Battery pack

Abstract

Provided according to exemplary embodiments is a battery pack. The battery pack comprises: a pack housing including a base plate and side walls; a battery cell assembly disposed in the pack housing; a lead assembly coupled to the pack housing and including a first plate and a second plate; and thermal interface material (TIM) layers in contact with the first plate and the battery cell assembly, wherein the first plate and the second plate define cooling channels.

Description

battery pack

[0001] The present invention relates to a battery pack. The present application claims the benefit of Korean application No. 10-2024-0162644, filed on November 15, 2024, which is incorporated herein by reference in its entirety.

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as energy sources for various wireless devices such as handsets, laptops, and cordless vacuum cleaners. Recently, as the manufacturing cost per unit capacity of secondary batteries has decreased dramatically due to improved energy density and economies of scale, and as the driving range of BEVs (battery electric vehicles) has increased to a level equivalent to that of fuel vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility.

[0003] In the current trend emphasizing secondary batteries for mobility, the primary direction of secondary battery technology development is to reduce production costs and enhance safety. Secondary batteries account for the largest share of a BEV's manufacturing cost. Therefore, the production cost of secondary batteries is the most critical factor in increasing the market share of BEVs compared to internal combustion engine vehicles. Cost reduction can be achieved through the reduction of raw materials, the decrease in the number of steps in the production process, and the shortening of cycle times. The safety of secondary batteries is critical as it is directly linked to the lives of mobility passengers. A key challenge for enhancing secondary battery safety is the provision of cooling solutions for battery packs.

[0004] The problem that the technical concept of the present invention aims to solve is to provide a battery pack with improved cooling efficiency.

[0005] According to exemplary embodiments of the present invention for solving the above-described problem, a battery pack is provided. The battery pack comprises: a pack housing including a base plate and a side wall; a battery cell assembly on the pack housing; a lead assembly coupled to the pack housing and including a first plate and a second plate; and a Thermal Interface Material (TIM) layer in contact with the first plate and the battery cell assembly, wherein the first plate and the second plate define cooling channels.

[0006] The first plate includes a plate portion having a flat shape and fins protruding from the plate portion toward the TIM.

[0007] The fins of the first plate and the second plate define the cooling channels.

[0008] The above pins are in contact with the TIM layer.

[0009] The above pins and the TIM layer define venting channels.

[0010] The above venting channels alternate with the above cooling channels.

[0011] Each of the above venting channels is parallel to each of the above cooling channels.

[0012] The battery cell assembly comprises a plurality of battery cells arranged in a first direction, and the venting channels overlap with the cooling channels in the first direction.

[0013] The battery cell assembly comprises a plurality of battery cells arranged in a first direction, and the venting channels overlap the cooling channels in a second direction perpendicular to the first direction.

[0014] The battery cell assembly comprises a plurality of battery cells arranged in a first direction, and the pins extend in the first direction.

[0015] The above pins are spaced apart from each other in a second direction perpendicular to the first direction.

[0016] The battery cell assembly comprises a plurality of battery cells arranged in a first direction, and the pins extend in a second direction perpendicular to the first direction.

[0017] The above pins are spaced apart from each other in the first direction.

[0018] A battery pack according to exemplary embodiments of the present invention includes cooling channels located at the upper and lower portions of a battery cell assembly, respectively, thereby improving the cooling efficiency of the battery pack. Furthermore, the upper cooling channels alternate with venting channels, so that gas discharged to the outside through the venting channels can be cooled, and accordingly, ignition outside the battery pack can be prevented.

[0019] The effects obtainable from the exemplary embodiments of the present invention are not limited to those mentioned above, and other unmentioned effects can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure belong from the following description. That is, unintended effects resulting from the implementation of the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0020] FIG. 1 is a cross-sectional view of a battery pack according to exemplary embodiments.

[0021] FIG. 2 is a cross-sectional view of a battery pack according to exemplary embodiments.

[0022] FIG. 3 is a cross-sectional view of a battery pack according to exemplary embodiments.

[0023] FIG. 4 is a cross-sectional view of a battery pack according to exemplary embodiments.

[0024] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe his invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention.

[0025] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0026] In addition, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted.

[0027] Since embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or schematically depicted for clearer explanation. Accordingly, the size or proportion of each component does not entirely reflect the actual size or proportion.

[0028]

[0029] (1st and 2nd embodiments)

[0030] FIG. 1 is a cross-sectional view of a battery pack (100) according to exemplary embodiments.

