Specification
Title of Invention: Battery pack with connection plate, electronic device, and automobile
technical field
[One]
The present invention relates to a battery pack having a connection plate, and more particularly, to a battery pack having improved weldability between connection plates of a plurality of battery modules.
[2]
This application is a priority claim application for Korean Patent Application No. 10-2020-0002620 filed on January 08, 2020, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference.
background
[3]
Secondary batteries are highly applicable to various product groups and have electrical characteristics with high energy density. Such secondary batteries are being applied to electric vehicles or hybrid vehicles driven by an electric driving source as well as portable electronic devices, power storage devices, and the like.
[4]
Secondary batteries are attracting attention as a new energy source to improve eco-friendliness and energy efficiency in that they do not generate any by-products from the use of energy as well as the primary advantage of dramatically reducing the use of fossil fuels.
[5]
A battery pack applied to an electric vehicle has a structure in which a plurality of battery modules including a plurality of battery cells serving as secondary batteries are connected to obtain high output. In addition, as an electrode assembly, each battery cell can be repeatedly charged and discharged by an electrochemical reaction between components, including positive and negative current collectors, separators, active materials, electrolytes, and the like.
[6]
Recently, as the need for a large-capacity structure, including use as an energy storage source, increases, the demand for a battery pack having a multi-module structure in which a plurality of battery modules are connected in series and/or in parallel is increasing. In this case, the battery pack could be configured by closely arranging a plurality of battery modules in the front-rear direction so that many battery modules can be accommodated in a limited space.
[7]
And, the battery pack of the prior art includes a plurality of battery modules, and one battery module includes a plurality of battery cells and a housing made of an electrically insulating plastic material for accommodating them. In addition, the battery pack has a metal plate configured to electrically connect a plurality of battery cells to each other. In addition, in order to electrically connect the plurality of battery modules to each other, a plurality of metal plates were joined to each other by welding or the like.
[8]
However, in the process of welding a plurality of metal plates to each other, when the welding portion of the metal plate is in contact with the housing, the welding heat cannot escape from the portion in contact with the housing due to the low thermal conductivity of the housing, so that a hole is drilled in the welding portion (holes) occurred. For this reason, there is a problem in that welding defects of the metal plate occur frequently, and welding efficiency is greatly reduced.
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[9]
Accordingly, the present invention has been devised to solve the above problems, and an object of the present invention is to provide a battery pack having improved weldability between connection plates of a plurality of battery modules.
[10]
Other objects and advantages of the present invention may be understood by the following description, and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.
means of solving the problem
[11]
The battery pack according to the present invention for achieving the above object,
[12]
It includes a plurality of battery modules arranged in the front-rear direction,
[13]
Each of the plurality of battery modules,
[14]
a plurality of secondary batteries having electrode terminals formed on the upper and lower portions, respectively, and arranged in a horizontal direction;
[15]
a body portion provided with a plurality of connection terminals positioned on the upper or lower portions of the plurality of secondary batteries and electrically connected to electrode terminals formed on one of the plurality of secondary batteries in a portion thereof; and a left or right direction from the main body a connection plate having a connecting portion protrudingly extending, a portion of the projecting extension is bent upward or downward from the body portion, and the bent end portion is joined to a portion of the other connection plate; and
[16]
and a module housing in which a plurality of hollows are formed to insert and receive the secondary battery, and spaced apart grooves in which a part of the outer wall is inserted inwardly so as to be spaced apart from the bent end of the connection part by a predetermined distance is formed on the outer wall.
[17]
In addition, the module housing includes a protrusion for supporting at least a portion of the remaining portions except for the joined portion of the connecting portion in an outward direction so that the portion joined to the other connecting plate of the connecting portion is spaced apart from the outer wall by a predetermined distance. can be
[18]
Furthermore, the connecting portion has an overlapping portion in which the bent end is folded in the upper or lower direction,
[19]
The overlapping portion of the connecting portion may be joined to a portion of the other connecting plate.
