Battery module and battery pack

Abstract

The present invention relates to a battery module and a battery pack and, more specifically, to: a battery module in which a plurality of battery cells capable of charge and discharge are accommodated in a housing; and a battery pack provided with a plurality of these battery modules. The battery module according to one embodiment of the present invention comprises: a battery cell group having a plurality of battery cells; a housing for accommodating the battery cell group; and a sheet-type member attached to the battery cell group, wherein: the housing is provided with a protrusion forming an accommodation space in which a resin is accommodated; and the battery cell group can be supported by the protrusion. Here, the sheet-type member attached to the battery cell group can be in contact with the upper surface of the protrusion.

Description

Battery modules and battery packs

[0001] Cross-citation with related applications

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2024-0090586, filed July 9, 2024, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] The present invention relates to a battery module and a battery pack, and more particularly, to a battery module in which a plurality of battery cells capable of being charged and discharged are accommodated in a housing, and a battery pack including a plurality of such battery modules.

[0005] Unlike primary batteries, which are non-rechargeable, secondary batteries can be recharged and discharged. Low-capacity secondary batteries are used in small, portable electronic devices such as cell phones, laptops, and camcorders, while large-capacity secondary batteries are widely used as power sources for motors in hybrid vehicles and other vehicles.

[0006] Secondary batteries can be utilized in the form of battery cells. A battery cell may have a form in which multiple electrodes are alternately stacked within an outer case with a separator between them, and the internal space of the outer case is filled with an electrolyte. Multiple battery cells can be electrically connected to form a battery module.

[0007] A battery module has a shape in which a plurality of battery cells are accommodated within a housing, and a liquid type resin is accommodated within the housing to adhere the plurality of battery cells to the housing and to dissipate heat generated during charging and discharging of the battery cells to the outside. Typically, the resin is provided in a resin accommodation space formed on the lower surface of the housing, and a plurality of battery cells are positioned on the upper side of the resin.

[0008] At this time, since some portions of the multiple battery cells were inserted into the resin receiving space to pressurize the liquid type resin, there was a problem of resin overflow occurring in the receiving space. In particular, when the resin solidified beyond the designed receiving space, there was a problem of locally pressurizing the battery cell, damaging the outer material of the battery cell, and shortening the lifespan of the battery cell.

[0009] The present invention has been conceived in recognition of the above problems, and an object of the present invention is to provide a battery module capable of preventing resin from overflowing from a resin receiving space within a housing.

[0010] A battery module according to one embodiment of the present invention comprises: a battery cell group composed of a plurality of battery cells; a housing for accommodating the battery cell group; and a sheet-like member attached to the battery cell group, wherein the housing forms a receiving space for accommodating resin, and a protrusion for supporting the battery cell group is provided, and the sheet-like member attached to the battery cell group can contact an upper surface of the protrusion.

[0011] A portion of the sheet-like member may contact the upper surface of the protrusion, and the remaining portion of the sheet-like member may contact the resin within the receiving space.

[0012] A portion of the above sheet-shaped member may be attached to the upper surface of the above protrusion.

[0013] A plurality of holes can be formed in the above sheet-shaped member.

[0014] The above sheet-shaped member may have holes formed in the number of battery cells.

[0015] One hole may be formed in each of the portions of the sheet-shaped member that contact the plurality of battery cells.

[0016] The above sheet-shaped member may have a plurality of holes arranged at equal intervals.

[0017] The above sheet-shaped member may be composed of any one of silicone, PP, PET, PVC, and PE.

[0018] The above sheet-shaped member may be composed of a mesh material.

[0019] The above sheet-shaped member may have a band shape attached to both sides and the lower surface of the battery cell group.

[0020] The plurality of battery cells are arranged in a row along the width direction of the housing, and the sheet-like member can be attached to the battery cell group in a direction parallel to the direction in which the plurality of battery cells are arranged.

[0021] The above protrusion may include a first protrusion provided on one longitudinal surface of the housing; and a second protrusion provided on the other longitudinal surface of the housing.

[0022] The first protrusion and the second protrusion may each have a bar shape extending along the width direction of the housing.

[0023] The sheet-like member may include a first sheet-like member, at least a portion of which contacts the upper surface of the first protrusion; and a second sheet-like member, at least a portion of which contacts the upper surface of the second protrusion.

[0024] The distance between the first sheet-like member and the second sheet-like member may be shorter than the distance between the first protrusion and the second protrusion.

