Explosion-proof sheet applied heat diffusion prevention module

Abstract

A heat diffusion prevention module to which an explosion-proof sheet according to embodiments of the present invention is applied may include an outer portion having a plurality of cells arranged inside and one side formed open, a cover portion provided to cover the outer portion, and an explosion-proof portion disposed between the plurality of cells and the cover portion. By doing so, safety may be improved.

Description

Technology Field

[0001] The present invention relates to a heat diffusion prevention module to which an explosion-proof sheet is applied. Background Technology

[0002] Battery modules are generally composed of multiple battery cells, which are designed with various components and structures for protection and stability. In particular, explosion-proof sheets are placed within the battery module to prevent or minimize hazardous situations, such as explosions or fires, that may occur within the cells.

[0003] Referring to Korean Published Patent No. 10-2025-0131625 and others, explosion-proof sheets play a crucial role in mitigating physical impact between cells, suppressing heat diffusion, and blocking the propagation of energy generated inside the cells to the outside. This technology contributes to enhancing the safety of battery modules.

[0004] However, current technology has limitations in handling gases generated from battery cells. Various chemical reactions occur within battery cells during the charging and discharging processes, and gases can be generated during these events. In particular, the amount of gas generated can increase rapidly under abnormal conditions such as overcharging or internal short circuits. However, conventional explosion-proof sheets fail to adequately secure a path for gas leakage, which leads to the problem of gas accumulating inside the battery module.

[0005] If gas is not efficiently vented to the outside, the pressure inside the battery module increases, which can degrade the module's structural stability. Furthermore, accumulated gas has the potential to form explosive mixtures, posing a risk of serious accidents such as fires or explosions. Therefore, current technology faces the challenge of effectively managing gases generated from battery cells, which acts as a major factor undermining the safety and reliability of battery modules. The problem to be solved

[0006] Embodiments of the present invention provide a heat diffusion prevention module with an explosion-proof sheet applied thereto that can minimize the occurrence of fire through an explosion-proof section.

[0007] In addition, embodiments of the present invention aim to provide a heat diffusion prevention module to which an explosion-proof sheet is applied, which can minimize the occurrence of fire through a cover portion.

[0008] In addition, embodiments of the present invention aim to provide a heat diffusion prevention module with an explosion-proof sheet applied thereto that allows the battery module to perform its functions smoothly and enhances safety.

[0009] In addition, embodiments of the present invention aim to provide a heat diffusion prevention module with an explosion-proof sheet that can respond according to the amount of gas generated in the cell.

[0010] In addition, embodiments of the present invention aim to provide a heat diffusion prevention module to which an explosion-proof sheet with improved structural safety is applied.

[0011] In addition, embodiments of the present invention aim to provide a heat diffusion prevention module with an explosion-proof sheet that can be modified in design according to battery capacity. means of solving the problem

[0012] According to embodiments of the present invention, a heat diffusion prevention module to which an explosion-proof sheet is applied stably discharges gas to the outside through a cover portion and an explosion-proof portion, and can minimize diffusion in the event of a fire.

[0013] Specifically, it may include an outer section having a plurality of cells arranged inside and one side formed open, a cover section provided to cover the outer section, and an explosion-proof section disposed between the plurality of cells and the cover section.

[0014] Additionally, the explosion-proof section may include an explosion-proof main body section formed to cover a plurality of cells and an explosion-proof cutting section formed by cutting and spaced apart from the explosion-proof main body section to allow gas generated from the cells to pass through, and the cover section may include a cover main body section formed to cover the explosion-proof main body section and a cover venting section formed through a position corresponding to the explosion-proof cutting section of the cover main body section.

[0015] Additionally, the explosion-proof section may further include an explosion-proof opening section disposed in the explosion-proof cutting section that opens the explosion-proof cutting section when the gas pressure exceeds a predetermined pressure. The explosion-proof opening section may include an opening main body section disposed in the explosion-proof cutting section, an opening rotation section configured to connect the opening main body section and the explosion-proof main body section and to be rotatable, a plurality of opening penetration sections formed through the opening main body section, an opening closing section disposed in the opening penetration section to close the opening penetration sections, an opening passage section formed by cutting into the opening closing section to allow gas to pass through, and an opening bending section disposed in the explosion-proof main body section and configured to be made of an elastic material and bends when the pressure exceeds a predetermined pressure.

[0016] Additionally, the cover portion may further include a cover placement portion provided in the cover main body portion, wherein the open banding portion is disposed therein. The cover placement portion may include a placement space portion formed by being indented in the cover placement portion, a placement magnetic portion disposed in the placement space portion and provided to have magnetism, and a placement elastic portion covering the placement magnetic portion and provided with an elastic material.

[0017] Additionally, the cover portion may further include a cover extinguishing portion disposed in the cover main body portion and discharging extinguishing liquid when the temperature exceeds a predetermined temperature. The cover extinguishing portion may include a extinguishing main body portion disposed in the cover main body portion and storing extinguishing liquid inside, a extinguishing penetration portion formed through the bottom of the extinguishing main body portion, a extinguishing discharge portion disposed in the extinguishing penetration portion and configured to be removed when the temperature exceeds a predetermined temperature, a extinguishing connection portion formed indented in the cover main body portion and configured to connect the extinguishing main body portion and the cover venting portion, and a extinguishing closing portion disposed at the end of the extinguishing connection portion and configured to be removed when the temperature exceeds a predetermined temperature.

