Resin applicator and battery pack

Abstract

The invention relates to a resin applicator for applying resin to at least one surface of a housing, or to at least part of at least one surface of a battery. The resin applicator comprises a container, a mixing unit connected to the container, and an applicator connected to the mixing unit. The applicator comprises at least one applicator tube arranged so that resin introduced from the mixing unit can flow through it, and a discharge unit with a storage space arranged so that resin introduced from at least one applicator tube accumulates in it. The discharge unit may comprise at least a first and second surface to form the storage space, and is constructed so that resin is discharged through a space between one end of the first surface set away from one end of the second surface.

Description

Resin composition application device and battery assembly

[0001] Cross-citation with related applications

[0002] This application is based on and claims the benefit of priority from Korean Patent Application Nos. 10-2023-0191414, 10-2024-0011670, 10-2024-0042103, 10-2024-0091040 and 10-2024-0196852, filed with the Korean Intellectual Property Office on December 26, 2023, January 25, 2024, March 27, 2024, July 10, 2024 and December 26, 2024, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] The present application relates to a resin composition application device and a battery assembly that apply a resin composition that can improve heat dissipation performance when applied to the battery field.

[0005] Recently, demand for mobile devices such as smartphones, tablet PCs, and wireless earphones has been increasing. Furthermore, with the development of electric vehicles, energy storage batteries, robots, and satellites in full swing, research is actively underway on high-performance secondary batteries capable of repeated charging and discharging as an energy source.

[0006] Currently commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries offer the advantages of virtually no memory effect compared to nickel-based batteries, allowing for free charging and discharging, a very low self-discharge rate, and high energy density.

[0007] Meanwhile, in order to secure high capacity and high output in a lithium secondary battery, multiple battery cells, which serve as functional units of the battery, can be stacked, and these can be electrically connected to each other by combining them in series and parallel connections.

[0008] The stacked battery cells can be housed and fixed within a housing. To fix the stacked batteries within the housing, a resin composition can be applied to the inner surface of the housing.

[0009] Specifically, a resin composition can be applied to the inner surface of a housing using a coating device, and then a battery cell can be placed thereon. Here, there is a need to shorten the time required to apply the resin composition using a coating device.

[0010] The present application can provide a resin composition application device that can shorten the time required for applying a resin composition and reduce the process tact time.

[0011] The present application can provide a resin composition application device that can protect a device from impact when applying a resin composition and minimize shaking during application.

[0012] The present application can provide a method for manufacturing a battery assembly (or, battery module, battery pack) using an improved resin composition application device and a battery assembly (or, battery module, battery pack) manufactured thereby.

[0013] A resin composition application device according to one embodiment of the present application can apply a resin composition to at least one side of a housing that accommodates a battery or at least a portion of at least one side of a battery.

[0014] A resin composition application device according to one embodiment of the present application includes a cartridge section, a mixer section connected to the cartridge section, and an application section connected to the mixer section, the application section includes at least one application pipe provided so that a resin composition introduced from the mixer section can pass therethrough, and a discharge section including a storage space provided so that the resin composition introduced from the at least one application pipe is accumulated, the discharge section includes at least a first surface and a second surface forming the storage space, and the resin composition can be configured to be discharged to the outside through a spaced space between one end of the first surface and one end of the second surface.

[0015] In a resin composition application device according to one embodiment of the present application, the first side and the second side can each independently have an inclination angle of more than 0 degrees and less than or equal to 90 degrees with respect to the surface on which the resin composition is to be applied.

[0016] In a resin composition application device according to one embodiment of the present application, when one of the first and second surfaces has an inclination angle of 90 degrees with respect to the surface on which the resin composition is to be applied, the other surface may have an inclination angle of more than 0 degrees and less than 90 degrees.

[0017] In a resin composition application device according to one embodiment of the present application, the cartridge portion includes a first cartridge portion for containing a subject composition and a second cartridge portion for containing a curing agent composition, the first cartridge portion may be connected to the mixer portion by a first connecting pipe so as to be fluidly connected, and the second cartridge portion may be connected to the mixer portion by a second connecting pipe so as to be fluidly connected.

[0018] In a resin composition application device according to one embodiment of the present application, the first connecting pipe and the second connecting pipe may not be connected to each other.

[0019] In a resin composition application device according to one embodiment of the present application, the mixer unit may include a collection unit fluidly connected to the first connection pipe and the second connection pipe, and a mixing unit fluidly connected to the collection unit and including a screw device.

[0020] In a resin composition application device according to one embodiment of the present application, at least one application tube includes an inlet portion and a flow portion, and the inlet portion is arranged to at least partially overlap the mixer portion, connecting the mixer portion and the flow portion so that the resin composition flows, and may have a shape in which a cross-sectional area through which the resin composition passes gradually decreases from an end portion on the mixer portion side to an end portion on the flow portion side.

[0021] In a resin composition application device according to one embodiment of the present application, the cross-sectional area of ​​each point through which the resin composition passes may be continuously constant based on the direction in which the resin composition flows.

[0022] In a resin composition application device according to one embodiment of the present application, the flow portion may include a bending portion provided in at least a portion of the area to change the direction of movement of the resin composition.

[0023] In a resin composition application device according to one embodiment of the present application, the bending portion may be bent 5 times or less.

[0024] In a resin composition application device according to one embodiment of the present application, the flow section further includes a storage section provided in a portion of the area to reduce the movement speed of the resin composition, and the storage section may have a cross-sectional area at each point through which the resin composition passes based on the direction in which the resin composition flows, which may be larger than the cross-sectional area at each point through which the resin composition passes in an area other than the storage section.

[0025] In a resin composition application device according to one embodiment of the present application, the difference in inclination angle between the first side and the second side may be 10 degrees or less.

[0026] In a resin composition application device according to one embodiment of the present application, the first side and the second side may be configured to gradually narrow toward the discharge end of the resin composition to form a nozzle structure.

[0027] In a resin composition application device according to one embodiment of the present application, the discharge portion has a discharge hole for discharging the resin composition to the outside, and the discharge hole may have a rectangular shape so that the resin composition is applied to the surface.

[0028] In a resin composition application device according to one embodiment of the present application, the discharge hole may be formed such that the width in the second direction, which is the movement direction of the composition application device, is smaller than the width in the first direction perpendicular to the second direction.

[0029] In a resin composition application device according to one embodiment of the present application, the resin composition may be a viscous composition having a viscosity of 10,000 cP or more measured at 25°C.

[0030] In a resin composition application device according to one embodiment of the present application, the application unit includes a case surrounding at least a portion of the application pipe and the discharge unit, and the case may include an outer portion and a buffer portion provided on the inside of the outer portion.

[0031] In a resin composition application device according to one embodiment of the present application, the inclination angle of the first surface may be smaller than or equal to the inclination angle of the second surface.

[0032] A resin composition application device according to one embodiment of the present application includes a cartridge section, a mixer section connected to the cartridge section, and an application section connected to the mixer section, wherein the application section includes at least one application pipe through which a resin composition introduced from the mixer section can pass, a discharge section including a storage space through which a resin composition introduced from the at least one application pipe is accumulated, and a case surrounding at least a portion of the application pipe and the discharge section, wherein the case includes an inclined section, and the inclined section can have a predetermined inclination angle with respect to a surface to be applied.

[0033] In a resin composition application device according to one embodiment of the present application, the discharge portion includes a first surface and a second surface facing each other to form a storage space and each surface having a predetermined inclination angle with respect to a surface on which the resin composition is to be applied, the inclination angle of the first surface being smaller than or equal to the inclination angle of the second surface, and the predetermined inclination angle of the inclined portion may be smaller than the inclination angle of the second surface.

[0034] In a resin composition application device according to one embodiment of the present application, the case may include a plurality of inclined portions.

[0035] A battery assembly according to one embodiment of the present application may be a battery module or a battery pack. The battery assembly may include a housing having a mounting surface, a laminated battery disposed on the mounting surface, and a resin composition interposed between the mounting surface and the laminated battery to bond the housing and the laminated battery, wherein a ratio of a difference between a maximum thickness of the resin composition and an average thickness to an average thickness of the cured resin composition between the housing and the laminated battery may be within 5%, and a ratio of a difference between a minimum thickness of the resin composition and an average thickness to an average thickness of the resin composition may be within 5%.

[0036] The present application can shorten the time required for applying a resin composition and reduce the process tact time. The present application can protect a device from impact when applying a resin composition and minimize shaking during application.

[0037] The present application can provide a method for manufacturing a battery assembly (or, battery module, battery pack) using an improved resin composition application device and a battery assembly (or, battery module, battery pack) manufactured thereby.

[0038] The drawings shown in this application are according to an embodiment of this application, and the ratio of the width, width, or thickness (or height) of each component is for the purpose of explaining this application in detail, and these ratios may differ from the actual ones. In addition, in the coordinate system shown in the drawings, each axis may be perpendicular to each other, and the direction pointed by the arrow may be the + direction, and the direction opposite to the direction pointed by the arrow (i.e., the direction rotated by 180 degrees) may be the - direction.

