KR102055424B1 - Unit For Supporting Busbar Located At Inside Of Battery Pack - Google Patents

Abstract

The present invention discloses a busbar support unit located inside of a battery pack such that it is suitable for easily performing assembly of a battery cell and bus bar without the use of a welding jig during manufacture of the battery pack. The busbar support unit according to the present invention includes: a base case including a receiving structure at an edge of one side of a floor and a seating structure at an edge of the other side of the floor; And a sensing circuit unit having a first sensing circuit structure and a second sensing circuit structure having a branched structure inserted into holes formed at edges of one side and the other side of the bottom, respectively.

Description

Unit For Supporting Busbar Located At Inside Of Battery Pack}

The present invention relates to a busbar support unit located inside a battery pack suitable for easily assembling components without the use of a welding jig.

Recently, in order to reduce air pollution due to exhaust gas of a vehicle, a vehicle has been manufactured based on a study to secure driving force using an internal combustion engine and / or an electric motor. Accordingly, the vehicle has evolved in the order of a hybrid vehicle, a plug-in hybrid vehicle, and an electric vehicle. In this case, the hybrid vehicle and the plug-in hybrid vehicle have an internal combustion engine, an electric motor and a battery pack, and the electric vehicle has an electric motor and a battery pack without an internal combustion engine.

In addition, the battery pack has also evolved with hybrid vehicles, plug-in hybrid vehicles and electric vehicles. The battery pack is configured to be chargeable outside and / or inside the electric vehicle. The battery pack has a pack case and a battery module, and the pack case is composed of a lower case and an upper case to be electrically or physically coupled to the battery module. Here, the battery module has cartridges, battery cells, bus bars and sensing blocks.

The combination of the pack case and the battery module is performed by assembling the cartridge, the battery cell, the bus bar and the sensing block in the lower case and the upper case. In this case, the assembly of the battery cell and the bus bar is performed by welding the bus bar to the electrode leads of the battery cell using a welding jig. The use of the welding jig requires an operator's repetitive work to handle the welding jig in the assembly of the battery cell and bus bar. The repetitive operation increases the number of workers' work in assembling the battery pack, thereby lowering the productivity of the battery pack and increasing the manufacturing cost of the battery pack.

The present invention has been made under the background of the prior art as described above, and is suitable for reducing the labor of the operator due to the use of the welding jig by performing the assembly of the battery cell and the bus bar without the use of the welding jig during the manufacture of the battery pack. It is to provide a busbar support unit that is located inside the battery pack.

Bus bar support unit located inside the battery pack according to the present invention for achieving the above technical problem, the receiving wall is located along the edge of one side of the bottom, a plurality of receiving pillars located on the receiving wall and And a receiving structure having a plurality of receiving partitions protruding from the bottom between the plurality of receiving pillars, and a seating wall positioned along an edge of the other side of the floor, a plurality of seating pillars positioned on the seating wall; And a seating structure having a plurality of seating partitions protruding from the bottom to face the plurality of receiving partitions, respectively, and extending toward the plurality of seating pillars to contact an upper portion of the seating wall and a portion of the seating pillars. Base case; And a sensing circuit unit having a first sensing circuit structure and a second sensing circuit structure having a branched structure penetrating the bottom and inserted into the receiving structure and the seating structure, respectively, wherein the first sensing circuit structure is located at the bottom of the receiving structure. The second sensing circuit structure is surrounded by a wall, the plurality of accommodation pillars and the plurality of accommodation partitions, and has a plurality of first busbar support pillars between the plurality of accommodation pillars and the plurality of accommodation partitions. It is characterized by having a plurality of second bus bar support pillars surrounded by the seating wall and the plurality of seating partitions at the bottom and between the seating pillars and the seating partitions at the top.

According to the present invention, the accommodating wall may protrude in a 'co' shape from the edge of the one side of the bottom and open toward the upper and center regions of the bottom.

Preferably, the uppermost level of the receiving wall may be located at a lower level from the bottom than the highest level of the receiving pillar and the highest level of the receiving partition.

According to the invention, the plurality of receiving pillars are located at the upper portion of the receiving wall such that the plurality of receiving pillars are positioned between both outer sides of the plurality of first busbar supporting pillars and the plurality of first busbar supporting pillars. Can be in contact with the inner wall.

Preferably, the plurality of receiving pillars may expose the plurality of first busbar support pillars from the inside of the receiving structure toward the outside on the receiving wall.

In one aspect, the plurality of receiving pillars, '└' type end-shaped pillars corresponding to the first edge in the receiving wall, so as to be sequentially located from the left to the right along the width direction of the bottom, the first An end-shaped pillar of '┛' type corresponding to the second corner facing the edge, and '⊥' type of the end-shaped pillars between the first corner and the second corner.

In accordance with the present invention, each receiving partition may face the center of the corresponding first busbar support column.

According to the present invention, the seating wall may protrude in a 'c' shape from the edge of the other side of the bottom in the base case and open toward the upper and center regions of the bottom.

Preferably, the top level of the seating wall may be located at a lower level from the bottom than the top level of the seating column and the top level of the seating partition.

According to the present invention, the plurality of seating pillars are located on both sides of the outermost side of the plurality of second busbar support pillars and between the plurality of second busbar support pillars between the plurality of second busbar support pillars. The top of the seating wall may be in contact with the cross section of the seating wall so as to face oppositely.

Preferably, the plurality of seating pillars may expose the plurality of second busbar support pillars from the inside of the seating structure toward the outside on the seating wall.

In one aspect, the plurality of seating pillars are end-shaped pillars of a '┌' type corresponding to the first corners in the seating wall so as to be sequentially positioned from the left to the right along the width direction of the bottom, the first corners. End-shaped pillars of the '┐' type corresponding to the second corner facing the, and '-' type of the end-shaped pillars 44 between the first corner and the second corner.

