Manufacturing method of battery module

Abstract

The present disclosure provides a method for manufacturing a battery module comprising a coating step of applying an adhesive material to at least one surface of a battery cell unit, wherein the battery cell unit comprises a plurality of battery cells stacked, and the battery cell comprises a cell assembly and a tab protruding from the cell assembly, and wherein, in the coating step, the adhesive material is applied to one side of the at least one battery cell where the tab is not protruding.

Description

Technology Field

[0001] The present disclosure relates to a method for manufacturing a battery module. Furthermore, the present disclosure relates to a battery module manufactured by the said method and applications of said battery module. Background Technology

[0002] Recently, the demand for mobile devices such as smartphones, tablet PCs, and wireless earphones has been increasing. Furthermore, as the development of electric vehicles, energy storage batteries, robots, and satellites accelerates, research on high-performance secondary batteries capable of repeated charging and discharging as an energy source is actively underway.

[0003] Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries have the advantages of being able to charge and discharge freely with almost no memory effect compared to nickel-based rechargeable batteries, having a very low self-discharge rate, and high energy density. The problem to be solved

[0004] According to one aspect of the present disclosure, a method for manufacturing a battery module can be provided that prevents defects caused by the process and improves the heat dissipation characteristics of the final product. Additionally, according to one aspect of the present disclosure, a method for manufacturing a battery module can be provided that prevents defects caused by the process and improves the safety of the final product by preventing an adhesive material from entering between battery cells. Additionally, according to one aspect of the present disclosure, a battery module manufactured by the method for manufacturing a battery module can be provided, and a battery pack and an electric device including the battery module can be provided.

[0005] A method for manufacturing a battery module according to one aspect of the present disclosure can be widely applied in green technology fields such as electric vehicles, battery charging stations, and other solar and wind power generation utilizing batteries. Furthermore, a method for manufacturing a battery module according to one aspect of the present disclosure can be applied to eco-friendly electric vehicles or hybrid vehicles, etc., to prevent climate change by suppressing air pollution and greenhouse gas emissions. means of solving the problem

[0006] A method for manufacturing a battery module according to one aspect of the present disclosure includes a coating step of applying an adhesive material to at least one surface of a battery cell unit, wherein a plurality of battery cells are stacked, and the battery cell comprises a cell assembly and a tab protruding from the cell assembly, and in the coating step, the adhesive material may be applied to one surface of the at least one battery cell where the tab is not protruding.

[0007] A method for manufacturing a battery module according to one aspect of the present disclosure may, in the coating step, apply the adhesive material such that a coating area is formed in at least a portion of the center of one side of the at least one battery cell.

[0008] A method for manufacturing a battery module according to one aspect of the present disclosure may, in the coating step, apply the adhesive material such that an uncoated area is formed in at least a portion of both ends of one side of the at least one battery cell.

[0009] In a method for manufacturing a battery module according to one aspect of the present disclosure, one side of the at least one battery cell includes a recess, and at least a portion of the recess may exist within a coating area.

[0010] In a method for manufacturing a battery module according to one aspect of the present disclosure, the center of one side of the at least one battery cell may be formed in a recess.

[0011] A method for manufacturing a battery module according to one aspect of the present disclosure further comprises the step of obtaining a profile of one aspect of at least one battery cell, and the coating step may apply the adhesive material according to the obtained profile.

[0012] In a method for manufacturing a battery module according to one aspect of the present disclosure, a profile of one aspect of the at least one battery cell can be obtained through laser irradiation.

[0013] A method for manufacturing a battery module according to one aspect of the present disclosure can derive a center of one side of at least one battery cell in the step of obtaining the profile.

[0014] A method for manufacturing a battery module according to one aspect of the present disclosure may include an insertion step in which a battery cell unit coated with the adhesive material is inserted into a module housing.

[0015] In a method for manufacturing a battery module according to one aspect of the present disclosure, the module housing comprises a support plate that supports a battery cell unit and side plates provided in both corner regions of the support plate, and in the insertion step, the battery cell unit can be inserted with the side plates spread apart.

[0016] In a method for manufacturing a battery module according to one aspect of the present disclosure, the side plate comprises an elastic body, and in the insertion step, the side plate is pulled within an elastic limit to spread the side plate, and a battery cell unit coated with an adhesive material can be inserted into the module housing in which the side plate is spread.

[0017] A method for manufacturing a battery module according to one aspect of the present disclosure may, in the insertion step, insert the battery cell unit coated with the adhesive material into a module housing while at least two sides of the battery cell unit are pressed.

[0018] A method for manufacturing a battery module according to one aspect of the present disclosure may release the pressure when the pressurized battery cell unit contacts the side plate during the insertion step.

[0019] In a method for manufacturing a battery module according to one aspect of the present disclosure, the adhesive material may include one or more selected from the group consisting of silicone resin, acrylic resin, urethane resin, and epoxy resin.

[0020] A battery module according to one aspect of the present disclosure may be manufactured according to a method for manufacturing a battery module according to one aspect of the present disclosure.

[0021] A battery pack according to one aspect of the present disclosure may include one or more battery modules, and said battery modules may be battery modules according to one aspect of the present disclosure. Additionally, an electric device according to one aspect of the present disclosure may include one or more selected from the group consisting of one or more battery modules and one or more battery packs, said battery modules may be battery modules according to one aspect of the present disclosure, and said battery packs may be battery packs according to one aspect of the present disclosure. Effects of the invention

[0022] According to one aspect of the present disclosure, defects caused by the process can be prevented and the heat dissipation characteristics of the final product can be improved. In addition, according to one aspect of the present disclosure, defects caused by the process can be prevented and the safety of the final product improved by preventing adhesive material from entering between battery cells. Brief explanation of the drawing

