Battery module and battery pack including same

Abstract

The invention relates to a battery module and a battery pack including the same. A battery module according to an embodiment of the present invention comprises: a battery cell stack in which a plurality of battery cells are stacked; a module frame configured to accommodate the stack of battery cells; an end plate configured to cover the battery cell stack exposed by the module frame; and a module coupling portion which is a protruding portion provided on a side surface of the module frame and a side surface of the end plate, in which the module coupling portion includes a hole penetrated by the coupling member.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2022-0183602 filed in the Korean Intellectual Property Office on December 23, 2022, Korean Patent Application No. 10-2022-0181906 filed in the Korean Intellectual Property Office on December 22, 2022, and Korean Patent Application No. 10-2023-0185439 filed in the Korean Intellectual Property Office on December 19, 2023, the entire contents of the foregoing Korean patent applications are incorporated herein by reference.

[0003] The present disclosure relates to a battery module and a battery pack including the same, and more particularly, to a battery module and a battery pack including the same that simplify assembly and reduce processing costs. Background Art

[0004] As technology develops and demand for mobile devices increases, demand for secondary batteries as energy sources is rapidly increasing. Therefore, in order to meet various demands, many studies on secondary batteries are being conducted.

[0005] Secondary batteries are easy to apply to products and have high electrical properties such as energy density. Therefore, secondary batteries are widely used in electric energy storage devices and electric vehicles or hybrid vehicles driven by electric drive sources and portable devices. Because secondary batteries achieve the main advantage of innovatively reducing the use of fossil fuels and do not produce by-products even if energy is used, secondary batteries are considered to be a new energy source that improves environmental protection characteristics and energy efficiency.

[0006] As currently commercialized secondary batteries, there are nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium secondary batteries, etc. Among these batteries, lithium secondary batteries hardly cause memory effects compared to nickel-based secondary batteries, so they can be charged and discharged freely. In addition, lithium secondary batteries have very low self-discharge rates and high energy density, so lithium secondary batteries have attracted attention.

[0007] Generally, lithium secondary batteries can be divided into cylindrical or angular secondary batteries in which an electrode assembly is embedded in a metal can and pouch-type secondary batteries in which an electrode assembly is embedded in a pouch configured of an aluminum laminate sheet, according to the shape of an external material.

[0008] Recently, secondary batteries need to be used as energy storage sources, and secondary battery structures with high capacity are needed, and therefore, there is an increased demand for battery packs having a medium or large module structure in which a plurality of battery modules are assembled and each has a plurality of secondary batteries connected in series or in parallel. Since a plurality of battery cells are connected in series or in parallel to form a battery cell stack, the capacity of the battery module is improved and the output is increased. In addition, a plurality of battery modules can be installed together with various types of control and protection systems such as a battery management system (BMS), a cooling system, etc., to form a battery pack.

[0009] However, since the battery pack has a structure in which a plurality of battery modules are combined, the weight of the battery pack may be heavy, and thus, there is a problem that the plurality of batteries are not suitable for loading into a mobile device such as a vehicle.

[0010] Figure 1 is a perspective view of a battery pack in the prior art.

[0011] Reference Figure 1 The battery pack 10 in the prior art includes a lower battery pack frame 11 on which a plurality of battery modules are mounted and an upper battery pack frame 12 located above the battery modules. In this case, the lower battery pack frame 11 and the upper battery pack frame 12 may be combined with each other by welding or the like, and the interior of the battery pack 10 is sealed.

[0012] As described above, since the battery pack 10 in the related art generally includes a lower battery pack frame 11 and an upper battery pack frame 12, the battery pack frame has always had problems such as reducing process costs and simplifying assembly processes. Therefore, it is necessary to develop a new battery pack structure that can solve the above problems. Summary of the invention

[0013] Technical issues

[0014] The present disclosure seeks to provide an improved battery module and a battery pack including the same, which are capable of reducing cost and processing time, simplifying an assembly process, and improving process efficiency.

[0015] However, the objects to be achieved by the embodiments of the present disclosure are not limited to the above objects, but can be variously extended without departing from the technical spirit of the present disclosure.

[0016] Technical Solution

[0017] A battery module according to an embodiment of the present disclosure includes: a battery cell stack in which a plurality of battery cells are stacked; a module frame configured to accommodate the battery cell stack; an end plate configured to cover the battery cell stack exposed by the module frame; and a module coupling portion, which is a protrusion disposed on a side surface of the module frame and a side surface of the end plate, wherein the module coupling portion includes a hole penetrated by a coupling member.