[0025] Each of the above plurality of battery cells may be a pouch cell.

[0026] The widthwise length of the above sheet-shaped member may be longer than the widthwise length of the above protrusion.

[0027] Meanwhile, a battery pack according to one embodiment of the present invention may include a battery module assembly in which a plurality of battery modules are connected; and a case that accommodates the battery module assembly.

[0028] A battery module according to one embodiment of the present invention includes a battery cell group composed of a plurality of battery cells, a housing for accommodating the battery cell group, and a sheet-like member attached to the battery cell group, wherein the housing is provided with a protrusion that forms a receiving space for accommodating resin, and the battery cell group can be supported by the protrusion. Here, the sheet-like member attached to the battery cell group can contact an upper surface of the protrusion. In this case, since the plurality of battery cells do not press the resin within the receiving space, the resin can be prevented from overflowing from the receiving space.

[0029] FIG. 1 is a drawing schematically showing how a battery module according to Example 1 of the present invention is assembled.

[0030] FIG. 2 is a drawing showing a battery cell group supported by a protrusion in a battery module according to Example 1 of the present invention.

[0031] FIG. 3 is a drawing for explaining a state in which a sheet-shaped member is attached to a battery cell group in a battery module according to Example 1 of the present invention.

[0032] FIG. 4 is a drawing for explaining the position where a sheet-shaped member is installed in a battery module according to Example 1 of the present invention.

[0033] FIG. 5 is a drawing showing a sheet-like member being torn when a battery cell expands in a battery module according to Example 1 of the present invention.

[0034] FIG. 6 is a drawing showing that a hole is formed in a sheet-like member attached to a battery cell group in a battery module according to Example 2 of the present invention.

[0035] FIG. 7 is a drawing showing a state in which a hollow resin formed on a sheet is introduced into a battery module according to Example 2 of the present invention.

[0036] Hereinafter, with reference to the attached drawings, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the invention. However, the present invention may be implemented in various different forms and is not limited or restricted by the following examples.

[0037] In order to clearly explain the present invention, a detailed description of a part that is irrelevant to the description or a related known technology that may unnecessarily obscure the gist of the present invention has been omitted, and when adding reference signs to components of each drawing in this specification, the same or similar reference signs are attached to the same or similar components throughout the specification.

[0038] In addition, terms and words used in this specification and claims should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best way.

[0039] Hereinafter, a battery module according to the present invention will be described with reference to the drawings.

[0040]

[0041] Example 1

[0042] FIG. 1 is a drawing schematically showing how a battery module according to Example 1 of the present invention is assembled.

[0043] FIG. 2 is a drawing showing a battery cell group supported by a protrusion in a battery module according to Embodiment 1 of the present invention. Specifically, FIG. 2 shows one end of a plurality of battery cells included in a battery cell group being supported upward by a protrusion formed in a housing.

[0044] FIG. 3 is a drawing for explaining a state in which a sheet-like member is attached to a battery cell group in a battery module according to Example 1 of the present invention. Specifically, FIG. 3 is a drawing showing in detail a lower area of ​​a battery cell group to which a sheet-like member is attached.

[0045] Referring to FIGS. 1 to 3, a battery module (10) according to Embodiment 1 of the present invention may include a battery cell group (100) composed of a plurality of battery cells (110), a housing (400) that accommodates the battery cell group (100), and a sheet-like member (200) attached to the battery cell group (100). The housing (400) is provided with a protrusion (410) that forms a receiving space (S) in which a resin (500) is accommodated, and the battery cell group (100) may be supported by the protrusion (410). At this time, the sheet-like member (200) attached to the battery cell group (100) may touch the upper surface of the protrusion (410).

[0046] When the battery module (10) has the structure as described above, the plurality of battery cells (110) are supported by the protrusions (410) toward the upper side of the receiving space (S), so that some of the plurality of battery cells (110) can be prevented from flowing into the receiving space (S). Accordingly, the pressure exerted by the plurality of battery cells (110) on the resin (500) within the receiving space (S) is minimized, so that resin overflow in which the resin (500) overflows from the receiving space (S) can be prevented.

[0047] A battery cell group (100) is an assembly of battery cells (110) composed of a plurality of battery cells (110), which may include a variety of battery cells (110). Each of the plurality of battery cells (110) included in the battery cell group (100) is a secondary battery capable of being charged and discharged, and these may be accommodated in a housing (400) in an electrically connected state.