According to the present invention, the first sensing circuit structure has a first sensing block and a first insulating cover, the first sensing block having a first printed circuit board at the bottom and the plurality of first busbar support pillars at the top. Each first busbar support pillar has a first pillar and a first bus bar positioned along the first pillar, the first insulating cover covering the first printed circuit board.

Preferably, the first bus bar may be electrically connected to the first printed circuit board.

According to the present invention, the second sensing circuit structure has a second sensing block and a second insulating cover, the second sensing block having a second printed circuit board at the bottom and the plurality of second busbar support pillars at the top. Each second busbar support pillar has a second pillar and a second bus bar positioned along the second pillar, wherein the second insulating cover may cover the second printed circuit board.

Preferably, the second bus bar may be electrically connected to the second printed circuit board.

According to the present invention, the plurality of second busbar support pillars may have a different number than the plurality of first busbar support pillars.

According to the present invention, the first sensing circuit structure may be electrically connected to the second sensing circuit structure.

The busbar support unit according to the present invention includes a base case and a sensing circuit structure that are detachable with respect to each other, and the sensing circuit structure is inserted into the base case by inserting a finger-shaped sensing circuit structure under an edge of the base case. And at least one bus bar positioned on top of the sensing circuit structure to be secured to the base case and exposed to the outside of the base case without the use of a welding jig.

The busbar support unit according to the present invention is configured to bend a plurality of battery cells having electrode leads in both directions on a base case in a base case, and to bend at least one bus bar positioned on the sensing circuit structure in two battery cells. Insertion between overlapping electrode leads can be configured to easily contact the bus bar and electrode leads without welding jig and to weld the bus bar and electrode leads outside of the base case.

The following drawings appended hereto illustrate one embodiment of the present invention, and together with the following description serve to further understand the spirit of the present invention, the present invention is limited only to those described in such drawings. It should not be interpreted.
1 is a perspective view illustrating a battery pack according to an exemplary embodiment of the present invention.
FIG. 2 is a plan view illustrating a bottom surface of the bottom of the base case of FIG. 1.
3 is a partial perspective view showing the receiving structure on the upper surface of the bottom of the base case of FIG.
4 is a partial perspective view showing the seating structure in the upper surface of the bottom of the base case of FIG.
FIG. 5 is a plan view illustrating an upper surface of a bottom of the base case corresponding to region 'P' of FIG. 2.
FIG. 6 is a partial perspective view illustrating a part of the sensing circuit unit of FIG. 1 and a structure support. FIG.
FIG. 7 is a bottom view illustrating a coupling relationship between a first sensing circuit structure, a second sensing circuit structure, and a structure supporter on the bottom surface of the bottom of the base case of FIG. 1.
FIG. 8 is a plan view illustrating a coupling relationship between the first sensing circuit structure, the second sensing circuit structure, and the structure supporter at the upper surface of the bottom of the base case corresponding to the region 'P' of FIG. 7.
9 is a partial perspective view illustrating a coupling relationship between the base case, the sensing circuit unit, and the battery assembly of FIG. 1.
FIG. 10 is a partial perspective view illustrating in detail a coupling relationship between a first bus bar supporting pillar of a first sensing circuit structure and an electrode lead of a battery cell in the accommodating structure of the base case of FIG. 9.
FIG. 11 is a side view illustrating a coupling relationship between a first bus bar of a first sensing circuit structure and an electrode lead of a battery cell in an accommodating structure of a base case along a direction 'A' of FIG. 9.
FIG. 12 is a side view illustrating a coupling relationship between a second bus bar of a second sensing circuit structure and an electrode lead of a battery cell in a mounting structure of a base case along a direction 'B' of FIG. 9.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own applications. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one embodiment of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them in the present invention point of view. It should be understood that there may be variations and examples.

In the embodiments described below, the battery cell refers to a lithium secondary battery. Here, the lithium secondary battery is a generic term for a secondary battery in which lithium ions act as operating ions during charging and discharging to induce an electrochemical reaction in the positive electrode and the negative electrode. However, it is apparent that the present invention is not limited to the type of battery.

1 is a perspective view illustrating a battery pack according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the battery pack 170 according to the present invention includes a base case 60, a sensing circuit unit 80, a structure support 110, a battery assembly 140, and a cover case 160. The base case 60 has a receiving structure 30 at one edge of one side (eg, a longitudinal direction) of the bottom 10 and a seating structure 50 at an edge of the other side. The receiving structure 30 has a receiving wall 21, a plurality of receiving pillars 26, and a plurality of receiving partitions 29.

The seating structure 50 has a seating wall 42, a plurality of seating pillars 45, and a plurality of seating partitions 47. The sensing circuit unit 80 has a first sensing circuit structure 74 and a second sensing circuit structure 78. The first sensing circuit structure 74 has a first sensing block 68A and a first insulating cover 68B. The first sensing block 68A has a plurality of first busbar support pillars 66 thereon.

The first insulating cover 68B may cover an opposing surface of the first sensing block 68A under the plurality of first busbar support pillars 66. Preferably, the first sensing circuit structure 74 may be fitted to the receiving structure 30 through the edge of one side of the bottom 10 in the base case 60 (see FIG. 7). The second sensing circuit structure 78 has a second sensing block 69A and a second insulating cover 69B.

The second sensing block 69A has a plurality of second bus bar support pillars 67 thereon. The second insulating cover 69B may cover an opposing surface of the second sensing block 69A under the plurality of second bus bar support pillars 67. Preferably, the second sensing circuit structure 78 may be fitted to the seating structure 50 through the edge of the other side of the bottom 10 in the base case 60 (see FIG. 7).

Here, the sensing circuit unit 80 may form the bus bar support unit 90 together with the base case 60. The structure support 110 has a first support plate 103 on one side, a second support plate 109 on the other side, and a coupling plate 106 between the first support plate 103 and the second support plate 109. .