[0031] FIG. 2 is a cross-sectional view of a battery pack (100) according to exemplary embodiments.

[0032] Referring to FIGS. 1 and 2, the battery pack (100) may include a pack housing (110), a plurality of battery cell assemblies (120), first TIM (Thermal Interface Material) layers (131), second TIM layers (133), a cooling plate (140), and a lead assembly (150). The battery pack (100) is the final form of a battery system mounted on mobility devices, etc.

[0033] The pack housing (110) may provide a space for arranging a plurality of battery cell assemblies (120). The pack housing (110) may include a base plate (111), side walls (112, 113, 114, 115), a center beam (116), and cross beams (117).

[0034] Two directions substantially parallel to the mounting surface (111M) of the base plate (111) are defined as the X direction and the Y direction, and a direction substantially perpendicular to the mounting surface (111M) of the base plate (111) is defined as the Z direction. The X direction, the Y direction, and the Z direction may be substantially perpendicular to each other. Unless otherwise noted, the definitions of directions are the same for the drawings below. The mounting surface (111M) of the base plate (111) may face the battery cell assemblies (120).

[0035] Each of the base plate (111) and the side walls (112, 113, 114, 115) may have a flat shape. The side walls (112, 113, 114, 115) may be welded to the base plate (111), but are not limited thereto. For example, the side walls (112, 113, 114, 115) may be provided integrally with the base plate (111) by a casting process. Each of the side walls (112, 113) may be substantially perpendicular to the Y direction. Each of the side walls (114, 115) may be substantially perpendicular to the X direction.

[0036] The center beam (116) may be on the base plate (111). The center beam (116) may be fixed to the base plate (111) by bolting or welding. The center beam (116) may extend in the X direction. The center beam (116) may be surrounded by side walls (112, 113, 114, 115). The center beam (116) may be interposed between battery cell assemblies (120). The center beam (116) may isolate the battery cell assemblies (120) in the Y direction.

[0037] Each of the cross beams (117) may be on a base plate (111). Each of the cross beams (117) may be fixed to the base plate (111) by bolting or welding. Each of the cross beams (117) may extend in the Y direction. The cross beams (117) may be surrounded by side walls (112, 113, 114, 115). Battery cell assemblies (120) may be interposed between the cross beams (117). The cross beams (117) may isolate the battery cell assemblies (120) in the X direction.

[0038] Multiple battery cell assemblies (120) may be on a base plate (111) of a pack housing (110). The base plate (111) may support multiple battery cell assemblies (120). Side walls (112, 113, 114, 115) may horizontally surround the multiple battery cell assemblies (120).

[0039] Each of the plurality of battery cell assemblies (120) may include a plurality of battery cells (121), pads (122), a first integrated circuit assembly (123), and a second integrated circuit assembly (124).

[0040] A plurality of battery cells (121) may be arranged in the X direction. Each of the plurality of battery cells (121) may be a lithium-ion battery. Each of the plurality of battery cells (121) includes an electrode assembly, an electrolyte, and a case. Each of the plurality of battery cells (121) may be any one of a cylindrical battery cell, a prismatic battery cell, and a pouch-type battery cell. The case of a cylindrical battery cell may be a cylindrical metal can. The electrode assembly of a cylindrical battery cell is embedded in a cylindrical metal can. The case of a prismatic battery cell may be a prismatic metal case. The electrode assembly of a prismatic battery cell is embedded in a prismatic metal can. The case of a pouch-type battery cell may be a pouch sheet. The electrode assembly of a pouch-type battery cell is embedded in a pouch case comprising an aluminum laminate sheet.

[0041] The electrode assembly may include an anode, a cathode, and a separator interposed between the anode and the cathode. The electrode assembly may be either a jelly-roll type or a stack type. A jelly-roll type electrode assembly may include a wound structure of an anode, a cathode, and a separator interposed between them. A stack type electrode assembly may include a plurality of sequentially stacked anodes, a plurality of cathodes, and a plurality of separators interposed between them.

[0042] Multiple battery cells (121) may form multiple banks. Each of the multiple banks may include one or more battery cells (121). One or more battery cells (121) of each of the multiple banks may be connected in parallel with each other. Multiple banks may be connected in series with each other. The number of series-connected banks and the number of battery cells (121) included in the multiple banks may be determined according to the magnitude of the voltage and current to be output from each of the battery cell assemblies (120).

