Antiscabs Vectrix

No worries,

you only really need the timer for the couple of days after the red battery light.

the rest of the time you can use the timer to prevent an equalisation charge, but thats really only useful in weather warmer than ~24 deg C.

The sensors would only be unplugged if the batteries were removed from the bike.

The two red circles are where the sensors and plugs will be located.

the red circle on the left shows the rear sensor plug, so you know what it will look like.

antiscab Matt

Bikes still going well,

I regularly do 100km to a charge (using less than 48Ah).

just went past 25'500km

I saw CALB now make a 70Ah cell in the same format as thudersky's 60Ah cells.

Means my next pack will give me even more range :D

http://en.calb.cn/ProductInfoExhibit/&id=11ae8962-395b-4f41-943a-00f55355e168&comp_stats=comp-FrontProduct_list-005.html

interesting to note that all cells are rated at 1C now, after several hundred cycles (so if you discharge a brand new cell at 70A you get 75Ah).

a massive improvement on the cells from yesteryear.

you would think so,

The real question is by how much.

This is not actually my first pack, so I can already tell you how long it will last.

at 1.5C continuous with 5C peaks for acceleration large format LiFePO4 cells lasted 22'000km in a bike where you only had 40km range.
That pack is actually still in service in someone elses scooter, it was at 60% of original capacity.

There are reasons why 60Ah cells in a Vectrix will do better than this (and the new 70Ah cells will do better still):
The cells do better at high discharge rates now than they did in 2007.
most notably capacity then was rated at 0.3C, where as since last year capacity has been rated at 1C continuous, after ~300 cycles.

The continuous discharge rate at 110kmh on a Vectrix on the flat is ~80A, less than the 1.5C I abused my original pack with.

I have sometimes seen 100A continuous while climbing a hill or fighting a head wind at high speed.

When you are travelling slower, the discharge rate is vastly lower (around 0.5C at 80kmh).

the peak discharge rate of 220A is less than 4C.

I'm presently at 12'500km on my LiFePO4 pack, and have experienced no capacity reduction.
I have 100km range (on most discharges) meaning I have only reached ~125 equivalent cycles.
only completed the conversion in May last year, so it will be roughly May 2013 by the time I hit the ~50'000km thats equivalent to what my old pack gave me.

Its a shame it takes so long to see the improvements in the cells service life.

Matt