[0018] The module combination may include: a first module combination, which is located on a first side surface of the module frame; a second module combination, which is located on a second side surface, and the second side surface is a side surface of the module frame opposite to the first side surface; and a third module combination, which protrudes from the side end portion of the end plate.

[0019] The first module combining portion provided on one battery module may be located facing the second combining portion provided on the other battery module.

[0020] The first module combining portion and the second module combining portion may be located at different heights of the battery module and located on the same line in a height direction.

[0021] The first module combining part may include a first hole and a first opening part, the first opening part is a part formed by opening a part of the outer peripheral surface which is the edge of the first hole, the second module combining part may include a second hole and a second opening part, the second opening part is a part formed by opening a part of the outer peripheral surface which is the edge of the second hole, and the third module combining part may include a third hole which is at least two holes.

[0022] The first module combining portion and the second module combining portion may be C-shaped holes.

[0023] The first opening portion and the second opening portion may open in opposite directions.

[0024] The third holes may be located on the same line in a height direction of the battery module.

[0025] The third hole may include a 3-1st hole and a 3-2nd hole, the 3-1st hole may be disposed to correspond to the first hole, and the 3-2nd hole may be disposed to correspond to the second hole.

[0026] The coupling member may sequentially penetrate the 3-1st hole and the first hole, and sequentially penetrate the 3-2nd hole and the second hole.

[0027] The battery module may further include: a flange portion formed on a side surface of the module frame.

[0028] A battery pack according to another embodiment of the present disclosure includes: a plurality of battery modules; and a battery pack frame, the battery pack frame including a side battery pack frame configured to surround the plurality of battery modules, wherein a first battery module and a second battery module among the plurality of battery modules are adjacent to each other, and wherein the battery pack includes a coupling member configured to fixedly couple the first battery module, the second battery module and the battery pack frame.

[0029] The coupling member may be fixedly coupled with a battery pack coupling portion provided on the battery pack frame and a module coupling portion provided on the first battery module and the second battery module.

[0030] The battery pack combining portion may be at least two holes provided in the side battery pack frame, and the at least two holes may be a first battery pack combining portion and a second battery pack combining portion.

[0031] The first battery pack coupling portion and the second battery pack coupling portion may be located at a position corresponding to the module coupling portion and located on the same line in a height direction of the side battery pack frame.

[0032] The first battery pack coupling portion can be set at a position corresponding to the 3-1 hole, which is one of the holes of the second module coupling portion located on the second side surface of the module frame of the first battery module and the holes of the third module coupling portion located at the side end of the end plate of the second battery module.

[0033] The second battery pack coupling portion can be set at a position corresponding to the 3-2 hole, which is one of the holes of the first module coupling portion located on the first side surface of the module frame of the second battery module and the holes of the third module coupling portion located at the side end portion of the end plate of the second battery module.

[0034] The coupling member may sequentially penetrate the first battery pack coupling portion and the module coupling portion, and sequentially penetrate the second battery pack coupling portion and the module coupling portion.

[0035] The overall structure of the pack frame may have a shape exposing upper and lower portions of the plurality of battery modules.

[0036] The first battery module and the second battery module may further include a flange portion formed on a side surface of the module frame, and when the flange portion of the first battery module and the flange portion of the second battery module overlap with each other, the flange portion of the first battery module and the flange portion of the second battery module may be combined by a module fastening component.

[0037] The coupling member may have a length longer than a sum of lengths of the side pack frame and the module coupling portion.

[0038] Beneficial Effects

[0039] According to the embodiment, the battery module may be firmly combined with the battery pack, thereby improving the durability of the battery.

[0040] In addition, the structure of the battery pack may be designed in a manner different from that of the prior art, thereby reducing costs and processing costs, simplifying the assembly process of the battery pack, and improving process efficiency.

[0041] The effects of the present disclosure are not limited to the aforementioned effects, and other effects not mentioned above will be clearly understood by those skilled in the art from the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a perspective view of a battery pack of the prior art.

[0043] Figure 2 is a perspective view of a battery pack according to an embodiment of the present disclosure.

[0044] Figure 3 is a perspective view of a battery module of the present disclosure.

[0045] Figure 4 is a cross-sectional view showing a coupling portion of a battery module of the present disclosure.

