Battery module comprising restraint member and battery pack comprising restraint member

Abstract

A battery module of the present disclosure may comprise: multiple battery cells; and a thermal propagation blocking assembly positioned between at least some of the multiple battery cells. The heat propagation blocking assembly may comprise: a thermal insulation layer containing silica aerogel; a fireproof member comprising a first fireproof sheet, positioned on a first surface of the thermal insulation layer, and a second fireproof sheet, positioned on a second surface of the thermal insulation layer opposite to the first surface; and a buffer member comprising a first buffer pad positioned on the first fireproof sheet, and a second buffer pad positioned on the second fireproof sheet.

Description

Battery module including a low-voltage member and battery pack including a low-voltage member

[0001] The present disclosure relates to a battery module including a barrier member and a battery module including the barrier member.

[0002] Unlike primary batteries, secondary batteries can be recharged and discharged, making them suitable for a wide range of applications, including digital cameras, mobile phones, laptops, hybrid and electric vehicles, and energy storage systems (ESS). Secondary batteries can be lithium-ion batteries, nickel-cadmium batteries, nickel-metal hydride batteries, or nickel-hydrogen batteries.

[0003] Secondary batteries are manufactured as flexible pouch-type battery cells or rigid square or cylindrical can-type battery cells. Multiple battery cells can be formed into a stacked cell assembly.

[0004] Cell assemblies may be arranged within a case to form a battery module, and multiple battery modules may be arranged within a pack frame to form a battery pack. The battery pack may be used in various structures, such as vehicles or energy storage systems.

[0005] A battery pack may include a plurality of battery modules and a pack cover covering the plurality of battery modules. When a thermal runaway occurs in the battery module, flames, gases, and / or conductive particles may be discharged from the battery module. The battery pack may include a flow space through which flames, gases, and / or conductive particles discharged from the battery module flow.

[0006] However, in the event of thermal runaway of the battery module, thermal deformation of the module housing may occur. For example, the battery module may expand, and the volume of the flow path space within the battery pack may decrease. If the volume of the flow path space decreases, flames, gases, and / or conductive particles within the battery module may not be discharged to the outside of the module, and the pressure and temperature within the battery module may increase beyond a specified amount. If the pressure and temperature within the battery module increase beyond a specified amount, heat may propagate between battery modules, and thermal runaway of adjacent battery modules may occur.

[0007] According to one aspect of the present disclosure, a battery pack can be provided that can secure a flow path space of the battery pack by reducing thermal deformation of a battery module.

[0008] According to one aspect of the present disclosure, a battery pack capable of improving assembly convenience can be provided.

[0009] According to one aspect of the present disclosure, a battery pack capable of reducing noise and vibration may be provided.

[0010] The battery module and battery pack of the present disclosure can be widely applied in green technology fields such as electric vehicles, battery charging stations, and other battery-powered solar and wind power generation. Furthermore, the battery module and battery pack of the present disclosure can be used in eco-friendly electric vehicles and hybrid vehicles, which aim to prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0011] A battery pack of the present disclosure may include a plurality of battery modules, each including a plurality of battery cells and a module housing accommodating the plurality of battery cells, a pack cover covering the plurality of battery modules, a pack frame accommodating the plurality of battery modules, and a blocking member positioned between the plurality of battery modules and the pack cover. The blocking member may include a rigid member connected to the plurality of battery modules and a buffer member connected to the rigid member and facing the pack cover.

[0012] According to one embodiment, the module housing may include a module cover covering the plurality of battery cells and including a plurality of venting holes. The battery pack may further include a flow passage space positioned between the module cover and the pack cover, the flow passage space configured to allow gas generated from the plurality of battery cells to flow. The blocking member may be positioned within the flow passage space.

[0013] In one embodiment, the barrier member may be positioned so as not to overlap the plurality of venting holes.

[0014] In one embodiment, the cross-sectional area of ​​the barrier member may be less than the sum of the cross-sectional areas of the plurality of venting holes.

[0015] In one embodiment, the barrier member may include an adhesive layer positioned between the rigid member and the buffer member.

[0016] In one embodiment, each of the plurality of battery modules may include a mica sheet surrounding at least a portion of the module housing.

[0017] In one embodiment, the rigid member may include a first surface facing the buffer portion, a second surface opposite the first surface and facing the module housing, and a third surface surrounding at least a portion of the first surface and the second surface. The buffer portion may include a fourth surface facing the battery pack, a fifth surface opposite the fourth surface and having a receiving groove formed therein for receiving the rigid member, and a sixth surface surrounding at least a portion between the fourth surface and the fifth surface. The buffer portion may cover the first surface and the third surface of the rigid member.

[0018] In one embodiment, the mica sheet may include a coupling hole for receiving the blocking member. The blocking member may be force-fitted into the coupling hole, and the sixth surface of the buffer portion may contact an inner surface of the mica sheet defining the coupling hole.

[0019] In one embodiment, the restraining member may include a fastening member inserted into the rigid portion. The restraining member may be coupled to the module housing using the fastening member.

[0020] According to one embodiment, the module housing may include a module cover having a fastening hole formed therein for accommodating at least a portion of the fastening member. The second surface of the rigid portion and the fifth surface of the buffer portion may be disposed on the module cover.

[0021] In one embodiment, the buffer may include at least one of silicone, polyurethane, and aerogel.

[0022] In one embodiment, the rigid body may comprise mica.

[0023] According to one embodiment, the barrier member may be formed in a cylindrical shape.

[0024] In one embodiment, the elastic modulus of the rigid portion may be higher than the elastic modulus of the buffer portion. When the module housing expands, the rate of change in the first thickness of the rigid portion may be less than the rate of change in the second thickness of the buffer portion.

[0025] A battery module of the present disclosure may include a cell assembly including a plurality of battery cells, a module housing including a receiving portion for receiving the cell assembly and a module cover for covering the cell assembly, and a blocking member connected to the module housing. The blocking member may include a rigid portion connected to the module cover and a buffer portion connected to the rigid portion.

[0026] In one embodiment, the rigid member may include a first surface facing the buffer member, a second surface opposite the first surface and facing the module housing, and a third surface surrounding at least a portion of the first surface and the second surface. The buffer member may include a fourth surface facing the exterior of the battery module, a fifth surface opposite the fourth surface and having a receiving groove formed therein for receiving the rigid member, and a sixth surface surrounding at least a portion between the fourth surface and the fifth surface.

[0027] In one embodiment, the battery module may further include a mica sheet surrounding at least a portion of the module housing and including a coupling hole for receiving the blocking member. The blocking member is force-fitted into the coupling hole, and a sixth surface of the buffer portion may contact an inner surface of the mica sheet defining the coupling hole.

[0028] In one embodiment, the restraining member may include a fastening member inserted into the rigid portion. The restraining member may be coupled to the module housing using the fastening member.

