Hello, for hybrid or nimh batteries to work for many years, they require passive and permanent balancing due to their low cell tension, they will not be the same. This is solved by connecting a shunt zener diode with its current limiting resistor. It balances all the cells at the same voltage. It is not perfect and a small percentage of capacity is lost, but it is better than a dead battery after 3 years. This method is highly effective, reliable and easy to integrate, achieving triple the useful life of a battery.
Zener diode...i think i will try that for my 2 lead acid truck batteries; it's a 24 volts (12 V X 2 ) solar setup; while charging at 28.8 volts, one always goes to 15 volts ~~ and the other one down to 13.8, but alternatively, depending on which one i connect a 0.12 Amp, 12 volt cooling fan.
Saw another video where he charged a few cells, not the whole unit. He wrapped the units in two large boards, and then clamped them together to maintain their shape.
1. The cells are designed to have side pressure on them while charging. 2. These cells need to be charged at C/3 rate if you want to stay with the manufacturer's specifications and get near the rated 6.5 A/hrs from them. Research shows a C/1 rate will give you 5.4 A/hrs. 3. Temperature needs to be monitored even at C/3 rates to ensure battery expansion with high internal pressures won't occur. avt.inl.gov/sites/default/files/pdf/hev/batteryprius1052.pdf 4. These batteries need a BMS for balancing, 0.1 will create problems and kill cells.
Did you put a charge controller box between the solar panels and the batteries before charging them? If not then you will definitely overcharge them and they will expand or even explode and be ruined. Solar panels are powerful lol…
Not a good idea.NiMH can't be paralleled due to the full charge voltage characteristics. NiMH cells experience a voltage drop when they are fully charged. If you parallel NiMH cells and one of the groups hits full charge, it's voltage drops. Thus ALL current from the charger and ALL parallel cells start dumping their current into the already full cell. As it heats, it's voltage drops further. This is called thermal runaway. The process stops when the cell ruptures or shorts.
I am not very smart when it comes to this type of stuff but when we where charging the battery it gave off like these small clicking sounds and it exploded three times and secreted the acid inside and lent out smoke too. Honestly I was so fricking scared man that I threw water on it during the panic,was that a good choice or not man ? I got no idea ?
Are these batteries safe to have in a ventilated workshop , I would be charging them from an ecoflow delta , the delta has 1500 watts of solar panels on it and on a sunny day is full by lunchtime , Rotorua
Oh nice! I got mine when I upgraded the battery in my own car, but search on marketplace, there are usually some for sale. Make sure they are clamped together as they can expand while charging.
so you know you dont have to get rid of the 6.xxv battery just balance them its easy just to have them balance out it should take about 24-48 hrs all + and all - one side
Hello, for hybrid or nimh batteries to work for many years, they require passive and permanent balancing due to their low cell tension, they will not be the same. This is solved by connecting a shunt zener diode with its current limiting resistor. It balances all the cells at the same voltage. It is not perfect and a small percentage of capacity is lost, but it is better than a dead battery after 3 years. This method is highly effective, reliable and easy to integrate, achieving triple the useful life of a battery.
Zener diode...i think i will try that for my 2 lead acid truck batteries; it's a 24 volts (12 V X 2 ) solar setup; while charging at 28.8 volts, one always goes to 15 volts ~~ and the other one down to 13.8, but alternatively, depending on which one i connect a 0.12 Amp, 12 volt cooling fan.
Same for lithium ?
@@camjones1106yes
Saw another video where he charged a few cells, not the whole unit. He wrapped the units in two large boards, and then clamped them together to maintain their shape.
Thats a good idea. They really arent structural by themselves.
G'day mate, could you please make more content about this battery
1. The cells are designed to have side pressure on them while charging. 2. These cells need to be charged at C/3 rate if you want to stay with the manufacturer's specifications and get near the rated 6.5 A/hrs from them. Research shows a C/1 rate will give you 5.4 A/hrs. 3. Temperature needs to be monitored even at C/3 rates to ensure battery expansion with high internal pressures won't occur. avt.inl.gov/sites/default/files/pdf/hev/batteryprius1052.pdf 4. These batteries need a BMS for balancing, 0.1 will create problems and kill cells.
Oh yeah the expanding is dangerous if not recharged correctly.
@@KiwiMaker one of the world's largest manuf (germany) specifies in their repair manual 0.01 volt max tolerance; but they are lifepo4
Thanks! I followed your plan & it's working! Notwithstanding, how useful is the pack in terms of usable power?
Did you put a charge controller box between the solar panels and the batteries before charging them?
If not then you will definitely overcharge them and they will expand or even explode and be ruined.
Solar panels are powerful lol…
They self discharge.. and do not like being max voltage. They only like being 60 to 70% charged. And have to have a regulator.
and they don't like being parallelled
Not a good idea.NiMH can't be paralleled due to the full charge voltage characteristics. NiMH cells experience a voltage drop when they are fully charged. If you parallel NiMH cells and one of the groups hits full charge, it's voltage drops. Thus ALL current from the charger and ALL parallel cells start dumping their current into the already full cell. As it heats, it's voltage drops further. This is called thermal runaway. The process stops when the cell ruptures or shorts.
I am not very smart when it comes to this type of stuff but when we where charging the battery it gave off like these small clicking sounds and it exploded three times and secreted the acid inside and lent out smoke too.
Honestly I was so fricking scared man that I threw water on it during the panic,was that a good choice or not man ? I got no idea ?
They need to operate being pressed together, don't use, charge them lose.
How did it work out after it was charged ?
Are these batteries safe to have in a ventilated workshop , I would be charging them from an ecoflow delta , the delta has 1500 watts of solar panels on it and on a sunny day is full by lunchtime , Rotorua
Im not sure, they did come with a vent tube manifold connected to each battery. you may be able to vent that tube outside.
Use them for ebike?
What is he doing?
if you add them all in parallel you get 7.5 volts in the end?
Yes. It would be a good welder at those currents 😄
How many watts can they deliver?
One module around 40w
One module around 40w
One module around 40w
can some one give me the amp hr for 12 and 24 also the amps on group of 6 cells. thank you
how can i make it a 12v
Clean all the copper connections in between the cells.
in new zealand as well, where can one find these batteries ?
Oh nice! I got mine when I upgraded the battery in my own car, but search on marketplace, there are usually some for sale. Make sure they are clamped together as they can expand while charging.
Plenty on trademe. Or talk to the guys that replace them.
any idea how many amp hours each cell is?
On line there's a listing it says 4000_4500 mah
so you know you dont have to get rid of the 6.xxv battery just balance them its easy just to have them balance out it should take about 24-48 hrs all + and all - one side
Very nice