Preguntas de entrevistas para Battery engineer

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Preguntas de entrevista para Battery Engineer compartidas por los candidatos

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Apple
Se le preguntó a Mechanical Engineer - Core Input Device Team and Battery Team…14 de marzo de 2016

If you have a diving board that is three body lengths long, 1 inch thick and shoulder width wide what dimension should you reduce if you want to decrease deflection the most for the least change?

3 respuestas

Length

the thickness is the smallest value of L * w * h doubling the h, will yield 8x less deflection Menos

Change the cross section from rectangle to a "T" or a "W"

Apple

Between the following materials, steel, magnesium, titanium, copper, aluminum, which is the most stiff and why? What does the stress strain plot look like for steel versus aluminum? What should you do if you want to increase the force until fracture? What would the stress strain plot look like if you took a material went until ultimate strength and then went back to zero stress and then went back to ultimate strength?

2 respuestas

The answer is steel

Steel has the highest stiffness as defined by the Young’s modulus.

Apple

What are the multiple different ways of combining two rectangular bars of a metal into a T-shape

2 respuestas

Welding, fastening etc.

Brass Brazing TIG/MIG welding Adhesives - LDA, PSA Fasteners Laser welding spot welding Magnets Over-molding a third component Menos

Faraday Future

Technical, mostly. Describing all of my battery work experience and answering some key questions specific to the battery cell design that the company had been using.

1 respuestas

Since it was all based on my experience, I'd say that I was able to get over 80% of my answers correct. Menos

Apple

Q: If a company came out advertising that this whiteboard marker can write 500 miles of ink, how would I test that to be true?

1 respuestas

A: You could test it by trying different materials, different pressures, different aging of the marker, and at different temperatures. After I answered, they said that I could've also said that the statement is too vague and to take it up to the marketing team. Menos

Apple

Describe what happens when the battery experiences cold temperatures?

1 respuestas

The resistance increases when at colder temperatures (0-30 C) therefore higher voltage drop when measuring OCV and can lead to high SOC error Menos

Apple

How does buck converter work ?

1 respuestas

Drew block diagram for buck converter and explained the operations in detail. Also graphed the output voltage at different stages in the design Menos

Okaya Power

on the basis of battery's fault

1 respuestas

I'm say that the ans of your question

Apple

Connect a current source to a capacitor. What is the voltage vs time graph

1 respuestas

I = c dv/dt . Find the integral . Since the current is constant the result would be a linear graph Menos

Bird

Previous experiences

1 respuestas

Go down to basics of experience in technical terms

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