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    • 21. 发明专利
    • BATTERY PACK, SYSTEM AND CHARGING METHOD
    • JP2000032674A
    • 2000-01-28
    • JP16529799
    • 1999-06-11
    • BLACK & DECKER INC
    • BROTTO DANIELE C
    • H02J7/00
    • PROBLEM TO BE SOLVED: To optimize the charging coefficient of various batteries to avoid over-charging of battery by conducting the charging through recognition of battery capacity and determination of sampling interval depending on the battery capacity. SOLUTION: A battery recognizing element 17 (resistor Rid) is connected between an IDP terminal and a terminal B-. An analog signal generated by voltage drop of resistor Rid is then input to a controller 21. For example, when an ID value indicating the range of voltage drop is mapped and programmed in the controller 21, type and capacity of battery can be determined. Here, ID value 50 to 106 →Ni-Cd battery, 112 to 160 → NiMH battery, 189 to 230 →lead battery or lithium-ion battery. The controller 21 corrects the charging parameters such as charging voltage, current, time in order to avoid minimization of charging time and/or over-charging. Moreover, the charging coefficient corresponds to the sampling interval and defined as the C rate characteristic (charger current output/battery capacity).
    • 23. 发明专利
    • BATTERY CHARGING METHOD
    • JPH11168840A
    • 1999-06-22
    • JP23169098
    • 1998-08-18
    • BLACK & DECKER INC
    • BROTTO DANIELE C
    • H01M10/44H02J7/00H02J7/10
    • PROBLEM TO BE SOLVED: To provide a method with which a rechargeable battery is charged and monitored. SOLUTION: By a charging method, a rechargeable battery 10 is charged, the temperature of the battery 10 is detected, and a temperature change rate is calculated. Further, through the method, after the temperature change rate reaches a predetermined value, the voltage of the battery 10 is detected, a voltage change rate is calculated, and if the voltage change rate reaches a predetermined value, a current supplied to the battery is reduced. After the temperature change rate reaches a predetermined value, a maximum voltage change rate is detected, but if the maximum voltage change rate is detected, the current supplied to the battery is reduced. Further, a minimum voltage change rate before the maximum voltage change rate is detected is detected, and the detection of the maximum change rate is started after the temperature change rate reaches the predetermined value or after the minimum voltage change rate is detected.
    • 24. 发明专利
    • BATTERY CHARGING METHOD
    • JP2000032679A
    • 2000-01-28
    • JP16501899
    • 1999-06-11
    • BLACK & DECKER INC
    • BROTTO DANIELE C
    • H02J7/10H01M10/44H02J7/00
    • PROBLEM TO BE SOLVED: To avoid generation of a battery which is charged insufficiently by invalidating the end of charging method based on temperature when a temperature changing rate has exceeded the first threshold value within the predetermined period and the validating again when the temperature changing rate becomes smaller than the second threshold value. SOLUTION: A controller calculates a temperature changing coefficient (dT/dt). When dT/dt is smaller than the threshold value X, it is determined whether a counter value is higher than or equal to the threshold value A. When the counter value is higher than the threshold value A, battery charging is continued (ST5 to ST9). When dT/dt is larger than the threshold value X, end of charging process based on the temperature is invalidated. Next, battery temperature is detected and dT/dt is calculated to determine the comparison result of comparison with threshold value Y (ST11 to ST14). The controller repeats these steps until the predetermined time has passed while the dT/dt becomes smaller than the threshold value Y. When any condition is matched, end of the charging process based on the temperature is validated again.