Method for battery management and battery management system

Patent metadata

Field	Value
Publication number	US-10147980-B2
Application number	US-201515313648-A
Country	US
Kind code	B2
Filing date	Apr 27, 2015
Priority date	May 28, 2014
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

The invention relates to a method for managing a battery comprising a plurality of battery cells, wherein a maximum value of a current that can be delivered by the battery is adjusted on the basis of a frequency distribution ( 44 ) of a root mean square current delivered by the battery. The invention further relates to a battery management system and a computer program for carrying out said method as well as to a motor vehicle comprising a battery which includes a battery management system of said type.

First claim

The invention claimed is:

1. A method for managing a battery ( 16 ) comprising a plurality of battery cells ( 19 ), the method comprising:
adjusting a maximum value of a current delivered by the battery ( 16 ) based on a frequency distribution ( 44 ) of a root mean square current delivered by the battery ( 16 );
determing data about a proportion in a low current intensity range ( 36 ), a first proportion in a first high current intensity range ( 38 ), and a second proportion in a second high current intensity range ( 40 ), from the frequency distribution ( 44 ); and
controlling the battery ( 16 ) using a function of setpoint values for the proportions in the first and second high current intensity range ( 38 , 40 );
wherein the first high current intensity range ( 38 ) is set lower than the second high current intensity range ( 40 ).

2. The method according to claim 1 , characterized in that the control only takes place within a warranted operating time for the battery ( 16 ).

3. The method according to claim 2 , characterized in that the closer a current operating time gets to an end of the warranted operating time, the control is weakened as a function of a ratio of a current operating time to the warranted operating time.

4. The method according to claim 1 , characterized in that a first setpoint value for the first high current intensity range ( 38 ) lies between 10% and 50%.

5. The method according to claim 1 , characterized in that the first high current intensity range ( 38 ) lies between 60 A and 100 A and the second high current intensity range ( 40 ) between 100 A and 130 A.

6. A non-transitory computer readable medium having a computer program for carrying out one of the methods according to claim 1 when the program is executed on a programmable computer device.

7. The method according to claim 1 , characterized in that a second setpoint value for the high current intensity range ( 40 ) lies between 1% and 10%.

8. The method according to claim 1 , characterized in that a first setpoint value for the first high current intensity range ( 38 ) lies between 10% and 50% and a second setpoint value for the high current intensity range ( 40 ) lies between 1% and 10%.

9. A battery management system of a battery ( 16 ) comprising a plurality of battery cells ( 19 ), said battery management system comprising a unit ( 26 ) for determining a root mean square current delivered by the battery ( 16 ), a unit ( 30 ) for evaluating a frequency distribution ( 44 ) of the root mean square current delivered by the battery ( 16 ) and a unit ( 32 ) for adjusting a maximum value of a current that can be delivered by the battery ( 16 ) on the basis of results of the unit ( 30 ) for evaluating the frequency distribution ( 44 ), wherein the battery management system of the battery ( 16 ) determines data about a proportion in a low current intensity range ( 36 ), a first proportion in a first high current intensity range ( 38 ), and a second proportion in a second high current intensity range ( 40 ), from the frequency distribution ( 44 ); and controls the battery ( 16 ) using a function of setpoint values for the proportions in the first and second high current intensity range ( 38 , 40 ), wherein the first high current intensity range ( 38 ) is set lower than the second high current intensity range ( 40 ).

10. A vehicle ( 10 ) comprising a battery ( 16 ) which has a battery management system according to claim 9 .

Assignees

• Bosch Gmbh Robert

Inventors

• Stimm Frank
• Lemke Andreas
• Mangold Benjamin
• Korn Christian
• Dufaux Thomas

Classifications

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/855

  with circuits adapted for supplying loads from the battery · CPC title

• H01M50/204

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• B60L11/1857

  Operations & Transport · mapped topic

• B60L2260/162

  of electrical cells or capacitors · CPC title