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Vibration Isolation for Battery Box EV Conversion

866 Views 10 Replies 6 Participants Last post by  kennybobby
I am currently building two steel battery boxes that will house 2 modules from a Tesla Model 3 (2 per battery box stacked, supported from the side as intended). This will be going in a 4x4 and may see some off-road use but likely minimal, just typical road conditions. It will be mounted to keep a low CG to the frame so it will be on the sprung side. To me it still seems like you would want to put some sort of vibration isolation but I don't believe Teslas have any. Does anyone have any recommendations here?
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Sounds like a good idea, may be difficult to implement.

Maybe invest in the vehicle suspension to have adequate stroke for the dampers to work along with the necessary spring stiffness for the load and the expected conditions.

If you put springs on the batteries, then they are floating and have some unconstrained degrees of freedom. (unless you put them in 3 axes +/- directions)

If you use some elastomer bushing or damping foam (sorbathane), then it must be held in a preloaded condition, e.g. 90% compressed, in order to be in the effective zone, and the stroke is very limited. Also would need in 3 axes, +/- directions.

An engineered $olution is likely possible, but the requirements would need to be well defined, e.g. mass, disturbance force vectors and frequency, shock load, required frequency response.

Maybe there could be a solution short of the full-blown aids, but sounds like a moving target.
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Sounds like ChadGtd talking..:D

Concerning #2, if you stiffen the box then wouldn't MORE shock and force gets transmitted to the cells, not less?
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