Systems and methods for diagnosing seal integrity in a battery

Patent metadata

Field	Value
Publication number	US-10775263-B2
Application number	US-201715664761-A
Country	US
Kind code	B2
Filing date	Jul 31, 2017
Priority date	Jul 31, 2017
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

Systems and methods of detecting leakage and other issues with electrical battery housings are provided. By using an air compressor to alter the air pressure within a battery housing, a processor may detect an abnormal rate of change in the air pressure within the battery housing as compared to a rate of change of an ideal battery housing.

First claim

What is claimed is:

1. A method comprising:
sending, with a processor, a command to an air compressor to alter air pressure within a battery housing;
measuring, with the processor, a first rate of change of the air pressure within the battery housing;
detecting that the air pressure within the battery housing is at one of a predetermined minimum or a predetermined maximum air pressure;
sending, with the processor, a command to the air compressor to cease altering the air pressure within the battery housing, wherein detecting that the air pressure within the battery housing is at the one of the predetermined minimum or the predetermined maximum air pressure triggers sending the command to cease altering the air pressure;
upon ceasing to alter the air pressure within the battery housing, determining a second rate of change of the air pressure within the battery housing; and
determining, by the processor, that an issue with the battery housing exists based on one or both of the first rate of change and the second rate of change of the air pressure within the battery housing.

2. The method of claim 1 , wherein determining the second rate of change of the air pressure comprises determining an ambient air pressure.

3. The method of claim 2 , further comprising determining air pressure within the battery housing is at or near the ambient air pressure.

4. The method of claim 1 , wherein the air compressor is within the battery housing.

5. The method of claim 4 , wherein the battery housing comprises a first compartment storing a plurality of battery cells and a second compartment, wherein the air compressor is within the second compartment.

6. The method of claim 1 , wherein altering the air pressure within the battery housing comprises drawing air from the battery housing.

7. The method of claim 1 , wherein altering the air pressure within the battery housing comprises blowing air into the battery housing.

8. A system, comprising:
a processor; and
a memory coupled to the processor and comprising computer readable program code that when executed by the processor causes the processor to perform operations comprising:
send a command to an air compressor to alter air pressure within a battery housing;
measure a first rate of change of the air pressure within the battery housing;
detect that the air pressure within the battery housing is at one of a predetermined minimum or a predetermined maximum air pressure;
send a command to the air compressor to cease altering the air pressure within the battery housing, wherein detecting that the air pressure within the battery housing is at the one of the predetermined minimum or the predetermined maximum air pressure triggers sending the command to cease altering the air pressure;
upon sending the command to cease altering the air pressure within the battery housing, determine a second rate of change of the air pressure within the battery housing; and
determine that an issue with the battery housing exists based on one or both of the first rate of change and the second rate of change of the air pressure within the battery housing.

9. The system of claim 8 , wherein determining the second rate of change of the air pressure comprises determining an ambient air pressure.

10. The system of claim 9 , wherein the operations further comprise determining air pressure within the battery housing is at or near the ambient air pressure.

11. The system of claim 8 , wherein the air compressor is within the battery housing.

12. The system of claim 11 , wherein the battery housing comprises a first compartment storing a plurality of battery cells and a second compartment, wherein the air compressor is within the second compartment.

13. The system of claim 8 , wherein altering the air pressure within the battery housing comprises drawing air from the battery housing.

14. The system of claim 8 , wherein altering the air pressure within the battery housing comprises blowing air into the battery housing.

15. A computer program product, comprising:
a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising:
computer readable program code configured when executed by a processor to:
send a command to an air compressor to alter air pressure within a battery housing;
measure a first rate of change of the air pressure within the battery housing;
detect that the air pressure within the battery is at one of a predetermined minimum or a predetermined maximum air pressure;
send a command to the air compressor to cease altering the air pressure within the battery housing, wherein detecting that the air pressure within the battery is at the one of the predetermined minimum or the predetermined maximum air pressure triggers ceasing to alter the air pressure;
upon sending the command to cease altering the air pressure within the battery housing, determine a second rate of change of the air pressure within the battery housing; and
determine that an issue with the battery housing exists based on one or both of the first rate of change and the second rate of change of the air pressure within the battery housing.

16. The computer program product of claim 15 , wherein altering the air pressure within the battery housing comprises drawing air from the battery housing.

17. The computer program product of claim 15 , wherein altering the air pressure within the battery housing comprises blowing air into the battery housing.

18. The computer program product of claim 15 , wherein determining the second rate of change of the air pressure comprises determining an ambient air pressure.

19. The computer program product of claim 18 , wherein the operations further comprise determining air pressure within the battery housing is at or near the ambient air pressure.

20. The computer program product of claim 15 , wherein the air compressor is within the battery housing.

Assignees

• Nio Usa Inc

Inventors

• Ing Adam H
• Smith Alexander J
• Newman Austin L

Classifications

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/271

  Lids or covers for the racks or secondary casings · CPC title

• H01M50/213

  adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) · CPC title

• B60L50/64

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• H01M10/4228 Primary

  Leak testing of cells or batteries · CPC title