Title of invention: Battery module to which space-saving ICB assembly is applied
Technical field
[One]
The present invention relates to a battery module, and more particularly, to a battery module to which an ICB assembly advantageous for energy density improvement is applied.
[2]
This application is a priority claim application for Korean Patent Application No. 10-2018-0120759 filed on October 10, 2018, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference.
Background
[3]
Recently, secondary batteries are attracting attention as a power source for electric vehicles (EV) and hybrid electric vehicles (HEV), which are proposed as a solution to air pollution such as gasoline vehicles and diesel vehicles that use fossil fuels.
[4]
In small mobile devices, one or two or three battery cells per device are used, whereas in mid- to large-sized devices such as automobiles, due to the need for high-power and large-capacity, a medium-to-large battery module electrically connected to a plurality of battery cells is used. A battery pack implemented by connecting a number of modules is sometimes used.
[5]
Since it is preferable that the medium and large-sized battery modules are manufactured with a small size and weight, if possible, they can be stacked with a high degree of integration, and prismatic cells, pouch-type cells, etc., which have a small weight-to-capacity ratio, are mainly used as battery cells applied to medium and large-sized battery modules. have.
[6]
These mid- to large-sized battery modules use electrical components called ICB (Inter Connection Board) to electrically connect battery cells. For example, in the case of a battery module using a pouch-type secondary battery, the ICB may include a plurality of bus bars and may be assembled where electrode leads of battery cells are located. Battery cells may be electrically connected in series, parallel, or a combination of series and parallel by attaching electrode leads to busbars of the ICB by welding or the like.
[7]
In addition, the mid- to large-sized battery module may further include a sensing means for detecting voltage and temperature in case some battery cells are overvoltage, overcurrent, or overheating and transmitting them to the BMS. Design measures to reduce the number of parts and volume are emerging.
[8]
As an example, as shown in Fig. 1, the ICB assembly according to the prior art is a front bus bar frame 20 and a rear bus bar frame 30, respectively assembled at the front and rear of the cell stack 10, and a cell stack. It is composed of a top frame 40 covering the upper portion of the sieve (10). In addition, as a sensing means 50 used to sense voltage information of battery cells, a FPC (FLEXIBLE PRINTED CIRCUIT) is configured to be attached to the top or bottom surface of the top frame 40.
[9]
The battery module may be configured by packaging the ICB assembly and the cell stack into a module case. Recently, as the module case, a square tube-shaped mono frame has been widely used as a hollow structure to improve energy density. However, the battery module according to the prior art as described above has the following problems.
[10]
The top frame 40 constituting the existing ICB assembly has the advantage of protecting the upper part of the cell stack 10 and the FPC 50, but the entire width of the cell stack 10 that can be accommodated in a mono frame is reduced by its thickness. As a result, there is a problem that the energy density of the battery module decreases.
[11]
In addition, due to the top frame 40, it is difficult to meet the allowable dimensional tolerances in the assembly process of accommodating the cell stack 10 in the mono frame. That is, the battery module of the mono frame type maximizes energy density by storing the cell stack 10 and the ICB assembly together in a very tight mono frame. Therefore, it is more difficult to meet the allowable dimensional tolerances for assembling the cell stack 10 to fit the full width of the mono frame, and thus, there is a problem in that the yield is lowered during the assembling process. Accordingly, there is a need to develop a battery module to which the ICB assembly of a new structure is applied.
Detailed description of the invention
Technical challenge
[12]
The present invention was created in consideration of the above-described problems, and an object of the present invention is to provide a battery module to which an ICB assembly capable of minimizing the number of parts to support a cell stack and increasing the energy density of the cell stack is applied. .
[13]
Another object of the present invention is to provide a battery module having excellent assembly properties between an ICB assembly and a cell stack and a module case.
[14]
Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by examples of the present invention. In addition, it will be easily understood that the objects and advantages of the present invention can be realized by the means shown in the claims and combinations thereof.
