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- Опубліковано 17 жов 2020
- DR600 Li-ion battery pack was taken apart and a battery management system (BMS) was added to it. This was not very easy, but not too bad either, having equipment, materials and experience with this sort of thing. If you are going to do something like this, please be very careful. Don't try this if you don't know what you are doing.
Li-ion pack for Roland V-Accordion investigation: • #101 - Roland V-Accord... - Наука та технологія
You can use Isopropyl alcohol to release the hot glue.
It was a great thrill to see a competent artisan doing a job so well --- it also served to warn me not to try anything like it --- I wish that man lived in Ireland. 😀 😂
I'm sure someone told you that isopropyl alcohol makes hot glue come right apart. It's like magic.
Hi, Can you make me one? need to replace my current battery. Thanks
If the "BMS" is only monitoring the voltages without balancing, I would use much thinner cables.
Hello good day
I would like to know if you could fix the roland fr7x accordion screen.
If you can fix it, could you tell me the total price, the fix and the shipping
I am from Spain.
A greeting.
Just curious, when you say "discharge the pack" what voltage per cell are you considering to be safe?. Or, what is the main reason for the discharge?. Thanks in advance for any information.
I am not sure what do you mean by "safe". The main reason is to limit potential problems if you happen to short or damage the cells. The discharge target voltage is about 3V per cell. The overdischarge protection threshold in the BMS is set slightly lower than that. The cells still might have enough energy left to cause some trouble if mishandled, but it is better to minimize the chances. Just let the accordion play in demo mode until it shuts off. And again, if you had to ask, are you sure you want to tackle this? Good luck if you decide to try.
@@feedback-loop I was curious of your reason. It is a great idea to lessen the voltage. I am used to working on cells at storage volts [3.6V].
What is the point of having connections to all the cells if it does not balance? Does it just shut off if a cell is out of balance?
Safety is the main point. If any cell goes out of roughly 3-4.2V range, the whole pack is disconnected. Otherwise bad things can happen. I explained this in my previous video, so I did not repeat this time.
@@feedback-loop I thought so. I must have missed the point. Considering the cost of these little BMS controllers, I'd never connect even two cells without one. The fancier one's with a serial port are amazing. I have a few of those for larger packs.
Oh c'mon: aren't you going to *play* the accordion? :-)
I don't know how to play this thing. Not my cup of tea.
@@feedback-loop Thank you! :)
could you make one and sell it to me ?
Why don't we just stick with NiMH? Is the original Roland design so bad? Just curious because I am going to have to replace my battery soon and I while I was originally thinking in terms of going Lithium I am now beginning to wonder if it is really such a good idea. It just seems like it is all too difficult and in the end, maybe pointless.
If done right, Li-ion is better: lighter, no memory effect, lower self-discharge, lasts longer. However in this case, if the only option is this pack without BMS, then I am not so sure.