Back to results
US 10,379,169 B2Granted
Battery capacity estimating apparatus and battery capacity estimating method thereof
AssigneesTatung Co., Ltd., Tatung University
InventorsChang-Hua Lin, Min-Hsuan Hung
Life of this patent
Estimating the term…
Abstract
A battery capacity estimating apparatus and a battery capacity estimating method of the battery capacity detecting apparatus are provided. A state of charge and a state of health of a battery are calculated according to dynamic impedance of the battery.
Claims8
A battery capacity estimating apparatus for real-time determining battery performance, comprising:
- a detection unit detecting a voltage variation and a current variation of a battery as a detection result;
- and
- an estimating unit coupled to the detection unit, wherein the estimating unit calculates dynamic impedance of the battery and a variation in a capacity of the battery according to the detection result provided by the detection unit, and the estimating unit determines a state of charge and a state of health of the battery according to the dynamic impedance of the battery and the variation in the capacity of the battery,
- wherein the state of charge of the battery is
- SOC
- =
- [
- Δ
-
- (
- Δ
-
-
- V
- /
- Δ
-
-
- I
- )
- Δ
-
-
- SOC
- -
- b
- ]
- /
- 2
-
- a
- a characteristic curve equation of the battery on a brand new condition is
- Δ
-
- (
- Δ
-
-
- V
- /
- Δ
-
-
- I
- )
- Δ
-
-
- SOC
- =
- 2
-
- a
- ′
-
- (
- SOC
- )
- +
- b
- ′
- ,
- ΔV is the voltage variation of the battery, ΔI is the current variation of the battery, ΔV/ΔI is the dynamic impedance of the battery, ΔSOC is the variation in the capacity of the battery, coefficients a′ and b′ are known real numbers, and coefficients a and b are calculated by an equation:
- a
- =
- 1
- 2
- ×
- Δ
-
- [
- Δ
-
- (
- Δ
-
-
- V
- /
- Δ
-
-
- I
- )
- ]
- Δ
-
- [
- Δ
-
-
- SOC
- ]
- b
- =
- b
- ′
-
- (
- a
- -
- a
- ′
- )
- 2
-
- a
- .
- wherein the state of charge and the state of health of the battery are battery performance parameters for battery recycling management.
106 more elements
A battery capacity estimating method for real-time determining battery performance, comprising:
- detecting a voltage variation and a current variation of a battery as a detection result;
- calculating dynamic impedance of the battery and a variation in a capacity of the battery according to the detection result;
- and
- determining a state of charge and a state of health of a battery according to the dynamic impedance of the battery and the variation in the capacity of the battery, wherein the state of charge of the battery is
- SOC
- =
- [
- Δ
-
-
- (
- Δ
-
-
- V
- /
- Δ
-
-
- I
- )
- Δ
-
-
- SOC
- -
- b
- ]
- /
- 2
-
- a
- ,
- a characteristic curve equation of the battery on a brand new condition is
- Δ
-
-
- (
- Δ
-
-
- V
- /
- Δ
-
-
- I
- )
- Δ
-
-
- SOC
- =
- 2
-
- a
- ′
-
- (
- SOC
- )
- +
- b
- ′
- ,
- ΔV is the voltage variation of the battery, ΔI is the current variation of the battery, ΔV/ΔI is the dynamic impedance of the battery, ΔSOC is the variation in the capacity of the battery, coefficients a′ and b′ are known real numbers, and coefficients a and b are calculated by an equation:
- a
- =
- 1
- 2
- ×
- Δ
-
- [
- Δ
-
- (
- Δ
-
-
- V
- /
- Δ
-
-
- I
- )
- ]
- Δ
-
- [
- Δ
-
-
- SOC
- ]
- ,
- b
- =
- b
- ′
-
- (
- a
- -
- a
- ′
- )
- 2
-
- a
- ,
- wherein the state of charge and the state of health of the battery are battery performance parameters for battery recycling management.
110 more elements
Dependencies are inferred from the claim text.