[0039] FIG. 1 is a perspective view illustrating at least a portion of a resin composition application device according to one embodiment of the present application.

[0040] FIG. 2 is a plan view illustrating at least a portion of a mixer section of a resin composition application device according to one embodiment of the present application.

[0041] FIG. 3 is a plan view illustrating at least a portion of an application section of a resin composition application device according to one embodiment of the present application.

[0042] FIG. 4 is a perspective view illustrating at least a portion of a resin composition application device according to one embodiment of the present application.

[0043] FIG. 5 is a plan view illustrating at least a portion of an application section of a resin composition application device according to one embodiment of the present application.

[0044] FIG. 6 is a perspective view illustrating at least a portion of a resin composition application device according to one embodiment of the present application.

[0045] Fig. 7 is a plan view showing at least a portion of the application portion in Fig. 6.

[0046] FIG. 8 is a plan view illustrating at least a portion of an application section of a resin composition application device according to one embodiment of the present application.

[0047] FIG. 9 is a plan view illustrating at least a portion of an exhaust hole of a resin composition application device according to one embodiment of the present application.

[0048] FIG. 10 is a plan view illustrating at least a portion of an application section of a resin composition application device according to one embodiment of the present application.

[0049] FIG. 11 is a perspective view illustrating at least a portion of a resin composition application device according to one embodiment of the present application.

[0050] Fig. 12 is a perspective view showing a process of applying a resin composition using a resin composition applying device according to one embodiment of the present application.

[0051] FIG. 13 and FIG. 14 are perspective views showing a process of applying a resin composition to a housing using a resin composition application device according to one embodiment of the present application.

[0052] FIG. 15 is a schematic exploded perspective view schematically illustrating a battery pack according to one embodiment of the present application.

[0053] FIG. 16 is a schematic enlarged view illustrating a portion (e.g., portion R) of the battery pack of FIG. 15.

[0054] Figure 17 is a top view showing the top view of Figure 16.

[0055] Fig. 18 is a side cross-sectional view taken along line PP' of Fig. 18.

[0056] FIG. 19 is an exploded perspective view schematically illustrating a battery module according to one embodiment of the present application.

[0057] Figure 20 is a top view showing the top view of Figure 19.

[0058] Fig. 21 is a cross-sectional view taken along line QQ' of Fig. 20.

[0059] Before proceeding with a detailed description of this application, it should be noted that terms and words used in this specification and claims may not be interpreted solely based on their conventional or dictionary meanings. Furthermore, inventors should interpret terms and concepts in accordance with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention. The embodiments described in this specification and the configurations depicted in the drawings represent only the most preferred embodiments of this application and may not represent the entire technical spirit of this application. Therefore, various equivalents and variations may exist at the time of filing of this application.

[0060] The same reference numbers or symbols in each drawing attached to this specification may indicate parts or components that perform substantially the same functions. For convenience of explanation and understanding, the same reference numbers or symbols may be used in different embodiments. In other words, even if components with the same reference numbers are depicted in multiple drawings, they may not all represent a single embodiment.

[0061] In the following description, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as "comprise" or "comprises" are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but are to be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0062] In addition, in the description below, expressions such as upper, upper, lower, lower, side, front, and rear are expressed based on the direction shown in the drawing, and may be expressed differently if the direction of the object is changed.

[0063] Additionally, terms including ordinal numbers, such as "first," "second," etc., may be used in this specification and claims to distinguish between components. These ordinal numbers may be used to distinguish identical or similar components from each other, and the use of these ordinal numbers should not be interpreted in a limited manner. For example, components associated with these ordinals should not be interpreted in a restricted manner, such as in the order of use or arrangement, based on their numbers. If necessary, each ordinal number may be used interchangeably.

[0064] In this specification, the term "battery" may be used interchangeably with "cell." Furthermore, "battery" or "cell" may collectively refer to a battery cell, a battery assembly including a battery cell, a battery module, or a battery pack.

[0065] In this specification, application means wetting the surface of an object to be applied with a substance to be applied, and this can be distinguished from injection, which fills the interior of an object having a volume.

[0066] Hereinafter, embodiments of the present application will be described in detail with reference to the attached drawings. However, the scope of the present application may not be limited to the presented embodiments. For example, those skilled in the art who understand the scope of the present application may propose other embodiments within the scope of the present application by adding, modifying, or deleting components, but such embodiments will also be considered within the scope of the present application. The shapes and sizes of elements in the drawings may be exaggerated for clarity.

[0067] FIG. 1 is a perspective view illustrating at least a portion of a resin composition application device (10) according to one embodiment of the present application. The resin composition application device (10) can apply a resin composition (e.g., a resin composition (40) of FIG. 4) to at least one surface of a housing (e.g., a housing (50) of FIG. 13) that accommodates a battery or to at least a portion of at least one surface of a battery. Here, a battery may be a term encompassing a battery cell, a battery assembly, a battery module, and a battery pack. That is, a battery may include at least one selected from the group consisting of a battery cell, a battery assembly, a battery module, and a battery pack. Specifically, the resin composition application device (10) can apply a resin composition (e.g., a resin composition (40) of FIG. 4) to one surface of a component inside a battery.

[0068] The present application can provide a resin composition application device (10) that can shorten the time required for applying a resin composition (40) and reduce the process tact time. The present application can protect the device from impact when applying a resin composition (40) and minimize shaking during application.

[0069] A resin composition application device (10) according to one embodiment of the present application may include a cartridge unit (100). There may be one or more cartridge units (100).

[0070] The cartridge unit (100) may include, in one example, a first cartridge unit (110) that accommodates a subject composition forming a resin composition (40) and a second cartridge unit (120) that accommodates a curing agent composition. The cartridge unit (100) may use a known cartridge without particular limitation as long as it can accommodate the subject composition or the curing agent composition. The first cartridge unit (110) may be connected to the mixer unit (200) via a first connecting pipe (111) so as to be fluidly connected. The second cartridge unit (120) may be connected to the mixer unit (200) via a second connecting pipe (121) so as to be fluidly connected. The term "fluid connection" used herein means that they are connected to each other so that a fluid can flow.

[0071] The first connecting pipe (111) and the second connecting pipe (121) may be configured so that they are not connected to each other, thereby preventing the subject composition and the curing agent composition from mixing internally. In addition, the first connecting pipe (111) and the second connecting pipe (121) may each have a passage provided internally to allow the subject composition or the curing agent composition to pass therethrough.

[0072] In the present application, the resin composition (40) may be a curable composition. The resin composition (40) may include at least one selected from the group consisting of silicone resin, acrylic resin, urethane resin, and epoxy resin. The resin composition (40) may include a main composition and a curing agent composition. The resin composition (40) may be cured by a chemical reaction between the main composition and the curing agent composition. The resin composition (40) may be cured to form a cured product.

[0073] The subject composition may include a subject resin. The subject resin may include, for example, one or more selected from the group consisting of a silicone resin, an acrylic resin, a polyol resin, and an epoxy resin. In addition, the subject composition may further include a filler to secure higher thermal conductivity and thereby improve heat dissipation performance. In order to secure excellent heat dissipation performance and miscibility, the subject composition may include the filler in a range of 80 wt% to 95 wt%, 82 wt% to 94 wt%, or 84 wt% to 92 wt% based on the total weight. Meanwhile, the subject composition may be a viscous composition. In the present specification, the viscous composition may mean a composition having a viscosity of 10,000 cP or more measured at a point of 2.4 / s when measured using a Brookfield HB type viscometer at 25°C in a shear rate range of 0.01 / s to 10.0 / s. In addition, in the present specification, viscosity may mean the viscosity measured at a point of 2.4 / s when measured in a shear rate range of 0.01 / s to 10.0 / s using a Brookfield HB type viscometer at 25°C as described above. Specifically, the subject composition can have a viscosity within the range of 20,000 cP to 1,000,000 cP, 30,000 cP to 900,000 cP, 40,000 cP to 800,000 cP, 50,000 cP to 700,000 cP, 60,000 cP to 600,000 cP, 70,000 cP to 500,000 cP, 80,000 cP to 400,000 cP, 90,000 cP to 300,000 cP or 100,000 cP to 200,000 cP.

[0074] The curing agent composition may include a curing agent. The curing agent may be determined depending on the base resin. For example, if the base resin is a silicone resin, the curing agent may be a siloxane compound. If the base resin is a polyol resin or an acrylic resin, the curing agent may be an isocyanate compound. If the base resin is an epoxy resin, the curing agent may be an amine compound. In addition, the curing agent composition may further include a filler to secure higher thermal conductivity and thereby improve heat dissipation performance. In order to secure excellent heat dissipation performance and miscibility, the curing agent composition may include the filler in a range of 75 wt% to 92 wt%, 78 wt% to 90 wt%, or 80 wt% to 89 wt% based on the total weight. Meanwhile, the curing agent composition may be a viscous composition. Specifically, the curing agent composition can have a viscosity within the range of 20,000 cP to 1,000,000 cP, 30,000 cP to 900,000 cP, 40,000 cP to 800,000 cP, 50,000 cP to 700,000 cP, 60,000 cP to 600,000 cP, 70,000 cP to 500,000 cP, 80,000 cP to 400,000 cP, 90,000 cP to 300,000 cP, or 100,000 cP to 200,000 cP.

