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US 10,566,815 B2Granted
Charge control apparatus, charge pattern creating device, method, non-transitory computer readable medium and power storage system
AssigneeKabushiki Kaisha Toshiba
InventorsYumi Fujita, Tomokazu Morita, Ena Ishii, Nobukatsu Sugiyama, Wataru Aratani
Life of this patent
Estimating the term…
Abstract
A charge control apparatus according to an embodiment controls charge of a secondary battery to be charged, on the basis of a charge pattern which is calculated from inner state parameters of the secondary battery to be charged, and of a deterioration model or deterioration map of a secondary battery. The charge control apparatus updates the charge pattern on the basis of change of the inner state parameters.
Claims14
A charge pattern creating device estimating an inner state parameter of a first battery to be charged and calculating a charge pattern for the first battery based on an estimation value of the inner state parameter of the first battery, the charge pattern creating device comprising:
- a battery characteristic estimator configured to estimate the estimation value of the inner state parameter of the first battery based on data on current and voltage of the first battery measured during charge or discharge of the first battery;
- and
- a charge pattern calculator configured to calculate the charge pattern for the first battery based on a first reference data and a specified value of a first deterioration speed of the first battery, wherein
- the first reference data is reference data considered to correspond to the first battery from the reference data indicating at least a relationship among a second deterioration speed of a secondary battery, one or more reference parameters related to the secondary battery, and a charge current of the secondary battery, wherein the first reference data includes (i) second reference data at least indicating a first relationship among the second deterioration speed of a positive electrode of the secondary battery, the one or more of the reference parameters, and a second upper limit of the positive electrode and (ii) third reference data at least indicating a second relationship among the second deterioration speed of a negative electrode of the secondary battery, the one or more of the reference parameters, and a third upper limit of the charge current in the negative electrode;
- and
- the charge pattern indicates a value of the charge current corresponding to a first reference parameter which is one of the reference parameters.
3 more elements
A method for estimating an inner state parameter of a first battery to be charged and calculating a charge pattern for the first battery based on an estimation value of the inner state parameter of the first battery, the method comprising:
- estimating the estimation value of the inner state parameter of the first battery based on data on current and voltage of the first battery measured during charge or discharge of the first battery;
- and
- calculating the charge pattern for the first battery based on a first reference data and a specified value of a first deterioration speed of the first battery, wherein
- the first reference data is reference data considered to correspond to the first battery from the reference data indicating at least a relationship among a second deterioration speed of a secondary battery, one or more reference parameters related to the secondary battery, and a charge current of the secondary battery, wherein the first reference data includes (i) second reference data at least indicating a first relationship among the second deterioration speed of a positive electrode of the secondary battery, the one or more of the reference parameters, and a second upper limit of the positive electrode and (ii) third reference data at least indicating a second relationship among the second deterioration speed of a negative electrode of the secondary battery, the one or more of the reference parameters, and a third upper limit of the charge current in the negative electrode;
- and
- the charge pattern indicates a value of the charge current corresponding to a first reference parameter which is one of the reference parameters.
3 more elements
A non-transitory computer readable medium storing a program for estimating an inner state parameter of a first battery to be charged and calculating a charge pattern for the first battery based on an estimation value of the inner state parameter of the first battery, the program causing a computer to execute:
- estimating the estimation value of the inner state parameter of the first battery based on data on current and voltage of the first battery measured during charge or discharge of the first battery;
- and
- calculating the charge pattern for the first battery based on a first reference data and a specified value of a first deterioration speed of the first battery, wherein
- the first reference data is reference data considered to correspond to the first battery from the reference data indicating at least a relationship among a second deterioration speed of a secondary battery, one or more reference parameters related to the secondary battery, and a charge current of the secondary battery, wherein the first reference data includes (i) second reference data at least indicating a first relationship among the second deterioration speed of a positive electrode of the secondary battery, the one or more of the reference parameters, and a second upper limit of the positive electrode and (ii) third reference data at least indicating a second relationship among the second deterioration speed of a negative electrode of the secondary battery, the one or more of the reference parameters, and a third upper limit of the charge current in the negative electrode;
- and
- the charge pattern indicates a value of the charge current corresponding to a first reference parameter which is one of the reference parameters.
3 more elements
A power storage system comprising:
- a first battery to be charged;
- and
- a charge control apparatus configured to charge the first battery, wherein
- the charge control apparatus includes:
- a battery characteristic estimator configured to estimate an estimation value of an inner state parameter of the first battery based on data on current and voltage of the first battery measured during charge or discharge of the first battery, and
- a charge pattern calculator configured to calculate a charge pattern for the first battery based on a first reference data and a specified value of a first deterioration speed of the first battery, wherein
- the first reference data is reference data considered to correspond to the first battery from the reference data indicating at least a relationship among a second deterioration speed of a secondary battery, one or more reference parameters related to the secondary battery, and a charge current of the secondary battery, wherein the first reference data includes (i) second reference data at least indicating a first relationship among the second deterioration speed of a positive electrode of the secondary battery, the one or more of the reference parameters, and a second upper limit of the positive electrode and (ii) third reference data at least indicating a second relationship among the second deterioration speed of a negative electrode of the secondary battery, the one or more of the reference parameters, and a third upper limit of the charge current in the negative electrode,
- the charge pattern indicates a value of the charge current corresponding to a first reference parameter which is one of the reference parameters;
- and
- the first battery is charged along the charge pattern.
7 more elements
Dependencies are inferred from the claim text.