Title of Invention: Battery module and battery pack including same
technical field
[One]
Cross-Citation with Related Application(s)
[2]
This application claims the benefit of priority based on Korean Patent Application No. 10-2019-0133054 on October 24, 2019 and Korean Patent Application No. 10-2020-0082995 on July 6, 2020, All content disclosed in the literature is incorporated as a part of this specification.
[3]
The present invention relates to a battery module and a battery pack including the same, and more particularly, to a battery module and battery pack having a novel structure for preventing battery cell swelling.
background
[4]
Secondary batteries, which are easy to apply according to product groups and have electrical characteristics such as high energy density, are universally applied to electric vehicles or hybrid vehicles driven by an electric drive source, as well as portable devices, and power storage devices. These secondary batteries are attracting attention as a new energy source for improving eco-friendliness and energy efficiency in that not only the primary advantage of being able to dramatically reduce the use of fossil fuels, but also the fact that no by-products are generated from the use of energy.
[5]
While one or two or three battery cells are used per device in small mobile devices, medium and large devices such as automobiles require high output and high capacity. Accordingly, a medium or large-sized battery module in which a plurality of battery cells are electrically connected is used.
[6]
Since it is desirable to manufacture the mid- to large-sized battery module as small as possible in size and weight, a prismatic battery, a pouch-type battery, etc. that can be stacked with a high degree of integration and have a small weight to capacity are mainly used as battery cells of the mid-to-large battery module. Meanwhile, in order to protect the battery cell stack from external impact, heat, or vibration, the battery module may include a frame member having front and rear surfaces open to accommodate the battery cell stack in an internal space.
[7]
1 is a perspective view showing a battery module having a conventional module frame.
[8]
Referring to FIG. 1 , the battery module includes a battery cell stack 12 formed by stacking a plurality of battery cells 11 , a mono frame 20 with front and rear surfaces open to cover the battery cell stack 12 , and An end plate 60 covering the front and rear surfaces of the mono frame 20 may be included. In order to form such a battery module, horizontal assembly is required so that the battery cell stack 12 is inserted into the open front or rear surface of the mono frame 20 along the X-axis direction as shown by the arrow shown in FIG. 1 . However, sufficient clearance must be secured between the battery cell stack 12 and the mono frame 20 so that the horizontal assembly can be stably performed. Here, the clearance refers to a gap generated by fitting or the like. If the free space is small, component damage may occur during the horizontal assembly process. Therefore, the height of the mono frame 20 should be designed to be large in consideration of the maximum height of the battery cell stacking material 12 and the assembly tolerance during the insertion process. Accordingly, space may be wasted unnecessarily thereby.
[9]
In addition to this, the thickness of the frame member needs to be increased in order to control the swelling of the battery cells, so there is a problem of poor space utilization.
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[10]
An object of the present invention is to provide a battery module and a battery pack having a novel structure for preventing battery cell swelling.
[11]
However, the problems to be solved by the embodiments of the present invention are not limited to the above-described problems and may be variously expanded within the scope of the technical idea included in the present invention.
means of solving the problem
[12]
A battery module according to an embodiment of the present invention includes a battery cell stack in which a plurality of battery cells are stacked, a module frame accommodating the battery cell stack and an open top, and the battery cell stack in an upper part of the module frame. an upper plate for covering, a bus bar frame connected to the battery cell stack, and end plates positioned on both sides of the battery cell stack, wherein the module frame is a stack of the battery cells included in the battery cell stack It has a structure that opens the battery cell stack along the direction, and the end plates at both open sides of the module frame cover the stacked surface of the battery cell stack.
[13]
The module frame may include a bottom portion and two side portions facing each other, and the bus bar frame may be positioned between the side portion and the battery cell stack.
[14]
The end plate may be positioned in a direction perpendicular to a direction in which an electrode lead of the battery cell protrudes.
[15]
The battery module may further include an insulating plate positioned between the bus bar frame and a side surface of the module frame.
[16]
A first engaging portion protruding downward may be formed on both sides of the upper plate.
[17]
The end plate may have a first stepped portion formed at an upper end thereof, and the first engaging portion may be caught on the first stepped portion.
[18]
At both sides of the bottom of the module frame, second locking portions protruding upward may be formed.