[0023] The drawings shown in this disclosure are illustrative of this disclosure, and the ratios of the width, height, or thickness (or height) of each component are intended to illustrate this disclosure in detail and may differ from the actual proportions. Additionally, in the coordinate system shown in the drawings, each axis may be perpendicular to the others, the direction indicated by the arrow may be the + direction, and the direction opposite to the direction indicated by the arrow (rotated 180 degrees) may be the - direction. FIG. 1 is a drawing illustrating an exemplary structure of a battery cell according to one aspect of the present disclosure. FIG. 2 is a drawing illustrating the structure of a battery module according to one aspect of the present disclosure in an exemplary manner. FIG. 3 is a drawing illustrating the structure of a battery pack according to one aspect of the present disclosure in an exemplary manner. FIG. 4 is a drawing exemplarily illustrating the structure of a battery cell unit according to one aspect of the present disclosure. FIG. 5 is a drawing showing at least a part of the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 6 is a drawing showing at least a portion of the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 7 is a drawing showing at least a part of the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 8 is a drawing illustrating the structure of a battery cell according to one aspect of the present disclosure in an exemplary manner. FIG. 9 is a drawing showing at least a part of the step of obtaining a profile of a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 10 is a drawing showing at least a portion of the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 11 is a drawing showing at least a portion of the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 12 is a drawing showing at least a part of the insertion step of a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 13 is a drawing showing at least a part of the insertion step of a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 14 is a drawing showing at least a part of the insertion step of a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 15 is a drawing showing at least a part of the insertion step of a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 16 is a simplified drawing illustrating a semi-finished product of a battery module manufactured according to a method for manufacturing a battery module according to one aspect of the present disclosure. FIG. 17 is a CT (Computed Tomography) image showing the bottom surface of a semi-finished battery module manufactured according to a method for manufacturing a battery module according to one aspect of the present disclosure (cross-section AA' of FIG. 16). Specific details for implementing the invention

[0024] Hereinafter, the present disclosure will be described in detail with reference to the attached drawings. However, this is merely illustrative and the present disclosure is not limited to the specific embodiments described illustratively.

[0025] Among the physical properties mentioned in this specification, if the measured temperature and / or pressure affects the physical property, unless specifically otherwise specified, said physical property is the property measured at room temperature and atmospheric pressure.

[0026] As the management of heat generated from electric products, electronic products, or batteries such as secondary batteries has become an important issue, various heat dissipation measures have been proposed. For example, battery modules may include a heat dissipation adhesive layer that secures battery cells while efficiently transferring heat generated from the battery cells to the outside.

[0027] In one example, a heat dissipation adhesive is applied to the lower inner surface of a module case, and a plurality of battery cells are attached to the applied adhesive to manufacture a battery module.

[0028] In addition, in one example, to manufacture a battery module, a method is adopted in which a plurality of battery cells are stacked horizontally in a row to assemble them into a battery cell unit, and then the assembled battery cell unit is inserted into a module case. Here, the battery module may be manufactured by pressing at least two sides of the battery cell unit to minimize the space between the battery cells in order to minimize the volume, then inserting it into the module case, and then releasing the pressure.

[0029] However, when a battery cell unit, which has been pressed on both sides as described above, is brought into contact with the heat dissipation adhesive while the heat dissipation adhesive is applied to the lower inner surface of the module case, there may be cases where the battery cell is pushed out and the heat dissipation adhesive is pushed to one side when the pressure is released. In this case, it may result in the unnecessary use of the heat dissipation adhesive or cause the heat dissipation adhesive to be inserted into the space between the battery cells.

[0030] According to one aspect of the present disclosure, a method for manufacturing a battery module can be provided that prevents defects caused by the process and improves the heat dissipation characteristics of the final product. Additionally, according to one aspect of the present disclosure, a method for manufacturing a battery module can be provided that prevents defects caused by the process and improves the safety of the final product by preventing an adhesive material (200) from entering between the battery cells (1). Additionally, according to one aspect of the present disclosure, a battery module (2) manufactured by the method for manufacturing a battery module can be provided, and an electric device comprising one or more selected from the group consisting of a battery pack (3) including the battery module (2) and an electric device can be provided.

[0031] FIG. 1 is a drawing illustrating an exemplary part of the structure of a battery cell (1) according to one aspect of the present disclosure. FIG. 2 is a drawing illustrating an exemplary structure of a battery module (2) according to one aspect of the present disclosure. FIG. 3 is a drawing illustrating an exemplary structure of a battery pack (3) according to one aspect of the present disclosure.

[0032] The structure of a battery cell (1) according to one aspect of the present disclosure may be known. The battery cell (1) may include an electrode assembly and an electrolyte (1d). Referring to FIG. 1, the electrode assembly may include a positive electrode (1a), a negative electrode (1b), and a separator (1c). Also, referring to FIG. 1, the battery cell (1) may have a structure comprising a positive electrode (1a) and a negative electrode (1b), with a separator (1c) interposed between the positive electrode (1a) and the negative electrode (1b). Additionally, the battery cell (1) may have a structure in which the electrolyte (1d) is filled within a sealed space due to the outer casing (1e) of the battery cell.

[0033] The above-mentioned cathode (1a) may refer to a reduction electrode where an electron transfer material receives electrons when the battery cell (1) is discharged. The above-mentioned anode (1b) may refer to an oxidation electrode where an electron transfer material transfers electrons when the battery cell (1) is discharged. Additionally, the above-mentioned separator (1c) may refer to a membrane through which an electron transfer material passes while preventing an electrical short circuit between the cathode (1a) and the anode (1b). Additionally, the above-mentioned electrolyte (1d) may refer to a medium that causes the movement of an electron transfer material to facilitate the electrochemical reaction between the cathode (1a) and the anode (1b).

[0034] Meanwhile, although FIG. 1 illustrates an electrolyte (1d) in a liquid state, as described above, a solid state electrolyte, such as a gel-type polymer electrolyte, may also be used. A battery using a solid state electrolyte can generally be called a solid battery or an all-solid battery. In the case of a liquid state electrolyte, it may generally contain an organic solvent and a lithium salt.

[0035] As mentioned above, they are classified in various ways depending on the type of electron transfer material. For example, if the electron transfer material is lithium (Li, including ions), the battery can be called a lithium-ion battery.

[0036] In addition, the outer casing (1e) of the battery cell can protect the positive electrode (1a), negative electrode (1b), and separator (1c) from external impact and prevent the electrolyte (1d) from leaking out. Depending on the shape of the outer casing (1e) of the battery cell, the battery cell (1) can be classified as prismatic, coin-shaped, cylindrical, or pouch-shaped. In the present disclosure, the battery cell (1) may preferably be pouch-shaped.

[0037] A battery module (2) according to one aspect of the present disclosure may be manufactured according to a method for manufacturing a battery module according to one aspect of the present disclosure. Additionally, the structure of the battery module (2) may be known. Referring to FIG. 2, the battery module (2) may have a structure comprising a battery cell unit (2a), upper and lower housings (2b-1, 2b-2), a busbar (2c), and an inner and outer cover (2d-1, 2d-2).

