Battery device

Abstract

The present invention provides a battery device comprising: a housing comprising a base frame and a top frame; a plurality of battery cells, the plurality of battery cells being disposed on the base frame; a top pad covering the plurality of battery cells and contacting the plurality of battery cells; and a flame retardant cover attached to the top pad and spaced apart from the top frame, with an exhaust space therebetween.

Description

Technical Field

[0001] This disclosure relates to a battery device.

[0002] This application claims the benefit of Korean Patent Application No. 10-2024-0060532, filed on May 8, 2024, the disclosure of which is incorporated herein by reference. Background Technology

[0003] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as an energy source for various wireless devices, such as mobile phones, laptops, and cordless vacuum cleaners. Recently, due to improvements in energy density and economies of scale, the manufacturing cost per unit capacity of secondary batteries has significantly decreased. As the driving range of battery electric vehicles (BEVs) has increased to levels comparable to fuel cell vehicles, the primary use of secondary batteries has shifted from mobile devices to mobility.

[0004] As secondary batteries are used in mobility applications, the need for their safety is increasing. Accidents such as fires involving secondary batteries used in mobility applications can endanger the lives of drivers. Therefore, research into technologies to improve the safety of secondary batteries is essential. Summary of the Invention

[0005] Technical issues

[0006] The technical problem this disclosure aims to solve is to provide a battery device.

[0007] Technical solution

[0008] To address the aforementioned problems, the present disclosure provides a battery device comprising: a housing including a base frame and a top frame; a plurality of battery cells disposed on the base frame; a top pad covering and contacting the plurality of battery cells; and a flame-retardant cover attached to the top pad and spaced apart from the top frame, wherein a venting space is provided between the flame-retardant cover and the top frame.

[0009] In an exemplary embodiment, the flame-retardant cover includes a support frame with a plurality of vent holes, wherein the top pad covers the plurality of vent holes of the support frame.

[0010] In an exemplary embodiment, the flame-retardant cover further includes a heat insulation sheet coupled to the support frame to cover the plurality of vent holes of the support frame.

[0011] In an exemplary embodiment, the heat insulation sheet is inserted between the support frame and the top pad.

[0012] In an exemplary embodiment, the top pad comprises silicone or polyurethane.

[0013] In an exemplary embodiment, each of the plurality of battery cells includes a cell housing, the cell housing including a body portion for receiving electrode assemblies and a sealing portion extending from the body portion, wherein the top pad contacts the sealing portion of the cell housing of each of the plurality of battery cells.

[0014] In an exemplary embodiment, the housing further includes a pair of inner walls spaced apart and the plurality of battery cells located between the pair of inner walls, wherein the flame-retardant cover is coupled to the pair of inner walls.

[0015] In an exemplary embodiment, the battery device further includes a side pad disposed between adjacent battery cells among the plurality of battery cells, wherein the top pad contacts the side pad.

[0016] In an exemplary embodiment, the plurality of battery cells are arranged along a first direction, wherein the contact between the upper surface of the side pad and the top pad is continuous in a second direction intersecting the first direction.

[0017] In an exemplary embodiment, the side pad includes: a lower pad disposed between adjacent battery cells among the plurality of battery cells; and an upper pad disposed on the lower pad and in contact with the top pad.

[0018] In an exemplary embodiment, the top pad includes a protrusion projecting toward the side pad, wherein the bottom surface of the protrusion of the top pad contacts the upper surface of the side pad.

[0019] In an exemplary embodiment, the top pad includes a groove into which the side pad is inserted.

[0020] In an exemplary embodiment, the material of the top pad and the material of the side pad are the same.

[0021] In an exemplary embodiment, the base frame includes cooling channels configured to allow the flow of cooling fluid.

[0022] In an exemplary embodiment, the plurality of battery cells are arranged along a first direction, wherein the housing further includes a pair of inner walls spaced apart and the plurality of battery cells are located between the pair of inner walls, wherein the flame-retardant cover includes: a support frame coupled to the pair of inner walls and including a plurality of vent holes; and a heat insulation sheet connected to the support frame to cover the plurality of vent holes in the frame, wherein the top pad is attached to the flame-retardant cover to cover the plurality of vent holes in the support frame.