[0029] A battery pack of the present disclosure may include a plurality of battery modules, each including a plurality of battery cells and a module housing accommodating the plurality of battery cells, a pack cover covering the plurality of battery modules, a pack frame accommodating the plurality of battery modules, and a blocking member positioned between the plurality of battery modules and the pack cover. The blocking member may include a rigid member connected to the pack cover and a buffer member connected to the rigid member and facing the module housing.

[0030] In one embodiment, the pack cover may include an outer surface facing the exterior of the battery pack and an inner surface facing the battery module. The blocking member may include a first fastening member coupled to the rigid body and penetrating the pack cover. The battery pack may include a second fastening member secured to the outer surface of the pack cover and coupled with the first fastening member.

[0031] According to one embodiment of the present disclosure, thermal deformation of a battery module in a thermal runaway state can be reduced.

[0032] According to one embodiment of the present disclosure, a flow path space between a battery pack and a battery module through which gases, flames, and / or conductive particles can flow can be maintained, and smooth exhaust can be induced.

[0033] According to one embodiment of the present disclosure, thermal runaway and heat propagation between battery modules can be delayed.

[0034] According to one embodiment of the present disclosure, the stress applied to the battery module can be reduced and the tolerance of the battery pack can be absorbed, thereby improving the assemblability.

[0035] According to one embodiment of the present disclosure, noise and vibration due to interference between a low-voltage member and a battery pack can be reduced.

[0036] FIG. 1 is a perspective view of a battery cell according to one embodiment.

[0037] FIG. 2 is a perspective view of a battery module according to one embodiment.

[0038] FIG. 3 is an exploded perspective view of a battery module according to one embodiment.

[0039] FIG. 4 is an exploded perspective view of a battery pack according to one embodiment.

[0040] FIG. 5 is a side schematic diagram of a battery pack according to one embodiment.

[0041] FIG. 6 is a perspective view of a member according to one embodiment.

[0042] FIG. 7 is an exploded perspective view of a barrier member including an adhesive layer, according to one embodiment.

[0043] FIG. 8 is a perspective view of a battery module including a mica sheet according to one embodiment.

[0044] FIG. 9 is a cross-sectional view taken along line Ⅰ-Ⅰ' of FIG. 8 according to one embodiment.

[0045] FIG. 10 is an exploded perspective view of the retaining member of FIG. 9, according to one embodiment.

[0046] FIG. 11 is a cross-sectional view taken along line Ⅰ-Ⅰ' of FIG. 8 according to one embodiment.

[0047] FIG. 12 is an exploded perspective view of the member of FIG. 11, according to one embodiment.

[0048] FIG. 13 is a perspective view of a battery module including a flame propagation prevention sheet according to another embodiment.

[0049] FIG. 14 is a side schematic diagram of a battery pack according to another embodiment.

[0050] Figure 15 is a schematic diagram of a low-pressure member coupled to the pack cover of Figure 14.

[0051] Figure 16 is a schematic diagram of a vehicle according to one embodiment.

[0052] Hereinafter, the present disclosure will be described in detail with reference to the attached drawings. However, these are merely exemplary and the present disclosure is not limited to the specific embodiments described as examples.

[0053] The terms and words used in this specification and claims described below are not to be construed as limited to their conventional or dictionary meanings. The inventor will interpret these terms and concepts in a way that is consistent with the technical spirit of the present disclosure, based on the principle that the inventor can appropriately define the concepts of the terms to best explain his or her invention.

[0054] Accordingly, it will be understood that the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present disclosure and do not represent all of the technical ideas of the present disclosure, and that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0055] Detailed descriptions of known functions and configurations that may obscure the gist of the present disclosure are omitted. In the attached drawings, some components are exaggerated, omitted, or schematically depicted, and the sizes of each component do not fully reflect the actual size.

[0056]

[0057] FIG. 1 is a perspective view of a battery cell according to one embodiment.

[0058] Referring to FIG. 1, a battery cell (100) may include a pouch (110), an electrode assembly (120), and an electrode tab (130). The battery cell (100) may be a secondary battery. For example, the battery cell (100) may be a lithium ion battery, but is not limited thereto. For example, the battery cell (100) may be a nickel-cadmium battery, a nickel-metal hydride battery, or a nickel-hydrogen battery capable of being charged and discharged.

[0059] The pouch (110) may form at least a portion of the exterior of the battery cell (100). The pouch (110) may include an electrode receiving portion (111) for receiving an electrode assembly (120) and a sealing portion (115) for sealing at least a portion of the periphery of the electrode receiving portion (111). The electrode receiving portion (111) may provide a space for receiving the electrode assembly (120) and an electrolyte.

[0060] The sealing portion (115) may be formed by joining at least a portion of the periphery of the pouch (110). The sealing portion (115) is formed in a flange shape that extends outward from the electrode receiving portion (111) formed in the shape of a container, and may be arranged along at least a portion of the outer surface of the electrode receiving portion (111). In one embodiment, the sealing portion (115) may include a first sealing portion (115a) where the electrode tab (130) is positioned and a second sealing portion (115b) where the electrode tab (130) is not positioned. A portion of the electrode tab (130) may be pulled out or exposed to the outside of the pouch (110). In order to increase the sealing degree of the first sealing portion (115a) and simultaneously secure an electrical insulation state at the position where the electrode tab (130) is pulled out, the electrode tab (130) may be covered by an insulating film (140). The insulating film (140) is made of a film material thinner than the electrode tab (130) and can be attached to both sides of the electrode tab (130).

[0061] In one embodiment, the electrode tabs (130) may be arranged on opposite sides of the lengthwise direction of the battery cell (100). For example, the electrode tabs (130) may include a positive electrode tab (130a) having a first polarity (e.g., positive electrode) facing one side of the lengthwise direction of the battery cell (100) and a negative electrode tab (130b) having a second polarity (e.g., negative electrode) facing the other side of the lengthwise direction. In the embodiment illustrated in FIG. 1, the sealing portion (115) may include two first sealing portions (115a) on which the electrode tabs (130) are arranged and one second sealing portion (115b) on which the electrode tabs (130) are not arranged. The electrode tabs (130) may be referred to as electrode leads.

[0062] The direction in which the electrode tabs (130) are positioned can be selectively designed. In one embodiment (e.g., FIG. 1), the electrode tabs (130) may include a positive electrode tab (130a) and a negative electrode tab (130b) positioned in an opposite direction to the positive electrode tab (130a) with respect to the electrode assembly (120). In FIG. 1, the electrode tabs (130) are shown positioned on opposite sides of the length direction of the battery cell (100) to face each other, but the structure of the electrode tabs (130) is not limited thereto. For example, two electrode tabs (130) may be arranged substantially parallel along the length direction of the battery cell (100).

[0063] Meanwhile, the pouch (110) is not limited to a structure in which a single sheet of outer material is folded to form a sealing portion (115) on three sides as shown in FIG. 1.

