Aftermarket iMiEV battery upgrade project

Mitsubishi EV Interest Group
antiscab
Senior Member
Posts: 2683
Joined: Mon, 26 Nov 2007, 05:39
Real Name: Matthew Lacey
Location: Perth, WA

Re: Aftermarket iMiEV battery upgrade project

Post by antiscab »

dracekvo wrote: Tue, 13 Oct 2020, 22:33 Whot you mean about battery Molicel INR-21700-P42A?
Maximum charge is 8.4A. With use 15pcs. We have max charge 126A. This is enought for DC-DC charging (max. 125A)

https://www.imrbatteries.com/content/molicel_p42a.pdf

In europe cost 1pcs 4.3€. One LEV50 = 65€. All pack 5720€.
that's a lot of welding to do, using such little cells
most of the cost would be in labour for assembly
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells
User avatar
jonescg
Senior Member
Posts: 3570
Joined: Thu, 21 Jan 2010, 23:05
Real Name: Chris Jones
Location: Perth, WA.

Re: Aftermarket iMiEV battery upgrade project

Post by jonescg »

I'm going to be using 2300 individual 18650 cells for the Prelude battery. Not looking forward to it.
In the case of repacking the iMiEV modules it worked out to be not much better than the original cells because of the wasted volume, but 21700 cells might be a better fit.
AEVA National Secretary, WA branch chair.
nuggetgalore
Groupie
Posts: 251
Joined: Sun, 11 Dec 2016, 18:02
Real Name: Andreas Tobler
Location: Rowville 3178 V
Contact:

Re: Aftermarket iMiEV battery upgrade project

Post by nuggetgalore »

dracekvo wrote: Tue, 13 Oct 2020, 22:33 Whot you mean about battery Molicel INR-21700-P42A?
Maximum charge is 8.4A. With use 15pcs. We have max charge 126A. This is enought for DC-DC charging (max. 125A)

https://www.imrbatteries.com/content/molicel_p42a.pdf

In europe cost 1pcs 4.3€. One LEV50 = 65€. All pack 5720€.
5720€ = about AUD 9440 . Add to that freight and cost of manually assembling into 88 cell units and 12 modules. If your labour cost is zero, maybe a proposition.
The amount of effort Chris put into preparing the 60Ah prismatic cell modules would be dwarfed by the amount of work required to do that with cylindrical cells. The only thing maybe a bit easier would be the the connection to the BMS boards as the paralleled cells could be placed in a straight row compared to the LiYuan 60Ah in a zigzag fashion.
dracekvo
Noobie
Posts: 4
Joined: Tue, 03 Dec 2019, 16:02
Location: Czech Rep.

Re: Aftermarket iMiEV battery upgrade project

Post by dracekvo »

My opinios is That use 60Ah is not good idea. This cells have max. charge only 60A (1C). This battery will be quick degradation with DC charging or full recuperation.
I want make cell from 21700 exactly dimension like LEV50. Yes my work cost zero. After that i can replace only some worst LEV50 and testing.
Peugeot ION 2012 (buy: 58kKm, now 85kKm)
2x Subaru Outback 2.5i LPG. 1999 350kKm and 2007 300kKm.
Peugeot J5 camper 2.5 TD, 1991 150kKM
william230
Noobie
Posts: 1
Joined: Thu, 22 Oct 2020, 20:45

Re: Aftermarket iMiEV battery upgrade project

Post by william230 »

I'm recently using 2300 individual 18650 cells for the Prelude battery. and it working properly on my side.
Pierantoine
Noobie
Posts: 11
Joined: Mon, 16 Sep 2019, 04:28

Re: Aftermarket iMiEV battery upgrade project

Post by Pierantoine »

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 between the best and the worst will not be high.
Post Reply