Need source for Recommended switched 36V charger

[tomjasz]

I have an ALUMINIUM CASE CHARGER 42V 2.5A,10S LI ION/NCM charger from Cell_Man. When I bought the charger I noticed there were chargers that had settings for charge levels. They come with a 3 position switch to set output voltage to 42V, 41V and 38V. This enables charging to approx 100%, 90% and 50% SOC.

At the time of purchase, a few weeks ago there was no option for a charger with switched settings, compatible with my battery from EM3ev.

Cell_Man battery is described as, 10S 5P, 29E cells, 36V, 13.8Ah
LC battery is described as 36V Samsung (22P) and Panasonic (NCR 18650PF)


I received my battery from LectriCycles today, after another frustrating round with FedEx, and the included charger is OK but again no switched options.

These bikes will be in storage and I would like to protect my investement and get maximum life.

Where can I find a charger with a 3 position switch for an Li Ion/NCM battery?

 

[wesnewell]

The problem you are going to run into is the bms in your battery pack probably only top balances. What this means is that when a cell reaches 4.2V charge to that cell is either cut off and/or starts a bleeding process to lower the voltage of that cell while it waits for others to catch up. Once they are all up to 4.2V, the pack is balanced. You have to have a charger that will charge to 42V for this process to happen. Anything below that will not let the pack balance, and over time cells will get so far out of balance you will loose capacity. Ask your battery manufacturer about this before you go with a smaller voltage charger or find the specs for the bms they use.

 

[tomjasz]

Again the devil in the details! Thanks!