Battery pack and device including same

Abstract

A battery pack according to an embodiment of the present invention includes: a battery module including a battery cell stack in which a plurality of battery cells are stacked and a module frame in which the battery cell stack is stored; and a pack frame in which the battery module is stored, wherein a cooling flow path through which a refrigerant flows is formed in the bottom part of the pack frame, and an opening part is formed in the bottom part of the pack frame, so that the lower part of the module frame and the refrigerant come into direct contact with each other, and at least one protrusion part protruding from the outer surface of the lower part of the module frame is formed.

Description

Battery pack and device including same

[0001] Cross-citation with related application(s)

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2023-0126357, filed September 21, 2023, the entire contents of which are incorporated herein by reference.

[0003] The present invention relates to a battery pack and a device including the same, and more particularly, to a battery pack having improved cooling performance and a device including the same.

[0004] In modern society, the widespread use of portable devices like cell phones, laptops, camcorders, and digital cameras has fueled active development of technologies related to these devices. Furthermore, rechargeable secondary batteries are increasingly being used as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) to address air pollution caused by conventional gasoline-powered vehicles. This, in turn, heightens the need for further development of these batteries.

[0005] Currently commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries are attracting attention for their advantages, including virtually no memory effect compared to nickel-based batteries, free charging and discharging, a very low self-discharge rate, and high energy density.

[0006] These lithium secondary batteries primarily use lithium oxide and carbon materials as the positive and negative electrode active materials, respectively. The lithium secondary battery comprises an electrode assembly comprising a positive electrode plate and a negative electrode plate, each coated with the positive and negative electrode active materials, with a separator interposed between them, and a battery case that seals and houses the electrode assembly together with an electrolyte.

[0007] In general, lithium secondary batteries can be classified into can-type secondary batteries in which the electrode assembly is built into a metal can and pouch-type secondary batteries in which the electrode assembly is built into a pouch of an aluminum laminate sheet, depending on the shape of the outer packaging material.

[0008] Secondary batteries used in small devices are configured with two or three battery cells. However, secondary batteries used in medium- to large-sized devices such as automobiles utilize battery modules in which multiple battery cells are electrically connected. These battery modules enhance capacity and output by forming a battery cell stack by connecting multiple battery cells in series or parallel. Furthermore, one or more battery modules may be equipped with various control and protection systems, such as a BMS (Battery Management System) and a cooling system, to form a battery pack.

[0009] Secondary batteries can experience performance degradation and, in severe cases, even explosion or fire if exposed to temperatures exceeding their optimal levels. In particular, battery modules or battery packs comprising multiple secondary batteries, or battery cells, can experience a rapid and severe temperature rise due to the accumulation of heat from these cells within a confined space. In other words, battery modules comprising stacked cells and battery packs equipped with such modules can achieve high output, but it is difficult to remove the heat generated by the cells during charging and discharging. If the heat dissipation of the battery cells is inadequate, the cell deteriorates more quickly, shortening its lifespan and increasing the risk of explosion or fire.

[0010] Moreover, battery modules included in vehicle battery packs are frequently exposed to direct sunlight and may be placed in high-temperature conditions such as summer or desert regions.

[0011] Therefore, when constructing a battery module or battery pack, it is very important to secure stable and effective cooling performance.

[0012] Fig. 1 is a perspective view showing a conventional battery module, and Fig. 2 is a cross-sectional view taken along the cutting line A-A' of Fig. 1. In particular, Fig. 2 additionally shows a heat transfer member and a heat sink located below the battery module.

[0013] Referring to FIGS. 1 and 2, a conventional battery module (10) has a plurality of battery cells (11) stacked to form a battery cell stack (20), and the battery cell stack (20) is housed in a module frame (30).

[0014] As described above, since the battery module (10) includes a plurality of battery cells (11), it generates a large amount of heat during the charging and discharging process. As a cooling means, the battery module (10) may include a thermally conductive resin layer (40) positioned between the battery cell stack (20) and the bottom portion (31) of the module frame (30). In addition, when the battery module (10) is mounted on the pack frame to form a battery pack, a heat transfer member (50) and a heat sink (60) may be sequentially positioned under the battery module (10). The heat transfer member (50) may be a heat dissipation pad. The heat sink (60) may have a coolant passage formed therein.

[0015] Heat generated from the battery cell (11) is transferred to the outside of the battery module (10) through the thermally conductive resin layer (40), the bottom part (31) of the module frame (30), the heat transfer member (50), and the heat sink (60) in sequence.