[0038] The above battery module (2) may include a structure in which one or more battery cells (1) are placed in a housing to protect them from external shock, heat, vibration, etc.

[0039] The above battery cell unit (2a) may include one or more battery cells (1), and in the case of multiple units, may refer to a structure in which the battery cells (1) are electrically connected in series and / or parallel. The above battery cell unit (2a) may be embedded in a space formed by a lower housing (2b-1) and an upper housing (2b-2). However, the method of embedding the above battery cell unit (2a) is not limited by FIG. 2. The above battery cell unit (2a) may be a battery cell unit (100) according to one aspect of the present disclosure.

[0040] Additionally, the term "electrically connected" as used in this specification may mean a state in which an electrical circuit is formed when a connected object is connected by a connecting means, thereby allowing current to flow through each of the connected objects. The connecting means is not particularly limited as long as electrical connection is possible, but it may be direct contact between the connected objects or a wire through which current can flow. The plurality of battery cells (1) may be electrically connected to one another in series, in parallel, or through a combination thereof.

[0041] Meanwhile, the battery cell (1) may include a tab (12). Specifically, the battery cell (1) may include a positive tab extending from the positive electrode and a negative tab extending from the negative electrode. The term "taps" (12) may refer collectively to the positive tab and the negative tab. The battery cell unit (2a) may have a structure in which positive tabs and negative tabs protrude as many times as the number of included battery cells (1). The positive tab and the negative tab may each be electrically coupled to a busbar (2c) having a slit. The positive tab and the negative tab may be electrically coupled by inserting the positive tab and the negative tab into the slit of the busbar (2c), respectively. Additionally, the battery module (2) may include an inner cover (2d-1) and an outer cover (2d-2) to cover the busbar (2c) and the battery cell unit (2a).

[0042] The structure of a battery pack (3) according to one aspect of the present disclosure may be known. Referring to FIG. 3, the battery pack (3) may include one or more battery modules (2) and electrical components (3e), such as various control devices including a BMS, on a mounting surface (3b) formed inside a pack housing (3a).

[0043] The above battery pack (3) may include one or more selected from the group consisting of the battery cell (1) and battery module (2), and may include a structure equipped with various control devices and protection systems such as a Battery Management System (BMS) and a cooling device.

[0044] The above battery pack (3) may be composed of battery cells (1) rather than battery modules (2), in which case it can be called a so-called cell-to-pack.

[0045] The battery pack (3) may include various configurations to ensure structural rigidity of the pack housing (3a). The battery pack (3) may include a cross member (3d) formed protruding from the tray (3a-1) of the pack housing (3a) across the entire tray (3a-1) to connect the opposing side wall portions (3a-2) of the pack housing (3a). Additionally, the battery pack (3) may be provided with a partition wall (3c) formed protruding from the tray (3a-1) of the pack housing (3a) in a manner that connects the cross member (3d) and the side wall portions (3a-2).

[0046] An electric device according to one aspect of the present disclosure may include one or more selected from the group consisting of one or more battery modules (2) and one or more battery packs (3) according to one aspect of the present disclosure. The electric device may mean a device that operates through power generated from a battery cell (1), etc. The electric device may be, for example, a mobile phone, a home appliance, an electric vehicle, a hybrid vehicle, or an energy storage system (ESS).

[0047] A method for manufacturing a battery module according to one aspect of the present disclosure is characterized by the process of inserting a battery cell unit (2a) into a lower housing (2b-1). The battery cell unit (2a) may be a battery cell unit (100, see FIG. 4) according to one aspect of the present disclosure. Additionally, the lower housing (2b-1) may be referred to as a module housing (20) in the present disclosure, and the module housing (20) may include a support plate (21) and a side plate (22) (see FIG. 12).

[0048] In addition, the method for manufacturing a battery module according to one aspect of the present disclosure is characterized by a method of applying an adhesive material (200) (see FIG. 5). In particular, as previously described, the battery module (2) requires heat dissipation measures for safety reasons, and as a heat dissipation measure, a method of forming a heat dissipation adhesive layer by applying a heat dissipation material to the adhesive material used to fix the battery cell (1) is mainly used. However, the battery module (2) was manufactured by applying the heat dissipation adhesive to the inner surface of the module housing (20) and inserting a battery cell unit (2a) thereon, but this manufacturing method had several problems. Accordingly, the method for manufacturing a battery module according to one aspect of the present disclosure can improve the problems caused by the above method.

[0049] FIG. 4 is a diagram illustrating the structure of a battery cell unit (100) according to one aspect of the present disclosure. FIG. 5 is a diagram illustrating at least a part of the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure.

[0050] A method for manufacturing a battery module according to one aspect of the present disclosure may include a coating step of applying an adhesive material (200) to at least one surface of a battery cell unit (100). Additionally, the battery cell unit (100) may include one or more battery cells (1). In another example, the battery cell unit (100) may include a plurality of battery cells (1). In this case, the battery cell unit (100) may include a structure in which the battery cells (1) are electrically connected to each other in series and / or parallel.

[0051] In a method for manufacturing a battery module according to one aspect of the present disclosure, a battery cell unit (100) may include a plurality of battery cells (1) and may include a structure in which the plurality of battery cells (1) are stacked. That is, the battery cell unit (100) may include a structure in which a plurality of battery cells (1) are stacked.

[0052] In a method for manufacturing a battery module according to one aspect of the present disclosure, a battery cell unit (100) may have a plurality of battery cells (1) stacked thereon. Additionally, the battery cell unit (100) may have a structure in which a plurality of battery cells (1) are electrically connected in series and / or parallel (see FIG. 4). Additionally, specifically, the battery cell unit (100) may include a structure in which a plurality of battery cells (1) are arranged side by side and stacked in a horizontal direction.

[0053] In addition, in a method for manufacturing a battery module according to one example of the present application, the battery cell (1) may include a cell assembly (11) and a tab (12) protruding from the cell assembly (11) (see FIG. 4).

[0054] The cell assembly (11) includes an electrode assembly embedded in an internal space formed through the outer material (1e) of the battery cell, and may also include an electrolyte (1d) filled in the internal space (see FIG. 1).