[0075] The resin composition (40) may further include a filler to improve heat dissipation performance by securing higher thermal conductivity upon curing. To secure excellent heat dissipation performance, the resin composition (40) may include the filler in a range of 80 wt% to 95 wt%, 82 wt% to 92 wt%, or 84 wt% to 91 wt% relative to the total weight. As described above, the resin composition (40) may include a main composition including a filler and a curing agent composition, thereby enabling curing and securing excellent heat dissipation performance.

[0076] The filler may be a thermally conductive inorganic filler. For example, the thermally conductive inorganic filler may include ceramic particles such as alumina, aluminum nitride, boron nitride, silicon carbide, silicon nitride, beryllium oxide, zinc oxide, aluminum hydroxide, or boehmite. In addition, the resin composition (40) may include graphite or the like to secure higher insulation properties upon curing, and may further include fumed silica, clay, or calcium carbonate.

[0077] The resin composition (40) may further include additives to ensure processability, if necessary. For example, the additives may include a thixotropic agent, a diluent, a dispersant, a surface treatment agent, a plasticizer, or a coupling agent, and in some cases, if flame retardancy is required, a flame retardant may be further included.

[0078] The resin composition (40) may have a specific gravity of 2.8 or less, 2.7 or less, 2.6 or less, 2.5 or less, or 2.4 or less as measured according to ASTM D 4052. The resin composition (40) may have a time for doubling the viscosity (2x viscosity time) when left at room temperature and pressure of 40 minutes or more, 45 minutes or more, 50 minutes or more, 55 minutes or more, or 60 minutes or more. The time for doubling the viscosity when left (2x viscosity time) can be measured using, for example, a viscosity measuring device. The resin composition (40) having a specific gravity in the above-mentioned range is more suitable for a shaving cloth and can make the management of the resin composition application device (10) easier.

[0079] The cartridge unit (100) may, in one example, contain a resin composition (40) in which a subject composition and a curing agent composition are mixed, or which is a curable composition in itself. That is, the cartridge unit (100) may be provided as a single unit without distinction between the first cartridge unit (110) and the second cartridge unit (120). In addition, the cartridge unit (100) may be connected to the mixer unit (200) by a connecting pipe (not shown) so as to be fluidly connected. Hereinafter, for features regarding the connecting pipe, reference may be made to the description regarding the first connecting pipe (111) or the second connecting pipe (121).

[0080] The cartridge unit (100) may further include a pressurizing device (not shown). The pressurizing device may allow the subject composition or curing agent composition contained in the cartridge unit (100) to smoothly move to the mixer unit (200) through the first connecting pipe (111) or the second connecting pipe (121). In addition, the pressurizing device may allow the resin composition (40) contained in the cartridge unit (100) to move to the mixer unit (200) through the connecting pipe. Meanwhile, the cartridge unit (100) may use gravity to move the subject composition or curing agent composition to the mixer unit (200) without the pressurizing device.

[0081] At least one of the first connecting pipe (111) and the second connecting pipe (121) may further include at least one opening / closing device (not shown). The opening / closing device is not particularly limited as long as it can control the movement of the subject composition or the curing agent composition passing through the first connecting pipe (111) or the second connecting pipe (121). For example, the opening / closing device may be a valve or the like. The position of the opening / closing device is not particularly limited as long as the movement of the subject composition or the curing agent composition can be appropriately controlled. For example, the first connecting pipe (111) and the second connecting pipe (121) may each further include an opening / closing device, and it may be more efficient in terms of movement control if each opening / closing device is provided at a position where the first connecting pipe (111) and the mixer unit (200) are in contact and at a position where the second connecting pipe (121) and the mixer unit (200) are in contact. Additionally, as an example, an opening / closing device may be provided between the first connecting pipe (111) and the first cartridge section (110) and between the second connecting pipe (121) and the second cartridge section (120).

[0082] A resin composition application device (10) according to one embodiment of the present application may include a mixer unit (200). As described above, the cartridge unit (100) and the mixer unit (200) may be connected. There may be one or more mixer units (200), and the number of mixer units (200) may be determined according to the number of cartridge units (100). For example, if there are two cartridge units (100), two mixer units (200) may be provided, and one mixer unit (200) may be fluidly connected to each cartridge unit (100).

[0083] The mixer unit (200) can mix the main composition and the curing agent composition, etc. The mixer unit (200) may have a passage provided therein so that the main composition and the curing agent composition, etc. can pass through, and the main composition and the curing agent composition, etc. can be mixed while passing through the passage of the mixer unit (200). The main composition and the curing agent composition, etc. can be formed into a resin composition (40) while passing through the mixer unit (200).

[0084] Meanwhile, the subject composition and the curing agent composition may be viscous compositions, and the resin composition (40) may also be a viscous composition. In addition, unless specifically specified, the resin composition (40) may be in a state prior to curing. Meanwhile, the resin composition (40) has a viscosity of 20,000 cP to 1,000,000 cP, 30,000 cP to 950,000 cP, 40,000 cP to 900,000 cP, 50,000 cP to 850,000 cP, 60,000 cP to 800,000 cP, 70,000 cP to 750,000 cP, 80,000 cP to 700,000 cP, 90,000 cP to 650,000 cP, 100,000 cP to 600,000 cP, 110,000 cP to 550,000 cP, 120,000 cP to 500,000 cP, 130,000 cP to 450,000 cP, 140,000 cP to 400,000 cP, 150,000 cP to 350,000 cP or 160,000 cP to 300,000 cP.

[0085] FIG. 2 is a plan view showing at least a portion of a mixer section (200) of a resin composition application device (10) according to one embodiment of the present application.

[0086] The mixer unit (200) may include a collection unit (210) fluidly connected to a first connection pipe (111) and a second connection pipe (121). In addition, the mixer unit (200) may include a mixing unit (220) fluidly connected to the collection unit (210) and supplied with a main composition and a curing agent composition from the collection unit (210) and mixed therewith. In addition, the mixer unit (200) may form a resin composition (40) by passing the main composition and the curing agent composition through the mixing unit (220), and may include an outlet (230) fluidly connected to the application unit (300) so as to supply the formed resin composition (40) to the application unit (300) to be described later. The outlet (230) may have a funnel shape so that the resin composition (40) may be smoothly discharged, and for example, the width in the x-axis direction may decrease as it gets closer to the point where the resin composition (40) is discharged.

[0087] The mixing unit (220) of the mixer unit (200) may include a screw device (221) that transports, divides, and mixes the main composition and the curing agent composition, etc. The screw device (221) may be built into the mixing unit (220) and may be positioned across an area fluidly connected to the collecting unit (210). The mixer unit (200) is not particularly limited in type as long as the main composition and the curing agent composition, which are viscous compositions, pass therethrough to form a resin composition (40). The mixer unit (200) may be, for example, a static mixer or a dynamic mixer. A static mixer is a mixer that enables mixing by the flow of the mixing target itself, and a dynamic mixer means a mixer that mixes the mixing target by receiving a driving force. That is, the screw device (221) may have the form of a static mixer or a dynamic mixer.

[0088] It is preferable that the mixer unit (200) form the resin composition (40) so as not to affect the quality, such as the curing state or flowability. To this end, the mixer unit (200) may be a static mixer capable of mixing at the flow rate of the fluid itself. That is, the screw device (221) may have the form of a static mixer.

[0089] The screw device (221) may include one or more elements (222), and preferably may include a plurality of elements (222). The number of elements (222) is not particularly limited, but may be such that the resin composition (40) is formed without affecting the quality such as the curing state or flowability, has excellent mixing properties, and does not cause a decrease in the process speed, and may be, for example, 25 or less. One element (222) may form one stage (B), and the number of stages (B) (the number of stages) may be determined depending on the number of elements (222).

[0090] The screw device (221) may include a plurality of elements (222a, 222b) having different shapes. For example, referring to FIG. 2, the screw device (221) may include a first element (222a) and a second element (222b) having different shapes.

[0091] The screw device (221) may include a structure in which elements (222a, 222b) of different shapes are repeatedly connected. For example, referring to FIG. 2, the screw device (221) has a structure in which a first element (222a) and a second element (222b) are repeatedly connected. In addition, the screw device (221) has a structure in which elements (222a, 222b) of different shapes are repeatedly connected, but the connection angles may be different. The screw device (221) may be designed to form a resin composition (40) without affecting quality such as a curing state or flowability, and to have excellent mixing properties and not cause a decrease in process speed.

