| 摘要 |
<p>Charger protection circuitry 110 for a rechargeable battery 130 is coupled between the rechargeable battery and a battery charger 140. During a charging operation of the battery, charge current flows through the charger protection circuitry in a first direction A. The charger protection circuitry comprises a main current tripping element 410 for interrupting current flow if the current reaches a first predetermined level, a switch element 420, and an auxiliary current tripping element 440 connected in parallel with the switch element for interrupting current flow if the current reaches a second predetermined level lower than the first predetermined level. A switch controller 430 is used to turn the switch element on and off in dependence on a direction of current flow through the charger protection circuitry. If current is flowing in the first direction A the switch controller turns on the switch element such that the auxiliary current tripping element is bypassed, whereby the main current tripping element controls interruption of current flow. If instead current is flowing in a second direction B opposite to the first direction, the switch controller turns off the switch element, whereby the auxiliary current tripping element is connected into the current flow path to control interruption of current flow.</p> |
