APPARATUS AND METHOD FOR ESTIMATING VOLTAGE OF SECONDARY BATTERY INCLUDING BLENDED CATHODE MATERIAL
First Claim
1. An apparatus for estimating a voltage of a secondary battery which includes a cathode comprising a first cathode material and a second cathode material with different operating voltage ranges, an anode comprising an anode material and a separator for separating the cathode from the anode, the apparatus comprising:
- a control unit configured to estimate a voltage of a secondary battery during charging or discharging of the secondary battery based on a circuit model comprising a first cathode material circuit whose voltage changes according to SOC of the first cathode material and an impedance component of the first cathode material, a second cathode material circuit connected to the first cathode material circuit in parallel and whose voltage changes according to SOC of the second cathode material and an impedance component of the second cathode material, and an anode material circuit connected to the first and second cathode material circuits in series and whose voltage changes according to SOC of the anode material and an impedance component of the anode material.
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Accused Products
Abstract
Disclosed is an apparatus for estimating a voltage of a secondary battery which includes a cathode comprising a first cathode material and a second cathode material with different operating voltage ranges, an anode comprising an anode material and a separator for separating the cathode from the anode. The apparatus comprises a control unit configured to estimate a voltage of a secondary battery based on a circuit model including a first cathode material circuit, a second cathode material circuit and an anode material circuit, each circuit modeled to change its voltage according to State Of Charge (SOC) of the electrode material corresponding the circuit and a current flowing through the circuit.
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Citations
16 Claims
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1. An apparatus for estimating a voltage of a secondary battery which includes a cathode comprising a first cathode material and a second cathode material with different operating voltage ranges, an anode comprising an anode material and a separator for separating the cathode from the anode, the apparatus comprising:
a control unit configured to estimate a voltage of a secondary battery during charging or discharging of the secondary battery based on a circuit model comprising a first cathode material circuit whose voltage changes according to SOC of the first cathode material and an impedance component of the first cathode material, a second cathode material circuit connected to the first cathode material circuit in parallel and whose voltage changes according to SOC of the second cathode material and an impedance component of the second cathode material, and an anode material circuit connected to the first and second cathode material circuits in series and whose voltage changes according to SOC of the anode material and an impedance component of the anode material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16)
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15. An apparatus for estimating a voltage of a secondary battery which includes (i) a cathode comprising a first cathode material and a second cathode material, wherein the first and second cathode materials have different intercalation or deintercalation concentrations of operating ions according to the change of voltage, (ii) an anode comprising an anode material which operating ions are intercalated therein or deintercalated therefrom, and (iii) a separator for separating the cathode from the anode, the apparatus comprising:
a control unit configured to estimate a voltage of a secondary battery during charging or discharging based on a circuit model comprising a first cathode material circuit whose voltage changes according to the amount of operating ions intercalated into or deintercalated from the first cathode material, a second cathode material circuit which is connected to the first cathode material circuit in parallel and whose voltage changes according to the amount of operating ions intercalated into or deintercalated from the second cathode material, and an anode material circuit which is connected to the first and second cathode material circuits in series and whose voltage changes according to the amount of operating ions intercalated into or deintercalated from the anode material.
Specification