Battery module and battery pack including the same

Abstract

A battery module according to one embodiment of the present invention comprises: a battery cell stack having a plurality of battery cells stacked thereon; a module frame that accommodates the battery cell stack and has an open bottom; and at least one fixing member extending from the bottom surface of the battery cell stack to the side of the module frame, wherein both ends of the fixing member are in contact with the side of the module frame.

Description

Technology Field

[0001] The present invention relates to a battery module and a battery pack including the same, and more specifically, to a battery module with improved cooling performance and productivity and a battery pack including the same. Background Technology

[0002] With the increasing technological development and demand for mobile devices, the demand for secondary batteries as an energy source is rapidly increasing. In particular, secondary batteries are attracting significant interest as an energy source not only for mobile devices such as mobile phones, digital cameras, laptops, and wearable devices, but also for power devices such as electric bicycles, electric vehicles, and hybrid electric vehicles.

[0003] While small mobile devices use one or two or three battery cells per device, medium-to-large devices such as automobiles require high output and large capacity. Therefore, medium-to-large battery modules consisting of multiple battery cells electrically connected are used.

[0004] Since it is desirable for medium-to-large battery modules to be manufactured with the smallest possible size and weight, prismatic batteries and pouch-type batteries, which can be stacked with high integration density and have a low weight-to-capacity ratio, are mainly used as battery cells for medium-to-large battery modules. Meanwhile, the battery module may include a module frame that houses the battery cell stack in an internal space, with the front and rear sides open, to protect the battery cell stack from external shock, heat, or vibration.

[0005] FIG. 1 is a perspective view of a conventional battery module. FIG. 2 is a cross-sectional view taken along the cutting line A-A' of FIG. 1 with the battery module of FIG. 1 coupled to a pack frame.

[0006] Referring to FIGS. 1 and 2, a conventional battery module (10) comprises a battery cell stack (12) in which a plurality of battery cells (11) are stacked in one direction, a module frame (20) that accommodates the battery cell stack (12), an end plate (30) that covers the front and rear surfaces of the battery cell stack, and a busbar frame (not shown) formed between the end plate (30) and the front and rear surfaces of the battery cell stack (12).

[0007] Here, in the battery module (10), a thermally conductive resin layer (25) is located between the lower part of the battery cell stack (120) and the module frame (20). Accordingly, heat generated by the battery cell stack (12) can be transferred to the outside of the battery module (10) through the thermally conductive resin layer (25) and the lower part of the module frame (20).

[0008] However, as in the conventional method, if the outer surface of the battery cell stack (12) is sealed by a module frame (20) and an end plate (30), there is a problem that productivity is reduced due to the complexity of the process. In addition, the process of forming a thermally conductive resin layer (25) within the module frame (20) is also complex due to the problem that the cost increases accordingly.

[0009] Additionally, the battery module (10) is coupled to the pack frame and is positioned on the heat transfer member (50) and heat sink (60) located at the bottom of the pack frame. Accordingly, as heat generated in the battery cell stack (12) is transferred in the order of the thermally conductive resin layer (25), the module frame (20), the heat transfer member (50) located on the bottom surface of the module frame (20), and the heat sink (60), the battery cell stack (12) can be indirectly cooled. That is, in the conventional method, the heat transfer path of heat generated in the battery cell stack (12) within the battery module (10) is complex, which causes a problem of reduced cooling performance.

[0010] Accordingly, there is a need to develop a battery module and a battery pack containing the same that improve productivity while improving cooling performance for heat generated within the battery cell stack (12). The problem to be solved

[0011] The problem to be solved by the present invention is to provide a battery module with improved cooling performance and productivity, and a battery pack including the same.

[0012] The problems that the present invention aims to solve are not limited to those described above, and problems not mentioned will be clearly understood by those skilled in the art from this specification and the attached drawings. means of solving the problem

[0013] A battery module according to one embodiment of the present invention comprises: a battery cell stack having a plurality of battery cells stacked thereon; a module frame that accommodates the battery cell stack and has an open bottom; and at least one fixing member extending from the bottom surface of the battery cell stack to the side of the module frame, wherein both ends of the fixing member are in contact with the side of the module frame.

[0014] Both ends of the above-mentioned fixed member and the sides of the above-mentioned module frame can be joined by welding to each other.

[0015] The above-mentioned fixing member may be made of a metal material.

