Battery module and method for manufacturing same

Abstract

A battery module according to one embodiment of the present invention comprises: a battery cell stack in which a plurality of battery cells are stacked side by side and adjacent to each other; a top frame covering an upper surface of the battery cell stack; a bus bar frame combined with the top frame and covering a side surface of the battery cell stack; and a module frame accommodating a battery cell assembly formed by assembling the battery cell stack, the top frame, and the bus bar frame, and having a shape of a quadrilateral tube, in which the top frame includes a first protrusion protruding from one end of the top frame toward an upper surface of the module frame, and a second protrusion protruding from the other end of the top frame toward a lower surface of the module frame. And the module frame includes a second protrusion protruding toward the top frame at a position corresponding to the other end of the top frame at the opposite side of the one end inside the upper surface of the module frame.

Description

Technical Field

[0001] Cross - Reference to Related Applications

[0002] This application claims the priority and benefit of Korean Patent Application No. 10-2022-0178455, filed with the Korean Intellectual Property Office on December 19, 2022, the entire contents of which are incorporated herein by reference.

[0003] The present invention relates to a battery module and a method of manufacturing the same, and more particularly, to a battery module and a method of manufacturing the same that can stabilize the position and size of components in the battery module and prevent excessive resin injection into the battery module. Background Art

[0004] With the development of technology and the growing demand for mobile devices, the demand for secondary batteries as an energy source has increased rapidly. Therefore, research is being conducted on secondary batteries that can meet various needs.

[0005] Secondary batteries have received high attention not only as an energy source for power drive devices such as electric bicycles, electric vehicles, and hybrid electric vehicles, but also as an energy source for mobile devices such as mobile phones, digital cameras, and laptop computers.

[0006] Small devices such as mobile phones and cameras use small battery packs in which a single battery cell is encapsulated. However, medium or large-sized devices such as laptop computers and electric vehicles use medium or large-sized battery packs in which a battery pack composed of two or more battery cells connected in parallel and / or in series is encapsulated. Therefore, the number of battery cells included in the battery pack can be set in various ways according to the required output voltage or charge / discharge capacity.

[0007] It should be noted that when configuring a battery pack by connecting a plurality of battery cells in series / parallel, it is a conventional method to first configure a battery module composed of at least one battery cell and then add other constituent elements using at least one battery module to configure the battery pack.

[0008] In the case of such a battery module, as the required battery capacity increases, the importance of a technology capable of effectively cooling the heat generated from the battery cells gradually increases. To this end, a structure capable of improving the thermal conductivity by applying a heat-dissipating resin to the housing has been introduced into the battery module.

[0009] Figure 1 It is a view showing a conventional battery module. Figure 2 It is a cross-sectional view taken along line A-A' after rotating 180°, Figure 1 showing a configuration in which the end plate is omitted. Figure 2 showing a configuration in which the end plate is omitted.

[0010] In the battery module 10 of the prior art, the binding frames of the battery cell stack 11 and the top frame 50 and the bus bar frame 30 respectively combined with the upper surface and one side of the battery cell stack 11 are accommodated inside the module frame 20, and the heat-conductive resin for heat dissipation is injected in a manner with the lower surface facing upward. That is, as Figure 2 shown, in a state where the upper surface 21 of the module frame 20 is located at the lower part and the lower surface 22 faces upward, the heat-conductive resin is injected through at least one injection hole (H) formed in the lower surface 22 and cured to form a heat-conductive resin layer 80.

[0011] However, during this process, in order to inject the heat-conductive resin into the module frame 20, a predetermined size of the gap is required to ensure the injection space, which may cause the position of the battery cell stack 11 to be unstable due to internal flow until the heat-conductive resin layer is formed after the battery cell stack 11 is inserted into the module frame 20, and may also cause the positions of the components combined with the battery cell stack 11 to be unstable. In addition, the deviation of the internal space may cause the injection amount of the heat-conductive resin to change, resulting in an excessive injection beyond the requirement, which increases the cost and increases the weight of the battery module. Summary of the Invention

[0012] Technical Problem

[0013] The present invention has been made to solve the above problems, and an object of the present invention is to provide a battery module and a manufacturing method thereof that can improve the position stability of the battery cell stack inside the module frame during the manufacturing of the battery module and reduce the cost of the manufacturing process and prevent unnecessary weight increase by injecting an appropriate amount of heat-conductive resin into the battery module.

