Japan navy JMSDF submarine sub Oryu Soryu

Japan launched its latest Soryu-class diesel-electric attack sub this month, the Oryu.
The sub was the first to feature lithium-ion batteries, which store about double the power as previous batteries.
The new batteries may help Japan’s own defense industry and give Japan an edge in the increasingly crowded waters of the western Pacific.

With more Chinese submarines roaming the Pacific and the Trump administration pushing US-made hardware, Japan is putting into play a new piece of gear that may give its subs an edge at sea and keep its defense firms afloat.

On October 4 in the city of Kobe, Mitsubishi Heavy Industries launched the Soryu-class diesel-electric attack sub Oryu, the 11th sub in the class and the first to be equipped with lithium-ion batteries.

The Oryu has a number of upgrades over previous Soryu-class boats, which are the biggest diesel-electric subs in the world, but the biggest change is the batteries.

Diesel-electric subs use power from their diesel engines to charge their batteries, which they switch to during operations or in combat situations in order to run quietly and avoid detection.

The lithium-ion batteries in the Oryu — which store about double the power of the lead-acid batteries they replace — extend the range and time the sub can spend underwater considerably.

Mitsubishi turned to Kyoto-based firm GS Yuasa to produce the new batteries.

The latter company said in February 2017 that Japan would be the first country in the world to equip diesel-electric attack subs with lithium-ion batteries, putting them on the final two boats in the Soryu class: the Oryu, designated SS 511, and its successor, designated SS 512.

Previous Soryu-class subs used two Kawasaki diesel generators and two Kawasaki air-independent propulsion engines. (AIP allows nonnuclear …read more

Source:: Business Insider

      

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