[0023] Beneficial effects

[0024] According to an exemplary embodiment of this disclosure, the top pad contacts the cell housing of each of the plurality of battery cells, thereby blocking or inhibiting the lateral flow of high-temperature gases and / or flames generated by a burning battery cell through the space beneath the flame-retardant cover. Therefore, even when a burning battery cell is present within the housing, heat transfer to normal, unburned battery cells can be prevented or inhibited.

[0025] The effects obtainable from the exemplary embodiments of this disclosure are not limited to those described above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of this disclosure pertain. In other words, those skilled in the art can also derive unintended effects from practicing the exemplary embodiments of this disclosure. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view showing a battery device according to an exemplary embodiment of the present disclosure.

[0027] Figure 2 It is shown Figure 1 A cross-sectional view of a portion of the battery device.

[0028] Figure 3 This is a cross-sectional view showing the exhaust path within a battery device according to an exemplary embodiment of the present disclosure.

[0029] Figure 4 This is a cross-sectional view showing a portion of a battery device according to an exemplary embodiment of the present disclosure.

[0030] Figure 5 This is a cross-sectional view showing a portion of a battery device according to an exemplary embodiment of the present disclosure.

[0031] Figure 6 This is a cross-sectional view showing a portion of a battery device according to an exemplary embodiment of the present disclosure.

[0032] Figure 7This is a cross-sectional view showing a portion of a battery device according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0033] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that the terms and words used in this specification and claims should not be interpreted in their ordinary or dictionary meaning, but rather should be interpreted as conforming to the meaning and concept of the technical concept of the present disclosure, based on the principle that the inventors have appropriately defined the concepts of the terms for the best description of the disclosure.

[0034] Therefore, it should be understood that the embodiments described herein and the configurations shown in the accompanying drawings are merely the most preferred embodiments of this disclosure, and not an exhaustive list of the technical concepts of this disclosure, and various equivalents and modifications may exist that can replace them at the time of submission.

[0035] Furthermore, in describing this disclosure, specific descriptions of relevant known configurations or features in which such detailed description would obscure the nature of this disclosure have been omitted.

[0036] Because the embodiments of this disclosure are provided to explain the disclosure more fully to those skilled in the art, the shapes and dimensions of the components in the drawings may be exaggerated, omitted, or shown schematically for clarity. Therefore, the dimensions or proportions of each component do not necessarily indicate its actual size or proportion.

[0037] (First Implementation)

[0038] Figure 1 This is a cross-sectional view showing a battery device 500 according to an exemplary embodiment of the present disclosure. Figure 2 It is shown Figure 1 A cross-sectional view of a portion of the battery device 500.

[0039] Reference Figure 1 and Figure 2 The battery assembly 500 may include a housing 410, a plurality of cell assemblies 10, a flame-retardant cover 300, and a top pad 350. The battery assembly 500 may correspond to a battery pack or a battery module.

[0040] The housing 410 can provide internal space for accommodating multiple battery cell assemblies 10. The internal space of the housing 410 can accommodate multiple battery cell assemblies 10. The housing 410 may include a base frame 411, a side frame 413, and a top frame 415.

[0041] The base frame 411 can support multiple cell assemblies 10. The base frame 411 can have a plate-like shape extending in a first horizontal direction (e.g., the X direction) and a second horizontal direction (e.g., the Y direction).

[0042] The base frame 411 may include a cooling channel 4111 configured for the flow of cooling fluid. Cooling fluid supplied from the outside to the base frame 4111 may be supplied to the inlet of the cooling channel 4111, flow along the cooling channel 4111, and be discharged to the outside through the outlet of the cooling channel 4111. Cooling of the cell assembly 10 may occur as the cooling fluid flows through the cooling channel 4111. The cooling fluid may include a coolant and / or a refrigerant.

[0043] The side frame 413 can extend along the periphery of the base frame 411 and can surround the cell assembly 10.

