Battery module resin injection device

Abstract

The present invention provides a structure of a battery module in which a resin injection device, for injecting a resin into the battery module provided with an injection hole in the bottom surface thereof, comprises: a mounting part for mounting the battery module in a vertically inverted state; and a nozzle which has, in the front end portion thereof, a nozzle hole configured so as to be engageable with the injection hole, and which is configured so as to be capable of supplying a resin to the battery module, wherein the nozzle is extended while being inclined at a predetermined angle with respect to a normal direction of the bottom surface of the battery module, or is provided with a long side and a short side intersecting the respective long side and short side of the battery module.

Description

Battery module resin injection device

[0001] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2024-0044192, dated April 1, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the structure of a device for injecting resin into a battery module. More specifically, the present invention relates to a resin injection device for injecting resin into a frame to adhesively fix a battery cell and a frame, and to the structure of a battery module manufactured using the device.

[0003] Secondary batteries, which boast high electrical properties such as high energy density and easy applicability across a wide range of product groups, are widely used not only in portable devices but also in electric or hybrid vehicles powered by electrical power sources, as well as in power storage devices. These batteries are attracting attention as a new energy source for environmental friendliness and energy efficiency, not only because they can dramatically reduce fossil fuel use, but also because they produce no byproducts from energy use.

[0004] While small mobile devices typically use one or two or three battery cells per device, medium- to large-sized devices, such as automobiles, require high output and large capacity. Therefore, medium- to large-sized battery modules, which electrically connect multiple battery cells, are used.

[0005] Figures 1 and 2 illustrate the structure of a battery module. Referring to these drawings, the battery module (1) is configured by placing a plurality of stacked battery cells (12) within a frame (11) made of a metal material. The frame (11) can form a box-shaped housing together with other plates covering the upper, front, and rear sides of the battery cells (12), as shown in Figure 2.

[0006] A resin (13) is provided between the bottom plate of the frame (11) and the bottom surface of the battery cell (12). The resin (13) is applied on the bottom plate, and when the battery cell (12) is placed, the resin hardens to adhesively fix the battery cell (12) and the frame (11). The resin (13) is made of a material having high thermal conductivity, and can conduct heat generated in the battery cell (12) during charging and discharging to the frame (11) to dissipate the heat.

[0007] Fig. 3 shows the bottom surface of the frame of the battery module of Fig. 1. Referring to this, the frame (11) is provided with a plurality of injection holes (110) for injecting and filling the resin (13). In addition, the frame (11) is provided with a checking hole (113) for checking whether the resin (13) is completely filled in the space between the battery cell (12) and the frame (11). When the resin (13) is injected through the injection hole (110), whether the resin (13) is filled can be checked by checking whether the resin (13) has reached the checking hole (113).

[0008] Meanwhile, the resin (13) has a very high viscosity even before curing, so its flow is uneven and very slow. Therefore, a problem occurs in which the resin (13) overflows from the injection hole (110) before completely filling the space between the frame (11) and the battery cell (12).

[0009] In addition, only local reach of the resin (13) can be confirmed through the checking hole (113). Therefore, it is difficult to guarantee that the resin (13) is evenly and sufficiently distributed between the frame (11) and the battery cell (12).

[0010] Accordingly, there is an urgent need for a resin injection device and battery module structure that can evenly and quickly inject resin into a desired space.

[0011] The present invention was conceived against the background of the prior art described above, and its purpose is to provide a structure for a resin injection device capable of rapidly injecting resin into a battery module. Accordingly, the present invention seeks to provide a structure for a resin injection device that does not require excessive energy to inject resin or cause backflow of the resin.

[0012] The present invention also aims to provide a structure of a resin injection device capable of evenly injecting resin into a battery module.

[0013] Another technical task of the present invention is to provide a structure of a battery module into which resin can be injected using the resin injection device described above.

[0014] The technical objectives of the present invention are not limited to the purposes mentioned above. Other objectives and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objectives and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0015] In order to solve the above problem, the present invention provides a resin injection device for injecting resin into a battery module having long and short sides in a horizontal direction and a pouring hole provided on a bottom surface, the device comprising: a mounting portion for mounting the battery module in an upside-down state; and a nozzle having a nozzle hole configured to be engaged with the pouring hole at a front end thereof, the nozzle being configured to supply the resin to the battery module through the pouring hole in a state in which the nozzle hole is engaged with the pouring hole; wherein the nozzle is extended at a predetermined angle with respect to a normal direction of a bottom surface of the battery module.

[0016] Accordingly, the resin injected through the injection hole has a higher horizontal velocity, allowing it to diffuse more quickly within the battery module and avoid backflow. Furthermore, by allowing the flow direction of the resin to be set, the injection of the resin can be performed more predictably.

[0017] The above nozzle may be configured to be movable. In this case, the nozzle hole may be engaged with the injection hole as the nozzle descends.

[0018] The above nozzles may be arranged in multiple numbers along the short side direction of the battery module. At this time, the nozzle holes and the injection holes may also be arranged in multiple numbers corresponding to this along the short side direction of the battery module.

[0019] According to Embodiment 1 of the present invention, the nozzle may be inclined toward one side of the longitudinal direction of the battery module. Accordingly, the resin injected through the nozzle may form a flow parallel to the longitudinal direction of the battery module.

