Jura The idiot
General
Hendrik_2000
Lieutenant General
Samsung galaxy is not the only one Dell laptop explode too. Sofar they haven't found way to mitigate fire on laptop ion battery. On submarine that is suicide . Goodluck!
There is nothing to stop the other AIP subs to replace their lead-acid batteries with Li-on batteries. This is actually pointed out by the article in #2261.
Essentially all what the proposed Soryu class is doing is to exchange the bulk and weight of liquid oxygen tanks with extra Li-on batteries by loosing the capability of running totally submerged. It is a tactical choice, not much of a technological advance. The only technological advancement would be to reduce/eliminate the danger of Li-on battery to be lower than the danger of liquid-oxygen or/and liquid-hydrogen in case of fuel-cell.
As this thread is about Japan, I must make it clear that I am not bashing Japan's technology advancement. And I am aware that Japan is ahead of most countries in Li-on battery technology. What I am trying to say is that Japan's motivation of going this path has more to do with tactical consideration and maybe reducing reliance on foreign technology (politically and economically) than the supposed advantages proposed by the article.
Essentially all what the proposed Soryu class is doing is to exchange the bulk and weight of liquid oxygen tanks with extra Li-on batteries by loosing the capability of running totally submerged. It is a tactical choice, not much of a technological advance. The only technological advancement would be to reduce/eliminate the danger of Li-on battery to be lower than the danger of liquid-oxygen or/and liquid-hydrogen in case of fuel-cell.
As this thread is about Japan, I must make it clear that I am not bashing Japan's technology advancement. And I am aware that Japan is ahead of most countries in Li-on battery technology. What I am trying to say is that Japan's motivation of going this path has more to do with tactical consideration and maybe reducing reliance on foreign technology (politically and economically) than the supposed advantages proposed by the article.
TerraN_EmpirE
Tyrant King
Lithium ion batteries when well made are not that much more dangerous than Acid lead batteries.
SamuraiBlue
Captain
My take is that all technology has it's strong and weak points.
The reason why JMSDF is opting for Li Ion batteries and this has been mentioned by the brass, is because with conventional AIP system is that the sub's mission range is dictated by the amount of liquid oxygen supply they carry.
Although Li ion batteries require to snorkel, it fast re-charging characteristics makes it possible to fully recharge within few hours and not half a day.
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Skywatcher
Captain
Snorkeling won't be as big a concern if the Lithium battery equipped subs stay mostly within Japanese waters or close to it.
Jura The idiot
General
Jura The idiot
General
well I happen to know even the Czechoslovaks for some time
flew with some high frequency radar to detect a snorkel
(this unit engaged 33 U-Boots, out if which five were sent down, and one damaged;
the connection to Japan would be the successful attack of the German steamboat Alsterufer bringing rubber from Japan to Germany)
I mean just everybody goes after snorkels
SamuraiBlue
Captain
I am aware that surface radar is able to pick up a snorkel BUT if the sub is up for just a couple of hours at a time instead of 6~8 hours needed to recharge conventional lead batteries then it makes it a lot harder to find.Also these days the snorkels are coated with radar absorbent paint so you'll need MPAs to come a lot closer for the sub to be spotted.
As for;
This actually doesn't work so well or JMSDF would have done it a long time ago. The problem is the sub's electrical system is all worked around the capacity of the batteries. It's like plugging in an electric appliance that is designed for 100V into a 200V industrial outlet, the appliance will be fried the moment you turn it on.
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