[0044] The top frame 415 can be fastened to the top of the side frame 413 to cover multiple cell assemblies 10. The top frame 415 can have a plate-like shape extending in a first horizontal direction (e.g., the X direction) and a second horizontal direction (e.g., the Y direction).

[0045] The housing 410 may include a plurality of inner walls 420 disposed on the base frame 411. The plurality of inner walls 420 may divide the interior space of the housing 410 into a plurality of receiving spaces 433. One or more battery cell assemblies 10 may be disposed within each of the plurality of receiving spaces 433 defined by the plurality of inner walls 420 of the housing 410. In an exemplary embodiment, the plurality of inner walls 420 may be spaced apart from each other in a first horizontal direction (e.g., the X direction), and each individual inner wall 420 may extend in a second horizontal direction (e.g., the Y direction). A single battery cell assembly 10 may be disposed between a pair of inner walls 420.

[0046] Multiple cell assemblies 10 may be arranged on the base frame 411 in a first horizontal direction (e.g., the X direction) and / or a second horizontal direction (e.g., the Y direction). Each cell assembly 10 may include multiple battery cells 100 and at least one side pad 200.

[0047] Each battery cell 100 is a basic unit of a lithium-ion battery, i.e., a secondary battery. Each battery cell 100 may include an electrode assembly, an electrolyte, and a cell housing 110. The electrode assembly built into the cell housing 110 may include a positive electrode, a negative electrode, and a separator inserted between the positive and negative electrodes. Depending on the assembly configuration, the electrode assembly may be of the wound type or the stacked type. The wound type electrode assembly may include a wound structure of a positive electrode, a negative electrode, and a separator inserted between the positive and negative electrodes. The stacked type electrode assembly may include multiple positive electrodes, multiple negative electrodes, and multiple separators inserted between the multiple positive electrodes and the multiple negative electrodes in sequence. 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 a negative electrode active material.

[0048] The cell housing 110 can be made of a laminate. The laminate can have a multilayer structure including resin layers. In order to manufacture the cell housing 110 having a storage space for the storage electrode assembly 120, a laminate having a first portion including the storage space and a second portion connected to the first portion can be prepared, and the outer peripheral portions of the first portion and the second portion of the laminate can be heat-sealed.

[0049] The cell housing 110 may include a main body 111 and a sealing portion 113. The main body 111 has a storage space therein for storing the electrode assembly 120, and the sealing portion 113 extends outward from the main body 111. The sealing portion 113 may extend along the periphery of the main body 111. The sealing portion 113 may include a conjugate formed by heat-sealing the first and second portions of the aforementioned laminate.

[0050] The sealing portion 113 may include a folded portion formed by a folding process. The sealing portion 113 may include a first folded portion 1131 extending from the main body portion 111 and folded in a first rotational direction, and a second folded portion 1133 folded from the first folded portion 1131 in the first rotational direction, the first rotational direction being the folding direction of the first folded portion 1131. The first folded portion 1131 may extend between an edge of the main body portion 111 and the second folded portion 1133. The second folded portion 1133 may be fully attached to the first folded portion 1131. The second folded portion 1133 may face a surface of the main body portion 111, and the second folded portion 1133 may be located between a surface of the main body portion 111 and the first folded portion 1131. To form the sealing portion 113, a first portion and a second portion of the laminate are joined by thermal fusion to form a joint. Subsequently, a first folding process may be performed to fold a portion of the joint in the first rotational direction, and a second folding process may be performed to fold another portion of the joint in the first rotational direction. Through two folding processes, the sealing portion 113 is folded such that the second fold 1133 faces one surface of the main body portion 111, and a space is formed between one surface of the main body portion 111 and the second fold 1133. Because the sealing portion 113 has a folded structure, the sealing force of the cell housing 110 can be enhanced. The sealing portion 113 can be fixed to the main body portion 111 via a fixing member such as tape.

[0051] Each battery cell 100 can correspond to a pouch-type battery cell, a cylindrical battery cell, or a prismatic battery cell. The electrode assembly of a pouch-type battery cell is embedded within a pouch-shaped housing including an aluminum laminate. The electrode assembly of a cylindrical battery cell is embedded within a cylindrical metal can. The electrode assembly of a prismatic battery cell is embedded within a prismatic metal can.

