The number I have seen cited for Leaf modules is 240A continuous, 540A peak, which is somewhat inconsistent with the 5C discharge rate given 33Ah cell capacity (Gen1).Hi all,
I'm specifying an EV conversion at the moment but struggling to find any details on the Leaf 30kWh cells. Specifically I'm looking for their C ratings for charging and discharging. I've been searching this forum to no avail.
The test peak power would have been limited by the controller's programming, which limits the inverter to driving the motor at no more than 80 kW output... perhaps to protect the battery, but it doesn't really indicate the battery's limit.I have also not seen any official docs from Nissan, but there is a way to calculate some stuff from the EPA test reports.
According to that doc, measured peak draw was at 87.1kW. Given nominal pack voltage of 364.8v, their current draw would be 238.8A. Since the entire pack is organized as 96s2p, that means 119A per cell.
Now this particular spec sheet didn't specify manufacturer's goals, but I've seen in similar reports continuous and max kW rating numbers as well, which would be more towards the actual specs than what they got from testing. You may find those additional reports for different year models, especially for the 30kW version.
Yeah, I saw that report as well, and it wasn't as informative as the others I've researched. Here is one for example :Thanks for the replies. I have found something useful:
I'm really looking to see what peak power I can squeeze out of these cells in ~100s2p. Obviously planning to implement individual module thermal monitoring and if I can fit it in the space, active cooling. I'm not hugely worried about stressing the pack.
It would be fantastic if I could get near 300kW, but anything above 200kW should be intense in a Micra.
So that's basically peak discharge.Figure 4 shows the battery’s 10-second charge and discharge pulse power capabilities as a function of
energy discharged. The Medium PHEV battery target performance goals of 37 kW discharge power and
25 kW charge power
Well, Volt was just a handy example. Another route could be to go with smaller cells, but more of them in parallel to achieve higher discharge currents. Take a look at BMW i3 packs for example. Also BMW uses air for thermal management.Yes agreed the Volt battery would be a better choice! Unfortunately in the UK, we seem to have very limited options.