[0014] However, the problems to be solved by the exemplary embodiments of the present invention are not limited to the above problems, and various expansions can be made within the scope of the technical spirit included in the present invention.

[0015] Technical Solution

[0016] A battery module according to an exemplary embodiment of the present invention includes: a battery cell stack in which a plurality of battery cells are stacked side by side and adjacent to each other; a top frame covering the upper surface of the battery cell stack; a bus bar frame coupled to the top frame and covering the side surface of the battery cell stack; and a module frame which is quadrilateral tubular and configured to accommodate a battery cell assembly formed by combining the battery cell stack, the top frame, and the bus bar frame, wherein the top frame includes a first protrusion protruding toward the upper surface of the module frame at one end of the top frame, and wherein the module frame includes a second protrusion protruding toward the top frame at a position corresponding to the other end of the top frame which is on the opposite side of the one end of the top frame on the inner side of the upper surface of the module frame.

[0017] The first protrusion and the second protrusion may have the same protruding height.

[0018] Each of the first protrusion and the second protrusion may have an inclined shape such that the height of the protrusion decreases in the direction toward the inside of the module frame.

[0019] The battery module may further include a thermally conductive resin layer disposed between the lower surface of the module frame and the battery cell assembly.

[0020] The bus bar frame may include an extension protruding and extending along the lower surface of the battery cell stack, and the thermally conductive resin layer may be located inside the extension.

[0021] One end and the other end may be the ends on both sides in the length direction of the top frame, and the first protrusion and the second protrusion may be respectively arranged in two or more along the width direction perpendicular to the length direction.

[0022] A method for manufacturing a battery module according to another exemplary embodiment of the present invention includes: forming a battery cell assembly by combining a battery cell stack in which a plurality of battery cells are stacked side by side and adjacent to each other, a top frame covering the upper surface of the battery cell stack, and a bus bar frame coupled to the top frame and covering one side of the battery cell stack; and inserting the battery cell assembly into a quadrilateral tubular module frame, wherein the top frame includes a first protrusion protruding toward the upper surface of the module frame at one end of the top frame, wherein the module frame includes a second protrusion protruding toward the top frame at a position corresponding to the other end of the top frame which is on the opposite side of the one end of the top frame on the inner side of the upper surface of the module frame, and wherein the step of inserting the battery cell assembly is performed in a state where the upper surfaces of the top frame and the module frame are located at the lower part with respect to the direction of gravity, and the step of inserting the battery cell assembly includes inserting the other end of the top frame toward the second protrusion.

[0023] The first protrusion and the second protrusion may have the same protrusion height.

[0024] The method may further include: after inserting the battery cell assembly, injecting and curing a thermally conductive resin between the battery cell assembly and the lower surface of the module frame, wherein the battery cell assembly may be supported by the first protrusion and the second protrusion when injecting and curing the thermally conductive resin.

[0025] Each of the first protrusion and the second protrusion may have an inclined shape such that the height of the protrusion decreases in the direction toward the inside of the module frame, and wherein, in the step of inserting the battery cell assembly, the other end of the top frame may be inserted along the inclined shape of the second protrusion.

[0026] A battery pack according to another exemplary embodiment of the present invention may include at least one of the above-described battery modules.

[0027] Advantageous Effects

[0028] According to an exemplary embodiment, in the manufacturing process of a battery module, a battery module and a manufacturing method thereof can be provided that can improve the positional stability of a battery cell stack inside the module frame during the manufacturing of the battery module and reduce the cost of the manufacturing process and prevent unnecessary weight increase by injecting an appropriate amount of thermally conductive resin into the battery module.

[0029] The effects of the present invention are not limited to the above effects, and other effects not described will be clearly understood by those skilled in the art from the claims. Brief Description of the Drawings

[0030] Figure 1 is a view showing a battery module of the prior art.

[0031] Figure 2 is a cross-sectional view taken along line A-A' of Figure 1 after rotating 180°, Figure 2 showing a configuration with the end plates omitted.

[0032] Figure 3 is a view showing a battery module according to an exemplary embodiment of the present invention.

[0033] Figure 4 is Figure 3 an exploded view of the battery module.

[0034] Figure 5 is a cross-sectional view taken along line B-B' of Figure 3 after rotating 180°, Figure 5 showing a configuration with the end plates omitted.

[0035] Figure 6 FIG. is a diagram schematically showing a process of inserting a battery cell assembly into a module frame in a method of manufacturing a battery module according to another exemplary embodiment of the present invention.

