BATTERY MODULE AND METHODS OF ASSEMBLY
20230198057 · 2023-06-22
Inventors
Cpc classification
Y02P70/50
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
H01M10/655
ELECTRICITY
H01M50/264
ELECTRICITY
Y02E60/10
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
H01M50/213
ELECTRICITY
International classification
Abstract
A battery module and a method of assembling a battery module are provided. The method includes selectively applying a light-cure adhesive to recesses in a first side of a carrier layer and inserting battery cells into respective recesses. The method further includes exposing the first side of the carrier layer to light to at least partially cure the light-cure adhesive with the carrier layer in a first orientation, moving the carrier layer into a second orientation, and exposing a second opposite side of the carrier layer to light to fully cure the light-cure adhesive. The recesses may include a sidewall having crush points spaced apart along the sidewall and a bottom portion having an opening between a pair of crush points, where adhesive is not disposed between the pair of crush points.
Claims
1-20. (canceled)
21. An apparatus comprising: a carrier comprising a plurality of recesses on a first side, each of the plurality of recesses comprising a sidewall and a bottom; a light-cure adhesive; and wherein a first end of each of a plurality of battery cells is secured in a respective recess of the plurality of recesses by the light-cure adhesive.
22. The apparatus of claim 21, wherein the first end of each of the plurality of battery cells is secured to the sidewall and the bottom of the respective recess of the plurality of recesses by the light-cure adhesive.
23. The apparatus of claim 21, wherein the first end of each of the plurality of battery cells is secured to the respective recess of the plurality of recesses by a plurality of dollops of the light-cure adhesive.
24. The apparatus of claim 21, wherein the carrier comprises a second side opposite the first side, and wherein a first portion of the light-cure adhesive is cured by exposing the first side of the carrier to light and a remaining portion of the light-cure adhesive is cured by exposing the second side of the carrier to light after the first portion is cured.
25. The apparatus of claim 24, wherein the light-cure adhesive is a UV-cure adhesive and the carrier comprises a plastic configured to allow passage of UV light through the carrier to cure the remaining portion of the UV-cure adhesive when the second side of the carrier is exposed to the UV light.
26. The apparatus of claim 21, wherein the sidewall comprises a plurality of crush points spaced apart from each other along the sidewall and protruding from the sidewall, each of the plurality of crush points comprising a ridge protruding from the sidewall, and the bottom comprising an opening positioned between a pair of the plurality of crush points.
27. The apparatus of claim 21, further comprising a current collector assembly, wherein: the current collector assembly is coupled to a second side of the carrier, opposite to the first side, and a rim terminal of each of the plurality of battery cells is electrically coupled to the current collector assembly through an opening in the bottom of the respective recess of the plurality of recesses, and a center button terminal of each of the plurality of battery cells is electrically coupled to the current collector assembly through the opening or an additional opening in the bottom of the respective recess of the plurality of recesses.
28. A battery comprising: a carrier comprising a plurality of recesses on a first side of the carrier; an adhesive; and a plurality of battery cells, wherein a first end of each of the plurality of battery cells is secured in a respective recess of the plurality of recesses by a first portion of the adhesive cured by a first light curation and a second portion of the adhesive cured by a second light curation.
29. The battery of claim 28, wherein: the first curing step comprises exposing the first side of the carrier to light; and the second curing step comprises exposing a second side of the carrier, opposite the first side, to light.
30. The battery of claim 29, wherein the adhesive is a UV-cure adhesive and the carrier comprises a plastic configured to allow passage of UV light through the carrier to cure the remaining portion of the UV-cure adhesive when the second side of the carrier is exposed to the UV light.
31. A method of assembling a battery, the method comprising: applying a adhesive to each of a plurality of recesses in a first side of a carrier, each of the plurality of recesses comprising a sidewall and a bottom; inserting each of a plurality of battery cells into a respective recess of the plurality of recesses, wherein a first end of each of the plurality of battery cells makes contact with the adhesive in its respective recess; and exposing the adhesive to light to cure the adhesive.
32. The method of claim 31, wherein exposing the adhesive to light to cure the adhesive comprises: exposing the first side of the carrier, after inserting each of the plurality of battery cells, to light to cure a first portion of the adhesive; and exposing a second side of the carrier, opposite the first side, to light to cure a remaining portion of the adhesive after the first portion is cured.
33. The method of claim 32, wherein the carrier comprises a plastic configured to allow passage of the light through the carrier to cure the remaining portion of the adhesive when exposing the second side of the carrier to the light.
34. The method of claim 31, wherein applying the adhesive to each of the plurality of recesses comprises selectively applying the adhesive to the sidewall of each of the plurality of recesses.
35. The method of claim 31, wherein applying the adhesive to each of the plurality of recesses comprises selectively applying a plurality of dollops of the adhesive along the sidewall of each of the plurality of recesses.
