Specification
Title of the invention: Battery module including busbar assembly
Technical field
[One]
The present invention relates to a battery module including a bus bar assembly, and more particularly, to a battery module in which manufacturing cost of a product is reduced due to a design change in an internal configuration.
[2]
This application is a priority claim application for Korean Patent Application No. 10-2017-0172515 filed on December 14, 2017, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference.
Background
[3]
Currently commercialized secondary batteries include nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and lithium secondary batteries, among which lithium secondary batteries have little memory effect compared to nickel-based secondary batteries, so charging and discharging are free. The self-discharge rate is very low and the energy density is high.
[4]
These lithium secondary batteries mainly use lithium-based oxides and carbon materials as a positive electrode active material and a negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate to which the positive electrode active material and the negative electrode active material are applied, respectively, are disposed with a separator therebetween, and a case material for sealing and receiving the electrode assembly together with an electrolyte solution, that is, a battery pouch case material.
[5]
In general, lithium secondary batteries may be classified into can-type secondary batteries in which an electrode assembly is embedded in a metal can, and pouch-type secondary batteries in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet, depending on the shape of the exterior material.
[6]
In recent years, secondary batteries are widely used not only in small devices such as portable electronic devices, but also in mid- to large-sized devices such as automobiles and power storage devices. When used in such a medium-sized device, a large number of secondary batteries are electrically connected to increase capacity and output. In particular, pouch-type secondary batteries are widely used in such medium-sized devices due to the advantage of easy stacking.
[7]
And, in order to electrically connect the secondary battery inside the battery module, the electrode leads are interconnected, and the connection portion is welded to maintain such a connection state. Furthermore, the battery module may have parallel and/or series electrical connection between secondary batteries, and for this purpose, one end of the electrode lead is contact-fixed to a bus bar for electrical connection between the secondary batteries by welding or the like.
[8]
In addition, the electrical connection between the secondary batteries is often constructed in a manner in which electrode leads are bonded to a bus bar. At this time, in order to electrically connect the secondary batteries in parallel, electrode leads of the same polarity are connected and bonded to each other, and in order to be electrically connected in series, electrode leads of different polarities are connected and bonded to each other.
[9]
Furthermore, in order to apply a plurality of bus bars, the battery module is provided with a bus bar frame made of an insulating material capable of mounting a bus bar.
[10]
However, the electrical connection configuration of a plurality of secondary batteries applied to the existing battery module, that is, of the applied secondary batteries, is applied whenever the number of secondary batteries electrically connected in series and the number of secondary batteries connected in parallel are changed. The type of bus bar and the shape of the bus bar frame needed to be changed.
[11]
In addition, in the busbar assembly formed at each of the front and rear of the battery module, the shape of the busbar frame applied to each of the front and rear needs to be designed differently depending on whether or not a module bus bar for mounting module terminals is applied. There was. Accordingly, it is necessary to manufacture two types of busbar frames of one battery module, which causes an increase in manufacturing cost.
[12]
In conclusion, as in the prior art, due to frequent design changes of the busbar frame configurations according to the design change of the battery module, the dualization of the busbar and the busbar frame shape is deepened, and the redesign of the busbar and the busbar frame Accordingly, there was a problem in that the manufacturing time and manufacturing cost were increased due to the additional design cost and the need to newly manufacture the mold, and the verification work of the product.
[13]
Accordingly, there is a need for a technology capable of providing a battery module that reduces the manufacturing cost of a product according to a design change of an internal configuration.
Detailed description of the invention
Technical challenge
[14]
Accordingly, the present invention has been devised to solve the above problems, and an object of the present invention is to provide a battery module in which manufacturing cost of a product is reduced due to a design change in an internal configuration.
[15]
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
[16]
The battery module according to the present invention for achieving the above object,
[17]
A cell assembly including a plurality of secondary batteries each having a plurality of electrode leads and arranged to be stacked in at least one direction; And
[18]
A bus bar assembly including a plurality of bus bars electrically connecting between the plurality of secondary batteries and having at least one through hole formed therein so that the electrode leads are inserted, and a bus bar frame configured to mount the plurality of bus bars on an outer surface Including,
[19]
The bus bar frame includes a bus bar fixing portion configured to have an insertion space extending in the left and right directions so as to freely set the position of the bus bar in the left and right directions, and fixing the upper and lower ends of the bus bar, and the bus bar A busbar opening may be provided so that the through hole of the busbar is exposed inward as the position in the left and right direction of is changed.
[20]
In addition, the busbar may have a plate shape, and a through hole penetrating in the front-rear direction may be formed in the plate shape of the busbar.
[21]
Moreover, the busbar fixing part may have a hook structure in which a shape of a ring extends in a left-right direction to press at least one of the upper and lower ends of the busbar in an inward direction.
[22]
In addition, the bus bar fixing part may include an insertion groove in which at least one of the upper and lower ends of the bus bar is inserted and a groove inserted in an upper or lower direction extends in a horizontal direction.
