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US 12,596,853 B2Granted
Development support apparatus, development support method, and state detection method
AssigneeGS Yuasa International Ltd.
InventorsKatsuyuki Sato, Muhammad Syahid Fitri Bin Azahar
Life of this patent
Estimating the term…
Abstract
A development support apparatus includes: an estimation unit that estimates behavior of an energy storage device by using an equivalent circuit model reflecting a state of charge (SOC)-operating voltage characteristic in a high change-amount region where an amount of change in an operating voltage with respect to an amount of change in the SOC is relatively higher than in other regions among SOC-operating voltage characteristics during constant current charge and discharge of the energy storage device; and an output unit that outputs a result of an estimation by the estimation unit.
Claims4
A development support apparatus comprising:
- an estimation unit that estimates behavior of an energy storage device by using an equivalent circuit model reflecting a state of charge (SOC)-operating voltage characteristic during constant current charge and discharge of the energy storage device in a high change-amount region where an amount of change in an operating voltage with respect to an amount of change in a SOC of the energy storage device is relatively higher than in other regions among SOC-operating voltage characteristics during constant current charge and discharge of the energy storage device;
- and
- an output unit that outputs a result of an estimation by the estimation unit,
- wherein the energy storage device is a lead-acid battery,
- the SOC-operating voltage characteristic includes a first polarization characteristic and a second polarization characteristic,
- the equivalent circuit model includes
- a resistor that simulates a direct current (DC) resistance component of the energy storage device,
- a first RC parallel circuit that simulates the first polarization characteristic of the energy storage device showing a transient response during constant current charge and discharge of the energy storage device characterized by a first time constant, and
- a second RC parallel circuit that simulates the second polarization characteristic of the energy storage device showing a transient response during constant current charge and discharge of the energy storage device characterized by a second time constant larger than the first time constant,
- respective values of a resistive device and a capacitive device included in the second RC parallel circuit are set on a basis of the SOC-operating voltage characteristic during constant current charge and discharge of the energy storage device in the high change-amount region, and
- values of respective resistive devices included in the first RC parallel circuit and the second RC parallel circuit are set on a basis of a charge voltage-polarization voltage characteristic.
8 more elements
A development support method using a computer, the development support method comprising:
- estimating behavior of an energy storage device by using an equivalent circuit model reflecting a state of charge (SOC)-operating voltage characteristic during constant current charge and discharge of the energy storage device in a high change-amount region where an amount of change in an operating voltage with respect to an amount of change in a SOC of the energy storage device is relatively higher than in other regions among SOC-operating voltage characteristics during constant current charge and discharge of the energy storage device;
- and
- outputting an estimation result of the behavior of the energy storage device,
- wherein the energy storage device is a lead-acid battery,
- the SOC-operating voltage characteristic includes a first polarization characteristic and a second polarization characteristic,
- the equivalent circuit model includes
- a resistor that simulates a direct current (DC) resistance component of the energy storage device,
- a first RC parallel circuit that simulates the first polarization characteristic of the energy storage device showing a transient response during constant current charge and discharge of the energy storage device characterized by a first time constant, and
- a second RC parallel circuit that simulates the second polarization characteristic of the energy storage device showing a transient response during constant current charge and discharge of the energy storage device characterized by a second time constant larger than the first time constant,
- respective values of a resistive device and a capacitive device included in the second RC parallel circuit are set on a basis of the SOC-operating voltage characteristic during constant current charge and discharge of the energy storage device in the high change-amount region, and
- values of respective resistive devices included in the first RC parallel circuit and the second RC parallel circuit are set on a basis of a charge voltage-polarization voltage characteristic.
8 more elements
A state detection method using a computer, the state detection method comprising
- estimating a battery state from a measured value of an energy storage device by using an equivalent circuit model reflecting a state of charge (SOC)-operating voltage characteristic during constant current charge and discharge of the energy storage device in a high change-amount region where an amount of change in an operating voltage with respect to an amount of change in a SOC of the energy storage device is relatively higher than in other regions among SOC-operating voltage characteristics during constant current charge and discharge of the energy storage device,
- wherein the energy storage device is a lead-acid battery,
- the SOC-operating voltage characteristic includes a first polarization characteristic and a second polarization characteristic,
- the equivalent circuit model includes
- a resistor that simulates a direct current (DC) resistance component of the energy storage device,
- a first RC parallel circuit that simulates the first polarization characteristic of the energy storage device showing a transient response during constant current charge and discharge of the energy storage device characterized by a first time constant, and
- a second RC parallel circuit that simulates the second polarization characteristic of the energy storage device showing a transient response during constant current charge and discharge of the energy storage device characterized by a second time constant larger than the first time constant,
- respective values of a resistive device and a capacitive device included in the second RC parallel circuit are set on a basis of the SOC-operating voltage characteristic during constant current charge and discharge of the energy storage device in the high change-amount region, and
- values of respective resistive devices included in the first RC parallel circuit and the second RC parallel circuit are set on a basis of a charge voltage-polarization voltage characteristic.
6 more elements
Dependencies are inferred from the claim text.