[0092] Meanwhile, the screw device (221) may include three or more elements (222) having different shapes.

[0093] A resin composition application device (10) according to one embodiment of the present application may include an application unit (300). As described above, the mixer unit (200) and the application unit (300) may be connected. The resin composition (40) formed while passing through the mixer unit (200) may flow into the application unit (300).

[0094] FIG. 3 is a plan view illustrating at least a portion of an application unit (300) of a resin composition application device (10) according to an embodiment of the present application. FIG. 4 is a perspective view illustrating at least a portion of a resin composition application device (10) according to an embodiment of the present application. FIG. 5 is a plan view illustrating at least a portion of an application unit (300) of a resin composition application device (10) according to an embodiment of the present application. FIG. 6 is a perspective view illustrating at least a portion of a resin composition application device (10) according to an embodiment of the present application. FIG. 7 is a plan view illustrating at least a portion of the application unit (300) in FIG. 6. FIG. 8 is a plan view illustrating at least a portion of the application unit (300) of a resin composition application device (10) according to an embodiment of the present application. FIG. 9 is a plan view illustrating at least a portion of an exhaust hole (321) of a resin composition application device (10) according to an embodiment of the present application.

[0095] The application unit (300) may include at least one application pipe (310) provided to allow the resin composition (40) introduced from the mixer unit (200) to pass therethrough. Meanwhile, in the case where there are multiple mixer units (200), the application pipes (310) may also be provided in a number corresponding to the number of mixer units (200). Each of the mixer units (200) may be fluidly connected to the application pipe (310) in a one-to-one correspondence.

[0096] For example, referring to FIG. 4, the resin composition application device (10) may include a plurality of mixer sections (200), and the number of application pipes (310) may be provided in a plurality corresponding to the number of mixer sections (200). Referring to FIG. 6, the resin composition application device (10) may include one mixer section (200), and the number of application pipes (310) may be provided in a single unit corresponding to the number of mixer sections (200).

[0097] The application unit (300) may include a connection unit (330) that fluidly connects them at a position in contact with the mixer unit (200).

[0098] The application pipe (310) may include an inlet portion (311) provided in the connection portion (330). Specifically, the inlet portion (311) may be a part of the application pipe (310). The inlet portion (311) may be arranged to at least partially overlap the mixer portion (200). The inlet portion (311) may connect the mixer portion (200) and the flow portion (312) described below so that the resin composition (40) flows. Here, the connection may be a fluid connection.

[0099] The inlet (311) may have a shape in which the cross-sectional area through which the resin composition (40) passes gradually decreases from the inlet to the outlet based on the direction in which the resin composition (40) flows. For example, the inlet (311) may have a funnel shape. Through this shape, the resin composition (40) formed in the mixer (200) can be easily introduced.

[0100] Specifically, the inlet section (311) may have a shape in which the cross-sectional area through which the resin composition (40) passes gradually decreases from the end on the side of the mixer section (200) to the end on the side of the flow section (312) described later.

[0101] The application pipe (310) may include a flow portion (312) other than the inlet portion (311). The flow portion (312) may have a cross-sectional area at each point through which the resin composition (40) passes, based on the direction in which the resin composition (40) flows. This may help uniform application by allowing the resin composition (40) to flow at a constant moving speed and pressure. Here, a constant cross-sectional area means that it is substantially constant, and being substantially constant may mean that the difference is 10% or less. In addition, the cross-sectional area of ​​the flow portion (312) in the present specification may mean a cross-sectional area at each point through which the resin composition (40) passes, based on the direction in which the resin composition (40) flows.

[0102] The flow portion (312) may have a pipe shape. In addition, the pipe-shaped flow portion (312) may have an appropriately sized diameter (d) so as not to interfere with the flow of the resin composition (40), which is a viscous composition. R ) can have a diameter (d) of the pipe-shaped flow portion (312) R ) can be determined depending on the viscosity and discharge speed of the resin composition (40), and its value is not particularly limited.

[0103] The flow portion (312) may include a bend portion (312a) provided in at least a portion of the flow portion to change the direction of movement of the introduced resin composition (40). The bend portion (312a) may help reduce the movement speed of the resin composition (40), which is a viscous composition, by changing the direction of movement, and may help to accumulate the resin composition (40) to a certain extent due to the reduced speed, and to help to uniformly apply the resin composition (40) through the accumulated resin composition (40). If the flow portion (312) does not have the bend portion (312a) (i.e., has a straight shape), there is a possibility that a large or small amount of the resin composition (40) may suddenly move to the discharge portion (320) due to its viscosity, which may result in uneven application. The bend portion (312a) may help to uniformly apply the resin composition (40) by preventing it from moving to the discharge portion (320) in an irregular amount due to its viscosity.

[0104] If the bending portion (312a) is bent a large number of times, it may be difficult for the resin composition (40), which is a viscous composition, to pass through the bending portion (312a). Therefore, the bending portion (312a) may be bent a predetermined number of times or less. For example, the bending portion (312a) may be bent 5 times or less, 4 times or less, or 3 times or less. For example, as illustrated in FIG. 3, the bending portion (312a) may have a form in which it is bent twice.

[0105] Meanwhile, referring to FIG. 8, the flow section (312) may include a storage section (312b) provided in some areas to reduce the movement speed of the introduced resin composition (40). The storage section (312b) may be configured to have a cross-sectional area (e.g., S) of each point through which the resin composition (40) passes based on the direction in which the resin composition (40) flows. P312b ) is the cross-sectional area of ​​each point through which the resin composition (40) passes in an area other than the storage unit (312b) (for example, S P312x , S p312y ) can be greater than.

[0106] The flow section (312) may include a storage section (312b) and passage sections (312x, 312y) which are areas other than the storage section (312b). The storage section (312b) may have a cross-sectional area (for example, S) of each point through which the resin composition (40) passes based on the direction in which the resin composition (40) flows. P312b ) is the cross-sectional area (for example, S) of each point through which the resin composition (40) passes based on the direction in which the resin composition (40) of the passage (312x, 312y) flows. P312x , S p312y ) can be greater than.

[0107] The shape of the storage unit (312b) is not particularly limited, but may have a shape in which the cross-sectional area of ​​each point through which the resin composition (40) passes gradually increases and then decreases based on the direction in which the resin composition (40) flows. This shape may be advantageous in reducing the movement speed of the resin composition (40) and not interrupting the flow. When the storage unit (312b) has the shape described above, the maximum cross-sectional area (S) among the cross-sectional areas of each point through which the resin composition (40) passes based on the direction in which the resin composition (40) flows P312b ) can be provided. This maximum cross-sectional area (S P312b ) is the cross-sectional area (for example, S) of each point through which the resin composition (40) passes based on the direction in which the resin composition (40) of the passage (312x, 312y) flows. P312x , S p312y ) may be about 1.2 to 2 times or 1.3 to 1.6 times the maximum cross-sectional area (S) of the storage unit (312b). P312b ) is adjusted within the aforementioned range, it is possible to prevent the resin composition (40) from moving in an irregular amount, thereby helping in uniform application, and to secure appropriate fairness by preventing the resin composition (40) from accumulating excessively in the storage unit (312b).

[0108] The location of the storage unit (312b) is not particularly limited, but it may be advantageous to be located between a plurality of passages (312x, 312y) so as to reduce the movement speed of the resin composition (40) and not to interrupt the flow. Meanwhile, the plurality of passages (312x, 312y) may include a first passage (312x) located at the rear of the storage unit (312b) and a second passage (312y) located at the front of the storage unit (312b) based on the direction in which the resin composition (40) flows. The shape and size of the first passage (312x) and the second passage (312y) may be different, but it may be preferable that they are the same for smooth movement of the resin composition (40). That is, the cross-sectional area (S) of the first passage (312x) P312x ) and the cross-sectional area (S) of the second passage (312y) p312y ) may be the same.

[0109] In addition, the first passage part (312x) and the second passage part (312y) may each have a constant cross-sectional area in at least some areas. Specifically, the first passage part (312x) may have a continuously constant cross-sectional area at each point through which the resin composition (40) passes based on the direction in which the resin composition (40) flows in at least some areas. In addition, the second passage part (312y) may also have a continuously constant cross-sectional area at each point through which the resin composition (40) passes in at least some areas based on the direction in which the resin composition (40) flows in at least some areas.

[0110] The application unit (300) may include a discharge unit (320) for applying a resin composition (40). The discharge unit (320) may be provided inside the application unit (300) and may include a storage space in which the resin composition (40) introduced from the application pipe (310) may be accumulated.

[0111] The discharge portion (320) can reduce the movement speed of the resin composition (40) flowing from the application pipe (310) by increasing the cross-sectional area through which the resin composition (40) passes through the storage space compared to the flow portion (312) of the application pipe (310).

[0112] Since the speed at which the resin composition (40) flows into the discharge unit (320) from the application pipe (310) is greater than the speed at which the resin composition (40) flows out from the discharge unit (320), the discharge unit (320) can reduce the movement speed of the resin composition (40) flowing in from the application pipe (310) and cause the resin composition (40) to accumulate in the storage space.