When the sensing circuit unit 80 is inserted into the base case 60, the structure support 110 is connected to the bottom of the base case 60 under the bottom 10 of the base case 60 through the coupling plate 106. The first support plate 103 and the second support plate 109 may be in contact with the first sensing circuit structure 74 and the second sensing structure 78, respectively (see FIG. 7). The battery assembly 140 may be seated on the base case 60 (see FIG. 9).

The battery assembly 140 has a plurality of cartridges 120 and a plurality of battery cells 138. One cartridge 120 surrounds two battery cells 138. Since six cartridges 120 are shown in the drawing, the six cartridges 120 may accommodate a total of twelve battery cells 138. However, the number of the cartridge 120 and the battery cell 138 is not limited thereto, and may be different from the drawings. One battery cell 138 has two electrode leads 134 each facing in both directions.

More specifically, some of the electrode leads 134 of the plurality of battery cells 138 protrude separately from the two outermost battery cells 138 in the receiving structure 30 and the remaining battery cells 138. The two pieces are bent toward each other and overlap each other with each other as a unit (see FIGS. 10 and 11).

The remaining electrode leads 134 are bent toward each other and overlap each other in the mounting structure 50 between the plurality of battery cells 138 as a unit (see FIG. 12). That is, the electrode leads 134 may be paired with each other between the remaining battery cells 138 except for the two outermost battery cells 138 in the receiving structure 30 to form a pair of five mounting structures 50. Are paired two by one between the plurality of battery cells 138 to form six pairs (see FIGS. 11 and 12).

When the sensing circuit unit 80 is inserted into the base case 60, on the base case 60, each pair of the five pairs of electrode leads 134 passes through the receiving structure 30 to the first sensing block ( 68A) and fitted to the first busbar support column 66 (see FIGS. 10 and 11), each pair of the six pairs of electrode leads being connected to the second sensing block 69A through the mounting structure 50. 2 may be fitted to the busbar support pillar 67 (see FIG. 12).

Here, each pair of electrode leads 134 may be in contact with the first busbar support pillar 66 or the second busbar support pillar 67 in the receiving structure 30 or the mounting structure 50. In addition, the cover case 150 may cover the battery assembly 140 and be coupled to the base case 60.

FIG. 2 is a plan view illustrating a bottom surface of the bottom of the base case of FIG. 1. 3 is a partial perspective view showing the receiving structure on the upper surface of the bottom of the base case of FIG. 1, and FIG. 4 is a partial perspective view showing the seating structure on the upper surface of the bottom of the base case of FIG. 1.

Referring to FIG. 2, the base case 60 includes a first coupling hole 3 at one edge of the bottom 10, second coupling holes 5 at a central region, and an edge of the other side of the base case 60. Has a third coupling hole 9. The first coupling holes 3, the second coupling holes 5, and the third coupling holes 9 may include a lower surface LS and an upper surface of the bottom 10 of the base case 60. surface (US) of FIG. 3 or FIG. 4).

The first coupling hole 3 is located in a direction perpendicular to one direction of the bottom 10 (for example, in a width direction). Preferably, the first coupling hole 3 is located below the plurality of receiving pillars 26 of the receiving structure 30 of FIG. 3 when viewed from the top surface US of the bottom 10 of the base case 60. do.

In more detail, the plurality of receiving pillars 26 are spaced apart from the bottom 10, for example the first coupling hole 3, in the base case 60 and at the top of the receiving wall 21. It contacts the inner wall of 21, and it extends toward the receiving wall 21 (refer FIG. 3).

Accordingly, the bottom 10 of the base case 60 exposes all of the plurality of accommodation pillars 26 to the outside through the first coupling hole 3. The plurality of receiving pillars 26 divides the first coupling hole 9 when viewed from the bottom surface LS of the bottom 10 of the base case 60. The second coupling hole 5 is positioned in a line shape along one direction (eg, a longitudinal direction) at the bottom 10 of the base case 60.

Preferably, the second coupling hole 5 is a line-shaped protrusion projecting from the upper surface US when viewed from the upper surface US of the bottom 10 of the base case 60 (FIG. 3 or 4). 6) located between them. That is, the projection 6 is located between the receiving partition 29 and the seating partition 47 in FIG. 1.

The third coupling hole 9 is located in a direction perpendicular to one direction of the bottom 10 (for example, in a width direction). Preferably, the third coupling hole 9 is located below the plurality of seating partitions 47 of the seating structures 50 of FIG. 4 when viewed from the top surface US of the bottom 10 of the base case 60. do.

In more detail, the plurality of seating partitions 47 protrude from the bottom 10 around the third coupling hole 9 and are spaced apart from the third coupling hole 9 on the third coupling hole 9. Passes through the third engagement hole 9 and contacts the inner wall of the mounting wall 42 at the top of the mounting wall 42.

Accordingly, the bottom 10 of the base case 60 exposes all of the plurality of seating partitions 47 shown in FIG. 1 to the outside through the third coupling hole 9. The plurality of seating partitions 47 divide the third coupling hole 9 when viewed from the bottom surface LS of the bottom 10 of the base case 60.

Referring to FIG. 3, the receiving structure 30 includes a receiving wall 21 and a plurality of receiving pillars 26 and the receiving wall 21 fixed to the receiving wall 21 so as to be surrounded by the receiving wall 21. A plurality of receiving partitions 29 are spaced apart from the. The accommodating wall 21 protrudes in a 'co' shape from an edge of one side of the bottom 10 of the base case 60 and opens toward the upper and center regions of the bottom 10 (FIGS. 1 and 11). Reference).

