2hotty
1 mW
As the Hub Motor Turns and the LiPo Fire Burns.
Several weeks ago, my 15 amp 900-watt 13S Lithium-ion charger blew a capacitor. First, I checked the fuse and was good. I then called an electronics repair shop and asked them what would make a pop sound and was told a capacitor.
I was charging 18 Ah Lishen LTO batteries. They can handle even more than 15 amps and if you did not know discharge > 400 amps without damage.
I put them on time out in a storage unit until yesterday when I was cleaning my stuff out of my wife's storage to bring to mine and got an idea. Typically, 2.5-amp LTO cells are rated for 2.8-amp maximum charging voltage. At 20S a 13S 54.V Lion charger will charge each cell to 2.73V. 54.6 / 20 = 2.73.
So how am I charging them with 6S - Lipo chargers? Very simple. I charge each 10S pack with 6S LiPo chargers. I simply charge 9 cells at 25.2V. The 6S LiPo setting. That is 2.8V per cell as 25.2 / 9 = 2.8. I charge at 4 amps as the active balancer is a 5 amp. I don't need to worry about cell #10 as the active balancer will charge it. That is right. I can charge all 10 to close to 28V with 25.2V input.
The multimeter is hooked to cell #10 and was at 3.6V when I started and is now at 3.63. Cell #9 is at 3.66 but 5 amp active balancers only work at around 5 amps when there is a greater difference in voltage like 1V. They work at milliamps when the voltage difference is < 0.5V. After charging the 9 cells to 2.8V I will unhook the chargers and hook both 10S packs in parallel and check voltage on each cell tomorrow.
Thanks. LC out.
Several weeks ago, my 15 amp 900-watt 13S Lithium-ion charger blew a capacitor. First, I checked the fuse and was good. I then called an electronics repair shop and asked them what would make a pop sound and was told a capacitor.
I was charging 18 Ah Lishen LTO batteries. They can handle even more than 15 amps and if you did not know discharge > 400 amps without damage.
I put them on time out in a storage unit until yesterday when I was cleaning my stuff out of my wife's storage to bring to mine and got an idea. Typically, 2.5-amp LTO cells are rated for 2.8-amp maximum charging voltage. At 20S a 13S 54.V Lion charger will charge each cell to 2.73V. 54.6 / 20 = 2.73.
So how am I charging them with 6S - Lipo chargers? Very simple. I charge each 10S pack with 6S LiPo chargers. I simply charge 9 cells at 25.2V. The 6S LiPo setting. That is 2.8V per cell as 25.2 / 9 = 2.8. I charge at 4 amps as the active balancer is a 5 amp. I don't need to worry about cell #10 as the active balancer will charge it. That is right. I can charge all 10 to close to 28V with 25.2V input.
The multimeter is hooked to cell #10 and was at 3.6V when I started and is now at 3.63. Cell #9 is at 3.66 but 5 amp active balancers only work at around 5 amps when there is a greater difference in voltage like 1V. They work at milliamps when the voltage difference is < 0.5V. After charging the 9 cells to 2.8V I will unhook the chargers and hook both 10S packs in parallel and check voltage on each cell tomorrow.
Thanks. LC out.
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