Method and apparatus with battery cell charging based on degradation parameter of electrochemical model

Patent metadata

Field	Value
Publication number	US-2024030733-A1
Application number	US-202318106701-A
Country	US
Kind code	A1
Filing date	Feb 7, 2023
Priority date	Jul 22, 2022
Publication date	Jan 25, 2024
Grant date	—

Abstract

A processor-implemented method with battery cell charging includes: for each degradation parameter set comprising one or more degradation parameters related to degradation, communicating with a server configured to generate and store a look-up table (LUT) comprising charge data for each index combination of the one or more degradation parameters comprised in the degradation parameter set; determining a current value of the one or more of the degradation parameters corresponding to a target battery cell of an electronic device and transmitting the current value to the server; receiving an LUT corresponding to the current value of the one or more degradation parameters from the server; and charging the target battery cell based on a charging profile that is generated by charge data of the received LUT.

First claim

What is claimed is:

1 . A processor-implemented method with battery cell charging, the method comprising:
for each degradation parameter set comprising one or more degradation parameters related to degradation, communicating with a server configured to generate and store a look-up table (LUT) comprising charge data for each index combination of the one or more degradation parameters comprised in the degradation parameter set; determining a current value of the one or more of the degradation parameters corresponding to a target battery cell of an electronic device and transmitting the current value to the server; receiving an LUT corresponding to the current value of the one or more degradation parameters from the server; and charging the target battery cell based on a charging profile that is generated by charge data of the received LUT.

2 . The method of claim 1 , wherein the server is configured to, before receiving the current value of the one or more degradation parameters corresponding to the target battery cell from the electronic device, generate and store, in advance, an LUT for each combination of an index of the one or more degradation parameters corresponding to the target battery cell.

3 . The method of claim 1 , wherein the transmitting to the server comprises:
measuring battery information on a current, a voltage, and a temperature of the target battery cell; and determining whether to update a state of health (SOH) of the target battery cell based on the measured battery information.

4 . The method of claim 3 , wherein the determining of whether to update the SOH of the target battery cell comprises, in response to a voltage difference between a predicted voltage of the target battery cell based on the measured battery information and a measured voltage of the target battery cell being greater than or equal to a threshold voltage, determining to update the SOH of the target battery cell.

5 . The method of claim 4 , wherein the transmitting to the server further comprises, in response to determining to update the SOH of the target battery cell:
determining a current SOH of the target battery cell based on the measured battery information and the current value of the one or more degradation parameters determined based on the measured battery information; and determining whether to update an existing LUT based on the determined current SOH of the target battery cell.

6 . The method of claim 5 , wherein the determining of whether to update the existing LUT comprises:
loading an SOH of the target battery cell at a time point at which the existing LUT is received from the server; determining whether to update the existing LUT based on a difference between the loaded SOH of the target battery cell and the current SOH of the target battery cell; and in response to determining to update the existing LUT, transmitting the current value of the one or more degradation parameters to the server.

7 . The method of claim 1 , wherein the charging of the target battery cell comprises generating a charging profile based on an internal state condition for each charging step that is the charge data of the received LUT.

8 . The method of claim 1 , wherein the receiving from the server comprises receiving the LUT corresponding to the current value, wherein the LUT corresponding to the current value is output by inputting the current value of the one or more degradation parameters to a machine learning model that is trained by using another LUT and a combination of values of a degradation parameter comprised in the degradation parameter set.

9 . The method of claim 1 , wherein
the server is configured to, for each index combination of a degradation parameter comprised in a degradation parameter set, individually generate and store an LUT for each charging mode, the transmitting to the server comprises transmitting the current value of the one or more degradation parameters and a charging mode of the electronic device that is set based on a magnitude of charging power of the electronic device to the server, and the receiving from the server comprises receiving the charging mode of the electronic device and an LUT corresponding to the current value of the one or more degradation parameters from the server.

10 . The method of claim 1 , wherein the receiving from the server comprises, in response to an LUT corresponding to the current value of the one or more degradation parameters not being stored in the server, receiving, from the server, an LUT determined by combining some of LUTs generated for each index combination of the at least one parameter.

11 . A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, configure the processor to perform the method of claim 1 .

12 . An electronic device comprising:
for each degradation parameter set comprising one or more degradation parameters related to degradation, a communicator configured to communicate with a server configured to generate and store a look-up table (LUT) comprising charge data for each index combination of the one or more degradation parameters comprised in the degradation parameter set; and a processor configured to:
determine and transmit, to the server, a current value of the one or more of the degradation parameters corresponding to a target battery cell of the electronic device;
receive an LUT corresponding to the current value of the one or more degradation parameters; and
charge the target battery cell based on a charging profile that is generated by charge data of the received LUT.

13 . The electronic device of claim 12 , wherein the communicator is configured to, before receiving the current value of the one or more degradation parameters corresponding to the target battery cell from the electronic device, communicate with the server configured to generate and store, in advance, an LUT for each combination of an index of the one or more degradation parameters corresponding to the target battery cell.

14 . The electronic device of claim 12 , wherein, for the transmitting to the server, the processor is configured to:
measure battery information on a current, a voltage, and a temperature of the target battery cell; and determine whether to update a state of health (SOH) of the target battery cell based on the measured battery information.

15 . The electronic device of claim 14 , wherein, for the determining whether to update the SOH of the target battery cell, the processor is configured to, in response to a voltage difference between a predicted voltage of the target battery cell based on the measured battery information and a measured voltage of the target battery cell being greater than or equal to a threshold voltage, determine to update the SOH of the target battery cell.

16 . The electronic device of claim 15 , wherein, for the transmitting to the server, the processor is configured to, in response to determining to update the SOH of the target battery cell:
determine a current SOH of the target battery cell based on the measured battery information and the current value of the one or more degradation parameters determined based on the measured battery information; and determine whether to update an existing LUT based on the determined current SOH of the target battery cell.

17 . The electronic device of claim 16 , wherein, for the determining of whether to update the existing LUT, the processor is configured to:
load the SOH of the target battery cell at a time point of receiving the existing LUT from the

Assignees

• Samsung Electronics Co Ltd

Inventors

• Song Tae Won
• Kim Jinho
• Lim Ju Wan
• Oh Duk Jin
• Huang Terrance Christopher

Classifications

• H02J7/933 Primary

  the cycle being controlled or terminated in response to electric parameters · CPC title

• H02J7/40 Primary

  characterised by the exchange of charge or discharge related data · CPC title

• H02J7/84 Primary

  Control of state of health [SOH] · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H02J7/977

  of the battery · CPC title