[0055] The tab (12) may be made of a material that can be electrically connected to the current collector of a specific electrode (positive or negative) within the cell assembly (11) without physically or chemically affecting it. Additionally, the tab (12) may use the same material as the current collector of each electrode within the cell assembly (11). Furthermore, the tab (12) may have an extended structure that is electrically connected to the electrode assembly, and the extended structure may protrude from the cell assembly (11) as described above. Additionally, the tab (12) may specifically include a positive tab and a negative tab, the positive tab may have an extended structure that is electrically connected to the positive (1a) of the electrode assembly, and the negative tab may have an extended structure that is electrically connected to the negative (1b) of the electrode assembly.

[0056] In the present disclosure, the state in which a plurality of battery cells (1) are arranged side by side and stacked in a horizontal direction may mean that the tabs (12) of the battery cells (1) are facing each other in the same direction as in FIG. 4 and are stacked in a horizontal direction (i.e., the x-axis direction in FIG. 4).

[0057] In the present disclosure, the tab (12) may protrude from the cell assembly (11). Referring to FIG. 4, the battery cell (1) comprises a cell assembly (11) and two tabs (12), and the two tabs (12) protrude from the cell assembly (11), and the direction in which each tab (12) protrudes may point in opposite directions. That is, in FIG. 4, one tab (12) may protrude in the +y direction and the other tab (12) may protrude in the -y direction. The number of tabs (12) and the direction in which the tabs (12) protrude are not particularly limited, and the directions in which the two tabs (12) protrude may point in the same direction.

[0058] In a method for manufacturing a battery module according to one aspect of the present disclosure, the adhesive material (200) may include an adhesive component, and the adhesive component may include one or more selected from the group consisting of silicone resin, acrylic resin, urethane resin, and epoxy resin. Meanwhile, the adhesive material may include an adhesive component that is thermally conductive itself. The thermally conductive adhesive component may include, for example, one or more resins having a thermal conductivity of 0.1 W / mK or higher. The thermal conductivity may be measured using a Hot Disk measuring device, such as one according to the ISO 22007-2 standard.

[0059] Additionally, the adhesive material (200) may have adhesive performance on its own. In another example, the adhesive material (200) may not have adhesive performance on its own, but may be configured to acquire adhesive performance through curing or polymerization reactions. In this case, the method for manufacturing the battery module may include a step in which curing or polymerization reactions are performed after the adhesive material (200) is applied.

[0060] Additionally, the adhesive material (200) may include one or more selected from the group consisting of flame-retardant materials and heat-dissipating materials. The flame-retardant material may impart flame-retardancy to the adhesive material (200). Various known flame retardants may be used as the flame-retardant material without special limitations. The flame retardant may be a halogen flame retardant containing halogen elements (a term encompassing F, Cl, Br, and I) or a non-halogen flame retardant not containing halogen elements, or a phosphorus-based flame retardant containing phosphorus (P) or an inorganic flame retardant exemplified by a metal oxide (e.g., aluminum hydroxide). The heat-dissipating material may impart heat dissipation properties to the adhesive material (200). Various known heat-dissipating materials may be used as the heat-dissipating material without special limitations. The heat-dissipating material may be a ceramic filler exemplified by aluminum oxide, aluminum hydroxide, magnesium oxide, magnesium hydroxide, and boron nitride.

[0061] A method for manufacturing a battery module according to one aspect of the present disclosure may, in the coating step, apply the adhesive material (200) to one side (13) of the at least one battery cell (1). Here, the one side (13) of the at least one battery cell (1) may also be referred to as the side (13) to be coated in the present specification. The one side (13) of the at least one battery cell (1) may be one of the surfaces where the tab (12) of the battery cell (1) does not protrude. The one side (13) of the at least one battery cell (1) may refer to the so-called bottom surface of the battery cell (1). Referring to FIG. 4, an example of the one side (13) of the at least one battery cell (1) is illustrated.

[0062] In the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure, the side (13) to be coated of each battery cell (1) constituting the battery cell unit (100) may ultimately form the side to be coated of the battery cell unit (100). In the coating step, an adhesive material (200) may be applied to at least a portion of the side to be coated of the battery cell unit (100). More specifically, as described above, the adhesive material (200) may be applied to at least a portion of the side (13) to be coated of each battery cell (1) constituting the battery cell unit (100).

[0063] In the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure, an adhesive material (200) may be applied through a coating device (300) (see FIG. 5). The coating device (300) may include a receiving portion (310) for receiving the adhesive material (200) and a discharging portion (320) for discharging the adhesive material (200) received in the receiving portion to the outside. The adhesive material (200) may be discharged by flowing naturally due to gravity or discharged through a discharging device such as a pump.

[0064] Referring to FIG. 5, a coating device (300) is applying an adhesive material (200) to one side (13) of at least one battery cell (1). The coating device (300) may be movable. Although not shown in FIG. 6, the coating device (300) may be movable via a movement device such as a transfer rail. Additionally, the coating device (300) may move freely in all directions, including the x-axis, y-axis, and z-axis, as well as diagonal directions, and the direction of movement is not particularly limited.

[0065] FIG. 6 is a drawing showing at least a portion of the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure. Referring to FIG. 6, a coating device (300) may apply an adhesive material (200) along a side (13) to be coated on a battery cell (1). Also, referring to FIG. 6, the coating device (300) may move in the -y direction along the side (13) to be coated and continuously apply the adhesive material (200) while moving.

[0066] FIG. 7 is a drawing showing at least a part of the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure. After the coating device (300) has applied an adhesive material (200) to the side (13) to be coated of one battery cell (1), the adhesive material (200) can be applied to the side (13) to be coated of the next battery cell (1). Referring to FIG. 7, after applying the adhesive material (200) to one battery cell (1), the adhesive material (200) can be applied to the next battery cell (1). Here, when the coating device (300) applies the adhesive material (200) to the next battery cell (1), the adhesive material (200) can be applied while moving in the -y direction, just as when applying to the previous battery cell (1) (see FIG. 7). However, it is not limited to this, and the above-mentioned coating device (300) may apply the adhesive material (200) while moving in the +y direction when applying the adhesive material (200) to the next battery cell (1).

[0067] When the adhesive material (200) is applied to the battery cell unit (100) in the manner described above, the adhesive material (200) is applied to all of the side (13) to be applied to the at least one battery cell (1). Referring to FIG. 14, the battery cell unit (100) in a state where the adhesive material (200) is applied to all of the side (13) to be applied to the at least one battery cell (1) can be seen.