[20]
In addition, an end of the overlapping portion of the connecting portion or an end of the overlapping portion and the other end of the connecting plate may be inserted into the protrusion to be fixed thereinto may be formed in the protrusion.
[21]
Furthermore, a concave-convex structure protruding in a left and right direction may be formed in the overlapping portion.
[22]
In addition, the module housing,
[23]
A conductive plate made of a metallic material and positioned to face a portion joined to the other connecting plate of the connecting portion may be provided with a conductive plate having at least a portion inserted and fixed to the outer wall.
[24]
Further, the connection plate includes a first connection plate and a second connection plate,
[25]
The first connection plate includes a first body portion positioned above the plurality of secondary batteries, and a first connection portion protruding from the first body portion and bent in a downward direction;
[26]
The second connection plate includes a second main body located under the plurality of secondary batteries, and a second connecting portion protruding from the second main body and bent in an upward direction,
[27]
The bent end of the first connection part of the first connection plate is joined to the second connection part of the second connection plate provided in another battery module,
[28]
Any one or more of the first connection part and the second connection part may have an extension structure that protrudes more forward than the frontmost distal end of the module housing, or protrudes further rearward than the rearmost distal end of the module housing.
[29]
In addition, the first connection plate,
[30]
A portion of the first connection portion is positioned to overlap the outside of the second connection portion of the second connection plate,
[31]
A conductive portion extending from the first connection portion and bent to surround a portion of an inner surface of the second connection portion of the second connection plate may be provided.
[32]
Moreover, a portion of the first connection portion is positioned to overlap the outside of the second connection portion of the second connection plate,
[33]
The second connection plate may include a cover part extending from the second connection part and bent to surround a portion of an outer surface of the first connection part of the first connection plate.
[34]
And, the electronic device according to the present invention for achieving the above object includes the battery pack.
[35]
Furthermore, the vehicle according to the present invention for achieving the above object includes the battery pack.
Effects of the Invention
[36]
According to one aspect of the present invention, the battery pack of the present invention is a module in the prior art by forming a spacer groove in which a part of the outer wall is inserted in the inner direction so as to be spaced apart from the bent end of the connector at a predetermined distance on the outer wall of the module housing. A part of the outer wall of the housing is in close contact (contact) with the connection plate, so that the welding heat is easily accumulated between the connection plate and the module housing during the welding process. It is possible to solve a problem in which welding defects are likely to occur, such as perforation occurring in a part.
[37]
That is, the spacing groove of the present invention can secure a predetermined space between the joint portion of the connection plate and the outer wall of the module housing, so that the welding heat generated during welding between the connection plates is not accumulated and can be effectively discharged to the outside.
[38]
Further, according to one aspect of the present invention, according to the present invention, any one or more connection portions of the first connection plate and the second connection plate protrude forward more than the frontmost distal end of the module housing, or extend further than the rearmost distal end of the module housing. By having an extended structure that protrudes backward, one connection plate can contact the other connection plate without a separate connection member. Accordingly, it is possible to reduce the manufacturing cost of the battery pack and simplify the manufacturing process.
[39]
Furthermore, according to one aspect of the present invention, the module housing of the present invention has at least a portion of the remaining parts except for the joined portion of the connecting portion so that the portion joined to the other connecting plate of the connecting portion is spaced apart from the outer wall by a predetermined distance. Since the protrusion for supporting in the direction is provided, the separation distance can be maintained so that the connection part of the connection plate does not come into close contact with (contact) the outer wall of the module housing during welding. Moreover, since the connection plate may not flow while seated on the step difference of the protrusion, welding may be performed stably, thereby improving weldability.
[40]
And, according to another aspect of the present invention, the connecting portion of the present invention has an overlapping portion by folding the bent end in the upper or lower direction, and the overlapping portion is joined to a portion of the other connecting plate, so that the connecting portion Since the welding heat is conducted through the overlapping part and can be discharged to the outside, in the prior art, the welding heat is accumulated between the connection plate and the module housing during the welding process, and the temperature distribution of the heating part is not even, so that the welding part is uniform. It is possible to solve problems that are prone to welding defects such as poor bonding or perforation occurring in a part. That is, according to the present invention, the overlapping portion of the connection portion can secure a predetermined space between the bonding portion of the connection plate and the outer wall of the module housing, so that the welding heat generated during welding between the connection plates is not accumulated and is effectively discharged to the outside can make.
