Method and device for managing batteries of a battery system

Details Method and device for managing batteries of a battery system Method and device for managing batteries of a battery system

2004-12-03

2009-12-29

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With individual charging of plural batteries or cells

C320S116000, C320S118000

Reexamination Certificate

active

07638974

ABSTRACT:
Method for managing a battery system including a number of serially coupled batteries in a flexible, reliable, and cost effective way and that can be used in a wide variety of applications, such as tools, for example, hand tools, cars, boats, back-up systems, buses, trucks, golf carts, wheel chairs, electric cars and fork-lift trucks. The method includes the steps of detecting the battery voltage over each individual battery of the battery system; and utilizing a voltage imbalance between different batteries of the system during operation of the battery system. Furthermore, the method controls the voltage distribution of the batteries to create a voltage imbalance between different batteries of the battery system.

REFERENCES:
patent: 5656920 (1997-08-01), Cherng et al.
patent: 6046573 (2000-04-01), Wikström
patent: 6275004 (2001-08-01), Tamai et al.
patent: 6545445 (2003-04-01), McDermott et al.
International Search Report of PCT/SE2004/001797, mailed Mar. 8, 2005.

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