36. The method of claim 31, wherein the first end of each of the plurality of battery cells is secured to the sidewall and the bottom of the respective recess of the plurality of recesses by the adhesive.
37. The method of claim 31, wherein the sidewall comprises a plurality of crush points spaced apart from each other along the sidewall and protruding from the sidewall such that the plurality of crush points is configured to at least partially hold a respective battery cell, of the plurality of battery cells, by interference fit by deforming when the battery cell is pressed into its respective recess, wherein each one of the plurality of crush points comprises a ridge protruding from the sidewall.
38. The method of claim 37, wherein applying the adhesive to each of the plurality of recesses comprises at least one of: selectively applying the adhesive to portions of the sidewall between all but one of adjacent ones of the plurality of crush points before inserting each of the plurality of battery cells into a respective recess of the plurality of recesses; and selectively applying the adhesive to portions of the first end of each of the plurality of battery cells before inserting each of the plurality of battery cells into a respective recess of the plurality of recesses, each of the portions of the first end of each of the plurality of battery cells corresponding to portions of the sidewall between all but one of adjacent ones of the plurality of crush points.
39. The method of claim 31, further comprising attaching, after exposing the adhesive to light, a current collector assembly to a second side of the carrier, opposite the first side, and electrically coupling portions of the current collector assembly to the plurality of battery cells.
40. The method of claim 31, further comprising attaching, after exposing the adhesive to light, a cooling surface to a second end of each of the plurality of battery cells, opposite the first end, using a thermal interface material.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above and other objects and advantages of the present disclosure will be apparent upon consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout, and in which:
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DESCRIPTION
[0034] In view of the foregoing, and in accordance with some embodiments of the present disclosure, it would be advantageous to provide and easily manufacture a battery module having only one carrier layer on one end of the packaged battery cells, without requiring complicated machinery to hold the battery cells in place during assembly. To do this, the battery module assembly method described herein may apply an ultraviolet light-cure adhesive to recesses on a first side of a carrier layer, insert a plurality of battery cells into recesses while the carrier layer is in a first orientation, and partially cure the light-cure adhesive by exposing the first side of the carrier layer to light while the carrier layer is still in the first orientation. By partially curing the light-cure adhesive before the carrier layer is moved from the first orientation, the position of each of the battery cells in the carrier layer may be maintained throughout the assembly process without, for example, the complicated machinery described above.
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[0036] As shown, the battery module 101 includes a carrier layer 115 having a first side 117 and a second side 119. The first side 117 may be adjacent to the plurality of battery cells 103 and may have a plurality of recesses that are each configured to receive the first end 105 of the plurality of battery cells 103. The second side 119 may be adjacent to the current collector assembly 113. In some embodiments of the present disclosure, the carrier layer 115 may be a clear plastic, such as clear polycarbonate, clear acrylic, clear PET (polyethylene terephthalate), or any other appropriate translucent material. A clear plastic carrier layer may be used to enable the usage of a light-cure adhesive that can be exposed to light through the clear plastic carrier layer. For example, as described in greater detail with reference to
[0037] The battery module 101 may further include a thermal transfer plate, e.g., a cooling plate 121, as shown. In some embodiments of the present disclosure, the thermal transfer plate may be used to selectively heat or cool the battery module 101. The cooling plate 121 may have two cooling fluid ports. Only one cooling fluid port 123 is shown in
[0038] In some embodiments of the present disclosure, the components described above in relation to
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[0041] When a respective one of the plurality of battery cells 103 is pressed into the recess 201, the crush points 304 deform so that the battery cell 103 is held at least partially in the recess 201 by interference fit. In some embodiments of the present disclosure, however, the interference fit is not sufficient to maintain the battery cell 103 in the desired position during the remainder of the assembly process, let alone during operation (e.g., in an electric vehicle). For example, as shown in greater detail in
[0042] It is advantageous to apply the UV-cure adhesive 308 such that excess adhesive does not coat portions of the top of each of the plurality of battery cells 103 where electrical connections are made to each of the plurality of battery cells 103 (i.e., the ends of the battery cells 103 inserted into the recesses 201) when the battery cells 103 are pressed into their respective recesses 201. For example, in some embodiments of the present disclosure, as described above, because no adhesive of the UV-cure adhesive 308 is applied between the crush points 304a and 304b (or the corresponding portion of the first ends 105 of the plurality of battery cells 103), and because the crush points 304a and 304b prevent the UV-cure adhesive 308 from flowing into the area of the recess 201 between the crush points 304a and 304b, excess adhesive does not coat the portion of the top of the plurality of battery cells 103 exposed through the opening in the bottom portion 306 between the crush points 304a and 304b, thereby enabling a clean electrical connection to be made to this portion of each of the plurality of battery cells 103. In some embodiments of the present disclosure, some excess adhesive of the UV-cure adhesive 308 may be squeezed from between the sidewall 302 and each of the plurality of battery cells 103 to coat a portion of the top of each of the plurality of battery cells 103 and the bottom portion 306 between crush points 304a and 304d, between crush points 304d and 304c, and between 304c and 304b, and may improve the bond between each of the plurality of battery cells 103 and the corresponding recess 201. However, by carefully controlling the amount of the UV-cure adhesive 308 that is applied, it can be ensured no excess adhesive of the UV-cure adhesive 308 will be squeezed from between the sidewall 302 and each of the plurality of battery cells 103 to coat the portion of the top of each of the plurality of battery cells 103 exposed through the center hole in the bottom portion 306 where an electrical connection is made to each of the plurality of battery cells.