[0064] In one embodiment of the present disclosure, at least a portion of the sealing portion (115) may be formed in a form that is folded at least once. By folding at least a portion of the sealing portion (115), the bonding reliability of the sealing portion (115) may be improved, and the area of ​​the sealing portion (115) may be minimized. In one embodiment, among the sealing portions (115), a second sealing portion (115b) on which the electrode tab (130) is not arranged may be fixed by an adhesive member (not shown) after being folded twice. The angle at which the second sealing portion (115b) is bent or the number of times it is bent may be changed. For example, in one embodiment (not shown), the second sealing portion (115b) may be folded at an angle of 90° with respect to the first sealing portion (115a).

[0065] The electrode assembly (120) may include a cathode plate, an anode plate, and a separator. The separator may prevent contact between the cathode plate and the anode plate. Those skilled in the art will appreciate that the electrode assembly (120) may be manufactured using various methods. According to exemplary embodiments, the electrode assembly may be formed by repeatedly arranging the anode, cathode, and separator. In some embodiments, the electrode assembly may be a winding type, a stacking type, a z-folding type, or a stack-folding type.

[0066] The structure of the battery cell (100) illustrated in FIG. 1 is exemplary. For example, in FIG. 1, the battery cell (100) is described as a pouch-type battery cell, but the structure of the battery cell (100) is not limited thereto. For example, the battery cell (100) may be a cylindrical battery cell or a square battery cell.

[0067]

[0068] Figure 2 is a perspective view of a battery module according to one embodiment. Figure 3 is an exploded perspective view of a battery module according to one embodiment.

[0069] Referring to FIGS. 2 and 3, a battery module (200) may include a cell assembly (101) including a plurality of battery cells (100), a module housing (210), and a busbar assembly (220).

[0070] The module housing (210) forms at least a portion of the exterior of the battery module (200) and may form an interior space that accommodates components of the battery module (200), such as a cell assembly (101) and / or a busbar assembly (220).

[0071] The module housing (210) may include a receiving portion (212) that surrounds the lower surface and side surfaces of the cell assembly (101). The receiving portion (212) may include a main plate (213) that covers the lower surface of the cell assembly and a plurality of side wall members (214) that cover at least a portion of the side surfaces of the cell assembly (101). In one embodiment, the main plate (213) and the side wall members (214) may be formed integrally.

[0072] The module housing (210) may include an end plate (215) that covers a portion of a side surface of the cell assembly. In one embodiment, the end plate (215) may be connected to a longitudinal (e.g., Y-axis) end surface of the receiving portion (212). The end plate (215) may cover a portion of a side surface of the cell assembly (101) and at least a portion of the busbar assembly (220). The end plate (215) may include a hole (215a) for accommodating a terminal busbar (223) of the busbar assembly (2200).

[0073] In one embodiment, the module housing (210) may be formed of a material with high thermal conductivity, such as metal. For example, the module housing (210) may be formed of aluminum and / or stainless steel. However, the material of the module housing (210) is not limited thereto. In another embodiment, the module housing (210) may be formed of a polymer. In one embodiment, the module housing (210) may be referred to as a module case.

[0074] The busbar assembly (220) may include an electrically conductive busbar (221) electrically connected to an electrode tab (e.g., an electrode tab (130) of FIG. 1) of a battery cell (100) and a busbar frame (222) supporting the busbar. The busbar assembly (220) may include at least one connection terminal for electrical connection to the outside. The electrode tab (130) of the battery cell (100) may be electrically connected to the outside of the battery module (200) through the busbar (221) and the connection terminal.

[0075] The module cover (211) may form at least a portion of the exterior of the battery module (200) together with the module housing (210). For example, the module cover (211) may be connected to the module housing (210) and surround at least a portion of the cell assembly. The module cover (211) may be positioned on one side of the cell assembly and may cover the cell assembly. The specific structure of the module cover (211) is further described below.

[0076] The busbar assembly (220) may include an electrically conductive internal busbar (221) electrically connected to the electrode tabs (130) of the battery cells (100) and a busbar frame (222) supporting the internal busbar (221). The busbar frame (222) may be referred to as a support plate or frame. The busbar frame (222) may be formed of an electrically insulating material (e.g., a polymer). At least a portion of the busbar frame (222) may be disposed between the cell assembly (101) and the internal busbar (221) to support the internal busbar (221). In one embodiment, the internal busbar (221) may be referred to as a busbar.

[0077] The busbar assembly (220) may include at least one terminal busbar (223) for electrical connection to the exterior of the battery module (200). The electrode tab (130) of the battery cell (100) may be electrically connected to the exterior of the battery module (200) through the internal busbar (221) and the terminal busbar (223). For example, the terminal busbar (223) may be electrically connected to the internal busbar (221), and the current of the battery cell (100) may be transmitted to the exterior of the battery module (200) through the internal busbar (221) and the terminal busbar (223). The terminal busbar (223) may be exposed to the exterior of the module housing (210) through a hole (215a) of the end plate (215).

[0078] The battery module (200) may include a venting hole (230). The venting hole (230) may provide a path for flames, gases, and / or conductive particles generated in the battery cells (100) to be discharged to the outside of the battery module (200). As the flames, gases, and / or conductive particles are discharged to the outside of the battery module (200) through the venting hole (230), the pressure increase inside the battery module (200) may be reduced, and heat transfer between the battery cells (100) may be delayed. The venting hole (230) may be in communication with a receiving space (S) formed by the module housing (210). For example, the venting hole (230) may be a path for discharging gas inside the receiving space (S) to the outside of the module housing (210). The venting hole (230) may be a through hole formed in the module cover (211). A plurality of venting holes (230) may be provided. As another example, the venting hole (230) may be a notch formed in the module cover (211).

[0079] In one embodiment, the battery module (200) may include a restraint member (340). The restraint member (340) may be mounted to the module housing (210) (e.g., the module cover (211)). The restraint member (340) may be positioned to protrude from the outer surface of the module cover (211) toward the exterior of the battery module (200). In another embodiment, the restraint member (340) may be a component of a battery pack (e.g., the battery pack (300) of FIG. 4). For example, the restraint member (340) may be included in the battery pack (300). The restraint member (340) is further described below.

[0080] For convenience of explanation, some components are omitted or exaggerated in this document. For example, the number of battery cells (100), the shape of the busbar assembly (220), the number and shape of the venting holes (230), and / or the number of the blocking members (340) may be designed selectively. According to an embodiment not shown, the battery module (200) may include a conductive member (e.g., a long busbar) for adjusting the position of the connection terminal of the busbar assembly (220).

[0081]

[0082] Figure 4 is an exploded perspective view of a battery pack according to one embodiment. Figure 5 is a side schematic view of a battery pack according to one embodiment. Figure 6 is a perspective view of a retaining member according to one embodiment.

