Battery pack and device including the same

Abstract

The invention relates to a battery pack and a device including the same. The battery pack includes: a plurality of battery modules including a battery cell stack in which a plurality of battery cells are stacked, a module frame for accommodating the battery cell stack, and a cooling plate located below a bottom of the module frame; a pack frame for accommodating the plurality of battery modules; a first cooling plate and a second cooling plate formed below each of a first battery module and a second battery module, which are vertically stacked, among the plurality of battery modules; and a cooling duct connecting the first cooling plate and the second cooling plate and formed along one side portion of the first battery module.

Description

[0001] Divisional application

[0002] This application is a divisional application of Chinese Patent Application No. 202111204669.9. The filing date of Chinese Patent Application No. 202111204669.9 is October 15, 2021, and the invention is entitled "Battery Pack and Apparatus Including said Battery Pack". Technical Field

[0003] Cross-reference to related applications

[0004] This application claims the benefit of Korean Patent Application No. 10-2020-0134032, filed with the Korean Intellectual Property Office on October 16, 2020, the disclosure of which is incorporated herein by reference in its entirety.

[0005] This disclosure relates to a battery pack and an apparatus including the battery pack, and more particularly, to a battery pack having a simplified cooling structure and improved space utilization, and an apparatus including the battery pack. Background Technology

[0006] In modern society, with the widespread use of portable devices such as mobile phones, laptops, camcorders, and digital cameras, technological development in areas related to these mobile devices has become increasingly active. Furthermore, in an attempt to address problems such as air pollution caused by existing gasoline vehicles using fossil fuels, rechargeable / dischargeable secondary batteries are being used as a power source for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs). Therefore, the demand for the development of secondary batteries is increasing.

[0007] Currently commercially available rechargeable batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among these, lithium-ion batteries have attracted attention due to their advantages, such as exhibiting almost no memory effect compared to nickel-based batteries, allowing for free charging and discharging, very low self-discharge rate, and high energy density.

[0008] This type of lithium secondary battery primarily uses lithium oxide and carbonaceous materials as the positive and negative electrode active materials, respectively. The lithium secondary battery includes an electrode assembly and a battery casing that seals and contains the electrode assembly and an electrolyte solution. The electrode assembly contains a positive electrode plate and a negative electrode plate, respectively coated with the positive and negative electrode active materials, and a separator is placed between the positive and negative electrode plates.

[0009] Lithium-ion batteries can generally be classified into can-type batteries and pouch-type batteries based on the shape of their external materials. In can-type batteries, the electrode assembly is housed in a metal can, while in pouch-type batteries, the electrode assembly is housed in a pouch made of aluminum laminated sheet.

[0010] In the case of secondary batteries used in small devices, two or three individual battery cells are used. However, in the case of secondary batteries used in medium or large devices such as automobiles, battery modules with a large number of battery cells electrically connected are used. In such battery modules, a large number of battery cells are connected in series or parallel to form a cell stack, thereby improving capacity and output. In addition, one or more battery modules can be installed together with various control and protection systems such as battery management systems (BMS) and cooling systems to form a battery pack.

[0011] When the temperature of a secondary battery rises above a suitable level, its performance may deteriorate, and in the worst-case scenario, there is a risk of explosion or fire. Specifically, a large number of secondary batteries—that is, battery modules or packs containing individual cells—can accumulate the heat generated by the numerous cells in a confined space, causing the temperature to rise more rapidly and severely. In other words, battery modules and packs equipped with such modules can achieve high output, but it is difficult to remove the heat generated from the cells during charging and discharging. Without proper heat dissipation, cell degradation is accelerated, lifespan is shortened, and the likelihood of explosion or fire increases.

[0012] Furthermore, in the case of battery modules included in vehicle battery packs, they are frequently exposed to direct sunlight and may be subjected to high-temperature conditions, such as in summer or desert regions. Therefore, ensuring stable and effective cooling performance is crucial when constructing battery modules or battery packs.

[0013] Figure 1 This is a partial 3D view of a traditional battery pack. Figure 2 This shows the installation. Figure 1 A partial perspective view of the method for including battery modules in a battery pack.

