

12 skills, each rated on work you actually did.

People you've talked to

3 people who do the job, with a message ready for each.

Questions you can answer

18 interview questions and a mock interview, with feedback.

Credentials

8 credentials compared, so you can pick one, or decide you don't need one. None is required.

Ways in

There is more than one route.

Ways to study

  • Bachelors degree in mechanical engineering, automotive engineering, or aerospace engineering
  • Bachelors degree in chemical engineering with a heat transfer or thermofluids focus
  • Masters degree focused on thermal management, battery systems, or thermofluids
  • Technical diploma plus strong lab testing experience in thermal or battery systems

How people get their first job

  • Apply for thermal, battery, or test engineering internships at carmakers and suppliers
  • Start in battery test or validation roles and specialize in thermal testing
  • Build a portfolio with a pack cooling simulation and a measured test comparison
  • Earn short courses in heat transfer, CFD basics, and battery fundamentals
  • Join a student electric racing team and own the battery cooling subsystem

Life skills on this path: Networking · Job interviews · Job search

How the work is changing

What AI is doing to this role

How AI is changing this role · one of 6 tasks we track

Run cooling and thermal simulations

Sped up a lot

What AI does

Ansys Fluent and STAR-CCM+ now add AI surrogates. Pack runs finish in hours.

Still yours

You still decide which result to trust before you build to it.

Reviewed September 2026

In the app · Premium

The rest is in the app

  • How AI affects the other 5 tasks
  • Whether this job is growing or shrinking
  • How hard the first job is to get
  • Similar roles that are easier to get into
  • Updated every month, with sources
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How we rate a job →

Already working

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Questions

Questions about this path

How long does it take to become a battery thermal management engineer with Welica?

The path is 14 chapters, 5–6 months at 15 to 30 minutes a day. You can go faster or slower; the plan moves with you.

Do I need a degree?

Not always. Common routes are bachelors degree in mechanical engineering, automotive engineering, or aerospace engineering, bachelors degree in chemical engineering with a heat transfer or thermofluids focus, masters degree focused on thermal management, battery systems, or thermofluids, or technical diploma plus strong lab testing experience in thermal or battery systems.

What is free?

Chapter 1, See the work of a Battery thermal management engineer, is free for good. Premium unlocks the rest of the path.

Start the Battery Thermal Management Engineer path.

Chapter 1 free. About 15 to 30 minutes a day.

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