[0020] By the resin injection device, the resin can be injected through the injection holes arranged along the short side direction of the battery module, and then flow in the long side direction of the battery module to fill the space within the battery module.

[0021] The nozzle hole may have a long side and a short side. At this time, the long side direction of the nozzle hole may intersect the long side direction of the battery module, and the short side direction of the nozzle hole may intersect the short side direction of the battery module. That is, the nozzle hole may extend in a direction intersecting the extension direction of the battery module. Accordingly, the resin flowing out from the nozzle hole may have a greater flow rate in the long side direction of the battery module than in the short side direction of the battery module.

[0022] According to Embodiment 2 of the present invention, the nozzle may include: a first nozzle inclined toward one side of the longitudinal direction of the battery module; and a second nozzle inclined toward the other side of the longitudinal direction of the battery module. Accordingly, the first nozzle and the second nozzle may form a flow of resin in opposite directions along the longitudinal direction of the battery module.

[0023] At this time, the first nozzle and the second nozzle may be configured to be able to be raised and lowered together, and the first nozzle hole provided in the first nozzle and the second nozzle hole provided in the second nozzle may be engaged with the injection hole as the first nozzle and the second nozzle are lowered.

[0024] The first nozzle and the second nozzle may be arranged alternately along the short-side direction of the battery module. At this time, the first nozzle hole provided in the first nozzle and the second nozzle hole provided in the second nozzle may be arranged along the long-side center line of the battery module. Accordingly, the resin may be injected so as to flow from the long-side center of the battery module to both long-side ends of the battery module.

[0025] The nozzle hole may have a long side and a short side. At this time, the long side direction of the nozzle hole may intersect the long side direction of the battery module, and the short side direction of the nozzle hole may intersect the short side direction of the battery module. That is, the nozzle hole may extend in a direction intersecting the extension direction of the battery module. Accordingly, the resin flowing out from the nozzle hole may have a greater flow rate in the long side direction of the battery module than in the short side direction of the battery module.

[0026] According to Embodiment 2 of the present invention, the nozzle hole may be formed in a semicircle having a straight portion and a curved portion. In this case, since the curved portion is formed longer than the straight portion, the resin flowing out through the nozzle hole has a greater flow rate passing through the curved portion than the flow rate passing through the straight portion. Accordingly, since the distribution of the flow rate of the resin injected through the injection hole can be set according to the direction, the resin can be injected more predictably and filled more evenly.

[0027] At this time, the straight portion of the first nozzle hole may face one side of the long side direction of the battery module compared to the curved portion, and the straight portion of the second nozzle hole may face the other side of the long side direction of the battery module compared to the curved portion. Accordingly, the main flows of the resin passing through the first nozzle hole and the resin passing through the second nozzle hole may face opposite directions along the long side direction of the battery module.

[0028] The present invention also provides a resin injection device for injecting resin into a battery module having long sides and short sides in a horizontal direction and a pouring hole provided on a bottom surface, the device comprising: a mounting portion for mounting the battery module in an upside-down state; and a nozzle having a nozzle hole configured to be engaged with the pouring hole at a front end thereof, the nozzle being configured to supply the resin to the battery module through the pouring hole in a state where the nozzle hole is engaged with the pouring hole; wherein the nozzle hole has long sides and short sides, the long side direction of the nozzle hole intersects the long side direction of the battery module, and the short side direction of the nozzle hole intersects the short side direction of the battery module. The structure of the resin injection device is provided.

[0029] Accordingly, since the distribution of the flow rate of the resin injected through the injection hole can be set according to the direction, the resin can be injected more predictably and filled more evenly.

[0030] The above nozzle may be configured to be movable. In this case, the nozzle hole may be engaged with the injection hole as the nozzle descends.

[0031] The above nozzles may be arranged in multiple numbers along the short side direction of the battery module. At this time, the nozzle holes and the injection holes may also be arranged in multiple numbers corresponding to this along the short side direction of the battery module.

[0032] The nozzle may extend at a predetermined angle relative to the normal direction of the bottom surface of the battery module. Accordingly, the resin injected through the injection hole may have a higher horizontal velocity, allowing it to spread more quickly within the battery module and prevent backflow. Furthermore, by allowing the flow direction of the resin to be set, the injection of the resin may be performed more predictably.

[0033] Specifically, the nozzle may be inclined toward one side of the longitudinal direction of the battery module. Accordingly, the resin injected through the nozzle may form a flow parallel to the longitudinal direction of the battery module.

[0034] According to Embodiment 2 of the present invention, the nozzle may include: a first nozzle inclined toward one side of the longitudinal direction of the battery module; and a second nozzle inclined toward the other side of the longitudinal direction of the battery module. Accordingly, the first nozzle and the second nozzle may form a flow of resin in opposite directions along the longitudinal direction of the battery module.

[0035] At this time, the first nozzle and the second nozzle may be configured to be able to be raised and lowered together, and the first nozzle hole provided in the first nozzle and the second nozzle hole provided in the second nozzle may be engaged with the injection hole as the first nozzle and the second nozzle are lowered.

[0036] The first nozzle and the second nozzle may be arranged alternately along the short-side direction of the battery module. At this time, the first nozzle hole provided in the first nozzle and the second nozzle hole provided in the second nozzle may be arranged along the long-side center line of the battery module. Accordingly, the resin may be injected so as to flow from the long-side center of the battery module to both long-side ends of the battery module.

