Recent content by perra

Hi Per.Yes Im in Stockolm, Upplans väsby. Thanks for the tip, I will check out ev-power.eu. /Per-Arne

Is there a really good reliable Lifepo4 battery available in EU? I'm through beeing ripped of by China. My last battery suppose to be 60Ah capacity, but in reality its 25. It was probably not even lifepo4. The battery is for my e-skooter. Thanks for any reliable tip!

I paid about $900 for the battery. Here is the advert on Aliexpress: 48V 60AH Lithium Battery Pack , 54.6V 2500W Electric bicycle Scooter solar energy Battery , Free BMS Charger Shipping http://s.aliexpress.com/Zn26NZrE (from AliExpress Android)

I got some details on the battery: Battery internal use 13S 20P 2850mah =260 PCS Cell, So each CELL weight is 40g *260 PCS=10.4 kg ( Coupled with BMS system and battery insulation material tape weight ... ) Does this describe a 60Ah 48v battery pack?

This was 48v battery pack, for 2500w power.

I bought a new lifepo4 battery, its capacity was promised to be 60 Ah. When testing it I was disapointed with its performance. The weight of the battery is 15 kg. My old 40Ah battery is about 20 kg. Is it even possible today to produce a 60 Ah lifepo4 battery pack with a weight of 15 kg?

Well, end of the line for this battery. Lessons learned; avoid complete discharge and measure each cell first, before starting fixing anything. My new battery got installed today. Its custom size enabled a larger 60Ah battery. My range should increase to over 100 kilometers. Thanks all you...

I must have missed cell #3 before, it seems almost dead.

Here are voltage for each battery cell: 1 3.33v 2 3.33v 3 0.02v 4 3.36v 5 3.33v 6 3.28v 7 3.37v 8 3.33v 9 3.33v 10 3.32v 11 3.33v 12 3.29v 13 3.4v 14 3.00v 15 3.6v 16 3.4v

Each cell seems ok with about 3.1 to 3.2 volts. So I need a special slow charger? Is there a charger that use 1.2A, or is it a charger that you can set ampere level?

Well, there is nothing wrong with the BMS. The voltage on each cell is also fine. The battery has been completly discharged. This is maybe the fourth time the battery has been completly discharged. So my focus now is the issue of charging a completly discharged battery, this seems to be an...

One fault there, wires to connect : Wire A to P- (load) Wire B to C- (charger 48v) Wire C to B- (power control)

OK, wires to connect : Wire A to P- (load) Wire B to C- (charger 48v) Wire C to P- (power control) Red signal wire is Battery+ Signal wires to battery cells So what can go wrong :)

The signal wires are also tricky. Picture below is the signal wires from the battery. This picture is the ports for the signal wires. So they are not the same connectors, which wire from battery is battery plus?