| 摘要 |
A method and apparatus for battery charging in which over and under charge is prevented by taking into account the fact that the full charge voltage of a battery may vary with the age or condition of the battery. A battery charger (20) charges a battery (11), preferably in a battery pack (10), by providing an initial battery charging current (I1) and terminating the initial charging current at a time t2 in response to a measured battery condition (for example, battery temperature rate of change; Delta T/Delta t) exceeding a limit. A battery parameter, preferably battery voltage, is measured at the time t2 and stored as a limit (Vpeak). After t2, battery charging current is provided in accordance with a predetermined criteria and battery response to comparing a measured battery parameter, preferably battery voltage, after t2 to a threshold (vpeak; or Vpeak - Delta V) based on the stored limit (Vpeak). Preferably, rapid battery charging is implemented in response to a comparison of a measured battery parameter, preferably battery voltage, after the time t2 with respect to a threshold (Vpeak - Delta V) determined in accordance with the stored limit (Vpeak). |