[0037] According to Embodiment 2 of the present invention, the nozzle hole may be formed in a semicircle having a straight portion and a curved portion. In this case, since the curved portion is formed longer than the straight portion, the resin flowing out through the nozzle hole has a greater flow rate passing through the curved portion than the flow rate passing through the straight portion. Accordingly, since the distribution of the flow rate of the resin injected through the injection hole can be set according to the direction, the resin can be injected more predictably and filled more evenly.

[0038] At this time, the straight portion of the first nozzle hole may face one side of the long side direction of the battery module compared to the curved portion, and the straight portion of the second nozzle hole may face the other side of the long side direction of the battery module compared to the curved portion. Accordingly, the main flows of the resin passing through the first nozzle hole and the resin passing through the second nozzle hole may face opposite directions along the long side direction of the battery module.

[0039] The present invention also provides a structure of a battery module configured so that a resin injection device having a structure as described above can be applied.

[0040] The battery module may have long sides and short sides in a horizontal direction, and a pouring hole may be provided on a bottom surface, and the pouring hole may have long sides and short sides, and the long side direction of the pouring hole may intersect the long side direction of the battery module, and the short side direction of the pouring hole may intersect the short side direction of the battery module. That is, the pouring hole may extend in a direction intersecting the extension direction of the battery module. Accordingly, the resin flowing from the pouring hole may have a greater flow rate in the long side direction of the battery module than in the short side direction of the battery module.

[0041] According to Embodiment 1 of the present invention, the battery module may further include a checking hole. The checking hole may be open or transparent to allow viewing of the inside of the battery module. By confirming whether the resin has reached the checking hole, the filling of the resin can be confirmed.

[0042] At this time, the injection hole may be provided offset to one side with respect to the center of the longitudinal direction of the bottom surface of the battery module, and the checking hole may be provided offset to the other side with respect to the center of the longitudinal direction of the bottom surface of the battery module. In this case, by checking the checking hole, it can be confirmed whether the resin has been evenly filled.

[0043] The above injection hole may be formed in a semicircle having a straight portion and a curved portion. In this case, since the curved portion is formed longer than the straight portion, the resin flowing through the injection hole has a greater flow rate passing through the curved portion than the flow rate passing through the straight portion. Accordingly, the distribution of the flow rate of the resin injected through the injection hole can be set according to the direction, so that the resin can be injected more predictably and filled more evenly.

[0044] According to Embodiment 2 of the present invention, the injection hole may include: a first injection hole, the straight portion of which faces one side of the longitudinal direction of the battery module relative to the curved portion; and a second injection hole, the straight portion of which faces the other side of the longitudinal direction of the battery module relative to the curved portion. Accordingly, the main flows of the resin passing through the first injection hole and the resin passing through the second injection hole may face opposite directions along the longitudinal direction of the battery module.

[0045] The first injection hole and the second injection hole may be arranged in a short-side direction along the longitudinal center line of the battery module. Accordingly, the resin may be injected so as to flow from the longitudinal center of the battery module to both long-side ends of the battery module.

[0046] At this time, the battery module may additionally include a pair of checking holes provided on both sides of the long side of the bottom surface. In this case, by checking the checking holes, it can be confirmed whether the resin is evenly filled.

[0047] The present invention can provide a structure of a resin injection device capable of rapidly injecting resin into a battery module by adjusting the angle of the nozzle and / or the shape of the nozzle hole.

[0048] The resin injection device according to the present invention can perform smooth resin injection without backflow with little energy.

[0049] The present invention can also provide a structure of a resin injection device capable of evenly injecting resin into a battery module by the shape of a nozzle and / or nozzle hole.

[0050] The present invention also provides a structure of a battery module having a resin injection hole and / or a checking hole into which resin can be injected using the resin injection device as described above, thereby evenly injecting resin and strengthening structural and thermal connectivity between battery cells and a frame.

[0051] In addition, the present invention may have various other effects, which will be described in each embodiment, or the description of effects that can be easily inferred by a person skilled in the art will be omitted.

[0052] Figures 1 and 2 show the structure of a battery module.

[0053] Figure 3 shows the bottom surface of the frame of the battery module of Figure 1.

[0054] Figures 4 and 5 show the state before the nozzle of the resin injection device according to Example 1 is lowered, and Figure 6 shows the state after the nozzle is lowered.

[0055] Figure 7 shows the flow of resin according to the nozzle angle of Example 1.

[0056] Figure 8 shows the flow rate of resin in each direction according to the nozzle hole shape of Example 1.

[0057] Figure 9 shows the flow of resin according to the nozzle hole shape of Example 1.

[0058] Figures 10 and 11 show the structure of a battery module to which the resin injection device according to Example 2 is applied.

[0059] Figures 12 and 13 show the state before the nozzle of the resin injection device according to Example 2 is lowered, and Figure 14 shows the state after the nozzle is lowered.

[0060] Figure 15 shows the flow of resin according to the nozzle angle of Example 2.

[0061] Figure 16 shows the flow rate of resin in each direction according to the nozzle hole shape of Example 2.

[0062] Figure 17 shows the flow of resin according to the nozzle hole shape of Example 2.

[0063] Figures 18 and 19 show the structure of a battery module to which the resin injection device according to Example 2 is applied.

[0064] Figures 20 and 21 each illustrate a battery pack including a battery module according to one embodiment of the present invention and a vehicle including the same.