[0016] The above fixing member may have a strap structure that wraps around the bottom surface of the battery cell stack and a part of the side of the battery cell stack.

[0017] At least one pair of indentations is formed in the module frame, and the pair of indentations may be located on each side of the module frame.

[0018] Both ends of the above-mentioned fixed member can each be inserted into the above-mentioned pair of indentations.

[0019] The above fixing member includes a first fixing member and a second fixing member, and the first fixing member and the second fixing member may be positioned adjacent to each end of the battery cell stack.

[0020] The above pair of indentations includes a pair of first indentations and a pair of second indentations, and the pair of first indentations may be located adjacent to the front of the module frame, and the pair of second indentations may be located adjacent to the rear of the module frame.

[0021] Both ends of the first fixing member may be inserted into the pair of first indentations, and both ends of the second fixing member may be inserted into the pair of second indentations.

[0022] An adhesive layer may be positioned between both sides of the battery cell stack and the inner side of the module frame.

[0023] Compression pads are located on each side of the above-mentioned battery cell laminate, and the adhesive layer may be formed on the compression pads.

[0024] A battery pack according to another embodiment of the present invention comprises: a lower pack frame on which the above-described battery module is mounted; an upper pack frame covering the upper part of the battery module; a heat transfer member located on the lower pack frame; and a cooling member located on the lower part of the lower pack frame, wherein the bottom surface of the fixing member and the heat transfer member may come into contact.

[0025] A thermally conductive resin layer is formed on the heat transfer member, and the lower surface of the battery cell laminate and the thermally conductive resin layer can come into contact with each other.

[0026] The above thermally conductive resin layer can come into contact with the remaining surfaces of the lower surface of the battery cell laminate, excluding the surface contacted by the fixing member.

[0027] The above fixing member includes a first fixing member and a second fixing member, and the first fixing member and the second fixing member are respectively located adjacent to both ends of the battery cell laminate, and the thermally conductive resin layer may be located between the first fixing member and the second fixing member.

[0028] The above thermally conductive resin layer may be formed with a length equal to or shorter than the length of the lower surface of the battery cell laminate located between the first fixing member and the second fixing member.

[0029] The above thermally conductive resin layer may be formed with a width equal to or smaller than the width of the battery cell laminate.

[0030] The above heat transfer member may be formed by a heat transfer pad or by coating with a thermally conductive resin.

[0031] The above cooling member may consist of a cooling plate or a heat sink. Effects of the invention

[0032] According to the embodiments, the lower part of the module frame included in the battery module is open, so that productivity can be improved, and the lower surface of the battery cell stack of the battery module comes into contact with the heat transfer member of the pack frame, so that cooling performance and productivity can be improved.

[0033] The effects of the present invention are not limited to the effects described above, and unmentioned effects will be clearly understood by those skilled in the art from this specification and the accompanying drawings. Brief explanation of the drawing

[0034] Figure 1 is a perspective view of a conventional battery module. Figure 2 is a cross-sectional view taken along the cutting line A-A' of Figure 1 with the battery module of Figure 1 combined with the pack frame. FIG. 3 is a perspective view of a battery module according to one embodiment of the present invention. FIG. 4 is an exploded perspective view showing the state in which the fixing member is disassembled in the battery module of FIG. 3. FIG. 5 is a perspective view showing a battery cell stack included in the battery module of FIG. 3. Figure 6 is a cross-sectional view taken along the cutting line BB of Figure 3. Figure 7 is a cross-sectional view taken along the cutting line CC of Figure 3. FIG. 8 is a perspective view of a battery pack according to another embodiment of the present invention. Fig. 9 is an exploded perspective view of the battery pack of Fig. 8. Figure 10 is a cross-sectional view taken along the cutting line DD of Figure 8. FIG. 11 is a cross-sectional view taken along the cutting line EE of FIG. 8. Specific details for implementing the invention

[0035] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0036] To clearly explain the present invention, parts unrelated to the description have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0037] Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings.

[0038] Furthermore, throughout the specification, when a part is described as “comprising” a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0039] Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side.

[0040] Hereinafter, a battery module according to an embodiment of the present invention will be described. However, the description herein will be based on the front side of the battery module, but is not necessarily limited thereto, and the description may be identical or similar in the case of the rear side.