[41]
Furthermore, according to another aspect of the present invention, in the connection plate of the present invention, a concave-convex structure protruding in the left and right directions is formed in the overlapping portion, so that the concave-convex structure formed in the overlapping portion is a space between the module housing and the connection plate. As compared to the case where the uneven structure is not formed, there is an advantage that the welding heat can be discharged more quickly. Accordingly, weldability may be further improved.
Brief description of the drawing
[42]
The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention to be described later, so the present invention is described in such drawings should not be construed as being limited only to
[43]
1 is a perspective view schematically illustrating a battery pack according to an embodiment of the present invention.
[44]
2 is a front perspective view schematically showing some battery modules of a battery pack according to an embodiment of the present invention.
[45]
3 is a rear perspective view schematically showing some battery modules of a battery pack according to an embodiment of the present invention.
[46]
4 is an exploded perspective view showing components of some battery modules of a battery pack according to an embodiment of the present invention.
[47]
5 is a side view schematically illustrating a battery pack according to an embodiment of the present invention.
[48]
6 is a partial perspective view schematically illustrating some battery modules of a battery pack according to an embodiment of the present invention.
[49]
7 is a partial perspective view schematically illustrating some battery modules of a battery pack according to another embodiment of the present invention.
[50]
8 is a partial cross-sectional view schematically illustrating a state taken along line C-C' of the battery pack of FIG. 7 .
[51]
9 is a partial cross-sectional view schematically illustrating a state of a battery pack cut in a horizontal direction according to another embodiment of the present invention.
[52]
10 is a partial side view schematically illustrating a part of a connection plate that is a part of a battery pack according to another embodiment of the present invention.
[53]
11 is a side view schematically showing some battery modules of a battery pack according to another embodiment of the present invention.
[54]
12 is a perspective view schematically illustrating connection plates provided in some battery modules of a battery pack according to another embodiment of the present invention.
[55]
13 is a perspective view schematically illustrating connection plates provided in some battery modules of a battery pack according to another embodiment of the present invention.
[56]
14 is a photograph of an experimental result of a welding test of a battery module according to a comparative example of the present invention.
[57]
15 is a photograph of an experimental result of a welding test of a battery module according to Example 1 of the present invention.
[58]
16 is a photograph of an experimental result of a welding test of a battery module according to another embodiment 2 of the present invention.
Modes for carrying out the invention
[59]
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of ​​the present invention.
[60]
Therefore, the configuration shown in the embodiments and drawings described in the present specification is only the most preferred embodiment of the present invention and does not represent all of the technical spirit of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.
[61]
[62]
1 is a perspective view schematically illustrating a battery pack according to an embodiment of the present invention. 2 is a front perspective view schematically showing some battery modules of a battery pack according to an embodiment of the present invention. 3 is a rear perspective view schematically showing some battery modules of a battery pack according to an embodiment of the present invention. And, FIG. 4 is an exploded perspective view showing the components of some battery modules of the battery pack according to an embodiment of the present invention.
[63]
1 to 4 , the battery pack 1000 according to the present invention includes a plurality of battery modules 200 , 201 , 202 , 203 , 204 , 205 , and 206 arranged in a front-rear direction.
[64]
Specifically, the battery module 200 may include a plurality of secondary batteries 100 , a module housing 210 , and a connection plate 220 .
[65]
Here, the secondary battery 100 may be a cylindrical battery cell. Specifically, the secondary battery 100 may include a cylindrical battery can 120 and an electrode assembly (not shown) accommodated in the battery can 120 .
[66]
In addition, the secondary battery 100 may be configured in a form in which the battery can 120 is erected in the vertical direction. In addition, the battery can 120 includes a material with high electrical conductivity, for example, the battery can 120 may include an aluminum or copper material.
