Testing system and method for testing a battery cell

• US 8,736,273 B2
• Filed: 03/28/2011
• Issued: 05/27/2014
• Est. Priority Date: 04/15/2010
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Stancu, Janina, Oswandel, Kenneth J.
• Primary Examiner(s): Dunn, Drew A
• Assistant Examiner(s): DIBENEDETTO, MICHAEL N
• Application Number:
  US13/073,033
• Publication Number:
  US 20110254558A1
• Time in Patent Office: 1,156 Days
• Field of Search: 324/425, 324/426, 324/429, 324/430, 324/432, 324/447, 324/450, 320/104
• US Class Current: 324/426
• CPC Class Codes: G01R 27/025 Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
• CPC Class Codes: G01R 31/385 Arrangements for measuring battery or accumulator variables for monitoring G01R31/382
• CPC Class Codes: G01R 31/3865 related to manufacture, e.g. testing after manufacture
• CPC Class Codes: H01M 10/4285 Testing apparatus
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A testing system and a method for testing a battery cell are provided. The system includes a nest member that receives the battery cell, and a clamping device that secures a first battery tab between first and second connectors, and secures a second battery tab between third and fourth connectors. The system further includes a voltmeter that measures a voltage level between the first and third connectors when the first and second battery tabs are contacting the first and third connectors, respectively. The system further includes an ohmmeter that measures a first resistance level between a first portion of the outer housing and the first connector when the first battery tab is contacting the first connector.

Claims

1. A testing system for a battery cell therein, the battery cell having an outer housing and first and second battery tabs extending from the outer housing, comprising:

a nest member having a top plate and first and second guide members, the first and second guide members being coupled to a top surface of the top plate and being disposed parallel to one another, the top plate and the first and second guide members defining a region for receiving the battery cell on the top surface;

a clamping device having a rotatable plate that is rotatably coupled to a support member, the rotatable plate having first and third connectors disposed on a bottom surface of the rotatable plate, the rotatable plate configured to secure the first battery tab between the first connector and a second connector, and to secure the second battery tab between the third connector and a fourth connector;

a voltmeter electrically coupled to the first and third connectors on the rotatable plate of the clamping device, the voltmeter configured to measure a voltage level between the first and third connectors when the first and second battery tabs are contacting the first and third connectors, respectively, and to send a voltage level value indicative of the voltage level to a computer;

an ohmmeter electrically coupled to the first connector on the rotatable plate, the ohmmeter configured to measure a first resistance level between a first portion of the outer housing and the first connector when the first battery tab is contacting the first connector and to send a first resistance level value indicative of the first resistance level to the computer; and

the computer configured to generate a validation message indicating the battery cell is operating as desired if the voltage level is within a desired voltage level range and the first resistance level is within a first resistance level range.

2. The testing system of claim 1, wherein the ohmmeter is electrically coupled to the third connector on the rotatable plate, the ohmmeter is further configured to measure a second resistance level between the first portion of the outer housing and the third connector when the second battery tab is contacting the third connector and to send a second resistance level value indicative of the second resistance level to the computer.

3. The testing system of claim 2, wherein the computer is further configured to generate the validation message indicating the battery cell is operating as desired if the voltage level is within the desired voltage level range, and the first resistance level is within the first resistance level range, and the second resistance level is within a second resistance level range.

4. The testing system of claim 2, wherein the ohmmeter is further configured to measure a third resistance level between the first portion of the outer housing and a second portion of the outer housing and to send a third resistance level value indicative of the third resistance level to the computer.

5. The testing system of claim 4, wherein the computer is further configured to generate the validation message indicating the battery cell is operating as desired if the voltage level is within the desired voltage level range, and the first resistance level is within the first resistance level range, and the second resistance level is within the second resistance level range, and the third resistance level is within a third resistance level range.

6. The testing system of claim 1, further comprising:

a first swing arm assembly having a first contact, the first swing arm assembly configured to move the first contact such that the first contact contacts the first portion of the outer housing of the battery cell; and

the ohmmeter being electrically coupled to the first contact, the ohmmeter being configured to measure the first resistance level between the first contact and the first connector when the first battery tab is contacting the first connector and the first contact is contacting the outer housing.

7. The testing system of claim 1, wherein the computer is further configured to induce a display device to display the validation message.

8. The testing system of claim 1, wherein the computer is further configured to generate a fail message indicating the battery cell is not operating as desired if the voltage level is not within the desired voltage level range or if the first resistance level is not within the first resistance level range.

9. The testing system of claim 8, wherein the computer is further configured to induce a display device to display the fail message.

10. A method of testing a battery cell disposed on a nest member of a testing system, comprising:

providing a nest member having a top plate and first and second guide members, the first and second guide members being coupled to a top surface of the top plate and being disposed parallel to one another;

disposing the battery cell on the top surface of the top plate between the first and second guide members;

securing a first battery tab of the battery cell between first and second connectors utilizing a clamping device;

securing a second battery tab of the battery cell between third and fourth connectors utilizing the clamping device;

measuring a voltage level between the first and third connectors when the first and second battery tabs are contacting the first and third connectors, respectively, utilizing a voltmeter;

sending a voltage level value indicative of the voltage level from the voltmeter to a computer;

measuring a first resistance level between a first portion of the outer housing and the first connector when the first battery tab is contacting the first connector utilizing an ohmmeter;

sending a first resistance level value indicative of the first resistance level from the ohmmeter to the computer;

generating a validation message indicating the battery cell is operating as desired if the voltage level is within a desired voltage level range and the first resistance level is within a first resistance level range utilizing the computer; and

generating a fail message indicating the battery cell is not operating as desired if the voltage level is not within the desired voltage level range or the first resistance level is not within the first resistance level range utilizing the computer.

11. The method of claim 10, further comprising:

measuring a second resistance level between the first portion of the outer housing and the third connector when the second battery tab is contacting the third connector utilizing the ohmmeter; and

sending a second resistance level value indicative of the second resistance level from the ohmmeter to the computer.

12. The method of claim 11, further comprising generating the validation message indicating the battery cell is operating as desired if the voltage level is within the desired voltage level range, and the first resistance level is within the first resistance level range, and the second resistance level is within a second resistance level range, utilizing the computer.

13. The method of claim 10, further comprising measuring a third resistance level between the first portion of the outer housing and a second portion of the outer housing utilizing the ohmmeter;

and

sending a third resistance level value indicative of the third resistance level from the ohmmeter to the computer.

14. The method of claim 13, further comprising generating the validation message indicating the battery cell is operating as desired if the voltage level is within the desired voltage level range, and the first resistance level is within the first resistance level range, and the second resistance level is within the second resistance level range, and the third resistance level is within a third resistance level range, utilizing the computer.

15. The method of claim 10, further comprising displaying the validation message on a display device utilizing the computer.

16. The method of claim 10, further comprising displaying the fail message on a display device utilizing the computer.