[0065] [Explanation of symbols]

[0066] 1: Battery module

[0067] 11: Frame

[0068] 110: Juak Hall

[0069] 111: First Jukak Hall

[0070] 112: Second Jukak Hall

[0071] 113: Checking Hall

[0072] 12: Battery cell

[0073] 13: Resin

[0074] 2: Resin injection device

[0075] 20: Nozzle

[0076] 200: Nozzle hole

[0077] 21: Nozzle 1

[0078] 210: Nozzle hole 1

[0079] 22: Second nozzle

[0080] 220: Second nozzle hole

[0081] 23: The storage unit

[0082] A: Curved section

[0083] B: Straight line

[0084] P: Battery pack

[0085] V: Car

[0086] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily practice the technical idea of ​​the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0087] Although the terms "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used solely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

[0088] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0089] Hereinafter, the phrase "any configuration is placed on (or below)" a component or "on (or below)" a component may mean that any configuration is placed in contact with the upper surface (or lower surface) of said component, and that other configurations may be interposed between said component and any configuration placed on (or below) said component.

[0090] Additionally, when it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the components may be directly connected or connected to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through another component.

[0091] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0092] Throughout the specification, when we refer to "A and / or B", we mean A, B, or A and B, unless otherwise stated, and when we refer to "C through D", we mean C or more and D or less, unless otherwise stated.

[0093] The present invention provides a resin injection device for injecting resin into a battery module including a battery cell, a frame for accommodating the battery cell, and a resin that is injected between the battery cell and the frame and is cured to adhesively fix the battery cell and the frame, and a structure of a battery module corresponding thereto and a resin injection device that enables the resin to be smoothly injected.

[0094] Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings.

[0095]

[0096] [Example 1]

[0097] Figures 4 and 5 show the state before the nozzle of the resin injection device according to Example 1 is lowered, and Figure 6 shows the state after the nozzle is lowered. Referring to these drawings, the resin injection device (2) according to Example 1 includes a nozzle (20) for injecting resin into the frame (11) of the battery module (1) and a support (23) for supporting the battery module (1).

[0098] The above battery module (1) may have long sides and short sides in the horizontal direction.

[0099] The above-mentioned mounting portion (23) can support the battery module (1) so that the battery module (1) can have an accurate relative position with respect to the nozzle (20). At this time, the battery module (1) can be mounted on the mounting portion (23) so that the bottom surface of the frame (11) faces upward, thereby allowing resin to be injected between the bottom surface of the frame (11) and the battery cell accommodated in the frame (11).

[0100] The above nozzle (20) has a nozzle hole (200) at one end thereof for discharging resin.

[0101] The above nozzle (20) may be configured to be able to be raised or lowered. As the nozzle (20) descends, the nozzle hole (200) may be engaged with the injection hole (110) provided in the frame (11). Thereafter, the nozzle (20) may discharge resin through the nozzle hole (200), and the resin may be injected into the frame (11) through the injection hole (110).

[0102] The above nozzle (20) may be provided in multiple numbers. Specifically, the nozzle (20) may be provided in multiple numbers arranged in the long side direction and / or the short side direction of the battery module (1). At this time, the nozzle hole (200) and the injection hole (110) may also be provided in multiple numbers, similar to the nozzle (20).

[0103] According to the present embodiment, the injection holes (110) may be provided in multiple numbers arranged along the short side direction near one end of the long side direction of the frame (11), and the nozzles (20) may also be arranged in multiple numbers so that the nozzle holes (200) can be positioned corresponding to the injection holes (110).

[0104] Fig. 7 shows the flow of resin according to the nozzle angle of Example 1. Referring again to Figs. 4 to 6, the nozzle (20) according to the present embodiment can be extended in a direction inclined at a predetermined angle with respect to the normal direction of the bottom surface of the frame (11). Accordingly, the flow of resin injected through the nozzle (20) has a speed in a predetermined horizontal direction, so that the injection of the resin is fast, the backflow of the resin is prevented, and the direction of the flow formed as the resin is injected can be predicted and set.

[0105] According to the present embodiment, the nozzle (20) may be inclined toward one side of the longitudinal direction of the battery module (1). Accordingly, the flow of the resin injected through the nozzle (20) has a speed parallel to the longitudinal direction of the battery module (1).

[0106] Specifically, the resin injected through the nozzle (20) can be injected through the injection hole (110) provided near one end of the long side of the frame (11) and flow toward the other end of the long side of the frame (11).

[0107] Figure 8 shows the flow rate of resin in each direction according to the nozzle hole shape of Example 1, and Figure 9 shows the flow of resin according to the nozzle hole shape of Example 1. Referring back to Figure 4 together with these drawings, the nozzle hole (200) according to Example 1 may have long sides and short sides.

[0108] At this time, the long side direction of the nozzle hole (200) may intersect with the long side direction of the battery module (1), and the short side direction of the nozzle hole (200) may intersect with the short side direction of the battery module (1). That is, the nozzle hole (200) may extend in a direction intersecting with the extension direction of the battery module (1). Of course, at this time, the injection hole (110) may have a shape corresponding to the nozzle hole (200).

[0109] Since the nozzle hole (200) has an extended shape as described above, the resin flowing out from the nozzle hole (200) can have a greater flow rate in the long side direction of the battery module (1) than in the short side direction of the battery module (1). This is true even when the resin is injected with a uniform pressure and speed in the entire horizontal direction, but it is even more true when the resin is injected with a greater speed in a horizontal direction parallel to the long side direction of the battery module (1) as in the present embodiment.

