Battery management system for electric vehicle
First Claim
1. A battery management system for an electric vehicle, comprising:
- detecting means for detecting various battery conditions of a car battery mounted on the electric vehicle;
management means for monitoring a battery status of the car battery in dependency on the various battery conditions detected by said detecting means;
storing means for storing the battery status monitored by said management means;
key switching means connected to an auxiliary battery, for activating said detecting means and said management means whenever turned on; and
activating means associated with said key switching means, for periodically activating said detecting means and said management means when said key switching means is turned off.
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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.
43 Citations
26 Claims
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1. A battery management system for an electric vehicle, comprising:
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detecting means for detecting various battery conditions of a car battery mounted on the electric vehicle; management means for monitoring a battery status of the car battery in dependency on the various battery conditions detected by said detecting means; storing means for storing the battery status monitored by said management means; key switching means connected to an auxiliary battery, for activating said detecting means and said management means whenever turned on; and activating means associated with said key switching means, for periodically activating said detecting means and said management means when said key switching means is turned off. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of managing a battery mounted on an electric vehicle, comprising the steps of:
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checking whether a real time clock (RTC) is being started to activate a battery monitoring routine intermittently after the battery is released open from discharge; executing a battery monitoring routine at a short monitoring start period when said RTC is not being started to activate the battery monitoring routine; determining a long monitoring start period (Δ
T) according to restoration status of battery terminal voltage obtained after the battery has been released open from discharge when said RTC is being started to activate the battery monitoring routine, the long monitoring start period being longer than the short monitoring start period;changing the period (T1) of the real time clock to the determined monitoring start period (Δ
T);processing monitored battery data to detect battery status for recharging or replacement. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification