Electrochemical cells and electrochemical cell systems with thermal insulation battery packs

Patent metadata

Field	Value
Publication number	US-2023282906-A1
Application number	US-202318118416-A
Country	US
Kind code	A1
Filing date	Mar 7, 2023
Priority date	Mar 7, 2022
Publication date	Sep 7, 2023
Grant date	—

Abstract

Embodiments described herein relate to electrochemical cells and electrochemical cell systems with thermal insulation systems, and methods of producing the same. An electrochemical cell can include an anode material disposed on an anode current collector, a cathode material disposed on a cathode current collector, a separator disposed between the anode material and the cathode material, and an insulating structure disposed around and containing the anode material, anode current collector, cathode material, cathode current collector, and the separator. The anode material and/or the cathode material includes a semi-solid electrode material. The semi-solid electrode material includes an active material and a conductive material in a liquid electrolyte. The liquid electrolyte has an electrolyte salt concentration of at least about 2.0 M. In some embodiments, the insulating structure includes a frame with a first wall and a second wall disposed therein.

First claim

1 . An electrochemical cell, comprising:
an anode material disposed on an anode current collector; a cathode material disposed on a cathode current collector; a separator disposed between the anode material and the cathode material; and an insulating structure disposed around and configured to contain the anode, the anode current collector, the cathode, the cathode current collector, and the separator, wherein at least one of the anode and the cathode includes a semi-solid electrode material, the semi-solid electrode material including an active material in a liquid electrolyte, the liquid electrolyte having an electrolyte salt concentration of at least about 2.0 M.

2 . The electrochemical cell of claim 1 , wherein the insulating structure includes a frame with a first wall and a second wall disposed therein.

3 . The electrochemical cell of claim 2 , wherein the first wall and the second wall are at least partially composed of glass.

4 . The electrochemical cell of claim 2 , wherein a region between the first wall and the second wall is evacuated.

5 . The electrochemical cell of claim 2 , wherein a region between the first wall and the second wall is filled with an inert gas.

6 . The electrochemical cell of claim 1 , wherein the insulating frame includes a laminate material.

7 . The electrochemical cell of claim 6 , wherein the laminate material includes Reflectix® insulating material.

8 . The electrochemical cell of claim 1 , wherein the insulating frame includes a sputtered material.

9 . The electrochemical cell of claim 8 , wherein the sputtered material includes at least one of silver or aluminum.

10 . The electrochemical cell of claim 1 , further comprising:
a vent, the vent integrated into the insulating frame.

11 . The electrochemical cell of claim 10 , wherein the vent includes a first valve configured to allow air into the electrochemical cell from outside the electrochemical cell and a second valve configured to allow air out of the electrochemical cell from inside the electrochemical cell.

12 . The electrochemical cell of claim 11 , further comprising an air blower configured to push air through the first valve.

13 . The electrochemical cell of claim 11 , further comprising a temperature sensor, the temperature sensor in communication with the first valve and the second valve and configured to open at least one of the first valve or the second valve when a temperature inside the electrochemical cell exceeds a threshold value.

14 . The electrochemical cell of claim 1 , wherein the semi-solid electrode material further includes a conductive material.

15 . An electrochemical cell module, comprising:
a first electrochemical cell; a second electrochemical cell; and a heat transfer fin disposed between the first electrochemical cell and the second electrochemical cell, the heat transfer fin including a plurality of bending strips and a plurality of strips of heat transfer material coupled to the plurality of bending strips, wherein the plurality bending strips are in a first configuration at a first temperature such that at least a portion of the strips of heat transfer material contact the first electrochemical cell and the second electrochemical cell, and wherein the plurality of bending strips are in a second configuration at a second temperature such that fewer strips of heat transfer material contact the first electrochemical cell and the second electrochemical cell than in the first configuration, the second temperature greater than the first temperature.

16 . The electrochemical cell module of claim 15 , wherein substantially no strips of heat transfer material contact the first electrochemical cell and the second electrochemical cell in the second configuration.

17 . The electrochemical cell module of claim 15 , wherein the plurality of bending strips are composed of at least one of tungsten, titanium, platinum, carbon steel, iron, steel, nickel, stainless steel, gold, copper, silver, brass, aluminum, or lead.

18 . The electrochemical cell module of claim 15 , wherein the heat transfer material is composed of at least one of copper, gold, silver, nickel, nickel titanium alloy, titanium, aluminum, steel, brass, iron, carbon steel, tungsten, platinum, or lead.

19 . An electrochemical cell module, comprising:
a first electrochemical cell; a second electrochemical cell; and a heat transfer fin disposed between the first electrochemical cell and the second electrochemical cell, the heat transfer fin including a plurality of bending strips and sheets of insulative material disposed on either side of the bending strips adjacent to the first electrochemical cell and the second electrochemical cell, wherein the plurality bending strips are in a first configuration at a first temperature such that the plurality of bending strips press the insulative material against exterior walls of the first electrochemical cell and the second electrochemical cell, and wherein the plurality of bending strips are in a second configuration at a second temperature such that at least one of the sheets of insulative material does not contact an adjacent surface of the first electrochemical cell or the second electrochemical cell, the second temperature greater than the first temperature.

20 . The electrochemical cell module of claim 19 , wherein the plurality of bending strips are composed of at least one of tungsten, titanium, platinum, carbon steel, iron, steel, nickel, stainless steel, gold, copper, silver, brass, aluminum, or lead.

Assignees

• 24M Tech Inc

Inventors

• Chen Junzheng
• Ota Naoki
• Lawrence Ryan Michael
• Disko Jeffry
• Hartzog Chad Alan

Classifications

• H01M50/1535

  adapted for specific cells, e.g. electrochemical cells operating at high temperature · CPC title

• H01M10/615 Primary

  Heating or keeping warm · CPC title

• H01M10/653

  characterised by electrically insulating or thermally conductive materials · CPC title

• H01M10/654

  located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes · CPC title

• H01M10/6554

  Rods or plates · CPC title