[0052] Multiple battery cells 100 disposed in the cell assembly 10 can be connected in series and / or in parallel. For example, multiple battery cells 100 can be connected in series with each other. For example, multiple battery cells 100 can also be connected in parallel with each other. For example, when a group of two or more battery cells 100 connected in parallel is defined as a group, a group consisting of two or more battery cells 100 connected in parallel and another group consisting of two or more battery cells 100 connected in parallel can be connected in series.

[0053] In an exemplary embodiment, a plurality of battery cells 100 disposed in the battery cell assembly 10 may be arranged along a first horizontal direction (e.g., the X direction), and each battery cell 100 may extend along a second horizontal direction (e.g., the Y direction). Electrode leads may be disposed at the ends of each battery cell 100 along the second horizontal direction (e.g., the Y direction). The electrode leads of adjacent battery cells 100 among the plurality of battery cells 100 may be electrically and physically connected to each other.

[0054] Side pads 200 may be disposed between battery cells 100. Side pads 200 may have a plate-like shape extending substantially in a second horizontal direction (e.g., the Y direction) and a vertical direction (e.g., the Z direction). Each side of the side pad 200 may contact a battery cell 100. Side pads 200 may be attached to adjacent battery cells 100 by an adhesive member such as tape. Each cell assembly 10 may include a plurality of side pads 200. At least one battery cell 100 may be disposed between an adjacent pair of side pads 200. In an exemplary embodiment, a group of multiple battery cells 100 may be disposed between an adjacent pair of side pads 200.

[0055] The side pad 200 can be tightly adhered to the side of the battery cell 100 to support the battery cell 100. The side pad 200 can be configured to elastically deform under external force to support the corresponding battery cell 100. When an external force is applied to the side pad 200 in a first horizontal direction (e.g., the X direction), the thickness of the side pad 200 in the first horizontal direction (e.g., the X direction) can decrease from an initial thickness. Furthermore, when the external force is released from the side pad 200, the thickness of the side pad 200 in the first horizontal direction (e.g., the X direction) can return to its initial thickness. When the thickness of the battery cell 100 in the first horizontal direction (e.g., the X direction) increases due to the expansion of the battery cell 100, the side pad 200 elastically deforms, thereby absorbing or distributing the force applied by the expansion of the corresponding battery cell 100.

[0056] Furthermore, the side pad 200 may include a material with excellent heat resistance. The side pad 200 disposed between the two battery cells 100 can prevent or suppress heat transfer between the two battery cells 100.

[0057] In an exemplary embodiment, the side pad 200 may include polyurethane, silicone, or a combination of the above.

[0058] In an exemplary embodiment, a thermally conductive adhesive layer 440 may be interposed between each cell assembly 10 and the thermally conductive adhesive layer 440. Each cell assembly 10 may be thermally and physically bonded to the base frame 411 via the thermally conductive adhesive layer 440. The thermally conductive adhesive layer 440 may be attached to the bottom surface of the battery cell 100. The thermally conductive adhesive layer 440 may comprise a thermal interface material or a thermal resin.

[0059] A flame-retardant cover 300 may cover the cell assembly 10. The flame-retardant cover 300 may have a flat plate shape extending in a first horizontal direction (e.g., the X direction) and a second horizontal direction (e.g., the Y direction). The flame-retardant cover 300 may be coupled to a pair of inner walls 420 and may cover the cell assembly 10 disposed between the pair of inner walls 420. For example, the flame-retardant cover 300 may be fastened to the pair of inner walls 420 by fastening members such as bolts. The flame-retardant cover 300 may be spaced apart from a top frame 415, and an venting space 431 is provided between the flame-retardant cover 300 and the top frame 415. The venting space 431 may be part of the internal space of the housing 410. In cross-section, the venting space 431 may extend continuously over all the battery cells 100 of each individual cell assembly 10. The flame-retardant cover 300 covers the cell assembly 10 to prevent high-temperature gases and flames flowing along the venting space 431 from penetrating into the cell assembly 10.