[0016] However, in the case of the conventional battery module (10), the heat transfer path is complex as described above, making it difficult for the heat generated from the battery cell (11) to be effectively transferred. The module frame (30) itself may lower the heat conduction characteristics, and a fine air layer such as an air gap that may be formed between each of the module frame (30), the heat transfer member (50), and the heat sink (60) may also be a factor that lowers the heat conduction characteristics.

[0017] As other demands for battery modules, such as increased capacity, continue to arise, it is practically necessary to develop battery modules that can satisfy these various requirements while also improving cooling performance.

[0018] The problem to be solved by the present invention is to provide a battery pack with improved cooling performance and a device including the same.

[0019] However, the problems to be solved by the embodiments of the present invention are not limited to the problems described above and can be expanded in various ways within the scope of the technical ideas included in the present invention.

[0020] A battery pack according to one embodiment of the present invention comprises: a battery module including a battery cell stack in which a plurality of battery cells are stacked and a module frame in which the battery cell stack is accommodated; and a pack frame in which the battery module is accommodated; wherein a cooling path through which a coolant flows is formed in a bottom portion of the pack frame, an opening is formed in the bottom portion of the pack frame, so that the coolant is in direct contact with a lower portion of the module frame, and at least one protrusion is formed on an outer surface of the lower portion of the module frame.

[0021] The above opening is an area formed on the upper side of the cooling channel, and can connect the space between the cooling channel and the bottom part of the pack frame.

[0022] At least one protrusion may be formed on the outer surface of the lower portion of the module frame.

[0023] The above protrusion may be a plate shape that protrudes vertically from the outer surface of the lower portion of the module frame.

[0024] One end of the above protrusion may be in contact with the lower end of the cooling channel.

[0025] One end of the above protrusion may be spaced apart from the lower end of the cooling channel.

[0026] The above protrusion can extend along one direction of the battery module and guide the flow of the coolant along the one direction.

[0027] The above protrusion can be formed integrally with the module frame through an extrusion process.

[0028] The above protrusion can be welded to the outer surface of the lower part of the module frame.

[0029] Between the lower portion of the module frame and the bottom portion of the pack frame, a gasket may be positioned along the edge of the opening to prevent leakage of the refrigerant.

[0030] The above battery module can be mounted and connected to the bottom portion of the pack frame.

[0031] The above battery module may include a mounting portion having a mounting hole formed therein. A mounting bolt may pass through the mounting hole and be fastened to the bottom portion of the pack frame, or a nut may pass through the pack frame hole formed in the bottom portion of the pack frame and be fastened thereto.

[0032] Between the lower portion of the module frame and the bottom portion of the pack frame, a gasket may be positioned along the edge of the opening to prevent leakage of the refrigerant.

[0033] A device according to one embodiment of the present invention comprises a battery module including a battery cell stack in which a plurality of battery cells are stacked and a module frame in which the battery cell stack is accommodated; and a pack frame in which the battery module is accommodated; and a cooling path through which a coolant flows is formed in a bottom portion of the pack frame, and an opening is formed in the bottom portion of the pack frame, so that the coolant is in direct contact with a lower portion of the module frame.

[0034] According to embodiments of the present invention, a cooling channel through which a coolant flows is formed at the bottom of the pack frame, and the coolant flowing through the cooling channel is brought into direct contact with the lower part of the module frame, thereby improving cooling performance compared to a conventional battery pack structure in which the lower part of the pack frame is located between the lower part of the module frame and the coolant.

[0035] Additionally, the cooling performance of the module can be improved by increasing the surface area that the refrigerant comes into contact with through the protrusions protruding from the lower part of the module frame.

[0036] In addition, the flow of refrigerant can be improved by forming a refrigerant channel within the cooling path through a protrusion protruding from the lower part of the module frame.

[0037] Additionally, by positioning a gasket between the lower part of the module frame and the bottom part of the pack frame, the effects of fixing the module and preventing refrigerant leakage can be achieved.

[0038] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0039] Figure 1 is a perspective view showing a conventional battery module.

[0040] Fig. 2 is a cross-sectional view showing a cross-section taken along the cutting line A-A' of Fig. 1.

[0041] FIG. 3 is a perspective view showing a pouch-type battery according to one embodiment of the present invention.