[0041] FIG. 3 is a perspective view of a battery module according to an embodiment of the present invention. FIG. 4 is an exploded perspective view showing a state in which a fixing member is disassembled in the battery module of FIG. 3. FIG. 5 is a perspective view showing a battery cell stack included in the battery module of FIG. 3.

[0042] Referring to FIGS. 3 and 5, the battery module (100) comprises a battery cell stack (120) in which a plurality of battery cells (110) are stacked in one direction, a module frame (200) that accommodates the battery cell stack (120), an end plate (300) that covers the front and rear surfaces of the battery cell stack, and a busbar frame (not shown) formed between the end plate (300) and the front and rear surfaces of the battery cell stack (120). Here, a busbar electrically connected to the battery cell stack (120) may be located in the busbar frame (not shown).

[0043] Referring to FIG. 5, the battery cell stack (120) housed in the module frame (200) comprises a plurality of battery cells (110) stacked therein, and preferably, the battery cells (110) are pouch-type battery cells. The battery cells (110) can be manufactured by housing an electrode assembly in a pouch case made of a laminate sheet including a resin layer and a metal layer, and then heat-sealing the sealing portion of the pouch case. Such battery cells (110) can be composed of a plurality of such cells, and the plurality of battery cells (110) form a stacked battery cell stack (120) so that they can be electrically connected to each other.

[0045] Below, the module frame (200) and the fixing member (400) will be described in more detail.

[0046] FIG. 6 is a cross-sectional view taken along the cutting line BB of FIG. 3. FIG. 7 is a cross-sectional view taken along the cutting line CC of FIG. 3.

[0047] Referring to FIGS. 4 and 6, the module frame (200) may have an open bottom. In other words, the bottom surface of the battery cell stack (120) housed in the module frame (200) may be exposed to the outside. For example, it may be a U-shaped frame that includes the top and sides, with the bottom, front, and rear surfaces open. However, the module frame (200) is not limited to this and may be replaced with a frame such as one side being connected to the top of an L-shaped frame, or a mono-frame with an open bottom that surrounds the battery cell stack (120) excluding the front and rear surfaces.

[0048] Accordingly, the lower part of the module frame (200) can be omitted from the heat transfer path of the heat generated in the battery cell stack (120), thereby simplifying the heat transfer path and improving cooling performance. Additionally, the size of the battery cell (110) can be increased by the thickness of the lower frame omitted from the module frame (200), so that the capacity of the battery module (100) can be increased. Furthermore, as the process of the module frame (200) is simplified, the manufacturing cost is reduced, and productivity can be improved.

[0049] Referring to FIGS. 3, 4, and 7, a battery module (100) according to one embodiment of the present invention includes at least one fixing member (400) extending from the bottom surface of a battery cell stack (120) to the side of a module frame (200).

[0050] Here, both ends of the fixing member (400) may each come into contact with the side of the module frame (200). For example, both ends of the fixing member (400) may each come into contact with the outer surface of the module frame (200). Accordingly, the process required for combining the fixing member (400) and the module frame (200) can be simplified, and the process time can be reduced. As another example, both ends of the fixing member (400) may each come into contact with the inner surface of the module frame (200). Accordingly, the fixing member (400) is not exposed to the outside, so that the combination of the battery module (100) and other components can be facilitated.

[0051] Additionally, when both ends of the fixing member (400) are in contact with the sides of the module frame (200), the lower surface of the fixing member (400) may be positioned on the same horizontal plane as the two side ends of the module frame (200) or higher therefrom. Accordingly, even when the fixing member (400) is coupled to the module frame (200), the lower surface of the battery module (100) does not have a height difference relative to the two side ends of the module frame (200), so that the battery module (100) can be easily coupled with other components.

[0052] In another embodiment of the present invention, at least one pair of recesses (210, 250) may be formed in the module frame (200). Here, the pair of recesses (210, 250) may be located on each side of the module frame (200). More specifically, the pair of recesses (210, 250) may be located on each side of the module frame (200), and the pair of recesses (210, 250) may be formed in a position facing each other. Here, both ends of the fixing member (400) may be inserted into each of the pair of recesses (210, 250).