[0014] refer to Figure 1 and Figure 2 A conventional battery pack may include multiple battery modules 10 and a battery pack frame 11 for housing the multiple battery modules. For ease of explanation, in Figure 1 The image shows only one battery module.

[0015] Conventional battery packs have refrigerant pipes for cooling the battery modules 10, and the refrigerant is supplied through a refrigerant pipe connector 13 connected to the refrigerant pipes. This refrigerant is typically cooling water, and a fluid indirect cooling structure is employed, in which the temperature is reduced by circulating this cooling water within the battery pack.

[0016] Meanwhile, when the battery module 10 is housed in the battery pack frame 11, mounting holes are provided at the four corners, and mounting bolts 12 can pass through the mounting holes to be fastened to the battery pack frame 11. This mounting connection can be made for each battery module 10.

[0017] In this case, cooling structures such as the coolant pipe connector 13 for cooling the battery module 10 and mounting structures such as the mounting bolts 12 for mounting the battery module 10 are independent structures, and there is a problem that for each structure, the number of components is large and complex.

[0018] Additionally, the following situation may occur: due to assembly defects or accidents during operation, refrigerant may leak from the refrigerant line or refrigerant line connector 13. Such leaked refrigerant may seep into the battery pack and cause a fire or explosion.

[0019] Therefore, there is a need to develop a battery pack that can improve cooling performance while minimizing damage caused by refrigerant leakage.

[0020] Furthermore, vehicle battery packs are typically formed in a single-layer structure by arranging multiple battery modules or battery module assemblies on the same plane, thereby maintaining structural stability. However, when battery packs with the aforementioned single-layer structure are installed in electric vehicles requiring high capacity and high output, thus necessitating additional capacity, there are many structural limitations in increasing capacity. Moreover, it is difficult to structurally expand the cooling system to accommodate the increased capacity.

[0021] Therefore, there is a great need for a technology that can fundamentally solve these problems. Summary of the Invention

[0022] Technical issues

[0023] The purpose of this disclosure is to provide a battery pack with a simplified cooling structure and improved space utilization, as well as an apparatus including the battery pack.

[0024] However, the technical problems to be solved by the embodiments of this disclosure are not limited to those described above, and can be extended in various ways within the scope of the technical ideas included in this disclosure.

[0025] Technical solution

[0026] According to one embodiment of this disclosure, a battery pack is provided, the battery pack comprising: a plurality of battery modules, the plurality of battery modules including a battery cell stack therein, a module frame for accommodating the battery cell stack, and a cooling plate located below the bottom of the module frame; a battery pack frame for accommodating the plurality of battery modules; a first cooling plate and a second cooling plate formed below each of the vertically stacked first and second battery modules in the plurality of battery modules; and a cooling conduit connecting the first cooling plate and the second cooling plate, and formed along one side of the first battery module.

[0027] At least one mounting component can be connected to at least one of the upper and lower ends of the cooling pipe.

[0028] A junction with mounting components can be formed at at least one end of the cooling pipe, either at the upper or lower end.

[0029] The cooling flow path through which the refrigerant flows can be formed in the central part of the cooling pipe.

[0030] The cooling flow path can extend along the direction in which the at least one mounting component is arranged.

[0031] The battery pack may further include a first module cover covering one side of a first battery module and a second module cover covering one side of a second battery module, wherein the first module cover includes a first protruding cover protruding from the first module cover to the lower end of a cooling pipe, and the second module cover includes a second protruding cover protruding from the second module cover to the upper end of a cooling pipe, and the cooling pipe is located between the first protruding cover and the second protruding cover.

[0032] The mounting component passes through the first protruding cover and is mounted on the tap joint, or passes through the second protruding cover and is mounted on the tap joint.

[0033] Multiple holes are formed in at least one of the upper and lower ends of the cooling pipe, and the refrigerant of the cooling pipe can flow through the holes into the first cooling plate and the second cooling plate.

[0034] The orifice can be connected to the cooling flow path.

[0035] Through holes are formed in the portions of the first and second protruding caps that correspond to the holes, and sealing members can be formed in the through holes.

[0036] The bottom of the module frame can form the upper plate of the cooling plate, and the bottom of the module frame can come into contact with the refrigerant.

