BATTERY SAFETY SYSTEMS, METHODS AND COMPOSITIONS

• US 20120244409A1
• Filed: 05/07/2012
• Published: 09/27/2012
• Est. Priority Date: 09/21/2010
• Status: Abandoned Application

• Current Assignee: Victoria Link Limited (Victoria University)
• Original Assignee: Victoria Link Limited (Victoria University)
• Inventors: OK, Jeongbin
• Application Number:
  US13/466,034
• Publication Number:
  US 20120244409A1
• Time in Patent Office: Days
• US Class Current: 429/130
• CPC Class Codes: C09D 7/40 Additives
• CPC Class Codes: C09D 7/41 Organic pigments; Organic dyes
• CPC Class Codes: C09D 7/63 organic
• CPC Class Codes: H01M 2200/00 Safety devices for primary or secondary batteries
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 50/109 of button or coin shape
• CPC Class Codes: H01M 50/586 inside the batteries, e.g. incorrect connections of electrodes
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Improved button cell safety systems, methods and composition are herein disclosed. According to one embodiment, the button cell includes a cathode shell. An insulator ring with an anode cavity is at least partially positioned within the cathode shell. An anode plate is inserted in the insulator ring to engage the anode cavity. A pressure sensitive conductive disc is configured for actuation between an active cell state and a default inactive cell state

Claims

1. A button cell comprising:

a cathode shell;

an insulator ring comprising an anode cavity at least partially positioned within the cathode shell;

an anode plate engaging the anode cavity in the insulator ring; and

a pressure sensitive conductive disc configured for actuation between a default inactive cell state and an active cell state.

2. The button cell recited in claim 1, wherein the pressure sensitive conductive disc is positioned a maximum clearance distance above the anode in the default inactive cell state.

3. The button cell recited in claim 1, wherein the pressure sensitive conductive disc is configured to conductively contact the anode in the active cell state.

4. The button cell recited in claim 3, wherein the pressure sensitive conductive disc is configured to conductively contact the anode in the active cell state by application of a compressive force against the conductive disc.

5. The button cell recited in claim 4, wherein the pressure sensitive conductive disc is configured to automatically return to the default inactive cell state in response to releasing the compressive force against the conductive disc.

6. The button cell recited in claim 1, further comprising a mitigating composition applied on a surface of at least one of the anode plate, cathode shell and conductive disc.

7. The button cell recited in claim 6, wherein the mitigating composition comprises at least one component selected from group consisting of:

an aversive agent component, a colorant component, a salivating agent component and an emetic component.

8. The button cell recited in claim 1, wherein the insulator ring further comprises a conductive disc cavity and the pressure sensitive conductive disc engages the conductive disc cavity in the insulator ring.

9. The button cell recited in claim 2, further comprising an adhesive insulator positioned between the pressure sensitive conductive disc and the anode plate to maintain the maximum clearance distance between the pressure sensitive conductive disc and the anode plate in the default inactive cell state.

10. The button cell recited in claim 1, further comprising a sealing compound applied on a top exposed surface of at least one of the anode plate, cathode shell and conductive disc to create an upper sealing layer.

11. The button cell recited in claim 10, wherein the upper sealing layer is a water tight seal.

12. The button cell recited in claim 11, further comprising a mitigating composition applied on a surface of at least one of the anode plate, cathode shell, pressure sensitive conductive disc and upper sealing layer.

13. The button cell recited in claim 12, wherein the mitigating composition comprises at least one component selected from group consisting of:

an aversive agent component, a colorant component, a salivating agent component and an emetic component.

14. The button cell recited in claim 1, wherein the insulator ring is integrated with a mitigating composition.

15. The button cell recited in claim 1, wherein the mitigating composition is a colorant composition comprising black edible activated carbon.

16. The button cell recited in claim 1, wherein the insulator ring comprises a lower insulator portion and an upper insulator portion.

17. The button cell recited in claim 16, wherein the upper insulator portion is integrated with a mitigating composition.

18. The button cell recited in claim 17, wherein the mitigating composition is a colorant composition comprising black edible activated carbon.

19. The button cell recited in claim 17, wherein the anode plate is located within the lower insulator portion and conductive disc cavity is located within the upper insulator portion.

20. The button cell recited in claim 1, wherein the pressure sensitive conductive disk is a substantially flat disc of metal or a domed disc of metal.

21. The button cell recited in claim 20, wherein the pressure sensitive conductive disc is formed from at least one component selected from the group consisting of:

stainless steel, brass and copper.

22. The button cell recited in claim 2, wherein the maximum clearance distance is 1 mm.