[0018] Additionally, the explosion-proof section may further include an explosion-proof cutting section disposed in the explosion-proof cutting section and configured to cut the fire extinguishing finishing section when the pressure exceeds a first reference pressure. The explosion-proof cutting section may include a cutting body section disposed in the explosion-proof cutting section and made of an elastic material, which moves toward the fire extinguishing finishing section when the pressure exceeds the first reference pressure; a cutting execution section disposed in the cutting body section and configured to cut the fire extinguishing finishing section; and a cutting discontinuity section connecting the cutting body section and the cutting execution section and configured to break when a second reference pressure greater than the first reference pressure is applied.

[0019] Additionally, it may further include a coupling part provided to combine the explosion-proof part and the cover part. The coupling part may include a coupling protrusion formed protruding from the cover part, a coupling receiving part formed recessed in the explosion-proof part into which the coupling protrusion is inserted, a coupling insertion part disposed at both ends of the coupling protrusion and provided to be movable, a coupling indentation part formed indented on the inner surface of the coupling receiving part into which the coupling insertion part is disposed, a coupling compression part connected to the coupling insertion part and the coupling protrusion and provided to be compressible, a coupling magnetic part disposed at the end of the coupling insertion part and provided to have magnetism, a coupling elastic part covering the coupling magnetic part and provided with an elastic material, a coupling absorption part disposed inside the coupling receiving part and provided to absorb shock, and a coupling auxiliary part disposed in the coupling indentation part and provided to have magnetism.

[0020] Additionally, it may further include a cover finishing part provided to be detachably attached to the cover venting part. The cover finishing part may include a finishing main body part disposed in the cover venting part, a finishing friction part that surrounds the finishing main body part and has a friction coefficient greater than that of the finishing main body part, a finishing insertion part formed protruding from the upper side of the finishing main body part and inserted into the cover main body part, and a finishing gripping part disposed in the finishing main body part and provided to be gripped by a user.

[0021] Additionally, it may further include explosion-proof auxiliary members provided in multiple numbers with cells arranged between them to assist in explosion protection. The explosion-proof auxiliary members may include an auxiliary main body part that is positioned inside the outer body part and forms the outer body, an auxiliary performance part that is positioned inside the auxiliary main body part and prevents heat transfer, an auxiliary elastic part that surrounds the auxiliary performance part and is provided with an elastic material, an auxiliary outer part provided to fix the auxiliary elastic part to the auxiliary main body part, and an auxiliary fixing part that is positioned at the end of the auxiliary main body part and fixed to the inside of the outer body part.

[0022] Additionally, the auxiliary fixing part may include a fixed main body part protruding from the end of the auxiliary main body part, a fixed extension part extending outwardly from both ends of the fixed main body part, a fixed magnetic part disposed inside the fixed extension part and provided to have magnetism, and a fixed elastic part disposed at the end of the fixed extension part and provided with an elastic material. Effects of the invention

[0023] Embodiments of the present invention can provide a heat diffusion prevention module with an explosion-proof sheet applied thereto that can minimize the occurrence of fire through an explosion-proof section.

[0024] In addition, embodiments of the present invention can provide a heat diffusion prevention module with an explosion-proof sheet applied to minimize fire occurrence through a cover portion.

[0025] In addition, embodiments of the present invention can provide a heat diffusion prevention module with an explosion-proof sheet applied thereto that smoothly performs the function of the battery module and has improved safety.

[0026] In addition, embodiments of the present invention can provide a heat diffusion prevention module with an explosion-proof sheet that can respond according to the amount of gas generated in the cell.

[0027] In addition, embodiments of the present invention can provide a heat diffusion prevention module to which an explosion-proof sheet with improved structural safety is applied.

[0028] In addition, embodiments of the present invention may provide a heat diffusion prevention module with an explosion-proof sheet that can be modified in design according to battery capacity. Brief explanation of the drawing

[0029] FIG. 1 is a perspective view of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied. FIG. 2 is a drawing showing the explosion-proof part of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied. FIG. 3 is a drawing showing the cover placement section and the cover extinguishing section of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied. FIG. 4 is a drawing showing a joint of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied. FIG. 5 is a drawing showing the cover finish of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied. FIG. 6 is a drawing showing an explosion-proof auxiliary part of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied. Specific details for implementing the invention

[0030] Below, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention.

[0031] However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the invention in the drawings, parts unrelated to the description have been omitted, and similar parts throughout the specification have been given similar reference numerals.

[0032] In this specification, redundant descriptions of identical components are omitted.

[0033] Furthermore, when a component is described in this specification as being 'connected' or 'connected' to another component, it should be understood that it may be directly connected to or connected to the other component, or that there may be other components in between. On the other hand, when a component is described in this specification as being 'directly connected' or 'directly connected' to another component, it should be understood that there are no other components in between.

[0034] Furthermore, the terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention.

[0035] Additionally, in this specification, singular expressions may include plural expressions unless the context clearly indicates otherwise.