Means of solving the task
[15]
According to an aspect of the present invention, a battery module including a cell stack including a plurality of battery cells stacked in one direction, and an ICB assembly electrically connected to the plurality of battery cells and sensing voltage information,
[16]
The ICB assembly includes a plurality of busbars each in contact with electrode leads of the battery cells, a front busbar frame assembled in front of the cell stack and a rear busbar assembled behind the cell stack frame; A sensing member fixed to one side of the front bus bar frame and the other side to be fixed to the rear bus bar frame; And at least one bridge plate connected to the front bus bar frame and the rear bus bar frame to maintain a constant distance between the front bus bar frame and the rear bus bar frame.
[17]
The at least one bridge plate is two bridge plates, and may be disposed one on both sides of the front bus bar frame and the rear bus bar frame.
[18]
At least one of the front busbar frame and the rear busbar frame may include a bridge assembly portion hingedly coupled to end portions of the bridge plates on upper side ends of both sides.
[19]
The bridge assembly portion may include a hinge shaft portion protruding from a surface, and end portions of the bridge plates may have perforations fitted to the hinge shaft portion.
[20]
A portion of the hinge shaft portion that passes through the perforation and is exposed to the rear surface of the bridge plate may be deformed to be larger than the diameter of the perforation.
[21]
The bridge assembly unit may further include a stopper unit that restricts rotation of the front bus bar frame and the rear bus bar frame relative to the bridge plate by a predetermined angle or more about the hinge shaft.
[22]
The stopper portion is provided at a predetermined distance apart from the circumference of the hinge shaft portion, and when the front bus bar frame or the rear bus bar frame is formed at an angle of 90 degrees to the bridge plate, the stopper portion contacts the lower surface of the end portion of the bridge plate It may include a first stopper surface.
[23]
The stopper part is provided perpendicularly to the first stopper surface, and when the front bus bar frame or the rear bus bar frame is formed at an angle of 180 degrees with the bridge plate, a second stopper abuts against the upper surface of the end portion of the bridge plate. It may further include cotton.
[24]
At least one of the front busbar frame and the rear busbar frame includes slits through which the electrode leads pass back and forth, and the slits may extend to a bottom end of the front busbar frame or the rear busbar frame.
[25]
The sensing member may be provided with any one of a FPC (FLEXIBLE PRINTED CIRCUIT) and an FFC (Flexible Flat Cable).
[26]
The FPC or FFC may be disposed to pass through a slot formed through the front busbar frame and the rear busbar frame adjacent to the bottom of the top surface.
[27]
A module case for integrally accommodating the cell stack and the ICB assembly in a square tube shape, and a module cover for shielding the front and rear sides that are open in the module case may be further included.
[28]
According to another aspect of the present invention, a battery pack including the above-described battery module may be provided.
Effects of the Invention
[29]
According to an aspect of the present invention, a battery module to which an ICB assembly capable of minimizing the number of parts to support a cell stack and increasing the energy density of the cell stack may be provided.
[30]
In addition, a battery module with improved assembly convenience between the ICB assembly and the cell stack and the module case may be provided.
Brief description of the drawing
[31]
1 is a schematic perspective view of a cell stack of a battery module and a bus bar frame assembly according to the prior art.
[32]
2 is a schematic perspective view of a battery module according to an embodiment of the present invention.
[33]
3 is a combined perspective view showing a schematic configuration of a cell stack and an ICB assembly accommodated in the module case of FIG. 2.
[34]
4 and 5 are schematic combined and partially exploded perspective views of an ICB assembly according to an embodiment of the present invention.
[35]
6 is an enlarged view of part A of FIG. 5.
[36]
7 and 8 are views for explaining an assembly process of a bridge assembly unit and a bridge plate according to an embodiment of the present invention.
[37]
9 and 10 are views for explaining a rotation angle limitation of a front busbar frame according to an embodiment of the present invention.
