User-scalable power unit including removable battery packs

Abstract

A scalable power unit for powering one or more electric motors of a riding vehicle and/or a piece of outdoor power equipment. The scalable power unit includes a number of interconnected battery packs. The battery packs can be received in a battery tray or stacked to form the scalable power unit. Each battery pack can be removed and used separately or added to a combination of battery packs. A control unit selectively opens and closes switching elements to separately control the connections between the battery packs and an electrical load, such as a motor. During charging, the control unit opens and closes the switching elements to control the charging rate of the individual battery packs. When the battery packs are connected to an electric load, the control unit controls the state of the switching elements to selectively discharge the battery packs to power the riding vehicle and/or electric loads.

Dependencies are inferred from the claim text.