[0036] Furthermore, in this specification, terms such as 'comprising' or 'having' are intended merely to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0037] Additionally, in this specification, the term "and / or" includes a combination of the plurality of described items or any of the plurality of described items. In this specification, "A or B" may include "A," "B," or "both A and B."

[0038] FIG. 1 is a perspective view of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied.

[0039] Referring to FIG. 1, a heat diffusion prevention module (S) with an explosion-proof sheet applied may include an outer part (1), a cover part (2), and an explosion-proof part (3). The heat diffusion prevention module (S) with an explosion-proof sheet applied can smoothly discharge gas to the outside when gas is generated in a plurality of cells placed inside.

[0040] The outer part (1) may provide a space in which a plurality of cells are arranged inside. The outer part (1) may be formed in a shape with one side open. Cells and explosion-proof parts (3) may be housed inside through the open side of the outer part (1). The outer part (1) may perform the role of protecting internal components from external impact. For example, the material of the outer part (1) may be metal, plastic, composite material, ceramic, high-strength alloy, carbon fiber reinforced polymer (CFRP), or glass fiber reinforced plastic (GFRP). However, the present invention is not limited thereto.

[0041] The cover portion (2) may be provided to cover one open side of the exterior portion (1). That is, the cover portion (2) closes the exterior portion (1) and effectively protects a plurality of cells (C) stored inside, thereby preventing fire from occurring as much as possible.

[0042] The explosion-proof section (3) can be placed between a plurality of cells (C) and the cover section (2). The explosion-proof section (3) can relieve explosion pressure that may occur in the cells. The explosion-proof section (3) can perform the role of preventing heat diffusion by blocking the propagation of flames and high-temperature gases.

[0043] FIG. 2 is a drawing showing the explosion-proof part of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied.

[0044] Referring to FIG. 2, the explosion-proof section (3) may include an explosion-proof main body section (31), an explosion-proof cutting section (32), and an explosion-proof opening section (33). The explosion-proof section (3) may be positioned between a plurality of cells and a cover section (2). The explosion-proof section (3) may perform the function of mitigating explosion pressure that may occur in the cells and preventing the spread of heat.

[0045] The explosion-proof main body (31) can form the overall exterior of the explosion-proof part (3). The explosion-proof main body (31) may be provided to cover a plurality of cells. The explosion-proof main body (31) may be formed of a material having insulating and flame-retardant properties to prevent electrical short circuits in the cells and suppress the propagation of flames. For example, the explosion-proof main body (31) may be mica, aramid, ceramic fiber, glass fiber, engineering plastic, silicone, or epoxy resin. However, the present invention is not limited thereto.

[0046] Explosion-proof cutting sections (32) may be spaced apart from each other in the explosion-proof main body (31). The explosion-proof cutting sections (32) are formed by cutting to provide a path for gas generated in the cell to pass through. The explosion-proof cutting sections (32) can normally remain closed to block the inflow of external foreign matter. The explosion-proof cutting sections (32) can open to relieve pressure when the pressure inside the cell increases above a certain level.

[0047] In one embodiment of the present invention, the cover portion (2) may include a cover body portion (21) and a cover venting portion (22). The cover body portion (21) may be provided to cover the explosion-proof body portion (31). The cover venting portion (22) may be formed through the cover body portion (21) at a position corresponding to the explosion-proof cutting portion (32). Through this arrangement, gas can be smoothly discharged to the outside when the explosion-proof cutting portion (32) is opened. The alignment of the explosion-proof cutting portion (32) and the cover venting portion (22) can increase the efficiency of the gas discharge path. In addition, the impact of the discharged gas on other parts within the module can be minimized.

[0048] In one embodiment of the present invention, the shape and size of the explosion-proof cutting portion (32) may be varied. For example, the explosion-proof cutting portion (32) may be formed in a circular, square, or slit shape. Additionally, the explosion-proof cutting portion (32) may be formed in the shape of a cut line on the explosion-proof main body (31) so as to be easily broken under a specific pressure.

[0049] The explosion-proof opening section (33) may be placed in the explosion-proof cutting section (32). The explosion-proof opening section (33) may perform the function of opening the explosion-proof cutting section (32) when the pressure of the gas generated in the cell exceeds a predetermined pressure. The explosion-proof opening section (33) may include an opening main body section (331), an opening rotation section (332), an opening penetration section (333), an opening closure section (334), an opening passage section (335), and an opening bending section (336).

[0050] The open body part (331) is positioned in the explosion-proof cutting part (32) and can serve to physically block the gas discharge path. The open body part (331) is provided in a plate shape so that it can directly receive pressure from the gas. The open body part (331) can move by the gas pressure to open the explosion-proof cutting part (32).

[0051] The open pivot part (332) can connect the open main body part (331) and the explosion-proof main body part (31). The open pivot part (332) is provided to be rotatable so as to support the open main body part (331) so that it can rotate by gas pressure. The open pivot part (332) may have a hinge structure or a connecting part structure formed of a flexible material.

[0052] The open penetration portion (333) may be formed as multiple penetrations in the open main body portion (331). The open penetration portion (333) may provide an additional path through which gas can pass. Normally, the open penetration portion (333) may remain closed by the open closing portion (334).

