You might have to make a state machine to prevent the oscillation. You balance it through the resistor for a while, stop, check the voltage, then discharge some more. It's a great idea, I've been unable to find a decet open source bms or tutorial for one online.
Do I understand it correctly that you are not able to charge in series while you are balancing? Because I think you are connecting all poles thogether to one common ground, so you are able to measure each cell relatively to that. I would like to build a battery pack where the balancer can be left attached while charging (which is supposed to happen continuously through solar cells)
No, you can charge the cells in series. What you are describing as a project is exactly what this BMS does. I plan to make it quite a bit better still as well as add more functionally to it.
my start of a bank is about 105-110 ah or so. I plan on it being matched as well as I can get it. I'm not sure how out of balance it will get. I need to balance a 7 series pack. would it be possible to go this route? I would like to have multiple stage or a variable balance load. could the pwm output of the arduind be used to vary the balance load ? I would like to have a visual on how its working. like a light bulb as part of the balance load. with the brightness or dimness. you could see the amount of balance load. if variable. would this be possible? I don't want a to buy batrium system. thanks ..
Using PWM as a way to vary the balance load could be an option. For a 7s pack you might have to go for an Arduino Mega to get enough pins, though it should scale. You could put a light bulb across the balance resistors instead of an LED like I have done if you want to see it working a bit better.
Hello, I am a Student at the California State Polytechnic University Pomona. Is there any way to talk to you about creating a protection board for a high power 3s6p battery pack using an arduino?
hey eman computer power supply with a boost inverter that has CC and CV can save alot of effort im doing that now with a 100A/h 18650 pack and it takes about 4 hours with 15 amps. but i have a 35 amp bms on each of the 3 packs. I get it if you just wanna tinker but a 15 amp boost converter and a computer power supply is working fine for me.
I intend on using a buck converter with this set up. The main thing it going to be getting the Arduino to balance the cells. I am mostly wanting to see what I can do with a setup like this. Where did you get your BMS?
Rock on here, please. Im hoping for a arduino balance system to. I need 7s for getting 24 volt to my camperbuss whit a 24 kw battery. Must find out first how not to fry the cells when i start up my generator which is 28v 450 a. ;-). Hope You find the sulition for this problem.
But BMS is not supposed to dissipate power but switch off the cell transistor when reaches certain voltage. It is actually a partial protection except it does not sense current limits but it can be added with overcurrent ICs. The best BMS and safest as I see would be one with simply high Amps relays - not transistors.
U can add OPAMP for monitoring reference voltages & add optocoupler for full isolation.
You might have to make a state machine to prevent the oscillation. You balance it through the resistor for a while, stop, check the voltage, then discharge some more. It's a great idea, I've been unable to find a decet open source bms or tutorial for one online.
Thanks, that will be probably be used in the next iteration of the code.
Where to get those boads for a regular Lead-Acid Battery Pack ?
Isn’t it possible to convert a 12-120 or 240 volt inverter into a fast charger? You c an find those things for around 15 bucks.
Can anyone tell the list of components used in this project?
great.. thanks, i subscribed u now will make my whole class to
Do I understand it correctly that you are not able to charge in series while you are balancing? Because I think you are connecting all poles thogether to one common ground, so you are able to measure each cell relatively to that. I would like to build a battery pack where the balancer can be left attached while charging (which is supposed to happen continuously through solar cells)
No, you can charge the cells in series. What you are describing as a project is exactly what this BMS does. I plan to make it quite a bit better still as well as add more functionally to it.
my start of a bank is about 105-110 ah or so. I plan on it being matched as well as I can get it. I'm not sure how out of balance it will get. I need to balance a 7 series pack. would it be possible to go this route? I would like to have multiple stage or a variable balance load. could the pwm output of the arduind be used to vary the balance load ? I would like to have a visual on how its working. like a light bulb as part of the balance load. with the brightness or dimness. you could see the amount of balance load. if variable. would this be possible? I don't want a to buy batrium system. thanks ..
Using PWM as a way to vary the balance load could be an option. For a 7s pack you might have to go for an Arduino Mega to get enough pins, though it should scale. You could put a light bulb across the balance resistors instead of an LED like I have done if you want to see it working a bit better.
Can anyone let me know all the components used in this project.
Can anyone please identify the components used in this project?
Hello, I am a Student at the California State Polytechnic University Pomona. Is there any way to talk to you about creating a protection board for a high power 3s6p battery pack using an arduino?
did you ever figure this out? Uni student from Australia whos been given a similar project and looking for previous designs to learn from!
hi do any updated bms video?
Yes 10 of them, they are on my channel.
hey eman computer power supply with a boost inverter that has CC and CV can save alot of effort im doing that now with a 100A/h 18650 pack and it takes about 4 hours with 15 amps. but i have a 35 amp bms on each of the 3 packs. I get it if you just wanna tinker but a 15 amp boost converter and a computer power supply is working fine for me.
I intend on using a buck converter with this set up. The main thing it going to be getting the Arduino to balance the cells. I am mostly wanting to see what I can do with a setup like this. Where did you get your BMS?
Rock on here, please. Im hoping for a arduino balance system to. I need 7s for getting 24 volt to my camperbuss whit a 24 kw battery. Must find out first how not to fry the cells when i start up my generator which is 28v 450 a. ;-). Hope You find the sulition for this problem.
But BMS is not supposed to dissipate power but switch off the cell transistor when reaches certain voltage. It is actually a partial protection except it does not sense current limits but it can be added with overcurrent ICs. The best BMS and safest as I see would be one with simply high Amps relays - not transistors.
try a due