[38]
11 is a view for explaining an assembly structure of a front busbar frame and a sensing member according to another embodiment of the present invention.
Mode for carrying out the invention
[39]
Since the embodiments of the present invention are provided to more completely describe the present invention to a person skilled in the art, the shape and size of components in the drawings may be exaggerated, omitted, or schematically illustrated for a more clear description. Therefore, the size or ratio of each component does not entirely reflect the actual size or ratio.
[40]
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors appropriately explain the concept of terms in order to explain their own invention in the best way. Based on the principle that it can be defined, it should be interpreted as a meaning and concept consistent with the technical idea of ​​the present invention.
[41]
Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical spirit of the present invention, and various equivalents that can replace them at the time of the present application It should be understood that there may be water and variations.
[42]
2 is a schematic perspective view of a battery module according to an embodiment of the present invention, and FIG. 3 is a combined perspective view showing a schematic configuration of a cell stack and an ICB assembly accommodated in the module case of FIG. 2.
[43]
Referring to these drawings, a battery module 1 according to an embodiment of the present invention includes a cell stack 100, an ICB assembly 200, a module case 300, and a module cover 400.
[44]
First, when the cell stack 100 is described, the cell stack 100 may be an assembly of a plurality of battery cells 110. Here, the battery cell 110 is a pouch-type secondary battery and, although not shown in detail, is a bi-directional type pouch-type secondary battery in which the positive lead and the negative lead protrude in opposite directions.
[45]
The pouch-type secondary battery may be composed of an electrode assembly, an electrolyte, and a pouch case. The pouch exterior material may be composed of two pouches, and at least one of them may have a concave inner space. In addition, the electrode assembly may be accommodated in the inner space of the pouch. A sealing part is provided on the outer circumferential surfaces of the two pouches so that the sealing parts are fused to each other, so that the inner space in which the electrode assembly is accommodated may be sealed. An electrode lead 111 may be attached to the electrode assembly. A part of the electrode lead 111 is fused to the sealing part of the pouch case, and the remaining part extends to the outside of the pouch case and is exposed, thereby functioning as an electrode terminal of a secondary battery.
[46]
These pouch-type secondary battery cells are erected in a vertical direction and stacked in a horizontal direction to form a cell stack 100. Hereinafter, the positions where the electrode leads 111 are located in the secondary battery cell are defined as a front part and a rear part of the cell stack 100.
[47]
The ICB assembly 200 is a component for electrically connecting the plurality of battery cells 110 forming the cell stack 100 and sensing voltage information of the battery cells 110, and the front bus bar frame 210 , A rear busbar frame 220, a sensing member 230, and a bridge plate 240 may be included.
[48]
The front bus bar frame 210 and the rear bus bar frame 220 are disposed at the front and rear portions of the cell stack 100, respectively, as shown in FIG. It may be provided in the shape of a plate body supporting the part. The front busbar frame 210 and the rear busbar frame 220 include a plurality of busbars disposed on the front side and a slit capable of passing the electrode leads 111 to the left and/or right side thereof based on the busbar ( 212).
[49]
The slits 212 of the present embodiment are provided in a form that extends to the bottom of the front bus bar frame 210 or the rear bus bar frame 220. In this case, the front bus bar frame 210 and the rear bus bar frame 220 ), it is possible to assemble the electrode leads 111 of the battery cells 110 from the bottom to the top, so that the assembling property may be improved.
[50]
In particular, although to be described later, the front bus bar frame 210 and the rear bus bar frame 220 are connected to the bridge plates 240 so that the ICB assembly 200 having a constant spacing between them is integrated into the cell stack 100. In the case of this embodiment to be assembled, a slit structure that is open to the bottom of the frame may be more useful.
[51]
The battery cells 110 may be electrically connected to the bus bars 211 by welding the electrode leads 111 extracted through the slits 212 to the bus bars 211.