[0036] Figure 7 is schematically showing Figure 6 FIG. is a diagram showing a process of injecting a thermally conductive resin into the battery module to complete the battery module after DETAILED DESCRIPTION

[0037] In the following detailed description, only specific exemplary embodiments of the present invention are shown and described by way of illustration. The present invention can be implemented in various ways and is not limited to the following exemplary embodiments.

[0038] The accompanying drawings and the description are considered to be illustrative in nature and not restrictive. Throughout the specification, the same reference numerals denote the same elements.

[0039] In addition, for the sake of understanding and easy description, the dimensions and thicknesses of the respective configurations shown in the drawings are arbitrarily shown, but the present invention is not limited thereto. In the drawings, the thicknesses of layers, films, planes, regions, etc. are enlarged for clarity. In the drawings, the thicknesses of some layers and regions are enlarged for understanding and easy description.

[0040] Furthermore, it will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” another element, it can be directly on the other element or there can also be an intermediate element. In contrast, when an element is referred to as being “directly on” another element, there is no intermediate element. In addition, when an element is referred to as being “on” a reference portion, the element is above or below the reference portion, and this does not necessarily mean that the element is “above” or “on” in the direction opposite to gravity.

[0041] In addition, unless there is a clear contrary statement, the words “comprising” and variations such as “comprises” or “including” will be understood to imply the inclusion of the stated elements, but not the exclusion of any other elements.

[0042] Furthermore, throughout the specification, when referred to as “on a plane”, this means that the target portion is observed from above at this time, and when referred to as “in a cross-section”, this means that the cross-section obtained by vertically cutting the target portion is observed from the side at this time.

[0043] Hereinafter, a battery module according to an exemplary embodiment of the present disclosure will be described with reference to Figures 3 to 5 FIG. is a diagram showing a battery module according to an exemplary embodiment of the present invention,

[0044] Figure 3 is a diagram showing a battery module according to an exemplary embodiment of the present invention, Figure 4 is Figure 3exploded view of a battery module, and Figure 5 is a cross-sectional view taken along line B-B’ after being rotated 180°, Figure 3 showing a configuration in which the end plates are omitted. Figure 5 Referring to

[0045] Referring to Figures 3 to 5 , a battery module 100 according to an exemplary embodiment of the present invention includes: a battery cell stack 110 in which battery cells are stacked; a top frame 500 covering the upper surface of the battery cell stack 110; a bus bar frame 300 coupled to the top frame 500 and covering one side of the battery cell stack 110; and a module frame 200 accommodating a battery cell assembly 400 formed by combining the battery cell stack 110, the top frame 500, and the bus bar frame 300.

[0046] The battery cell stack 110 is an assembly of secondary batteries including a plurality of battery cells. The battery cell stack 110 may include a plurality of battery cells, and each battery cell includes electrode leads (not shown). The battery cells may be plate-shaped pouch-type battery cells, but are not limited thereto. The electrode leads are positive electrode leads or negative electrode leads, and the ends of the electrode leads of each battery cell may be bent in one direction, resulting in contact with the ends of the electrode leads of another adjacent battery cell. The two electrode leads in contact with each other may be fixed to each other by welding or the like, which enables electrical connection between the battery cells within the battery cell stack 110.

[0047] A plurality of battery cells are vertically stacked such that the electrode leads are aligned in one direction (+X direction and -X direction in the drawing), thereby forming the battery cell stack 110. The electrode leads aligned in one direction may be electrically connected to bus bars fixed to the bus bar frame 300 arranged to cover the battery cell stack 110. That is, the bus bar frame 300 includes lead slots made of an insulating material, and the electrode leads pulled out from the battery cell stack 110 may pass through the lead slots, and the bus bars may electrically connect the electrode leads 112 of the battery cell stack 110.

[0048] Various other electronic components may be attached to the bus bar frame 300. For example, an internal circuit board (ICB) and a battery management system (BMS) may be provided, and electronic components such as the ICB and BMS may be electrically connected to the plurality of battery cells.

[0049] The top frame 500 is located at the top of the battery cell stack 110, and the bus bar frame 300 is rotatably coupled to both sides of the top frame. In this case, bus bars are mounted on the bus bar frame 300, and a flexible printed circuit board (FPCB) can be disposed at the upper end along the longitudinal direction of the top frame 500. The flexible printed circuit board is electrically connected to the bus bars, allowing overvoltage, overcurrent, etc. of the battery cells to be sensed. In addition, a connector is connected to one end of the board, enabling signals related to voltage sensing and temperature sensing to be transmitted and received based on a controller provided outside the battery module 100.