Preferably, the highest level of the receiving wall 21 is located at a lower level from the bottom 10 than the highest level of the receiving pillar 26 and the highest level of the receiving partition 29. The plurality of receiving pillars 26 are first corners in the receiving wall 21 such that they are sequentially positioned from left to right along a direction perpendicular to one direction (for example, a width direction) at the bottom 10. An end-shaped column 22 having a '└' shape corresponding to the end portion pillar 23 having a '┛' shape corresponding to the second corner facing the first corner, and a 'between the first and second corners. End-shaped pillars 24 of the '' shape.

Preferably, the accommodating pillar 26 is an end-shaped pillar and end-shaped in the form of '└', '┛', or '┛' along a direction perpendicular to one direction (for example, the width direction) at the bottom 10. It contacts the inner wall of the receiving wall 21 at the top of the receiving wall 21 through the bottom of the column. In one aspect, the plurality of receiving pillars 26 are located on the first coupling hole (3 in FIG. 2). The plurality of receiving partitions 29 are positioned around the first coupling hole 3 on the bottom 10 and between the receiving pillars 26 (see FIG. 5).

Here, the receiving wall 21 and the receiving partitions 29 surround the lower portion of the first sensing block 68A and the first insulating cover 68B of FIG. 1, and the receiving pillars 26 and the receiving partition 29 Are arranged to enclose a first busbar support column (66 in FIG. 1) located on top of the first sensing block 68A (see FIGS. 10 and 11). In detail, two receiving pillars 26 and one receiving partition 29 define one space 25 for receiving one first busbar support pillar 66 (see FIG. 5).

Preferably, the receiving partitions 29 define the spaces 28 that accommodate the battery cells 138 of FIG. 1 together with the receiving wall 21 (see FIG. 5).

Referring to FIG. 4, the seating structure 50 is mounted on the seating wall 42, a plurality of seating pillars 45 on the seating wall 42, and the seating wall 42 to be surrounded by the seating wall 42. A plurality of seating partitions 47 are fixed. The seating wall 42 protrudes in a 'c' shape from the edge of the other side of the bottom 10 in the base case 60 and is opened toward the upper and center regions of the bottom 10 (FIGS. 1 and 12). Reference).

Preferably, the top level of the mounting wall 42 is located at a level lower than the top level of the mounting pillar 45 and the top level of the mounting partition 47 from the bottom 10 of the base case 60. do. The plurality of seating pillars 45 contact the cross section of the seating wall 42 at the top of the seating wall 42.

Preferably, the plurality of seating pillars 45 are formed at the mounting wall 42 such that they are sequentially positioned from left to right along a direction perpendicular to one direction (for example, a width direction) at the bottom 10. 43A of end-shaped pillars of type '┌' corresponding to the first corner, end-shaped pillars (43B in FIG. 12) of the '┐' type corresponding to the second corner facing the first corner, and the first corner and the first corner. It consists of end-shaped pillars 44 of the '-' type between the two edges.

The plurality of seating partitions 47 protrude from the bottom 10 around the third joining hole 9 and extend toward the seating pillars 45 and from the third joining hole 9 on the third joining hole 9. It is spaced apart and passes through the third coupling hole 9 in contact with the upper part of the mounting wall 42 and a part of the mounting pillars 45 (see FIG. 5). More specifically, the seating partition 47 protrudes from the floor 10 and defines a seating hole 9A on the third engagement hole 9 of the floor 10.

The seating hole 9A communicates with the third engagement hole 9. Here, the seating wall 42 and the seating partitions 47 surround the lower portion of the second sensing block 69A and the second insulating cover 69B, and the seating pillars 45 and the seating partitions 47. ) Are configured to surround the second busbar support pillars 67 located on top of the second sensing block 69A (see FIG. 12).

Preferably, the mounting partitions 47 define spaces 48 for seating the battery cells 138 of FIG. 1 together with the mounting walls 42 (see FIG. 5).

FIG. 5 is a plan view illustrating an upper surface of a bottom of the base case corresponding to region 'P' of FIG. 2.

Referring to FIG. 5, the base case 60 has a first coupling hole 3 at the edge of one side and a third coupling hole at the edge of the other side when viewed from the top surface US of the bottom 10. Has (9). Preferably, the base case 60 has a receiving structure 30 around the first coupling hole (3). More specifically, the receiving structure 30 has a receiving wall 21 which surrounds the first coupling hole 3 along the rim of the bottom 10 at the edge of one side of the bottom 10.

Here, the receiving structure 30 is surrounded by the receiving wall (21) and a plurality of receiving pillars 26 for subdividing the first coupling holes (3) overlapping the first coupling holes (3), and a plurality of accommodation It has a plurality of receiving partitions 29 positioned between the pillars 26. In addition, in one side, the base case 60 has a seating structure 50 around the third coupling hole (9). More specifically, the seating structure 50 has a seating wall 42 which surrounds the third coupling hole 9 along the rim of the floor 10 at the edge of the other side of the floor 10.

Here, the seating structure 50 has a plurality of seating partitions 47 which are surrounded by the seating wall 42 and overlap the third joining hole 9 to subdivide the third joining hole 9. Meanwhile, the number of second coupling holes 5 between the first coupling hole 3 and the third coupling hole 9 is equal to the number of protrusions 6.

FIG. 6 is a partial perspective view illustrating a part of the sensing circuit unit of FIG. 1 and a structure support. FIG.

Referring to FIG. 6, the sensing circuit unit 80 has a first sensing circuit structure 74 and a second sensing circuit structure (78 of FIG. 1). The first sensing circuit structure 74 and the second sensing circuit structure 78 are electrically connected to each other through an electric line (L). The first sensing circuit structure 74 and the second sensing circuit structure 78 have a branched structure.

