Battery management system for electric vehicle
First Claim
1. A battery management system for an electric vehicle having an electric charger for charging an electricity to a high voltage battery and an auxiliary battery, a motor for driving said vehicle, a key switch electrically connected to said high voltage battery for starting said motor, and control means connected to control said motor at an optimum condition for each driving condition of said vehicle, comprising:
- detecting means attached to said high voltage battery for sensing a battery condition when said key switch is ON and for generating a battery condition signal indicative thereof;
calculating means responsive to said battery condition signal as an analog signal for changing the analog signal into digital signals and for producing a digital battery condition signal indicative thereof;
memory means for storing said digital battery condition signal;
activating means responsive to said digital battery condition signal for activating both of said detecting means and said calculating means for a predetermined time period by real time clock (RTC) generating means when said key switch is OFF and for generating an activating signal; and
outputting means responsive to said activating signal for transferring said digital battery condition signal to said control means so as to reduce power consumption of said high voltage battery and said auxiliary battery and to effectively avoid entirely exhausting thereof.
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Accused Products
Abstract
A battery monitoring routine is executed at a short period such as one minute as an initial value when a key switch is turned on to drive an electric vehicle (so that the battery is discharged). On the other hand, when the key switch is turned off to stop or park the electric vehicle so that the battery is released open from discharge, the battery monitoring routine is executed at a short period such as one minute to measure the battery data finely within a specified time such as 30 minutes, but at a long period such as one hour to measure the battery data coarsely after the specified time such as 30 minutes to save monitoring power. The battery deterioration can be monitored by measuring the restoration status of the battery after released open from discharge, for recharging or replacement of the battery.
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Citations
8 Claims
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1. A battery management system for an electric vehicle having an electric charger for charging an electricity to a high voltage battery and an auxiliary battery, a motor for driving said vehicle, a key switch electrically connected to said high voltage battery for starting said motor, and control means connected to control said motor at an optimum condition for each driving condition of said vehicle, comprising:
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detecting means attached to said high voltage battery for sensing a battery condition when said key switch is ON and for generating a battery condition signal indicative thereof; calculating means responsive to said battery condition signal as an analog signal for changing the analog signal into digital signals and for producing a digital battery condition signal indicative thereof; memory means for storing said digital battery condition signal; activating means responsive to said digital battery condition signal for activating both of said detecting means and said calculating means for a predetermined time period by real time clock (RTC) generating means when said key switch is OFF and for generating an activating signal; and outputting means responsive to said activating signal for transferring said digital battery condition signal to said control means so as to reduce power consumption of said high voltage battery and said auxiliary battery and to effectively avoid entirely exhausting thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification