EP-4741847-A1 - TEST DEVICE AND METHOD FOR POWER PREDICTION OF BATTERY MANAGEMENT SYSTEM

Abstract

The present disclosure relates to a test device and a test method for power prediction of a battery management system, and a power prediction test device testing power prediction of a battery management system according to an embodiment of the present disclosure may include: a database including a plurality of power map tables indicating power according to a state of charge (SOC) and a temperature; a test executor generating a plurality of power prediction conditions with a combination of a plurality of SOCs and a plurality of temperatures in a power map table for a battery device, to which the battery management system is applied, among the plurality of power map tables, providing the battery management system with each of the plurality of power prediction conditions and a power prediction instruction corresponding to the each power prediction condition, and receiving a plurality of power prediction values according to the plurality of power prediction conditions from the battery management system; and a test comparator comparing each of the plurality of power prediction values with a normal range defined by a plurality of reference power values in the power map table based on a power prediction condition corresponding to the respective power prediction values.

Inventors

• EOM, JI HYE

Assignees

• LG Energy Solution, Ltd.

Dates

Publication Date

20260513

Application Date

20241205

Claims (18)

1. A power prediction test device testing power prediction of a battery management system, comprising: a database including a plurality of power map tables indicating power according to a state of charge (SOC) and a temperature; a test executor configured to generate a plurality of power prediction conditions with a combination of a plurality of SOCs and a plurality of temperatures in a power map table for a battery device, to which the battery management system is applied, among the plurality of power map tables, provide the battery management system with each of the plurality of power prediction conditions and a power prediction instruction corresponding to the each power prediction condition, and receive a plurality of power prediction values according to the plurality of power prediction conditions from the battery management system; and a test comparator configured to compare each of the plurality of power prediction values with a normal range defined by a plurality of reference power values in the power map table based on a power prediction condition corresponding to the respective power prediction values.
2. The power prediction test device of claim 1, wherein: the test comparator is configured to determine a first power value corresponding to a second SOC increased by a unit SOC from a first SOC corresponding to the power prediction condition and a first temperature corresponding to the power prediction condition, a second power value corresponding to a third SOC decreased by the unit SOC from the first SOC and the first temperature, a third power value corresponding to the first SOC and a second temperature increased by a unit temperature from the first temperature, and a fourth power value corresponding to the first SOC and a third temperature decreased by the unit temperature from the first temperature in the power map table, and determine the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among of the first to fourth power values and a lower limit value obtained by subtracting a predetermined margin from a minimum value among the first to fourth power values.
3. The power prediction test device of claim 1, wherein: the power map table includes a long-term discharge power map table, a short-term discharge power map table, a long-term charge power map table, and a short-term charge power map table, the long-term discharge power is power generated when the battery device is discharged from a current SOC to a predetermined first reference SOC during a predetermined first period of time, the short-term discharge power is power generated when the battery device is discharged from the current SOC to the first reference SOC during a second period shorter than the first period, the long-term charge power is power required for the battery device to be discharged from a current SOC to a predetermined second reference SOC during a predetermined third period of time, and the short-term charge power is power required for the battery device to be charged from the current SOC to the second reference SOC during a fourth period shorter than the third period.
4. The power prediction test device of claim 3, wherein: the test executor is configured to transmit a plurality of long-term discharge power prediction conditions and long-term discharge prediction instructions in the long-term discharge power map table to the battery management system, and receive a plurality of long term discharge power prediction values based on the plurality of long-term discharge power prediction conditions from the battery management system, and the test comparator is configured to, for each of the plurality of long-term discharge power prediction values in the long-term discharge power map table, determine a first long-term discharge power value corresponding to a second SOC increased by a unit SOC from a first SOC corresponding to a long-term discharge power prediction condition for the each long-term discharge power prediction value and a first temperature corresponding to the long-term discharge power prediction condition, a second long-term discharge power value corresponding to a third SOC decreased by the unit SOC from the first SOC, and the first temperature, a third long-term discharge power value corresponding to the first SOC, and a second temperature increased by a unit temperature from the first temperature, and a fourth long-term discharge power value corresponding to the first SOC, and a third temperature decreased by the unit temperature from the first temperature, determines the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among the first to fourth long-term discharge power values and a lower limit value obtained by subtracting a predetermined margin from a minimum value among the first to fourth long-term discharge power values, and determine a pass when the each long-term discharge power prediction value is within the normal range and determines a fail when the each long-term discharge power prediction value is out of the normal range.
5. The power prediction test device of claim 3, wherein: the test executor is configured to transmit a plurality of short-term discharge power prediction conditions and short-term discharge prediction instructions in the short-term discharge power map table to the battery management system, and receive a plurality of short term discharge power prediction values based on the plurality of short-term discharge power prediction conditions from the battery management system, and the test comparator is configured to, for each of the plurality of short-term discharge power prediction values in the short-term discharge power map table, determine a first short-term discharge power value corresponding to a second SOC increased by a unit SOC from a first SOC corresponding to a short-term discharge power prediction condition for the each short-term discharge power prediction value and a first temperature corresponding to the short-term discharge power prediction condition, a second short-term discharge power value corresponding to a third SOC decreased by the unit SOC from the first SOC, and the first temperature, a third short-term discharge power value corresponding to the first SOC, and a second temperature increased by a unit temperature from the first temperature, and a fourth short-term discharge power value corresponding to the first SOC, and a third temperature decreased by the unit temperature from the first temperature, determine the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among the first to fourth short-term discharge power values and a lower limit value obtained by subtracting a predetermined margin from a minimum value among the first to fourth short-term discharge power values, and determine a pass when the each short-term discharge power prediction value is within the normal range and determines a fail when the each short-term discharge power prediction value is out of the normal range.
6. The power prediction test device of claim 3, wherein: the test executor is configured to transmit a plurality of long-term charge power prediction conditions and long-term charge prediction instructions in the long-term charge power map table to the battery management system, and receive a plurality of long-term charge power prediction values based on the plurality of long-term charge power prediction conditions from the battery management system, and the test comparator is configured to, for each of the plurality of long-term charge power prediction values in the long-term charge power map table, determines a first long-term charge power value corresponding to a second SOC increased by a unit SOC from a first SOC corresponding to a long-term charge power prediction condition for the each long-term charge power prediction value and a first temperature corresponding to the long-term charge power prediction condition, a second long-term charge power value corresponding to a third SOC decreased by the unit SOC from the first SOC, and the first temperature, a third long-term charge power value corresponding to the first SOC, and a second temperature increased by a unit temperature from the first temperature, and a fourth long-term charge power value corresponding to the first SOC, and a third temperature decreased by the unit temperature from the first temperature, determine the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among the first to fourth long-term charge power values and a lower limit value obtained by subtracting a predetermined margin from a minimum value among the first to fourth long-term charge power values, and determine a pass when the each long-term charge power prediction value is within the normal range and determines a fail when the each long-term charge power prediction value is out of the normal range.
7. The power prediction test device of claim 3, wherein: the test executor is configured to transmit a plurality of short-term charge power prediction conditions and short-term charge prediction instructions in the short-term charge power map table to the battery management system, and receive a plurality of short-term charge power prediction values based on the plurality of short-term charge power prediction conditions from the battery management system, and the test comparator is configured to, for each of the plurality of short-term charge power prediction values in the short-term charge power map table, determine a first short-term charge power value corresponding to a second SOC increased by a unit SOC from a first SOC corresponding to a short-term charge power prediction condition for the each short-term charge power prediction value and a first temperature corresponding to the short-term charge power prediction condition, a second short-term charge power value corresponding to a third SOC decreased by the unit SOC from the first SOC, and the first temperature, a third short-term charge power value corresponding to the first SOC, and a second temperature increased by a unit temperature from the first temperature, and a fourth short-term charge power value corresponding to the first SOC, and a third temperature decreased by the unit temperature from the first temperature, determine the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among and a lower limit value obtained by subtracting a predetermined margin from a minimum value among the first to fourth long-term charge power values, and determine a pass when the each short-term charge power prediction value is within the normal range and determines a fail when the each short-term charge power prediction value is out of the normal range.
8. The power prediction test device of claim 3, wherein: the test comparator is configured to generate a plurality of discharge power difference values between the long-term discharge power map table and the short-term discharge power map table, compare a predicted discharge power difference, which is a difference between a long-term discharge power prediction value and a short-term discharge power prediction value under a condition of a first SOC and a first temperature provided by the battery management system, with a normal range to determine a pass and a fail, and determine the normal range with a plurality of reference discharge power difference values based on the condition of the first SOC and the first temperature among the plurality of discharge power difference values.
9. The power prediction test device of claim 8, wherein: the test comparator is configured to, determine a first discharge power difference value corresponding to a second SOC increased by a unit SOC from the first SOC and the first temperature, a second discharge power difference value corresponding to a third SOC decreased by the unit SOC from the first SOC, and the first temperature, a third discharge power difference value corresponding to the first SOC, and a second temperature increased by a unit temperature from the first temperature, and a fourth discharge power difference value corresponding to the first SOC, and a third temperature decreased by the unit temperature from the first temperature, and determine the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among the first to fourth discharge power difference values and a lower limit value obtained by subtracting the predetermined margin from a minimum value among the first to fourth discharge power difference values.
10. The power prediction test device of claim 3, wherein: the test comparator is configured to generate a plurality of charge power difference values between the long-term charge power map table and the short-term charge power map table, compare a predicted charge power difference, which is a difference between a long-term charge power prediction value and a short-term charge power prediction value under a condition of a first SOC and a first temperature provided by the battery management system, with a normal range to determine a pass and a fail, and determine the normal range with a plurality of reference charge power difference values based on a condition of the first SOC and the first temperature among the plurality of charge power difference values.
11. The power prediction test device of claim 10, wherein: the test comparator is configured to, determine a first charge power difference value corresponding to a second SOC increased by a unit SOC from the first SOC and the first temperature, a second charge power difference value corresponding to a third SOC decreased by the unit SOC from the first SOC, and the first temperature, a third charge power difference value corresponding to the first SOC, and a second temperature increased by a unit temperature from the first temperature, and a fourth charge power difference value corresponding to the first SOC, and a third temperature decreased by the unit temperature from the first temperature, and determine the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among the first to fourth charge power difference values and a lower limit value obtained by subtracting the predetermined margin from a minimum value among the first to fourth charge power difference values.
12. A power prediction test method testing power prediction of a battery management system, comprising: generating a plurality of power prediction conditions with a combination of a plurality of SOCs and a plurality of temperatures in a power map table; providing the battery management system with each of the plurality of power prediction conditions and a power prediction instruction corresponding to the each power prediction condition; receiving a plurality of power prediction values according to the plurality of power prediction conditions from the battery management system; and comparing each of the plurality of power prediction values with a normal range defined by a plurality of reference power values in the power map table based on a power prediction condition corresponding to the respective power prediction values.
13. The power prediction test method of claim 12, further comprising: determining a first power value corresponding to a second SOC increased by a unit SOC from a first SOC corresponding to the power prediction condition and the first temperature corresponding to the power prediction condition, a second power value corresponding to a third SOC decreased by the unit SOC from the first SOC and the first temperature, a third power value corresponding to the first SOC and a second temperature increased by a unit temperature from the first temperature, and a fourth power value corresponding to the first SOC and a third temperature decreased by the unit temperature from the first temperature in the power map table; and determining the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among the first to fourth power values and a lower limit value obtained by subtracting a predetermined margin from a minimum value among the first to fourth power values.
14. The power prediction test method of claim 12, wherein: the power map table includes a long-term discharge power map table, a short-term discharge power map table, a long-term charge power map table, and a short-term charge power map table, the long-term discharge power is power generated when the battery device is discharged from a current SOC to a predetermined first reference SOC during a predetermined first period of time, the short-term discharge power is power generated when the battery device is discharged from the current SOC to the first reference SOC during a second period shorter than the first period, the long-term charge power is power required for the battery device to be charged from a current SOC to a predetermined second reference SOC during a predetermined third period of time, and the short-term charge power is power required for the battery device to be charged from the current SOC to the second reference SOC during a fourth period shorter than the third period.
15. The power prediction test method of claim 14, further comprising: generating a plurality of discharge power difference values between the long-term discharge power map table and the short-term discharge power map table; generating a predicted discharge power difference, which is a difference between a long-term discharge power prediction value and a short-term discharge power prediction value under a condition of a first SOC and a first temperature provided by the battery management system; determining a normal range with a plurality of reference discharge power difference values based on a condition of the first SOC and the first temperature among the plurality of discharge power difference values; and comparing the predicted discharge power difference with the normal range to determine a pass and a fail.
16. The power prediction test method of claim 15, wherein: the determining of the normal range includes, determining a first discharge power difference value corresponding to a second SOC increased by a unit SOC from the first SOC and the first temperature, a second discharge power difference value corresponding to a third SOC decreased by the unit SOC from the first SOC, and the first temperature, a third discharge power difference value corresponding to the first SOC, and a second temperature increased by a unit temperature from the first temperature, and a fourth discharge power difference value corresponding to the first SOC, and a third temperature decreased by the unit temperature from the first temperature; and determining the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among the first to fourth discharge power difference values and a lower limit value obtained by subtracting the predetermined margin from a minimum value among the first to fourth discharge power difference values.
17. The power prediction test method of claim 14, further comprising: generating a plurality of charge power difference values between the long-term charge power map table and the short-term charge power map table; generating a predicted charge power difference, which is a difference between a long-term charge power prediction value and a short-term charge power prediction value under a condition of a first SOC and a first temperature provided by the battery management system; determining a normal range with a plurality of reference charge power difference values based on a condition of the first SOC and the first temperature among the plurality of charge power difference values; and comparing the predicted charge power difference with the normal range to determine a pass and a fail.
18. The power prediction test method of claim 17, wherein: the determining of the normal range includes, determining a first charge power difference value corresponding to a second SOC increased by a unit SOC from the first SOC and the first temperature, a second charge power difference value corresponding to a third SOC decreased by the unit SOC from the first SOC, and the first temperature, a third charge power difference value corresponding to the first SOC, and a second temperature increased by a unit temperature from the first temperature, and a fourth charge power difference value corresponding to the first SOC, and a third temperature decreased by the unit temperature from the first temperature; and determining the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among the first to fourth charge power difference values and a lower limit value obtained by subtracting the predetermined margin from a minimum value among the first to fourth charge power difference values.

Description

[Technical Field] CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to and the benefit of Korean Patent Application No. 10-2024-0015700 filed in the Korean Intellectual Property Office on February 1, 2024, the entire contents disclosed a literature of the relevant Korean patent application of which are incorporated herein by reference. The present disclosure relates to a device and a method for executing a test for power prediction of a battery management system. [Background Art] A battery management system can store and execute a power prediction program to predict a power of a battery device. After the power prediction program is installed in the battery management system, it is necessary to verify whether the power prediction program operates normally. Such a power prediction verification test is performed by an operator. When the test is performed at a temperature of -10 degrees to 60 degrees at a rate of 5 degrees in a range of state of charge (SOC) of 0 to 100% at a rate of SOC of 1%, the operator has to repeat the same operation 1500 times. In this way, in the conventional power prediction verification test, the number of test operations is very large, and a time required for the test is long. In addition, since a test operation is dependent on the operator, a test result may vary for each operator, and a reliability of the test result is not high. [Disclosure] [Technical Problem] The present disclosure attempts to provide a test device and a test method for power prediction capable of executing a power prediction test of a battery management system. [Technical Solution] An exemplary embodiment of the present disclosure provides a test device for power prediction of a battery management system which may include: a database including a plurality of power map tables indicating power according to a state of charge (SOC) and a temperature; a test executor generating a plurality of power prediction conditions with a combination of a plurality of SOCs and a plurality of temperatures in a power map table for a battery device, to which the battery management system is applied, among the plurality of power map tables, providing the battery management system with each of the plurality of power prediction conditions and a power prediction instruction corresponding to the each power prediction condition, and receiving a plurality of power prediction values according to the plurality of power prediction conditions from the battery management system; and a test comparator comparing each of the plurality of power prediction values with a normal range defined by a plurality of reference power values in the power map table based on a power prediction condition corresponding to the respective power prediction values. The test comparator may determine a first power value corresponding to a second SOC increased by a unit SOC from a first SOC corresponding to the power prediction condition and a first temperature corresponding to the power prediction condition, a second power value corresponding to a third SOC decreased by the unit SOC from the first SOC and the first temperature, a third power value corresponding to the first SOC and a second temperature increased by a unit temperature from the first temperature, and a fourth power value corresponding to the first SOC and a third temperature decreased by the unit temperature from the first temperature in the power map table. The test comparator may determine the normal range with an upper limit value obtained by adding a predetermined margin to a maximum value among the first to fourth power values and a lower limit value obtained by subtracting a predetermined margin from a minimum value among the first to fourth power values. The power map table may include a long-term discharge power map table, a short-term discharge power map table, a long-term charge power map table, and a short-term charge power map table, the long-term discharge power may be power generated when the battery device is discharged from a current SOC to a predetermined first reference SOC during a predetermined first period, the short-term discharge power may be power generated when the battery device is discharged from the current SOC to the first reference SOC during a second period shorter than the first period, the long-term charge power may be power required for the battery device to be charged from a current SOC to a predetermined second reference SOC during a predetermined third period, and the short-term charge power may be power required for the battery device to be charged from the current SOC to the second reference SOC during a fourth period shorter than the third period. The test executor may transmit a plurality of long-term discharge power prediction conditions and long-term discharge prediction instructions in the long-term discharge power map table to the battery management system, and receive a plurality of long-term discharge power prediction values based on t