Battery module equipped with thermally conductive resin

Abstract

The present invention provides a battery module structure comprising a battery cell, a module frame having a bottom plate on which the battery cell is placed, and a thermally conductive resin interposed between the bottom surface of the battery cell and the bottom plate, wherein the bottom plate is provided with anchor portions arranged in a grid pattern of multiple rows and / or multiple columns, and the thermally conductive resin extends downward and fills the anchor portions.

Description

Technical Field

[0005]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0171174 filed on November 30, 2023, and the content disclosed in the document of the Korean Patent Application is hereby incorporated by reference in its entirety.

[0002] The present invention relates to a structure of a battery module including a thermally conductive resin. More specifically, the present invention relates to a thermally conductive resin provided between a battery cell and a module frame, a battery module having enhanced bonding strength between the module frames, and a structure of a battery pack including the same.

Background Art

[0003] Secondary batteries, which are highly applicable to a wide range of products and have electrical characteristics such as high energy density, are widely used not only in portable devices but also in electric vehicles or hybrid vehicles driven by an electric drive source, power storage devices, and the like. These secondary batteries are attracting attention as a new energy source not only because they can significantly reduce the use of fossil fuels but also because they are environmentally friendly and improve energy efficiency in that they do not generate any by-products during energy use.

[0004] For small mobile devices, one or two or three battery cells are used per device, while for medium to large-sized devices such as automobiles, high output and large capacity are required. Therefore, medium to large-sized battery modules in which a number of battery cells are electrically connected are used. In addition, since these battery modules also have higher output and larger capacity, a number of them can be integrated to form a battery pack.

[0005] Figures 1 and 2 show the structure of a conventional battery module equipped with a thermally conductive resin. Referring to these, the conventional battery module (M) comprises a battery cell 1 and a module frame 2 that houses it. A thermally conductive resin 3, which hardens after the battery cell 1 is placed on it, is applied to the bottom plate 20 of the module frame 2.

[0006] The battery cell 1 can generate heat due to various causes, and this heat can degrade the performance of the battery cell 1. Therefore, it is important that the heat generated from the battery cell 1 is not confined within the module frame 2 but is released.

[0007] Figures 3 and 4 show a cross-section of the battery module in Figure 1. Referring to these figures, the thermally conductive resin 3, which has high thermal conductivity, hardens to connect the bottom surface of the battery cell 1 and the bottom plate 20, thereby fixing the battery cell 1 to the module frame 2, and allowing the heat generated in the battery cell 1 to be dissipated to the module frame 2.

[0008] On the other hand, the thermally conductive resin 3 and the base plate 20 are fixed to each other by the adhesive force generated when the thermally conductive resin 3 hardens. In these structures, if the thermally conductive resin 3 is subjected to a horizontal shear load or an upward tensile load in relation to the base plate 20, the thermally conductive resin 3 can easily detach from the base plate 20. This has a significant impact on the fixing and heat conduction between the battery cell 1 and the base plate 20, so it is essential to prevent the detachment of the thermally conductive resin 3. [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] The present invention was conceived against the background of the prior art described above, and aims to provide a battery module structure in which heat generated from the battery cell can be dissipated to the outside of the module housing.

[0010] Furthermore, the present invention aims to provide a battery module structure in which the bonding force between the thermally conductive resin and the module housing is strengthened, thereby firmly maintaining the mechanical fixation and linear connection between the battery cells and the module housing.

[0011] Specifically, the present invention aims to provide a battery module structure that prevents the thermally conductive resin from falling out of the module housing in the horizontal and / or vertical directions.

[0012] Another technical problem of the present invention is to provide a battery module structure in a battery pack containing multiple battery modules, in which heat generated from the battery modules can be dissipated to the outside of the pack housing.

[0013] The technical problems of the present invention are not limited to the purposes mentioned above. Other purposes and advantages of the present invention not mentioned can be understood from the following description and will be more clearly understood from the embodiments of the present invention. Furthermore, it will be readily understood that the purposes and advantages of the present invention can be achieved by the means and combinations thereof described in the claims. [Means for solving the problem]

[0014] To solve the aforementioned problems, the present invention provides a battery module structure comprising a battery cell, a module frame having a bottom plate on which the battery cell is placed, and a thermally conductive resin interposed between the bottom surface of the battery cell and the bottom plate, wherein the bottom plate is provided with perforated anchor portions arranged in a grid pattern of multiple rows and / or multiple columns, and the thermally conductive resin has an extended portion that extends downward and fills the anchor portions.