[0113] The discharge unit (320) includes a storage space, thereby preventing the problem of the resin composition (40) flowing in from the application pipe (310) being suddenly discharged to the outside in a large or small amount due to viscosity, thereby helping in uniform application.

[0114] The discharge unit (320) is fluidly connected to the application pipe (310). Specifically, the discharge unit (320) may be directly fluidly connected to the flow unit (312). That is, the resin composition (40) may reach the discharge unit (320) through the application pipe (310) and be discharged to the outside through the discharge unit (320) and applied.

[0115] The discharge unit (320) may be provided with a discharge hole (321) that allows the resin composition (40) to be discharged to the outside of the resin composition application device (10). The discharge hole (321) may have a rectangular shape so that the resin composition (40) can be shaving cloth. The discharge hole (321) may be formed so that the width in the second direction, which is the moving direction of the resin composition application device (10), is smaller than the width in the first direction perpendicular to the second direction. When the discharge unit (320) moves in the second direction while the discharge hole (321) is in contact with the surface to be applied and the resin composition (40) is applied to the surface to be applied, an area corresponding to the width in the longitudinal direction of the rectangular shape can be applied simultaneously.

[0116] For example, referring to Fig. 9, the exhaust hole (321) has a width (d) in the first direction (x-axis direction) D1 ) is the width (d) in the second direction (y-axis direction) perpendicular to the first direction D2 ) can be formed larger than that.

[0117] Meanwhile, the amount of resin composition (40) applied is the discharge area (A) of the discharge hole (321). D ) can be affected, and the discharge area (A) of the discharge hole (321) D ) is the width (d) in the first direction (x-axis direction) D1 ) and width (d) in the second direction (y-axis direction) D2 ) can be determined by. For example, if the discharge hole (321) is rectangular, the discharge area (A D ) is the width (d) in the first direction (x-axis direction) D1 ) and width (d) in the second direction (y-axis direction) D2 ) is the product of

[0118] Discharge area (A) of discharge hole (321) D ) can be designed to be similar to the cross-sectional area of ​​each point of the application pipe (310) through which the resin composition (40) flowing from the mixer section (200) to the application section (300) passes. Specifically, referring to FIGS. 3 and 9, the discharge area (A) of the discharge hole (321) D) is the cross-sectional area (S) of the end based on the direction in which the resin composition (40) flows in the flow portion (312) in direct contact with the discharge portion (320). 312 ) can be designed to be similar to the resin composition (40). This design can help to apply the resin composition (40) without interruption. For example, the discharge area (A) of the discharge hole (321) D ) is the cross-sectional area (S) of the end based on the direction in which the resin composition (40) flows in the flow portion (312) in direct contact with the discharge portion (320). 312 ) may be 0.8 to 1.2 times or 0.9 to 1.1 times.

[0119] In one example, there may be multiple application tubes (310). Referring to FIG. 4, the application tubes (310) may include a first application tube (310-1) and a second application tube (310-2). In addition, the first application tube (310-1) may include a first flow portion (312-1), and the second application tube (310-2) may include a second flow portion (312-2).

[0120] In one example, when there are multiple applicator tubes (310), each applicator tube (310) may be connected to a single discharge unit (320). However, this is not a limitation. Through this structure, the resin composition (40) in the shaving cloth may be prevented from being discharged in an irregular amount, thereby enabling uniform application.

[0121] In one example, when there are multiple application tubes (310), the discharge area (A) of the discharge hole (321) D ) is the cross-sectional area (S) of the end portion based on the direction in which the resin composition (40) flows in each flow portion (312) in direct contact with the discharge portion (320). 312 ) can be designed to be similar to the sum. The discharge area (A) of the discharge hole (321) D ) is the cross-sectional area (S) of the end portion based on the direction in which the resin composition (40) flows in each flow portion (312) in direct contact with the discharge portion (320). 312) may be 0.8 to 1.2 times or 0.9 to 1.1 times the agreement. In addition, for example, the discharge area (A) of the discharge hole (321) D ) is the cross-sectional area (S) of the end of the first flow section (312-1). 312-1 ) and the cross-sectional area (S) of the end of the second flow section (312-2) 312-2 ) may be similar to the sum of

[0122] Meanwhile, in one example, each of the first flow portion (312-1) and the second flow portion (312-2) may have a constant cross-sectional area in at least some areas. The first flow portion (312-1) may have a continuously constant cross-sectional area at each point through which the resin composition (40) passes based on the direction in which the resin composition (40) flows in at least some areas. In addition, the second flow portion (312-2) may also have a continuously constant cross-sectional area at each point through which the resin composition (40) passes based on the direction in which the resin composition (40) flows in at least some areas. Here, the cross-sectional area sizes of the first flow portion (312-1) and the second flow portion (312-2) may be the same or different.

[0123] In one example, the sum of the cross-sectional area of ​​the first flow section (312-1) and the cross-sectional area of ​​the second flow section (312-2) may be constant. FIG. 5 is a plan view illustrating at least a portion of the application section (300) of the resin composition application device (10) according to one embodiment of the present application. Specifically, the cross-sectional areas (S1, S2) of the first flow section (312-1) and the cross-sectional area (S) of the second flow section (312-2) are based on the direction (D) in which the resin composition (40) flows. A , S B ) can be continuously constant. For example, the cross-sectional area (S1) of the first flow section (312-1) and the cross-sectional area (S) of the second flow section (312-2) at the first point (P1) along the way (Way) along the direction (D) in which the resin composition (40) flows A) and the cross-sectional area (S2) of the first flow section (312-1) at the second point (P2) and the cross-sectional area (S) of the second flow section (312-2) B ) may be the same. That is, when there are multiple application pipes (310), the sum of the cross-sectional areas of each flow section (312) based on the direction in which the resin composition (40) flows may be continuously constant. The resin composition application device (10) can apply the resin composition (40) to the application section (300), thereby shortening the time required to apply the resin composition (40).

[0124] Meanwhile, the application unit (300) may further include an opening / closing device (not shown) that opens and closes at least part of the discharge holes (321). By closing all of the discharge holes (321) with the opening / closing device, the resin composition (40) can be prevented from being discharged to the outside, and by opening at least part of the discharge holes (321), the width of the resin composition (40) to be applied can be controlled. This opening / closing operation of the discharge holes (321) can be performed automatically or manually.

[0125] The ratio (d3 / d1) of the height (d3) of the discharge portion (320) and the width direction length (d1) of the application portion (300) is not particularly limited as long as the resin composition (40) can be discharged smoothly without suddenly discharging a large or small amount, but may be, for example, 0.1 or more to 5 or less, 0.2 or more to 4 or less, 0.3 or more to 3 or less, 0.4 or more to 2 or less, or 0.5 or more to 1 or less.

[0126] Referring to FIG. 3, the height (d3) of the discharge portion (320) may refer to the length along the z-axis direction, and the width direction length (d1) of the application portion (300) may refer to the length along the y-axis direction. The discharge portion (320) may include two surfaces (320a, 320b) to form a storage space through which the resin composition (40) passes. The two surfaces (320a, 320b) may face each other. The two surfaces (320a, 320b) may each have a predetermined inclination angle with respect to the surface to be applied independently. Here, the inclination angle may be greater than 0 degrees and less than or equal to 90 degrees.

[0127] The discharge portion (320) may include at least a first surface (320a) and a second surface (320b) forming a storage space. The first surface (320a) and the second surface (320b) may be two surfaces (320a, 320b) forming a storage space through which the aforementioned resin composition (40) passes.

[0128] Meanwhile, when the inclination angle of one of the two surfaces (320a, 320b) is 90 degrees, the inclination angle of the other surface may be an acute angle. Here, the acute angle means more than 0 degrees and less than 90 degrees. For example, referring to FIG. 3, the two surfaces (320a, 320b) facing each other to form a storage space may include a first surface (320a) having a predetermined inclination angle 'a' with respect to the surface to be applied, and a second surface (320b) having a predetermined inclination angle 'b' with respect to the surface to be applied. Here, when the inclination angle 'b' of the second surface (320b) is 90 degrees, the inclination angle 'a' of the first surface (320a) may be an acute angle.

[0129] That is, the discharge portion (320) may have an inclined structure. The inclined structure of the discharge portion (320) can prevent the resin composition (40) from being discharged in an irregular amount to the discharge portion (320) due to viscosity, thereby enabling uniform application.

[0130] The inclination angles of the two faces (320a, 320b) that face each other to form the storage space of the discharge portion (320) may have a predetermined difference. The difference in the inclination angles of the two faces (320a, 320b) may be 10 degrees or less, 9 degrees or less, 8 degrees or less, 7 degrees or less, 6 degrees or less, or 5 degrees or less. In this case, the gap between the two faces (320a, 320b) may be configured to increase or decrease as it moves toward the discharge end.

