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I received my order of 16pcs 150Ah cells from BLS yesterday. This was the timeline: 2019-11-29 Order placed 2019-12-02 UPS tracking number received 2020-01-08 Tracking number traceable in Germany 2020-01-13 First scan of the parcels 2020-01-15 Goods delivered in Sweden I've not yet paid any...

You are fooling yourself. If you want to know the state of charge of a cell without letting it rest for a long time, you need to do Coulomb counting. Trying to gain information from cell voltage while charging and comparing that to a table of resting cell voltages is nonsensical. I'll leave you...

I just placed an order for 16 pcs 150Ah cells. Curious to see how the tax/duty free shipping will work to Sweden. Will be doing capacity tests on each when they arrive. If all goes well, I plan on ordering another 16 pcs and build a 2P16S pack to replace the 1P16S 60Ah CALB pack I currently...

That makes no sense. Couloumbic charge efficiency of LiFePO is about 100%. If you are charging with a constant current from 0% to 100% the last 20% (from 80% to 100%) takes exactly 20% of the time. If you are trying to define your point of 80% charge from your table of voltages above, you are...

At what C-rate are you charging if you get to only 60% SoC before entering the CV state? With charge rates < 1C my experience is to get almost full cells before switching to CV mode, and with a very quick current taper after that.

I've had no issues what so ever with them. Been working flawlessly.

Regular lock washers don't do much good. Use NordLock washers and/or thread locking glue/"Loctite".

As in a voltage vs SoC table? Such a table only makes sense if the cells are well rested. During charge, it means nothing.

You are simply wrong here. What happens at low temperatures in a LFP cell is that as the temperature drops, the mobility of the ions drops. This means that the rate at which the cell can accept charge without metal plating is reduced. There is no cliff. No cut off temperature. It's a slope...

I'm not arguing about the fact that plating will occur if you charge at too high a rate at too low a temperature. It's a known fact, and very harmful to the cells and the damage is indeed permanent. It is not as simple as any charge below freezing = death and any charge above freezing = fine...

I bought the HiGee 150 Ah cells from BLS in about the same time frame. I did full capacity tests on each individual cell using a programmable PSU and an electronic load. That is in no way needed, but it did give me a lot of information. Most valuable to you would be that while all the 33 cells...

If your cells are poorly matched, there might be voltage differences internally under load. If you have the cells connected together with bus bars, you will never be able to measure a voltage difference between them. It is a complete waste of money to install separate measurement devices on...

You're off by a factor of ten. If you are charging with three amps, a cell balanced with 30mA would get 2.97A charge.

You did cells, not a battery. That is one of the reasons you are getting a better price. It is entirely possible, I would say even likely, that the cells are just out of balance, not deficient. When you buy cells, you need to have the equipment to handle cells. If you want a plug and play...

Not a direct answer to your question, but you don't necessarily need 500Ah cells. You can just as well parallel 5 x 100Ah cells.

With a top balancing BMS, you should not be doing a bottom balance of the cells before building the pack. It would just create more work for the BMS, taking longer before the pack is in balance and able to give full capacity. If you want to do balancing before building the pack, do a top balance.

Rotate the pack 2 another 90 degrees and ut will still connect in the same way and not look like crap

Shunts are usually placed on the negative side because that makes for cheaper electronics to measure the shunt. It is not a safety issue. The linked site has basic misunderstandings of electrical theory, not a source worthy of trust. In a grounded system, having the shunt on the positive side...

The terminals on both the Higee 150Ah (sold by BLS) and the CALB CA60 are M6 thread, very comparable in size. The bus bars I received from BLS are of this type: https://www.aliexpress.com/item/4000351777250.html?spm=a2g0o.cart.0.0.43653c00wxMfCm&mp=1 For the CALBs, they are of this style...

There is absolutely no need for brass hardware. Stainless is a much better material for fasteners and a lot cheaper. Current carrying capacity is irrelevant. The fasteners role is to clamp the cable lugs to the terminals, not to carry the current.

MC4 is a brand name for a connector made originally by the company Multi Contact, now owned by Stäubli. Those are very high quality connectors. There are compatible connector from other quality manufacturers. Helios H4 from Amphenol comes to mind. There are also heaps of cheap copies from...

Every battery manufacturer in the world use stainless steel hardware, as do every professional installer. If you think you know better, go ahead with brass.

What I think you Americans call wire nuts have not been used in AC installations in Sweden since the nineties. The Wago 221, and other similar models with opening levers, are not used that often since they are rather expensive. We mostly use the simpler versions where you just push the wire in...

Two batteries put in parallel can become unbalanced. One pack of parallel cells avoids that problem. It is also cheaper, with just one BMS. If you can, avoiding parallel batteries is a good idea.

Sorry for the scare :) Electrodacus seem very knowledgeable and he's been around for many years. Certainly a trustworthy source of information. His's manuals are second to few.

GWL has been a leading distributor of LiFePO cells in Europe for about a decade. I bought my first set of Winston cells from them about ten years back. I've also bought CALB cells through them. In my experience, stock is fresh, packing is excellent, delivery and service is great. You get what...

Your charge cut off voltage should be a function of the charge C rate. If you charge at 1C, a cutoff of 3.65V might be just fine. If charging at 0.15C, like you are, the limit should be lower. The 10A charge on a 200Ah pack would only be 0.05C. Cutoff should be lower still.

A 12V system and a 24V system in the same vehicle can share the same ground potential. Using the chassis as a negative conductor for the pack could work. I would not cheap out on a little bit of cable, there's not much money to be saved. Cables are made to carry current. Chassis are not. Equal...

The Wago 773, imaged above, are rated for 24A. Do you normally have 120V circuits rated higher than that? That sounds like the older generations of electricians in Sweden did :) Perhaps early push in contacts were bad? I've replaced plenty of light switches and receptacles from the 90s with...

Decreased voltage will not lead to a higher current carrying capacity for the BMS. The limiting factor is the heat in the MOSFETs. That heat is from resistive losses in the MOSFETs, independent of voltage. A BMS built for 16S will need to have MOSFETs that can handle a voltage of >60V. A BMS...