System and method for controlling charging of secondary battery

Details System and method for controlling charging of secondary battery System and method for controlling charging of secondary battery

1997-01-29

1998-02-24

Tso, Edward

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 49, H01M 1046

Patent

active

057214808

ABSTRACT:
In a system for charging a rechargeable battery with constant voltage, a power supply supplies a voltage increased with time. An overvoltage generating circuit outputs an overvoltage signal for a first predetermined period when a supplied voltage to the rechargeable battery exceed a reference voltage. In response to the overvoltage signal from the overvoltage generating circuit, a multivibrator gradually drops the voltage from the power supply for a second predetermined period being longer than the first period. A sample/hold circuit holds the voltage from the power supply when a control signal is not supplied, and samples the voltage from the power supply when the control signal is supplied. A comparator compares the voltage from the power supply with a held voltage of the sample/hold circuit, and generates a signal when the voltage from the power supply is higher than the held voltage of the sample/hold circuit. A logical sum circuit supplies the control signal to the sample/hold circuit in response to the signal from the comparator or the overvoltage signal from the overvoltage generating circuit. A voltage follower supplies the held or the sampled voltage from the sample/hold circuit to the rechargeable battery.

REFERENCES:
patent: 5397979 (1995-03-01), Yamamoto
patent: 5581772 (1996-12-01), Nanno et al.
patent: 5617007 (1997-04-01), Keidl et al.
Benjamin C. Kuo, Digital Conrol Systems pp. 22-27, 64-67; (English translations), no date.
Data Acquisition Databook 1995 Edition, pp. 6-4--6-14.

Affiliated with

Also associated with

Rating

System and method for controlling charging of secondary battery does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method for controlling charging of secondary battery , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for controlling charging of secondary battery will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1877003