[0110] According to this embodiment, due to the inclination of the nozzle (20) and the shape of the nozzle hole (200), the resin injected near one end of the long side of the frame (11) can flow at a greater speed and flow rate toward the other end of the long side of the frame (11) and be filled inside the frame (11).

[0111] The angle of the nozzle and the shape of the nozzle hole according to the present embodiment, although combined to produce a synergistic effect, are each independent components of the present invention. That is, the objectives of the present invention can be partially or fully achieved with just one of the angle of the nozzle and the shape of the nozzle hole. Therefore, a resin injection device having only one of the angle of the nozzle and the shape of the nozzle hole specified in this embodiment should also be considered an embodiment of the present invention.

[0112] Figures 10 and 11 illustrate the structure of a battery module to which a resin injection device according to Example 2 is applied. Referring to this, the battery module (1) according to the present embodiment may include the frame (11) having an open upper portion, a battery cell (12) accommodated in the frame (11), and the resin (13) filled between the bottom surface of the frame (11) and the bottom surface of the battery cell (12) to adhesively fix the frame (11) and the battery cell (12).

[0113] The above frame (11) may form a housing that surrounds the battery cell (12) together with one or more other members, but the frame (11) is not particularly limited in its structure or shape, but only needs to have a bottom surface in which the injection hole (110) is provided.

[0114] The above battery cell (12) may be a pouch-type battery cell in which multiple cells are stacked, but its structure and shape are not specifically limited.

[0115] The injection hole (110) according to the present embodiment may have long sides and short sides.

[0116] At this time, the long side direction of the injection hole (110) may intersect with the long side direction of the battery module (1), and the short side direction of the injection hole (110) may intersect with the short side direction of the battery module (1). That is, the injection hole (110) may extend in a direction intersecting with the extension direction of the battery module (1).

[0117] Since the injection hole (110) has an extended shape as described above, the resin flowing in from the injection hole (110) can have a greater flow rate in the long side direction of the battery module (1) than in the short side direction of the battery module (1). This is true even when the resin is injected with a uniform pressure and speed in the entire horizontal direction, but it is even more true when the resin is injected with a greater speed in a horizontal direction parallel to the long side direction of the battery module (1) as in the present embodiment.

[0118] According to the present embodiment, due to the inclination of the nozzle (20), the shape of the nozzle hole (200), and the shape of the injection hole (110), the resin injected near one end in the longitudinal direction of the frame (11) can flow at a greater speed and flow rate toward the other end in the longitudinal direction of the frame (11) and be filled inside the frame (11).

[0119] According to the present embodiment, the battery module (1) may additionally include a checking hole (113). The checking hole (113) may be open or transparent so that the inside of the battery module (1) can be viewed. By confirming whether the resin has reached the checking hole (113), the presence or absence of resin filling can be confirmed.

[0120] According to the present embodiment, the injection hole (110) may be provided offset to one side with respect to the center of the longitudinal direction of the bottom surface of the battery module (1), and the checking hole (113) may be provided offset to the other side with respect to the center of the longitudinal direction of the bottom surface of the battery module (1). That is, the injection hole (110) may be provided near one end of the longitudinal direction of the frame (11), and the checking hole (113) may be provided near the other end of the longitudinal direction of the frame (11). In this case, by checking the checking hole (113), it can be confirmed whether the resin is evenly filled.

[0121]

[0122] [Example 2]

[0123] Figures 12 and 13 show the state before the nozzle of the resin injection device according to Example 2 is lowered, and Figure 14 shows the state after the nozzle is lowered. Referring to these drawings, the resin injection device (2) according to Example 2 includes a nozzle (20) for injecting resin into the frame (11) of the battery module (1) and a support (23) for supporting the battery module (1).

[0124] The above battery module (1) may have long sides and short sides in the horizontal direction.

[0125] The above-mentioned mounting portion (23) can support the battery module (1) so that the battery module (1) can have an accurate relative position with respect to the nozzle (20). At this time, the battery module (1) can be mounted on the mounting portion (23) so that the bottom surface of the frame (11) faces upward, thereby allowing resin to be injected between the bottom surface of the frame (11) and the battery cell accommodated in the frame (11).

[0126] The above nozzle (20) has a nozzle hole (200) at one end thereof for discharging resin.

[0127] The above nozzle (20) may be configured to be able to be raised or lowered. As the nozzle (20) descends, the nozzle hole (200) may be engaged with the injection hole (110) provided in the frame (11). Thereafter, the nozzle (20) may discharge resin through the nozzle hole (200), and the resin may be injected into the frame (11) through the injection hole (110).

[0128] According to the present embodiment, the nozzle (20) may include: a first nozzle (21) inclined toward one side of the longitudinal direction of the battery module (1); and a second nozzle (22) inclined toward the other side of the longitudinal direction of the battery module (1). Accordingly, the first nozzle (21) and the second nozzle (22) may form a flow of resin in opposite directions along the longitudinal direction of the battery module (1).

[0129] At this time, the first nozzle (21) and the second nozzle (22) can be configured to be raised and lowered together, and the first nozzle hole (210) provided in the first nozzle (21) and the second nozzle hole (220) provided in the second nozzle (22) can be engaged with the injection hole (110) as the first nozzle (21) and the second nozzle (22) descend.