[23]
Further, a plurality of fixing protrusions protruding in a direction in which the bus bar is located may be formed on the inner surface of the insertion groove at predetermined intervals.
[24]
In addition, a fitting groove in which an upper direction is inserted may be formed at an end of the bus bar so that the fixing protrusion is inserted therein.
[25]
Furthermore, a distance adjustment rod interposed between the plurality of bus bars and extending in the left and right direction may be inserted into the insertion groove.
[26]
Further, a pressing protrusion configured to press the lower end of the bus bar in an outward direction may be formed on the inner surface of the insertion groove.
[27]
Further, the busbar opening portion may be opened to a length greater than the length of the busbar in the left-right direction.
[28]
In addition, one opening may be formed in the busbar opening portion so that a part of rear surfaces of all the plurality of busbars mounted on the outer surface is exposed to the inside.
[29]
In addition, the battery module according to the present invention for achieving the above object,
[30]
A cell assembly including a plurality of secondary batteries each having a plurality of electrode leads and arranged to be stacked in at least one direction; And a plurality of busbars electrically connected between the plurality of secondary batteries and formed with at least one through hole so that the electrode leads are inserted and electrically connected to the sensing circuit board, and the plurality of busbars are mounted on the outer surface. It may include a bus bar assembly having a bus bar frame.
[31]
In addition, the bus bar frame has an insertion space extending in the left and right directions so as to freely set the position of the bus bar in the left and right directions, and a bus bar fixing portion configured to fix the upper and lower ends of the bus bar, and the As the position of the bus bar in the left and right direction is varied, a bus bar opening portion may be provided so that the through hole of the bus bar is exposed inward.
[32]
Further, the busbar fixing part may include an insertion groove in which at least one of the upper and lower ends of the bus bar is inserted and a groove inserted in an upper or lower direction extends in a left-right direction.
[33]
In addition, a plurality of fixing protrusions protruding in the direction in which the bus bar is located are formed on the inner surface of the insertion groove at predetermined intervals, and an upper direction insertion groove is formed at the end of the bus bar so that the fixing protrusion is inserted into the interior. I can.
[34]
Moreover, the battery pack according to the present invention for achieving the above object may include at least one battery module.
[35]
And, the vehicle according to the present invention for achieving the above object may be provided with the present battery pack.
Effects of the Invention
[36]
According to an aspect of the present invention, the battery module is provided with a busbar fixing portion so as to freely set the position of the busbar in the left-right direction on the busbar frame, without affecting the change in the position of the busbar due to the design change, A busbar opening is provided so that an opening through which the through hole of the busbar is exposed inward can be provided as the position of the busbar in the left and right direction is changed, and the left and right direction of the busbar without changing the design of the busbar frame It is possible to reset the position of.
[37]
Moreover, according to this aspect of the present invention, the bus bar fixing unit includes a hook structure and an insertion groove extending in the left and right directions so that the position where the bus bar is to be fixed can be freely set, and thus the bus bar is Even when the size or location of the battery is changed, the existing bus bar frame can be used without the need to redesign or remanufacture the bus bar frame, so that the production cost of the battery module can be greatly reduced.
[38]
In addition, according to one aspect of the present invention, the busbar frame is required to change the design of the busbar frame even when the module busbar is not applied to the busbar frame by forming a separate hook structure so that the module busbar can be fixed. Without, it is possible to use an existing busbar frame. Accordingly, the busbar frame can be applied to both the front and rear of the battery module, so that the design cost and manufacturing cost of the busbar frame can be effectively reduced.
[39]
Moreover, according to one aspect of the present invention, the present invention uses a fastening structure between the fixing protrusion formed in the insertion groove provided with the bus bar fixing part and the fitting groove formed in the bus bar, preventing the bus bar from moving in the left and right directions at the set position. can do. In addition, the insertion groove may guide the rotational movement so that the upper end of the bus bar can be inserted into the hook structure after the bus bar is inserted into the insertion groove, thereby increasing the manufacturing process efficiency of the bus bar assembly.
Brief description of the drawing
[40]
1 is a perspective view schematically showing a battery module according to an embodiment of the present invention.
[41]
2 is a side view schematically showing a secondary battery, which is a part of a battery module according to an embodiment of the present invention.
[42]
3 is a partially enlarged perspective view showing an enlarged area C′ of the battery module of FIG. 1.
[43]
FIG. 4 is a horizontal cross-sectional view schematically illustrating a battery module cut along the line A-A' of FIG. 1.
[44]
5 is a perspective view schematically showing a bus bar and a bus bar frame, which are some configurations of a battery module according to an embodiment of the present invention.
[45]
6 is a schematic front view of a busbar frame, which is a part of a battery module according to an embodiment of the present invention.
[46]
7 is a schematic front view of a bus bar frame, which is a part of a battery module according to another embodiment of the present invention.