[19]
A second step portion may be formed at a lower end of the end plate, and the second locking portion may be caught on the second step portion.
[20]
The first step portion and the second step portion may form a groove structure in each of the upper end portion and the lower end portion of the end plate.
[21]
The end plate may have module mounting portions formed on both outer sides of the first stepped portion.
[22]
A first cutout may be formed in the upper plate to correspond to the module mounting portion, and an upper end of the module mounting portion may be opened by the first cutout.
[23]
A second cutout may be formed in a bottom portion of the module frame to correspond to the module mounting portion, and a lower end of the module mounting portion may be opened by the second cutout.
[24]
The battery module may further include a compression pad positioned between the end plate and the battery cell stack.
[25]
The battery module may further include an insulating cover positioned between the end plate and the battery cell stack.
[26]
A width in the Z-axis direction of the insulating cover is greater than a width in the Z-axis direction of the end plate, and a first step is formed between an upper end of the insulating cover in the Z-axis direction and an upper end of the end plate, The first engaging portion may be caught by the first stepped portion.
[27]
At both sides of the bottom of the module frame, second locking portions protruding upward may be formed.
[28]
A second step portion may be formed at a lower end portion of the insulating cover in the Z-axis direction and a lower end portion of the end plate, and the second locking portion may be caught on the second step portion.
[29]
The end plate may be formed of a metal material.
[30]
A battery pack according to another embodiment of the present invention includes the battery module described above.
Effects of the Invention
[31]
According to embodiments, by implementing a battery module having a novel structure, it is possible to effectively control the swelling of the battery cell and increase the space utilization rate.
Brief description of the drawing
[32]
1 is an exploded perspective view showing a battery module having a conventional module frame.
[33]
2 is an exploded perspective view illustrating a battery module according to an embodiment of the present invention.
[34]
3 is a perspective view showing a state in which the components of the battery module of FIG. 2 are combined.
[35]
4 is a perspective view illustrating one battery cell included in the battery cell stack of FIG. 2 .
[36]
5 is an exploded perspective view of the module frame, the upper plate, and the end plate viewed obliquely from the top in the battery module of FIG. 3 .
[37]
6 is an exploded perspective view of the battery module of FIG. 3 when the module frame and the upper plate are viewed obliquely from the bottom.
[38]
7 is a perspective view illustrating a coupling relationship between an upper plate and an end plate in the battery module of FIG. 3 .
[39]
8 is a perspective view illustrating a coupling relationship between a module frame and an end plate in the battery module of FIG. 3 .
[40]
9 is an exploded perspective view illustrating a battery module according to another embodiment of the present invention.
[41]
10 is a perspective view illustrating a coupling relationship between an upper plate and an end plate in the battery module of FIG. 9 .
[42]
11 is a perspective view illustrating a coupling relationship between a module frame and an end plate in the battery module of FIG. 9 .
Modes for carrying out the invention
[43]
Hereinafter, with reference to the accompanying drawings, various embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.
[44]
In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar elements throughout the specification.
[45]
In addition, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar. In order to clearly express various layers and regions in the drawings, the thicknesses are enlarged. And in the drawings, for convenience of explanation, the thickness of some layers and regions is exaggerated.
[46]
Also, when a part of a layer, film, region, plate, etc. is said to be “on” or “on” another part, it includes not only cases where it is “directly on” another part, but also cases where another part is in between. . Conversely, when we say that a part is "just above" another part, we mean that there is no other part in the middle. In addition, to be "on" or "on" the reference portion means to be located above or below the reference portion, and to necessarily mean to be located "on" or "on" in the direction opposite to the gravity not.
[47]
In addition, throughout the specification, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.
[48]
In addition, throughout the specification, when referring to "planar view", it means when the target part is viewed from above, and "cross-sectional view" means when viewed from the side when a cross-section of the target part is vertically cut.
[49]
2 is an exploded perspective view illustrating a battery module according to an embodiment of the present invention. 3 is a perspective view showing a state in which the components of the battery module of FIG. 2 are combined. 4 is a perspective view illustrating one battery cell included in the battery cell stack of FIG. 2 . 5 is an exploded perspective view of the module frame, the upper plate, and the end plate viewed obliquely from the top in the battery module of FIG. 3 . 6 is an exploded perspective view of the battery module of FIG. 3 when the module frame and the upper plate are viewed obliquely from the bottom.
