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12v 190ah lifepo4 from aliexpress

ScoTTyBEEE said:
The terminals have steel threaded inserts in them, that is a helicoil, I replaced my broken one with the same thing, they’re m6. A grub screw is just the screw shaft so it lets you place a nut over the top, probably just has a different name where you are, blind screw perhaps. I put superglue on the (longer) grub screws and tightened them in, it would glue everything in place. I had to sandpaper the terminals after the glue had dried as the gas created a bit of a film over them, I just used regular loctite super glue, nothing fancy. If you want to ensure the nuts don’t work lose then threadloc or just put 2 nuts on but I think it will be ok, normal batteries don’t have problems working lose.
Click to expand...

It all makes sense now. Thanks again.

I found another method of securely bolting to these types of terminals. Check out drawing D here: https://diysolarforum.com/threads/eve-280ah-lifepo4.2175/post-19916

nosys70 said:
you can also polish busbar at surface contact.
the surface contact is a circle about 20mm diameter, that is a lot enough.
since the busbar should be around 1mm2 per Amp, if you want to use 1C, then you need around 200mm2
Click to expand...

This is very useful. Thanks much.

I'm much more confident in using these cells thanks to the info from this forum.
 
I ordered 4 of these batteries on Dec 31st, they are currently in customs in LA, hopefully I will get them in the next week or so.
 
Shipping is never free. It is either included in the price of the product, in which case the shipper will use the lowest possible cost shipping method. Or it is added on specifically, in which case the buyer may be given the option of various shipping methods. Due to various postal treaties, Chinese companies are able to ship "small" items at very, very low cost, often much cheaper than I can ship the same thing (light and small) from LA to say Dallas. Sometimes Chinese companies ship in bulk to a US (or other) warehouse and then ship to you from there.

Of course it doesn't matter to you as the buyer if shipping is "free" or extra; the total cost to your door is what determines how much you pay.

When looking at larger/heavier items its worth knowing that if you ship as part of a container load that once you factor in all the costs (customs, dock fees, warehouse fees, collection fees, etc, etc) this total comes to roughly the same as shipping the same items Fedex to your door! Its only once you order a full container that you save money. I learned this the hard way ;-)
 
lmwilco1 said:
I just got an update from Fedex that my batteries were delivered to them in Carson, CA. No estimated delivery yet. I ordered them on Jan 31st.
Click to expand...
I finally got the same notice .... ordered mine Jan 6. Thought I was going to get in ahead of the holiday ... but didn't happen. I was just about ready to open a dispute.
 
They finally arrived, I ordered on 12/31. Three of the cells are at 3.69V, one cell at 3.71V, Should I connect them in parallel to equalize before assembling my pack?

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That's exactly how mine came packed.
I checked the starting voltages and all between 3.281 and 3.283. I was pretty surprised they were that close. How well my meter was making contact could account for that.
The terminals all look brand new .... so either they replaced them or they are all new.

Not sure if there is a Mfg date .... there is a tag on top that is hard to read on several of them. The bottom # looks the same on all and the top # is defferent on all.

I wore rubber gloves and wiped down EVERY surface with a damp bleach cloth. ;)

code.jpg
 
Started the battery build. I used VHB tape between the cells and a couple of tie wraps to keep thinks tight together. I have it all assembled on a table for testing before I install in the camper.

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Wiring for the BMS cell monitor, I have a 150A fuse on the positive terminal and there is a temp sensor also attached to the positive terminal. I need to get a 200A fuse for the main battery fuse.

DSCN1045_Large.JPG


Here you can see the 45A charger with a 50A circuit breaker, 2000W Renogy inverter, the shunt and power monitor. The BMS is on the left side of the battery. It is a 100A BMS from battery hookup, I will replace it with a Chargery when it arrives from China.

IMG_3352_Large.PNG


Once the battery finishes charging I will put a load on the inverter and see what capacity I get out of the pack.
 
I finished the load test and got 185.96AH using the aliexpress 150W tester. When I was charging the battery the BMS was shutting off charging while I was still pushing 10A into the pack due to individual cells going over the max voltage limit. I think if I top balance the pack I will probably get above the 190AH spec for the batteries.
 
If you use load test directly, will there be some power loss? I mean, the power factor of the load
 
I ordered 4 of these cells on Aliexpress Jan 1 and they arrived Feb. 15th to Henderson, NV. Perhaps I'll use Will Prowse as my name the next time........:) My first order on Aliexpress, so was starting to get worried!!!!!. The 4 CALB 100 ah cells took 1 day longer. I see the ad(s) are saying 195ah-200ah now. They were advertised as 190ah cells when I ordered????? Was there a YT review that showed they are higher capacity? They are brand new balanced cells. They all checked out at 3.31v and serial numbers ended at 41-44. Both boxes were packaged extremely well and shipped from Hawthorn, Calif. With what's going on in China right now, I'm feeling fortunate that I finally received them. I see the ad has kicked the receive date out to the end of April. Unfortunately, my lady friend kicked my newly setup battery yesterday and destroyed the Daly 100a BMS connector/leads. Anyone know what this plug is?...... I posted that ? on another thread, so hopefully someone can tell me what that plug is and I can get back to testing and getting my feet wet in the LiPo world.
 
THEY ARRIVED!!!!!..

Originally ordered on 14th December, and had the dispatch date moved about 4 times...... They look nice and new, clean terminals and all have the Little Quickview Barcode.. The Bus Bars are a little dissapointing .. they are 3 really thin bars, just heatshrink wrapped together..... Might replace those.... I have not done any testing yet, just took them out of the very well packaged box... No complaints so far............
 
The spec sheet in AliExpress for these batteries is conflicting on charge current: one location it shows 1C(190A) and another location .5C(95A). I messaged the seller for clarification on this and they replied that .5C is the recommended charge rate and 1C is the maximum.
 
I just recieved mine. Have a look at my post I just posted called "should I be worried". photos included
 
My 190Ah cells arrived in mid-February - about six weeks shipping time. I have them assembled into a 12V battery with 200A BMS, and I'm just waiting for warmer weather to install the battery in my RV. They arrived in great condition. I've run through a few charge cycles, and they are working as advertised.
 
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