[47]
8 is a front view schematically showing a bus bar frame, which is a part of a battery module according to another embodiment of the present invention.
[48]
9 is a front view schematically showing a rear busbar frame and a mounted busbar, which are some components of a battery module according to an embodiment of the present invention.
[49]
FIG. 10 is a front view schematically showing a rear busbar frame and a mounted busbar, which are some components of a battery module according to another embodiment of the present invention.
[50]
11 is a partial perspective view schematically showing a state in which a bus bar, which is a part of a battery module according to an embodiment of the present invention, is mounted on a bus bar frame.
[51]
12 is a partial perspective view schematically showing a state in which a bus bar, which is a part of a battery module according to another exemplary embodiment, is mounted on a bus bar frame.
[52]
13 is a partial perspective view schematically showing a state mounted on a bus bar frame, which is a part of a battery module according to another embodiment of the present invention.
Mode for carrying out the invention
[53]
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 describe 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.
[54]
Accordingly, 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 of the technical spirit of the present invention. It should be understood that there may be equivalents and variations.
[55]
1 is a perspective view schematically showing a battery module according to an embodiment of the present invention. And, FIG. 2 is a side view schematically showing a secondary battery, which is a part of a battery module according to an embodiment of the present invention.
[56]
1 and 2, a battery module 200 according to an embodiment of the present invention includes a cell assembly 210 and a bus bar assembly 220.
[57]
Here, the cell assembly 210 may include a plurality of secondary batteries 100 arranged in the left and right directions.
[58]
Specifically, the secondary battery 100 may be a pouch-type secondary battery 100. In particular, such a pouch-type secondary battery 100 may include an electrode assembly, an electrolyte, and a pouch 120.
[59]
Here, the pouch 120 may have a concave storage unit 115 formed therein. In addition, an electrode assembly (not shown) and an electrolyte (not shown) may be accommodated in the receiving part 115. In addition, the pouch includes an outer insulating layer, a metal layer, and an inner adhesive layer, and an inner adhesive layer adheres to each other on an edge portion of the pouch 120, thereby forming a sealing portion. Furthermore, a terrace portion S may be formed at each of both ends of the pouch 120 on which the anode lead 111 and the cathode lead 112 are formed.
[60]
In addition, the electrode assembly is an assembly of an electrode and a separator, and may be configured in a form in which at least one positive electrode plate and at least one negative electrode plate are disposed with the separator interposed therebetween. In addition, a positive electrode tab may be provided on the positive electrode plate of the electrode assembly, and one or more positive electrode tabs may be connected to the positive electrode lead 111.
[61]
Here, the positive lead 111 has one end connected to the positive electrode tab and the other end exposed to the outside of the pouch 120, and the exposed part is an electrode terminal of the secondary battery 100, for example, a secondary It can function as a positive terminal of the battery 100.
[62]
In addition, a negative electrode tab may be provided on the negative electrode plate of the electrode assembly, and one or more negative electrode tabs may be connected to the negative electrode lead 112. In addition, the negative lead 112 has one end connected to the negative electrode tab and the other end exposed to the outside of the pouch 120, and the exposed part is an electrode terminal of the secondary battery 100, for example, a secondary battery. It can function as a negative terminal of (100).
[63]
Furthermore, the positive electrode lead 111 and the negative electrode lead 112 may be formed at opposite ends of the secondary battery 100 in opposite directions based on the center of the secondary battery 100. That is, the positive electrode lead 111 may be provided at one end with respect to the center of the secondary battery 100. In addition, the negative lead 112 may be provided at the other end of the secondary battery 100 based on the center of the secondary battery 100. For example, as shown in FIGS. 1 and 2, each secondary battery 100 may be configured such that the positive lead 111 and the negative lead 112 protrude forward and backward.
[64]
Accordingly, according to this configuration of the present invention, there is no interference between the positive electrode lead 111 and the negative electrode lead 112 in one secondary battery 100, and the area of ​​the electrode lead 110 can be increased.
[65]
In addition, the positive lead 111 and the negative lead 112 may be formed in a plate shape. In particular, the positive lead 111 and the negative lead 112 may protrude in a horizontal direction with a wide surface erected to face left and right.
[66]
In addition, a plurality of secondary batteries 100 may be included in the battery module 200 and may be arranged to be stacked in at least one direction. For example, as shown in FIGS. 1 and 2, a plurality of pouch-type secondary batteries 100 may be stacked side by side in a horizontal direction.
[67]
At this time, each pouch-type secondary battery 100, when viewed in the F direction (shown in FIG. 1), has two wide surfaces positioned on the left and right sides, and sealing portions are positioned at the top and bottom, front and rear. It can be arranged in a form that stands approximately perpendicular to the ground. In other words, each secondary battery 100 may be configured to be erected in a vertical direction. In the meantime, in the present specification, unless otherwise specified, it is based on the case of looking in the F direction with respect to the up, down, front, back, left, and right directions.