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[0044] Moving the battery module assembly from the first orientation to the second orientation (or performing other assembly steps), however, may cause the position of some of the plurality of battery cells 103 to shift. Thus, in some embodiments of the present disclosure, in order to maintain the positions of the plurality of battery cells 103 while the battery module assembly is moved from the first orientation to the second orientation (or while performing other assembly steps), the first side 117 of the carrier layer 115 is exposed to UV light (e.g., from UV light 401) while the battery module assembly is still in the first orientation so as to partially cure the UV-cure adhesive 308. For example, as shown, the battery module assembly may be passed under the UV light 401 so that the portion of the UV-cure adhesive 308 exposed to the UV light is cured (partial curing of the UV-cure adhesive 308 is more clearly shown in
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[0052] At step 1102, a carrier layer is provided in a first orientation. The carrier layer may be the carrier layer 115 in the first orientation, as described above in
[0053] At step 1104, a UV-cure adhesive is provided and selectively applied to recesses in a first side of the carrier layer. The UV-cure adhesive may be the UV-cure adhesive 308 applied to the recesses 201 in the first side 117 of the carrier layer 115, as described above in
[0054] At step 1106, a plurality of battery cells is provided and inserted into the recesses in the carrier layer, while the carrier layer is in the first orientation. The plurality of battery cells may be the plurality of battery cells 103 inserted into the recesses 201 in the carrier layer 115, while the carrier layer is in the first orientation, as described above in
[0055] At step 1108, after inserting the plurality of battery cells, the first side of the carrier layer is exposed to UV light to partially cure the UV-cure adhesive, while the carrier layer is in the first orientation. The UV light may be incident to the first side 117 of the carrier layer 115 from the UV light 401, as described above in
[0056] At step 1110, after partially curing the UV-cure adhesive, a plurality of barrier layers is provided and inserted between groups of the plurality of battery cells. The plurality of barrier layers may be the plurality of barrier layers (601a, 601b, 601c, 601d, 601e) respectively inserted between groups (603a, 603b, 603c, 603d, 603e, and 603f) of the plurality of battery cells 103, as described above in
[0057] At step 1112, after inserting the plurality of barrier layers, sidewalls are provided and attached to the carrier layer. The sidewalls may be the sidewalls 701 attached to the sides of the carrier layer 115, as described above in
[0058] At step 1114, after partially curing the UV-cure adhesive, the carrier layer is moved into a second orientation and a second side of the carrier layer, opposite to the first side, is exposed to UV light to fully cure the UV-cure adhesive. The second side of the carrier layer may be the second side 119 of the carrier layer 115, and the UV light may be incident to the second side 119 (e.g., from the UV light 801), while the carrier layer 115 is in the second orientation, as described above in
[0059] At step 1116, after fully curing the UV-cure adhesive, a current collector assembly is provided and installed on the second side of the carrier layer. The current collector assembly may be the current collector assembly 113 installed on the second side 119 of the carrier layer 115, as described above in
[0060] At step 1118, after fully curing the UV-cure adhesive, a cooling plate is provided and attached to exposed ends of the plurality of battery cells using a thermal interface material. The cooling plate may be the cooling plate 121 and may be attached to the second ends 107 of the plurality of battery cells 103 using the thermal interface material 125, as described above in FIG.
[0061] It will be understood that while process 1100 was described in the context of manufacturing a battery module, process 1100 may be used for manufacturing any module that requires a reorientation before a UV-cure adhesive can be fully cured to secure components in a carrier. It will also be understood that some of the steps of process 1100 may be omitted or performed in a different order than as described above in
[0062] The foregoing is merely illustrative of the principles of this disclosure and various modifications may be made by those skilled in the art without departing from the scope of this disclosure. The above-described embodiments are presented for purposes of illustration and not of limitation. The present disclosure also can take many forms other than those explicitly described herein. Accordingly, it is emphasized that this disclosure is not limited to the explicitly disclosed methods, systems, and apparatuses, but is intended to include variations to and modifications thereof, which are within the spirit of the following claims.