[0042] Figure 4 is an exploded perspective view showing a battery module according to one embodiment of the present invention.

[0043] FIG. 5 is a partial perspective view of a battery module and a battery pack according to one embodiment of the present invention.

[0044] Fig. 6 is a cross-sectional view showing a cross-section taken along the cutting line B-B' of Fig. 5.

[0045] FIG. 7 is a cross-sectional view of a battery module and a battery pack according to another embodiment of the present invention.

[0046] Fig. 8 is a perspective view showing the battery module of Fig. 4 in an assembled state at different angles so that its lower part is visible.

[0047] Figure 9 is a partial perspective view showing a mounting method and gasket of a battery module included in a battery pack.

[0048] 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 invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

[0049] In order to clearly explain the present invention, parts that are not related to the description are omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0050] Furthermore, the sizes and thicknesses of each component shown in the drawings are arbitrarily indicated for convenience of explanation, and thus the present invention is not necessarily limited to the illustrated components. In the drawings, the thicknesses are enlarged to clearly represent various layers and regions. Furthermore, in the drawings, the thicknesses of some layers and regions are exaggerated for convenience of explanation.

[0051] Furthermore, when we say that a layer, membrane, region, plate, or other part is "on" or "over" another part, this includes not only cases where it is "directly on" the other part, but also cases where there are other parts in between. Conversely, when we say that a part is "directly on" another part, it means that there are no other parts in between. Furthermore, saying that a part is "on" or "over" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "above" or "over" the direction opposite to gravity.

[0052] Additionally, throughout the specification, whenever a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated.

[0053] Additionally, throughout the specification, when we say "in plan", we mean when the target portion is viewed from above, and when we say "in cross section", we mean when the target portion is viewed from the side in a cross-section cut vertically.

[0054] Fig. 3 is a perspective view showing a pouch-type battery according to one embodiment of the present invention. Fig. 4 is an exploded perspective view showing a battery module according to one embodiment of the present invention.

[0055] Referring to FIGS. 3 and 4, the battery module (100) according to the present embodiment includes a battery cell stack (120) formed by stacking a plurality of battery cells (110). In the battery cell stack (120), a plurality of battery cells (110) may be stacked in one direction. There is no particular limitation on the type of the battery cells (110) according to the present embodiment, as long as they are gathered in plurality. That is, the battery cell (110) according to the present embodiment may be a pouch-type battery cell, a square battery cell, or a cylindrical battery cell. Hereinafter, as an example, the battery cell (110) according to the present embodiment being a pouch-type battery cell will be described.

[0056] According to one embodiment, the battery cell (110) may have a structure in which two electrode leads (115) face each other and protrude from each end of the battery body (113). As another embodiment, a structure in which all of the electrode leads (115) of the battery cell (110) protrude in one direction is also possible. One of the electrode leads (115) is a positive electrode lead, and the other is a negative electrode lead. In addition, the battery cell (110) may be manufactured in a pouch shape by housing an electrode assembly (not shown) in a battery case (117) including the battery body (113).

[0057] In addition, the battery cell (110) includes a connecting portion (119), which is a region extending along the edge, and a protrusion (110p) of the battery cell (110), called a bat-ear, may be formed at an end of the connecting portion (119). The protrusion (110p) may be formed at at least one of both ends of the connecting portion (119) and may protrude in a direction perpendicular to the direction in which the connecting portion (119) extends. The protrusion (110p) may be caught on a step region formed on one side of a lower frame to be described later, thereby preventing the battery cell (110) from moving due to external impact. In particular, the battery cell (110) is a pouch-type battery cell, and the thickness of the battery body (113) may be formed to be greater than the thickness of the protrusion (110p).

[0058] The battery cell (110) is composed of a plurality of cells, and the plurality of battery cells (110) can be stacked so as to be electrically connected to each other to form a battery cell stack (120). In particular, as illustrated in FIG. 4, the plurality of battery cells (110) can be stacked along a direction parallel to the y-axis while standing upright so that one side of the battery body (113, see FIG. 2) faces each other. Accordingly, the electrode leads (111) can protrude in a direction perpendicular to the direction in which the battery cells (110) are stacked. For example, in the battery cell (110), one electrode lead (111) can protrude toward the x-axis direction, and the other electrode lead (111) can protrude toward the -x-axis direction.