[0083] Referring to FIGS. 4, 5, and / or 6, a battery pack (300) may include a plurality of battery modules (200), a pack frame (310), and a retaining member (340). The description of the battery module (200) and the venting hole (230) of FIGS. 2 and / or 3 may be applied to the battery module (200) and the venting hole (230) of FIGS. 4 and 5.

[0084] A battery pack (300) may include a plurality of battery modules (200) and a pack frame (310) that accommodates the plurality of battery modules (200).

[0085] The pack frame (310) can accommodate components of the battery pack (300) (e.g., battery modules (200)). The pack frame (310) can include a bottom member (311) that supports the battery module (200), a pack cover (312) that covers the battery module (200), and a pack side wall (313) that surrounds at least a portion of the bottom member (311) and the pack cover (312). The bottom member (311) can support a receiving portion of the battery module (200) (e.g., a receiving portion (212) of FIG. 2).

[0086] The pack frame (310) may include a partition wall (320) that crosses at least some of the plurality of battery modules (200). For example, the receiving space of the pack frame (310) may be partitioned into a plurality of spaces by the partition wall (320). The partition wall (320) may be installed across the internal space of the battery pack (300) to reinforce the rigidity of the pack frame (310). In one embodiment, the partition wall (320) may include a first partition wall (320a) that crosses the plurality of battery cells (100) and a plurality of second partition walls (320b) that are substantially perpendicular to the first partition wall (320a).

[0087] In one embodiment, the battery pack (300) may include a duct member (330). The duct member (330) may include an exhaust space for providing a path for gases and / or flames discharged from the battery module (200). The duct member (330) may be disposed within the pack frame (310). The duct member (330) may surround at least a portion of the battery module (200). For example, gases and / or flames generated from battery cells of the battery module (200) (e.g., battery cells (100) of FIG. 1) may pass through the exhaust space of the duct member (330) to the exterior of the battery pack (300). In the present disclosure, the duct member (330) may be referred to as an exhaust duct or an exhaust member.

[0088] The retaining member (340) can maintain the position of the battery module (200) so as to be spaced apart from the module housing (e.g., module cover (211)) and the pack frame (310) (e.g., pack cover (312)). The retaining member (340) can restrain the position of the battery module (200) so that the battery module (200) is positioned within a designated position range. For example, the battery pack (300) can include a flow path (FPS) positioned between the battery module (200) and the pack cover (312). The flow path (FPS) can provide a path for gases, flames, and / or conductive particles discharged from the battery module (200) to flow. Gases, flames, and / or conductive particles generated inside the battery module (200) can flow past the venting hole (230) and the flow path (FPS).

[0089] The blocking member (340) may prevent or inhibit closure of the flow path space (FPS). The flow path space (FPS) may be an empty space located between the pack cover (312) and the module cover (211). In one embodiment, when expansion or swelling occurs in a cell assembly (e.g., cell assembly (101) of FIG. 3) located inside the battery module (200), the battery module (200) may be deformed (e.g., thermally deformed). For example, the outer surface of the module cover (211) of the battery module (200) may expand and come into contact with the inner surface of the pack cover (312). When the outer surface of the module cover (211) comes into contact with the inner surface of the pack cover (312), the flow path space (FPS) may be closed, causing the pressure and temperature inside the battery pack (300) to rise above a specified level. By preventing the closure of the flow path space (FPS) by the blocking member (340), the rate of increase in pressure and temperature inside the battery pack (300) can be reduced, and heat transfer between adjacent battery modules (200) can be delayed. The blocking member (340) can be located within the flow path space (FPS). For example, the blocking member (340) can be located between the pack cover (312) and the module cover (211).

[0090] The restraining member (340) may include a rigid member (341) connected to the battery module (200). For example, the rigid member (341) may be connected to the module cover (211). The rigid member (341) may reduce volume expansion due to thermal deformation of the battery module (200), thereby maintaining the flow path space (FPS) of the battery pack (300).

[0091] The rigid member (341) can be manufactured from a material having heat resistance, insulation, and a compressive strength greater than a specified size. For example, the rigid member (341) can include mica.

[0092] The blocking member (340) may include a buffer member (342) configured to reduce impact caused by contact between the battery pack (300) and the blocking member (340). The buffer member (342) may face the pack cover (312). For example, the buffer member (342) may be in contact with the pack cover (312). The buffer member (342) may be deformed based on the impact caused by contact with the pack cover (312). By deforming the buffer member (342), the buffer member (342) may reduce noise and / or vibration caused by contact between the blocking member (340) and the pack cover (312). By deforming the buffer member (342), the buffer member (342) may absorb dimensional deformation of the battery module (200) and tolerances of components. Due to the buffer portion (342), the manufacturing convenience of the battery module (200) and / or the battery pack (300) can be increased. The buffer portion (342) can be manufactured from an elastic material. For example, the buffer portion (342) can include at least one of silicone, polyurethane, and aerogel. The buffer portion (342) can be positioned closer to the pack cover (312) of the pack frame (310) of the battery pack (300) than to the rigid portion (341).

[0093] In one embodiment, the blocking member (340) may be formed in a cylindrical shape. For example, the blocking member (340) may have a circular cross-sectional area based on the direction in which the pack cover (312) extends (e.g., the X-axis direction). By forming the blocking member (340) in a cylindrical shape, resistance to gases, flames, and / or conductive particles discharged from the battery module (200) may be reduced, and the flowability of the venting gas may be improved. In another embodiment, the blocking member (340) may be formed in a columnar shape having an elliptical columnar shape or a polygonal cross-sectional area.

[0094] The rigid body (341) may be formed in a substantially cylindrical shape. For example, the rigid body (341) may include a first surface (341a) facing the buffer portion (342), a second surface (341b) opposite the first surface (341a) and facing the battery module (200), and a third surface (341c) surrounding at least a portion between the first surface (341a) and the second surface (341b). In one embodiment, the first surface (341a), the second surface (341b), and the third surface (341c) may be referred to as a first front surface, a first back surface, and a first side surface, respectively.

[0095] The buffer portion (342) may be formed in a substantially cylindrical shape. For example, the buffer portion (342) may include a fourth surface (342a) facing the pack cover (312), a fifth surface (342b) opposite the fourth surface (342a) and facing the rigid portion (341), and a sixth surface (342c) surrounding at least a portion between the fourth surface (342a) and the fifth surface (342b). In one embodiment, the fourth surface (342a), the fifth surface (342b), and the sixth surface (342c) may be referred to as a second front surface, a second back surface, and a second side surface, respectively.

