Battery device

Abstract

The technical idea of the present invention provides a battery device comprising: a first frame; a plurality of battery cells provided on the first frame; and a side pad disposed between the plurality of battery cells, wherein the side pad includes: an outer body in contact with the plurality of battery cells; an inner body provided in the inner space of the outer body; and a thermally expandable layer extending along the inner body and containing a thermally expandable material.

Description

Battery device

[0001] The present invention relates to a battery device.

[0002] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2024-0071340, filed May 31, 2024, and all contents of the document in that Republic of Korea Patent Application are incorporated herein by reference.

[0003] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as a power source for various wireless devices, including handsets, laptops, and cordless vacuum cleaners. Recently, improved energy density and economies of scale have dramatically reduced the per-unit manufacturing cost of secondary batteries. Furthermore, as the range of battery electric vehicles (BEVs) has increased to match that of fuel-powered vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility.

[0004] As secondary batteries become increasingly used in mobility, demand for their safety is increasing. Fires and other accidents involving secondary batteries used in mobility vehicles can endanger the lives of drivers, making research into technologies that enhance secondary battery safety essential.

[0005] The technical problem to be solved by the present invention is to provide a battery device.

[0006] In order to solve the above-described problem, the technical idea of ​​the present invention provides a battery device including: a first frame; a plurality of battery cells provided on the first frame; and a side pad disposed between the plurality of battery cells; wherein the side pad includes: an outer body in contact with the plurality of battery cells; an inner body provided within an inner space of the outer body; and a thermal foam layer extending along the inner body and containing a thermal foam material.

[0007] In exemplary embodiments, the outer body comprises a pair of side walls, and the inner body is characterized by extending between the pair of side walls of the outer body.

[0008] In exemplary embodiments, the outer body and the inner body are characterized in that they comprise the same metal.

[0009] In exemplary embodiments, the thermoplastic material is characterized by comprising expanded graphite.

[0010] In exemplary embodiments, the device further comprises a first thermally conductive adhesive layer that attaches the plurality of battery cells to the first frame.

[0011] In exemplary embodiments, the device further comprises a first thermally conductive adhesive layer that attaches the plurality of battery cells to the first frame, wherein the bottom wall of the outer body facing the first thermally conductive adhesive layer includes a through hole that communicates with the internal space of the outer body.

[0012] In exemplary embodiments, the inner body is characterized by including a plurality of holes.

[0013] In exemplary embodiments, the thermal foam layer is characterized by having a mesh structure.

[0014] In exemplary embodiments, the thermal foam layer is characterized by extending further along the inner surface of the outer body.

[0015] In exemplary embodiments, the first frame is characterized by including a cooling channel configured to allow a cooling fluid to flow therethrough.

[0016] In exemplary embodiments, the device further comprises a second frame provided on the plurality of battery cells, wherein the side pad comprises an extension connected to the second frame.

[0017] In exemplary embodiments, the invention further comprises a second thermally conductive adhesive layer provided between the second frame and the extension portion of the side pad, the second thermally conductive adhesive layer attaching the extension portion of the side pad to the second frame.

[0018] In exemplary embodiments, the second frame is characterized by including a cooling channel configured to allow a cooling fluid to flow therethrough.

[0019] According to the battery device according to exemplary embodiments of the present invention, side pads configured to dissipate heat are arranged between the battery cells, so that cooling performance for the battery cells can be improved.

[0020] According to exemplary embodiments of the present invention, a battery device includes a side pad disposed between battery cells, which includes a thermal foam layer containing a thermal foam material, thereby preventing or suppressing heat generated in a battery cell where a thermal event has occurred from being transferred to other battery cells. Since heat transfer between battery cells and chain reactions of fire among battery cells can be prevented or suppressed, the safety and reliability of the battery device can be improved.

[0021] The effects that can be obtained from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure pertain from the following description. In other words, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0022] FIG. 1 is a cross-sectional view showing a battery device according to exemplary embodiments of the present invention.

[0023] Figure 2 is an enlarged view showing the area indicated by “Ⅱ” in Figure 1.

[0024] Figure 3 is a cross-sectional view showing a battery device in which a thermal event has occurred.

[0025] FIG. 4 is a cross-sectional view showing a portion of a battery device according to exemplary embodiments of the present invention.

[0026] Figure 5 is a cross-sectional view showing a battery device in which a thermal event has occurred.