[0053] The open-closed portion (334) is positioned in the open-penetration portion (333) to close the open-penetration portion (333). The open-closed portion (334) is provided in the form of a thin film and can rupture even at relatively low pressure. The open-closed portion (334) can perform a primary sealing function to prevent gas leakage.

[0054] The open passage section (335) may be formed by cutting into the open / closed section (334). The open passage section (335) is provided to allow gas to pass through, thereby inducing the open / closed section (334) to open easily when pressure rises. The open passage section (335) may be formed as a cross-shaped or straight-shaped cut line.

[0055] The open bending section (336) may be placed in the explosion-proof main body (31). The open bending section (336) is provided with an elastic material and may bend when a pressure greater than a predetermined pressure is applied. The elastic deformation of the open bending section (336) may provide a mechanical mechanism that further opens the explosion-proof cutting section (32) when the amount of gas increases. The elastic force of the open bending section (336) may act as a factor in determining the pressure threshold at which the explosion-proof cutting section (32) opens.

[0056] FIG. 3 is a drawing showing a cover placement section and a cover extinguishing section of a heat diffusion prevention module to which an explosion-proof sheet according to an embodiment of the present invention is applied. Specifically, FIG. 3(a) shows a cover placement section, and FIG. 3(b) shows a cover extinguishing section.

[0057] Referring to FIGS. 2 and 3, the cover portion (2) may further include a cover placement portion (23) provided on the cover body portion (21) to which an open bending portion (336) is placed. The cover placement portion (23) may perform the role of supporting the open bending portion (336) so that it can operate stably and be fixed. The cover placement portion (23) may maintain structural stability even during repetitive bending operations of the open bending portion (336). The cover placement portion (23) may include a placement space portion (231), a placement magnetic portion (232), and a placement elastic portion (233).

[0058] The placement space (231) is formed as an indentation in the cover placement section (23) to provide a space where the open banding section (336) can be seated. The placement magnetic section (232) can be placed inside the placement space (231). The placement magnetic section (232) is provided to have magnetism so that it can fix the open banding section (336), which is made of metal material, by magnetic force. The placement elastic section (233) can be provided to cover the placement magnetic section (232). The placement elastic section (233) is provided with an elastic material so that it can absorb and mitigate the shock caused by the movement of the open banding section (336).

[0059] In one embodiment of the present invention, the placement magnetic part (232) may be implemented as a permanent magnet or an electromagnet. If implemented as an electromagnet, the magnetic force can be controlled as needed in conjunction with a sensor that detects the state of the battery module. For example, the placement elastic part (233) may be rubber, silicone, urethane, elastomer, sponge, gel, or a spring. However, the present invention is not limited thereto.

[0060] The cover portion (2) is positioned on the cover body portion (21) and may further include a cover fire extinguishing portion (24) that discharges fire extinguishing liquid when the temperature exceeds a predetermined level. The cover fire extinguishing portion (24) can perform the function of suppressing fires occurring in abnormal situations, such as thermal runaway of a battery cell, at an early stage. The cover fire extinguishing portion (24) can contribute to improving the safety of the module. The cover fire extinguishing portion (24) may include a fire extinguishing body portion (241), a fire extinguishing penetration portion (242), a fire extinguishing discharge portion (243), a fire extinguishing connection portion (244), and a fire extinguishing finishing portion (245).

[0061] The fire extinguishing main body (241) may be placed in the cover main body (21). The fire extinguishing main body (241) may have a space for storing fire extinguishing liquid inside. The fire extinguishing penetration part (242) may be formed through the bottom of the fire extinguishing main body (241) to provide a passage for discharging fire extinguishing liquid. The fire extinguishing discharge part (243) may be placed in the fire extinguishing penetration part (242). The fire extinguishing discharge part (243) may be removed when the temperature exceeds a predetermined temperature to open the fire extinguishing penetration part (242). That is, the fire extinguishing discharge part (243) may melt and be removed when the temperature exceeds a predetermined temperature.

[0062] The fire extinguishing connection part (244) may be formed by being recessed into the cover body part (21). The fire extinguishing connection part (244) may be provided to connect the fire extinguishing body part (241) and the cover venting part (22). The fire extinguishing sealing part (245) may be placed at the end of the fire extinguishing connection part (244). The fire extinguishing sealing part (245) may be provided to be removed when the temperature exceeds a predetermined temperature.

[0063] In one embodiment of the present invention, the extinguishing discharge portion (243) and the extinguishing finishing portion (245) may be made of a fusible alloy that melts at a specific temperature or a thermoplastic resin that decomposes by heat. The extinguishing liquid may include various types of extinguishing substances, such as powder extinguishing agents, halogenated extinguishing agents, inert gas extinguishing agents, or water-based cooling extinguishing agents. This configuration may provide optimal extinguishing performance depending on the type of fire and the characteristics of the battery cell.

[0064] The explosion-proof section (3) may further include an explosion-proof cutting section (34) positioned in the explosion-proof cutting section (32) and configured to cut the fire extinguishing finishing section (245) when the first reference pressure is exceeded. The explosion-proof cutting section (34) may serve to forcibly activate the fire extinguishing system when the pressure inside the cell rises rapidly before the temperature rises. The explosion-proof cutting section (34) may enable pressure-based preemptive safety measures. The explosion-proof cutting section (34) may include a cutting main body section (341), a cutting execution section (342), and a cutting severing section (343).