[0131] In one embodiment, the difference in inclination angles of the two faces (320a, 320b) may include 0 degrees, in which case the inclination angles of the two faces (320a, 320b) may mean that they are equal to each other. In this case, the inclination angles of the two faces (320a, 320b) may both be acute angles.

[0132] In one embodiment, the ratio (b / a) of the inclination angle 'b' of the second surface (320b) among the two surfaces (320a, 320b) facing each other to form a storage space and the inclination angle 'a' of the second surface (320b) may be 1 to 2, 1.01 to 1.9, 1.02 to 1.8, 1.03 to 1.7, 1.04 to 1.6, 1.05 to 1.5, 1.06 to 1.4, 1.07 to 1.3, or 1.08 to 1.2. When the above-mentioned ratio (b / a) satisfies this, it may be more advantageous to uniformly perform shaving by continuously discharging the resin composition (40) accumulated in the storage space.

[0133] Meanwhile, the two surfaces (320a, 320b) facing each other to form a storage space of the discharge portion (320) may be configured to gradually narrow toward the discharge end of the resin composition (40) (i.e., toward the discharge hole (321)), thereby forming a nozzle structure. This nozzle structure of the discharge portion (320) may enable the resin composition (40) to be discharged without interruption through the discharge hole (321).

[0134] Specifically, a space may be formed between one end of the first surface (320a) and one end of the second surface (320b). The space may be formed at the end of the nozzle structure described above. The resin composition (40) may be configured to be discharged to the outside through the space formed between one end of the first surface (320a) and one end of the second surface (320b).

[0135] Among the two surfaces (320a, 320b) that face each other to form a storage space of the discharge portion (320), the first surface (320a) may be relatively closer to the outside of the resin composition application device (10) than the second surface (320b). Here, the inclination angle (i.e., 'a') of the first surface (320a) may be smaller than or equal to the inclination angle (i.e., 'b') of the second surface (320b). This structure may be advantageous in discharging the resin composition (40), which is a viscous composition, without interruption since the discharge end side has a nozzle structure shape, and may ultimately be advantageous in uniformly applying the resin composition (40). On the other hand, it is also possible for the inclination angle (i.e., 'a') of the first surface (320a) to be formed larger than the inclination angle (i.e., 'b') of the second surface (320b).

[0136] The application unit (300) may include a case (340) that surrounds at least a portion of the application tube (310) and the discharge unit (320). The case (340) may include an outer portion and a buffer portion (350) provided on the inner side of the outer portion.

[0137] The outer portion of the case (340) can prevent the application tube (310) and the discharge unit (320) from being damaged by external impact. The case (340) can provide a buffer portion (350) between the application tube (310) and the outer portion and between the discharge unit (320) and the outer portion at least in a portion thereof. In various embodiments, the buffer portion (350) can be formed of an empty space or filled with an elastic material. The buffer portion (350) can protect the application tube (310) and the discharge unit (320) from external impact while minimizing shaking of the discharge unit (320) when applying the resin composition (40). The elastic material filled in the buffer portion (350) can include, for example, a urethane resin.

[0138] The case (340) may include an inclined portion. The inclined portion of the case (340) may have a predetermined inclination angle (c) with respect to the surface to be applied. Like the discharge portion (320), the case (340) includes an inclined portion having a predetermined inclination angle (c) with respect to the surface to be applied, thereby enabling the resin composition (40) to be uniformly applied while minimizing shaking. Here, the inclination angle (c) may be greater than 0 degrees and less than 90 degrees, or greater than 0 degrees and less than 90 degrees.

[0139] In addition, the predetermined inclination angle (c) of the inclined portion of the case (340) can be designed in consideration of the height (d3) of the discharge portion (320) and the widthwise length (d2) of the application portion (300) that does not contact the surface to be applied. Here, referring to FIG. 3, the height (d3) of the discharge portion (320) refers to the length along the z-axis direction, and the widthwise length (d2) of the application portion (300) that does not contact the surface to be applied can refer to the length along the y-axis direction. That is, the predetermined inclination angle (c) of the inclined portion of the case (340) can be designed in consideration of the respective inclination angles (a, b) of the two surfaces (320a, 320b) that face each other to form a storage space of the discharge portion (320).

[0140] The predetermined inclination angle (c) of the inclined portion of the case (340) may be smaller than or equal to the inclination angle (a, b) of at least one of the two faces (320a, 320b) that face each other to form the storage space of the discharge portion (320) in order to uniformly apply the resin composition (40) while minimizing shaking. Specifically, for example, the predetermined inclination angle (c) of the inclined portion of the case (340) may be equal to the inclination angle (i.e., 'a') of the first face (320a) of the two faces (320a, 320b) that form the storage space of the discharge portion (320). In addition, the predetermined inclination angle (c) of the inclined portion of the case (340) may be smaller than the inclination angle (i.e., 'b') of the second face (320b) of the two faces (320a, 320b) that form the storage space of the discharge portion (320). As another example, the predetermined inclination angle (c) of the case (340) may be configured to be smaller than the inclination angle (i.e., 'a') of the first surface (320a).

[0141] A portion of the case (340) may be in contact with the first surface (320a) of the two surfaces facing each other to form a storage space of the discharge portion (320). This may help to stably apply the resin composition (40) while minimizing shaking. Specifically, for example, the inclined portion of the case (340) may be in contact with the inclined first surface (320a), and the inclination angle (c) of the inclined portion of the case (340) may be the same as the inclination angle (i.e., 'a') of the first surface (320a).

[0142] The width (d) of the first direction (x-axis direction) of the exhaust hole (321) D1 ) may be greater than the height (d3) of the discharge portion (320). In order to stably apply the resin composition (40) in a wide band, the width (d) of the discharge hole (321) in the first direction (x-axis direction) D1 ) and the ratio (d3) of the height of the discharge part (320) D1 / d3) may be 1.5 or more and 5 or less, 1.6 or more and 4.5 or less, 1.7 or more and 4.2 or less, 1.8 or more and 4 or less, 1.9 or more and 3.5 or less, 2 or more and 3.3 or less, 2.1 or more and 3 or less, 2.3 or more and 2.95 or less, or 2.4 or more and 2.9 or less.

[0143] The discharge portion (320) has a width (d) in the first direction (x-axis direction) 320 ) may include an area that gradually increases as it moves away from the dispensing tube (310). The maximum width (d) in the first direction (x-axis direction) of the dispensing portion (320) 320 ) is the discharge hole (321) and has a width (d) in the first direction (x-axis direction). D1 ) may be the same.

[0144] The discharge unit (320) can be divided into a plurality of regions to help uniformly apply the resin composition (40), which is a viscous composition. The plurality of regions may be, for example, a width (d) in the first direction (x-axis direction) of the discharge unit (320). 320 ) can be distinguished according to the rate of change (increase rate or decrease rate). The width (d) in the first direction (x-axis direction) 320 ) may be an instantaneous rate of change. In the same area in the discharge section (320), the same width (d 320 ) can have a rate of change. Here, the same means substantially the same, and the width (d) at the first point 320 ) based on the rate of change of the width (d) at the second point, which is different from the first point 320 ) and the width (d) at the first point 320 ) may mean that the difference in the rate of change is within 5%.

[0145] Referring to Fig. 7, the discharge unit (320) may include a first discharge area (320-1) and a second discharge area (320-2). The first discharge area (320-1) may be positioned closer to the application tube (310) than the second discharge area (320-2). The width (d) of the first discharge area (320-1) in the first direction (x-axis direction) 320-1 ) is the width (d) of the first direction (x-axis direction) of the second discharge area (320-2). 320-2 ) may be shorter than the width (d) of the first direction (x-axis direction) of the first discharge area (320-1) 320-1 ) is the width (d) of the first direction (x-axis direction) of the second discharge area (320-2). 320-2 ) may be greater than the rate of change.

[0146] The maximum width (d) in the first direction (x-axis direction) of the first discharge area (320-1) 320-1 ) is the minimum width (d) in the first direction (x-axis direction) of the second discharge area (320-2). 320-2 ) or the minimum width (d) in the first direction (x-axis direction) of the second discharge area (320-2) 320-2 ) may be smaller than the maximum width (d) in the first direction (x-axis direction) of the second discharge area (320-2). 320-2 ) is the discharge hole (321) and has a width (d) in the first direction (x-axis direction). D1 ) may be the same.

[0147] The discharge portion (320) may include a boundary surface (320R) formed between a first discharge region (320-1) and a second discharge region (320-2). The boundary surface (320R) is not particularly limited, but may have, for example, a surface with a curvature greater than 0.

[0148] Fig. 10 is a plan view illustrating at least a portion of an application unit (300) of a resin composition application device (10) according to one embodiment of the present application. Fig. 11 is a perspective view illustrating at least a portion of a resin composition application device (10) according to one embodiment of the present application.