[50]
2 and 3 , the battery module 100 according to the present embodiment includes a battery cell stack 120 formed by stacking a plurality of battery cells 110 , and a module in which the battery cell stack 120 is accommodated. It may include a frame 300 , an upper plate 400 covering the open upper portion of the module frame 300 , and an end plate 150 covering the front and rear surfaces of the module frame 300 . The end plate 150 may be formed of a metal material such as aluminum. The end plate 150 may include a front plate covering one side of the module frame 300 and a rear plate covering the other side of the module frame 300 .
[51]
The module frame 300 may be a U-shaped frame, and when the open sides of the U-shaped frame are referred to as a first side and a second side, respectively, the module frame 300 is disposed on the first side and the second side. Among the remaining outer surfaces except for the surface of the corresponding battery cell stack 120 , it has a bent plate-shaped structure so as to continuously cover the adjacent front, lower, and rear surfaces. The upper surface corresponding to the lower surface of the module frame 300 is open. In this embodiment, the module frame 300 has a structure in which the battery cell stack 120 is opened along the stacking direction of the battery cells 110 included in the battery cell stack 120 . In this case, the end plates 150 at both open sides of the module frame 300 cover the stacked surface of the battery cell stack 120 .
[52]
The battery module 100 according to the present embodiment further includes a bus bar frame 130 positioned between the side portion of the module frame 300 and the battery cell stack 120 , and the bus bar frame 130 and the module frame. An insulating plate 135 positioned between the side surfaces of the 300 may be further included. The insulating plate 135 has a function of allowing the electrode leads 111 and 112 and the bus bar 131 to be insulated from the module frame 300 . The insulating plate 135 may be formed of a plastic injection molding material.
[53]
2, 5 and 6 , the module frame 300 according to the present embodiment includes a bottom part 300a and two side parts 300b facing each other. In addition, in the battery module 100 according to the present embodiment, before the battery cell stack 120 is mounted on the bottom part 300a of the module frame 300 , the thermoelectric power is applied to the bottom part 300a of the module frame 300 . It further includes a thermally conductive resin layer 310 formed by applying a conductive resin and curing the thermally conductive resin.
[54]
The upper plate 400 according to the present embodiment includes first engaging portions 400h protruding downward from both sides thereof. Both sides of the upper plate 400 on which the first locking part 400h is formed correspond to both sides in the X-axis direction, which is the direction in which the battery cell stack 120 is stacked. The module frame 300 according to the present embodiment further includes second locking portions 300c respectively formed on the first side and the second side of the module frame 300 . The second locking part 300c may be formed to protrude upward from one end of the bottom part 300a of the module frame 300 . The first side and the second side of the module frame 300 correspond to both sides in the X-axis direction, which is the direction in which the battery cell stack 120 is stacked.
[55]
As shown in FIG. 6 , a first cutout AP1 is formed in the upper plate 400 according to the present embodiment. The first cutout AP1 may be formed adjacent to both ends of the first locking portion 400h and may be formed at four corners of the upper plate 400 . A second cutout AP2 is formed in the bottom portion 300a of the module frame 300 according to the present embodiment. The second cutouts AP2 are formed adjacent to both ends of the second locking portion 300c and may be formed at four corners of the bottom portion 300a of the module frame 300 .
[56]
The upper plate 400 has a single plate-shaped structure that covers the remaining upper surfaces except for the front, lower and rear surfaces covered by the module frame 300 . The module frame 300 and the upper plate 400 may form a structure surrounding the battery cell stack 120 by being joined by welding or the like in a state in which corresponding corner portions are in contact with each other. That is, the module frame 300 and the upper plate 400 may be formed with a coupling portion formed by a bonding method such as welding in the corner portion corresponding to each other.