[0043] The first integrated circuit assembly (123) may include an insulating frame, an integrated circuit, busbars, and an insulating cover. The second integrated circuit assembly (124) may include an insulating frame, an integrated circuit, and an insulating cover. The second integrated circuit assembly (124) is generally similar to the first integrated circuit assembly (123), except that it does not include busbars.

[0044] The insulating frame may include an insulating material such as plastic. The insulating frame of the first integrated circuit assembly (123) may cover the front of a plurality of battery cells (121). The insulating frame may support the integrated circuit, bus bars, and sensing plates.

[0045] The bus bars may be short-circuited to the positive leads of one or more battery cells (121) of the first bank and to the negative leads of one or more battery cells (121) of the last bank. The bus bars may be welded to the positive leads of one or more battery cells (121) of the first bank and to the negative leads of one or more battery cells (121) of the last bank. The resulting voltage of a plurality of battery cells (121) may be output through the bus bars. The bus bars may be fixed to an insulating frame.

[0046] The integrated circuit can be mounted on an insulating frame. Positive leads and negative leads welded to each other can form nodes inside the battery cell assembly (120). The integrated circuit can be configured to measure the voltage of the nodes.

[0047] The insulating cover may include an insulating material such as plastic. The insulating cover may be fitted into an insulating frame. The insulating cover may cover an integrated circuit, and accordingly, the electrical elements of the first integrated circuit assembly (123) may be protected.

[0048]

[0049] The first TIM layers (131) may be located between the plurality of battery cell assemblies (120) and the base plate (111). The first TIM layers (131) may include a resin composition. The first TIM layers (131) may be provided by a thermal resin application process. The first TIM layers (131) may prevent the formation of an air layer between the base plate (111) and the battery cells (121), thereby promoting the cooling of the plurality of battery cell assemblies (120). The first TIM layers (131) may be in contact with the plurality of battery cells (121) of the plurality of battery cell assemblies (120) and the base plate (111).

[0050] The resin composition may be a room-temperature curable composition. That is, the curing reaction of the resin composition may begin and proceed at room temperature. The curing reaction of the resin composition may be accelerated at a temperature higher than room temperature. At a temperature higher than room temperature, the curing reaction rate of the resin composition may be faster than the curing reaction rate of the resin composition at room temperature. As a non-limiting example, the subject of the resin composition may be any one of silicone resin, polyol resin, epoxy resin, and acrylic resin.

[0051] In this example, multiple battery cell assemblies (120) are arranged in two rows and two columns. Accordingly, the multiple battery cell assemblies (120) can be said to be arranged in a 2 * 2 configuration. A person skilled in the art will be able to easily arrive at a battery pack comprising multiple battery cell assemblies (120) arranged in an M * N configuration based on what is described herein. Here, M and N are each any integer greater than or equal to 1.

[0052] The cooling plate (140) can be attached to the base plate (111). The cooling plate (140) can be fixed to the base plate (111) by methods such as bolting or welding. The cooling plate (140) may include a plate portion (140P) and pins (140F).

[0053] The plate portion (140P) may have a flat shape. Each of the pins (140F) may be connected to the plate portion (140P). Each of the pins (140F) may protrude from the plate portion (14OP). The plate portion (140P) may be in contact with the base plate (111). Each of the pins (140F) may be spaced apart from the base plate (111). Accordingly, the pins (140F) of the cooling plate (140) and the base plate (111) may define cooling channels (CH1).

[0054] The cooling channels (CH1) can provide a passage for the movement of a refrigerant, such as water, for example. Each of the cooling channels (CH1) can extend in the Y direction. The cooling channels (CH1) can be spaced apart from each other in the X direction.

[0055] According to exemplary embodiments, each of the fins (140F) may extend in the Y direction. According to exemplary embodiments, the fins (140F) may be spaced apart from each other in the X direction. According to exemplary embodiments, the fins (140F) may be arranged in the X direction, and accordingly, the cooling plate (140) may include a corrugated structure.

[0056] The lead assembly (150) can be coupled to the side walls (112, 113, 114, 115). The lead assembly (150) can be secured to the side walls (112, 113, 114, 115) by mechanical means such as bolts. The lead assembly (150) can cover elements placed inside the battery pack (100), such as battery cell assemblies (120) and electrical components. A gasket may be further provided between the lead assembly (150) and the side walls (112, 113, 114, 115). The gasket may provide liquid sealing to the battery pack (100).