[68]
However, the battery module 200 according to the present invention is not limited to the pouch-type secondary battery 100 described above, and various secondary batteries 100 known at the time of filing of the present invention may be employed.
[69]
3 is a partially enlarged perspective view showing an enlarged area C′ of the battery module of FIG. 1. And, FIG. 4 is a horizontal cross-sectional view schematically showing the battery module cut along the line A-A' of FIG. 1.
[70]
Referring back to FIGS. 3 and 4 along with FIG. 1, the bus bar assembly 220 may be located in front or rear of the cell assembly 210. In addition, the bus bar assembly 220 includes a plurality of bus bars 221 and a bus bar frame 225.
[71]
Specifically, the bus bar 221 may include a conductive material to electrically connect the plurality of secondary batteries 100. That is, the bus bar 221 may include a conductive material having a relatively high electrical conductivity by contacting the electrode leads 110 provided in each of the plurality of secondary batteries 100. For example, the busbar may be a copper alloy or an aluminum alloy.
[72]
For example, the bus bar 221 may contact a plurality of electrode leads 111 of the same polarity or a plurality of electrode leads 112 of different polarities to electrically connect the plurality of secondary batteries 100. .
[73]
Moreover, the bus bar 221 may have a metal plate shape. Specifically, the shape of the metal plate may be a bar shape elongated in one direction.
[74]
In addition, one end of the bus bar 221 may be electrically connected to the sensing circuit board (not shown) by a sensing lead (not shown). Furthermore, the sensing circuit board may include a measuring element to measure voltages, currents, and the like of the plurality of secondary batteries 100.
[75]
In addition, the bus bar frame 225 may have the bus bar 221 mounted on the outer surface. In addition, the bus bar frame 225 may be provided with an insulating material so as to be electrically insulated from the bus bar 221. For example, the bus bar frame 225 may be made of a plastic material.
[76]
Moreover, the bus bar frame 225 may include a bus bar fixing portion 226 configured to fix the upper end portion 221U and the lower end portion 221B of the bus bar 221.
[77]
Specifically, the busbar fixing part 226 may be formed with insertion spaces 227S and 228S elongated in the left-right direction so that the left-right position of the bus bar 221 can be freely set. That is, the upper end 221U or the lower end 221B of the bus bar 221 may be inserted into the insertion spaces 227S and 228S of the bus bar fixing part 226 to be fixed. Accordingly, the bus bar 221 may be fixed to fit a set left-right position of the bus bar 221 on the outer surface of the bus bar frame 225.
[78]
5 is a perspective view schematically showing a bus bar and a bus bar frame, which are some configurations of a battery module according to an embodiment of the present invention. And, FIG. 6 is a front view schematically showing a bus bar frame, which is a part of a battery module according to an embodiment of the present invention.
[79]
Along with FIG. 4, referring to FIGS. 5 and 6, at least one through hole H2 may be formed in the plurality of bus bars 221 so that the electrode lead 110 is inserted. In addition, the bus bar frame 225 has an opening H1 so that the through hole H2 of the bus bar 221 is exposed inward as the position of the bus bar 221 in the left and right direction is varied. A formed busbar opening 229 may be provided. Further, the through hole H2 may be formed to penetrate the plate shape of the bus bar 221 in a front-rear direction.
[80]
That is, even if the position of the bus bar opening part 229 in the left and right direction is changed, a part of the bus bar 221 mounted on the bus bar frame 225 may be exposed to the inside. The opening H1 may be formed so that it can be performed. In addition, the busbar opening 229 may have a plurality of openings (not shown) in some cases. In addition, each of the plurality of openings may be formed to have a length greater than the length of one bus bar 221 in the left-right direction.
[81]
Alternatively, the busbar opening 229 may have one opening H1 instead of a plurality. Furthermore, the opening H1 may be formed to be wider than the total length of the widths of the plurality of bus bars 221 in the left and right directions. That is, one opening H1 may be formed in the busbar opening 229 so that a part of rear surfaces of the entire plurality of busbars 221 mounted on the outer surface is exposed to the inside.
[82]
Therefore, according to this configuration of the present invention, the bus bar frame 225, the bus bar fixing portion 226 may be formed so as to be freely set the position of the left and right direction of the bus bar 221, The busbar opening 229 is provided so that the opening H1 into which the electrode lead 110 can be inserted can be provided without affecting the change of the position of the bus bar 221 in the left and right directions, It is possible to reset the position of the bus bar 221 in the left and right direction without changing the design of the bus bar frame 225.
[83]
Furthermore, even if the size of the applied bus bar 221 in the left and right direction is changed for reasons such as a change in the electrical connection configuration (serial or parallel connection structure) of the plurality of secondary batteries 100 of the battery module 200, Without changing the design of the bus bar frame 225, it can be applied in the form of an existing bus bar frame 225. Accordingly, it is possible to reduce the production cost incurred when manufacturing the new type of battery module 200.