[57]
The battery cell stack 120 includes a plurality of battery cells 110 stacked in one direction, and the plurality of battery cells 110 may be stacked in the X-axis direction as shown in FIG. 2 . The battery cell 110 is preferably a pouch-type battery cell. For example, referring to FIG. 4 , in the battery cell 110 according to the present embodiment, two electrode leads 111 and 112 face each other, so that one end 114a and the other end 114b of the battery body 113 are opposite to each other. ) has a structure protruding from each other. The battery cell 110 is to be manufactured by adhering both ends 114a and 114b of the case 114 and both side surfaces 114c connecting them in a state in which an electrode assembly (not shown) is accommodated in the battery case 114 . can In other words, the battery cell 110 according to the present embodiment has a total of three sealing parts 114sa, 114sb, 114sc, and the sealing parts 114sa, 114sb, 114sc are sealed by a method such as thermal fusion. , the other one side may be formed of a connection part 115 . Between both ends 114a and 114b of the battery case 114 is defined in the longitudinal direction of the battery cell 110 , and one side portion 114c and a connecting portion connecting both ends 114a and 114b of the battery case 114 . A space between 115 may be defined in the width direction of the battery cell 110 .
[58]
The connection part 115 is a region extending along one edge of the battery cell 110 , and a protrusion 110p of the battery cell 110 may be formed at an end of the connection part 115 . The protrusion 110p may be formed on at least one of both ends of the connection part 115 , and may protrude in a direction perpendicular to the direction in which the connection part 115 extends. The protrusion 110p may be positioned between one of the sealing parts 114sa and 114sb of both ends 114a and 114b of the battery case 114 and the connection part 115 .
[59]
The battery case 114 generally has a laminate structure of a resin layer/metal thin film layer/resin layer. For example, when the battery case surface is made of an O (oriented)-nylon layer, when stacking a plurality of battery cells to form a medium or large-sized battery module, it tends to slide easily due to an external impact. Therefore, in order to prevent this and maintain a stable laminated structure of the battery cells, an adhesive member such as an adhesive adhesive such as a double-sided tape or a chemical adhesive bonded by a chemical reaction during adhesion is attached to the surface of the battery case to form a battery cell laminate (120) can be formed. In this embodiment, the battery cell stack 120 is stacked in the X-axis direction, is accommodated in the module frame 300 in the Z-axis direction, heat is transferred by the thermal conductive resin layer 310, and a cooling member adjacent to the battery module Cooling may be carried out by As a comparative example to this, there is a case in which the battery cells are formed as cartridge-shaped parts, and the fixing between the battery cells is made by assembling the battery module frame. In this comparative example, there is little or no cooling action due to the presence of the cartridge-shaped part, or it may proceed in the direction of the surface of the battery cell, and the cooling is not well in the direction of the height of the battery module.
[60]
2 and 4 again, the end plate 150 may be positioned in a direction perpendicular to the direction in which the electrode leads 111 and 112 of the battery cell 110 protrude.
[61]
Hereinafter, a structure for preventing battery cell swelling in the battery module according to the present embodiment will be described in detail with reference to FIGS. 7 and 8 .
[62]
7 is a perspective view illustrating a coupling relationship between an upper plate and an end plate in the battery module of FIG. 3 . 8 is a perspective view illustrating a coupling relationship between a module frame and an end plate in the battery module of FIG. 3 .
[63]
2, 3 and 7 , a first step portion 160 is formed at the upper end of the end plate 150 included in the battery module according to the present embodiment. The first step portion 160 may be formed when the end plate 150 is processed and molded, and as shown in FIG. 7 , the upper end of the end plate 150 on which the first step portion 160 is formed is in the Z-axis direction. has a slightly protruding structure. In this case, the first engaging portion 400h of the upper plate 400 may be caught by the first stepped portion 160 . The upper plate 400 and the end plate 150 may be coupled to each other by welding in a state in which the first locking part 400h is caught on the first stepped part 160 .
[64]
The end plate 150 according to the present embodiment further includes module mounting portions 154 formed on both outer sides of the first stepped portion 160 . The module mounting unit 154 may be a structure used to configure the battery pack by combining the battery module according to the present embodiment with a pack frame (not shown). For example, a mounting member (not shown) may be inserted into the module mounting unit 154 to connect the pack frame (not shown) and the battery module. At this time, the module mounting part 154 may correspond to the first cut-out AP1 of the upper plate 400 described with reference to FIG. 6 , and the upper end of the module mounting part 154 is opened by the first cut-out AP1 . can be
[65]
2, 3 and 8 , a second step portion 170 is formed at the lower end of the end plate 150 . The second step 170 may be formed when the end plate 150 is processed and molded, and as shown in FIG. 8 , the lower end of the end plate 150 on which the second step 170 is formed is in the Z-axis direction . has a slightly protruding structure. At this time, the second locking part 300c of the bottom part 300a of the module frame 300 may be caught by the second step part 170 . The bottom part 300a of the module frame 300 and the end plate 150 may be coupled to each other by welding in a state in which the second locking part 300c is caught on the second stepped part 170 .