[0149] The case (340) may include a plurality of inclined portions. For example, the inclined portions of the case (340) may include a first region (341) and a second region (342). The first region (341) may have a predetermined inclined angle (c1) with respect to the surface to be applied, and the second region (342) may have a predetermined inclined angle (c2) with respect to the surface to be applied. Here, the inclined angles (c1, c2) may be greater than 0 degrees and less than 90 degrees.

[0150] The predetermined inclination angle (c1) of the first region (341) can be designed in consideration of the height (d3) of the discharge portion (320) and the widthwise length (d2) of the first region (341) that does not contact the surface to be applied. Referring to FIG. 10, the height (d3) of the discharge portion (320) refers to the length along the z-axis direction, and the widthwise length (d2) of the first region (341) that does not contact the surface to be applied can refer to the length along the y-axis direction. The predetermined inclination angle (c1) of the first region (341) can be designed in consideration of the respective inclination angles (a, b) of the two faces (320a, 320b) that face each other to form a storage space of the discharge portion (320).

[0151] The predetermined inclination angle (c2) of the second region (342) can be designed in consideration of the height (d3) of the discharge portion (320) and the widthwise length (d4) of the second region (342) that does not contact the surface to be applied. The widthwise length (d4) of the second region (342) that does not contact the surface to be applied may refer to the length along the y-axis direction. The predetermined inclination angle (c2) of the second region (342) can be designed in consideration of the predetermined inclination angle (c1) of the first region (341).

[0152] The case (340) can further minimize shaking and uniformly apply the resin composition (40) by including a plurality of inclined portions. Meanwhile, the predetermined inclination angle (c2) of the second region (342) can be equal to or smaller than the predetermined inclination angle (c1) of the first region (341). Through this, structural stability can be secured to minimize shaking of the resin composition application device (10) and can help to uniformly apply the resin composition (40). Fig. 12 is a perspective view showing a process of applying a resin composition (40) using a resin composition application device (10) according to one embodiment of the present application.

[0153] The resin composition application device (10) can move at a predetermined angle of inclination based on the applied surface. The angle of inclination of the resin composition application device (10) is an axis (A) parallel to the direction of movement. X1 ) and the vertical axis (A) of the resin composition (40) to be applied X2 ) can be determined as an angle (Θ) between the resin composition application device (10). The inclination angle (Θ) is not particularly limited as long as the resin composition (40) is smoothly applied to the surface to be applied, but in order to prevent the problem of various compositions provided in the cartridge section (100) or the like from coming off during the application process, it may be more advantageous to maintain it close to the vertical at about 80 to 90 degrees, 85 to 90 degrees, or 88 to 90 degrees.

[0154] FIG. 13 and FIG. 14 are perspective views showing a process of applying a resin composition (40) to a housing (50) using a resin composition application device (10) according to one embodiment of the present application.

[0155] The resin composition (40) that has passed through the application pipe (310) is collected in a storage space provided in the discharge unit (320), and if a sufficient amount has been collected, the resin composition (40) can be dispensed through the discharge hole (321). As the resin composition application device (10) moves in the application direction D, the resin composition (40) can be dispensed from the -D direction to the +D direction.

[0156] As described above, the resin composition application device (10) can apply the resin composition (40) to at least one surface of the housing (50) that accommodates the battery. The housing (50) may be a structure for protecting battery cells in a battery module or a battery pack from damage from external impact. The shape of the housing (50) is not particularly limited, but may be, for example, a U-shaped shape including a lower surface and two side surfaces connected to both sides of the lower surface, as shown in FIGS. 13 and 14. In addition, the housing (50) may have a mounting surface (51) on which a battery cell or the like may be mounted, and the surface on which the resin composition (40) described above is to be applied may be the mounting surface (51). Meanwhile, the housing (50) may be a structure that constitutes the outer appearance of a battery module or a battery pack, and may be used in a cell-to-pack in which one or more battery cells are mounted on the mounting surface (51).

[0157] The resin composition application device (10) can apply the resin composition (40) to the mounting surface (51) of the housing (50) while moving in the D direction. In addition, the resin composition application device (10) can repeat this to apply the resin composition (40) to the target position on the mounting surface (51).

[0158] A battery cell or the like can be fixed to a housing (50) by mounting the battery cell or the like on a mounting surface (51) to which a resin composition (40) has been applied and curing the resin composition. In this manner, a battery module or battery pack can be manufactured, and in particular, a cell-to-pack can be manufactured.

[0159] Meanwhile, the resin composition application device (10) can apply the resin composition (40) to at least one surface of the battery. That is, the resin composition application device (10) can apply the resin composition (40) to at least one surface of the housing (50) that accommodates the battery or to at least a portion of at least one surface of the battery.

[0160] Fig. 15 is a schematic exploded perspective view schematically illustrating a battery pack (1) according to one embodiment of the present application. Fig. 16 is a schematic enlarged view for explaining a portion (e.g., portion R) of the battery pack of Fig. 15. Fig. 17 is a top view illustrating a top view of Fig. 16. Fig. 18 is a side cross-sectional view along line PP' of Fig. 17.

[0161] Fig. 19 is an exploded perspective view schematically illustrating a battery module (2) according to one embodiment of the present application. Fig. 20 is a top view illustrating the top view of Fig. 19. Fig. 21 is a side cross-sectional view taken along line QQ' of Fig. 20.

[0162] The battery assembly (1, 2) according to various embodiments of the present application may be a term encompassing at least a portion of a battery pack (1) or at least a portion of a battery module (2). For example, in the present specification, the battery assembly (1, 2) may be a battery pack (1) or a battery module (2), or may refer to a battery cell structure in which at least a portion of the housing of the battery pack (1) or the battery module (2) is omitted.

[0163] Referring to FIGS. 15 and 19, a battery assembly (1, 2) according to various embodiments may include a housing (1b, 2d) having a mounting surface (1c, 2e) and a stacked battery (2T, 2a) disposed on the mounting surface (1c, 2e).

[0164] For example, the housings (1b, 2d) in FIGS. 15 and 19 may correspond to the housing (50) in FIG. 14, and the mounting surfaces (1c, 2e) in FIGS. 15 and 19 may correspond to the mounting surface (51) in FIG. 14.

[0165] A stacked battery (2T, 2a) may include a plurality of battery cells (BC, see FIG. 19). The plurality of battery cells (BC) may be stacked. For example, the plurality of battery cells (BC) may be stacked in one direction (e.g., a first direction (x direction)).

[0166] Referring to FIG. 15, the laminated battery (2T) may be a battery module in which a plurality of battery cells are at least partially surrounded by a cover or the like. Although not illustrated in the drawing, the laminated battery (2T) may be a plurality of battery cells, in which case the battery pack (1) may be a cell-to-pack. Referring to FIG. 19, the laminated battery (2a) may be a laminate in which a plurality of battery cells (BC) are laminated.

[0167] The battery assembly (1, 2) may include a resin composition (40) disposed on the mounting surfaces (1c, 2e). A portion of the resin composition (40) may be interposed between the housing (1b, 2d) and the laminated battery (2T, 2a). Another portion of the resin composition (40) may be disposed between the mounting surfaces (1c, 2e) and the laminated battery (2T, 2a). The resin composition (40) may be interposed between the mounting surfaces (1c, 2e) and the laminated battery (2T, 2a) to bond the housing (1b, 2d) and the laminated battery (2T, 2a). Here, for example, the resin composition (40) may be a resin composition (40) that is applied in a liquid state and then cured.

[0168] The resin composition (40) placed between the housing (1b, 2d) and the laminated battery (2T, 2a) has an average thickness (H 40 ) for maximum thickness and average thickness (H 40 ) can be within 5%, for example, the average thickness (H40 ) for minimum thickness and average thickness (H 40 ) may be within 5%. That is, the resin composition (40) disposed between the housing (1b, 2d) and the laminated battery (2T, 2a) may have a substantially minimized thickness difference. This may be implemented through a resin composition application device (10) that applies the resin composition (40) by shaving. When the resin composition (40) is applied through a shaving device, a thickness difference may occur in the resin composition (40) disposed between the housing (1b, 2d) and the laminated battery (2T, 2a). The average thickness (H) of the resin composition (40) 40 ) is not particularly limited, but may mean a value obtained by dividing the cross-sectional area of ​​the resin composition (40) disposed between the housing (1b, 2d) and the laminated battery (2T, 2a) by the volume of the resin composition (40) disposed between the housing (1b, 2d) and the laminated battery (2T, 2a) in contact with the mounting surface (1c, 2e). Here, for example, the resin composition (40) may be a resin composition (40) that is applied in a liquid state and then cured.

[0169] In an embodiment, the resin composition (40) interposed between the housing (1b, 2d) and the laminated battery (2T, 2a) may have a substantially uniform thickness. For example, the resin composition (40) disposed between the housing (1b, 2d) and the laminated battery (2T, 2a) may have a substantially uniform thickness at least within the area range that is applied at one time in a shaving cloth manner. For example, the battery assembly (1, 2) manufactured in the manner according to one embodiment of the present application has at least a length of a long side of the discharge hole (e.g., a first direction width (d) of FIG. 9 D1 )) within the area range corresponding to the resin composition (40) can be applied at once in a shaving cloth manner, so that the resin composition (40) can have a substantially uniform thickness. Meanwhile, in one embodiment, the length of the long side of the discharge hole (e.g., the first direction width (d) of FIG. 9) D1)) may be 100 mm or greater.