[0053] Additionally, when the fixing member (400) is inserted into each of the pair of recesses (210, 250), the lower surface of the fixing member (400) may be positioned on the same horizontal plane as the two side ends of the module frame (200) or higher therefrom. Accordingly, even when the fixing member (400) is coupled to the module frame (200), the lower surface of the battery module (100) does not have a height difference relative to the two side ends of the module frame (200), so that the battery module (100) can be easily coupled with other components.

[0054] Referring to FIG. 3, the fixing member (400) may have a strap structure that wraps around the bottom surface of the battery cell stack (120) and part of the side of the battery cell stack (120). More specifically, the fixing member (400) may be in contact with the bottom surface of the battery cell stack (120), but may be bent at both corners of the bottom surface of the battery cell stack (120) and extend between the side of the battery cell stack (120) and the module frame (200).

[0055] Additionally, in the fixing member (400), the thickness of the portion in contact with the bottom surface of the battery cell stack (120) may be equal to or greater than the thickness of the portion extending between the side of the battery cell stack (120) and the module frame (200). Accordingly, even when the fixing member (400) is coupled to the module frame (200), the load of the battery cell stack (120) is sufficiently supported, and the space between the side of the battery cell stack (120) and the module frame (200) is not excessively separated, thereby ensuring sufficient rigidity of the battery module (100).

[0056] For example, the fixing member (400) may be made of a metal material. However, the material of the fixing member (400) is not limited to this, and any material that can secure a certain rigidity while having high thermal conductivity may be applied.

[0057] Here, both ends of the fixed member (400) and the side of the module frame (200) can be welded together. In the case where the module frame (200) according to one embodiment includes a pair of recesses (210, 250), both ends of the fixed member (400) can be welded to each of the pair of recesses (210, 250). However, the method of fixing between the fixed member (400) and the module frame (200) is not limited to this, and any method capable of fixing between the fixed member (400) and the side of the module frame (200) is applicable.

[0058] Accordingly, in the battery module (100) according to the present embodiment, the fixing member (400) can prevent the battery cell stack (120) from detaching from the module frame (200). In addition, the fixing member (400) can reinforce the reduced rigidity caused by the opening of the lower part of the module frame (200).

[0059] Additionally, the fixing member (400) includes a first fixing member (410) and a second fixing member (450), and the first fixing member (410) and the second fixing member (450) may be positioned adjacent to each other at both ends of the battery cell stack (120).

[0060] In the case where a module frame (200) according to one embodiment includes a pair of recesses (210, 250), the pair of recesses (210, 250) includes a pair of first recesses (210) and a pair of second recesses (250), and the pair of first recesses (210) may be located adjacent to the front of the module frame (200), and the pair of second recesses (250) may be located adjacent to the rear of the module frame (200). Here, both ends of the first fixing member (410) may be inserted into the pair of first recesses (210), and both ends of the second fixing member (450) may be inserted into the pair of second recesses (250).

[0061] However, the above-described positions for the first fixed member (410) and the second fixed member (450), and the pair of first indentations (210) and the pair of second indentations (250) are exemplary, and any position that prevents the battery cell stack (120) from detaching from the module frame (200) is applicable.

[0062] Referring to FIGS. 3, 6, and 7, in this embodiment, the lower surface of the battery cell stack (120) may have the remaining surface exposed to the outside, excluding the surface contacted by the fixing member (400). More specifically, when comparing FIGS. 6 and 7, a portion of the lower surface of the battery cell stack (120) may be contacted by the first fixing member (410), and the remaining surface, excluding the surface contacted by the first fixing member (410), may be exposed to the outside. Here, although the description is based on the front surface of the battery module (100), it can be described in the same way based on the rear surface of the battery module (100).

[0063] Accordingly, even though the lower part of the module frame (200) is open, the battery cell stack (120) can be stably accommodated within the module frame (200) by means of a fixing member (400). In addition, the lower surface of the battery cell stack (120), excluding the surface contacted by the fixing member (400), is exposed to the outside, so the cooling performance of the battery cell stack (120) can also be improved.

[0064] Referring to FIGS. 5 and 6, compression pads (170) may be positioned on each side of a battery cell stack (120), and an adhesive layer (150) may be formed on the compression pads (170). Here, the compression pads (170) may extend along the outer surface of the battery cell stack (120). As an example, the compression pads (170) may be pads made of polyurethane material. However, they are not limited thereto, and any material capable of absorbing volume changes when the battery cell (110) expands may be applied.

