probably enough?

C.F. 'O' Class Submarines - Electrical Systems
https://maritime.org/doc/oberon/electrical/index.htm
A sump is situated at the after end which is the lowest level of the battery compartment to catch moisture and spilled electrolyte. .... the natural intakes open (they are only shut in emergency or fire in the battery) the hydrogen clearance intakes open, the bulkhead sluice valve open and the hydrogen clearance fans running.
3 Missing and 18 Injured in Fire Aboard a U.S. Diesel Submarine ...
www.nytimes.com/.../3-missing-and-18-injured-in-fire-aboard...
Apr 25, 1988 - ''We don't know whether they are still aboard the submarine or whether they were in the water,'' Captain Baker said of the missing crew members. Lieut. Comdr. Bill Sonntag of the Atlantic Fleet said the fire was believed caused by an explosion in the submarine's battery compartment. Because of fire and ...

The Loss of the Submarine “ARA San Juan“ | Boating World | Current ...
https://www.liboatingworld.com/.../The-Loss-of-the-Submarine...
Jan 30, 2018 - And sadly, the general consensus now is that the ARA San Juan experienced an explosion and sank, killing the entire crew shortly after her last radio contact on November 15th, 2017. This was probably the result of a battery fire caused by sea water entering the battery compartment through the leaky ...

This is how it was reported in a number of newspapers (including the Sun and the Daily Mail, unfortunately), so I don't know if this is simply a translation or whether reporters were given this term and it then spread to other publications.

In any case, this seems to be how it was reported by most journalists.

Navy spokesman Enrique Balbi told journalists Monday that the captain had radioed that water had entered through the snorkel when the sub was charging batteries. (The snorkel is the device that allows a sub to operate submerged while still taking in air from above the surface.) The water went through the ventilation system to a battery connection tray in the prow and “caused a short circuit and the beginning of a fire, or smoke without flame,” he said.
http://www.edmontonjournal.com/news/world/battery argentine ...

Spanish term (edited): balcón de barra de batterias

The original text is describing where the short circuit occurred which led to
the explosion.
https://elcanciller.com/nota/983