[52]
For example, in the case of this embodiment, a total of 12 battery cells 110 are connected in parallel by two via four busbars disposed on the front busbar frame 210 and three busbars disposed on the rear busbar frame 220 In this way, 6 bundles of battery cells 110 connected in parallel by two are connected in series.
[53]
In the battery cells 110, electrode leads 111 of the same polarity may be integrally attached to the bus bars 211 provided in the front bus bar frame 210 or the rear bus bar frame 220 in a bundle unit. .
[54]
As shown in FIG. 3, positive leads of a bundle of battery cells 110 are superimposed and welded to the bus bar 211 located at the leftmost of the four bus bars 211 of the front bus bar frame 210 Then, the negative leads of the battery cells 110 of another bundle are superposed and welded to the bus bar 211 located at the rightmost side. In addition, the remaining front bus bar frame 210 and the bus bars 211 of the rear bus bar frame 220 are connected to the anode leads of one bundle of battery cells 110 and another bundle of battery cells 110 adjacent to each other. ) Of the negative leads are welded together, so that a total of 12 battery cells 110 may be connected in series with 6 bundles of 2 battery cells 110.
[55]
Meanwhile, the battery module 1 according to the present embodiment includes a total of 12 battery cells 110 connected in series and in parallel, but the scope of the present invention is not limited thereto. That is, the number of battery cells 110 constituting the cell stack 100 may be more or less than 12 of course. In addition, the number and position of the bus bars 211 may be added or subtracted or changed as much as the number of the battery cells 110.
[56]
The sensing member 230 senses the voltage or temperature of each battery cell 110 in case the battery cells 110 are overvoltage, overcurrent, or overheats, and transmits it to the BMS to charge the battery cell 110 in question. It is a means for controlling discharge.
[57]
Since the battery cells 110 are connected in series through the bus bars 211, the voltage of each battery cell 110 can be known by connecting a sensing terminal to each bus bar to sense a voltage. The voltage values ​​of the battery cells 110 sensed in this way may be transmitted to a BMS (not shown), and the BMS may control the charging and discharging states of the abnormal battery cells 110 based on the voltage values.
[58]
As the sensing member 230, any one of a FPC (FLEXIBLE PRINTED CIRCUIT), FFC (Flexible Flat Cable), or a harness cable may be employed, and among them, FPC or FFC, which is advantageous for increasing the degree of freedom of space due to simple wiring and small volume, is used. It may be desirable. In addition, a thermistor 231 for measuring the temperature of the battery cells 110 may be further added to the sensing member 230.
[59]
The FPC 230 employed as the sensing member 230 in this embodiment may be disposed extending from the top of the cell stack 100 along the longitudinal direction of the cell stack 100, and one side thereof is a front busbar frame It is fixed to the upper end of 210 and the other side of the rear busbar frame 220 by being fixed to the upper end, it is possible to secure the fixation.
[60]
The bridge plate 240 maintains a constant spacing between the front bus bar frame 210 and the rear bus bar frame 220 and supports them to rotate at a predetermined angle. The bridge plate 240 is made of a metal or reinforced plastic having excellent mechanical rigidity, such as a steel material, in the form of an elongated plate to replace the top frame of the ICB assembly according to the prior art.
[61]
Referring to FIGS. 4 and 5, when looking specifically at the ICB assembly 200 according to the present embodiment, two bridge plates 240 are provided at both upper ends of the front busbar frame 210 and the rear busbar frame 220. It is connected one by one to the side, and the gap between them is uniformly supported. In particular, the two bridge plates 240 are coupled to both sides under the upper surface of the front bus bar frame 210 and the rear bus bar frame 220, so that the ICB assembly 200 of this embodiment has a top frame 40 The overall width is smaller than the existing ICB assembly (see Fig. 1).
