Hi. I'm starting to think about replacing the batterys in my emax. Powercheqs are recommended, but at $60 a pop I'm wondering if there is any advantage to them over just having an individual charger for each battery?
The documentation for powercheqs hints that they are doing something when you are discharging the battery, but all anyone on here talks about is what it does during charging. do they kick in when they batterys are not being used, like at a stop light, in order to correct the imbalances that while arise as these batterys discharge? Do they create a delayed response time from the battery?
Even if they are doing something magical while the scooter is at rest they seem like they introduce inefficiency into the system--they are, in bastardized computer science terms, bubble sorting the battery power because they can only balance pairs. I assume this is why they don't recommend them for long chains? What's needed is a merge sort system. The batterys are split into 2 groups. These 2 are balanced against each other. Then each group is split into 2 groups which are balanced, etc. This way if you had an undervoltage battery on one end and an overvoltage battery on the other the power wouldn't have to "bubble" across the good batterys. ...or some other more intelligent way(selection sort) that transfers the power just between the ones that need it. It seems like making these pair balancing power cheqs makes sense from the manufacturer's perspective since you just buy a number of them an configure them however you want, but from the perspective of the owner/designer of an EV do they?
and one more thing...aren't oowercheqs a bandaid for bad batterys? Why not use the hundreds of dollars spent on powercheqs getting good batterys instead?