[0068] A method for manufacturing a battery module according to one aspect of the present disclosure comprises, in the coating step, applying an adhesive material (200) to at least a portion of the central part (C) of one side (13) of at least one battery cell (1) in a coating area (A C ) can be applied to form (see FIG. 8 and 12). Additionally, in a method for manufacturing a battery module according to one aspect of the present disclosure, in the application step, an adhesive material (200) is applied to at least a portion of the ends (C1, C2) of one side (13) of at least one battery cell (1) in an unapplied area (A D It can be applied to form ) (see FIGS. 8 and 12).

[0069] FIG. 8 is a diagram illustrating the structure of a battery cell according to one aspect of the present disclosure. Referring to FIG. 8, one battery cell (1) constituting a battery cell unit (100) can be seen. Through FIG. 8, the center (C) of the side (13) to be coated on the battery cell (1) can be described.

[0070] Referring to FIG. 8, one side (13) of the at least one battery cell (1) may have a first line (C1) which is one of the two ends and a second line (C2) which is the other of the two ends. Here, a point (P2) of the second line (C2) that is perpendicular to a point (P1) on the first line (C1) can be derived. Here, a center point (P C ) may refer to a point that exists on a vertical distance and where the distance between a point (P1) on the first line (C1) and a point (P2) on the second line (C2) is equal. Additionally, the center (C) may refer to a central point (P) encompassing the entire first line (C1) and the second line (C2). CIt may be a set of ). That is, the center (C) may mean a line located at the center of the vertical distance between the first line (C1) and the second line (C2). The term vertical distance as used in this specification may mean an imaginary line that is vertical (90 degrees) with respect to a point (P) of any one line (L). Referring to FIG. 8, the center (C) of one side (13) of the at least one battery cell (1) according to one aspect of the present disclosure can be identified.

[0071] A method for manufacturing a battery module according to one aspect of the present disclosure, in the coating step, an adhesive material (200) may be coated to include a central part (C) of one side (13) of the at least one battery cell (1), and by being coated, a coated area (A C ) can be formed. In addition, the adhesive material (200) does not apply to the entire side (13) of the at least one battery cell (1), but rather to an uncoated area (A D It can be applied so as to form ) and the unapplied area (A D ) can be formed to include both ends (C1, C2) of one side (13) of the at least one battery cell (1). Referring to FIG. 11, the adhesive material (200) is applied to include the center (C) of one side (13) of the at least one battery cell (1), so as to form an applied area (A C It can be seen that it forms a ). Also, referring to FIG. 11, the adhesive material (200) is not applied to some areas from both ends (C1, C2), so an unapplied area (A D It can be seen that it forms ).

[0072] A method for manufacturing a battery module according to one aspect of the present disclosure comprises, as described above, applying a coating area (A) to one side (13) of the at least one battery cell (1). C ) and uncoated area (A DBy forming the adhesive material (200), it is possible to prevent the adhesive material (200) from entering between the battery cells (1). Additionally, by preventing the adhesive material (200) from entering between the battery cells (1), defects caused by the process can be prevented and the safety of the final product, the battery module, can be improved.

[0073] A method for manufacturing a battery module according to one aspect of the present disclosure may further include a step of obtaining a profile of one side (13) of the at least one battery cell (1). The step of obtaining a profile of one side (13) of the at least one battery cell (1) may be performed prior to a coating step. The term "profile" as used herein may mean a three-dimensional shape representing one side (13) of the at least one battery cell (1). Through the profile, both ends (C1, C2) and the center (C) of one side (13) of the at least one battery cell (1) can be derived, and a curvature or depression between the two ends (C1, C2) can also be derived, and the degree of curvature or depression can be derived based on depth and width.

[0074] A method for manufacturing a battery module according to one aspect of the present disclosure may apply an adhesive material (200) according to a profile obtained based on a step of obtaining a profile of one side (13) of at least one battery cell (1). That is, in the method for manufacturing the battery module, the application step may be performed according to the profile obtained above.

[0075] Meanwhile, in the step of acquiring a profile of one side (13) of at least one battery cell (1), the process of acquiring the profile is not particularly limited and can be acquired using a vision device, etc. Additionally, the profile can be acquired using a laser (410) emitted through a laser device (400) (see FIG. 9).

[0076] FIG. 9 is a drawing illustrating at least a part of the step of obtaining a profile of a battery module according to one aspect of the present disclosure. Referring to FIG. 9, the step of obtaining a profile of one side (13) of the at least one battery cell (1) may use a laser (410) emitted through a laser device (400). That is, the step of obtaining the profile may be performed by irradiating the laser (410). Here, the type and intensity of the laser (400) are not particularly limited and may be used as suitable for obtaining the profile. The laser device (400) may be movable. Although not shown in FIG. 10, the laser device (400) may be movable via a moving device such as a transfer rail. In addition, the laser device (400) may move freely in all directions, including the x-axis, y-axis, and z-axis, as well as diagonal directions, and the direction of movement is not particularly limited.

[0077] Meanwhile, the laser device (400) may include a laser output unit, a laser recognition unit, and a data control unit. The laser output unit may be configured to output a laser (410). Additionally, the laser recognition unit may be configured to recognize the laser (410) that is reflected after the laser (410) emitted from the output unit comes into contact with an external material. Additionally, the data control unit may be configured to derive and calculate a profile according to a predetermined logic based on the output laser (410) and the reflected and recognized laser (410). The predetermined logic may be designed using the position and distance information of both ends (C1, C2) obtained through the laser (410), as well as the degree of curvature or depression.

[0078] Referring to FIG. 9, the laser device (400) can derive a profile of one side (13) of the at least one battery cell (1) by moving along one side (13) of the at least one battery cell (1) through laser irradiation (410). Additionally, the laser device (400) can derive a profile including the center (C) of one side (13) of the at least one battery cell (1) through the laser (410). The center (C) of one side (13) of the at least one battery cell (1) can be derived by calculation according to the aforementioned method (see FIG. 9) based on the position and distance information of both ends (C1, C2) obtained through laser irradiation (410). That is, the aforementioned method for deriving the center (C) may be one of the aforementioned defined logics.

[0079] Meanwhile, in a method for manufacturing a battery module according to one aspect of the present disclosure, one side (13) of at least one battery cell (1) may include a recess (14). The recess (14) may be formed during the assembly process of the battery cell (1). Referring to FIG. 9, it can be seen that one side (13) of at least one battery cell (1) includes a recess (14) in at least a portion of the area.