[67]
In addition, electrode terminals 111a and 111b may be formed on the upper and lower portions of the battery can 120 , respectively. Specifically, a first electrode terminal 111a may be formed on a flat, circular upper surface of the upper end of the battery can 120 , and a second electrode terminal 111b may be formed on a flat, circular lower surface of the lower end of the battery can 120 . ) can be formed.
[68]
In addition, an electrically insulating member may be coated on the side of the battery can 120 . That is, since the battery can 120 is electrically connected to the electrode of the electrode assembly therein, an unintended conductive object contacts the battery can 120 to prevent electrical leakage from occurring. For example, an insulating film (not shown) may be coated to surround the side portion.
[69]
In addition, the electrode assembly (not shown) may be formed in a structure wound in a jelly-roll type with a separator interposed between the positive electrode and the negative electrode. A positive electrode tab may be attached to the positive electrode (not shown) to be connected to the first electrode terminal 111a of the upper end of the battery can 120 . A negative electrode tab may be attached to the negative electrode (not shown) to be connected to the second electrode terminal 111b at the lower end of the battery can 120 .
[70]
Furthermore, when viewed in the F direction, the plurality of secondary batteries 100 may be disposed in a horizontal direction in a vertical direction within the module housing 210 .
[71]
For example, as shown in FIG. 4 , one battery module 200 includes 23 secondary batteries 100 . In addition, the 23 secondary batteries 100 may be arranged to be adjacent to each other in a horizontal direction in a vertical direction. Furthermore, the positive electrode of the secondary battery 100 may be formed at the upper end, and the negative electrode may be formed at the lower end.
[72]
Each of the plurality of secondary batteries 100 may include an electrode terminal 110 . The electrode terminal 110 may include a positive terminal 111a and a negative terminal 111b.
[73]
Here, terms indicating directions such as front, back, left, right, up, and down may vary depending on the position of the observer or the shape of the object. However, in the present specification, for convenience of explanation, directions such as front, rear, left, right, top, and bottom are separately indicated with reference to the time when viewed in the F direction.
[74]
In addition, each of the arrows of the X-axis, Y-axis, and Z-axis indicated in FIG. 1 indicates the right, rearward, and upper directions.
[75]
Here, the module housing 210 may have an internal space to insert and accommodate the plurality of secondary batteries 100 . Specifically, in the module housing 210 , a plurality of hollows H1 may be formed to surround the outer surface of the secondary battery 100 . Furthermore, the module housing 210 may include left and right outer walls 210c and 210d and front and rear outer walls 210a and 210b.
[76]
In addition, the module housing 210 may include an upper case 211 and a lower case 212 .
[77]
Here, in the upper case 211 , a hollow H1 may be formed to surround the outer surface of the upper portion of the secondary battery 100 . Furthermore, the lower case 212 may be fastened to the lower portion of the upper case 211 , and a hollow H1 may be formed to surround the outer surface of the lower portion of the secondary battery 100 .
[78]
In addition, a coupling protrusion 213 protruding from the outer surface of the outer wall 210a may be formed on the outer wall 210a of the front side of the module housing 210 . In addition, the outer wall 210b of the rear side of the module housing 210 may be provided with a guide groove 215 recessed inward from the outer surface of the outer wall 210b so that the coupling protrusion 213 is inserted.
[79]
For example, as shown in FIG. 2 , two coupling protrusions 213 may be formed on the front outer wall 210a of the module housing 210 . And, as shown in FIG. 3 , two guide grooves 215 may be formed in the rear outer wall 210b of the module housing 210 .
[80]
Therefore, according to this configuration of the present invention, the coupling protrusion 213 of the module housing 210 of the present invention is inserted into the guide groove 215 of another battery module 200 to arrange the plurality of battery modules 200 . can be guided, so that the plurality of battery modules 200 can be easily arranged and fixed so as not to be easily separated from each other.
