Inner volume of assembly with high amount of components

[ePowertrain]

Hello!

I have a large assembly (HV battery of a truck), and want to determine the inner volume that needs to be filled with air during tightness testing of the final product.

The inner volume of the empty battery housing itself was easy. That I already have created, as one solid body.

Now I'm trying to subtract all the inner components, but it's giving me error messages. It's a lot of small bodies in there, like a 5-digit number, I guess. So it's really tricky to find out, which exactly are causing the problems.

It's not working and it's starting to drive me insane.

This "Wrap" function is not exact enough, it does too many interpolations and would lead me to a wrong volume.

How would you do it, or have done it?

Thanks for the hints!

 

[cowski]

It's a lot of small bodies in there...

How many of these small bodies are unique? If you have high quantities of a few unique parts, I'd suggest measuring the volume of each unique part, multiplying that by the quantity, sum up the totals, and subtract from the housing cavity volume.

Or, if there is symmetry in the layout of the parts, you could measure the volume of one "cell" of the assembly and multiply that by the number of cells required.

...it's giving me error messages.

What do the error messages say? If a volume check is giving an error message or a zero result, you might have bad geometry in one or more of the parts.
faq561-2116

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[ePowertrain]

The cells are re-used multiple times, so this approach works for that part, at least.

But then there is the E-/E-compartment with loads of different uniquely shaped parts and cables and connectors and whatnot. I mean, the small stuff I can just neglect and hide, but there are bigger parts in there, too.

 

[3DDave]

Would it not work to ignore the housing and compute the volume of the interior parts? The volume remaining is the empty volume minus the internal component volumes.

If you are trying to build a solid model of the remaining volume, that's likely to be a problem.

 

[SDETERS]

Look into using space finder. This will fill up a cavity with voxels. Gives you a good inner volume