[0046] Figure 5 is a perspective view showing a coupling portion of a battery module of the present disclosure.

[0047] Figure 6 is a perspective view showing a state in which a battery module of the present disclosure is combined with a battery pack.

[0048] Figure 7 is a cross-sectional view showing a state in which a battery module of the present disclosure is combined with a battery pack. DETAILED DESCRIPTION

[0049] Hereinafter, several exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the exemplary embodiments. The present disclosure can be implemented in various different ways and is not limited to the embodiments described herein.

[0050] In order to clearly describe the present disclosure, parts irrelevant to the description will be omitted, and the same or similar constituent elements will be denoted by the same reference numerals throughout the specification.

[0051] In addition, the size and thickness of each constituent element shown in the figure are arbitrarily shown for the convenience of description, but the present disclosure is not limited thereto. In order to clearly describe several layers and regions, their thicknesses are enlarged in the figure. In the figure, for the convenience of description, the thickness of some layers and regions is enlarged.

[0052] In addition, when a component such as a layer, film, region, or plate is described as being “above” or “on” another component, the component may be “directly” “on” the other component, and the component may also be on the other component with other components interposed therebetween. Conversely, when a component is described as being “directly” “above” another component, there are no components therebetween. In addition, when a component is described as being “above” or “on” a reference portion, the component may be “above” or “below” the reference portion, and such a configuration does not necessarily mean that the component is “above” or “on” the reference portion in a direction opposite to gravity.

[0053] Throughout the specification, unless explicitly described to the contrary, the word “comprises / comprising” and variations thereof will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0054] In addition, throughout the specification, the phrase "in a plan view" means a case where an object is viewed from above, and the phrase "in a cross-sectional view" means a case where a cross section made by vertically cutting the object is viewed from the side.

[0055] Figure 2 is a perspective view of a battery pack according to an embodiment of the present disclosure.

[0056] Reference Figure 2 , the battery pack 1000 of the present disclosure includes a side pack frame 1150 , a front frame 1160 , and a rear frame 1170 surrounding a plurality of battery modules 100 .

[0057] In this case, in the drawings, the front and rear sides may be defined in the y-axis direction and the -y-axis direction, the lateral sides may be defined in the x-axis direction and the -x-axis direction, and the height may be defined in the z-axis direction. Hereinafter, the present disclosure will be described based on this definition.

[0058] The battery module 100 may include a battery cell stack 120 in which a plurality of battery cells are stacked in a predetermined direction, and a module frame 200 configured to accommodate the battery cell stack 120 and protect the battery cell stack 120 and various types of electrical components connected to the battery cell stack 120 from external physical impact. The module frame 200 may have various structures. For example, the module frame 200 may include an upper cover 210 and a U-shaped frame 250. The battery cell stack 120 may be installed between the upper cover 210 and the U-shaped frame 250, and constitute the battery module 100. However, the module frame 200 is not limited thereto. The module frame 200 may be a single frame in the form of a metal plate made by integrating the upper and lower surfaces and two opposing side surfaces. In addition, the module frame 200 may be made of a high-rigidity material, and the high-rigidity material may include a fiber reinforced plastic (FRP) as a composite material. Using a module frame 200 having high rigidity, a battery cell having a high capacity and a high degree of expansion may be controlled. In addition, the module frame 200 can be used as a battery pack case, thereby minimizing the battery pack case structure and ensuring long-term reliability of sealing. In addition, since the upper portion of the module frame 200 is used as a battery pack cover, the upper case can be excluded from the battery pack.

[0059] In this case, the type of the battery cell is not particularly limited. The battery may be a soft pack type secondary battery or an angular secondary battery, and preferably, the battery may be a soft pack type secondary battery.

[0060] The plurality of battery modules 100 may be installed to be spaced apart from each other and arranged in a direction in which the plurality of battery modules 100 face each other. For example, the end plate 400 (eg, Figure 3 The end plates 400 may be disposed on a pair of battery modules 100 and disposed in a direction in which the end plates 400 face each other. The end plates 400 may be located on a first side (y-axis direction) and a second side (-y-axis direction) of the module frame 200 and cover the battery cell stack 120. The end plates may physically protect the battery cell stack 120 and other electrical components from external impacts.

[0061] The side battery pack frame 1150 may be disposed to face the end plates 400 of the battery module 100. Specifically, the side battery pack frame 1150 may be disposed to face the end plates 400 of the pair of battery modules 100 that do not face each other.