[0130] At this time, the injection hole (110) may include a first injection hole (111) having a shape and position corresponding to the first nozzle hole (210) and a second injection hole (112) having a shape and position corresponding to the second nozzle hole (220).

[0131] The above nozzle (20) may be provided in multiple numbers. Specifically, the nozzle (20) may be provided in multiple numbers arranged in the long side direction and / or the short side direction of the battery module (1). At this time, the nozzle hole (200) and the injection hole (110) may also be provided in multiple numbers, similar to the nozzle (20).

[0132] Specifically, the first nozzle (21) and the second nozzle (22) may each be provided in one or more numbers. Accordingly, the first nozzle hole (210) and the second nozzle hole (220), and the first injection hole (111) and the second injection hole (112) corresponding thereto may each be provided in one or more numbers.

[0133] According to the present embodiment, the injection hole (110) may be provided in a plurality of first injection holes (111) and second injection holes (112) arranged alternately along the longitudinal center line of the frame (11), and the nozzle (20) may also be provided in a plurality of first nozzles (21) and second nozzles (22) arranged alternately so that the nozzle holes (200) correspond to the injection holes (110).

[0134] According to the present embodiment, the resin can be injected so as to flow from the center of the longitudinal direction of the battery module (1) to both ends of the longitudinal direction of the battery module (1).

[0135] Fig. 15 shows the flow of resin according to the nozzle angle of Example 2. Referring again to Figs. 12 to 14, the nozzle (20) according to the present embodiment can be extended in a direction inclined at a predetermined angle with respect to the normal direction of the bottom surface of the frame (11). Accordingly, the flow of resin injected through the nozzle (20) has a speed in a predetermined horizontal direction, so that the injection of the resin is fast, the backflow of the resin is prevented, and the direction of the flow formed as the resin is injected can be predicted and set.

[0136] According to the present embodiment, the first nozzle (21) may be inclined toward one side of the longitudinal direction of the battery module (1), and the second nozzle (22) may be inclined toward the other side of the longitudinal direction of the battery module (1). Accordingly, the flows of the resin injected through the first nozzle (21) and the second nozzle (22) have opposite velocities along the longitudinal direction of the battery module (1).

[0137] Specifically, the resin injected through the nozzle (20) can be injected through the injection hole (110) provided along the longitudinal center line of the frame (11) and can be injected so as to flow toward both ends of the longitudinal direction of the frame (11). At this time, since the first nozzle (21) and the second nozzle (22) are alternately arranged and spaced apart from each other in the longitudinal direction of the battery module (1), mutual interference between the flow of the resin injected through the first nozzle (21) and the flow of the resin injected through the second nozzle (22) is minimized.

[0138] Fig. 16 shows the flow rate of resin in each direction according to the nozzle hole shape of Example 2, and Fig. 17 shows the flow of resin according to the nozzle hole shape of Example 2. Referring back to Fig. 12 along with these drawings, the nozzle hole (200) according to the present embodiment may have long sides and short sides.

[0139] At this time, the long side direction of the nozzle hole (200) may intersect with the long side direction of the battery module (1), and the short side direction of the nozzle hole (200) may intersect with the short side direction of the battery module (1). That is, the nozzle hole (200) may extend in a direction intersecting with the extension direction of the battery module (1). Of course, at this time, the injection hole (110) may have a shape corresponding to the nozzle hole (200).

[0140] Since the nozzle hole (200) has an extended shape as described above, the resin flowing out from the nozzle hole (200) can have a greater flow rate in the long side direction of the battery module (1) than in the short side direction of the battery module (1). This is true even when the resin is injected with a uniform pressure and speed in the entire horizontal direction, but it is even more true when the resin is injected with a greater speed in a horizontal direction parallel to the long side direction of the battery module (1) as in the present embodiment.

[0141] In addition, according to the present embodiment, the nozzle hole (200) may be formed in a semicircle having a straight portion (B) and a curved portion (A). In this case, since the curved portion (A) is formed longer than the straight portion (B), the resin flowing out through the nozzle hole (200) has a greater flow rate passing through the curved portion (A) than the flow rate passing through the straight portion (B).

[0142] This is true even when the resin is injected with a uniform pressure and speed in the entire horizontal direction, but it is even more true when the resin is injected with a greater speed in a horizontal direction parallel to the longitudinal direction of the battery module (1), as in the present embodiment.

[0143] According to this embodiment, since the distribution of the flow rate of the injected resin can be set according to the direction, the resin can be injected more predictably and filled more evenly.

[0144] At this time, the straight portion (B) of the first nozzle hole (210) may be directed toward one side of the long side direction of the battery module (1) compared to the curved portion (A), and the straight portion (B) of the second nozzle hole (220) may be directed toward the other side of the long side direction of the battery module (1) compared to the curved portion (A). Accordingly, the main flows of the resin passing through the first nozzle hole (210) and the resin passing through the second nozzle hole (220) may be directed in opposite directions along the long side direction of the battery module (1).

[0145] In both the first nozzle hole (210) and the second nozzle hole (220), it is preferable that the direction in which the straight portion (A) of the nozzle hole (200) is formed matches the direction in which the nozzle (20) is inclined.

