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Low Voltage and Over charge cut off protection for every Li-Ion battery using cheapy BMS for 1$
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- Опубликовано: 4 мар 2023
- #ErCanEverything #Battery #Protection
🪫⚡🔋In this video I will show you how to trick a BMS from Aliexpress to work on any device without series Li-Ion connected batteries
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Great job! I actually tested the same idea two months ago, but with a different BMS. I ordered the same BMS as you did to put into "production". I also used different resistors for R1 (lower) and R2 (higher) so that the BMS senses a higher/lower voltage on the first/second cell. This approach is useful for cutting off charging/discharging earlier and avoiding battery stress in low-current applications.
Thank you my Friend🙂🤝
I've been going crazy looking for a module that works like this, but they keep coming up with relays and huge sizes, so I decided to try this method.
How come they didn't make such a simple module and we wouldn't experiment🤷
I'm still learning, would you be able to make a video using these? So I can understand how they work in this scenario?
Thanks for sharing this improvement. Can you pls let us know what R1 and R2 values you used? Thanks.
Can you pls let us know what R1 and R2 values you used? Thanks.
@@z0lt4nlook up the low voltage cut off of your board, decide at which voltage you want your cut off and then adjust the voltage divider to match your specifications. V_single_cell_cutoff=R2/(R2+4*R1)*V_parkside_cutoff
Lol? I have recently bought this circuit, but decided to use Parkside batteries instead of individual batteries. Now, I will be able to use it, I just have to buy resistors 👍
Excellent video with an elegant low-voltage cutoff solution! Question: if I want a different cutoff voltage (ex. 15v, 15.5v), do I just change the resistor values, and if so how do I calculate what resistor values I will need?
The resistors are only to simulate the voltage of each cell. A BMS monitors each cell, but in this case this feature isn't needed. A liion cell can be discharged to 2.5 v without damaging it so 14.x v is safe.
Thankyou, this is the perfect solution for an upcoming project
Two questions
1 - After the BMS cuts power to the load is it still drawing any power (no matter how small) from the battery (i.e. to monitor the voltage or other function)?
2 - Is there a way to adjust the cut off low voltage, I would like it a bit higher than the solution presented here to make sure the batteries are well protected and don't mind sacrificing a little run time for this?
Super helpful build and guide, thanks in advance
1. Yes. Even if the BMS cuts power completely, you still have the 5x 3.3k resistors connected between B+ and B- at all times. That's 16.5kOhms. At 14.7v it draws 891uA(assuming 0% tolerance in the resistors) or 13mW.
It'd use AT LEAST 10k resistors for the divider ladder. They're good for pullup and pulldown in logic circuits so they should be good here. That's 50kOhm and only 294uA at 14.7v or 4.3mW. And if that works I'd try even larger ohm resistors to minimize that power draw.
2. I have no idea. Look up the main chip name and specsheet for it. I guess you can set the cutoff voltage with a resistor (one of those smd ones around the chip) so you'd have swap it to change the cutoff voltage(pretty much impossible without a hot air station and a microscope)
Welchen Widerstand hast Du bei dem Parkside Verbraucher verlötet?
BEWARE of using parkside batteries on other tools, all 20v parkside tools have a bms and cell balancing, BUT it does not test or prevent over discharge, if you over discharge a parkside battery, the protection chip in the battery will lock out the battery forever! it will not send 'handshake' to charger. its a safety feature of the bms IC to protect us from fire, not to increase company profit..
also recharging cells will not unlock it, I have tried many parkside boards etc as I built a full 50mph+ e-motorcycle from parkside cells.
Hi. Nice. its important use 3.3 kOhm or it can be other? Example 2 kOhm?
Hi, I think it will work but if the resistances are very low it will drain the battery.🙂
@@ErCanEverything Thank you. Used 10 kOhm resistors with 1% acuracity.
The video is very useful. I have tried following this and got results by trying to do it in 3 cells.
Is it possible to use the same 18650 BMS with a solar panel, for example using a 5-cell BMS with a 18 volt solar panel?