[0062] The front battery pack frame 1160 and the rear battery pack frame 1170 may be disposed to surround the remaining lateral sides of the battery module 100 except for a portion of the battery module 100 surrounded by the side battery pack frame 1150. Specifically, the front battery pack frame 1160 and the rear battery pack frame 1170 may be disposed to surround an area of ​​the battery module 100 where the end plate 400 is not disposed.

[0063] The side battery pack frame 1150 may have both opposite ends thereof adjoin the front battery pack frame 1160 and the rear battery pack frame 1170 .

[0064] The side battery pack frame 1150 , the front battery pack frame 1160 , and the rear battery pack frame 1170 may surround the plurality of battery modules 100 , and protect the battery modules 100 from external impacts.

[0065] Figure 3 is a perspective view of a battery module of the present disclosure.

[0066] Reference Figure 3 , the battery module of the present disclosure includes a module coupling part 300 provided on a module frame 200 and an end plate 400 .

[0067] The module coupling part 300 may be provided on the side surface of the module frame 200 and the side surface of the end plate 400 (in the x-axis direction and the -x-axis direction). The module coupling part 300 may be a protrusion provided on the side surface of the module frame 200 and the side surface of the end plate 400. The module coupling part 300 may be a protrusion provided on the side surface of the module frame 200 and the side surface of the end plate 400 through a coupling member. Figure 2 The module coupling part 300 may be disposed to face the side battery pack frame 1150 .

[0068] The module coupling part 300 may include a first module coupling part 310 and a second module coupling part 320 disposed on a side surface of the module frame 200 and a third module coupling part 330 disposed on a side surface of the end plate 400 .

[0069] The first module coupling part 310 may be located on the first side surface 251 of the module frame 200. The first module coupling part 310 may be a portion from which one area of ​​the first side surface 251 of the module frame 200 protrudes.

[0070] The first module combining part 310 may include a partially opened hole. The first module combining part 310 may include a first hole 311 and a first opening part 313 formed by opening a part of an outer peripheral surface (ie, an edge of the first hole 311).

[0071] The first opening portion 313 may be a portion formed by opening a portion of the outer circumferential surface of the first hole 311 toward the outside of the module frame 200. The first opening portion 313 may be a portion formed by opening a portion of the outer circumferential surface of the first hole 311 in a direction opposite to the first side surface 251. Therefore, the first module coupling portion 310 may be a C-shaped hole.

[0072] The second module combining part 320 may be located on the second side surface 252 of the module frame 200. The second side surface 252 may be one side surface of the module frame 200 opposite to the first side surface 251. The second module combining part 330 may be a portion where one area of ​​the second side surface 252 of the module frame 200 protrudes.

[0073] The second module combining part 320 may include a partially opened hole. The second module combining part 320 may include a second hole 321 and a second opening part 323 formed by opening a part of an outer peripheral surface (ie, an edge of the second hole 321).

[0074] The second opening portion 323 may be a portion formed by opening a portion of the outer circumferential surface of the second hole 321 toward the outside of the module frame 200. The second opening portion 323 may be a portion formed by opening a portion of the outer circumferential surface of the second hole 321 in a direction opposite to the second side surface 252. Therefore, the second module coupling portion 320 may be C-shaped.

[0075] The first hole 311 of the first module combining part 310 and the second hole 321 of the second module combining part 320 may be opened in opposite directions. That is, the first opening part 313 and the second opening part 323 may be opened in opposite directions.

[0076] Unlike the first module joint part 310 and the second module joint part 320 of the present disclosure, the module joint part of the prior art may be configured as a general hole. Specifically, the module joint part of the prior art may be a hole provided in an area protruding from one side surface of the battery module. In contrast, the module joint part 300, specifically, the first module joint part 310 and the second module joint part 320 of the present disclosure may include a first module opening part 313 and a second module opening part 323 formed by opening an area of ​​the outer peripheral surface of the first hole 311 and an area of ​​the outer peripheral surface of the second hole 321. That is, the first module joint part 310 and the second module joint part 320 may each be a C-shaped hole.

[0077] Therefore, compared with the module combining part of the related art, the first module combining part 310 and the second module combining part 320 of the present disclosure, each including a hole formed by opening one area of ​​its outer peripheral surface, can protrude a little toward the lateral side (x-axis direction) of the battery module 100 through the first module opening part 313 and the second module opening part 323. Therefore, compared with the related art, the distance between adjacent battery modules 100 can be reduced, and the energy density of the battery pack can be increased.