[0027] FIG. 6 is a cross-sectional view showing a portion of a battery device according to exemplary embodiments of the present invention.

[0028] FIG. 7 is a cross-sectional view showing a portion of a side pad according to exemplary embodiments of the present invention.

[0029] FIG. 8 is a cross-sectional view showing a portion of a battery device according to exemplary embodiments of the present invention.

[0030] FIG. 9 is a cross-sectional view showing a portion of a battery device according to exemplary embodiments of the present invention.

[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0032] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0033] In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0034] Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for clearer explanation. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes or proportions.

[0035]

[0036] (Example 1)

[0037] Fig. 1 is a cross-sectional view showing a battery device (10) according to exemplary embodiments of the present invention. Fig. 2 is an enlarged view showing the area indicated by "Ⅱ" in Fig. 1.

[0038] Referring to FIGS. 1 and 2, a battery device (10) may include a housing (500) and a cell assembly (100). The battery device (10) may correspond to a battery pack or a battery module.

[0039] The housing (500) can provide an internal space for accommodating a cell assembly (100). One or more cell assemblies (100) can be accommodated in the internal space of the housing (500). The housing (500) can include a base frame (510), a side frame (520), a top frame (530), and a plurality of internal frames (550).

[0040] A base frame (510) can support a cell assembly (100). The base frame (510) can have a flat plate shape extending in a first horizontal direction (e.g., X direction) and a second horizontal direction (e.g., Y direction). On the base frame (510), a plurality of cell assemblies (100) arranged in a first horizontal direction (e.g., X direction) and a second horizontal direction (e.g., Y direction) can be provided.

[0041] The base frame (510) may include a cooling channel (511) configured to allow a cooling fluid to flow. Cooling fluid supplied from the outside of the base frame (510) may be supplied to an inlet of the cooling channel (511), flow along the cooling channel (511), and discharged to the outside through an outlet of the cooling channel (511). While the cooling fluid flows along the cooling channel (511), cooling of the cell assembly (100) may be achieved. The cooling fluid may include coolant and / or refrigerant. The housing (500) may be equipped with a pipe configured to deliver the cooling fluid to the cooling channel (511) of the base frame (510). The cooling fluid supplied from the outside may be delivered to the cooling channel (511) of the base frame (510) through the pipe.

[0042] The side frame (520) can extend along the perimeter of the base frame (510) and surround the cell assembly (100).

[0043] A top frame (530) may be fastened to the side frames (520) to cover a plurality of cell assemblies (100). The top frame (530) may have a flat plate shape extending in a first horizontal direction (e.g., X direction) and a second horizontal direction (e.g., Y direction). The top frame (530) may be spaced apart from the cell assemblies (100) in a vertical direction (e.g., Z direction).

[0044] A plurality of inner frames (550) can partition the inner space of the housing (500) into a plurality of receiving spaces. One or more cell assemblies (100) can be arranged in each of the plurality of receiving spaces of the housing (500) defined by the plurality of inner frames (550). In exemplary embodiments, the plurality of inner frames (550) can be spaced apart from each other in a first horizontal direction (e.g., X-direction), and each inner frame (550) can extend in a second horizontal direction (e.g., Y-direction). A single cell assembly (100) can be arranged between a pair of inner frames (550). Each inner frame (550) can contact a side surface of a cell assembly (100).

[0045] The cell assembly (100) can be mounted on a base frame (510). The cell assembly (100) can include a plurality of battery cells (110) and a plurality of side pads (130).

[0046] An individual battery cell (110) is a basic unit of a lithium ion battery, i.e., a secondary battery. An individual battery cell (110) may include an electrode assembly, an electrolyte, and a cell case. The electrode assembly built into the cell case may include a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. The electrode assembly may be either a jelly-roll type or a stack type depending on the assembly form. A jelly-roll type electrode assembly may include a winding structure of a positive electrode, a negative electrode, and a separator interposed therebetween. A stack type electrode assembly may include a plurality of sequentially stacked positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed therebetween. The positive electrode may include a positive electrode current collector and a positive electrode active material. The negative electrode may include a negative electrode current collector and an negative electrode active material.

[0047] Each battery cell (110) may be a pouch-type battery cell, a cylindrical battery cell, or a square battery cell. The electrode assembly of the pouch-type battery cell is housed in a pouch case including an aluminum laminate sheet. The electrode assembly of the cylindrical battery cell is housed in a cylindrical metal can. The electrode assembly of the square battery cell is housed in a square metal can.

