SBP found at an electronics recycler, will not charge, taking apart

israndy

I opened a ticket with Zendure when I purchased this unit and found it would not charge from the wall. Their A.I. suggested that I leave it charging for many hours to be sure it won't do it. If that didn't work to hook up via the XT60 plug next to the AC inlet and charge that way. I hooked up my Superbase 1000M to it and it again looked like it was charging but showed 0% and 0:00 until finished charging. I also did the DC charging for a day. I wrote them again with the results but haven't heard back.

I spent the day taking the Superbase Pro 2000 apart, and I now have the battery pack with BMS and parallel boards out and I am measuring only 1.8 volts. That's TOO low for a pack of this size although I'm not really sure what the normal voltage should be, probably 48v. To see if I can bring the battery back to life I have hooked a fifteen volt one amp power brick to the battery B+ and B- which I will watch for the next day or so. Anyone has any better ideas?

I have a Drone charger but it only has 7 pins to connect to each row of parallel batteries. This pack is 13s14p, I don't have anything that can intelligently charge it, so I will try to get the voltage across the pack high enough to wake the BMS up so I can finish charging using it.

I did connect to it via WiFi while Iit was trying to charge and looked at its history. Apparently it was used only once, in July of '22, it was charged all the way up and then a few days later discharged and hasn't been touched since. That kinda makes sense, the BMS board shows a production date of 12/12/21

Michael

Da ich annehme das Sie keine ausgebildete Elektrofach Kraft sind, ist von einer Instandsetzung dringend abzuraten. Damit gefährden Sie sich nur selbst, im schlimmsten Fall noch andere Personen. Dieser Speicher hat sowieso nur zwei Jahre Garantie, und wurde deshalb sachgerecht entsorgt.

israndy

Actually, finished my career as an Apple Genius, so I have taken apart a LARGE number of computers and battery powered devices. I think it will be cheaper and more interesting to put recovered batteries into this unit than buy a working one. I already have a small collection of 18650's w/ almost no usage on them. I was really hoping I could goose the pack back to life with a bump from a charged battery pack, but I tried to do it on the bank from B0 to B1 that was reading zero volts and it seems like it didn't take a charge.

If I don't have any success waking this pack I'll have to remove the BMS and the crossover and the balance board to take it apart and pull the batteries to test each one.

BritishBiscuits

Did you manage to get anywhere, i have a superbase that wont charge and is unresponsive.

israndy

I did get the unit apart, there are 13 parallel banks of cells connected together in series but sadly only two of those banks still have charge. It looks like the other cells were driven negative by the cells that still had power, like in a flashlight with one weak battery. So I got 28 cells that still work, and seem to work perfectly, I think they were only cycled once. BUT they are not common batteries, they are 20650 cells. I tried to order some from China, but never heard back from Alibaba.

I ended up getting a couple of boxes of 18650s that have the same rating of 3.6v and 3200mAh. They will have to be held in place somehow, maybe toothpicks, but then I'll spot weld them in place and hopefully be up and running, lots of work, but fun to figure out.

If you can make use of the 28 cells to get you going let me know, I was gonna sell them on eBay. If you don't wanna do the work I'll gladly give you $50 for the unit like I paid for this one.

BritishBiscuits

I'm talking with support at the moment, i have been able to charge my SBP by DC but im still unable to charge by AC power and im unable to use AC power out but i can use the usb c on it.

I have tried to connect to the SBP in the phone app in an attempt to update the firmware but i can't do anything as it shows up as "Offline" even though i have paired the SBP to my home wifi.

israndy

Good luck

israndy

OK, So I took the battery apart, discarded the dead cells, found a guy selling the same capacity cells on Craigslist, bought an 18650 spot welding pen and some nickel strip rolls. Placed the new batts in the original Zendure cell matrix offset with some toothpicks and started welding:

I was making a video the whole time so I could see how the cells and the strips lined up originally and I just reproduced the same pattern. Each of the two banks took a bit less than a day. I tried to put the machine back together last night after finishing the second pack, but ended up having to wait until today. Got it together and am not missing any screws, plugged it in and it stopped beeping, it was showing 0% charged but quickly it jumped to 1% and so on. Looking good.

israndy

I was watching a Zendure video yesterday and did I misunderstand, the SBP comes with 4 years of warranty?? Since I wasn't the original owner how do I claim warranty? They asked me for my invoice and receipt and then closed my support ticket when I couldn't provide them.

Also, the manual doesn't mention this icon, anyone know what it means?

Rocky

My spb 1500 stopped charging normally as well. All the sympoms, whitch are described here. Dont start charging and inverter shuts itself off. I managed to charge it by doing the following. 1. Shut the unit off. Not connected to anything. 2. Start the unit. 3. Switch dc button on. 4. Switch ac button on and inverter starts. 5. Connect wall charger, it starts to charge. 6. You can toggle ac and dc off and it continues charging.

israndy

OK, that was a LOTTA fun, just finished the last step in getting the SBP working. There were a few issues with the front logic board mounts cracking so the buttons wouldn't click. Perhaps this unit was tossed around too much, but after removing it and reseating it I found some slightly longer screws to hold it together. If you are interested here is the video of the entire rebuild process:

https://www.youtube.com/watch?v=NbnpPAnxh38