[0050] The bus bar frame 300 includes an extension portion 310 that extends and protrudes from the lower end along the lower surface of the battery cell stack 110. Thus, Figure 4 the bus bar frame 300 in can have an L-shaped side shape. The extension portion 310 can protect the corners of the battery cell stack 110 having relatively low stiffness, thereby preventing the corners of the battery cell stack 110 from being damaged.

[0051] The top frame 500 is disposed at the top of the battery cell stack 110, and the bus bar frame 300 rotatably coupled to the top frame 500 rotates to be coupled to the side of the battery cell stack 110 having electrode leads, thereby forming a battery cell assembly 400. The battery cell assembly 400 is accommodated in a quadrilateral tubular module frame 200, which has at least one open opening that is open in the longitudinal direction of the battery cell stack 110 and includes four plates that surround at least four sides of the battery cell stack 110. That is, the module frame 200 can include: a lower surface 202, an upper surface 201 facing the lower surface 202, and two side surfaces 203 connecting the upper surface 201 and the lower surface 202. It should be noted that in a state where the battery cell assembly 400 is accommodated in the module frame 200, the bus bar frame 300 is exposed through the opening of the module frame 200, and the opening can be covered by an end plate 600.

[0052] A thermally conductive resin layer 800 is located between the lower surface of the battery cell stack 110 and the lower surface of the module frame 200. The thermally conductive resin layer 800 is made of a thermally conductive material to dissipate heat generated from the battery cell stack 110 to the outside, and can be made of, for example, a thermal resin. Examples of such a thermal resin can include silicone resin, polyurethane, and epoxy resin. In addition, the thermally conductive resin layer 800 can be used to transfer the heat generated in this way to the bottom of the battery module 100 and to fix the battery cell stack 110 within the battery module 100. The thermally conductive resin layer 800 can be formed by curing a thermally conductive resin that is injected in a liquid state through holes H formed in the lower surface of the module frame 200. As Figure 5As shown, the heat-conductive resin layer 800 obtained in this way can be disposed between the battery cell assembly 400 and the lower surface 202 of the module frame 200 inside the extension 310 of the bus bar frame 300.

[0053] The expansion control pad 700 can be provided between one side of the battery cell stack 110 and the module frame 200. When the battery cells expand, the expansion control pad 700 can control the expansion of the battery cells by being compressed and acting as a buffer, thereby preventing damage to the battery cells and the module frame 200 due to the expansion of the battery cells. To this end, the expansion control pad 700 can include a material containing a soft elastic material such as polyurethane (PU) or ethylene propylene diene monomer (EPDM). Since this material has excellent vibration absorption and compression resistance, a battery module 100 with excellent dimensional stability can be provided even when battery cell expansion occurs in multiple battery cells.

[0054] It should be noted that the top frame 500 includes a first protrusion 510 protruding from one end of the top frame 500 toward the module frame 200. In this case, one end refers to one end on one side in the length direction of the top frame 500 (i.e., the direction parallel to the X-axis in the figure), for example, the end on the +X side in the drawing. The first protrusion 510 is formed to protrude toward the upper surface 201 of the module frame 200. That is, in the drawing, the first protrusion protrudes toward the top in the Z-axis direction. In addition, two or more first protrusions 510 can be provided. In this case, the first protrusions can be arranged to be spaced apart from each other in the width direction perpendicular to the length direction of the top frame 500 (i.e., the direction parallel to the Y-axis in the figure). The first protrusion 510 can have an inclined shape with a decreasing height toward the inside at the end facing the inside of the module frame 200. Therefore, as will be described below, damage to components can be prevented when the battery cell assembly 400 is inserted.

[0055] The module frame 200 includes a second protrusion 210 inside the upper surface 201. The second protrusion 210 is formed at a position corresponding to the other end, and the other end is located on the opposite side of the one end where the first protrusion 510 is formed. That is, the second protrusion 210 is arranged at a position corresponding to the end on the -X side in the drawing and protrudes from the inside of the upper surface 201 toward the inside of the module frame 200. The second protrusion 210 is formed to have the same height as the first protrusion 510. In addition, the second protrusion 210 can have an inclined shape with a decreasing height toward the inside at the end facing the inside of the module frame 200.