[0048] A plurality of battery cells (110) provided in the cell assembly (100) may be connected in series and / or in parallel. For example, the plurality of battery cells (110) may be connected in series with each other. For example, the plurality of battery cells (110) may also be connected in parallel with each other. For example, when a set of two or more battery cells (110) connected in parallel with each other is defined as a bank, one bank composed of two or more battery cells (110) connected in parallel with each other and another bank composed of two or more battery cells (110) connected in parallel with each other may be connected in series.

[0049] In exemplary embodiments, a plurality of battery cells (110) provided in a cell assembly (100) may be arranged in a first horizontal direction (e.g., X-direction), and individual battery cells (110) may extend in a second horizontal direction (e.g., Y-direction). An electrode lead may be provided at at least one of both ends of an individual battery cell (110) along the second horizontal direction (e.g., Y-direction). Electrode leads of neighboring battery cells (110) among the plurality of battery cells (110) may be electrically and physically connected to each other.

[0050] The cell assembly (100) may include a busbar frame connected to the side of a plurality of battery cells (110). A busbar frame may be arranged at each of the two ends of the cell assembly (100) along a second horizontal direction (e.g., Y direction). The busbar frame may support the busbars and the electrode leads of the battery cells (110). The busbars may be electrically and physically connected to at least one of the electrode leads of the plurality of battery cells (110). The busbar may be joined to at least one of the electrode leads of the plurality of battery cells (110) by welding.

[0051] A plurality of side pads (130) may be arranged on a base frame (510) and may be arranged in a first horizontal direction between a pair of inner frames (550). Each of the plurality of side pads (130) may contact a side surface of a corresponding battery cell (110) among the plurality of battery cells (110). The plurality of side pads (130) may be spaced apart from each other in a first horizontal direction (e.g., X direction) with at least one battery cell (110) therebetween. At least one battery cell (110) may be arranged between two adjacent side pads (130). The side pads (130) may have a flat plate shape that extends continuously in approximately a second horizontal direction (e.g., Y direction) and a vertical direction (e.g., Z direction). At least one of both side surfaces of the side pads (130) may contact the battery cell (110). The side pad (130) can be attached to the corresponding battery cell (110) by an adhesive material such as double-sided tape or adhesive.

[0052] Each side pad (130) can support a corresponding battery cell (110) in a first horizontal direction. Each side pad (130) can support a corresponding battery cell (110) in the first horizontal direction, thereby suppressing or preventing deformation of the battery cell (110).

[0053] The side pad (130) may include an outer body (131) and an inner body (133).

[0054] The outer body (131) can form the outer appearance of the side pad (130) and provide an inner space (132). The outer body (131) can include a pair of side walls (141) facing in a first horizontal direction, a bottom wall (142) facing the base frame (510), and a top wall (143) facing the top frame (530). The pair of side walls (141) of the outer body (131) can have a flat plate shape that continuously extends in a second horizontal direction (e.g., Y direction) and a vertical direction (e.g., Z direction), respectively. One of the pair of side walls (141) of the outer body (131) can contact a battery cell (110) on one side of the side pad (130), and the other of the pair of side walls (141) can contact a battery cell (110) on the other side of the side pad (130). The bottom wall (142) may be connected to the lower end of each of the pair of side walls (141), and the upper wall (143) may be connected to the upper end of each of the pair of side walls (141). The outer body (131) may include a material having excellent thermal conductivity, and in the present disclosure, the outer body (131) may be referred to as a thermally conductive outer body.

[0055] An inner body (133) may be provided within an inner space (132) of an outer body (131). The inner body (133) may have a flat plate shape extending between a pair of side walls (141) of the outer body (131). Since the pair of side walls (141) of the outer body (131) are supported by the inner body (133), the rigidity of the side pad (130) may be enhanced. In exemplary embodiments, the side pad (130) may include a plurality of inner bodies (133) spaced apart from each other in a vertical direction. The inner bodies (133) may include a material having excellent thermal conductivity, and in the present disclosure, the inner bodies (133) may be referred to as thermally conductive inner bodies.