[0096] The restraining member (340) can maintain the distance (D) between the battery module (200) and the pack cover (312) to a specified size or more. For example, when the restraining member (340) is in contact with the pack cover (312), the sum of the first thickness (T1) of the rigid member (341) and the second length (T3) of the buffer member (342) (e.g., the total thickness (T3) of the restraining member (340)) can be substantially equal to the distance (D) between the battery module (200) and the pack cover (312). In the present disclosure, the rigid member (341) means a material having an elastic modulus higher than the elastic modulus of a substantial rigid body or buffer member (342). For example, the elastic modulus of the buffer member (342) can be lower than the elastic modulus of the rigid member (341). As the module housing (210) of the battery module (200) expands, the ratio of the second thickness (T2) to the first thickness (T1) of the rigid portion (341) may increase. The length ratio of the rigid portion (341) and the buffer portion (342) may be selectively designed based on the distance (D) between the pack cover (312) and the battery module (200). For example, when the module housing (210) expands, the rate of change in the first thickness (T1) of the rigid portion (341) may be smaller than the rate of change in the second thickness (T2) of the buffer portion (342).

[0097] The battery pack (300) may include a battery control unit (390) for controlling the battery module (200). The battery control unit (390) may be positioned within the pack frame (310). The battery control unit (390) may include a battery management system (BMS). The configuration of the battery control unit (390) is known in various forms, and thus a detailed description thereof will be omitted. In one embodiment, the battery control unit (390) may be referred to as a processor.

[0098]

[0099] *The structure of the battery pack (300) of FIG. 83 is exemplary. For example, the number of battery modules (200) included in the battery pack (300), the number of venting holes (230), the number of retaining members (340), the shape of the pack frame (310), and / or the structure of the duct member (330) can be selectively designed.

[0100]

[0101] FIG. 7 is an exploded perspective view of a barrier member including an adhesive layer, according to one embodiment.

[0102] Referring to FIG. 7, the blocking member (340) may include a rigid member (341), a buffer member (342), and an adhesive layer (343). The description of the blocking member (340) of FIG. 4, FIG. 5, and / or FIG. 6 may be applied to the blocking member (340) of FIG. 7.

[0103] The adhesive layer (343) can connect the rigid part (341) and the buffer part (342). For example, the adhesive layer (343) can be positioned between the rigid part (341) and the buffer part (342). The adhesive layer (343) can combine the first surface (341a) of the rigid part (341) and the fifth surface (342b) of the buffer part (342).

[0104] The adhesive layer (343) may include an adhesive material. For example, the adhesive layer (343) may include a hot melt adhesive or a double-sided tape. The material of the adhesive layer (343) is exemplary. For example, the adhesive layer (343) may include an adhesive having a specified peel strength (e.g., 0.07 kgf / mm) or greater. In one embodiment, the adhesive layer (343) may be a hot melt adhesive having a peel strength of substantially 0.13 kgf / mm.

[0105]

[0106] FIG. 8 is a perspective view of a battery module including a mica sheet according to one embodiment.

[0107] Referring to FIG. 8, the battery module (200) may include a module housing (210) and a mica sheet (240) surrounding at least a portion of the module housing (210). The barrier member (340) may be mounted on the battery module (200). At least a portion of the description of the battery module (200), module housing (210), and barrier member (340) of FIG. 2 may be mounted on the battery module (200), module housing (210), and barrier member (340) of FIG. 8. For convenience of description, the busbar assembly (220) is shown excluded from FIG. 8.

[0108] The mica sheet (240) can surround at least a portion of the module housing (210). For example, the mica sheet (240) can cover at least a portion of the module cover (211) and at least a portion of the receiving portion (212) (e.g., a portion of the side wall member (214) of FIG. 3). The mica sheet (240) can be bonded to the module cover (211) using an adhesive or a bonding member.

[0109] The mica sheet (240) can prevent or delay the propagation of flames. For example, the mica sheet (240) can be made of mica having insulating and heat-resistant properties. The mica sheet (240) can prevent internal short circuits caused by contact between the module housing (210) and the pack frame (310). The mica sheet (240) can protect the module housing (210) and components inside the module housing (210) from flames, gases, and / or conductive particles transmitted from the outside of the battery module (200).

[0110] The mica sheet (240) may include an exhaust hole (241) corresponding to a venting hole (e.g., a venting hole (230) of FIG. 2) formed in the module cover (211). A plurality of exhaust holes (241) may be provided. The exhaust hole (241) may be a through hole formed in the mica sheet (240). Flames, gases, and / or conductive particles generated in a battery cell (e.g., a battery cell (100) of FIG. 3) may be discharged to the outside of the battery module (200) through the venting hole (230) and the exhaust hole (241).

[0111] The barrier member (340) may be coupled to the mica sheet (240) and / or the module housing (210). The structure in which the barrier member (340) is coupled to the mica sheet (240) and / or the module housing (210) (e.g., the module cover (211)) is further described below.

[0112]

[0113] Fig. 9 is a cross-sectional view taken along line Ⅰ-Ⅰ' of Fig. 8 according to one embodiment. Fig. 10 is a perspective view of the blocking member of Fig. 9 according to one embodiment.

[0114] Referring to FIGS. 9 and 10 , the battery module (200) may include a module cover (211), a mica sheet (240), and a restraining member (340) including a rigid member (341) and a buffer member (342). At least some of the descriptions of the battery module (200), the module cover (211), the mica sheet (240), and the restraining member (340) of FIGS. 6 and 8 may be applied to the battery module (200), the module cover (211), the mica sheet (240), and the restraining member (340) of FIGS. 9 and / or 10 .

[0115] The support member (340) may include a rigid member (341) and a buffer member (342).

[0116] In one embodiment, the rigid portion (341) may be formed smaller than the buffer portion (342). For example, the size of the rigid portion (341) (e.g., the diameter of the first surface (341a) or the second surface (341b)) may be smaller than the size of the buffer portion (342) (e.g., the diameter of the fourth surface (342a) or the fifth surface (342b))).

[0117] The buffer portion (342) may include a receiving groove (344) for receiving the rigid portion (341). The receiving groove (344) may be formed on the fifth surface (342b) of the buffer portion (342). The rigid portion (341) may be inserted (e.g., force-fitted) into the receiving groove (344) of the buffer portion (342) to be coupled with the buffer portion (342). In a state where the rigid portion (341) is inserted into the buffer portion (342), the buffer portion (342) may cover the first surface (341a) and the third surface (341c) of the rigid portion (341). The rigid portion (341) may be coupled with the buffer portion (342) using frictional force. In one embodiment, the retaining member (340) may include an adhesive (e.g., adhesive layer (343) of FIG. 7) positioned between the rigid member (341) and the buffer member (342) within the receiving groove (344).

[0118] The mica sheet (240) may include a front surface (240a) facing the outside of the battery module (200), a back surface (240b) opposite the front surface (240a) and facing the module cover (211), and an inner surface (240c) located between the front surface (240a) and the back surface (240b).