[0015] According to the present invention, the extended portion interferes horizontally with the anchor portion, allowing the thermal conductive resin to resist the shear load generated between it and the bottom plate, thereby preventing the thermal conductive resin from falling horizontally from the module frame.

[0016] Furthermore, according to the present invention, the contact area between the thermally conductive resin and the module housing can become larger than the planar area of ​​the bottom plate, and the rate at which heat is conducted from the thermally conductive resin to the module housing becomes faster.

[0017] Preferably, the anchor portions may be arranged in a grid pattern of three or more rows and three or more columns. Furthermore, the rows and columns of the anchor portions may be arranged at equal intervals. This allows each of the anchor portions to uniformly distribute the shear stress.

[0018] The anchor portion may include a first portion having a predetermined first inner width along one horizontal direction, and a second portion having a predetermined second inner width greater than the first inner width along the same horizontal direction, and located below the first portion. In other words, the anchor portion may include a first portion and a second portion located below the first portion, and the cross-sectional shape of the first portion does not have to include the entire cross-sectional shape of the second portion on a plane. This allows the extended portion to interfere with the first portion and the second portion from above, preventing the heat-conductive resin from falling upward from the bottom plate.

[0019] In one example, the anchor portion may include a first portion having a circular cross-section with a predetermined first inner diameter, and a second portion having a circular cross-section with a predetermined second inner diameter that is larger than the first inner diameter, and located below the first portion.

[0020] According to a first embodiment of the present invention, the first part may have a rectangular cross-section having a predetermined width and length and extending along one horizontal direction, and the second part may have a rectangular cross-section having the predetermined width and length and extending along another horizontal direction intersecting the first horizontal direction.

[0021] Alternatively, the anchor portion may include a tapered portion whose cross-sectional area becomes smaller towards the top. The tapered portion can prevent the thermally conductive resin from falling upward from the bottom plate by interfering with the extended portion from above.

[0022] In one example, the anchor portion may include a tapered portion having a circular cross-section whose inner diameter decreases upward.

[0023] According to the second embodiment of the present invention, the anchor portion may include a tapered portion having a frustum-shaped inner peripheral surface whose inner diameter decreases upward.

[0024] The thermally conductive resin may include an upper resin layer connected to the upper portion of the bottom plate and a bottom resin layer connected to the bottom portion of the bottom plate. At this time, the upper resin layer and the bottom resin layer may be connected by the extending portion. The bottom resin layer can prevent the entire thermally conductive resin from falling off upward from the bottom plate by interfering with the bottom surface of the bottom plate from above. Also, in this case, the thermally conductive resin can more effectively dissipate the heat generated from the battery cell to the outside of the module frame by connecting the upper and lower portions of the bottom plate.

[0025] According to still another aspect of the present invention, the anchor portion may be provided in a groove shape that sinks downward and is not in the form of holes arranged in a plurality of rows and / or columns of grids. Similar to the case where the anchor portion is in the form of holes, the extending portion of the thermally conductive resin interferes with the anchor portion in the horizontal direction, thereby preventing the thermally conductive resin from falling off horizontally from the module frame. The contact area between the thermally conductive resin and the module housing can be larger than the planar area of the bottom plate, and the rate of heat conduction from the thermally conductive resin to the module housing can be increased.

[0026] The anchor portion may be arranged in a grid pattern of 3 or more rows and 3 or more columns. Also, the rows and columns of the anchor portion may be arranged at equal intervals. Thereby, each of the anchor portions can uniformly share the shear stress.

[0027] However, the anchor portions do not necessarily have to be arranged in a grid pattern. For example, the anchor portions may have a groove shape extending along the length direction, or a plurality of these grooves may have a shape arranged in the width direction.

[0028] The anchor portion may include a first portion having a predetermined first inner width along one horizontal direction, and a second portion having a predetermined second inner width larger than the first inner width along the one horizontal direction and located below the first portion. In other words, the anchor portion may include a first portion and a second portion located below the first portion, and the shape of the cross section of the first portion may not include any of the shapes of the cross sections of the second portion on a plane. Thereby, the extending portion can interfere from above between the first portion and the second portion, and it is possible to prevent the thermally conductive resin from dropping upward from the bottom plate.

