Method and apparatus for controlling battery

Patent metadata

Field	Value
Publication number	US-2018145528-A1
Application number	US-201715712349-A
Country	US
Kind code	A1
Filing date	Sep 22, 2017
Priority date	Nov 22, 2016
Publication date	May 24, 2018
Grant date	—

Abstract

A method and apparatus for controlling a battery, the apparatus configured to measure a current usage of a battery, generate a concentration limitation condition on a material in an active material of the battery based on a characteristic of the active battery, and control a usage of the battery based on the current usage and the concentration limitation condition.

First claim

What is claimed is:

1 . A method of controlling a battery, comprising:
measuring a current usage environment of a battery; generating a concentration limitation condition of a material in an active material of the battery based on a characteristic of the active material; and controlling a usage environment of the battery based on the current usage environment and the concentration limitation condition.

2 . The method of claim 1 , wherein the controlling of the usage environment of the battery comprises:
calculating a current concentration distribution of the material in the active material based on the current usage environment and the characteristic of the active material; and controlling a current of the battery based on whether the current concentration distribution satisfies the concentration limitation condition.

3 . The method of claim 1 , further comprising:
generating a potential limitation condition for an electrode of the battery based on the current usage environment and the concentration limitation condition; and controlling the usage environment of the battery based on the current usage environment and the potential limitation condition.

4 . The method of claim 3 , wherein the controlling of the usage environment of the battery comprises:
calculating a current potential distribution of the electrode based on the current usage environment and the characteristic of the active material; and controlling a current of the battery based on whether the current potential distribution satisfies the potential limitation condition.

5 . The method of claim 1 , further comprising:
determining a side reaction potential that triggers a side reaction between the material and an electrolyte in which the material moves based on any one or any combination of any two or more of the characteristic of the active material, a characteristic of the material, and a characteristic of the electrolyte; and controlling the usage environment of the battery based on the current usage environment and the side reaction potential.

6 . The method of claim 5 , wherein the controlling of the usage environment of the battery comprises:
calculating a current potential distribution of an electrode of the battery based on the current usage environment and the characteristic of the active material; and controlling a current of the battery by comparing the current potential distribution to the side reaction potential.

7 . The method of claim 1 , wherein the active material comprises a positive active material and a negative active material, and
the generation of the concentration limitation condition comprises determining an upper limit concentration and a lower limit concentration of a material in the positive active material and an upper limit concentration and a lower limit concentration of a material in the negative active material.

8 . The method of claim 7 , further comprising:
generating a potential limitation condition on an electrode of the battery based on the current usage environment and the concentration limitation condition; and controlling the usage environment of the battery based on the current usage environment and the potential limitation condition, wherein the generating of the potential limitation condition comprises: calculating an upper limit concentration and a lower limit concentration of a positive electrode based on the upper limit concentration and the lower limit concentration of the material in the positive active material; and calculating an upper limit concentration and a lower limit concentration of a negative electrode based on the upper limit concentration and the lower limit concentration of the material in the negative active material.

9 . The method of claim 1 , wherein the current usage environment comprises a temperature, a voltage, and a current of the battery.

10 . The method of claim 1 , wherein the generating of the concentration limitation condition comprises generating the concentration limitation condition based on a degree of degradation in the battery.

11 . The method of claim 1 , wherein the controlling of the usage environment of the battery comprises:
estimating a battery state comprising a state of charge (SOC) of the battery; and determining a maximum available power for charging or discharging during a standard time based on the battery state and the concentration limitation condition.

12 . The method of claim 11 , wherein the determining of the maximum available power comprises:
setting the maximum available power based on the battery state; and adjusting the set maximum available power based on the concentration limitation condition.

13 . The method of claim 12 , wherein the adjusting of the set maximum available power based on the concentration limitation condition comprises:
calculating a predicted concentration distribution of the material in the active material under a condition that charging or discharging of the set maximum available power is performed during the standard time; and adjusting the set maximum available power based on whether the predicted concentration distribution satisfies the concentration limitation condition.

14 . The method of claim 12 , wherein the determining of the available power further comprises:
generating a potential limitation condition on an electrode of the battery based on the current usage environment and the concentration limitation condition; and adjusting the set maximum available power based on the potential limitation condition.

15 . The method of claim 14 , wherein the adjusting of the set maximum available power based on the potential limitation condition comprises:
calculating a predicted potential distribution of the electrode under a condition that charging or discharging of the set maximum available power is performed during the standard time; and adjusting the set maximum available power based on whether the predicted potential distribution satisfies the potential limitation condition.

16 . The method of claim 12 , wherein the determining of the maximum available power further comprises:
determining a side reaction potential that triggers a side reaction between the material and an electrolyte in which the material moves based on any one or any combination of any two or more of the characteristic of the active material, a characteristic of the material, and a characteristic of the electrolyte; and adjusting the set maximum available power based on the side reaction potential.

17 . The method of claim 16 , wherein the adjusting of the set maximum available power based on the side reaction potential comprises:
calculating a predicted potential distribution of an electrode of the battery under a condition that charging or discharging of the set maximum available power is performed during the standard time; and adjusting the set maximum available power by comparing the predicted potential distribution to the side reaction potential.

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

19 . A battery control apparatus, comprising:
a processor configured to:
measure a current usage environment of a battery;
generate a concentration limitation condition on a material in an active material of the battery based on a characteristic of the active battery; and
control a usage environment of the battery based on the current usage environment and the concentration lim

Assignees

• Samsung Electronics Co Ltd

Inventors

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

Classifications

• H02J7/585

  Sequential battery discharge in systems with a plurality of batteries · CPC title

• H02J7/96

  in response to battery voltage · CPC title

• H02J7/94

  in response to battery current · CPC title

• H02J7/977 Primary

  of the battery · CPC title

• H02J7/04

  Regulation of charging current or voltage · CPC title