[0037] The module frame includes a module frame protrusion formed by protruding the bottom of the module frame, and a through hole into which a sealing member is inserted can be formed in the module frame protrusion.

[0038] The cooling plate may include a cooling plate protrusion that extends from one side of the cooling plate into the portion of the module frame that protrudes.

[0039] According to another embodiment of this disclosure, an apparatus including the above-described battery pack is provided.

[0040] Beneficial effects

[0041] According to embodiments of this disclosure, the cooling structure and mounting structure can be integrated to the greatest extent possible to simplify the potentially complex mounting and cooling structures when at least two battery modules are stacked.

[0042] The cooling performance can be improved through the integrated structure of the modular frame and the cooling plate.

[0043] The effects of this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the description of the appended claims that there are other effects not described above. Attached Figure Description

[0044] Figure 1 This is a partial 3D view of a traditional battery pack; Figure 2 This shows the installation. Figure 1 A partial perspective view of the method for including battery modules in a battery pack; Figure 3 This is a perspective view showing the battery modules and battery pack frame included in a battery pack according to an embodiment of the present disclosure; Figure 4 This refers to the view along the y-axis, which represents different angles. Figure 3 A 3D view of the battery pack; Figure 5 It is along Figure 4 The cross-sectional view intercepted by the cutting line AA; Figure 6 It is along Figure 4 The cross-sectional view cut by the cutting line BB; Figure 7 yes Figure 3 A 3D view of the battery modules contained in the battery pack; Figure 8 yes Figure 7 An exploded perspective view of the battery module; and Figure 9 This is when viewed along the z-axis from the bottom to the top of the battery module. Figure 7 A 3D view of the battery module. Detailed Implementation

[0045] Various embodiments of this disclosure will be described in detail below with reference to the accompanying drawings, enabling those skilled in the art to readily implement them. This disclosure can be modified in various different ways and is not limited to the embodiments set forth herein.

[0046] Parts irrelevant to the description will be omitted in order to clearly describe this disclosure, and similar reference numerals will indicate similar elements throughout the specification.

[0047] Furthermore, the dimensions and thicknesses of each element are arbitrarily shown in the figures for ease of description, and this disclosure is not necessarily limited to what is shown in the figures. The thicknesses of layers, regions, etc., are exaggerated in the figures for clarity.

[0048] Additionally, it will be understood that when an element such as a layer, film, region, or plate is referred to as being "on" or "above" another element, the element can be directly on the other element, or there may be intervening elements. Conversely, when an element is referred to as being "directly" on another element, it means that there are no other intervening elements. Furthermore, the terms "on" or "above" mean being placed on or below a reference portion, but do not necessarily mean being placed on the upper end of the reference portion in the direction opposite to gravity.

[0049] Furthermore, throughout the specification, when a section is referred to as "including" a component, it means that the section may also include other components, without excluding other components, unless otherwise stated.

[0050] Furthermore, throughout the instruction manual, when referred to as a "plane," it means the view of the target portion from above, and when referred to as a "section," it means the view of the target portion from the side of a vertically cut section.

[0051] Figure 3 This is a perspective view showing the battery modules and battery pack frame included in a battery pack according to an embodiment of the present disclosure. Figure 4 This refers to the view along the y-axis, which represents different angles. Figure 3 A 3D view of the battery pack. Figure 5 It is along Figure 4 The cross-sectional view cut by the cutting line AA. Figure 6 It is along Figure 4 The cross-sectional view cut by the cutting line BB.

[0052] refer to Figure 3 and Figure 4According to embodiments of the present disclosure, a battery pack includes a plurality of battery modules 100 arranged vertically and horizontally, and a battery pack frame 1100 for accommodating the plurality of battery modules 100. Each battery module 100 may include a battery cell stack in which a plurality of battery cells are stacked, a module frame for accommodating the battery cell stack, and a cooling plate located below the bottom of the module frame.

[0053] refer to Figure 4 and Figure 5 A first cooling plate 300a and a second cooling plate 300b are formed below each of the vertically stacked first battery modules 100a and 100b in a plurality of battery modules 100. The battery pack according to an embodiment of the present disclosure includes a cooling conduit 1000 connecting the first cooling plate 300a and the second cooling plate 300b, and is formed along one side of the first battery module 100a.

