Estimating condition of battery, related system and vehicle

Patent metadata

Field	Value
Publication number	US-12248029-B2
Application number	US-202318161847-A
Country	US
Kind code	B2
Filing date	Jan 30, 2023
Priority date	Jan 31, 2013
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

An apparatus for estimating a condition of a battery includes a mode identifying unit configured to identify a usage mode of the battery during a period of time and its corresponding attenuation curve, according to recorded data on battery usage, stored usage modes of the battery and attenuation curves corresponding to the various usage modes, the attenuation curve representing a change of a fully charged capacity of the battery with battery usage; and a condition estimating unit configured to calculate battery degradation according to the recorded data, the identified usage mode and its corresponding attenuation curve, the degradation representing a quantity of the fully charged capacity of the battery that is reduced over the battery usage. The condition of the battery is estimated so as to rationally judge the residual value of the battery in operation.

First claim

The invention claimed is:

1. A method comprising:
identifying a first usage mode of a battery based on first data of first usage of the battery during a first period of time, the first usage mode being one of a set of usage modes, each usage mode of the set of usage modes being one of a charging usage mode, a discharging usage mode, or an idle usage mode;
based on the first usage mode, identifying at least one first attenuation curve of the battery, the at least one first attenuation curve being one of a set of attenuation curves, each attenuation curve of the set of attenuation curves being associated with a usage mode of the set of usage modes;
determining at least one first slope of the at least one first attenuation curve;
identifying a second usage mode of the battery based on second data of second usage of the battery during a second period of time, the second usage mode being one of the set of usage modes;
based on the second usage mode, identifying at least one second attenuation curve of the battery, the at least one second attenuation curve being one of the set of attenuation curves;
determining at least one second slope of the at least one second attenuation curve;
calculating a first battery degradation for a combined period of time that includes the first period of time and the second period of time based on the at least one first slope and the at least one second slope, the first battery degradation representing a first quantity of a charged capacity of the battery that was reduced during the combined period of time;
estimating a first depreciation expense of the battery based on the first battery degradation; and
providing the first depreciation expense, for billing to a user of the battery.

2. The method of claim 1 wherein estimating the first depreciation expense of the battery based on the first battery degradation includes:
calculating a depreciation rate of the battery based on the first battery degradation; and
estimating the first depreciation expense of the battery based on the depreciation rate of the battery.

3. The method of claim 2 wherein calculating the depreciation rate of the battery based on the first battery degradation includes calculating the depreciation rate D r of the battery

D
r

=

c
a

-

c
b

c
o

-

c
e

,

according to where C a is a capacity of the battery at a time t a , C b is a capacity of the battery at a time t b , C o is a factory capacity of the battery, and C e is a scrap capacity of the battery.

4. The method of claim 3 wherein estimating the first depreciation expense of the battery based on the depreciation rate D r of the battery includes estimating the first depreciation expense B D of the battery according to B D =P×D r , where P is a price of the battery.

5. The method of claim 1 wherein the first usage mode of the battery is a charging usage mode, wherein based on the first usage mode, identifying the at least one first attenuation curve includes identifying two first attenuation curves, wherein determining at least one first slope of the at least one first attenuation curve includes determining two first slopes, and wherein calculating the first battery degradation for the combined period of time that includes the first period of time and the second period of time based on the at least one first slope and the at least one second slope includes calculating the first battery degradation for the combined period of time that includes the first period of time and the second period of time based on the two first slopes and the at least one second slope.

6. The method of claim 5 wherein the second usage mode of the battery is a discharging usage mode, wherein based on the second usage mode, identifying the at least one second attenuation curve includes identifying two second attenuation curves, wherein determining at least one second slope of the at least one second attenuation curve includes determining two second slopes, and wherein calculating the first battery degradation for the combined period of time that includes the first period of time and the second period of time based on the at least one first slope and the at least one second slope includes calculating the first battery degradation for the combined period of time that includes the first period of time and the second period of time based on the at least one first slope and the two second slopes.

7. The method of claim 1 , further comprising:
identifying a third usage mode of the battery based on third data of third usage of the battery during a third period of time, the third usage mode being one of the set of usage modes;
based on the third usage mode, identifying at least one third attenuation curve of the battery, the at least one third attenuation curve being one of the set of attenuation curves;
determining at least one third slope of the at least one third attenuation curve;
calculating a second battery degradation for the third period of time based on the at least one third slope, the second battery degradation representing a second quantity of a charged capacity of the battery that was reduced during the third period of time;
estimating a second depreciation expense of the battery based on the second battery degradation; and
providing the second depreciation expense for billing to a user of the battery.

8. The method of claim 7 wherein the third usage mode of the battery is an idle usage mode, wherein determining at least one third slope of the at least one third attenuation curve includes determining a single third slope of the at least one third attenuation curve, and wherein calculating the second battery degradation for the third period of time based on the at least one third slope includes calculating the second battery degradation as equal to the single third slope.

9. A system comprising at least one processor and memory containing instructions, the instructions being executable by the at least one processor to:
identify a first usage mode of a battery based on first data of first usage of the battery during a first period of time, the first usage mode being a one of a set of usage modes, each usage mode of the set of usage modes being one of a charging usage mode, a discharging usage mode, or an idle usage mode;
based on the first usage mode, identify at least one first attenuation curve of the battery, the at least one first attenuation curve being one of a set of attenuation curves, each attenuation curve of the set of attenuation curves being associated with a usage mode of the set of usage modes;
determine at least one first slope of the at least one first attenuation curve;
identify a second usage mode of the battery based on second data of second usage of the battery during a second period of time, the second usage mode being one of the set of usage modes;
based on the second usage mode, identify at least one second attenuation curve of the battery, the at least one second attenuation curve being one of the set of attenuation curves

Assignees

• Utopus Insights Inc

Inventors

• Dong Jin
• Gammons Carlton
• Shao Jin Yan
• Tian Qi Ming
• Xie Ming
• Yin Wen Jun
• Yu hong guang
• Zhao Li Li

Classifications

• G01R31/367

  Software therefor, e.g. for battery testing using modelling or look-up tables · CPC title

• G01R31/392 Primary

  Determining battery ageing or deterioration, e.g. state of health · CPC title