[0065] The cutting body (341) may be placed in the explosion-proof cutting section (32). The cutting body (341) is provided with an elastic material and can be moved toward the fire extinguishing finishing section (245) when the first reference pressure is greater than or equal to. The cutting execution section (342) may be placed in the cutting body (341). The cutting execution section (342) may be provided to be able to cut the fire extinguishing finishing section (245). The cutting severing section (343) may connect the cutting body (341) and the cutting execution section (342). The cutting severing section (343) may be provided to be damaged when a second reference pressure greater than the first reference pressure is applied. Accordingly, when the cutting section (342) removes the fire extinguishing section (245) and the pressure exceeds the second reference pressure, the cutting section (342) can be removed from the fire extinguishing section (245) to allow the fire extinguishing liquid to flow more smoothly.

[0066] In one embodiment of the present invention, the cutting portion (342) may be implemented in the form of a pointed needle, blade, or awl. The cutting portion (343) may include a thin connecting portion designed to have a specific cross-sectional area or a notch structure that induces stress concentration. Such a structure responds stepwise according to the magnitude of the pressure, thereby ensuring the safety of the heat diffusion prevention module (S) to which the explosion-proof sheet is applied in various ways.

[0067] FIG. 4 is a drawing showing a joint of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied.

[0068] Referring to FIG. 4, a heat diffusion prevention module (S) with an explosion-proof sheet applied may include a coupling part (4). The coupling part (4) may be provided to connect the explosion-proof part (3) and the cover part (2). The coupling part (4) may be responsible for the physical connection between the explosion-proof part (3) and the cover part (2). The coupling part (4) may ensure the overall structural stability of the module. The coupling part (4) may perform the role of firmly fixing the explosion-proof part (3) and the cover part (2) so that they do not separate even under external vibration or shock.

[0069] The coupling portion (4) may include a coupling protrusion (41), a coupling receiving portion (42), a coupling insertion portion (43), a coupling indentation portion (44), a coupling compression portion (45), a coupling magnetic portion (46), a coupling elastic portion (47), a coupling absorption portion (48), and a coupling auxiliary portion (49).

[0070] The coupling protrusion (41) may be formed protruding from the cover portion (2). The coupling protrusion (41) may provide a structural base that is inserted into the coupling receiving portion (42). The coupling protrusion (41) may extend in the direction of the explosion-proof main body portion (31) to determine the depth of the coupling.

[0071] The coupling receiving portion (42) may be formed by being recessed into the explosion-proof portion (3). The coupling receiving portion (42) may be provided so that the coupling protrusion (41) is inserted. The coupling receiving portion (42) may have an internal space corresponding to the shape of the coupling protrusion (41) to induce a stable coupling.

[0072] In one embodiment of the present invention, the coupling protrusion (41) may be formed protruding from the explosion-proof portion (3). Correspondingly, the coupling receiving portion (42) may be formed recessed in the cover portion (2). The coupling receiving portion (42) may be provided so that the coupling protrusion (41) is inserted therein.

[0073] The coupling insertion part (43) may be positioned at both ends of the coupling protrusion (41). The coupling insertion part (43) may be provided to be movable. The coupling insertion part (43) may facilitate the coupling and separation process. The coupling insertion part (43) may move inward by the elastic force of the coupling compression part (45). The coupling protrusion (41) may be inserted into the coupling receiving part (42) as the coupling insertion part (43) moves.

[0074] The coupling indentation (44) can be formed as an indentation on the inner side of the coupling receiving portion (42). The coupling indentation (44) can provide a space in which the coupling insertion portion (43) is placed. When the coupling insertion portion (43) is placed in the coupling indentation (44), the coupling protrusion (41) can be prevented from detaching from the coupling receiving portion (42).

[0075] The coupling compression part (45) can connect the coupling insert part (43) and the coupling protrusion part (41). The coupling compression part (45) can be provided to be compressible. The coupling compression part (45) can support the movement of the coupling insert part (43). For example, the coupling compression part (45) may be a spring, rubber, elastomer, polyurethane foam, silicone gel, metal foam, or coil spring. However, the present invention is not limited thereto.

[0076] The coupling magnetic part (46) may be placed at the end of the coupling insert part (43). The coupling magnetic part (46) may be provided to have magnetism. The coupling magnetic part (46) may strengthen the coupling force. The coupling magnetic part (46) may magnetically interact with the coupling auxiliary part (49). Through interaction, the coupling magnetic part (46) may stably fix the coupling insert part (43) to the coupling indentation part (44).

[0077] The bonding elastic part (47) may be provided to cover the bonding magnetic part (46). The bonding elastic part (47) may be provided with an elastic material. The bonding elastic part (47) can protect the bonding magnetic part (46) from external impact. The bonding elastic part (47) can increase bonding stability by absorbing minute vibrations that occur during bonding.

[0078] The coupling absorbing portion (48) may be placed inside the coupling receiving portion (42). The coupling absorbing portion (48) may be provided to absorb shock. The coupling absorbing portion (48) can prevent direct collision between the coupling protrusion (41) and the coupling receiving portion (42). The coupling absorbing portion (48) can reduce noise generated during the coupling process. The coupling absorbing portion (48) can contribute to maintaining the durability of the coupling portion (4) even with long-term use.

