US 5,635,820 A · Battery charging control device and method for accurately detecting a charging end state

Abstract

The present invention discloses a controlling device and a method for charging a battery for an electric vehicle which improves the battery consumption ratio and its stability. The charge controlling device includes a battery temperature sensing member, a battery voltage sensing member, a current sensing member, a charging mode switch, a charge control device. When the predetermined charging mode is a constant current/constant voltage method, if the battery temperature is above the maximum predetermined temperature, a charging end signal is produced. If the battery temperature is below the minimum predetermined temperature, the full-charging state is determined in accordance with the measured current value and the charging end signal is produced. On the other hand, when the predetermined charging mode is a constant current charging mode, if the battery temperature is below the minimum predetermined temperature, the battery voltage drop state is determined. IF the battery voltage drop occurs below the predetermined voltage, the charging end signal is produced in accordance with the charging limit time, and a battery charging member.

Claims28

Dependent claims

A method for controlling charging of a battery, comprising:

(a) sensing a predetermined charging mode of said battery;
(b) detecting a temperature of said battery;
(c) determining whether charging of said battery is complete based on said detected temperature;
(d) detecting a charging current of said battery if said step (c) does not determine that charging of said battery is complete and said step (a) senses a first charging mode;
(e) determining whether charging of said battery is complete based on said detected current when said step (c) does not determine that charging of said battery is complete and said step (a) senses said first charging mode;
(f) detecting a voltage of said battery if said step (c) does not determine that charging of said battery is complete and said step (a) senses a second charging mode;
and
(g) determining whether charging of said battery is complete based on said detected voltage when said step (c) does not determine that charging of said battery is complete and said step (a) senses said second charging mode;
and
(h) controlling a battery charging operation based on a determination made in one of said steps (c), (e) and (g).

7 more elements

Dependencies are inferred from the claim text.

Battery charging control device and method for accurately detecting a charging end state

Life of this patent

Battery charging control device and method for accurately detecting a charging end state

Life of this patent

Abstract

Claims28