System and method for detecting a lithium dendrite in a battery cell

Patent metadata

Field	Value
Publication number	US-12418057-B2
Application number	US-202217666673-A
Country	US
Kind code	B2
Filing date	Feb 8, 2022
Priority date	Feb 8, 2022
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A system for detecting a lithium dendrite in a battery cell is provided. The system includes the battery cell including an anode and a cathode. The battery cell further includes a conductive prewarning layer disposed between the anode and the cathode and constructed with a porous material. The battery cell further includes a separator layer disposed between the conductive prewarning layer and the cathode, wherein the separator layer is configured for allowing ions to pass through the separator layer. The system further includes a sensor electrically connected to the anode and the conductive prewarning layer and monitoring data related to a voltage potential between the anode and the conductive prewarning layer. The data is useful to identify a decrease in the voltage potential between the anode and the conductive prewarning layer and diagnose existence of the lithium dendrite.

First claim

What is claimed is:

1. A system for detecting a lithium dendrite in a battery cell, the system comprising:
the battery cell including:
an anode;
a cathode;
a conductive prewarning layer disposed between the anode and the cathode and constructed with a porous material; and
a separator layer disposed between the conductive prewarning layer and the cathode, wherein the separator layer is configured for allowing ions to pass through the separator layer; and

a sensor electrically connected to the anode and the conductive prewarning layer and monitoring data related to a voltage potential between the anode and the conductive prewarning layer, wherein the sensor is electrically connected to and receives electrical power through the anode and the cathode; and
a computerized warning controller configured to:
monitor the data related to the voltage potential between the anode and the conductive prewarning layer;
analyze the data to identify a decrease in the voltage potential between the anode and the conductive prewarning layer and diagnose an existence of the lithium dendrite, and
generate a warning based upon the analyzing, wherein the warning is generated when the decrease includes a voltage potential greater than zero between the anode and the conductive prewarning layer.

2. The system of claim 1 , wherein the conductive prewarning layer is constructed of one of aluminum, nickel, and tin.

3. The system of claim 1 , wherein the battery cell further includes a porous and non-conductive spacer between the anode and the conductive prewarning layer.

4. The system of claim 3 , wherein the porous and non-conductive spacer is constructed with a ceramic material.

5. The system of claim 1 , wherein the computerized warning controller further includes programming to isolate the battery cell relative to a plurality of other battery cells in the system based upon the analyzing.

6. The system of claim 1 , including a user display configured to display the warning.

7. The system of claim 1 , including a porous nonelectrically conductive spacer located between the conductive prewarning layer and the anode, wherein the porous nonelectrically conductive spacer, the conductive prewarning layer, and the separator layer are inundated with an electrolyte solution.

8. A device including a system for detecting a lithium dendrite in a battery cell, the device comprising:
the battery cell including:
an anode;
a cathode;
a conductive prewarning layer disposed between the anode and the cathode and constructed with a porous material; and
a separator layer disposed between the conductive prewarning layer and the cathode, wherein the separator layer is configured for allowing ions to pass through the separator layer; and

a sensor electrically connected to the anode and the conductive prewarning layer and monitoring data related to a voltage potential between the anode and the conductive prewarning layer, where in the sensor is electrically connected to and receives electrical power from an external power source separate from the anode and cathode; and
a computerized warning controller configured to:
monitor the data related to the voltage potential between the anode and the conductive prewarning layer;
analyze the data to identify a decrease in the voltage potential between the anode and the conductive prewarning layer and diagnose an existence of the lithium dendrite; and
generate a warning based upon the analyzing.

9. The device of claim 8 , including a vehicle with the device located in the vehicle; and
wherein the battery cell is disposed within the vehicle.

10. The device of claim 9 , wherein the vehicle includes a device power system configured to receive electrical power from the battery cells and provide motive force to the vehicle.

11. The device of claim 9 , wherein the vehicle includes a user display configured to display the warning.

12. The device of claim 8 , further comprising a plurality of battery cells; and
further comprising a plurality of sensors, wherein each of the plurality of sensors is electrically connected to a respective one of the plurality of battery cells.

13. The device of claim 8 , wherein the conductive prewarning layer is constructed of one of aluminum, nickel, and tin.

14. The device of claim 8 , wherein the battery cell further includes a porous and non-conductive spacer between the anode and the conductive prewarning layer.

15. The device of claim 14 , wherein the porous and non-conductive spacer is constructed with a ceramic material.

16. The device of claim 8 , wherein the computerized warning controller further includes programming to isolate the battery cell relative to a plurality of other battery cells in the device based upon the analyzing.

17. The device of claim 8 , including a porous nonelectrically conductive spacer located between the conductive prewarning layer and the anode, wherein the porous nonelectrically conductive spacer, the conductive prewarning layer, and the separator layer are inundated with an electrolyte solution.

18. The device of claim 8 , wherein the warning is generated when the decrease includes a voltage potential greater than zero between the anode and the conductive prewarning layer.

19. The device of claim 18 , wherein the conductive prewarning layer is constructed of tin.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Dadheech Gayatri Vyas
• Verbrugge Mark W
• Koch Brian J
• Gao Jing
• Warey Alok

Classifications

• H01M50/483

  Inorganic material · CPC title

• H01M50/449

  having a layered structure · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M2220/20

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