The first sensing circuit structure 74 includes a first sensing block 68A and a first insulating cover 68B. The first sensing block 68A has a first printed circuit board 61 at the bottom and five first busbar support pillars 66 at the top. The first busbar support pillar 66 is bent toward each other in each pair of five pairs of electrode leads 134 on one side of the plurality of battery cells 138 in FIG. 1 or FIG. It may be inserted into a space generated inside the lid 134.

The first bus bar support column 66 has a first bus bar 65 and a first bus bar 65 positioned along the first column 64. The first bus bar 65 covers at least one surface of the first pillar 64 and surrounds an upper end of the first pillar 64 in a '⌒' shape (see FIG. 10). Here, the first bus bar 64 is electrically connected to the first printed circuit board 61A at the lower portion of the first pillar 64.

The first insulating cover 68B is clip-coupled with the first sensing block 68A to cover the first printed circuit board 61A. Meanwhile, the second sensing circuit structure 78 includes a second sensing block 69A and a second insulating cover 69B similarly to the first sensing circuit structure (see FIG. 1). The second sensing block 69A has a second printed circuit board (61B in FIG. 1) at the bottom and six second busbar support pillars (67 in FIG. 1 or 12) at the top.

The second bus bar support pillar 67 is bent toward each other in each pair of six pairs of electrode leads 134 on the other side of the plurality of battery cells 138 in FIG. 1 and overlapping two electrode leads 134. It can be inserted into the space generated inside the). The second busbar support column 67 has the same components as the first busbar support column 66. That is, the second bus bar support pillar 67 has a second bus bar 65 and a second bus bar 65 positioned along the second pillar 64.

The second bus bar 65 may cover at least one surface of the second pillar 64 and surround the upper end of the second pillar 64 in a '⌒' shape. Here, the second bus bar 64 is electrically connected to the second printed circuit board 61B at the bottom of the second pillar 65. The second insulating cover 69B is clip-coupled with the second sensing block 69A to cover the second printed circuit board 61B.

On the other hand, the structure support 110 has a first support plate 103 on one side, a coupling plate 106 in the central region and a second support plate 109 on the other side. When the sensing circuit unit 80 and the structure support 110 are coupled to the base case 60 through the bottom surface LS of the bottom 10 of the base case 60 of FIG. 2, the first support plate 103 is in contact with the first sensing circuit structure 74 under the first sensing circuit structure 74.

The coupling plate 106 has a clip 105 in the second coupling holes 5 of the bottom 10 of the base case 60 between the first sensing circuit structure 74 and the second sensing circuit structure 78. Insert them and combine with the bottom (10). The second support plate 109 is in contact with the second sensing circuit structure 78 under the second sensing circuit structure 78. Preferably, the first support plate 103, the coupling plate 106 and the second support plate 109 are integrally formed in the structure support 110.

FIG. 7 is a bottom view illustrating a coupling relationship between a first sensing circuit structure, a second sensing circuit structure, and a structure supporter at a bottom surface of the bottom of the base case of FIG. 1, and FIG. 8 corresponds to area 'P' of FIG. 7. A plan view showing a coupling relationship between the first sensing circuit structure, the second sensing circuit structure, and the structure support on the upper surface of the bottom of the base case.

7 and 8, the first sensing circuit structure 74 is connected to the first coupling hole 3 of the bottom 10 through the lower surface LS of the bottom 10 of the base case 60. When fitted, the first sensing circuit structure 74 penetrates the bottom 10 of the base case 60 and is provided with a plurality of receiving pillars in the receiving structure 30 located on the top surface US of the bottom 10. A plurality of first busbar support pillars 66 are positioned between 26 and the plurality of receiving partitions 29.

Here, the plurality of receiving pillars 26 are located at both outer sides of the outermost sides of the plurality of first busbar support pillars 66 and are positioned between the plurality of first busbar support pillars 66. In contact with the inner wall of the receiving wall 21 at the top (see FIG. 3). Each receiving partition 29 is spaced apart from the plurality of first bus bar support pillars 66 at the bottom 10 of the base case 60 to face the center of the first bus bar 65.

In addition, when the second sensing circuit structure 74 is fitted into the third coupling hole 9 of the bottom 10 through the bottom surface LS of the bottom 10 of the base case 60, the second The sensing circuit structure 78 penetrates the bottom 10 of the base case 60 and is seated on the mounting structure 50, which is located on the top surface US of the bottom 10. A plurality of second busbar support pillars 67 between 45) and the plurality of seating partitions 47.

The mounting wall 42 is positioned along the edge of the base case 60 at the upper surface US of the base case 60 to face the receiving wall 21. The plurality of seating pillars 45 are located at both outer sides of the plurality of second busbar support pillars 67 and between the plurality of second busbar support pillars 67. It is in contact with the end face of the mounting wall 42 at the top of the mounting wall 42 (see FIG. 4) so as to face the 67. The plurality of seating partitions 47 face one-to-one with the receiving partitions 29 through the central region of the base case 60.

On the other hand, when the structure support 110 is in contact with the bottom 10 through the bottom surface LS of the bottom 10 of the base case 60, the structure support 110 is the first sensing circuit structure 74 The second support plate 109 is positioned below the first support plate 103 and the second sensing circuit structure 78. The first support plate 103 and the second support plate 109 support the first sensing circuit structure 74 and the second sensing circuit structure 78, respectively.

In addition, the structure support 110 is a second coupling hole (5) of the bottom 10 of the clip (105 in Fig. 6) of the coupling plate 106 between the first support plate 103 and the second support plate 109. It is inserted into the field and coupled to the base case 60.

9 is a partial perspective view illustrating a coupling relationship between the base case, the sensing circuit unit, and the battery assembly of FIG. 1, and FIG. 10 is a first bus bar support pillar and the battery cell of the first sensing circuit structure in the receiving structure of the base case of FIG. 9. A partial perspective view showing in detail the coupling relationship between the electrode leads.