[0048] Here, the plurality of battery cells (110) may be arranged in various ways within the housing (400). For example, as illustrated in FIG. 1, the plurality of battery cells (110) may be arranged in a row within the housing (400) along the width direction of the housing (400). In this case, the electrode tabs of each of the plurality of battery cells (110) may protrude toward the inner surfaces on both sides of the longitudinal direction of the housing (400).

[0049] The sheet-shaped member (200) is bonded to the battery cell group (100) to bind the battery cells (110) within the battery cell group (100), and can be bonded to the battery cell group (100) in various ways. For example, the sheet-shaped member (200) can be bonded to the battery cell group (100) with an adhesive. In this case, an adhesive surface (300) described below can be formed between the sheet-shaped member (200) and the battery cell group (100).

[0050] Additionally, the sheet-like member (200) can be attached to the battery cell group (100) in a direction parallel to the direction in which the plurality of battery cells (110) are arranged. When the plurality of battery cells (110) are arranged in a row along the width direction of the housing (400) within the housing (400), the sheet-like member (200) can be attached to the battery cell group (100) in a direction parallel to the width direction of the housing (400).

[0051] The housing (400) is a case that accommodates a battery cell group (100) to which a battery sheet-shaped member (200) is attached, and may be composed of various materials. The housing (400) may be composed of a metal material having an insulating coating layer formed thereon or a resin material. In addition, the housing (400) may have various shapes. For example, the housing (400) may have a hexahedral box shape with an empty space provided therein to accommodate the battery cell group (100). In addition, a protrusion (410) may be formed on the lower surface of the housing (400).

[0052] The protrusion (410) is a member that protrudes from the lower surface of the housing (400) into the internal space of the housing (400), and can form an accommodation space (S) inside the housing (400). Specifically, the protrusion (410) is formed on each of the longitudinal sides of the housing (400), and can have a bar shape that extends from one side of the housing (400) in the width direction to the other side.

[0053] In this case, the protrusion (410) is composed of a first protrusion (411) provided on one longitudinal surface of the housing and a second protrusion (412) provided on the other longitudinal surface of the housing, and the first protrusion (411) and the second protrusion (412) may each have a bar shape extending along the width direction of the housing. This pair of protrusions (411, 412) may form a receiving space (S) in which a resin (500) is received together with the inner surface in the width direction of the housing.

[0054] Meanwhile, the protrusion (410) may be composed of the same material as the housing (400). That is, the protrusion (410), like the housing (400), may be composed of a metal material having an insulating coating layer formed thereon or a resin material.

[0055] The resin (500) fixes a plurality of battery cells (110) to the housing (400) and releases heat generated during charging and discharging of the battery cells (110) to the outside. The resin (500) can be injected in a liquid state into the receiving space (S). This resin (500) is cured while in contact with one surface of the plurality of battery cells (110), thereby fixing the positions of the plurality of battery cells (110) within the housing (400).

[0056] In conventional battery modules, battery cells were secured within the housing by injecting resin into the bottom surface of the housing and then arranging the battery cells on top of the resin. This method had the problem of some of the resin hardening while flowing between the battery cells, pressurizing the battery cells, damaging the outer casing of the cells, and shortening their lifespan.

[0057] In the case of the battery module (10) according to the first embodiment of the present invention, a plurality of battery cells (110) in the housing (400) are supported upwardly in the receiving space (S) by the protrusions (410) while the sheet-like member (200) is attached, so that the battery cells (110) can be minimized from being submerged in the resin (500) inside the receiving space (S). Specifically, the resin (500) inside the receiving space (S) is in contact with one surface of the battery cells (110), but the zenzi cells (110) are supported upwardly by the protrusions (410), so that some of the battery cells (110) can be prevented from flowing into the receiving space (S).

[0058] That is, the pressure applied by the plurality of battery cells (110) to the resin (500) within the receiving space (S) is minimized, so that in the case of the battery module (10) according to the first embodiment of the present invention, resin overflow in which the resin (500) overflows from the receiving space (S) can be prevented.

[0059] Meanwhile, the battery cells (110) belonging to the battery cell group (100) may be configured in various types. For example, the battery cells (110) may be square or cylindrical cells. In particular, the battery cells (110) may be pouch cells in which the electrode assembly is accommodated within a pouch.

[0060] Here, the pouch includes a laminate sheet including a metal layer such as aluminum or stainless steel, and a resin layer may be formed on the outer surface and / or inner surface of the metal layer.