[66]
The module mounting part 154 may correspond to the second cut-out AP2 of the bottom part 300a of the module frame 300 described in FIG. 6 , and the module mounting part 154 is formed by the second cut-out AP2. The lower end may be open.
[67]
According to the battery module structure according to the present embodiment described above, the end plate 150 is formed along the X-axis direction in which the battery cell swelling occurs by rotating the module frame position by 90 degrees in the existing U-shaped frame module structure. . Thus, the end plate 150 can directly control the battery cell swelling. The end plate 150 and the upper plate 400 and the end plate 150 and the module frame 300 are fixed by the locking portions 400h and 300c and the stepped portions 160 and 170 structures, and the direction in which they are fixed is Since it coincides with the X-axis direction in which the battery cell swelling occurs, it is possible to effectively control the problem caused by the battery cell swelling. In addition, since it is not necessary to increase the thickness of the end plate 150 and the thickness of the bottom surface of the module frame for controlling the swelling of the battery cells, it is possible to increase the space utilization rate.
[68]
The first stepped portion 160 and the second stepped portion 170 described with reference to FIGS. 7 and 8 may form a groove in each of the upper and lower ends of the end plate 150 . Since the first and second locking portions 400h and 300c are fixed to the first and second step portions 160 and 170 of the end plate 150, the upper plate 400 and the module frame 300, the bottom portion 300a It is possible to prevent the end plate 150 from protruding from the outermost surface. In addition, the first and second step portions 160 and 170 may serve as guides when the end plate 150 is assembled with the upper plate 400 and the module frame 300 and the bottom portion 300a.
[69]
Referring back to FIG. 2 , the battery module 100 according to the present embodiment may further include a compression pad 119 positioned between the insulating cover 140 and the battery cell stack 120 . The compression pad 119 may be formed of an elastic member such as urethane foam, thereby further reducing the battery cell swelling problem. In addition, the compression pad 119 maintains insulation between the end plate 150 and the battery cell stack 120 .
[70]
Hereinafter, a modified embodiment of the present invention will be described with reference to FIGS. 9 to 11 .
[71]
9 is an exploded perspective view illustrating a battery module according to another embodiment of the present invention. 10 is a perspective view illustrating a coupling relationship between an upper plate and an end plate in the battery module of FIG. 9 . 11 is a perspective view illustrating a coupling relationship between a module frame and an end plate in the battery module of FIG. 9 .
[72]
9 and 10 , the battery module according to the present embodiment further includes an insulating cover 140 positioned between the end plate 150 and the battery cell stack 120 . The insulating cover 140 may be formed of a plastic injection molding material. As shown in FIG. 10 , the width in the Z-axis direction of the insulating cover 140 is greater than the width in the Z-axis direction of the end plate 150 . The insulating cover 140 extends above the top surface of the end plate 150 . At this time, a first step portion 160 is formed between the upper end of the insulating cover 140 in the Z-axis direction and the upper end of the end plate 150 , and the first step portion 160 is formed on the first step of the upper plate 400 . One locking part 400h may be caught. Specifically, the insulating cover 140 formed inside the end plate 150 is receded by the thickness of the end plate 150 , and the insulating cover 140 protruding from the top surface of the end plate 150 in the Z-axis direction; A step is formed by the top surface of the end plate 150 . The upper plate 400 and the end plate 150 may be coupled to each other by welding in a state in which the first locking part 400h is caught by the step.
[73]
9 and 11 , the insulating cover 140 extends below the lower end surface of the end plate 150 . At this time, a second step portion 170 is formed between the lower end of the insulating cover 140 in the Z-axis direction and the lower end of the end plate 150 , and the module frame 300 bottom portion is formed on the second stepped portion 170 . The second locking part 300c of the 300a may be caught. Specifically, the insulating cover 140 formed inside the end plate 150 is receded by the thickness of the end plate 150 , and the insulating cover 140 protrudes from the lower end surface of the end plate 150 in the Z-axis direction. A step is formed by the lower surface of the end plate 150 . In a state in which the second locking part 300c is caught by the step, the bottom part 300a of the module frame 300 and the end plate 150 may be coupled to each other by welding.