[0078] The third module combining portion 330 may be located at a side end portion of the end plate 400. The third module combining portion 330 may be located at a side end portion of the end plate 400 corresponding to the first side surface 251 where the first module combining portion 310 of the battery module 100 is located. The third module combining portion 330 may be located at a side end portion of the end plate 400 facing the second side surface 252 where the second module combining portion 320 of the battery module 100 is located.

[0079] The third module coupling part 330 may be a region protruding from a side end portion of the end plate 400. In this case, the third module coupling part 330 may protrude from the end plate 400 and be located on the same xz plane as the end plate 400. In addition, the side end portion of the end plate 400 is aligned on the same plane as the first side surface 251 of the module frame 200. In an assembled state, the side end portion of the end plate 400 may be an extended surface of the first side surface 251, and the third module coupling part 330 may have a shape protruding from the side end portion of the end plate 400.

[0080] The third module coupling part 330 may have a third hole 331. The third hole 331 may be provided as at least two third holes 331 and located on the same line in the height direction (x-axis direction) of the battery module 100.

[0081] In addition, it can be seen that the first hole 311 and the second hole 321 having a C-shape are formed as the width of the portion of the first module coupling part 310 and the second module coupling part 320 protruding from the module frame 200 decreases. It can be seen that the third hole 331 is formed as the width of the portion of the third module coupling part 330 protruding from the end plate 400 decreases.

[0082] In other words, it can be seen that the shape of the first module joint part 310 and the second module joint part 320 as the protrusion widens in the direction from the first hole 311 and the second hole 321 toward the module frame 200, and the shape of the third module joint part 330 as the protrusion widens in the direction from the third hole 331 toward the end plate 400.

[0083] Generally, the structure is formed as the outer periphery of the hole is widened compared to the case where the module coupling part 300 protrudes by the shape of the hole. Therefore, the rigidity of the module coupling part 300 can be increased, and the durability of the battery can be increased.

[0084] Meanwhile, in a state where the flange portions 200F formed on the side surfaces of the module frame 200 overlap each other, the adjacent battery modules 100 can be fastened to each other by the module fastening members 1001 (eg, Figure 6In this case, the flange portion 200F may be sequentially formed on the upper and lower sides of the side surface of the module frame 200. With this combined structure, the battery pack housing configuration may not be included, so that the number of battery pack housing components may be minimized. In particular, the module fastening member 1001 is combined with the overlapping portion of the flange portion 200F formed on the upper and lower sides of the side surface of the flange portion 200F, so that components such as rigid beams may not be included. In other words, on the overlapping portion of the flange portion 200F, the combined portion including the module fastening member 1001 may be used as a rigid beam in the battery pack structure. The module fastening member 1001 may be provided as a plurality of module fastening members 1001 spaced apart from each other in the length direction (y-axis direction) of the battery module 100.

[0085] Hereinafter, the structural connection relationship among the first module combining part 310 , the second module combining part 320 , and the third module combining part 330 will be described in more detail.

[0086] Figure 4 is a cross-sectional view showing a coupling portion of a battery module of the present disclosure. Figure 5 is a perspective view showing a coupling portion of a battery module of the present disclosure.

[0087] Reference Figure 4 and Figure 5 , in the case where adjacent battery modules 100 of the present disclosure are installed, the first module combining part 310 , the second module combining part 320 , and the third module combining part 330 may be disposed to overlap with each other.

[0088] Specifically, the first module combining part 310 and the third module combining part 330 may be located on the same line, and the second module combining part 320 and the third module combining part 330 may be located on the same line in the length direction (y-axis direction) of the battery module 100 .

[0089] In addition, refer to Figure 4 , when a plurality of battery modules 100 are mounted on the battery pack, the first module combining part 310 and the second module combining part 320 may be respectively located on adjacent battery modules 100. Specifically, when the first module combining part 310 is located on a first side surface of one battery module 100a, the second module combining part 320 may be located on a second side surface of a battery module 100b adjacent to the one battery module 100a.