If you would like to help, please make a clip of this project next time. Thank you in advance.
correct me if i'm wrong but if we put this in battery pack we will not by able to charge on original charger...need to put it inside the adapter or tool casing....no battery draineg to.....???
Thank you for a great project. I am running to strange problems with this solution. I have same BMS board with resistors soldered on to it. I am using the regulated DC-DC converter (ZK-4KX) to imitate the battery voltage going down and H4 bulb as a load connected to P+/P- pins. Even when I decrease the input voltage to 10V the bulb is still on. Where might be the problem than?
It has no balancing function right?
I have an old Honda ct90 motorcycle with a 160cc kick start engine. I use a very small motorcycle battery and stator just to run a headlight, taillight, and blinker. All are LED and the point of the battery is to keep the volts constant otherwise lights flicker. Can I use this setup hooked up to my bikes voltage regulator and stator to charge a 12v DeWalt lithium battery? I tinker and can follow plans to build stuff but design and engineering are above my head. Can you help me if this is doable? Another reason I want to do this is that the drill batteries are cheaper and some are rated better than the current little acid battery I have now that needs replaced.
I have a few of these. Will it work for 24v battery?
Спасибо за ваш фильм! Поправьте если не понял, для предотвращения глубокого разряда достаточно припаять резисторы?
Awesome trick! By this way we can fake BMS, and use as much cells as we want 🤩
Thanks for sharing this knowledge with us Brother ✌️
Where you buy adapter for parkside? What name it is.
I dont think you necessarily need 3.3k resistors. You probably can use different values. Only all the resistors need to have the same value.
I'd use 10k's so it drains the battery less.
Great job and video! I have already ordered via your referral link :-) Do you know the limit of maximum long term amperage? I intend to use this solution to keep Parkside battery safe on my sons electric motorcycle. (36V - 2x 18V 4ah dumb batteries or 2x 8ah 18V smart batteries (those may not need discharge protection due to limit setup in the application).
Very useful project 😉
I've been looking for something like this for a long time, but they come with relays that won't work for me and I decided to experiment a bit🙂🤝
Super awesome 👏 👍
Thank you my Friend🙏🙂🤝🤝🤝
Hello,
Thank you for your share. I have a question:
What kind of lamp? How it work?
Thank you.
Hello,
The lamp is an H1 and its role is to imitate a fast discharging or charging battery so I can quickly show you how this module works. 🙂
@@ErCanEverything Thank you.
- The lamp 12V.
- The battery out is 20V.
So the lamp does not ligting when connected to battery 20V, the lamp begin lighting when to voltage (of battery) slow down to 12V.
Is that right?
@@nguyenanhduy7130 Not so, I connected the lamp in series and when I don't load with the impact wrench it doesn't light up.
But when I press the button, current starts flowing through the lamp and it lights up. Imagine that I use the lamp as a fuse, but it has a much higher resistance, so it simulates that the battery voltage has really dropped to a level to turn on the protection.🙂
Is that bms a 5 s?
Hello friend. Please, could you help me? Can you tell me why the parkside 20XTEAM battery charge indicator LED is always on? Thank you for your precious help. compliments
The button or small 3-indicator circuit board may be wet and oxidized🤔
DOES every BMS have this function??
Me parecen unos videos muy interesantes. Aunque no entiendo porque utilizas el BMS 5S y no un 4S o 3S, por poner un ejemplo? y las resistencias todas de 3k3? He leído los comentarios pero sigo perdido.
La batería del taladro que usa tiene 5 celdas en serie, por eso usa un BMS 5S. Si usará otro tipo, no coincidirían las tensiones
Thank you very much man for this great idea. Is it possible to make one for 12v charging circuit. I will really appreciate that if you could help me
You need to buy a "3s" bms. This will be for 3 cells in series and you will need only 3 resistors to fake the individual cell voltage.
Awesome! I have been looking for such a device for a while. Do those resistors get hot?
I was also looked for something like this, but I keep finding just with relays and I got the idea to try to do something using BMS and it works as expected.
