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BQ25570EVM-206: 想问一下Vstor和Vbat的区别是什么?

Part Number: BQ25570EVM-206


想问一下Vstor和Vbat的区别是什么?我看datasheet上写的Vstor是输出口,但是我在Vstor上连接电容充电后,仍可以给输出供电一段时间,这种是错误接法吗?那Vbat的用法是什么呢?直接连接一个外部电池给输出供电吗?若是在输入端给2V电压,能给这个Vbat端口上接的电池充电吗?