Buck-boost converter with dual-mode control for battery charging

Details Buck-boost converter with dual-mode control for battery charging Buck-boost converter with dual-mode control for battery charging

1983-07-14

1985-08-20

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 27, 320 32, 320 39, 323344, H02J 710, H02M 700

Patent

active

045366969

ABSTRACT:
A voltage controlled flyback converter used as a battery charging circuit avoids the power dissipation of the more conventional series-type regulator-type charging circuits but cannot be readily utilized because of the high gain in the feedback loop due to the battery voltage, which causes instabilities therein when it is operated in a continuous current mode.
These instabilities are avoided in a flyback converter used for battery charging by using current control techniques to control current on the primary side of the converter during high-rate battery charging. During low-rate charging, normal voltage feedback from an output current sensing resistor is used as long as the converter operates in a discontinuous mode.

REFERENCES:
patent: 4260943 (1981-04-01), Zaderej et al.
patent: 4384321 (1983-05-01), Rippel
patent: 4395639 (1983-07-01), Bring
patent: 4472672 (1984-09-01), Pacholok

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