[81]
In addition, the connection plate 220 may include a body portion 225 and a connection portion 227 . Specifically, the main body 225 may be positioned above or below the plurality of secondary batteries 100 . That is, the main body 225 may be mounted on the upper or lower portion of the module housing 210 . At this time, FIG. 3 and FIG.As in 4, on the upper or lower portion of the module housing 210, there is a guide protrusion P1 protruding upward or downward to guide a position in which the body portion 225 of the connection plate 220 is mounted. can be formed. In addition, the connection plate 220, a guide hole (H4) perforated so that the guide projection (P1) is inserted may be formed.
[82]
Furthermore, the connection plate 220 may include an electrically conductive material. For example, the electrically conductive material may be a metal alloy including copper, nickel, aluminum, gold, silver, etc. as a main material.
[83]
For example, as shown in FIG. 4 , in the battery module 200 , each of the two connection plates 221 and 222 may be positioned on the upper and lower portions of the plurality of secondary batteries 100 , respectively. In addition, three guide spheres H4 may be formed on the connection plate 221 mounted on the upper portion of the module housing 210 , and three guide protrusions P1 are formed on the upper portion of the module housing 210 . can be Furthermore, three guide spheres H4 may be formed on the connection plate 222 mounted on the lower portion of the module housing 210 , and three guide protrusions P1 are formed on the lower portion of the module housing 210 . can be
[84]
Furthermore, a plurality of connection terminals 225c electrically connected to the electrode terminals 111 of the plurality of secondary batteries 100 may be provided in a portion of the main body 225 . Specifically, at least one connection opening H3 perforated in the vertical direction may be formed in the main body 225 . In addition, the connection terminal 225c of the connection plate 220 is in a horizontal direction from the inside of the edge of the connection opening H3 so as to be electrically connected to the electrode terminals 111 formed in the plurality of secondary batteries 100 . It may be formed to extend and protrude. Furthermore, the extended protruding end of the connection terminal 225c may have a branched structure divided into both sides with respect to the protruding extending direction.
[85]
For example, as shown in FIG. 4 , 23 connection openings H3 may be formed in each of the two connection plates 221 and 222 . In addition, 23 connection terminals 225c formed to protrude from the inside of the edge in the horizontal direction may be formed in each of the 23 connection openings H3 . Furthermore, the connection terminal 225c may have a branched structure that is split at both sides with respect to the protruding extension direction.
[86]
Meanwhile, the connection part 227 may be formed to protrude from the body part 225 in a left direction or a right direction. Also, the connecting portion 227 may have a shape in which the protruding and extending portion is bent upward or downward from the main body 225 . In addition, the bent end of the connection part 227 may be contacted with a portion of the other connection plate 220 .
[87]
For example, as shown in FIGS. 1 to 4 , the connection plate 221 mounted on the upper portion of the module housing 210 has 2 bent and extended downwards from the left and right ends of the main body 225 . A number of connecting portions 227 may be formed. In addition, the connection part 227 may be connected to a portion of the connection plate 222 of the other battery module 206 in which the bent end of the connection part 227 is contacted.
[88]
Furthermore, two connection parts 227 bent and extended upwardly from the left and right ends of the main body part 225 may be formed on the connection plate 222 mounted on the lower part of the module housing 210 . Also, in the connection part 227 , the bent end of the connection part 227 may be bonded to a portion of the other connection plate 220 to be connected.
[89]
Therefore, according to this configuration of the present invention, the present invention, the main body portion 225 mounted on the upper or lower portion of the module housing 210 and the main body portion 225 extend in the left and right directions and are bent in the upper or lower direction. By including the connection plate 220 having the connected connection part 227, the contact connection between the connection plates 221 and 222 can be made at the outside of the module housing 210 in the left and right direction, unlike the battery pack of the prior art. have. Accordingly, according to the present invention, it is unnecessary to secure a space in the front-rear direction for the contact connection between the connection plates 221 and 222 in the module housing 210, so that the battery module 200 is made slimmer in the front-rear direction. implementation is possible. Ultimately, it may have an effect of maximizing the energy density of the battery pack 1000 .
