Determination of battery predictive power limits
First Claim
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1. A battery control module for use with a battery, comprising:
- a voltage measuring module that measures battery voltage;
a current measuring module that measures battery current; and
a power limit module that communicates with the current and voltage measuring modules and that once every time period estimates a battery current limit that corresponds with a future time period, wherein the battery current limit is based on a predetermined voltage limit of the battery and a battery current and a battery voltage that correspond with a time period that precedes the future time period.
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Abstract
A battery control module for use with a battery includes a voltage measuring module that measures battery voltage and a current measuring module that measures battery current. A power limit module communicates with the current and voltage measuring modules and once every time period estimates a battery current limit that corresponds with a future time period. The battery current limit is based on a predetermined voltage limit of the battery and a battery current and a battery voltage that correspond with a time period that precedes the future time period.
27 Citations
24 Claims
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1. A battery control module for use with a battery, comprising:
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a voltage measuring module that measures battery voltage; a current measuring module that measures battery current; and a power limit module that communicates with the current and voltage measuring modules and that once every time period estimates a battery current limit that corresponds with a future time period, wherein the battery current limit is based on a predetermined voltage limit of the battery and a battery current and a battery voltage that correspond with a time period that precedes the future time period. - View Dependent Claims (2, 3, 4, 5)
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6. A hybrid power supply system for a load, comprising:
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a first power source that provides power to the load based on a power demand signal; a rechargeable battery that provides power to the load; and a control module in communication with the rechargeable battery, comprising; a voltage measuring module that measures battery voltage; a current measuring module that measures battery current; and a power limit module that communicates with the current and voltage measuring modules, wherein the power limit module estimates a battery current limit based on the battery current, the battery voltage, and a predetermined voltage limit of the battery, and wherein the power limit module generates the power demand signal based on the battery current limit. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method for controlling current draw from a battery, comprising:
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measuring a battery voltage; measuring a battery current; and periodically estimating a battery current limit that corresponds with a future time period and represents a maximum allowable battery current through the battery, wherein the battery current limit is based on the measured battery current, the measured battery voltage, and a predetermined voltage limit of the battery. - View Dependent Claims (13, 14)
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15. A method for controlling a hybrid power supply system, comprising:
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operating a first power source to provide power to a load based on a power demand signal; supplying power to the load from a rechargeable battery; measuring a battery voltage of the rechargeable battery; measuring a battery current of the rechargeable battery; periodically estimating a battery current limit that corresponds with a future time period and represents a maximum allowable battery current through the battery; and generating the power demand signal based on the estimated battery current limit, wherein the battery current limit is based on the measured battery current, the measured battery voltage, and a predetermined voltage limit of the battery - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A powertrain system for a hybrid electric vehicle, comprising:
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a rechargeable battery that provides power to an electric motor for propelling the vehicle; an internal combustion engine that generates power for propelling the vehicle; an engine controller that starts the internal combustion engine in response to a power demand signal; and a control module in communication with the rechargeable battery, comprising; a voltage measuring module that measures battery voltage; a current measuring module that measures battery current; and a power limit module that communicates with the current and voltage measuring modules, wherein the power limit module periodically determines a battery current limit corresponding to a future period and based on the battery current and the battery voltage; and wherein the power limit module generates the power demand signal based on the battery current limit such that the engine controller starts the internal combustion engine prior to the future period. - View Dependent Claims (24)
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Specification