[PSUBS-MAILIST] Lithium Batteries

[via Personal_Submersibles]

Alan,Nuytco built a bunch of lithium equipped DW3000s for Russia.The weight and charge rates were astonishing. As was the price, apparently. I wonder how those battery banks are holding up now that they are in the field.Vance


-----Original Message-----
From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
To: personal_submersibles <personal_submersibles at psubs.org>
Sent: Wed, Apr 8, 2020 9:21 pm
Subject: [PSUBS-MAILIST] Lithium Batteries

I have been watching the progress of lithium sulphur & other new lithiumbattery technologies & they seem to be inching closer to commercialisation with a few break throughs recently.There are figures of 700 W/L ( Watts per Litre) being touted.Lead acid have an energy density of 80 W/L & they recommend not dischargingthem below 50%, so 40 W/L. Lithium batteries have a depth of discharge of 80%   so in the case of the 700 W/L battery that would be 560 W/L available.This means 14 X more power available for the same amount of space using thenew lithium technology.https://www.greencarcongress.com/2020/03/20200315-sion.htmlIt might be worth keeping in mind for future builds, as it may make things likeair conditioning & extra or larger motors a more viable consideration.I know they have always said that the lithium sulphur batteries will be cheaperthan lead acid on a W/L basis.Below is a chart showing comparisons between lead acid & a standard lithiumion battery.Alan


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