Method and device for determining battery status
First Claim
1. A method for battery state identification for a motor vehicle, having the following steps:
- (S1) measurement of a voltage of a motor vehicle battery (5) during the starting process of a motor vehicle over a predetermined time period, (S2) determination of a minimum voltage level of the motor vehicle battery (5) during the predetermined time period of the measurement process, (S3-1 to S3-3;
S3-0 to S3-3*) assessment of a state of charge of the motor vehicle battery (5) on the basis of the determined minimum voltage level, (S4-1 to S4-3) control of a generator as a function of the assessment of the state of charge of the motor vehicle battery (5), so as to ensure an adequate supply for the vehicle power supply system and adequate charging of the motor vehicle battery (5), while at the same time optimizing the fuel consumption and the emissions.
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Accused Products
Abstract
The invention relates to a method and an apparatus for battery state identification. The battery state is determined by measurement of the voltage of a motor vehicle battery during the starting process over a predetermined time period, determination of a minimum voltage level of the motor vehicle battery during the predetermined time period of the measurement process, assessment of the state of charge of the vehicle battery on the basis of the minimum voltage level, and control of the generator as a function of the assessment of the state of charge of the motor vehicle battery, thus ensuring an adequate supply to the vehicle power supply system and adequate charging of the vehicle battery, while at the same time optimizing the fuel consumption and the emissions. The generator is driven as a function of the determined state of charge and, optionally, the ambient temperature, by predetermining either a nominal value of the charging voltage at the normal charging level, a nominal value of the charging voltage for engine load reduction, a nominal value of the charging voltage at a reduced vehicle power supply system level, or a nominal value of the charging voltage at the recuperation level.
15 Citations
17 Claims
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1. A method for battery state identification for a motor vehicle, having the following steps:
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(S1) measurement of a voltage of a motor vehicle battery (5) during the starting process of a motor vehicle over a predetermined time period, (S2) determination of a minimum voltage level of the motor vehicle battery (5) during the predetermined time period of the measurement process, (S3-1 to S3-3;
S3-0 to S3-3*) assessment of a state of charge of the motor vehicle battery (5) on the basis of the determined minimum voltage level,(S4-1 to S4-3) control of a generator as a function of the assessment of the state of charge of the motor vehicle battery (5), so as to ensure an adequate supply for the vehicle power supply system and adequate charging of the motor vehicle battery (5), while at the same time optimizing the fuel consumption and the emissions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for battery state identification for a motor vehicle, having:
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a device (8) for measurement of a voltage of a motor vehicle battery (5) during the starting process of a motor vehicle over a predetermined time period, a device (7) for determination of a minimum level of the motor vehicle battery (5) during the predetermined time period of the measurement process, a device (7) for assessment of a state of charge of the motor vehicle battery (5) on the basis of the determined minimum voltage level, and a device (7) for controlling a generator (4) as a function of the assessment of the state of charge of the motor vehicle battery (5) in such a way that an adequate supply is ensured for the vehicle power supply system and adequate charging of the motor vehicle battery (5) is ensured, with the fuel consumption and the emissions being optimized at the same time. - View Dependent Claims (14, 15, 16, 17)
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Specification