[0065] Accordingly, the compression pad (170) can easily absorb the expansion generated in the battery cell (110) included in the battery cell stack (120) and pressurize the outer surface of the battery cell stack (120).

[0066] According to another embodiment, the compression pad (170) is omitted, and an adhesive layer (150) may be positioned between the two sides of the battery cell stack (120) and the inner side of the module frame (200). Here, the two sides of the battery cell stack (120) may refer to the outer surface of the battery cell (110) located at the outermost edge. Additionally, the adhesive layer (150) may extend along the length and / or width direction on one side of the battery cell (110).

[0067] Additionally, the adhesive layer (150) may be formed by being made of tape or coated with an adhesive binder. More preferably, the adhesive layer (150) may be coated with an adhesive binder or made of double-sided tape so that the battery cell laminate (120) and the module frame (200) can be easily fixed. However, it is not limited thereto, and any material having adhesive performance capable of fixing the sides of the battery cell (110) and the module frame (200) to each other may be applied without limitation.

[0068] Accordingly, even though the lower part of the module frame (200) is open, the battery cell stack (120) can be more stably accommodated within the module frame (200).

[0070] A battery pack according to another embodiment of the present invention may include the battery module described above, and one or more battery modules may be packaged within a pack case to form a battery pack.

[0071] Hereinafter, a battery pack according to an embodiment of the present invention will be described. However, the description herein will be based on a cross-section of a portion of a battery module mounted in the battery pack, but is not necessarily limited thereto, and other battery modules mounted in the battery pack may also be described in the same or similar manner.

[0073] FIG. 8 is a perspective view of a battery pack according to another embodiment of the present invention. FIG. 9 is an exploded perspective view of the battery pack of FIG. 8.

[0074] Referring to FIGS. 8 and 9, a battery pack (1000) according to another embodiment of the present invention includes a pack frame (1200, 1300) on which a battery module (100) is mounted. Here, the pack frame (1200, 1300) may include an upper pack frame (1200) that covers the upper portion of a plurality of battery modules (100) and a lower pack frame (1300) on which a plurality of battery modules (100) are each mounted. Here, a thermally conductive resin layer (1340) may be formed on the lower surface of the lower pack frame (1300).

[0075] Additionally, the lower pack frame (1300) includes a plurality of module areas, and a battery module (100) can be mounted in the module areas. Here, as the battery module (100) is mounted in the module areas, the lower surface of the battery cell stack (120) and the thermally conductive resin layer (1340) can come into contact.

[0076] Accordingly, heat generated in the battery cell (110) is transferred to a thermally conductive resin layer (1340) that is in direct contact with the center of the lower surface of the battery cell stack (120), thereby improving the cooling performance of the battery module (100) and reducing the cooling variation between the battery cells (110). In addition, the lifespan of the battery module (100) can also be further improved.

[0077] For example, the thermally conductive resin layer (1340) may be formed by applying a thermally conductive resin or attaching a thermal pad to each module area of ​​the lower pack frame (1300) before the battery module (100) is mounted on the module area of ​​the lower pack frame (1300). When a thermally conductive resin is applied, the thermally conductive resin layer (1340) may be formed as the thermally conductive resin hardens.

[0078] As another example, the thermally conductive resin layer (1340) may be formed by applying a thermally conductive resin or attaching a thermal pad to the lower surface of the battery module (100) before the battery module (100) is mounted on the module area of ​​the lower pack frame (1300). In the case where a thermally conductive resin is applied, the battery module (100) may be mounted on the module area of ​​the lower pack frame (1300) before the thermally conductive resin applied to the lower surface of the battery module (100) hardens, and the thermally conductive resin layer (1340) may be formed as the thermally conductive resin hardens.

[0079] Accordingly, the lower surface of the battery module (100) can be stably fixed to the thermally conductive resin layer (1340). In addition, the thermally conductive resin layer (1340) can be formed separately from the module frame (200) of the battery module (100), so that the manufacturing cost is reduced as the process is simplified, and productivity can be improved.

[0080] FIG. 10 is a cross-sectional view taken along the cutting line DD of FIG. 8. FIG. 11 is a cross-sectional view taken along the cutting line EE of FIG. 8.

[0081] Referring to FIGS. 10 and 11, in this embodiment, the battery pack (1000) includes a heat transfer member (1350) located on a lower pack frame (1300) and a cooling member (1360) located on the lower part of the lower pack frame (1300). More specifically, a thermally conductive resin layer (1340) may be formed on the heat transfer member (1350).