[62]
That is, the ICB assembly 200 of the present embodiment is reduced in height by at least the thickness of the top frame 40 compared to the conventional ICB assembly having the top frame 40. Accordingly, the total width of the battery cells 110 is increased as much as the space in which the top frame 40 is deleted, and the cell stack 100 and the ICB assembly 200 can be accommodated in the module case 300, thereby increasing energy density. .
[63]
In addition, even with vibration or shock, the distance between the front busbar frame 210 and the rear busbar frame 220 can be kept constant by the bridge plate 240, so that the FPC 230 can be prevented from being torn or disconnected. have.
[64]
Next, a hinged connection structure between the front busbar frame 210, the rear busbar frame 220, and the bridge plate 240 constituting the ICB assembly 200 will be described in detail.
[65]
Since the hinged structure of the front busbar frame 210 and the bridge plate 240 is the same as the hinged structure of the rear busbar frame 220 and the bridge plate 240, hereinafter, the front busbar frame 210 and the bridge plate ( The description of the hinge coupling structure of 240) replaces the description of the hinge coupling structure of the rear busbar frame 220 and the bridge plate 240.
[66]
The front bus bar frame 210 and the rear bus bar frame 220 are bridges for connecting both end portions 241 of the bridge plate 240 to the upper end portions of both sides, respectively, as shown in FIGS. 5 and 6 It has an assembly part 213.
[67]
The bridge assembly portion 213 includes a hinge shaft portion 215 protruding from the surface (in the -Y axis direction), and the end portion 241 of the bridge plate 240 coupled thereto is the hinge shaft portion 215 It has a perforation 243 having a diameter that can be inserted.
[68]
As shown in FIG. 7, the perforation 243 is fitted to the hinge shaft portion 215, and then, as shown in FIG. 8, the head portion of the hinge shaft portion 215 is deformed to be larger than the diameter of the perforation 243, and the bridge plate 240 The end portion 241 of the can be prevented from being separated from the bridge assembly portion 213.
[69]
Here, as a deformation processing method of the hinge shaft portion 215, forging processing, hot melting processing, and spinning processing may be employed. As an alternative to the present embodiment, a hole may be drilled in the surface of the bridge assembly 213 and the end portion 241 of the bridge plate 240 may be coupled to the bridge assembly 213 using rivets or shoulder bolts.
[70]
As described above, the front bus bar frame 210 or the rear bus bar frame 220 is hingedly coupled to the bridge plate 240 so that the ICB assembly 200 can be easily assembled to the cell stack 100.
[71]
Incidentally, in order to assemble the ICB assembly 200 into the cell stack 100, the electrode leads 111 of the battery cells 110 are connected to the slits 212 of the front bus bar frame 210 and the rear bus bar frame ( 220) It is inserted into each of the slits 212, and the portion exiting from the slits 212 must be welded to the surfaces of the bus bars.
[72]
At this time, in this embodiment, the front bus bar frame 210 and the rear bus bar frame 220 are configured to be rotatable relative to the bridge plate 240, so that the front bus bar frame 210 or the rear bus bar frame 220 ) May be rotated outward to secure an assembly space, and then the electrode leads 111 may be inserted into the slits 212. For reference, in this embodiment, not only the front busbar frame 210 and the rear busbar frame 220 can rotate, but also the slits 212 are open to the bottom of each busbar frame, so that the electrode leads 111 are slit. It is more convenient to fit into the (212).
[73]
The bridge assembly part 213 may further include a stopper part 217 having a first stopper surface 217a and a second stopper surface 217b.
[74]
The stopper part 217 serves to restrict the front bus bar frame 210 or the rear bus bar frame 220 to be rotatable in an angle range of 90 degrees to 180 degrees with respect to the bridge plate 240. Accordingly, it is possible to prevent misassembly or damage to the electrode leads 111 of the battery cells 110 due to over-rotation of the front bus bar frame 210 or the rear bus bar frame 220.