[0059] A battery module (100) according to the present embodiment may include a module frame (200) that accommodates a battery cell stack (120) and an end plate (150) that covers the front and back surfaces of the battery cell stack (120). In addition, the battery module (100) may further include a bus bar frame (130) positioned between the end plate (150) and the battery cell stack (120).

[0060] For example, the module frame (200) may include a U-shaped frame (300) with an open top, front, and back, and an upper plate (400) covering the upper portion of the battery cell stack (120). However, the module frame (200) is not limited thereto, and may be replaced with a frame of another shape, such as an L-shaped frame or a mono-frame that surrounds the battery cell stack (120) except for the front and back.

[0061] The busbar frame (130) may be equipped with a busbar that electrically connects the electrode leads of the battery cell stacks (120) to electrically connect the battery cell stacks (120) that are stacked in parallel.

[0062] FIG. 5 is a partial perspective view of a battery module (100) and a battery pack according to one embodiment of the present invention.

[0063] Referring to FIG. 5, a battery pack according to one embodiment of the present invention includes a battery module (100) including a battery cell stack (120) in which a plurality of battery cells (110) are stacked, a module frame (200) in which the battery cell stack (120) is accommodated, and a pack frame (500) in which the battery module (100) is accommodated.

[0064] Fig. 6 is a cross-sectional view showing a cross-section taken along the cutting line B-B' of Fig. 5.

[0065] Referring to FIGS. 5 and 6, a cooling channel (530) through which refrigerant flows is formed in the bottom portion (510) of the pack frame (500). An opening (540) is formed in the bottom portion (510) of the pack frame (500). The opening (540) is a region formed on the upper side of the cooling channel (530) and can connect the space between the cooling channel (530) and the bottom portion (510) of the pack frame (500).

[0066] More specifically, a cooling passage (530), which is a space through which a refrigerant flows, may be formed inside the bottom portion (510) of the pack frame (500). Although not specifically illustrated, this cooling passage (530) may be connected to an inlet port and an outlet port provided in the pack frame (500). That is, the refrigerant introduced through the inlet port may circulate along the cooling passage (530), which is an internal space of the bottom portion (510) of the pack frame (500), and may ultimately be discharged through the outlet port. The battery pack according to the present embodiment may have a water-cooling structure that cools the battery module through a refrigerant circulation structure.

[0067] Among the cooling channels (530), an opening (540) may be formed on the upper side of an area corresponding to a portion where the battery module (100) is located. By positioning the module frame (200) of the battery module (100) on the opening (540), the lower portion of the module frame (200) and the coolant are in direct contact. This allows for improved cooling performance for the battery module according to the present embodiment compared to a conventional battery pack structure in which the bottom portion (510) of the pack frame (500) exists between the module frame (200) and the coolant.

[0068] FIG. 7 is a cross-sectional view of a battery module and a battery pack according to another embodiment of the present invention. In particular, FIG. 7, similar to FIG. 6, shows a cross-sectional view of a battery module (100) placed on an opening (540) of a pack frame (500).

[0069] Figure 8 is a perspective view showing the battery module (100) of Figure 4 in an assembled state at different angles so that its lower part is visible.

[0070] Referring to FIGS. 6 to 8, at least one protrusion (160) may be formed to protrude from the outer surface of the lower portion of the module frame (200). The protrusion (160) may protrude perpendicularly to the outer surface of the lower portion of the module frame (200). One end of the protrusion (160) may be in contact with the lower end of the cooling channel (530) or may be spaced apart from the lower end of the cooling channel (530). FIG. 6 illustrates an embodiment in which one end of the protrusion (160) is spaced apart from the lower end of the cooling channel (530). FIG. 7 illustrates an embodiment in which one end of the protrusion (160) is in contact with the lower end of the cooling channel (530).

[0071] The protrusion (160) may extend along one direction of the battery module (100) to guide the flow of the coolant in one direction. For example, the protrusion (160) may extend in a direction parallel to the outer surface of the lower portion of the module frame (200) and perpendicular to the stacking direction of the battery cells (110). Accordingly, the flow rate of the coolant flowing in each battery cell (110) may be similarly controlled to uniformly cool a plurality of battery cells (110) within the battery module (100).