[90]
5 is a side view schematically illustrating a battery pack according to an embodiment of the present invention. And, FIG. 6 is a partial perspective view schematically showing some battery modules of a battery pack according to an embodiment of the present invention.
[91]
Referring to FIGS. 5 and 6 together with FIGS. 2 and 3 , a rib R1 extending horizontally from the outer surface may be formed on the outer wall 210d of the module housing 210 . Specifically, the rib R1 may be formed on each of the outer walls 210c and 210d in the left and right directions of the module housing 210 . In addition, the rib R1 may have a structure extending in the vertical direction and a structure extending in the front-rear direction. The rib R1 may extend outward from the outer wall 210d of the module housing 210 with respect to the center in which the secondary battery 100 is accommodated.
[92]
In addition, the module housing 210 may be formed with a spacing groove 214 in which a portion of the outer wall 210d is inserted in the inner direction. Specifically, the spacing groove 214 may be formed by inserting a portion of the rib R1 of the outer wall 210d so that the bent end of the connecting portion 227b is spaced apart from the outer wall 210d by a predetermined distance. Here, the predetermined interval is, when the connection portion 227b of the connection plate 222 is welded to a portion 227a of the other connection plate 221, no perforation occurs in the connection portion 227b during the heating process. It may be spaced apart as much as possible. That is, the spaced distance between the connecting portion 227b formed by the spacing groove 214 and the outer wall 210d means a distance that can secure an empty space sufficient for the heat of welding to escape to the outside effectively. .
[93]
Furthermore, the spacing groove 214 may have a size corresponding to the joint portion of the connection portion 227b of the connection plate 222 or slightly larger than that. For example, as shown in FIG. 5 , the connection part 227b of the connection plate may have an area S' joined to the connection part 227a of the other connection plate 221 .
[94]
And, referring to FIGS. 2 and 6 , the spacing groove 214 has a size corresponding to the joined region S′ on each of the outer walls 210c and 210d in the left and right directions of the module housing 210 . can The spacing groove 214 may be formed by inserting a portion of the rib R1 formed on each of the left and right outer walls 210c and 210d of the module housing 210 inwardly.
[95]
Therefore, according to this configuration of the present invention, in the present invention, a portion of the outer wall 210d is inserted in the inner direction so as to be spaced apart from the bent end of the connecting portion 227b at a predetermined distance on the outer wall of the module housing 210. By forming the groove 214, in the prior art, a portion of the outer wall of the module housing (eg, rib) is in close contact with the connection plate, so that welding heat is accumulated between the connection plate 220 and the module housing 210 during the welding process. It was easy to do so, and it is possible to solve the problem that welding defects are likely to occur, such as uneven welding of the welding parts due to uneven temperature distribution of the heating part, or perforation (holes) in a part. That is, the spacing groove 214 of the present invention can secure a predetermined space between the joint portion of the connection plate 220 and the outer wall of the module housing 210 , and the welding between the connection plates 221 and 222 . The heat generated during welding is not accumulated and can be effectively discharged to the outside.
[96]
Referring back to FIGS. 1 to 4 , the connection plate 220 may include a first connection plate 221 and a second connection plate 222 .
[97]
Specifically, in the first connection plate 221 , the first body part 225a may be positioned above the plurality of secondary batteries 100 . Also, the first connection part 227a protruding from the first body part 225a may be bent downward. For example, the first connection plate 221 may be electrically connected (bonded) to the positive terminal 111a positioned on the plurality of secondary batteries 100 . Furthermore, the first connection portion 227a of the first connection plate 221 is electrically connected (joined) to the second connection portion 227b of the second connection plate 222 provided in another battery module 200 . can be In addition, the connection terminal 225c of the first connection plate 221 may be bonded to the positive terminal 111a of the plurality of secondary batteries 100 through resistance welding.