[0054] At least one mounting member 500 is connected to at least one of the upper and lower ends of the cooling pipe 1000. A tap 505 on which the mounting member 500 is mounted is formed in at least one of the upper and lower ends of the cooling pipe 1000. The tap 505 may be a portion of a component constituting the cooling pipe that is cut to accommodate the mounting member 500.

[0055] A cooling flow path 1000F through which the refrigerant flows is formed in the central portion of the cooling pipe 1000. The cooling flow path 1000F extends along the direction in which the at least one mounting member 500 is arranged. The cooling flow path 1000F may have a structure in which the cooling flow path 1000F extends along... Figure 4 and Figure 5 The x-axis shown extends very long.

[0056] According to an embodiment of the present disclosure, a first mounting member 500a is mounted to a first tap 505a, which is formed at the lower end of the cooling pipe 1000 relative to the cooling channel 1000F, and a second mounting member 500b can be mounted to a second tap 505b, which is formed at the upper end of the cooling pipe 1000.

[0057] refer to Figures 3 to 5According to embodiments of the present disclosure, the battery pack may further include a first module cover 220a covering one side of a first battery module 100a and a second module cover 220b covering one side of a second battery module 100b. The first module cover 220a includes a first protruding cover 220p1 protruding from the first module cover 220a to the lower end of a cooling conduit 1000, and the second module cover 220b may include a second protruding cover 220p2 protruding from the second module cover 220b to the upper end of the cooling conduit 1000. In this case, the cooling conduit 1000 may be located between the first protruding cover 220p1 and the second protruding cover 220p2.

[0058] According to an embodiment of this disclosure, the mounting member 500 can pass through the first protruding cover 220p1 and be mounted on the tap 505, or it can pass through the second protruding cover 220p2 and be mounted on the tap 505. In this case, the module frame protrusion 500p and the cooling plate protrusion 300p overlap with the first protruding cover 220p1 and the second protruding cover 220p2, and the mounting member 500 can be inserted through holes passing through the module frame protrusion 500p, the cooling plate protrusion 300p, the first protruding cover 220p1, and the second protruding cover 220p2. The module frame protrusion 500p and the cooling plate protrusion 300p will be described below.

[0059] refer to Figure 4 and Figure 6 A plurality of orifices 505h are formed in at least one of the upper and lower ends of the cooling conduit 1000, and the refrigerant of the cooling conduit 1000 can flow through the orifices 505h to the first cooling plate 300a and the second cooling plate 300b. The orifices 505h can communicate with the cooling flow path 1000F. Through holes are formed in the portions of the first protruding cap 220p1 and the second protruding cap 220p2 corresponding to the orifices 505h, and a sealing member 600 can be formed in the through holes.

[0060] According to an embodiment of this disclosure, a first sealing member 600a is mounted on a first hole 505h1 formed at the lower end of the cooling pipe 1000 relative to the cooling flow path 1000F, and a second sealing member 600b can be mounted in a second hole 505h2 formed at the upper end of the cooling pipe 1000. The sealing member 600 can be a gasket.

[0061] The module frame protrusion 500p and the cooling plate protrusion 300p overlap with the first protruding cover 220p1 and the second protruding cover 220p2, and the sealing member 600 can be inserted through holes passing through the module frame protrusion 500p, the cooling plate protrusion 300p, the first protruding cover 220p1 and the second protruding cover 220p2.

[0062] As described above, according to embodiments of this disclosure, because the cooling structure and mounting structure are integrally formed via cooling pipes, the assemblability of the battery pack can be improved by simplifying assembly. Significant cost reduction is achieved by reducing manufacturing processes, and strength can be increased through the layered connection structure.

[0063] Figure 7 yes Figure 3 A 3D view of the battery modules contained in the battery pack. Figure 8 yes Figure 7 An exploded perspective view of the battery modules contained in the battery pack.

[0064] refer to Figure 3 , Figure 7 and Figure 8 According to an embodiment of this disclosure, the battery module 100 includes a battery cell stack 120 in which a plurality of battery cells 110 are stacked, and a module frame 200 for accommodating the battery cell stack 120. Additionally, the battery module 100 may include a cooling plate 300 located below the bottom 210a of the module frame 200, and refrigerant can be supplied to the cooling plate 300 through a through-hole 510h, and refrigerant can be discharged from the cooling plate 300.

