http://sydney.edu.au/news-opinion/n...dney-charges-ahead-on-zinc-air-batteries.html
University of sydney announced that they created a working battery with 3.4 times the energy density of today's best lithium.
Oh.. 60 cycles to 10% might sound bad until you think about how much energy this battery would be able to charge and discharge over it's life.
Let's say that the big Model S is doing 330 miles on 100kwhrs. That's 3.3 miles per kwhr. 3.3 miles per kwhr is 1122 miles on a 340kwhr pack then. ( with the assumption that 340kw-hr can fit in the same space and weight, based on the improved energy density of this battery. )
So this battery loses 10% of it's energy capacity after 67,320 miles of travel, which reduces your total range to about 1009.8 miles. Not a big deal.
Assuming this battery degradation curve is linear..
After 120 cycles or 134,640 miles, we are down to an 897.6 miles of range.
After 180 cycles or 201,960 miles, we are down to 785.4 miles of range.
After 240 cycles or 269,280 miles, we are down to 673.2 miles of range.
After 300 cycles or 336,600 miles, we are down to 561 miles of range.
After 360 cycles or 403,920 miles, we are down to 448.8 miles of range.
After 420 cycles or 471,240 miles, we are down to 336.6 miles of range.
A battery like this could outlast the sheet metal that's wrapped around it, unless there are some hidden hitches, like a really poor calendar life.
If it is capable of 0.5C of discharge at the least, this could be a mind blowing development for ebikes. The only problem is that it's something like 0.5V nominal, so for a 36v battery pack, you are going to need 72 cells in series.. :lol: there will need to be a paradigm shift in how BMSes are designed if this type of battery requires one.
University of sydney announced that they created a working battery with 3.4 times the energy density of today's best lithium.
Oh.. 60 cycles to 10% might sound bad until you think about how much energy this battery would be able to charge and discharge over it's life.
Let's say that the big Model S is doing 330 miles on 100kwhrs. That's 3.3 miles per kwhr. 3.3 miles per kwhr is 1122 miles on a 340kwhr pack then. ( with the assumption that 340kw-hr can fit in the same space and weight, based on the improved energy density of this battery. )
So this battery loses 10% of it's energy capacity after 67,320 miles of travel, which reduces your total range to about 1009.8 miles. Not a big deal.
Assuming this battery degradation curve is linear..
After 120 cycles or 134,640 miles, we are down to an 897.6 miles of range.
After 180 cycles or 201,960 miles, we are down to 785.4 miles of range.
After 240 cycles or 269,280 miles, we are down to 673.2 miles of range.
After 300 cycles or 336,600 miles, we are down to 561 miles of range.
After 360 cycles or 403,920 miles, we are down to 448.8 miles of range.
After 420 cycles or 471,240 miles, we are down to 336.6 miles of range.
A battery like this could outlast the sheet metal that's wrapped around it, unless there are some hidden hitches, like a really poor calendar life.
If it is capable of 0.5C of discharge at the least, this could be a mind blowing development for ebikes. The only problem is that it's something like 0.5V nominal, so for a 36v battery pack, you are going to need 72 cells in series.. :lol: there will need to be a paradigm shift in how BMSes are designed if this type of battery requires one.
