The world’s largest battery maker is taking a step back from the eclectic vehicles sector to refocus its efforts on energy storage. China’s Contemporary Amperex Technology Co. Ltd. (better known as CATL) has been building up its energy storage portfolio for years now, but the company’s transition away from EVs and toward energy systems has been supercharged by the artificial intelligence boom. Five years ago, just 2 percent of CATL’S sales came from battery storage. Today, storage accounts for a full quarter of the megacompany’s…