[0057] According to exemplary embodiments, the lead assembly (150) may include a first plate (151) and a second plate (153). The first plate (151) may be fixed to the second plate (153) by a method such as welding, but is not limited thereto. The first plate (151) may be interposed between the battery cell assemblies (120) and the second plate (153). The first plate (151) may be interposed between the base plate (111) and the second plate (153). The first plate (151) may include a plate portion (151P) and pins (151F). The second plate (153) may have a flat shape.

[0058] The plate portion (151P) may have a flat shape. Each of the pins (151F) may be connected to the plate portion (151P). Each of the pins (151F) may protrude from the plate portion (14OP). Each of the pins (151F) may protrude toward the second TIM layers (133). The plate portion (151P) may be in contact with the second plate (153). Each of the pins (151F) may be spaced apart from the second plate (153). Accordingly, the pins (151F) of the first plate (151) and the second plate (153) may define cooling channels (CH2).

[0059] The cooling channels (CH2) can provide a passage for the movement of a refrigerant, such as water, for example. Each of the cooling channels (CH2) can extend in the Y direction. The cooling channels (CH2) can be spaced apart from each other in the X direction.

[0060] According to exemplary embodiments, each of the pins (151F) may extend in the Y direction. According to exemplary embodiments, the pins (151F) may be spaced apart from each other in the X direction. According to exemplary embodiments, the pins (151F) may be arranged in the X direction, and accordingly, the first plate (151) may include a corrugated structure.

[0061] The second TIM layers (133) may be on the battery cell assemblies (120). The second TIM layers (133) may be between the battery cell assemblies (120) and the lead assembly (150). The second TIM layers (133) may be in contact with a plurality of battery cells (121). The second TIM layers (133) may be in contact with the first plate (151).

[0062] The second TIM layers (133) can provide a path for relaying heat between the plurality of battery cells (121) and the first plate (151), and accordingly, the upper portion of the plurality of battery cells (121) can be cooled by a cooling fluid flowing through the cooling channels (CH2).

[0063] Each of the pins (151F) can come into contact with a corresponding one of the second TIM layers (133). The plate portion (151P) can be spaced apart from the second TIM layers (133). Accordingly, the first plate (151) and the second TIM layers (133) can define venting channels (VC).

[0064] Venting channels (VC) can provide a path for the discharge of high-temperature gas and flames generated from multiple battery cells (121) in a thermal runaway event. Each of the venting channels (VC) can extend in the Y direction. The venting channels (VC) can be spaced apart from each other in the X direction.

[0065] According to exemplary embodiments, the venting channels (VC) may alternate with the cooling channels (CH2). One of the cooling channels (CH2) may be located between two adjacent venting channels (VC). One of the venting channels (VC) may be located between two adjacent cooling channels (CH2). According to exemplary embodiments, the venting channels (VC) may be parallel to the cooling channels (CH2). According to exemplary embodiments, the venting channels (VC) may overlap with the cooling channels (CH2) in the X direction. According to exemplary embodiments, the cooling channels (CH2) alternate with the venting channels (VC), thereby lowering the temperature of the gas discharged to the outside through the venting channels (VC), and thus preventing ignition outside the battery pack (100).

[0066] According to exemplary embodiments, the lower portion of each of the plurality of battery cells (121) (i.e., the portion adjacent to the base plate (111) of each of the plurality of battery cells (121)) is cooled by a cooling fluid flowing through cooling channels (CH1), and the upper portion of each of the plurality of battery cells (121) (i.e., the portion adjacent to the lead assembly (150) of each of the plurality of battery cells (121)) is cooled by a cooling fluid flowing through cooling channels (CH2), thereby increasing the cooling efficiency of the battery pack (100).

[0067] The battery pack (100) may further include exhaust devices coupled to the side wall (115). The exhaust devices can delay heat propagation by exhausting high-temperature gas and flames inside the battery pack (100) in the event that a thermal runaway event occurs within the battery pack (100).

[0068] Here, thermal runaway of multiple battery cell assemblies (120) is a state in which a temperature change of multiple battery cell assemblies (120) further accelerates the temperature change, which is an uncontrollable positive feedback. Multiple battery cell assemblies (120) in a thermal runaway state exhibit a rapid temperature rise and emit a large amount of high-pressure gas and combustion residue.

