Battery section balancing methods and systems
First Claim
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1. A method for balancing battery states of charge in a multi-sectioned battery, the method comprising the steps of:
- determining a state of health of a first section of a multi-sectioned battery;
determining a state of health of a second section of a multi-sectioned battery;
determining a relationship between a difference between the state of health of the first section and the state of health of the second section and a difference between a state of charge of the first section and a state of charge of the second section after a first time period;
receiving a current state of charge of the first section;
receiving a current state of charge of the second section; and
using the relationship and the current states of charges of the first and second sections to redistribute energy between the first section and the second section in order to reduce a spread between a state of charge of the first section and a state of charge of the second section during use of the multi-sectioned battery.
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Abstract
Methods and systems for balancing battery states of charge in a multi-sectioned battery. In some embodiments, states of health and states of charge of one or more sections of a multi-sectioned battery may be determined. A relationship between the states of charge and states of health of the battery sections may be determined. This information may be used apply a balancing algorithm to redistribute energy between the various battery sections in order to reduce a spread between the states of charge due to the varying states of health.
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Citations
20 Claims
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1. A method for balancing battery states of charge in a multi-sectioned battery, the method comprising the steps of:
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determining a state of health of a first section of a multi-sectioned battery; determining a state of health of a second section of a multi-sectioned battery; determining a relationship between a difference between the state of health of the first section and the state of health of the second section and a difference between a state of charge of the first section and a state of charge of the second section after a first time period; receiving a current state of charge of the first section; receiving a current state of charge of the second section; and using the relationship and the current states of charges of the first and second sections to redistribute energy between the first section and the second section in order to reduce a spread between a state of charge of the first section and a state of charge of the second section during use of the multi-sectioned battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A vehicle system for balancing battery states of charge in a multi-sectioned battery of the vehicle, comprising:
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a vehicle battery system comprising a plurality of battery sections; and a battery balancing system coupled to the plurality of battery sections and configured to redistribute energy between the plurality of battery sections, wherein the balancing system is configured to assess states of health of at least a subset of the plurality of battery sections and current states of charge of at least a subset of the plurality of battery sections, wherein the balancing system is configured to use the states of health and the current states of charge to apply a balancing algorithm, and wherein the balancing algorithm is configured to establish an equilibrium point at which the states of charge of the at least a subset of the plurality of battery sections are at least approximately equal and to balance the states of charge of the at least a subset of the plurality of battery sections around the equilibrium point such that the states of charge of the at least a subset of the plurality of battery sections vary during vehicle operation around the equilibrium point according to their respective states of health. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A vehicle, comprising:
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a vehicle battery system comprising a plurality of battery sections; a plurality of sensors coupled to the plurality of battery sections, wherein the sensors are configured to obtain data used to determine states of health and states of charge of the plurality of battery sections; and a battery balancing system coupled to the plurality of battery sections and configured to redistribute energy between the plurality of battery sections, wherein the balancing system is configured to receive data from the sensors regarding states of health of the plurality of battery sections and states of charge of the plurality of battery sections and apply a balancing algorithm to the plurality of battery sections to redistribute energy between the plurality of battery sections according to the balancing algorithm, and wherein the balancing algorithm is configured to establish an equilibrium point at which the states of charge of the plurality of battery sections are at least approximately equal and to balance the states of charge of the plurality of battery sections around the equilibrium point such that the states of charge of the plurality of battery sections vary during vehicle operation around the equilibrium point according to their respective states of health.
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Specification