[0072] One end of the protrusion (160) may be spaced apart from the bottom of the cooling channel (530). This provides a space for the coolant to flow smoothly within the cooling channel (530). Since the protrusion (160) does not directly contact the bottom of the cooling channel (530), the coolant can flow freely around the protrusion (160), thereby improving cooling performance. This allows each battery cell (110) within the battery module (100) to be cooled evenly, and reduces temperature deviation, thereby improving the efficiency and stability of the battery pack. In addition, the contact area between the protrusion (160) and the coolant can be effectively controlled to effectively control the temperature of the battery cells (110) within the battery module (100). In other words, the phenomenon of the coolant being concentrated in a specific portion can be prevented. This allows heat exchange to occur evenly, and overheating or overcooling of a specific battery cell (110) can be prevented.

[0073] A plurality of protrusions (160) may be arranged at intervals corresponding to the thickness of the battery cells (110). As the protrusions (160) are arranged at intervals corresponding to the thickness of the battery cells (110), the temperature difference between the battery cells (110) within the battery module (100) is minimized, and the entire battery module (100) can be uniformly cooled. In addition, the flow path of the coolant can be optimized to minimize the flow resistance. Through this, the performance of the battery module (100) can be improved, and the lifespan of each battery cell (110) can be extended. However, the interval between the protrusions (160) can be appropriately adjusted in consideration of the number or size of the battery cells (110).

[0074] As another example, the protrusions (160) may extend in the same direction as the stacking direction of the battery cells (110) while being parallel to the outer surface of the lower portion of the module frame (200). In addition, by arranging these protrusions (160) at regular intervals, the path and flow rate of the coolant flowing through the cooling channel (530) can be controlled, thereby improving cooling performance.

[0075] The protrusion (160) according to one embodiment of the present invention may be formed integrally with the module frame (200) through an extrusion process. The protrusion (160) according to another embodiment of the present invention may be welded to the outer surface of the lower portion of the module frame (200).

[0076] By means of the protrusion (160), the surface area of ​​the lower part of the module frame (200) that comes into contact with the refrigerant is expanded, and the cooling performance of the battery module can be improved in proportion to the expanded surface area. In addition, the flow of the refrigerant can be improved by forming a refrigerant channel in the cooling passage (530) through the protrusion (160) protruding from the lower part of the module frame (200). The shape of the protrusion (160) is sufficient as long as it can expand the surface area that the refrigerant comes into contact with and improve the cooling performance or form a refrigerant channel. For example, the protrusion (160) may be a plate shape that protrudes vertically from the outer surface of the lower part of the module frame (200). In addition, the protrusion (160) is not limited in shape and shape, and is not limited in position and process.

[0077] Figure 9 is a partial perspective view showing a mounting method and gasket of a battery module included in a battery pack.

[0078] Referring to FIG. 9, a battery module (100) according to one embodiment of the present invention may include a mounting portion (250) in which a mounting hole (250a) is formed. A pack frame hole (520) may be formed in a portion of the bottom portion (510) of the pack frame (500) corresponding to the mounting hole (250a) of the battery module (100). The battery module (100) may be mounted and coupled to the bottom portion (510) of the pack frame (500). When the battery module (100) is stored in the pack frame (500), a mounting bolt (250b) may pass through the mounting hole (250a) and be fastened to the bottom portion (510) of the pack frame (500). For example, a screw thread may be formed on the inner wall of the pack frame hole (520), and the mounting bolt (250b) may be directly coupled to the pack frame hole (520).

[0079] As another embodiment, the pack frame hole (520) may be a hole penetrating the bottom portion (510) of the pack frame (500), and the battery module (100) may be fixed to the pack frame (500) in such a way that the mounting bolt (250b) passes through the pack frame hole (520) of the bottom portion (510) of the pack frame (500) and is fastened with a nut. Such a mounting connection may be made for each battery module (100).

[0080] In order to prevent the refrigerant flowing in the cooling channel (530) from leaking through the opening (540), a gasket (600) may be positioned between the lower portion of the module frame (200) and the bottom portion (510) of the pack frame (500). The gasket (600) may be formed of an elastic material. For example, the gasket (600) may be formed of rubber. Accordingly, when pressure is applied to the gasket (600), the shape of the gasket (600) changes, thereby preventing the refrigerant flowing in the cooling channel (530) from leaking. The gasket (600) may be positioned along the edge of the opening (540) of the pack frame (500).

[0081] The bottom portion (510) of the pack frame (500) may include a groove portion in which a gasket (600) is mounted. The groove portion may be cut to a certain depth along the shape of the opening portion (540). The gasket (600) may be fitted into the groove portion. The shape of the gasket (600) may correspond to the shape of the groove portion. The width of the gasket (600) may be smaller than the width of the groove portion, and the height of the gasket (600) may be larger than the height of the groove portion.