[0061] The metal layer can serve as a substrate that maintains mechanical strength and a barrier layer that prevents the infiltration of moisture and oxygen. In addition to preventing the inflow or leakage of foreign substances such as gas and moisture, the metal layer can be composed of aluminum or an aluminum alloy to enhance the strength of the battery case. Examples of aluminum alloys that can be used include alloy numbers 8079, 1N30, 8021, 3003, 3004, 3005, 3104, and 3105, and these can be used alone or in combination.

[0062] The first resin layer coated on the outer surface of the metal layer must have excellent resistance to the external environment in order to protect the electrode assembly from the outside. Therefore, the first resin layer is required to have excellent tensile strength and corrosion resistance relative to its thickness. For the first resin layer, a polyester resin such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN), a polyolefin resin such as polyethylene or polypropylene, etc. can be used.

[0063] The second resin layer coated on the inner surface of the metal layer can be heat-sealed to each other to seal the inner space of the pouch, and the second resin layer can be composed of a polyolefin-based resin. For example, CPP (Casted Polypropylene), chlorinated polypropylene, polyethylene, ethylene propylene copolymer, polyethylene and acrylic acid copolymer, and polypropylene and acrylic acid copolymer can be used for the second resin layer.

[0064] If the battery cell (110) is a pouch cell in which the electrode assembly is accommodated inside a pouch as described above, unlike a square or cylindrical battery, the shape of the pouch is not fixed, and thus the shape of the battery cell (110) may change depending on the shape of the space in which it is accommodated. In this case, if the first and second protrusions (411, 412) formed on the lower surface of the housing (400) support both ends of the electrode assembly inside the battery cell (110) upward, the change in the shape of the pouch-shaped battery cell (110) can be minimized.

[0065] Accordingly, it is possible to minimize the inflow of a portion of the pouch-shaped battery cells (110) into the interior of the receiving space (S). That is, the pressure exerted by the plurality of battery cells (110) on the resin (500) within the receiving space (S) is minimized, thereby preventing resin overflow from the receiving space (S).

[0066] Meanwhile, Fig. 4 is a drawing for explaining the position where the sheet-like member is seated in the battery module according to Example 1 of the present invention. Specifically, Fig. 4 illustrates a state where the sheet-like member attached to the battery cell group is seated at the boundary between the resin and the protrusion.

[0067] Referring to FIG. 4, a part of the sheet-like member (200) may contact the upper surface of the protrusion (410), and the remaining part of the sheet-like member (200) may contact the resin (500) within the receiving space (S). When the battery cell group (100) is placed within the housing (400), the sheet-like member (200) may be positioned at the boundary between the resin (500) and the protrusion (410). In this case, a part of the lower surface of the sheet-like member (200) may contact the protrusion (410), and the remaining part of the lower surface of the sheet-like member (200) may contact the resin (500) accommodated in the receiving space (S).

[0068] That is, the portion of the sheet-shaped member (200) that touches the resin (500) can be fixed to the resin (500) as the resin (500) hardens. Accordingly, the portion of the sheet-shaped member (200) that touches the resin (500) can fix the position of the battery cell group (100) inside the housing (400).

[0069] In addition, a portion of the sheet-shaped member (200) that does not touch the resin (500) can be secured to the upper side of the protrusion (410). That is, the portion of the sheet-shaped member (200) that does not touch the resin (500) is supported upward by the protrusion (410), thereby preventing the battery cell group (100) from pressing the resin (500) accommodated in the accommodation space (S). Accordingly, the portion of the sheet-shaped member (200) that does not touch the resin (500) can prevent the resin (500) from overflowing from the accommodation space (S).

[0070] Meanwhile, the width direction length of the sheet-like member (200) may be longer than the width direction length of the protrusion (410). Here, the sheet-like member (200) may cover the entire upper surface of the protrusion (410), and a portion of the sheet-like member (200) that does not touch the upper surface of the protrusion (410) may touch the resin (500). In this case, the entire upper surface of the protrusion (410) supports the sheet-like member (200) upward, so that the battery cell group (100) to which the sheet-like member (200) is attached may be firmly supported upward of the receiving space (S).

[0071] Such a sheet-like member (200) may have various shapes. In particular, the sheet-like member (200) may have a band shape that is attached to both sides and the lower surface of the battery cell group (100). Specifically, the sheet-like member (200) may include a first sheet-like member (210) at least a portion of which contacts the upper surface of the first protrusion (411) and a second sheet-like member (220) at least a portion of which contacts the upper surface of the second protrusion (412).