[0056] The side pad (130) can be thermally coupled to the corresponding battery cell (110). Heat generated in the battery cell (110) can be dissipated through the outer body (131) and the inner body (133) of the side pad (130). Since the side pad (130) is arranged to dissipate heat between the battery cells (110), cooling performance for the battery cells (110) can be improved.

[0057] The outer body (131) and the inner body (133) of the side pad (130) may include a material having excellent thermal conductivity, for example, a metal. For example, the side pad (130) may include aluminum, silver, gold, copper, tungsten, or a combination thereof. In exemplary embodiments, the outer body (131) and the inner body (133) may include the same material or the same metal. In exemplary embodiments, in each side body, the outer body (131) and the inner body (133) may be formed integrally with each other to form a single integrated structure. In some exemplary embodiments, the material of the outer body (131) and the material of the inner body (133) may be different from each other.

[0058] The side pad (130) may include a thermal foam layer (135) provided within the internal space (132) of the outer body (131). The thermal foam layer (135) may include a thermal foam material. The thermal foam material may be configured to have fire resistance and to expand in volume above a specific temperature. When a thermal event such as ignition and / or thermal runaway of a battery cell (110) occurs in the battery device (10), the thermal foam material of the thermal foam layer (135) expands, and the expanded thermal foam material may form an insulating layer to thermally isolate the battery cell (110) in which the thermal event occurred from other battery cells (110).

[0059] In exemplary embodiments, the thermal foam layer (135) may be applied on the surface of the inner body (133). The thermal foam layer (135) may extend conformally along the surface of the inner body (133). The thermal foam layer (135) may completely or partially cover the surface of the inner body (133).

[0060] In exemplary embodiments, the thermal foaming material of the thermal foaming layer (135) may include expanded graphite, vermiculite, or a combination thereof.

[0061] In exemplary embodiments, the thermal foam layer (135) may include a base layer and thermal foam particles contained in the base layer. The base layer may be made of a polymer, such as polyurethane or silicone. The thermal foam particles may be particles or capsules containing a thermal foam material.

[0062] In exemplary embodiments, the thermal foaming material of the thermal foaming layer (135) may be configured to expand between 10 and 50 times its volume when the foaming initiation temperature is exceeded. The foaming initiation temperature may be 100°C or higher, 200°C or higher, 300°C or higher, 400°C or higher, or 500°C or higher.

[0063] A first thermally conductive adhesive layer (210) may be disposed between the base frames (510) of the cell assembly (100). The first thermally conductive adhesive layer (210) may attach a plurality of battery cells (110) to the base frame (510). An upper portion of the first thermally conductive adhesive layer (210) may be in direct contact with each of the plurality of battery cells (110), and a lower portion of the first thermally conductive adhesive layer (210) may be in direct contact with the base frame (510). The first thermally conductive adhesive layer (210) may thermally couple each of the plurality of battery cells (110) to the base frame (510). The first thermally conductive adhesive layer (210) may include a thermal resin and / or a thermal interface material.

[0064] Additionally, the first thermally conductive adhesive layer (210) may contact the bottom wall (142) of the outer body (131) of the side pad (130) and thermally and physically couple the side pad (130) to the base frame (510). In exemplary embodiments, the outer body (131) of the side pad (130) may be thermally coupled to the base frame (510) by the first thermally conductive adhesive layer (210), and heat generated in the battery cell (110) may be transferred to the base frame (510) through the side pad (130).

[0065] Figure 3 is a cross-sectional view showing a battery device (10) in which a thermal event has occurred.

[0066] Referring to FIG. 3, when a thermal event such as ignition of a battery cell (110) occurs in the battery device (10), the thermal foam material of the thermal foam layer (135) of the side pad (130) surrounding the battery cell (110P) where the thermal event occurred expands, and the expanded thermal foam material can form an insulating layer (191) that at least partially fills the internal space (132) of the outer body (131) of the side pad (130). The insulating layer (191) can prevent or suppress heat generated in the battery cell (110P) where the thermal event occurred from being transferred to other battery cells (110). Since heat transfer between battery cells (110) and chain ignition of the battery cells (110) can be prevented or suppressed, the safety and reliability of the battery device (10) can be improved.

[0067]

[0068] (Example 2)

[0069] FIG. 4 is a cross-sectional view illustrating a portion of a battery device according to exemplary embodiments of the present invention. FIG. 5 is a cross-sectional view illustrating a battery device in which a thermal event has occurred. Below, the battery devices of FIGS. 4 and 5 will be described, focusing on differences from the battery device (10) described with reference to FIGS. 1 and 2.