[0065] The battery cell 110 can be a pouch-type battery cell. This pouch-type battery cell can be formed by housing an electrode assembly within a pouch of a laminated sheet comprising a resin layer and a metal layer, and then heat-sealing the outer periphery of the pouch. In this case, the battery cell 110 can be formed as a rectangular sheet structure.

[0066] The battery cell 110 can be configured as a plurality of cells, and the plurality of battery cells 110 are stacked to be electrically connected to each other, thereby forming a battery cell stack 120. Specifically, as Figure 8 As shown, multiple battery cells 110 can be stacked in a direction parallel to the x-axis.

[0067] The module frame 200 for accommodating the battery cell stack 120 may include an upper plate 220 and a frame member 210. The frame member 210 may be U-shaped. The frame member 210 may include a bottom 210a and two side surface portions 210b extending upward from both ends of the bottom 210a. The bottom 210a may cover the lower surface of the battery cell stack 120 (in the direction opposite to the z-axis), and the side surface portions 210b may cover the two side surfaces of the battery cell stack 120 (in the x-axis direction and its opposite direction).

[0068] The upper plate 220 can be formed as a single-plate structure, which covers the remaining upper surface (z-axis direction) excluding the lower surface and two side surfaces enclosed by the frame member 210. The upper plate 220 and the frame member 210 can be connected by welding or the like in a state where their corresponding corners are in contact with each other, thereby forming a structure that vertically and horizontally covers the battery cell stack 120. The battery cell stack 120 can be physically protected by the upper plate 220 and the frame member 210. For this purpose, the upper plate 220 and the frame member 210 can include a metallic material with a predetermined strength.

[0069] Furthermore, although not specifically shown, the modular frame 200 according to the modified embodiment of this disclosure can be a single frame in the form of a metal plate in which the upper surface, lower surface, and two side surfaces are integrated. That is, the modular frame is not a structure in which the frame member 210 and the upper plate 220 are connected to each other, but rather a structure in which the upper surface, lower surface, and two side surfaces are integrated by extrusion molding.

[0070] End plates 400 can be located on two corresponding open sides of the module frame 200 (in the y-axis direction and the opposite direction), thereby enabling the end plates 400 to be formed to cover the battery cell stack 120. The end plates 400 can physically protect the battery cell stack 120 and other electronic instruments from external impacts.

[0071] Meanwhile, although not specifically shown, a busbar frame on which busbars are mounted and an insulating cover for electrical insulation may be located between the battery cell stack 120 and the end plate 400.

[0072] According to this disclosure, the module frame 200 includes a module frame protrusion 500p, which is formed such that the bottom 210a of the module frame 200 extends and passes through the end plate 400. At this time, a plurality of through holes are formed in the module frame protrusion 500p, and referencing... Figures 4 to 6 The described mounting member 500 and sealing member 600 can be inserted into the plurality of through holes.

[0073] In the following text, reference will be made to Figure 8 and Figure 9 A detailed description of the cooling plate according to embodiments of the present disclosure.

[0074] Figure 9 This is when viewed along the z-axis from the bottom to the top of the battery module. Figure 7 A 3D view of the battery module.

[0075] refer to Figure 8 and Figure 9 The bottom 210a of the module frame 200 forms the upper plate of the cooling plate 300, and the recess 340 of the cooling plate 300 and the bottom 210a of the module frame 200 form a flow path for the refrigerant. Specifically, the cooling plate 300 may be formed at the lower part of the module frame 200, and the cooling plate 300 may include: a lower plate 310, which forms the skeleton of the cooling plate 300 and is directly connected to the bottom 210a of the module frame 200; and a recess 340, which is a path through which the refrigerant flows. Furthermore, the cooling plate 300 may include a cooling plate protrusion 300p, which protrudes from one side of the cooling plate 300 to the portion where the module frame protrusion 211 is located. The cooling plate protrusion 300p and the module frame protrusion 500p may be directly connected to each other by a method such as welding.