[98]
Furthermore, in the second connection plate 222 , the second body part 225b is positioned under the plurality of secondary batteries 100 and the second connection part protrudes from the second body part 225b. 227b) may be bent in an upward direction. For example, the second connection plate 222 may be electrically connected (bonded) to the electrode terminals 111b positioned under the plurality of secondary batteries 100 .
[99]
Furthermore, the second connection part 227b of the second connection plate 222 may be in electrical contact with the first connection part 227a of the first connection plate 221 provided in another battery module 200 . . In addition, the connection terminals 225c of the second connection plate 222 are the plurality of secondary batteries 100 .

Claims
[Claim 1]
a plurality of battery modules arranged in a front-rear direction, wherein each of the plurality of battery modules includes: a plurality of secondary batteries having electrode terminals formed on upper and lower portions, respectively, and arranged in a horizontal direction; a body portion provided with a plurality of connection terminals positioned on the upper or lower portions of the plurality of secondary batteries and electrically connected to electrode terminals formed on one of the plurality of secondary batteries in a portion thereof; and a left or right direction from the main body a connection plate having a connecting portion protrudingly extending, a portion of the projecting extension is bent upward or downward from the body portion, and the bent end portion is joined to a portion of the other connection plate; and a module housing in which a plurality of hollows are formed to insert and receive the secondary battery, and spaced apart grooves in which a part of the outer wall is inserted inwardly so as to be spaced apart from the bent end of the connection part by a predetermined distance on the outer wall is formed. to the battery pack.
[Claim 2]
The module housing according to claim 1, wherein the module housing supports at least a portion of the remaining portions except for the joined portion of the connecting portion in an outward direction so that the portion joined to the other connecting plate of the connecting portion is spaced apart from the outer wall by a predetermined distance. A battery pack, characterized in that it is provided with a projection.
[Claim 3]
The battery pack according to claim 2, wherein the connecting portion has an overlapping portion with the bent end portion folded upward or downward, and the overlapping portion of the connecting portion is joined to a portion of the other connecting plate.
[Claim 4]
The battery according to claim 3, wherein the protrusion includes an end of the overlapping portion of the connection portion, or an end of the overlapping portion and an end of the other connecting plate, and a fixing groove inserted therein to be fixed by inserting the other end of the overlapping portion is formed. pack.
[Claim 5]
The battery pack according to claim 3, wherein a concave-convex structure protruding in a left and right direction is formed on the overlapping portion.
[Claim 6]
The module housing according to claim 1, wherein the module housing is provided with a conductive plate made of a metal material and positioned to face a portion joined to the other connection plate of the connection part and at least partially inserted and fixed to the outer wall. battery pack.
[Claim 7]
The method of claim 1, wherein the connection plate includes a first connection plate and a second connection plate, wherein the first connection plate comprises a first body portion positioned above the plurality of secondary batteries, and the first body. and a first connection part protruding from the unit and bent in a downward direction, wherein the second connection plate includes a second main body located under the plurality of secondary batteries, and a second body part protruding from the second main body and extending in an upward direction. and a second connection part bent to, wherein the bent end of the first connection part of the first connection plate is joined to the second connection part of the second connection plate provided in another battery module, and the first connection part and the Any one or more of the second connection portions has an extension structure that protrudes forward more than the frontmost distal end of the module housing or extends further rearward than the rearmost distal end of the module housing.
[Claim 8]
8. The method of claim 7, wherein the first connection plate is positioned so that a portion of the first connection portion overlaps an outer side of the second connection portion of the second connection plate, and extends from the first connection portion and extends from the second connection plate. A battery pack comprising a conductive part bent to surround a portion of an inner surface of the second connection part.
[Claim 9]
8. The method of claim 7, wherein a portion of the first connection portion is positioned to overlap an outer side of the second connection portion of the second connection plate, and the second connection plate extends from the second connection portion and extends from the first connection plate. The battery pack, characterized in that provided with a cover portion bent so as to cover a portion of the outer surface of the first connection portion.
[Claim 10]
An electronic device comprising a battery pack according to claim 1 .
[Claim 11]
10. A motor vehicle comprising a battery pack according to any one of claims 1 to 9.