[0069] The battery pack (100) may further include electronic components. The electronic components may include any electronic elements necessary to drive the battery pack. The electronic components may be placed on an electronic component mounting area (EMR).

[0070] Electrical components may include, for example, a Battery Management System (BMS). The BMS may be configured to perform monitoring, balancing, and control of the battery pack. Monitoring of the battery pack (100) may include measuring the voltage and current of specific nodes within a plurality of battery cell assemblies (120) and measuring the temperature of set locations within the battery pack (100). The battery pack (100) may include measuring instruments for measuring the voltage, current, and temperature described above.

[0071] Balancing of the battery pack (100) is an operation that reduces deviations between multiple battery cell assemblies (120). Control of the battery pack (100) includes preventing overcharging, over-discharging, and overcurrent. Through monitoring, balancing, and control, the battery pack (100) can operate under optimal conditions, and accordingly, the shortening of the lifespan of each of the multiple battery cell assemblies (120) can be prevented.

[0072] The electrical components may further include a cooling device, a Power Relay Assembly (PRA), and a safety plug. The cooling device may include a cooling fan. The cooling fan can prevent overheating of each of the multiple battery cell assemblies (120) by circulating air inside the battery pack (100). The PRA may be configured to supply or cut off power from the high-voltage battery to an external load (e.g., a vehicle motor). The PRA can protect the multiple battery cell assemblies (120) and the external load (e.g., a vehicle motor) by cutting off power supply to the external load (e.g., a vehicle motor) in situations where abnormal voltage occurs, such as a voltage surge.

[0073] The battery pack (100) may further include a plurality of exhaust devices. The plurality of exhaust devices may be installed in either the pack housing (110) or the lead assembly (150). The plurality of exhaust devices may provide a path for releasing high-temperature gas inside the battery pack (100) to the outside in the event that a thermal runaway event occurs in some of the battery cell assemblies (120). Accordingly, thermal propagation may be delayed, and the stability of the battery pack (100) may be enhanced.

[0074]

[0075] (3rd and 4th embodiments)

[0076] FIG. 3 is a cross-sectional view of a battery pack (100') according to exemplary embodiments.

[0077] FIG. 4 is a cross-sectional view of a battery pack (100') according to exemplary embodiments.

[0078] Referring to FIGS. 1 and 2, the battery pack (100') may include a pack housing (110), a plurality of battery cell assemblies (120), first TIM layers (131), second TIM layers (133), a cooling plate (140'), and a lead assembly (150'). The battery pack (100') is the final form of a battery system mounted on mobility, etc.

[0079] The pack housing (110), the plurality of battery cell assemblies (120), the first TIM layers (131), and the second TIM layers (133) are substantially the same as those described with reference to FIGS. 1 and FIGS. 2, so a redundant description thereof is omitted.

[0080] The cooling plate (140') can be attached to the base plate (111). The cooling plate (140') can be fixed to the base plate (111) by methods such as bolting or welding. The cooling plate (140') may include a plate portion (140P') and pins (140F').

[0081] The plate portion (140P') may have a flat shape. Each of the pins (140F') may be connected to the plate portion (140P'). Each of the pins (140F') may protrude from the plate portion (14OP'). The plate portion (140P') may be in contact with the base plate (111). Each of the pins (140F') may be spaced apart from the base plate (111). Accordingly, the pins (140F') of the cooling plate (140') and the base plate (111) may define cooling channels (CH1').

[0082] The cooling channels (CH1') can provide a passage for the movement of a refrigerant, such as water, for example. Each of the cooling channels (CH1') can extend in the X direction. The cooling channels (CH1') can be spaced apart from each other in the Y direction.

[0083] According to exemplary embodiments, each of the fins (140F') may extend in the X direction. According to exemplary embodiments, the fins (140F') may be spaced apart from each other in the Y direction. According to exemplary embodiments, the fins (140F') may be arranged in the Y direction, and accordingly, the cooling plate (140') may include a corrugated structure.

[0084] The lead assembly (150') may include a first plate (151') and a second plate (153). The second plate (153) is substantially the same as the second plate (153) of FIG. 2. The first plate (151') may be interposed between the base plate (111) and the second plate (153). The first plate (151') may include a plate portion (151P') and pins (151F').