[0060] The flame-retardant cover 300 may include a support frame 310 and a heat insulation sheet 320.

[0061] The support frame 310 can support the heat insulation sheet 320. The support frame 310 may include a plurality of vent holes 311. The plurality of vent holes 311 may penetrate the support frame 310 in a vertical direction (e.g., the Z direction). The plurality of vent holes 311 may each overlap with at least one battery cell 100 in a vertical direction (e.g., the Z direction). The support frame 310 may include a material with high strength, such as metal. In an exemplary embodiment, the elastic modulus of the support frame 310 may be greater than the elastic modulus of the side pad 200.

[0062] A heat shield 320 can be attached to a support frame 310. The heat shield 320 can be a single sheet or a single piece. The heat shield 320 can be attached to one surface of the support frame 310 to cover a plurality of vent holes 311 in the support frame 310. The heat shield 320 can close one side of each of the plurality of vent holes 311 in the support frame 310, thereby preventing communication between the space housing the battery cell 100 and the vent space 431. However, the heat shield 320 can be configured to rupture under pressure in the space housing the battery cell 100, thereby allowing gas to flow between the space housing the battery cell 100 and the vent space 431. Figure 1 In the diagram, the heat insulation sheet 320 is shown attached to the bottom surface of the support frame 310, but the heat insulation sheet 320 may also be attached to the upper surface of the support frame 310. The heat insulation sheet 320 covers a plurality of vent holes 311 in the support frame 310, thereby preventing high-temperature gases and flames flowing along the vent space 431 from penetrating into the cell assembly 10.

[0063] The heat insulation sheet 320 may include heat-resistant materials, fire-resistant materials, and / or thermally resistive materials. In an exemplary embodiment, the heat insulation sheet 320 may include at least one of high heat-resistant resin, glass fiber, fiber-reinforced plastic, compressed fiber, and fiber-reinforced fire-resistant insulator.

[0064] The heat insulation sheet 320 can be configured to rupture when the pressure in the containment space 433 below the flame-retardant cover 300 exceeds a certain level due to high-temperature gas generated from the battery cell 100. When the heat insulation sheet 320 ruptures, the gas from the containment space 433 can be discharged into the exhaust space 431 through the exhaust port 311 of the support frame 310, which overlaps with the ruptured portion of the heat insulation sheet 320.

[0065] A top pad 350 may be disposed between the flame-retardant cover 300 and the cell assembly 10, and may cover multiple battery cells 100. The top pad 350 may have a plate-like shape extending in a first horizontal direction (e.g., the X direction) and a second horizontal direction (e.g., the Y direction). The top pad 350 may be attached to the bottom surface of the flame-retardant cover 300 by an adhesive member such as double-sided tape. A support frame 310 may support the top pad 350 to prevent or inhibit deformation of the top pad 350 due to high temperature and high pressure. In an exemplary embodiment, a heat insulation sheet 320 may be inserted between the flame-retardant cover 300 and the top pad 350. In some exemplary embodiments, the heat insulation sheet 320 may be attached to the upper surface of the flame-retardant cover 300, and the support frame 310 may be inserted between the heat insulation sheet 320 and the top pad 350.

[0066] A top pad 350 may be attached to a flame-retardant cover 300 to cover a plurality of vent holes 311 in the support frame 310 of the flame-retardant cover 300. The top pad 350 may close one side of each of the plurality of vent holes 311 in the support frame 310, thereby preventing communication between the space housing the battery cell 100 and the vent space 431. However, the top pad 350 may be configured to rupture in response to pressure within the space housing the battery cell 100, thereby allowing gas to flow between the space housing the battery cell 100 and the vent space 431.

[0067] In an exemplary embodiment, the thickness of the top pad 350 can be between 0.1 mm and 5 mm, between 0.3 mm and 4 mm, between 0.5 mm and 3 mm, or between 0.7 mm and 2 mm. The thickness of the top pad 350 can be the same as or similar to the thickness of the insulation sheet 320.

[0068] In an exemplary embodiment, the top pad 350 may have a certain level of elasticity or higher elasticity. In an exemplary embodiment, the elastic modulus of the top pad 350 may be less than the elastic modulus of the support frame 310.

