Method and apparatus for adjusting value of current of battery

Patent metadata

Field	Value
Publication number	US-2024133959-A1
Application number	US-202318297754-A
Country	US
Kind code	A1
Filing date	Apr 9, 2023
Priority date	Oct 23, 2022
Publication date	Apr 25, 2024
Grant date	—

Abstract

A method for adjusting a current of a battery includes obtaining one or more parameters of a battery including the current of the battery, a voltage and a temperature of the battery, determining a first correction parameter relating to a variation in current due to charging and discharging of the battery, based on at least a portion of the one or more parameters, determining a difference between an electrolyte concentration of an anode surface and an electrolyte concentration of a cathode surface of the battery, based on at least a portion of the one or more parameters, determining a temperature parameter based on the temperature of the battery, determining a second correction parameter relating to a temperature of the battery, based on the difference and the temperature parameter, and determining a correction value for the current of the battery based on the first correction parameter and the second correction parameter.

First claim

What is claimed is:

1 . A method of adjusting a value of a current of a battery, performed by an electronic device, the method comprising:
obtaining values of one or more basic parameters of a battery comprising the current of the battery, a voltage of the battery, and a temperature of the battery; determining a value of a first correction parameter relating to a variation in current due to charging and discharging of the battery, based on at least a portion of the value of the one or more basic parameters; determining a difference between an electrolyte concentration of an anode surface and an electrolyte concentration of a cathode surface of the battery, based on at least a portion of the values of the one or more basic parameters; determining a value of a temperature parameter based on the temperature of the battery; determining a value of a second correction parameter relating to a temperature of the battery, based on a variation of the difference and the value of the temperature parameter; and determining a correction value of the current of the battery by adjusting an initial value of the current, based on the value of the first correction parameter and the value of the second correction parameter.

2 . The method of claim 1 , further comprising:
applying the correction value to a battery model for estimating an internal state of the battery.

3 . The method of claim 2 , wherein the battery model is an electro-chemical model or an electro-circuit model.

4 . The method of claim 1 , wherein the first correction parameter and the second correction parameter relate to current accumulated in a double layer capacitor formed at an interface between an electrode and an electrolyte of the battery.

5 . The method of claim 1 , wherein the current of the battery comprises any one of:
a charging current input to the battery in response to the battery being charged; or a discharge current supplied by the battery in response to the battery being discharged.

6 . The method of claim 1 , wherein the determining of the value of the first correction parameter comprises:
determining the value of the first correction parameter based on a capacitance per electrode area of the battery, a total electrode area of the battery, and a change rate of a voltage of the battery.

7 . The method of claim 1 , wherein the determining of the difference between the electrolyte concentration of the anode surface and the electrolyte concentration of the cathode surface of the battery comprises:
determining a change in a concentration distribution of the electrolyte of the battery, based on at least a portion of the values of the one or more basic parameters; and determining the difference between the electrolyte concentration of the anode surface and the electrolyte concentration of the cathode surface of the battery, based on the change in the concentration distribution of the electrolyte of the battery.

8 . The method of claim 1 , wherein a first value of the temperature parameter determined with respect to a first temperature of the battery is greater than or equal to a second value of the temperature parameter determined with respect to a second temperature that is higher than the first measured temperature.

9 . The method of claim 1 , further comprising:
determining whether a variation in the current is greater than or equal to a threshold variation; and applying the values of the one or more basic parameters to the battery model for estimating the internal state of the battery, in response to the variation not being greater than or equal to the threshold variation.

10 . The method of claim 9 , wherein the value of the first correction parameter and the value of the second correction parameter are determined, in response to the variation being greater than or equal to the threshold variation.

11 . The method of claim 1 , wherein the battery is included in a mobile terminal.

12 . The method of claim 1 , wherein the battery is included in a vehicle.

13 . The method of claim 1 , the difference between the electrolyte concentration of the anode surface and the electrolyte concentration of the cathode surface is determined by applying any one or any combination of the current of the battery, the voltage of the battery, the temperature of the battery a diffusion coefficient of the electrolyte, and a prior concentration distribution of the electrolyte to a battery model.

14 . An electronic device for adjusting a value of a current of a battery, the electronic device comprising:
a memory configured to store a program; and a processor configured to execute the program to configure the electronic device to obtain values of one or more basic parameters of a battery comprising the current of the battery, a voltage of the battery, and a temperature of the battery; determine a value of a first correction parameter relating to a variation in current due to charging and discharging of the battery, based on at least a portion of the values of the one or more basic parameters; determine a difference between an electrolyte concentration of an anode surface and an electrolyte concentration of a cathode surface of the battery, based on at least a portion of the values of the one or more basic parameters; determine a value of a temperature parameter based on the temperature of the battery; determine a value of a second correction parameter relating to a temperature of the battery, based on a variation of the difference and the value of the temperature parameter; and determine a correction value of the current by adjusting an initial value of the current, based on the value of the first correction parameter and the value of the second correction parameter.

15 . A processor-implemented method of adjusting a value of a current of a battery, the method comprising:
obtaining values of one or more basic parameters of a battery comprising the current of the battery and a temperature of the battery; determining a value of a voltage of the battery based on at least a portion of the one or more basic parameters; determining a value of a first correction parameter relating to a change in current due to charging and discharging of the battery, based on at least a portion of the values of the one or more basic parameters and the value of the voltage of the battery; determining a difference between an electrolyte concentration of an anode surface and an electrolyte concentration of a cathode surface of the battery, based on at least a portion of the values of the one or more basic parameters; determining a value of a temperature parameter based on the temperature of the battery; determining a value of a second correction parameter relating to a temperature of the battery, based on a variation of the difference and the value of the temperature parameter; and determining a correction value of the current by adjusting an initial value of the current, based on the value of the first correction parameter and the value of the second correction parameter.

16 . The method of claim 15 , further comprising:
applying the correction value to a battery model for estimating an internal state of the battery.

17 . The method of claim 15 , wherein the first correction parameter and the second correction parameter relate to current accumulated in a double layer capacitor formed at an interface between an electrode and an electrolyte of the battery.

18 . The method of claim 15 , wherein the current of the battery comprises any one of:
a charging current input to the bat

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lim Ju Wan
• Kim Jinho
• Song Tae Won

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M10/486

  for measuring temperature · CPC title

• G01R19/16571

  comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current (G01R19/16514, G01R19/16519, G01R19/16528, G01R19/16533, G01R19/1659 take precedence; measuring currents by using elements sensitive to the magnetic field generated G01R15/14; measuring earth resistance G01R27/18; testing for leakage or short circuits in electrical apparatus G01R31/52) · CPC title

• G01R19/12

  Measuring rate of change · CPC title

• G01R31/3842

  combining voltage and current measurements · CPC title