[0085] The plate portion (151P') may have a flat shape. Each of the pins (151F') may be connected to the plate portion (151P'). Each of the pins (151F') may protrude from the plate portion (14OP). Each of the pins (151F') may protrude toward the second TIM layers (133). The plate portion (151P') may be in contact with the second plate (153). Each of the pins (151F') may be spaced apart from the second plate (153). Accordingly, the pins (151F') of the first plate (151') and the second plate (153) may define cooling channels (CH2').

[0086] The cooling channels (CH2') can provide a passage for the movement of a refrigerant, such as water, for example. Each of the cooling channels (CH2') can extend in the X direction. The cooling channels (CH2') can be spaced apart from each other in the Y direction.

[0087] According to exemplary embodiments, each of the pins (151F') may extend in the X direction. According to exemplary embodiments, the pins (151F') may be spaced apart from each other in the Y direction. According to exemplary embodiments, the pins (151F') may be arranged in the Y direction, and accordingly, the first plate (151') may include a corrugated structure.

[0088] The second TIM layers (133) may be located between the battery cell assemblies (120) and the lead assembly (150'). The second TIM layers (133) may be in contact with the pins (151F') of the first plate (151').

[0089] The second TIM layers (133) can provide a path for relaying heat between the plurality of battery cells (121) and the first plate (151'), and accordingly, the upper portion of the plurality of battery cells (121) can be cooled by a cooling fluid flowing through the cooling channels (CH2').

[0090] Each of the pins (151F') can come into contact with a corresponding one of the second TIM layers (133). The plate portion (151P) can be spaced apart from the second TIM layers (133). Accordingly, the first plate (151') and the second TIM layers (133) can define venting channels (VC').

[0091] Venting channels (VC') can provide a path for the discharge of high-temperature gas and flames generated from multiple battery cells (121) in a thermal runaway event. Each of the venting channels (VC') can extend in the X direction. The venting channels (VC') can be spaced apart from each other in the Y direction.

[0092] According to exemplary embodiments, the venting channels (VC') may alternate with the cooling channels (CH2'). One of the cooling channels (CH2') may be located between two adjacent venting channels (VC'). One of the venting channels (VC') may be located between two adjacent cooling channels (CH2'). According to exemplary embodiments, the venting channels (VC') may be parallel to the cooling channels (CH2'). According to exemplary embodiments, the venting channels (VC') may overlap with the cooling channels (CH2') in the Y direction.

[0093]

[0094] The present invention has been described in more detail above through drawings and embodiments. However, the configurations described in the drawings or embodiments described in this specification are merely one embodiment of the present invention and do not represent all technical concepts of the present invention; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

Claims

1. Pack housing including a base plate and side walls; Battery cell assembly on the above-mentioned pack housing; and A lead assembly coupled to the above-mentioned pack housing and comprising a first plate and a second plate; and A battery pack comprising a Thermal Interface Material (TIM) layer in contact with the first plate and the battery cell assembly, wherein the first plate and the second plate define cooling channels.

2. In Paragraph 1, A battery pack characterized in that the first plate comprises a plate portion having a flat shape and fins protruding from the plate portion toward the TIM.

3. In Paragraph 2, A battery pack characterized in that the fins of the first plate and the second plate define the cooling channels.

4. In Paragraph 2, A battery pack characterized by the above pins being in contact with the TIM layer.

5. In Paragraph 2, A battery pack characterized in that the pins and the TIM layer define venting channels.

6. In Paragraph 5, A battery pack characterized in that the above venting channels alternate with the above cooling channels.

7. In Paragraph 5, A battery pack characterized in that each of the above venting channels is parallel to each of the above cooling channels.

8. In Paragraph 5, The above battery cell assembly includes a plurality of battery cells arranged in a first direction, and A battery pack characterized in that the above venting channels overlap with the above cooling channels in the first direction.

9. In Paragraph 5, The above battery cell assembly includes a plurality of battery cells arranged in a first direction, and A battery pack characterized in that the above venting channels overlap the above cooling channels and a second direction perpendicular to the first direction.

10. In Paragraph 2, The above battery cell assembly includes a plurality of battery cells arranged in a first direction, and A battery pack characterized by the above pins extending in the above first direction.

11. In Paragraph 10, A battery pack characterized in that the pins are spaced apart from each other in a second direction perpendicular to the first direction.

12. In Paragraph 2, The above battery cell assembly includes a plurality of battery cells arranged in a first direction, and A battery pack characterized in that the above pins extend in a second direction perpendicular to the first direction.

13. In Paragraph 12, A battery pack characterized in that the pins are spaced apart from each other in the first direction.

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