Electric storage device
First Claim
1. An electric storage device, comprising:
- an electric storage unit including a plurality of electrically connected electric storage elements;
a first control unit measuring a state of each of the electric storage elements;
a measurement unit measuring a state of the electric storage unit; and
a second control unit which captures measurement state information about each of the electric storage elements measured by the first control unit and measurement state information about the electric storage unit measured by the measurement unit, and manages and controls the state of the electric storage unit, wherein the second control unit includes;
a unit which captures measurement state information about each of the electric storage elements in a no-load state before or after a loaded state where the electric storage unit is connected to a load, and calculates an amount of change of an average state of charge of the electric storage elements in the no-load state before or after the loaded state, and a difference between an average state of charge of the electric storage elements in a no-load state after the loaded state and a state of charge of a predetermined electric storage element, and which further calculates a charge-state variation coefficient which is the difference per amount of change of the average state of charge of the electric storage elements in the no-load state before or after the loaded state; and
a unit which captures the measurement state information about the electric storage unit in the loaded state and calculates an amount of change of the average state of charge of the electric storage elements in the loaded state, and which further predicts a state of charge of a predetermined electric storage element based on the average state of charge of the electric storage elements in the loaded state and the charge-state variation coefficient.
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Accused Products
Abstract
An electric storage device including a state detection unit managing and controlling the state of a battery unit, wherein the state detection unit captures an inter-terminal voltage of each of a plurality of batteries measured by a battery management unit in a no-load state where the battery unit is separated from a load, and calculates variation information about the states of charge of the batteries. In addition, the state detection unit, taking into consideration the variation information about the states of charge of the batteries, calculates allowable charge and discharge information required for controlling the charging and discharging of the battery unit in a loaded state where the battery unit is connected to a load and charged or discharged, and outputs the allowable charge and discharge information to a charge and discharge device in the battery unit.
74 Citations
23 Claims
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1. An electric storage device, comprising:
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an electric storage unit including a plurality of electrically connected electric storage elements; a first control unit measuring a state of each of the electric storage elements; a measurement unit measuring a state of the electric storage unit; and a second control unit which captures measurement state information about each of the electric storage elements measured by the first control unit and measurement state information about the electric storage unit measured by the measurement unit, and manages and controls the state of the electric storage unit, wherein the second control unit includes; a unit which captures measurement state information about each of the electric storage elements in a no-load state before or after a loaded state where the electric storage unit is connected to a load, and calculates an amount of change of an average state of charge of the electric storage elements in the no-load state before or after the loaded state, and a difference between an average state of charge of the electric storage elements in a no-load state after the loaded state and a state of charge of a predetermined electric storage element, and which further calculates a charge-state variation coefficient which is the difference per amount of change of the average state of charge of the electric storage elements in the no-load state before or after the loaded state; and a unit which captures the measurement state information about the electric storage unit in the loaded state and calculates an amount of change of the average state of charge of the electric storage elements in the loaded state, and which further predicts a state of charge of a predetermined electric storage element based on the average state of charge of the electric storage elements in the loaded state and the charge-state variation coefficient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An electric storage device, comprising:
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an electric storage unit including a plurality of electrically connected electric storage elements; a first control unit measuring a state of each of the electric storage elements; a measurement unit measuring a state of the electric storage unit; and a second control unit which captures measurement state information about each of the electric storage elements measured by the first control unit and measurement state information about the electric storage unit measured by the measurement unit, and manages and controls a state of the electric storage unit, wherein the second control unit includes; a unit which captures measurement state information about each of the electric storage elements in a no-load state before or after a loaded state where the electric storage unit is connected to a load, and calculates an amount of change of an average state of charge of the electric storage elements in the no-load state before or after the loaded state, and a difference between an average state of charge of the electric storage elements in a no-load state after the loaded state and the respective maximum and minimum states of charge of the electric storage elements, and which further calculates a charge-state variation coefficient which is the difference per amount of change of the average state of charge of the electric storage elements in the no-load state before or after the loaded state, respectively; and a unit which captures the measurement state information about the electric storage unit in the loaded state and calculates an amount of change of the average state of charge of the electric storage elements in the loaded state, and which further multiplies the average state of charge of the electric storage elements in the loaded state by the charge-state variation coefficient, respectively, thereby predicting the respective maximum and minimum states of charge of the electric storage elements.
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22. An electric storage device, comprising:
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an electric storage unit including a plurality of electrically connected electric storage elements; a first control unit measuring a state of each of the electric storage elements; a measurement unit measuring a state of the electric storage unit; and a second control unit which captures measurement state information about each of the electric storage elements measured by the first control unit and measurement state information about the electric storage unit measured by the measurement unit, and manages and controls a state of the electric storage unit, wherein the second control unit includes; a unit which captures measurement state information about each of the electric storage elements in a no-load state before or after a loaded state where the electric storage unit is connected to a load, and calculates an amount of change of a state of charge of each of the electric storage elements in the no-load state before and after the loaded state and an amount of change of an average state of charge of the electric storage elements in a no-load state before and after the loaded state, and which further calculates a charge-state variation coefficient which is an amount of change of the state of charge of each of the electric storage elements per amount of change of the average state of charge of the electric storage elements, respectively; and a unit which captures the measurement state information about the electric storage unit in the loaded state and calculates an amount of change of the average state of charge of the electric storage elements in the loaded state, and which further multiplies the average state of charge of the electric storage elements in the loaded state by each of the charge-state variation coefficients, thereby predicting a state of charge of each of the electric storage elements. - View Dependent Claims (23)
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Specification