Anyone that can help me with a Dyness B4850 BMS pcb. I need to replace the BMS only. 

I dont mind a 2nd hand one. 

Please give me a call if you know where I can find one.

Quintin

 

Module was bought November 2020. We had a lighting strike and that caused the BMS to go. Thank you for your assistance Gelo I will definitely give Andy a call.

 

Edited February 10, 20215 yr by QBannister
Here is the damaged BMS

The battery packs was tested individually and all in good order. I would like to get this module going again. 

QB

For interest sake, now that you have opened the battery, is the battery in that Dyness a 15S or 16S ?

Are they using pouch  cells ?

@QBannister could you possibly post some pics of the rest of the battery? Would be interesting to compare the Dyness to Pylontech to Hubble and maybe a few others.

I will sent you some more pics over this weekend as Im at work and moving company. 

 

 

Any news or updates? Intrested to know who covers damage, or warranty if applicable

Edited February 14, 20215 yr by Gelo

21 hours ago, Aspergo said:

Dyness are 15S pouch cells.

Thanks for answering my earlier question Aspergo. 

If you look closely at the first photo from QBannister, you will see that there are 16x Mosfets close to the connectors which are connected to the cells for individual cell monitoring. Next to the Mosfets are 16x (pic is a little blurry) SMD resistors for what I assume are the balancing resistors.

Now because there are 17x FETS and 17x balancing resistors leads me to the conclusion that the BMS is also used in a battery with 16S configuration.

The same applies to Shoto. The earlier models of Shoto I believe were 16S but the latest models are similar to the Dyness/Pylontechs/other look-a-likes with a 15S configuration. I can only assume this is for cost saving. A number of other suppliers eg Blue Nova, LBSA have 16S configuration.   

any luck @QBannister

I have similar issues with B4850 PC Boards 4 off all lightning damage

 

Hi, How did you solve this. I have the same issue now. Where can i buy the BMS boards from?

On 2025/11/06 at 1:25 PM, gerald5ive said:

Hi, How did you solve this. I have the same issue now. Where can i buy the BMS boards from?

Hi, you can try on ebay for the boards, i have found some of them here in the past.

Best Regards