Battery module including nodal cell compression and heat rejection
A battery module having a battery cell assembly that is free from module banding is provided. The assembly includes an expandable battery cell having a first and second face, and the first face moves away from the second face as a result of the battery cell expanding. The assembly further includes a first and second cell frame. The first cell frame includes an outer peripheral extending toward the second cell frame. The second cell frame includes an outer peripheral extending away from the second face of the battery cell. Additionally, the outer peripheral of the second cell frame and the battery cell are disposed within the outer peripheral of the first cell frame with the first face facing the first frame and the second face facing the second frame.
1 . A battery cell assembly, comprising:
a battery cell capable of expanding and having a first face and a second face opposite the first face, with the first face moving away from the second face as a result of the battery cell expanding;
a first cell frame; and
a second cell frame, wherein the first cell frame includes an outer peripheral extending toward the second cell frame, the second cell frame includes an outer peripheral extending away from the second face of the battery cell, and the outer peripheral of the second cell frame and the battery cell are disposed within the outer peripheral of the first cell frame with the first face facing the first cell frame and the second face facing the second cell frame;
wherein:
a thermally conductive pad is disposed within the outer peripheral of the first cell frame; and
the thermally conductive pad is disposed between the first face of the battery cell and the first cell frame.
2 . The battery cell assembly of claim 1 , wherein the first cell frame is coupled to the second cell frame along an overlap of the outer peripheral of the first cell frame and the outer peripheral of the second cell frame.
3 . The battery cell assembly of claim 2 , wherein a uniform pressure is applied along the first and second faces of the battery cell.
4 . The battery cell assembly of claim 1 , wherein the first cell frame is welded to the second cell frame along an overlap of the outer peripheral of the first cell frame and the outer peripheral of the second cell frame.
5 . The battery cell assembly of claim 1 , further comprising:
a growth plate disposed between the battery cell and the thermally conductive pad.
6 . The battery cell assembly of claim 1 , wherein the thermally conductive pad is made of one or more of ceramic filled acrylic, graphite composites, and boron nitride.
7 . The battery cell assembly of claim 1 , wherein the first cell frame and the second cell frame are formed of a thermally conductive metallic material.
8 . The battery cell assembly of claim 1 , wherein the first cell frame includes fins along a portion of an outer peripheral of the first cell frame extending away from the outer peripheral of the first cell frame.
9 . The battery cell assembly of claim 1 , wherein the battery cell is a lithium-ion battery cell.
10 . A battery cell assembly, comprising:
a battery cell capable of expanding and having a first face and a second face opposite the first face, with the first face moving away from the second face as a result of the battery cell expanding;
a first cell frame;
a thermally non-conductive pad; and
a second cell frame, wherein the first cell frame includes an outer peripheral extending toward the second cell frame, the second cell frame includes an outer peripheral extending away from the second face of the battery cell, and the outer peripheral of the second cell frame, and the battery cell and the thermally non-conductive pad are disposed within the outer peripheral of the first cell frame; wherein:
the thermally non-conductive pad is disposed directly between the first face of the battery cell and the first cell frame, such that a first side of the thermally non-conductive pad is in contact with the first face of the battery cell and a second side of the thermally non-conductive pad is in contact with the first cell frame.
11 . The battery cell assembly of claim 10 , wherein the thermally non-conductive cell is made of one or both of silicone sponge rubber and silicone foam.
12 . The battery cell of claim 10 , further comprising:
a growth plate disposed between the thermally non-conductive pad and the first face of the battery cell such that a first side of the growth plate is in contact with the battery cell and a second side of the growth plate is in contact with the thermally non-conductive pad.
13 . The battery cell assembly of claim 10 , wherein the first cell frame is coupled to the second cell frame along an overlap of the outer peripheral of the first cell frame and the outer peripheral of the second cell frame.
14 . The battery cell assembly of claim 13 , wherein a uniform pressure is applied along the first and second faces of the battery cell.
15 . The battery cell assembly of claim 10 , wherein the first cell frame is welded to the second cell frame along an overlap of the outer peripheral of the first cell frame and the outer peripheral of the second cell frame.
16 . A battery module, comprising:
a first battery cell capable of expanding and having a first face and a second face opposite the first face, with the first face moving away from the second face as a result of the first battery cell expanding;
a first cell frame contacting the first face of the battery cell; and
a second cell frame, wherein the first cell frame includes an outer peripheral extending toward the second cell frame, the second cell frame includes an outer peripheral extending away from the second face of the battery cell, and the battery cell is disposed within the outer peripheral of the first cell frame with the first face facing the first cell frame and the second face facing the second cell frame;
a second battery cell capable of expanding and having a first face and a second face opposite the first face, with the first face moving away from the second face as a result of the second battery cell expanding, wherein the outer peripheral of the first cell frame extends away from the second face of the battery cell such that at least a portion of the second battery cell is disposed within the outer peripheral of the first cell frame;
a third cell frame, wherein the second cell frame include an outer peripheral extending toward the third cell frame, and the second battery cell is disposed within the outer peripheral of the second cell frame with the first face facing the second cell frame and the second face facing the third cell frame.
17 . The battery module of claim 16 , wherein:
the first cell frame includes an outer peripheral extending towards the second cell frame, the second cell frame includes an outer peripheral extending towards the third cell frame, and the third cell frame includes an outer peripheral extending toward the second cell frame:
a portion of the outer peripheral of the second cell frame and a portion of the second battery cell are disposed within the outer peripheral of the third cell frame;
a portion of the outer peripheral of the third cell frame and the first battery cell is disposed within the first cell frame;
the first cell frame, the second cell frame, and the third cell frame are coupled to each other along an overlap of the outer peripheral of the first cell frame, the outer peripheral of the second cell frame, and the outer peripheral of the third cell frame; and
a uniform pressure is applied along the first and second faces of the first battery cell, and along the first and second faces of the second battery cell.