[75]
Referring back to FIG. 6, a side upper end of the front busbar frame 210 has a stepped surface of a rectangular area in which a portion is recessed (in the +Y axis direction) than other portions. The hinge shaft portion 215 is positioned in the center of the recessed stepped surface, and a first stopper surface 217a and a second stopper surface 217b are provided at a predetermined distance apart from the circumference of the hinge shaft portion 215. The first stopper surface 217a and the second stopper surface 217b are orthogonal to each other and may be implemented in a shape such as a wall covering two circumferential surfaces of the hinge shaft portion 215.
[76]
This first stopper surface (217a), as shown in Figure 9, when the front bus bar frame 210 and the angle formed by the bridge plate 240 is 90 degrees, the end portion 241 of the bridge plate 240 ) The front bus bar frame 210 is in contact with the lower surface so that it cannot be rotated in the inner direction toward the cell stack 100. In the above state, the front bus bar frame 210 may rotate only in an outward direction, as shown in FIG. 10.
[77]
The second stopper surface 217b is formed at a right angle to the first stopper surface 217a, so that when the front busbar frame 210 and the bridge plate 240 are 180 degrees, the bridge plate 240 The end of the 241 abuts on the upper surface. Therefore, the front busbar frame 210 cannot rotate more than 180 degrees with respect to the bridge plate 240.
[78]
Therefore, it can be said that the front busbar frame 210 according to the present embodiment is limited in a rotatable section within the range of 90 degrees to 180 degrees with respect to the bridge plate 240. Of course, the same is true for the rear busbar frame 220.
[79]
The module case 300 is a structure that forms the exterior of the battery module 1 and may be manufactured in the shape of a square tube by, for example, an extrusion or die casting method. In the module case 300 (see FIG. 2 ), the cell stack 100 and the ICB assembly 200 that are mutually assembled may be inserted and accommodated.
[80]
The module case 300 may be manufactured to have a dimension such that the cell stack 100 in which the ICB assembly 200 is assembled can be inserted into an internal space by force-fitting. Since the cell stack 100 may be pressed into the inner space of the module case 300, there is an effect of preventing the flow of the battery cells 110 and alleviating the swelling phenomenon. The module cover 400 may be mounted on the front and rear portions of the module case 300. The module cover 400 may be made of an insulating material such as plastic, and serves to shield the electrode leads 111 and bus bars of the battery cells 110 from being exposed to the outside.
[81]
Next, another embodiment of the present invention will be briefly described with reference to FIG. 11. The same reference numerals denote the same members, and redundant descriptions of the same members will be omitted, and differences from the above-described embodiments will be mainly described.
[82]
The battery module 1 according to another embodiment of the present invention has a difference in the fixing structure of the FPC as compared to the above-described embodiment. For reference, since the structure in which the FPC is fixed to the front busbar frame 210 and the rear busbar frame 220 is the same, the description will be made based on the front busbar frame 210.
[83]
Referring to FIG. 11, the front busbar frame 210 may further include a slot 218 formed through the plate surface at a position adjacent to the bottom of the top surface. The FPC may pass through the slot 218 and extend in front of and behind the front busbar frame 210.
[84]
In this embodiment, compared to the above-described embodiment, since the FPC is constrained by the slot 218, the fixed state can be stably maintained even with vibration or impact. In addition, the position of the FPC can be lowered below the top surfaces of the front busbar frame 210 and the rear busbar frame 220, so that when the FPC is stored in the module case 300, it is caused by friction with the inner wall of the module case 300. FPC damage can be eliminated.
[85]
Meanwhile, the battery pack according to the present invention may include one or more battery modules 1 according to the present invention. In addition, the battery pack according to the present invention includes, in addition to the battery module 1, a pack case for accommodating the battery module 1, various devices for controlling charge/discharge of the battery module 1, such as BMS (Battery Management System), a current sensor, a fuse, and the like may be further included.