[0056] In this case, when manufacturing the battery module 100, the first protrusion 510 and the second protrusion 210 can be set within a range that can ensure a space for forming the heat-conductive resin layer 800 inside the module frame 200 while ensuring a space for accommodating components provided for the battery cell assembly 400. That is, the battery cell assembly 400 occupies most of the space inside the battery module 100, but needs to be stably arranged at the designed position, especially the designed position in the Z-axis direction, to allow for the provision of other components and the heat-conductive resin layer 800. In the prior art, there is a problem of position change of the battery cell assembly during the manufacturing process when the top and bottom are reversed. However, according to the present exemplary embodiment, since the position of the battery cell assembly 400 can be adjusted by the first protrusion and the second protrusion, the position instability of the battery cell assembly 400 can be prevented. Additionally, as will be described below, the injection amount of the heat-conductive resin injected to form the heat-conductive resin layer 800 is made uniform, and only an appropriate amount of the heat-conductive resin is allowed to be injected, thereby preventing an increase in weight and cost due to excessive injection.

[0057] Next, a method of manufacturing a battery module according to another exemplary embodiment of the present invention will be described with reference to Figure 6 and Figure 7 FIGs.

[0058] Figure 6 FIG. Figure 7 is a diagram schematically showing a process of inserting a battery cell assembly into a module frame in a method of manufacturing a battery module according to another exemplary embodiment of the present invention, and Figure 6 FIG.

[0059] is a diagram schematically showing a process of injecting a heat-conductive resin into the battery module to complete the battery module after Figure 6 As shown in FIG.

[0060] The battery cell assembly 400 is inserted into the module frame 200 from the other end of the top frame 500 (i.e., the end that does not form the first protrusion 510). At this time, the battery cell assembly 400 can be inserted from above in the direction of the end of the module frame 200 that forms the second protrusion 210. During the insertion process, a gap d corresponding to the heights of the first protrusion 510 and the second protrusion 210 can be maintained between the upper surface 201 and the battery cell assembly 400. In addition, the battery cell assembly 400 can be inserted along the inclined shape of the second protrusion 210 and placed on the second protrusion 210. During this process, inserting the battery cell assembly 400 along the inclined shape can prevent damage caused by interference between components during the insertion process. In addition, since the first protrusion 510 formed at one end of the battery cell assembly 400 also has an inclined shape with a height decreasing towards the inside, the end of the module frame 200 can be joined along the corresponding inclined shape during insertion, which can prevent damage to the module frame 200 and the top frame 500 during the insertion process.

[0061] By inserting the battery cell assembly 400 in this way, the battery cell assembly 400 is placed inside the module frame 200 while maintaining a gap corresponding to the first protrusion 510 and the second protrusion 210, as Figure 6 shown in (c) of

[0062] Next, as Figure 7 shown, a process of injecting a thermally conductive resin into the battery module is performed.

[0063] In the inverted state where the lower surface 202 is located at the upper part, the injection of the thermally conductive resin is performed through the injection holes (H) formed in the lower surface 202 of the module frame 200. At this time, although the battery module is in an inverted state, the battery cell assembly 400 is supported by the first protrusion 510 and the second protrusion 210, so it is possible to maintain a state where a space of a desired size is ensured between the battery cell assembly 400 and the upper surface 201. In addition, the space where the thermally conductive resin should be injected can be maintained at an appropriate pitch without change. That is, when the injection process is performed in the state where the module is inverted, in the prior art, the internal battery cell assembly 400 is forced to be arranged without a gap from the upper surface due to gravity. In this case, a larger injection space than required is generated, resulting in an inevitable increase in the injection amount of the thermally conductive resin. In addition, since the position of the battery cell assembly 400 is not fixed before the thermally conductive resin is cured, the position in the vertical direction at the upper part may change. However, according to the present exemplary embodiment, it is possible to prevent the position change of the battery cell assembly 400 that may occur during the injection process. In addition, since the position of the battery cell assembly 400 in the vertical direction at the upper part is fixed, the space dimensions of the upper surface and the lower surface of the module frame 200 can be maintained as expected. Therefore, the quality of the component dimensions of the battery module can be stabilized, and an increase in weight and cost due to excessive injection of the thermally conductive resin can be prevented.

[0064] As Figure 7 As shown in (b) of, after injecting and curing the thermally conductive resin, the battery module 100 is inverted again so that the components located at the upper part are located at the lower part.

