Patent ID: 9172269
Filing Date: 2015-10-27
Classification: H02H,H02J

Abstract:
1. A charging device, comprising: a charging circuit, receiving a charging power source, and producing a battery-charging power source at a first node by the charging power source to charge a battery; a voltage detection circuit, detecting a voltage at the first node, and producing a voltage detection result; and a keyboard controller, determining whether the voltage at the first node is lower than a predetermined voltage according to the voltage detection result, and determining whether a predetermined condition has been satisfied, wherein the predetermined condition comprises the voltage at the first node being lower than the predetermined voltage, and the keyboard controller forces the charging circuit to stop producing the battery-charging power source at the first node when the predetermined condition has been satisfied; wherein the keyboard controller determines whether a charging current flowing to the battery from the first node is less than a predetermined current value when receiving the charging power source, wherein the charging current is produced by the charging power source, and the predetermined condition further comprises the charging current being less than the predetermined current value.