[0029] In one example, the anchor portion may include a first portion having a rectangular cross section extending along the length direction to a predetermined first inner width, and a second portion having a rectangular cross section extending along the length direction to a predetermined second inner width larger than the first inner width and located below the first portion.

[0030] Alternatively, the anchor portion may include a tapered portion whose cross-sectional area becomes thinner toward the upper side. The tapered portion can prevent the thermally conductive resin from dropping upward from the bottom plate by interfering with the extending portion from above.

[0031] In one example, the anchor portion includes a tapered portion having a rectangular cross section extending in the length direction and having a smaller inner width toward the upper side.

[0032] According to the third embodiment of the present invention, the anchor portion may include a tapered portion having a trapezoidal cross section extending in the length direction and having an upper width smaller than a lower width in the length direction.

[0033] <The present invention also provides a battery pack structure including the battery module.

[0034] The battery pack may include a pack frame on which the battery module is placed.

[0035] If the anchor portion has a hole that penetrates the bottom plate, the extended portion may be connected to the pack frame.

[0036] In this case, as in the second embodiment of the present invention, if the thermally conductive resin comprises the upper resin layer and the bottom resin layer, the bottom resin layer may be connected to the pack frame. Preferably, the bottom resin layer can connect the bottom surface of the bottom plate to the pack frame.

[0037] By connecting the thermally conductive resin to the pack frame, the heat generated from the battery cells is conducted to the module frame and then further conducted to the pack frame, making it easier to dissipate heat.

[0038] Furthermore, in this case, the anchoring effect of the anchor portion has the advantage of preventing the battery module from falling horizontally from the pack frame.

[0039] The present invention also provides an automobile structure including the battery pack. The battery pack can be installed in the automobile as a power source. The automobile may be an electric vehicle or a hybrid vehicle. The automobile may be a two-wheeled vehicle or a four-wheeled vehicle. However, the structure of the automobile is not limited to those described above, and the battery pack does not necessarily have to function as a power source for the automobile. [Effects of the Invention]

[0040] The present invention provides a battery module structure in which heat generated from the battery cells can be dissipated to the outside of the module housing by connecting the battery cells and the module housing in a row using a thermally conductive resin.

[0041] Furthermore, the present invention can provide a battery module structure in which the bonding force between the thermally conductive resin and the module housing is strengthened, thereby firmly maintaining the mechanical fixation and linear connection between the battery cells and the module housing.

[0042] Specifically, the present invention can provide a battery module structure in which the horizontal detachment of the thermal conductive resin from the module housing is prevented by interference between the downwardly extending portion of the thermal conductive resin and the anchor portion, and can also provide a battery module structure in which the vertical detachment of the thermal conductive resin from the module housing is prevented by the cross-sectional shape of the anchor portion.

[0043] Another advantage of the present invention is that, in a battery pack containing multiple battery modules, it is possible to provide a battery module structure in which heat generated from the battery cells extends through the module housing and can be dissipated to the outside of the pack housing via a thermally conductive resin connected to the pack housing.

[0044] Furthermore, the present invention can provide various other effects, which will be described in each embodiment, or, in cases where such effects can be easily inferred by an ordinary person, such descriptions will be omitted. [Brief explanation of the drawing]