[0072] At this time, the distance between the first sheet-shaped member (210) and the second sheet-shaped member (220) may be shorter than the distance between the first protrusion (411) and the second protrusion (412). Therefore, a portion of the first sheet-shaped member (210) and the second sheet-shaped member (220) is in contact with the resin (500), and can be fixed to the housing (400) together with the resin (500) when the resin (500) is cured.

[0073] Meanwhile, Fig. 5 is a drawing showing a sheet-like member tearing when a battery cell expands in a battery module according to Example 1 of the present invention. Specifically, Fig. 5 shows a sheet-like member attached to battery cells tearing when each of the battery cells expands as the battery cells are charged and discharged.

[0074] When the battery cells (110) expand due to repeated charging and discharging, the battery cells (110) may apply tensile force to the attached sheet-like member (200). In this case, if the sheet-like member (200) is not torn or stretched, the sheet-like member (200) applies pressure in the opposite direction to the direction in which the battery cells (110) expand, which may damage the outer material of the battery cells (110).

[0075] To prevent this, the sheet-like member (200) should be made of a material that is prone to tearing or stretching when the battery cells (110) expand. For example, the sheet-like member (200) may be a thin tape made of any one of silicone, PP, PET, PVC, and PE. At this time, an adhesive surface (300) may be formed between the sheet-like member (200) and the battery cell group (100). When the sheet-like member (200) is made as described above, the sheet-like member (200) is more easily torn when the battery cells (110) expand, and thus, the sheet-like member (200) can be prevented from pressing the battery cells (110) when the battery cells (110) expand.

[0076] Additionally, the sheet-like member (200) may be composed of a mesh material. In this case, the sheet-like member (200) may be more easily torn than when composed of any one of silicone, PP, PET, PVC, and PE. In this case, the sheet-like member (200) may effectively prevent the battery cells (110) from being pressed when the battery cells (110) expand.

[0077]

[0078] Example 2

[0079] The battery module according to Embodiment 2 of the present invention differs from Embodiment 1 in that a plurality of holes are formed in the sheet-like member. Below, commonalities with Embodiment 1 will be omitted as much as possible, and Embodiment 2 will be described focusing on the differences. In other words, it is self-evident that, if any content not described in Embodiment 2 is required, it can be considered as the content of Embodiment 1.

[0080] Fig. 6 is a drawing showing a hole formed in a sheet-shaped member attached to a battery cell group in a battery module according to Example 2 of the present invention. Fig. 7 is a drawing showing a resin flowing into a hole formed in a sheet in a battery module according to Example 2 of the present invention.

[0081] Referring to FIGS. 6 and 7, a plurality of holes (holes, 200a) may be formed in the sheet-shaped member (200) of the battery module (10) according to Embodiment 2 of the present invention. Specifically, the sheet-shaped member (200) of the battery module (10) may include the first sheet-shaped member (210) and the second sheet-shaped member (220) described in Embodiment 1, and a plurality of holes (200a) may be formed in each of the first sheet-shaped member (210) and the second sheet-shaped member (220). In this case, the resin (500) accommodated in the accommodation space (S) flows into the plurality of holes (200a), and the resin (500) introduced into the holes (200a) contacts the battery cells (110), thereby efficiently dissipating heat from the battery cells (110).

[0082] In addition, as holes (200a) are formed in the sheet-like member (200), the sheet-like member (200) can be more easily torn when tensile force is applied. In this case, since the sheet-like member (200) is torn when the battery cells (110) expand, the sheet-like member (200) can be prevented from pressing the battery cells (110) when the battery cells (110) expand.

[0083] The spacing between the plurality of holes (200a) formed in the sheet-shaped member (200) can be formed in various ways. In particular, the plurality of holes (200a) can be arranged at equal intervals in the sheet-shaped member (200). In this case, heat can be uniformly exchanged with the battery cells (110) included in the battery cell group (100).

[0084] Meanwhile, a plurality of holes (200a) may be formed in the sheet-like member (200) as many as the number of battery cells (110). Specifically, one hole (200a) may be formed in each portion of the sheet-like member (200) that contacts a plurality of battery cells (110). In this case, the resin (500) flowing into each hole (200a) contacts each battery cell (110), and thus the heat exchange effect for each battery cell (110) may be measured.

