Did not find many who tried that so I thought I would ask here (tell me the truth but please go easy on me, it is my first build),
As the topic suggests I want to use a 6S LiFePo4 with a 190kv motor setup (is that too low of a voltage? Is that too low of a kv motor?) for my DIY board (which I laminated myself) and I want to have the ability to charge it using a BMS.
#BMS
I am trying to buy one on Bestech Power via e-mails but I am not sure this is how I should do it, their site offers no cart!
I was specifically looking at this item:
Battery Protection Circuit Module (PCM) for 19.2V 6 cells in series LiFePO4 Battery Packshttp://www.bestechpower.com/192v6spcmbmspcbforlifepo4batterypack/PCB-D092.html
By the way, BatterySupports do not even have any 6S LiFePo4 BMS whaaaat?
I need to add, that I intend to use the BMS for charging only and bypass the BMS for the load.
I also understood that I need it to have balanced charging functionality.
Since I am not sure if 6S is enough, I have a spare 3S battery (LiFePo4 of course, so it will fit the others) that means I would need a 9S BMS if I do decide to go that way. I do not suppose there is a way to use 9S BMS as a 6S BMS right?
#Charger
Also, I cannot find any LiFePo4 6S charger in any store that has international delivery.
Can anyone suggest anything please?
Is it important to have a specific LiFePo4 charger, or can I use, say, 6S LiPo charger instead? Its all about the voltage here right?
Same question here, for 9S I will need another charger right? Can’t go with a 9S charger and use, say, a voltage divider, right?
You’ve sent an email to the sales dept at Bestech. Now in a couple days they will contact you to initiate your order.
They will email you a spec sheet for approval, then you accept the settings or request any changes. Some settings are adjustable at the factory. They will also send you an invoice. You will send payment through Paypal.
If I will change the motor to 245KV instead of 190KV will I be able to use my 6S LiFePo4 battery?
I am in contact with Bestech Power who seem to have what I need 6S and 9S BMSes.
I would see if they have one with higher amp capability. 8a is very low.
It would be much better to get one you can discharge through and have short protection along with over current and over discharge protection.
This looks really good, how important it is to have the discharge go through the BMS, I see a lot of builders choosing to bypass the BMS on discharging
Charge only is compromise.
Charge and discharge is no compromise
Charge only is minimum protection
Charge and discharge is much more protection
Charge only is ok
Charge and discharge is best.
Plus,
If you get a charge only BMS, you will also need a HV E-switch that cost up to $60 + shipping
The price of this BMS is $50 + shipping
OMG, they want me to buy two of them because “They are not made by SMT”…
Any ideas, what I can do to make them sell me just one piece?
Maybe other suggestions for something that is made by SMT? whatever that means…
SMT surface mount technology
Every order at Bestech is a custom order because they give you options in the specifications that are very important and no other BMS maker gives you that. So their min order is 2. So you buy 2 and save one for a backup or a future build or sell it on the forum.
Or you buy a battery supports with no options and then spend the additional $60 for an external
e-switch that you will need since battery supports is a bare bones BMS.
Those are the ones.
When they send you a spec sheet for approval, you need to request your custom settings.
If you need help with that. I will help you later when I get home from work