Cell having irreversible heat sensor

• US 20070054178A1
• Filed: 08/29/2006
• Published: 03/08/2007
• Est. Priority Date: 08/30/2005
• Status: Abandoned Application

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Yoon, Seog, Jung, Soon, Moon, Jeong
• Application Number:
  US11/511,580
• Publication Number:
  US 20070054178A1
• Time in Patent Office: Days
• US Class Current: 429/62
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/486 for measuring temperature
• CPC Class Codes: H01M 10/488 Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
• CPC Class Codes: H01M 50/572 Means for preventing undesired use or discharge
• CPC Class Codes: H01M 50/581 in response to temperature
• CPC Class Codes: H01M 6/5044 Cells or batteries structurally combined with cell condition indicating means
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Disclosed is a battery having a heat sensor, and more particularly a battery having an irreversible heat senor capable of indicating temperature variation of two or more levels, or three or more levels if necessary.

Claims

1. A battery having an irreversible heat sensor capable of indicating temperature variation of two or more levels.

2. The battery according to claim 1, wherein the battery is a secondary battery.

3. The battery according to claim 1, wherein the temperature variation in the irreversible heat senor is indicated by a change in color of the irreversible heat senor.

4. The battery according to claim 1, wherein the irreversible heat senor is a thermal paper, a temperature sensible crayon, or a temperature sensible manicure.

5. The battery according to claim 1, wherein the irreversible heat senor has variation of indication at a temperature ranging from 55°

C. to 65°

C., and from 75°

C. to 85°

C.

6. The battery according to claim 1, wherein the irreversible heat senor indicates the temperature variation of three levels.

7. The battery according to claim 6, wherein the irreversible heat senor has variation of indication at a temperature ranging from 55°

C. to 65°

C., from 75°

C. to 85°

C., and from 95°

C. to 105°

C.

8. The battery according to claim 1, wherein the irreversible heat senor is formed by applying to a substrate an irreversible sensitive paint where a color is varied depending on temperature but the varied color does not return to an previous color again.

9. The battery according to claim 8, wherein the temperature sensitive paint changes its color by any one of a change in a crystal structure, a change of pH, thermal decomposition of temperature sensitive paint components, and a change in an electron number between an electron acceptor and donor.

10. The battery according to claim 8, wherein the temperature sensitive paint changes its color at two or more different temperatures.

11. The battery according to claim 8, wherein the temperature sensitive paint has a color tone which varies depending on temperature.

12. The battery according to claim 8, wherein the irreversible heat senor is formed by disposing two or more different temperature sensitive paints in parallel.

13. The battery according to claim 5, wherein the temperature sensitive paint is a mixture of two or more temperature sensitive paints, wherein each temperature sensitive paint has its own single color-changing point different from those of others.

14. The battery according to claim 1, further comprising a submersion label in addition to the irreversible heat senor.

15. The battery according to claim 14, wherein the submersion label is disposed inside a plastic molding constituting the battery.

16. The battery according to claim 14, wherein the irreversible heat senor and the submersion label are integrally formed.

17. The battery according to claim 1, wherein the battery is a secondary battery.

18. The battery according to claim 17, wherein the secondary battery is a lithium-ion secondary battery.