[0146] According to this embodiment, due to the inclination of the nozzle (20) and the shape of the nozzle hole (200), the resin injected toward the center of the longitudinal direction of the frame (11) can flow at a greater speed and flow rate toward both sides of the longitudinal direction of the frame (11) and be filled inside the frame (11).

[0147] Figures 18 and 19 illustrate the structure of a battery module to which a resin injection device according to Example 2 is applied. Referring to this, the battery module (1) according to the present embodiment may include the frame (11) having an open upper portion, a battery cell (12) accommodated in the frame (11), and the resin (13) filled between the bottom surface of the frame (11) and the bottom surface of the battery cell (12) to adhesively fix the frame (11) and the battery cell (12).

[0148] The above frame (11) may form a housing that surrounds the battery cell (12) together with one or more other members, but the frame (11) is not particularly limited in its structure or shape, but only needs to have a bottom surface in which the injection hole (110) is provided.

[0149] The above battery cell (12) may be a pouch-type battery cell in which multiple cells are stacked, but its structure and shape are not specifically limited.

[0150] The injection hole (110) according to the present embodiment may have long sides and short sides.

[0151] At this time, the long side direction of the injection hole (110) may intersect with the long side direction of the battery module (1), and the short side direction of the injection hole (110) may intersect with the short side direction of the battery module (1). That is, the injection hole (110) may extend in a direction intersecting with the extension direction of the battery module (1).

[0152] Since the injection hole (110) has an extended shape as described above, the resin flowing in from the injection hole (110) can have a greater flow rate in the long side direction of the battery module (1) than in the short side direction of the battery module (1). This is true even when the resin is injected with a uniform pressure and speed in the entire horizontal direction, but it is even more true when the resin is injected with a greater speed in a horizontal direction parallel to the long side direction of the battery module (1) as in the present embodiment.

[0153] Additionally, according to the present embodiment, the injection hole (110) may be formed in a semicircle having a straight portion and a curved portion. In this case, since the curved portion is formed longer than the straight portion, the resin flowing through the injection hole (110) has a greater flow rate passing through the curved portion than the flow rate passing through the straight portion.

[0154] This is true even when the resin is injected with a uniform pressure and speed in the entire horizontal direction, but it is even more true when the resin is injected with a greater speed in a horizontal direction parallel to the longitudinal direction of the battery module (1), as in the present embodiment.

[0155] According to this embodiment, since the distribution of the flow rate of the injected resin can be set according to the direction, the resin can be injected more predictably and filled more evenly.

[0156] At this time, the straight portion of the first injection hole (111) may face one side of the long side direction of the battery module (1) compared to the curved portion, and the straight portion of the second injection hole (112) may face the other side of the long side direction of the battery module (1) compared to the curved portion. Accordingly, the main flow of the resin passing through the first injection hole (111) and the resin passing through the second injection hole (112) may face opposite directions along the long side direction of the battery module (1).

[0157] In both the first injection hole (111) and the second injection hole (112), it is preferable that the direction in which the straight portion of the injection hole (110) is formed matches the direction in which the corresponding nozzle (20) is inclined.

[0158] According to this embodiment, due to the inclination of the nozzle (20), the shape of the nozzle hole (200), and the shape of the injection hole (110), the resin injected toward the center of the longitudinal direction of the frame (11) can flow at a greater speed and flow rate toward both sides of the longitudinal direction of the frame (11) and be filled inside the frame (11).

[0159] According to the present embodiment, the battery module (1) may additionally include a checking hole (113). The checking hole (113) may be open or transparent so that the inside of the battery module (1) can be viewed. By confirming whether the resin has reached the checking hole (113), the presence or absence of resin filling can be confirmed.

[0160] According to the present embodiment, the checking hole (113) may be provided near both ends of the long side of the bottom surface of the battery module (1). In this case, by checking the checking hole (113), it can be confirmed whether the resin is evenly filled.

[0161]

[0162] Figures 20 and 21 illustrate a battery pack including a battery module according to an embodiment of the present invention and a vehicle including the same, respectively. Referring to these drawings, a plurality of battery modules (1) may be integrated to form a battery pack (P) in order to increase the capacity and / or voltage. The battery pack (P) may include a venting device capable of discharging gases and flames emitted when the battery module (1) ignites to the outside. The battery pack (P) may be incorporated into a vehicle (V) as a power source. The vehicle (V) may include an electric vehicle, a hybrid vehicle, etc.

[0163]

[0164] It should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention will be determined by the claims that follow, rather than by the detailed description set forth above. Furthermore, the meaning and scope of the claims that follow, as well as all possible modifications and variations derived from their equivalent concepts, should be construed as encompassing the scope of the present invention.

[0165] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. In a resin injection device for injecting resin into a battery module having long and short sides in a horizontal direction and a liquid injection hole provided on the bottom surface, A mounting portion for mounting the battery module in an upside-down state; and A nozzle having a nozzle hole configured to be engaged with the injection hole at the tip, and configured to supply the resin to the battery module through the injection hole while the nozzle hole is engaged with the injection hole; The above nozzle is a resin injection device that is extended at a predetermined angle with respect to the normal direction of the bottom surface of the battery module.

2. In claim 1, The above nozzle is configured to be liftable, A resin injection device in which the nozzle hole is engaged with the injection hole as the nozzle descends.

3. In claim 1, A resin injection device in which the above nozzles are arranged in multiple numbers along the short side direction of the battery module.

4. In claim 1, A resin injection device in which the nozzle is inclined toward one side of the longitudinal direction of the battery module.

