Method and apparatus to control temperature of battery

Patent metadata

Field	Value
Publication number	US-2018145379-A1
Application number	US-201715585889-A
Country	US
Kind code	A1
Filing date	May 3, 2017
Priority date	Nov 21, 2016
Publication date	May 24, 2018
Grant date	—

Abstract

Provided is a method and apparatus to control a temperature of a battery. The method and the apparatus are configured to acquire states of health (SOHs) of modules of a battery, acquire a reference temperature of a representative module among the modules based on the SOHs, and control a temperature of the battery based on the reference temperature.

First claim

What is claimed is:

1 . A method to control a temperature of a battery, the method comprising:
acquiring states of health (SOHs) of modules of a battery; acquiring a reference temperature of a representative module among the modules based on the SOHs; and controlling a temperature of the battery based on the reference temperature.

2 . The method of claim 1 , wherein the controlling of the temperature of the battery comprises:
comparing the reference temperature to an upper threshold temperature; and reducing the temperature of the battery based on a comparison result.

3 . The method of claim 1 , wherein the controlling of the temperature of the battery comprises:
comparing the reference temperature to a lower threshold temperature; and increasing the temperature of the battery based on a comparison result.

4 . The method of claim 1 , wherein the controlling of the temperature of the battery comprises controlling temperatures of the modules collectively to adjust the reference temperature to be within a temperature range.

5 . The method of claim 1 , wherein the controlling of the temperature of the battery comprises controlling either one or both of a temperature and a flow rate of a flow channel affecting temperatures of the modules to adjust the reference temperature to be within a temperature range.

6 . The method of claim 1 , wherein the acquiring of the SOHs comprises:
measuring currents and voltages of the modules; and estimating the SOHs based on the currents and the voltages.

7 . The method of claim 1 , wherein the acquiring of the reference temperatures comprises selecting the reference module corresponding to a minimum SOH from the SOHs.

8 . The method of claim 1 , wherein the acquiring of the reference temperature comprises estimating the reference temperature based on a current and a voltage of the reference module.

9 . The method of claim 1 , wherein the acquiring of the reference temperature comprises measuring a temperature of the reference module.

10 . The method of claim 1 , wherein the acquiring of the SOHs comprises estimating the SOHs based on SOHs of cells included in each of the modules.

11 . The method of claim 1 , wherein the acquiring of the reference temperature comprises estimating the reference temperature based on temperatures of cells included in the reference module.

12 . The method of claim 1 , further comprising:
comparing a standard deviation of the SOHs to a threshold; and determining whether the reference temperature is to be acquired based on a comparison result.

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

14 . An apparatus to control a temperature of a battery, the apparatus comprising:
a processor configured to
acquire states of health (SOHs) of modules of the battery,
acquire a reference temperature of a representative module among the modules based on the SOHs, and
control a temperature of the battery based on the reference temperature.

15 . The apparatus of claim 14 , wherein the processor is configured to compare the reference temperature to an upper threshold temperature and reduce the temperature of the battery based on a comparison result.

16 . The apparatus of claim 14 , wherein the processor is configured to compare the reference temperature to a lower threshold temperature and increase the temperature of the battery based on a comparison result.

17 . The apparatus of claim 14 , wherein the processor is configured to collectively control temperatures of the modules to adjust the reference temperature to be within a temperature range.

18 . The apparatus of claim 14 , wherein the processor is configured to control either one or both of a temperature and a flow rate of a flow channel affecting temperatures of the modules to adjust the reference temperature to be in within a temperature range.

19 . The apparatus of claim 14 , wherein the processor is configured to measure currents and voltages of the modules and estimate the SOHs based on the currents and the voltages.

20 . The apparatus of claim 14 , wherein the processor is configured to select the reference module corresponding to a minimum SOH from the SOHs.

21 . A battery temperature control method, comprising:
measuring currents and voltages of modules of a battery to estimate a state of health (SOH) of the modules; selecting a representative module amongst the modules as a module corresponding to a minimal SOH among SOHs of the modules included in the battery; and controlling a temperature of the battery based on the minimal SOH as a reference temperature to reduce battery degradation.

22 . The method of claim 21 , further comprising:
comparing a standard deviation of the SOHs of the modules to a threshold and, in response to the standard deviation being greater than the threshold, the processor acquires the reference temperature.

23 . The method of claim 21 , further comprising:
controlling at least one of a temperature or a flow rate of a flow channel affecting the temperatures of the modules and adjusts the reference temperature to be within a temperature range.

24 . The method of claim 21 , further comprising:
comparing the reference temperature to an upper limit temperature of a temperature range and, in response to the reference temperature being greater than the upper limit temperature, decreases temperatures of each module by a difference between the reference temperature and an upper limit temperature of the temperature range.

25 . The method of claim 21 , further comprising:
comparing the reference temperature to a lower limit temperature of a temperature range and, in response to the reference temperature being less than the lower limit temperature, increases the temperatures of each module by a difference between the reference temperature and a lower limit temperature of the temperature range.

26 . The method of claim 21 , wherein the modules are configured in series, in parallel, or in a matrix form in the battery.

Assignees

• Samsung Electronics Co Ltd

Inventors

• You Kaeweon
• Park Sangdo

Classifications

• H01M10/613 Primary

  Cooling or keeping cold · CPC title

• H02J7/84

  Control of state of health [SOH] · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H02J7/92

  with prioritisation of loads or sources · CPC title