Under the skin: new silicon battery tech is self-healing and fast-charging
Storedot has also patented a ‘self-healing’ technology to seamlessly repair individual damaged cells in the background. It identifies a cell or string of cells that are not performing as they should or are overheating, takes them offline and reconditions them back to 100% before bringing them back on line. The process is designed to happen during use and without the driver noticing any difference to driving or performance.
Repair of the affected cells consists of a deep, slow discharge and equally slow recharge in much the same way as a conventional car battery might be rejuvenated using a specialised smart charger. All lithium ion battery anodes form a coating on the surface of the anode called a solid electrolyte interface , which forms and dissolves during charge and discharge.
Storedot attributes its rapid progress partly to the development of AI software, which analyses every morsel of available information relating to the use of silicon in lithium ion batteries. So far, it has achieved the goal of being able to mass-produce silicon-dominant cells that can withstand extreme fast charging over 850 consecutive 10-minute cycles and retain 80% capacity, and it has a 10% expansion rate and a capacity of 300Wh/kg .
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