[84]
In addition, the bus bar 221 may have a plate shape in which front and rear surfaces are relatively wider than a side surface. Furthermore, at least one through hole H2 may be formed in the plate shape of the bus bar 221. In addition, the electrode lead 110 of the secondary battery 100 may be inserted into the through hole H2.
[85]
Referring back to FIGS. 3 and 4, when viewed in the F direction of FIG. 1, the electrode lead 110 inserted into the through hole H2 of the bus bar 221 may have an end bent in the left and right direction. have. Further, a side surface of the bent end of the electrode lead 110 may be configured to contact the front or rear surface of the bus bar 221.
[86]
Further, an end of the electrode lead 110 inserted into the opening H1 of the bus bar frame 225 may protrude to face the left-right side of the bus bar 221. In addition, an end of the electrode lead 110 may be bent in a left-right direction to be in contact with an outer surface of the bus bar 221.
[87]
For example, as shown in FIG. 5, six bus bars 221 are provided in the bus bar assembly 220 located in the front. In addition, the six bus bars 221 may have a plate shape in which front and rear surfaces are wider than side surfaces. In addition, one through hole H2 may be formed in the bus bar 221 so that the electrode lead 110 is inserted.
[88]
Furthermore, for example, as shown in FIG. 3, the electrode leads 110 of the four secondary batteries 100 may be configured to contact each of the six bus bars 221. And, of the four electrode leads 110, two electrode leads 110 are inserted to face the side of the bus bar 221, and the remaining two electrode leads 110 penetrate through the bus bar 221 It may be inserted into the sphere H2 and configured to contact the bus bar 221.
[89]
Accordingly, according to this configuration of the present invention, as the bus bar 221 has a plate shape and a through hole H2 is formed in the plate shape, the electrode leads 110 of the plurality of secondary batteries 100 ) Are spaced apart at appropriate intervals to facilitate contact between the bus bar 221 and the electrode lead 110.
[90]
Referring back to FIGS. 5 and 6, the bus bar fixing part 226 has a shape of a ring to press at least one of the upper end 221U and the lower end 221B of the bus bar 221 in an inward direction. It may have a hook structure 227 with. In addition, one hook structure 227 may be configured to fix the upper end 221U or the lower end 221B of one or more bus bars 221.
[91]
For example, as shown in Figure 5, the bus bar fixing portion 226, a hook structure 227 having a shape of a ring to press the upper end (221U) of the six bus bars 221 in the inward direction Five can be formed.
[92]
In addition, an insertion space 227S extending in the left-right direction for accommodating the upper end portion 221U of the bus bar 221 may be formed inside the ring portion of the hook structure 227. Furthermore, the upper end portion 221U of the bus bar 221 inserted into the insertion space 227S may be configured to be movable in the left and right directions within the insertion space 227S.
[93]
Therefore, according to this configuration of the present invention, the bus bar fixing part 226 is provided with a hook structure 227 extending in the left and right direction so that the position where the bus bar 221 is to be fixed can be freely set. , Even when the size or location of the bus bar 221 is changed due to the design change of the battery module 200, the bus bar frame 225 does not need to be redesigned or manufactured again, 225) can be used. Accordingly, it is possible to save time and cost according to the design change, and thus the production cost of the battery module 200 can be greatly reduced.
[94]
7 is a schematic front view of a bus bar frame, which is a part of a battery module according to another embodiment of the present invention.
[95]
Referring to FIG. 7 along with FIG. 5, the bus bar fixing part 226 provided in the battery module 200 according to another embodiment of the present invention includes an upper end portion 221U and a lower end portion of the bus bar 221 ( Hook structures 227U and 227B may be provided to press each of 221B in the inward direction.
[96]
For example, as shown in FIG. 7, five hook structures 227U configured to fix the upper end 221U of the bus bar 221 on the outer surface of the bus bar frame 225B and the bus bar ( Five hook structures 227B configured to fix the lower end 221B of the 221 may be formed.
[97]
Therefore, according to this configuration of the present invention, when configuring the hook structure 227 for pressing each of the upper end (221U) and lower end (221B) of the bus bar 221 in the inward direction, the bus bar 221 The upper portion (221U) and the lower portion (221B) can be firmly fixed to the bus bar frame 225, it is possible to effectively prevent the bus bar 221 from being easily separated due to an external shock, and the battery module 200 Can further increase the durability of.
[98]
Referring back to FIGS. 5 and 6, the bus bar fixing part 226 includes an insertion groove 228 configured to insert at least one of the upper end 221U and the lower end 221B of the bus bar 221 Can be equipped. In addition, the insertion groove 228 may have a shape in which a groove inserted in an upper or lower direction extends in a horizontal direction.
[99]
In addition, the insertion groove 228 has an insertion space 228S that extends long in the left and right direction so that the upper end portion 221U or the lower end portion 221B of the bus bar 221 is inserted and can be moved in the left and right direction. Can be formed.