[0170] A battery assembly (1, 2) according to one embodiment of the present application may be a battery pack (1). The battery pack (1) may include a stacked battery (2T). The battery pack (1) may include various control devices such as a battery management system (BMS) and a cooling device.

[0171] Again, referring to FIG. 15, the battery pack (1) may include a pack outer wall portion (1a) surrounding the stacked battery (2T). The pack outer wall portion (1a) may include a base portion (1a-1) supporting a lower surface of the stacked battery (2T) and a side wall portion (1a-2) surrounding a side surface of the stacked battery (2T). The battery pack (1) may include a cross member (1d) crossing the base portion (1a-1) in one direction (e.g., a first direction (x direction)) to secure structural rigidity. The battery pack (1) may include a housing (1b) connecting the cross member (1d) and the side wall portion (1a-2) to form a mounting surface (1c) on which the stacked battery (2T) is mounted. The battery pack (1) may include an electric component (1e) including a battery management system and various control devices. However, the structure of the battery pack (1) is not limited to this.

[0172] Referring to FIG. 19, the battery module (2) may include a housing (2d) including a mounting surface (2e) on which a stacked battery (2a) is mounted. The stacked battery (2a) may include a plurality of battery cells (BC) as described above. The battery module (2) may include a bus bar (2c) electrically connected to the stacked battery (2a). The stacked battery (2a) may include a positive tab and a negative tab. In one example, the positive tab and the negative tab may extend in opposite directions, but is not limited thereto, such as extending in the same direction. The bus bar (2c) may be plural, and some may be connected to the positive tab and others may be connected to the negative tab. The bus bar (2c) may have slits equal to or greater than the number of positive tabs or the number of negative tabs. By bending a portion of the positive and negative tabs that have passed through the slit and bringing them into contact with the bus bar (2c), an electrical connection between the bus bar (2c) and the laminated battery (2a) can be implemented.

[0173] The battery module (2) may include a cover (2b) to protect the stacked battery (2a). The cover (2b) may include an inner side cover (2b-1) that covers one side of the bus bar (2c) to protect the bus bar (2c) and an outer side cover (2b-2) that covers one side of the inner side cover (2b-2) to protect the inner side cover (2b-1). The cover (2b) may include an upper cover (2b-3) that covers an area not covered by the inner side cover (2b-1), the outer side cover (2b-2) and the housing (2d). The stacked battery (2a) may be surrounded by the cover (2b) and the housing (2d).

[0174] The resin composition application device (10) and battery assembly (1, 2) according to one embodiment of the present application can be widely applied to green technology fields such as electric vehicles, battery charging stations, and other battery-based solar and wind power generation. In addition, the resin composition application device (10) and battery assembly (1, 2) according to one embodiment of the present application can be applied to eco-friendly electric vehicles or hybrid vehicles to prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0175] While various embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and it will be apparent to those skilled in the art that various modifications and variations are possible without departing from the technical spirit of the present invention as set forth in the claims. Furthermore, the embodiments described above may be implemented by deleting some components, and the embodiments may be implemented in combination with each other.

[0176] [Explanation of symbols]

[0177] 10... Resin composition application device

[0178] 40... resin composition

[0179] 50... housing

[0180] 100... cartridge section

[0181] 200... mixer section

[0182] 300... application area

Claims

1. In a resin composition application device for applying a resin composition to at least one side of a housing that accommodates a battery or at least a part of at least one side of the battery, cartridge section; A mixer unit connected to the above cartridge unit; and Including a coating unit connected to the above mixer unit, The above application part, At least one application pipe provided to allow the resin composition flowing from the above mixer unit to pass through; and A discharge unit including a storage space provided to accumulate a resin composition flowing from at least one of the application tubes, The above discharge portion includes at least a first side and a second side forming the storage space, A resin composition application device configured to discharge the resin composition to the outside through a spaced space between one end of the first surface and one end of the second surface.

2. In paragraph 1, A resin composition application device, wherein the first side and the second side each independently have an inclination angle of more than 0 degrees and less than or equal to 90 degrees with respect to the surface on which the resin composition is to be applied.

3. In paragraph 1, A resin composition application device, wherein when one of the first side and the second side has an inclination angle of 90 degrees with respect to the surface on which the resin composition is to be applied, the other side has an inclination angle of more than 0 degrees and less than 90 degrees.

4. In paragraph 1, The cartridge portion includes a first cartridge portion for containing a subject composition and a second cartridge portion for containing a curing agent composition, the first cartridge portion is connected to the mixer portion by a first connecting pipe so as to be fluidly connected, and the second cartridge portion is connected to the mixer portion by a second connecting pipe so as to be fluidly connected. A resin composition application device including a mixing unit, wherein the mixing unit is fluidly connected to the first connecting pipe and the second connecting pipe, and a mixing unit is fluidly connected to the connecting pipe and includes a screw device.

5. In paragraph 1, At least one of the above-mentioned application tubes, Including the inlet and the flow section, The above entrance part is, The mixer part is arranged to at least partially overlap with the flow part, and the resin composition is connected to the flow part so that the resin composition flows. A resin composition application device having a shape in which the cross-sectional area through which the resin composition passes gradually decreases from the end of the mixer section to the end of the flow section.

6. In paragraph 5, The above flow unit is a resin composition application device in which the cross-sectional area of ​​each point through which the resin composition passes is continuously constant based on the direction in which the resin composition flows.

7. In paragraph 5, A resin composition application device wherein the flow section includes a bending section provided in at least a portion of the section to change the direction of movement of the resin composition.

8. In paragraph 7, The above-mentioned bending part is a resin composition application device that is bent 5 times or less.

9. In paragraph 6, The above flow section further includes a storage section provided in some areas to reduce the movement speed of the resin composition, The storage unit is a resin composition application device, wherein the cross-sectional area of ​​each point through which the resin composition passes is larger than the cross-sectional area of ​​each point through which the resin composition passes in an area other than the storage unit, based on the direction in which the resin composition flows.

10. In paragraph 2, A resin composition application device wherein the difference in inclination angle between the first surface and the second surface is 10 degrees or less.

11. In paragraph 1, A resin composition application device in which the first side and the second side are configured to gradually narrow toward the discharge end of the resin composition to form a nozzle structure.

12. In paragraph 1, The above discharge portion has a discharge hole that allows the resin composition to be discharged to the outside, The above discharge hole is a resin composition application device having a rectangular shape so that the resin composition is applied to the shaved surface.

13. In paragraph 12, The above discharge hole is, A resin composition application device in which the width in the second direction, which is the movement direction of the composition application device, is formed smaller than the width in the first direction perpendicular to the second direction.

14. In paragraph 1, A resin composition application device, wherein the resin composition is a viscous composition having a viscosity of 10,000 cP or more measured at 25°C.

15. In paragraph 1, The above application portion includes a case surrounding the application tube and at least a portion of the discharge portion, The above case is, External part; and A resin composition application device including a buffer section provided on the inner side of the outer section.

16. In paragraph 2, A resin composition application device wherein the inclination angle of the first surface is less than or equal to the inclination angle of the second surface.

17. In a resin composition application device for applying a resin composition to at least one side of a housing that accommodates a battery or at least a part of at least one side of the battery, cartridge section; A mixer unit connected to the above cartridge unit; and Including a coating unit connected to the above mixer unit, The above application part, At least one application pipe provided to allow the resin composition introduced from the above mixer unit to pass through; A discharge portion including a storage space provided to accumulate a resin composition flowing from at least one of the application tubes; and A case comprising at least a portion of the above-described application tube and discharge portion, A resin composition application device, wherein the case includes an inclined portion, and the inclined portion has a predetermined inclination angle with respect to the surface to be applied.

18. In paragraph 17, The above discharge part is, It comprises a first side and a second side facing each other to form the storage space and having a predetermined inclination angle based on the surface on which the resin composition is to be applied, The inclination angle of the first surface is smaller than or equal to the inclination angle of the second surface, A resin composition application device in which a predetermined inclination angle of the inclined portion is smaller than the inclination angle of the second surface.

19. In paragraph 17, The above case is a resin composition application device including a plurality of inclined portions.

20. Housing with a mounting surface, A laminated battery arranged on the above-mentioned mounting surface and A resin composition is included between the mounting surface and the laminated battery to join the housing and the laminated battery. The ratio of the difference between the maximum thickness of the resin composition and the average thickness of the cured resin composition between the housing and the laminated battery is within 5%, The ratio of the difference between the minimum thickness of the resin composition and the average thickness is within 5%. Battery assembly.

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