Battery water proofing


enjoythesilenc

Well-known member
Location
virginia
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Its mentioned in here that some of the bike is ISO x rated as waterproof.

I posted when i first got my Alta about worrying about water crossings and was reassured that the bike would be ok, especially after watching the Alta in the abandoned water park video. Unfortunately, there has been a good handful of bikes posted as having water ingress and battery corrosion issues.

I'm wondering if it would be worth it augment the waterproofing supplied by the factory. I'm talking about the people already working on batteries offering another service in the name of preventative maintenance. Why not add dessicant bags on the dry side of the bladder? Why not coat the pcbas, wirebonds etc with a conformal coating? Why not stabilize the r pack wirebonds with a dollop of adhesive? How much respiration volume is required by the battery case? What about some sort of provision to purge the case with compressed nitrogen or argon after a watery ride?

It seems like the hermetically sealed case is a great idea until it fails. then you don't know it failed until catastrophic damage is done. Either need to keep the water or the oxygen out, somehow.
 

enjoythesilenc

Well-known member
Location
virginia
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Water ingress corrosion. No history of drowning.

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enjoythesilenc

Well-known member
Location
virginia
Another battery thread got me interested in looking at humidity sensor data stored in multitool. I see that humidity has been around 35-45% inside the battery when looking at "ride data" I gave my bike a spray down two days ago but avoided the bottom screen area. Its 38% humid at the moment.

If the battery is technically sealed, shouldnt the humidity stay the same as when it was assembled, in theory? Were the batteries sealed up in SF and what is the general humidity there, or were they sealed in a humidity controlled environment?

What humidity throws a code 37?

What humidity levels do others see in their own bikes and is it consistent to local conditions? Is a battery in phoenix vastly different than one in florida?
 

bluefxstc

Well-known member
If the battery is technically sealed, shouldnt the humidity stay the same as when it was assembled, in theory? Were the batteries sealed up in SF and what is the general humidity there, or were they sealed in a humidity controlled environment?
For most humidity ratings, it is a relative percentage number based on temperature. The warmer the air, the more moisture it can handle, so as temperature goes up the relative humidity goes down for a given amount of moisture in the air. I don't know for sure if this is how Alta measures the humidity in the battery pack, but it probably is since it is the most common way of measurement for humidity.

Also, while the pack is rated as "waterproof", I believe that this is only for a certain depth for a given amount of time. I am reasonably certain that there is some slow air seepage into and out of the pack, so the pack will eventually stabilize at the average relative humidity of the environment it is normally in.
 

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