[100]
However, the bus bar 221 may be moved in the left and right direction only by a pressing force in the left and right direction, and after the position setting of the bus bar 221 is finished, the bus bar fixing portion 226 The position may be fixed and may not move in the left or right direction.
[101]
For example, as shown in Figure 5, the outer surface of the bus bar frame 225 is formed with an insertion groove 228 for inserting and receiving the lower end portions 221B of the six bus bars 221 I can. In addition, the insertion groove 228 may have a shape in which a groove inserted in a lower direction extends in a horizontal direction. In addition, the bus bar 221 inserted into the insertion groove 228 may be formed with an insertion space 228S elongated in the left-right direction so as to be movable in the left-right direction.
[102]
Therefore, according to this configuration of the present invention, by providing an insertion groove 228 extending in the left and right direction on the outside of the bus bar frame 225, the bus bar 221 according to the design change of the battery module 200 Even when changing the size or position of the bus bar frame 225, without the need to redesign or re-manufacture, it is possible to use the existing bus bar frame 225. Accordingly, it is possible to save time and cost according to the design change, so that the production cost of the battery module 200 can be greatly reduced.
[103]
8 is a front view schematically showing a bus bar frame, which is a part of a battery module according to another embodiment of the present invention.
[104]
Referring to FIG. 8 along with FIG. 5, the upper end portion 221U of the bus bar 221 is inserted into the outer surface of the bus bar frame 225C, and a groove inserted in the upper direction extends in the left and right direction. A groove 228U and an insertion groove 228B into which the lower end portion 221B of the bus bar 221 is inserted and the groove inserted in the lower direction extends long in the left and right direction.
[105]
In addition, the bus bar 221 may insert injection molding the bus bar frame 225C so that it can be inserted and fixed in the insertion groove 228 formed in the bus bar frame 225C. That is, after inserting the bus bar 221 in the mold in advance, injecting the molten material of the bus bar frame 225C, and curing it in the shape of the bus bar frame 225C, the bus bar 221 is It may be manufactured in a form inserted into the busbar frame 225C.
[106]
Therefore, according to this configuration of the present invention, the bus bar frame (225C) is an insertion groove configured to be moved in the left and right direction while receiving the upper end (221U) and the lower end (221B) of the bus bar 221 By providing 228, there is an advantage that the position of the bus bar 221 and the size of the left and right direction can be freely set.
[107]
9 is a front view schematically showing a rear busbar frame and a mounted busbar, which are some components of a battery module according to an embodiment of the present invention.
[108]
Referring to FIG. 9 along with FIG. 1, a module bus bar 223 connected to a module terminal 240 may be mounted on the bus bar frame 225 mounted at the rear of the battery module 200. Specifically, the module bus bar 223 may be configured to electrically connect between the plurality of secondary batteries 100 and the module terminal 240. Here, the module terminal 240 is a terminal provided for electrical connection between the battery module 200 and an external device (not shown), and a positive module terminal 240A and a negative module terminal 240B according to electrical polarity. ) Can be included.
[109]
In addition, at least one hook structure 227C for pressing and fixing the side end of the module bus bar 223 may be formed on the bus bar frame 225.
[110]
For example, as shown in FIG. 9, on the outer surface of the bus bar frame 225, four hook structures 227C capable of pressing the left and right side ends of the two module bus bars 223 Can be formed.
[111]
Therefore, according to this configuration of the present invention, the bus bar frame 225 is, by forming a separate hook structure 227C so as to fix the module bus bar 223, the bus bar frame 225 Even when the module bus bar 223 is not applied, the existing bus bar frame 225 can be used without the need to change the design of the bus bar frame 225. In addition, regardless of whether the module terminal 240 is applied to the outer surface of the busbar frame 225, it can be applied to both front and rear of the battery module 200, so the design cost and manufacture of the busbar frame 225 Cost can be effectively reduced.
[112]
And, the battery module 200, in addition to the secondary battery 100 and the bus bar assembly 220, the end plate of a metal material located at the top and bottom of the secondary battery 100, the battery module 200 A sensing assembly including a sensing lead, a sensing circuit board, etc. is further provided to sense the voltage of the secondary battery 100 by being connected to the electrode lead 110 of the secondary battery 100 and flowing air between the interior and exterior. can do.
[113]
FIG. 10 is a front view schematically showing a rear busbar frame and a mounted busbar, which are some components of a battery module according to another embodiment of the present invention.
[114]
Referring to FIG. 10 along with FIGS. 1 and 6, a bus bar assembly 220B of a battery module according to another embodiment is compared with a bus bar 221 provided in the bus bar assembly 220 of FIG. 9. Accordingly, a bus bar 221b having a relatively wider width in the left and right direction may be provided. In addition, the bus bar 221b may have two through holes H2 formed therein.
[115]
That is, at least one electrode lead 110 may be inserted into each of the two through holes H2 formed in the bus bar 221b to contact the outer surface of the bus bar 221. Accordingly, the bus bar 221 may be applied to connect six secondary batteries 100 in parallel.