[0119] The mica sheet (240) may include a coupling hole (242) for accommodating at least a portion of the blocking member (340). The coupling hole (242) may be a through hole extending from the front surface (240a) to the back surface (240b) of the mica sheet (240). The coupling hole (242) may be surrounded by the inner surface (240c) of the mica sheet (240). A plurality of coupling holes (242) may be provided. For example, the number of coupling holes (242) may be the same as the number of blocking members (340).

[0120] The restraining member (340) can be coupled to a portion of the battery module (200) (e.g., a mica sheet (240)) using frictional force. For example, at least a portion of the buffer portion (342) of the restraining member (340) can be inserted into the coupling hole (242) of the mica sheet (240). For example, the second surface (341b) of the rigid portion (341) and the fifth surface (342b) of the buffer portion (342) can be in contact with the module cover (211), and the sixth surface (342c) of the buffer portion (342) can be in contact with the inner surface (240c) of the mica sheet (240). By interfering with the buffer portion (342) into the coupling hole (242), the restraining member (340) can be coupled to the mica sheet (240) and / or the module cover (211).

[0121]

[0122] Fig. 11 is a cross-sectional view taken along line Ⅰ-Ⅰ' of Fig. 8 according to one embodiment. Fig. 12 is a perspective view of the blocking member of Fig. 11 according to one embodiment.

[0123] Referring to FIGS. 11 and 12 , the battery module (200) may include a module cover (211), a mica sheet (240), and a blocking member (340) including a rigid member (341) and a buffer member (342). At least some of the descriptions of the battery module (200), the module cover (211), the mica sheet (240), the blocking member (340), the rigid member (341), and the buffer member (342) of FIGS. 6 , 8 , 9 , and / or 10 may be applied to the battery module (200), the module cover (211), the mica sheet (240), the blocking member (340), the rigid member (341), and the buffer member (342) of FIGS. 11 and / or 12 .

[0124] The battery module (200) may include a fastening member (345) for coupling the blocking member (340) to the module cover (211) and / or the mica sheet (240). In one embodiment, the fastening member (345) may be a bolt.

[0125] The fastening member (345) can be inserted into the rigid portion (341) of the blocking member (340). For example, the rigid portion (341) can include a hole for receiving the fastening member (345). One end of the fastening member (345) can be coupled to the rigid portion (341), and the other end can be coupled to the module cover (211). By the fastening member (345), the bonding force between the blocking member (340) and the module cover (211) can be increased.

[0126] The module cover (211) may include a fastening hole (217) for accommodating at least a portion of the fastening member (345). The fastening hole (217) may be a through hole extending from the front surface (211a) of the module cover (211) to the back surface (211b) of the module cover (211). The fastening hole (217) may be surrounded by the inner surface (211c) of the module cover (211). The front surface (211a) of the module cover (211) may face the back surface (240b) of the mica sheet (240).

[0127] The fastening hole (217) of the module cover (211) may face at least a portion of the joining hole (242) of the mica sheet (240). For example, the fastening hole (217) may overlap at least a portion of the joining hole (242). At least a portion of the fastening member (345) may pass through the joining hole (242) of the mica sheet (240) and be inserted into the fastening hole (217) of the module cover (211).

[0128] The retaining member (340) may be mounted on the module cover (211) and the mica sheet (240). For example, the second surface (341b) of the rigid member (341) may face the front surface (211a) of the module housing (e.g., the module cover (211)). The fifth surface (342b) of the buffer member (342) may face the front surface (211a) of the module cover (211), and the sixth surface (342c) of the buffer member (342) may face the inner surface (240c) of the mica sheet (240). At least a portion of the fastening member (345) may face the inner surface (211c) of the module cover (211).

[0129]

[0130] FIG. 13 is a perspective view of a battery module including a flame propagation prevention sheet according to another embodiment.

[0131]

[0132] *Referring to FIG. 13, the battery module (200) may include a module housing (210) and a mica sheet (240) surrounding at least a portion of the module housing (210). The barrier member (340) may be mounted on the module cover (211) of the battery module (200) and / or the mica sheet (240).

[0133] At least a portion of the description of the battery module (200), module housing (210), and restraint member (340) of FIGS. 2, 8, 9, 10, 11, and / or 12 can be mounted on the battery module (200), module housing (210), and restraint member (340) of FIG. 13. For convenience of description, the busbar assembly (220) is shown excluded from FIG. 13.

[0134] The blocking member (340) may be optionally arranged in the module housing (210). For example, the position and / or number of blocking members (340) installed in the module housing (210) may be optionally designed. For example, in one embodiment, the blocking member (340) may be provided as a plurality of blocking members (340). The plurality of blocking members (340) may include two blocking members (340) located in the front of the module housing (210), three blocking members (340) located in the center of the module housing (210), and two blocking members (340) located in the rear of the module housing (210).

[0135] The blocking member (340) may be positioned so as not to overlap with the venting hole (230) and the exhaust hole (241). For example, from the upper portion of the battery module (200), when looking at the battery module (200), the blocking member (340) may not overlap with the venting hole (230) and the exhaust hole (241). By not overlapping the venting hole (230) and the exhaust hole (241), interference of the blocking member (340) with gases, flames, and / or conductive particles discharged from the battery module (200) may be reduced.

[0136] The area of ​​the blocking member (340) may be designed based on the area of ​​the venting hole (230). For example, the sum of the cross-sectional areas of the blocking members (340) may be smaller than the sum of the cross-sectional areas of the venting holes (230). The cross-sectional area of ​​the blocking member (340) and the cross-sectional area of ​​the venting holes (230) may be cross-sectional areas on a plane (XY plane) along which the module cover (211) extends. In one embodiment, the sum of the cross-sectional areas of the plurality of blocking members (340) may be 10% or more of the sum of the cross-sectional areas of the plurality of venting holes (230). For example, the sum of the cross-sectional areas of the plurality of blocking members (340) may be about 13% of the sum of the cross-sectional areas of the plurality of venting holes (230).

[0137]

[0138] Fig. 14 is a side schematic diagram of a battery pack according to another embodiment. Fig. 15 is a schematic diagram of a retaining member coupled to the pack cover of Fig. 14.

[0139] Referring to FIGS. 14 and 15, the battery pack (300) may include a battery module (200), a pack cover (312), and a restraining member (350) including a rigid member (351) and a buffer member (352).

[0140] At least some of the descriptions of the battery module (200), the battery pack (300), the pack cover (312), the blocking member (340), the rigid member (341) and the buffer member (352) of FIGS. 2 to 12 may be applied to the battery module (200), the battery pack (300), the pack cover (312), the blocking member (350), the rigid member (351) and the buffer member (352) of FIGS. 14 and 15.

[0141] The blocking member (350) can separate the battery module (200) and the pack cover (312). For example, the blocking member (350) can prevent closure of the fuel passage space (FPS).