FIG. 11 is a side view illustrating a coupling relationship between a first bus bar of a first sensing circuit structure and an electrode lead of a battery cell in an accommodating structure of a base case along the direction 'A' of FIG. 9, and FIG. 12 is a 'B' of FIG. 9. A side view showing a coupling relationship between a second bus bar of a second sensing circuit structure and an electrode lead of a battery cell in a mounting structure of a base case along a direction.

9 to 12, when the base case 60, the sensing circuit unit 80 of FIG. 1, and the battery assembly 140 are coupled to each other, the sensing circuit unit 80 may accommodate the base case 60. The structure 30 has a first sensing circuit structure 74 and a second sensing circuit structure 78 in the seating structure 50 of the base case 60. The first sensing circuit structure 74 has a first sensing block (68A in FIG. 1 or 6) and a first insulating cover (68B in FIG. 1 or 6).

The first sensing block 68A has first busbar support pillars 66 thereon (see FIGS. 1, 6 and 11). 3 and 8, the base case 60 of the first sensing block 68A is formed through the receiving wall 21 and the plurality of receiving partitions 29 at the lower portion of the receiving structure 30. A lower portion (eg, a first printed circuit board (61A in FIG. 6)) and a first insulating cover 68B (see FIG. 11), and a plurality of receiving pillars 26 at the top of the receiving structure 30; The plurality of first busbar support pillars 66 is enclosed through the plurality of receiving partitions 29 (see FIGS. 10 and 11).

In addition, the second sensing circuit structure 78 has a second sensing block (69A in FIG. 1) and a second insulating cover (69B in FIG. 1). The second sensing block 69A has second busbar support pillars 67 thereon (see FIG. 1). 4 and 8, the base case 60 of the second sensing block 69A is formed through the seating wall 42 and the plurality of seating partitions 47 at the bottom of the seating structure 50. A lower portion (eg, a second printed circuit board (61B in FIG. 1)) and a second insulating cover 69B (see FIG. 12), and a plurality of seating pillars 45 at the top of the seating structure 50; The plurality of second busbar support pillars 67 is enclosed through the plurality of seating partitions 47 (see FIG. 12).

Each of the first bus bar support column 66 and the second bus bar support column 67 has a first column 64 and a first bus bar 65 (see FIGS. 11 and 12). However, five first bus bar support pillars 66 are arranged in the receiving structure 30 in a direction perpendicular to one direction of the bottom 10 of the base case 60 (for example, in the width direction) ( 1, 6 and 8). The plurality of receiving pillars 26 connects a plurality of first bus bar support pillars 66, for example, a plurality of first bus bars 65, from the inside of the receiving structure 30 to the outside on the receiving wall 21. To the side (see FIGS. 9-11).

Six second bus bar support pillars 67 are arranged on the seating structure 50 in a direction perpendicular to one direction of the bottom 10 of the base case 60 (for example, in a width direction) (FIG. 8). Reference). The mounting pillars 45 expose a plurality of second bus bar support pillars 67, for example, a plurality of second bus bars 65, from the inside of the mounting structure 50 to the outside on the mounting wall 21. (See FIG. 12). The battery assembly 140 has a plurality of cartridges 120 and a plurality of battery cells 138. One cartridge 120 houses two battery cells 138.

Considering FIG. 8, the receiving wall 21 faces the seating wall 42 along the edge of the base case 60, and the plurality of receiving partitions 29 are the bottom 10 of the base case 60. The cartridge 120 is disposed between the one receiving wall 21 and the other receiving partition wall 29 adjacent to the receiving wall 21, since the cartridge 120 faces one-to-one on the mounting partition wall 47. And in a straight line along one direction (eg, longitudinal direction) between one seating wall 42 and the other seating partition 47 adjacent to the seating wall 42 along a copper line on the floor 10. Position (see FIG. 9).

That is, the one cartridge 120 is a straight line in one direction (eg, longitudinal direction) between two receiving partitions 29 and between two seating partitions 47 along a copper line on the bottom 10. Is located. Here, the base case 60 has one housing column between the receiving wall 21 and one receiving partition 29 adjacent to the receiving wall 21 or between two adjacent receiving partitions 29. (26) (see FIG. 8), the electrode leads (134A, 134B of FIG. 10) of two battery cells (138A, 138B of FIG. 10) in one cartridge 120 have one receiving column 26 ) And surround two adjacent first busbar support pillars (66A, 66B in FIG. 10), respectively (see FIG. 10).

In addition, the base case 60 is a second one between the seating wall 42 and one seating partition 47 adjacent to the seating wall 42 or between two seating partitions 47 adjacent to each other. With the busbar support pillar 67 (see FIG. 8), the electrode leads (134G, 134H in FIG. 12) of the two battery cells (138G, 138H in FIG. 12) within one cartridge 120 are mounted wall. Between 42 and one seating partition 47 adjacent to the seating wall 42 or between two adjacent seating partitions 47 surrounding one second busbar support column 67. (See FIG. 12).

In more detail, the electrode leads 134 of the plurality of battery cells 138 are separately from two outermost battery cells (138C and 138D of FIG. 11) on one side of the plurality of battery cells 138. Protruded to form two pairs of two pairs on one side of the remaining battery cells (138E and 138F of FIG. 11) and two pairs on the other side of the plurality of battery cells 138 to form six pairs. The electrode leads (134C and 134D of FIG. 11) of the two outermost battery cells 138C and 138D have negative and positive electrodes, respectively, as electrical polarities.

Ends of the electrode leads 134C and 134D may protrude from the corresponding receiving pillars 26 to be gathered in one place outside of the base case 60 to be easily electrically connected to the surrounding structure according to the design purpose. Can be. In the five pairs of electrode leads 134, a pair of electrode leads (134E and 134F in FIG. 11) are bent toward each other to overlap and contact each other and to form a positive and a negative electrode with electrical polarities. Have each. Here, the pair of electrode leads 134E and 134F define a predetermined space on the inner side facing the ground (see FIG. 10).

