Smart battery device and battery system

One or more systems, devices, and/or methods implemented by the systems are provided that can facilitate providing a varying AC output voltage or DC output voltage, including selectively providing a positive voltage output, a negative voltage output, and a no-voltage output separately. An apparatus can include a battery cell, and a controller connected to the battery cell and varying an output from the battery cell, wherein the controller is configured to cause the battery cell to selectively individually provide a negative output voltage, a positive output voltage, and a non-output voltage. A method can include changing an output polarity from a multi-cell cluster, and selectively providing one or both of an alternating current (AC) voltage output or a direct current (DC) voltage output from the multi-cell cluster due to the change in the output polarity. 提供了一个或更多个系统、装置和/或系统实现的方法，其能够便于提供变化的AC输出电压或DC输出电压，包括选择性地单独提供正电压输出、负电压输出和无电压输出。一种装置能够包括电池单体，以及连接到电池单体并且改变来自电池单体的输出的控制器，其中控制器被配置为使电池单体选择性地单独提供负输出电压、正输出电压和无输出电