..... Our latest method involves tapping into the HV battery with a series wire loop in a safely modified service disconnect switch and a calibrated current clamp. ...
Service Plug area is not a consumer-oriented solution. Those who have no clue about lethal effect of High Voltage and DC should not try that at home...
It is doable to "tap into" few areas with my Analyser (DC sensors are calibrated) and do the real life test by measuring capacity during road trip. But you could just drive and measure the range the car could go without all those extra efforts..
Capacity could be of interest when you buy or sell the pack as a product not attached to the car (i.e. indicative of the possible range).
What we would like to know apart from Usable Remaining Capacity (URC) of entire pack - is individual module capacity being measured/tested under the same conditions. That would be good to know at the point when you make a decision to buy that second hand/or rebuild pack.
But if you already got the pack - you can just attach it to the Leaf, reprogram VCM for it to accept LBC and drive the car - you's see the range and use LeafSpy if you wish... it is easier and faster then testing that pack for capacity in the Lab..
If there is a demand in the future - I may look into offering that "quick reprogramming" using dealership scanner in Auckland, but there is no demand right now.
My concern with sourcing second hand batteries in general and existing re-builders in Japan and New Zealand is:
- Unfortunately it is not that easy (not fast/ not cheap) to open pack in Leaf and check serial numbers (as I do in hybrids) to see if they have been swapped. Capacity is good to know but I would like to know date of manufacture as well!
- Second hand packs are very rarely accompanied with reliable data (genuine or rebuild, real ODO, real date of manufacture...)
P.S. Huge pile of Hybrid Failed Battery Packs I have tested lately ~10% were genuine, ~90% - already rebuilt by somebody else. Observed mixture of modules from different years and different state of degradation :-(
Same is happening with EV batteries already in NZ - there are people who are already doing swaps of modules.