It doesn't heat up the resistors because 4V flows from each one but I think it will work even with 10K resistors, but they all have to be the same.🤝🙂
@@ErCanEverything Thanks a lot! Will be ordering this bms from AliExpress right away, can you please share a link?
@@ibmezouarI forgot to add the link in the description and will add it now🙂 a.aliexpress.com/_EI0XNip
@@ErCanEverything So I assume it's the 5s model needed? Can they really supply 25A? Very good value for the sorts of projects I want to use these batteries on.
I think it will handle up to 25A without problem🙂
Very useful and these modules are not expensive. For other voltages we probably need other modules 🤷
Have you tried resistors with other values?
Thanks for sharing Brother!
I haven't tried with other resistors but I think it will work with 10K which is better for the battery. I think this module can work from 3S to 5S but I'm not sure. For 3S, we use 3 resistors, the first one starts from P+ and we connect the final resistor to B- with a cable.
I'm glad if you liked it Brother🙂🤝🤝🤝
Good work
Make this for 12v battery
I didn't know this until now, I've never opened a 12V battery🤔
I think if two resistors on the left are removed and a jumper is put in their place it should work with 12.6v batteries🤔
Just use the 4 cell version of the BMS that the author linked to for 12V. For 18/20V you need the 5 cell version. The 3 cell BMS is for 9V battery packs while the 2 cell version is for 6/7V ones.
@@PhoenixRevealed thanks
Interesting! What components they use on the tool side(Parkside :))to do the same? The Amp draw can be substantial on the tools?
On the tool side, there is a BLDC controller with 6 or 12 mosfet transistors that serve to control the brushless motor. And these transistors are controlled by a microcontroller that decides whether the voltage is within normal limits. If the voltage is normal, it starts to control the transistors, if it is low, it does not allow the motor to rotate. 🙂🤝
@@ErCanEverything Thanks mate. So so it works like a simple "ESC" with under voltage protection.
I don't get it. Doesn't the Parkside battery already have BMS with overcurrent, overcharge and short-circuit protection ? What is the point of this ?
At the beginning of this video I showed you an LED lamp and a BT Speaker that I made by myself without discharge protection, and this module will serve to protect the Parkside batteries that I use. Parkside's 20V batteries have a BMS that balances them and communicates with the given tool, but they do not have low discharge or overcharge protection. All this is done with the help of the tool that communicates with the battery, and the tool decides if the voltage is enough to work. This also applies to the charger, as soon as the battery reaches a certain voltage, it sends a stop charging command
discharge protection is in the tool not the battery
@@ErCanEverything Oh I didn't know that. I was about to make some DIY projects with one of these batteries. Thank you for the info, you are a savior !
You can DIY but you have to monitor the battery level, as soon as the yellow light goes out I changed the battery🙂🤝
@@BlastarX if you over discharge (below 15v) parkside x20 series battery the balance IC will lock out, then it will not allow charger to supply voltage (by a data handshake and keep charge alive data stream. it also wont perform balance if you supply external charge voltage)
2.9 volts is too low for 8650s... It will considerably reduce the lifespan of those batterys..
wery nice
Лайк
❣️🙏🌹
Thank you🙏🙂🤝
+
Thank you my Friend🙂🤝
Hi. I'm trying to make the same (for makita battery). However, my BMS does not reset after 30 seconds. It will only reset by charging the battery for a second. This is not very usefull for me because I'm making a tool where you can swap batteries. The BMS will now locks itself out if it detected an under voltage and can only be reset by charging it or connecting the battery GND to P- for a second. How did you work around this?
I encountered this problem when the time came to implement it in a project. But I solved it this way as shown at 13:07 in this video ruclips.net/video/_CKx3KMSdGY/видео.html
HI @@ErCanEverything Your above comment to add a button, shorting the relevant 2 pins of the BMS is a real life saver! I was struggling for many hours with this project, as the BMS did not start if I turned it on with any load. It solved the problem immediately. THANKS A MILLION @ErCanEverything.
Btw, I did it with 10K resistors, works like a charm.
Your remark should be put in the video description as it is totally useful.