Long charge tie on new EVE cells

[Mr. Eddie]

Hellob v-

This is my first experience building a lithium battery, and I have a question about the charging time of my new Grade A EVE cells. I have a new Hanmatek model 310 bench charger, and set it to 3.6V and 10a before hooking it up to a single EVE cell. Obviously, with the power turned off. Cell measured 3.30v prior to charging, and I have had it on the charger for almost 50 hours. The voltage has risen slowly up to 3.37 in all that time. Am I missing something here?

The display on the charger shows 3.60v and about 1.16a. It seems to be taking a hella long time to charge, and I have 7 more to go before I do a top balance at 3.65v.

 

[sunshine_eggo]

Missing info.

The top balancing guide spells it all out in detail and gives recommendations that can reduce charge times by 90%. It also instructs you to trash the leads that come with the power supply and build your own.

Assuming 280Ah EVE cells, they normally ship at about 30%, so you need 196Ah. At 10A, that's nearly 20 hours, but because you have crappy leads, you haven't been at 10A the whole time.

 

[upnorthandpersonal]

You have bad connections. Ditch the alligator clips, put some proper ring terminals on some thick cables and you will see 10A going to the cell. The plugs at the power supply screw off to attach a ring terminal behind.

 

[Mr. Eddie]

Thanks. I picked up some 10ga cable today as well as some appropriate ring terminals for assembly tomorrow. Alligator clips getting ditched as well!