[0090] That is, in a state where a plurality of battery modules 100 are mounted on the battery pack, the first module combining portion 310 and the second module combining portion 320 may be located on the same line in the height direction (z-axis direction) of the battery module 100. Specifically, in the height direction (z-axis direction) of the battery module 100, the first module combining portion 310 may be disposed at a position lower than the second module combining portion 320. Therefore, when a plurality of battery modules 100a and 100b are mounted and arranged, the first module combining portion 310 and the second module combining portion 320 may be disposed at different heights and overlap each other on a line parallel to the height direction (z-axis direction).

[0091] However, this position is illustrative and is not limited thereto. The second module coupling part 320 may be disposed at a position lower than the first module coupling part 310 .

[0092] The first module combining portion 310 and the second module combining portion 320 may be arranged to extend in the length direction (y-axis direction) of the battery module 100. Specifically, the first module opening portion 313 of the first module combining portion 310 and the second module opening portion 323 of the second module combining portion 320 may be arranged to extend in the length direction (y-axis direction) of the battery module 100.

[0093] In this case, the extent to which the first and second module combining parts 310 and 310 protrude from the battery module 100 may be connected to each other. Specifically, the extent to which the first and second module combining parts 310 and 310 protrude from the battery module 100 may be equal to each other.

[0094] The third module combining portion 330 may be disposed closer to the side battery pack frame 1150 (hereinafter referred to as “330”) than the first module combining portion 310 and the second module combining portion 320. Figure 6 Specifically, refer to Figure 5 , the third module combining part 330 may be disposed closer to the front surface or the rear surface of the battery module 100 than the first module combining part 310 and the second module combining part 320 .

[0095] The third holes 331 of the third module combining part 330 may correspond to the first module combining part 310 and the second module combining part 320 , respectively.

[0096] Specifically, the third module combining portion 330 may include a 3-1st hole 331a and a 3-2nd hole 331b. The 3-1st hole 331a and the 3-2nd hole 331b may be located on the same line in the height direction (z-axis direction) of the battery module 100. In this case, the 3-1st hole 331a may be located at a higher position than the 3-2nd hole 332b.

[0097] In this figure, the 3-1st hole 331a may correspond to the second module combining portion 320, and the 3-2nd hole 331b may correspond to the first module combining portion 310. More specifically, the 3-1st hole 331a may be located at the same position as the second module combining portion 320 in the height direction (z-axis direction) of the battery module 100, and the 3-2nd hole 331b may be located at the same position as the first module combining portion 310 in the height direction (z-axis direction) of the battery module 100.

[0098] In this case, the 3-1st hole 331a may be located at the same height as the second hole 321 of the second module combining part 320, and the 3-1st hole 331a and the second hole 321 may have the same size. The 3-2nd hole 331b may be located at the same height as the first hole 311 of the first module combining part 310, and the 3-2nd hole 331b and the first hole 311 may have the same size.

[0099] Figure 6 is a perspective view showing a state in which a battery module of the present disclosure is combined with a battery pack. Figure 7 is a cross-sectional view showing a state in which a battery module of the present disclosure is combined with a battery pack.

[0100] Reference Figure 6 and Figure 7 , the side battery pack frame 1150 may be fixedly coupled with the battery module 100 by the coupling member 410 .

[0101] The coupling member 410 may fixedly couple the side battery pack frame 1150, the battery module 100, and the adjacent battery module 100. The coupling member 410 may be fixedly coupled with the battery pack coupling part 1200 provided at the side battery pack frame 1150, and fixedly coupled with the module coupling part 300 provided at the battery module 100.

[0102] The battery pack combining part 1200 may be a hole provided in the side battery pack frame 1150. The battery pack combining part 1200 may be at least two holes provided in the side battery pack frame 1150.

[0103] The battery pack coupling portion 1200 may include a first battery pack coupling portion 1200a and a second battery pack coupling portion 1200b. The first battery pack coupling portion 1200a and the second battery pack coupling portion 1200b may be located on the same line in the height direction (z-axis direction) of the side battery pack frame 1150. In this case, the first battery pack coupling portion 1200a may be disposed at a higher position than the second battery pack coupling portion 1200b.

[0104] The battery pack combining part 1200 may be a hole provided at a position corresponding to the module combining part 300. The first battery pack combining part 1200a may be provided at a position corresponding to the second module combining part 320 and the third module combining part 330, and the second battery pack combining part 1200b may be provided at a position corresponding to the first module combining part 310 and the third module combining part 330. Specifically, the first battery pack combining part 1200a may be provided at a position corresponding to the second hole 321 of the second module combining part 320 and the 3-1 hole 331a of the third module combining part 330, and the second battery pack combining part 1200b may be provided at a position corresponding to the first hole 311 of the first module combining part 310 and the 3-2 hole 331b of the third module combining part 330.