[0080] In the step of obtaining a profile of one side (13) of at least one battery cell (1) of a method for manufacturing a battery module according to one aspect of the present disclosure, a laser device (400) can derive the degree of indentation of a recess (14) of one side (13) of the at least one battery cell (1) through a laser (410). The laser device (400) can derive data regarding the degree of indentation based on the width and height of the recess (14). Referring to FIG. 9, the laser device (400) can derive data regarding the recess (14) formed on one side (13) of the at least one battery cell (1). Based on the data regarding the recess (14), the amount of adhesive material (200) to be applied by the coating device (300) can be determined.

[0081] In a battery module according to one aspect of the present disclosure, a coating device (300) and a laser device (400) may be connected to each other via communication. Data regarding the recessed portion (14) as well as the profile derived by the laser device (400) may be transmitted via communication to the coating device (300). To this end, the coating device (300) and the laser device (400) may include a transceiver capable of transmitting and receiving data. The coating device (300) may determine the amount of adhesive material (200) to be applied based on the profile and data regarding the recessed portion (14) received from the laser device (400). Additionally, it may include a calculation unit for determining this amount. Furthermore, the method of communication connection is not particularly limited and a known method may be applied.

[0082] Meanwhile, the coating device (300) can determine the amount of adhesive material (200) to be applied based on the profile received from the laser device (400) even if there is no depression (14) on one side (13) of at least one battery cell (1). Additionally, the coating device (300) can separately receive data regarding the profile and depression (14) obtained from the laser device (400) via a hardware configuration even if it is not connected to the laser device (400).

[0083] In a method for manufacturing a battery module according to one aspect of the present disclosure, at least a portion of the recess (14) is a coating area (A C It may exist within ). That is, the adhesive material (200) may be applied to at least a portion of the recess (14). Additionally, the center (C) of one side (13) of at least one battery cell (1) may be formed in the recess (14). That is, the adhesive material (200) may be applied to the center (C) formed in the recess (14) (see FIG. 10).

[0084] FIG. 10 is a drawing showing at least a portion of the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure. Referring to FIG. 10, it can be seen that an adhesive material (200) is applied through a coating device (300) to an area including a central part (C) formed in a recess (14). Here, the coating device (300) can determine the location to apply the adhesive material (200) through the aforementioned profile and can determine the amount of application based on data regarding the aforementioned recess (14).

[0085] FIG. 11 is a drawing showing at least a portion of the coating step of a method for manufacturing a battery module according to one aspect of the present disclosure. Referring to FIG. 11, it can be seen that an adhesive material (200) is applied to one side (13) of at least one battery cell (1) through a coating device (300), specifically applied to an area including a central part (C) formed in a recess (14). Also, referring to FIG. 11, a coating area (A C ) and uncoated area (A D You can also check examples of ).

[0086] Additionally, the adhesive material (200) may be applied to at least 80%, 85%, 90%, or 95% of the total length of one side (13) of at least one battery cell (1). The length of one side (13) of the at least one battery cell (1) may refer to the length of one side (13) of the at least one battery cell (1) along the y-axis direction when referring to FIG. 9.

[0087] A method for manufacturing a battery module according to one aspect of the present disclosure may include an insertion step in which a battery cell unit (100) coated with an adhesive material (200) is inserted into a module housing (20). The battery cell unit (100) coated with the adhesive material (200) may refer to a battery cell unit (100) in which the adhesive material (200) is applied to one side (13) of at least one battery cell (1) of one or more battery cells (1) constituting the battery cell unit (100). Preferably, the battery cell unit (100) coated with the adhesive material (200) may be a battery cell unit (100) in which the adhesive material (200) is applied to one side (13) of at least one battery cell (1) of all battery cells (1) constituting the battery cell unit (100).

[0088] In the insertion step of a method for manufacturing a battery module according to one aspect of the present disclosure, the module housing (20) may include a support plate (21) that supports a battery cell unit (100) and side plates (22) provided in both corner areas of the support plate (21). Meanwhile, the side plates (22) may be provided in both corner areas parallel to the support plate (21).

[0089] FIG. 12 is a drawing illustrating at least a part of the insertion step of a method for manufacturing a battery module according to one aspect of the present disclosure. Referring to FIG. 12, the module housing (20) may include a support plate (21) and two side plates (22) provided in both corner areas of the support plate (21). Specifically, referring to FIG. 12, the module housing (20) may include a support plate (21) and two side plates (22) provided in parallel corner areas of the support plate (21). Here, the module housing (20) may be an example of the lower housing (2b-1) in FIG. 3.

[0090] Referring to FIG. 12, it can be seen that a battery cell unit (100) coated with an adhesive material (200) is inserted into a module housing (20). The battery cell unit (100) coated with the adhesive material (200) can be inserted into the module housing (20) via a transfer device. The transfer device can pick up the battery cell unit (100) coated with the adhesive material (200). Additionally, the transfer device can transfer the battery cell unit (100) coated with the adhesive material (200) to another space while holding it.

[0091] The above transfer device can pick up and transfer the battery cell unit (100) coated with the adhesive material (200) so that the area coated with the adhesive material (200) (so-called bottom surface of the battery cell unit (100)) comes into contact with the support plate (21) of the module housing (20).

[0092] Referring to FIG. 12, a battery cell unit (100) coated with an adhesive material (200) can be positioned so that the area coated with the adhesive material (200) faces upward (+z direction), and then inserted into a module housing (20). At this time, the module housing (20) can also be positioned so that the bottom surface (outer surface of the support plate (21)) faces upward (+z direction) to allow the battery cell unit (100) coated with the adhesive material (200) to be inserted smoothly. That is, the module housing (20) and the battery cell unit (100) coated with the adhesive material (200) can be appropriately positioned so that the inner surface of the support plate (21) can come into contact with the bottom surface of the battery cell unit (100) coated with the adhesive material (200). The above transfer device can position or transfer the module housing (20) and the battery cell unit (100) coated with adhesive material (200) to a specific location, and can perform the aforementioned insertion step.

[0093] Meanwhile, the above transfer device can perform the pressurizing function of the pressurizing device (500) to be described later. Details regarding the pressurizing device (500) will be described later.

[0094] In FIG. 12, only the process of transporting the battery cell unit (100) coated with an adhesive material (200) is illustrated, but in other examples, the transport device can pick up the module housing (20). Additionally, the transport device can transport the module housing (20) to another space while holding it.

[0095] In the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, the width (W) of the module housing (20) H ) and height(H H Each of the following is the width (W) of the battery cell unit (100) coated with the adhesive material (200). C ) and height(H C Each can be greater than or equal to.

