Battery service life management method and system

Patent metadata

Field	Value
Publication number	US-11340300-B2
Application number	US-202016839235-A
Country	US
Kind code	B2
Filing date	Apr 3, 2020
Priority date	Apr 5, 2019
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

A method and system that enhances a service life of a battery is provided. The method includes values of a set of operational characteristics of a plurality of electrochemically active materials of at least one electrode of the battery. The set of operational characteristics include a voltage, a change in accumulated energy, a change in ohmic resistance, and a change in a rate of change in accumulated energy with respect to a rate of change in ohmic resistance. The values are compared with predefined values of the set of operational characteristics. A rate of depletion and a type of depletion of each of the plurality of electrochemically active materials are determined, and a range of the State of Charge, a range of the voltage, and a range of current to operate the battery for enhanced service life are determined.

First claim

What is claimed is:

1. A method comprising:
detecting, by a User Equipment (UE), values of a set of operational characteristics of a plurality of electrochemically active materials of at least one electrode of a battery;
comparing, by the UE, the detected values with predefined values of the set of operational characteristics of each of the plurality of electrochemically active materials;
determining, by the UE, a rate of depletion of each of the plurality of electrochemically active materials, and a type of depletion of each of the plurality of electrochemically active materials during an operation of the battery, based on the comparing, wherein the rate of depletion is determined based on at least one of a State-of-Charge (SOC) of the battery, and a voltage of the battery; and
determining, by the UE, at least one of a range of the SOC, a range of the voltage, and a range of current to operate the battery, based on the determined rate of depletion and the determined type of depletion of each of the plurality of electrochemically active materials,
wherein the determining of the type of depletion further includes:
determining the type of depletion of each of the plurality of electrochemically active materials to be a first depletion type, when a value of a change in ohmic resistance increases with respect to a first predefined value; and
determining the type of depletion of each of the plurality of electrochemically active materials to be a second different depletion type, when the value of the change in ohmic resistance increases with respect to a second predefined value.

2. The method of claim 1 , wherein the set of operational characteristics comprises at least one of a voltage, a change in accumulated energy, a change in ohmic resistance, and a change in a rate of change in accumulated energy with respect to a rate of change in ohmic resistance.

3. The method of claim 1 , further comprising:
generating a notification to operate the battery within the determined range of the SOC, the determined range of the current, or the determined range of the voltage based on at least one of the determined range of the SOC, the determined range of the current, and the determined range of the voltage,
wherein the notification is at least one of a visual notification and an audio notification.

4. The method of claim 1 , further comprising:
generating a performance report;
receiving, in response to the generated performance report, an instruction to select at least one of the range of the SOC and the range of the voltage; and
operating the battery in one of the selected range of the SOC and the selected range of the voltage, based on the received instruction,
wherein the performance report comprises at least one of:
(a) the rate of depletion of each of the plurality of electrochemically active materials of the at least one electrode;
(b) the type of depletion of each of the plurality of electrochemically active materials of the at least one electrode; and
(c) at least one of the range of the SOC, the range of the current, and the range of the charging voltage of the battery.

5. The method of claim 1 , wherein the type of depletion comprises at least one of an Ohmic Resistance Increase (ORI) depletion, a Loss of Active Material (LAM) depletion, and a Loss of Lithium Inventory (LLI) depletion.

6. The method of claim 5 , further comprising:
determining the type of depletion of each of the plurality of electrochemically active materials to be the ORI depletion as the first depletion type, when the value of the change in ohmic resistance increases with respect to the first predefined value; and
determining the type of depletion of each of the plurality of electrochemically active materials to be the LLI depletion as the second depletion type, when the value of the change in ohmic resistance increases with respect to the second predefined value.

7. The method of claim 5 , further comprising:
determining the type of depletion of each of the plurality of electrochemically active materials to be one of the LAM and the LLI, when at least one peak corresponding to each of the plurality of electrochemically active materials in a first graph shifts downwardly with respect to at least one predefined peak corresponding to each of the plurality of electrochemically active materials in a second graph,
wherein the first graph depicts the detected values of the set of operational characteristics, and the second graph depicts the predefined values of the set of operational characteristics.

8. The method of claim 1 , wherein the plurality of electrochemically active materials include a Lithium Manganese Oxide (LMO), Lithium Nickel Cobalt Aluminum Oxide (NCA), and Lithium Nickel Manganese Cobalt Oxide (NCM).

9. A system comprising:
a controller communicatively coupled with a battery,
wherein the controller is configured to:
detect values of a set of operational characteristics of a plurality of electrochemically active materials of at least one electrode of the battery;
compare the detected values with predefined values of the set of operational characteristics of each of the plurality of electrochemically active materials;
determine a rate of depletion of each of the plurality of electrochemically active materials, and a type of depletion of each of the plurality of electrochemically active materials during an operation of the battery, based on the comparing, wherein the rate of depletion is determined based on at least one of a State-of-Charge (SOC) of the battery, and a voltage of the battery; and
determine at least one of a range of the SOC, a range of the voltage, and a range of current to operate the battery, based on the determined rate of depletion and the determined type of depletion of each of the plurality of electrochemically active materials,
wherein the determining of the type of depletion further includes:
determining the type of depletion of each of the plurality of electrochemically active materials to be a first depletion type, when a value of a change in ohmic resistance increases with respect to a first predefined value; and
determining the type of depletion of each of the plurality of electrochemically active materials to be a second different depletion type, when the value of the change in ohmic resistance increases with respect to a second predefined value.

10. The system of claim 9 , wherein the set of operational characteristics comprises at least one of a voltage, a change in accumulated energy, a change in ohmic resistance, and a change in a rate of change in accumulated energy with respect to a rate of change in ohmic resistance.

11. The system of claim 9 , wherein the controller is further configured to:
generate a notification to operate the battery within the determined range of the SOC, the determined range of the current, or the determined range of the voltage based on at least one of the determined range of SOC, the determined range of the current, and the determined range of the voltage,
wherein the notification is at least one of a visual notification and an audio notification.

12. The system of claim 9 , wherein the controller is further configured to:
generate a performance report,
receive, in response to the generated performance report, an instruction to select at least one of the range of the SOC and the range of the voltage; and
operate the battery in one of the selected range of the SOC and the selected range of the voltage, based on the received instruction,
wherein the performance report comprises at least one of:
(a) the rate of depletion of each of the plurality of electrochemically active materials of the at least one el

Assignees

• Samsung Electronics Co Ltd

Inventors

• Verma Mohan Kumar Singh
• Adiga Shashishekara Parampalli
• Song Tae Won

Classifications

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H01M2010/4271

  Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• G01R31/3646

  for indicating electrical conditions or variables, e.g. visual or audible indicators · CPC title