[0085] In addition, if a hole (200a) is formed in each portion of the sheet-shaped member (200) that contacts a plurality of battery cells (110), the upper surface of the hole (200a) is blocked by one surface of the outer surface of the battery cell (110), so that the resin (500) flowing into the hole (200a) can be minimized from flowing into the empty space between the battery cells (110). In this case, the curing of the resin (500) in the empty space between the battery cells (110) can be minimized. Therefore, the cured resin (500) can be prevented from locally pressurizing the outer surface of the battery cells (110) and damaging the outer surface of the battery cells (110).

[0086]

[0087] Example 3

[0088] Embodiment 3 of the present invention relates to a battery pack, and the battery pack according to Embodiment 3 of the present invention may be provided with a plurality of battery modules (10). Specifically, the battery pack may include a battery module assembly in which a plurality of battery modules (10) are connected and a case that accommodates the battery module assembly. In addition, the battery pack may further include a battery management system (BMS) that is electrically connected to the plurality of battery modules (10) and manages the temperature and charge / discharge status of the battery modules (10).

[0089] These battery packs can be applied to various modes of transportation, such as electric bicycles, electric cars, and hybrid vehicles. Furthermore, the battery packs' applications are not limited to transportation; they can be applied to various electronic devices that utilize battery modules.

[0090]

[0091] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and various embodiments are possible within the scope equivalent to the technical idea of ​​the present invention and the patent claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

[0092]

[0093] [Explanation of symbols]

[0094] 10: Battery module 100: Battery cell group

[0095] 110: Battery cell 200: Sheet-shaped member

[0096] 210: First sheet-shaped member 220: Second sheet-shaped member

[0097] 300: Adhesive surface 400: Housing

[0098] 410: Protrusion 411: First protrusion

[0099] 412: Second protrusion 500: Resin

[0100] S: Reception space

Claims

1. A battery cell group consisting of a plurality of battery cells; a housing accommodating the above battery cell group; and A sheet-shaped member attached to the above battery cell group is included, The above housing forms a space for accommodating resin, and a protrusion for supporting the battery cell group is provided. A battery module characterized in that the sheet-shaped member attached to the battery cell group touches the upper surface of the protrusion.

2. In claim 1, A battery module characterized in that a portion of the sheet-shaped member contacts the upper surface of the protrusion, and the remaining portion of the sheet-shaped member contacts the resin within the receiving space.

3. In claim 2, A battery module characterized in that a portion of the sheet-shaped member is attached to the upper surface of the protrusion.

4. In claim 1, A battery module characterized in that a plurality of holes are formed in the sheet-shaped member.

5. In claim 4, A battery module characterized in that the number of holes formed in the sheet-shaped member is equal to the number of battery cells.

6. In claim 4, A battery module characterized in that each of the portions of the sheet-shaped member that contacts the plurality of battery cells has one hole formed therein.

7. In claim 4, A battery module characterized in that the plurality of holes are arranged at equal intervals in the sheet-shaped member.

8. In claim 1, A battery module characterized in that the sheet-shaped member is composed of any one of silicone, PP, PET, PVC, and PE.

9. In claim 1, A battery module characterized in that the above sheet-shaped member is composed of a mesh material.

10. In claim 1, A battery module characterized in that the sheet-shaped member has a band shape attached to both sides and the lower surface of the battery cell group.

11. In claim 1, The above plurality of battery cells are arranged in a row along the width direction of the housing, A battery module characterized in that the sheet-shaped member is attached to the battery cell group in a direction parallel to the direction in which the plurality of battery cells are arranged.

12. In claim 1, The above protrusion is, A first protrusion provided on one longitudinal surface of the housing; and A battery module characterized by including a second protrusion provided on the longitudinal surface of the housing.

13. In claim 12, A battery module characterized in that the first protrusion and the second protrusion each have a bar shape extending along the width direction of the housing.

14. In claim 12, The above sheet-shaped member is, A first sheet-like member, at least a portion of which contacts the upper surface of the first protrusion; and A battery module characterized in that it comprises a second sheet-like member, at least a portion of which contacts the upper surface of the second protrusion.

15. In claim 14, A battery module characterized in that the distance between the first sheet-shaped member and the second sheet-shaped member is shorter than the distance between the first protrusion and the second protrusion.

16. In claim 1, A battery module, wherein each of the plurality of battery cells is a pouch cell.

17. In claim 1, A battery module characterized in that the widthwise length of the sheet-shaped member is longer than the widthwise length of the protrusion.

18. A battery module assembly comprising a plurality of battery modules connected according to claim 1; and A battery pack comprising a case accommodating the above battery module assembly.

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