[0082] Here, the bottom surface of the fixing member (400) according to the present embodiment and the heat transfer member (1350) may come into contact, and a portion of the lower surface of the battery cell stack (120) may come into contact with the thermally conductive resin layer (1340). More specifically, the thermally conductive resin layer (1340) may come into contact with the remaining surface of the lower surface of the battery cell stack (120), excluding the surface that the fixing member (400) comes into contact with.

[0083] Accordingly, the battery cell stack (120) is stably accommodated within the module frame (200) by the fixing member (400), and the remaining surface of the lower surface of the battery cell stack (120), excluding the surface contacted by the fixing member (400), is in direct contact with the thermally conductive resin layer (1340), thereby improving the cooling performance of the battery cell stack (120).

[0084] As described above, the fixing member (400) includes a first fixing member (410) and a second fixing member (450), and the first fixing member (410) and the second fixing member (450) may be positioned adjacent to each other at both ends of the battery cell stack (120).

[0085] For example, the thermally conductive resin layer (1340) may be located between the first fixing member (410) and the second fixing member (450). Additionally, the thermally conductive resin layer (1340) may be formed to be the same size as or smaller than the size of the lower surface of the battery cell stack (120) located between the first fixing member (410) and the second fixing member (450).

[0086] More specifically, referring to FIG. 10, the width of the thermally conductive resin layer (1340) may be equal to or smaller than the width of the battery cell stack (120). Also, referring to FIG. 11, the length of the thermally conductive resin layer (1340) may be equal to or smaller than the length of the lower surface of the battery cell stack (120) located between the first fixing member (410) and the second fixing member (450).

[0087] Accordingly, the battery cell stack (120) is stably accommodated within the module frame (200) by the fixing member (400), and the surface that is in direct contact with the thermally conductive resin layer (1340) on the lower surface of the battery cell stack (120) can be maximized, thereby further improving the cooling performance of the battery cell stack (120).

[0088] Here, the heat transfer member (1350) may be located on the lower part of the lower pack frame (1300). Additionally, the heat transfer member (1350) may extend along the lower part of the lower pack frame (1300).

[0089] For example, the heat transfer member (1350) may be a thermal pad with added thermally conductive powder or a thermally conductive resin layer formed by coating with a thermally conductive resin. Additionally, the heat transfer member (1350) may be a plate-shaped structure and may include silicone resin and a thermally conductive material. There are no particular limitations on the thermally conductive material, and it may include metal powder, graphite, etc. More preferably, the heat transfer member (1350) is coated with a thermally conductive resin with strong adhesive properties, and as the thermally conductive resin of the heat transfer member (1350) hardens, the lower surface of the battery cell laminate (120) can be fixed to the heat transfer member (1350).

[0090] Accordingly, the heat transfer member (1350) can directly receive heat generated from the battery cell stack (120) within the battery module (100), thereby simplifying the heat transfer path. Additionally, the thermal resistance is lowered, increasing the heat transfer efficiency to the cooling member (1360) and improving the cooling performance.

[0091] The cooling member (1360) may be located at the bottom of the pack frame (1200). Additionally, the cooling member (1360) may extend along the bottom of the pack frame (1200). Additionally, the cooling member (1360) may be in contact with a heat transfer member (1500) located on the bottom of the pack frame (1200).

[0092] For example, the cooling member (1360) may be composed of a cooling plate or a heat sink. Here, the cooling member (1360) may include a cooling channel. The cooling channel may include an inlet and an outlet formed on at least one side of the cooling member (1360). Additionally, cooling water may be injected into the cooling member (1360) through the inlet and discharged through the outlet. That is, a circulation structure may be formed in which a refrigerant introduced from outside the battery pack (1000) absorbs heat generated from each component inside the battery pack (1000) and is then discharged back outside the battery pack (1000).

[0093] Accordingly, the cooling member (1360) can receive and cool the heat generated within the battery module (100) through the heat transfer member (1350), and as the heat transfer path is simplified, the cooling performance can also be further improved.

[0095] A device according to another embodiment of the present invention may be equipped with the battery module and battery pack including the above-described battery module.