[74]
Meanwhile, one or more battery modules according to an embodiment of the present invention may be packaged in a pack case to form a battery pack.
[75]
The above-described battery module and battery pack including the same may be applied to various devices. Such a device may be applied to transportation means such as an electric bicycle, an electric vehicle, and a hybrid vehicle, but the present invention is not limited thereto and is applicable to various devices that can use a battery module and a battery pack including the same, and this It belongs to the scope of the invention.
[76]
Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the
[77]
Explanation of symbols
[78]
100: battery module
[79]
140: insulation cover
[80]
150: end plate
[81]
154: module mounting unit
[82]
160: first step part
[83]
170: second step part
[84]
300: module frame
[85]
400: upper plate
[86]
400h: first stopper
[87]
300c: second stopper
Claims
[Claim 1]
A battery cell stack in which a plurality of battery cells are stacked, a module frame accommodating the battery cell stack and an open top, an upper plate covering the battery cell stack on the module frame, and connection with the battery cell stack and end plates positioned on both sides of the battery cell stack, wherein the module frame opens the battery cell stack along the stacking direction of the battery cells included in the battery cell stack. A battery module having a structure, wherein the end plate covers the stacked surface of the battery cell stack on both open sides of the module frame .
[Claim 2]
The battery module of claim 1 , wherein the module frame includes a bottom part and two side parts facing each other, and the bus bar frame is positioned between the side part and the battery cell stack.
[Claim 3]
The battery module of claim 2 , wherein the end plate is positioned in a direction perpendicular to a direction in which an electrode lead of the battery cell protrudes .
[Claim 4]
The battery module of claim 2, further comprising an insulating plate positioned between the bus bar frame and a side surface of the module frame.
[Claim 5]
The battery module of claim 1 , wherein first engaging portions protruding downward are formed on both sides of the upper plate.
[Claim 6]
The battery module of claim 5 , wherein the end plate has a first step portion formed at an upper end thereof, and the first locking portion is hooked to the first step portion.
[Claim 7]
[Claim 7] The battery module of claim 6, wherein second locking parts protruding upward are formed on both sides of the bottom of the module frame.
[Claim 8]
The battery module of claim 7, wherein a second step portion is formed at a lower end of the end plate, and the second locking portion is hooked to the second step portion.
[Claim 9]
The battery module of claim 8 , wherein the first step portion and the second step portion form a groove in each of the upper end and the lower end of the end plate.
[Claim 10]
The battery module of claim 8 , wherein the end plate has module mounting portions formed on both outer sides of the first stepped portion.
[Claim 11]
The battery module of claim 10 , wherein a first cutout is formed in the upper plate to correspond to the module mounting portion, and an upper end of the module mounting portion is opened by the first cutout.
[Claim 12]
The battery module of claim 11 , wherein a second cutout is formed in a bottom portion of the module frame to correspond to the module mounting portion, and a lower end of the module mounting portion is opened by the second cutout.
[Claim 13]
The battery module of claim 6, further comprising a compression pad positioned between the end plate and the battery cell stack.
[Claim 14]
The battery module of claim 6, further comprising an insulating cover positioned between the end plate and the battery cell stack.
[Claim 15]
15. The method of claim 14, wherein the width in the Z-axis direction of the insulating cover is greater than the width in the Z-axis direction of the end plate, the first step difference between the upper end of the insulating cover in the Z-axis direction and the upper end of the end plate A battery module in which a portion is formed, and the first engaging portion is hung on the first stepped portion.
[Claim 16]
The battery module of claim 15 , wherein second locking parts protruding upward are formed on both sides of the bottom of the module frame.
[Claim 17]
The battery module of claim 16 , wherein a second step portion is formed at a lower end of the insulating cover in the Z-axis direction and a lower end of the end plate, and the second locking portion is hooked to the second step portion.
[Claim 18]
The battery module of claim 1 , wherein the end plate is formed of a metal material.
[Claim 19]
A battery pack comprising the battery module according to claim 1 .