How to check a battery with a high mileage Zero S 2017r 50 thousand mileage

Hello, I am planning to inspect the 2017 Zero S motorcycle. Zero is imported from France and has over 50,000 mileage. The seller does not know too much, but says that he does 350 km around the city. I wanted to check it carefully, specifically the battery because the motorcycle costs quite a lot and I would not like to make a new one after some time. Is there any way to check it?

https://www89.zippyshare.com/v/IrRclL3K/file.html

https://www89.zippyshare.com/v/K3jCdO6x/file.html

Regards

I would bet that this forum:
https://www.zero-forum.com/
has some documentation of any built-in testing the system itself can do.

This is another
https://www.electricmotorcycleforum.com/boards/index.php?board=35.0

I've never visited either one, other than some google searches now and then, so I don't know for sure what info they have.


To test the battery itself outside the system, it depends on exactly what you want to test for, as to what you would have to do.

If just doing a capacity/range test, the simplest way is to fully charge the bike, then ride it under the conditions you expect to encounter in your everyday usage until it says it is near-empty. The range you get in that test would be about the range you would typically get (this range will decrease by a bit every ride, possibly nearly unnoticeably, depends on the age and health of the battery itself and the actual usage).

Otherwise you'd need a test load sufficient to draw as much power from the battery as the bike would, and a way to "turn on" the battery (assuming it doesn't just output power without being connected to the bike, which it might not do if it has a safety feature for this), and a "wattmeter" or coulomb-meter to test the battery's capacity (Ah / Wh) and voltage drop under a load equivalent to what the bike would put it under during typical usage. Then compare the readings from the meter to what the specs Zero gave the battery when new, and see if the difference is acceptable to you.

You can also use those readings to guesstimate range, based on others' reports of Wh/mile or Wh/km usage for their Zeros of the same model under similar riding conditions to yours.

Thank you very much The only test that comes to my mind is to fully charge, do 10km and compare the% and voltage with someone who has a new battery, e.g.

A comparison with a new one (that probably has a different battery type, probably different cells with different characteristics) won't really tell you about the battery in this specific Zero. It might give you an approximate estimate of the difference in capacity they have from each other...but only over the range used.

To know what it is going to do over the whole range of capacity of the pack it has, you pretty much have to use the actual pack thru that whole range. :/

If a pack has a problem, it often only shows up as it gets closer to empty, which is where cells with lower capacity or capabilities than others start showing their problems by the pack cutting out early (especially under higher loads) or the control system rolling power back to prevent cutout.

If all cells are equal capacity and capability, then they will all drain equally as well, and it will behave better under load as it gets closer to empty; it will simply be lower in total capacity due to age.