SECONDARY-BATTERY CHARGING SYSTEM AND METHOD AND BATTERY PACK

摘要

A charging system includes battery pack and charger. During the charge of secondary battery, charge control unit controls charger so that the charger performs constant-current charge at a first charge current, and, when at least one of the following conditions is satisfied, switches the first charge current to a second charge current lower than the first charge current and continues the constant-current charge. The conditions include the condition that the SOC of secondary battery arrives at a threshold SOC value and the condition that the inter-terminal voltage of secondary battery arrives at a threshold inter-terminal voltage. In response to the degree of degradation of secondary battery, the charge control unit drops at least one of the threshold SOC value and the threshold inter-terminal voltage.

主权项

1. A charging system of a secondary battery comprising:
a secondary battery; a charger for charging the secondary battery; and charge controlling unit configured to control the charger during charge of the secondary battery so that the charger performs constant-current charge at a first charge current, and, when at least one of conditions is satisfied, switches the first charge current to a second charge current lower than the first charge current and continues the constant-current charge, the conditions being:
an SOC of the secondary battery arrives at a threshold SOC value; andan inter-terminal voltage of the secondary battery arrives at a threshold inter-terminal voltage, wherein, in response to a degree of degradation of the secondary battery, the charge controlling unit drops at least one of the first charge current and the second charge current.