Excelente video muy didáctico, tengo una duda acerca de este bms, posee protección contra cortocircuito? eso no me queda claro? muchas gracias por la ayuda.
@@DaftOldMan Que decepcion, lo has podido comprobar? , pensé que si tenía protección de corto como los bms de color verde. muchas gracias por la ayuda muy agradecido por la atención.
Are you trying overcharge protection when use p- as charge and load? I think whe you use the same port the bms will draw only 60amps current and if you use the seperate port bms will draw 100amps. So the best choise is use seperate port connection. But maybe you doesnt need overcharge protection when the voltage from your power supply/adapter is same voltage with maximum battery voltage and you sure the voltage will not increase to higher than maximum battery voltage.
Hi, i have a 3S model and must connect 4pack (serial) from 8 18650 battery. The 4 pack connect in parallel . Do you have a schema for the connect pack ? Do you have a schema for modify Bms 3s ? Tank you
I think you have done a great job in teaching in this video. But, it is hard to believe you should use -P for charging the 5S 100A li-ion battery as well as using it to power your drill. It seems to me the designed way of connecting is with the -C to charge the battery and -P to power whatever your load. So, I am almost completed with wiring this same BMS 5S 100A BMS and will let you know how it works after connecting it as it is designed.
Hi I'm using the same bms customised for 3s 12.6 v battery. It charge well from P- as shown in ur video. Thanks But the bms don't disconnect the charging after reaching 12.6v I tried to check it did not disconnect even after 13v And no LED is lighting. What could be the problem?? Please help.
The charging protection will not trigger because you use "P-" as charging , use the "C-" as charging port Or better use common port "C-" as your charging and discharging output
@@billyf.4408 "C" will not work as the discharge port. You cannot get full power out of "C" Charge protection seems to work as the led's on the board go on and off and the batteries seem to stay balanced but they may just be because they are good quality batteries.
Do you have the datasheet link, I don't understand how the bms could understand if this is li-on battery or li-po battery as this bms offers both support. Or if you could make a video on bms connection using lipo4 battry 4s system...!
Hello friend "Daft old man" I just followed your diagram (scheme) of how to connect the BMS in P(-) and I did so... but the drill (DeWalt 18V) fails just like yours did, it loses power and turns off. Before my cell pack "had no BMS" and it worked much better. Note in both cases I am using recycled cells from laptop batteries What could be this question is also for who helped you...(BavarianSuperGuy) Thanks and regards The battery stopped working at 16.1 V and I am charging it up to 20.5 V
Check you wiring carefully. I have used this method with 2 batteries and both are working well. It is easy to damage the BMS when soldering. I have one dead BMS board because of an accidental short circuit.
@@DaftOldMan Thanks for answering How to know if the BMS is bad due to a short circuit? In the BMS after soldering the cells I checked the voltage in the BMS at each point: B1(4.1v),B2(8.2v),B3(12.3v) ,B4(16.4v) and B+(20.5v) and all good
Your problem is most likely that the laptop cells are not good for high current, power tools require high current cells at least 20amp. laptop cells will most likely be 5amp
@@DaftOldMan Of course charging and discharging works, Overcharching protection is not working.Your charger can't measure the individual cell voltage. There is a high risk to destroy the cells after some time. You are not using C- ,so you are not using the charging mosfets switch. The BMS can't stop the charging in case of a cell overvoltage.
@@DimitriosLazaridis The charge leds light up and go off when fully charged. I thought that meant cells were balance charged. I can change it to charge via C- if you say that is better.
@@DaftOldMan The leds are not there to Indicate charging ,They are indicating balancing action. In fact, if they are off,that is an indication of good balanced cells. You can use P- or C- or both, but if you use only P- you dont have overcharging protection for the individual cells. You need to charge via C- in order to have the overcharging protection.
@@DimitriosLazaridis Thank you very much for your help. The information from the seller was to charge and discharge from C-. I now see that we must charge at C- and discharge at P-. I wish the Chinese seller had told me this. I don't know if you use these 100 amp 5S BMS but I am finding a problem with both of mine. Sometimes one or two cells will discharge themselves when the battery is not being used.
It still requires a bit more explanations. 1. If BMS works perfectly why is there C-. 2. Did you tested cut off discharge voltage? 3. Did you tested cut off charge voltage?