[0079] The coupling aid (49) may be placed in the coupling indentation (44). The coupling aid (49) may be provided to have magnetism. The coupling aid (49) may generate an attractive force with the coupling magnetic part (46). The magnetic coupling between the coupling aid (49) and the coupling magnetic part (46) may assist in mechanical coupling. The magnetic coupling between the coupling aid (49) and the coupling magnetic part (46) may form a more robust and reliable fastening structure.

[0080] FIG. 5 is a drawing showing the cover finish of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied.

[0081] Referring to FIG. 5, the heat diffusion prevention module (S) with the explosion-proof sheet applied may further include a cover finishing portion (5). The cover finishing portion (5) may be provided so as to be detachably attached to the cover venting portion (22). The cover finishing portion (5) may normally close the cover venting portion (22) to prevent external foreign matter or moisture from entering the module. Additionally, the cover finishing portion (5) may have a structure that allows it to be easily separated by a user when maintenance or internal inspection of the module is required.

[0082] The cover finishing part (5) may include a finishing main body part (51), a finishing friction part (52), a finishing insertion part (53), and a finishing gripping part (54). These components can be organically combined to simultaneously provide a stable sealing function and an easy attachment / detachment function for the cover venting part (22). Each component of the cover finishing part (5) is designed to perform a specific function, thereby improving the reliability of the overall structure and ease of use.

[0083] Regarding the cover body part (21), details that overlap with those described in FIG. 1 are omitted. The cover body part (21) forms the exterior of the cover part (2), and a cover venting part (22) for gas discharge may be formed inside. As shown in FIG. 5, the cover body part (21) can provide a structural base on which the cover finishing part (5) can be stably mounted.

[0084] The finishing body part (51) may be a body part forming the basic shape of the cover finishing part (5). The finishing body part (51) may be manufactured in a cylindrical or polygonal column shape so that it can be inserted to fit the inner diameter of the cover venting part (22). The finishing body part (51) may be composed of a material that is durable against chemical environments and temperature changes inside the battery module. For example, the finishing body part (51) may be polypropylene, polycarbonate, acrylonitrile butadiene styrene (ABS), engineering plastic, aluminum, stainless steel, or ceramic composite material. However, the present invention is not limited thereto.

[0085] The finishing friction part (52) can be arranged to wrap around the outer surface of the finishing main body part (51). The finishing friction part (52) can be provided to have a friction coefficient higher than that of the material of the finishing main body part (51). Through this, when the cover finishing part (5) is coupled to the cover venting part (22), a solid fixing force can be secured by the frictional force between the finishing friction part (52) and the inner surface of the cover venting part (22). This frictional coupling can prevent the cover finishing part (5) from detaching even from external vibrations or weak impacts. For example, the finishing friction part (52) may be natural rubber, silicone rubber, nitrile butadiene rubber (NBR), ethylene propylene diene monomer (EPDM), thermoplastic elastomer (TPE), fluororubber (FKM), or polyurethane. However, the present invention is not limited thereto.

[0086] The end insertion part (53) may be formed protruding from the upper side of the end main body part (51) and provided to be inserted into the cover main body part (21).

[0087] The end gripper (54) may be positioned at the upper center of the end body (51) so that the user can easily grasp it with their hand. The end gripper (54) may be ergonomically designed so that the user can separate the cover end part (5) from the cover venting part (22) with minimal force. The surface of the end gripper (54) may have irregularities or patterns formed to prevent slipping. For example, the end gripper (54) may be in the form of a ring, a T-shaped handle, a sphere, a tab, a loop, a foldable handle, or a protruding lip. However, the present invention is not limited thereto.

[0088] FIG. 6 is a drawing showing an explosion-proof auxiliary part of a heat diffusion prevention module to which an explosion-proof sheet according to one embodiment of the present invention is applied.

[0089] Referring to FIG. 6, the heat diffusion prevention module (S) with the explosion-proof sheet applied may further include an explosion-proof auxiliary part (6). Regarding the exterior part (1), details that overlap with those described in FIG. 1 may be omitted. The exterior part (1) can form the overall shape of the heat diffusion prevention module (S) with the explosion-proof sheet applied. The exterior part (1) can perform the function of protecting internal components from the external environment.

[0090] The explosion-proof auxiliary member (6) may be provided in multiple units. The explosion-proof auxiliary member (6) may be placed between cells (C). The explosion-proof auxiliary member (6) may assist in explosion-proof functions. The explosion-proof auxiliary member (6) may block heat generated in a specific cell (C) from propagating to an adjacent cell (C). The explosion-proof auxiliary member (6) may perform the role of preventing the spread of thermal runaway phenomena. The explosion-proof auxiliary member (6) may include an auxiliary main body part (61), an auxiliary performance part (62), an auxiliary elastic part (63), an auxiliary outer part (64), and an auxiliary fixing part (65).

[0091] The auxiliary main body (61) may be placed inside the outer body (1). The auxiliary main body (61) may form the overall exterior and structural rigidity of the explosion-proof auxiliary part (6). The auxiliary main body (61) may provide a space to accommodate and protect the internal auxiliary performance part (62) and auxiliary elastic part (63). For example, the auxiliary main body (61) may be metal, plastic, ceramic, composite material, polymer compound, glass-fiber reinforced plastic, or carbon-fiber reinforced plastic. However, the present invention is not limited thereto.