[0065] As described above, a method for manufacturing a battery module 100 can be provided, in which when the battery cell assembly 400 is inserted into the module frame 200, the first protrusion 510 formed on the top frame 500 and the second protrusion 210 having the same height as the first protrusion 510 and formed on the inner side of the upper surface 201 of the module frame 200 enable the gap between the battery cell assembly 400 and the module frame 200 to be maintained as expected. Therefore, the dimensional stability of the components can be ensured, and excessive injection of the thermally conductive resin can be prevented.

[0066] It should be noted that one or more battery modules according to the exemplary embodiments of the present invention can be encapsulated in a battery pack case to form a battery pack.

[0067] The above battery module and the battery pack including the battery module can be applied to various devices. These devices can include, for example, transportation devices such as electric bicycles, electric vehicles, and hybrid vehicles, but the present invention is not limited thereto, and the present invention can be applied to various devices capable of using the battery module and the battery pack including the battery module, which is also within the scope of the present invention.

[0068] Although the preferred exemplary embodiments of the present invention have been described in detail, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concepts of the present invention defined in the following claims also fall within the scope of the present invention.

[0069] <Description of Reference Numerals>

[0070] 100: Battery module

[0071] 110: Battery cell stack

[0072] 200: Module frame

[0073] 300: Bus bar frame

[0074] 400: Battery cell assembly

[0075] 500: Top frame

[0076] 510: First protrusion

[0077] 210: Second protrusion

Claims

1. A battery module, comprising: a battery cell stack in which a plurality of battery cells are arranged side by side and stacked adjacent to each other; a top frame that covers the upper surface of the battery cell stack; a bus bar frame that is combined with the top frame and covers the side surface of the battery cell stack; and a module frame that is quadrilateral tubular and configured to accommodate a battery cell assembly formed by combining the battery cell stack, the top frame, and the bus bar frame, wherein the top frame includes a first protrusion that protrudes toward the upper surface of the module frame at one end of the top frame, and wherein the module frame includes a second protrusion that protrudes toward the top frame at a position corresponding to the other end on the inner side of the upper surface of the module frame, which is opposite to the one end of the top frame.

2. The battery module according to claim 1, wherein the first protrusion and the second protrusion have the same protrusion height.

3. The battery module according to claim 1, wherein each of the first protrusion and the second protrusion has an inclined shape such that the height of the protrusion decreases in the direction toward the inside of the module frame.

4. The battery module according to claim 1, further comprising: a thermally conductive resin layer disposed between the lower surface of the module frame and the battery cell assembly.

5. The battery module according to claim 4, wherein the bus bar frame includes an extension portion that protrudes and extends along the lower surface of the battery cell stack, and wherein the thermally conductive resin layer is located inside the extension portion.

6. The battery module according to claim 4, wherein the one end and the other end are the ends on both sides in the length direction of the top frame, and wherein the first protrusion and the second protrusion are respectively arranged in two or more along the width direction perpendicular to the length direction.

7. A method for manufacturing a battery module, comprising: forming a battery cell assembly by combining a battery cell stack in which a plurality of battery cells are arranged side by side and stacked adjacent to each other, a top frame that covers the upper surface of the battery cell stack, and a bus bar frame that is combined with the top frame and covers the side surface of the battery cell stack; and inserting the battery cell assembly into a quadrilateral tubular module frame, wherein the top frame includes a first protrusion that protrudes toward the upper surface of the module frame at one end of the top frame, wherein the module frame includes a second protrusion that protrudes toward the inside of the module frame at a position corresponding to the other end on the inner side of the upper surface of the module frame, which is opposite to the one end of the top frame, and Among them, the step of inserting the battery cell assembly is performed in a state where the upper surfaces of the top frame and the module frame are located below with the direction of gravity as a reference, and the step of inserting the battery cell assembly includes inserting the other end of the top frame toward the second protrusion.

8. The method according to claim 7, wherein, the first protrusion and the second protrusion have the same protrusion height.

9. The method according to claim 8, further comprising: after inserting the battery cell assembly, injecting and curing a thermally conductive resin between the battery cell assembly and the lower surface of the module frame, wherein, when injecting and curing the thermally conductive resin, the battery cell assembly is supported by the first protrusion and the second protrusion.

10. The method according to claim 7, wherein, each of the first protrusion and the second protrusion has an inclined shape such that the height of the protrusion decreases in the direction toward the inside of the module frame, and wherein, in the step of inserting the battery cell assembly, the other end of the top frame is inserted along the inclined shape of the second protrusion.

11. A battery pack, comprising at least one battery module according to claim 1.

Images