Since the space is penetrated by one first busbar support column 66, the pair of electrode leads 134E and 134F surround the corresponding first busbar support column 66. The pair of electrode leads 134E and 134F is in contact with the first bus bar 65 at one first bus bar support column 66 (see FIG. 10). The electrode leads 134E and 134F and the first bus bar 65 are laser-welded through the welding region (154 of FIG. 11) of the electrode leads 134E.

In addition, in the six pairs of electrode leads 134, a pair of electrode leads (134G and 134H of FIG. 12) are bent toward each other to overlap and contact each other, and have a negative polarity and a positive polarity with electrical polarities. Each has a pole. Here, the pair of electrode leads 134G and 134H defines a predetermined space inward toward the ground, similar to the electrode leads 134E and 134F. Since the space is penetrated by one second busbar support pillar 67, the pair of electrode leads 134G and 134H surround the corresponding second busbar support pillar 67.

The pair of electrode leads 134G and 134H contact the second bus bar 65 in the same manner as in FIG. 10 in one second bus bar support pillar 67. The electrode leads 134G and 134H and the second bus bar 65 are laser-welded through the welding region 158 of FIG. 12 of the electrode lead 134G.

Next, a method of manufacturing a battery pack according to the present invention is described with reference to FIG. 1.

Referring to FIG. 1, a base case 60, a sensing circuit unit 80, a structure support 110, a battery assembly 140, and a cover case 160 according to the present invention may be prepared. Subsequently, the sensing circuit unit 80 may be coupled to the base case 60. The base case 60 and the sensing circuit unit 80 may constitute a bus bar support unit 90. Here, the first sensing circuit structure 74 and the second sensing circuit structure 78 of the sensing circuit unit 80 are respectively formed in the first coupling hole 3 and the third coupling hole 9 of the base case 60. Can be fitted (see FIGS. 7 and 8).

The first sensing circuit structure 74 may have a first sensing block 68A and a first insulating cover 68B. The first sensing block 68A may have a first printed circuit board 61 at a lower portion thereof and a plurality of first busbar support units 66 at an upper portion thereof. Similarly, the second sensing circuit structure 78 may have a second sensing block 69A and a second insulating cover 69B. The second sensing block 69A may have a second printed circuit board 61B at a lower portion thereof and a plurality of second bus bar support units 67 at an upper portion thereof.

When the first sensing circuit structure 74 and the second sensing circuit structure 78 are fitted into the first coupling hole 3 and the third coupling hole 9 of the base case 60, respectively, the first sensing The first printed circuit board 61 and the first insulating cover 68B of the circuit structure 74 are surrounded by the receiving wall 21, the plurality of receiving pillars 26 and the plurality of receiving partitions 29, and The plurality of first busbar support pillars 66 of the first sensing circuit structure 74 may be located between the plurality of receiving pillars 26 and the plurality of receiving partitions 29 (see FIGS. 9 to 11). .

The second printed circuit board 61B and the second insulating cover 69B of the second sensing circuit structure 78 are surrounded by a seating wall 42 and a plurality of seating partitions 47, and the second sensing The plurality of second busbar support pillars 67 of the circuit structure 78 may be located between the plurality of seating pillars 45 and the plurality of seating partitions 47 (see FIGS. 9 and 12). Here, one first bus bar support pillar 66 may have a first bus bar 65 on the first pillar 64 and the first pillar 64 (see FIG. 6).

The plurality of receiving pillars 26 may expose a plurality of first bus bars 65 on the receiving wall 21 (see FIGS. 10 and 11). Also, one second busbar support pillar 67 has a second bus bar 65 on the second pillar 64 and the second pillar 64 similar to the first busbar support pillar 66. Can be. The plurality of seating pillars 45 may expose a plurality of second bus bars 65 on the seating wall 42 (see FIG. 12).

Next, the structure support 110 may contact the bottom 10 through the bottom surface LS of the bottom 10 of the base case 60 (see FIG. 7). The structure support 110 may position the second support plate 109 under the first sensing plate 103 and the second sensing circuit structure 78 under the first sensing circuit structure 74. In addition, the structure support 110 is a second coupling hole (5) of the bottom 10 of the clip (105 in Fig. 6) of the coupling plate 106 between the first support plate 103 and the second support plate 109. Can be inserted into some of these.

Subsequently, the battery assembly 140 may be seated on the base case 60. The battery assembly 140 has a plurality of cartridges 120 and a plurality of battery cells 138. One cartridge 120 may accommodate two battery cells 138. The plurality of cartridges 120 are arranged between the receiving wall 21 and the outermost receiving partition walls 29 adjacent to the receiving wall 21 in FIGS. 8 and 9, between the plurality of receiving partition walls 29, It may be arranged in a straight line between the seating wall 42 and the outermost seating partitions 47 adjacent to the seating wall 42 and between the plurality of seating partitions 47.

One battery cell 138 has two electrode leads 134 each facing in both directions. The electrode leads 134 of the plurality of battery cells 138 are paired two by one in the remaining battery cells 138 except for the two outermost battery cells 138 at one side of the plurality of battery cells 138. 5 pairs are formed, and two pairs are formed on the other side of the plurality of battery cells 138 to form 6 pairs (see FIGS. 11 and 12). In the five pairs of electrode leads 134, each pair may be fitted to the first busbar support pillar 66 through a space formed inside the electrode leads 134 that are bent and overlapped with each other (FIG. 8).