C- is for charging but I charge through P- and that works ok for me. Battery charges to 21v cut off but charger cuts at 21v too. I did not measure discharge voltage because I never use it. I recharge when drill feels slower. Thanks for commenting
@@DaftOldMan The thing is, you never had discharge cut off, you stop using when "drill feels slower". Hopefully it is ok, but I will try to test it, I am making conversion same battery to Li too. I will connect to C- and see what is going on.
@@DaftOldMan hi I was thinking to convert my old Ryobi battery whit this BMS but my only question is is it really can work true one connection charging and discharging if yes than I can use the original tool battery charger from Ryobi
isnt c- for charging? i didnt have much luck with this board. it just discharged the batteries, and the output also failed. i thought i wired it up ok. i fed it 23.2vdc ..here's a link to a picture. www.dropbox.com/s/rzodr2b45d5i75l/2022-07-26%2021.17.01.jpg?dl=0
Now we are talking. The man speaks and he is really good explaining stuff.
Thank you so much Sir. I can see clearly now
This is the best video I ever saw about it
Thank you for commenting
Very, very clear and well explain. thanks a lots Sir. God bless! and keep up the good work and sharing your knowledge to other viewers.
Thank you for commenting.
Nice to see it running at full power.
It is strange how every set of instructions I found said to connect to C- when it should be P-
Great video man. Worked perfectly! Thanks...
Thank you for commenting.
Excelente video👍👍
Thank you
Excelente video muy didáctico, tengo una duda acerca de este bms, posee protección contra cortocircuito? eso no me queda claro? muchas gracias por la ayuda.
No. No tiene protección contra cortocircuitos. Este BMS no es muy fiable a largo plazo.
@@DaftOldMan Que decepcion, lo has podido comprobar? , pensé que si tenía protección de corto como los bms de color verde. muchas gracias por la ayuda muy agradecido por la atención.
Thanks for the info! What voltage is your screw gun rated? Mine is 18v. Do i use same setup?
5s BMS is 18v - 21v. So this is what you need for 18v drill/driver
@@DaftOldMandoesn’t 21v exceed manufacturer recommendations for the drill motor?
@@AlexHorwatt No. Electric motors have a wide voltage tolerance rating.
What thickness nickel strips are you using ? I have issues with The nickel strip not able to supply enough current
8mm x 0.2mm according to my calipers.
Are you trying overcharge protection when use p- as charge and load? I think whe you use the same port the bms will draw only 60amps current and if you use the seperate port bms will draw 100amps. So the best choise is use seperate port connection. But maybe you doesnt need overcharge protection when the voltage from your power supply/adapter is same voltage with maximum battery voltage and you sure the voltage will not increase to higher than maximum battery voltage.
Fajnie wyjaśnione.
Proszę jeszcze wyjaśnić, jak podłączyć 3, lub 4s.
Thank you very much !!! I Though my board was defective.
Bavarian super guy is the real hero.
Hi, i have a 3S model and must connect 4pack (serial) from 8 18650 battery. The 4 pack connect in parallel . Do you have a schema for the connect pack ? Do you have a schema for modify Bms 3s ? Tank you
Sorry. I have not tried 4s.
I think you have done a great job in teaching in this video. But, it is hard to believe you should use -P for charging the 5S 100A li-ion battery as well as using it to power your drill.
It seems to me the designed way of connecting is with the -C to charge the battery and -P to power whatever your load. So, I am almost completed with wiring this same BMS 5S 100A BMS and will let you know how it works after connecting it as it is designed.
Thanks for commenting. The charge part was never an issue for me. The problem I always had was with power out.
Where should i connect the charger??
So...charge AND discharge from the same connections?
Yes. You can charge via C- if you want but charge by P- works fine.
How many amperes should the charger be for connecting to the bms?
I do not think it matters because the board should limit the current supply to the batteries.
Can i joint this BMS (c- & p-) for ground together 3s battery for bike ?
because bike have only one wire for charge and discharge...
Thank you for commenting. Do not joint the wires together. Charge through the discharge (P-) connection.
@@DaftOldMan
Thanks.
Your meaning Only one (P-) use for charge and discharge.
Am i right?
@@yasirarfat1764 Yes.
@@DaftOldMan thanks for your help...
@@DaftOldMan One and last think ...
on (P-) charging bms can auto cut-off charging when battery is full? and short circuit protection working?
Hi
I'm using the same bms customised for 3s 12.6 v battery.
