11/27/2023 0 Comments Charging lithium batteries![]() ![]() In my 4s pack, this is the positive end of my 4th cell group. This will always be the positive end of the highest numbered cell in your pack. Next, find the red wire (or the wire that is intended to the be highest cell number wire if your wires are different colors) and connect it to the same location as your positive discharge wire. This is a 4s balance wire extension cable, so it has 5 wires. Notice that there is one more wire than the number of cells that the cable is intended for. The best way to find a balance connector is to look for a balance wire extension cable and just cut off the male-pin connector. Next, you’ll wire in your balance connector. Without a BMS, you’ll only have two thick gauge wires on your battery: one on the positive terminal and one on the negative terminal These will serve as both your charging AND your discharging connections. You can find other articles and videos on those exact steps here.Īfter you’ve got your battery assembled, it’s time to the wiring. Snap together your VRUZEND caps, insert your cells and bolt on the bus bars. The normal battery construction is the same as always. To take advantage of a cheap 6s charger, I’ll build a 4s battery in this example, which will have a nominal voltage of 14.8V and a charge voltage of 16.8V, which is 4.2V per cell. The iMAX B6 charger is the common example, and clones of this common charger are available all over the place for as little as $30.īalance chargers up to 8s are a bit pricier, and models designed for 10s or 12s can really start to break the bank, depending on your budget. (Yea, this is tough stuff, I know.)Ĭheap balance chargers up to 6s (6 cell groups in series) are readily available. In that case, you’re going to need to wire in a balance connector so that you can balance charge your battery when necessary.īalance charging requires, wait for it…. A BMS also makes the charging process much easier.īut if you’re reading this article, you have probably already considered these options and have decided to not use a BMS. A good BMS makes sure you can’t overcharge your battery and keeps it from turning into a dangerous fire hazard. First of all, I’ve got to say this one last time: A BMS is generally recommended for a whole pile of reasons, the first of which being safety.
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