[116]
In addition, the bus bar frame 225 of FIG. 10 has a plurality of hook structures 227 and an insertion groove 228 capable of accommodating the lower end 221B of the bus bar 221b. 226) may be formed.
[117]
For example, as shown in FIG. 10, the bus bar assembly 220B includes three bus bars 221b having two through holes H2 and two modules having one through hole H2. A bus bar 223 may be provided.
[118]
Accordingly, according to this configuration of the present invention, a bus bar fixing portion 226 having a hook structure 227 and an insertion groove 228 is formed on the bus bar frame 225, and a bus bar having one opening By providing the opening portion 229, it is possible to accommodate the bus bar 221b of various sizes or types in the left and right direction.
[119]
11 is a partial perspective view schematically showing a state in which a bus bar, which is a part of a battery module according to an embodiment of the present invention, is mounted on a bus bar frame.
[120]
Referring to FIG. 11 along with FIG. 5, the bus bar frame 225 may have an insertion groove 228 formed to insert the lower end 221B of the bus bar 221. In addition, a plurality of fixing protrusions 228P protruding in a direction in which the bus bar 221 is located may be formed on the inner surface of the insertion groove 228 at predetermined intervals.
[121]
Furthermore, a fitting groove 221G inserted in an upper direction may be formed at a lower end of the bus bar 221 so that the fixing protrusion 228P is inserted into the inside. In addition, a plurality of the fixing protrusions 228P may be formed by being spaced apart at predetermined intervals along an inner surface of the insertion groove 228 in the left and right direction.
[122]
That is, the bus bar assembly 220, so that the fitting groove 221G formed in the lower end 221B of the bus bar 221 and the fixing protrusion 228P formed on the inner surface of the insertion groove 228 are coupled to each other, The lower end 221B of the bus bar 221 may be inserted into the insertion groove 228. At this time, after inserting the lower end (221B) of the bus bar 221 at an angle into the insertion groove 228, insert the upper end (221U) of the bus bar 221 to the lower end (221B) of the bus bar 221 It can be inserted into the hook structure 227 by rotating and pressing the center in the inward direction.
[123]
Therefore, according to this configuration of the present invention, using a fastening structure of the fixing protrusion 228P formed in the insertion groove 228 and the fitting groove 221G formed in the bus bar 221, the bus bar 221 is In addition to preventing the movement in the left and right direction at the set position, after the bus bar 221 is inserted into the insertion groove 228, the upper end portion 221U of the bus bar 221 in the hook structure 227 ) Can be inserted to guide the rotational movement, it is possible to increase the manufacturing efficiency.
[124]
12 is a partial perspective view schematically showing a state in which a bus bar, which is a part of a battery module according to another exemplary embodiment, is mounted on a bus bar frame.
[125]
Referring to FIG. 12, the insertion groove 228 formed in the bus bar frame 225D is interposed between the plurality of bus bars 221 and configured to set a separation distance between the plurality of bus bars 221 The adjuster 224 may be inserted inside. Specifically, the distance adjuster 224 may be in the form of a bar extending long in the left and right direction.
[126]
In addition, the bar-shaped distance adjuster 224 may have a width that can be inserted into the insertion groove 228. Furthermore, the distance adjustment rod 224 may be formed by adjusting the length of the distance adjustment rod 224 in the left and right directions according to the size or number of the bus bars 221.
[127]
13 is a partial perspective view schematically showing a state mounted on a bus bar frame, which is a part of a battery module according to another embodiment of the present invention.
[128]
Referring to FIG. 13, in the bus bar frame 225E of the battery module according to another embodiment, an insertion groove 228 configured to insert the lower end 221B of the bus bar 221 may be formed. Further, a pressing protrusion 228Z configured to press the lower end 221B of the bus bar 221 in an outward direction may be formed on the inner surface of the insertion groove 228.
[129]
Furthermore, a plurality of pressing protrusions 228Z may be formed on the inner surface of the insertion groove 228 by being spaced apart by a predetermined distance. In addition, the compression protrusion 228Z may be configured to gradually increase in size protruding outwardly toward a lower direction.
[130]
Therefore, according to this configuration of the present invention, the pressing protrusion 228Z formed in the insertion groove 228 only needs to insert the lower end 221B of the bus bar 221 into the insertion groove 228 in a downward direction. , Since the bus bar 221 can be firmly fixed to the bus bar frame 225, the durability of the battery module 200 can be effectively increased.
[131]
Furthermore, the battery pack according to the present invention may include one or more battery modules 200 according to the present invention. In addition, the battery pack according to the present invention includes, in addition to the battery module 200, a pack case for accommodating the battery module 200, various devices for controlling charge/discharge of the battery module 200, such as BMS (Battery Management System), a current sensor, a fuse, etc. may be further included.
[132]
Further, the battery pack according to the present invention can be applied to a vehicle such as an electric vehicle. That is, the vehicle according to the present invention may include the battery pack according to the present invention.