[0070] Referring to FIGS. 4 and 5, the bottom wall (142) of the outer body (131) of the side pad (130A) may face the first thermally conductive adhesive layer (210), and the bottom wall (142) of the outer body (131) of the side pad (130A) may include a through hole (1421). The through hole (1421) provided in the bottom wall (142) of the outer body (131) may communicate with the internal space (132) of the outer body (131).

[0071] As illustrated in FIG. 5, when a thermal event occurs in the battery device, the thermal foam material of the thermal foam layer (135) of the side pad (130A) around the battery cell (110P) where the thermal event occurred expands, and the expanded thermal foam material can be discharged to the outside of the external body (131) through the through hole (1421) of the external body (131). In addition, the first thermally conductive adhesive layer (210) around the battery cell (110P) where the thermal event occurred can be thermally deformed to form an empty space and / or cavity, and the empty space and / or cavity formed by the thermal deformation of the first thermally conductive adhesive layer (210) can be filled with the expanded thermal foam material to form an insulating layer (192). Since heat transfer between the battery cell (110P) where a thermal event has occurred and the base frame (510) is suppressed or blocked by the insulating layer (192), heat generated in the battery cell (110P) where a thermal event has occurred can be prevented or suppressed from being transferred to other battery cells (110) through the base frame (510). Since heat transfer between battery cells (110) and chain ignition of the battery cells (110) can be prevented or suppressed, the safety and reliability of the battery device can be improved.

[0072]

[0073] (Example 3)

[0074] FIG. 6 is a cross-sectional view illustrating a portion of a battery device according to exemplary embodiments of the present invention. Below, the battery device of FIG. 6 will be described, focusing on differences from the battery device (10) described with reference to FIGS. 1 and 2.

[0075] Referring to FIG. 6, the inner body (133) of the side pad (130B) may include at least one hole (1331). The at least one hole (1331) of the inner body (133) may vertically penetrate the inner body (133). In exemplary embodiments, the inner body (133) of the side pad (130B) may include a plurality of holes (1331) arranged in a one-dimensional array or a two-dimensional array. When the thermal foaming material of the thermal foaming layer (135) is expanded, the expanded thermal foaming material may move in a vertical direction through the hole (1331) of the inner body (133). Since the inner body (133) has a hole (1331) that allows movement of the expanded thermal foam material, when a thermal event occurs within the battery device, an insulating layer (see 191 in FIG. 3) filling the inner space (132) of the outer body (131) of the side pad (130B) can be formed more quickly.

[0076]

[0077] (Example 4)

[0078] Fig. 7 is a cross-sectional view showing a portion of a side pad (130C) according to exemplary embodiments of the present invention. Hereinafter, the side pad (130C) of Fig. 7 will be described, focusing on differences from the side pad (130) of the battery device (10) described with reference to Figs. 1 and 2.

[0079] Referring to Fig. 7, the thermal foam layer (135A) of the side pad (130C) may have a mesh structure, a net structure, or a grid structure. The thermal foam layer (135A) may include a plurality of holes (1351). The plurality of holes (1351) of the thermal foam layer (135A) may be arranged in a first horizontal direction (e.g., X direction) and a second horizontal direction (e.g., Y direction). When viewed in a plan view, the plurality of holes (1351) of the thermal foam layer (135A) may be polygonal, such as circular or rectangular.

[0080] In exemplary embodiments, the inner body (133A) may have a mesh structure, a net structure, or a grid structure. The inner body (133A) may include a plurality of holes. For example, the thermal foam layer (135A) of the side pad (130C) may be applied to the inner body (133A) having a mesh structure, and may have a mesh structure corresponding to the mesh structure of the inner body (133A).

[0081]

[0082] (Example 5)

[0083] FIG. 8 is a cross-sectional view illustrating a portion of a battery device according to exemplary embodiments of the present invention. Below, the battery device of FIG. 8 will be described, focusing on differences from the battery device (10) described with reference to FIGS. 1 and 2.

[0084] Referring to FIG. 8, in the side pad (130D), the thermal foam layer (135B) may extend further along the inner surface of the outer body (131) defining the inner space (132). The thermal foam layer (135B) may extend conformally along the inner surface of the outer body (131). The thermal foam layer (135B) may cover the entire or partial inner surface of the outer body (131).