[0045] [Figure 1] This diagram shows the structure of a conventional battery module equipped with a thermally conductive resin. [Figure 2] This diagram shows the structure of a conventional battery module equipped with a thermally conductive resin. [Figure 3] This figure shows a cross-section of the battery module shown in Figure 1. [Figure 4]This figure shows a cross-section of the battery module shown in Figure 1. [Figure 5] This figure shows the structure of a battery module according to the first embodiment of the present invention. [Figure 6] This figure shows the structure of a module frame according to the first embodiment of the present invention. [Figure 7] This figure shows the structure of a module frame according to the first embodiment of the present invention. [Figure 8] This figure shows the structure of a module frame according to the first embodiment of the present invention. [Figure 9] This figure shows a cross-section of a battery module according to the first embodiment of the present invention. [Figure 10] This figure shows a cross-section of a battery module according to the first embodiment of the present invention. [Figure 11] This figure shows the structure of a battery module according to a second embodiment of the present invention. [Figure 12] This figure shows the structure of a module frame according to a second embodiment of the present invention. [Figure 13] This figure shows the structure of a module frame according to a second embodiment of the present invention. [Figure 14] This figure shows the structure of a module frame according to a second embodiment of the present invention. [Figure 15] This figure shows a cross-section of a battery module according to a second embodiment of the present invention. [Figure 16] This figure shows a cross-section of a battery module according to a second embodiment of the present invention. [Figure 17] This figure shows the structure of a battery module according to a third embodiment of the present invention. [Figure 18] This figure shows the structure of a module frame according to a third embodiment of the present invention. [Figure 19] This figure shows the structure of a module frame according to a third embodiment of the present invention. [Figure 20] This figure shows the structure of a module frame according to a third embodiment of the present invention. [Figure 21] This figure shows a cross-section of a battery module according to a third embodiment of the present invention. [Figure 22] This figure shows a cross-section of a battery module according to a third embodiment of the present invention. [Figure 23] This figure shows a battery pack including a battery module according to a second embodiment of the present invention. [Figure 24] This figure shows a cross-section of the battery pack shown in Figure 23. [Figure 25] This figure shows a car with the battery pack shown in Figure 23 installed inside. [Modes for carrying out the invention]

[0046] The aforementioned objectives, features, and advantages will be described in detail below with reference to the attached drawings, so that a person with ordinary skill in the art to which the present invention pertains can easily implement the technical concept of the present invention. In describing the present invention, if a specific description of known technology according to the present invention is deemed to obscure the gist of the present invention, the detailed description will be omitted. Hereafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0047] Although terms such as "first," "second," etc., are used to indicate various components, these components are not limited by these terms. These terms are simply used to distinguish one component from another, and unless otherwise specified, the first component may also be the second component.

[0048] In the entire specification, unless otherwise stated, each component may be singular or plural.

[0049] Hereinafter, the placement of any configuration on the "upper (or lower)" or "above (or below)" of a component means not only that the configuration is placed in contact with the upper (or lower) surface of the component, but also that other configurations may be interposed between the component and any configuration placed on (or below) it.

[0050] Furthermore, when it is stated that one component is “linked,” “joined,” or “connected” to another component, it should be understood that the components may be directly linked or connected to one another, but may also be “interposed” between each component, or each component may be “linked,” “joined,” or “connected” through other components.

[0051] In this specification, singular expressions include plural expressions unless otherwise explicitly stated in the context. Terms such as “composed of” or “including” in this application should not be interpreted as necessarily including all of the multiple components or stages described in the specification, but rather as meaning that some of the components or stages may not be included, or that further components or stages may be included.

[0052] In the entire specification, "A and / or B" means A, B, or A and B unless otherwise specified, and "C to D" means C or greater and D or less unless otherwise specified.

[0053] The present invention relates to a battery module comprising battery cells and a module frame housing them, wherein a thermally conductive resin is provided to mechanically and linearly connect the battery cells and the module frame, thereby preventing the thermally conductive resin from falling off the module frame, and to the structure of a battery pack including the same.

[0054] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0055] [Battery module structure] The following describes the general structure of a battery module according to a preferred embodiment of the present invention with reference to Figures 5 to 10.

[0056] Figure 5 shows the structure of a battery module according to a first embodiment of the present invention. Referring thereto, a preferred embodiment of the present invention, the battery module (M), may include a battery cell 1 and a module frame 2 that houses it. The module frame 2 may include a bottom plate 20 on which the battery cell 1 is placed.

[0057] The battery cell 1 may be, but is not limited to, a cell stack in which a plurality of pouch-type battery cells are stacked in the width direction. In this case, when the battery cell 1 is composed of an assembly of a plurality of unit cells, a busbar assembly that electrically connects the unit cells may be connected to the battery cell 1.

[0058] The specific form of the module frame 2 can vary considerably, as long as it includes the bottom plate 20. For example, the module frame 2 according to one embodiment of the present invention may have an open shape on both sides and the top in the longitudinal direction, and the battery cell 1 may be housed in a module housing that includes the module frame 2, a pair of end plates covering both sides in the longitudinal direction thereof, and a top plate covering the top thereof. However, the structure of the battery module (M) according to the present invention is not limited thereto.

