BYD , CATL & Sinopoly , Winston LFE Cells

Engineer34 said:

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I was also curious about the economical view of as well. These prismatic batteries promise like -cycles.
But how many cycles can salvaged from batteries can offer ?

I checked some new has 500 cycle life, can not imagine salvaged cells cycle life. If so why everybody use ?
It should be 4 times cheaper then prismatic new cells. Right ? Can anybody give some figures in order me to understand ?

Goto sinopoly to know more.

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(lithium-ion) can definitely last longer than 500days in a solar DIY system... but I agree its a question of how long that is interesting to me.
Here's a thread by @Generic -

There's also the famous Battery University page -

One thing about (s) is that they are 'many small units' (as apposed to a prismatics bank that would likely be fewer/larger units) and it might be that as my battery bank ages it will die in groups of cells here and there rather than 1,000(s) of cells all at once - so I may have a chance to extend the life by ongoing cell maintenance... which is why I designed my packs to be serviceable.

(lithium-ion) can definitely last longer than 500days in a solar DIY system... but I agree its a question of how long that is interesting to me.Here's a thread by @Generic - https://secondlifestorage.com/showthread.php?tid= - whose's cycling some s @ 100% DOD to see what happens - he's reached the 1,200cycle mark recently and a couple of the cells still have 75% of the starting capacity.There's also the famous Battery University page - https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries - showing that 1,000(s) of cycles are possible at low DOD %(s). My oldest 14s120p battery is now 2yrs old with 603 cycles at average DOD of 44%and going strong. ButI need 7,000 cycles to break even, so it will be a while yet before I have serious data....One thing about (s) is that they are 'many small units' (as apposed to a prismatics bank that would likely be fewer/larger units) and it might be that as my battery bank ages it will die in groups of cells here and there rather than 1,000(s) of cells all at once - so I may have a chance to extend the life by ongoing cell maintenance... which is why I designed my packs to be serviceable.

Hey,
Sorry I may have not made myself clear,

Obviously adding packs in series will increase the voltage, 18.5v 5A packs x 4 in series would be 74V and still 5A.

However I am going to then parallel these packs to begin increasing my range and torque, looking to add maybe another 8 lots of 4 ( in series) in parallel, thus ending up with a pack of 32 Batteries, set up 4S8P so 74V 40Ah. If that makes sense...

Anyway, my thinking is that the plugs supplies with the turnigy batteries are suitabe for 18.5V, but will they be suitable for 74V? These I then imagine will need to connect to some sort of busbar for the parallel connections, with a pair of 25mm cables running to the motor controller (2x25mm as I can get my hands on it easier than 50mm and it should be easier to route around the bike, while being able to make tighter bends within spec)

Going on from that, if my thinking is that the turnigy is 5A and rated at 20C, does that mean the cables supplied are capable of handling 100A for short bursts?

Anyway, I'm sure that has not clarified my question at all...

At the rate people are becoming obese in the UK id almost agree that physics is more important, perhaps they would learn how to leaver themselves off the couch and over to the fridge.

Swayze.

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