AEVA Forums

Replacing only worst cells is not a good solution because of the voltage / current curve. To be interesting the voltage difference between a group of good and bad must be really high. it can happend if there is a problem on one cell or two but if it s just because the pack is too old the difference ...

Congratulations I really want to see next steps and first tests !

If the miev could be the first open source car it would be easier to make the right firmware and update and upgrade it every day !

Chinese batteries always charge max to 1C...
The BMS of the miev charge at 125A for several minutes.
Hard to find a battery that takes this in the bev2 format.

jonescg wrote: ↑Thu, 19 Sep 2019, 09:46 3.6V60Ah-NMC.pdf

Thanks for the datasheet...
Size : (L148x H133x W27mm)

The height is about 20mm more than the original, Does it fit ?
What are the real maximum dimensions we can accept ?

And what do you think of that https://www.alibaba.com/product-detail/OSN-POWER-lithium-ion-3-7V_60818868618.html?spm=a2700.details.maylikeexp.1.4ddfabb1m2ubNA No. Items Specifications 1 Nominal Voltage 3.7V 2 Nominal Capacity 72Ah 3 Standard Charge Current 0.2C 4 Max. Charge Current 1C 5 Continuous ...

mark_hetho wrote: ↑Thu, 19 Sep 2019, 08:01 I can't find the 78Ah model you refer to, but those dimensions seem ideal, and 78Ah would be a good step up without wasting too much if the BMS only recognises 60ah.

You are right, everything doesn't seem to be on their website but they have it ! It is made by LiYuan.

First work should be adapting the temperature sensor to another cell.

Thanks but what is your 60Ah ?
They also have a NCM 3.68v 78Ah ( 150mm X W40mm X H98mm) , that fits in the LEV dimensions.

Could you please give me a link on the product or a datasheet ?

There will be about $7500 worth of cells in an iMiEV, and probably another couple of grand in labour putting it all together. It should give about 150 km range though. Hello, I'm really interested in this project. Have you installed the new pack of LiYuan cells ? is there any problem or does it wor...