[0059] A thermally conductive resin 3 may be interposed between the battery cell 1 and the base plate 20. The thermally conductive resin 3 may be applied to the base plate 20 and hardened after the battery cell 1 is placed on it. In this way, the upper surface of the thermally conductive resin 3 may be formed to correspond to the bottom surface of the battery cell 1, and the thermally conductive resin 3 and the battery cell 1 may be firmly connected to each other.

[0060] Figures 6 to 8 show the structure of a module frame according to a first embodiment of the present invention. Referring to these drawings, the bottom plate 20 may be provided with an anchor portion 200 having a hole shape that penetrates the bottom plate 20 vertically, or a groove shape that is recessed downward from the upper surface of the bottom plate 20. The anchor portion 200 only needs to be a space that extends downward from the upper surface of the bottom plate 20, and its specific length, depth and / or cross-sectional shape are not limited.

[0061] Figures 9 and 10 show a cross-section of a battery module according to a first embodiment of the present invention. Referring to these drawings, the thermal conductive resin 3 may include an extended portion 30 that extends downward and fills the anchor portion 200. The extended portion 30 may be formed by the thermal conductive resin 3 being applied to the bottom plate 20 and curing, or by flowing into the anchor portion 200 and curing thereafter.

[0062] The vertically extending anchor portion 200 and the extending portion 30 can overlap each other horizontally. This allows the thermal conductive resin 3 and the module frame 2 to interfere with each other horizontally, preventing the thermal conductive resin 3 from detaching horizontally from the module frame 2. Furthermore, increasing the contact area between the thermal conductive resin 3 and the module frame 2 can strengthen the adhesion between the thermal conductive resin 3 and the module frame 2, and allow heat to be conducted more quickly between the thermal conductive resin 3 and the module frame 2.

[0063] [First Embodiment] The structure of the battery module according to the first embodiment of the present invention will be described in detail below with further reference to Figures 5 to 10.

[0064] Referring further to Figures 5 to 8, the anchor portion 200 may have a hole that penetrates the bottom plate 20.

[0065] The anchor portions 200 may be arranged in a grid pattern of multiple rows and / or multiple columns. Preferably, they may be arranged in a grid pattern of three or more rows and three or more columns. The rows and / or columns of the anchor portions 200 may also be arranged at equal intervals. This allows the extended portion 30 and the anchor portions 200 to share the shear stress uniformly, and prevents the thermal conductive resin 3 from escaping from the module frame 2 when the extended portion 30 breaks.

[0066] The anchor portion 200 in this embodiment may include a first portion 201 that occupies a predetermined height section, and a second portion 202 that is located below the first portion 201 and also occupies a predetermined height section.

[0067] According to this embodiment, the first part 201 may have a rectangular cross-section having a predetermined width and length and extending along one horizontal direction, and the second part 202 may have a rectangular cross-section having the predetermined width and length and extending along another horizontal direction intersecting the first horizontal direction.

[0068] Referring further to Figures 9 and 10, the first part 201 may have a predetermined first inner width (D1) along one horizontal direction, and the second part 202 may have a second inner width (D2) that is larger than the first inner width (D1) along the same horizontal direction. In this way, the cross-sectional shape of the second part 202 does not have to be completely included in the cross-sectional shape of the first part 201, and the extended part 30 may interfere from above with the first part 201 and the second part 202 by the anchor part 200. That is, the anchor part 200 has a shape that limits the upward displacement of the thermal conductive resin 3, thereby preventing the thermal conductive resin 3 from escaping upward from the bottom plate 20.

[0069] In one modified example, the first and second parts may each have a circular cross-section having a predetermined first inner diameter and a predetermined second inner diameter that is larger than the first inner diameter.

[0070] As in this embodiment, when the anchor portion 200 is formed in the shape of a hole that penetrates the bottom plate 20, the anchor portion 200 can be processed from both the upper and bottom surfaces of the bottom plate 20, which has the advantage of making it easy to process the first portion 201 and the second portion 202 into different shapes.

