Batteries and New Battery Technologies

For pretty much forever, the lead-acid battery industry has had 100% control of the price of battery power. There simply wasn't enough capacity among the alternatives to be able to put much price pressure on lead batteries. They basically competed with one another, and that was the price environment the other technologies had to deal with. That may finally be changing. It's about 20 years later than the lithium folks thought it would happen, but it does look like there is some competitive pressure on the lead battery industry as a whole. It will be interesting to see how and when this trickles down to more mundane batteries.

Here's one example.
12NXS120 - NexSys Online Store https://nexsysstore.com/product/12nxs120/

 

Absorbed Glass Matt (AGM) and Valve Regulated Lead Acid (VRLA) batteries are significantly different from the old flooded acid type. The C charge/discharge rates can be much higher without causing damage or shortening the battery life. The dendrite formation is also greatly reduced, which is one of the typical failure on the flooded acid type. That link has some sales claims that make no sense. It states that the capacity is highe at C20 than C6, which is contrary to Peukert's Law. I worked on battery research at UW-Milwaukee for Johnson Controls for a couple of years. The project was given to Joshua Harris and myself, because the German engineers at Varta said it couldn't be done. We had a lot of fun with original research, even though at the start were upset to be transfered from Li Ion battery research. We thought it was a waste of time and a dead end. We discovered that there are at least two intermediate reactions during charge/discharge on AGM batteries. Unfortunately we got to the end of the project before having a chance of exploring that further. We did find out that the glass matt separator is the critical component. The diameter and consistency of the fibers affects the capacity of the battery. Also, the compression ratio of the glass matt is critical; there is a narrow optimal range. The main advantage of lead/acid batteries is that they are easily and economically recyclable. In applications where the weight is not an issue, they are much superior to Li Ion in price to capacity ratio.

 

The capacities are for the 6 hour and 20 hour rates.

What does AI know . Ask it what a c6 rate is. Of course, they have the inverse, which I see all the time.
This is the way I learned it.

... but then there's this

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So what the call C 5 is actually C 0.2 .