Secondary battery management system
First Claim
1. A method of managing a battery system, the battery system including at least one battery cell, at least one sensor coupled to the at least one battery cell and configured to measure at least one characteristic of the battery cell, and a battery management system coupled to the at least one sensor and including a microprocessor and a memory, the method comprising:
- receiving, by the battery management system, at least one measured characteristic of the battery cell over a pre-defined time horizon from the at least one sensor;
receiving, by the battery management system, at least one estimated characteristic of the battery cell from a electrochemical-based battery model based on differential algebraic equations;
determining, by the battery management system, a cost function of a Moving Horizon Estimation method based on the at least one measured characteristic and the at least one estimated characteristic by determining an error between the at least one measured characteristic and the at least one estimated characteristic; and
determining an arrival cost by comparing the error to a predetermined threshold, the arrival cost having a weight based on previously estimated states and parameters;
updating, by the battery management system, the electrochemical-based battery model based on the cost function of the Moving Horizon Estimation;
estimating, by the battery management system, at least one state of the at least one battery cell by applying the electrochemical-based battery model that applies differential algebraic equations to account for physical parameters of a chemical composition of the at least one battery cell; and
regulating, by the battery management system, at least one of charging or discharging of the battery based on the estimation of the at least one state of the at least one battery cell.
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Abstract
A method and system for managing a battery system. The method including receiving at least one measured characteristic of the battery over a pre-defined time horizon from the at least one sensor, receiving at least one estimated characteristic of the battery from a electrochemical-based battery model based on differential algebraic equations, determining a cost function of a Moving Horizon Estimation based on the at least one measured characteristic and the at least one estimated characteristic, updating the electrochemical-based battery model based on the cost function, estimating at least one state of the at least one battery cell by applying the electrochemical-based battery model, and regulating at least one of charging or discharging of the battery based on the estimation of the at least one state of the at least one battery cell.
80 Citations
20 Claims
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1. A method of managing a battery system, the battery system including at least one battery cell, at least one sensor coupled to the at least one battery cell and configured to measure at least one characteristic of the battery cell, and a battery management system coupled to the at least one sensor and including a microprocessor and a memory, the method comprising:
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receiving, by the battery management system, at least one measured characteristic of the battery cell over a pre-defined time horizon from the at least one sensor; receiving, by the battery management system, at least one estimated characteristic of the battery cell from a electrochemical-based battery model based on differential algebraic equations; determining, by the battery management system, a cost function of a Moving Horizon Estimation method based on the at least one measured characteristic and the at least one estimated characteristic by determining an error between the at least one measured characteristic and the at least one estimated characteristic; and determining an arrival cost by comparing the error to a predetermined threshold, the arrival cost having a weight based on previously estimated states and parameters; updating, by the battery management system, the electrochemical-based battery model based on the cost function of the Moving Horizon Estimation; estimating, by the battery management system, at least one state of the at least one battery cell by applying the electrochemical-based battery model that applies differential algebraic equations to account for physical parameters of a chemical composition of the at least one battery cell; and regulating, by the battery management system, at least one of charging or discharging of the battery based on the estimation of the at least one state of the at least one battery cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A battery management system comprising a processor and a memory storing instructions that, when executed by the processor, cause the battery management system to:
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receive at least one measured characteristic of at least one battery cell over a pre-defined time horizon from at least one sensor, wherein the at least one battery cell and the at least one sensor are part of a battery system; receive at least one estimated characteristic of the at least one battery cell from an electrochemical-based battery model based on differential algebraic equations; determine a cost function of a Moving Horizon Estimation based on the at least one measured characteristic and the at least one estimated characteristic by determining an error between the at least one measured characteristic and the at least one estimated characteristic; and determining an arrival cost by comparing the error to a predetermined threshold, the arrival cost having a weight based on previously estimated states and parameters; update the electrochemical-based battery model based on the cost function of the Moving Horizon Estimation; estimate at least one state of the at least one battery cell by applying the electrochemical-based battery model that applies differential algebraic equations to account for physical parameters of a chemical composition of the at least one battery cell; and regulate at least one of charging or discharging of the battery based on the estimation of the at least one state of the at least one battery cell. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of managing a battery system, the battery system including at least one battery cell, at least one sensor coupled to the at least one battery cell and configured to measure at least one characteristic of the battery cell, and a battery management system coupled to the at least one sensor and including a microprocessor and a memory, the method comprising:
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receiving, by the battery management system, at least one measured characteristic of the battery cell over a pre-defined time horizon from the at least one sensor; receiving, by the battery management system, at least one estimated characteristic of the battery cell from an electrochemical-based battery model based on differential algebraic equations; determining, by the battery management system, a cost function of a Moving Horizon Estimation method based on the at least one measured characteristic and the at least one estimated characteristic by determining an error between the at least one measured characteristic and the at least one estimated characteristic; and determining an arrival cost that has a weight based on previously estimated states and parameters; when the error is less than a predetermined threshold, updating by the battery management system, the electrochemical-based battery model based on the cost function of the Moving Horizon Estimation; when the error is greater than the predetermined threshold, modifying states and parameters of the battery model using an estimate modifier and reevaluating until the error is less than the predetermined threshold indicating that the battery model is accurate; estimating, by the battery management system, at least one state of the at least one battery cell by applying the electrochemical-based battery model that applies differential algebraic equations to account for physical parameters of a chemical composition of the at least one battery cell; and regulating, by the battery management system, at least one of charging or discharging of the battery based on the estimation of the at least one state of the at least one battery cell. - View Dependent Claims (20)
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Specification