[0071] [Second Example] In the following, with reference to Figures 11 to 16, Figure 11 shows the structure of a battery module according to a second embodiment of the present invention, and Figures 12 to 14 show the structure of a module frame according to a second embodiment of the present invention. Referring to these drawings, the anchor portion 200 may have a hole that penetrates the bottom plate 20.

[0072] The anchor portions 200 may be arranged in a grid of multiple rows and / or columns. Preferably, they may be arranged in a grid of three or more rows and three or more columns. The rows and / or columns of the anchor portions 200 may also be arranged at equal intervals. This allows the extended portion 30 and the anchor portions 200 to share the shear stress uniformly, and prevents the thermal conductive resin 3 from escaping from the module frame 2 by the fracture of the extended portion 30.

[0073] The anchor portion 200 may include a tapered portion 203 whose cross-sectional area becomes narrower towards the top. The tapered portion 203 can interfere with the extended portion 30 from above. That is, the anchor portion 200 may have a shape that limits the upward displacement of the thermal conductive resin 3 by including the tapered portion 203, thereby preventing the thermal conductive resin 3 from escaping upward from the bottom plate 20.

[0074] The tapered portion 203 may, for example, have a circular cross-section that occupies a predetermined height section and whose inner diameter decreases as it goes upward. Specifically, the anchor portion 200 according to this embodiment may have a frustoconical inner surface whose inner diameter decreases as it goes upward.

[0075] Figures 15 and 16 show a cross-section of a battery module according to a second embodiment of the present invention. Referring to these drawings, the thermally conductive resin 3 may include an upper resin layer 31 connected to the upper part of the base plate 20 and a bottom resin layer 32 connected to the bottom of the base plate 20. The upper resin layer 31 and the bottom resin layer 32 may be connected to each other by the extended portion 30.

[0076] Even without the tapered portion 203, if the bottom resin layer 32 is provided, the bottom resin layer 32 can interfere with the bottom plate 20 from above, thereby preventing the entire thermal conductive resin 3 from falling upward from the bottom plate 20.

[0077] Furthermore, in this case, the thermally conductive resin 3 connects the upper and lower surfaces of the bottom plate 20, allowing the heat generated from the battery cell 1 to be more effectively dissipated to the outside of the module frame 2. In this embodiment, the larger the area of ​​the bottom resin layer 32 exposed to the outside of the module frame 2, the greater the heat dissipation effect can be expected.

[0078] As in this embodiment, when the anchor portion 200 is formed in the shape of a hole that penetrates the bottom plate 20, there is an advantage that the tapered portion 203 can be easily processed because it is not necessary to process the shape of the undercut in order to process the tapered portion 203.

[0079] [Third Embodiment] In the following, with reference to Figures 17 to 22, Figure 17 shows the structure of a battery module according to a third embodiment of the present invention, and Figures 18 to 20 show the structure of a module frame according to a third embodiment of the present invention. Referring to these drawings, the anchor portion 200 may have a groove-like shape that is recessed downward from the upper surface of the bottom plate 20.

[0080] The anchor portions 200 may be arranged in a grid pattern of multiple rows and / or multiple columns. Preferably, they may be arranged in a grid pattern of three or more rows and three or more columns. The rows and / or columns of the anchor portions 200 may also be arranged at equal intervals. This allows the extended portion 30 and the anchor portions 200 to share the shear stress uniformly, and prevents the thermal conductive resin 3 from escaping from the module frame 2 when the extended portion 30 breaks.

[0081] However, the anchor portions 200 do not necessarily have to be arranged in a grid pattern. For example, the anchor portions 200 in this embodiment may have grooves extending along the length direction, or a shape in which multiple such grooves are arranged in the width direction.

[0082] The anchor portion 200 may include a first portion 201 that occupies a predetermined height section, and a second portion 202 that is located below the first portion 201 and also occupies a predetermined height section.

[0083] In this case, the first part 201 may have a predetermined first inner width (D1) along one horizontal direction, and the second part 202 may have a second inner width (D2) that is larger than the first inner width (D1) along the same horizontal direction. As a result, the cross-sectional shape of the second part 202 does not have to be completely included in the cross-sectional shape of the first part 201, and the extended part 30 can interfere from above with the first part 201 and the second part 202 by the anchor part 200. That is, by having a shape that limits the upward displacement of the thermal conductive resin 3, it is possible to prevent the thermal conductive resin 3 from escaping upward from the bottom plate 20.