[0096] In the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, the width (L) of the module housing (20) H ) is the width (L) of the battery cell unit (100) coated with adhesive material (200). C It may be greater than, smaller than, or equal to ). Here, the width (L) of the module housing (20) H ) can mean the size of the vertical distance between each inner surface of the two side plates (22).

[0097] Preferably, the width (L) of the module housing (20) H ) is the width (L) of the battery cell unit (100) coated with adhesive material (200). C It may be smaller than or equal to ). Additionally, preferably, in the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, the width (L) of the module housing (20) H ) is the width (L) of the battery cell unit (100) coated with the adhesive material (200) to be described later when it is in a pressed state. C It can be greater than or equal to ')

[0098] If the measurement results for the aforementioned width (L), width (W), and height (H) are not consistent in each configuration (module housing (20) and battery cell unit (100)), the smallest value may be used as a representative. In other examples, the average value may be used as a representative.

[0099] In the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, the battery cell unit (100) coated with the adhesive material (200) may be inserted with each of the side plates (22) of the module housing (20) spread apart.

[0100] FIG. 13 is a drawing illustrating at least a part of the insertion step of a method for manufacturing a battery module according to one aspect of the present disclosure. Referring to FIG. 13, the two side plates (22) of the module housing (20) can each be spread apart, and a battery cell unit (100) coated with the adhesive material (200) can be inserted while the two side plates (22) are spread apart. In the above, the spreading of the two side plates (22) may mean having a vertical distance larger than the original vertical distance between the two side plates (22). That is, the spreading of the two side plates (22) means the width (L) of the module housing (20). H This may mean increasing the width (L) of the inlet area (E) into which the battery cell unit (100) coated with the adhesive material (200) is inserted, as the two side plates (22) are spread apart. H ') is the width (L) of the module housing (20) before spreading the two side plates (22) above. H It can be larger than ). In addition, as the two side plates (22) spread apart, the width (L) of the two side plates (22) increases as they approach the support plate (21) as shown in FIG. 14. H ) can be gradually reduced. As described above, if the battery cell unit (100) coated with adhesive material (200) is inserted while the two side plates (22) are spread apart, the insertion step can proceed more smoothly.

[0101] Meanwhile, in the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, the width (L) of the inlet area (E) into which the battery cell unit (100) coated with the adhesive material (200) on both side plates (22) is inserted H') is the width (L) of the battery cell unit (100) coated with adhesive material (200). C It can be larger than )

[0102] Referring to FIG. 13, in the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, an adsorption device (23) is attached to at least a portion of each of the two side plates (22) and can apply an adsorption force to each side plate (22) in a direction in which the side plates (22) spread apart. The side plates (22) can be spread apart through the adsorption device (23).

[0103] Referring to FIG. 13, in the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, the side plate (22) may be an elastic body. Additionally, the side plate (22) may include at least an elastic body.

[0104] Referring to FIG. 13, in the insertion step of a method for manufacturing a battery module according to one aspect of the present disclosure, the side plate (22) is pulled within an elastic limit to spread the side plate (22), and the battery cell unit (100) coated with the adhesive material (200) can be inserted into the module housing (20) in which the side plate (22) is spread.

[0105] In the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, at least two surfaces of a battery cell unit (100) coated with an adhesive material (200) may be pressed. Specifically, at least two surfaces of the battery cell unit (100) coated with the adhesive material (200), including the main face, may be pressed. Preferably, at least two surfaces of the battery cell unit (100) coated with the adhesive material (200), including both main faces, may be pressed. In the above, the main face may refer to, for example, a surface having a large area in a pouch-type battery cell (1). FIG. 14 is a drawing showing at least a part of the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure. Referring to FIG. 14, the location of the main face (M) of the battery cell (1) can be identified. Here, the main face (M) of the battery cell (1) may be the main face (M) of the battery cell unit (100). Additionally, referring to FIG. 14, the two main surfaces may be positioned opposite each other.

[0106] In the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, at least two surfaces of a battery cell unit (100) coated with an adhesive material (200) may be pressed through a pressing device (500). The pressing device (500) may press the battery cell unit (100) coated with the adhesive material (200) through a pressing means such as a press. The intensity of the pressing may be sufficient to minimize the space between the battery cells (1) constituting the battery cell unit (100) without damaging the battery cell unit (100). Referring to FIG. 14, the pressing device (500) may be positioned to press both main surfaces (M) and then press by contacting the two main surfaces (M). In the above, the pressing is applied to the width (L) of the battery cell unit (100) coated with the adhesive material (200). C It may mean reducing ).

[0107] In the insertion step of a method for manufacturing a battery module according to one aspect of the present disclosure, the insertion step can be performed more smoothly by pressing both main surfaces (M) of a battery cell unit (100) coated with an adhesive material (200).

[0108] Meanwhile, the width (L) of the module housing (20) H ) is the width (L) of the battery cell unit (100) coated with adhesive material (200) when it is in a pressed state. C It may be greater than or equal to '). Preferably, the width (L) of the module housing (20) H ) is the width (L) of the battery cell unit (100) coated with adhesive material (200) when it is in a pressed state. C It can be larger than '). As a result, the insertion step can proceed more smoothly (see Fig. 15).

[0109] In the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, at least two surfaces of a battery cell unit (100) coated with an adhesive material (200) can be pressed and inserted into a module housing (20).

[0110] Additionally, in the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, at least two sides of a battery cell unit (100) coated with an adhesive material (200) may be pressed while the side plates (22) are spread open and inserted into a module housing (20). FIG. 15 is a drawing showing at least a part of the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure. Referring to FIG. 15, both side plates (22) of the module housing (20) are spread open by an adsorption device (23), and at least two sides of a battery cell unit (100) coated with an adhesive material (200) may be pressed through a pressing device (500). Specifically, at least two sides of the battery cell unit (100) coated with the adhesive material (200), including the main surface (M), may be pressed through the pressing device (500). Preferably, the battery cell unit (100) coated with the adhesive material (200) may be pressed through the pressing device (500) on at least two surfaces, including both main surfaces (M) (see FIG. 14 and FIG. 15).

[0111] Through the insertion step as described above, the present disclosure can prevent defects caused by the process and improve the heat dissipation characteristics of the final product, and prevent the adhesive material (200) from entering between the battery cells (1), thereby preventing defects caused by the process and improving the safety of the final product.