[0082] The gasket (600) may include visually identifiable ribs to prevent the groove from detaching during assembly or to prevent some areas of the gasket (600) from overlapping each other and to improve assembly. In addition, the gasket (600) may include protrusions that can be force-fitted so that some areas overlap the groove to improve fixing force when fitted with the groove.

[0083] A gasket (600) is positioned between the lower portion of the module frame (200) and the bottom portion (510) of the pack frame (500), and the battery module (100) can be mounted and coupled to the bottom portion (510) of the pack frame (500). In the case of the battery pack according to the present embodiment, when the battery module (100) is mounted and coupled to the bottom portion (510) of the pack frame (500) and the battery module (100) is fixed to the pack frame (500), the fixing force applied to the battery module (100) can be utilized as the pressure applied to the gasket (600). When the battery module (100) is mounted and coupled to the bottom portion (510) of the pack frame (500), not only can the battery module (100) be fixed to the pack frame (500), but also the sealing property can be improved to prevent the coolant from leaking from the cooling passage (530). That is, the mounting bond for the battery module (100) can be utilized as a means of preventing refrigerant leakage.

[0084] In this example, terms indicating directions such as front, back, left, right, up, and down are used, but these terms are only for convenience of explanation and may vary depending on the location of the target object or the location of the observer.

[0085] One or more battery modules according to the above-described embodiment can be mounted together with various control and protection systems such as a BMS (Battery Management System), a BDU (Battery Disconnect Unit), and a cooling system to form a battery pack.

[0086] The above battery module or battery pack can be applied to various devices. Specifically, it can be applied to transportation vehicles such as electric bicycles, electric vehicles, and hybrid vehicles, but is not limited thereto. It can also be applied to various devices that can use secondary batteries.

[0087] Although the 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 made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

[0088] Description of the symbol

[0089] 100: Battery module

[0090] 160: Protrusion

[0091] 200: Module Frame

[0092] 250: Mounting part

[0093] 500: Pack Frame

[0094] 510: Bottom

[0095] 530: Cooling Euro

[0096] 540: Opening

[0097] 600: Gasket

Claims

1. A battery module including a battery cell stack in which a plurality of battery cells are stacked and a module frame in which the battery cell stack is accommodated; and including a pack frame in which the battery module is stored; A cooling path through which refrigerant flows is formed at the bottom of the above pack frame, A battery pack in which an opening is formed in the bottom portion of the pack frame, so that the lower portion of the module frame and the refrigerant are in direct contact.

2. In paragraph 1, The above opening is a region formed on the upper side of the cooling channel, and is a battery pack that connects the space between the cooling channel and the bottom part of the pack frame.

3. In paragraph 1, A battery pack having at least one protrusion formed on the outer surface of the lower portion of the module frame.

4. In paragraph 3, The above protrusion is a battery pack having a plate shape that protrudes vertically from the outer surface of the lower part of the module frame.

5. In paragraph 4, A battery pack in which one end of the above protrusion is in contact with the lower end of the above cooling channel.

6. In paragraph 4, A battery pack in which one end of the above protrusion is spaced apart from the lower end of the above cooling channel.

7. In paragraph 4, A battery pack in which the protrusion extends along one direction of the battery module and guides the flow of the coolant along the one direction.

8. In paragraph 3, The above protrusion is a battery pack formed integrally with the module frame through an extrusion process.

9. In paragraph 3, The above protrusion is a battery pack welded to the outer surface of the lower part of the module frame.

10. In paragraph 1, A battery pack having a gasket positioned between the lower portion of the module frame and the bottom portion of the pack frame along the edge of the opening to prevent leakage of the refrigerant.

11. In paragraph 1, The above battery module is a battery pack that is mounted and connected to the bottom part of the pack frame.

12. In paragraph 11, The above battery module includes a mounting portion having a mounting hole formed therein, A battery pack in which a mounting bolt passes through the mounting hole and is fastened to the bottom of the pack frame, or a nut passes through the pack frame hole formed in the bottom of the pack frame and is fastened.

13. In paragraph 11, A battery pack having a gasket positioned between the lower portion of the module frame and the bottom portion of the pack frame along the edge of the opening to prevent leakage of the refrigerant.

14. A device including a battery pack according to paragraph 1.

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