by DaveinOlyWA (Posted Fri, 21 Jun 2013 11:43:55 GMT)
Not gonna happen. That would mean that Nissan allowed the cells to charge to greater than 4.10 volts, which is very bad for the battery pack. They would end up with more battery packs being replaced under warranty--wouldn't make any sense.
"Most Li-ions are charged to 4.20V/cell and every reduction of 0.10V/cell is said to double cycle life. For example, a lithium-ion cell charged to 4.20V/cell typically delivers 300–500 cycles. If charged to only 4.10V/cell, the life can be prolonged to 600–1,000 cycles; 4.00V/cell should deliver 1,200–2,000 and 3.90V/cell 2,400–4,000 cycles."
See http://batteryuniversity.com/learn/arti ... _batteries
oh ya, forgot about that part...oh well, i knew it seemed too easy
Stoaty wrote:
DaveinOlyWA wrote:
that concept is hard for me to wrap my head around especially with people monitoring their GIDs. now if (not sure of the exact numbers so generalizing) a new battery has 300 GIDs and we can see 281 to 4 with 277 usable. what if after the programming, we are "accessing" 291 to 4 GIDs but due to degradation we have no more than 277 usable. (which would actually be much less than that due to degradation) is that possible?
Not gonna happen. That would mean that Nissan allowed the cells to charge to greater than 4.10 volts, which is very bad for the battery pack. They would end up with more battery packs being replaced under warranty--wouldn't make any sense.
"Most Li-ions are charged to 4.20V/cell and every reduction of 0.10V/cell is said to double cycle life. For example, a lithium-ion cell charged to 4.20V/cell typically delivers 300–500 cycles. If charged to only 4.10V/cell, the life can be prolonged to 600–1,000 cycles; 4.00V/cell should deliver 1,200–2,000 and 3.90V/cell 2,400–4,000 cycles."
See http://batteryuniversity.com/learn/arti ... _batteries
oh ya, forgot about that part...oh well, i knew it seemed too easy