Electrochemical cell housing

Patent metadata

Field	Value
Publication number	US-11837748-B2
Application number	US-202117149329-A
Country	US
Kind code	B2
Filing date	Jan 14, 2021
Priority date	Jun 29, 2017
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

Systems and methods for controlling the emission of gases and/or flames emitted from one or more electrochemical cells are disclosed. In one exemplary embodiment, gas emitted from an electrochemical cell located within an interior of an enclosure may be flowed through a flow restriction to reduce a pressure and/or temperature of the gas and/or the gas may be flowed through a catalyst prior to exiting through an outlet of the enclosure.

First claim

What is claimed is:

1. A method of mitigating a venting and/or thermal runaway event of an electrochemical cell, the method comprising:
reducing a pressure of a gas emitted from the electrochemical cell;
reducing a temperature of the gas emitted from the electrochemical cell as a result of the reduction of pressure of the gas such that the temperature of the gas is less than an auto-ignition temperature of the gas;
exposing the gas emitted from the electrochemical cell to at least one catalyst prior to flowing the gas through an outlet of an enclosure that the electrochemical cell is located in;
rupturing one or more seals above a threshold pressure, wherein the one or more seals seal a catalyst of the at least one catalyst under a non-oxidizing atmosphere; and
flowing the gas at the reduced pressure and temperature through the outlet of the enclosure that the electrochemical cell is located in,
wherein reducing the pressure and the temperature of the gas comprises flowing the gas through at least one flow restriction arranged between an interior chamber of the enclosure and the outlet of the enclosure, and wherein the pressure of the gas is reduced by a factor between or equal to 5 and 20.

2. The method of claim 1 , wherein the temperature of the gas is reduced by a factor between or equal to 2 and 5.

3. The method of claim 1 , further comprising flowing the gas through a tortuous flow path between the interior chamber of the enclosure and the outlet.

4. The method of claim 3 , further comprising redirecting the gas from a predetermined venting direction of the electrochemical cell towards an inlet to the flow path extending from the interior chamber to the outlet.

5. The method of claim 1 , further comprising exposing the gas emitted from the electrochemical cell to at least one catalyst located upstream from the at least one flow restriction prior to flowing the gas through the outlet, and wherein the at least one catalyst.

6. The method of claim 1 , further comprising exposing the gas emitted from the electrochemical cell to at least one catalyst located downstream from the at least one flow restriction prior to flowing the gas through the outlet.

7. A method of mitigating a venting and/or thermal runaway event of an electrochemical cell, the method comprising:
reducing a pressure and a temperature of a gas emitted from the electrochemical cell such that the temperature of the gas is less than an auto-ignition temperature of the gas;
rupturing one or more seals above a threshold pressure, wherein the one or more seals seal a catalyst under a non-oxidizing atmosphere;
exposing the gas to the catalyst; and
flowing the gas at the reduced pressure and temperature through an outlet of an enclosure that the electrochemical cell is located in,
wherein reducing the pressure and the temperature of the gas comprises flowing the gas through at least one flow restriction arranged between an interior chamber of the enclosure and the outlet of the enclosure.

8. The method of claim 7 , wherein the at least one catalyst catalyzes lithium.

9. The method of claim 7 , further comprising exposing the gas emitted from the electrochemical cell to the catalyst upstream from the at least one flow restriction.

10. The method of claim 7 , further comprising exposing the gas emitted from the electrochemical cell to the catalyst downstream from the at least one flow restriction.

11. The method of claim 7 , wherein the pressure of the gas is reduced by a factor between or equal to 5 and 20.

12. The method of claim 7 , wherein the temperature of the gas is reduced by a factor between or equal to 2 and 5.

13. A method of mitigating a venting and/or thermal runaway event of an electrochemical cell, the method comprising:
reducing a pressure of a gas emitted from the electrochemical cell;
reducing a temperature of the gas emitted from the electrochemical cell such that the temperature of the gas is less than an auto-ignition temperature of the gas;
exposing the gas emitted from the electrochemical cell to at least one catalyst prior to flowing the gas through an outlet of an enclosure that the electrochemical cell is located in;
rupturing one or more seals above a threshold pressure, wherein the one or more seals seal a catalyst of the at least one catalyst under a non-oxidizing atmosphere; and
flowing the gas at the reduced pressure and temperature through the outlet of the enclosure that the electrochemical cell is located in,
wherein reducing the pressure and the temperature of the gas comprises flowing the gas through at least one flow restriction arranged between an interior chamber of the enclosure and the outlet of the enclosure, and wherein an inner diameter of the at least one flow restriction is between or equal to about 0.020 inches and 0.030 inches.

14. The method of claim 13 , wherein the pressure of the gas is reduced by a factor between or equal to 5 and 20.

15. The method of claim 13 , wherein the temperature of the gas is reduced by a factor between or equal to 2 and 5.

16. The method of claim 13 , further comprising flowing the gas through a tortuous flow path between the interior chamber of the enclosure and the outlet.

17. The method of claim 16 , further comprising redirecting the gas from a predetermined venting direction of the electrochemical cell towards an inlet to the flow path extending from the interior chamber to the outlet.

Assignees

• Sargent Mfg Co

Inventors

• Bryla Mark

Classifications

• H01M50/383 Primary

  Flame arresting or ignition-preventing means · CPC title

• H01M50/3425

  in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member · CPC title

• H01M50/367

  Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems · CPC title

• H01M50/392 Primary

  with means for neutralising or absorbing electrolyte; with means for preventing leakage of electrolyte through vent holes · CPC title

• H01M50/394

  Gas-pervious parts or elements · CPC title