Thermally activated retractable EMC protection

Patent metadata

Field	Value
Publication number	US-12537263-B2
Application number	US-202217822580-A
Country	US
Kind code	B2
Filing date	Aug 26, 2022
Priority date	Aug 26, 2022
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A system and method for flushing the electrolyte out of an electrolyte flushable battery apparatus during a thermal runaway event. At least one condition of the electrolyte flushable battery apparatus is monitored to detect a potential thermal runaway event based on the at least one condition exceeding a threshold value. In response the inlet valve and outlet valves on the battery apparatus are opened. A flushing liquid is flushed or pumped through the battery apparatus where the flushing liquid enters the apparatus through the inlet valve and leaves the apparatus through the outlet valve. The flushing liquid is then stored in a reservoir.

First claim

What is claimed is:

1 . A method for flushing an electrolyte out of an electrolyte flushable battery apparatus, the method comprising:
monitoring at least one condition of the electrolyte flushable battery apparatus; detecting a potential thermal runaway event based on the at least one condition exceeding a threshold value; opening an inlet flushing valve and an outlet flushing valve on the electrolyte flushable battery apparatus; releasing a salt packet into the electrolyte within the electrolyte flushable battery apparatus; and flushing a liquid through the electrolyte flushable battery apparatus, wherein the liquid enters the electrolyte flushable battery apparatus through the inlet flushing valve and leaves the electrolyte flushable battery apparatus through the outlet flushing valve.

2 . The method of claim 1 , wherein detecting the potential thermal runaway event further comprises:
detecting that a voltage threshold has been exceeded.

3 . The method of claim 1 , wherein detecting the potential thermal runaway event further comprises:
detecting that a temperature threshold has been exceeded.

4 . The method of claim 1 , wherein detecting the potential thermal runaway event further comprises:
detecting vented gases.

5 . The method of claim 1 , wherein the liquid is a non-conductive liquid.

6 . The method of claim 1 , further comprising:
generating a notification that a flushing event has occurred.

7 . The method of claim 1 , further comprising:
replacing the liquid in response to a flushing event.

8 . An electrolyte flushable battery apparatus comprising:
a battery casing; an electrolyte liquid disposed within the battery casing; a salt packet is disposed within the battery casing; an inlet flushing valve disposed on a first end of the battery casing; and an outlet flushing valve disposed on a second end of the battery casing.

9 . The electrolyte flushable battery apparatus of claim 8 , wherein the inlet flushing valve is hermetically sealed.

10 . The electrolyte flushable battery apparatus of claim 8 . wherein the outlet flushing valve is hermetically sealed.

11 . The electrolyte flushable battery apparatus of claim 9 , wherein the inlet flushing valve and outlet flushing valve are electrically controlled.

12 . The electrolyte flushable battery apparatus of claim 9 , wherein the inlet flushing valve and outlet flushing valve are self.

13 . The electrolyte flushable battery apparatus of claim 9 . wherein the inlet flushing valve and the outlet flushing valve are self-acting.

14 . A thermal runaway protection system comprising:
a supply reservoir containing a liquid; an electrolyte flushable battery apparatus comprising:
a battery casing;
an electrolyte liquid disposed within the battery casing;
a salt packet is disposed within the battery casing configured to be released into the electrolyte liquid in response to a thermal runaway event;
an inlet flushing valve disposed on a first end of the battery casing configured to open in response to the thermal runaway event; and
an outlet flushing valve disposed on a second end of the battery casing configured to open in response to the thermal runaway event;
an outlet reservoir configured to receive the liquid and the electrolyte liquid during flushing; an inlet manifold connected to the inlet flushing valve; and an outlet manifold connected to the outlet flushing valve and the outlet reservoir, wherein the liquid is configured to flow through the electrolyte flushable battery apparatus in response to the thermal runaway event in the electrolyte flushable battery apparatus.

15 . The thermal runaway protection system of claim 14 . wherein the-flushing liquid is a non-conductive liquid.

16 . The thermal runaway protection system of claim 14 , further comprising:
at least one sensor configured to monitor at least one condition of the electrolyte flushable battery apparatus indicative of the thermal runaway event.

17 . The thermal runaway protection system of claim 16 , wherein the at least one condition is temperature of the electrolyte flushable battery apparatus.

18 . The thermal runaway protection system of claim 16 , wherein the at least one condition is voltage of the electrolyte flushable battery apparatus.

19 . The thermal runaway protection system of claim 16 . where the at least one condition exceeds a threshold time.

20 . The thermal runaway protection system of claim 16 , further comprising:
a battery monitoring module configured to determine the electrolyte flushable battery apparatus is experiencing the thermal runaway event; and a battery flushing module configured to receive a signal from the battery monitoring module of the electrolyte flushable battery apparatus is experiencing the thermal runaway event, and configured to release the liquid to flush the electrolyte liquid.

21 . The thermal runaway protection system of claim 14 , further comprising:
a pump configured to pump the liquid through the electrolyte flushable battery apparatus.

Assignees

• IBM

Inventors

• Werner John S
• Hicks Andrew C M
• Singer Noah
• Singh Prabjit
• Khalili Sadegh

Classifications

• H01M50/636

  Closing or sealing filling ports, e.g. using lids · CPC title

• H01M50/618

  Pressure control · CPC title

• H01M50/383 Primary

  Flame arresting or ignition-preventing means · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title