[0112] Meanwhile, the above-mentioned pressurizing device (500) can perform the role of transferring the aforementioned transfer device. That is, the pressurizing device (500) and the transfer device are the same device (hereinafter referred to as a composite device), and the composite device can perform the functions possible in the transfer device and the functions possible in the pressurizing device (500). That is, the composite device can pressurize the battery cell unit (100) coated with adhesive material (200) and position and transfer it so that it is inserted into the module housing (20).

[0113] In FIG. 15, only the process of a coated battery cell unit (100) being transported under pressure and inserted into a module housing (20) is illustrated, but in other examples, a transport device may pick up the module housing (20), position it so that the bottom surface of the coated battery cell unit (100) and the inner surface of the support plate (21) come into contact with each other, and then transport and insert the module housing (20).

[0114] In the insertion step of the method for manufacturing a battery module according to one aspect of the present disclosure, the pressure can be released when the pressurized battery cell unit (100) comes into contact with the side plate (22). Here, the pressurizing device (500) can move in the up-down direction (i.e., z-direction in FIG. 15) and can apply pressure in the left-right direction (i.e., x-direction in FIG. 15).

[0115] In the insertion step of a method for manufacturing a battery module according to one aspect of the present disclosure, when the battery cell unit (100) coated with the adhesive material (200) in the pressurized state comes into contact with the inner surface of the side plate (22), the pressurization may be released. Herein, release may be a term encompassing gradually reducing or completely releasing the pressurization force. Additionally, in the insertion step, when the battery cell unit (100) coated with the adhesive material (200) in the pressurized state begins to come into contact with the inner surface of the side plate (22), the pressurizing device (500) may gradually reduce the pressurization force. Additionally, the pressurizing device (500) may control the pressurization force to be continuously reduced until the pressurization force is completely released when the battery cell unit (100) comes into contact with the inner surface of the support plate (21).

[0116] FIG. 16 is a simplified drawing illustrating a semi-finished product of a battery module manufactured according to a method for manufacturing a battery module according to one aspect of the present disclosure. A battery module (2) manufactured according to a method for manufacturing a battery module according to one aspect of the present disclosure can prevent defects caused by the process and improve the heat dissipation characteristics of the final product. In addition, a battery module (2) manufactured according to the method for manufacturing a battery module can prevent the adhesive material (200) from entering between the battery cells (1), thereby preventing defects caused by the process and improving the safety of the final product.

[0117] FIG. 17 is a CT (Computed Tomography) image showing the bottom surface of a semi-finished product of a battery module (2) manufactured according to a method for manufacturing a battery module according to one aspect of the present disclosure (cross-section AA' of FIG. 16). Referring to FIG. 17, it can be seen that the adhesive material (200) is not unilaterally formed and is not introduced between the battery cells (1).

[0118] The present disclosure may provide a battery module (2) manufactured according to the method of manufacturing a battery module described above. The method of manufacturing a battery module according to one aspect of the present disclosure may include the step of additionally assembling components necessary for manufacturing a finished product, such as an upper housing (2b-2), a bus bar (2c), and an inner and outer cover (2d-1, 2d-2), to a semi-finished product of the battery module (2) described above (see FIG. 2). A battery module (2) in the form of a finished product can be manufactured through the method of manufacturing a battery module according to one aspect of the present disclosure.

[0119] The above description is merely an example of applying the principles of the present disclosure, and other configurations may be included without departing from the scope of the present disclosure. Explanation of the symbols

[0120] 1: Battery cell 2: Battery Module 3: Battery Pack 11: Cell assembly 12: Tab 13: One aspect of at least one battery cell 14: Depression 20: Modular housing 21: Support plate 22: Side panel 23: Adsorption device 100: Battery cell unit 200: Adhesive material 300: Dispensing device 310: Reception Department 320: Discharge section 400: Laser device 410: Laser 500: Pressurizing device

Claims

Claim 1 A method for manufacturing a battery module comprising: a coating step of applying an adhesive material to at least one surface of a battery cell unit; and an insertion step of inserting the battery cell unit with the adhesive material applied thereto into a module housing, wherein the battery cell unit comprises a plurality of stacked battery cells, and the battery cell comprises a cell assembly and a tab protruding from the cell assembly, and wherein, in the coating step, the adhesive material is applied to one side of the at least one battery cell where the tab is not protruding, and the adhesive material is applied such that an uncoated area is formed in at least a portion of both ends of the one side of the at least one battery cell. Claim 2 A method for manufacturing a battery module according to claim 1, wherein, in the coating step, the adhesive material is applied such that a coating area is formed in at least a portion of the central part of one side of the at least one battery cell. Claim 3 delete Claim 4 A method for manufacturing a battery module according to claim 2, wherein one side of at least one battery cell includes a recess, and at least a portion of the recess is present within a coating area. Claim 5 A method for manufacturing a battery module according to claim 4, wherein the center of one side of at least one battery cell is formed in a recess. Claim 6 A method for manufacturing a battery module according to claim 1, further comprising the step of obtaining a profile of one side of at least one battery cell, wherein the coating step involves applying an adhesive material according to the obtained profile. Claim 7 In claim 6, a method for manufacturing a battery module in which the profile of one side of at least one battery cell is obtained through laser irradiation. Claim 8 A method for manufacturing a battery module according to claim 6, wherein the center of one side of at least one battery cell is derived in the step of obtaining the profile. Claim 9 delete Claim 10 A method for manufacturing a battery module according to claim 1, wherein the module housing comprises a support plate supporting a battery cell unit and side plates provided in both corner areas of the support plate, and in the insertion step, the battery cell unit is inserted with the side plates spread apart. Claim 11 A method for manufacturing a battery module according to claim 10, wherein the side plate comprises an elastic body, and in the insertion step, the side plate is pulled within an elastic limit to spread the side plate, and a battery cell unit coated with an adhesive material is inserted into the module housing in which the side plate is spread. Claim 12 A method for manufacturing a battery module according to claim 10, wherein, in the insertion step, at least two sides of a battery cell unit coated with the adhesive material are inserted into a module housing while being pressed. Claim 13 A method for manufacturing a battery module according to claim 12, wherein, in the insertion step, the pressure is released when the pressurized battery cell unit comes into contact with a side plate. Claim 14 A method for manufacturing a battery module according to claim 1, wherein the adhesive material comprises one or more selected from the group consisting of silicone resin, acrylic resin, urethane resin and epoxy resin.

Images