[0142] The blocking member (350) may be mounted to the pack cover (312). For example, the blocking member (350) may include a rigid portion (351) facing the pack cover (312) and a first fastening member (355) connected to the rigid portion (351). The first fastening member (355) may be coupled to the pack cover (312). In one embodiment, the battery pack (300) may include a second fastening member (356) to prevent the blocking member (350) from detaching from the pack cover (312). The second fastening member (356) may surround at least a portion of the first fastening member (355) and be coupled to the first fastening member (355). In one embodiment, the first fastening member (355) may be a bolt and the second fastening member (356) may be a nut.

[0143] The pack cover (312) may include an outer surface (312a) facing the outside of the battery pack (300) and an inner surface (312b) facing the battery module (200). The retaining member (350) may be mounted on the inner surface (312b) of the pack cover (312). For example, the first fastening member (355) may penetrate the inner surface (312b) and the outer surface (312a) of the pack cover (312). The rigid member (351) may be mounted on the inner surface (312b) of the pack cover (312), and the second fastening member (356) may be mounted on the outer surface (312a) of the pack cover (312). The pack cover (312) may be positioned between the second fastening member (356) and the rigid member (351).

[0144] The buffer unit (352) can reduce the impact caused by the contact between the battery module (200) (e.g., the module cover (211) of FIG. 2) and the restraining member (350). The buffer unit (352) can be deformed based on the impact caused by the contact with the battery module (200). By deforming the buffer unit (352), the buffer unit (352) can reduce noise and / or vibration caused by the contact between the restraining member (350) and the battery module (200). By deforming the buffer unit (352), the buffer unit (352) can absorb the dimensional deformation of the battery module (200) and the tolerance of the parts. Due to the buffer unit (352), the manufacturing convenience of the battery module (200) and / or the battery pack (300) can be increased. The buffer part (352) may be positioned closer to the module cover (211) of the battery module (200) than the rigid part (351).

[0145]

[0146] Figure 16 is a schematic diagram of a vehicle according to one embodiment.

[0147] Referring to FIG. 16, a vehicle (400) may include a body (410), a motor (420), and a battery pack (300). The description of the battery pack (300) previously described in the present disclosure may be applied to the battery pack (300) of FIG. 16. For example, the battery pack (300) may include the previously described blocking members (340, 350).

[0148] The vehicle (400) may be driven by a battery pack (300). For example, the vehicle (400) may be an electric vehicle or a hybrid vehicle. The vehicle (400) may include a motor (420). The motor (420) may be operated by current supplied from the battery pack (300). For example, the motor (420) may be operated based on current supplied from the battery pack (300).

[0149] The vehicle (400) may include a body (410) that forms at least a portion of the exterior of the vehicle (400) and accommodates a plurality of components (e.g., a battery pack (300) and a motor (420)). The body (410) may be referred to as a body. In one embodiment, a pack housing of the battery pack (300) (e.g., a pack frame (310) of FIG. 4) may be mounted to the body (410). For example, a floor member (e.g., a floor member (311) of FIG. 4) of the pack frame (310) may be mounted to the body (410) using a separate fastening member.

[0150] The battery pack (300) can supply current to components of the vehicle (400). For example, the battery pack (300) can supply current for the operation of a motor (420) and / or components not shown (e.g., electrical components).

[0151]

[0152] The above description is merely an example of applying the principles of the present disclosure, and other configurations may be further included without departing from the scope of the present disclosure.

[0153] While the embodiments of the present disclosure have been described above, the scope of the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various modifications and variations are possible without departing from the technical spirit of the present disclosure as set forth in the claims. For example, the present disclosure may be implemented by deleting some of the components in the above-described embodiments, and the embodiments may be implemented in combination with each other.

[0154]

[0155] Side 1) A battery pack includes a plurality of battery modules, each including a plurality of battery cells and a module housing that accommodates the plurality of battery cells; a pack frame that accommodates the plurality of battery modules, and a pack cover that covers the plurality of battery modules; and a blocking member positioned between the plurality of battery modules and the pack cover, wherein the blocking member may include a rigid part connected to the plurality of battery modules and a buffer part that is connected to the rigid part and faces the pack cover.

[0156] Side 2) In side 1, the module housing includes a module cover that covers the plurality of battery cells and includes a plurality of venting holes, the battery pack is positioned between the module cover and the pack cover, and further includes a flow path space configured to allow gas generated from the plurality of battery cells to flow, and the blocking member can be positioned within the flow path space.

[0157] Side 3) In side 1 or side 2, the barrier member may be positioned so as not to overlap the plurality of venting holes.

[0158] Side 4) In any one of Sides 1 to 3, the cross-sectional area of ​​the barrier member may be smaller than the sum of the cross-sectional areas of the plurality of venting holes.

[0159] Side 5) In any one of Sides 1 to 4, the barrier member may include an adhesive layer positioned between the rigid portion and the buffer portion.

[0160] Side 6) In any one of Sides 1 to 5, each of the plurality of battery modules may include a mica sheet surrounding at least a portion of the module housing.

[0161] Side 7) In side 6, the rigid body part includes a first side facing the buffer part, a second side opposite the first side and facing the module housing, and a third side surrounding at least a portion of the first side and the second side, the buffer part includes a fourth side facing the battery pack, a fifth side opposite the fourth side and having a receiving groove formed therein for accommodating the rigid body part, and a sixth side surrounding at least a portion between the fourth side and the fifth side, and the buffer part can cover the first side and the third side of the rigid body part.

[0162] Side 8) In side 7, the mica sheet includes a coupling hole for accommodating the blocking member, the blocking member is forcefully fitted into the coupling hole, and the sixth surface of the buffer portion can contact the inner surface of the mica sheet defining the coupling hole.

[0163] Side 9) In side 7 or side 8, the blocking member includes a fastening member inserted into the rigid part, and the blocking member can be coupled to the module housing using the fastening member.

[0164] Side 10) In side 9, the module housing includes a module cover having a fastening hole formed therein for accommodating at least a portion of the fastening member, and the second surface of the rigid portion and the fifth surface of the buffer portion can be disposed on the module cover.

[0165] Side 11) In any one of sides 1 to 10, the buffer may include at least one of silicone, polyurethane, and aerogel.

[0166] Side 12) In any one of Sides 1 to 11, the rigid body may include mica.

[0167] Side 13) In any one of the sides 1 to 12, the blocking member may be formed in a cylindrical shape.

[0168] Side 14) In any one of Sides 1 to 13, the elastic modulus of the rigid part is higher than the elastic modulus of the buffer part, and when the module housing is expanded, the rate of change in the first thickness of the rigid part may be smaller than the rate of change in the second thickness of the buffer part.

[0169] Side 15) The battery module includes a cell assembly including a plurality of battery cells; a module housing including a receiving portion for receiving the cell assembly and a module cover for covering the cell assembly; and a blocking member connected to the module housing, wherein the blocking member may include a rigid portion connected to the module cover and a buffer portion connected to the rigid portion.

