Isostatic press devices and processes for cylindrical solid-state batteries
Various arrangements for compressing a cylindrical battery cell are presented herein. The cylindrical battery cell may be wrapped in a buffer material. The buffer material may then be compressed using a compression mechanism. The buffer material may uniformly distribute pressure applied to the buffer material to a curved sidewall of the cylindrical battery cell. The cylindrical battery cell may be heated while the buffer material is being compressed using the compression mechanism.
1. A cylindrical battery press system, comprising:
a compression mechanism that, when engaged, causes a first edge of the compression mechanism to be moved toward a second edge of the compression mechanism, thereby decreasing a volume of a first cylindrical void within the compression mechanism;
a semi-rigid buffer material having a halo-shaped cross-section, the semi-rigid buffer material being installed within the first cylindrical void of the compression mechanism, wherein the semi-rigid buffer material defines a second cylindrical void within which a battery cell is configured to be installed; and
a heating element that wraps around at least a portion of an outer perimeter of the semi-rigid buffer material and is configured to output heat while the compression mechanism is engaged.
2. The cylindrical battery press system of claim 1 , wherein the compression mechanism comprises an extension to be actuated by a user, wherein the extension causes force to be applied to the compression mechanism to move the first edge of the compression mechanism toward the second edge of the compression mechanism.
3. The cylindrical battery press system of claim 1 , further comprising:
a support structure, wherein the second edge of the compression mechanism is anchored to the support structure such that the second edge does not move relative to the support structure when the compression mechanism is engaged.
4. The cylindrical battery press system of claim 1 , further comprising:
a temperature sensor configured to be inserted in the second cylindrical void between the battery cell and the semi-rigid buffer material.
5. The cylindrical battery press system of claim 1 , wherein the semi-rigid buffer material is heat-resistant rubber.
6. The cylindrical battery press system of claim 1 , wherein the semi-rigid buffer material uniformly redistributes pressure applied by the compression mechanism to the battery cell when the battery cell is installed within the second cylindrical void.
7. The cylindrical battery press system of claim 1 , further comprising a jelly-roll style pouch battery, wherein the jelly-roll style pouch battery is installed with the second cylindrical void.
8. The cylindrical battery press system of claim 1 , wherein the compression mechanism applies between 0.1 and 10 megapascals (MPa) of pressure to the semi-rigid buffer material.
9. The cylindrical battery press system of claim 1 , wherein the heating element heats to between 60° C. and 250° C.
10. The cylindrical battery press system of claim 1 , wherein the compression mechanism comprises a motor that causes force to be applied to the compression mechanism to move the first edge of the compression mechanism toward the second edge of the compression mechanism.
11. A method for compressing a cylindrical battery cell, the method comprising:
wrapping the cylindrical battery cell in a buffer material, wherein the buffer material has a halo-shaped cross-section;
compressing the buffer material using a compression mechanism, wherein:
a first edge of the compression mechanism is moved toward a second edge of the compression mechanism, thereby decreasing a volume of a first cylindrical void within the compression mechanism; and
the buffer material uniformly distributes pressure applied to the buffer material to a curved sidewall of the cylindrical battery cell;
heating the cylindrical battery cell, using a heating element, while the buffer material is being compressed using the compression mechanism;
disengaging the compression mechanism; and
after disengaging the compression mechanism, removing the cylindrical battery cell from the buffer material, whereby the cylindrical battery cell is now a semi-activated cylindrical battery cell.
12. The method for compressing the cylindrical battery cell of claim 11 , wherein compressing the buffer material using the compression mechanism comprises an extension of the compression mechanism being actuated by a user to apply force.
13. The method for compressing the cylindrical battery cell of claim 11 , further comprising:
installing a temperature sensor between the buffer material and the cylindrical battery cell.
14. The method for compressing the cylindrical battery cell of claim 13 , further comprising:
controlling heating of the cylindrical battery cell based on temperature measurements made using the temperature sensor.
15. The method for compressing the cylindrical battery cell of claim 14 , wherein the heating element is located between the compression mechanism and the buffer material.
16. The method for compressing the cylindrical battery cell of claim 11 , wherein the cylindrical battery cell is a jelly-roll style solid-state battery cell.
17. The method for compressing the cylindrical battery cell of claim 11 , wherein compressing the buffer material comprises a pressure of between 0.1-10 MPa being applied to the buffer material.
18. The method for compressing the cylindrical battery cell of claim 11 , wherein heating the cylindrical battery cell comprises the heating element heating to between 60° C. and 250° C.
19. A cylindrical battery press system, comprising:
a jelly-roll style solid-state cylindrical battery cell;
a compression mechanism that, when engaged, causes a first edge of the compression mechanism to be moved toward a second edge of the compression mechanism, thereby decreasing a volume of a first cylindrical void within the compression mechanism;
a semi-rigid buffer material having a halo-shaped cross-section, the semi-rigid buffer material being installed within the first cylindrical void of the compression mechanism, wherein the semi-rigid buffer material defines a second cylindrical void within which the jelly-roll style solid-state cylindrical battery cell is installed;
a heating element that wraps around at least a portion of an outer perimeter of the semi-rigid buffer material and is configured to output heat while the compression mechanism is engaged; and
a support structure, wherein the second edge of the compression mechanism is anchored to the support structure such that the second edge does not move relative to the support structure when the compression mechanism is engaged.
20. The cylindrical battery press system of claim 1 , wherein the compression mechanism comprises an extension to be actuated by a user, wherein the extension causes force to be applied to the compression mechanism to move the first edge of the compression mechanism toward the second edge of the compression mechanism.