[0084] For example, the first and second parts may each have a rectangular cross-section extending along the length direction to a predetermined first inner width and a rectangular cross-section extending along the length direction to a predetermined second inner width that is larger than the first inner width.

[0085] Figures 21 and 22 show a cross-section of a battery module according to a third embodiment of the present invention. Referring to these drawings, the anchor portion 200 may include a tapered portion 203 whose cross-sectional area becomes narrower towards the top. The tapered portion 203 can interfere with the extended portion 30 from above. That is, the anchor portion 200 may have a shape that limits the upward displacement of the thermal conductive resin 3 by including the tapered portion 203, thereby preventing the thermal conductive resin 3 from escaping upward from the bottom plate 20.

[0086] The tapered portion 203 may, for example, have a rectangular cross-section that extends in the longitudinal direction and whose inner width decreases as it goes upward. Specifically, the anchor portion 200 according to this embodiment may include a tapered portion 203 that extends in the longitudinal direction and has a trapezoidal cross-section in which the upper width in the longitudinal direction is smaller than the lower width.

[0087] As in this embodiment, when the anchor portion 200 is formed in a groove shape, there is an advantage in that the structural rigidity of the bottom plate 20 can be maintained while achieving the effects of the present invention. In this case, in order to form the tapered portion 203, it is necessary to process the anchor portion 200 into an undercut shape, so it is preferable that the anchor portion 200 be processed to have a constant cross-section in the longitudinal direction, as in this embodiment.

[0088] [Battery pack including battery module] The following describes in detail the structure of a battery pack including a battery module according to a second embodiment of the present invention, with reference to Figures 23 and 24. However, it will be clear from the following description that the structures of these battery packs are also effective in battery packs including battery modules according to other embodiments of the present invention.

[0089] Figure 23 shows a battery pack including a battery module according to a second embodiment of the present invention. Referring to this, a plurality of the battery modules (M) can be directly housed in a pack frame (PF) to constitute a battery pack (P). In this case, the battery modules (M) can be electrically connected to each other in series and / or parallel to constitute a higher voltage and / or higher capacity battery.

[0090] Figure 24 shows a cross-section of the battery pack shown in Figure 23. Referring to this, if the anchor portion 200 has a hole that penetrates the bottom plate 20, the thermal conductive resin 3 may be connected to the pack frame (PF).

[0091] For example, in this case, the lower end of the extended portion 30 may be connected to the pack frame (PF).

[0092] Alternatively, as in the second embodiment of the present invention, if the thermally conductive resin 3 comprises the upper resin layer 31 and the bottom resin layer 32, the bottom resin layer 32 may be connected to the pack frame (PF). Preferably, the bottom resin layer 32 can connect the bottom surface of the bottom plate 20 to the pack frame (PF). As a result, the bottom of the battery cell 1 and the bottom of the battery module (M) may both be connected in a row to the pack frame (PF).

[0093] By connecting the thermally conductive resin 3 to the pack frame (PF), the heat generated from the battery cell 1 can be conducted to the module frame 2, and then further conducted to the pack frame (PF) to be dissipated to the outside.

[0094] Furthermore, in this case, the anchoring effect of the anchor portion 200 also has the advantage of preventing the battery module (M) from falling horizontally from the pack frame (PF).

[0095] Figure 25 shows an automobile incorporating the battery pack of Figure 23. Referring to this, the battery pack (P) can be incorporated into an automobile (V) as a power source. The automobile (V) may, but is not limited to, a hybrid automobile or an electric automobile. Furthermore, the automobile (V) may, but is not limited to, a two-wheeled vehicle or a four-wheeled vehicle.

[0096] The embodiments described above are illustrative and not limiting, and the scope of the present invention is indicated more by the claims described below than by the detailed description above. Furthermore, the meaning and scope of the claims described below, as well as any modifiable and transformable forms conceived from their equivalent concepts, should all be interpreted as being included within the scope of the present invention.