[0092] The auxiliary performing unit (62) may be placed inside the auxiliary main body (61). The auxiliary performing unit (62) may perform the function of preventing heat transfer between cells (C). The auxiliary performing unit (62) may be composed of an insulating material having low thermal conductivity. The auxiliary performing unit (62) may minimize the transfer of high temperature generated in one cell (C) to an adjacent cell (C). For example, the auxiliary performing unit (62) may be aerogel, mica, ceramic fiber, glass wool, silica, vacuum insulation panel, or polyurethane foam. However, the present invention is not limited thereto.

[0093] The auxiliary elastic member (63) may be provided to surround the auxiliary performance member (62). The auxiliary elastic member (63) may be provided with an elastic material. The auxiliary elastic member (63) may serve to absorb external shocks or vibrations. The auxiliary elastic member (63) may accommodate minute volume changes (swelling) that occur during the charging and discharging process of the battery cell (C). The auxiliary elastic member (63) may maintain structural stability. The auxiliary elastic member (63) may prevent the auxiliary performance member (62) from being damaged by external pressure.

[0094] The auxiliary outer section (64) may be provided to fix the auxiliary elastic section (63) to the auxiliary main body section (61). The auxiliary outer section (64) may be part of the auxiliary main body section (61). The auxiliary outer section (64) may be formed in a shape that surrounds the outer edge of the auxiliary elastic section (63). The auxiliary outer section (64) may perform the function of fixing the auxiliary elastic section (63) and the auxiliary performing section (62) so that they do not move within the auxiliary main body section (61).

[0095] The auxiliary fixing part (65) may be positioned at the end of the auxiliary main body part (61). The auxiliary fixing part (65) may perform the function of fixing the explosion-proof auxiliary part (6) to the inside of the outer part (1). The auxiliary fixing part (65) may allow the explosion-proof auxiliary part (6) to be positioned at an accurate location between the cells (C). The auxiliary fixing part (65) may maximize the heat diffusion prevention performance. The auxiliary fixing part (65) may include a fixed main body part (651), a fixed extension part (652), a fixed magnetic part (653), and a fixed elastic part (654).

[0096] The fixed main body part (651) may be formed protruding from the end of the auxiliary main body part (61). The fixed main body part (651) may form the basic structure of the auxiliary fixed part (65). The fixed main body part (651) may provide a base for connection with the outer part (1). The fixed main body part (651) may be formed integrally with the auxiliary main body part (61). The fixed main body part (651) may secure structural strength.

[0097] The fixed extension part (652) can be extended outward from both ends of the fixed main body part (651). The fixed extension part (652) can increase the contact area with the inner surface of the outer part (1). The fixed extension part (652) can improve fixing stability. The fixed extension part (652) may have a structure that engages with a groove or protrusion formed on the inner surface of the outer part (1).

[0098] The fixed magnetic part (653) may be positioned on the inner side of the fixed extension part (652). The fixed magnetic part (653) may be provided to have magnetism. The fixed magnetic part (653) may be magnetically attached to the outer part (1). The fixed magnetic part (653) may allow the explosion-proof auxiliary part (6) to be easily attached to and detached from the outer part (1) without a separate fastening member. The fixed magnetic part (653) may improve ease of assembly and maintenance.

[0099] The fixed elastic part (654) may be placed at the end of the fixed extension part (652). The fixed elastic part (654) may be made of an elastic material. The fixed elastic part (654) may fill the small gap between the outer part (1) and the auxiliary fixed part (65). The fixed elastic part (654) may perform the role of absorbing vibrations. The fixed elastic part (654) may assist the explosion-proof auxiliary part (6) to adhere closely to the outer part (1) together with the magnetic force of the fixed magnetic part (653).

[0100] In one embodiment of the present invention, the auxiliary performing unit (62) may have a multilayer structure in which a plurality of materials are stacked rather than a single material. For example, the auxiliary performing unit (62) may include an insulating layer that blocks heat transfer and a phase change material (PCM) layer that absorbs heat above a specific temperature.

[0101] The auxiliary performance unit (62) can further improve heat diffusion prevention performance through a multi-layer structure. The multi-layer structure of the auxiliary performance unit (62) can provide thermal insulation performance during normal operation. The multi-layer structure of the auxiliary performance unit (62) can control the temperature through an endothermic reaction in the event of abnormal heat generation.

[0102] In one embodiment of the present invention, the auxiliary fixing part (65) may use a mechanical fixing method in addition to a magnetic fixing method. For example, the auxiliary fixing part (65) may be fixed to the outer part (1) through a snap-fit ​​structure, a fastening structure using a bolt and nut, or an adhesive structure using an adhesive. The fixing method of the auxiliary fixing part (65) may be selectively applied depending on the design requirements and operating environment of the battery module.