5. In claim 4, The above nozzle hole has a long side and a short side, The long side direction of the above nozzle hole intersects the long side direction of the above battery module, A resin injection device in which the short side direction of the above nozzle hole intersects the short side direction of the above battery module.

6. In claim 1, The above nozzle: A first nozzle inclined toward one side of the longitudinal direction of the battery module; and A second nozzle inclined toward the other side of the longitudinal direction of the battery module is included; The first nozzle and the second nozzle are configured to be able to be lifted together, A resin injection device in which a first nozzle hole provided in the first nozzle and a second nozzle hole provided in the second nozzle are engaged with the injection hole as the first nozzle and the second nozzle descend.

7. In claim 6, A resin injection device wherein the first nozzle and the second nozzle are arranged alternately along the short side direction of the battery module.

8. In claim 6, A resin injection device, wherein the first nozzle hole provided in the first nozzle and the second nozzle hole provided in the second nozzle are arranged along the longitudinal center line of the battery module.

9. In claim 6, The above nozzle hole has a long side and a short side, The long side direction of the above nozzle hole intersects the long side direction of the above battery module, A resin injection device in which the short side direction of the above nozzle hole intersects the short side direction of the above battery module.

10. In claim 6, The above nozzle hole is formed in a semicircle having a straight portion and a curved portion, The straight portion of the first nozzle hole is directed toward one side of the long side of the battery module compared to the curved portion, The second nozzle hole is a resin injection device in which the straight portion thereof faces the other side of the long side of the battery module compared to the curved portion.

11. In a resin injection device for injecting resin into a battery module having long and short sides in a horizontal direction and a liquid injection hole provided on the bottom surface, A mounting portion for mounting the battery module in an upside-down state; and A nozzle having a nozzle hole configured to be engaged with the injection hole at the tip, and configured to supply the resin to the battery module through the injection hole while the nozzle hole is engaged with the injection hole; The above nozzle hole has a long side and a short side, The long side direction of the above nozzle hole intersects the long side direction of the above battery module, A resin injection device in which the short side direction of the above nozzle hole intersects the short side direction of the above battery module.

12. In claim 11, The above nozzle is configured to be liftable, A resin injection device in which the nozzle hole is engaged with the injection hole as the nozzle descends.

13. In claim 11, A resin injection device in which the above nozzles are arranged in multiple numbers along the short side direction of the battery module.

14. In claim 11, The above nozzle is a resin injection device that is extended at a predetermined angle with respect to the normal direction of the bottom surface of the battery module.

15. In claim 14, A resin injection device in which the nozzle is inclined toward one side of the longitudinal direction of the battery module.

16. In claim 14, The above nozzle: A first nozzle inclined toward one side of the longitudinal direction of the battery module; and A second nozzle inclined toward the other side of the longitudinal direction of the battery module is included; The first nozzle and the second nozzle are configured to be able to be lifted together, A resin injection device in which a first nozzle hole provided in the first nozzle and a second nozzle hole provided in the second nozzle are engaged with the injection hole as the first nozzle and the second nozzle descend.

17. In claim 16, A resin injection device wherein the first nozzle and the second nozzle are arranged alternately along the short side direction of the battery module.

18. In claim 16, A resin injection device, wherein the first nozzle hole provided in the first nozzle and the second nozzle hole provided in the second nozzle are arranged along the longitudinal center line of the battery module.

19. In claim 11, The above nozzle hole is formed in a semicircle having a straight portion and a curved portion, The above nozzle includes a first nozzle having a first nozzle hole and a second nozzle having a second nozzle hole, The first nozzle and the second nozzle are arranged alternately along the short side direction of the battery module, The straight portion of the first nozzle hole is directed toward one side of the long side of the battery module compared to the curved portion, The second nozzle hole is a resin injection device in which the straight portion thereof faces the other side of the long side of the battery module compared to the curved portion.

20. In claim 19, The first nozzle and the second nozzle are configured to be able to be lifted together, A resin injection device in which a first nozzle hole provided in the first nozzle and a second nozzle hole provided in the second nozzle are engaged with the injection hole as the first nozzle and the second nozzle descend.

21. In a battery module having long and short sides in a horizontal direction and a liquid injection hole provided on the bottom surface, The above-mentioned injection hole has long sides and short sides, The long side direction of the above-mentioned injection hole intersects the long side direction of the above-mentioned battery module, A battery module in which the short side direction of the above-mentioned injection hole intersects the short side direction of the above-mentioned battery module.

22. In claim 21, Includes additional checking holes, The above-mentioned injection hole is provided to be offset to one side with respect to the center of the long side of the bottom surface of the battery module, A battery module in which the above checking hole is provided offset to the other side with respect to the center of the long side of the bottom surface of the battery module.

23. In claim 21, The above injection hole is formed in a semicircle having a straight section and a curved section, The above liquid hole is: A first injection hole having a straight portion facing one side of the longitudinal direction of the battery module compared to the curved portion; and A battery module, comprising a second injection hole, wherein the straight portion faces the other side of the long side of the battery module compared to the curved portion.

24. In claim 23, A battery module, wherein the first injection hole and the second injection hole are arranged in the short-side direction along the long-side center line of the battery module.

25. In claim 24, A battery module further comprising a pair of checking holes provided on both sides of the long side of the bottom surface of the above frame.

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