₦airaland Forum

ajabani4allah:
Pls can you give more details on how to go about setting the current?

officialfestus:
good morning boss.
If a regular car battery charger can fully charge a lithium ion battery with bms installed without any issues. Then a normal inverter of 24v should be able to charge a 24v 7s battery without issues also?

Cc dollarnaira ewizard1

olaztek:
It's easy to set operating current of a buck converter if the load is resistive / inductive such as a led bulb or motor, but for a battery, it's quite tricky.

The constant current provided by the buck changes in tandem with the battery voltage level. If the battery is low let's say at 10.5v, the buck will deliver a high constant current. As the battery is nearing full charge @ around 12v, the buck delivers a low constant current.

For simplicity sake, just tweak the current trimmer clockwise to the max level till you start hearing some clicks from the trimmer, set your charging voltage, and put a cooling fan above your buck converter to prevent damage from overheating.

Doing this will not make your buck converter to burn out irrespective of the solar power rating supplied to it.

Penuelseun:
Yes it should charge it so far the charge voltage does not exceed 29v for 7s system. You will also need to disable the equalization setting if your inverter comes with such. Inverters with editable charge settings are the best

olaztek:
Lithium ion batteries are very sensitive and requires cc/cv source to charge them safely. A car battery charger does not have the cc/cv function and therefore risky to charge lithium ion batteries.

Many manufacturers are now integrating Lithium charging profile into their charge controllers and inverters to accomodate Lithium battery.

Be careful with Lithium ion battery as any wrong charger or Inverter not designed for it can cause thermal runaway in the battery pack thereby leading to fire and loss of property. Do not solely rely on your bms for maximum protection as it can fail like every other electronics.


And note Lithium fire is difficult to extinguish because it has its own special type of fire extinguisher.

olaztek:
It's easy to set operating current of a buck converter if the load is resistive / inductive such as a led bulb or motor, but for a battery, it's quite tricky.

The constant current provided by the buck changes in tandem with the battery voltage level. If the battery is low let's say at 10.5v, the buck will deliver a high constant current. As the battery is nearing full charge @ around 12v, the buck delivers a low constant current.

For simplicity sake, just tweak the current trimmer clockwise to the max level till you start hearing some clicks from the trimmer, set your charging voltage, and put a cooling fan above your buck converter to prevent damage from overheating.

Doing this will not make your buck converter to burn out irrespective of the solar power rating supplied to it.

Obviouslyblunt:
How much can I pay for an already constructed 100ah 24v lifepo4 battery with everything I need to use it with a 1.5kva 24v inverter?

Penuelseun:
use AC and DC SPDs

odimbannamdi:
Baba, please can you share recommendations of these AC and DC SPDs?

Penuelseun:
Recommendations as how?

odimbannamdi:
Às per spec, size (based on components of the installation, I believe) and even brand, if possible

Penuelseun:
you can use a laptop charger connected to a buck converter for that, or get a cctv power pack like this

okikigsm:
Run one or two basic test on it and use it .don't let that discourage u.start with what u have now.your experience on it will be your guide and be advantage later,u will still use Premium batteries in future build bro.

officialfestus:
my salvaged laptop cells are doing excellently well.
Akseph1

okikigsm:
See what I have so far and yet we still dey manage buy second grade small small

officialfestus:
It seems no one is building at the moment, I'm just waiting for my goods to arrive from aliexpress.

Obnoxious2001:
I am building a student power bank.
Am considering running 12v or just 3.7 with power bank module...

So I need pratical experience on this
Does the BMS below cut off the battery once it is low?


The person requested for a 50000mah Mobile phone charger anyway

officialfestus:
yes it does.

Obnoxious2001:
I am building a student power bank.
Am considering running 12v or just 3.7 with power bank module...

So I need pratical experience on this
Does the BMS below cut off the battery once it is low?


The person requested for a 50000mah Mobile phone charger anyway

officialfestus:
My spot welder just arrived.
Awaiting nickel strip.

okikigsm:
Congrat bro.i bought mine 4yrs ago but now my bro na real copper wire I dey use o.e plenty for ground here diff sizes.

Spot.welder + quality nickel strip= neat job.

Valto:
will be building soon a 12v 100ah lithium battery , with 500w pure sine wave inverter, 20A charger and 60A PWM CC, all inbuilt.

Valto:
will be building soon a 12v 100ah lithium battery , with 500w pure sine wave inverter, 20A charger and 60A PWM CC, all inbuilt. with automatic changeover to utility source, once utility becomes available.

Valto:
will be building soon a 12v 100ah lithium battery , with 500w pure sine wave inverter, 20A charger and 60A PWM CC, all inbuilt. with automatic changeover to utility source, once utility becomes available.