[0103] Although representative embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof. Explanation of the symbols

[0104] S: Heat diffusion prevention module 1: Exterior part 2: Cover section 3: Explosion-proof section 4: Joint part 5: Cover finishing part 6: Explosion-proof auxiliary part

Claims

Claim 1 The device comprises: an exterior portion having a plurality of cells arranged inside and one side formed open; a cover portion provided to cover the exterior portion; and an explosion-proof portion arranged between the plurality of cells and the cover portion; wherein the explosion-proof portion comprises: an explosion-proof main body portion formed to cover the exterior and the plurality of cells; and explosion-proof cutting portions spaced apart from the explosion-proof main body portion and formed by cutting to allow gas generated from the cells to pass through; wherein the explosion-proof portion further comprises an explosion-proof opening portion arranged in the explosion-proof cutting portion to open the explosion-proof cutting portion when the gas exceeds a predetermined pressure; wherein the explosion-proof opening portion comprises: an opening main body portion arranged in the explosion-proof cutting portion; an opening rotation portion connected to the opening main body portion and the explosion-proof main body portion and provided to be rotatable; an opening penetration portion formed by penetrating the opening main body portion in multiple places; an opening closing portion arranged in the opening penetration portion to close the opening penetration portion; and an opening passage portion formed by cutting in the opening closing portion to allow gas to pass through. A heat diffusion prevention module with an explosion-proof sheet applied, characterized by including: an open bending part disposed in the explosion-proof main body and provided with an elastic material that bends when a predetermined pressure or higher is applied. Claim 2 A heat diffusion prevention module with an explosion-proof sheet applied, characterized in that, in claim 1, the cover portion comprises: a cover body portion provided to cover the explosion-proof main body portion; and a cover venting portion formed through a position corresponding to the explosion-proof cutting portion of the cover body portion. Claim 3 delete Claim 4 A heat diffusion prevention module with an explosion-proof sheet applied according to claim 2, wherein the cover portion further comprises a cover placement portion provided in the cover main body portion and wherein the open banding portion is disposed therein; and wherein the cover placement portion comprises a placement space portion formed by being indented in the cover placement portion; a placement magnetic portion disposed in the placement space portion and provided to have magnetism; and a placement elastic portion covering the placement magnetic portion and provided with an elastic material. Claim 5 In claim 4, the cover portion further comprises a cover fire extinguishing portion disposed in the cover main body portion and discharging a fire extinguishing liquid when the temperature exceeds a predetermined temperature; wherein the cover fire extinguishing portion comprises: a fire extinguishing main body portion disposed in the cover main body portion and having a fire extinguishing liquid stored therein; a fire extinguishing penetration portion formed through the lower end of the fire extinguishing main body portion; a fire extinguishing discharge portion disposed in the fire extinguishing penetration portion and configured to be removed when the temperature exceeds a predetermined temperature; a fire extinguishing connection portion formed indented in the cover main body portion and configured to connect the fire extinguishing main body portion and the cover venting portion; and a fire extinguishing finishing portion disposed at the end of the fire extinguishing connection portion and configured to be removed when the temperature exceeds a predetermined temperature; characterized in that the heat diffusion prevention module with an explosion-proof sheet applied thereto. Claim 6 In claim 5, the explosion-proof section further comprises an explosion-proof cutting section disposed in the explosion-proof cutting section and configured to cut the fire extinguishing finishing section when the first reference pressure is greater than or equal to; wherein the explosion-proof cutting section comprises: a cutting body section disposed in the explosion-proof cutting section and configured to be made of an elastic material and move toward the fire extinguishing finishing section when the first reference pressure is greater than or equal to; a cutting execution section disposed in the cutting body section and configured to be capable of cutting the fire extinguishing finishing section; and a cutting discontinuity section connecting the cutting body section and the cutting execution section and configured to be damaged when a second reference pressure greater than the first reference pressure is applied; characterized in that it comprises a heat diffusion prevention module with an explosion-proof sheet applied thereto. Claim 7 A heat diffusion prevention module with an explosion-proof sheet applied according to claim 6, further comprising: a coupling part provided to combine the explosion-proof part and the cover part; wherein the coupling part comprises: a coupling protrusion formed protruding from the cover part; a coupling receiving part formed recessed in the explosion-proof part into which the coupling protrusion is inserted; a coupling insertion part disposed at both ends of the coupling protrusion and provided to be movable; a coupling indentation part formed indented on the inner surface of the coupling receiving part and into which the coupling insertion part is disposed; a coupling compression part provided to connect the coupling insertion part and the coupling protrusion and to be compressible; a coupling magnetic part disposed at the end of the coupling insertion part and provided to have magnetism; a coupling elastic part covering the coupling magnetic part and provided to be made of an elastic material; a coupling absorption part disposed inside the coupling receiving part and provided to absorb shock; and a coupling auxiliary part disposed in the coupling indentation part and provided to have magnetism. Claim 8 A heat diffusion prevention module with an explosion-proof sheet applied according to claim 7, further comprising: a cover finishing portion provided to be detachably attached to the cover venting portion; wherein the cover finishing portion comprises: a finishing main body portion disposed on the cover venting portion; a finishing friction portion that surrounds the finishing main body portion and is provided with a friction coefficient greater than that of the finishing main body portion; a finishing insertion portion formed protruding from the upper side of the finishing main body portion and inserted into the cover main body portion; and a finishing gripping portion disposed on the finishing main body portion and provided to be gripped by a user.

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