Method for diagnosing state of reuse of battery
AssigneeMintech Co., Ltd
InventorsHee Kyung Myung, Jun Hee Lee
Life of this patent
Estimating the term…
Abstract
Provided is a method for diagnosing a state of reusable (SOR) of a battery and, more specifically, to a method for diagnosing an SOR of a battery, the method being capable of diagnosing the overall state of a battery during battery reuse by separately diagnosing a state of health (SOH) and a state of power (SOP) of the battery. The method for diagnosing a state of reusable (SOR) of a battery according to the present invention includes: estimating a state of charge (SOC) according to a change in an open circuit voltage (OCV); estimating a state of health (SOH) by using the SOC; calculating a state of power (SOP) in consideration of an output of a current battery; and calculating the SOR by using the SOH and the SOP.
Claims2
A method for diagnosing a state of reusable of a battery, comprising:
- estimating a state of charge (SOC) according to a change in an open circuit voltage (OCV);
- estimating a state of health (SOH) by using the SOC;
- calculating a state of power (SOP) in consideration of an output of a current battery;
- and
- calculating a state of reusable (SOR) by using the SOH and the SOP,
- wherein the state of reusable (SOR) is represented by the following Equation 1,
- SOR=a×SOH+b×SOP <Equation 1>
- In the above Equation 1, 0≤a≤1, 0≤b≤1, and a+b=1 whereby the calculated SOR can be used to determine whether to reuse the battery so as to meet a user-planned life span.
A method for diagnosing a state of reusable of a battery, comprising:
- estimating a state of charge (SOC) according to a change in an open circuit voltage (OCV);
- estimating a state of health (SOH) by using the SOC;
- calculating a state of power (SOP) in consideration of an output of a current battery;
- and
- calculating a state of reusable (SOR) by using the SOH and the SOP,
- wherein the state of power (SOP) is represented by the following Equation 2,
- SOP
- =
- (
- V
- 0
- -
- I
- s
- ×
- (
- R
- s
- ′
- +
- R
- p
- ′
- )
- V
- 0
- -
- I
- s
- ×
- (
- R
- s
- d
- +
- R
- p
- d
- )
- )
- ×
- 100
- 〈
- Equation
-
-
- 2
- 〉
- wherein
- Rso represents the Rs value when the SOH is 100% and the SOC is 50% at 25° C.,
- Rp0 represents the Rp value when the SOH is 100% and the SOC is 50% at 25° C.
- Rs′ represents the Rs value when the current SOH value and the SOC are 50% at 25° C.,
- Rp′ represents the Rp value when the current SOH value and the SOC are 50% at a 25° C., and
- Is represents a standard C rate current value whereby the calculated SOR can be used to determine whether to reuse the battery so as to meet a user-planned life span.
Dependencies are inferred from the claim text.