# Re: [EVDL] Leaf module charging recommendations

```I special ordered 4 chargers from
https://evfittinggreentime.aliexpress.com/store/313864```
```
I bought 4 of their 6 amp chargers and asked them to set the termination
voltage to 12 X 4.15 volts = 49.8 volts to use with my 4 Chevy Volt Modules.
You can ask for whatever termination voltage you are comfortable with.

I previously had bought two of their 54.6 volt chargers for the 16 Calb Cells
in my motorcycle and have been very happy with their chargers working as

Damon

________________________________
From: EV <ev-boun...@lists.evdl.org> on behalf of fred via EV
<ev@lists.evdl.org>
Sent: Tuesday, January 30, 2018 3:14 PM
To: via EV
Cc: fred
Subject: [EVDL] Leaf module charging recommendations

Thanks to Jerry Dycus for selling me a great looking clean Volt battery module.
My still-working Radio Shack (top of the line) digital multimeter tells me all
the cells are within 0.01 at 3.56 or 3.57 volts.
I've found this useful bit of data:
Number of cells        36
Construction            12 in-series x 3 in parallel
Length                      9.5"
Width                        9.5"
Height                      10.5
Weight                     45 lbs
Output terminal        M6 nut
Amp Hour                47
Total Voltage           48vdc

CELL SPECIFICATIONS
Cell type                        Laminate type
Cathode material           LiMn2O4 with LiNiO2
Anode material              Graphite
Rated capacity (0.3C)   17 Ah
Average voltage            3.8 VDC
Maximum Voltage         4.2VDC
Minimum Voltage          3.0VDC
I measured 42.5vdc across each 12 cell block and the math says it should be
42.72vdc, which is close enough for my meter. It's not 48vdc and from an
earlier discussion I expected that to be the case.
When it comes to charging this battery, I would like to ensure to get the right
stuff. My experience with other lithium based batteries is that the nominal
voltage of the charger is referenced to the battery and in all cases, the
battery voltage is higher than the nominal voltage "listed." That is to say, a
36v battery charges to 42vdc and rarely drops to the 36v reference figure in
regular use. The charger, of course, pushes electrons into the battery at those
higher levels.
In the case of the Volt battery, I believe I would not want to use an
off-the-shelf charger rated for a 48v battery. My search results have all been
ending in devices with excessive top-end termination.

I would like to have an off-the-shelf solution, however, if such a charger
exists. My current collection of chargers are plug-in and go type, in that they
have appropriate profiles for charging to a specific level and tapering off as
appropriate for the pack.
As an additional consideration, this battery does not need to be charged in an
hour or even two or three. I'm amenable to a configuration that requires a ten
hour or longer charge period, especially if cost is lower.
I welcome corrections to my train of thought, even to the point of derailment
as appropriate. I'm hoping for an off-the-shelf solution that works
out-of-the-box or works with appropriate adjustments on the panel or equivalent.

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