[0069] In an exemplary embodiment, the top pad 350 may comprise polyurethane, silicone, or a combination of the foregoing. In an exemplary embodiment, the material of the top pad 350 may be the same as the material of the side pad 200. In an exemplary embodiment, the material of the top pad 350 may be different from the material of the side pad 200.

[0070] The top pad 350 can contact the cell housing 110 of each of the plurality of battery cells 100. More specifically, the top pad 350 can contact the sealing portion 113 of the cell housing 110 of each of the plurality of battery cells 100. When the top pad 350 contacts the cell housing 110 of each of the plurality of battery cells 100, it can prevent the flow of high-temperature gases and / or flames in the space below the flame-retardant cover 300.

[0071] The top pad 350 and the heat insulation sheet 320 can be configured to rupture when the pressure in the receiving space 433 below the flame-retardant cover 300 exceeds a certain level due to high-temperature gases generated from the battery cell 100. Upon rupture of the top pad 350 and the heat insulation sheet 320, the high-temperature gases generated from the battery cell 100 can be discharged into the exhaust space 431 through the vent holes 311 of the support frame 310, which overlap with the ruptured portions of the top pad 350 and the heat insulation sheet 320.

[0072] Figure 3 This is a cross-sectional view showing the exhaust path within a battery device 500 according to an exemplary embodiment of the present disclosure. Figure 3 In the diagram, the movement path of the high-temperature gas and / or flame generated by the ignited battery cell 100P is indicated by a dashed line.

[0073] Reference Figure 3 When the pressure around the ignited battery cell 100P caused by the high-temperature gas and / or flame generated from the ignited battery cell 100P exceeds a certain level, the top pad 350 and heat insulation sheet 320 surrounding the ignited battery cell 100P may rupture. The high-temperature gas and / or flame ignited from the ignited battery cell 100P can flow through the ruptured portion 359 of the top pad 350, the ruptured portion 329 of the heat insulation sheet 320, and the vent 311 of the support frame 310 into the vent space 431 provided between the flame-retardant cover 300 and the top frame 415, and can flow laterally along the vent space 431 toward the side of the housing 410. The high-temperature gas and / or flame can be discharged to the outside of the housing 410 through the vent or venting device (e.g., a safety valve) provided on the side of the housing 410. The remaining portion of the top pad 350, excluding the broken portion 359, and the remaining portion of the heat insulation sheet 320, excluding the broken portion 329, cover the unignited normal battery cell 100, thereby preventing high-temperature gas and / or flame in the exhaust space 431 from flowing into the normal battery cell 100.

[0074] like Figure 3 As shown, the top pad 350 contacts the cell housing 110 of each of the plurality of battery cells 100, thereby blocking or suppressing the lateral flow of high-temperature gases and / or flames generated from an ignited battery cell 100P across the space below the flame-retardant cover 300. Therefore, even when an ignited battery cell 100P is present within the housing 410, heat transfer to the normal unignited battery cells 100 can be prevented or suppressed.

[0075] (Second Implementation)

[0076] Figure 4 This is a cross-sectional view showing a portion of a battery device according to an exemplary embodiment of the present disclosure. Hereinafter, it will be described... Figure 4 The battery device shown is concentrated in relation to the reference. Figure 1 and Figure 2 The differences described in the battery device 500.

[0077] Reference Figure 4 The top pad 350 may contact the side pad 200. The contact between the side pad 200 and the top pad 350 may be continuous in a second horizontal direction (e.g., the Y direction). The contact between the side pad 200 and the top pad 350 may be a surface contact. The upper surface of the side pad 200 may contact the top pad 350 such that no gap is formed between the side pad 200 and the top pad 350. By contacting the top pad 350, the side pad 200 may block or suppress the lateral flow of high-temperature gas and / or flame from the space below the top pad 350.

[0078] In an exemplary embodiment, the side pad 200 may be attached to the top pad 350. In an exemplary embodiment, the side pad 200 may be attached to the top pad 350 by means of an adhesive member (such as double-sided tape) inserted between the upper surface of the side pad 200 and the top pad 350.

