China's Submarines May Soon Be Powered By Lithium Batteries

The Chinese Navy could finally use lithium technology to replace the lead-acid batteries that are now used in its fleet of conventional submarines. Interesting Engineering reports: Since lithium batteries had a higher risk of catching fire or exploding, the navy was hesitant to replace the submarine fleet's current batteries with them. But, "after solving these problems, the replacement of lead-acid batteries with lithium batteries in conventional submarines is just around the corner," said Wang Feng, study lead and a submarine designer. The study claims that technical answers have been discovered through significant testing and development in China's electric car sector, and lithium batteries have been demonstrated to operate safely under difficult circumstances. The modifications could considerably improve a submarine's capacity for survival and battle, according to research that was released on October 15 in the peer-reviewed Chinese journal Marine Electric and Electronic Engineering. For more than a decade, the Chinese military has planned to replace the lead-acid batteries in its fleet of conventional submarines with lithium technology. The lead-acid batteries on these submarines, which have not seen significant development since World War II, have proved problematic due to their poor energy storage capacity, delayed charging, limited power output, short lifespan, and harmful gas leaks, according to the paper. Nickel and cobalt, which are added to batteries to increase performance, were a contributing factor to mishaps; however, some Chinese battery manufacturers have begun using iron and phosphate in their place recently.

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