Battery Charging Question...
12-17-2018 | 08:26 AM
#16
Another thing to consider is that charge rate and charge time are not a linear relationship. The Lipo CC-CV charge algorithm tapers current through the last 15-20% of the charge so that that last part can take a while.
For a charger, look ultrapower. I believe they make chargers for several more mainstream brands (the UP120AC looks a great deal like one of Reedy's chargers). Now that you know the wattage you are looking for, you might find what you need there for much less $$ than some of the bigger-name brands. I have a UP100AC Duo. It's tiny, charges two 2s batteries at a time, as fast as I need and runs on AC power. I only wish discharge power was greater, because it takes a long time to storage-discharge at only 1.3a. Bigger chargers should be more powerful in this way.
For a charger, look ultrapower. I believe they make chargers for several more mainstream brands (the UP120AC looks a great deal like one of Reedy's chargers). Now that you know the wattage you are looking for, you might find what you need there for much less $$ than some of the bigger-name brands. I have a UP100AC Duo. It's tiny, charges two 2s batteries at a time, as fast as I need and runs on AC power. I only wish discharge power was greater, because it takes a long time to storage-discharge at only 1.3a. Bigger chargers should be more powerful in this way.
12-17-2018 | 08:58 AM
#17
Joined: Jul 2004
Posts: 2,637
With current racing batteries, charging at 3C+ should be no issue.
12-17-2018 | 10:36 AM
#18
If you are going to race, chances are you will never have to recharge a battery from zero so your charge times will be a lot less.
Example... I use 2s 8000ma batteries in my SCT... 10 min race I still have approx 25% of the battery left.
I use a Protek charger that is 80w and I charge at 8a. It takes about 30 minutes to charge back to full capacity.
LVC is set at 3.2
Note that I never run my batteries down to low volt cut-off... I use a timer set to 8 minutes when practicing.
Example... I use 2s 8000ma batteries in my SCT... 10 min race I still have approx 25% of the battery left.
I use a Protek charger that is 80w and I charge at 8a. It takes about 30 minutes to charge back to full capacity.
LVC is set at 3.2
Note that I never run my batteries down to low volt cut-off... I use a timer set to 8 minutes when practicing.
12-17-2018 | 10:39 AM
#19
Another thing to consider is that charge rate and charge time are not a linear relationship. The Lipo CC-CV charge algorithm tapers current through the last 15-20% of the charge so that that last part can take a while.
For a charger, look ultrapower. I believe they make chargers for several more mainstream brands (the UP120AC looks a great deal like one of Reedy's chargers). Now that you know the wattage you are looking for, you might find what you need there for much less $$ than some of the bigger-name brands. I have a UP100AC Duo. It's tiny, charges two 2s batteries at a time, as fast as I need and runs on AC power. I only wish discharge power was greater, because it takes a long time to storage-discharge at only 1.3a. Bigger chargers should be more powerful in this way.
For a charger, look ultrapower. I believe they make chargers for several more mainstream brands (the UP120AC looks a great deal like one of Reedy's chargers). Now that you know the wattage you are looking for, you might find what you need there for much less $$ than some of the bigger-name brands. I have a UP100AC Duo. It's tiny, charges two 2s batteries at a time, as fast as I need and runs on AC power. I only wish discharge power was greater, because it takes a long time to storage-discharge at only 1.3a. Bigger chargers should be more powerful in this way.
12-17-2018 | 10:40 AM
#20
I wouldn't worry about charging at 1c to preserve battery life. ebuggy and etruggy already put a lot of stress on a 4s pack. In addition, you are taking life away from the pack if you are consistently pushing it to LVC.
With current racing batteries, charging at 3C+ should be no issue.
With current racing batteries, charging at 3C+ should be no issue.
12-17-2018 | 12:23 PM
#22
12-17-2018 | 12:24 PM
#23
Another thing to consider is that charge rate and charge time are not a linear relationship. The Lipo CC-CV charge algorithm tapers current through the last 15-20% of the charge so that that last part can take a while.
For a charger, look ultrapower. I believe they make chargers for several more mainstream brands (the UP120AC looks a great deal like one of Reedy's chargers). Now that you know the wattage you are looking for, you might find what you need there for much less $$ than some of the bigger-name brands. I have a UP100AC Duo. It's tiny, charges two 2s batteries at a time, as fast as I need and runs on AC power. I only wish discharge power was greater, because it takes a long time to storage-discharge at only 1.3a. Bigger chargers should be more powerful in this way.
For a charger, look ultrapower. I believe they make chargers for several more mainstream brands (the UP120AC looks a great deal like one of Reedy's chargers). Now that you know the wattage you are looking for, you might find what you need there for much less $$ than some of the bigger-name brands. I have a UP100AC Duo. It's tiny, charges two 2s batteries at a time, as fast as I need and runs on AC power. I only wish discharge power was greater, because it takes a long time to storage-discharge at only 1.3a. Bigger chargers should be more powerful in this way.
Thanks!
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