Estimating condition of battery, related system and vehicle

Patent metadata

Field	Value
Publication number	US-11662392-B2
Application number	US-202217663791-A
Country	US
Kind code	B2
Filing date	May 17, 2022
Priority date	Jan 31, 2013
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

A method may comprise storing a first service provider record associated with a first project located at a first geographic location, receiving a request for project identifiers located within a section of a geographic area, providing a subset of the first set of the one or more project identifiers to be displayed on a second map the first user device, receiving a selected project of the project identifiers, providing a project page indicating categorical identifiers associated with the first project indicating at least some work performed, a link to at least one service professional's profile page, an opinion review and an insight review, receiving a selection of the link to the at least one service professional's profile page, and providing, a profile page of the at least one service professional, the profile page including contact information of the at least one service professional.

First claim

The invention claimed is:

1. A method comprising:
identifying a first attenuation curve of a battery based on recorded data of battery usage during a first period of time, a first usage mode of the battery, and a set of previously identified attenuation curves, the first attenuation curve being one of the set of previously identified attenuation curves, each of the set of previously identified attenuation curves being associated with a different usage mode of a set of usage modes, each attenuation curve representing a change of a charged capacity of the battery over battery usage, the first usage mode being one of the set of usage modes;
identifying a second attenuation curve of the battery based on recorded data of battery usage during the second period of time, a second usage mode of the battery, and the set of previously identified attenuation curves, the second attenuation curve being one of the set of previously identified attenuation curves, the second usage mode being one of the set of usage modes;
calculating a degradation of the battery during a combined period of time that includes the first period of time and the second period of time according to the recorded data, the first and second usage modes, and a slope of the first attenuation curve, and the second attenuation curve, the degradation representing a quantity of the charged capacity of the battery that was reduced over the battery usage during the combined period of time;
and displaying an adjusted cost amount associated with a user of the battery, the adjusted cost amount being determined based at least in part on the degradation of the battery, the adjusted cost amount representing a residual value of the battery.

2. The method of claim 1 , wherein the data of the battery usage comprises: a start time and end time of the battery usage, initial voltage and final voltage of the battery usage, charge current, charge level, temperature, discharge current, idle time, and depth of discharge representing quantity of electricity energy of the battery before idle.

3. The method of claim 2 , wherein when the first usage mode is a charging mode, the degradation of the battery is calculated according to charge level L, charging capacity δe, temperature T, initial charging voltage U a and final charging voltage U b as follows:
calculate the charging capacity δe during the combined period of time according to start time of charging t a , an end time of charging t b and charge current I c of the combined period of time;
search possible charging modes of the battery and possible attenuation curves corresponding to the possible charging modes for a set {M a } of all possible charging modes matching charge level L, initial charging voltage U a and temperature T, and a set {M b } of all possible charging modes matching charge level L, final charging voltage U b and temperature T;
search the set {M b } and the set {M a } respectively for a mode m b and a mode m a such that a difference between the charging capacity of the mode m b and the charging capacity of the mode m a is equal to δe;
according to attenuation curves f a and f b corresponding to the modes m a and m b , calculate slopes s a and s b of the attenuation curves f a and f b at a point c=c a respectively, wherein c a represents a charged capacity of the battery at a time t a , and s a and s b respectively represent degradation caused by charging the battery from a standard cut-off voltage to the initial charging voltage U a and the final charging voltage U b under a condition of the charge current I c and temperature T;
and calculate the battery degradation s=s b −s a during the combined period of time, and obtaining a charging capacity c b =c a +s of the battery at a time t b .

4. The method of claim 3 , wherein, estimating the condition of the battery further comprises:
calculating a rate of depreciation

D
r

=

C
a

-

C
b

C
0

-

C
e

 caused by using the battery once, where c 0 is a factory capacity of the battery and c e is a scrap capacity of the battery.

5. The method of claim 3 , wherein, estimating the condition of the battery further comprises:
calculating a remaining quantity of electricity energy of the battery according to the possible usage modes of battery and efficiencies corresponding to the possible usage modes, wherein the remaining quantity of electricity energy of the battery is obtained by accumulating changes of the remaining quantity of electricity energy caused by battery usage on a basis of a factory electricity energy e 0 of the battery.

6. The method of claim 5 , wherein, when the first usage mode is a charging mode, the remaining quantity of electricity energy is calculated as follows:
calculating the charging capacity δe during the combined period of time according to start time of charging t a , end time of charging t b and charge current I c of the combined period of time;
searching the possible usage modes of battery and efficiencies corresponding to the possible usage modes for the charging mode and a corresponding charging efficiency α according to the data on battery usage recorded during the combined period of time; and
calculating the remaining quantity of electricity energy e b =e a +α·c a /c 0 ·δe of the battery at the time t b , where c 0 is a factory capacity of the battery and e a is the remaining quantity of electricity energy of the battery at a time t a .

7. The method of claim 2 , wherein when the first usage mode is a discharging mode the degradation of the battery is calculated according to discharge current I d , temperature T, initial discharging voltage U a and final discharging voltage U b as follows:
searching possible discharging modes of the battery and possible attenuation curves corresponding to the discharging modes for a discharging mode m a matching discharge current I d , initial discharging voltage U a and temperature T, and a discharging mode m b matching discharge current I d , final discharging voltage U b and temperature T;
according to attenuation curves f a and f b corresponding to the modes m a and m b , calculating slopes s a and s b of the attenuation curves f a and f b at a point c=c a respectively, wherein c a represents a charged capacity of the battery at a time t a , and s a and s b respectively represent degradation caused by discharging the battery from the initial discharging voltage U a and the final discharging voltage U b to a standard cut-off voltage under a condition of the discharge current I d and temperature T; and
calculating battery degradation s=s b −s a during the combined-period of time, and obtaining a charged capacity c b =c a +s of the battery at a time t b .

8. The method of claim 2 , wherein, when the first usage mode is idle mode, the degradation of the battery is calculated according to depth of discharge d and temperature T as follows:
searching possible idle modes of the battery and possible attenuation curves corresponding to the idle modes for a discharging mode m matching the depth of discharge d and temperature T; and
according to an atte

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

• G01R31/392 Primary

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

• G01R31/367

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