[0079] In an exemplary embodiment, the side pad 200 and the top pad 350 may comprise materials with an elasticity exceeding a certain level. In this case, the contact between the side pad 200 and the top pad 350 can be stably maintained by the restoring force of the side pad 200 and the restoring force of the top pad 350.

[0080] (Third implementation method)

[0081] Figure 5 This is a cross-sectional view showing a portion of a battery device according to an exemplary embodiment of the present disclosure. Here, it will be described... Figure 5 The battery device shown is concentrated in relation to the reference. Figure 4 The differences in the described battery devices.

[0082] Reference Figure 5 The side pad 200A may include a lower pad 210 and an upper pad 220. The lower pad 210 may be disposed between battery cells 100. The lower pad 210 contacts the side of the battery cell 100 and can support the battery cell 100. The upper pad 220 may be disposed on top of the lower pad 210. The upper pad 220 may be disposed between the lower pad 210 and the top pad 350. The upper pad 220 may contact both the lower pad 210 and the top pad 350. The upper pad 220 may extend along the upper surface of the lower pad 210 in a second horizontal direction (e.g., the Y direction). The contact between the upper pad 220 and the lower pad 210 may be continuous in the second horizontal direction (e.g., the Y direction), and the contact between the upper pad 220 and the top pad 350 may be continuous in the second horizontal direction (e.g., the Y direction). The lower surface of the upper pad 220 may be in close contact with the upper surface of the lower pad 210, such that no gap is formed between the upper pad 220 and the lower pad 210. The upper surface of the upper pad 220 can be in close contact with the top pad 350, so that no gap is formed between the upper pad 220 and the top pad 350.

[0083] In an exemplary embodiment, the width of the upper pad 220 may differ from the width of the lower pad 210. Here, the width of the upper pad 220 and the width of the lower pad 210 may each refer to their length along a first horizontal direction (e.g., the X direction). In an exemplary embodiment, the width of the upper pad 220 may be greater than the width of the lower pad 210. When the width of the upper pad 220 is greater than the width of the lower pad 210, the contact area between the upper pad 220 and the top pad 350 can be increased, and the airtightness between the upper pad 220 and the top pad 350 can be improved.

[0084] In some exemplary embodiments, the upper pad 220 and the lower pad 210 may comprise the same material. In some exemplary embodiments, the upper pad 220 and the lower pad 210 may comprise different materials. In exemplary embodiments, the upper pad 220 and the lower pad 210 may each comprise polyurethane, silicone, or a combination of the foregoing.

[0085] In an exemplary embodiment, the upper pad 220 may be attached to the top pad 350. In an exemplary embodiment, the upper pad 220 may be attached to the top pad 350 via an adhesive member (such as double-sided tape) inserted between the upper surface of the upper pad 220 and the top pad 350. In an exemplary embodiment, the upper pad 220 may be attached to the lower pad 210. In an exemplary embodiment, the upper pad 220 may be attached to the lower pad 210 via an adhesive member (such as double-sided tape) inserted between the lower surface of the upper pad 220 and the upper surface of the lower pad 210.

[0086] In an exemplary embodiment, the upper pad 220 and the lower pad 210 each have a certain level of elasticity or higher elasticity, and the side pad 200A can be pressed against the top pad 350 by the restoring force of the upper pad 220 and the restoring force of the lower pad 210.

[0087] (Fourth Implementation)

[0088] Figure 6 This is a cross-sectional view showing a portion of a battery device according to an exemplary embodiment of the present disclosure. Here, it will be described... Figure 6 The battery device shown is concentrated in relation to the reference. Figure 1 and Figure 2 The difference described is in the battery device 500.

[0089] Reference Figure 6 The top pad 350A may include a protrusion 351 projecting toward the side pad 200. The protrusion 351 of the top pad 350A may extend in a second horizontal direction (e.g., the Y direction). The bottom surface of the protrusion 351 of the top pad 350A may contact the upper surface of the side pad 200. The contact between the protrusion 351 of the top pad 350A and the side pad 200 may be continuous in the second horizontal direction (e.g., the Y direction).