[0096] The above-mentioned device may be applied to means of transportation such as electric bicycles, electric vehicles, and hybrid vehicles, but the present invention is not limited thereto and may be applied to various devices capable of using a battery module and a battery pack including the same, and this also falls within the scope of the rights of the present invention.

[0097] Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention. Explanation of the symbols

[0098] 100: Battery module 110: Battery cell 120: Battery cell laminate 150: Adhesive layer 200: Module Frame 300: End plate 400: Fixed member 1000: Battery pack 1200: Upper Pack Frame 1300: Bottom pack frame 1340: Thermally conductive resin layer 1350: Heat transfer element 1360: Cooling element

Claims

Claim 1 A battery cell stack having a plurality of battery cells stacked thereon; a module frame that accommodates the battery cell stack and has an open bottom; and at least one fixing member extending from the bottom surface of the battery cell stack to the side of the module frame, wherein both ends of the fixing member each contact the side of the module frame and at least one pair of indentations are formed in the module frame, wherein the pair of indentations are each located on both sides of the module frame. Claim 2 A battery module in which both ends of the fixed member and the side of the module frame are welded together to join in claim 1. Claim 3 In paragraph 2, the fixed member is a battery module made of a metal material. Claim 4 In paragraph 2, the fixing member is a battery module having a strap structure that wraps around the bottom surface of the battery cell stack and a portion of the side of the battery cell stack. Claim 5 In paragraph 4, the lower surface of the battery cell stack is a battery module in which the remaining surface, excluding the surface contacted by the fixing member, is exposed to the outside. Claim 6 delete Claim 7 In claim 1, each end of the fixed member is a battery module inserted into the pair of indentations. Claim 8 In claim 7, the fixing member comprises a first fixing member and a second fixing member, and the first fixing member and the second fixing member are each positioned adjacent to both ends of the battery cell stack. Claim 9 In claim 8, the above-mentioned pair of indentations includes a pair of first indentations and a pair of second indentations, wherein the pair of first indentations is located adjacent to the front of the module frame and the pair of second indentations is located adjacent to the rear of the module frame, forming a battery module. Claim 10 A battery module according to claim 9, wherein both ends of the first fixed member are each inserted into the pair of first indentations, and both ends of the second fixed member are each inserted into the pair of second indentations. Claim 11 A battery module according to claim 1, wherein an adhesive layer is located between both sides of the battery cell stack and the inner side of the module frame. Claim 12 A battery module in which, in claim 11, compression pads are respectively located on both sides of the battery cell stack, and the adhesive layer is formed on the compression pads. Claim 13 A battery pack comprising at least one battery module including: a battery cell stack having a plurality of battery cells stacked thereon; a module frame that accommodates the battery cell stack and has an open bottom; and at least one fixing member extending from the bottom surface of the battery cell stack to the side of the module frame, wherein the battery pack comprises: a lower pack frame on which the battery module is mounted; an upper pack frame covering the top of the battery module; a heat transfer member located on the lower pack frame; and a cooling member located on the bottom of the lower pack frame, wherein both ends of the fixing member included in the battery module each contact the side of the module frame, and the bottom surface of the fixing member contacts the heat transfer member. Claim 14 A battery pack according to claim 13, wherein a thermally conductive resin layer is formed on the heat transfer member, and the lower surface of the battery cell laminate and the thermally conductive resin layer are in contact with each other. Claim 15 In claim 14, the above thermally conductive resin layer is in contact with the remaining surface of the lower surface of the battery cell laminate, excluding the surface in contact with the fixing member. Claim 16 In claim 15, the fixing member comprises a first fixing member and a second fixing member, wherein the first fixing member and the second fixing member are respectively located adjacent to both ends of the battery cell laminate, and the thermally conductive resin layer is located between the first fixing member and the second fixing member, forming a battery pack. Claim 17 In claim 16, the thermally conductive resin layer is formed to have a length equal to or shorter than the length of the lower surface of the battery cell laminate located between the first fixing member and the second fixing member. Claim 18 In claim 17, the thermally conductive resin layer is formed with a width equal to or smaller than the width of the battery cell laminate, in a battery pack. Claim 19 In paragraph 13, the above-mentioned heat transfer member is a battery pack formed by being composed of a heat transfer pad or coated with a thermally conductive resin. Claim 20 In paragraph 13, the cooling member is a battery pack comprising a cooling plate or a heat sink.

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