Here, the first bus bar support pillar 66 may contact the first bus bar 65 with the pair of electrode leads 134 (see FIG. 10). The pair of electrode leads 134 may be exposed to the outside of the base case 60 by two receiving pillars 26 adjacent to the receiving partition wall 21 (see FIGS. 10 and 11). In the six pairs of electrode leads 134, each pair may be fitted to the second busbar support pillar 67 through a space formed inside the electrode leads 134 that are bent and overlapped with respect to one another (FIG. 8).

Here, the second bus bar support pillar 67 may contact the second bus bar 65 to the pair of electrode leads 134 (see FIG. 12). The pair of electrode leads 134 may be exposed to the outside of the base case 60 by two mounting pillars 45 adjacent to the mounting partition wall 42 (see FIG. 12).

Subsequently, the first and second bus bars between the plurality of accommodation pillars 26 and the plurality of seating pillars 45 may be used by using the base case 60 and the sensing circuit unit 80 as the bus bar support unit 90. The welding operation may be performed on the electrodes 65 and the electrode leads 134. The welding operation may be performed through the welding regions 154 of FIG. 11 and 158 of FIG. 12 to fix the electrode leads 134 to the first and second bus bars 65.

After the welding operation is performed on the electrode leads 134, the cover case 160 may be covered on the battery assembly 140. The cover case 160 may contact the base case 60. Through this, the cover case 160 may constitute the battery pack 170 together with the base case 60, the sensing circuit unit 80, the structure support 110, and the battery assembly 140.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

Claims (18)

A receiving structure having a receiving wall positioned along an edge of one side of the floor, a plurality of receiving pillars positioned above the receiving wall, and a plurality of receiving partitions projecting from the bottom between the plurality of receiving pillars, and the A mounting wall positioned along the edge of the other side of the floor, a plurality of seating pillars positioned on the seating wall, and protruding from the floor to face the plurality of receiving partitions, respectively, and extending toward the plurality of seating pillars; A base case including a seating structure having an upper portion of a seating wall and a plurality of seating partitions in contact with a portion of the seating pillars; And
A sensing circuit unit having a first sensing circuit structure and a second sensing circuit structure having a branched structure penetrating the bottom and inserted into the receiving structure and the seating structure, respectively;
The first sensing circuit structure is surrounded by the accommodation wall, the plurality of accommodation pillars and the plurality of accommodation partitions at the bottom, and supports a plurality of first busbars between the plurality of accommodation pillars and the plurality of accommodation partitions at the top. Take a pillar,
The second sensing circuit structure is surrounded by the seating wall and the plurality of seating partitions at the bottom and has a plurality of second busbar support columns between the plurality of seating columns and the seating partitions at the top,
The first sensing circuit structure has a first sensing block and a first insulating cover,
The first sensing block has a first printed circuit board at the bottom and the plurality of first busbar support pillars at the top,
Each first busbar support pillar has a first pillar and a first bus bar positioned along the first pillar,
And the first insulating cover covers the first printed circuit board. The method of claim 1,
And the receiving wall protrudes in a 'co' shape from the edge of the one side of the bottom to open toward the upper and center regions of the bottom. The method of claim 1,
And the highest level of the receiving wall is located at a level lower than the highest level of the receiving pillar and the highest level of the receiving partition from the bottom. The method of claim 1,
The plurality of receiving pillars contact the inner wall of the receiving wall at the upper portion of the receiving wall such that the plurality of receiving pillars are positioned between both outer sides of the plurality of first busbar supporting pillars and the plurality of first busbar supporting pillars. Bus bar support unit, characterized in that. The method of claim 1,
And the plurality of housing pillars expose the plurality of first busbar support pillars on the accommodation wall from the inside of the housing structure to the outside. The method of claim 1,
The plurality of accommodation pillars are end-shaped pillars of the '└' type corresponding to the first corners in the accommodation wall such that the plurality of accommodation pillars are sequentially positioned from the left side to the right side in the width direction of the bottom, facing the first corners. A busbar support unit comprising an end shaped pillar of a '┛' type corresponding to a second corner, and an end shaped pillar of a '⊥' type between the first corner and the second corner. The method of claim 1,
Each receiving partition wall faces a center of a corresponding first busbar support column. The method of claim 1,
And the seating wall protrudes in a 'c' shape from the edge of the other side of the bottom in the base case and opens toward the upper and center regions of the bottom. The method of claim 1,
And the top level of the seating wall is located at a lower level from the bottom than the top level of the seating post and the top level of the seating septum. The method of claim 1,
The plurality of seating pillars may be positioned at both sides of the outermost sides of the plurality of second busbar support pillars and positioned to face the plurality of second busbar support pillars between the plurality of second busbar support pillars. And a busbar support unit in contact with a cross section of said seating wall at an upper portion of said seating wall. The method of claim 1,
And the plurality of seating pillars expose the plurality of second busbar support pillars from the inside of the seating structure to the outside on the seating wall. The method of claim 1,
The plurality of seating pillars may be sequentially positioned from the left side to the right side along the width direction of the floor, and may have an end shape pillar having a '┌' shape corresponding to the first corner on the seating wall, and the first edge facing the first corner. A busbar supporting unit, characterized in that the end-shaped pillars of the '┐' type corresponding to the two corners, and the end-shaped pillars (44) of the '-' type between the first corner and the second corner. delete The method of claim 1,
And the first bus bar is electrically connected to the first printed circuit board. The method of claim 1,
The second sensing circuit structure has a second sensing block and a second insulating cover,
The second sensing block has a second printed circuit board at the bottom and the plurality of second busbar support pillars at the top,
Each second busbar support pillar has a second pillar and a second bus bar positioned along the second pillar,
And the second insulating cover covers the second printed circuit board. The method of claim 15,
And the second bus bar is electrically connected to the second printed circuit board. The method of claim 1,
And the plurality of second bus bar support pillars have a different number than the plurality of first bus bar support pillars. The method of claim 1,
And the first sensing circuit structure is electrically connected to the second sensing circuit structure.

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