A LARGE Lead Acid Flooded Battery

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I love Rolls products.

Once you have 6 of these you've got something you can use.
 
what's the application?
For that size it's probably battery backup to cover the time until the generators kick on. Hospital or some industrial process where power loss is either very expensive or very dangerous.

Nuclear power plants also typically have a couple days of battery power for the cooling pumps in the event the generators don't work.
 
Rolls Surrette has been in the FLA battery business for a looong time.

The battery is that large so you can put them in one single series string to get the Wh and voltage you need. A series battery configuration lasts longer than parallel cells of the same capacity.
 
Rolls Surrette has been in the FLA battery business for a looong time.

The battery is that large so you can put them in one single series string to get the Wh and voltage you need. A series battery configuration lasts longer than parallel cells of the same capacity.
You want to think that over... or clarify what you are saying.
 
Many electric utilities have substations that have 60 very large lead flooded cells in series to make 130 V DC to run all the equipment that monitors the state of all of the power lines into and out of the substation, communicate with the main control room of the utility, provide output control signals to control switching of huge high voltage circuit-breakers in the substation, and provide power to operate the huge high voltage circuit-breakers. When the power goes out this equipment must still operate and control what stays connected, what gets disconnected, and what gets brought back up when sections that may contain the fault have been disconnected.

Electrically all 60 are in series. Physically it is almost always set up as two rows of 30 in series and the electrical beginning negative is on one end, and the final positive is on the end of the row next to it and actually fairly close to the beginning negative.

Usually the case is made of transparent plastic and you can see small bubbles on the plates.

These huge batteries are always on a trickle charge, and last a very long time, like 20, 25, or even as long as 30 years depending on the size and use. There are a few different size used depending on the demand and size of the substation. But at any given substation all the cells in the stacks are the same size.

When one of these batteries fail open and the 130 V DC is lost during a outage, very bad things can happen. One such case cost 10 out of 11 huge transformers, and much of the big metal pipe used to carry the current, to be destroyed. And those transformers cost one million each, and are special order and take a while to get produced, and even transporting them is a major chore. They are very big and heavy.

These batteries ain't cheap. Which may be why some times the penny pinchers are reluctant to replace them. In the case where failure caused major losses, the penny-pinchers who ignored multiple requests month after month to replace the worn out batteries tried to hang the blame on the person in charge of the department, who among other things oversees the maintenance of those batteries. He produced copies of all of his past request for replacement of those batteries, and was able to keep his job.

After that, the penny-pinchers were very liberal about spending money to replace old batteries in other substations.
 
I watched a service company replace two starter batteries for a Cummins diesel generator for my datacenter at work.

They were quite big, and about $380 each.

Their purpose is to turn over the starter motor for the big diesel to provide power to the racks of APC backups to keep my datacenter running in case of long term power outage.
 
Looks like a battery cell I worked at ARGONNE National Laboratory. At that time the thinking was to house a very large number of these cells and charge them overnight when the gas turbines could run at full effieient power. The cells would be dicharge into the lines when high power demands would over load the grid. My good old times. Ed
 
Down in the coal mine, our 120v battery packs on scoops are either 15k lbs or 20k lbs. Depending on size of the machine. They double as a counterweight like on a forklift
 
When I was at Lowes they had a narrow reach forklift that had a large and super heavy battery. Would get charged every night. The weight acted as a counterweight when the forks were extended lifting a pallet of something. We were moving pallets of mulch or dirt or fertilizer. Sometimes landscape stone.
 
That one has the most CCA of all the ones they list, but that's because it's only a 2 volt battery.

The 16 CH 35P is a way bigger battery.

https://www.rollsbattery.com/battery/16-ch-35p/

They are known as "unitized starting batteries" and are used in series with another one to start the diesel engine in railroad locomotives.
 
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