[0105] The coupling member 410 that fixedly couples the battery pack coupling part 1200 with the module coupling part 300 may sequentially penetrate the battery pack coupling part 1200 and the module coupling part 300. Specifically, the coupling member 410 penetrates the battery pack coupling part 1200 of the side battery pack frame 1150 and penetrates the module coupling part 300 of the battery module 100, so that the side battery pack frame 1150 and the battery module 100 can be fixedly coupled.

[0106] The coupling member 410 may penetrate the first battery pack coupling part 1200a and the second battery pack coupling part 1200b of the side battery pack frame, respectively. One coupling member 410 may sequentially penetrate the first battery pack coupling part 1200a, the first hole 331a of the third module coupling part 330, and the second module coupling part 320. Another coupling member 410 may sequentially penetrate the second battery pack coupling part 1200b, the second hole 331b of the third module coupling part 330, and the first module coupling part 310.

[0107] For example, the coupling member 410 may be a screw. In this case, the length (y-axis direction) of the coupling member 410 may be long enough to penetrate the first module coupling portion 310 or the second module coupling portion 320. Specifically, the length (y-axis direction) of the coupling member 410 may be longer than the sum of the lengths (y-axis direction) of the side battery pack frame 1150, the first module coupling portion 310 or the second module coupling portion 320, and the third module coupling portion 330.

[0108] In the case where the coupling member 410 is a screw, the angle of the thread constituting the body of the coupling member 410 may be about 60 degrees. Therefore, in the case where the coupling member 410 is coupled to the module coupling part 300, a force of the thread angle may be applied in a radial direction in which the hole of the module coupling part 300 is enlarged. Therefore, the fixing force between the coupling member 410 and the battery module 100 may be increased.

[0109] In addition, since the coupling member 410 is fixedly coupled to the battery pack coupling part 1200 and at least two module coupling parts 300 , a fixing force between the battery pack and the battery module may be increased, and safety of the battery may be improved.

[0110] In addition, since the coupling member 410 is more firmly fixed to the side battery pack frame 1150 and the battery module 100, an upper battery pack frame for fixing the battery module 100 may not be additionally provided. In this case, as described above, the upper and lower portions of the module frame 200 may be made of a high-rigidity material, thereby constituting the upper and lower portions of the battery pack 1000. Therefore, the upper and lower portions of the module frame 200 made of a high-rigidity material may define the upper and lower covers of the battery pack frame 1100 without the need for additional upper and lower covers, and the side battery pack frame 1150 may be firmly coupled to the battery module 100 by the coupling member 410, so that the manufacturing cost of the battery may be reduced, the weight of the battery may be reduced, and the energy density of the battery may be increased.

[0111] The above-mentioned battery module and the battery pack disclosing the battery module can be applied to various devices. Examples of such devices may include transportation devices such as electric bicycles, electric vehicles, and hybrid vehicles, but the present disclosure is not limited thereto and may be applied to various devices that can use the battery module and the battery pack including the battery module. These configurations may also fall within the scope of the present disclosure.

[0112] Although preferred examples of the present disclosure have been described in detail above, the scope of rights of the present disclosure is not limited thereto, and many changes and modifications made by those skilled in the art using the basic concepts of the present disclosure defined in the appended claims will also fall within the scope of rights of the present disclosure.

[0113] <Description of Reference Numerals>

[0114] 100: Battery module

[0115] 200: Module Framework

[0116] 300: Module joint

[0117] 310: First module joint

[0118] 311: First module joint

[0119] 313: First module opening

[0120] 320: Second module joint

[0121] 321: Second hole

[0122] 323: Second module opening

[0123] 330: Third module joint

[0124] 331: The third hole

[0125] 331a: Hole 3-1

[0126] 331b: Hole 3-2

[0127] 400: End plate

[0128] 410: Combined components

[0129] 1000: Battery Pack

[0130] 1150: Side battery pack frame

[0131] 1200: Battery pack joint

[0132] 1200a: first battery pack connection portion

[0133] 1200b: Second battery pack connection portion

Claims

1. A battery module, comprising: A battery cell stack, wherein a plurality of battery cells are stacked; a module frame configured to accommodate the battery cell stack; an end plate configured to cover the battery cell stack exposed by the module frame; as well as a module joint portion, the module joint portion being a protrusion provided on the side surface of the module frame and the side surface of the end plate, Wherein, the module combining portion includes a hole penetrated by the combining component.