It charge well from P- as shown in ur video. Thanks
But the bms don't disconnect the charging after reaching 12.6v
I tried to check
it did not disconnect even after 13v
And no LED is lighting.
What could be the problem??
Please help.
I have not tried 3s configuration. If I have a spare bms I will try it.
The charging protection will not trigger because you use "P-" as charging , use the "C-" as charging port
Or better use common port "C-" as your charging and discharging output
@@billyf.4408 "C" will not work as the discharge port. You cannot get full power out of "C" Charge protection seems to work as the led's on the board go on and off and the batteries seem to stay balanced but they may just be because they are good quality batteries.
Do you have the datasheet link, I don't understand how the bms could understand if this is li-on battery or li-po battery as this bms offers both support. Or if you could make a video on bms connection using lipo4 battry 4s system...!
When I bough my circuit boards the seller had two types. 1. Li-Ion and 2. Li-Po. I do not know how you can use one board for both types.
@@DaftOldMan oh, ok but how do differentiate between those, which one is for lipo4 and which one is for lion
Hello friend "Daft old man" I just followed your diagram (scheme) of how to connect the BMS in P(-) and I did so... but the drill (DeWalt 18V) fails just like yours did, it loses power and turns off.
Before my cell pack "had no BMS" and it worked much better.
Note in both cases I am using recycled cells from laptop batteries
What could be this question is also for who helped you...(BavarianSuperGuy)
Thanks and regards
The battery stopped working at 16.1 V and I am charging it up to 20.5 V
Check you wiring carefully. I have used this method with 2 batteries and both are working well. It is easy to damage the BMS when soldering. I have one dead BMS board because of an accidental short circuit.
@@DaftOldMan Thanks for answering
How to know if the BMS is bad due to a short circuit?
In the BMS after soldering the cells I checked the voltage in the BMS at each point:
B1(4.1v),B2(8.2v),B3(12.3v) ,B4(16.4v) and B+(20.5v) and all good
Your problem is most likely that the laptop cells are not good for high current, power tools require high current cells at least 20amp. laptop cells will most likely be 5amp
By using this connection ,there is no overcharging voltage and current protection.
The charge and discharge control work perfectly.
@@DaftOldMan Of course charging and discharging works, Overcharching protection
is not working.Your charger can't measure the individual cell voltage. There is a high risk to destroy the cells after some time.
You are not using C- ,so you are not using the charging mosfets switch. The BMS can't
stop the charging in case of a cell overvoltage.
@@DimitriosLazaridis The charge leds light up and go off when fully charged. I thought that meant cells were balance charged. I can change it to charge via C- if you say that is better.
@@DaftOldMan The leds are not there to
Indicate charging ,They are indicating balancing action.
In fact, if they are off,that is an indication of good balanced cells.
You can use P- or C- or both, but if you use
only P- you dont have overcharging protection for the individual cells.
You need to charge via C- in order to have
the overcharging protection.
@@DimitriosLazaridis Thank you very much for your help. The information from the seller was to charge and discharge from C-. I now see that we must charge at C- and discharge at P-. I wish the Chinese seller had told me this. I don't know if you use these 100 amp 5S BMS but I am finding a problem with both of mine. Sometimes one or two cells will discharge themselves when the battery is not being used.
It still requires a bit more explanations. 1. If BMS works perfectly why is there C-. 2. Did you tested cut off discharge voltage? 3. Did you tested cut off charge voltage?
C- is for charging but I charge through P- and that works ok for me. Battery charges to 21v cut off but charger cuts at 21v too. I did not measure discharge voltage because I never use it. I recharge when drill feels slower. Thanks for commenting
@@DaftOldMan The thing is, you never had discharge cut off, you stop using when "drill feels slower". Hopefully it is ok, but I will try to test it, I am making conversion same battery to Li too. I will connect to C- and see what is going on.
@@tesladude2822 Great. Good luck with testing.
@@DaftOldMan hi I was thinking to convert my old Ryobi battery whit this BMS but my only question is is it really can work true one connection charging and discharging if yes than I can use the original tool battery charger from Ryobi
@@adamcsucs193 The original Ryobi charger did not work for me.
isnt c- for charging? i didnt have much luck with this board. it just discharged the batteries, and the output also failed. i thought i wired it up ok. i fed it 23.2vdc ..here's a link to a picture. www.dropbox.com/s/rzodr2b45d5i75l/2022-07-26%2021.17.01.jpg?dl=0