[0085]

[0086] (Example 6)

[0087] FIG. 9 is a cross-sectional view illustrating a portion of a battery device (10A) according to exemplary embodiments of the present invention. Hereinafter, the battery device (10A) of FIG. 9 will be described, focusing on differences from the battery device (10) described with reference to FIGS. 1 and 2.

[0088] Referring to FIG. 9, in the battery device (10A), the housing (500) may include a cooling frame (560) disposed on the cell assembly (100A). The cooling frame (560) may be disposed on a plurality of battery cells (110) and a plurality of side pads (130E). The cooling frame (560) may include a cooling channel (561) configured to allow a cooling fluid to flow. The cooling fluid may include coolant and / or a refrigerant. An externally supplied cooling fluid may flow along the cooling channel (561) of the cooling frame (560) and then be discharged to the outside. While the cooling fluid flows along the cooling channel (561) of the cooling frame (560), cooling of the battery cells (110) may be achieved.

[0089] Each of the plurality of side pads (130E) may include an extension portion (137) that contacts the cooling frame (560). In each side pad (130E), the extension portion (137) may extend upward from the upper wall (143) of the outer body (131). The extension portion (137) may be integral with the outer body (131) and may include the same material as the outer body (131).

[0090] A plurality of side pads (130E) may be coupled to the cooling frame (560) via a second thermally conductive adhesive layer (220). The second thermally conductive adhesive layer (220) may be interposed between each of the extension portions (137) of the plurality of side pads (130E) and the cooling frame (560). The second thermally conductive adhesive layer (220) may extend along the extension portions (137) of the plurality of side pads (130E). The second thermally conductive adhesive layer (220) may be spaced apart from the plurality of battery cells (110) with the extension portions (137) of the plurality of side pads (130E) interposed therebetween. An upper portion of the second thermally conductive adhesive layer (220) may be in direct contact with the cooling frame (560), and a lower portion of the second thermally conductive adhesive layer (220) may be in direct contact with the extension portions (137) of the plurality of side pads (130E). The battery cells (110) may be thermally coupled to the cooling frame (560) through the plurality of side pads (130E) and the second thermally conductive adhesive layer (220). The second thermally conductive adhesive layer (220) may include a thermal resin and / or a thermal interface material.

[0091] The present invention has been described in more detail through drawings and examples. However, the configurations described in the drawings or examples described in this specification are merely embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

Claims

1. First frame; a plurality of battery cells provided on the first frame; and Side pads arranged between the plurality of battery cells; Including, The above side pads are, An external body in contact with the plurality of battery cells; an inner body provided within the inner space of the outer body; and A thermal foam layer extending along the inner body and containing a thermal foaming material; A battery device comprising:

2. In paragraph 1, The above outer body comprises a pair of side walls, A battery device characterized in that the inner body extends between the pair of side walls of the outer body.

3. In paragraph 1, A battery device characterized in that the outer body and the inner body comprise the same metal.

4. In paragraph 1, A battery device characterized in that the above-mentioned thermal foam material comprises expanded graphite.

5. In paragraph 1, A first thermally conductive adhesive layer attaching the plurality of battery cells to the first frame; A battery device characterized by further comprising:

6. In paragraph 1, Further comprising a first thermally conductive adhesive layer for attaching the plurality of battery cells to the first frame, A battery device characterized in that the bottom wall of the outer body facing the first thermally conductive adhesive layer includes a through hole communicating with the inner space of the outer body.

7. In paragraph 1, A battery device characterized in that the inner body includes a plurality of holes.

8. In paragraph 1, A battery device characterized in that the above-mentioned thermal foam layer has a mesh structure.

9. In paragraph 1, A battery device characterized in that the thermal foam layer extends further along the inner surface of the outer body.

10. In paragraph 1, A battery device characterized in that the first frame includes a cooling channel configured to allow a cooling fluid to flow.

11. In paragraph 1, Further comprising a second frame provided on the plurality of battery cells, A battery device characterized in that the side pad includes an extension connected to the second frame.

12. In paragraph 11, A battery device characterized in that it further includes a second thermally conductive adhesive layer provided between the second frame and the extension portion of the side pad, and attaching the extension portion of the side pad to the second frame.

13. In paragraph 11, A battery device characterized in that the second frame includes a cooling channel configured to allow cooling fluid to flow.

Images