[0097] As described above, the present invention has been explained with reference to the illustrative drawings, but it is clear that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications can be made by a person skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described in the embodiments described above, it is natural that the effects that can be predicted by such configuration should also be recognized. [Explanation of Symbols]

[0098] 1 battery cell 2 Module Frames 20 Bottom plate 200 Anchor section 201 Part 1 202 Part 2 203 Tapered section 3. Thermally conductive resin 30 Extension 31 Upper resin layer 32 Bottom resin layer M Battery Module P Battery Pack PF Pack Frame V Automobile D1 First inner width (first inner diameter) D2 2nd inner width (2nd inner diameter)

Claims

1. Battery cell and A module frame comprising a bottom plate on which the battery cells are placed, A thermally conductive resin interposed between the bottom surface of the battery cell and the bottom plate, In a battery module including, The bottom plate is provided with perforated anchor portions arranged in a grid pattern of multiple rows and / or multiple columns. The thermally conductive resin has an extended portion that extends downward and fills the anchor portion, The extended portion includes a shape that interferes with the anchor portion in the horizontal direction. Battery module.

2. The anchor portion is arranged in a grid pattern of three or more rows and three or more columns. The battery module according to claim 1.

3. The rows and columns of the aforementioned anchor section are arranged at equal intervals. The battery module according to claim 1.

4. The anchor portion includes a first portion having a predetermined first inner width along one horizontal direction, and a second portion having a predetermined second inner width greater than the first inner width along one horizontal direction and located below the first portion. A battery module according to any one of claims 1 to 3.

5. The anchor portion includes a first portion having a circular cross-section with a predetermined first inner diameter, and a second portion having a circular cross-section with a predetermined second inner diameter larger than the first inner diameter, and located below the first portion. A battery module according to any one of claims 1 to 3.

6. The aforementioned anchor portion includes a tapered portion whose cross-sectional area becomes narrower towards the top. A battery module according to any one of claims 1 to 3.

7. The anchor portion includes a tapered portion having a circular cross-section whose inner diameter decreases as it goes upwards. The battery module according to claim 6.

8. The anchor portion includes a tapered portion having a frustoconical inner surface whose inner diameter decreases as it goes upwards. The battery module according to claim 7.

9. The aforementioned thermally conductive resin is An upper resin layer connected to the upper part of the bottom plate, A bottom resin layer connected to the bottom of the aforementioned bottom plate, Includes, The extended portion connects the upper resin layer and the bottom resin layer via the anchor portion. A battery module according to any one of claims 1 to 3.

10. In a battery pack including the battery module described in claim 9, Includes a pack frame on which the battery module is placed, The bottom resin layer connects the bottom surface of the bottom plate and the pack frame. Battery pack.

11. Battery cell and A module frame comprising a bottom plate on which the battery cells are placed, A thermally conductive resin interposed between the bottom surface of the battery cell and the bottom plate, In a battery module including, The bottom plate is provided with a grid of multiple rows and / or columns, and recessed groove-shaped anchor portions at the bottom. The thermally conductive resin has an extended portion that extends downward and fills the anchor portion, The extended portion includes a shape that interferes with the anchor portion in the horizontal direction. Battery module.

12. The anchor portion is arranged in a grid pattern of three or more rows and three or more columns. A battery module according to claim 11.

13. The rows and columns of the aforementioned anchor section are arranged at equal intervals. A battery module according to claim 11.

14. The anchor portion includes a first portion having a predetermined first inner width along one horizontal direction, and a second portion having a predetermined second inner width greater than the first inner width along one horizontal direction and located below the first portion. A battery module according to any one of claims 11 to 13.

15. The anchor portion includes a first portion having a rectangular cross-section extending along the length direction to a predetermined first inner width, and a second portion having a rectangular cross-section extending along the length direction to a predetermined second inner width that is larger than the first inner width, and located below the first portion. A battery module according to any one of claims 11 to 13.

16. The aforementioned anchor portion includes a tapered portion whose cross-sectional area becomes narrower towards the top. A battery module according to any one of claims 11 to 13.

17. The anchor portion includes a tapered portion having a rectangular cross-section that extends in the longitudinal direction and whose inner width decreases as it goes upward. A battery module according to claim 16.

18. The anchor portion extends in the longitudinal direction and includes a tapered portion having a trapezoidal cross-section in the longitudinal direction, where the upper width is smaller than the lower width. A battery module according to claim 17.

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