[86]
The battery pack according to the present invention may be used as an energy source of a vehicle such as an electric vehicle or a hybrid vehicle, or a power storage device (ESS).
[87]
As described above, although the present invention has been described by the limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of ​​the present invention and the following by those of ordinary skill in the art to which the present invention pertains. It goes without saying that various modifications and variations are possible within the equivalent range of the claims to be described.
[88]
Meanwhile, in the present specification, terms indicating directions such as up, down, left, and right are used, but these terms are for convenience of description only, and may vary depending on the location of the object or the position of the observer. It is obvious to those skilled in the art.
Claims
[Claim 1]
A battery module comprising a cell stack including a plurality of battery cells stacked in one direction, and an ICB assembly electrically connected to the plurality of battery cells and sensing voltage information, wherein the ICB assemblies each include the battery cells A front bus bar frame assembled in front of the cell stack and a rear bus bar frame assembled at a rear side of the cell stack, having a plurality of bus bars in contact with the electrode leads of the cell stack; A sensing member fixed to one side of the front bus bar frame and the other side to be fixed to the rear bus bar frame; And at least one bridge plate connected to the front bus bar frame and the rear bus bar frame to maintain a constant distance between the front bus bar frame and the rear bus bar frame.
[Claim 2]
The battery module of claim 1, wherein the at least one bridge plate is two bridge plates, and is disposed one on both side surfaces of the front bus bar frame and the rear bus bar frame.
[Claim 3]
The battery module of claim 1, wherein at least one of the front busbar frame and the rear busbar frame includes a bridge assembly portion to which end portions of the bridge plates are hingedly coupled to upper end portions of both side surfaces.
[Claim 4]
The battery module according to claim 3, wherein the bridge assembly portion includes a hinge shaft portion protruding from a surface, and an end portion of the bridge plates includes a perforation fitted to the hinge shaft portion.
[Claim 5]
The battery module of claim 4, wherein a portion of the hinge shaft portion that passes through the perforation and is exposed to the rear surface of the bridge plate is deformed to be larger than a diameter of the perforation.
[Claim 6]
The method of claim 4, wherein the bridge assembly portion further comprises a stopper portion that restricts rotation of the front bus bar frame and the rear bus bar frame relative to the bridge plate by a predetermined angle or more around the hinge shaft portion. Battery module.
[Claim 7]
The bridge plate of claim 6, wherein the stopper part is provided at a predetermined distance apart from the circumference of the hinge shaft, and when the front bus bar frame or the rear bus bar frame is formed at an angle of 90 degrees to the bridge plate. Battery module, characterized in that it comprises a first stopper surface in contact with the lower end of the end.
[Claim 8]
The end of the bridge plate according to claim 7, wherein the stopper part is provided perpendicularly to the first stopper surface, and when the front bus bar frame or the rear bus bar frame is formed at an angle of 180 degrees to the bridge plate. Battery module, characterized in that it further comprises a second stopper surface in contact with the upper surface.
[Claim 9]
The method of claim 1, wherein the front bus bar frame and the rear bus bar frame have slits through which the electrode leads pass back and forth, and the slits are opened to the bottom of the front bus bar frame or the rear bus bar frame. Battery module characterized by.
[Claim 10]
The battery module according to claim 1, wherein the sensing member is provided with any one of a FPC (FLEXIBLE PRINTED CIRCUIT) and an FFC (Flexible Flat Cable).
[Claim 11]
The battery module of claim 10, wherein the FPC or FFC is disposed to pass through a slot formed through the front busbar frame and the rear busbar frame adjacent to the bottom of the top surface.
[Claim 12]
The method of claim 1, further comprising a module case for integrally housing the cell stack and the ICB assembly in a square tube shape, and a module cover for shielding the front and rear sides of the module case. Battery module.
[Claim 13]
A battery pack comprising the battery module according to any one of claims 1 to 12.