[133]
Meanwhile, in the present specification, terms indicating directions such as up, down, left, right, before, and after are used, but these terms are only for convenience of description and vary depending on the location of the object or the observer. It is obvious to those skilled in the art of the present invention.
[134]
[135]
As described above, although the present invention has been described by 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.
[136]
Meanwhile, in the present specification, terms indicating directions such as up, down, left, right, before, and after are used, but these terms are only for convenience of description and vary depending on the location of the object or the observer. It is obvious to those skilled in the art of the present invention.
[137]
[138]
As described above, although the present invention has been described by 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.
[139]
[Explanation of code]
[140]
200: battery module 210: cell assembly
[141]
100: secondary battery 220: bus bar assembly
[142]
221: bus bar 225: bus bar frame
[143]
223: module busbar 240: module terminal
[144]
226: busbar fixing portion 229: busbar opening
[145]
H1: opening H2: through hole
[146]
227: hook structure 228: insertion groove
[147]
228P: Fixing projection 221G: Fitting groove
[148]
224: distance adjuster 228Z: pressing projection
Industrial availability
[149]
The present invention relates to a battery module and a battery pack including the same. In addition, the present invention can be used in an industry related to an electronic device or automobile with the battery module.
Claims
[Claim 1]
A cell assembly including a plurality of secondary batteries each having a plurality of electrode leads and arranged to be stacked in at least one direction; And a plurality of bus bars electrically connecting between the plurality of secondary batteries and having at least one through hole formed therein so that the electrode leads are inserted, and a bus bar frame configured to mount the plurality of bus bars on an outer surface. Including an assembly, wherein the bus bar frame is a bus bar fixing unit configured to have an insertion space extending in the left and right directions to freely set a position of the bus bar in the left and right directions, and to fix the upper and lower ends of the bus bar And a bus bar opening portion opened so that the through hole of the bus bar is exposed inward as the position of the bus bar in the left and right direction is changed.
[Claim 2]
The battery module of claim 1, wherein the bus bar has a plate shape, and a through hole penetrating in the front-rear direction is formed in the plate shape of the bus bar.
[Claim 3]
The battery module according to claim 2, wherein the bus bar fixing part has a hook structure in which a shape of a ring extends in a left-right direction to press at least one of an upper end and a lower end of the bus bar in an inward direction. .
[Claim 4]
The method of claim 2, wherein the bus bar fixing part comprises an insertion groove in which at least one of the upper and lower ends of the bus bar is inserted and the groove inserted in the upper or lower direction extends in the left and right direction. Battery module.
[Claim 5]
The fitting of claim 4, wherein a plurality of fixing protrusions protruding in a direction in which the bus bar is located are formed on an inner surface of the insertion groove at predetermined intervals, and an upper direction is inserted into an end of the bus bar so that the fixing protrusion is inserted into the interior. Battery module, characterized in that the groove is formed.
[Claim 6]
The battery module according to claim 4, wherein a distance adjusting rod interposed between the plurality of bus bars and extending in a horizontal direction is inserted into the insertion groove.
[Claim 7]
The battery module of claim 4, wherein a pressing protrusion is formed on an inner surface of the insertion groove to press the lower end of the bus bar in an outward direction.
[Claim 8]
The battery module of claim 2, wherein the bus bar opening portion is opened to a length greater than a length of the bus bar in a left-right direction.
[Claim 9]
The battery module of claim 8, wherein the bus bar opening part has one opening formed so that a part of rear surfaces of all the plurality of bus bars mounted on an outer surface thereof is exposed to the inside.
[Claim 10]
A cell assembly including a plurality of secondary batteries each having a plurality of electrode leads and arranged to be stacked in at least one direction; And a plurality of busbars electrically connected between the plurality of secondary batteries and formed with at least one through hole so that the electrode leads are inserted and electrically connected to the sensing circuit board, and the plurality of bus bars are mounted on the outer surface. Including a bus bar assembly having a bus bar frame, wherein the bus bar frame is formed with an insertion space elongated in the left and right direction so as to freely set a position of the bus bar in the left and right directions, and the upper and lower ends of the bus bar A bus bar fixing portion configured to fix the bus bar, and a bus bar opening portion opened so that the through hole of the bus bar is exposed inward as the position of the bus bar in the left and right direction is varied, and the bus bar fixing portion comprises: At least one of the upper and lower ends of the bus bar is inserted, and the groove inserted in the upper or lower direction has an insertion groove extending in the left and right direction, and a fixing protrusion protruding in the direction in which the bus bar is located on the inner surface of the insertion groove A battery module, characterized in that a plurality of is formed at predetermined intervals, and a fitting groove in which an upper direction is inserted so that the fixing protrusion is inserted into the end of the bus bar is formed.
[Claim 11]
A battery pack comprising at least one battery module according to any one of claims 1 to 9.
[Claim 12]
A vehicle comprising the battery pack according to claim 11.