2. The battery module according to claim 1, wherein: The module combination portion comprises: a first module combining portion, the first module combining portion being located on a first side surface of the module frame; a second module combining portion, the second module combining portion being located on a second side surface, the second side surface being a side surface of the module frame opposite to the first side surface; and A third module combining portion protrudes from a side end portion of the end plate.

3. The battery module according to claim 2, wherein: The battery module is provided as a plurality of battery modules, and The first module combining portion provided on one battery module is located facing the second module combining portion provided on another battery module.

4. The battery module according to claim 3, wherein: The first module combining portion and the second module combining portion are located at different heights of the battery module and are located on the same line in a height direction.

5. The battery module according to claim 3, wherein: The first module combining portion is a C-shaped hole including a first hole and a first opening portion, wherein the first opening portion is formed by opening a portion of an outer peripheral surface as an edge of the first hole, The second module combining portion is a C-shaped hole including a second hole and a second opening portion, the second opening portion being a portion formed by opening a portion of an outer peripheral surface as an edge of the second hole, and The third module combining portion includes at least two third holes.

6. The battery module according to claim 5, wherein: The first opening portion and the second opening portion open in opposite directions.

7. The battery module according to claim 5, wherein: The third holes are located on the same line in a height direction of the battery module.

8. The battery module according to claim 5, wherein: The third hole includes hole 3-1 and hole 3-2, The 3-1st hole is arranged to correspond to the first hole, and the 3-2nd hole is arranged to correspond to the second hole.

9. The battery module according to claim 8, wherein: The coupling member sequentially passes through the 3-1 hole and the first hole, and sequentially passes through the 3-2 hole and the second hole.

10. The battery module according to claim 1, further comprising: A flange portion is formed on a side surface of the module frame.

11. A battery pack comprising: The plurality of battery modules according to claim 1; as well as a battery pack frame including a side battery pack frame configured to surround the plurality of battery modules, wherein a first battery module and a second battery module among the plurality of battery modules are adjacent to each other, and The battery pack includes a combining member configured to fixedly combine the first battery module, the second battery module, and the battery pack frame.

12. The battery pack according to claim 11, wherein: The coupling member is fixedly coupled to a battery pack coupling portion provided on the battery pack frame and module coupling portions provided on the first battery module and the second battery module.

13. The battery pack according to claim 12, wherein: The battery pack coupling portion is at least two holes provided in the side battery pack frame, and The at least two holes are a first battery pack combining portion and a second battery pack combining portion.

14. The battery pack according to claim 13, wherein: The first battery pack coupling portion and the second battery pack coupling portion are located at positions corresponding to the module coupling portion and are located on the same line in a height direction of the side battery pack frame.

15. The battery pack according to claim 13, wherein: The first battery pack coupling portion is arranged at a position corresponding to the 3-1 hole, and the 3-1 hole is one of the holes of the second module coupling portion located on the second side surface of the module frame of the first battery module and the holes of the third module coupling portion located at the side end portion of the end plate of the second battery module.

16. The battery pack according to claim 13, wherein: The second battery pack coupling portion is arranged at a position corresponding to the 3-2 hole, which is one of the holes of the first module coupling portion located on the first side surface of the module frame of the second battery module and the holes of the third module coupling portion located at the side end portion of the end plate of the second battery module.

17. The battery pack according to claim 13, wherein: The coupling member sequentially penetrates the first battery pack coupling portion and the module coupling portion, and sequentially penetrates the second battery pack coupling portion and the module coupling portion.

18. The battery pack according to claim 11, wherein: The overall structure of the pack frame has a shape exposing upper and lower portions of the plurality of battery modules.

19. The battery pack according to claim 11, wherein: The first battery module and the second battery module further include a flange portion formed on a side surface of the module frame, and Here, in a state where the flange portion of the first battery module and the flange portion of the second battery module overlap each other, the flange portion of the first battery module and the flange portion of the second battery module are coupled together by a module fastening member.

20. The battery pack according to claim 11, wherein: The length of the coupling member is longer than the sum of the lengths of the side battery pack frame and the module coupling portion.

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