Aftermarket iMiEV battery upgrade project

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Pierantoine
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Re: Aftermarket iMiEV battery upgrade project

Post by Pierantoine » Wed, 18 Sep 2019, 22:48

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.

Pierantoine
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Re: Aftermarket iMiEV battery upgrade project

Post by Pierantoine » Wed, 18 Sep 2019, 22:51

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

mark_hetho
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Re: Aftermarket iMiEV battery upgrade project

Post by mark_hetho » 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.

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jonescg
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Re: Aftermarket iMiEV battery upgrade project

Post by jonescg » Thu, 19 Sep 2019, 09:46

3.6V60Ah-NMC.pdf
(190.09 KiB) Downloaded 39 times
AEVA National Secretary, WA branch chair.

Pierantoine
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Re: Aftermarket iMiEV battery upgrade project

Post by Pierantoine » Thu, 19 Sep 2019, 23:57

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.

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Re: Aftermarket iMiEV battery upgrade project

Post by Pierantoine » Fri, 20 Sep 2019, 00:14

And what do you think of that https://www.alibaba.com/product-detail/ ... abb1m2ubNA
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 Discharge Current 2C
6    Peak Discharge Current   4C
7    Charge Cut-off Voltage   4.2V
8    Discharge Cut-off Voltage 2.75V
9    Inner Resistance         0.5mΩ-1mΩ
10   Weight                   1.25kg
11   Dimension                Length: 91mm
                              Width: 149mm
                              Thickness:  38mm
12   Operating Temperature    Charging: 0°C ~ 45°C
                              Discharging: -20°C ~ 55°C
13   Storage Temperature      optimal store temperature of 23 ± 5°C for long term storage
14   Life Cycle               >2500 times
[ Edited Coulomb: formatting for readability ]

Pierantoine
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Re: Aftermarket iMiEV battery upgrade project

Post by Pierantoine » Sun, 22 Sep 2019, 21:00

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 ?

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jonescg
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Re: Aftermarket iMiEV battery upgrade project

Post by jonescg » Sun, 22 Sep 2019, 21:15

That should only matter for the ones sitting right-way-up in the middle of the battery pack. All others are normally on their sides, but these can be made to work standing upright.
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Pierantoine
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Re: Aftermarket iMiEV battery upgrade project

Post by Pierantoine » Sat, 19 Oct 2019, 17:54

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.

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Re: Aftermarket iMiEV battery upgrade project

Post by Pierantoine » Sat, 19 Oct 2019, 17:57

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 !

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