Hi,
Most candidates can answer definition questions.
Very few can handle the follow-up.
Here’s a highly technical question asked in Tata Motors EV system/validation interviews
Q: What is the purpose of cell balancing in a battery pack?
A: It reduces SOC/voltage mismatch between cells to improve usable capacity, safety, and pack life.
Interviewers don’t stop there.
Follow-up question interviewers ask:
How do you decide between passive vs active balancing, and what signals/logs prove balancing is actually improving pack performance?
This is where interviews shift - from “knowing terms” to system-level judgement and validation thinking.