[0090] (Fifth implementation method)

[0091] Figure 7 This is a cross-sectional view showing a portion of a battery device according to an exemplary embodiment of the present disclosure. Hereinafter, it will be described... Figure 7 The battery device shown is concentrated in relation to the reference. Figure 6 The differences in the described battery devices.

[0092] Reference Figure 7The top pad 350B may include a groove 352 into which the side pad 200 is inserted. The upper part of the side pad 200 can be inserted into the groove 352 provided on the lower surface of the top pad 350B. When the side pad 200 is inserted into the groove 352 of the top pad 350B, the assembly and alignment between the side pad 200 and the top pad 350B become easier, and the structural security between the side pad 200 and the top pad 350B can be improved.

[0093] The present disclosure has been described in detail above with reference to the accompanying drawings and embodiments. However, the configurations described in the drawings or embodiments of this specification are merely one embodiment of the present disclosure and do not represent all the technical concepts of the present disclosure. Therefore, it should be understood that various equivalents and modifications can be made to the present disclosure when submitting this application.

Claims

1. A battery device, the battery device comprising: The housing includes a base frame and a top frame; Multiple battery cells are disposed on the base frame; A top pad that covers and contacts the plurality of battery cells; as well as A flame-retardant cover is attached to the top pad and spaced apart from the top frame, wherein there is an exhaust space between the flame-retardant cover and the top frame.

2. The battery device according to claim 1, wherein, The flame-retardant cover includes a support frame, and the support frame includes multiple vent holes, wherein... The top pad covers the plurality of vent holes of the support frame.

3. The battery device according to claim 2, wherein, The flame-retardant cover also includes a heat insulation sheet connected to the support frame to cover the plurality of vent holes of the support frame.

4. The battery device according to claim 3, wherein, The heat insulation sheet is inserted between the support frame and the top pad.

5. The battery device according to claim 1, wherein, The top pad comprises silicone or polyurethane.

6. The battery device according to claim 1, wherein, Each of the plurality of battery cells includes a cell housing, the cell housing including a main body portion for accommodating electrode assemblies and a sealing portion extending from the main body portion, wherein, The top pad contacts the sealing portion of the cell housing of each of the plurality of battery cells.

7. The battery device according to claim 1, wherein, The housing also includes a pair of inner walls spaced apart, and the plurality of battery cells are located between the pair of inner walls, wherein, The flame-retardant cap is attached to the pair of inner walls.

8. The battery device according to claim 1, wherein, The battery device further includes side pads disposed between adjacent battery cells among the plurality of battery cells, wherein, The top pad contacts the side pad.

9. The battery device according to claim 8, wherein, The plurality of battery cells are arranged along a first direction, wherein... The contact between the upper surface of the side pad and the top pad is continuous in a second direction intersecting the first direction.

10. The battery device according to claim 8, wherein, The side pad includes: Lower pads, the lower pads being disposed between adjacent battery cells among the plurality of battery cells; and An upper pad is disposed on the lower pad and in contact with the top pad.

11. The battery device according to claim 8, wherein, The top pad includes a protrusion projecting toward the side pad, wherein, The bottom surface of the protrusion of the top pad contacts the upper surface of the side pad.

12. The battery device according to claim 8, wherein, The top pad includes a groove into which the side pad is inserted.

13. The battery device according to claim 8, wherein, The material of the top pad is the same as the material of the side pad.

14. The battery device according to claim 1, wherein, The base frame includes cooling channels configured to allow the flow of cooling fluid.

15. The battery device according to claim 1, wherein, The plurality of battery cells are arranged along a first direction, wherein... The housing also includes a pair of inner walls spaced apart, and the plurality of battery cells are located between the pair of inner walls, wherein, The flame-retardant cover includes: A support frame, the support frame being connected to the pair of inner walls and including a plurality of vent holes; and A heat insulation sheet, the heat insulation sheet being connected to the support frame to cover the plurality of vent holes in the frame, wherein, The top pad is attached to the flame-retardant cap to cover the plurality of vent holes in the support frame.

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