[0170] Side 16) In side 15, the rigid body part may include a first side facing the buffer part, a second side opposite the first side and facing the module housing, and a third side surrounding at least a portion of the first side and the second side, and the buffer part may include a fourth side facing the outside of the battery module, a fifth side opposite the fourth side and having a receiving groove formed therein for accommodating the rigid body part, and a sixth side surrounding at least a portion between the fourth side and the fifth side.

[0171] Side 17) In side 16, a mica sheet is further included that surrounds at least a portion of the module housing and includes a coupling hole for receiving the blocking member, the blocking member is forcefully fitted into the coupling hole, and the sixth surface of the buffer portion can contact the inner surface of the mica sheet defining the coupling hole.

[0172] Side 18) In any one of the sides 15 to 17, the blocking member includes a fastening member inserted into the rigid part, and the blocking member can be coupled to the module housing using the fastening member.

[0173] Side 19) A battery pack includes a plurality of battery modules, each including a plurality of battery cells and a module housing that accommodates the plurality of battery cells; a pack frame that accommodates the plurality of battery modules, including a pack cover that covers the plurality of battery modules; and a blocking member positioned between the plurality of battery modules and the pack cover, wherein the blocking member may include a rigid part connected to the pack cover and a buffer part that is connected to the rigid part and faces the module housing.

[0174] Side 20) In side 19, the pack cover includes an outer surface facing the outside of the battery pack and an inner surface facing the battery module, the blocking member is coupled to the rigid body and includes a first fastening member penetrating the pack cover, and the battery pack may be secured to the outer surface of the pack cover and include a second fastening member coupled with the first fastening member.

Claims

1. A plurality of battery modules each including a plurality of battery cells and a module housing accommodating the plurality of battery cells; A pack frame including a pack cover covering the plurality of battery modules and accommodating the plurality of battery modules; and Including a barrier member positioned between the plurality of battery modules and the pack cover, A battery pack comprising a rigid member connected to the plurality of battery modules and a buffer member connected to the rigid member and facing the pack cover.

2. In paragraph 1, The module housing includes a module cover that covers the plurality of battery cells and includes a plurality of venting holes, The battery pack further includes a flow path space positioned between the module cover and the pack cover, and configured to allow gases generated from the plurality of battery cells to flow. The above-mentioned low-cost member is a battery pack located within the euro space.

3. In paragraph 2, A battery pack in which the above-mentioned member is positioned so as not to overlap the plurality of venting holes.

4. In paragraph 2, A battery pack in which the cross-sectional area of the above-mentioned member is smaller than the sum of the cross-sectional areas of the plurality of venting holes.

5. In any one of paragraphs 1 to 4, A battery pack wherein the above-mentioned member includes an adhesive layer positioned between the rigid member and the buffer member.

6. In any one of paragraphs 1 to 4, A battery pack wherein each of the plurality of battery modules includes a mica sheet surrounding at least a portion of the module housing.

7. In paragraph 6, The rigid body includes a first surface facing the buffer portion, a second surface opposite the first surface and facing the module housing, and a third surface surrounding at least a portion of the first surface and the second surface. The buffer portion includes a fourth surface facing the battery pack, a fifth surface opposite the fourth surface and having a receiving groove formed therein for receiving the rigid portion, and a sixth surface surrounding at least a portion between the fourth surface and the fifth surface. The above buffer portion is a battery pack that covers the first surface and the third surface of the rigid portion.

8. In paragraph 7, The above mica sheet includes a joining hole for accommodating the above-mentioned resistive member, A battery pack in which the above-mentioned member is forcefully fitted into the above-mentioned joining hole, and the sixth surface of the above-mentioned buffer portion is in contact with the inner surface of the above-mentioned mica sheet defining the above-mentioned joining hole.

9. In paragraph 7, The above-mentioned member includes a fastening member inserted into the rigid body, The above-mentioned member is a battery pack connected to the module housing using the above-mentioned fastening member.

10. In paragraph 9, The above module housing includes a module cover having a fastening hole formed therein for accommodating at least a portion of the fastening member, A battery pack in which the second surface of the rigid body and the fifth surface of the buffer body are placed on the module cover.

11. In any one of paragraphs 1 to 4, A battery pack wherein the buffer portion comprises at least one of silicone, polyurethane, and aerogel.

12. In any one of paragraphs 1 to 4, A battery pack wherein the rigid body includes mica.

13. In any one of paragraphs 1 to 4, The above-mentioned low-cost member is a battery pack formed in a cylindrical shape.

14. In any one of paragraphs 1 to 4, The elastic modulus of the above rigid body is higher than the elastic modulus of the above buffer body, A battery pack in which, when the module housing is expanded, the rate of change in the first thickness of the rigid portion is smaller than the rate of change in the second thickness of the buffer portion.

15. A cell assembly comprising a plurality of battery cells; A module housing including a receiving portion for receiving the cell assembly and a module cover for covering the cell assembly; and including a lower member connected to the above module housing, A battery module wherein the above-mentioned member includes a rigid member connected to the module cover and a buffer member connected to the rigid member.

16. In paragraph 15, The rigid body includes a first surface facing the buffer portion, a second surface opposite the first surface and facing the module housing, and a third surface surrounding at least a portion of the first surface and the second surface. A battery module, wherein the buffer portion includes a fourth surface facing the outside of the battery module, a fifth surface opposite the fourth surface and having a receiving groove formed therein for receiving the rigid portion, and a sixth surface surrounding at least a portion between the fourth surface and the fifth surface.

17. In paragraph 16, Further comprising a mica sheet surrounding at least a portion of the module housing and including a coupling hole for receiving the barrier member; A battery module in which the above-mentioned member is forcefully fitted into the above-mentioned joining hole, and the sixth surface of the above-mentioned buffer portion is in contact with the inner surface of the above-mentioned mica sheet defining the above-mentioned joining hole.

18. In any one of paragraphs 15 to 17, The above-mentioned member includes a fastening member inserted into the rigid body, The above-mentioned member is a battery module connected to the module housing using the above-mentioned fastening member.

19. A plurality of battery modules each including a plurality of battery cells and a module housing accommodating the plurality of battery cells; A pack frame including a pack cover covering the plurality of battery modules and accommodating the plurality of battery modules; and Including a barrier member positioned between the plurality of battery modules and the pack cover, A battery pack comprising a rigid member connected to a pack cover and a buffer member connected to the rigid member and facing the module housing.

20. In paragraph 19, The above pack cover includes an outer surface facing the outside of the battery pack and an inner surface facing the battery module, The above-mentioned member is connected to the rigid body and includes a first fastening member penetrating the pack cover, A battery pack comprising a second fastening member that is secured to the outer surface of the pack cover and is coupled to the first fastening member.

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