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Battery charging control device and method for accurately detecting a charging end state
| Details |
Inventors: Park, Hae-Woo;
Assignee: Hyundai Motor Company (Seoul, KR)
Primary Examiner: Tso; Edward
Assistant Examiner:
Attorney, Agent or Firm:
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. |
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DETAILED DESCRIPTION To solve the above conventional technical problems, it is an object of the present invention to provide a controlling device and a method for charging a battery for an electric vehicle that may improve the battery consumption ratio and its stability by sensing a charging end state in accordance with a charging temperature, a charging voltage and a current of its charging/discharging as a result of collectively applying all methods capable of sensing the charging end state.
To achieve the objects, a controlling device for charging a battery for an electric vehicle, as embodied and broadly described herein, includes: battery temperature sensing means for sensing the temperature of a battery, converting the temperature into an electric signal and producing the signal; a battery voltage sensing means for sensing the charging voltage of the battery, converting the charging voltage into an electric signal and producing the signal; current sensing means for measuring a current in charging/discharging of the battery and producing the corresponding electric signal; a charging mode switch for determining the charging mode of the battery; charge control means, when the predetermined charging mode is a constant current/constant voltage method, in case of the battery temperature is above the maximum predetermined temperature, producing a charging end signal, in case the battery temperature is below the minimum predetermined temperature, for determining the full-charging state in accordance with the measured current value and producing the charging end signal, on the other hand, when the predetermined charging mode is a constant current charging mode, in case of the battery temperature is below the minimum predetermined temperature, for determining the battery voltage drop state, in case of the battery voltage drop occurs below the predetermined voltage, for producing the charging end signal in accordance with the charging limit time; and battery charging means for carrying out the charging operation of the battery in accordance with the signal from the charge control means
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