[0076] The recessed portion 340 of the cooling plate 300 corresponds to the portion of the lower plate 310 that is recessed on its lower side. The recessed portion 340 can be a U-shaped tube, wherein the cross-section cut perpendicular to the xz plane relative to the direction of the refrigerant flow path has a U-shape, and the bottom 210a can be located on the open upper side of the U-shaped tube. While the cooling plate 300 and the bottom 210a are in contact, the space between the recessed portion 340 and the bottom 210a forms the area through which the refrigerant flows, i.e., the refrigerant flow path. Thus, the bottom 210a of the module frame 200 can come into contact with the refrigerant.

[0077] The method of manufacturing the recess 340 of the cooling plate 300 is not particularly limited, but a U-shaped recess 340 with an open upper side can be formed by providing a structure in which the structure is formed to be recessed relative to the plate-shaped cooling plate 300. The recess 340 can be connected from one cooling plate protrusion 300p to another cooling plate protrusion. Meanwhile, although not shown, a thermally conductive resin layer comprising a thermally conductive resin can be located... Figure 7Between the bottom 210a of the module frame 200 and the battery cell stack 120. A thermally conductive resin layer can be formed by applying a thermally conductive resin to the bottom 210a and curing the applied thermally conductive resin.

[0078] The thermally conductive resin may include a thermally conductive adhesive material, and specifically, may include at least one of silicone resin, urethane, and acrylic materials. The thermally conductive resin is liquid during application but is cured after application, allowing it to fix one or more battery cells 110 constituting the battery cell stack 120. Furthermore, because the thermally conductive resin has excellent heat transfer properties, heat generated from the battery cells 110 can be rapidly transferred to the underside of the battery module.

[0079] Conventional battery modules are constructed such that heat generated from individual battery cells sequentially passes through a thermally conductive resin layer, the bottom of the module frame, a heat transfer member, and the refrigerant in the cooling plate before being transferred to the outside of the battery module. Furthermore, the refrigerant flow path of the cooling plate is located inside the cooling plate. On the other hand, the battery module 100 according to an embodiment of this disclosure can achieve an integrated cooling structure of the module frame 200 and the cooling plate 300 to further improve cooling performance. The bottom 210a of the module frame 200 can function as an upper plate corresponding to the cooling plate 300, thereby achieving an integrated cooling structure. Due to direct cooling, cooling efficiency can be increased, and the integrated structure of the cooling plate 300 and the bottom 210a of the module frame 200 further improves the space utilization of the battery module and the battery pack equipped with the battery module 100.

[0080] Specifically, the heat generated from the battery cell 110 can be transferred to the outside of the battery module 100 via the thermally conductive resin layer (not shown) located between the battery cell stack 120 and the bottom 210a, the bottom 210a of the module frame 200, and the refrigerant. By eliminating unnecessary conventional cooling structures, the heat transfer path can be simplified, and the air gap between the corresponding layers can be reduced, thereby enhancing cooling efficiency or performance. In particular, because the bottom 210a is configured as the upper plate of the cooling plate 300 and is in contact with the refrigerant, it has the advantage of enabling more direct cooling through the refrigerant.

[0081] Furthermore, by eliminating unnecessary cooling structures, the height of the battery module 100 is reduced, thereby lowering costs and increasing space utilization. Moreover, because the battery modules 100 can be placed in a compact manner, the capacity or output of battery packs comprising multiple battery modules 100 can be increased.

[0082] Meanwhile, the bottom 210a of the module frame 200 can be welded to a portion of the lower plate 310 in the cooling plate 300 that does not have a recess 340. In the embodiments of this disclosure, the integrated cooling structure of the bottom 210a of the module frame 200 and the cooling plate 300 not only improves the aforementioned cooling performance but also supports the load of the battery cell stack 120 housed in the module frame 200 and enhances the strength of the battery module 100. Furthermore, the lower plate 310 and the bottom 210a of the module frame 200 are sealed by welding or the like, allowing refrigerant to flow without leakage in the recess 340 formed inside the lower plate 310.

[0083] For effective cooling, such as Figure 8 As shown, the recess 340 is preferably formed over the entire area corresponding to the bottom 210a of the module frame 200. For this purpose, the recess 340 can be bent at least once to connect from one side to the other. In particular, the recess 340 is preferably bent several times such that the recess 340 is formed over the entire area corresponding to the bottom 210a of the module frame 200. As the refrigerant moves from the starting point to the ending point of the refrigerant flow path formed over the entire area corresponding to the bottom 210a of the module frame 200, effective cooling can be achieved over the entire area of ​​the cell stack 120. Meanwhile, the refrigerant is the medium used for cooling and is not particularly limited, but the refrigerant can be cooling water.

[0084] The battery packs mentioned above and battery packs including such battery packs can be applied to various devices. Such devices can be applied to vehicle devices, such as electric bicycles, electric vehicles, or hybrid vehicles, but this disclosure is not limited thereto, and can be applied to various devices that can use battery modules, which are also within the scope of this disclosure.

[0085] Although the invention has been described with reference to preferred embodiments, the scope of this disclosure is not limited thereto, and those skilled in the art will be able to devise many other variations and embodiments that fall within the spirit and scope of the principles of the invention as defined in the appended claims.

[0086] List of reference numerals

[0087] 1000: Cooling pipe; 1000F: Cooling flow path

[0088] 300: Cooling plate; 500: Mounting components

[0089] 505: Tapered section; 505h: Hole section

[0090] 600: Sealing components 220a, 220b: First module cover and second module cover

[0091] 220p1, 200p2: First and second protruding caps

Claims

1. A battery pack, comprising: Multiple battery modules, the multiple battery modules comprising: a battery cell stack, in which multiple battery cells are stacked; a module frame for accommodating the battery cell stack; and a cooling plate located below the bottom of the module frame; A battery pack frame for accommodating the plurality of battery modules; A first cooling plate and a second cooling plate are formed below each of the vertically stacked first and second battery modules in the plurality of battery modules; and A cooling conduit connects the first cooling plate and the second cooling plate, and is formed along one side of the first battery module. The module frame includes a frame member, which includes two side surface portions extending upward from both ends of the bottom. The bottom covers the lower surface of the battery cell stack, and the side surface portions cover the two side surfaces of the battery cell stack.

2. The battery pack according to claim 1, wherein, At least one mounting component is connected to at least one of the upper and lower ends of the cooling pipe.

3. The battery pack according to claim 2, wherein, The branch portion on which the mounting member is installed is formed in at least one of the upper and lower ends of the cooling pipe.

4. The battery pack according to claim 3, wherein, The cooling flow path through which the refrigerant flows is formed in the central part of the cooling pipe.

5. The battery pack according to claim 4, wherein, The cooling flow path extends along the direction in which the at least one mounting component is arranged.

6. The battery pack according to claim 4, further comprising a first module cover covering one side of the first battery module and a second module cover covering one side of the second battery module. in, The first module cover includes a first protruding cover that protrudes from the first module cover to the lower end of the cooling pipe, and the second module cover includes a second protruding cover that protrudes from the second module cover to the upper end of the cooling pipe. The cooling pipe is located between the first protruding cover and the second protruding cover.

7. The battery pack according to claim 6, wherein, The mounting member passes through the first protruding cover and is mounted on the tap, or passes through the second protruding cover and is mounted on the tap.

8. The battery pack according to claim 6, wherein, Multiple holes are formed in at least one of the upper and lower ends of the cooling pipe, and the refrigerant of the cooling pipe flows through the holes into the first cooling plate and the second cooling plate.

9. The battery pack according to claim 8, wherein, The orifice is connected to the cooling flow path.

10. The battery pack according to claim 8, wherein, Through holes are formed in the portions of the first and second protruding caps that correspond to the holes, and a sealing member is formed in the through holes.

11. The battery pack according to claim 1, wherein, The bottom of the module frame forms the upper plate of the cooling plate, and the bottom of the module frame comes into contact with the refrigerant.

12. The battery pack according to claim 11, wherein, The module frame includes a module frame protrusion formed by protruding the bottom of the module frame. A through hole is formed in the protrusion of the module frame, and a sealing member is inserted into the through hole.

13. The battery pack according to claim 12, wherein, The cooling plate includes a cooling plate protrusion that protrudes from one side of the cooling plate to the portion of the module frame that protrudes.

14. An apparatus comprising a battery pack according to any one of claims 1-13.

Images